CN117962657A

CN117962657A - Electric vehicle

Info

Publication number: CN117962657A
Application number: CN202410120609.6A
Authority: CN
Inventors: 程东
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2024-01-27
Filing date: 2024-01-27
Publication date: 2024-05-03

Abstract

The embodiment of the application provides an electric vehicle. 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 the external cooling system of the vehicle to the liquid cooling pipeline, so that the liquid cooling pipeline is used for radiating heat of the power cable connected with each group of direct current sockets, and therefore the heat radiating requirement of the power cable when the power battery is charged in a high power mode is met.

Description

Electric vehicle

Technical Field

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

Background

In the charging process of the electric vehicle, the direct current 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, along with meeting the requirement of users on the charging time of electric vehicles, the charging power output by the charging pile to the direct current socket is larger and larger, and correspondingly, the charging power transmitted to the power battery through the power cable is larger and larger, so that the high-power charging of the charging pile on the electric vehicles is realized. However, the increase of the charging power is often accompanied by a substantial increase of the heat generated by the power cable, which heat, if not removed in time, may cause safety problems for the electric vehicle during high-power charging.

Disclosure of Invention

The application provides an electric vehicle, which can radiate heat of a power cable connected between a direct-current socket and a power battery by using a cooling medium provided by an external cooling system, and is beneficial to meeting the heat radiation requirement of the power cable when the power battery of the electric vehicle is charged in a high power mode, so that the safety of the electric vehicle in the high power charging mode is improved, and the normal operation of the high power charging of the electric vehicle is ensured.

In a first aspect, an electric vehicle is provided, the electric vehicle comprising at least one set of a dc outlet, a liquid cooled outlet, a power cell, and a liquid cooled conduit; 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 the vehicle external 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.

In the electric vehicle provided by the embodiment of the application, the liquid cooling pipeline can be communicated with the external cooling system through the liquid cooling socket, so that when the power battery is charged in a high power mode, the liquid cooling pipeline can conduct liquid cooling heat dissipation on the power cable connected between each group of direct current socket and the power battery by using the cooling medium provided by the external cooling system, so that the heat dissipation requirement of the power cable when the power battery is charged in a high power mode is met, the charging safety of the electric vehicle is improved, and the normal operation of the high power charging of the electric vehicle is ensured.

In one implementation, the liquid cooling socket comprises a liquid inlet socket and a liquid outlet socket; the liquid cooling pipeline is coated on the periphery of the power cable connected with each group of direct current sockets, or the power cable connected with each group of direct current sockets 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.

In the above technical scheme, the cooling medium provided by the off-board cooling system can circulate between the off-board cooling system and the liquid cooling pipeline. And the cooling medium can exchange heat with the power cables connected with each group of direct current sockets through the liquid cooling pipeline in the flowing process of the liquid cooling pipeline so as to take away heat generated by the power cables and realize liquid cooling heat dissipation of the power cables.

In one implementation, the electric vehicle further comprises a liquid cooling plate, each group of direct current sockets comprises a positive direct current socket and a negative direct current socket, and the liquid cooling pipeline comprises 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 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.

In the above technical scheme, the cooling medium provided by the cooling system outside the vehicle can flow into the first liquid inlet pipeline through the liquid inlet socket at first, and exchanges heat with the power cable wrapped by the first liquid inlet pipeline, so as to take away the heat generated by the power cable. Then, the cooling medium flows into the first liquid outlet pipeline through the liquid cooling plate and exchanges heat with the power cable coated by the first liquid outlet pipeline so as to take away heat generated by the power cable, thereby realizing liquid cooling heat dissipation of the power cable connected with each group of direct current sockets.

In addition, by communicating the liquid cooling plate between the first liquid inlet pipe and the first liquid outlet pipe, on the one hand, the first liquid inlet pipe and the first liquid outlet pipe can be communicated; on the other hand, the liquid cooling channel of the liquid cooling plate is equivalent to a part of the liquid cooling pipeline, so that the pipeline design between the output end of the first liquid inlet pipeline and the input end of the first liquid outlet pipeline is simplified.

In one implementation, the electric vehicle further comprises a liquid cooling plate, each group of direct current sockets comprises a positive direct current socket and a negative direct current socket, and the liquid cooling pipeline comprises a first liquid inlet pipeline and a first liquid outlet pipeline; the power cable of one connecting socket 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 connecting socket 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.

In the above technical scheme, the cooling medium provided by the cooling system outside the vehicle can flow into the first liquid inlet pipeline through the liquid inlet socket at first, and exchanges heat with the power cable around the periphery of the first liquid inlet pipeline, so as to take away the heat generated by the power cable. Then, the cooling medium flows into the first liquid outlet pipeline through the liquid cooling plate and exchanges heat with the power cables around the periphery of the first liquid outlet pipeline so as to take away heat generated by the power cables, and therefore liquid cooling and heat dissipation of the power cables connected with each group of direct current sockets are achieved.

In one implementation, the electric vehicle further includes a thermal management system, a second liquid inlet pipeline, and a second liquid outlet pipeline; 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 heat management system is used for radiating heat of the power battery.

In the technical scheme, the liquid inlet socket and the liquid outlet socket of the electric vehicle are communicated to the thermal management system by utilizing the second liquid inlet pipeline and the second liquid outlet pipeline, so that the electric vehicle can perform liquid cooling heat dissipation on the power cables connected with each group of direct current sockets by utilizing cooling medium provided by the external cooling system, and can perform liquid cooling heat dissipation on the power battery by utilizing the cooling medium provided by the external cooling system. The electric vehicle high-power charging device is beneficial to meeting the heat dissipation requirements of the power battery and the power cable when the electric vehicle is charged with high power, so that the electric vehicle high-power charging device is beneficial to ensuring the normal running of the electric vehicle high-power charging.

In one implementation, the electric vehicle further includes two three-way valves; three interfaces of a 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 three interfaces of the other 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.

In the above technical scheme, after the cooling medium provided by the cooling system outside the vehicle flows into the electric vehicle through the liquid inlet socket, the cooling medium can be split into two paths through one of the three-way valves, one path of the cooling medium flows into the liquid cooling pipeline to be used for radiating the power cable connected with each group of direct current socket, and the other path of the cooling medium flows into the thermal management system to be used for radiating the power battery. Then, 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 the other three-way valve, and then flow back to the external cooling system of the vehicle again through the liquid outlet socket. Therefore, the cooling medium provided by the vehicle exterior cooling system can be recycled.

In one implementation, the electric vehicle further includes at least one cooling pond, each of the at least one cooling pond including 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; at least one cooling pond is used for radiating heat to each group of direct current sockets.

In the technical scheme, at least one cooling pond is communicated between the liquid inlet socket and the input end of the liquid cooling pipeline, and the at least one cooling pond can utilize cooling medium provided by the external cooling system of the electric vehicle to conduct liquid cooling heat dissipation on each group of direct current sockets, so that the heat dissipation requirement of the electric vehicle during high-power charging can be better met, the charging safety of the electric vehicle is improved, and the normal running of the high-power charging of the electric vehicle is ensured.

In one implementation, the at least one set of dc outlets includes two sets of dc outlets, and the at least one cooling pond includes one cooling pond; the two groups of direct current sockets are arranged along a first direction, and the positive direct current socket and the negative direct current socket 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; one cooling pond is located between two sets of DC sockets along first direction, and one cooling pond includes two surface that set up relatively along first direction, and one surface is towards one set of DC socket in two sets of DC sockets, and another surface is towards another set of DC socket, and one surface is used for with the positive DC socket and the negative DC socket heat conduction contact of one set of DC socket, and another surface is used for with the positive DC socket and the negative DC socket heat conduction contact of another set of DC socket.

Through the design, the cooling medium of the cooling system outside the vehicle flows into the cooling tank through the liquid inlet socket, and exchanges heat with the positive direct current socket and the negative direct current socket of the two groups of direct current sockets through the cooling tank so as to take away heat generated by the two groups of direct current sockets, and liquid cooling heat dissipation of the two groups of direct current sockets is realized.

In one implementation, the electric vehicle further includes a connection confirmation socket, a connection confirmation circuit, and a vehicle interface, the vehicle interface is used for connecting the charging gun, at least one set of the direct current socket, the liquid cooling socket, and the connection confirmation socket are disposed in the vehicle interface, and the connection confirmation socket is connected with 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 by 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 one group of direct current plugs according to the voltage of the detection point in the connection confirmation circuit of the electric vehicle; when the voltage of the detection point reaches a preset value, 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.

In the above-described aspect, since the connection confirmation socket is connected to the connection confirmation circuit of the electric vehicle, the electric vehicle can determine the connection state of the liquid-cooled socket and the liquid-cooled plug, and each group of the dc sockets and the corresponding group of the dc plugs, based on the voltage at the detection point in the connection confirmation circuit. And then under the successful condition of liquid cooling socket and liquid cooling plug connection, when the battery charging outfit carries out high-power charging to electric vehicle, the outside cooling system of car can be to electric vehicle's liquid cooling pipeline transmission cooling medium to realize the heat dissipation of liquid cooling pipeline to power cable. The electric vehicle charging device is beneficial to meeting the heat dissipation requirement of the power cable when the electric vehicle is charged in high power, and improving the charging safety of the electric vehicle, so that the charging device is beneficial to ensuring the normal operation of the charging device on the electric vehicle in high power.

In one implementation, the connection confirmation sockets include a first connection confirmation socket, a second connection confirmation socket, and a third connection confirmation socket, and 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, 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; the electric vehicle is used for confirming the connection state of each group of direct current sockets and one 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.

In the above technical solution, the electric vehicle determines the connection state of the dc socket and the dc plug according to the first connection confirmation circuit or the second connection confirmation circuit, and determines the connection state of the liquid cooling socket and the liquid cooling plug according to the third connection confirmation circuit, that is, the electric vehicle may determine the connection state of the dc socket and the dc plug and the connection state of the liquid cooling socket and the liquid cooling plug based on different connection confirmation circuits, respectively, so as to improve accuracy of determining the connection state.

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

In the above-mentioned 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 identification liquid cooling socket is not connected to the liquid cooling plug. And under the condition that the voltage of the detection point reaches a preset value, the electric vehicle identifies that the liquid cooling socket is connected with the liquid cooling plug. According to the connection state of the liquid cooling socket and the liquid cooling plug of the voltage identification of the detection point, the accuracy of the connection state of the liquid cooling socket and the liquid cooling plug of the electric vehicle identification can be improved.

In one implementation, the electric vehicle further includes an interface housing, the interface housing being sleeved around at least one of the dc outlet, the liquid-cooled outlet, and the connection confirmation outlet to form a 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 the end face of the third connection confirmation socket facing the outer side of the electric vehicle body, the end face of the interface shell is the end face of the interface shell 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.

Therefore, in practical application, the liquid cooling socket of the electric vehicle is connected with the liquid cooling plug of the charging gun first, and the third connection confirmation socket of the electric vehicle is connected with the third connection confirmation plug of the charging gun, so that the electric vehicle can confirm the connection state 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 with the third connection confirmation socket, and the liquid leakage condition between the liquid cooling socket and the liquid cooling plug is avoided.

In one implementation, the electric vehicle further comprises a grounding socket arranged in the interface housing, the grounding socket is connected with the vehicle body grounding platform, and the grounding socket is used for being connected with a grounding 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 vehicle body outer side of the electric vehicle.

Thus, in practical use, the third connection confirmation socket of the electric vehicle is connected with the third connection confirmation plug of the charging gun first, and the second connection confirmation socket of the electric vehicle is connected with the second connection confirmation plug of the charging gun later, or the third connection confirmation socket of the electric vehicle is connected with the third connection confirmation plug of the charging gun, and the second connection confirmation socket of the electric vehicle is connected with the second connection confirmation plug of the charging gun simultaneously. This corresponds to the final full connection confirmation by the charging gun side or the final full connection confirmation by both the charging gun side and the electric vehicle side.

In the above design, the second connection confirmation plug and the second connection confirmation socket are generally connected last in the connection process of each socket of the electric vehicle and each plug of the charging gun specified in the existing charging standard protocol, so that the connection sequence of each socket of the electric vehicle and each plug of the charging gun specified in the existing charging standard protocol can be continuously used. Therefore, the existing charging standard protocol is not changed, and the connection between the liquid cooling socket and the liquid cooling plug and the connection between the third connection confirmation socket and the third connection confirmation plug are added in the existing charging standard protocol, so that the implementation is simpler.

In one implementation, 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 cooling 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 the end face of the first connection confirmation receptacle is an end face of the first connection confirmation receptacle facing an outside of a vehicle body of the electric vehicle.

It will be appreciated that in embodiments of the present application, the connection of the first connection confirmation socket and the first connection confirmation plug of the charging gun may indicate that the charging gun is in a semi-connected state with the vehicle interface, the connection of the second connection confirmation socket and the second connection confirmation plug of the charging gun, and the connection of the third connection confirmation socket and the third connection confirmation plug of the charging gun may indicate that the charging gun is in a fully connected state with the vehicle interface.

In the above technical scheme, in the process of connecting the charging gun with the vehicle interface, the first connection confirmation socket is connected with the first connection confirmation plug first, the liquid cooling socket is connected with the liquid cooling plug again, the second connection confirmation socket is connected with the second connection confirmation plug, and the third connection confirmation socket is connected with the third connection confirmation plug last. Thus, in practical application, the traction device can be designed in the electric vehicle, when the electric vehicle detects that the first connection confirmation socket and the first connection confirmation plug are connected, namely, the charging gun and the vehicle interface are in a semi-connected state, the electric vehicle can control the traction device to traction the charging gun to move so that the liquid cooling socket and the liquid cooling plug are connected first, 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 later, namely, the charging gun and the vehicle interface are completely connected. In the process, the traction device is used for traction the charging gun to move, so that the charging gun and the vehicle interface are in a complete connection state, and a user can not manually push the charging gun, thereby being beneficial to improving user experience.

In one implementation, the electric vehicle further comprises a liquid cooling connection confirmation socket, a liquid cooling connection confirmation circuit and two vehicle interfaces, wherein one vehicle interface is used for being connected with the charging gun, the other vehicle interface is used for being connected with the liquid cooling gun, at least one group of direct current sockets are arranged in one vehicle interface, the liquid cooling socket and the liquid cooling connection confirmation socket are arranged in the other vehicle interface, and the liquid cooling connection confirmation socket is connected with the liquid cooling 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 which is 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.

In the above-described aspect, since the liquid-cooling connection confirmation socket is connected to the liquid-cooling connection confirmation circuit of the electric vehicle, the electric vehicle can determine the connection state of the liquid-cooling socket and the liquid-cooling plug from the voltage at the detection point in the liquid-cooling connection confirmation circuit. And then under the successful condition of liquid cooling socket and liquid cooling plug connection, when the battery charging outfit carries out high-power charging to electric vehicle, the outside cooling system of car can be to electric vehicle's liquid cooling pipeline transmission cooling medium to realize the heat dissipation of liquid cooling pipeline to power cable. The electric vehicle charging device is beneficial to meeting the heat dissipation requirement of the power cable when the electric vehicle is charged in high power, and improving the charging safety of the electric vehicle, so that the charging device is beneficial to ensuring the normal operation of the charging device on the electric vehicle in high power.

In one implementation, the liquid-cooled connection confirmation receptacle includes a first liquid-cooled connection confirmation receptacle, and the liquid-cooled connection confirmation circuit of the electric vehicle includes 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.

In one implementation, the at least one detection point includes a detection point, and the detection point is located between the first resistor unit and the first liquid-cooled connection confirmation socket.

In one implementation, the electric vehicle further includes an interface housing, the interface housing being sleeved around the liquid-cooled socket and the liquid-cooled 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 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.

Therefore, in practical application, the liquid cooling socket of the electric vehicle is connected with the liquid cooling plug of the liquid cooling gun firstly, and the first liquid cooling connection confirmation socket of the electric vehicle is connected with the first liquid cooling connection confirmation plug of the liquid cooling gun, so that the electric vehicle can confirm the connection state 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 with the first liquid cooling connection confirmation socket, and the liquid leakage condition between the liquid cooling socket and the liquid cooling plug is avoided.

In one implementation, the electric vehicle further comprises a grounding socket arranged in the other vehicle interface, the grounding socket is connected with the vehicle body grounding platform, and the grounding socket is used for being connected with a grounding plug of the liquid cooling gun; the liquid-cooling connection confirmation socket comprises a second liquid-cooling connection confirmation socket, and 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 of the two detection points 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.

In the above technical solution, by setting two detection points in the liquid-cooling connection confirmation circuit of the electric vehicle and enabling the electric vehicle to identify the connection state 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 state of the liquid-cooling socket and the liquid-cooling plug can be further improved.

In one implementation, the electric vehicle further includes an interface housing, the interface housing being sleeved around the liquid-cooled socket, the liquid-cooled connection confirmation socket, and the ground 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 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.

Therefore, in practical application, the liquid cooling socket of the electric vehicle and the liquid cooling plug of the charging gun are connected firstly, 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 and 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, so that the electric vehicle can confirm the connection state 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 with the first liquid cooling connection confirmation socket and the second liquid cooling connection confirmation circuit connected with the second liquid cooling connection confirmation socket, and the liquid leakage condition between the liquid cooling socket and the liquid cooling plug is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a charging system according to an embodiment of the present application.

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

Fig. 3 to fig. 5 are schematic structural diagrams of a charging system according to an embodiment of the application.

Fig. 6 is a schematic structural diagram of a charging pile according to an embodiment of the present application.

Fig. 7 is a schematic diagram of the mating of the charging gun and the off-board cooling system in the charging stake of fig. 6.

Fig. 8 is a schematic structural view of another charging pile according to an embodiment of the present application.

Fig. 9 is a schematic diagram of the mating of the charging gun and pile tip cooling system in the charging pile of fig. 8.

Fig. 10 is a schematic structural view of another charging pile according to an embodiment of the present application.

Fig. 11 to 13 are schematic structural views of an electric vehicle according to an embodiment of the present application.

Fig. 14 is a schematic view showing the cooperation of the cooling pool and the dc outlet in the electric vehicle shown in fig. 13.

Fig. 15 is a schematic structural view of another electric vehicle according to an embodiment of the present application.

Fig. 16 to 19 are schematic structural diagrams of a heat dissipation system according to an embodiment of the application.

Fig. 20 is a schematic structural diagram of a charging system according to an embodiment of the present application.

FIG. 21 is a schematic diagram of an interface between a liquid-cooled gun and an electric vehicle according to an embodiment of the present application.

Fig. 22 to 24 are schematic structural diagrams of a charging system according to an embodiment of the application.

Fig. 25 is a schematic diagram of an interface between a charging gun and an electric vehicle according to an embodiment of the present application.

Detailed Description

Before describing embodiments of the present application, the following description is made to facilitate understanding of the embodiments of the present application.

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

In embodiments of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second" may include one or more features judiciously or implicitly. In addition, in the description of the embodiments of the present application, "plurality" means two or more, and "at least one" and "one or more" mean one, two or more.

In the description of the embodiments of the present application, unless otherwise specified, "and/or" is merely an association relationship describing an association object, meaning that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone.

Technical terms related to the embodiments of the present application are briefly described below to facilitate the subsequent understanding of the embodiments of the present application.

Thermal management system (THERMAL MANAGEMENT SYSTEM, TMS): the system is an important component of an electric vehicle and mainly comprises three parts of an air conditioner thermal management system, a motor, an electric control cooling system and a battery thermal management system, and is used for providing required cold and heat for a passenger cabin, a power battery, the motor, an air conditioner and the like so as to thermally manage the management objects, so that the temperature of the management objects is maintained within a normal operation range.

The technical scheme of the application will be described below with reference to the accompanying drawings.

Firstly, in order to facilitate understanding of the technical scheme provided by the embodiment of the present application, an application scenario to which the embodiment of the present application is applicable is described first.

Fig. 1 schematically illustrates a structure of a charging system 100 according to an embodiment of the present application.

In conjunction with (a) and (b) of fig. 1, the charging system 100 may include a charging peg 110 and an electric vehicle 120. The charging pile 110 is configured to receive an ac power output by the external power grid 200, convert the ac power into a stable dc power, and transmit the stable dc power to the electric vehicle 120, so as to charge the electric vehicle 120. Or the electric vehicle 120 may also output electric power back to the external grid 200 through the charging stake 110.

In some embodiments, as shown in fig. 1 (a), the charging stake 110 is a split charging stake. Specifically, the charging stake 110 includes a charging device 111, at least one charging terminal 112, and at least one charging gun 113. Wherein the charging device 111 is connected with each charging terminal 112, each charging terminal 112 is connected with a charging gun 113 through a cable, and each charging gun 113 is used for being connected with the electric vehicle 120. In particular implementations, one charging terminal 112 may be coupled to one or more charging guns 113.

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

Charging terminal 112 may include a housing, a human-machine interface, a charging control unit, a metering charging unit, etc., and may be used for information interaction, energy transfer, metering charging, etc., with electric vehicle 120.

The electric vehicle 120 may be a vehicle that is driven to travel with electric energy. The electric vehicle 120 may be a pure electric vehicle (pure ELECTRIC VEHICLE/battery ELECTRIC VEHICLE, pure EV/battery EV), a Hybrid ELECTRIC VEHICLE (HEV), a Range Extended ELECTRIC VEHICLE (REEV), a plug-in hybrid ELECTRIC VEHICLE (PHEV), or the like.

In other embodiments, as shown in (b) of fig. 1, the charging stake 110 is an integral charging stake. Specifically, the charging stake 110 may directly set the man-machine interface, the charging control unit, the metering charging unit, and the like in the charging device 111, so that the charging stake 110 includes only the charging device 111 and at least one charging gun 113 connected with the charging device 111, excluding the charging terminal 112. The plurality of charging modules in the charging device 111 convert ac power from the external power grid 20 into stable dc power and then directly transmit the converted dc power to the electric vehicle 120 through the charging gun 113.

Fig. 2 is a schematic diagram illustrating an example of a charging pile 110 for charging an electric vehicle 120 according to an embodiment of the present application.

Referring to fig. 2, a dc plug 1131 of the charging gun 113 is connected to a plurality of charging modules 1111 in the charging apparatus 111, and a dc outlet 121 of the electric vehicle 120 is connected to the power battery 122. In the case where the dc plug 1131 is connected to the dc outlet 121, the plurality of charging modules 1111 output dc power to the dc outlet 121 through the dc plug 1131, and the dc outlet 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 background section above, as the requirement of the user on the charging time of the electric vehicle 120 increases, the charging power output by the plurality of charging modules 1111 to the dc outlet 121 through the dc plug 1131 increases, that is, the charging power transmitted to the power battery 122 by the power cable 123 increases, so as to implement high-power charging of the electric vehicle 120 by the charging pile 110, for example, implement overcharging of the electric vehicle 120 by the charging pile 110.

However, in the current practical application, since the charging voltage is generally high, the power cable 123 connected between the dc outlet 121 and the power battery 122 mostly adopts a high voltage harness with an operating voltage greater than 60V. Along with the larger and larger charging power, the heat generated by the high-voltage wire harness increases substantially, and if the heat cannot be discharged in time, the safety problem may occur in the process of charging the electric vehicle 120 with high power by the charging pile 110, thereby affecting the normal operation of high-power charging of the electric vehicle 120.

Although electric vehicle 120 is typically provided with a thermal management system, it may provide some cooling for the heat dissipation of the high voltage wiring harness. However, with the increase of the charging power, for example, in the case of overcharging, in addition to the heat generated by the high-voltage harness, the heat generated by the power battery 122 is greatly increased, and the thermal management system needs to radiate the heat for both the high-voltage harness and the power battery 122, and the cooling capacity of the thermal management system itself is limited, which may not meet the heat radiation requirements of both the high-voltage harness and the power battery 122.

Some electric vehicles 120 currently add a cooling system to dissipate heat from a high voltage harness connected between the dc outlet 121 and the power battery 122 when the power battery 122 is charged with high power. However, the additional cooling system occupies the space of the electric vehicle 120, increases the weight and manufacturing cost of the whole vehicle, and makes the development of the whole vehicle system of the electric vehicle 120 difficult. In addition, the additional cooling system is not used when the power battery 122 is charged with high power, and is in an idle state under other working conditions, so that the utilization rate of the cooling system is low.

Based on the foregoing, an embodiment of the present application provides an electric vehicle, which includes at least one set of a dc outlet, a liquid-cooled outlet, a power battery, and a liquid-cooled 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 the vehicle exterior cooling system to the liquid cooling pipeline. The liquid cooling pipeline is used for radiating power cables connected with each group of direct current sockets.

In the electric vehicle provided by the embodiment of the application, the liquid cooling pipeline can be communicated with the external cooling system through the liquid cooling socket, so that when the power battery is charged in a high power mode through the charging equipment, the liquid cooling pipeline can conduct liquid cooling heat dissipation on the power cable connected between each group of direct current socket and the power battery by using the cooling medium provided by the external cooling system, so that the heat dissipation requirement of the power cable when the power battery is charged in a high power mode is met, the charging safety of the electric vehicle is improved, and the electric vehicle is facilitated to ensure the normal high-power charging of the electric vehicle.

The embodiment of the application also provides a charging pile, which comprises charging equipment and an external cooling system, wherein when the charging equipment charges the electric vehicle with high power, the external cooling system can convey cooling medium to the electric vehicle, so that the electric vehicle can utilize the received cooling medium to perform liquid cooling heat dissipation on a power cable connected between a direct-current socket and a power battery, thereby being beneficial to meeting the heat dissipation requirement of the power cable when the electric vehicle charges with high power and ensuring the normal performance of the charging equipment on the high-power charging of the electric vehicle.

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

For convenience of understanding, in the drawings provided in the embodiments of the present application, a power transmission line is represented by a solid line connection, a pipe connection line is represented by a short-dashed line connection, and a signal transmission line is represented by a short-line-dot.

Fig. 3 and fig. 4 are schematic structural diagrams of a charging system 300 according to an embodiment of the application.

Referring to fig. 3 and 4, the charging system 300 includes a charging stake 400 and an electric vehicle 500.

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

Among them, 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 apparatus 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. Electric vehicle 500 includes at least one set of dc outlet 510, power cell 520, liquid cooled outlet 530, and liquid cooled conduit 540.

The plurality of charging modules 411 are connected to at least one set of dc plugs 431. At least one set of dc plugs 431 is in one-to-one correspondence with at least one set of dc sockets 510, each set of dc plugs 431 is used for connecting with a corresponding set of dc sockets 510, and each set of dc sockets 510 is connected with the power battery 520 through the power cable 550.

In the case that each set of the dc plugs 431 is connected to a corresponding set of the dc sockets 510, the dc power output from the plurality of charging modules 411 in the charging device 410 may be delivered to the power battery 520 through the connected dc plugs 431 and dc sockets 510 to charge the power battery 520.

It should be appreciated that in embodiments of the present application, each set of DC plugs 431 includes a positive DC plug dc+ and a negative DC plug DC-, and each set of DC outlets 510 includes a positive DC outlet dc+ and a negative DC outlet DC-, with a plurality of power cables 550. Wherein the positive DC plug DC and the negative DC plug DC-in each set of DC plugs 431 are used to connect the positive DC socket dc+ and the negative DC socket DC-in the corresponding set of DC sockets 510, respectively. The positive DC outlet dc+ and the negative DC outlet DC-in each set of DC outlets 510 are each connected to the power battery 520 by a power cable 550.

In the embodiment of the present application, in the case that the charging gun 430 includes multiple sets of dc plugs 431, the multiple charging modules 411 in the charging device 410 may output dc to the power battery 520 of the electric vehicle 500 through the multiple sets of dc plugs 431 at the same time, so as to improve the charging power output by the multiple charging modules 411 of the charging device 410 to the power battery 520, which is beneficial to implementing high-power charging of the electric vehicle 500 by the charging pile 400.

With continued reference to fig. 3 and 4, the liquid-cooled plug 441 is configured to communicate with the liquid-cooled receptacle 530, and the liquid-cooled plug 441 is configured to communicate with the off-board cooling system 420, and the liquid-cooled receptacle 530 is configured to communicate with the liquid-cooled conduit 540. The liquid cooling pipeline 540 is used for radiating heat to the power cables 550 connected to each set of dc outlets 530.

Specifically, in the case where the liquid cooling plug 441 is in communication with the liquid cooling receptacle 530, the cooling medium of the off-vehicle cooling system 420 may be output to the liquid cooling receptacle 530 through the liquid cooling plug 441, and the liquid cooling receptacle 530 is configured to convey the received cooling medium to the liquid cooling pipe 540, so that the liquid cooling pipe 540 can exchange heat with the power cable 550 connected to each set of dc receptacles 510 by using the cooling medium provided by the off-vehicle cooling system 420, thereby dissipating heat from the power cable 550 connected to each set of dc receptacles 510.

It is understood that in embodiments of the present application, the cooling medium may be cooling water or chilled water, or the like.

It is also understood that the off-board cooling system 420 may be disposed external to the charging device 410, or the off-board cooling system 420 may be integrated within the charging device 410.

For example, in some embodiments, as shown in fig. 3, the charging device 410 includes a case (not shown), in which a plurality of charging modules 411 are accommodated, and the off-vehicle cooling system 420 is disposed outside the case. The charging gun 430 is connected to a charging terminal (not shown in the drawings) and is connected to a plurality of charging modules 411 in the case through the charging terminal. The liquid cooling gun 440 may be connected to the charging terminal and communicate with the off-board cooling system 420 outside the tank through the charging terminal; alternatively, the liquid cooling gun 440 may be directly connected to the off-board cooling system 420 outside the tank.

In other embodiments, as shown in fig. 4, a plurality of charging modules 411 and an off-board cooling system 420 are each housed within a housing of a charging device 410. The charging gun 430 and the liquid cooling gun 440 are both connected to a charging terminal, and are respectively connected to the plurality of charging modules 411 in the box and the off-vehicle liquid cooling system 420 through the charging terminal.

In particular implementations, and with continued reference to fig. 3 and 4, the electric vehicle 500 may include two vehicle interfaces, namely vehicle interface M1 and vehicle interface M2, with at least one set of dc outlets 510 disposed in one vehicle interface M1 and a liquid cooled outlet 530 disposed in the other vehicle interface M2. One vehicle interface M1 is for connection with the charging gun 430 and the other vehicle interface M2 is for connection with the liquid cooled gun 440.

The above-mentioned non-details of the charging pile 400 can be found in the related description of the embodiment shown in fig. 1, and will not be repeated here.

In the embodiment of the present application, while the charging device 410 performs high-power charging on the power battery 520 of the electric vehicle 500 through the charging gun 430, the off-board cooling system 420 may 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 may perform liquid cooling heat dissipation on the power cable 550 connected to each set of dc sockets 510 by using the cooling medium provided by the off-board cooling system 420. This is advantageous in satisfying the heat dissipation requirement of the power cable 550 when the electric vehicle 500 is charged with high power, thereby improving the charging safety of the electric vehicle 500 to ensure the normal running of the charging apparatus 410 for charging the electric vehicle 500 with high power.

For example, when the charging device 410 performs high-power overcharging on the electric vehicle 500, the electric vehicle 500 can perform liquid cooling heat dissipation on the power cable connected to each set of dc sockets 510 by using the cooling medium provided by the external cooling system 420, so as to meet the heat dissipation requirement of the power cable 550 when the electric vehicle 500 performs overcharging, so as to ensure that the charging device 410 performs normal overcharging on the electric vehicle 500. Further, the charging device 410 is advantageous in realizing a charging speed of one second for one kilometer, that is, in realizing electric power for charging the electric vehicle 500 for 1 second for 1 kilometer. It is understood that overcharging may refer to the maximum output power of a single gun being greater than or equal to a preset power, which may be 250kW, for example.

In addition, since the electric vehicle 500 radiates heat to the power cable 550 connected to each set of dc sockets 510 by using the external cooling system 420, the cooling system of the power cable 550 can be not additionally added in the electric vehicle 500, which is beneficial to avoiding the increase of the weight of the whole vehicle and reducing the manufacturing cost of the electric vehicle 500 and the development difficulty of the whole vehicle system.

With continued reference to fig. 3 and 4, in some embodiments, to achieve a circulating flow of cooling medium of the off-board cooling system 420 between the off-board cooling system 420 and the liquid cooling line 540, the liquid cooling plug 441 may include a liquid inlet plug 4411 and a liquid outlet plug 4412, and the liquid cooling receptacle 530 may include a liquid inlet receptacle 531 and a liquid outlet receptacle 532.

Wherein, liquid inlet plug 4411 is used for communicating with liquid outlet socket 532, liquid outlet plug 4412 is used for communicating with liquid outlet socket 531, and liquid inlet plug 4411 communicates with liquid outlet plug 4412 through vehicle exterior cooling system 420, and liquid outlet socket 531 communicates with liquid outlet socket 532 through liquid cooling pipeline 540. Thus, a circulation circuit is formed between the off-vehicle cooling system 420 and the liquid cooling line 540, and the cooling medium of the off-vehicle cooling system 420 can circulate through the circulation circuit.

In the case where the liquid inlet plug 4411 communicates with the liquid outlet socket 532 and the liquid outlet plug 4412 communicates with the liquid outlet socket 531, the cooling medium of the off-vehicle cooling system 420 flows into the liquid cooling pipe 540 through the liquid outlet plug 4412 and the liquid inlet socket 531, and exchanges heat with the power cables 550 connected to each set of dc sockets 510, so as to take away heat generated by the power cables 550 connected to each set of dc sockets 510. The cooling medium carrying heat flows again into the off-board cooling system 420 through the outlet receptacle 532 and the inlet plug 4411. The cooling system 420 outside the vehicle is used for cooling the cooling medium carrying heat, and the cooled cooling medium continuously flows into the liquid cooling pipeline 540 through the liquid outlet plug 4412 and the liquid inlet socket 531, so that the cooling medium can be recycled.

Fig. 5 is a schematic structural diagram of another charging system 300 according to an embodiment of the present application.

Unlike the embodiment shown in fig. 3 and 4, in the embodiment shown in fig. 5, the charging stake 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. Wherein, the charging gun 430 comprises at least one group of a direct current plug 431 and a liquid cooling plug 432. The plurality of 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 is in one-to-one correspondence with at least one set of dc sockets 510 of the electric vehicle 500, and each set of dc plugs 431 is used for connecting with a corresponding set of dc sockets 510. The off-board cooling system 420 communicates with a liquid-cooled plug 432, the liquid-cooled plug 432 being configured to communicate with a liquid-cooled outlet 530 of the electric vehicle 500.

In particular implementations, electric vehicle 500 may include only one vehicle interface M1, with at least one set of DC outlet 510 and liquid-cooled outlet 530 each disposed in one vehicle interface M1. A vehicle interface M1 is used to connect with the charging gun 430.

Details of the charging system 300 are not described in detail herein, and reference is made to the embodiments shown in fig. 3 and 4.

In the embodiment of the present application, while the charging device 410 performs high-power charging on the power battery 520 of the electric vehicle 500 through the charging gun 430, the off-board cooling system 420 may 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 may perform liquid cooling heat dissipation on the power cable 550 connected to each set of dc sockets 510 by using the cooling medium provided by the off-board cooling system 420. This is advantageous in satisfying the heat dissipation requirement of the power cable 550 when the electric vehicle 500 is charged with high power, and improving the charging safety of the electric vehicle 500, thereby being advantageous in ensuring the normal operation of the charging device 410 for charging the electric vehicle 500 with high power.

With continued reference to fig. 5, in some embodiments, similar to the embodiments shown in fig. 3 and 4, to achieve circulation of cooling medium of the off-board cooling system 420 between the off-board cooling system 420 and the liquid cooling line 540, the liquid cooling plug 432 may include a liquid inlet plug 4321 and a liquid outlet plug 4322, and the liquid cooling receptacle 530 may include a liquid inlet receptacle 531 and a liquid outlet receptacle 532.

Wherein, liquid inlet plug 4321 is used for communicating with liquid outlet socket 532, liquid outlet plug 4322 is used for communicating with liquid outlet socket 531, liquid inlet plug 4321 communicates with liquid outlet plug 4322 through vehicle exterior cooling system 420, and liquid outlet socket 531 communicates with liquid outlet socket 532 through liquid cooling pipeline 540. Thus, a circulation circuit is formed between the off-vehicle cooling system 420 and the liquid cooling line 540, and the cooling medium of the off-vehicle cooling system 420 can circulate through the circulation circuit.

A specific description of the circulation of the cooling medium in the circulation circuit of the off-vehicle cooling system 420 can be found in the embodiment shown in fig. 3 and 4, and will not be repeated here.

The structures of the charging pile 400 and the electric vehicle 500 in the charging system 300 are described in further detail below.

Fig. 6 is a schematic structural diagram of a charging pile 400 according to an embodiment of the present application. Fig. 7 is a schematic diagram illustrating the cooperation of the charging gun 430 shown in fig. 6 and the off-vehicle cooling system 420.

Referring to fig. 6, taking the example that the charging pile 400 shown in fig. 5 includes the charging gun 430 and does not include the liquid cooling gun 440, in some embodiments, the off-vehicle cooling system 420 is disposed in the box of the charging device 410 and may be used to dissipate heat of the heat generating device on the charging pile 400 side, for example, to perform liquid cooling heat dissipation on the plurality of charging modules 411 and the charging gun 430 in the charging device 410. This is advantageous to meet the heat dissipation requirements of the charging stake 400 when overcharging the electric vehicle 500, so that the charging device 410 is advantageous to achieve a charging speed of one kilometer per second, thereby providing a user with a "one cup coffee, full charge start" charging experience. That is, the charging pile 400 may be a full liquid cooled super-charging pile.

In one example, referring to fig. 6 and 7, taking the vehicle exterior cooling system 420 for liquid cooling the charging gun 430 as an example, the charging gun 430 further includes a charging gun head 433 and a liquid cooling cable 434. The liquid cooled cable 434 includes a liquid cooled cable outer tube 4341, a cable 4342, and a gun wire liquid cooled conduit 4343.

Wherein at least one set of dc plug 431 and liquid cooled plug 432 is located in charging gun head 433. The liquid cooling cable outer tube 4341 is wrapped around the cable 4342 and the gun wire liquid cooling pipeline 4343, and the liquid cooling cable outer tube 4341 can be used for accommodating the protection cable 4342 and the gun wire liquid cooling pipeline 4343. The plurality of 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 by a cable 4322. The input end of the gun wire liquid cooling pipeline 4343 is communicated with the output end of the vehicle exterior cooling system 420, and the output end of the gun wire liquid cooling pipeline 4343 is communicated with the input end of the vehicle exterior cooling system 420. The outer circumference of the cable 4342 is covered with an insulating layer to insulate and protect the cable 4342. The gun wire liquid cooling pipeline 4343 is coated on the periphery of the insulating layer.

In a specific implementation, the cooling medium in the off-board cooling system 420 flows into the gun line liquid cooling line 4343 through the input end of the gun line liquid cooling line 4343. The cooling medium in the gun wire liquid cooling pipeline 4343 exchanges heat with the cable 4342 through the insulating layer so as to take away heat generated by the cable 4342, and liquid cooling and heat dissipation of the cable 4342 are realized. The heat-carrying cooling medium again flows back to the off-board cooling system 420 through the output of the gun wire liquid cooling line 4343. The cooling system 420 outside the vehicle is configured to cool the cooling medium carrying heat, and convey the cooled cooling medium to the gun wire liquid cooling pipeline 4343 again, so as to realize recycling of the cooling medium.

With continued reference to fig. 7, in some embodiments, the charging gun 430 further includes a cooling bath 435 and the gun line liquid cooling line 4343 includes a gun line liquid inlet line a1 and a gun line liquid outlet line a2. Wherein the cooling pool 435 is located within the charging gun head 433. The gun line liquid inlet pipeline a1 is coated on the periphery of the cable 4342. The input end of the gun line liquid inlet pipeline a1 is used as the input end of the gun line liquid cooling pipeline 4343 and is used for being communicated with the output end of the vehicle external cooling system 420. The output end of the gun line liquid outlet pipeline a2 is used as the output end of the gun line liquid cooling pipeline 4343 and is used for being communicated with the input end of the vehicle external cooling system 420. The output end of the gun line liquid inlet pipeline a1 is communicated with the input end of the gun line liquid outlet pipeline a2 through the cooling pool 435, so that 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 flows into the vehicle external cooling system 420 through the gun line liquid outlet pipeline a2, and circulation of the cooling medium is realized.

In one example, the cooling pool 435 can be in thermally conductive contact with at least one set of dc plugs 431 within the charging gun head 433. In this way, in the process that 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 exchange heat with at least one group of the direct current plugs 431 in the charging gun head 433 so as to take away the heat generated by the at least one group of the direct current plugs 431, and liquid cooling heat dissipation of the at least one group of the direct current plugs 431 is realized.

It should be noted that the specific structure of the above-mentioned liquid cooling cable 434 is only illustrative, and it can be flexibly adjusted according to actual production and design requirements. For example, in other embodiments, the cable 4342 in the liquid cooled cable 434 may also be wrapped around the outer circumference of the gun wire liquid cooled conduit 4343.

In the embodiment of the application, the external cooling system 420 can be used for radiating the power cable 550 in the electric vehicle 500, and also can be used for radiating the heating device at the charging pile 400 side, for example, the charging gun 430, so that the heat radiation requirement of the charging gun 430 in working can be met, and the utilization rate of the external cooling system 420 can be improved.

With continued reference to fig. 6, in some embodiments, charging pile 400 further includes pile end liquid inlet line 451 and pile end liquid outlet line 452. The liquid inlet plug 4321 in the liquid cooling plug 432 is communicated with the input end of the vehicle exterior cooling system 420 through a pile end liquid inlet pipeline 451, and the liquid outlet plug 4322 in the liquid cooling plug 432 is communicated with the output end of the vehicle exterior cooling system 420 through a pile end liquid outlet pipeline 452.

Illustratively, referring to fig. 6, pile end liquid inlet pipe 451 and pile end liquid outlet pipe 452 are disposed in liquid cooled cable outer pipe 4341, i.e., pile end liquid inlet pipe 451 and pile end liquid outlet pipe 452 are integrated in liquid cooled cable 434. That is, the charging gun head 433 can be connected with the plurality of charging modules 411 in the charging device 410 and the off-vehicle cooling system 420 through the liquid cooling cable 434, and the connection structure is simpler and more regular.

Fig. 8 is a schematic structural diagram of another charging pile 400 according to an embodiment of the present application. Fig. 9 is a schematic diagram illustrating the cooperation of the charging gun 430 and the pile tip cooling system 460 shown in fig. 8.

Unlike the embodiment shown in fig. 6, in the embodiment shown in fig. 8, the charging pile 400 includes a pile end cooling system 460 in addition to an off-vehicle cooling system 420. The pile end cooling system 460 is disposed in the casing of the charging device 410, and the off-vehicle cooling system 420 is disposed outside the casing of the charging device 410. Pile end cooling system 460 may be used to liquid-cool heat-sink heat-generating devices on the side of charging pile 400, such as plurality of charging modules 411 in charging apparatus 410, and charging gun 430.

For example, with reference to fig. 8 and 9, the input end of gun line liquid cooling circuit 4343 communicates with the output end of pile end cooling system 460, and the output end of gun line liquid cooling circuit 4343 communicates with the input end of pile end cooling system 460. In this way, the gun wire liquid cooling pipeline 4343 can exchange heat with the cable 4342 by using the cooling medium provided by the pile end cooling system 460 to take away the heat generated by the cable 4342, so as to realize liquid cooling and heat dissipation of the cable 4342.

For a specific description of the liquid cooling of the cable 4342 by the pile end cooling system 460, reference is made to the above description of the liquid cooling of the cable 4342 by the off-board cooling system 420, which is not repeated here.

In the embodiment of the application, the charging pile 400 is provided with two independent cooling systems, namely an off-vehicle cooling system 420 and a pile end cooling system 460, so that the power cable 550 in the electric vehicle 500 is radiated through the off-vehicle cooling system 420, and the heating devices at the side of the charging pile 400 are radiated through the pile end cooling system 460, so that the two cooling systems are respectively and independently carried out, the mutual influence is avoided, and the respective radiating effect is ensured.

With continued reference to fig. 8, in one example, similar to the embodiment shown in fig. 6, pile end liquid inlet line 451 and pile end liquid outlet line 452 can also be provided in liquid cooled cable outer tube 4341, i.e., pile end liquid inlet line 451 and pile end liquid outlet line 452 are integrated in liquid cooled cable 434. That is, the charging gun head 433 can be connected with the plurality of charging modules 411, the pile end cooling system 460 and the off-vehicle cooling system 420 outside the charging device 410 by the liquid cooling cable 434, so that the connection structure is simpler and more regular.

In another example, referring to fig. 10, fig. 10 is a schematic structural diagram of another charging pile 400 according to an embodiment of the present application. Unlike the embodiment shown in fig. 8, in the embodiment shown in fig. 10, the charging gun 430 further includes a pipe cable outer tube that is wrapped around the outer circumferences of the pile end liquid inlet pipe 451 and the pile end liquid outlet pipe 452 to form a pipe cable 436. That is, the charging gun head 433 is connected to the plurality of charging modules 411 and the tip cooling system 460 in the charging device 410 through the liquid cooling cable 434, and is connected to the off-vehicle cooling system 420 outside the charging device 410 through the pipe cable 436.

In this way, the two sets of cooling systems are connected with the charging gun head 433 through different cables, so that it is beneficial to ensure that the heat dissipation of the power cable 550 of the electric vehicle 500 by the off-vehicle cooling system 420 and the heat dissipation of the charging gun 430 by the pile end cooling system 460 are performed independently, and mutual influence is avoided.

The specific description of the charging pile 400 in the charging system 300 according to the embodiment of the present application is further described above with reference to the accompanying drawings, and the structure of the electric vehicle 500 in the charging system 300 is further described below.

Fig. 11 and 12 are schematic structural views of an electric vehicle 500 according to an embodiment of the present application.

Referring to fig. 11 and 12, in some embodiments, taking the electric vehicle 500 shown in fig. 5 as an example, the electric vehicle 500 includes only one vehicle interface M1, the electric vehicle 500 includes at least one set of a dc outlet 510, a power battery 520, a liquid-cooled outlet 530, and a liquid-cooled pipeline 540, and both a liquid inlet 531 and a liquid outlet 532 are disposed in the vehicle interface M1. 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 connected to the liquid outlet plug 4322 of the charging gun 430 shown in fig. 5, and the liquid outlet socket 532 is connected to the liquid inlet plug 4321 of the charging gun 430 shown in fig. 5. Thus, the cooling medium of the off-vehicle cooling system 420 may flow into the liquid cooling line 540 through the liquid inlet receptacle 531 and out of the liquid cooling line 540 through the liquid outlet receptacle 531.

In addition, the liquid cooling pipeline 540 is wrapped around the periphery of the power cable 550 connected to each group of dc sockets 510; or each set of power cables 550 connected to the dc outlets 510 is wrapped around the periphery of the liquid cooling tube 540. In this way, the cooling medium can exchange heat with the power cables 500 connected to each group of the dc sockets 510 during the flowing process of the liquid cooling pipeline 540, so as to take away the heat generated by the power cables 550, and realize liquid cooling and heat dissipation of the power cables 550.

For example, in some embodiments, as shown in fig. 11, the liquid cooling pipeline 540 is wrapped around the periphery of the power cable 550 to which each set of dc outlets 510 is connected. Specifically, for example, electric vehicle 500 includes a set of DC outlets 510a, DC outlets 510a include a positive DC outlet dc+ and a negative DC outlet DC-, and liquid cooling line 540 includes a first liquid inlet line 541 and a first liquid outlet line 542.

Wherein positive DC outlet dc+ is connected to power battery 520 via power cable 550a+, and negative DC outlet DC-is connected to power battery 520 via power cable 550 a-. The first liquid inlet pipeline 541 is wrapped around the outer periphery of one of the power cable 550a+ and the power cable 550a-, and the first liquid outlet pipeline 542 is wrapped around the outer periphery of the other of the power cable 550a+ and the power cable 550 a-. For example, fig. 11 illustrates that the first liquid inlet pipe 541 is wrapped around the outer periphery of the power cable 550a+, and the first liquid outlet pipe 542 is wrapped around the outer periphery of the power cable 550 a-.

In addition, the output end of the first liquid inlet pipe 541 is connected to the input end of the first liquid outlet pipe 542, and the input end of the first liquid inlet pipe 541 is used as the input end of the liquid cooling pipe 540 to be connected to the liquid inlet socket 531, and the output end of the first liquid inlet pipe 541 is used as the output end of the liquid cooling pipe 540 to be connected to the liquid outlet socket 532.

It will be appreciated that the outer peripheries of power cable 550a+ and power cable 550 a-are typically coated with an insulating layer, respectively, to provide insulating protection for power cable 550a+ and power cable 550 a-. The first liquid inlet pipeline 541 and the first liquid outlet pipeline 542 are wrapped around the outer periphery of the insulating layer.

In the embodiment, referring to fig. 5 and 11, the cooling medium of the external cooling system 540 flows into the first liquid inlet pipe 541 through the liquid outlet plug 4322 and the liquid inlet socket 531. The cooling medium exchanges heat with the power cable 550a+ connected with the positive direct current socket dc+ in the flowing process of the first liquid inlet pipeline 541, so as to take away heat generated by the power cable 550a+ and realize liquid cooling heat dissipation of the power cable 550 a+. Then, the cooling medium flows into the first liquid outlet pipeline 542, and exchanges heat with the power cable 550 a-connected with the negative direct current socket DC-in the flowing process of the first liquid outlet pipeline 542, so as to take away heat generated by the power cable 550 a-and realize liquid cooling heat dissipation of the power cable 550 a-. Finally, the cooling medium again flows back to the off-board cooling system 420 through the outlet receptacle 531 and the inlet plug 4321 to carry the heat generated by the power cables 550a+ and 550 a-out of the electric vehicle 500.

It is understood that the specific structure of the liquid cooling pipeline 540 covering the dc outlet 510 is only illustrative. For example, in other embodiments, when electric vehicle 500 includes two sets of DC outlets 510, first fluid inlet line 541 may wrap around the outer perimeter of positive DC outlet dc+ and negative DC outlet DC-connected power cable 550 of one set of DC outlets 510, and first fluid outlet line 542 wraps around the outer perimeter of positive DC outlet dc+ and negative DC outlet DC-connected power cable 550 of the other set of DC outlets 510.

Further, in one example, the electric vehicle 500 further includes a liquid cooling plate 560, and the output end of the first liquid inlet pipe 541 is in communication with the input end of the first liquid outlet pipe 542 through the liquid cooling plate 560. Specifically, the liquid cooling plate 560 is provided with a liquid cooling passage, an inlet of which communicates with an output end of the first liquid inlet pipe 541, and an outlet of which communicates with an input end of the first liquid outlet pipe 542.

In the embodiment of the present application, by communicating the liquid cooling plate 560 between the first liquid inlet pipe 541 and the first liquid outlet pipe 542, on the one hand, the first liquid inlet pipe 541 and the first liquid outlet pipe 542 may be communicated; on the other hand, the liquid cooling channel of the liquid cooling plate 560 corresponds to a part of the liquid cooling pipeline 540, which is advantageous in 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 to be understood that the structure that the output end of the first liquid inlet pipe 541 and the input end of the first liquid outlet pipe 542 are communicated by the liquid cooling plate 560 is merely illustrative. In other embodiments, the output end of the first liquid inlet pipe 541 and the input end of the first liquid outlet pipe 542 may also be connected by other pipe structures.

In other embodiments, referring to fig. 12, the power cable 550 connected to each set of dc outlets 510 is wrapped around the periphery of the liquid cooling pipeline 540. Specifically, as shown in fig. 12, taking an electric vehicle 500 as an example, the electric vehicle 500 includes a set of DC sockets 510a, 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.

Wherein positive DC outlet dc+ is connected to power battery 520 via power cable 550a+, and negative DC outlet DC-is connected to power battery 520 via power cable 550 a-. One of the power cable 550a+ and the power cable 550 a-surrounds the outer periphery of the first liquid inlet pipe 541, and the other of the power cable 550a+ and the power cable 550 a-surrounds the outer periphery of the first liquid outlet pipe 542. For example, fig. 12 illustrates that the power cable 550a+ surrounds the outer periphery of the first liquid inlet pipe 541, and the power cable 550 a-surrounds the outer periphery of the first liquid outlet pipe 542.

When the power cable 550 surrounds the periphery of the liquid cooling pipeline 540, the heat dissipation process of the liquid cooling pipeline 540 for heat dissipation of the power cable 550 is similar to that of the liquid cooling pipeline 540 shown in fig. 11 when the periphery of the power cable 550 is covered by the liquid cooling pipeline 540, and the detailed description will be omitted herein.

It is understood that the specific configuration of the power cable 550 surrounding the liquid cooling line 540 is merely illustrative. For example, in some other embodiments, when electric vehicle 500 includes two sets of DC outlets 510, positive DC outlet dc+ and negative DC outlet DC-connected power cables 550 of one set of DC outlets 510 are wrapped around the outer perimeter of first fluid inlet line 541, and positive DC outlet dc+ and negative DC outlet DC-connected power cables 550 of the other set of DC outlets 510 are wrapped around the outer perimeter of first fluid outlet line 542.

Further, in one example, the electric vehicle 500 further includes a liquid cooling plate 560, and the output end of the first liquid inlet pipe 541 is in communication with the input end of the first liquid outlet pipe 542 through the liquid cooling plate 560. The specific description may refer to the embodiment shown in fig. 11, and will not be repeated here.

Fig. 13 is a schematic structural diagram of another electric vehicle 500 according to 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 12, and the differences between the two will be mainly described below.

Referring to fig. 13, in some embodiments, the electric vehicle 500 further includes at least one cooling reservoir 570. Wherein, each cooling pond 570 includes inlet and liquid outlet, and the inlet of each cooling pond 570 communicates with inlet socket 531, for example the inlet of cooling pond 570 communicates with inlet socket 531 through pipeline L1. The outlet of each cooling reservoir 570 communicates with the inlet of the liquid cooling line 540. At least one cooling reservoir 570 is used to dissipate heat from each set of dc outlets 510.

In particular implementations, at least one cooling reservoir 570 may be used in thermally conductive contact with each set of dc outlets 510. Further, the cooling medium of the off-board cooling system 420 may first flow into the at least one cooling reservoir 570 through the inlet receptacle 531. The cooling medium exchanges heat with each set of dc sockets 510 during the flowing process of the at least one cooling tank 570, so as to take away heat generated by each set of dc sockets 510, and realize liquid cooling heat dissipation of each set of dc sockets 510. After the heat exchange is completed, the cooling medium flows from the at least one cooling tank 570 into the liquid cooling pipeline 540, for example, into the first liquid inlet pipeline 541, so as to continuously perform liquid cooling heat dissipation on the power cables 550 connected to each group of the dc sockets 510.

It is understood that when the power battery 520 of the electric vehicle 500 is charged with high power, each set of dc outlets 510 also generates heat during the process of transferring the dc power output from the charging device 400 to the power battery 520 through the power cable 550. In the embodiment of the present application, at least one cooling tank 570 is communicated between the liquid inlet socket 531 and the input end of the liquid cooling pipeline 540, and the at least one cooling tank 570 can perform liquid cooling and heat dissipation on each group of dc sockets 510 by using the cooling medium provided by the external cooling system 420, so that the heat dissipation requirement of the electric vehicle 500 during high-power charging can be better met, the charging safety of the electric vehicle 500 is improved, and the normal running of the high-power charging of the electric vehicle 500 is ensured.

The specific structure of at least one cooling reservoir 570 in the electric vehicle 500 in thermal contact with each set of dc outlets 510 in the electric vehicle 500 is described exemplarily below.

In one example, as shown in fig. 13, an electric vehicle 500 is exemplified as including a set of DC outlets 510a and a cooling pool 570, the DC outlets 510a including positive DC outlets dc+ and negative DC outlets DC-arranged at intervals. The cooling bath 570 is located between the positive DC outlet dc+ and the negative DC outlet DC-in the arrangement direction of the positive DC outlet dc+ and the negative DC outlet DC-. And, the cooling bath 570 includes two outer surfaces S1 and S2 disposed opposite to each other in an arrangement direction of the positive DC outlet dc+ and the negative DC outlet DC-, one outer surface S1 facing the positive DC outlet dc+ and the other outer surface S2 facing the negative DC outlet DC-.

One of the outer surfaces S1 is for thermally conductive contact with a positive DC outlet dc+ and the other outer surface S2 is for thermally conductive contact with a negative DC outlet DC-. In this way, heat generated by the positive DC outlet dc+ can be transferred to the cooling medium in the cooling bath 570 through one outer surface S1 of the cooling bath 570, and heat generated by the negative DC outlet dc+ can be transferred to the cooling medium in the cooling bath 570 through the other outer surface S2 of the cooling bath 570.

Further, when the electric vehicle 500 includes two sets of dc outlets 510, the electric vehicle 500 may include two cooling pools 570. Wherein two cooling cells 570 are in one-to-one correspondence with two sets of DC outlets 510, each cooling cell 570 being located between and in heat conductive contact with a positive DC outlet dc+ and a negative DC outlet DC-of a corresponding set of DC outlets 510. For a detailed description, reference may be made to the description of the electric vehicle 500 including the set of dc outlets 510a and the cooling pool 570, which is not repeated herein.

In another example, referring to fig. 14, fig. 14 is a schematic diagram illustrating a structure in which at least one cooling tank 570 is in thermal contact with each set of dc outlets 510 in an electric vehicle 500 according to another embodiment of the present application.

As shown in fig. 14, taking an example in which the electric vehicle 500 includes two sets of DC outlets 510 (i.e., DC outlet 510a and DC outlet 510 b) and one cooling pool 570, the DC outlet 510a includes a positive DC outlet dc+ and a negative DC outlet DC-, and the DC outlet 510b includes a positive DC outlet DC1+ and a negative DC outlet DC1-. Wherein, the inlet of the cooling tank 570 is communicated with the inlet socket 531 via a pipeline L1, the outlet of the cooling tank 570 is communicated with the input end of the liquid cooling pipeline 540, and is communicated with the outlet socket 532 via the output end of the liquid cooling pipeline 540.

The DC sockets 510a and 510b are arranged in a first direction, positive DC sockets dc+ and negative DC sockets DC-in the DC sockets 510a are arranged in a second direction, and positive DC sockets DC1+ and negative DC sockets DC 1-in the DC sockets 510b are arranged in the second direction, the second direction being perpendicular to the first direction. The cooling pond 570 is located between the dc outlets 510a and 510b along the first direction, and the cooling pond 570 includes two opposite outer surfaces S1 and S2 along the first direction, one outer surface S1 facing one set of the dc outlets 510a and the other outer surface S2 facing the other set of the dc outlets 510b.

One of the outer surfaces S1 is for thermally contacting the positive DC outlet dc+ and the negative DC outlet DC-of one set of DC outlets 510a, and the other outer surface S2 is for thermally contacting the positive DC outlet DC1+ and the negative DC outlet DC 1-of the other set of DC outlets 510 b. Thus, heat generated by the positive DC outlet dc+ and the negative DC outlet DC-of one set of DC outlets 510a can be transferred to the cooling medium in the cooling tank 570 through one outer surface S1 of the cooling tank 570, and heat generated by the positive DC outlet DC1+ and the negative DC outlet DC 1-of the other set of DC outlets 510b can be transferred to the cooling medium in the cooling tank 570 through the other outer surface S2 of the cooling tank 570.

Fig. 15 is a schematic structural diagram of another electric vehicle 500 according to 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 fig. 11 to 14, and the following description mainly describes the differences between the two to avoid redundancy.

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

In particular implementations, with reference to fig. 5 and 15, the cooling medium of the off-board cooling system 420 may flow into the thermal management system 570 through the inlet socket 521 and the second inlet line 581. The cooling medium exchanges heat with the power battery 520 during the flowing process of the thermal management system 570 to take away the heat generated by the power battery 520, so as to realize liquid cooling and heat dissipation of the power battery 520. Then, the cooling medium flows out of the electric vehicle 500 through the second liquid outlet pipe 582 and the liquid outlet socket 532, and then flows back to the off-vehicle cooling system 420 again, so as to take the heat generated by the power battery 520 out of the electric vehicle 500 and realize 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 communicate 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 perform liquid cooling heat dissipation on the power cable 550 connected to each set of dc sockets 510 by using the cooling medium provided by the off-board cooling system 420, and can perform liquid cooling heat dissipation on the power battery 520 by using the cooling medium provided by the off-board cooling system 420. This can simultaneously satisfy the heat dissipation requirements of the power battery 520 and the power cable 550 when the electric vehicle 500 is charged with high power, which is beneficial to ensure the normal operation of the electric vehicle 500 for high power charging.

In some embodiments, with continued reference to fig. 15, the electric vehicle 500 further includes two three-way valves 590a and 590b. Three ports of one three-way valve 590a are respectively communicated with the input ends of the liquid inlet socket 531 and the liquid cooling pipeline 540 and the input end of the second liquid inlet pipeline 581, and three ports of the other three-way valve 590b are respectively communicated with the output ends of the liquid outlet socket 532 and the liquid cooling pipeline 540 and the output end of the second liquid outlet pipeline 582.

Thus, after the cooling medium provided by the external cooling system 420 flows into the electric vehicle 500 through the liquid inlet socket 531, the cooling medium can be split into two paths through one three-way valve 590a, one path flows into the liquid cooling pipeline 540 for dissipating heat of the power cables 550 connected to each set of the direct current sockets 510, and the other path flows into the thermal management system 570 for dissipating heat of the power battery 520. Then, 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 the other three-way valve 590b, and further flow back to the external cooling system 420 through the liquid outlet socket 532 again, so as to realize circulation of the cooling medium of the external cooling system 420 in the electric vehicle 500.

The specific structures of the charging pile 400 and the electric vehicle 500 in the charging system 300 according to the embodiment of the present application are described above with reference to the drawings. It can be appreciated that, in practical application, the charging pile 400 and the electric vehicle 500 can identify the connection state of the liquid cooling plug and the liquid cooling socket according to the connection confirmation circuit respectively provided, so that the charging device 410 can perform high-power charging on the electric vehicle 500 under the condition that the liquid cooling plug and the liquid cooling socket are successfully connected, and the off-vehicle cooling system 420 can provide cooling medium for the electric vehicle 500 to realize heat dissipation on the power cable 550.

A specific manner in which the connection state between the liquid cooling plug 441 and the liquid cooling socket 530 is recognized by the charging pile 400 and the electric vehicle 500 according to the connection confirmation circuit provided in each of the electric vehicle 500 will be described below, taking the connection between the liquid cooling socket 530 and the liquid cooling plug 441 of the liquid cooling gun 440 as an example.

Fig. 16 is a schematic diagram of a heat dissipation system according to 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 disposed on the liquid cooling gun 440 shown in fig. 3, 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, 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, referring to fig. 3 and 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, the liquid cooling connection confirmation plug being disposed in the liquid cooling interface shown in fig. 16. The electric vehicle 500 further includes a liquid-cooling connection confirmation socket provided in the vehicle interface M2 shown in fig. 16, and a liquid-cooling connection confirmation circuit connected to the liquid-cooling connection confirmation socket. Wherein the liquid cooling connection confirmation socket is used for connecting with a liquid cooling connection confirmation plug of the liquid cooling gun 440.

In the specific implementation, as shown in fig. 16, 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 in which the liquid cooling connection confirmation socket and the liquid cooling connection confirmation plug are connected.

The electric vehicle 500 is configured to determine a connection state between the liquid-cooled socket and the liquid-cooled plug based on a voltage at least one detection point in the liquid-cooled connection confirmation circuit of the electric vehicle 500. The electric vehicle 500 is configured to confirm that the liquid cooling socket and the liquid cooling plug are successfully connected, i.e., that the liquid inlet socket and the liquid outlet plug, and that the liquid outlet socket and the liquid inlet plug are successfully connected, when the voltage of each detection point in the at least one detection point reaches a preset vehicle end value.

Accordingly, 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 plug and the liquid cooling connection confirmation circuit connected to the liquid cooling connection confirmation socket.

The charging pile 400 is used for judging the connection state 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 configured to confirm that the liquid cooling plug and the liquid cooling socket are successfully connected when the voltage at the detection point reaches the preset value of the pile tip, i.e. to confirm 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 determine 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 each liquid cooling connection confirmation circuit. Further, in the case that the connection between the liquid cooling plug and the liquid cooling socket is successful, 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 may transmit the cooling medium to the liquid cooling pipeline 540 of the electric vehicle 500, so as to implement heat dissipation of the power cable 550 by the liquid cooling pipeline 540. This is advantageous in satisfying the heat dissipation requirement of the power cable 550 when the electric vehicle 500 is charged with high power, thereby improving the charging safety of the electric vehicle 500 and ensuring the normal operation of the charging device 410 for charging the electric vehicle 500 with high power.

Next, a specific circuit form of the liquid-cooling connection confirmation circuit in the electric vehicle 500 and a strategy for judging the connection state of the liquid-cooling socket and the liquid-cooling plug in the electric vehicle 500 will be described with reference to the drawings.

It should be understood that an execution subject of the electric vehicle 500 described below to determine the connection state of the liquid-cooled outlet and the liquid-cooled plug may be, for example, a vehicle controller in the electric vehicle 500.

Fig. 17 is a schematic structural diagram of a heat dissipation system according to an embodiment of the present application.

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

The liquid-cooled connection confirmation circuit in the electric vehicle 500 includes a detection point between the first resistor unit and the first liquid-cooled connection confirmation socket, that is, the detection point may be the detection point 2 between the resistor R5 and the first liquid-cooled connection confirmation socket 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 2 is connected to the voltage source U2, the voltage at the detection point 2 should be the voltage output from 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 confirmation plug, the voltage source U2 is looped through the resistor R5, the resistor R3 in the liquid cooling connection confirmation circuit of the liquid cooling gun 440, and the ground line. In this loop, the voltage at the detection point 2 reaches the corresponding preset value at the vehicle end due to the voltage division of the resistor.

For example, if the voltage output by the voltage source U2 is set to be 12V and the resistances of the resistor R3 and the resistor R5 are equal, the preset value of the vehicle end corresponding to the detection point 2 is set to be 6V. With this design, if the voltage at the detection point 2 reaches 6V, the electric vehicle 500 recognizes that the liquid-cooled socket and the liquid-cooled plug are successfully connected.

For another example, the voltage output by the voltage source U2 is still set to be 12V, but the resistances of the resistor R3 and the resistor R5 are different, if the resistor R3 is 2Ω and the resistor R5 is 4Ω, the preset value of the vehicle end corresponding to the detection point 2 is 4V. With this design, if the voltage at the detection point 2 reaches 4V, the electric vehicle 500 recognizes that the liquid-cooled socket and the liquid-cooled plug are successfully connected.

Therefore, based on the above analysis, in the case where the voltage at the detection point 2 is the voltage output from the voltage source U2, the electric vehicle 500 can recognize that the liquid-cooled outlet is not connected to the liquid-cooled plug. When the voltage at the detection point 2 reaches the corresponding preset vehicle end value, the electric vehicle 500 can identify that the liquid cooling socket and the liquid cooling plug are successfully connected.

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, 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 is the voltage output from the voltage source. In the case that the voltage at the detection point reaches the preset value at the vehicle end, the electric vehicle 500 recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected. The accuracy of identifying the connection state of the liquid cooling plug and the liquid cooling socket of the electric vehicle 500 can be improved by identifying the connection state of the liquid cooling plug and the liquid cooling socket according to the voltage at the detection point.

Fig. 18 is a schematic structural diagram of another heat dissipation system according to an embodiment of the present application.

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

The liquid-cooled connection confirmation circuit in the electric vehicle 500 includes two detection points, one detection point is located between the first resistor unit and the first liquid-cooled connection confirmation socket, and the other detection point is located between the second resistor unit and the second liquid-cooled connection confirmation socket. That is, one detection point may be the detection point 2 between the resistor R5 and the first liquid-cooled connection confirmation socket shown in fig. 18, and the other detection point may be the detection point 3 between the resistor R4 and the second liquid-cooled connection confirmation socket 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 since the detection point 3 is connected to the vehicle body floor. 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 line. In this loop, the voltage at the detection point 3 reaches the corresponding preset value at the vehicle end due to the voltage division of the resistor.

For example, the voltage output by the voltage source U1 is set to be 12V, and the resistances of the resistor R1 and the resistor R4 are equal, so that the preset value of the vehicle end corresponding to the detection point 3 is set to be 6V. With this design, if the voltage at the detection point 3 reaches 6V, the electric vehicle 500 recognizes that the liquid-cooled socket and the liquid-cooled plug are successfully connected.

For another example, the voltage output by the voltage source U1 is still set to be 12V, but the resistances of the resistor R1 and the resistor R4 are different, if R1 is 2Ω and R4 is 4Ω, the preset value of the vehicle end corresponding to the detection point 3 is 8V. With this design, if the voltage at the detection point 3 reaches 8V, the electric vehicle 500 recognizes that the liquid-cooled socket and the liquid-cooled plug are successfully connected.

The related description of the detection point 2 can be referred to the embodiment shown in fig. 17, and will not be repeated here.

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

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

Fig. 19 is a schematic structural diagram of yet another heat dissipation system according to an embodiment of the present application.

Unlike 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-cooled 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-cooled connection confirmation socket, and the other detection point is located between the second resistance unit and the second liquid-cooled connection confirmation socket. That is, one detection point may be the detection point 2 between the switch Sv and the first liquid-cooled connection confirmation socket shown in fig. 19, and the other detection point may be the detection point 3 between the resistor R4 and the second liquid-cooled connection confirmation socket shown in fig. 19. The specific identification process is similar to that of fig. 18, and is not repeated here.

It can be appreciated that in some embodiments, the electric vehicle 500 may determine the connection state of the liquid cooling socket and the liquid cooling plug according to the voltage of the detection point 3, and the specific determination process is described in the above embodiments, which is not repeated herein.

The above description of the embodiments of the electric vehicle 500 for determining the connection state between the liquid cooling plug and the liquid cooling socket has been given in terms of the electric vehicle 500, and the following description will be given of the specific circuit form of the liquid cooling connection confirmation circuit in the liquid cooling gun 440 and the strategy for the charging pile 400 to determine the connection state between the liquid cooling plug and the liquid cooling plug from the viewpoint of the charging pile 400.

It should be understood that an execution body of the charging pile 400 described below for determining the connection state 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 particular implementations, the liquid-cooled controller may be provided separately in the off-board cooling system 420 or may be integrated with the charge controller in the charging device 410.

With continued reference to fig. 17, in some embodiments, the liquid-cooled connection confirmation plug includes a first liquid-cooled connection confirmation plug (i.e., the CC2 plug in the liquid-cooled interface shown in fig. 17) and a second liquid-cooled connection confirmation plug (i.e., the CC1 plug in the liquid-cooled interface shown in fig. 17). The liquid-cooled connection confirmation circuit in the liquid-cooled gun 440 includes a third resistance unit including, for example, a resistor R1. The second liquid cooling connection confirmation plug is connected with the voltage source U1 through the third resistance unit. 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 may 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 at the detection point 1 should be the voltage output from 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 is looped through the resistor R1, the resistor R4 in the electric vehicle 500, and the ground line. In this loop, the voltage at the detection point 1 reaches the corresponding tip preset value due to the resistor voltage division.

For example, the voltage output by the voltage source U1 is set to be 12V, and the resistances of the resistor R1 and the resistor R4 are equal, and then the pile end preset value corresponding to the detection point 1 is set to be 6V. Under this design, if the voltage at 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 be 12V, but the resistances of the resistor R1 and the resistor R4 are different, if the resistor R1 is 2Ω and the resistor R4 is 4Ω, the preset value of the pile end 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 the detection point 1 is the voltage output by the voltage source U1, the charging pile 400 can identify that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage of the detection point 1 reaches the preset value of the corresponding pile end, the charging pile 400 can identify that the liquid cooling socket and the liquid cooling plug are successfully connected.

The specific process of identifying the connection state of the liquid cooling socket and the liquid cooling plug by the charging pile 400 in the liquid cooling connection confirmation circuit in the liquid cooling gun 440 shown in fig. 18 is similar to that shown in fig. 17, and will not be described again here.

Referring to fig. 19, in some embodiments, the third resistance unit of the liquid cooling connection verification circuit in the liquid cooling gun 440 includes R1, a resistor R1', a switch S1, and a 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 resistance unit and the second liquid-cooling connection confirmation plug, that is, the detection point may be the detection point 1 shown in fig. 19. The specific process of the charging post 400 for identifying the connection state of the liquid-cooled socket and the liquid-cooled plug may be referred to in the related description of the embodiment shown in fig. 17, and will not be repeated herein.

The above description has been made on the connection states of the liquid cooling plug and the liquid cooling plug respectively for the electric vehicle 500 and the charging pile 400, and in practical application, the connection states of the dc plug and the dc socket may be determined in addition to the connection states of the liquid cooling plug and the liquid cooling plug for the electric vehicle 500 and the charging pile 400.

For the determination of the connection state of the dc outlet and the dc plug, reference may be made to the relevant standard content. Hereinafter, the connection state of the direct current plug and the direct current socket will be determined by the electric vehicle 500 and the charging pile 400 as described briefly with reference to the accompanying drawings.

Fig. 20 is a schematic structural diagram of a charging system 300 according to an embodiment of the present application. The charging interface shown in fig. 20 is an interface provided on the charging gun 430 shown in fig. 3, and 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 fig. 20 is one vehicle interface M1 shown in fig. 3, and the vehicle interface M1 includes a positive DC outlet dc+ and a negative DC outlet DC-of a set of DC outlets 510.

In some embodiments, in conjunction with fig. 3 and 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, the charging connection confirmation plug being disposed in the charging interface shown in fig. 20. The electric vehicle 500 further includes a charge connection confirmation socket provided in the vehicle interface M1 shown in fig. 20, and a charge connection confirmation circuit connected to the charge connection confirmation socket. Wherein the charging connection confirmation socket is used for connecting with a charging connection confirmation plug of the charging gun 430.

The electric vehicle 500 is used for judging the connection state of the dc socket and the dc plug according to the voltage at the detection point in the charging connection confirmation circuit of the electric vehicle 500, and the charging pile is used for judging the connection state of the dc socket and the dc plug according to the voltage at 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 of the dc plug and the dc socket by detecting the voltage of the point 2. The charging pile 400 can determine the connection state of the dc plug and the dc socket by the voltage at the detection point 1.

In the case where 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 in the case where the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, in the case where 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 ground line, the voltage source U1 forms a loop through the resistor R1, the resistor R4, and the ground line in the electric vehicle 500, and since the resistor divides the voltage at the detection point 2 is a preset value between 0 and U2, the voltage at the detection point 1 is a preset value between 0 and U1.

For example, the voltage output by the voltage source U1 and the voltage source U2 are set to be 12V, the resistance values of the resistor R1 and the resistor R4 are equal, and the resistance values of the resistor R3 and the resistor R5 are equal. 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 values shown in the above embodiments are merely exemplary, and reference may be made to the relevant standards for specific voltage sources and resistance values.

Based on this, the above description has been given of a specific manner in which the electric vehicle 500 and the charging pile 400 determine the connection state of the dc outlet and the dc plug and the connection state of the liquid-cooled outlet and the liquid-cooled plug based on the connection confirmation circuits provided respectively. 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 will be described below.

Fig. 21 is a schematic diagram illustrating an interface between a liquid cooling interface of a liquid cooling gun 440 and a vehicle interface M2 of an electric vehicle 500 according to an embodiment of the present application.

The I and O sockets 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, 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 ground socket mentioned above. Correspondingly, the I plug and the 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 fig. 3, 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 that is sleeved around the liquid cooling receptacle (i.e., the liquid inlet receptacle and the liquid outlet receptacle) and the liquid cooling connection confirmation receptacle to form the vehicle interface M2. Correspondingly, the liquid cooling gun 440 further comprises a liquid cooling interface housing, and the liquid cooling interface housing 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, a distance d2' between an end face of the first liquid-cooled connection confirmation receptacle (CC 2 receptacle) and an end face of the interface housing is greater than a distance between an end face of the liquid-cooled receptacle and an end face of the interface housing. The distance d2 between the end face of the first liquid-cooling connection confirmation plug (CC 2 plug) and the end face of the liquid-cooling interface housing is greater than the distance between the end face of the liquid-cooling plug and the end face of the liquid-cooling interface housing.

The end face of the interface housing is an end face of the interface housing facing the vehicle body outside of the electric vehicle 500, the end face of the first liquid cooling connection confirmation socket (CC 2 socket) is an end face of the first liquid cooling connection confirmation socket (CC 2 socket) facing the vehicle body outside of the electric vehicle 500, and the end face of the liquid cooling socket is an end face of the liquid cooling socket facing the vehicle body outside of the electric vehicle. Correspondingly, the end face of the liquid cooling interface housing is the end face of the liquid cooling interface housing facing the outside of the liquid cooling gun 440, the end face of the first liquid cooling connection confirmation plug (CC 2 plug) is the end face of the first liquid cooling connection confirmation plug (CC 2 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 housing and the distance between the end face of the liquid outlet socket (O socket) and the end face of the interface housing are equal and d0', the distance between the end face of the liquid outlet socket and the end face of the interface housing can be understood as d0'. Accordingly, since the distance between the end face of the liquid inlet plug (O plug) and the end face of the liquid cooling interface housing and the distance between the end face of the liquid outlet plug (I plug) and the end face of the liquid cooling interface housing are equal and d0, the distance between the end face of the liquid cooling plug and the end face of the liquid cooling interface housing can be understood as d0. That is, in the above embodiment, d2 '> d0', d2 > d0.

In connection with the electric vehicle 500 shown in fig. 17, the connection states of the liquid cooling socket and the liquid cooling plug are identified according to the first liquid cooling connection confirmation socket (CC 2 socket) and the first liquid cooling connection confirmation plug (CC 2 plug), based on the above design, in the process that the liquid cooling interface of the liquid cooling gun 440 is connected to the vehicle interface M2 of the electric vehicle 500, the liquid cooling socket in the liquid cooling interface is connected to the liquid cooling plug in the vehicle interface M2 first, that is, the liquid inlet plug (O plug) is connected to the liquid outlet socket (O socket), the liquid outlet plug (I plug) is connected to the liquid inlet socket (I socket) first, and then the first liquid cooling connection confirmation socket (CC 2 plug) in the liquid cooling interface is connected to the first liquid cooling connection confirmation plug (CC 2 plug) in the vehicle interface M2. This is advantageous in achieving heat dissipation from the off-vehicle cooling system 420 in the charging stake 400 to the power cable 550 of the electric vehicle 500 when the charging device 410 in the charging stake 400 charges the electric vehicle 500 with high power.

This is because if the first liquid-cooling connection confirmation socket (CC 2 socket) is connected to the first liquid-cooling connection confirmation plug (CC 2 plug) first, the liquid-cooling socket is connected to the liquid-cooling plug first, and the first liquid-cooling connection confirmation socket (CC 2 socket) and the first liquid-cooling connection confirmation plug (CC 2 plug) may be turned on, but the liquid-cooling socket is not turned on with the liquid-cooling plug. This results in the possibility that the connection state of the liquid-cooled socket and the liquid-cooled plug, which is confirmed by the first liquid-cooled connection confirmation circuit of the electric vehicle 500 connected through the first liquid-cooled connection confirmation socket, may be wrong, thereby causing a problem of leakage of liquid between the liquid-cooled socket and the liquid-cooled plug. Therefore, in the embodiment of the present application, by designing the liquid cooling socket to be connected with the liquid cooling plug first, the first liquid cooling connection confirmation socket is connected with the first liquid cooling connection confirmation plug later, which is beneficial to avoiding the above-mentioned problem of liquid leakage caused by misjudging the connection state of the liquid cooling socket and the liquid cooling plug by the electric vehicle 500.

Further, in some embodiments, a distance d1 'between an end face of the second liquid-cooled connection confirmation receptacle (CC 1 receptacle) and an end face of the interface housing is greater than a distance d0' between an end face of the liquid-cooled receptacle and an end face of the interface housing. The distance d1 between the end face of the second liquid-cooling connection confirmation plug (CC 1 plug) and the end face of the liquid-cooling interface housing is greater than the distance d0 between the end face of the liquid-cooling plug and the end face of the liquid-cooling interface housing. 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 outside of the vehicle body of the electric vehicle 500, and the end face of the second liquid-cooling connection confirmation plug is the end face of the second liquid-cooling connection confirmation plug facing the outside of the liquid-cooling gun 440.

In connection with the electric vehicle 500 shown in fig. 18, the connection states of the liquid cooling socket and the liquid cooling plug are identified according to the first liquid cooling connection confirmation socket (CC 2 socket) and the first liquid cooling connection confirmation plug (CC 2 plug), and the second liquid cooling connection confirmation socket (CC 1 socket) and the second liquid cooling connection confirmation plug (CC 1 plug), and 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 (CC 2 socket) and the first liquid cooling connection confirmation plug (CC 2 plug), and the second connection confirmation socket (CC 2 socket) and the second connection confirmation plug (CC 2 plug) are connected later, which is also beneficial to avoid the problem of liquid leakage caused by misjudging the connection states of the liquid cooling socket and the liquid cooling plug by the electric vehicle 500. For specific description, reference may be made to the description of the connection between the liquid-cooled socket and the liquid-cooled plug after the connection between the first liquid-cooled connection confirmation socket and the first liquid-cooled connection confirmation plug, which is not repeated herein.

With continued reference to fig. 21, in one embodiment, a distance d2 'between an end face of the first liquid-cooled connection confirmation receptacle (CC 2 receptacle) and an end face of the interface housing is greater than a distance d1' between an end face of the second liquid-cooled connection confirmation receptacle (CC 1 receptacle) and an end face of the interface housing. The distance d2 between the end face of the first liquid-cooling connection confirmation plug (CC 2 plug) and the end face of the liquid-cooling interface housing is greater than the distance d1 between the end face of the second liquid-cooling connection confirmation plug (CC 1 plug) and the end face of the liquid-cooling interface housing, namely d2 '> d1', d2 > d1.

In connection with the electric vehicle 500 shown in fig. 17, the connection state between the liquid cooling socket and the liquid cooling plug is identified based on the first liquid cooling connection confirmation socket (CC 2 socket) and the first liquid cooling connection confirmation plug (CC 2 plug), and the connection state between the liquid cooling socket and the liquid cooling plug is identified based on the second liquid cooling connection confirmation socket (CC 1 socket) and the second liquid cooling connection confirmation plug (CC 1 plug), based on the above-described design, during the connection of the liquid cooling interface to the vehicle interface M2, the second liquid cooling connection confirmation socket is connected to the second liquid cooling connection confirmation plug first, and the first liquid cooling connection confirmation socket is connected to the first liquid cooling connection confirmation plug later, which corresponds to the final complete connection confirmation between the liquid cooling socket and the liquid cooling plug by the electric vehicle 500, thereby contributing to an improvement in connection state confirmation efficiency.

This is because, after the final complete connection confirmation of the liquid-cooled outlet and the liquid-cooled plug is completed, the electric vehicle 500 needs to send a message requesting the charging power to the charging pile 400, and the magnitude of the charging power is determined by the electric vehicle 500. When the liquid cooling plug is connected to the liquid cooling socket successfully, the electric vehicle 500 transmits a message requesting a larger charging power to the charging pile 400, and when the liquid cooling plug is not connected to the liquid cooling socket, the electric vehicle 500 transmits a message requesting a smaller charging power to the charging pile 400. If the last full connection confirmation is performed by the charging pile 400, the charging pile 400 needs to send a message to the electric vehicle 500 indicating that the charging pile 400 has completed the last full connection confirmation, and the electric vehicle 500 sends a message to the charging pile 400 to request charging power after receiving the message. In this case, the charging pile 500 needs to wait until the communication sockets (s+ socket and S-socket) in the vehicle interface M2 and the communication plugs (s+ plug and S-plug) in the liquid cooling interface are successfully connected to transmit the message, thereby increasing the message transmission 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 complete connection confirmation of the liquid cooling socket and the liquid cooling plug, the electric vehicle 500 may not wait to receive the message sent by the charging pile 400 and indicating that the charging pile 400 has completed the final complete connection confirmation, but directly send the message requesting for the charging power to the charging pile 400 after the final complete connection confirmation is completed, thereby being beneficial to improving the efficiency of the electrical connection state confirmation.

It will be appreciated that the above-described distance design of the respective sockets and plugs is merely illustrative and 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 receptacle (CC 2 receptacle) and the end face of the interface housing is equal to the distance d1' between the end face of the second liquid-cooled connection confirmation receptacle (CC 1 receptacle) and the end face of the interface housing. The distance d2 between the end face of the first liquid-cooled connection confirmation plug (CC 2 plug) and the end face of the liquid-cooled interface housing is greater than the distance d1 between the end face of the second liquid-cooled connection confirmation plug (CC 1 plug) and the end face of the liquid-cooled interface housing, i.e., d2 '=d1', d2 > d1. Based on the above design, in the process of connecting the liquid cooling interface and the vehicle interface M2, the second connection confirmation socket and the second connection confirmation plug can be connected first, and the connection after the first connection confirmation socket and the first connection confirmation plug corresponds to the final complete connection confirmation by the electric vehicle 500.

Or the distance d2 'between the end face of the first liquid-cooled connection confirmation socket (CC 2 socket) and the end face of the interface housing is larger than the distance d1' between the end face of the second liquid-cooled connection confirmation socket and the end face of the interface housing. The distance d2 between the end face of the first liquid-cooled connection confirmation plug and the end face of the liquid-cooled interface housing is equal to the distance d1 between the end face of the second liquid-cooled connection confirmation plug (CC 1 plug) and the end face of the liquid-cooled interface housing, i.e., d2 '> d1', d2=d1. Based on the above design, in the process of connecting the liquid cooling interface and the vehicle interface M2, the second connection confirmation socket and the second connection confirmation plug may be connected first, and the connection after the first connection confirmation socket and the first connection confirmation plug corresponds to the final complete connection confirmation by the electric vehicle 500.

The specific manner in which the charging pile 400 and the electric vehicle 500 recognize the connection state of the liquid cooling plug 441 and the liquid cooling plug 530 has been described above by taking the example in which the liquid cooling plug 530 of the electric vehicle 500 and the liquid cooling plug 441 of the liquid cooling gun 440 are connected as shown in fig. 3, and the specific manner in which the charging pile 400 and the electric vehicle 500 recognize the connection state of the liquid cooling plug 432 and the liquid cooling plug 530 according to the connection confirmation circuit provided in each of the charging pile 400 and the electric vehicle 500 is described below by taking the example in which the liquid cooling plug 530 of the electric vehicle 500 and the liquid cooling plug 432 of the charging gun 430 are connected as shown in fig. 5.

Fig. 22 is a schematic structural diagram of a charging system 300 according to an embodiment of the present application.

The charging interface shown in fig. 22 is an interface disposed on the charging gun 430 shown in fig. 5, a set of dc plugs in the charging interface is a set of dc plugs 431 shown in fig. 5, and the liquid inlet plug and the liquid outlet plug in the charging interface are a liquid inlet plug 4311 and a liquid outlet plug 4312 in the liquid cooling plug 431 shown in fig. 5. The vehicle interface M1 shown in fig. 22 is one vehicle interface M1 shown in fig. 5, the dc sockets in the vehicle interface M1 are the dc sockets 510 shown in fig. 5, and the liquid inlet and outlet sockets in the vehicle interface M1 are the liquid inlet and outlet sockets 531 and 532 in the liquid cooling socket 530 shown in fig. 5.

In some embodiments, in conjunction with fig. 5 and 22, the charging gun 430 further includes a connection confirmation plug, and a connection confirmation circuit connected to the connection confirmation plug, the connection confirmation plug being disposed in the charging interface shown in fig. 22. The electric vehicle 500 further includes a connection confirmation socket provided in the vehicle interface M1 shown in fig. 22, and a connection confirmation circuit connected to the connection confirmation socket. Wherein the connection confirmation socket is used for connecting with the connection confirmation plug of the charging gun 430.

In the 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 direct-current receptacle is connected to the direct-current plug, the liquid-cooled receptacle is connected to the liquid-cooled plug, and the connection confirmation receptacle 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 to which the connection confirmation receptacle and the connection confirmation plug are connected.

The electric vehicle 500 is configured to determine a connection state between the liquid-cooled socket and the liquid-cooled plug and a connection state between the dc socket and the dc plug based on a voltage at a detection point in a connection confirmation circuit of the electric vehicle 500. The electric vehicle 500 is configured to confirm that the liquid cooling socket and the liquid cooling plug are successfully connected and that the dc socket and the dc plug are successfully connected when the voltage at the detection point in the connection confirmation circuit of the electric vehicle 500 reaches a preset vehicle end value.

When the electric vehicle 500 confirms that the connection between the liquid cooling socket and the liquid cooling plug is successful and that the direct current socket and the direct current plug are successful, the electric vehicle 500 can send a message indicating that the connection between the liquid cooling socket and the liquid cooling plug is successful to the charging pile 400, and the charging pile 400 only needs to judge the connection state of the direct current socket and the direct current 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 state. The charging pile 400 is used for confirming 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 pile end value.

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 determine the connection state of the liquid cooling socket and the liquid cooling plug and the connection state of the dc socket and the dc plug according to the voltage at the detection point in the connection confirmation circuit of the electric vehicle 500. Further, in the case that the connection between the liquid cooling plug and the liquid cooling socket is successful, 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 may transmit the cooling medium to the liquid cooling pipeline 540 of the electric vehicle 500, so as to implement heat dissipation of the power cable 550 by the liquid cooling pipeline 540. This is advantageous in satisfying the heat dissipation requirement of the power cable 550 when the electric vehicle 500 is charged with high power, and improving the charging safety of the electric vehicle 500, thereby being advantageous in ensuring the normal operation of the charging device 410 for charging the electric vehicle 500 with high power.

Next, a specific circuit form of the connection confirmation circuit in the electric vehicle 500 and a strategy for determining the connection state of the dc outlet and the dc plug, the liquid-cooled outlet, and the liquid-cooled plug in the electric vehicle 500 will be described with reference to the accompanying drawings.

It should be understood that an execution subject of the electric vehicle 500 described below to determine the connection state of the dc outlet and the dc plug, the liquid-cooled outlet, and the liquid-cooled plug may be, for example, a vehicle controller in the electric vehicle 500.

Fig. 23 is a schematic structural diagram of a charging system 300 according to an embodiment of the present application.

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

That is, 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 configured to confirm a connection state between the dc outlet and the dc plug by the first connection confirmation circuit or the second connection confirmation circuit, and to confirm a connection state between the liquid-cooled outlet and the liquid-cooled plug by the third connection confirmation circuit.

In the embodiment of the application, the electric vehicle 500 respectively judges the connection states of the direct current socket and the direct current plug and the liquid cooling socket and the liquid cooling plug through different connection confirmation circuits, which is beneficial to improving the accuracy of judging the connection states of the direct current socket and the direct current plug and the liquid cooling socket and the liquid cooling plug of the electric vehicle 500.

The specific circuit form of the third connection confirmation circuit for judging the connection state of the liquid-cooled socket and the liquid-cooled plug will be described first with reference to the accompanying drawings.

With continued reference to fig. 23, in some embodiments, the third connection confirmation circuit includes a first resistance unit including, for example, a resistance R7. The third connection confirmation socket is connected to the voltage source U2 through the first resistance unit, and one 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 located between the resistor R7 and the third connection confirmation socket as shown in fig. 23.

In the case where 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 from the voltage source U2. Only in the case where the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, in the case where the third connection confirmation socket is connected to the third connection confirmation plug, the voltage source U2 forms a loop with the resistor R6 in the connection confirmation circuit of the charging gun 430 and the ground line through the resistor R7. In this loop, the voltage at the detection point 4 reaches the corresponding preset value at the vehicle end due to the voltage division of the resistor.

For example, if the voltage output by the voltage source U2 is set to be 12V and the resistances of the resistor R7 and the resistor R6 are equal, the preset value of the vehicle end corresponding to the detection point 4 is set to be 6V. With this design, if the voltage at the detection point 4 reaches 6V, the electric vehicle 500 recognizes that the liquid-cooled socket and the liquid-cooled plug are successfully connected.

For another example, the voltage output by the voltage source U2 is still set to be 12V, but the resistances of the resistor R7 and the resistor R6 are different, if the resistance R7 is 2Ω and the resistance R6 is 4Ω, the preset value of the vehicle end corresponding to the detection point 4 is 8V. With this design, if the voltage at the detection point 4 reaches 8V, the electric vehicle 500 recognizes that the liquid-cooled socket and the liquid-cooled plug are successfully connected.

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

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

Specific circuit forms of the first connection confirmation circuit and the second connection confirmation circuit for judging the connection state of the dc outlet and the dc plug are described below with reference to the drawings.

With continued reference to fig. 23, in some embodiments, the first connection confirmation circuit includes a third resistor unit, for example, the third circuit unit includes a resistor R5. The first connection confirmation socket is connected to the voltage source U2 through the third resistance unit. Another detection point in the connection confirmation circuit of the electric vehicle 500 is located between the third resistance unit and the first connection confirmation socket, that is, the detection point may be the detection point 2 located between the resistance R5 and the first connection confirmation socket shown in fig. 23.

In the case where 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 from the voltage source U2. Only in the case where the vehicle interface M1 of the electric vehicle 500 is connected to the charging interface of the charging gun 430, that is, in the case where the first connection confirmation socket and the first connection confirmation plug are connected, the voltage source U2 forms a loop with the resistor R3 in the connection confirmation circuit of the charging gun 430 and the ground line through the resistor R5. In this loop, the voltage at the detection point 2 reaches the corresponding preset value at the vehicle end due to the voltage division of the resistor.

For example, if the voltage output by the voltage source U2 is set to be 12V and the resistances of the resistor R3 and the resistor R5 are equal, the preset value of the vehicle end corresponding to the detection point 2 is set to be 6V. Under this design, if the voltage at the detection point 2 is 6V, the electric vehicle 500 recognizes that the dc outlet and the dc plug are successfully connected.

For another example, the voltage output by the voltage source U2 is still set to be 12V, but the resistances of R3 and R5 are different, if R3 is 2Ω and R5 is 4Ω, 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 outlet and the dc plug are successfully connected.

Based on the above analysis, in the case where the voltage at the detection point 2 is the voltage output by the voltage source U2, the electric vehicle 500 can recognize that the dc outlet is not connected to the dc plug. When the voltage at the detection point 2 reaches the corresponding preset value at the vehicle end, the electric vehicle 500 can identify that the dc socket and the dc plug are successfully connected.

Fig. 24 is a schematic structural diagram of another charging system 300 according to an embodiment of the present application.

Unlike the embodiment shown in fig. 23, in the embodiment shown in fig. 24, the third resistance unit includes a resistor R5 and a switch S3. At this time, a detection point 2 for determining the connection state of the dc outlet and the dc plug of the electric vehicle 500 is located between the switch S3 and the first connection confirmation outlet. The specific identification process is similar to that of fig. 23, and is not repeated here.

With continued reference to fig. 24, in some embodiments, the electric vehicle 500 further includes a ground receptacle (i.e., a PE receptacle in the vehicle interface M1 shown in fig. 24) that is coupled to the body ground platform and is configured to couple to a ground plug in the charging gun 430 (i.e., a PE plug in the charging interface shown in fig. 24). The second connection confirmation circuit includes a second resistance unit including, for example, resistors R4, R6 and a switch S2. The second connection confirmation socket is connected to the ground socket through the second resistance unit. Wherein a further 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, i.e., the detection point may be the detection point 3 located between the resistance R4 and the second connection confirmation socket shown in fig. 24.

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 since the detection point 3 is connected to the vehicle body ground platform. Only in the case where the vehicle interface M1 of the electric vehicle 500 is connected with the charging interface of the charging gun 430, that is, in the case where 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 line. In this loop, the voltage at the detection point 3 reaches the corresponding preset value at the vehicle end due to the voltage division of the resistor.

For example, the voltage output by the voltage source U1 is set to be 12V, and the resistances of the resistor R1 and the resistor R4 are equal, so that the preset value of the vehicle end corresponding to the detection point 3 is set to be 6V. Under this design, if the voltage at the detection point 3 reaches 6V, the electric vehicle 500 recognizes that the dc outlet and the dc plug are successfully connected.

For another example, the voltage output by the voltage source U1 is still set to be 12V, but the resistances of the resistor R1 and the resistor R4 are different, if R1 is 2Ω and R4 is 4Ω, the preset value of the vehicle end 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 outlet and the dc plug are successfully connected.

In the case where the dc socket is connected to the dc plug, the voltage at the detection point 2 and the voltage at the detection point 3 are respectively corresponding preset values at the vehicle end, so, in combination with the analysis of the detection point 2 and the detection point 3, in the case where the voltage at the detection point 3 is 0V and the voltage at the detection point 2 is the voltage output by the voltage source U2, the electric vehicle 500 can recognize that the dc socket is not connected to the dc plug. When the voltage at the detection point 2 reaches the corresponding preset value at the vehicle end and the voltage at the detection point 3 reaches the corresponding preset value at the vehicle end, the electric vehicle 500 can identify that the dc socket is connected with the dc plug.

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

In the above, the embodiments of the electric vehicle 500 in which the connection state of the liquid-cooled socket and the liquid-cooled plug and the connection state of the dc socket and the dc plug are determined are described from the viewpoint of the electric vehicle 500. In a 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 may only need to determine the connection state of the dc socket and the dc plug. Next, from the point of view of the charging post 400, a specific circuit form of the connection confirmation circuit in the charging gun 430 and a strategy of the charging post 400 to determine the connection state of the dc outlet and the dc plug will be described.

With continued reference to fig. 23, in some embodiments, the connection confirmation plugs include a first connection confirmation plug (i.e., the CC2 plug in the charging interface shown in fig. 23), a second connection confirmation plug (i.e., the CC1 plug in the charging interface shown in fig. 23), and a third connection confirmation plug (i.e., the CC3 plug in the charging interface shown in fig. 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, which are connected to the first connection confirmation circuit, the second connection confirmation circuit, and the third connection confirmation circuit, respectively.

That is, 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.

The first connection confirmation circuit includes a fourth resistor unit including, for example, a resistor R3. The first connection confirmation plug is connected to the equipment ground platform of the charging stake 400 through the fourth resistance unit. The second connection confirmation circuit includes a fifth resistance unit including, 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, i.e., the detection point may be the detection point 1 shown in fig. 23. The third connection confirmation circuit includes a sixth resistance unit including, for example, a resistance R6. The third connection confirmation plug is connected to the equipment ground platform through the sixth resistance unit.

It can be appreciated that in the embodiment of the present application, for the determination of the connection state of the dc plug and the dc socket, the charging pile 400 may be determined by using the method in the charging standard.

Specifically, in the case where 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 from 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 circuit through the resistor R1, the resistor R4 in the connection confirmation circuit of the electric vehicle 500, and the ground line. In this loop, the voltage at the detection point 1 reaches the corresponding tip preset value due to the resistor voltage division.

For example, the voltage output by the voltage source U1 is set to be 12V, and the resistances of the resistor R1 and the resistor R4 are equal, and then the pile end preset value corresponding to the detection point 1 is set to be 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 be 12V, but the resistances of the resistor R1 and the resistor R4 are different, if the resistor R1 is 2Ω and the resistor R4 is 4Ω, the preset value of the pile end 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 the detection point 1 is the voltage output by the voltage source U1, the charging pile 400 can recognize that the dc outlet is not connected to the dc plug. When the voltage of the detection point 1 reaches the preset value of the corresponding pile end, the charging pile 400 can identify that the direct current socket and the direct current plug are successfully connected.

Referring to fig. 24, in some embodiments, unlike the embodiment shown in fig. 23, in the embodiment shown in fig. 24, the fifth resistance unit includes resistors R1, R2 and a switch S1. The detection point 1 for identifying the connection state of the dc plug and the dc socket of the charging stake 400 is still located between the fifth resistance unit and the second connection confirmation plug. The specific process of the charging post 400 for identifying the connection state of the dc socket and the dc plug may be referred to in the related description of the embodiment shown in fig. 23, and will not be described herein.

Based on this, the above description is given of the specific manner in which the electric vehicle 500 and the charging pile 400 determine the connection state of the dc outlet and the dc plug, and the connection state of the liquid-cooled outlet and the liquid-cooled plug, based on the connection confirmation circuits provided respectively. 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 will be described below.

Fig. 25 is an interface schematic diagram of a charging interface of a charging gun 430 and a vehicle interface M1 of an electric vehicle 500 according to an embodiment of the present application.

The I and O sockets 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 fig. 5, 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 ground socket mentioned above. Correspondingly, the I plug and the 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 fig. 5, 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 that is sleeved around at least one set of dc sockets, liquid-cooled sockets (i.e., liquid inlet socket and liquid outlet socket), and connection confirmation sockets to form the vehicle interface M1. Correspondingly, the charging gun 430 further comprises a charging interface housing, and the charging interface housing is sleeved on the periphery of at least one group of direct current plug, liquid cooling plug (i.e. liquid inlet plug and liquid outlet plug) and connection confirmation plug to form a charging interface.

In some embodiments, a distance d3 'between an end face of the third connection confirmation receptacle (CC 3 receptacle) and an end face of the interface housing is greater than a distance d0' between an end face of the liquid cooled receptacle and an end face of the interface housing. The distance d3 between the end face of the third connection confirmation plug (CC 3 plug) and the end face of the charging interface housing is greater than the distance d3 between the end face of the liquid-cooled plug and the end face of the charging interface housing. I.e., d3 '> d0', d3 > d0.

The end face of the interface housing is an end face of the interface housing facing the vehicle body outside of the electric vehicle 500, the end face of the third connection confirmation socket (CC 3 socket) is an end face of the third connection confirmation socket (CC 3 socket) facing the vehicle body outside of the electric vehicle 500, and the end face of the liquid cooling socket is an end face of the liquid cooling socket facing the vehicle body outside of the electric vehicle. Correspondingly, the end face of the charging interface housing is the end face of the charging interface housing facing the outer side of the charging gun 430, the end face of the third connection confirmation plug (CC 3 plug) is the end face of the third connection confirmation plug (CC 3 plug) facing the outer side 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 outer side of the charging gun 430.

Based on the above design, in the process of the charging interface and the vehicle interface M1, the liquid cooling plug in the charging interface is connected with the liquid cooling plug in the vehicle interface M1 first, that is, the liquid inlet plug (O plug) is connected with the liquid outlet plug (O plug), the liquid outlet plug (I plug) is connected with the liquid inlet plug (I plug) first, and then the third connection confirmation socket (CC 3 plug) in the charging interface is connected with the third connection confirmation plug (CC 3 plug) in the vehicle interface M1 again. This facilitates the heat dissipation of the power cable 520 of the electric vehicle 500 by the off-vehicle cooling system 420 in the charging stake 400 when the charging device 410 in the charging stake 400 charges the electric vehicle 500 with high power.

This is because if the third connection confirmation socket (CC 3 socket) and the third connection confirmation plug (CC 3 plug) are connected first, the liquid cooling socket and the liquid cooling plug are connected later, and the third connection confirmation socket (CC 3 socket) and the third connection confirmation plug (CC 3 plug) may be turned on, but the liquid cooling socket is not turned on with the liquid cooling plug. This causes a possibility that the connection state of the liquid-cooled outlet and the liquid-cooled plug, which is confirmed by the third connection confirmation circuit of the electric vehicle 500 connected through the third connection confirmation outlet, may be wrong, thereby causing a problem of leakage of liquid between the liquid-cooled outlet and the liquid-cooled plug. Therefore, in the embodiment of the present application, the liquid cooling socket is connected with the liquid cooling plug first, and the third connection confirmation socket is connected with the third connection confirmation plug later, so that the problem of liquid leakage caused by misjudging the connection state of the liquid cooling socket and the liquid cooling plug by the electric vehicle 500 is advantageously avoided.

With continued reference to fig. 25, in some embodiments, a distance d3 'between an end face of the third connection confirmation receptacle (CC receptacle 3) and an end face of the interface housing is less than or equal to a distance d1' between an end face of the second connection confirmation receptacle (CC 1 receptacle) and an end face of the interface housing. The distance d3 between the end face of the third connection confirmation plug (CC 3 plug) and the end face of the charging interface housing is smaller than or equal to the distance d1 between the end face of the second connection confirmation plug (CC 1 plug) and the end face of the charging interface housing, namely d3 'is smaller than or equal to d1', d3 is smaller than or equal to d1. 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 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, in the process of connecting the charging interface with the vehicle interface M1, when d3 < d1, d3 '< d1', the third connection confirmation socket (CC 3 socket) is connected with the third connection confirmation plug (CC 3 plug) first, and the second connection confirmation socket (CC 1 socket) is connected with the second connection confirmation plug (CC 1 plug) later, which is equivalent to the final complete connection confirmation of the charging interface and the vehicle interface M1 by the charging stake 400. Or when d3=d1, d3 '=d1', the third connection confirmation socket is connected to the third connection confirmation plug and the second connection confirmation socket is connected to the second connection confirmation plug at the same time, which corresponds to the final complete connection confirmation of the charging interface and the vehicle interface M1 by the charging pile 400 and the electric vehicle 500 together.

It will be appreciated that, according to existing charging standard protocols, the charging gun is typically provided with only a dc plug, a first connection confirmation plug and a second connection confirmation plug, and no liquid cooling plug and no third connection confirmation plug, and that during connection of each plug of the charging gun with each socket of the electric vehicle, the second connection confirmation plug and the second connection confirmation socket are typically last connected, i.e. the last full connection confirmation is performed by the charging post.

In the embodiment of the present application, d3 'is less than or equal to d1', d3 is less than or equal to d1, so that the charging pile 400, or the charging pile 400 and the electric vehicle 500, simultaneously perform final complete connection confirmation, and the design still conforms to the final connection of the second connection confirmation plug and the second connection confirmation socket specified in the existing charging standard protocol, that is, conforms to the final complete connection confirmation performed by the charging pile 400 specified in the existing charging standard protocol, so that each plug of the charging interface and each socket of the vehicle interface M1 in the embodiment of the present application can continue to use the connection sequence of each plug and each socket specified in the existing charging standard. Therefore, the existing charging standard protocol is not changed, and the connection between the liquid cooling socket and the liquid cooling plug and the connection between the third connection confirmation socket and the third connection confirmation plug are added in the existing charging standard protocol, so that the implementation is simpler.

Further, in some embodiments, a distance d3 'between an end face of the third connection confirmation receptacle and an end face of the interface housing is equal to a distance d1' between an end face of the second connection confirmation receptacle and an end face of the interface housing, the distance d3 'between the end face of the third connection confirmation receptacle and the end face of the interface housing is greater than a distance d0' between an end face of the liquid-cooled receptacle and an end face of the interface housing, and the distance d0 'between the end face of the liquid-cooled receptacle and the end face of the interface housing is greater than or equal to a distance d2' between the end face of the first connection confirmation receptacle and the end face of the interface housing. The end face of the first connection confirmation receptacle is an end face of the first connection confirmation receptacle facing the vehicle body outside of the electric vehicle 500.

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

That is, in the above embodiment, d2.ltoreq.d0 < d1=d3, d2 '.ltoreq.d0' < d1 '=d3'. It will be appreciated that, based on the design of d2+.d0 < d1=d3, d2+.d0 ' < d1' =d3 ', during the connection of the charging interface with the vehicle interface M1, the first connection confirmation socket (CC 2 socket) is connected with the first connection confirmation plug (CC 2 plug), the liquid cooling socket is connected with the liquid cooling plug again, the second connection confirmation socket (CC 1 socket) is connected with the second connection confirmation plug (CC 1 plug), and the third connection confirmation socket (CC 3 socket) is connected with the third connection confirmation plug (CC 3 plug) last. Wherein, the connection of the first connection confirmation socket and the first connection confirmation plug may indicate that the charging gun is in a half-connection state with the vehicle interface, and the connection of the second connection confirmation socket and the second connection confirmation plug, and the connection of the third connection confirmation socket and the third connection confirmation plug may indicate that the charging gun is in a full-connection state with the vehicle interface M1.

Thus, in a specific implementation, the traction device may 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, detects that the charging gun 430 is in a semi-connected state with the vehicle interface, the electric vehicle 500 may control the traction device to pull the charging gun 430 so that the liquid cooling socket and the liquid cooling plug are connected first, and 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 after each other, that is, the charging gun is completely connected with the vehicle interface M1. In the process, the traction device is used for traction of the charging gun to move so that the charging gun and the vehicle interface M1 are in a complete connection state, and a user can not manually push the charging gun, so that the user experience is improved.

If d3 < d1 and d3 '< d1' are designed, it is described 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, there is a possibility that the third connection confirmation socket is connected to the third connection confirmation plug successfully but the second connection confirmation socket is not connected to the second connection confirmation plug at all times. Based on this situation, if the charging pile 400 misjudges that the charging gun 430 and the vehicle interface M1 are not in a completely connected state, the cooling medium is not transmitted to the electric vehicle 500 by the external cooling system 420 in the charging pile 400, so that the problem of heat dissipation of each group of dc sockets 510 in the electric vehicle 500 when the power battery 520 is charged cannot be solved, and the normal running of the high-power charging of the electric vehicle 500 is further affected.

Therefore, in the embodiment of the present application, by designing d1=d3, d1 '=d3', that is, the third connection confirmation socket is connected with the third connection confirmation plug and the second connection confirmation socket is connected with the second connection confirmation plug simultaneously, which is equivalent to the final complete connection confirmation performed by the electric vehicle 500 and the charging pile 400 together, it is advantageous to avoid misjudgment of the charging pile 400 and ensure that the off-vehicle cooling system 420 provides the cooling medium to the electric vehicle 500.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

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;

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.