CN219618930U - Charging pile expansion equipment and charging system - Google Patents

Abstract

The application provides a charging pile capacity expansion device and a charging system, wherein a plurality of power input interfaces, a power switching unit and a plurality of power output interfaces are arranged; the power switching unit includes: the power switch modules are connected in parallel; one end of each power input interface is respectively connected to one charging pile, and the other end of each power input interface is respectively connected with the input end of one power switch module in the power switching unit; one end of each power output interface is respectively connected with the output ends of one or more power switch modules in the power switching unit; the other end of each power output interface is used for being connected with the charging unit. According to the application, the power switching switch modules in the power switching unit are connected in parallel to control the charging power flow output by the charging pile, so that the capacity expansion equipment of the charging pile can meet sporadic user requirements for quick energy compensation and high-power charging requirements of the electric vehicle by expanding the laid charging pile, and the waste of charging electric energy is avoided.

Description

Charging pile expansion equipment and charging system

technical field

The present application relates to the technical field of charging pile expansion, in particular, to a charging pile expansion device and a charging system.

Background technique

With the improvement of people's awareness of environmental protection, the number of electric vehicles has gradually increased, and the demand for electric vehicle charging for private vehicles has also gradually expanded, leading to the problem of difficulty in charging private vehicles. The destination charging scene solution for private car charging needs plays a key role in solving the problem of private car charging difficulties.

At present, considering the characteristics of the destination charging scene, such as long parking time, low requirements on the extreme value of charging power, high requirements on the number of charging piles, and limited total power of the scene, the solution of the destination charging scene usually chooses a large number of AC Charging piles or low-power DC chargers to meet the charging needs of more parking spaces under the condition of limited total capacity. For a small number of users who occasionally need fast energy replenishment, it is currently possible to arrange high-power DC chargers in some parking spaces to meet users' rapid energy replenishment needs.

However, the use of some parking spaces to arrange high-power DC charging opportunities will reduce the number of charging piles, and will cause redundant waste of charging power during periods when there is no need for rapid energy replenishment.

Utility model content

The purpose of this application is to provide a charging pile capacity expansion device and a charging system to solve the problems in the prior art of reducing the number of charging pile layouts and redundant charging power waste.

In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

In the first aspect, an embodiment of the present application provides a charging pile expansion device, the device includes: a plurality of power input interfaces, a power switching unit, and a plurality of power output interfaces;

The power switching unit includes: a plurality of power switch modules connected in parallel;

One end of each of the power input interfaces is respectively connected to a charging pile, and the other end of each of the power input interfaces is respectively connected to an input end of a power switch module in the power switching unit;

One end of each of the power output interfaces is respectively connected to the output ends of one or more power switch modules in the power switching unit;

The other end of each power output interface is used to connect with the charging unit.

Optionally, the charging pile expansion device further includes: a power control unit;

The power control unit is connected to each charging pile, and is connected to each power switch module in the power switching unit;

The power control unit is used to collect the charging state and remaining capacity of each charging pile, and send a first control signal to the power switching unit and a second control signal to the charging pile to be used.

Optionally, the power switching unit further includes: a metering module;

The output end of each power switch module is connected to one end of each power output interface through the metering module, and is electrically connected to each charging pile;

Each of the power switch modules is configured to selectively control the charging power flow from each charging pile to be used according to the first control signal, and send the charging power flow to the metering module;

The metering module is used for metering the charging power flow and outputting the charging power flow to the plurality of power output interfaces.

Optionally, the metering module is further configured to monitor the voltage and current of the charging power flow, and output a monitoring signal to the power control unit.

Optionally, the power switch module includes any one of the following: a contactor, a relay, an insulated gate bipolar transistor or a thyristor.

Optionally, the charging pile expansion device further includes: a human-computer interaction unit;

The human-computer interaction unit is connected in communication with the power control unit, and the power control unit is connected in communication with the charging unit;

The power control unit is also used to receive the interactive control signal sent by the human-computer interaction unit, and receive the charging status of the vehicle sent by the charging unit and send it to the human-computer interaction unit. Optionally, the human-computer interaction unit includes: operation buttons;

The man-machine interaction unit is configured to send the interaction control signal to the power control unit according to the state of the operation button.

Optionally, the charging pile expansion device further includes: a power supply unit;

The power supply unit is electrically connected to each power switch module in the power switching unit, and is used to supply power to each power switch module.

In a second aspect, the present application provides a charging system, the charging system comprising: a plurality of charging piles, a charging unit, and a plurality of charging pile expansion devices according to the first aspect of the claim.

Optionally, each power switch module of the power switching unit in each charging pile expansion device is electrically connected to each charging pile through a power cable.

The beneficial effects of the application are: the application provides a charging pile expansion device, which includes a power control unit, a power switching unit, and a charging unit. The power control unit communicates with each charging pile and connects with the power switching unit. The unit is used to collect the charging status and remaining capacity of each charging pile, and send the first control signal to the power switching unit and the second control signal to the charging pile to be used. The power switching unit is electrically connected to each charging pile and connected to the charging pile. The units are electrically connected, and the power switching unit is used to select, control and measure the power flow output by the charging pile to be used, and output the charging power flow to the charging unit, and the charging unit is used to output the charging power flow to the charging vehicle. Through the power control unit to control the output of each charging pile and the selection control and measurement of the power switching unit, the charging power flow of multiple charging piles can be selected and combined and output, expanding the layout of charging piles, and providing fast energy for electric vehicles. Charging to meet the high-power charging needs of electric vehicles, avoiding the reduction in the number of charging piles caused by the use of high-power DC chargers in some parking spaces, and avoiding the redundant waste of charging power caused by the period when there is no demand for fast energy replenishment.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings that are required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of an application scenario of a charging pile expansion device provided in an embodiment of the present application;

Fig. 2 is a schematic diagram of a connection method between a charging pile expansion device and a charging pile provided in an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a charging pile expansion device provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a power control unit provided in an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a metering module provided by an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a human-computer interaction unit provided by an embodiment of the present application;

Fig. 7 is a schematic structural diagram of a power supply unit provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the appended The figures are only for the purpose of illustration and description, and are not used to limit the protection scope of the present application. Additionally, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented in accordance with some embodiments of the application. It should be understood that the operations of the flowcharts may be performed out of order, and steps that have no logical context may be performed in reverse order or concurrently. In addition, those skilled in the art may add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of the present application.

In addition, the described embodiments are only some of the embodiments of the application, not all of the embodiments. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.

It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features stated later, but does not exclude the addition of other features.

In the description of the present application, it should be noted that the terms "first", "second", "third" and so on are only used to distinguish descriptions, and should not be understood as indicating or implying relative importance.

In the description of this application, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

In the existing technology, as the number of electric vehicles gradually increases, the charging demand for electric vehicles for private use is also gradually expanding. In the charging scene of private electric vehicles, the vehicles park for a relatively long time in the scene, and most vehicles are not suitable for charging. The pursuit of power extremes is not strong, the demand for the number of charging piles is large, and the total power of the scene is relatively small. At present, considering the characteristics of the above scenarios, a large number of AC charging piles or low-power DC chargers are usually selected for destination charging scenarios to meet the charging needs of more parking spaces under the condition of limited total capacity. For occasional fast energy replenishment needs, high-power DC chargers can be installed in some parking spaces to meet the rapid energy replenishment needs of some users.

However, arranging high-power DC chargers in some parking spaces will reduce the number of charging piles, and will cause redundant waste of charging power during periods when there is no need for rapid energy replenishment.

In addition, for sporadic fast energy replenishment needs, it is also possible to use a centralized layout of one-to-many charging piles to realize the retrieval and distribution of charging pile power; or to upgrade the technology of the old charging piles that have been deployed to increase the charging power.

The use of a centralized layout with multiple charging piles will lead to increased cable costs, increased construction costs, limited or wasteful space layout, and the relatively large volume of the charging piles and high noise; technical upgrades to the old charging piles that have been laid out will lead to This leads to huge costs and great economic pressure on operators.

In view of the above problems, this application proposes a charging pile expansion device 1 and a charging system. The charging pile expansion device 1 can select one or more charging piles to be used together by connecting with each charging pile and judging the charging status of each charging pile. Charge the vehicle to realize rapid energy replenishment of the vehicle.

FIG. 1 is a schematic diagram of an application scenario of a charging pile expansion device 1 provided in an embodiment of the present application. As shown in Figure 1, the site where the charging pile expansion device 1 is located has multiple charging piles that have been built, each charging pile corresponds to a charging parking space, and electric vehicles can be parked in the charging parking space and connected to a charging gun for charging. The present application provides a plurality of charging pile expansion devices 1, the number of which is greater than or equal to two. Each charging pile expansion device 1 is connected to multiple charging piles, which can be installed on any charging pile or on the wall. As shown in Figure 1, the charging pile expansion device 1 is hung on the side away from the charging pile. A realization on the wall. When the electric vehicle does not need fast energy replenishment, the driver can park the electric vehicle in the original parking space and use the original charging pile for charging. When some electric vehicles need fast energy replenishment, the driver can park the car in the parking space next to the charging pile expansion device 1, and use the charging pile expansion device 1 to quickly replenish the electric vehicles. When the original charging piles are all occupied, the driver can also park the electric vehicle that does not need fast energy replenishment on the parking space next to the charging pile expansion device 1 and connect it to the charging equipment for charging. It is worth noting that the charging pile expansion device 1 can obtain the power demand of the electric vehicle by connecting to the electric vehicle, and output the corresponding charging power flow, or obtain the user's demand, and output the charging power flow equal to or less than the power demand of the electric vehicle. When both the charging pile and the charging pile expansion device 1 are used in the scene, the charging pile expansion device 1 can display the current number of vehicles in the queue for the user.

Fig. 2 is a schematic diagram of a connection method between a charging pile expansion device 1 and a charging pile provided in an embodiment of the present application. As shown in FIG. 2 , each charging pile expansion device 1 is electrically and communicatively connected to multiple charging piles, and each charging pile expansion device 1 is independent of each other. The charging pile expansion device 1 obtains the power flow output by at least one connected charging pile by connecting multiple charging pile terminals, so that it can provide a charging power flow that is greater than or equal to that provided by a single original charging pile, or it can The power output of each charging pile is controlled by communicating with multiple charging piles. Specifically, when the charging pile expansion device 1 is connected to an electric vehicle with a demand for fast energy replenishment and receives a start signal, after obtaining the power demand of the electric vehicle, the charging pile is obtained according to the number of charging piles that need to be connected according to the judgment. The output charging power flow is used to replenish energy for electric vehicles. It is worth mentioning that the communication connection may be wireless connection via bluetooth, or wired connection via twisted pair, coaxial cable, etc., which is not limited here.

FIG. 3 is a schematic structural diagram of a charging pile expansion device 1 . As shown in FIG. 3 , the charging pile expansion device 1 includes a plurality of power input interfaces, a power switching unit 10 and a plurality of power output interfaces. The charging pile expansion device 1 will be introduced in detail below.

Optionally, the power switching unit 10 includes: multiple power switch modules, and the multiple power switch modules are connected in parallel.

Optionally, the number of multiple power switch modules may be the same as the number of charging pile expansion devices 1 . Exemplarily, a total of 10 charging piles can be used for capacity expansion in the charging scene, and the current charging pile expansion device 1 may include 10 power switch modules corresponding to the charging piles.

Optionally, the power switch module can control the charging power flow sent by the charging pile, such as controlling its on-off and magnitude.

Optionally, one end of each power input interface is respectively connected to a charging pile, and the other end of each power input interface is respectively connected to an input end of a power switch module in the power switching unit 10 .

Optionally, the charging pile expansion device 1 is connected to each charging pile through a cable, and the power input interface may be a cable interface. It should be noted that the number of power input interfaces can be greater than the number of charging piles in the charging scene, and can also be equal to or smaller than the number of charging piles in the charging scene. If the number of power input interfaces is greater than the number of charging piles, the remaining power input interfaces can be used as backup power input interfaces. If the number of power input interfaces is less than the number of charging piles, when the charging pile expansion device 1 is used, the nearest charging pile is selected to be connected.

Optionally, each power input interface may correspond to a power switch module one by one. When the power input interface is connected to the charging pile, the input end of the power switch module can receive the charging power flow.

Optionally, one end of each power output interface is respectively connected to output ends of one or more power switch modules in the power switching unit 10 .

Optionally, the number of power output interfaces may be smaller than the connected power input interfaces, that is, the number of power output interfaces may be smaller than the power switch modules corresponding to the power input interfaces. Because the power switch modules are connected in parallel to converge the charging power flow and output it to one or more power output interfaces, the purpose of capacity expansion can be achieved.

Optionally, the power output interface and the charging unit may be connected through a cable, and the power output interface may be a cable interface. The power output interface is used to receive the charging power flow controlled by the power switch module.

Optionally, the other end of each power output interface is used to connect with the charging unit.

Optionally, the charging unit may be a charging gun. The charging gun can be used to charge electric vehicles. The charging gun corresponds to the interface of the electric vehicle, and has a unique protocol, so that the charging gun can be inserted into the electric vehicle, supply power for the electric vehicle, and obtain the charging power demand of the electric vehicle.

Optionally, the number of charging guns may be the same as the number of power output interfaces. The power output interface is used to send the charging power flow controlled by the power switch module to the charging unit.

In this embodiment, the charging pile expansion device includes a plurality of power input interfaces, a power switching unit, and a plurality of power output interfaces. The power switching unit includes: a plurality of power switch modules connected in parallel, and one end of each power input interface Connect to a charging pile respectively, the other end of each power input interface is respectively connected to the input end of a power switch module in the power switching unit, and one end of each power output interface is respectively connected to one or more power switch modules in the power switching unit The output end of each power output interface is used to connect with the charging unit. The charging power flow received by the power input interface from the charging pile is controlled by multiple power switch modules, and then the controlled charging power flow is output to the charging unit through the power output interface, and the charging power flow of multiple charging piles can be selected. Merge and output, expand the layout of charging piles, charge electric vehicles that need fast energy replenishment, meet the high-power charging needs of electric vehicles, avoid the reduction in the number of charging piles caused by the use of high-power DC chargers in some parking spaces, and can Avoid the redundant waste of charging power caused by the time period when there is no need for rapid energy replenishment.

FIG. 4 is a schematic structural diagram of a power control unit 20 . The connection relationship of the power control unit 20 will be described in detail below with reference to FIG. 4 .

Optionally, the charging pile expansion device 1 further includes: a power control unit 20 .

Optionally, the power control unit 20 may include a processor. Wherein the processor can process the information and data related to the request. In some embodiments, a processor may include one or more processing cores. By way of example only, a processor may include a central processing unit, an application specific integrated circuit, a controller, etc., or any combination thereof.

Optionally, the power control unit 20 is connected to each charging pile, and is connected to each power switch module in the power switching unit 10 .

Optionally, the power control unit 20 is configured to collect the charging state and remaining capacity of each charging pile, and send a first control signal to the power switching unit 10 and a second control signal to the charging pile to be used.

Optionally, the power control unit collects the charging state and remaining capacity of each charging pile, can judge the usable state of each charging pile, and regards the usable charging pile as the charging pile to be used. Wherein, the remaining capacity of the charging pile may refer to the remaining electric energy capacity of the charging pile. When the power control unit 20 confirms that the charging pile can be used, when the current charging pile expansion device 1 is connected to an electric vehicle, it sends a second control signal to the charging pile to be used according to its charging demand.

Optionally, the first control signal may control multiple power switch modules in the power switching unit 10 to switch the charging power flow sent by the charging pile into the total power flow, and deliver the total power flow to the power output interface. Wherein, the total power flow may be the actual output power flow. The first control signal may be a power value sent by the power control unit 20 to each power switch module in the power switching unit 10, so that each power switch module selects and controls the charging power flow sent by the charging pile through the power input interface according to the power value, The first control signal can also be a real-time component action instruction sent by the power control unit 20 to each power switch module according to the real-time situation, so that each power switch module can adjust and control the charging power flow in real time according to the component action instruction to make it output charging. The actual power of the power flow is adjusted according to the actual situation.

Optionally, the power control unit 20 can collect the charging state and remaining capacity of each charging pile by communicating with each charging pile. Wherein, the charging status may be whether the charging pile is charging the electric vehicle on the corresponding parking space, or whether it is unusable due to damage. The remaining capacity may be the electric energy that can be used by the charging pile expansion device 1 . Specifically, the electric energy may be the voltage or power of the charging power flow. It is worth noting that the charging pile is already built in the charging scene, and the power of the charging pile is not limited here.

Optionally, the power control unit 20 may send a second control signal to the charging pile to be used by communicating with each charging pile. Specifically, the charging pile expansion device 1 communicates with a plurality of charging piles. When the charging pile expansion device 1 obtains the power demand information of the connected electric vehicle, the power control unit 20 can judge the charging pile to be used according to the real-time power demand of the electric vehicle. charging pile, and send a second control signal to the charging pile to be used, and control multiple charging piles to start outputting electric energy to the power input interface at the same time.

Optionally, the power control unit 20 may be connected to each power switch module, and send a first control signal to each power switch module to control the charging power flow.

Optionally, each power switch module can select and control the on-off and power level of the charging power flow of each charging pile connected to it, and can perform real-time detection of the power-adjusted charging power flow, and send the detection result to the power Control unit 20. Specifically, the power switching unit 10 receives the first control signal sent by the power control unit 20, selects and controls the charging power flow corresponding to the required charging pile according to the first control signal, and controls the charging power flow after the control. Measure to get the actual output power.

Specifically, when the user uses the charging pile expansion device 1 to charge the electric vehicle, the charging pile expansion device 1 will control a certain number of charging piles according to the demand to output the charging power flow, and the corresponding power input interface will pass the charging power flow through each The power switch module outputs to the power output interface after selection and control, and the power output interface sends the controlled charging power flow to the charging unit to make it perform the charging process. In this process, as a possible implementation, when the user uses the charging pile expansion device 1 to charge, the power control unit 20 detects that there is an idle charging pile, and the charging pile expansion device 1 performs the above steps. Charge. As another possible implementation, when the user uses the charging pile expansion device 1 for charging, the power control unit 20 in it detects that there is no idle charging pile to provide the charging power flow of the required amount, then it can follow the preset Rules are enforced.

Optionally, various preset rules may be set on the power control unit 20 . As a first possible implementation, the preset rule can be that when the charging pile expansion device 1 detects that there is no idle charging pile, reduce the charging power flow usage of at least one other charging pile, thereby reducing the charging power of other charging pile expansion equipment 1. Output, so that the current charging pile expansion device 1 can obtain the charging power flow of the remaining charging piles to charge the electric vehicle. Exemplarily, there are six charging piles in the current scene: charging pile a, charging pile b, charging pile c, charging pile d, charging pile e and charging pile f, and charging pile expansion equipment 1A and charging pile expansion equipment are set 1B these two charging piles. The charging piles are all of the same model and can provide a small power flow of 30 kilowatts. The charging pile expansion device 1A is already connected to an electric vehicle that requires 150 kilowatts, so all the charging piles are mobilized to quickly recharge the electric vehicle. At this time, if the charging pile expansion device 1B is connected to an electric vehicle that needs to be quickly replenished, according to the preset rules, the number of charging piles called by the charging pile expansion device 1A can be reduced, for example, choose charging pile a, charging pile b and Charging pile c outputs charging power flow, and charging pile d, charging pile e and charging pile f are selected to provide charging power for electric vehicles connected to charging pile expansion equipment 1B.

As a second possible implementation, the preset rule can be that when the charging pile expansion device 1 detects that there is no idle charging pile, dynamically stop the charging power flow output of at least one other charging pile expansion device 1, so as to expand the current charging pile. The device 1 can use the charging pile used by the stopped charging pile expansion device 1, and when the current electric vehicle is fully charged, continue to start the charging process of the stopped charging pile expansion device 1. Exemplarily, there are six charging piles in the current scene: charging pile a, charging pile b, charging pile c, charging pile d, charging pile e and charging pile f, and charging pile expansion equipment 1A and charging pile expansion equipment are set 1B these two charging piles. The charging piles are all of the same model and can provide a small power flow of 30 kilowatts. The charging pile expansion device 1A is already connected to an electric vehicle that requires 150 kilowatts, so all the charging piles are mobilized to quickly recharge the electric vehicle. At this time, when the charging pile expansion device 1B is connected to an electric vehicle that needs to be quickly recharged, according to the preset rules, the charging operation of the charging pile expansion device 1A can be stopped, so that the charging pile expansion device 1B can use all charging piles. Electric vehicles are currently powered. When the current electric vehicle is fully charged, continue to start the charging action of the charging pile expansion device 1A.

As a third possible implementation, when the charging post and the charging pile expansion device 1 are all occupied, the vehicles to be charged can wait in line, and the user makes a queue reservation through the charging pile expansion device 1 .

In this embodiment, the charging pile expansion device further includes a power control unit, which is connected to each charging pile and to each power switch module in the power switching unit. The power control unit is used to collect the charging status of each charging pile and remaining capacity, and send a first control signal to the power switching unit and a second control signal to the charging pile to be used. The power control unit collects the charging state and remaining capacity of the charging pile, and controls each power switch module to respond to the charging power flow, which can better allocate the charging power flow of each charging pile and maximize the utilization of the charging power flow.

Fig. 5 is a schematic structural diagram of a metering module, and the connection relationship of the metering module will be described in detail below according to Fig. 5 .

Optionally, the power switching unit 10 further includes: a metering module.

Optionally, the metering module may be a device that can measure electricity, such as an electric meter.

Optionally, the output end of each power switch module is connected to one end of each power output interface through the metering module, and is electrically connected to each charging pile. Optionally, the number of metering modules may correspond to the number of power output interfaces.

Optionally, when the charging pile expansion device 1 is working, the power input interface receives the charging power flow output by the charging pile and sends it to each power switch module. The power flow is combined and sent to the metering module, and the metering module measures the received charging power flow and then sends it to the power output interface. The power output interface can send the expanded charging power flow to the charging unit to charge the electric vehicle.

Optionally, each power switch module is configured to selectively control the charging power flow from each charging pile to be used according to the first control signal, and send the charging power flow to the metering module.

Optionally, when the charging unit connected to the power output interface senses that an electric vehicle is connected, it obtains the electric vehicle power demand signal and sends the signal to the power control unit 20, and the power control unit 20, according to the electric vehicle power demand signal, At the same time, combined with the collected charging state and remaining capacity of the charging pile, it is judged to determine the charging pile to be used, and the power control unit 20 sends a second control signal to the charging pile to be used so that the charging pile to be used starts to output the charging power flow, and Send the first control signal to the power switch module in the power switch unit 10, so that it starts to select and control the received charging power flow. The charging power flow at this time may be the actual output power, and the actual output power may be less than or equal to the charging power flow output by the charging pile.

Optionally, the metering module is used to measure the charging power flow and output the charging power flow to multiple power output interfaces.

Optionally, the metering module can be electrically connected to each power switch module and the charging unit, and is used to measure the charging power flow selected and controlled by the power switch module, and the charging power flow at this time can be the actual output power. It is worth noting that the metering module may not consume electric energy, and the charging power flow sent from each power switch module to the metering module may be the same as the charging power flow sent from the metering module to the power output interface.

In this embodiment, the power switching unit further includes: a metering module, the output end of each power switch module is connected to one end of each power output interface through the metering module, and is electrically connected to each charging pile, and each power switch module is used for charging according to the first The control signal selects and controls the charging power flow from each charging pile to be used, and sends the charging power flow to the metering module, and the metering module is used to measure the charging power flow and output the charging power flow to a plurality of power output interfaces. The metering module measures the charging power flow output to the power output unit after being selected and controlled by the power switch module, so as to improve the charging efficiency and meet the needs of some users for fast energy replenishment.

Optionally, the metering module is also used to monitor the voltage and current of the charging power flow, and output a monitoring signal to the power control unit 20 .

Optionally, the metering module is communicatively connected with the power control unit 20, and when the voltage and current in the charging power flow passing through the power switch module are detected, the monitoring signal is sent to the power control unit 20.

Optionally, the power control unit 20 can receive the monitoring signal and send the monitoring signal to the human-machine interaction unit 30 for display, and the power control unit 20 can also judge the actual remaining charging time according to the received detection signal, and share the information Send it to the human-computer interaction unit 30 for display.

In this embodiment, the metering module is also used to monitor the voltage and current of the charging power flow, and output the monitoring signal to the power control unit. By monitoring the voltage and current in the charging power flow through the metering module, the user can know the actual charging power and the remaining charging time, so as to meet the occasional user demand for rapid energy replenishment and avoid redundant waste of electric energy.

Optionally, the power switch module includes any one of the following: a contactor, a relay, an insulated gate bipolar transistor or a thyristor.

Optionally, the contactor can quickly cut off the AC or DC circuit, and can be switched on and off frequently, the relay can play the role of automatic adjustment and safety protection, and the insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) can play the role of switch Function, the thyristor can realize the selective control function.

Optionally, the power switch module can obtain, select and control the charging power flow by including but not limited to contactors, relays, insulated gate bipolar transistors or thyristors, so that the output charging power flow meets the requirements of the connected electric vehicle. At the same time, it also ensures the safety of the overall charging pile expansion equipment 1.

In this embodiment, the power switch module includes any one of the following: a contactor, a relay, an insulated gate bipolar transistor or a thyristor. The charging power flow is selected and controlled by each component to meet the energy supplement requirements of the connected electric vehicles and at the same time ensure the safety of the overall charging pile expansion equipment.

FIG. 6 is a schematic structural diagram of a human-computer interaction unit 30 . Referring to FIG. 6 , the connection structure of the human-computer interaction unit 30 will be further described.

Optionally, the human-computer interaction unit 30 is connected in communication with the power control unit 20, and the power control unit 20 is connected in communication with the charging unit.

Optionally, the power control unit 20 is also configured to receive the interactive control signal sent by the human-computer interaction unit 30 , and receive the charging status of the vehicle sent by the charging unit and send it to the human-computer interaction unit 30 .

Optionally, the power control unit 20 is communicatively connected with the charging unit. When the electric vehicle is connected to the charging unit, the charging unit can obtain the power demand information of the electric vehicle and send the demand information to the power control unit 20. The power control unit 20 The demand information can be sent to the human interaction unit for display.

Optionally, the power control unit 20 can send the received real-time charging status of each charging pile, the actual output power measured by the power switching unit 10, and the charging status of the vehicle sent by the charging unit to the human-computer interaction unit 30, so that the human-computer interaction The unit 30 can display the real-time charging status of each charging pile, the actual output power of the charging pile expansion device 1 and the charging status of the vehicle for the user. It is worth noting that the display content of the human-computer interaction unit 30 can be preset, including but not limited to displaying the real-time charging status of each charging pile, the actual output power of the charging pile expansion device 1 and the charging status of the vehicle.

Exemplarily, the human-computer interaction unit 30 can be equipped with a display screen that displays the real-time charging status of each charging pile, the actual output power of the charging pile expansion device 1 and the charging status of the vehicle, and can also display the charging status of other charging pile expansion devices 1. The status, remaining charging time and user charging waiting time can also display weather information, such as current temperature, humidity and air quality.

Optionally, the human-computer interaction unit 30 can obtain the user's start-stop demand, and send the demand information to the power control unit 20, so that it can control the start-stop of the charging pile expansion device 1 .

Optionally, the user can perform operations such as selection through the human-computer interaction unit 30 . Exemplarily, the human-computer interaction unit 30 may include a liquid crystal touch screen, and the user can select the status and information of the charging pile expansion device 1 to be viewed by touching.

In this embodiment, the charging pile expansion device also includes a human-computer interaction unit, which communicates with the power control unit, and the power control unit communicates with the charging unit. The power control unit is also used to receive the interactive information sent by the human-computer interaction unit. Control signals, and receive the charging status of the vehicle sent by the charging unit and send it to the human-computer interaction unit. The signal received by the power control unit and the information of other charging pile expansion equipment are displayed through the human-computer interaction unit, which allows the user to view the status of the charging pile expansion equipment in the scene in real time, and make a judgment on whether to charge or not, so as to avoid user waste time and improve charging efficiency.

As an optional implementation manner, the human-computer interaction unit 30 includes: operation buttons.

Optionally, the man-machine interaction unit 30 is configured to send an interaction control signal to the power control unit 20 according to the state of the operation button.

Optionally, the operation buttons can be set on the housing of the human-computer interaction unit 30 , or on other positions of the charging pile expansion device 1 . The operation button may include two gear positions of on and off, and may also include three gear positions of on, standby and off.

Optionally, the operation button can limit the operation crowd. Exemplarily, in order to ensure the safe use of the charging pile expansion device 1 , it needs to be confirmed that only staff members can operate it. Specifically, the operating population can be restricted by fingerprints, passwords, etc.

Optionally, the interactive control signal may include an on signal, a standby signal and an off signal.

Specifically, when the operation button is in the opening position, the human-computer interaction unit 30 sends an opening signal to the power control unit 20, so that the charging pile expansion device 1 can start to work. When the operation button is in the standby state, the human-computer interaction unit 30 sends a standby signal to the power control unit 20, and the power control unit 20 can collect the charging pile signal and the charging unit signal according to the standby signal, and send the above-mentioned signals to the human-computer interaction unit 30 to show. When the operation button is in the off state, the human-computer interaction unit 30 sends a close signal to the power control unit 20 to stop the charging pile expansion device 1 from working.

Optionally, the user can also control the human-computer interaction unit 30 through Bluetooth to make a response according to the instruction.

Optionally, the user can also send a command to the charging pile expansion device 1 on the cloud platform by scanning the QR code that matches the charging pile expansion device 1 . Among them, the cloud platform can be built in advance, and it can communicate wirelessly with the charging pile expansion device 1 in the scene. And the expression form of the QR code is not limited. Exemplarily, the two-dimensional code can be displayed on the human-computer interaction interface, and can also be posted on the corresponding charging pile expansion device 1 .

It is worth noting that, in this embodiment, there is no limitation on the form of operation performed by the user on the charging pile expansion device 1 through the human-computer interaction unit 30 .

In this embodiment, the human-computer interaction unit includes an operation button, and the human-computer interaction unit is configured to send an interaction control signal to the power control unit according to a state of the operation button. The real-time status of the charging pile expansion equipment can be controlled by operating the button, which improves the safety of the charging pile expansion equipment, avoids the waste of electric energy, and ultimately improves the charging efficiency.

FIG. 7 is a schematic structural diagram of a power supply unit 40 . The connection relationship of the power supply unit 40 will be described in detail below with reference to FIG. 7 .

Optionally, the charging pile expansion device 1 further includes: a power supply unit 40 .

Optionally, the power supply unit 40 is electrically connected to each power switch module in the power switching unit 10, and is used to supply power to each power switch module.

Optionally, the power supply unit 40 may also be electrically connected to the power control unit 20 and the human-computer interaction unit 30 for supplying power to the power control unit 20 and the human-computer interaction unit 30 .

Exemplarily, the power supply unit 40 may be an auxiliary power supply, which may be used in combination with other power supplies. For example, the human-computer interaction component can be equipped with a battery for power supply.

In this embodiment, the charging pile expansion device further includes a power supply unit, which is electrically connected to the power control unit, the power switching unit, and the human-computer interaction unit, and is used to supply power to the power control unit, the power switching unit, and the human-computer interaction unit. The power control unit, the power switching unit, and the human-computer interaction unit are powered by the power supply unit to enable them to work normally, so that the charging pile expansion equipment can work normally and meet the power consumption needs of users.

An embodiment of the present application also provides a charging system, including multiple charging piles, multiple charging units, and the charging pile expansion device 1 in the foregoing embodiments.

Optionally, the power control unit 20 in each charging pile expansion device 1 communicates with each charging pile, so that the power control unit 20 in each charging pile expansion device 1 can obtain the charging state and remaining capacity of the charging pile, and according to the acquired The charging state and remaining capacity of the charging pile and the charging power demand collected by the charging unit can determine the amount of energy supplied by the charging pile, and select and control the actual power output by controlling the power switching unit 10, so that the charging unit can be used for Power supply for electric vehicles with fast energy replenishment requirements.

Optionally, the power switching unit 10 in each charging pile expansion device 1 is electrically connected to each charging pile through a power cable.

Optionally, the power cable may refer to a power cable, and its specification and length are set according to actual requirements. It is worth noting that the specification of the power cable can be higher than the specification calculated by the maximum power to ensure the safety of electricity use and avoid fire caused by cable overload.

Based on the same idea, the embodiment of the present application also provides a charging system including the charging pile expansion equipment with all the above-mentioned units and the charging pile, because the principle of solving the problem of the charging pile expansion equipment in the embodiment of the application is the same as that of the embodiment of the application The above-mentioned charging pile expansion equipment is similar, so the charging pile expansion equipment in the charging system can refer to the above-mentioned device, and the repetition will not be repeated.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A charging pile expansion device, characterized in that it includes: a plurality of power input interfaces, a power switching unit, and a plurality of power output interfaces; The power switching unit includes: a plurality of power switch modules connected in parallel; One end of each of the power input interfaces is respectively connected to a charging pile, and the other end of each of the power input interfaces is respectively connected to an input end of a power switch module in the power switching unit; One end of each of the power output interfaces is respectively connected to the output ends of one or more power switch modules in the power switching unit; The other end of each power output interface is used to connect with the charging unit. 2. The charging pile expansion device according to claim 1, characterized in that, the charging pile expansion device further comprises: a power control unit; The power control unit is connected to each charging pile, and is connected to each power switch module in the power switching unit; The power control unit is used to collect the charging state and remaining capacity of each charging pile, and send a first control signal to the power switching unit and a second control signal to the charging pile to be used. 3. The charging pile expansion device according to claim 2, wherein the power switching unit further comprises: a metering module; The output end of each power switch module is connected to one end of each power output interface through the metering module, and is electrically connected to each charging pile; Each of the power switch modules is configured to selectively control the charging power flow from each charging pile to be used according to the first control signal, and send the charging power flow to the metering module; The metering module is used for metering the charging power flow and outputting the charging power flow to the plurality of power output interfaces. 4. The charging pile capacity expansion device according to claim 3, wherein the metering module is further configured to monitor the voltage and current of the charging power flow, and output a monitoring signal to the power control unit. 5 . The charging pile expansion device according to claim 1 , wherein the power switch module includes any one of the following: a contactor, a relay, an insulated gate bipolar transistor or a thyristor. 6. The charging pile expansion device according to claim 2, characterized in that, the charging pile expansion device further comprises: a human-computer interaction unit; The human-computer interaction unit is connected in communication with the power control unit, and the power control unit is connected in communication with the charging unit; The power control unit is also used to receive the interactive control signal sent by the human-computer interaction unit, and receive the charging status of the vehicle sent by the charging unit and send it to the human-computer interaction unit. 7. The charging pile expansion device according to claim 6, wherein the human-computer interaction unit includes: an operation button; The man-machine interaction unit is configured to send the interaction control signal to the power control unit according to the state of the operation button. 8. The charging pile expansion device according to claim 1, characterized in that, the charging pile expansion device further comprises: a power supply unit; The power supply unit is electrically connected to each power switch module in the power switching unit, and is used to supply power to each power switch module. 9. A charging system, characterized in that the charging system comprises: a plurality of charging piles, a charging unit, and a plurality of charging pile expansion devices according to any one of claims 1-8. 10 . The charging system according to claim 9 , wherein each power switch module of the power switching unit in each charging pile expansion device is electrically connected to each charging pile through a power cable. 11 .