Charging pile switch control device, charging control method and charging pile

Abstract

The invention provides a charging pile switch control device, a charging control method and a charging pile, the charging pile switch control device comprises a power supply module, a control module, a switching module and an interface module, the control module is connected with the interface module through the switching module, and the interface module is connected with a to-be-charged vehicle through a charging gun. The control module controls the power supply module to charge the to-be-charged vehicle; the power supply module is used for providing charging voltage for a to-be-charged vehicle; the control module is used for providing a control signal for the switching module; the switching module at least comprises a plurality of groups of switch control units and communication units, the switch control units respectively correspond to the charging guns, the communication units are connected with the charging guns, the switching module is provided, the switching module comprises a plurality of groups of switch control units and communication units, and each group of switch control unit controls one charging gun. And the communication lines are switched through the communication unit, so that one set of switching module is adopted, a plurality of charging guns can be charged, and the cost of the charging pile is reduced.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a switch control device for a charging pile, a charging control method, and a charging pile. Background Art

[0002] With the increasing popularity of electric vehicles, more and more families own multiple electric vehicles, leading to a growing demand for home DC charging stations. Currently, small home DC charging stations are single-pole charging stations, and large charging stations cannot be installed for individual users within residential communities. This situation forces users of home charging stations to wait in long queues, waiting for their previous vehicle to charge before manually operating the station to charge their next electric vehicle, or to purchase and install a second charging station to meet their charging needs. This not only wastes users' time but also significantly reduces the efficiency of the charging stations. Therefore, finding a way to charge multiple vehicles while minimizing costs is an urgent issue. Summary of the Invention

[0003] Some embodiments of the present application aim to provide a switch control device, a charging control method and a charging pile for a charging pile. According to the technical solution of the embodiments of the present application, the switch control device includes: a power supply module, a control module, a switching module and an interface module, wherein the control module is connected to the interface module through the switching module, and the interface module is connected to the vehicle to be charged through the charging gun, and the control module controls the power supply module to charge the vehicle to be charged; the power supply module is used to provide a charging voltage for the vehicle to be charged; the control module is used to provide a control signal to the switching module; the switching module includes at least multiple groups of switch control units and communication units, the switch control units correspond to the charging guns respectively, and the communication units are connected to the charging guns. In the embodiments of the present application, a switching module is provided, which includes multiple groups of switch control units and communication units. Each group of switch control units controls one charging gun and switches the communication line through the communication unit, so that a set of switching modules can be used to charge multiple charging guns and reduce the cost of the charging pile.

[0004] In a first aspect, some embodiments of the present application provide a switch control device for a charging pile, the switch control device comprising: a power supply module, a control module, a switching module, and an interface module, wherein the control module is connected to the interface module via the switching module, the interface module is connected to a vehicle to be charged via a charging gun, and the control module controls the power supply module to charge the vehicle to be charged; The power supply module is used to provide charging voltage for the vehicle to be charged; The control module is used to provide a control signal to the switching module; The switching module at least includes multiple groups of switch control units and communication units. The switch control units correspond to the charging guns respectively, and the communication units are connected to the charging guns.

[0005] Some embodiments of the present application provide a switching module, which includes multiple groups of switch control units and communication units. Each group of switch control units controls one charging gun and switches the communication line through the communication unit. In this way, one set of switching modules can be used to charge multiple charging guns and reduce the cost of charging piles.

[0006] Optionally, the switch control unit includes at least a resistor and an optocoupler switch, the first end of the resistor is connected to a DC power supply, the second end of the resistor is connected to a third end of the optocoupler switch, the fourth end of the optocoupler switch is connected to the interface module, the first end of the optocoupler switch is connected to the control module, and the second end of the optocoupler switch is connected to the ground.

[0007] Some embodiments of the present application provide a switch control unit, which includes a resistor and an optocoupler switch, to control the charging gun and achieve switching control of different charging guns.

[0008] Optionally, the GPIO1 pin of the control module is connected to the first end of the first coupling switch in the first switch control unit; the GPIO2 pin of the control module is connected to the first end of the second coupling switch in the second switch control unit. Some embodiments of the present application are connected to different switch control units through different pins of the control module, thereby sending control signals to the different switch control units.

[0009] Optionally, the communication unit includes a CAN chip, a third optocoupler switch, and a fourth optocoupler switch, wherein the GPIO3 pin of the control module is connected to the first pin of the third optocoupler switch, the second pin of the third optocoupler switch is connected, the third pin of the third optocoupler switch is connected to the interface module, and the fourth pin of the fourth optocoupler switch is connected to the low-level pin of the CAN chip; The GPIO4 pin of the control module is connected to the first pin of the fourth optocoupler switch, the second pin of the fourth optocoupler switch is connected, the third pin of the fourth optocoupler switch is connected to the low level pin of the CAN chip, and the fourth pin of the fourth optocoupler switch is connected to the interface module.

[0010] Optionally, the high level pin of the CAN chip is connected to the interface module.

[0011] In some embodiments of the present application, a communication unit in a switching module is provided to switch an optocoupler switch in the communication unit, thereby controlling different charging guns. Optionally, the interface module further includes an auxiliary power pin, and the auxiliary power pin is used to provide auxiliary power for the vehicle to be charged.

[0012] Optionally, the auxiliary power supply is a 12V DC power supply.

[0013] Some embodiments of the present application provide two gun lines connected in parallel to auxiliary power supplies A+ and A-, which are powered by the same power supply, and the auxiliary power supply is achieved by controlling CC1.

[0014] In a second aspect, some embodiments of the present application provide a charging control method, which is applied to the switch control device of the charging pile described in the first aspect, and the method includes: Connecting a plurality of slave charging guns to the interface module; When the voltage value at the preset point meets the preset value and the switch control unit in the switching module is closed, charging the charging gun connected to the switch control unit; After the charging gun is charged, the switch control unit is disconnected, and other switch control units are closed to charge other charging guns.

[0015] Through intelligent control and management, the charging pile in the embodiment of the present application can ensure the safety and stability of the charging process, avoiding safety hazards caused by misoperation or equipment failure.

[0016] Optionally, the method further includes: Multiple power supply lines are switched through the communication unit in the switching module.

[0017] In a third aspect, some embodiments of the present application provide a charging pile, comprising the switch control device of the charging pile described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of some embodiments of the present application, the following is a brief introduction to the drawings required for use in some embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a switch control device for a charging pile provided in an embodiment of the present application; Figure 2 A schematic structural diagram of a switch control device for another charging pile provided in an embodiment of the present application; Figure 3A flow chart of the charging control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in some embodiments of the present application will be described below in conjunction with the drawings in some embodiments of the present application.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0022] With the increasing popularity of electric vehicles, more and more families own multiple electric vehicles, leading to a growing demand for home DC charging stations. Currently, small home DC charging stations are single-pole charging stations, and large charging stations cannot be installed for individual users within residential communities. This situation forces users of home charging stations to wait in long queues for their previous vehicle to finish charging before manually operating the charging station to charge their next electric vehicle, or to purchase and install a second charging station to meet their charging needs. This not only wastes the user's time, but also greatly reduces the efficiency of the use of the charging pile. Therefore, how to charge multiple vehicles while reducing costs is a problem that urgently needs to be solved. In view of this, some embodiments of the present application provide a switch control device for a charging pile, which includes: a power supply module, a control module, a switching module and an interface module, wherein the control module is connected to the interface module through the switching module, and the interface module is connected to the vehicle to be charged through the charging gun, and the control module controls the power supply module to charge the vehicle to be charged; the power supply module is used to provide charging voltage for the vehicle to be charged; the control module is used to provide a control signal to the switching module; the switching module includes at least multiple groups of switch control units and communication units, the switch control units correspond to the charging guns respectively, and the communication units are connected to the charging guns. In the embodiment of the present application, a switching module is provided, which includes multiple groups of switch control units and communication units. Each group of switch control units controls one charging gun and switches the communication line through the communication unit, so that a set of switching modules can be used to charge multiple charging guns and reduce the cost of the charging pile.

[0023] like Figure 1 As shown, an embodiment of the present application provides a switch control device for a charging pile, which includes: a power supply module 101, a control module 102, a switching module 103 and an interface module 104, wherein the control module is connected to the interface module through the switching module, and the interface module is connected to the vehicle to be charged through the charging gun 105, and the control module controls the power supply module to charge the vehicle to be charged; The power supply module 101 is used to provide charging voltage for the vehicle to be charged; The control module 102 is used to provide a control signal to the switching module; The switching module 103 at least includes multiple groups of switch control units and communication units. The switch control units correspond to the charging guns respectively, and the communication units are connected to the charging guns.

[0024] The control module is a controller, for example, a single chip microcomputer.

[0025] The switching module may include multiple groups of switch control units, which can be two or more groups. Each switch control unit corresponds to one charging gun, and each switch control unit controls one charging gun. At the same time, multiple groups of switch control units can be switched. After one charging gun completes charging the vehicle to be charged, it switches to other charging guns, and uses other charging guns to charge other vehicles to be charged.

[0026] The power supply module can provide 220V AC or 380V AC to the vehicle to be charged.

[0027] The interface module is a terminal assembly, which includes various pins of the output end of the switching module, and the interface module is connected to multiple charging guns.

[0028] Specifically, if Figure 2 The circuit diagram shown includes three parts: DC power supply (i.e. power supply module), controller chip (i.e. control module) and internal circuit part of the control board (i.e. switching module); The control module connects auxiliary power supplies A+ and A-, and CAN interface S+ and S-, through a single connector. Auxiliary power supplies A+ and A- provide the vehicle with a low-voltage auxiliary power supply of 12V. S+ and S- represent the CAN interface's CAN high and CAN low, respectively, and are primarily used for charging protocol communication between the charging station and the electric vehicle. Auxiliary power supplies A+ and A- connect to charging connectors 1 and 2, respectively, at the control board interface. The charging station control board has two CC1 circuits, one for each.

[0029] High-voltage power supply is the power supply module: DC+ and DC- are connected to two charging guns through the same charging interface. This parallel connection method realizes the connection of power supply DC+ and DC- and ground wire PE. After the user connects the vehicle, a power supply loop is formed; DC+, DC- and PE are divided into two paths at the power supply interface: charging gun (1) and charging gun (2).

[0030] Some embodiments of the present application provide a switching module, which includes multiple groups of switch control units and communication units. Each group of switch control units controls one charging gun and switches the communication line through the communication unit. In this way, one set of switching modules can be used to charge multiple charging guns and reduce the cost of charging piles.

[0031] Another embodiment of the present application further supplements the switch control device of the charging pile provided in the above embodiment.

[0032] like Figure 2 As shown, optionally, the switch control unit includes at least a resistor and an optocoupler switch, the first end of the resistor is connected to the DC power supply, the second end of the resistor is connected to the third end of the optocoupler switch, the fourth end of the optocoupler switch is connected to the interface module, the first end of the optocoupler switch is connected to the control module, and the second end of the optocoupler switch is connected to the ground.

[0033] Specifically, the switching module includes two CC1 circuits, each CC1 circuit is connected to a resistor and an optocoupler switch, that is, each CC1 circuit corresponds to a switch control unit, which controls the on and off of the optocoupler switch by identifying voltage changes through voltage division.

[0034] The control module controls the optocoupler switch through the GPIO interface to achieve connection and charging control of the two charging guns.

[0035] Some embodiments of the present application provide a switch control unit, which includes a resistor and an optocoupler switch, to control the charging gun and achieve switching control of different charging guns.

[0036] Optionally, the GPIO1 pin of the control module is connected to the first end of the first coupling switch in the first switch control unit; the GPIO2 pin of the control module is connected to the first end of the second coupling switch in the second switch control unit.

[0037] like Figure 2 As shown, the GPIO1 pin of the control module is connected to the first end of the first coupling switch (optocoupler switch 1) in the first switch control unit; the first end of the resistor R1 is connected to the DC power supply (12V), the second end of the resistor R1 is connected to the third end of the optocoupler switch (optocoupler switch 1), the fourth end of the optocoupler switch (optocoupler switch 1) is connected to the interface module, the first end of the optocoupler switch (optocoupler switch 1) is connected to the control module, and the second end of the optocoupler switch (optocoupler switch 1) is connected to ground; The GPIO2 pin of the control module is connected to the first end of the second coupling switch (optocoupler switch 2) in the second switch control unit, the first end of the resistor R2 is connected to the DC power supply (12V), the second end of the resistor R2 is connected to the third end of the optocoupler switch (optocoupler switch 2), the fourth end of the optocoupler switch (optocoupler switch 2) is connected to the interface module, the first end of the optocoupler switch (optocoupler switch 2) is connected to the control module, and the second end of the optocoupler switch (optocoupler switch 1) is connected to ground.

[0038] For example, a charging pile is equipped with two charging guns, which are connected in parallel to the same charging pile interface. The charging gun power harness is also connected in parallel to the charging pile interface to ensure that both charging guns can provide power simultaneously. The charging pile control board has intelligent recognition capabilities, automatically identifying and distinguishing between the first connected electric vehicle (the primary charging gun) and the second connected electric vehicle (the secondary charging gun). By switching the CC1 circuit, the control board can manage the charging process of the two charging guns in an orderly manner according to the charging plan.

[0039] Some embodiments of the present application are connected to different switch control units through different pins of the control module, thereby sending control signals to the different switch control units.

[0040] Optionally, the communication unit includes a CAN chip, a third optocoupler switch, and a fourth optocoupler switch, wherein the GPIO3 pin of the control module is connected to the first pin of the third optocoupler switch, the second pin of the third optocoupler switch is connected, the third pin of the third optocoupler switch is connected to the interface module, and the fourth pin of the fourth optocoupler switch is connected to the low level pin of the CAN chip; The GPIO4 pin of the control module is connected to the first pin of the fourth optocoupler switch, the second pin of the fourth optocoupler switch is connected, the third pin of the fourth optocoupler switch is connected to the low level pin of the CAN chip, and the fourth pin of the fourth optocoupler switch is connected to the interface module.

[0041] Optionally, the high level pin of the CAN chip is connected to the interface module.

[0042] The CAN interface connects two charging guns through the same connector to achieve low-voltage auxiliary power supply and charging protocol communication.

[0043] Specifically, the CAN_TX pin and CAN_RX pin of the control module are connected to the CAN chip respectively, and the high-level pin CAN_H of the CAN chip is connected to the interface module; The GPIO3 pin of the control module is connected to the first pin of the third optocoupler switch (optocoupler switch 3), the second pin of the third optocoupler switch (optocoupler switch 3) is connected, the third pin of the third optocoupler switch (optocoupler switch 3) is connected to the interface module, and the fourth pin of the third optocoupler switch (optocoupler switch 3) is connected to the low-level pin CAN_L of the CAN chip; The GPIO4 pin of the control module is connected to the first pin of the fourth optocoupler switch (optocoupler switch 4), the second pin of the fourth optocoupler switch (optocoupler switch 4) is connected, the third pin of the fourth optocoupler switch (optocoupler switch 4) is connected to the low-level pin CAN_L of the CAN chip, and the fourth pin of the fourth optocoupler switch (optocoupler switch 4) is connected to the interface module; In some embodiments of the present application, a communication unit in a switching module is provided to switch an optocoupler switch in the communication unit, thereby controlling different charging guns. Optionally, the interface module further includes an auxiliary power pin, which is used to provide auxiliary power to the vehicle to be charged.

[0044] Optionally, the auxiliary power supply is a 12V DC power supply.

[0045] That is to say, the same auxiliary power supply A+ and A- are connected in parallel to the interface module to provide auxiliary power for the controller of the vehicle to be charged.

[0046] Some embodiments of the present application provide two gun lines connected in parallel to auxiliary power supplies A+ and A-, which are powered by the same power supply, and the auxiliary power supply is achieved by controlling CC1.

[0047] The embodiment of the present application provides an intelligent charging pile interface control system, which uses the same auxiliary power supply, electronic lock relay and S+ of the CAN wiring harness, and uses two CAN lines S- and CC1 at the same time. The circuit is supplemented by an optocoupler switch to connect and control the two charging gun lines. The core is that a small household charging pile uses one charging interface to connect two charging gun lines and simultaneously quickly and intelligently identify, connect and control the charging of different types of electric vehicles. The CC1 control guide switching is accurately controlled according to the user's charging plan. At the same time, the S- of the two CAN lines is switched according to the switching of the relevant CC1, so that the charging pile can charge the two electric vehicles in an orderly manner. This intelligent connection control greatly improves the convenience of charging for users and improves the utilization efficiency of charging piles. It not only reduces the cost of users purchasing charging piles again, but also saves the cost of charging piles compared to traditional dual-gun charging piles that require adding multiple control components (CAN transceiver circuits, relay circuits) to the control board.

[0048] It should be noted that each implementable method in this embodiment can be implemented separately, or can be implemented in combination in any combination without conflict, and this application does not limit it.

[0049] Another embodiment of the present application provides a charging control method, which is used to execute the switch control device of the charging pile provided in the above embodiment.

[0050] like Figure 3 FIG. 1 is a flow chart of a charging control method provided in an embodiment of the present application, which is applied to the switch control device of the above-mentioned charging pile. The method includes: Connect multiple slave charging cables to the interface module; When the voltage value at the preset point meets the preset value and the switch control unit in the switching module is closed, the charging gun connected to the switch control unit is charged; After the charging gun is fully charged, the switch control unit is disconnected, and other switch control units are closed to charge other charging guns.

[0051] For example, when the charging pile is connected to two electric vehicles (i.e., vehicles to be charged) for the first time, the control board identifies the first connected charging gun as the main charging gun and the second connected charging gun as the auxiliary charging gun.

[0052] If the user disconnects the main charging cable and reconnects it before charging, the control panel will enter a delay state (e.g., 5 minutes), during which the second main and auxiliary charging cable identification will not be initiated.

[0053] During the charging process, the main electric vehicle is charged first and the auxiliary charging gun is on standby.

[0054] When the main electric vehicle is fully charged, the control panel automatically switches to the auxiliary charging gun to continue charging the second electric vehicle.

[0055] After charging is completed, the control board records the charging status and reinitializes the identification process during the next charging.

[0056] Through intelligent control and management, the charging pile in the embodiment of the present application can ensure the safety and stability of the charging process, avoiding safety hazards caused by misoperation or equipment failure.

[0057] Optionally, the method further includes: Multiple power supply lines are switched by means of the communication unit in the switching module.

[0058] Some embodiments of the present application provide a charging pile, including the above-mentioned switch control device of the charging pile.

[0059] In the embodiment of the present application, the steps for charging the vehicle to be charged are as follows: Step 1: CC1 interface identification: The charging pile control board has two CC1 circuits. The two CC1 circuits are connected to a 12V power supply respectively. Each CC1 is connected to a resistor, and the circuit divides the voltage to identify the voltage change. An optocoupler switch is connected after the resistor, namely optocoupler switch 1 and switch 2. The optocoupler switches are connected to GND respectively. Finally, CC1 is connected to the charging interface terminal of the control board. The control board controls optocoupler switch 1 through GPIO1, and optocoupler switch 2 through GPIO2. There are two interfaces on the CC1 control panel, which are connected to two charging guns respectively. When the vehicle is not connected, the main charging gun and auxiliary charging gun programs of the control panel will not start.

[0060] CC1 triggering process: (1) When the user connects the two charging guns, the CC1 voltage program of the two channels is displayed as 4V (detected by the ABD detector). At this time, the switch remains closed, which is a high level; (2) The control board main control program identifies the first connected charging gun CC1 as the main charging gun by default, and the second connected charging gun as the auxiliary charging gun; (3) When the main charging gun completes charging, CC1 of the main charging gun is disconnected and CC1 of the auxiliary gun begins to close. At this time, the voltage of CC1 of the auxiliary gun becomes 4V; Step 2: Auxiliary power supply DC power supply part: Charging guns 1 and 2 are connected in parallel with A+ and A-, triggering process: when charging gun 1CC1 becomes 4V and CAN_L is closed, auxiliary power A+ and A- are supplied.

[0061] Step 3: CAN line signal control: The CAN line controls the on / off mode of the two S- lines through an optocoupler switch to realize the communication control of CAN_L; the control board interface S- is connected to charging gun 1 and charging gun 2 respectively, GPIO3 controls the on / off of charging gun 1 CAN_L (S-), and GPIO4 controls the on / off of charging gun 2 CAN_L (S-); CAN_L (S-) is closed when CC1 is closed. If CC1 is disconnected, the control board sends a low level to the optocoupler switch through the GPIO interface to disconnect CAN_L.

[0062] The control flow of the CAN signal is as follows: When CC1 of charging gun 1 becomes 4V, CC1 of charging gun 2 is disconnected, the S- optocoupler 3 connected to CAN_L of charging gun 1 is closed, and the optocoupler switch 4 is disconnected. At this time, charging gun 1 becomes the main charging gun and starts CAN signal communication; When charging gun 1 finishes charging, the CC1 switch 1 of charging gun 1 is disconnected and the optocoupler of CAN harness S- is disconnected. Charging gun 2, i.e., the slave charging gun CC1, becomes optocoupler switch 1 closed, CC1 is 4V, and the S- optocoupler 4 connected to CAN_L is closed, starting charging communication; Step 4: The DC+ and DC- connected DC power supply supplies power to the electric vehicle. The specific power supply process is as follows: (1) CAN_L of charging gun 1 is closed, the charging demand signal is received, and charging is started.

[0063] (2) Charging of charging gun 1 is completed. The CAN signal receives the end charging signal and charging is completed. DC+ and DC- charging stop. Charging gun 2 (the slave charging gun) CC1 optocoupler is closed and CAN_L S- optocoupler 4 is closed, starting DC+ and DC- charging.

[0064] After charging is completed, the control chip sends a high level to the optocoupler switches 1, 2, 3 and 4, and the switches remain closed.

[0065] The embodiment of the present application proposes a dual-charging gun charging interface control circuit and control method, which implements a charging plan for two charging guns based on the connection sequence and charging plan of the two charging guns. This design can not only charge two electric vehicles, but also save the cost of a single charging pile.

[0066] The embodiments of the present application have the following advantages: Improve charging convenience: Users can charge two electric vehicles in an orderly manner without waiting in line or installing multiple charging piles, which greatly improves the convenience of charging.

[0067] Improve the utilization efficiency of charging piles: Through intelligent identification and control, the charging pile can orderly manage the charging process of the two charging guns, avoiding idleness and waste of charging piles.

[0068] Reduced costs: Compared to traditional dual-pole charging stations, this design reduces material and manufacturing costs, reducing the financial burden on users. Furthermore, since there is no need to purchase multiple charging stations, users also save on additional installation and maintenance costs.

[0069] Enhanced safety and stability: Through intelligent control and management, charging piles can ensure the safety and stability of the charging process, avoiding safety hazards caused by misoperation or equipment failure.

[0070] In summary, the present invention proposes an innovative charging pile dual-gun connection and switch control method, which realizes orderly charging management of two charging guns through intelligent identification and control technology, improves charging convenience, charging pile utilization efficiency, safety and stability, and reduces user costs.

[0071] Regarding the device in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method and will not be elaborated here.

[0072] It should be noted that each implementable method in this embodiment can be implemented separately, or can be implemented in combination in any combination without conflict, and this application does not limit it.

[0073] The above are merely examples of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0074] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0075] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A switch control device for a charging pile, characterized in that: The switch control device includes: a power supply module, a control module, a switching module and an interface module, wherein the control module is connected to the interface module via the switching module, the interface module is connected to the vehicle to be charged via a charging gun, and the control module controls the power supply module to charge the vehicle to be charged; The power supply module is used to provide charging voltage for the vehicle to be charged; The control module is used to provide a control signal to the switching module; The switching module at least includes multiple groups of switch control units and communication units. The switch control units correspond to the charging guns respectively, and the communication units are connected to the charging guns.

2. The switch control device of the charging pile according to claim 1, characterized in that: The switch control unit includes at least a resistor and an optocoupler switch, wherein the first end of the resistor is connected to a DC power supply, the second end of the resistor is connected to the third end of the optocoupler switch, the fourth end of the optocoupler switch is connected to the interface module, the first end of the optocoupler switch is connected to the control module, and the second end of the optocoupler switch is connected to the ground.

3. The switch control device of the charging pile according to claim 2, characterized in that: The GPIO1 pin of the control module is connected to the first end of the first coupling switch in the first switch control unit; the GPIO2 pin of the control module is connected to the first end of the second coupling switch in the second switch control unit.

4. The switch control device for the charging pile according to claim 1, characterized in that: The communication unit includes a CAN chip, a third optocoupler switch and a fourth optocoupler switch, wherein the GPIO3 pin of the control module is connected to the first pin of the third optocoupler switch, the second pin of the third optocoupler switch is connected, the third pin of the third optocoupler switch is connected to the interface module, and the fourth pin of the fourth optocoupler switch is connected to the low level pin of the CAN chip; The GPIO4 pin of the control module is connected to the first pin of the fourth optocoupler switch, the second pin of the fourth optocoupler switch is connected, the third pin of the fourth optocoupler switch is connected to the low level pin of the CAN chip, and the fourth pin of the fourth optocoupler switch is connected to the interface module.

5. The switch control device for the charging pile according to claim 4, characterized in that: The high level pin of the CAN chip is connected to the interface module.

6. The switch control device for the charging pile according to claim 1, characterized in that: The interface module further includes an auxiliary power pin, which is used to provide auxiliary power for the vehicle to be charged.

7. The switch control device for the charging pile according to claim 6, characterized in that: The auxiliary power supply is a 12V DC power supply.

8. A charging control method, characterized in that: The switch control device applied to the charging pile according to any one of claims 1 to 7, the method comprising: Connecting a plurality of slave charging guns to the interface module; When the voltage value at the preset point meets the preset value and the switch control unit in the switching module is closed, charging the charging gun connected to the switch control unit; After the charging gun is charged, the switch control unit is disconnected, and other switch control units are closed to charge other charging guns.

9. The charging control method according to claim 8, characterized in that: The method further comprises: Multiple power supply lines are switched through the communication unit in the switching module.

10. A charging pile, characterized in that: A switch control device comprising a charging pile as described in any one of claims 1 to 7.

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