CN117962657A - Electric Vehicles - Google Patents

Abstract

The embodiment of the present application provides an electric vehicle. The electric vehicle includes at least one set of DC sockets, a liquid cooling socket, a power battery and a liquid cooling pipeline; each set of DC sockets is connected to the power battery through a power cable, and each set of DC sockets is used to transmit the DC power output by the charging device to the power battery. The liquid cooling socket is connected to the liquid cooling pipeline, and the liquid cooling socket is used to transport the cooling medium of the external cooling system to the liquid cooling pipeline, so that the liquid cooling pipeline is used to dissipate heat for the power cable connected to each set of DC sockets, thereby meeting the heat dissipation requirements of the power cable when the power battery is charged at high power.

Description

Electric Vehicles

Technical Field

The present application relates to the field of charging, and more particularly, to an electric vehicle.

Background technique

During the charging process of an electric vehicle, the DC socket of the electric vehicle receives the charging power output by the charging pile and transmits the charging power to the power battery through the power cable. At present, as users' requirements for the charging time of electric vehicles increase, the charging power output by the charging pile to the DC socket is getting larger and larger. Correspondingly, the charging power transmitted to the power battery through the power cable is getting larger and larger, so as to achieve high-power charging of the electric vehicle by the charging pile. However, the increase in charging power is often accompanied by a significant increase in the heat generated by the power cable. If this heat cannot be removed in time, it may cause safety problems when the electric vehicle is charged at high power.

Summary of the invention

The present application provides an electric vehicle, which can use a cooling medium provided by an external cooling system to dissipate heat from a power cable connected between a DC socket and a power battery, which is beneficial to meeting the heat dissipation requirements of the power cable when the power battery of the electric vehicle is charged at high power, thereby improving the safety of the electric vehicle during high-power charging and ensuring the normal high-power charging of the electric vehicle.

In a first aspect, an electric vehicle is provided, comprising at least one set of DC sockets, a liquid cooling socket, a power battery and a liquid cooling pipeline; each set of DC sockets is connected to the power battery via a power cable, and each set of DC sockets is used to transmit the DC power output by a charging device to the power battery; the liquid cooling sockets are connected to the liquid cooling pipeline, and the liquid cooling sockets are used to transport the cooling medium of an external cooling system to the liquid cooling pipeline; the liquid cooling pipeline is used to dissipate heat from the power cables connected to each set of DC sockets.

In the electric vehicle provided in the embodiment of the present application, the liquid cooling pipeline can be connected to the external cooling system through the liquid cooling socket. Then, when the power battery is charged at high power, the liquid cooling pipeline can use the cooling medium provided by the external cooling system to perform liquid cooling on the power cables connected between each set of DC sockets and the power battery, so as to meet the heat dissipation requirements of the power cables when the power battery is charged at high power, thereby improving the charging safety of the electric vehicle and ensuring the normal high-power charging of the electric vehicle.

In one implementation, the liquid cooling socket includes a liquid inlet socket and a liquid outlet socket; the liquid cooling pipeline is coated on the periphery of the power cables connected to each group of DC sockets, or the power cables connected to each group of DC sockets are wrapped around the periphery of the liquid cooling pipeline; the input end of the liquid cooling pipeline is connected to the liquid inlet socket, and the output end of the liquid cooling pipeline is connected to the liquid outlet socket; the cooling medium of the off-vehicle cooling system flows into the liquid cooling pipeline through the liquid inlet socket, and flows out of the electric vehicle through the liquid outlet socket.

In the above technical solution, the cooling medium provided by the off-vehicle cooling system can circulate between the off-vehicle cooling system and the liquid cooling pipeline. In addition, during the flow of the cooling medium in the liquid cooling pipeline, the cooling medium can perform heat exchange with the power cables connected to each set of DC sockets through the liquid cooling pipeline to remove the heat generated by the power cables and realize liquid cooling of the power cables.

In one implementation, the electric vehicle also includes a liquid cooling plate, each group of DC sockets includes a positive DC socket and a negative DC socket, and the liquid cooling pipeline includes a first liquid inlet pipeline and a first liquid outlet pipeline; the first liquid inlet pipeline is coated on the periphery of a power cable connected to one of the positive DC socket and the negative DC socket, and the first liquid outlet pipeline is coated on the periphery of a power cable connected to the other of the positive DC socket and the negative DC socket; the liquid inlet socket is connected to the input end of the first liquid inlet pipeline, the output end of the first liquid inlet pipeline is connected to the input end of the first liquid outlet pipeline through the liquid cooling plate, and the output end of the first liquid outlet pipeline is connected to the liquid outlet socket.

In the above technical solution, the cooling medium provided by the off-vehicle cooling system can first flow into the first liquid inlet pipeline through the liquid inlet socket, and perform heat exchange with the power cable covered by the first liquid inlet pipeline to remove the heat generated by the power cable. Then, the cooling medium flows into the first liquid outlet pipeline through the liquid cooling plate, and performs heat exchange with the power cable covered by the first liquid outlet pipeline to remove the heat generated by the power cable, thereby realizing liquid cooling and heat dissipation of the power cables connected to each set of DC sockets.

In addition, by connecting the liquid cooling plate between the first liquid inlet pipeline and the first liquid outlet pipeline, on the one hand, the first liquid inlet pipeline and the first liquid outlet pipeline can be connected; on the other hand, the liquid cooling channel of the liquid cooling plate is equivalent to a part of the liquid cooling pipeline, which is conducive to simplifying the pipeline design between the output end of the first liquid inlet pipeline and the input end of the first liquid outlet pipeline.

In one implementation, the electric vehicle also includes a liquid cooling plate, each group of DC sockets includes a positive DC socket and a negative DC socket, and the liquid cooling pipeline includes a first liquid inlet pipeline and a first liquid outlet pipeline; a power cable connected to one of the positive DC socket and the negative DC socket is wrapped around the outer periphery of the first liquid inlet pipeline, and a power cable connected to the other of the positive DC socket and the negative DC socket is wrapped around the outer periphery of the first liquid outlet pipeline; the liquid inlet socket is connected to the input end of the first liquid inlet pipeline, the output end of the first liquid inlet pipeline is connected to the input end of the first liquid outlet pipeline through the liquid cooling plate, and the output end of the first liquid outlet pipeline is connected to the liquid outlet socket.

In the above technical solution, the cooling medium provided by the off-vehicle cooling system can first flow into the first liquid inlet pipeline through the liquid inlet socket, and perform heat exchange with the power cables surrounding the outer periphery of the first liquid inlet pipeline to remove the heat generated by the power cables. Then, the cooling medium flows into the first liquid outlet pipeline through the liquid cooling plate, and performs heat exchange with the power cables surrounding the outer periphery of the first liquid outlet pipeline to remove the heat generated by the power cables, thereby achieving liquid cooling and heat dissipation of the power cables connected to each set of DC sockets.

In addition, by connecting the liquid cooling plate between the first liquid inlet pipeline and the first liquid outlet pipeline, on the one hand, the first liquid inlet pipeline and the first liquid outlet pipeline can be connected; on the other hand, the liquid cooling channel of the liquid cooling plate is equivalent to a part of the liquid cooling pipeline, which is conducive to simplifying the pipeline design between the output end of the first liquid inlet pipeline and the input end of the first liquid outlet pipeline.

In one implementation, the electric vehicle also includes a thermal management system, a second liquid inlet pipeline and a second liquid outlet pipeline; the liquid inlet socket is connected to the input end of the second liquid inlet pipeline, the output end of the second liquid inlet pipeline is connected to the input end of the second liquid outlet pipeline through the thermal management system, and the output end of the second liquid outlet pipeline is connected to the liquid outlet socket; the thermal management system is used to dissipate heat from the power battery.

In the above technical solution, the second liquid inlet pipeline and the second liquid outlet pipeline are used to connect the liquid inlet socket and the liquid outlet socket of the electric vehicle to the thermal management system, so that the electric vehicle can use the cooling medium provided by the external cooling system to perform liquid cooling and heat dissipation on the power cables connected to each group of DC sockets, and can also use the cooling medium provided by the external cooling system to perform liquid cooling and heat dissipation on the power battery. This is conducive to simultaneously meeting the heat dissipation requirements of the power battery and the power cable when the electric vehicle is charged at high power, thereby ensuring the normal high-power charging of the electric vehicle.

In one implementation, the electric vehicle also includes two three-way valves; the three interfaces of one three-way valve are respectively connected to the liquid inlet socket, the input end of the liquid cooling pipeline and the input end of the second liquid inlet pipeline; the three interfaces of the other three-way valve are respectively connected to the liquid outlet socket, the output end of the liquid cooling pipeline and the output end of the second liquid outlet pipeline.

In the above technical solution, after the cooling medium provided by the off-vehicle cooling system flows into the electric vehicle through the liquid inlet socket, it can be divided into two paths through one of the three-way valves, one path flows into the liquid cooling pipeline to dissipate the heat of the power cables connected to each set of DC sockets, and the other path flows into the thermal management system to dissipate the heat of the power battery. Afterwards, the cooling medium in the liquid cooling pipeline and the cooling medium in the thermal management system can be converged to the liquid outlet socket through another three-way valve, and then flow back to the off-vehicle cooling system through the liquid outlet socket. In this way, the recycling of the cooling medium provided by the off-vehicle cooling system is realized.

In one implementation, the electric vehicle also includes at least one cooling pool, each of the at least one cooling pool includes a liquid inlet and a liquid outlet; the liquid inlet is connected to the liquid inlet socket, and the liquid outlet is connected to the input end of the liquid cooling pipeline; at least one cooling pool is used to dissipate heat for each group of DC sockets.

In the above technical solution, by connecting at least one cooling pool between the liquid inlet socket and the input end of the liquid cooling pipeline, the at least one cooling pool can use the cooling medium provided by the external cooling system to perform liquid cooling on each group of DC sockets, thereby better meeting the heat dissipation requirements of electric vehicles during high-power charging, improving the charging safety of electric vehicles, and ensuring the normal high-power charging of electric vehicles.

In one implementation, at least one group of DC sockets includes two groups of DC sockets, and at least one cooling pool includes one cooling pool; the two groups of DC sockets are arranged along a first direction, and the positive DC sockets and the negative DC sockets of each group of DC sockets in the two groups of DC sockets are arranged along a direction perpendicular to the first direction; one cooling pool is located between the two groups of DC sockets along the first direction, and one cooling pool includes two outer surfaces arranged opposite to each other along the first direction, one outer surface faces one group of DC sockets in the two groups, and the other outer surface faces the other group of DC sockets, one outer surface is used for thermal contact with the positive DC socket and the negative DC socket of one group of DC sockets, and the other outer surface is used for thermal contact with the positive DC socket and the negative DC socket of the other group of DC sockets.

Through the above design, the cooling medium of the off-vehicle cooling system first flows into the cooling pool through the liquid inlet socket, and performs heat exchange with the positive DC socket and the negative DC socket of the two groups of DC sockets through the cooling pool to take away the heat generated by the two groups of DC sockets, thereby realizing liquid cooling of the two groups of DC sockets.

In one implementation, the electric vehicle also includes a connection confirmation socket, a connection confirmation circuit and a vehicle interface, the vehicle interface is used to connect the charging gun, at least one group of DC sockets, liquid cooling sockets and connection confirmation sockets are arranged in the vehicle interface, and the connection confirmation socket is connected to the connection confirmation circuit; each group of DC sockets is used to connect a group of DC plugs of the charging gun, the liquid cooling socket is used to connect the liquid cooling plug of the charging gun, and the connection confirmation socket is used to connect the connection confirmation plug of the charging gun; the connection confirmation circuit of the electric vehicle forms a current loop through the connection confirmation circuit connected by the connection confirmation socket and the connection confirmation plug, and the electric vehicle is used to judge the connection status of the liquid cooling socket and the liquid cooling plug, and the connection status of each group of DC sockets and a group of DC plugs according to the voltage at the detection point in the connection confirmation circuit of the electric vehicle; the electric vehicle is used to confirm that the liquid cooling socket and the liquid cooling plug are successfully connected, and each group of DC sockets is successfully connected to a group of DC plugs when the voltage at the detection point reaches a preset value.

In the above technical solution, since the connection confirmation socket is connected to the connection confirmation circuit of the electric vehicle, the electric vehicle can judge the connection status of the liquid-cooled socket and the liquid-cooled plug, and each group of DC sockets and the corresponding group of DC plugs according to the voltage of the detection point in the connection confirmation circuit. Furthermore, when the liquid-cooled socket and the liquid-cooled plug are successfully connected, when the charging device performs high-power charging on the electric vehicle, the off-vehicle cooling system can transmit cooling medium to the liquid cooling pipeline of the electric vehicle to achieve heat dissipation of the power cable by the liquid cooling pipeline. This is conducive to meeting the heat dissipation requirements of the power cable when the electric vehicle is charged at high power, improving the charging safety of the electric vehicle, and thus ensuring the normal high-power charging of the electric vehicle by the charging device.

In one implementation, the connection confirmation socket includes a first connection confirmation socket, a second connection confirmation socket and a third connection confirmation socket, the connection confirmation circuit of the electric vehicle includes a first connection confirmation circuit, a second connection confirmation circuit and a third connection confirmation circuit, the first connection confirmation socket, the second connection confirmation socket and the third connection confirmation socket are respectively connected to the first connection confirmation circuit, the second connection confirmation circuit and the third connection confirmation circuit; the electric vehicle is used to confirm the connection status of each group of DC sockets and a group of DC plugs through the first connection confirmation circuit or the second connection confirmation circuit; the electric vehicle is used to confirm the connection status of the liquid cooling socket and the liquid cooling plug through the third connection confirmation circuit.

In the above technical solution, the electric vehicle determines the connection status between the DC socket and the DC plug according to the first connection confirmation circuit or the second connection confirmation circuit, and determines the connection status between the liquid cooling socket and the liquid cooling plug according to the third connection confirmation circuit. That is to say, the electric vehicle can respectively determine the connection status between the DC socket and the DC plug, and the connection status between the liquid cooling socket and the liquid cooling plug based on different connection confirmation circuits, thereby improving the accuracy of determining the connection status.

In one implementation, the third connection confirmation circuit includes a first resistance unit, the third connection confirmation socket is connected to a voltage source through the first resistance unit, and the detection point is located between the first resistance unit and the third connection confirmation socket.

In the above technical solution, since the detection point set in the present application is connected to the voltage source in the electric vehicle, when the voltage at the detection point is the voltage output by the voltage source, the electric vehicle recognizes that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at the detection point reaches a preset value, the electric vehicle recognizes that the liquid cooling socket is connected to the liquid cooling plug. By identifying the connection state of the liquid cooling socket and the liquid cooling plug based on the voltage at the detection point, the accuracy of the electric vehicle in identifying the connection state of the liquid cooling socket and the liquid cooling plug can be improved.

In one implementation, the electric vehicle also includes an interface shell, which is mounted on the periphery of at least one group of DC sockets, liquid cooling sockets and connection confirmation sockets to form a vehicle interface; the distance between the end face of the third connection confirmation socket and the end face of the interface shell is greater than the distance between the end face of the liquid cooling socket and the end face of the interface shell; wherein, the end face of the third connection confirmation socket is the end face of the third connection confirmation socket facing the outside of the body of the electric vehicle, the end face of the interface shell is the end face of the interface shell facing the outside of the body of the electric vehicle, and the end face of the liquid cooling socket is the end face of the liquid cooling socket facing the outside of the body of the electric vehicle.

Therefore, in actual application, the liquid cooling socket of the electric vehicle and the liquid cooling plug of the charging gun are connected first, and the third connection confirmation socket of the electric vehicle and the third connection confirmation plug of the charging gun are connected later. In this way, the electric vehicle can confirm the connection status of the liquid cooling socket of the electric vehicle and the liquid cooling plug of the charging gun through the third connection confirmation circuit connected to the third connection confirmation socket, which is conducive to avoiding leakage between the liquid cooling socket and the liquid cooling plug.

In one implementation, the electric vehicle also includes a grounding socket, which is arranged in the interface shell, the grounding socket is connected to the vehicle body ground platform, and the grounding socket is used to connect the grounding plug of the charging gun; the second connection confirmation circuit includes a second resistance unit, and the second connection confirmation socket is connected to the grounding socket through the second resistance unit; the distance between the end face of the third connection confirmation socket and the end face of the interface shell is less than or equal to the distance between the end face of the second connection confirmation socket and the end face of the interface shell, wherein the end face of the second connection confirmation socket is the end face of the second connection confirmation socket facing the outside of the vehicle body of the electric vehicle.

Therefore, in actual application, the third connection confirmation socket of the electric vehicle is connected to the third connection confirmation plug of the charging gun first, and the second connection confirmation socket of the electric vehicle is connected to the second connection confirmation plug of the charging gun later, or the third connection confirmation socket of the electric vehicle is connected to the third connection confirmation plug of the charging gun, and the second connection confirmation socket of the electric vehicle is connected to the second connection confirmation plug of the charging gun at the same time. This is equivalent to the final full connection confirmation by the charging gun side, or the final full connection confirmation by the charging gun side and the electric vehicle side.

The above design complies with the provisions of the existing charging standard protocol that during the connection process of each socket of the electric vehicle and each plug of the charging gun, the second connection confirmation plug and the second connection confirmation socket are usually connected last, so that the connection of each socket of the electric vehicle and each plug of the charging gun provided by the embodiment of the present application can continue to use the connection sequence of each socket of the electric vehicle and each plug of the charging gun specified in the existing charging standard protocol. In this way, the existing charging standard protocol can be left unchanged, but a connection between a liquid cooling socket and a liquid cooling plug, and a connection between a third connection confirmation socket and a third connection confirmation plug can be added to the existing charging standard protocol, which is relatively simple to implement.

In one implementation, the distance between the end face of the third connection confirmation socket and the end face of the interface shell is equal to the distance between the end face of the second connection confirmation socket and the end face of the interface shell, and the distance between the end face of the liquid cooling socket and the end face of the interface shell is greater than or equal to the distance between the end face of the first connection confirmation socket and the end face of the interface shell, wherein the end face of the first connection confirmation socket is the end face of the first connection confirmation socket facing the outside of the body of the electric vehicle.

It can be understood that in the embodiment of the present application, the connection between the first connection confirmation socket and the first connection confirmation plug of the charging gun can indicate that the charging gun and the vehicle interface are in a semi-connected state, the connection between the second connection confirmation socket and the second connection confirmation plug of the charging gun, and the connection between the third connection confirmation socket and the third connection confirmation plug of the charging gun can indicate that the charging gun and the vehicle interface are in a fully connected state.

In the above technical solution, during the process of connecting the charging gun to the vehicle interface, the first connection confirmation socket is connected to the first connection confirmation plug first, the liquid cooling socket is connected to the liquid cooling plug, and the second connection confirmation socket is connected to the second connection confirmation plug, and the third connection confirmation socket is connected to the third connection confirmation plug last. In this way, in actual application, a traction device can be designed in the electric vehicle. When the electric vehicle detects that the first connection confirmation socket is connected to the first connection confirmation plug, that is, it detects that the charging gun and the vehicle interface are in a semi-connected state, the electric vehicle can control the traction device to pull the charging gun to move, so that the liquid cooling socket is connected to the liquid cooling plug first, and the second connection confirmation socket is connected to the second connection confirmation plug, and the third connection confirmation socket is connected to the third connection confirmation plug later, that is, the charging gun and the vehicle interface are fully connected. In this process, the charging gun is pulled to move by the traction device so that the charging gun and the vehicle interface are in a fully connected state, and the user does not need to push the charging gun manually, which is conducive to improving the user experience.

In one implementation, the electric vehicle also includes a liquid-cooled connection confirmation socket, a liquid-cooled connection confirmation circuit and two vehicle interfaces, one vehicle interface is used to connect the charging gun, and the other vehicle interface is used to connect the liquid-cooled gun, at least one group of DC sockets is arranged in one vehicle interface, the liquid-cooled socket and the liquid-cooled connection confirmation socket are arranged in the other vehicle interface, and the liquid-cooled connection confirmation socket is connected to the liquid-cooled connection confirmation circuit; the liquid-cooled socket is used to connect the liquid-cooled plug of the liquid-cooled gun, and the liquid-cooled connection confirmation socket is used to connect the liquid-cooled connection confirmation plug of the liquid-cooled gun; the liquid-cooled connection confirmation circuit of the electric vehicle forms a current loop through the liquid-cooled connection confirmation circuit connected by the liquid-cooled connection confirmation socket and the liquid-cooled connection confirmation plug, and the electric vehicle is used to judge the connection status of the liquid-cooled socket and the liquid-cooled plug according to the voltage of at least one detection point in the liquid-cooled connection confirmation circuit of the electric vehicle; the electric vehicle is used to confirm that the liquid-cooled socket and the liquid-cooled plug are successfully connected when the voltage of each detection point in at least one detection point reaches a preset value.

In the above technical solution, since the liquid-cooled connection confirmation socket is connected to the liquid-cooled connection confirmation circuit of the electric vehicle, the electric vehicle can judge the connection status of the liquid-cooled socket and the liquid-cooled plug according to the voltage of the detection point in the liquid-cooled connection confirmation circuit. Furthermore, when the liquid-cooled socket and the liquid-cooled plug are successfully connected, when the charging device performs high-power charging on the electric vehicle, the off-vehicle cooling system can transmit cooling medium to the liquid-cooling pipeline of the electric vehicle to achieve heat dissipation of the power cable by the liquid-cooling pipeline. This is conducive to meeting the heat dissipation requirements of the power cable when the electric vehicle is charged at high power, improving the charging safety of the electric vehicle, and thus helping to ensure the normal high-power charging of the electric vehicle by the charging device.

In one implementation, the liquid cooling connection confirmation socket includes a first liquid cooling connection confirmation socket, and the liquid cooling connection confirmation circuit of the electric vehicle includes a first liquid cooling connection confirmation circuit; the first liquid cooling connection confirmation circuit includes a first resistance unit, and the first liquid cooling connection confirmation socket is connected to a voltage source through the first resistance unit.

In one implementation, the at least one detection point includes one detection point located between the first resistance unit and the first liquid-cooling connection confirmation socket.

In the above technical solution, since the detection point set in the present application is connected to the voltage source in the electric vehicle, when the voltage at the detection point is the voltage output by the voltage source, the electric vehicle recognizes that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at the detection point reaches a preset value, the electric vehicle recognizes that the liquid cooling socket is connected to the liquid cooling plug. By identifying the connection state of the liquid cooling socket and the liquid cooling plug based on the voltage at the detection point, the accuracy of the electric vehicle in identifying the connection state of the liquid cooling socket and the liquid cooling plug can be improved.

In one implementation, the electric vehicle also includes an interface shell, which is sleeved on the outer periphery of the liquid-cooling socket and the liquid-cooling connection confirmation socket to form another vehicle interface; the distance between the end face of the first liquid-cooling connection confirmation socket and the end face of the interface shell is greater than the distance between the end face of the liquid-cooling socket and the end face of the interface shell; wherein, the end face of the interface shell is the end face of the interface shell facing the outside of the body of the electric vehicle, the end face of the first liquid-cooling connection confirmation socket is the end face of the first liquid-cooling connection confirmation socket facing the outside of the body of the electric vehicle, and the end face of the liquid-cooling socket is the end face of the liquid-cooling socket facing the outside of the body of the electric vehicle.

Therefore, in actual application, the liquid cooling socket of the electric vehicle and the liquid cooling plug of the liquid cooling gun are connected first, and the first liquid cooling connection confirmation socket of the electric vehicle and the first liquid cooling connection confirmation plug of the liquid cooling gun are connected later. In this way, the electric vehicle can confirm the connection status of the liquid cooling socket of the electric vehicle and the liquid cooling plug of the liquid cooling gun through the first liquid cooling connection confirmation circuit connected to the first liquid cooling connection confirmation socket, which is conducive to avoiding leakage between the liquid cooling socket and the liquid cooling plug.

In one implementation, the electric vehicle further includes a grounding socket, which is arranged in another vehicle interface, connected to the vehicle body ground platform, and used to connect the grounding plug of the liquid cooling gun; the liquid cooling connection confirmation socket includes a second liquid cooling connection confirmation socket, and the liquid cooling connection confirmation circuit of the electric vehicle includes a second liquid cooling connection confirmation circuit; the second liquid cooling connection confirmation circuit includes a second resistor unit, and the second liquid cooling connection confirmation socket is connected to the vehicle body ground platform through the second resistor unit. At least one detection point includes two detection points, one of the two detection points is located between the first resistor unit and the first liquid cooling connection confirmation socket, and the other detection point is located between the second resistor unit and the second liquid cooling connection confirmation socket.

In the above technical scheme, by setting two detection points in the liquid cooling connection confirmation circuit of the electric vehicle, and allowing the electric vehicle to identify the connection status of the liquid cooling socket and the liquid cooling plug according to the voltages of the two detection points, the accuracy of the electric vehicle in identifying the connection status of the liquid cooling socket and the liquid cooling plug can be further improved.

In one implementation, the electric vehicle also includes an interface shell, which is sleeved on the periphery of the liquid-cooled socket, the liquid-cooled connection confirmation socket and the grounding socket to form another vehicle interface; the distance between the end face of the first liquid-cooled connection confirmation socket and the end face of the interface shell is greater than the distance between the end face of the liquid-cooled socket and the end face of the interface shell, and the distance between the end face of the second liquid-cooled connection confirmation socket and the end face of the interface shell is greater than the distance between the end face of the liquid-cooled socket and the end face of the interface shell; wherein, the end face of the interface shell is the end face of the interface shell facing the outside of the body of the electric vehicle, the end face of the first liquid-cooled connection confirmation socket is the end face of the first liquid-cooled connection confirmation socket facing the outside of the body of the electric vehicle, the end face of the second liquid-cooled connection confirmation socket is the end face of the second liquid-cooled connection confirmation socket facing the outside of the body of the electric vehicle, and the end face of the liquid-cooled socket is the end face of the liquid-cooled socket facing the outside of the body of the electric vehicle.

Therefore, in actual application, the liquid cooling socket of the electric vehicle and the liquid cooling plug of the charging gun are connected first, and the first liquid cooling connection confirmation socket of the electric vehicle and the first liquid cooling connection confirmation plug of the liquid cooling gun, as well as the second liquid cooling connection confirmation socket of the electric vehicle and the second liquid cooling connection confirmation plug of the liquid cooling gun are connected later. In this way, the electric vehicle can confirm the connection status of the liquid cooling socket of the electric vehicle and the liquid cooling plug of the liquid cooling gun through the first liquid cooling connection confirmation circuit connected to the first liquid cooling connection confirmation socket and the second liquid cooling connection confirmation circuit connected to the second liquid cooling connection confirmation socket, which is conducive to avoiding leakage between the liquid cooling socket and the liquid cooling plug.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a charging system provided in an embodiment of the present application.

FIG. 2 is a schematic diagram of a charging pile in the charging system shown in FIG. 1 charging an electric vehicle.

3 to 5 are schematic diagrams of the structure of a charging system provided in an embodiment of the present application.

FIG. 6 is a schematic diagram of the structure of a charging pile provided in an embodiment of the present application.

FIG. 7 is a schematic diagram of the coordination between the charging gun in the charging pile shown in FIG. 6 and the external cooling system.

FIG8 is a schematic diagram of the structure of another charging pile provided in an embodiment of the present application.

FIG. 9 is a schematic diagram of the coordination between the charging gun and the pile end cooling system in the charging pile shown in FIG. 8 .

FIG. 10 is a schematic diagram of the structure of another charging pile provided in an embodiment of the present application.

11 to 13 are schematic structural diagrams of an electric vehicle provided in an embodiment of the present application.

FIG. 14 is a schematic diagram of the coordination of the cooling pool and the DC socket in the electric vehicle shown in FIG. 13 .

FIG. 15 is a schematic diagram of the structure of another electric vehicle provided in an embodiment of the present application.

16 to 19 are schematic diagrams of the structures of a heat dissipation system provided in an embodiment of the present application.

FIG. 20 is a schematic diagram of the structure of a charging system provided in an embodiment of the present application.

FIG21 is a schematic diagram of an interface between a liquid cooling gun and an electric vehicle provided in an embodiment of the present application.

22 to 24 are schematic diagrams of the structures of a charging system provided in an embodiment of the present application.

FIG. 25 is a schematic diagram of an interface between a charging gun and an electric vehicle provided in an embodiment of the present application.

Detailed ways

To facilitate understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

In the description of the embodiments of the present application, "connection" may refer to electrical connection, which may be understood as the transmission of signals between two electrical components by direct electrical connection or indirect electrical connection. For example, the connection between A and B may be understood as a direct electrical connection between A and B, or may be understood as an indirect electrical connection between A and B through one or more other electrical components.

In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may include one or more features either sensibly or implicitly. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two, and "at least one" and "one or more" refer to one, two or more than two.

In the description of the embodiments of the present application, unless otherwise specified, "and/or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

The following is a brief introduction to the technical terms involved in the embodiments of the present application to facilitate subsequent understanding of the embodiments of the present application.

Thermal management system (TMS): It is an important component of electric vehicles, mainly including three parts: air conditioning thermal management system, motor and electronic control cooling system, and battery thermal management system. It is used to provide the required cooling and heat for the passenger compartment, power battery, motor, air conditioner, etc., so as to perform thermal management on these management objects and keep the temperature of these management objects within the normal operating range.

The technical solution in this application will be described below in conjunction with the accompanying drawings.

First, to facilitate understanding of the technical solutions provided by the embodiments of the present application, the application scenarios to which the embodiments of the present application are applicable are first introduced below.

FIG1 exemplarily shows a schematic structural diagram of a charging system 100 provided in an embodiment of the present application.

In conjunction with (a) and (b) in FIG1 , the charging system 100 may include a charging pile 110 and an electric vehicle 120. The charging pile 110 is used to receive the AC power outputted by the external power grid 200, and convert the AC power into stable DC power and then transmit it to the electric vehicle 120 to charge the electric vehicle 120. Alternatively, the electric vehicle 120 may also output electric energy to the external power grid 200 in reverse through the charging pile 110.

In some embodiments, as shown in (a) of FIG. 1 , the charging pile 110 is a split-type charging pile. Specifically, the charging pile 110 includes a charging device 111, at least one charging terminal 112, and at least one charging gun 113. Among them, the charging device 111 is connected to each charging terminal 112, each charging terminal 112 is connected to the charging gun 113 through a cable, and each charging gun 113 is used to connect to the electric vehicle 120. In a specific implementation, one charging terminal 112 can be connected to one or more charging guns 113.

The charging device 11 includes a plurality of charging modules, which are used to convert the AC power from the external power grid 200 into stable DC power and then transmit it to the charging terminal 112. Each charging module can be an alternating current-direct current (AC-DC) conversion device or a direct current-direct current (DC-DC) conversion device. The charging terminal 112 transmits the stable DC power to the electric vehicle 120 through the connected charging gun 113.

The charging terminal 112 may include a housing, a human-machine interaction interface, a charging control unit, a metering and billing unit, etc., and is used for information exchange, energy transmission, metering and billing, etc. with the electric vehicle 120.

The electric vehicle 120 may be a vehicle driven by electric energy, such as a pure electric vehicle/battery electric vehicle (pure EV/battery EV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), or a plug-in hybrid electric vehicle (PHEV).

In other embodiments, as shown in (b) of FIG. (1), the charging pile 110 is an integrated charging pile. Specifically, the charging pile 110 can directly set the human-machine interface, the charging control unit, and the metering and billing unit in the charging device 111, so that the charging pile 110 only includes the charging device 111 and at least one charging gun 113 connected to the charging device 111, but does not include the charging terminal 112. The multiple charging modules in the charging device 111 convert the AC power from the external power grid 20 into stable DC power, and then directly transmit it to the electric vehicle 120 through the charging gun 113.

FIG. 2 is a schematic diagram of an example of a charging pile 110 charging an electric vehicle 120 provided in an embodiment of the present application.

Referring to FIG. 2 , the DC plug 1131 of the charging gun 113 is connected to the multiple charging modules 1111 in the charging device 111, and the DC socket 121 of the electric vehicle 120 is connected to the power battery 122. When the DC plug 1131 is connected to the DC socket 121, the multiple charging modules 1111 output DC power to the DC socket 121 through the DC plug 1131, and the DC socket 121 transmits the received DC power to the power battery 122 through the power cable 123, so that the charging pile 110 charges the electric vehicle 120.

As described in the above background technology section, as users' requirements for the charging time of the electric vehicle 120 become higher and higher, the charging power output by the multiple charging modules 1111 to the DC socket 121 through the DC plug 1131 becomes larger and larger, that is, the charging power transmitted by the power cable 123 to the power battery 122 becomes larger and larger, so as to realize high-power charging of the electric vehicle 120 by the charging pile 110, for example, realizing super charging of the electric vehicle 120 by the charging pile 110.

However, in current practical applications, since the charging voltage is usually relatively high, the power cable 123 connected between the DC socket 121 and the power battery 122 mostly uses a high-voltage harness with an operating voltage greater than 60V. As the charging power transmitted becomes larger and larger, the heat generated by the high-voltage harness increases significantly. If the heat cannot be discharged in time, it may cause safety problems during the high-power charging of the electric vehicle 120 by the charging pile 110, thereby affecting the normal high-power charging of the electric vehicle 120.

Although the electric vehicle 120 generally has a thermal management system that can provide a certain amount of cooling for the heat dissipation of the high-voltage wiring harness. However, with the increase of charging power, for example, in the supercharging scenario, in addition to the increasing heat generated by the high-voltage wiring harness, the heat generated by the power battery 122 also increases significantly. The thermal management system needs to dissipate heat for both the high-voltage wiring harness and the power battery 122. However, the cooling capacity of the thermal management system itself is limited and may not be able to meet the heat dissipation requirements of the high-voltage wiring harness and the power battery 122 at the same time.

At present, some electric vehicles 120 have additional cooling systems to dissipate the heat of the high-voltage wiring harness connected between the DC socket 121 and the power battery 122 when the power battery 122 is charged at high power. However, the additional cooling system not only takes up space in the electric vehicle 120, but also increases the weight and manufacturing cost of the entire vehicle, and makes the development of the entire vehicle system of the electric vehicle 120 more difficult. In addition, the additional cooling system is idle in other working conditions except when the power battery 122 is charged at high power, and the utilization rate of the cooling system is low.

Based on the above content, an embodiment of the present application provides an electric vehicle, which includes at least one set of DC sockets, a liquid cooling socket, a power battery and a liquid cooling pipeline. Each set of DC sockets is connected to the power battery through a power cable, and each set of DC sockets is used to transmit the DC power output by the charging device to the power battery. The liquid cooling socket is connected to the liquid cooling pipeline, and the liquid cooling socket is used to transport the cooling medium of the external cooling system to the liquid cooling pipeline. The liquid cooling pipeline is used to dissipate heat from the power cable connected to each set of DC sockets.

In the electric vehicle provided in the embodiment of the present application, the liquid cooling pipeline can be connected to the external cooling system through the liquid cooling socket. When the power battery is charged at high power through the charging equipment, the liquid cooling pipeline can use the cooling medium provided by the external cooling system to perform liquid cooling on the power cables connected between each group of DC sockets and the power battery, so as to meet the heat dissipation requirements of the power cables when the power battery is charged at high power, thereby improving the charging safety of the electric vehicle and ensuring the normal high-power charging of the electric vehicle.

An embodiment of the present application also provides a charging pile, which includes a charging device and an external cooling system. When the charging device performs high-power charging on an electric vehicle, the external cooling system can deliver a cooling medium to the electric vehicle, so that the electric vehicle can use the received cooling medium to perform liquid cooling on a power cable connected between a DC socket and a power battery, which is beneficial to meeting the heat dissipation requirements of the power cable when the electric vehicle is charged at high power, and is beneficial to ensuring the normal high-power charging of the electric vehicle by the charging device.

The present application also provides a charging system, which includes the electric vehicle and the charging pile described above. The charging system provided by the present application is described in detail below with reference to the accompanying drawings.

It should be noted that, for ease of understanding, in the drawings provided in the embodiments of the present application, solid lines are used to represent power transmission lines, short dashed lines are used to represent pipeline connection lines, and short lines-dots are used to represent signal transmission lines.

FIG. 3 and FIG. 4 are schematic diagrams of the structure of a charging system 300 provided in an embodiment of the present application.

3 and 4 , the charging system 300 includes a charging pile 400 and an electric vehicle 500 .

It should be understood that the charging pile 400 may be a split charging pile as shown in (a) of FIG. 1 , or an integrated split charging pile as shown in (b) of FIG. 1 , and the electric vehicle 500 may be the electric vehicle 120 as shown in (a) and (b) of FIG. 1 . For ease of description and understanding, the following embodiments are described by taking the charging pile 400 as the split charging pile as shown in (a) of FIG. 1 as an example.

The charging pile 400 includes a charging device 410, an off-vehicle cooling system 420, a charging gun 430, and a liquid cooling gun 440. The charging device 410 includes a plurality of charging modules 411, the charging gun 430 includes at least one set of DC plugs 431, and the liquid cooling gun 440 includes a liquid cooling plug 441. The electric vehicle 500 includes at least one set of DC sockets 510, a power battery 520, a liquid cooling socket 530, and a liquid cooling pipeline 540.

The multiple charging modules 411 are connected to at least one set of DC plugs 431. At least one set of DC plugs 431 corresponds to at least one set of DC sockets 510. Each set of DC plugs 431 is used to connect to a corresponding set of DC sockets 510. Each set of DC sockets 510 is connected to a power battery 520 through a power cable 550.

When each set of DC plugs 431 is connected to a corresponding set of DC sockets 510 , the DC power output by the multiple charging modules 411 in the charging device 410 can be transmitted to the power battery 520 through the connected DC plugs 431 and DC sockets 510 to charge the power battery 520 .

It should be understood that in the embodiment of the present application, each set of DC plugs 431 includes a positive DC plug DC+ and a negative DC plug DC-, each set of DC sockets 510 includes a positive DC socket DC+ and a negative DC socket DC-, and the number of power cables 550 is multiple. Among them, the positive DC plug DC and the negative DC plug DC- in each set of DC plugs 431 are respectively used to connect the positive DC socket DC+ and the negative DC socket DC- in the corresponding set of DC sockets 510. The positive DC socket DC+ and the negative DC socket DC- in each set of DC sockets 510 are each connected to the power battery 520 through a power cable 550.

In an embodiment of the present application, when the charging gun 430 includes multiple sets of DC plugs 431, the multiple charging modules 411 in the charging device 410 can simultaneously output DC power to the power battery 520 of the electric vehicle 500 through the multiple sets of DC plugs 431, thereby increasing the charging power output by the multiple charging modules 411 of the charging device 410 to the power battery 520, which is conducive to realizing high-power charging of the electric vehicle 500 by the charging pile 400.

3 and 4 , the liquid cooling plug 441 is used to communicate with the liquid cooling socket 530, and the liquid cooling plug 441 is connected to the vehicle external cooling system 420, and the liquid cooling socket 530 is connected to the liquid cooling pipeline 540. The liquid cooling pipeline 540 is used to dissipate heat for the power cables 550 connected to each set of DC sockets 530.

Specifically, when the liquid cooling plug 441 is connected to the liquid cooling socket 530, the cooling medium of the external cooling system 420 can be output to the liquid cooling socket 530 through the liquid cooling plug 441, and the liquid cooling socket 530 is used to transport the received cooling medium to the liquid cooling pipeline 540, so that the liquid cooling pipeline 540 can utilize the cooling medium provided by the external cooling system 420 and the power cable 550 connected to each group of DC sockets 510 for heat exchange, thereby dissipating the heat of the power cables 550 connected to each group of DC sockets 510.

It can be understood that in the embodiment of the present application, the cooling medium can be cooling water or chilled water, etc.

It can also be understood that the external cooling system 420 can be disposed outside the charging device 410 , or the external cooling system 420 can also be integrated into the charging device 410 .

For example, in some embodiments, as shown in FIG3 , the charging device 410 includes a box (not shown in the figure), a plurality of charging modules 411 are accommodated in the box, and an external cooling system 420 is arranged outside the box. Among them, the charging gun 430 is connected to the charging terminal (not shown in the figure), and is connected to the plurality of charging modules 411 in the box through the charging terminal. The liquid cooling gun 440 can be connected to the charging terminal and communicated with the external cooling system 420 outside the box through the charging terminal; or, the liquid cooling gun 440 can also be directly connected to the external cooling system 420 outside the box.

In other embodiments, as shown in FIG4 , multiple charging modules 411 and an off-vehicle cooling system 420 are both contained in a box of a charging device 410. The charging gun 430 and the liquid cooling gun 440 are both connected to the charging terminal, and are respectively connected to the multiple charging modules 411 in the box and the off-vehicle liquid cooling system 420 through the charging terminal.

In a specific implementation, in conjunction with FIG. 3 and FIG. 4 , the electric vehicle 500 may include two vehicle interfaces, namely, a vehicle interface M1 and a vehicle interface M2, at least one set of DC sockets 510 is provided in one vehicle interface M1, and a liquid cooling socket 530 is provided in another vehicle interface M2. One vehicle interface M1 is used to connect to a charging gun 430, and the other vehicle interface M2 is used to connect to a liquid cooling gun 440.

For the incomplete details about the charging pile 400 mentioned above, please refer to the relevant description of the embodiment shown in FIG1 , which will not be repeated here.

In the embodiment of the present application, while the charging device 410 performs high-power charging to the power battery 520 of the electric vehicle 500 through the charging gun 430, the off-vehicle cooling system 420 can provide cooling medium to the liquid cooling pipeline 540 of the electric vehicle 500 through the liquid cooling gun 440, so that the liquid cooling pipeline 540 of the electric vehicle 500 can use the cooling medium provided by the off-vehicle cooling system 420 to perform liquid cooling and heat dissipation on the power cables 550 connected to each group of DC sockets 510. This is conducive to meeting the heat dissipation requirements of the power cables 550 when the electric vehicle 500 is performing high-power charging, thereby improving the charging safety of the electric vehicle 500, and ensuring that the charging device 410 performs high-power charging of the electric vehicle 500 normally.

For example, when the charging device 410 performs high-power supercharging on the electric vehicle 500, the electric vehicle 500 can use the cooling medium provided by the off-vehicle cooling system 420 to perform liquid cooling on the power cables connected to each group of DC sockets 510 to meet the heat dissipation requirements of the power cables 550 when the electric vehicle 500 is supercharged, so as to ensure that the charging device 410 performs supercharging on the electric vehicle 500 normally. Furthermore, the charging device 410 is conducive to achieving a charging speed of one kilometer per second, that is, it is conducive to charging the electric vehicle 500 with 1 kilometer of electricity in 1 second. It can be understood that supercharging can refer to the maximum output power of a single gun being greater than or equal to a preset power, and the preset power can be, for example, 250kW.

In addition, since the electric vehicle 500 uses the external cooling system 420 to dissipate heat for the power cables 550 connected to each set of DC sockets 510, there is no need to add an additional cooling system for the power cables 550 in the electric vehicle 500, which helps to avoid an increase in the weight of the entire vehicle and reduce the manufacturing cost of the electric vehicle 500 and the difficulty of developing the entire vehicle system.

Continuing with Figures 3 and 4, in some embodiments, in order to achieve the circulation of the cooling medium of the external cooling system 420 between the external cooling system 420 and the liquid cooling pipeline 540, the liquid cooling plug 441 may include a liquid inlet plug 4411 and a liquid outlet plug 4412, and the liquid cooling socket 530 may include a liquid inlet socket 531 and a liquid outlet socket 532.

The liquid inlet plug 4411 is used to communicate with the liquid outlet socket 532, and the liquid outlet plug 4412 is used to communicate with the liquid inlet socket 531. The liquid inlet plug 4411 is connected to the liquid outlet plug 4412 through the off-vehicle cooling system 420, and the liquid inlet socket 531 is connected to the liquid outlet socket 532 through the liquid cooling pipeline 540. Thus, a circulation loop is formed between the off-vehicle cooling system 420 and the liquid cooling pipeline 540, and the cooling medium of the off-vehicle cooling system 420 can flow in the circulation loop.

When the liquid inlet plug 4411 is connected to the liquid outlet socket 532, and the liquid outlet plug 4412 is connected to the liquid inlet socket 531, the cooling medium of the off-vehicle cooling system 420 flows into the liquid cooling pipeline 540 through the liquid outlet plug 4412 and the liquid inlet socket 531, and performs heat exchange with the power cables 550 connected to each set of DC sockets 510 to take away the heat generated by the power cables 550 connected to each set of DC sockets 510. The cooling medium carrying heat flows into the off-vehicle cooling system 420 again through the liquid outlet socket 532 and the liquid inlet plug 4411. The off-vehicle cooling system 420 is used to cool the cooling medium carrying heat, and the cooled cooling medium continues to flow into the liquid cooling pipeline 540 through the liquid outlet plug 4412 and the liquid inlet socket 531, so as to realize the recycling of the cooling medium.

FIG. 5 is a schematic diagram of the structure of another charging system 300 provided in an embodiment of the present application.

Different from the embodiments shown in Figures 3 and 4, in the embodiment shown in Figure 5, the charging pile 400 includes a charging device 410, an off-vehicle cooling system 420 and a charging gun 430, but does not include a liquid cooling gun 440. Among them, the charging gun 430 includes at least one set of DC plugs 431 and a liquid cooling plug 432. The multiple charging modules 411 in the charging device 410 are connected to at least one set of DC plugs 431. At least one set of DC plugs 431 corresponds to at least one set of DC sockets 510 of the electric vehicle 500, and each set of DC plugs 431 is used to connect a corresponding set of DC sockets 510. The off-vehicle cooling system 420 is connected to the liquid cooling plug 432, and the liquid cooling plug 432 is used to communicate with the liquid cooling socket 530 of the electric vehicle 500.

In a specific implementation, the electric vehicle 500 may include only one vehicle interface M1 , and at least one set of DC sockets 510 and liquid cooling sockets 530 are both arranged in one vehicle interface M1 . One vehicle interface M1 is used to connect to the charging gun 430 .

For details about the charging system 300 , please refer to the embodiments shown in FIG. 3 and FIG. 4 , which will not be described in detail here.

In the embodiment of the present application, while the charging device 410 performs high-power charging to the power battery 520 of the electric vehicle 500 through the charging gun 430, the off-vehicle cooling system 420 can also provide cooling medium to the liquid cooling pipeline 540 of the electric vehicle 500 through the charging gun 430, so that the liquid cooling pipeline 540 can use the cooling medium provided by the off-vehicle cooling system 420 to perform liquid cooling and heat dissipation on the power cable 550 connected to each group of DC sockets 510. This is conducive to meeting the heat dissipation requirements of the power cable 550 when the electric vehicle 500 is charged at high power, improving the charging safety of the electric vehicle 500, and thus ensuring that the charging device 410 performs high-power charging of the electric vehicle 500 normally.

Continuing to refer to Figure 5, in some embodiments, similar to the embodiments shown in Figures 3 and 4, in order to achieve the circulation of the cooling medium of the external cooling system 420 between the external cooling system 420 and the liquid cooling pipeline 540, the liquid cooling plug 432 may include a liquid inlet plug 4321 and a liquid outlet plug 4322, and the liquid cooling socket 530 may include a liquid inlet socket 531 and a liquid outlet socket 532.

The liquid inlet plug 4321 is used to communicate with the liquid outlet socket 532, the liquid outlet plug 4322 is used to communicate with the liquid inlet socket 531, the liquid inlet plug 4321 is connected to the liquid outlet plug 4322 through the off-vehicle cooling system 420, and the liquid inlet socket 531 is connected to the liquid outlet socket 532 through the liquid cooling pipeline 540. Thus, a circulation loop is formed between the off-vehicle cooling system 420 and the liquid cooling pipeline 540, and the cooling medium of the off-vehicle cooling system 420 can flow in the circulation loop.

For a detailed description of the circulation of the cooling medium of the off-vehicle cooling system 420 in the circulation loop, reference may be made to the embodiments shown in FIG. 3 and FIG. 4 , which will not be described in detail here.

The structures of the charging pile 400 and the electric vehicle 500 in the above-mentioned charging system 300 are further specifically introduced below.

Fig. 6 is a schematic diagram of the structure of a charging pile 400 provided in an embodiment of the present application. Fig. 7 is a schematic diagram of the coordination between the charging gun 430 shown in Fig. 6 and the vehicle exterior cooling system 420.

Referring to FIG. 6 , taking the charging pile 400 shown in FIG. 5 including the charging gun 430 but not including the liquid cooling gun 440 as an example, in some embodiments, the off-vehicle cooling system 420 is disposed in the housing of the charging device 410 and can be used to dissipate heat from the heating device on the side of the charging pile 400 , such as liquid cooling of the multiple charging modules 411 and the charging gun 430 in the charging device 410 . This is conducive to meeting the heat dissipation requirements of the charging pile 400 when supercharging the electric vehicle 500 , so that the charging device 410 is conducive to achieving a charging speed of one kilometer per second, thereby bringing users a charging experience of "a cup of coffee, full charge and departure". That is to say, the charging pile 400 can be a fully liquid-cooled supercharging charging pile.

In one example, in combination with FIG6 and FIG7 , the off-vehicle cooling system 420 is used to perform liquid cooling on the charging gun 430. The charging gun 430 further includes a charging gun head 433 and a liquid cooling cable 434. The liquid cooling cable 434 includes a liquid cooling cable outer tube 4341, a cable 4342, and a gun line liquid cooling pipeline 4343.

Among them, at least one set of DC plugs 431 and liquid cooling plugs 432 are located in the charging gun head 433. The liquid cooling cable outer tube 4341 is coated on the outer periphery of the cable 4342 and the gun line liquid cooling pipeline 4343, and the liquid cooling cable outer tube 4341 can be used to accommodate and protect the cable 4342 and the gun line liquid cooling pipeline 4343. The multiple charging modules 411 in the charging device 410 are connected to at least one set of DC plugs 431 in the charging gun head 433 through the cable 4322. The input end of the gun line liquid cooling pipeline 4343 is connected to the output end of the vehicle external cooling system 420, and the output end of the gun line liquid cooling pipeline 4343 is connected to the input end of the vehicle external cooling system 420. The outer periphery of the cable 4342 is coated with an insulating layer to insulate and protect the cable 4342. The gun line liquid cooling pipeline 4343 is coated on the outer periphery of the insulating layer.

In a specific implementation, the cooling medium in the off-vehicle cooling system 420 flows into the gun line liquid cooling pipeline 4343 through the input end of the gun line liquid cooling pipeline 4343. The cooling medium in the gun line liquid cooling pipeline 4343 exchanges heat with the cable 4342 through the insulating layer to take away the heat generated by the cable 4342, thereby realizing liquid cooling of the cable 4342. The cooling medium carrying heat flows back to the off-vehicle cooling system 420 again through the output end of the gun line liquid cooling pipeline 4343. The off-vehicle cooling system 420 is used to cool the cooling medium carrying heat, and transport the cooled cooling medium to the gun line liquid cooling pipeline 4343 again, thereby realizing the recycling of the cooling medium.

Continuing to refer to FIG. 7, in some embodiments, the charging gun 430 further includes a cooling pool 435, and the gun line liquid cooling pipeline 4343 includes a gun line liquid inlet pipeline a1 and a gun line liquid outlet pipeline a2. The cooling pool 435 is located in the charging gun head 433. The gun line liquid inlet pipeline a1 is coated on the outer periphery of the cable 4342. The input end of the gun line liquid inlet pipeline a1 serves as the input end of the gun line liquid cooling pipeline 4343, and is used to communicate with the output end of the off-vehicle cooling system 420. The output end of the gun line liquid outlet pipeline a2 serves as the output end of the gun line liquid cooling pipeline 4343, and is used to communicate with the input end of the off-vehicle cooling system 420. The output end of the gun line liquid inlet pipeline a1 is connected to the input end of the gun line liquid outlet pipeline a2 through the cooling pool 435, so that the cooling medium in the gun line liquid inlet pipeline a1 can flow into the gun line liquid outlet pipeline a2 through the cooling pool 435, and then flow into the external vehicle cooling system 420 through the gun line liquid outlet pipeline a2, thereby realizing the circulation of the cooling medium.

In one example, the cooling pool 435 can be in thermal contact with at least one group of DC plugs 431 in the charging gun head 433. In this way, when the cooling medium in the gun line liquid inlet pipeline a1 flows into the gun line liquid outlet pipeline a2 through the cooling pool 435, the cooling medium flowing in the cooling pool 435 can perform heat exchange with at least one group of DC plugs 431 in the charging gun head 433 to take away the heat generated by at least one group of DC plugs 431, thereby achieving liquid cooling of at least one group of DC plugs 431.

It should be noted that the specific structure of the above-mentioned liquid cooling cable 434 is only for illustration, and it can be flexibly adjusted according to actual production and design requirements. For example, in some other embodiments, the cable 4342 in the liquid cooling cable 434 can also surround the outer periphery of the gun line liquid cooling pipeline 4343.

In an embodiment of the present application, the external cooling system 420 can be used to dissipate heat for the power cable 550 in the electric vehicle 500, and can also be used to dissipate heat for heating devices on the charging pile 400 side, such as the charging gun 430. This can not only meet the heat dissipation requirements of the charging gun 430 during operation, but also improve the utilization rate of the external cooling system 420.

Continuing to refer to FIG6 , in some embodiments, the charging pile 400 further includes a pile end liquid inlet pipeline 451 and a pile end liquid outlet pipeline 452. The liquid inlet plug 4321 in the liquid cooling plug 432 is connected to the input end of the vehicle external cooling system 420 through the pile end liquid inlet pipeline 451, and the liquid outlet plug 4322 in the liquid cooling plug 432 is connected to the output end of the vehicle external cooling system 420 through the pile end liquid outlet pipeline 452.

For example, referring to FIG6 , the pile end liquid inlet pipeline 451 and the pile end liquid outlet pipeline 452 are arranged in the liquid cooling cable outer tube 4341, that is, the pile end liquid inlet pipeline 451 and the pile end liquid outlet pipeline 452 are integrated in the liquid cooling cable 434. In other words, the charging gun head 433 can be connected to the multiple charging modules 411 in the charging device 410 and the vehicle-outside cooling system 420 through the liquid cooling cable 434, and the connection structure is simpler and more regular.

Fig. 8 is a schematic diagram of the structure of another charging pile 400 provided in an embodiment of the present application. Fig. 9 is a schematic diagram of the coordination between the charging gun 430 shown in Fig. 8 and the pile end cooling system 460.

Different from the embodiment shown in FIG6 , in the embodiment shown in FIG8 , the charging pile 400 includes a pile end cooling system 460 in addition to the external cooling system 420. The pile end cooling system 460 is disposed in the housing of the charging device 410, and the external cooling system 420 is disposed outside the housing of the charging device 410. The pile end cooling system 460 can be used to perform liquid cooling on the heating components on the charging pile 400 side, such as liquid cooling on multiple charging modules 411 and charging guns 430 in the charging device 410.

For example, in combination with Figures 8 and 9, the input end of the gun line liquid cooling pipeline 4343 is connected to the output end of the pile end cooling system 460, and the output end of the gun line liquid cooling pipeline 4343 is connected to the input end of the pile end cooling system 460. In this way, the gun line liquid cooling pipeline 4343 can use the cooling medium provided by the pile end cooling system 460 to perform heat exchange with the cable 4342 to take away the heat generated by the cable 4342, thereby realizing liquid cooling of the cable 4342.

For a detailed description of how the pile end cooling system 460 performs liquid cooling on the cable 4342 , reference may be made to the above-mentioned description of how the off-vehicle cooling system 420 performs liquid cooling on the cable 4342 , which will not be repeated here.

In the embodiment of the present application, the charging pile 400 is provided with two independent cooling systems, namely an external cooling system 420 and a pile end cooling system 460. The power cable 550 in the electric vehicle 500 is cooled by the external cooling system 420, and the heating device on the charging pile 400 side is cooled by the pile end cooling system 460. The two cooling systems are operated independently to avoid mutual influence, which is conducive to ensuring their respective heat dissipation effects.

Continuing to refer to FIG8 , in one example, similar to the embodiment shown in FIG6 , the pile end liquid inlet pipeline 451 and the pile end liquid outlet pipeline 452 can also be arranged in the liquid cooling cable outer tube 4341, that is, the pile end liquid inlet pipeline 451 and the pile end liquid outlet pipeline 452 are integrated in the liquid cooling cable 434. In other words, the charging gun head 433 can be connected to the multiple charging modules 411 in the charging device 410, the pile end cooling system 460, and the vehicle-outside cooling system 420 outside the charging device 410 through the liquid cooling cable 434, and the connection structure is simpler and more regular.

In another example, refer to FIG. 10 , which is a schematic diagram of the structure of another charging pile 400 provided in an embodiment of the present application. Different from the embodiment shown in FIG. 8 , in the embodiment shown in FIG. 10 , the charging gun 430 also includes a pipeline cable outer tube, which is coated on the outer periphery of the pile end liquid inlet pipeline 451 and the pile end liquid outlet pipeline 452 to form a pipeline cable 436. In other words, the charging gun head 433 is connected to the multiple charging modules 411 and the pile end cooling system 460 in the charging device 410 through the liquid cooling cable 434, and is connected to the vehicle-external cooling system 420 outside the charging device 410 through the pipeline cable 436.

In this way, the two cooling systems are connected to the charging gun head 433 through different cables, which is conducive to ensuring that the heat dissipation of the power cable 550 of the electric vehicle 500 by the external cooling system 420 and the heat dissipation of the charging gun 430 by the pile end cooling system 460 are performed independently to avoid mutual influence.

The above text further introduces the specific introduction of the charging pile 400 in the charging system 300 provided in the embodiment of the present application in combination with the accompanying drawings. The structure of the electric vehicle 500 in the charging system 300 is further introduced in detail below.

11 and 12 are schematic structural diagrams of an electric vehicle 500 provided in an embodiment of the present application.

In conjunction with FIG. 11 and FIG. 12 , in some embodiments, taking the electric vehicle 500 shown in FIG. 5 as an example, which only includes one vehicle interface M1, the electric vehicle 500 includes at least one set of DC sockets 510, power batteries 520, liquid cooling sockets 530 and liquid cooling pipelines 540, and the liquid inlet socket 531 and the liquid outlet socket 532 are both arranged in the vehicle interface M1. Among them, the liquid inlet socket 531 is connected to the input end of the liquid cooling pipeline 540, the liquid outlet socket 532 is connected to the output end of the liquid cooling pipeline 540, and the liquid inlet socket 531 is used to communicate with the liquid outlet plug 4322 in the charging gun 430 shown in FIG. 5, and the liquid outlet socket 532 is used to communicate with the liquid inlet plug 4321 in the charging gun 430 shown in FIG. 5. Thus, the cooling medium of the off-vehicle cooling system 420 can flow into the liquid cooling pipeline 540 through the liquid inlet socket 531, and flow out of the liquid cooling pipeline 540 through the liquid outlet socket 531.

In addition, the liquid cooling pipeline 540 is coated on the outer periphery of the power cable 550 connected to each set of DC sockets 510; or, the power cable 550 connected to each set of DC sockets 510 surrounds the outer periphery of the liquid cooling pipeline 540. In this way, the cooling medium can perform heat exchange with the power cable 500 connected to each set of DC sockets 510 during the flow of the liquid cooling pipeline 540, so as to take away the heat generated by the power cable 550, and realize liquid cooling of the power cable 550.

For example, in some embodiments, as shown in FIG11 , the liquid cooling pipeline 540 is coated on the outer periphery of the power cable 550 connected to each set of DC sockets 510. Specifically, taking the electric vehicle 500 including a set of DC sockets 510a as an example, the DC sockets 510a include a positive DC socket DC+ and a negative DC socket DC-, and the liquid cooling pipeline 540 includes a first liquid inlet pipeline 541 and a first liquid outlet pipeline 542.

Among them, the positive DC socket DC+ is connected to the power battery 520 through the power cable 550a+, and the negative DC socket DC- is connected to the power battery 520 through the power cable 550a-. The first liquid inlet pipeline 541 is coated on the outer periphery of one of the power cables 550a+ and the power cables 550a-, and the first liquid outlet pipeline 542 is coated on the outer periphery of the other of the power cables 550a+ and the power cables 550a-. For example, FIG. 11 exemplarily shows that the first liquid inlet pipeline 541 is coated on the outer periphery of the power cable 550a+, and the first liquid outlet pipeline 542 is coated on the outer periphery of the power cable 550a-.

In addition, the output end of the first liquid inlet pipeline 541 is connected to the input end of the first liquid outlet pipeline 542, and the input end of the first liquid inlet pipeline 541 serves as the input end of the liquid cooling pipeline 540 for connecting with the liquid inlet socket 531, and the output end of the first liquid inlet pipeline 541 serves as the output end of the liquid cooling pipeline 540 for connecting with the liquid outlet socket 532.

It is understandable that the outer peripheries of the power cable 550a+ and the power cable 550a- are usually covered with an insulating layer to insulate and protect the power cable 550a+ and the power cable 550a-. The first liquid inlet pipeline 541 and the first liquid outlet pipeline 542 are covered on the outer peripheries of the insulating layer.

In the specific implementation, in combination with FIG. 5 and FIG. 11, the cooling medium of the off-vehicle cooling system 540 first flows into the first liquid inlet pipeline 541 through the liquid outlet plug 4322 and the liquid inlet socket 531. The cooling medium performs heat exchange with the power cable 550a+ connected to the positive DC socket DC+ during the flow of the first liquid inlet pipeline 541 to take away the heat generated by the power cable 550a+, thereby realizing liquid cooling and heat dissipation of the power cable 550a+. Then, the cooling medium flows into the first liquid outlet pipeline 542, and the cooling medium performs heat exchange with the power cable 550a- connected to the negative DC socket DC- during the flow of the first liquid outlet pipeline 542 to take away the heat generated by the power cable 550a-, thereby realizing liquid cooling and heat dissipation of the power cable 550a-. Finally, the cooling medium flows back to the off-vehicle cooling system 420 again through the liquid outlet socket 531 and the liquid inlet plug 4321 to take the heat generated by the power cable 550a+ and the power cable 550a- out of the electric vehicle 500.

It is understandable that the specific structure of the liquid cooling pipeline 540 covering the DC socket 510 is only for illustration. For example, in some other embodiments, when the electric vehicle 500 includes two groups of DC sockets 510, the first liquid inlet pipeline 541 can be covered on the outer periphery of the power cable 550 connected to the positive DC socket DC+ and the negative DC socket DC- of one group of DC sockets 510, and the first liquid outlet pipeline 542 is covered on the outer periphery of the power cable 550 connected to the positive DC socket DC+ and the negative DC socket DC- of the other group of DC sockets 510.

Furthermore, in one example, the electric vehicle 500 further includes a liquid cooling plate 560, and the output end of the first liquid inlet pipeline 541 is connected to the input end of the first liquid outlet pipeline 542 through the liquid cooling plate 560. Specifically, the liquid cooling plate 560 is provided with a liquid cooling channel, the inlet of the liquid cooling channel is connected to the output end of the first liquid inlet pipeline 541, and the outlet of the liquid cooling channel is connected to the input end of the first liquid outlet pipeline 542.

In the embodiment of the present application, by connecting the liquid cooling plate 560 between the first liquid inlet pipeline 541 and the first liquid outlet pipeline 542, on the one hand, the first liquid inlet pipeline 541 and the first liquid outlet pipeline 542 can be connected; on the other hand, the liquid cooling channel of the liquid cooling plate 560 is equivalent to a part of the liquid cooling pipeline 540, which is conducive to simplifying the pipeline design between the output end of the first liquid inlet pipeline 541 and the input end of the first liquid outlet pipeline 542.

It is understandable that the structure in which the output end of the first liquid inlet pipeline 541 and the input end of the first liquid outlet pipeline 542 are connected through the liquid cooling plate 560 is only for illustration. In some other embodiments, the output end of the first liquid inlet pipeline 541 and the input end of the first liquid outlet pipeline 542 may also be connected through other pipeline structures.

In some other embodiments, referring to FIG12 , the power cables 550 connected to each set of DC sockets 510 surround the outer periphery of the liquid cooling pipeline 540. Specifically, as shown in FIG12 , taking the electric vehicle 500 including a set of DC sockets 510a as an example, the DC sockets 510a include a positive DC socket DC+ and a negative DC socket DC-, and the liquid cooling pipeline 540 includes a first liquid inlet pipeline 541 and a first liquid outlet pipeline 542.

The positive DC socket DC+ is connected to the power battery 520 through the power cable 550a+, and the negative DC socket DC- is connected to the power battery 520 through the power cable 550a-. One of the power cable 550a+ and the power cable 550a- surrounds the outer periphery of the first liquid inlet pipeline 541, and the other of the power cable 550a+ and the power cable 550a- surrounds the outer periphery of the first liquid outlet pipeline 542. For example, FIG. 12 exemplarily shows that the power cable 550a+ surrounds the outer periphery of the first liquid inlet pipeline 541, and the power cable 550a- surrounds the outer periphery of the first liquid outlet pipeline 542.

In addition, the output end of the first liquid inlet pipeline 541 is connected to the input end of the first liquid outlet pipeline 542, and the input end of the first liquid inlet pipeline 541 serves as the input end of the liquid cooling pipeline 540 for connecting with the liquid inlet socket 531, and the output end of the first liquid inlet pipeline 541 serves as the output end of the liquid cooling pipeline 540 for connecting with the liquid outlet socket 532.

When the power cable 550 is wrapped around the periphery of the liquid cooling pipeline 540, the heat dissipation process of the power cable 550 by the liquid cooling pipeline 540 is similar to the heat dissipation process when the liquid cooling pipeline 540 is wrapped around the periphery of the power cable 550 as shown in the above-mentioned Figure 11. For specific description, please refer to the embodiment shown in Figure 11, which will not be repeated here.

It is understandable that the specific structure of the power cable 550 surrounding the liquid cooling pipeline 540 is only for illustration. For example, in some other embodiments, when the electric vehicle 500 includes two sets of DC sockets 510, the power cable 550 connected to the positive DC socket DC+ and the negative DC socket DC- of one set of DC sockets 510 surrounds the outer periphery of the first liquid inlet pipeline 541, and the power cable 550 connected to the positive DC socket DC+ and the negative DC socket DC- of the other set of DC sockets 510 surrounds the outer periphery of the first liquid outlet pipeline 542.

Furthermore, in one example, the electric vehicle 500 further includes a liquid cooling plate 560, and the output end of the first liquid inlet pipeline 541 is connected to the input end of the first liquid outlet pipeline 542 through the liquid cooling plate 560. For a specific description, please refer to the embodiment shown in FIG. 11, which will not be repeated here.

Fig. 13 is a schematic diagram of the structure of another electric vehicle 500 provided in an embodiment of the present application. It should be understood that the embodiment shown in Fig. 13 includes most of the technical features of the embodiments shown in Fig. 11 and Fig. 12, and the following mainly introduces the difference between the two.

Referring to FIG. 13 , in some embodiments, the electric vehicle 500 further includes at least one cooling pool 570. Each cooling pool 570 includes a liquid inlet and a liquid outlet, and the liquid inlet of each cooling pool 570 is connected to the liquid inlet socket 531, for example, the liquid inlet of the cooling pool 570 is connected to the liquid inlet socket 531 through the pipeline L1. The liquid outlet of each cooling pool 570 is connected to the input end of the liquid cooling pipeline 540. At least one cooling pool 570 is used to dissipate heat for each set of DC sockets 510.

In a specific implementation, at least one cooling pool 570 can be used to be in thermal contact with each group of DC sockets 510. Furthermore, the cooling medium of the off-vehicle cooling system 420 can first flow into the at least one cooling pool 570 through the liquid inlet socket 531. The cooling medium performs heat exchange with each group of DC sockets 510 during the flow of at least one cooling pool 570 to take away the heat generated by each group of DC sockets 510, thereby achieving liquid cooling and heat dissipation of each group of DC sockets 510. After the heat exchange is completed, the cooling medium flows from the at least one cooling pool 570 into the liquid cooling pipeline 540, for example, into the first liquid inlet pipeline 541, to continue to perform liquid cooling and heat dissipation on the power cables 550 connected to each group of DC sockets 510.

It is understandable that when the power battery 520 of the electric vehicle 500 is charged at high power, each set of DC sockets 510 will also generate heat in the process of transmitting the DC power output by the charging device 400 to the power battery 520 through the power cable 550. In the embodiment of the present application, by connecting at least one cooling pool 570 between the liquid inlet socket 531 and the input end of the liquid cooling pipeline 540, the at least one cooling pool 570 can use the cooling medium provided by the external cooling system 420 to perform liquid cooling and heat dissipation on each set of DC sockets 510, thereby better meeting the heat dissipation requirements of the electric vehicle 500 during high power charging, improving the charging safety of the electric vehicle 500, and ensuring the normal high power charging of the electric vehicle 500.

The specific structure of the thermal contact between the at least one cooling pool 570 in the electric vehicle 500 and each group of DC sockets 510 in the electric vehicle 500 mentioned above is exemplarily introduced below.

In one example, as shown in FIG. 13 , an electric vehicle 500 includes a group of DC sockets 510 a and a cooling pool 570 , and the DC socket 510 a includes a positive DC socket DC+ and a negative DC socket DC- arranged at intervals. The cooling pool 570 is located between the positive DC socket DC+ and the negative DC socket DC- along the arrangement direction of the positive DC socket DC+ and the negative DC socket DC-. In addition, the cooling pool 570 includes two outer surfaces S1 and S2 arranged opposite to each other along the arrangement direction of the positive DC socket DC+ and the negative DC socket DC-, one outer surface S1 faces the positive DC socket DC+, and the other outer surface S2 faces the negative DC socket DC-.

Among them, one outer surface S1 is used for thermal contact with the positive DC socket DC+, and the other outer surface S2 is used for thermal contact with the negative DC socket DC-. In this way, the heat generated by the positive DC socket DC+ can be transferred to the cooling medium in the cooling pool 570 through one outer surface S1 of the cooling pool 570, and the heat generated by the negative DC socket DC- can be transferred to the cooling medium in the cooling pool 570 through the other outer surface S2 of the cooling pool 570.

Further, when the electric vehicle 500 includes two groups of DC sockets 510, the electric vehicle 500 may include two cooling pools 570. The two cooling pools 570 correspond to the two groups of DC sockets 510 one by one, and each cooling pool 570 is located between the positive DC socket DC+ and the negative DC socket DC- of the corresponding group of DC sockets 510 and is in thermal contact. For a specific description, please refer to the above description that the electric vehicle 500 includes a group of DC sockets 510a and a cooling pool 570, which will not be repeated here.

In another example, refer to FIG. 14 , which is a schematic structural diagram of another example of thermal contact between at least one cooling pool 570 and each group of DC sockets 510 in an electric vehicle 500 provided by an embodiment of the present application.

As shown in FIG14 , an electric vehicle 500 includes two sets of DC sockets 510 (i.e., DC sockets 510a and 510b) and a cooling pool 570. The DC sockets 510a include a positive DC socket DC+ and a negative DC socket DC-, and the DC sockets 510b include a positive DC socket DC1+ and a negative DC socket DC1-. The liquid inlet of the cooling pool 570 is connected to the liquid inlet socket 531 through the pipeline L1, and the liquid outlet of the cooling pool 570 is connected to the input end of the liquid cooling pipeline 540, and is connected to the liquid outlet socket 532 through the output end of the liquid cooling pipeline 540.

The DC socket 510a and the DC socket 510b are arranged along a first direction, the positive DC socket DC+ and the negative DC socket DC- in the DC socket 510a are arranged along a second direction, and the positive DC socket DC1+ and the negative DC socket DC1- in the DC socket 510b are arranged along the second direction, and the second direction is perpendicular to the first direction. The cooling pool 570 is located between the DC socket 510a and the DC socket 510b along the first direction, and the cooling pool 570 includes two outer surfaces S1 and S2 arranged opposite to each other along the first direction, one outer surface S1 faces one group of DC sockets 510a, and the other outer surface S2 faces the other group of DC sockets 510b.

Among them, one outer surface S1 is used for thermal contact with the positive DC socket DC+ and the negative DC socket DC- of one group of DC sockets 510a, and the other outer surface S2 is used for thermal contact with the positive DC socket DC1+ and the negative DC socket DC1- of another group of DC sockets 510b. In this way, the heat generated by the positive DC socket DC+ and the negative DC socket DC- of one group of DC sockets 510a can be transferred to the cooling medium in the cooling pool 570 through one outer surface S1 of the cooling pool 570, and the heat generated by the positive DC socket DC1+ and the negative DC socket DC1- of another group of DC sockets 510b can be transferred to the cooling medium in the cooling pool 570 through the other outer surface S2 of the cooling pool 570.

Fig. 15 is a schematic diagram of the structure of another electric vehicle 500 provided in an embodiment of the present application. It should be understood that the embodiment shown in Fig. 15 includes most of the technical features of the embodiments shown in Figs. 11 to 14. To avoid redundancy, the following mainly describes the difference between the two.

Referring to FIG. 15 , in some embodiments, the electric vehicle 500 further includes a thermal management system 570, a second liquid inlet pipeline 581, and a second liquid outlet pipeline 582. The liquid inlet socket 531 is connected to the input end of the second liquid inlet pipeline 581, the output end of the second liquid inlet pipeline 581 is connected to the input end of the second liquid outlet pipeline 582 through the thermal management system 570, and the output end of the second liquid outlet pipeline 582 is connected to the liquid outlet socket 532. The thermal management system 570 is used to dissipate heat from the power battery 520.

In a specific implementation, in combination with FIG. 5 and FIG. 15 , the cooling medium of the off-vehicle cooling system 420 can flow into the thermal management system 570 through the liquid inlet socket 521 and the second liquid inlet pipeline 581. The cooling medium exchanges heat with the power battery 520 during the flow of the thermal management system 570 to take away the heat generated by the power battery 520 and achieve liquid cooling of the power battery 520. Afterwards, the cooling medium flows out of the electric vehicle 500 through the second liquid outlet pipeline 582 and the liquid outlet socket 532, and then flows back to the off-vehicle cooling system 420 again to take the heat generated by the power battery 520 out of the electric vehicle 500 and achieve the recycling of the cooling medium.

In the embodiment of the present application, the second liquid inlet pipeline 581 and the second liquid outlet pipeline 582 are used to connect the liquid inlet socket 531 and the liquid outlet socket 532 of the electric vehicle 500 to the thermal management system 570, so that the electric vehicle 500 can use the cooling medium provided by the external cooling system 420 to perform liquid cooling and heat dissipation on the power cables 550 connected to each group of DC sockets 510, and can also use the cooling medium provided by the external cooling system 420 to perform liquid cooling and heat dissipation on the power battery 520. This can simultaneously meet the heat dissipation requirements of the power battery 520 and the power cable 550 when the electric vehicle 500 is charged at high power, which is conducive to ensuring the normal high-power charging of the electric vehicle 500.

In some embodiments, referring to FIG. 15 , the electric vehicle 500 further includes two three-way valves 590a and 590b. The three interfaces of one of the three-way valves 590a are respectively connected to the liquid inlet socket 531, the input end of the liquid cooling pipeline 540, and the input end of the second liquid inlet pipeline 581, and the three interfaces of the other three-way valve 590b are respectively connected to the liquid outlet socket 532, the output end of the liquid cooling pipeline 540, and the output end of the second liquid outlet pipeline 582.

In this way, after the cooling medium provided by the external cooling system 420 flows into the electric vehicle 500 through the liquid inlet socket 531, it can be divided into two paths through one of the three-way valves 590a, one path flows into the liquid cooling pipeline 540 for dissipating heat for the power cables 550 connected to each set of DC sockets 510, and the other path flows into the thermal management system 570 for dissipating heat for the power battery 520. Afterwards, the cooling medium in the liquid cooling pipeline 540 and the cooling medium in the thermal management system 570 can be converged to the liquid outlet socket 532 through another three-way valve 590b, and then flow back to the external cooling system 420 through the liquid outlet socket 532, so as to realize the circulation of the cooling medium of the external cooling system 420 in the electric vehicle 500.

The above describes the specific structures of the charging pile 400 and the electric vehicle 500 in the charging system 300 provided in the embodiment of the present application in combination with the accompanying drawings. It is understandable that in actual application, the charging pile 400 and the electric vehicle 500 can first identify the connection status of the liquid cooling plug and the liquid cooling socket according to the connection confirmation circuits respectively set, so that when the liquid cooling plug and the liquid cooling socket are successfully connected, the charging device 410 can perform high-power charging to the electric vehicle 500, and the off-vehicle cooling system 420 can provide cooling medium to the electric vehicle 500 to achieve heat dissipation of the power cable 550.

The following first takes the connection between the liquid cooling socket 530 of the electric vehicle 500 and the liquid cooling plug 441 of the liquid cooling gun 440 shown in Figure 3 as an example to explain the specific way in which the charging pile 400 and the electric vehicle 500 identify the connection status of the liquid cooling plug 441 and the liquid cooling socket 530 according to their respective connection confirmation circuits.

FIG. 16 is a schematic diagram of a heat dissipation system provided in an embodiment of the present application.

Referring to FIG. 16 , the heat dissipation system includes an off-vehicle cooling system 420 and an electric vehicle 500 in the charging pile 400 shown in FIG. 3 . The liquid cooling interface shown in FIG. 16 is an interface provided on the liquid cooling gun 440 shown in FIG. 3 , and the liquid inlet plug and the liquid outlet plug in the liquid cooling interface are the liquid inlet plug 4411 and the liquid outlet plug 4412 in the liquid cooling plug 441 shown in FIG. 3 , and the vehicle interface M2 shown in FIG. 16 is another vehicle interface M2 shown in FIG. 3 , and the liquid inlet socket and the liquid outlet socket in the vehicle interface M2 are the liquid inlet socket 531 and the liquid outlet socket 532 in the liquid cooling socket 530 shown in FIG. 3 .

In some embodiments, in combination with FIG. 3 and FIG. 16 , the liquid cooling gun 440 further includes a liquid cooling connection confirmation plug and a liquid cooling connection confirmation circuit connected to the liquid cooling connection confirmation plug, and the liquid cooling connection confirmation plug is disposed in the liquid cooling interface shown in FIG. 16 . The electric vehicle 500 further includes a liquid cooling connection confirmation socket and a liquid cooling connection confirmation circuit connected to the liquid cooling connection confirmation socket, and the liquid cooling connection confirmation socket is disposed in the vehicle interface M2 shown in FIG. 16 . The liquid cooling connection confirmation socket is used to connect the liquid cooling connection confirmation plug of the liquid cooling gun 440 .

In a specific implementation, as shown in FIG16 , when the vehicle interface M2 of the electric vehicle 500 is connected to the liquid cooling interface of the liquid cooling gun 440, that is, when the liquid cooling socket is connected to the liquid cooling plug and the liquid cooling connection confirmation socket is connected to the liquid cooling connection confirmation plug, the liquid cooling connection confirmation circuit in the electric vehicle 500 forms a current loop through the liquid cooling connection confirmation circuit connected by the liquid cooling connection confirmation socket and the liquid cooling connection confirmation plug.

The electric vehicle 500 is used to determine the connection status of the liquid cooling socket and the liquid cooling plug according to the voltage of at least one detection point in the liquid cooling connection confirmation circuit of the electric vehicle 500. The electric vehicle 500 is used to confirm that the liquid cooling socket and the liquid cooling plug are successfully connected when the voltage of each detection point in the at least one detection point reaches a vehicle-side preset value, that is, to determine that the liquid inlet socket and the liquid outlet plug, and the liquid outlet socket and the liquid inlet plug are successfully connected.

Correspondingly, when the vehicle interface M2 of the electric vehicle 500 is connected to the liquid cooling interface of the liquid cooling gun 440, that is, when the liquid cooling socket is connected to the liquid cooling plug and the liquid cooling connection confirmation socket is connected to the liquid cooling connection confirmation plug, the liquid cooling connection confirmation circuit in the liquid cooling gun 440 forms a current loop through the liquid cooling connection confirmation circuit connected by the liquid cooling connection confirmation plug and the liquid cooling connection confirmation socket.

The charging pile 400 is used to determine the connection status of the liquid cooling plug and the liquid cooling socket according to the voltage of the detection point in the liquid cooling connection confirmation circuit of the liquid cooling gun 440. The charging pile 400 is used to confirm that the liquid cooling plug and the liquid cooling socket are successfully connected when the voltage of the above detection point reaches the preset value of the pile end, that is, to determine that the liquid inlet socket and the liquid outlet plug, and the liquid outlet plug and the liquid inlet plug are successfully connected.

In the embodiment of the present application, when the vehicle interface M2 of the electric vehicle 500 is connected to the liquid cooling interface of the liquid cooling gun 440, the liquid cooling connection confirmation circuit in the electric vehicle 500 and the liquid cooling connection confirmation circuit in the liquid cooling gun 440 form a loop, and the electric vehicle 500 and the charging pile 400 can judge the connection state of the liquid cooling socket in the vehicle interface M2 and the liquid cooling plug in the liquid cooling interface according to the voltage of the detection point in their respective liquid cooling connection confirmation circuits. Furthermore, when the liquid cooling socket is successfully connected to the liquid cooling plug, when the charging device 410 in the charging pile 400 performs high-power charging on the electric vehicle 500, the vehicle-outside cooling system 420 in the charging pile 400 can transmit the cooling medium to the liquid cooling pipeline 540 of the electric vehicle 500, so as to realize the heat dissipation of the power cable 550 by the liquid cooling pipeline 540. This is conducive to meeting the heat dissipation requirements of the power cable 550 when the electric vehicle 500 is charged at high power, thereby improving the charging safety of the electric vehicle 500 and ensuring the normal high-power charging of the electric vehicle 500 by the charging device 410.

In conjunction with the accompanying drawings, the specific circuit form of the liquid cooling connection confirmation circuit in the electric vehicle 500 and the strategy for the electric vehicle 500 to determine the connection status of the liquid cooling socket and the liquid cooling plug are first introduced.

It should be understood that the execution entity of the electric vehicle 500 described below for determining the connection status of the liquid cooling socket and the liquid cooling plug may be, for example, a vehicle controller in the electric vehicle 500 .

FIG. 17 is a schematic diagram of the structure of a heat dissipation system provided in an embodiment of the present application.

Referring to FIG. 17 , in some embodiments, the liquid cooling connection confirmation socket includes a first liquid cooling connection confirmation socket (i.e., the CC2 socket in the vehicle interface M2 shown in FIG. 17 ). The liquid cooling connection confirmation circuit in the electric vehicle 500 includes a first liquid cooling connection confirmation circuit, and the first liquid cooling connection confirmation circuit includes a first resistor unit, and the first resistor unit includes, for example, a resistor R5. The first liquid cooling connection confirmation socket is connected to the voltage source U2 through the first resistor unit.

Among them, the liquid cooling connection confirmation circuit in the electric vehicle 500 includes a detection point, which is located between the first resistance unit and the first liquid cooling connection confirmation socket, that is, the detection point can be the detection point 2 shown in Figure 17 located between the resistor R5 and the first liquid cooling connection confirmation socket.

When the vehicle interface M2 of the electric vehicle 500 is not connected to the liquid cooling interface of the liquid cooling gun 440, since the detection point 2 is connected to the voltage source U2, the voltage of the detection point 2 should be the voltage output by the voltage source U2. Only when the vehicle interface M2 of the electric vehicle 500 is connected to the liquid cooling interface of the liquid cooling gun 440, that is, when the liquid cooling connection confirmation socket is connected to the liquid cooling connection confirmation plug, the voltage source U2 forms a loop through the resistor R5, the resistor R3 in the liquid cooling connection confirmation circuit of the liquid cooling gun 440, and the ground wire. In this loop, due to the resistance voltage division, the voltage of the detection point 2 will reach the corresponding vehicle-side preset value.

For example, the voltage output by the voltage source U2 is set to 12V, and the resistance values of the resistors R3 and R5 are equal, then the vehicle-side preset value corresponding to the detection point 2 is 6V. Under this design, if the voltage at the detection point 2 reaches 6V, the electric vehicle 500 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected.

For another example, the voltage output by the voltage source U2 is still set to 12V, but the resistance values of the resistors R3 and R5 are different, such as the resistor R3 is 2Ω and the resistor R5 is 4Ω, then the vehicle-side preset value corresponding to the detection point 2 is 4V. Under this design, if the voltage at the detection point 2 reaches 4V, the electric vehicle 500 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected.

Therefore, based on the above analysis, when the voltage at detection point 2 is the voltage output by voltage source U2, electric vehicle 500 can recognize that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at detection point 2 reaches the corresponding vehicle-side preset value, electric vehicle 500 can recognize that the liquid cooling socket is successfully connected to the liquid cooling plug.

In the embodiment of the present application, since the detection point in the liquid cooling connection confirmation circuit of the electric vehicle 500 is connected to the voltage source in the electric vehicle 500, when the voltage at the detection point is the voltage output by the voltage source, the electric vehicle 500 recognizes that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at the detection point reaches the vehicle-side preset value, the electric vehicle 500 recognizes that the liquid cooling socket is successfully connected to the liquid cooling plug. By identifying the connection status of the liquid cooling socket and the liquid cooling plug based on the voltage at the detection point, the accuracy of the electric vehicle 500 in identifying the connection status of the liquid cooling socket and the liquid cooling plug can be improved.

FIG. 18 is a schematic diagram of the structure of another heat dissipation system provided in an embodiment of the present application.

Referring to FIG. 18 , in some embodiments, the electric vehicle further includes a grounding socket (i.e., the PE socket in the vehicle interface M2 shown in FIG. 18 ), wherein the grounding socket is connected to the vehicle body ground platform, and the grounding socket is used to connect the grounding plug in the liquid cooling gun 440 (i.e., the PE in the liquid cooling interface shown in FIG. 18 ). The liquid cooling connection confirmation socket further includes a second liquid cooling connection confirmation socket (i.e., the CC1 socket in the vehicle interface M2 shown in FIG. 18 ). The liquid cooling connection confirmation circuit in the electric vehicle 500 further includes a second liquid cooling connection confirmation circuit, and the second liquid cooling connection confirmation circuit includes a second resistor unit, and the second resistor unit includes, for example, a resistor R4. The second liquid cooling connection confirmation socket is connected to the vehicle body ground platform through the second resistor unit.

The liquid cooling connection confirmation circuit in the electric vehicle 500 includes two detection points, one detection point is located between the first resistance unit and the first liquid cooling connection confirmation socket, and the other detection point is located between the second resistance unit and the second liquid cooling connection confirmation socket. That is, one detection point may be detection point 2 located between the resistor R5 and the first liquid cooling connection confirmation socket as shown in FIG. 18, and the other detection point may be detection point 3 located between the resistor R4 and the second liquid cooling connection confirmation socket as shown in FIG. 18.

When the vehicle interface M2 of the electric vehicle 500 is not connected to the liquid cooling interface of the liquid cooling gun 440, the voltage at the detection point 3 should be 0V because the detection point 3 is connected to the vehicle body ground platform. Only when the vehicle interface of the electric vehicle 500 is connected to the liquid cooling interface of the liquid cooling gun 440, the voltage source U1 in the charging pile 400 forms a loop through the resistor R1, the resistor R4 in the electric vehicle 400, and the ground wire. In this loop, due to the resistor voltage division, the voltage at the detection point 3 will reach the corresponding vehicle-side preset value.

For example, the voltage output by the voltage source U1 is set to 12V, and the resistance values of the resistors R1 and R4 are equal, then the vehicle-side preset value corresponding to the detection point 3 is 6V. Under this design, if the voltage at the detection point 3 reaches 6V, the electric vehicle 500 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected.

For another example, the voltage output by the voltage source U1 is still set to 12V, but the resistance values of the resistors R1 and R4 are different, such as R1 is 2Ω and R4 is 4Ω, then the vehicle-side preset value corresponding to the detection point 3 is 8V. Under this design, if the voltage at the detection point 3 reaches 8V, the electric vehicle 500 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected.

For the relevant description of detection point 2, please refer to the embodiment shown in Figure 17, which will not be repeated here.

Based on the above analysis, when the voltage at detection point 2 is the voltage output by voltage source U2 and the voltage at detection point 3 is 0V, the electric vehicle 500 can recognize that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at detection point 2 reaches the corresponding vehicle-side preset value and the voltage at detection point 3 reaches the corresponding vehicle-side preset value, the electric vehicle 500 can recognize that the liquid cooling socket is successfully connected to the liquid cooling plug.

In an embodiment of the present application, by setting two detection points in the liquid cooling connection confirmation circuit of the electric vehicle 500, and allowing the electric vehicle 500 to identify the connection status of the liquid cooling socket and the liquid cooling plug according to the voltages of the two detection points, the accuracy of the electric vehicle 500 in identifying the connection status of the liquid cooling socket and the liquid cooling plug can be further improved.

FIG. 19 is a schematic diagram of the structure of another heat dissipation system provided in an embodiment of the present application.

Different from the embodiment shown in FIG. 18 , in the embodiment shown in FIG. 19 , the first resistance unit includes a resistor R5 and a switch Sv, and the second resistance unit includes R4, R4′, R4″ and switches S2, S2′. At this time, the liquid cooling connection confirmation circuit in the electric vehicle 500 still includes two detection points, one detection point is located between the first resistance unit and the first liquid cooling connection confirmation socket, and the other detection point is located between the second resistance unit and the second liquid cooling connection confirmation socket. That is, one detection point may be detection point 2 shown in FIG. 19 , which is located between the switch Sv and the first liquid cooling connection confirmation socket, and the other detection point may be detection point 3 shown in FIG. 19 , which is located between the resistor R4 and the second liquid cooling connection confirmation socket. The specific identification process is similar to that of FIG. 18 , and will not be repeated here to avoid repetition.

It is understandable that in some embodiments, the electric vehicle 500 can determine the connection status of the liquid cooling socket and the liquid cooling plug only based on the voltage of the detection point 3. The specific judgment process has been described in the above embodiment and will not be repeated here.

The above introduces different embodiments of the electric vehicle 500 for determining the connection status of the liquid cooling socket and the liquid cooling plug from the perspective of the electric vehicle 500. The following introduces the specific circuit form of the liquid cooling connection confirmation circuit in the liquid cooling gun 440 and the strategy of the charging pile 400 for determining the connection status of the liquid cooling plug and the liquid cooling socket from the perspective of the charging pile 400.

It should be understood that the execution subject of the following charging pile 400 to determine the connection status of the liquid cooling plug and the liquid cooling socket may be, for example, a liquid cooling controller in the vehicle exterior cooling system 420. In specific implementation, the liquid cooling controller may be separately provided in the vehicle exterior cooling system 420, or the liquid cooling controller may be integrated with the charging controller in the charging device 410.

Continuing to refer to FIG. 17 , in some embodiments, the liquid cooling connection confirmation plug includes a first liquid cooling connection confirmation plug (i.e., the CC2 plug in the liquid cooling interface shown in FIG. 17 ) and a second liquid cooling connection confirmation plug (i.e., the CC1 plug in the liquid cooling interface shown in FIG. 17 ). The liquid cooling connection confirmation circuit in the liquid cooling gun 440 includes a third resistor unit, and the third resistor unit, for example, includes a resistor R1. The second liquid cooling connection confirmation plug is connected to the voltage source U1 through the third resistor unit. Among them, the detection point of the liquid cooling connection confirmation circuit in the liquid cooling gun 440 is located between the third resistor unit and the second liquid cooling connection confirmation plug, that is, the detection point can be the detection point 1 shown in FIG. 17 .

When the vehicle interface M2 of the electric vehicle 500 is not connected to the liquid cooling interface of the liquid cooling gun 440, since the detection point 1 is connected to the voltage source U1, the voltage of the detection point 1 should be the voltage output by the voltage source U1. Only when the vehicle interface of the electric vehicle 500 is connected to the liquid cooling interface of the liquid cooling gun 440, the voltage source U1 forms a loop through the resistor R1, the resistor R4 in the electric vehicle 500, and the ground wire. In this loop, due to the resistor voltage division, the voltage of the detection point 1 will reach the corresponding pile end preset value.

For example, the voltage output by the voltage source U1 is set to 12V, and the resistance values of the resistors R1 and R4 are equal, then the preset value of the pile end corresponding to the detection point 1 is 6V. Under this design, if the voltage of the detection point 1 reaches 6V, the charging pile 400 recognizes that the liquid cooling socket and the liquid cooling plug are in a successful connection state.

For another example, the voltage output by the voltage source U1 is still set to 12V, but the resistance values of the resistors R1 and R4 are different, such as the resistor R1 is 2Ω and the resistor R4 is 4Ω, then the pile end preset value corresponding to the detection point 1 is 8V. Under this design, if the voltage at the detection point 1 reaches 8V, the charging pile 400 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected.

Based on the above analysis, when the voltage at detection point 1 is the voltage output by voltage source U1, charging pile 400 can identify that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at detection point 1 reaches the corresponding pile end preset value, charging pile 400 can identify that the liquid cooling socket is successfully connected to the liquid cooling plug.

The liquid cooling connection confirmation circuit in the liquid cooling gun 440 shown in Figure 18 is similar to that shown in Figure 17. The specific process of the charging pile 400 identifying the connection status of the liquid cooling socket and the liquid cooling plug can be found in the relevant description of the embodiment shown in Figure 17, which will not be repeated here.

Referring to FIG. 19, in some embodiments, the third resistor unit of the liquid cooling connection confirmation circuit in the liquid cooling gun 440 includes R1, resistor R1', switch S1 and switch S0. At this time, the detection point of the liquid cooling connection confirmation circuit in the liquid cooling gun 440 is still located between the third resistor unit and the second liquid cooling connection confirmation plug, that is, the detection point can be the detection point 1 shown in FIG. 19. The specific process of the charging pile 400 identifying the connection status of the liquid cooling socket and the liquid cooling plug can be referred to the relevant description of the embodiment shown in FIG. 17, which will not be repeated here.

The above text introduces how the electric vehicle 500 and the charging pile 400 judge the connection status of the liquid-cooled plug and the liquid-cooled socket. In actual application, in addition to judging the connection status of the liquid-cooled socket and the liquid-cooled plug, the electric vehicle 500 and the charging pile 400 can also judge the connection status of the DC socket and the DC plug.

It should be noted that, for determining the connection status of the DC socket and the DC plug, reference may be made to the relevant standard contents. The following will briefly introduce the electric vehicle 500 and the charging pile 400 determining the connection status of the DC plug and the DC socket in conjunction with the accompanying drawings.

FIG20 is a schematic diagram of the structure of a charging system 300 provided in an embodiment of the present application. The charging interface shown in FIG20 is an interface provided on the charging gun 430 shown in FIG3 , and the charging interface includes a positive DC plug DC+ and a negative DC plug DC- of a set of DC plugs 431 . The vehicle interface M1 shown in FIG20 is a vehicle interface M1 shown in FIG3 , and the vehicle interface M1 includes a positive DC socket DC+ and a negative DC socket DC- of a set of DC sockets 510 .

In some embodiments, in combination with FIG. 3 and FIG. 20 , the charging gun 430 further includes a charging connection confirmation plug and a charging connection confirmation circuit connected to the charging connection confirmation plug, and the charging connection confirmation plug is disposed in the charging interface shown in FIG. 20 . The electric vehicle 500 further includes a charging connection confirmation socket and a charging connection confirmation circuit connected to the charging connection confirmation socket, and the charging connection confirmation socket is disposed in the vehicle interface M1 shown in FIG. 20 . The charging connection confirmation socket is used to connect the charging connection confirmation plug of the charging gun 430 .

The electric vehicle 500 is used to determine the connection status of the DC socket and the DC plug according to the voltage of the detection point in the charging connection confirmation circuit of the electric vehicle 500, and the charging pile is used to determine the connection status of the DC socket and the DC plug according to the voltage of the detection point in the charging connection confirmation circuit of the charging gun 430.

Specifically, referring to Fig. 20, the electric vehicle 500 can determine the connection state between the DC plug and the DC socket by the voltage at the detection point 2. The charging pile 400 can determine the connection state between the DC plug and the DC socket by the voltage at the detection point 1.

When the vehicle interface M1 of the electric vehicle 500 is not connected to the charging interface of the charging gun 430, since the detection point 2 is connected to the voltage source U2 and the detection point 1 is connected to the voltage source U1, the voltage at the detection point 2 should be the voltage output by the voltage source U2, and the voltage at the detection point 1 should be the voltage output by the voltage source U1. Only when the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, when the DC plug and the DC socket are connected, the voltage source U2 forms a loop through the resistor R5 in the electric vehicle 500, the resistor R3 in the charging connection confirmation circuit of the charging gun 430, and the grounding wire, and the voltage source U1 forms a loop through the resistor R1, the resistor R4 and the grounding wire in the electric vehicle 500. Because of the resistor voltage division, the voltage at the detection point 2 will be a preset value between 0 and U2, and the voltage at the detection point 1 will be a preset value between 0 and U1.

For example, the voltage output by the voltage source U1 and the voltage source U2 is set to 12V, the resistance values of the resistors R1 and R4 are equal, and the resistance values of the resistors R3 and R5 are equal. Under this design, if the voltage at the detection point 2 reaches 6V, the electric vehicle 500 recognizes that the DC socket and the DC plug are successfully connected. If the voltage at the detection point 1 reaches 6V, the charging pile 400 recognizes that the DC socket and the DC plug are successfully connected.

It should be understood that the numerical values shown in the above embodiments are only for illustration, and the specific values of the voltage source and the resistance may refer to the relevant standards.

Based on this, the above describes the specific way in which the electric vehicle 500 and the charging pile 400 determine the connection status of the DC socket and the DC plug, and the connection status of the liquid cooling socket and the liquid cooling plug according to the connection confirmation circuits respectively provided. The following will describe the connection sequence of each plug in the liquid cooling interface of the liquid cooling gun 440 and each socket in the vehicle interface M2 of the electric vehicle 500 during the connection process.

FIG. 21 is a schematic diagram of an interface between a liquid cooling interface of a liquid cooling gun 440 and a vehicle interface M2 of an electric vehicle 500 provided in an embodiment of the present application.

Among them, the I socket and O socket in the vehicle interface M2 are the liquid inlet socket 531 and the liquid outlet socket 532 in the liquid cooling socket 530 shown in FIG3 , the CC1 socket in the vehicle interface M2 is the second liquid cooling connection confirmation socket mentioned above, the CC2 socket in the vehicle interface M2 is the first liquid cooling connection confirmation socket mentioned above, and the PE socket in the vehicle interface M2 is the grounding socket mentioned above. Correspondingly, the I plug and O plug in the liquid cooling interface are the liquid outlet plug 4412 and the liquid inlet plug 4411 in the liquid cooling plug 441 shown in FIG3 , the CC1 plug in the liquid cooling interface is the second liquid cooling connection confirmation plug mentioned above, the CC2 plug in the liquid cooling interface is the first liquid cooling connection confirmation plug mentioned above, and the PE plug in the liquid cooling interface is the grounding plug mentioned above.

Referring to FIG. 21 , in some embodiments, the electric vehicle 500 further includes an interface housing, which is sleeved on the periphery of the liquid cooling socket (i.e., the liquid inlet socket and the liquid outlet socket) and the liquid cooling connection confirmation socket to form the vehicle interface M2. Accordingly, the liquid cooling gun 440 further includes a liquid cooling interface housing, which is sleeved on the periphery of the liquid cooling plug (i.e., the liquid inlet plug and the liquid outlet plug) and the liquid cooling connection confirmation plug to form a liquid cooling interface.

In some embodiments, the distance d2' between the end face of the first liquid-cooled connection confirmation socket (CC2 socket) and the end face of the interface shell is greater than the distance between the end face of the liquid-cooled socket and the end face of the interface shell. The distance d2 between the end face of the first liquid-cooled connection confirmation plug (CC2 plug) and the end face of the liquid-cooled interface shell is greater than the distance between the end face of the liquid-cooled plug and the end face of the liquid-cooled interface shell.

Among them, the end face of the interface shell is the end face of the interface shell facing the outside of the body of the electric vehicle 500, the end face of the first liquid cooling connection confirmation socket (CC2 socket) is the end face of the first liquid cooling connection confirmation socket (CC2 socket) facing the outside of the body of the electric vehicle 500, and the end face of the liquid cooling socket is the end face of the liquid cooling socket facing the outside of the body of the electric vehicle. Correspondingly, the end face of the liquid cooling interface shell is the end face of the liquid cooling interface shell facing the outside of the liquid cooling gun 440, the end face of the first liquid cooling connection confirmation plug (CC2 plug) is the end face of the first liquid cooling connection confirmation plug (CC2 plug) facing the outside of the liquid cooling gun 440, and the end face of the liquid cooling plug is the end face of the liquid cooling plug facing the outside of the liquid cooling gun 440.

It can be understood that in the embodiment of the present application, since the distance between the end face of the liquid inlet socket (I socket) and the end face of the interface shell, and the distance between the end face of the liquid outlet socket (O socket) and the end face of the interface shell are equal and both are d0', the distance between the end face of the liquid cooling socket and the end face of the interface shell can be understood as d0'. Correspondingly, since the distance between the end face of the liquid inlet plug (O plug) and the end face of the liquid cooling interface shell, and the distance between the end face of the liquid outlet plug (I plug) and the end face of the liquid cooling interface shell are equal and both are d0, the distance between the end face of the liquid cooling plug and the end face of the liquid cooling interface shell can be understood as d0. That is to say, in the above embodiment, d2'＞d0', d2＞d0.

In combination with the electric vehicle 500 shown in FIG17 , the connection state of the liquid cooling socket and the liquid cooling plug is identified according to the first liquid cooling connection confirmation socket (CC2 socket) and the first liquid cooling connection confirmation plug (CC2 plug). Based on the above design, in the process of connecting the liquid cooling interface of the liquid cooling gun 440 to the vehicle interface M2 of the electric vehicle 500, the liquid cooling socket in the liquid cooling interface is first connected to the liquid cooling plug in the vehicle interface M2, that is, the liquid inlet plug (O plug) is first connected to the liquid outlet socket (O socket), and the liquid outlet plug (I plug) is first connected to the liquid inlet socket (I socket), and then, the first liquid cooling connection confirmation socket (CC2 socket) in the liquid cooling interface is connected to the first liquid cooling connection confirmation plug (CC2 plug) in the vehicle interface M2. This is conducive to realizing that when the charging device 410 in the charging pile 400 charges the electric vehicle 500 with high power, the vehicle-outside cooling system 420 in the charging pile 400 dissipates heat from the power cable 550 of the electric vehicle 500.

This is because, if the first liquid-cooled connection confirmation socket (CC2 socket) is connected to the first liquid-cooled connection confirmation plug (CC2 plug) first, and the liquid-cooled socket is connected to the liquid-cooled plug later, it is possible that the first liquid-cooled connection confirmation socket (CC2 socket) and the first liquid-cooled connection confirmation plug (CC2 plug) are already connected, but the liquid-cooled socket is not connected to the liquid-cooled plug. This may cause the connection state of the liquid-cooled socket and the liquid-cooled plug confirmed by the first liquid-cooled connection confirmation circuit connected to the first liquid-cooled connection confirmation socket of the electric vehicle 500 to be incorrect, thereby causing a leakage problem between the liquid-cooled socket and the liquid-cooled plug. Therefore, in the implementation of this application, by designing the liquid-cooled socket to be connected to the liquid-cooled plug first, and the first liquid-cooled connection confirmation socket to be connected to the first liquid-cooled connection confirmation plug later, it is helpful to avoid the above-mentioned leakage problem caused by the electric vehicle 500 misjudging the connection state of the liquid-cooled socket and the liquid-cooled plug.

Further, in some embodiments, the distance d1' between the end face of the second liquid-cooled connection confirmation socket (CC1 socket) and the end face of the interface shell is greater than the distance d0' between the end face of the liquid-cooled socket and the end face of the interface shell. The distance d1 between the end face of the second liquid-cooled connection confirmation plug (CC1 plug) and the end face of the liquid-cooled interface shell is greater than the distance d0 between the end face of the liquid-cooled plug and the end face of the liquid-cooled interface shell. Among them, the end face of the second liquid-cooled connection confirmation socket is the end face of the second liquid-cooled connection confirmation socket facing the outside of the body of the electric vehicle 500, and the end face of the second liquid-cooled connection confirmation plug is the end face of the second liquid-cooled connection confirmation plug facing the outside of the liquid-cooling gun 440.

In combination with the electric vehicle 500 shown in FIG18 , the connection status of the liquid cooling socket and the liquid cooling plug is identified according to the first liquid cooling connection confirmation socket (CC2 socket) and the first liquid cooling connection confirmation plug (CC2 plug), and the second liquid cooling connection confirmation socket (CC1 socket) and the second liquid cooling connection confirmation plug (CC1 plug). Based on the above design, in the process of connecting the liquid cooling interface with the vehicle interface, the liquid cooling socket and the liquid cooling plug are connected first, and the first liquid cooling connection confirmation socket (CC2 socket) and the first liquid cooling connection confirmation plug (CC2 plug), and the second connection confirmation socket (CC2 socket) and the second connection confirmation plug (CC2 plug) are connected later, which is also conducive to avoiding the leakage problem caused by the electric vehicle 500 misjudging the connection status of the liquid cooling socket and the liquid cooling plug. For a specific description, please refer to the above-mentioned description of the liquid cooling socket and the liquid cooling plug being connected first, and the first liquid cooling connection confirmation socket and the first liquid cooling connection confirmation plug being connected later, which will not be repeated here.

Continuing to refer to FIG. 21, in one embodiment, the distance d2' between the end face of the first liquid-cooled connection confirmation socket (CC2 socket) and the end face of the interface shell is greater than the distance d1' between the end face of the second liquid-cooled connection confirmation socket (CC1 socket) and the end face of the interface shell. The distance d2 between the end face of the first liquid-cooled connection confirmation plug (CC2 plug) and the end face of the liquid-cooled interface shell is greater than the distance d1 between the end face of the second liquid-cooled connection confirmation plug (CC1 plug) and the end face of the liquid-cooled interface shell, that is, d2'>d1', d2>d1.

In combination with the electric vehicle 500 shown in Figure 17, which identifies the connection status of the liquid-cooled socket and the liquid-cooled plug according to the first liquid-cooled connection confirmation socket (CC2 socket) and the first liquid-cooled connection confirmation plug (CC2 plug), and the charging pile 400 identifies the connection status of the liquid-cooled socket and the liquid-cooled plug according to the second liquid-cooled connection confirmation socket (CC1 socket) and the second liquid-cooled connection confirmation plug (CC1 plug), based on the above design, in the process of connecting the liquid-cooled interface with the vehicle interface M2, the second liquid-cooled connection confirmation socket and the second liquid-cooled connection confirmation plug are connected first, and the first liquid-cooled connection confirmation socket and the first liquid-cooled connection confirmation plug are connected later, which is equivalent to the electric vehicle 500 performing the final complete connection confirmation of the liquid-cooled socket and the liquid-cooled plug, thereby helping to improve the efficiency of connection status confirmation.

This is because after completing the final full connection confirmation of the liquid-cooled socket and the liquid-cooled plug, the electric vehicle 500 needs to send a message requesting charging power to the charging pile 400, and the size of the charging power is determined by the electric vehicle 500. When the liquid-cooled socket and the liquid-cooled plug are successfully connected, the electric vehicle 500 sends a message requesting a larger charging power to the charging pile 400, and when the liquid-cooled socket and the liquid-cooled plug are not connected, the electric vehicle 500 sends a message requesting a smaller charging power to the charging pile 400. If the charging pile 400 performs the final full connection confirmation, the charging pile 400 needs to send a message indicating that the charging pile 400 has completed the final full connection confirmation to the electric vehicle 500, and the electric vehicle 500 sends a message requesting charging power to the charging pile 400 after receiving the message. In this case, the charging pile 500 needs to wait until the communication socket (S+ socket and S- socket) in the vehicle interface M2 and the communication plug (S+ plug and S- plug) in the liquid cooling interface are successfully connected before sending the message, thereby increasing the message sending delay and reducing the efficiency of connection status confirmation.

In the embodiment of the present application, by designing the electric vehicle 500 to perform the final full connection confirmation of the liquid-cooled socket and the liquid-cooled plug, the electric vehicle 500 does not need to wait for the message sent by the charging pile 400 indicating that the charging pile 400 has completed the final full connection confirmation. Instead, after completing the final full connection confirmation, the electric vehicle 500 directly sends a message requesting charging power to the charging pile 400, which is beneficial to improving the efficiency of confirming the electrical connection status.

It is understandable that the distance design of the above-mentioned sockets and plugs is only for illustration, and it can be flexibly adjusted according to actual production and design requirements. For example, in some other embodiments, the distance d2' between the end face of the first liquid-cooled connection confirmation socket (CC2 socket) and the end face of the interface shell is equal to the distance d1' between the end face of the second liquid-cooled connection confirmation socket (CC1 socket) and the end face of the interface shell. The distance d2 between the end face of the first liquid-cooled connection confirmation plug (CC2 plug) and the end face of the liquid-cooled interface shell is greater than the distance d1 between the end face of the second liquid-cooled connection confirmation plug (CC1 plug) and the end face of the liquid-cooled interface shell, that is, d2'=d1', d2＞d1. Based on the above design, in the process of connecting the liquid-cooled interface with the vehicle interface M2, it is also possible to achieve that the second connection confirmation socket is connected to the second connection confirmation plug first, and the first connection confirmation socket is connected to the first connection confirmation plug later, which is equivalent to the electric vehicle 500 performing the final full connection confirmation.

Alternatively, the distance d2' between the end face of the first liquid-cooled connection confirmation socket (CC2 socket) and the end face of the interface shell is greater than the distance d1' between the end face of the second liquid-cooled connection confirmation socket and the end face of the interface shell. The distance d2 between the end face of the first liquid-cooled connection confirmation plug and the end face of the liquid-cooled interface shell is equal to the distance d1 between the end face of the second liquid-cooled connection confirmation plug (CC1 plug) and the end face of the liquid-cooled interface shell, that is, d2'＞d1', d2＝d1. Based on the above design, in the process of connecting the liquid-cooling interface with the vehicle interface M2, it is also possible to achieve that the second connection confirmation socket is connected to the second connection confirmation plug first, and the first connection confirmation socket is connected to the first connection confirmation plug later, which is equivalent to the electric vehicle 500 performing the final complete connection confirmation.

In the above, taking the connection between the liquid cooling socket 530 of the electric vehicle 500 shown in Figure 3 and the liquid cooling plug 441 of the liquid cooling gun 440 as an example, the specific method for the charging pile 400 and the electric vehicle 500 to identify the connection status of the liquid cooling plug 441 and the liquid cooling socket 530 is described. In the following, taking the connection between the liquid cooling socket 530 of the electric vehicle 500 and the liquid cooling plug 432 of the charging gun 430 shown in Figure 5 as an example, the specific method for the charging pile 400 and the electric vehicle 500 to identify the connection status of the liquid cooling plug 432 and the liquid cooling socket 530 according to the connection confirmation circuits respectively provided is described.

FIG. 22 is a schematic diagram of the structure of a charging system 300 provided in an embodiment of the present application.

The charging interface shown in FIG22 is an interface provided on the charging gun 430 shown in FIG5 , a set of DC plugs in the charging interface is a set of DC plugs 431 shown in FIG5 , and the liquid inlet plug and liquid outlet plug in the charging interface are the liquid inlet plug 4311 and liquid outlet plug 4312 in the liquid cooling plug 431 shown in FIG5 . The vehicle interface M1 shown in FIG22 is a vehicle interface M1 shown in FIG5 , a set of DC sockets in the vehicle interface M1 is a set of DC sockets 510 shown in FIG5 , and the liquid inlet socket and liquid outlet socket in the vehicle interface M1 are the liquid inlet socket 531 and liquid outlet socket 532 in the liquid cooling socket 530 shown in FIG5 .

In some embodiments, in combination with FIG. 5 and FIG. 22 , the charging gun 430 further includes a connection confirmation plug and a connection confirmation circuit connected to the connection confirmation plug, and the connection confirmation plug is provided in the charging interface shown in FIG. 22 . The electric vehicle 500 further includes a connection confirmation socket and a connection confirmation circuit connected to the connection confirmation socket, and the connection confirmation socket is provided in the vehicle interface M1 shown in FIG. 22 . The connection confirmation socket is used to connect the connection confirmation plug of the charging gun 430 .

In a specific implementation, as shown in FIG. 22 , when the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, when the DC socket is connected to the DC plug, the liquid cooling socket is connected to the liquid cooling plug, and the connection confirmation socket is connected to the connection confirmation plug, the connection confirmation circuit in the electric vehicle 500 forms a current loop through the connection confirmation circuit connected by the connection confirmation socket and the connection confirmation plug.

The electric vehicle 500 is used to determine the connection status of the liquid cooling socket and the liquid cooling plug, and the connection status of the DC socket and the DC plug according to the voltage of the detection point in the connection confirmation circuit of the electric vehicle 500. The electric vehicle 500 is used to confirm that the liquid cooling socket and the liquid cooling plug are successfully connected, and the DC socket and the DC plug are successfully connected when the voltage of the detection point in the connection confirmation circuit of the electric vehicle 500 reaches a preset value at the vehicle end.

When the electric vehicle 500 confirms that the liquid cooling socket and the liquid cooling plug are successfully connected, and the DC socket and the DC plug are successfully connected, the electric vehicle 500 can send a message indicating that the liquid cooling socket and the liquid cooling plug are successfully connected to the charging pile 400, and the charging pile 400 only needs to judge the connection status of the DC socket and the DC plug according to the voltage of the detection point in the connection confirmation circuit of the charging gun 430, thereby improving the efficiency of confirming the connection status. Among them, the charging pile 400 is used to confirm that the DC socket and the DC plug are successfully connected when the voltage of the detection point in the connection confirmation circuit of the charging gun 430 reaches the preset value of the pile end.

In the embodiment of the present application, when the liquid cooling socket is connected to the liquid cooling plug and the DC socket is connected to the DC plug, the connection confirmation circuit of the electric vehicle 500 and the connection confirmation circuit of the charging gun 430 form a loop, and the electric vehicle 500 can judge the connection status of the liquid cooling socket and the liquid cooling plug, and the DC socket and the DC plug according to the voltage of the detection point in the connection confirmation circuit of the electric vehicle 500. Furthermore, when the liquid cooling socket is successfully connected to the liquid cooling plug, when the charging device 410 in the charging pile 400 performs high-power charging on the electric vehicle 500, the off-vehicle cooling system 420 in the charging pile 400 can transmit the cooling medium to the liquid cooling pipeline 540 of the electric vehicle 500, so as to realize the heat dissipation of the power cable 550 by the liquid cooling pipeline 540. This is conducive to meeting the heat dissipation requirements of the power cable 550 when the electric vehicle 500 is charged at high power, improving the charging safety of the electric vehicle 500, and thus ensuring the normal high-power charging of the electric vehicle 500 by the charging device 410.

In conjunction with the accompanying drawings, the specific circuit form of the connection confirmation circuit in the electric vehicle 500 and the strategy of the electric vehicle 500 for determining the connection status between the DC socket and the DC plug, the liquid cooling socket and the liquid cooling plug are introduced below.

It should be understood that the execution subject of the electric vehicle 500 described below for determining the connection status between the DC socket and the DC plug, the liquid cooling socket and the liquid cooling plug may be, for example, a vehicle controller in the electric vehicle 500 .

FIG. 23 is a schematic diagram of the structure of a charging system 300 provided in an embodiment of the present application.

Referring to Figure 23, in some embodiments, the connection confirmation socket includes a first connection confirmation socket (i.e., the CC2 socket in the vehicle interface M1 shown in Figure 23), a second connection confirmation socket (i.e., the CC1 socket in the vehicle interface M1 shown in Figure 23) and a third connection confirmation socket (i.e., the CC3 socket in the vehicle interface M1 shown in Figure 23), and the connection confirmation circuit of the electric vehicle 500 includes a first connection confirmation circuit, a second connection confirmation circuit and a third connection confirmation circuit, and the first connection confirmation socket, the second connection confirmation socket and the third connection confirmation socket are respectively connected to the first connection confirmation circuit, the second connection confirmation circuit and the third connection confirmation circuit.

That is to say, in the embodiment of the present application, the first connection confirmation circuit in the electric vehicle 500 is a circuit connected to the CC2 socket in the vehicle interface M1, the second connection confirmation circuit in the electric vehicle 500 is a circuit connected to the CC1 socket in the vehicle interface M1, and the third connection confirmation circuit in the electric vehicle 500 is a circuit connected to the CC3 socket in the vehicle interface M1.

The electric vehicle 500 is used to confirm the connection status between the DC socket and the DC plug through the first connection confirmation circuit or the second connection confirmation circuit, and is used to confirm the connection status between the liquid cooling socket and the liquid cooling plug through the third connection confirmation circuit.

In the embodiment of the present application, the electric vehicle 500 uses different connection confirmation circuits to respectively determine the connection status between the DC socket and the DC plug, and the liquid cooling socket and the liquid cooling plug, which is beneficial to improving the accuracy of the electric vehicle 500 in determining the connection status between the DC socket and the DC plug, and the liquid cooling socket and the liquid cooling plug.

The specific circuit form of the third connection confirmation circuit for determining the connection status of the liquid cooling socket and the liquid cooling plug will be first introduced below in conjunction with the accompanying drawings.

Continuing to refer to FIG. 23 , in some embodiments, the third connection confirmation circuit includes a first resistance unit, and the first resistance unit includes, for example, a resistance R7. The third connection confirmation socket is connected to the voltage source U2 via the first resistance unit, and a detection point in the connection confirmation circuit of the electric vehicle 500 is located between the first resistance unit and the third connection confirmation socket, that is, the detection point may be the detection point 4 shown in FIG. 23 , which is located between the resistance R7 and the third connection confirmation socket.

When the vehicle interface M1 of the electric vehicle 500 is not connected to the charging interface of the charging gun 430, since the detection point 4 is connected to the voltage source U2, the voltage at the detection point 4 should be the voltage output by the voltage source U2. Only when the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, when the third connection confirmation socket is connected to the third connection confirmation plug, the voltage source U2 forms a loop through the resistor R7, the resistor R6 in the connection confirmation circuit of the charging gun 430, and the ground wire. In this loop, due to the resistor voltage division, the voltage at the detection point 4 will reach the corresponding vehicle-side preset value.

For example, the voltage output by the voltage source U2 is set to 12V, the resistance values of the resistors R7 and R6 are equal, and the vehicle-side preset value corresponding to the detection point 4 is 6V. Under this design, if the voltage at the detection point 4 reaches 6V, the electric vehicle 500 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected.

For another example, the voltage output by the voltage source U2 is still set to 12V, but the resistance values of the resistors R7 and R6 are different, such as the resistor R7 is 2Ω and the resistor R6 is 4Ω, then the vehicle-side preset value corresponding to the detection point 4 is 8V. Under this design, if the voltage at the detection point 4 reaches 8V, the electric vehicle 500 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected.

Based on the above analysis, when the voltage at detection point 4 is the voltage output by voltage source U2, electric vehicle 500 can identify that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at detection point 4 reaches the corresponding vehicle-side preset value, electric vehicle 500 can identify that the liquid cooling socket is successfully connected to the liquid cooling plug.

In the embodiment of the present application, since the detection point set in the connection confirmation circuit of the electric vehicle 500 is connected to the voltage source in the electric vehicle 500, when the voltage at the detection point is the voltage output by the voltage source, the electric vehicle 500 recognizes that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage at the detection point reaches the preset value at the vehicle end, the electric vehicle 500 recognizes that the liquid cooling socket is successfully connected to the liquid cooling plug. By identifying the connection status of the liquid cooling socket and the liquid cooling plug according to the voltage at the detection point, the accuracy of the electric vehicle 500 in identifying the connection status of the liquid cooling socket and the liquid cooling plug can be improved.

The following describes the specific circuit forms of the first connection confirmation circuit and the second connection confirmation circuit for determining the connection status of the DC socket and the DC plug in conjunction with the accompanying drawings.

Continuing to refer to FIG. 23, in some embodiments, the first connection confirmation circuit includes a third resistor unit, and the third circuit unit includes, for example, a resistor R5. The first connection confirmation socket is connected to the voltage source U2 via the third resistor unit. Another detection point in the connection confirmation circuit of the electric vehicle 500 is located between the third resistor unit and the first connection confirmation socket, that is, the detection point can be the detection point 2 shown in FIG. 23, which is located between the resistor R5 and the first connection confirmation socket.

When the vehicle interface M1 of the electric vehicle 500 is not connected to the charging interface of the charging gun 430, since the detection point 2 is connected to the voltage source U2, the voltage at the detection point 2 should be the voltage output by the voltage source U2. Only when the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, when the first connection confirmation socket and the first connection confirmation plug are connected, the voltage source U2 forms a loop through the resistor R5, the resistor R3 in the connection confirmation circuit of the charging gun 430, and the ground wire. In this loop, because of the resistor voltage division, the voltage at the detection point 2 will reach the corresponding vehicle-side preset value.

For example, the voltage output by the voltage source U2 is set to 12V, and the resistance values of the resistors R3 and R5 are equal, then the vehicle-side preset value corresponding to the detection point 2 is 6V. Under this design, if the voltage at the detection point 2 is 6V, the electric vehicle 500 recognizes that the DC socket and the DC plug are successfully connected.

For another example, the voltage output by the voltage source U2 is still set to 12V, but the resistance values of R3 and R5 are different, such as R3 is 2Ω and R5 is 4Ω, then the first vehicle-end preset value is 4V. Under this design, if the voltage at the detection point 2 is 4V, the electric vehicle 500 recognizes that the DC socket and the DC plug are successfully connected.

Based on the above analysis, when the voltage at detection point 2 is the voltage output by voltage source U2, electric vehicle 500 can identify that the DC socket is not connected to the DC plug. When the voltage at detection point 2 reaches the corresponding vehicle-side preset value, electric vehicle 500 can identify that the DC socket is successfully connected to the DC plug.

FIG. 24 is a schematic diagram of the structure of another charging system 300 provided in an embodiment of the present application.

Different from the embodiment shown in FIG23, in the embodiment shown in FIG24, the third resistor unit includes a resistor R5 and a switch S3. At this time, the detection point 2 for the electric vehicle 500 to determine the connection status of the DC socket and the DC plug is located between the switch S3 and the first connection confirmation socket. The specific identification process is similar to that of FIG23, and will not be repeated here to avoid repetition.

Continuing to refer to Figure 24, in some embodiments, the electric vehicle 500 also includes a grounding socket (i.e., the PE socket in the vehicle interface M1 shown in Figure 24), which is connected to the vehicle body ground platform, and the grounding socket is used to connect the grounding plug in the charging gun 430 (i.e., the PE plug in the charging interface shown in Figure 24). The second connection confirmation circuit includes a second resistance unit, and the second resistance unit includes, for example, resistors R4, R6 and a switch S2. The second connection confirmation socket is connected to the grounding socket through the second resistance unit. Among them, another detection point in the connection confirmation circuit of the electric vehicle 500 is located between the second resistance unit and the second connection confirmation socket, that is, the detection point can be the detection point 3 shown in Figure 24, which is located between the resistor R4 and the second connection confirmation socket.

When the vehicle interface M1 of the electric vehicle 500 is not connected to the charging interface of the charging gun 430, the voltage at the detection point 3 is 0V because the detection point 3 is connected to the vehicle body ground platform. Only when the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, when the second connection confirmation socket and the second connection confirmation plug are connected, the voltage source U1 in the charging pile 400 forms a loop through the resistor R1, the resistor R4 in the electric vehicle 400, and the ground wire. In this loop, due to the resistor voltage division, the voltage at the detection point 3 will reach the corresponding vehicle-side preset value.

For example, the voltage output by the voltage source U1 is set to 12V, and the resistance values of the resistors R1 and R4 are equal, then the vehicle-side preset value corresponding to the detection point 3 is 6V. Under this design, if the voltage at the detection point 3 reaches 6V, the electric vehicle 500 recognizes that the DC socket and the DC plug are successfully connected.

For another example, the voltage output by the voltage source U1 is still set to 12V, but the resistance values of the resistors R1 and R4 are different, such as R1 is 2Ω and R4 is 4Ω, then the vehicle-side preset value corresponding to the detection point 3 is 8V. Under this design, if the voltage at the detection point 3 reaches 8V, the electric vehicle 500 recognizes that the DC socket and the DC plug are successfully connected.

When the DC socket is connected to the DC plug, the voltage at detection point 2 and the voltage at detection point 3 are the corresponding vehicle-side preset values, respectively. Therefore, based on the analysis of detection point 2 and detection point 3, when the voltage at detection point 3 is 0V and the voltage at detection point 2 is the voltage output by voltage source U2, the electric vehicle 500 can recognize that the DC socket is not connected to the DC plug. When the voltage at detection point 2 reaches the corresponding vehicle-side preset value and the voltage at detection point 3 reaches the corresponding vehicle-side preset value, the electric vehicle 500 can recognize that the DC socket is connected to the DC plug.

In an embodiment of the present application, by setting two detection points (i.e., detection point 2 and detection point 3) in the connection confirmation circuit of the electric vehicle 500 for identifying the connection status of the DC socket and the DC plug, the accuracy of the electric vehicle 500 in identifying the connection status of the DC socket and the DC plug can be further improved.

The above introduces different embodiments of the electric vehicle 500 judging the connection status of the liquid cooling socket and the liquid cooling plug, and the connection status of the DC socket and the DC plug from the perspective of the electric vehicle 500. In the specific implementation, since the electric vehicle 500 sends a message indicating that the liquid cooling socket and the liquid cooling plug are successfully connected to the charging pile 400, the charging pile 400 only needs to judge the connection status of the DC socket and the DC plug. From the perspective of the charging pile 400, the specific circuit form of the connection confirmation circuit in the charging gun 430 and the strategy of the charging pile 400 to judge the connection status of the DC socket and the DC plug are introduced below.

Continuing to refer to Figure 23, in some embodiments, the connection confirmation plug includes a first connection confirmation plug (i.e., the CC2 plug in the charging interface shown in Figure 23), a second connection confirmation plug (i.e., the CC1 plug in the charging interface shown in Figure 23) and a third connection confirmation plug (i.e., the CC3 plug in the charging interface shown in Figure 23), and the connection confirmation circuit in the charging gun 430 includes a first connection confirmation circuit, a second connection confirmation circuit and a third connection confirmation circuit, and the first connection confirmation plug, the second connection confirmation plug and the third connection confirmation plug are respectively connected to the first connection confirmation circuit, the second connection confirmation circuit and the third connection confirmation circuit.

That is to say, in the embodiment of the present application, the first connection confirmation circuit in the charging gun 430 is a circuit connected to the CC2 plug in the charging interface, the second connection confirmation circuit in the charging gun 430 is a circuit connected to the CC1 plug in the charging interface, and the third connection confirmation circuit in the charging gun 430 is a circuit connected to the CC3 plug in the charging interface.

Among them, the first connection confirmation circuit includes a fourth resistance unit, and the fourth resistance unit includes, for example, a resistor R3. The first connection confirmation plug is connected to the device ground platform of the charging pile 400 through the fourth resistance unit. The second connection confirmation circuit includes a fifth resistance unit, and the fifth resistance unit includes, for example, a resistor R1, and the second connection confirmation plug is connected to the voltage source U1 through the fifth resistance unit. The detection point of the connection confirmation circuit in the charging gun 430 is located between the fifth resistance unit and the second connection confirmation plug, that is, the detection point can be the detection point 1 shown in Figure 23. The third connection confirmation circuit includes a sixth resistance unit, and the sixth resistance unit includes, for example, a resistor R6. The third connection confirmation plug is connected to the device ground platform through the sixth resistance unit.

It can be understood that in the embodiment of the present application, the charging pile 400 can use the method in the charging standard to determine the connection status of the DC plug and the DC socket.

Specifically, when the vehicle interface M1 of the electric vehicle 500 is not connected to the charging interface of the charging gun 430, since the detection point 1 is connected to the voltage source U1, the voltage at the detection point 1 should be the voltage output by the voltage source U1. Only when the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, the voltage source U1 forms a loop through the resistor R1, the resistor R4 in the connection confirmation circuit of the electric vehicle 500, and the ground wire. In this loop, due to the resistor voltage division, the voltage at the detection point 1 will reach the corresponding pile end preset value.

For example, the voltage output by the voltage source U1 is set to 12V, and the resistance values of the resistors R1 and R4 are equal, then the pile end preset value corresponding to the detection point 1 is 6V. Under this design, if the voltage at the detection point 1 reaches 6V, the charging pile 400 recognizes that the DC socket and the DC plug are successfully connected.

For another example, the voltage output by the voltage source U1 is still set to 12V, but the resistance values of the resistors R1 and R4 are different, such as the resistor R1 is 2Ω and the resistor R4 is 4Ω, then the pile end preset value corresponding to the detection point 1 is 8V. Under this design, if the voltage at the detection point 1 reaches 8V, the charging pile 400 recognizes that the DC socket and the DC plug are successfully connected.

Based on the above analysis, when the voltage at detection point 1 is the voltage output by voltage source U1, charging pile 400 can identify that the DC socket is not connected to the DC plug. When the voltage at detection point 1 reaches the corresponding pile end preset value, charging pile 400 can identify that the DC socket is successfully connected to the DC plug.

Referring to FIG. 24 , in some embodiments, different from the embodiment shown in FIG. 23 , in the embodiment shown in FIG. 24 , the fifth resistor unit includes resistors R1, R2 and switch S1. The detection point 1 for the charging pile 400 to identify the connection status of the DC plug and the DC socket is still located between the fifth resistor unit and the second connection confirmation plug. The specific process of the charging pile 400 identifying the connection status of the DC socket and the DC plug can be referred to the relevant description of the embodiment shown in FIG. 23 , which will not be repeated here.

Based on this, the above describes the specific way in which the electric vehicle 500 and the charging pile 400 determine the connection status of the DC socket and the DC plug, and the connection status of the liquid cooling socket and the liquid cooling plug according to the connection confirmation circuits respectively set. The following will describe the connection sequence of each plug in the charging interface of the charging gun 430 and each socket in the vehicle interface of the electric vehicle 500 during the connection process.

FIG. 25 is a schematic diagram of an interface between a charging interface of a charging gun 430 and a vehicle interface M1 of an electric vehicle 500 provided in an embodiment of the present application.

Among them, the I socket and O socket in the vehicle interface M1 are the liquid inlet socket 531 and the liquid outlet socket 532 in the liquid cooling socket 530 shown in FIG5 , the CC1 socket in the vehicle interface M1 is the second connection confirmation socket mentioned above, the CC2 socket in the vehicle interface M1 is the first connection confirmation socket mentioned above, the CC3 socket in the vehicle interface M1 is the third connection confirmation socket mentioned above, and the PE socket in the vehicle interface M1 is the grounding socket mentioned above. Correspondingly, the I plug and O plug in the charging interface are the liquid outlet plug 4322 and the liquid inlet plug 4321 in the liquid cooling plug 432 shown in FIG5 , the CC1 plug in the charging interface is the second connection confirmation plug mentioned above, the CC2 plug in the charging interface is the first connection confirmation plug mentioned above, the CC3 plug in the charging interface is the third connection confirmation plug mentioned above, and the PE plug in the charging interface is the grounding plug mentioned above.

Referring to FIG. 25 , in some embodiments, the electric vehicle 500 further includes an interface housing, which is sleeved on the periphery of at least one set of DC sockets, liquid cooling sockets (i.e., liquid inlet sockets and liquid outlet sockets), and connection confirmation sockets to form a vehicle interface M1. Correspondingly, the charging gun 430 further includes a charging interface housing, which is sleeved on the periphery of at least one set of DC plugs, liquid cooling plugs (i.e., liquid inlet plugs and liquid outlet plugs), and connection confirmation plugs to form a charging interface.

In some embodiments, the distance d3' between the end face of the third connection confirmation socket (CC3 socket) and the end face of the interface shell is greater than the distance d0' between the end face of the liquid cooling socket and the end face of the interface shell. The distance d3 between the end face of the third connection confirmation plug (CC3 plug) and the end face of the charging interface shell is greater than the distance d3 between the end face of the liquid cooling plug and the end face of the charging interface shell. That is, d3'＞d0', d3＞d0.

Among them, the end face of the interface shell is the end face of the interface shell facing the outside of the body of the electric vehicle 500, the end face of the third connection confirmation socket (CC3 socket) is the end face of the third connection confirmation socket (CC3 socket) facing the outside of the body of the electric vehicle 500, and the end face of the liquid cooling socket is the end face of the liquid cooling socket facing the outside of the body of the electric vehicle. Correspondingly, the end face of the charging interface shell is the end face of the charging interface shell facing the outside of the charging gun 430, the end face of the third connection confirmation plug (CC3 plug) is the end face of the third connection confirmation plug (CC3 plug) facing the outside of the charging gun 430, and the end face of the liquid cooling plug is the end face of the liquid cooling plug facing the outside of the charging gun 430.

Based on the above design, during the process of the charging interface and the vehicle interface M1, the liquid cooling socket in the charging interface is first connected to the liquid cooling plug in the vehicle interface M1, that is, the liquid inlet plug (O plug) is first connected to the liquid outlet socket (O socket), and the liquid outlet plug (I plug) is first connected to the liquid inlet socket (I socket), and then the third connection confirmation socket (CC3 socket) in the charging interface is connected to the third connection confirmation plug (CC3 plug) in the vehicle interface M1. This is conducive to realizing that when the charging device 410 in the charging pile 400 charges the electric vehicle 500 with high power, the vehicle-outside cooling system 420 in the charging pile 400 dissipates heat from the power cable 520 of the electric vehicle 500.

This is because, if the third connection confirmation socket (CC3 socket) is connected to the third connection confirmation plug (CC3 plug) first, and the liquid cooling socket is connected to the liquid cooling plug later, it is possible that the third connection confirmation socket (CC3 socket) and the third connection confirmation plug (CC3 plug) are already connected, but the liquid cooling socket is not connected to the liquid cooling plug. This may cause the connection state of the liquid cooling socket and the liquid cooling plug confirmed by the third connection confirmation circuit of the electric vehicle 500 through the third connection confirmation socket to be wrong, thereby causing a leakage problem between the liquid cooling socket and the liquid cooling plug. Therefore, in the implementation of this application, by designing the liquid cooling socket to be connected to the liquid cooling plug first, and the third connection confirmation socket to be connected to the third connection confirmation plug later, it is helpful to avoid the above-mentioned leakage problem caused by the electric vehicle 500 misjudging the connection state of the liquid cooling socket and the liquid cooling plug.

Continuing to refer to FIG. 25 , in some embodiments, the distance d3’ between the end face of the third connection confirmation socket (CC socket 3) and the end face of the interface shell is less than or equal to the distance d1’ between the end face of the second connection confirmation socket (CC1 socket) and the end face of the interface shell. The distance d3 between the end face of the third connection confirmation plug (CC3 plug) and the end face of the charging interface shell is less than or equal to the distance d1 between the end face of the second connection confirmation plug (CC1 plug) and the end face of the charging interface shell, that is, d3’≤d1’, d3≤d1. Among them, the end face of the second connection confirmation socket is the end face of the second connection confirmation socket facing the outside of the body of the electric vehicle 500, and the end face of the second connection confirmation plug is the end face of the second connection confirmation plug facing the outside of the charging gun 430.

Based on the above design, during the connection between the charging interface and the vehicle interface M1, when d3＜d1, d3'＜d1', the third connection confirmation socket (CC3 socket) and the third connection confirmation plug (CC3 plug) are connected first, and the second connection confirmation socket (CC1 socket) and the second connection confirmation plug (CC1 plug) are connected later, which is equivalent to the charging pile 400 performing the final full connection confirmation between the charging interface and the vehicle interface M1. Alternatively, when d3＝d1, d3'＝d1', the third connection confirmation socket and the third connection confirmation plug, and the second connection confirmation socket and the second connection confirmation plug are connected at the same time, which is equivalent to the charging pile 400 and the electric vehicle 500 jointly performing the final full connection confirmation between the charging interface and the vehicle interface M1.

It is understandable that according to the existing charging standard protocol, the charging gun is usually only equipped with a DC plug, a first connection confirmation plug and a second connection confirmation plug, and a liquid cooling plug and a third connection confirmation plug are not provided, and in the process of connecting the various plugs of the charging gun with the various sockets of the electric vehicle, the second connection confirmation plug and the second connection confirmation socket are usually connected last, that is, the final full connection confirmation is performed by the charging pile.

In the embodiment of the present application, by designing d3'≤d1', d3≤d1, the charging pile 400, or the charging pile 400 and the electric vehicle 500, can simultaneously perform the final full connection confirmation. This design still complies with the second connection confirmation plug and the second connection confirmation socket specified in the existing charging standard protocol, that is, it complies with the provisions of the existing charging standard protocol that the charging pile 400 performs the final full connection confirmation, so that the plugs of the charging interface and the sockets of the vehicle interface M1 in the embodiment of the present application can continue to use the connection sequence of the plugs and sockets specified in the existing charging standard. In this way, the existing charging standard protocol can be left unchanged, but a connection between a liquid cooling socket and a liquid cooling plug, and a connection between a third connection confirmation socket and a third connection confirmation plug can be added to the existing charging standard protocol, which is relatively simple to implement.

Further, in some embodiments, the distance d3' between the end face of the third connection confirmation socket and the end face of the interface shell is equal to the distance d1' between the end face of the second connection confirmation socket and the end face of the interface shell, the distance d3' between the end face of the third connection confirmation socket and the end face of the interface shell is greater than the distance d0' between the end face of the liquid cooling socket and the end face of the interface shell, and the distance d0' between the end face of the liquid cooling socket and the end face of the interface shell is greater than or equal to the distance d2' between the end face of the first connection confirmation socket and the end face of the interface shell. Wherein, the end face of the first connection confirmation socket is the end face of the first connection confirmation socket facing the outer side of the body of the electric vehicle 500.

Furthermore, the distance d3 between the end face of the third connection confirmation plug and the end face of the charging interface shell is equal to the distance d1 between the end face of the second connection confirmation plug and the end face of the charging interface shell, the distance d3 between the end face of the third connection confirmation plug and the end face of the charging interface shell is greater than the distance d0 between the end face of the liquid cooling plug and the end face of the charging interface shell, and the distance d0 between the end face of the liquid cooling plug and the end face of the charging interface shell is greater than or equal to the distance d2 between the end face of the first connection confirmation plug and the end face of the charging interface shell. The end face of the first connection confirmation plug is the end face of the first connection confirmation plug facing the outside of the charging gun 430.

That is, in the above embodiment, d2≤d0<d1＝d3, d2'≤d0'<d1'＝d3'. It can be understood that, based on the design of d2≤d0<d1＝d3, d2'≤d0'<d1'＝d3', in the process of connecting the charging interface to the vehicle interface M1, the first connection confirmation socket (CC2 socket) and the first connection confirmation plug (CC2 plug) are connected first, the liquid cooling socket and the liquid cooling plug are connected again, and the second connection confirmation socket (CC1 socket) and the second connection confirmation plug (CC1 plug), and the third connection confirmation socket (CC3 socket) and the third connection confirmation plug (CC3 plug) are connected last. Among them, the connection between the first connection confirmation socket and the first connection confirmation plug can indicate that the charging gun and the vehicle interface are in a semi-connected state, and the connection between the second connection confirmation socket and the second connection confirmation plug, and the connection between the third connection confirmation socket and the third connection confirmation plug can indicate that the charging gun and the vehicle interface are in a fully connected state.

Thus, in a specific implementation, a traction device can be designed in the electric vehicle 500. When the electric vehicle 500 detects that the first connection confirmation socket and the first connection confirmation plug are connected, that is, it detects that the charging gun 430 and the vehicle interface are in a semi-connected state, the electric vehicle 500 can control the traction device to pull the charging gun 430 to move so that the liquid cooling socket and the liquid cooling plug are connected first, and then the second connection confirmation socket and the second connection confirmation plug, and the third connection confirmation socket and the third connection confirmation plug are connected, that is, the charging gun is fully connected to the vehicle interface M1. In this process, the charging gun is pulled by the traction device to move so that the charging gun and the vehicle interface M1 are in a fully connected state, and the user does not need to push the charging gun manually, which is conducive to improving the user experience.

In addition, if d3＜d1, d3'＜d1' is designed, it means that the third connection confirmation socket is connected to the third connection confirmation plug first, and the second connection confirmation socket is connected to the second connection confirmation plug later. It is possible that the third connection confirmation socket is successfully connected to the third connection confirmation plug, but the second connection confirmation socket is not connected to the second connection confirmation plug. Based on this situation, the charging pile 400 misjudges that the charging gun 430 and the vehicle interface M1 are not in a fully connected state, and the external cooling system 420 in the charging pile 400 will not transmit the cooling medium to the electric vehicle 500, thereby failing to solve the heat dissipation problem of each set of DC sockets 510 in the electric vehicle 500 when the power battery 520 is charged, thereby affecting the normal high-power charging of the electric vehicle 500.

Therefore, in the embodiment of the present application, by designing d1=d3, d1'=d3', that is, the third connection confirmation socket and the third connection confirmation plug, and the second connection confirmation socket and the second connection confirmation plug are connected at the same time, it is equivalent to the electric vehicle 500 and the charging pile 400 jointly performing the final complete connection confirmation, which is beneficial to avoid misjudgment of the charging pile 400 and ensure that the external cooling system 420 provides cooling medium to the electric vehicle 500.

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (20)

1. An electric vehicle, characterized in that the electric vehicle comprises at least one group of direct current sockets, liquid cooling sockets, a power battery and a liquid cooling pipeline;

Each group of direct current sockets is connected with the power battery through a power cable and is used for transmitting direct current output by the charging equipment to the power battery;

The liquid cooling socket is communicated with the liquid cooling pipeline and is used for conveying a cooling medium of an off-vehicle cooling system to the liquid cooling pipeline;

The liquid cooling pipeline is used for radiating heat of the power cables connected with each group of direct-current sockets.

2. The electric vehicle of claim 1, characterized in that the liquid cooled outlet comprises a liquid inlet and a liquid outlet;

The liquid cooling pipeline is coated on the periphery of the power cable connected with each group of direct current socket, or the power cable connected with each group of direct current socket surrounds the periphery of the liquid cooling pipeline;

The input end of the liquid cooling pipeline is communicated with the liquid inlet socket, and the output end of the liquid cooling pipeline is communicated with the liquid outlet socket;

The cooling medium of the cooling system outside the vehicle flows into the liquid cooling pipeline through the liquid inlet socket and flows out of the electric vehicle through the liquid outlet socket.

3. The electric vehicle of claim 2, further comprising a liquid cooling panel, wherein each set of the dc outlets comprises a positive dc outlet and a negative dc outlet, and wherein the liquid cooling line comprises a first liquid inlet line and a first liquid outlet line;

The first liquid inlet pipeline is coated on the periphery of a power cable connected with one of the positive direct current socket and the negative direct current socket, and the first liquid outlet pipeline is coated on the periphery of a power cable connected with the other one of the positive direct current socket and the negative direct current socket;

The liquid inlet socket is communicated with the input end of the first liquid inlet pipeline, the output end of the first liquid inlet pipeline is communicated with the input end of the first liquid outlet pipeline through the liquid cooling plate, and the output end of the first liquid outlet pipeline is communicated with the liquid outlet socket.

4. The electric vehicle of claim 2, further comprising a liquid cooling panel, wherein each set of the dc outlets comprises a positive dc outlet and a negative dc outlet, and wherein the liquid cooling line comprises a first liquid inlet line and a first liquid outlet line;

The power cable connected with one of the positive direct current socket and the negative direct current socket surrounds the periphery of the first liquid inlet pipeline, and the power cable connected with the other one of the positive direct current socket and the negative direct current socket surrounds the periphery of the first liquid outlet pipeline;

The liquid inlet socket is communicated with the input end of the first liquid inlet pipeline, the output end of the first liquid inlet pipeline is communicated with the input end of the first liquid outlet pipeline through the liquid cooling plate, and the output end of the first liquid outlet pipeline is communicated with the liquid outlet socket.

5. The electric vehicle of claim 3 or 4, characterized in that the electric vehicle further comprises a thermal management system, a second liquid inlet line and a second liquid outlet line;

The liquid inlet socket is communicated with the input end of the second liquid inlet pipeline, the output end of the second liquid inlet pipeline is communicated with the input end of the second liquid outlet pipeline through the thermal management system, and the output end of the second liquid outlet pipeline is communicated with the liquid outlet socket;

The thermal management system is used for radiating heat of the power battery.

6. The electric vehicle of claim 5, characterized in that the electric vehicle further comprises two three-way valves;

three interfaces of one three-way valve are respectively communicated with the liquid inlet socket, the input end of the liquid cooling pipeline and the input end of the second liquid inlet pipeline;

And the other three interfaces of the three-way valve are respectively communicated with the liquid outlet socket, the output end of the liquid cooling pipeline and the output end of the second liquid outlet pipeline.

7. The electric vehicle of any of claims 3-6, characterized in that the electric vehicle further comprises at least one cooling tank, each of the at least one cooling tank comprising a liquid inlet and a liquid outlet;

the liquid inlet is communicated with the liquid inlet socket, and the liquid outlet is communicated with the input end of the liquid cooling pipeline;

the at least one cooling pool is used for radiating heat of each group of the direct current sockets.

8. The electric vehicle of claim 7, characterized in that the at least one set of dc outlets includes two sets of dc outlets, the at least one cooling pool includes one cooling pool;

The two groups of direct current sockets are arranged along a first direction, and positive direct current sockets and negative direct current sockets of each group of direct current sockets in the two groups of direct current sockets are arranged along a direction perpendicular to the first direction;

The cooling pool is located between the two sets of direct current sockets along the first direction, the cooling pool comprises two outer surfaces which are oppositely arranged along the first direction, one outer surface faces one set of direct current sockets in the two sets of direct current sockets, the other outer surface faces the other set of direct current sockets, the one outer surface is used for being in heat conduction contact with the positive direct current sockets and the negative direct current sockets of the set of direct current sockets, and the other outer surface is used for being in heat conduction contact with the positive direct current sockets and the negative direct current sockets of the other set of direct current sockets.

9. The electric vehicle of any of claims 1-8, characterized in that the electric vehicle further comprises a connection confirmation socket, a connection confirmation circuit, and a vehicle interface for connecting a charging gun, the at least one set of dc sockets, the liquid cooled socket, and the connection confirmation socket being disposed in the vehicle interface, the connection confirmation socket being connected to the connection confirmation circuit;

Each group of direct current sockets is used for connecting a group of direct current plugs of the charging gun, the liquid cooling sockets are used for connecting liquid cooling plugs of the charging gun, and the connection confirmation sockets are used for connecting connection confirmation plugs of the charging gun;

The connection confirmation circuit of the electric vehicle forms a current loop through the connection confirmation circuit connected with the connection confirmation socket and the connection confirmation plug, and the electric vehicle is used for judging the connection state of the liquid cooling socket and the liquid cooling plug and the connection state of each group of direct current sockets and the group of direct current plugs according to the voltage of a detection point in the connection confirmation circuit of the electric vehicle;

and the electric vehicle is used for confirming that the liquid cooling socket and the liquid cooling plug are successfully connected and that each group of direct current sockets and one group of direct current plugs are successfully connected when the voltage of the detection point reaches a preset value.

10. The electric vehicle of claim 9, characterized in that the connection confirmation sockets include a first connection confirmation socket, a second connection confirmation socket, and a third connection confirmation socket, the connection confirmation circuits of the electric vehicle include a first connection confirmation circuit, a second connection confirmation circuit, and a third connection confirmation circuit, the first connection confirmation socket, the second connection confirmation socket, and the third connection confirmation socket being connected to the first connection confirmation circuit, the second connection confirmation circuit, and the third connection confirmation circuit, respectively;

The electric vehicle is used for confirming the connection state of each group of the direct current sockets and the group of direct current plugs through the first connection confirming circuit or the second connection confirming circuit;

the electric vehicle is configured to confirm a connection state of the liquid-cooled socket and the liquid-cooled plug by the third connection confirmation circuit.

11. The electric vehicle of claim 10, characterized in that the third connection confirmation circuit comprises a first resistance unit through which the third connection confirmation socket is connected to a voltage source, the detection point being located between the first resistance unit and the third connection confirmation socket.

12. The electric vehicle of claim 10 or 11, characterized in that it further comprises an interface housing that is sleeved over the outer circumferences of the at least one set of dc outlet, the liquid cooled outlet and the connection confirmation outlet to form the vehicle interface;

The distance between the end face of the third connection confirmation socket and the end face of the interface housing is larger than the distance between the end face of the liquid cooling socket and the end face of the interface housing;

The end face of the third connection confirmation socket is an end face of the third connection confirmation socket facing the outer side of the electric vehicle body, the end face of the interface housing is an end face of the interface housing facing the outer side of the electric vehicle body, and the end face of the liquid cooling socket is an end face of the liquid cooling socket facing the outer side of the electric vehicle body.

13. The electric vehicle of claim 12, characterized in that the electric vehicle further comprises a ground socket disposed in the interface housing, the ground socket being connected to a body ground platform, the ground socket being for connecting to a ground plug of the charging gun;

the second connection confirmation circuit comprises a second resistance unit, and the second connection confirmation socket is connected with the grounding socket through the second resistance unit;

The distance between the end face of the third connection confirmation socket and the end face of the interface housing is smaller than or equal to the distance between the end face of the second connection confirmation socket and the end face of the interface housing, wherein the end face of the second connection confirmation socket is the end face of the second connection confirmation socket facing the outer side of the body of the electric vehicle.

14. The electric vehicle according to claim 13, characterized in that a distance between an end face of the third connection confirmation receptacle and an end face of the interface housing is equal to a distance between an end face of the second connection confirmation receptacle and an end face of the interface housing, and a distance between an end face of the liquid-cooled receptacle and an end face of the interface housing is greater than or equal to a distance between an end face of the first connection confirmation receptacle and an end face of the interface housing, wherein an end face of the first connection confirmation receptacle is an end face of the first connection confirmation receptacle that faces an outside of a vehicle body of the electric vehicle.

15. The electric vehicle of any of claims 1-8, characterized in that the electric vehicle further comprises a liquid-cooled connection confirmation socket, a liquid-cooled connection confirmation circuit, and two vehicle interfaces, one of the vehicle interfaces being for connecting a charging gun and the other of the vehicle interfaces being for connecting a liquid-cooled gun, the at least one set of dc sockets being disposed in the one vehicle interface, the liquid-cooled socket and the liquid-cooled connection confirmation socket being disposed in the other vehicle interface, the liquid-cooled connection confirmation socket being connected to the liquid-cooled connection confirmation circuit;

the liquid cooling socket is used for being connected with a liquid cooling plug of the liquid cooling gun, and the liquid cooling connection confirmation socket is used for being connected with a liquid cooling connection confirmation plug of the liquid cooling gun;

the liquid cooling connection confirmation circuit of the electric vehicle forms a current loop through the liquid cooling connection confirmation circuit connected with the liquid cooling connection confirmation socket and the liquid cooling connection confirmation plug, and the electric vehicle is used for judging the connection state of the liquid cooling socket and the liquid cooling plug according to the voltage of at least one detection point in the liquid cooling connection confirmation circuit of the electric vehicle;

the electric vehicle is used for confirming that the liquid cooling socket and the liquid cooling plug are successfully connected when the voltage of each detection point in the at least one detection point reaches a preset value.

16. The electric vehicle of claim 15, characterized in that the liquid-cooled connection confirmation receptacle comprises a first liquid-cooled connection confirmation receptacle, and the liquid-cooled connection confirmation circuit of the electric vehicle comprises a first liquid-cooled connection confirmation circuit;

The first liquid cooling connection confirmation circuit comprises a first resistance unit, and the first liquid cooling connection confirmation socket is connected with a voltage source through the first resistance unit.

17. The electric vehicle of claim 16, characterized in that the at least one detection point comprises one detection point located between the first resistance unit and the first liquid-cooled connection confirmation socket.

18. The electric vehicle of claim 16 or 17, characterized in that the electric vehicle further comprises an interface housing that is sleeved around the liquid-cooled socket and the liquid-cooled connection confirmation socket to form the other vehicle interface;

The distance between the end face of the first liquid cooling connection confirmation socket and the end face of the interface shell is larger than the distance between the end face of the liquid cooling socket and the end face of the interface shell;

the end face of the interface shell is the end face of the interface shell facing the outer side of the electric vehicle body, the end face of the first liquid cooling connection confirmation socket is the end face of the first liquid cooling connection confirmation socket facing the outer side of the electric vehicle body, and the end face of the liquid cooling socket is the end face of the liquid cooling socket facing the outer side of the electric vehicle body.

19. The electric vehicle of claim 16, further comprising a ground socket disposed in the other vehicle interface, the ground socket being connected to a body ground platform, the ground socket being for connecting to a ground plug of the liquid chiller gun;

The liquid cooling connection confirmation socket comprises a second liquid cooling connection confirmation socket, the liquid cooling connection confirmation circuit of the electric vehicle comprises a second liquid cooling connection confirmation circuit, the second liquid cooling connection confirmation circuit comprises a second resistance unit, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform through the second resistance unit;

The at least one detection point comprises two detection points, one detection point is positioned between the first resistance unit and the first liquid cooling connection confirmation socket, and the other detection point is positioned between the second resistance unit and the second liquid cooling connection confirmation socket.

20. The electric vehicle of claim 19, characterized in that the electric vehicle further comprises an interface housing that is sleeved around the liquid-cooled receptacle, the liquid-cooled connection confirmation receptacle, and the ground receptacle to form the other vehicle interface;

The distance between the end face of the first liquid cooling connection confirmation socket and the end face of the interface shell is larger than the distance between the end face of the liquid cooling socket and the end face of the interface shell, and the distance between the end face of the second liquid cooling connection confirmation socket and the end face of the interface shell is larger than the distance between the end face of the liquid cooling socket and the end face of the interface shell;

The end face of the interface shell is the end face of the interface shell facing the outer side of the electric vehicle body, the end face of the first liquid cooling connection confirmation socket is the end face of the first liquid cooling connection confirmation socket facing the outer side of the electric vehicle body, the end face of the second liquid cooling connection confirmation socket is the end face of the second liquid cooling connection confirmation socket facing the outer side of the electric vehicle body, and the end face of the liquid cooling socket is the end face of the liquid cooling socket facing the outer side of the electric vehicle body.