Control systems, integrated controllers, and electric vehicles

Abstract

A control system, an integrated controller, and an electric vehicle are disclosed. The control system includes a charge detection module, a charge control module, and a vehicle controller. A first input port of the charge detection module is configured to connect to a first output port of a charge pile, a second input port of the charge detection module is configured to connect to a first output port of the vehicle controller, and an output port of the charge detection module is configured to connect to a first input port of the vehicle controller. A first input port of the charge control module is configured to connect to a second output port of a charge pile, a second input port of the charge control module is configured to connect to a third output port of a charge pile, a first output port of the charge control module is configured to connect to a second input port of the vehicle controller, and a second output port of the charge control module is configured to connect to a third input port of the vehicle controller.

Description

Technical Field

[0001] This application claims priority to Chinese Patent Application No. 202321038712.3, titled "CONTROL SYSTEM, INTEGRATED CONTROLLER, AND ELECTRIC VEHICLE", filed with the China National Intellectual Property Administration on April 28, 2023, which is incorporated herein by reference in its entirety.

[0002] This application relates to the field of charging of new energy vehicles, and more particularly, to control systems, integrated controllers, and electric vehicles.

Background Art

[0003] Since the charging standards used in various countries are different, in related technologies, usually, an Electric Vehicle Communication Controller (EVCC for short) is arranged outside the motor controller in an electric vehicle. By using the EVCC, conversion between two different charging standards is realized. As a result, the electric vehicle exchanges information with the charging pile to complete the charging process of the electric vehicle. However, an independent main chip needs to be arranged in the EVCC to process various signals to realize the control function, which makes the cost excessively high.

Summary of the Invention

[0004] This application provides a control system, an integrated controller, and an electric vehicle that can use a vehicle controller to process various signals of the EVCC to realize the control function, without the need to use the main chip in the EVCC, thereby greatly reducing the system cost and providing strong applicability.

[0005] According to a first aspect, the present application provides a control system. The control system includes a charge detection module, a charge control module, and a vehicle controller. The first input port of the charge detection module is configured to connect to a first output port of a charge pile, the second input port of the charge detection module is configured to connect to a first output port of the vehicle controller, and the output port of the charge detection module is configured to connect to a first input port of the vehicle controller. The first input port of the charge control module is configured to connect to a second output port of a charge pile, the second input port of the charge control module is configured to connect to a third output port of a charge pile, the first output port of the charge control module is configured to connect to a second input port of the vehicle controller, and the second output port of the charge control module is configured to connect to a third input port of the vehicle controller.

[0006] The control system can use the vehicle controller to process various signals from the EVCC and realize control functions, eliminating the need to use the main chip within the EVCC. This significantly reduces system costs and provides strong applicability. In addition, the charge detection module and charge control module are simplified functional modules obtained by simplifying the analog quantity sampling circuit and switch quantity control circuit within the EVCC. That is, the control system integrates the simplified functional modules of the EVCC and uses the power management circuit and communication or protocol conversion circuit within the vehicle controller. Therefore, control system 2 can simultaneously realize the functions of the EVCC and the vehicle controller, resulting in a higher degree of integration. Furthermore, the power management chip and communication chip within the EVCC do not need to be used, thereby further reducing system costs.

[0007] In a first embodiment, in a possible implementation, the charge detection module includes a disconnection detection circuit, a first signal control circuit, and a gun connection identification circuit. The input terminal of the disconnection detection circuit is connected to a second input port of the charge detection module, the output terminal of the disconnection detection circuit is connected to the input terminal of the first signal control circuit, the output terminal of the first signal control circuit is connected to a first input port of the charge detection module and the input terminal of the gun connection identification circuit, and the output terminal of the gun connection identification circuit is connected to an output port of the charge detection module. The disconnection detection circuit is configured to allow the charge detection module to enter disconnection detection mode, and as a result, it can be understood that the charge pile has the ability to detect the connection status of the DC charge gun. The gun connection identification circuit is configured to detect the connection status of the DC charge gun. The charge detection module has the function of detecting the connection status of the DC charge gun, and after detecting the connection status of the DC charge gun, it enters disconnection detection mode, and as a result, it can be understood that the charge pile has the function of detecting the connection status of the DC charge gun. Thus, the control policy of the control system is simplified and the control efficiency of the control system is improved.

[0008] In a first embodiment, in a possible implementation, the first signal control circuit includes a first switch and a first resistor unit. The first connection terminal of the first switch functions as an input terminal to the first signal control circuit. The second and third connection terminals of the first switch are configured to connect to a first power supply, and the fourth connection terminal of the first switch is connected to the first connection terminal of the first resistor unit. The second connection terminal of the first resistor unit functions as an output terminal to the first signal control circuit. It can be understood that when the third connection terminal of the first switch is in contact with the fourth connection terminal of the first switch, i.e., the first switch is not conducting, the gun connection identification circuit detects the connection state of the DC charging gun. After the gun connection identification circuit detects the connection state of the DC charging gun, the disconnection detection circuit allows the charging detection module to enter disconnection detection mode. In this case, the first switch is conducted, preventing current from flowing to the charging pile.

[0009] In a first embodiment, in a possible implementation, the disconnection detection circuit includes a second switch, a third switch, a first resistor, and a second resistor. The first terminal of the second switch functions as an input terminal to the disconnection detection circuit, and the second terminal of the second switch is connected to the first terminal of the first resistor and the first terminal of the second resistor. The second terminal of the first resistor is configured to be connected to a second power supply, and the second terminal of the second resistor is connected to the first terminal of the third switch, and the second terminal of the third switch functions as an output terminal to the disconnection detection circuit. The third terminal of the second switch and the third terminal of the third switch are grounded. When the second switch is in a saturated on state and the third switch is in a cutoff state, it can be understood that the third terminal of the first switch may be in contact with the fourth terminal of the first switch, i.e., the first switch is not conducting or is turned off. When the second switch is in the off state and the third switch is in the saturated on state, the third terminal of the first switch may be in contact with the fifth terminal of the first switch, i.e., the first switch is conductive. The on / off states of the second and third switches are used to control whether the first switch is conductive or off, and when the first switch is conductive and off, it allows the charge detection module to enter disconnection detection mode, and as a result the charge pile may detect the connection status of the DC charging gun, and the gun connection identification circuit may detect the connection status of the DC charging gun.

[0010] In the first embodiment, in possible implementations, the gun connection identification circuit includes a comparator. The inverting input terminal of the comparator functions as the input terminal of the gun connection identification circuit, the non-inverting input terminal of the comparator is connected to a reference voltage, and the output terminal of the comparator functions as the output terminal of the gun connection identification circuit. The comparator may also detect the connection status of the DC charging gun based on the result of a comparison between a second voltage and a reference voltage, which can be understood to simplify the control policy of the control system and improve the control efficiency of the control system.

[0011] In a first embodiment, in a possible implementation, the charge detection module further includes a third protection circuit, the third protection circuit including a third transient suppression diode, a fifth resistor, and a diode unit. The first connection terminal of the third transient suppression diode functions as an input terminal to the third protection circuit, the first connection terminal of the third transient suppression diode is connected to the first connection terminal of the fifth resistor, and the second connection terminal of the third transient suppression diode is grounded. The second connection terminal of the fifth resistor and the first connection terminal of the diode unit are connected to function as output terminals of the third protection circuit, the second connection terminal of the diode unit is configured to connect to a fifth power supply, and the third connection terminal of the diode unit is grounded. The third protection circuit may perform overvoltage and overcurrent protection on the comparator to prevent damage to the comparator, and it may be understood that as a result the Gunn connection identification circuit operates normally, thereby improving the safety and reliability of the comparator.

[0012] In a first embodiment, in a possible implementation, the charge control module includes a first protection circuit and a second signal control circuit. The input terminals of the first protection circuit are connected to a first input port of the charge control module, the first output terminals of the first protection circuit are connected to an input terminal of the second signal control circuit, and the output terminals of the second signal control circuit are connected to a first output port of the charge control module.

[0013] In a first embodiment, in a possible implementation, the second signal control circuit includes a first photocoupler and a third resistor. The first connection terminal of the first photocoupler functions as an input terminal to the second signal control circuit, the second and third connection terminals of the first photocoupler are connected to the first connection terminal of the third resistor, the first connection terminal of the third resistor functions as an output terminal to the second signal control circuit, the second connection terminal of the third resistor is configured to connect to a third power supply, and the fourth and fifth connection terminals of the first photocoupler are grounded. The first photocoupler can perform signal isolation between the first protection circuit and the first output port, improving the response speed and interference immunity of the second signal control circuit, and thus it can be understood that it has greater applicability.

[0014] In a first embodiment, in a possible implementation, the charge control module further includes a second protection circuit and a third signal control circuit. The first input terminal of the second protection circuit is connected to a second input port of the charge control module, and the second input terminal of the second protection circuit is connected to a second output terminal of the first protection circuit. The first output terminal of the second protection circuit is connected to a first input terminal of the third signal control circuit, and the second output terminal of the second protection circuit is connected to a second input terminal of the third signal control circuit, and the output terminal of the third signal control circuit is connected to a second output port of the charge control module.

[0015] In a first embodiment, in a possible implementation, the third signal control circuit includes a second photocoupler and a fourth resistor. The first connection terminal of the second photocoupler functions as the first input terminal of the third signal control circuit, the second connection terminal of the second photocoupler functions as the second input terminal of the third signal control circuit, and the third and fourth connection terminals of the second photocoupler are connected to the first connection terminal of the fourth resistor. The first connection terminal of the fourth resistor functions as the output terminal of the third signal control circuit, the second connection terminal of the fourth resistor is configured to connect to a fourth power supply, and the fifth connection terminal of the second photocoupler is grounded. It can be understood that the second photocoupler can perform signal isolation between the second protection circuit and the second output port, improving the response speed and interference immunity of the third signal control circuit, and thus having greater applicability.

[0016] In a first embodiment, in a possible implementation, the first protection circuit includes a first transient suppression diode, a second resistor unit, a capacitor, and a first diode. The first connection terminal of the first transient suppression diode functions as an input terminal to the first protection circuit, the first connection terminal of the first transient suppression diode is connected to the first connection terminal of the second resistor unit, the first connection terminal of the second resistor unit functions as a second output terminal of the first protection circuit, and the second connection terminal of the first transient suppression diode is grounded. The second connection terminal of the second resistor unit, the first connection terminal of the capacitor, and the negative terminal of the first diode are connected to function as first output terminals of the first protection circuit, and the third connection terminal of the second resistor unit, the second connection terminal of the capacitor, and the positive terminal of the first diode are grounded. The first protection circuit is configured to provide overvoltage and overcurrent protection to the second signal control circuit to ensure that the second signal control circuit does not burn out, thereby improving the safety and reliability of the second signal control circuit.

[0017] In a first embodiment, in a possible implementation, the second protection circuit includes a second transient suppression diode, a third resistor unit, and a second diode. The first connection terminal of the second transient suppression diode functions as the first input terminal of the second protection circuit, and the first connection terminal of the second transient suppression diode is connected to the first connection terminal of the third resistor unit. The second connection terminal of the third resistor unit functions as the second input terminal of the second protection circuit, the third connection terminal of the third resistor unit and the negative terminal of the second diode are connected to function as the first output terminal of the second protection circuit, and the fourth connection terminal of the third resistor unit and the positive terminal of the second diode are connected to function as the second output terminal of the second protection circuit. It can be understood that the second protection circuit is configured to implement overvoltage and overcurrent protection to the third signal control circuit to ensure that the third signal control circuit does not burn out, thereby improving the safety and reliability of the third signal control circuit.

[0018] In a first embodiment, in possible implementations, the control system further includes a first DC contactor and a second DC contactor. The first connection terminal of the first DC contactor is configured to connect to a first charging port of the charging pile, and the second connection terminal of the first DC contactor is configured to connect to the positive terminal of the battery pack. The first connection terminal of the second DC contactor is configured to connect to a second charging port of the charging pile, and the second connection terminal of the second DC contactor is configured to connect to the negative terminal of the battery pack. The vehicle controller is configured to control the first DC contactor and the second DC contactor to close, so that the charging pile charges the electric vehicle, thereby improving the charging efficiency and speed of the electric vehicle. In addition, the control policy of the control system is simplified and the control efficiency of the control system is improved.

[0019] According to a second aspect, the present application provides an integrated controller. The integrated controller includes a control system provided in the first aspect and in any one of the possible implementations of the first aspect. It can be understood that the control system can simultaneously implement the functions of the EVCC and the vehicle controller, and that the EVCC does not need to use a main chip, a power management chip, and a communication chip. Thus, the cost of the integrated controller is reduced and the degree of integration is increased.

[0020] In a second embodiment, in possible implementations, the integrated controller further includes a box, and the charge detection module, charge control module, and vehicle controller are integrated within the box.

[0021] With respect to the second aspect, in possible implementations, the integrated controller further includes a motor control unit, which is integrated within a box.

[0022] According to a third aspect, the present application provides an electric vehicle. The electric vehicle includes a battery pack and an integrated controller provided in either the second aspect or one of the possible implementation forms of the second aspect. It can be understood that the integrated controller can simultaneously perform the functions of the EVCC and the vehicle controller, and that there is no need to use a main chip, a power management chip, and a communication chip in the EVCC. Thus, the cost and power consumption of the electric vehicle can be reduced, the risk of failure of the electric vehicle is reduced, and the reliability of the electric vehicle is improved.

[0023] In this application, the control system can use a vehicle controller to process various signals of the EVCC to achieve control functions, without the need to use the main chip in the EVCC, thereby greatly reducing the system cost and providing strong applicability. In addition, the charging detection module and the charging control module are simplified functional modules obtained after simplifying the analog quantity sampling circuit and the switch quantity control circuit in the EVCC. That is, the simplified functional module of the EVCC is integrated into the control system, and the power management circuit and the communication or protocol conversion circuit in the vehicle controller are used. Therefore, the control system can simultaneously realize the functions of the EVCC and the vehicle controller, resulting in a high degree of integration. Furthermore, there is no need to use the power management chip and the communication chip in the EVCC, thereby further reducing the system cost.

Brief Description of the Drawings

[0024] [Figure 1] It is a schematic diagram of the structure of an electric vehicle according to this application. [Figure 2] It is a schematic diagram of the structure of an integrated controller according to this application. [Figure 3] It is a schematic diagram of another structure of an integrated controller according to this application. [Figure 4] It is a schematic diagram of another structure of an integrated controller according to this application. [Figure 5] It is a schematic diagram of the structure of a control system according to this application. [Figure 6] It is a schematic diagram of the structure of a charging detection module according to this application. [Figure 7] It is a schematic diagram of another structure of a charging detection module according to this application. [Figure 8] It is a schematic diagram of another structure of a charging detection module according to this application. [Figure 9] It is a schematic diagram of another structure of a charging detection module according to this application. [Figure 10] It is a schematic diagram of the structure of a charging control module according to this application. [Figure 11] This is a schematic diagram of another structure of the charging control module according to this application. [Figure 12] This is a schematic diagram of another structure of the charging control module according to this application. [Figure 13] This is a schematic diagram of another structure of the charging control module according to this application. [Figure 14] This is a schematic diagram of another structure of the charging control module according to this application. [Figure 15] This is a schematic diagram of another structure of the charging control module according to this application. [Figure 16] This is a schematic diagram of another structure of the control system according to this application. [Figure 17] This is a schematic circuit diagram of the interface circuit for a charging pile and the interface circuit for an electric vehicle according to this application. [Figure 18] This is a schematic flowchart illustrating how a charging pile is controlled by a control system according to this application to charge a battery pack. [Modes for carrying out the invention]

[0025] The technical solutions in the embodiments of this application will be described clearly and completely below with reference to the accompanying drawings of the embodiments. It will be clear that the embodiments described are not all but a portion of the embodiments of this application. All other embodiments that can be obtained by those skilled in the art without creative effort based on the embodiments of this application are included in the scope of protection of this application.

[0026] The implementation of the technical solution of this application will be described in more detail below with reference to the attached drawings.

[0027] Figure 1 is a schematic diagram of the structure of an electric vehicle according to this application. As shown in Figure 1, the electric vehicle 1 includes a battery pack 10 and an integrated controller 11. The integrated controller 11 is configured to communicate with a charging pile, which in turn charges the battery pack 10. For example, the battery pack 10 may be a power battery inside the electric vehicle 1. It can be understood that the integrated controller 11 can simultaneously perform the functions of EVCC and vehicle controller, eliminating the need to use a main chip, power management chip, and communication chip in the EVCC. Therefore, the cost and power consumption of the electric vehicle 1 can be reduced, the risk of failure of the electric vehicle 1 can be lowered, the reliability of the electric vehicle 1 can be improved, and it can provide strong applicability.

[0028] Figure 2 is a schematic diagram of the structure of the integrated controller according to this application. As shown in Figure 2, the integrated controller 11 includes a control system 2. In this case, the integrated controller 11 and the control system 2 are the same device. The control system 2 can simultaneously implement the functions of the EVCC and the vehicle controller, and it can be understood that there is no need to use a main chip, power management chip, and communication chip in the EVCC. Therefore, the cost of the integrated controller 11 is reduced and the degree of integration is increased.

[0029] Figure 3 is a schematic diagram of another structure of the integrated controller according to this application. As shown in Figure 3, the integrated controller 11 shown in Figure 2 further includes a box 111, and the control system 2 includes a charge detection module 20, a charge control module 21, and a vehicle controller 22. The charge detection module 20, the charge control module 21, and the vehicle controller 22 are integrated within the box 111.

[0030] Figure 4 is a schematic diagram of another structure of the integrated controller according to the present application. As shown in Figure 4, the integrated controller 11 shown in Figure 3 further includes a Motor Control Unit (MCU) 112, which is integrated within a box 111. The Motor Control Unit 112 is configured to receive vehicle drive control commands from the vehicle controller 22 and, based on the vehicle drive control commands, control the motor to output a specified torque and rotational speed to drive and travel the electric vehicle 1.

[0031] The structure and operating principle of the control system provided in this application will be described below using an example with reference to Figures 5 to 18.

[0032] Figure 5 is a schematic diagram of the structure of the control system according to this application. As shown in Figure 5, the control system 2 includes a charge detection module 20, a charge control module 21, and a vehicle controller 22. The first input port 201 of the charge detection module 20 is configured to connect to the first output port 301 of the charge pile 3, the second input port 202 of the charge detection module 20 is configured to connect to the first output port 221 of the vehicle controller 22, and the output port 203 of the charge detection module 20 is configured to connect to the first input port 222 of the vehicle controller 22. The first input port 211 of the charge control module 21 is configured to connect to the second output port 302 of the charge pile 3, the second input port 212 of the charge control module 21 is configured to connect to the third output port 303 of the charge pile 3, the first output port 213 of the charge control module 21 is configured to connect to the second input port 223 of the vehicle controller 22, and the second output port 214 of the charge control module 21 is configured to connect to the third input port 224 of the vehicle controller 22.

[0033] It can be understood that the control system 2 can use the vehicle controller 22 to process various signals from the EVCC and realize control functions, eliminating the need to use the main chip within the EVCC, thereby significantly reducing system costs and providing strong applicability. In addition, the charge detection module 20 and the charge control module 21 are simplified functional modules obtained by simplifying the analog quantity sampling circuit and switch quantity control circuit within the EVCC. That is, the control system 2 integrates the simplified functional modules of the EVCC and uses the power management circuit and communication or protocol conversion circuit within the vehicle controller 22. Therefore, the control system 2 can simultaneously realize the functions of the EVCC and the vehicle controller 22, resulting in a higher degree of integration. Furthermore, the power management chip and communication chip within the EVCC do not need to be used, thereby further reducing system costs.

[0034] In one embodiment, the control system 2 is in sleep mode when the DC charging gun of the charging pile 3 is not inserted into the charging interface of the electric vehicle 1. When the DC charging gun of the charging pile 3 is inserted into the charging interface of the electric vehicle 1 and the low-voltage auxiliary power supply of the charging pile 3 is turned on, the control system 2 is started up and begins operation, thereby significantly reducing the vehicle power consumption of the electric vehicle 1. In this case, the charging detection module 20 is in its normal operating state. The vehicle controller 22 is configured to output a disconnection detection control signal to the charging detection module 20. For example, the disconnection detection control signal may be the Test-DC signal shown in Figure 5.

[0035] When the Test-DC signal is high level, the charge detection module 20 begins detecting the connection status of the DC charging gun. In certain implementations, when the first input port 201 of the charge detection module 20 is connected to the first output port 301 of the charging pile 3, the charging pile 3 is configured to output a first signal to the charge detection module 20. For example, the first signal is the DC-CC signal shown in Figure 5. For example, the first output port 301 may be the Connection Confirmation (CC) port in the DC charging gun of the charging pile 3. For example, the first output port 301 may be the CC2 port. Based on the DC-CC signal, the charge detection module 20 is configured to output a switch amount signal to the vehicle controller 22. For example, the switch amount signal is the Test-DC-Return signal shown in Figure 5. The vehicle controller 22 is configured to determine the connection status of the DC charging gun based on the Test-DC-Return signal. Specifically, the vehicle controller 22 is configured to determine that the DC charging gun is successfully inserted if the Test-DC-Return signal is low level. The vehicle controller 22 is further configured to determine that the DC charging gun is not inserted or has failed to insert if the Test-DC-Return signal is high level.

[0036] In this embodiment, the charge detection module 20 communicates and interacts with the charge pile 3 and the vehicle controller 22 to detect the connection status of the DC charging gun, thereby simplifying the control policy of the control system 2 and improving the control efficiency of the control system 2.

[0037] In one embodiment, when the DC charging gun is successfully inserted, the first input port 211 of the charging control module 21 is connected to the second output port 302 of the charging pile 3. In this case, the charging pile 3 is configured to output an auxiliary power signal to the charging control module 21. For example, the auxiliary power signal is the Charger-DC signal shown in Figure 5. The charging control module 21 is configured to output a charging start confirmation signal to the vehicle controller 22 based on the Charger-DC signal. For example, the charging start confirmation signal is the / Charger1 signal shown in Figure 5. For example, if the Charger-DC signal is high level, the / Charger1 signal is low level.

[0038] The vehicle controller 22 performs CAN communication with the charging pile 3 via the charging subnet. The charging subnet is a subnet of the vehicle CAN network in the electric vehicle 1 and is configured to perform CAN communication with the charging pile 3. The vehicle controller 22 is configured to send a charging detection result to the charging pile 3 indicating that the connection state of the DC charging gun is in the gun insertion successful state when the / Charger1 signal is low level. In this case, the charging detection module 20 enters disconnection detection mode. In disconnection detection mode, the charging pile 3 detects the connection state of the DC charging gun, and if it detects that the connection state of the DC charging gun is in the gun insertion successful state, it sends gun insertion success information to the vehicle controller 22. When the vehicle controller 22 receives the gun insertion success information, it is configured to output a charging permission signal to the charging pile 3. When the charging pile 3 receives the charging permission signal, it is configured to output a second signal to the charging control module 21. For example, the second signal is the Charger-HV signal shown in Figure 5. The charge control module 21 is configured to output a third signal to the vehicle controller 22 based on the Charger-HV signal. For example, the third signal is the / Charger2 signal shown in Figure 5. When the vehicle controller 22 detects that the / Charger2 signal is at a low level, the charge pile 3 starts charging the electric vehicle 1.

[0039] In this embodiment, the charging control module 21 communicates and interacts with the charging pile 3 and the vehicle controller 22, and as a result the charging pile 3 charges the electric vehicle 1, thereby simplifying the control policy of the control system 2 and improving the control efficiency of the control system 2 and the charging efficiency of the electric vehicle 1.

[0040] Figure 6 is a schematic diagram of the structure of the charge detection module according to this application. As shown in Figure 6, the charge detection module 20 shown in Figure 5 includes a disconnection detection circuit 204, a first signal control circuit 205, and a gun connection identification circuit 206. The input terminal 41 of the disconnection detection circuit 204 is connected to the second input port 202 of the charge detection module 20, the output terminal 42 of the disconnection detection circuit 204 is connected to the input terminal 51 of the first signal control circuit 205, the output terminal 52 of the first signal control circuit 205 is connected to the first input port 201 of the charge detection module 20 and the input terminal 61 of the gun connection identification circuit 206, and the output terminal 62 of the gun connection identification circuit 206 is connected to the output port 203 of the charge detection module 20.

[0041] The first signal control circuit 205 includes a first switch Q1 and a first resistor unit 2051. For example, the first switch Q1 is a single-pole double-throw switch or relay. The first connection terminal Q11 of the first switch Q1 functions as an input terminal to the first signal control circuit 205, i.e., the first connection terminal Q11 of the first switch Q1 is connected to the output terminal 42 of the disconnection detection circuit 204. The second connection terminal Q12 and the third connection terminal Q13 of the first switch Q1 are configured to connect to a first power supply S1, the fourth connection terminal Q14 of the first switch Q1 is connected to the first connection terminal 511 of the first resistor unit 2051, and the second connection terminal 512 of the first resistor unit 2051 functions as an output terminal to the first signal control circuit 205. The fifth connection terminal Q15 of the first switch Q1 is suspended.

[0042] When the DC charging gun of the charging pile 3 is inserted into the charging interface of the electric vehicle 1, the vehicle controller 22 is configured to output a high-level Test-DC signal to the disconnection detection circuit 204. In this case, the disconnection detection circuit 204 does not activate, the charging detection module 20 does not enter disconnection detection mode, and the third connection terminal Q13 of the first switch Q1 is in contact with the fourth connection terminal Q14 of the first switch Q1, i.e., the first switch Q1 is not conducting or is turned off. The gun connection identification circuit 206 starts detecting the connection status of the DC charging gun. Specifically, the gun connection identification circuit 206 is configured to output a Test-DC-Return signal based on the DC-CC signal, and the Test-DC-Return signal is used to indicate the connection status of the DC charging gun. If the Test-DC-Return signal is low level, the connection status of the DC charging gun is a successful gun insertion state. If the Test-DC-Return signal is high level, the connection status of the DC charging gun is a gun not inserted state or a gun insertion failure state. After the gun connection identification circuit 206 detects the connection status of the DC charging gun, the vehicle controller 22 is configured to output a low-level Test-DC signal to the disconnection detection circuit 204. In this case, the disconnection detection circuit 204 operates normally, the charging detection module 20 enters disconnection detection mode, and as a result, the charging pile 3 detects the connection status of the DC charging gun. In addition, the third connection terminal Q13 of the first switch Q1 contacts the fifth connection terminal Q15 of the first switch Q1, i.e., the first switch Q1 becomes conductive, preventing current from flowing to the charging pile 3, thereby improving the detection efficiency of the charging pile 3 in detecting the connection status of the DC charging gun.

[0043] The charge detection module 20 has the function of detecting the connection status of the DC charging gun and the function of entering a disconnection detection mode so that the charging pile 3 can detect the connection status of the DC charging gun. This simplifies the control policy of the control system 2 and improves the control efficiency of the control system 2.

[0044] In one embodiment, the first resistor unit 2051 may include one or more resistors. If the first resistor unit 2051 includes multiple resistors, the multiple resistors may be connected in series, in parallel, or in series-parallel.

[0045] Figure 7 is a schematic diagram of another structure of the charge detection module according to the present application. As shown in Figure 7, the disconnection detection circuit 204 shown in Figure 6 includes a second switch Q2, a third switch Q3, a first resistor R1, and a second resistor R2. The first connection terminal Q21 of the second switch Q2 functions as an input terminal of the disconnection detection circuit 204, i.e., the first connection terminal Q21 of the second switch Q2 is connected to the second input port 202 of the charge detection module 20 to receive a Test-DC signal. The second connection terminal Q22 of the second switch Q2 is connected to the first connection terminal R101 of the first resistor R1 and the first connection terminal R201 of the second resistor R2, the second connection terminal R102 of the first resistor R1 is configured to be connected to the second power supply S2, the second connection terminal R202 of the second resistor R2 is connected to the first connection terminal Q31 of the third switch Q3, the second connection terminal Q32 of the third switch Q3 functions as the output terminal of the disconnection detection circuit 204, and the third connection terminal Q23 of the second switch Q2 and the third connection terminal Q33 of the third switch Q3 are grounded.

[0046] When the Test-DC signal is high level, the second switch Q2 is saturated on and the third switch Q3 is closed, resulting in the third terminal Q13 of the first switch Q1 contacting the fourth terminal Q14 of the first switch Q1, i.e., the first switch Q1 is not conducting or is turned off. When the Test-DC signal is low level, the second switch Q2 is closed and the third switch Q3 is saturated on, resulting in the third terminal Q13 of the first switch Q1 contacting the fifth terminal Q15 of the first switch Q1, i.e., the first switch Q1 is conducting. It can be seen that the Test-DC signal is used to control the on / off state of the second switch Q2 and the third switch Q3, and the on / off state of the second switch Q2 and the third switch Q3 is used to control whether the first switch Q1 is conducting or turned off. Therefore, the Test-DC signal may be used to control whether the first switch Q1 is conducted or turned off, as a result of the charge detection module 20 entering disconnection detection mode, enabling the charge pile 3 to detect the connection status of the DC charging gun, or the gun connection identification circuit 206 to detect the connection status of the DC charging gun.

[0047] As shown in Figure 7, the Gunn connection identification circuit 206 shown in Figure 6 includes a comparator IC1A. The inverting input terminal IC1A1 of the comparator IC1A functions as an input terminal of the Gunn connection identification circuit 206 to receive the DC-CC signal, the non-inverting input terminal IC1A2 of the comparator IC1A is connected to a reference voltage Vref, and the output terminal IC1A3 of the comparator IC1A functions as an output terminal of the Gunn connection identification circuit 206. The reference voltage Vref may be provided by an external power supply or by a power supply circuit inside the Gunn connection identification circuit 206. For example, the reference voltage Vref is 6V or another voltage value.

[0048] When the third connection terminal Q13 of the first switch Q1 contacts the fourth connection terminal Q14 of the first switch Q1, the series voltage between the first resistor unit 2051 and the pull-down resistor is pulled up to a first voltage, that is, the pull-up voltage inside the control system 2 is pulled up to a first voltage. The first voltage is the same as the pull-up voltage inside the charging pile 3. The pull-down resistor is a pull-down resistor to ground inside the charging pile 3. For example, the resistance value of the pull-down resistor is 1 kΩ or another resistance value. For example, the first voltage may be 12V or another voltage value. In this case, the voltage of the DC-CC signal is pulled up to the first voltage via the first resistor unit 2051, and the first resistor unit 2051 and the pull-down resistor constitute a voltage divider circuit. Therefore, the DC-CC signal voltage is divided from the first voltage to a second voltage, and the second voltage is the divided voltage value corresponding to the pull-down resistor. The second voltage is output to the inverting input terminal IC1A1 of comparator IC1A. Comparator IC1A is configured to output a low-level Test-DC-Return signal if the second voltage is less than the reference voltage Vref. In this case, the connection state of the DC charging gun is the gun insertion successful state. Comparator IC1A is further configured to output a high-level Test-DC-Return signal if the second voltage is greater than the reference voltage Vref. In this case, the connection state of the DC charging gun is the gun not inserted state.

[0049] Comparator IC1A can detect the connection status of the DC charging gun based on the comparison result between the second voltage and the reference voltage Vref, thereby simplifying the control policy of control system 2 and improving the control efficiency of control system 2.

[0050] In one embodiment, the second switch Q2 or the third switch Q3 is one of the following: a transistor, a metal-oxide-semiconductor field-effect transistor (MOSFET), or an insulated gate bipolar transistor (IGBT), where the metal-oxide-semiconductor field-effect transistor is sometimes abbreviated as a MOS transistor. For example, the second switch Q2 may be an NPN transistor, and the third switch Q3 may be an NMOS transistor.

[0051] Figure 8 is a schematic diagram of another structure of the charge detection module according to the present application. As shown in Figure 8, the charge detection module 20 shown in Figure 7 further includes a third protection circuit 207, the third protection circuit 207 including a third transient suppression diode TVS3, a fifth resistor R3, and a diode unit 2071. The first connection terminal T301 of the third transient suppression diode TVS3 functions as an input terminal to the third protection circuit 207, the first connection terminal T301 of the third transient suppression diode TVS3 is connected to the first connection terminal R301 of the fifth resistor R3, and the second connection terminal T302 of the third transient suppression diode TVS3 is grounded. The second connection terminal R302 of the fifth resistor R3 and the first connection terminal 711 of the diode unit 2071 are connected to function as output terminals of the third protection circuit 207, the second connection terminal 712 of the diode unit 2071 is connected to the fifth power supply S5, and the third connection terminal 713 of the diode unit 2071 is grounded.

[0052] In the third protection circuit 207, the third transient suppression diode TVS3 is configured to clamp the DC-CC signal voltage to a predetermined voltage value if the DC-CC signal voltage is overvoltage or negative voltage, thereby preventing damage to the comparator IC1A. The fifth resistor R3 is a current limiting resistor. For example, the resistance value of the fifth resistor R3 is 100kΩ or more. The fifth resistor R3 is configured to limit the DC-CC signal current if the DC-CC signal current is overcurrent, thereby preventing damage to the comparator IC1A. The diode unit 2071 is configured to clamp the DC-CC signal voltage to a predetermined voltage value if the DC-CC signal voltage is overvoltage or negative voltage, thereby preventing damage to the comparator IC1A. The third protection circuit 207 may implement overvoltage and overcurrent protection for comparator IC1A to prevent damage to comparator IC1A, thereby allowing the Gunn connection identification circuit 206 to operate normally and thereby improving the safety and reliability of comparator IC1A.

[0053] In one embodiment, the diode unit 2071 may include one or more diodes. If the diode unit 2071 includes multiple diodes, the multiple diodes may be connected in series, in parallel, or in series-parallel.

[0054] Figure 9 is a schematic diagram of another structure of the charge detection module according to the present application. As shown in Figure 9, the second connection terminal of resistor R1 is configured to connect to a second power supply S2. For example, the second power supply S2 is power supply VCC2 shown in Figure 9, and the voltage of power supply VCC2 may be +5V or another voltage value. The disconnection detection circuit 204 shown in Figure 8 further includes resistor R4, resistor R5, capacitor C1, a first transient suppression diode TVS1, and capacitor C2. The first connection terminals of resistor R4 and resistor R5 are connected to function as input terminals of the disconnection detection circuit 204, and the second connection terminal of resistor R4 is connected to the first connection terminal of capacitor C1 and the first connection terminal Q21 of the second switch Q2. The second connection terminal of resistor R5 is configured to connect to power supply VCC4. For example, the voltage of power supply VCC4 may be +3.3V or another voltage value. The first transient suppression diode TVS1 is connected between the first connection terminal Q31 and the third connection terminal Q33 of the third switch Q3, and the second connection terminal Q32 of the third switch Q3 and the first connection terminal of capacitor C2 are connected to function as output terminals of the disconnection detection circuit 204. The second connection terminals of capacitor C1 and capacitor C2 are grounded.

[0055] Resistors R4 and R5 may constitute a voltage divider circuit, which is configured to divide the voltage of the Test-DC signal to obtain divided voltages. The divided voltages are filtered by capacitor C1 and then output to a second switch Q2, which controls the on / off state of the second switch Q2 to switch between a saturated on state and an off state. A first transient suppression diode TVS1 is configured to prevent damage to the third switch Q3, thereby improving the safety and reliability of the third switch Q3. Capacitor C2 is configured to filter the output signal of the third switch Q3 to obtain a filtered signal and output the filtered signal to the first switch Q1, which controls whether the first switch Q1 is conducted or turned off.

[0056] As shown in Figure 9, in one embodiment, the first resistor unit 2051 shown in Figure 8 includes resistors R6 and R7, which are connected in parallel. For example, the resistance values ​​of resistors R6 and R7 are 2 kΩ or another value, respectively. The parallel branch formed by resistors R6 and R7 can divide the output current of the first switch Q1 to prevent the power of resistors R6 and R7 from becoming excessive and burning out the first switch Q1. The first signal control circuit 205 shown in Figure 5 further includes a Zener diode DZ1 and a diode D1, which are connected in series between a first connection terminal Q11 and a second connection terminal Q12 of the first switch Q1. The series branch formed by the Zener diode DZ1 and diode D1 is configured to clamp the filtered signal voltage to a predetermined voltage value if the filtered signal voltage is overvoltage or negative, thereby preventing damage to the first switch Q1 and improving the safety and reliability of the first switch Q1. The third connection terminal Q13 of the first switch Q1 is configured to connect to a first power supply S1. For example, the first power supply S1 is power supply VCC1 shown in Figure 9, and the voltage of power supply VCC1 may be +12V or another voltage value.

[0057] As shown in Figure 9, in one embodiment, a test point CZ1 is provided between the first signal control circuit 205 and the third protection circuit 207. The second connection terminal 712 of the diode unit 2071 shown in Figure 8 is configured to connect to a fifth power supply S5. For example, the fifth power supply S5 is power supply VCC3 shown in Figure 9, and the voltage of power supply VCC3 may be +12V or another voltage value. The diode unit 2071 includes diodes D2 and D3 connected in series, and diodes D2 and D3 may form a three-terminal Zener diode. The three-terminal Zener diode is configured to clamp the DC-CC signal voltage to a predetermined voltage value if the DC-CC signal voltage is overvoltage or negative voltage, thereby preventing damage to the comparator IC1A, and as a result, the Gunn connection identification circuit 206 operates normally. The third protection circuit 207 in Figure 8 further includes capacitors C3 and C4. Capacitor C3 is connected in parallel with the third transient suppression diode TVS3, the first terminal of capacitor C4 is connected to the second terminal R302 of the fifth resistor R3, and the second terminal of capacitor C4 is grounded.

[0058] As shown in Figure 9, in one embodiment, the Gunn connection identification circuit 206 shown in Figure 8 further includes resistors R8 and R9, capacitors C5 and C6, resistors R10 and R11, and capacitor C7. Resistors R8 and R9 are connected in series between the power supply VCC5 and reference ground. For example, the voltage of the power supply VCC5 may be +12V or another voltage value. Capacitor C5 is connected in parallel with resistor R9. Resistors R8, R9, and capacitor C5 may also form a power supply circuit, which is configured to provide a reference voltage Vref to comparator IC1A. Comparator IC1A is configured to connect to the power supply VCC6 and reference ground. For example, the voltage of the power supply VCC6 may be +12V or another voltage value. Comparator IC1A is grounded via capacitor C6. The output terminal IC1A3 of comparator IC1A is connected to the first connection terminal of resistor R10 and the first connection terminal of resistor R11, and the second connection terminal of resistor R10 is configured to be connected to the power supply VCC7. For example, the voltage of power supply VCC7 may be +3.3V or another voltage value. The second connection terminal of resistor R11 and the first connection terminal of capacitor C7 are connected to function as the output terminals of Gunn connection identification circuit 206, and the second connection terminal of capacitor C7 is grounded.

[0059] Figure 10 is a schematic diagram of the structure of the charge control module according to this application. As shown in Figure 10, the charge control module 21 shown in Figure 5 includes a first protection circuit 215 and a second signal control circuit 216. The input terminal 151 of the first protection circuit 215 is connected to a first input port 211 of the charge control module 21, the first output terminal 152 of the first protection circuit 215 is connected to an input terminal 161 of the second signal control circuit 216, and the output terminal 162 of the second signal control circuit 216 is connected to a first output port 213 of the charge control module 21. It can be understood that the first protection circuit 215 is configured to clamp the voltage of the Charger-DC signal to provide overvoltage protection to the second signal control circuit 216 and to limit the current of the Charger-DC signal to provide overcurrent protection to the second signal control circuit 216. The first protection circuit 215 is configured to implement overvoltage and overcurrent protection for the second signal control circuit 216 to ensure that the second signal control circuit 216 does not burn out, thereby improving the safety and reliability of the second signal control circuit 216. When the Charger-DC signal is high level, the second signal control circuit 216 is configured to output a low-level / Charger1 signal to the vehicle controller 22, and as a result, the vehicle controller 22 performs CAN communication with the charging pile 3 by using the charging subnet.

[0060] As shown in Figure 10, in one embodiment, the charge control module 21 shown in Figure 5 further includes a second protection circuit 217 and a third signal control circuit 218. The first input terminal 171 of the second protection circuit 217 is connected to the second input port 212 of the charge control module 21, the second input terminal 172 of the second protection circuit 217 is connected to the second output terminal 153 of the first protection circuit 215, the first output terminal 173 of the second protection circuit 217 is connected to the first input terminal 181 of the third signal control circuit 218, the second output terminal 174 of the second protection circuit 217 is connected to the second input terminal 182 of the third signal control circuit 218, and the output terminal 183 of the third signal control circuit 218 is connected to the second output port 214 of the charge control module 21. It can be understood that the second protection circuit 217 is configured to clamp the voltage of the Charger-HV signal to provide overvoltage protection to the third signal control circuit 218, and to limit the current of the Charger-HV signal to provide overcurrent protection to the third signal control circuit 218. It can be understood that the second protection circuit 217 is configured to provide overvoltage and overcurrent protection to the third signal control circuit 218 to ensure that the third signal control circuit 218 does not burn out, thereby improving the safety and reliability of the third signal control circuit 218. When the Charger-HV signal is low level, the third signal control circuit 218 is configured to output a low-level / Charger2 signal to the vehicle controller 22, and as a result the charging pile 3 starts charging the electric vehicle 1.

[0061] Figure 11 is a schematic diagram of another structure of the charge control module according to the present application. As shown in Figure 11, the first protection circuit 215 shown in Figure 10 includes a first transient suppression diode TVS1, a second resistor unit 2150, a capacitor C8, and a first diode D4. The first connection terminal T101 of the first transient suppression diode TVS1 functions as an input terminal to the first protection circuit 215, the first connection terminal T101 of the first transient suppression diode TVS1 is connected to the first connection terminal 501 of the second resistor unit 2150, the first connection terminal 501 of the second resistor unit 2150 functions as a second output terminal to the first protection circuit 215, and the second connection terminal T102 of the first transient suppression diode TVS1 is grounded. The second connection terminal 502 of the second resistor unit 2150, the first connection terminal C81 of the capacitor C8, and the negative terminal D41 of the first diode D4 are connected to function as the first output terminal of the first protection circuit 215, while the third connection terminal 503 of the second resistor unit 2150, the second connection terminal C82 of the capacitor C8, and the positive terminal D42 of the first diode D4 are grounded.

[0062] It can be understood that the first transient suppression diode TVS1 is configured to clamp the voltage of the Charger-DC signal to a predetermined voltage value if the voltage of the Charger-DC signal is overvoltage or negative, thereby providing overvoltage protection to the second signal control circuit 216. The second resistor unit 2150 is configured to limit the current of the Charger-DC signal if the current of the Charger-DC signal is overcurrent, thereby providing overcurrent protection to the second signal control circuit 216. Capacitor C8 is configured to filter the output signal of the second resistor unit 2150 to obtain a filtered signal. The first diode D4 is configured to clamp the voltage of the filtered signal to a predetermined voltage value and output an electrical signal to the second signal control circuit 216 if the voltage of the filtered signal is overvoltage or negative, thereby providing overvoltage protection to the second signal control circuit 216.

[0063] In one embodiment, the second resistor unit 2150 may include one or more resistors. If the second resistor unit 2150 includes multiple resistors, the multiple resistors may be connected in series, in parallel, or in series-parallel.

[0064] Figure 12 is a schematic diagram of another structure of the charge control module according to the present application. As shown in Figure 12, the second signal control circuit 216 shown in Figure 11 includes a first photocoupler PC1 and a third resistor R12. The first connection terminal A1 of the first photocoupler PC1 functions as an input terminal of the second signal control circuit 216, the second connection terminal A2 and the third connection terminal A3 of the first photocoupler PC1 are connected to the first connection terminal R121 of the third resistor R12, the first connection terminal R121 of the third resistor R12 functions as an output terminal of the second signal control circuit 216, the second connection terminal R122 of the third resistor R12 is configured to connect to a third power supply S3, and the fourth connection terminal A4 and the fifth connection terminal A5 of the first photocoupler PC1 are grounded. When the Charger-DC signal is high level, it can be understood that after the first photocoupler PC1 receives the electrical signal output by the first diode D4, the primary side light-emitting element of the first photocoupler PC1 forms a loop to ground. In this case, the first photocoupler PC1 is turned on and configured to output a low-level / Charger1 signal to the vehicle controller 22, so that the vehicle controller 22 performs CAN communication with the charging pile 3 by using the charging subnet, performs signal isolation between the first protection circuit 215 and the first output port 213, thereby increasing the response speed and interference immunity of the second signal control circuit 216 and providing stronger applicability.

[0065] Figure 13 is a schematic diagram of another structure of the charge control module according to the present application. As shown in Figure 13, the second protection circuit 217 shown in Figure 12 includes a second transient suppression diode TVS2, a third resistor unit 2170, and a second diode D5. The first connection terminal T201 of the second transient suppression diode TVS2 functions as the first input terminal of the second protection circuit 217, and the first connection terminal T201 of the second transient suppression diode TVS2 is connected to the first connection terminal 701 of the third resistor unit 2170. The second connection terminal 702 of the third resistor unit 2170 functions as the second input terminal of the second protection circuit 217. The third connection terminal 703 of the third resistor unit 2170 and the negative terminal D51 of the second diode D5 are connected to function as the first output terminal of the second protection circuit 217, and the fourth connection terminal 704 of the third resistor unit 2170 and the positive terminal D52 of the second diode D5 are connected to function as the second output terminal of the second protection circuit 217.

[0066] It can be understood that the second transient suppression diode TVS2 is configured to clamp the voltage of the Charger-HV signal to a predetermined voltage value if the voltage of the Charger-HV signal is overvoltage or the voltage of the Charger-DC signal is negative, thereby providing overvoltage protection to the third signal control circuit 218. The third resistor unit 2170 is configured to limit the current of the Charger-HV signal if the current of the Charger-HV signal is overcurrent, thereby providing overcurrent protection to the third signal control circuit 218. The second diode D5 is configured to clamp the voltage of the output signal of the third resistor unit 2170 to a predetermined voltage value and output an electrical signal to the third signal control circuit 218 if the voltage of the output signal is overvoltage or the voltage of the output signal is negative, thereby providing overvoltage protection to the third signal control circuit 218.

[0067] In one embodiment, the third resistor unit 2170 may include one or more resistors. If the third resistor unit 2170 includes multiple resistors, the multiple resistors may be connected in series, in parallel, or in series-parallel.

[0068] Figure 14 is a schematic diagram of another structure of the charge control module according to this application. As shown in Figure 14, the third signal control circuit 218 shown in Figure 13 includes a second photocoupler PC2 and a fourth resistor R13. The first connection terminal B1 of the second photocoupler PC2 functions as the first input terminal of the third signal control circuit 218, the second connection terminal B2 of the second photocoupler PC2 functions as the second input terminal of the third signal control circuit 218, the third connection terminal B3 and the fourth connection terminal B4 of the second photocoupler PC2 are connected to the first connection terminal R131 of the fourth resistor R13, the first connection terminal R131 of the fourth resistor R13 functions as the output terminal of the third signal control circuit 218, the second connection terminal R132 of the fourth resistor R13 is configured to connect to the fourth power supply S4, and the fifth connection terminal B5 of the second photocoupler PC2 is grounded.

[0069] It can be understood that if the Charger-DC signal is at a high level and the Charger-HV signal is at a low level, a potential difference will occur between the Charger-DC signal and the Charger-HV signal. Therefore, after receiving the electrical signal output by the second diode D5, the second photocoupler PC2 is in the ON state and outputs a low-level / Charger2 signal to the vehicle controller 22, as a result the charging pile 3 starts charging the electric vehicle 1, and signal isolation is performed between the second protection circuit 217 and the second output port 214, thereby increasing the response speed and interference immunity of the third signal control circuit 218 and providing stronger applicability.

[0070] Figure 15 is a schematic diagram of another structure of the charge control module according to the present application. As shown in Figure 15, the second resistor unit 2150 shown in Figure 14 includes resistors R14, R15, and R16. The first connection terminals of resistor R14 and resistor R15 are connected to the first connection terminal T101 of the first transient suppression diode TVS1, the second connection terminal of resistor R15 is connected to the first connection terminal of resistor R16, the second connection terminal of resistor R16 is connected to the first connection terminal C81 of capacitor C8, and the second connection terminal of resistor R14 is connected to the second connection terminal C82 of capacitor C8. The second signal control circuit 216 shown in Figure 11 further includes resistor R17 and capacitor C9. The first terminal of resistor R17 is connected to the first terminal R121 of the third resistor R12, and the second terminal R122 of the third resistor R12 is configured to be connected to the third power supply S3. For example, the third power supply S3 is power supply VCC8 shown in Figure 12, and the voltage of power supply VCC8 may be +3.3V or another voltage value. The second terminal of resistor R17 and the first terminal of capacitor C9 are connected to function as output terminals of the second signal control circuit 216, and the second terminal of capacitor C9 is grounded.

[0071] As shown in Figure 15, the third resistor unit 2170 shown in Figure 14 includes resistors R18, R19, and R20. The first connection terminals of resistor R18 and R20 are connected to the first connection terminal T201 of the second transient suppression diode TVS2, the second connection terminal of resistor R20 is connected to the first connection terminal T101 of the first transient suppression diode TVS1 and the negative terminal D51 of the second diode D5, and the second connection terminal of resistor R18 is connected to the positive terminal D52 of the second diode D5 via resistor R19. The second protection circuit 217 shown in Figure 15 further includes capacitor C10. The first connection terminal of capacitor C10 is connected to the positive terminal D52 of the second diode D5 and the fourth connection terminal B4 of the second photocoupler PC2, and the second connection terminal of capacitor C10 is grounded. Optionally, the positive terminal D52 of the second diode D5 may also be grounded.

[0072] As shown in Figure 15, the third signal control circuit 218 shown in Figure 14 further includes a resistor R21 and a capacitor C11. The first connection terminal of resistor R21 is connected to the first connection terminal R131 of a fourth resistor R13, and the second connection terminal R132 of the fourth resistor R13 is configured to be connected to a fourth power supply S4. For example, the fourth power supply S4 is the power supply VCC9 shown in Figure 12, and the voltage of power supply VCC9 may be +3.3V or another voltage value. The second connection terminal of resistor R21 and the first connection terminal of capacitor C11 are connected to function as output terminals of the third signal control circuit 218, and the second connection terminal of capacitor C11 is grounded.

[0073] In one embodiment, the circuit topology shown in Figures 6 to 15 shows that both the charge detection module 20 and the charge control module 21 perform their corresponding functions by using low-power consumption electronic components, thereby effectively reducing the vehicle power consumption of the electric vehicle 1.

[0074] Figure 16 is a schematic diagram of another structure of the control system according to the present application. As shown in Figure 16, the control system 2 shown in Figure 5 further includes a first DC contactor 23 and a second DC contactor 24. The first connection terminal 2301 of the first DC contactor 23 is configured to connect to a first charging port of the charging pile 3, and the second connection terminal 2302 of the first DC contactor 23 is configured to connect to the positive terminal of the battery pack 10. The first connection terminal 2401 of the second DC contactor 24 is configured to connect to a second charging port of the charging pile 3, and the second connection terminal 2402 of the second DC contactor 24 is configured to connect to the negative terminal of the battery pack 10. The first charging port may also be the positive (DC+) port of the DC power supply of the charging pile 3, and the positive port of the DC power supply is the port from which the positive line of the DC power supply is drawn. The second charging port may be the negative (DC-) port of the DC power supply of the charging pile 3, and the negative port of the DC power supply is the port from which the negative line of the DC power supply is drawn.

[0075] The vehicle controller 22 receives the / Charger2 signal output by the charge control module 21 and, upon detecting that the / Charger2 signal is at a low level, is configured to control the first DC contactor 23 and the second DC contactor 24 to close. As a result, the charging pile 3 charges the electric vehicle 1, thereby improving charging efficiency and accelerating the charging speed of the electric vehicle 1.

[0076] In one embodiment, the control system 2 may simplify and integrate the functions of the EVCC on the control board of the control system 2 without placing a separate EVCC within the electric vehicle 1, while the CHAdeMO (Charge de Move) protocol is satisfied, thereby reducing the cost and power consumption of the electric vehicle 1, lowering the risk of failure of the electric vehicle 1, improving the reliability of the electric vehicle 1, and resulting in a higher degree of integration. In the CHAdeMO protocol, the interface circuits of the charging pile 3 and the electric vehicle 1 are shown in Figure 17. Figure 17 is a schematic circuit diagram of the interface circuit of the charging pile and the interface circuit of the electric vehicle according to this application.

[0077] Figure 18 is a schematic flowchart of the present invention relating to a control system that controls a charging pile to charge a battery pack. As shown in Figure 18, the method includes the following steps S10 to S31.

[0078] Step S10: Insert the DC charging gun of the charging pile 3 into the charging interface of the electric vehicle 1.

[0079] Step S11: Turn on switch d1 of the charging pile 3 and output a Charger-DC signal to the control system 2.

[0080] In a specific implementation, switch d1 of the charging pile 3 may be switch d1 in Figure 17, and switch d1 is configured to control the on and off of the auxiliary power supply (charger DC12V, etc.) in Figure 17. When switch d1 is turned off, the auxiliary power supply (charger DC12V, etc.) is turned off. When switch d1 is turned on, the auxiliary power supply (charger DC12V, etc.) is turned on. The auxiliary power supply (charger DC12V, etc.) functions as the startup source and charging determination signal for the control system 2. When the auxiliary power supply (charger DC12V, etc.) is turned on, the charging pile 3 outputs a Charger-DC signal to the control system 2 by using the charging subnet.

[0081] Step S12: Control system 2 is activated and begins operation.

[0082] Step S13: The vehicle controller 22 outputs a high-level Test-DC signal to the charge detection module 20.

[0083] Step S14: The charge detection module 20 outputs a Test-DC-Return signal to the vehicle controller 22.

[0084] In a specific implementation, the charge detection module 20 receives a Test-DC signal and outputs a Test-DC-Return signal to the vehicle controller 22 based on the Test-DC signal. For a specific implementation of step S14, it may be understood that the embodiments corresponding to Figures 6 to 9 are to be seen. Further details are not described herein.

[0085] Step S15: The charging control module 21 outputs a / Charger1 signal to the vehicle controller 22.

[0086] In a specific implementation, the charge control module 21 receives a Charger-DC signal and outputs a / Charger1 signal to the vehicle controller 22 based on the Charger-DC signal. For a specific implementation of step S15, it may be understood that the embodiments corresponding to Figures 11 and 12 are to be seen. Further details are not described herein.

[0087] Step S16: The vehicle controller 22 performs signal processing.

[0088] In a specific implementation, the vehicle controller 22 receives the Test-DC-Return signal and the / Charger1 signal and performs signal processing.

[0089] Step S17: Determine whether the Test-DC-Return signal is at a low level.

[0090] Step S18: The vehicle controller 22 determines that the connection status of the DC charging gun is in the state of successful gun insertion.

[0091] In a specific implementation, if the Test-DC-Return signal is low, the vehicle controller 22 determines that the DC charging gun is successfully inserted. On the other hand, if the Test-DC-Return signal is high, the vehicle controller 22 determines that the DC charging gun is not inserted. In this case, step S31 is executed.

[0092] Step S19: Determine whether the / Charger1 signal is at a low level.

[0093] Step S20: The vehicle controller 22 performs CAN communication with the charging pile 3.

[0094] In a specific implementation, if the / Charger1 signal is low level, the vehicle controller 22 performs CAN communication with the charging pile 3 by using the charging network. On the other hand, if the / Charger1 signal is high level, the vehicle controller 22 performs step S31.

[0095] Step S21: The vehicle controller 22 transmits a charging detection result to the charging pile 3 indicating that the DC charging gun is in a state of successful gun insertion.

[0096] Step S22: The vehicle controller 22 outputs a low-level Test-DC signal to the charge detection module 20. In this case, the vehicle controller 22 controls the charge detection module 20 to enter disconnection detection mode, i.e., the charge detection module 20 stops detecting the connection status of the DC charging gun, preventing the charge detection module 20 from affecting the charging pile 3 when the charging pile 3 performs gun connection detection, thereby improving the accuracy of the gun connection detection performed by the charging pile 3.

[0097] Step S23: The charging pile 3 detects the connection status of the DC charging gun.

[0098] Step S24: The charging pile 3 transmits gun insertion success information to the vehicle controller 22.

[0099] Step S25: The vehicle controller 22 sends a charge permission signal to the charge pile 3.

[0100] Step S26: The charging pile 3 outputs a Charger-HV signal to the charging control module 21.

[0101] In a specific implementation, the charging pile 3 receives a charging permission signal, controls switch k in Figure 17 to turn on, and outputs a Charger-HV signal to the charging control module 21.

[0102] Step S27: The charging control module 21 outputs a / Charger2 signal to the vehicle controller 22.

[0103] In a specific implementation, the charge control module 21 receives the Charger-HV signal and outputs a / Charger2 signal to the vehicle controller 22 based on the Charger-HV signal. For a specific implementation of step S27, it may be understood that the embodiments corresponding to Figures 13 to 15 are to be seen. Further details are not described herein.

[0104] Step S28: Determine whether the / Charger2 signal is at a low level.

[0105] Step S29: The vehicle controller 22 controls the first DC contactor 23 and the second DC contactor 24 to close.

[0106] In a specific implementation, the vehicle controller 22 receives the / Charger2 signal and controls the first DC contactor 23 and the second DC contactor 24 to close if the / Charger2 signal is low level. When switch k in Figure 17 is turned on and the first DC contactor 23 and the second DC contactor 24 are closed, the charge detection module 20 enters disconnection detection mode. In this case, the charge pile 3 detects the connection status of the DC charging gun. To prevent accidental current flow to the charge pile 3, the lateral circuit of the electric vehicle 1 may not be connected to the proximity detection line of the connector.

[0107] Step S30: Charging pile 3 begins charging battery pack 10.

[0108] Step S31: Battery pack 10 fails to charge, and the charging procedure is terminated.

[0109] For specific implementations, please refer to the embodiments corresponding to Figures 5 to 15 for the specific implementations of steps S10 to S31. Further details are not provided in this specification.

[0110] If the control system 2 is integrated into the control board of the integrated controller 11, it can be understood that the control system 2 in the embodiments corresponding to Figures 5 to 18 may also be replaced with the integrated controller 11 for illustrative purposes. Further details are not described herein.

[0111] It should be noted that the terms “first” and “second” used herein are for illustrative purposes only and should not be understood as indicating or implying relative importance. The examples corresponding to Figures 5 through 15 are used solely to illustrate embodiments of this application and should not be understood as constituting any limitation. In an optional manner, Figures 5 through 15 may be implemented in a different manner as an alternative; for example, the resistor R17 and capacitor C9 in Figure 15 may be located outside the second signal control circuit 216. Examples are not listed herein.

[0112] The foregoing disclosures are merely preferred embodiments of the present application and are not intended to limit the scope of the claims of the present application. Accordingly, equivalent modifications made in accordance with the claims of the present application remain within the scope covered by the present application.

Claims

1. Vehicle controller (22) and A charge detection module (20) is configured such that a first input port (201) of the charge detection module (20) is connected to a first output port (301) of the charge pile (3), a second input port (202) of the charge detection module (20) is connected to a first output port (221) of the vehicle controller (22), and an output port (203) of the charge detection module (20) is connected to a first input port (222) of the vehicle controller (22). A charging control module (21) is configured such that a first input port (211) of the charging control module (21) is connected to a second output port (302) of the charging pile (3), a second input port (212) of the charging control module (21) is connected to a third output port (303) of the charging pile (3), a first output port (213) of the charging control module (21) is connected to a second input port (223) of the vehicle controller (22), and a second output port (214) of the charging control module (21) is connected to a third input port (224) of the vehicle controller (22). A control system (2) comprising:

2. The charge detection module (20) comprises a disconnection detection circuit (204), a first signal control circuit (205), and a gun connection identification circuit (206). The control system (2) according to claim 1, wherein the input terminal (41) of the disconnection detection circuit (204) is connected to the second input port (202) of the charge detection module (20), the output terminal (42) of the disconnection detection circuit (204) is connected to the input terminal (51) of the first signal control circuit (205), the output terminal (52) of the first signal control circuit (205) is connected to the first input port (201) of the charge detection module (20) and the input terminal (61) of the gun connection identification circuit (206), and the output terminal (62) of the gun connection identification circuit (206) is connected to the output port (203) of the charge detection module (20).

3. Control system (2) according to claim 2, wherein the first signal control circuit (205) comprises a first switch (Q1) and a first resistor unit (2051), the first connection terminal (Q11) of the first switch (Q1) functions as the input terminal (51) of the first signal control circuit (205), the second connection terminal (Q12) and the third connection terminal (Q13) of the first switch (Q1) are configured to be connected to a first power supply (S1), the fourth connection terminal (Q14) of the first switch (Q1) is connected to the first connection terminal (511) of the first resistor unit (2051), and the second connection terminal (512) of the first resistor unit (2051) functions as the output terminal (52) of the first signal control circuit (205).

4. The disconnection detection circuit (204) comprises a second switch (Q2), a third switch (Q3), a first resistor (R1), and a second resistor (R2), The first connection terminal (Q21) of the second switch (Q2) functions as the input terminal (41) of the disconnection detection circuit (204), the second connection terminal (Q22) of the second switch (Q2) is connected to the first connection terminal (R101) of the first resistor (R1) and the first connection terminal (R201) of the second resistor (R2), and the second connection terminal (R102) of the first resistor (R1) is connected to the second power supply (S2). The control system (2) according to claim 2, wherein the second connection terminal (R202) of the second resistor (R2) is connected to the first connection terminal (Q31) of the third switch (Q3), the second connection terminal (Q32) of the third switch (Q3) functions as the output terminal of the disconnection detection circuit (204), and the third connection terminal (Q23) of the second switch (Q2) and the third connection terminal (Q33) of the third switch (Q3) are grounded.

5. The control system (2) according to claim 2, wherein the gun connection identification circuit (206) comprises a comparator (IC1A), the inverting input terminal (IC1A1) of the comparator (IC1A) functions as the input terminal (61) of the gun connection identification circuit (206), the non-inverting input terminal (IC1A2) of the comparator (IC1A) is connected to a reference voltage (Vref), and the output terminal (IC1A3) of the comparator (IC1A) functions as the output terminal (62) of the gun connection identification circuit (206).

6. The charge detection module (20) further comprises a third protection circuit (207), the third protection circuit (207) comprising a third transient suppression diode (TVS3), a fifth resistor (R3), and a diode unit (2071), The first connection terminal (T301) of the third transient suppression diode (TVS3) functions as the input terminal of the third protection circuit (207), the first connection terminal (T301) of the third transient suppression diode (TVS3) is connected to the first connection terminal (R301) of the fifth resistor (R3), and the second connection terminal (T302) of the third transient suppression diode (TVS3) is grounded. The control system (2) according to claim 1, wherein the second connection terminal (R302) of the fifth resistor (R3) and the first connection terminal (711) of the diode unit (2071) are connected to function as output terminals of the third protection circuit (207), the second connection terminal (712) of the diode unit (2071) is configured to be connected to the fifth power supply (S5), and the third connection terminal (713) of the diode unit (2071) is grounded.

7. The charging control module (21) comprises a first protection circuit (215) and a second signal control circuit (216), The control system (2) according to claim 1, wherein the input terminal (151) of the first protection circuit (215) is connected to the first input port (211) of the charging control module (21), the first output terminal (152) of the first protection circuit (215) is connected to the input terminal (161) of the second signal control circuit (216), and the output terminal (162) of the second signal control circuit (216) is connected to the first output port (213) of the charging control module (21).

8. The second signal control circuit (216) comprises a first photocoupler (PC1) and a third resistor (R12), wherein the first connection terminal (A1) of the first photocoupler (PC1) functions as the input terminal (161) of the second signal control circuit (216), and the second connection terminal (A2) and the third connection terminal (A3) of the first photocoupler (PC1) are connected to the first connection terminal (R121) of the third resistor. The control system (2) according to claim 7, wherein the first connection terminal (R121) of the third resistor (R12) functions as the output terminal (162) of the second signal control circuit (216), the second connection terminal (R122) of the third resistor (R12) is configured to be connected to the third power supply (S3), and the fourth connection terminal (A4) and the fifth connection terminal (A5) of the first photocoupler (PC1) are grounded.

9. The charging control module (21) further comprises a second protection circuit (217) and a third signal control circuit (218), The control system (2) according to claim 7, wherein the first input terminal (171) of the second protection circuit (217) is connected to the second input port (212) of the charging control module (21), the second input terminal (172) of the second protection circuit is connected to the second output terminal (153) of the first protection circuit (215), the first output terminal (173) of the second protection circuit (217) is connected to the first input terminal (181) of the third signal control circuit (218), the second output terminal (174) of the second protection circuit (217) is connected to the second input terminal (182) of the third signal control circuit (218), and the output terminal (183) of the third signal control circuit (218) is connected to the second output port (214) of the charging control module (21).

10. The third signal control circuit (218) comprises a second photocoupler (PC2) and a fourth resistor (R13), wherein the first connection terminal (B1) of the second photocoupler (PC2) functions as the first input terminal (181) of the third signal control circuit (218), the second connection terminal (B2) of the second photocoupler (PC2) functions as the second input terminal (182) of the third signal control circuit (218), and the third connection terminal (B3) of the second photocoupler (PC2) and the second photocoupler The control system (2) according to claim 9, wherein the fourth connection terminal (B4) of (PC2) is connected to the first connection terminal (R131) of the fourth resistor (R13), the first connection terminal (R131) of the fourth resistor (R13) functions as the output terminal (183) of the third signal control circuit (218), the second connection terminal (R132) of the fourth resistor (R13) is configured to connect to the fourth power supply (S4), and the fifth connection terminal (B5) of the second photocoupler (PC2) is grounded.

11. The first protection circuit (215) comprises a first transient suppression diode (TVS1), a second resistor unit (2150), a capacitor (C8), and a first diode (D4). The first connection terminal (T101) of the first transient suppression diode (TVS1) functions as the input terminal (151) of the first protection circuit (215), the first connection terminal (T101) of the first transient suppression diode (TVS1) is connected to the first connection terminal (501) of the second resistor unit (2150), the first connection terminal (501) of the second resistor unit (2150) functions as the second output terminal (153) of the first protection circuit (215), and the second connection terminal (T102) of the first transient suppression diode (TVS1) is grounded. The control system (2) according to claim 7, wherein the second connection terminal (502) of the second resistor unit (2150), the first connection terminal (C81) of the capacitor (C8), and the negative terminal (D41) of the first diode (D4) are connected to function as the first output terminal (152) of the first protection circuit (215), and the third connection terminal (503) of the second resistor unit (2150), the second connection terminal (C82) of the capacitor, and the positive terminal (D42) of the first diode (D4) are grounded.

12. The second protection circuit (217) comprises a second transient suppression diode (TVS2), a third resistor unit (2170), and a second diode (D5). The first connection terminal (T201) of the second transient suppression diode (TVS2) functions as the first input terminal (171) of the second protection circuit (217), and the first connection terminal (T201) of the second transient suppression diode (TVS2) is connected to the first connection terminal (701) of the third resistor unit (2170). The control system (2) according to claim 9, wherein the second connection terminal (702) of the third resistor unit (2170) functions as the second input terminal (172) of the second protection circuit (217), the third connection terminal (703) of the third resistor unit (2170) and the negative terminal (D51) of the second diode (D5) are connected to function as the first output terminal (173) of the second protection circuit (217), and the fourth connection terminal (704) of the third resistor unit (2170) and the positive terminal (D52) of the second diode (D5) are connected to function as the second output terminal (174) of the second protection circuit (217).

13. The control system (2) further comprises a first DC contactor (23) and a second DC contactor (24), The first connection terminal (2301) of the first DC contactor (23) is configured to be connected to the first charging port of the charging pile (3), and the second connection terminal (2302) of the first DC contactor (23) is configured to be connected to the positive terminal of the battery pack (10), The control system (2) according to claim 1, wherein the first connection terminal (2401) of the second DC contactor (24) is configured to be connected to the second charging port of the charging pile (3), and the second connection terminal (2402) of the second DC contactor (24) is configured to be connected to the negative electrode of the battery pack (10).

14. An integrated controller (11) comprising a control system (2) according to any one of claims 1 to 13.

15. The integrated controller (11) according to claim 14, wherein the integrated controller (11) further comprises a box (111), and the charge detection module (20), the charge control module (21), and the vehicle controller (22) are integrated within the box (111).

16. The integrated controller (11) according to claim 15, wherein the integrated controller (11) further comprises a motor control unit (112), and the motor control unit (112) is integrated within the box (111).

17. An electric vehicle (1) comprising a battery pack (10) and an integrated controller (11) according to any one of claims 14 to 16.

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