Vehicle charging control circuit, control method and device

Abstract

The embodiment of the invention provides a vehicle charging control circuit, control method and device, and the method comprises the steps: controlling a contactor of a loop where a detection resistor is located to be closed when the insertion of at least two charging guns is detected, so as to enable the detection resistor to be connected with a charging port communication loop corresponding to a vehicle end controller in parallel, lines, communicating with the charging pile end controller, in the two vehicle end controllers are controlled to be in short circuit through a contactor, a loop resistance value is detected through a resistance value measuring device, the communication mode of the charging pile is determined according to the loop resistance value, and charging communication interaction with the charging pile is carried out according to the communication mode of the charging pile. The communication mode of the charging pile is determined by detecting the resistance value, and then charging communication interaction is performed by adopting an adaptive mode, so that the situation that normal charging cannot be performed due to mismatching of the communication modes of the vehicle end and the charging pile end is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a vehicle charging control circuit and control method and device. BACKGROUND

[0002] Due to the strong demand of users for high-power charging, the maximum charging current of single-gun (charging gun) direct current charging is 250A, which is difficult to meet the demand. Some vehicles provide double-gun direct current charging to improve the charging power.

[0003] However, when charging a vehicle using double guns, different communication methods exist. If the communication methods of the vehicle end and the charging pile end do not match, it will result in abnormal charging. SUMMARY

[0004] In view of the above problems, a vehicle charging control circuit and control method and device are provided to overcome the above problems or at least partially solve the above problems, comprising:

[0005] A vehicle charging control circuit, the vehicle having at least two charging ports, the vehicle charging control circuit comprising two vehicle end controllers, a detection resistor provided for each vehicle end controller, and a resistance measuring device;

[0006] Each vehicle end controller and the charging pile end controller form a charging port communication loop through a line;

[0007] The detection resistor is connected in parallel with the charging port communication loop through a contactor;

[0008] The lines through which the two vehicle end controllers and the charging pile end controller communicate are short-circuited to each other through contactors, and the resistance measuring device is connected in the charging port communication loop.

[0009] Optionally, the two vehicle end controllers include a first vehicle end controller and a second vehicle end controller, the first vehicle end controller and the charging pile end controller form a first charging port communication loop through a line, and the second vehicle end controller and the charging pile end controller form a second charging port communication loop through a line;

[0010] The detection resistor includes a first detection resistor and a second detection resistor, the first detection resistor is connected in parallel with the first charging port communication loop through a first contactor, and the second detection resistor is connected in parallel with the second charging port communication loop through a second contactor.

[0011] Optionally, the lines through which the first vehicle end controller and the charging pile end controller communicate and the lines through which the second vehicle end controller and the charging pile end controller communicate are short-circuited to each other through a third contactor and a fourth contactor; and the resistance measuring device is connected in the first charging port communication loop.

[0012] Optionally, the first vehicle end controller and the charging pile end controller are connected through a fifth contactor and a sixth contactor, and the second vehicle end controller and the charging pile end controller are connected through a seventh contactor and an eighth contactor.

[0013] A control method based on the vehicle charging control circuit as described above, the method comprising:

[0014] When at least two charging guns are detected to be inserted, a loop contactor in which the detection resistor is located is controlled to be closed, so that the detection resistor is connected in parallel with a charging port communication loop corresponding to the vehicle end controller, and the charging port communication loop is in an open state;

[0015] The lines through which the two vehicle end controllers communicate with the charging pile end controller are controlled to be short-circuited with each other;

[0016] The loop resistance value is detected by the resistance measuring device;

[0017] According to the loop resistance value, the communication mode of the charging pile is determined, and the charging communication interaction with the charging pile is performed according to the communication mode of the charging pile.

[0018] Optionally, the charging communication interaction with the charging pile according to the communication mode of the charging pile comprises:

[0019] The target charging program that matches the communication mode of the charging pile is determined;

[0020] The charging communication interaction with the charging pile is performed according to the target charging program.

[0021] Optionally, before the charging communication interaction with the charging pile according to the communication mode of the charging pile, the method further comprises:

[0022] The loop contactor in which the detection resistor is located is controlled to be opened.

[0023] Optionally, the communication mode of the charging pile is any one of the following: master-slave type communication mode, independent type communication mode;

[0024] In the master-slave type communication mode, the charging pile has one charging pile end controller, and the two vehicle end controllers communicate with one charging pile end controller;

[0025] In the independent type communication mode, the charging pile has two charging pile end controllers, and the two vehicle end controllers respectively communicate with one of the two charging pile end controllers.

[0026] Optionally, before the charging communication interaction with the charging pile according to the communication mode of the charging pile, further comprising:

[0027] When the communication mode is master-slave type communication, the communication loop of the charging port corresponding to one of the two vehicle end controllers is controlled to be connected.

[0028] Optionally, before the charging communication interaction with the charging pile according to the communication mode of the charging pile, further comprising:

[0029] When the communication mode is independent type communication, the line for communication between the two vehicle end controllers and the charging pile end controller is controlled to be disconnected and short-circuited, and the communication loops of the charging ports corresponding to the two vehicle end controllers are controlled to be connected.

[0030] Optionally, the determination of the communication mode of the charging pile according to the loop resistance value comprises:

[0031] When the loop resistance value is within a first resistance value range, the communication mode of the charging pile is determined to be master-slave type communication; when the loop resistance value is within a second resistance value range, the communication mode of the charging pile is determined to be independent communication; wherein the resistance value within the first resistance value range is greater than the resistance value within the second resistance value range.

[0032] A control device based on the vehicle charging control circuit as described above, the device is used for:

[0033] When at least two charging guns are detected to be inserted, the contactor of the loop where the detection resistor is located is controlled to be attracted to connect the detection resistor in parallel with the charging port communication loop corresponding to the vehicle end controller, and the charging port communication loop is in a disconnected state;

[0034] The lines for communication between the two vehicle end controllers and the charging pile end controller are controlled to be short-circuited through the contactor;

[0035] The loop resistance value is detected through the resistance value measuring device;

[0036] According to the loop resistance value, the communication mode of the charging pile is determined, and the charging communication interaction with the charging pile is carried out according to the communication mode of the charging pile.

[0037] An electronic device comprising a processor, a memory, and a computer program stored on the memory and capable of running on the processor, the computer program being executed by the processor to implement the method as described above.

[0038] A computer readable storage medium, the computer readable storage medium stores a computer program, the computer program is executed by a processor to implement the method as described above.

[0039] The embodiments of the present application have the following advantages:

[0040] In the embodiments of the present application, when at least two charging guns are detected to be inserted, the detection resistance is connected in parallel with the communication loop of the charging port corresponding to the vehicle end controller by controlling the contactor in the loop where the detection resistance is located to be attracted, the lines in the two vehicle end controllers corresponding to the charging pile end controller are short-circuited through the contactor, and then the resistance value of the loop is detected through the resistance value measuring device, the communication mode of the charging pile is determined according to the resistance value of the loop, and the charging communication interaction with the charging pile is carried out according to the communication mode of the charging pile, so that the communication mode of the charging pile is determined by detecting the resistance value, and then the charging communication interaction is carried out in a matched mode, and the problem that the charging cannot be normally carried out due to the mismatch of the communication modes of the vehicle end and the charging pile end is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0042] Figure 1 is a schematic diagram of a vehicle charging control circuit provided by some embodiments of the present application;

[0043] Figure 2 is a step flow chart of a control method based on the vehicle charging control circuit provided by some embodiments of the present application;

[0044] Figure 3 is a schematic diagram of another vehicle charging control circuit provided by some embodiments of the present application;

[0045] Figure 4 is a schematic diagram of another vehicle charging control circuit provided by some embodiments of the present application;

[0046] Figure 5 is a schematic diagram of another vehicle charging control circuit provided by some embodiments of the present application;

[0047] Figure 6 is a schematic diagram of another vehicle charging control circuit provided by some embodiments of the present application;

[0048] Figure 7 is a schematic diagram of another vehicle charging control circuit provided by some embodiments of the present application;

[0049] Figure 8 is a schematic diagram of another vehicle charging control circuit provided by some embodiments of the present application;

[0050] Figure 9 is a step flow chart of another control method of a vehicle charging control circuit provided by some embodiments of the present application;

[0051] Figure 10 is a step flow chart of another control method of a vehicle charging control circuit provided by some embodiments of the present application;

[0052] Figure 11 is a step flow chart of another control method of a vehicle charging control circuit provided by some embodiments of the present application;

[0053] Figure 12 is a step flow chart of another control method of a vehicle charging control circuit provided by some embodiments of the present application. DETAILED DESCRIPTION

[0054] In order to make the above objectives, characteristics and advantages of the present application more apparent, comprehensible and easier to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative labor fall within the scope of protection of the present application.

[0055] There are master-slave type communication and independent type communication when charging a vehicle using double guns, which are as follows:

[0056] In the master-slave type communication, only one CAN is used for communication interaction between the whole vehicle and the charging pile, that is, the CAN lines of the two DC charging ports of the vehicle need to be shorted together.

[0057] In the independent type communication, two CANs are used for communication interaction between the whole vehicle and the charging pile, and the two DC charging networks can be independently communicated and controlled.

[0058] Since the vehicle end can have master-slave or independent communication, and the charging pile end can also have master-slave or independent communication, incompatible situations may occur between various combinations of vehicles and piles, resulting in abnormal charging. There are the following four different combination modes under two-by-two combinations:

[0059] 1. Both the vehicle and the pile are master-slave communication: this combination mode can realize normal single-gun and double-gun charging, and the charging information is interacted by the master charging network.

[0060] 2. Both the vehicle and the pile are independent communication: this combination mode can realize normal single-gun and double-gun charging, and the charging information is interacted by the charging network corresponding to each gun.

[0061] 3, the vehicle is master-slave communication, and the pile is independent communication: this combination mode can only realize normal charging of a single gun, when the second gun is connected or two guns are connected for charging at the same time, only the main gun charging is started, and even the main gun may be affected by the second gun, resulting in that the normal charging cannot be realized.

[0062] 4, the vehicle is independent communication, and the pile is master-slave communication: this combination mode can only realize normal charging of a single gun, when the second gun is connected or two guns are connected for charging at the same time, only the main gun charging is started, and even the main gun may be affected by the second gun, resulting in that the normal charging cannot be realized.

[0063] For the above-mentioned points 3 and 4, when two guns are charged, the master-slave and independent communication modes cannot be automatically identified, and then two charging modes cannot be simultaneously compatible for charging, so that the part of charging function is affected, and the customer experience is poor.

[0064] In the embodiment of the application, the vehicle BMS (Battery Management System, battery management system) detects and compares the resistance value of the charging communication loop, judges the communication mode of the charging pile end, and automatically calls the corresponding program to realize the whole charging process, effectively reduces the matching problem of the vehicle and the pile, improves the charging efficiency and convenience, and improves the user experience.

[0065] Through the embodiment of the application, the vehicle body has better self-adaptive ability, when the initial charging cannot identify the related communication mode of the charging pile, the detection circuit itself is used to distinguish the similarities and differences of the communication mode of the charging pile end, so as to achieve the rapid response of the initial charging state, reduce the charging fault error rate, and improve the customer satisfaction. Compared with increasing the detection mechanism at the pile end, increasing the mechanism at the vehicle end has better adaptability, and the cost is lower than that of the pile end.

[0066] Referring to Figure 1 , a schematic diagram of a vehicle charging control circuit is shown, the vehicle charging control circuit can be a circuit in the battery management system of the vehicle, and the vehicle can have at least two charging ports, which can include two, three, four, or even more.

[0067] Among them, the vehicle charging control circuit can include two vehicle end controllers, a detection resistor arranged for each vehicle end controller, and a resistance measuring device.

[0068] Each vehicle-side controller and the charging pile-side controller form a charging port communication loop through a line. In some examples, when there is only one charging pile-side controller, each vehicle-side controller can form a charging port communication loop with the same charging pile-side controller. When there are two charging pile-side controllers, each vehicle-side controller can form a charging port communication loop with different charging pile-side controllers.

[0069] The sensing resistor is connected in parallel with the charging port communication circuit via a contactor. In some examples, there are two sensing resistors, each in one of the charging port communication circuits.

[0070] The communication lines between the two vehicle-side controllers and the charging pile-side controller are short-circuited to each other via contactors. That is to say, the communication lines between each vehicle-side controller and the charging pile-side controller can each form a charging port communication circuit. The two charging port communication circuits can be short-circuited to each other via contactors, thus forming the same circuit. The resistance measuring device is connected within the charging port communication circuit.

[0071] In some embodiments of the present invention, the two vehicle-end controllers include a first vehicle-end controller and a second vehicle-end controller, such as... Figure 1 , Figures 3-8 The controller 1 is the first vehicle-end controller and the controller 2 is the second vehicle-end controller. The first vehicle-end controller and the charging pile-end controller form a first charging port communication loop through the line, and the second vehicle-end controller and the charging pile-end controller form a second charging port communication loop through the line.

[0072] In some embodiments of the present invention, the detection resistor includes a first detection resistor and a second detection resistor. The first detection resistor is connected in parallel with the first charging port communication circuit through a first contactor, and the second detection resistor is connected in parallel with the second charging port communication circuit through a second contactor. Figure 1 , Figures 3-8 In the middle resistor R1, the first detection resistor is R2, the second detection resistor is KT1, the first contactor is KT2, and the second contactor is KT2.

[0073] In some examples, the first and second sensing resistors can have the same resistance value, and the first and second sensing resistors can be set to the same resistance value as the terminating resistors of the first vehicle-end controller, the second vehicle-end controller, the first pile-end controller, and the second pile-end controller, such as 60 ohms. Figures 3-8 The first detection resistor R1, the second detection resistor R2, the first vehicle-end controller terminal resistor R3, the second vehicle-end controller terminal resistor R4, the first pile-end controller terminal resistor R5, and the second pile-end controller terminal resistor R6 are all set to the same resistance value.

[0074] In some embodiments of the present invention, the communication lines between the first vehicle-side controller and the charging pile-side controller, and the communication lines between the second vehicle-side controller and the charging pile-side controller, are short-circuited to each other via a third contactor and a fourth contactor. A resistance measuring device is connected within the first charging port communication circuit. Figure 1 , Figures 3-8 Contactor KT3 is the third contactor, and contactor KT4 is the fourth contactor.

[0075] In some embodiments of the present invention, the first vehicle-side controller and the charging pile-side controller are connected via a fifth contactor and a sixth contactor, and the second vehicle-side controller and the charging pile-side controller are connected via a seventh contactor and an eighth contactor, such as... Figure 1 , Figures 3-8 Contactor KT5 is the fifth contactor, and contactor KT6 is the sixth contactor.

[0076] The following combination Figure 1 , Figures 3-8 Introduction to the vehicle and charging station ends:

[0077] like Figure 1 , Figures 3-8 The vehicle charging control circuit may include vehicle controller 1 (i.e., vehicle-end controller), vehicle controller 2, detection resistor R1, detection resistor R2, vehicle controller 1 terminal resistor R3, vehicle controller 2 terminal resistor R4, resistance measuring device, contactors KT1-KT8 for controlling the opening and closing of the corresponding circuit, and related detection circuits.

[0078] For the vehicle side:

[0079] The vehicle's BMS has two charging controllers (i.e., vehicle-side controllers), each with two DC charging circuits. Each DC charging circuit can independently interact with the charging station, and the BMS can control the two DC charging circuits independently.

[0080] In some examples, the two charging ports are defined as Charging Port 1 and Charging Port 2 (there is no primary or secondary distinction between the two charging ports), and the two charging ports are connected to the BMS via a CAN network. The controller of the circuit where the charging port connected to charging gun 1 is located is defined as Vehicle Controller 1, and the controller of the circuit where the charging port connected to charging gun 2 is located is defined as Vehicle Controller 2.

[0081] Each of the two charging controllers contains a 120-ohm resistor, which serves as the vehicle controller's terminating resistor. These resistors correspond to the charging communication circuits for charging port 1 and charging port 2, respectively. Furthermore, a detection resistor is connected in parallel within each of these charging communication circuits. In some examples, this detection resistor is also set to 120 ohms, but it can also be set to other values.

[0082] When two charging guns are connected to the charging port for charging, the plug-in signal is transmitted to the BMS controller through the drive module. The charging gun that receives the plug-in signal first is defined as charging gun 1, and the charging gun that receives the plug-in signal later is defined as charging gun 2. At the same time, the plug-in signal received later triggers the BMS terminal resistance detection mechanism, and the BMS determines the communication mode at the pile end through the mechanism and automatically calls the corresponding master-slave or independent communication program to realize the charging interaction.

[0083] After the automatic start of the communication loop terminal resistance detection mechanism, the loop contactor is attracted by the detection resistance, and the loop resistance is detected in real time through the resistance detection device.

[0084] If the pile end adopts the master-slave communication mode, the resistance value of the charging loop detected is about 40 ohms, that is, three 120-ohm resistors are connected in parallel, and it is determined that the communication mode adopted by the pile end is the master-slave communication mode. The BMS immediately calls the master-slave communication program stored in the controller, and after the program is called, the loop contactor with the detection resistance is disconnected. The vehicle end and the charging pile end perform subsequent charging handshake process.

[0085] If the pile end adopts the independent communication mode, the resistance value of the communication loop at this time is about 30 ohms, that is, four 120-ohm resistors are connected in parallel, so it is determined that the communication mode adopted by the pile end is the independent communication mode, and the corresponding independent communication program is called to realize the charging communication interaction.

[0086] For the charging pile end:

[0087] If the charging pile is a master-slave type charging pile, such as Figure 3 , the charging pile has only one charging communication controller inside, which is defined as pile controller 1. If the charging pile is an independent type charging pile, such as Figure 4 , the charging pile has at least two charging communication controllers inside, which are defined as pile controller 1 and pile controller 2, and the corresponding terminal resistors inside are defined as R5 and R6.

[0088] The loop resistance value needs to be 60 ohms during charging communication. Since the resistance values of R3 and R4 are 120 ohms, and the resistance values of R5 and R6 are also 120 ohms. The two charging communication loops do not interfere with each other during charging, and can independently communicate with the vehicle to be charged.

[0089] The charging pile can be provided with at least two charging guns, which can be defined as the first charging gun inserted into the charging port as charging gun 1, and the second charging gun inserted into the charging port as charging gun 2. Charging gun 1 and charging gun 2 can be converted to each other under the above conditions, and charging gun 1 and charging gun 2 are connected through the CAN bus inside the charging pile.

[0090] In some examples, the charging gun 1 can configure the charging parameter of the charging gun 2 through the CAN bus and collect the charging information of the charging gun 2. When the BMS detects the second gun insertion signal in the double-gun charging, the BMS starts the terminal resistance detection mechanism, and detects the contactor attraction of the loop where the resistance is located.

[0091] If the pile end adopts the master-slave communication mode, the resistance value of the entire communication loop detected by the resistance value measuring device is about 40 ohms, that is, three 120 ohm resistors are connected in parallel, and it is judged that the communication mode adopted by the charging pile end is the master-slave communication, and the BMS controller calls the internal stored master-slave communication program, and after the program calling is completed, the detection resistance circuit contactor is disconnected, and the vehicle pile enters the subsequent charging interaction process.

[0092] If the pile end adopts the independent communication mode, the resistance value of the communication loop detected by the resistance value measuring device at this time is 30 ohms, and it is judged that the mode adopted by the pile end is independent communication, and the BMS calls the internal stored independent communication program, and after the program calling is completed, the detection resistance circuit contactor is disconnected. Other corresponding contactors are attracted, and the vehicle pile enters the subsequent charging process.

[0093] Referring to Figure 2 , a step flow chart of a control method based on a vehicle charging control circuit is shown, which can specifically include the following steps:

[0094] Step 201, when at least two charging guns are detected to be inserted, the contactor in the loop where the detection resistance is located is attracted to connect the detection resistance in parallel with the charging port communication loop corresponding to the vehicle end controller, and the charging port communication loop is in an open circuit state.

[0095] In actual application, before matching the corresponding communication mode with the charging pile, each vehicle end controller and the charging pile end controller form a charging port communication loop through the line in an open circuit state, such as Figure 1 、 Figures 3-8 In the contactor KT8-KT8 is in an open state.

[0096] In the case of double-gun charging, two charging guns in the charging pile can be inserted into two charging ports of the vehicle, and after the second charging gun is inserted into the charging port, the resistance detection mechanism can be started, and then the contactor in the loop where the detection resistance is located can be attracted, such as Figure 5 、 Figure 7 In the R1, R2 is the detection resistance, and the KT1, KT2 is the contactor in the loop where the detection resistance is located. After the contactor in the loop where the detection resistance is located is attracted, the detection resistance is connected in parallel with the charging port communication loop corresponding to the vehicle end controller.

[0097] Step 202, control the line of the two vehicle end controllers to be short-circuited by contactor.

[0098] In practical application, since the vehicle has two vehicle end controllers, when the resistance value is detected, the vehicle end controller is not connected to the loop, for example, Figures 5-8 KT5-KT8 in the middle is disconnected, and each vehicle end controller has a line to communicate with the charging pile end controller, in order to facilitate the resistance value measuring device to measure the resistance value of the whole loop, the lines in each vehicle end controller to communicate with the charging pile end controller can be short-circuited, for example, Figure 5 、 Figure 7 KT3 and KT4 in the middle are closed to realize short-circuiting.

[0099] Step 203, detect the loop resistance value by the resistance value measuring device.

[0100] In some examples, the resistance value detecting device can be connected to the line of one of the vehicle end controllers.

[0101] After detecting the parallel resistance and short-circuiting the lines of the two vehicle end controllers, the loop resistance value of the whole loop can be detected by the resistance value measuring device.

[0102] Step 204, determine the communication mode of the charging pile according to the loop resistance value, and perform charging communication interaction with the charging pile according to the communication mode of the charging pile.

[0103] After obtaining the loop resistance value, since the loop resistance value formed under the communication mode of the charging pile is different, the communication mode of the charging pile can be determined according to the loop resistance value, and then the charging pile is interacted with the charging pile in a mode matched with the communication mode of the charging pile.

[0104] In some embodiments of the present application, the communication mode of the charging pile is any one of the following:

[0105] Master-slave type communication mode, independent type communication mode.

[0106] In the master-slave type communication mode, the charging pile has one charging pile end controller, and the two vehicle end controllers communicate with one charging pile end controller.

[0107] In the independent type communication mode, the charging pile has two charging pile end controllers, and the two vehicle end controllers respectively communicate with one of the two charging pile end controllers.

[0108] In some embodiments of the present application, the determining the communication mode of the charging pile according to the loop resistance value comprises: when the loop resistance value is in a first resistance value range, determining the communication mode of the charging pile as master-slave type communication; and when the loop resistance value is in a second resistance value range, determining the communication mode of the charging pile as independent communication; wherein the resistance value in the first resistance value range is greater than the resistance value in the second resistance value range.

[0109] In some examples, the controller terminal resistance can be 120 ohms, the charging pile terminal resistance can be 120 ohms, and the detection resistance can also be 120 ohms (of course, other values can also be set), the first resistance value range includes a resistance value of 40 ohms, and the second resistance value range includes a resistance value of 30 ohms.

[0110] In some embodiments of the present application, the charging communication interaction with the charging pile according to the communication mode of the charging pile comprises: determining a target charging program matched with the communication mode of the charging pile; and performing the charging communication interaction with the charging pile according to the target charging program.

[0111] In actual application, two programs are stored in the BMS of the vehicle, corresponding to the independent communication program and the master-slave communication program respectively, the independent communication program is matched with the independent type communication mode, and the master-slave communication program is matched with the master-slave type communication mode. The communication loop terminal resistance detection mechanism is added in the BMS of the vehicle to automatically identify the communication mode adopted by the pile end. After the identification is completed, different communication programs stored in the BMS are called to realize the correct charging communication interaction between the vehicle end and the pile end.

[0112] In some embodiments of the present application, before the charging communication interaction with the charging pile according to the communication mode of the charging pile, the method further comprises:

[0113] controlling the loop contactor in which the detection resistance is located to be disconnected.

[0114] After the communication mode is determined and the corresponding charging program is matched, the resistance value detection process can be ended, and the subsequent charging communication interaction can be entered. The loop contactor in which the detection resistance is located can be controlled to be disconnected, such as controlling Figures 1-8 KT1 and KT2 to be disconnected.

[0115] In some embodiments of the present application, before the charging communication interaction with the charging pile according to the communication mode of the charging pile, the method further comprises:

[0116] when the communication mode is the master-slave type communication, controlling the charging port communication loop passage corresponding to one of the two vehicle end controllers.

[0117] Since there is only one controller in the master-slave type communication, one of the two vehicle end controllers uses a CAN line to communicate with the charging pile end controller, so the communication loop of the charging port corresponding to the one of the two vehicle end controllers can be controlled, such as Figure 6 , by controlling KT5 and KT6 to be closed, and then controller 1 is connected to the loop.

[0118] Moreover, since the line for communication between the two vehicle end controllers and the charging pile end controller is short-circuited, such as Figures 1-8 , after KT3 and KT4 are closed, the short-circuiting can be maintained, such as Figure 6 , by continuing to keep KT3 and KT4 closed, and then the short-circuiting of the line for communication between the two vehicle end controllers and the charging pile end controller is maintained, so that the two vehicle end controllers use a CAN line to communicate with the charging pile end controller.

[0119] In some embodiments of the application, before the charging communication interaction with the charging pile according to the communication mode of the charging pile, the following steps are further included:

[0120] When the communication mode is independent type communication, the line for communication between the two vehicle end controllers and the charging pile end controller is disconnected, and the communication loops of the charging ports corresponding to the two vehicle end controllers are both connected.

[0121] Since there are two controllers in the independent type communication, the two vehicle end controllers use their own CAN lines to communicate with the charging pile end controller, so the line for communication between the two vehicle end controllers and the charging pile end controller can be disconnected, such as Figure 8 , by controlling KT3 and KT4 to be disconnected, and the communication loops of the charging ports corresponding to the two vehicle end controllers can be both connected, such as by controlling KT35-KT8 to be closed, so that controller 1 and controller 1 are connected to the loop.

[0122] The following will be described in conjunction with the accompanying Figures 5-8 The resistance detection and communication process are described as follows:

[0123] When the charging pile end is a master-slave type charging pile, such as Figure 5 , after the charging gun 2 is inserted, KT1, KT2, KT3 and KT4 are closed after the BMS controller receives the gun insertion signal, and the detection resistors R1 and R2 are connected to the communication loop, at this time the communication loop only has the pile controller 1 resistor R5 and the detection resistors R1 and R2 in parallel.

[0124] Since the resistance values of the three resistors are all 120 ohms, the terminal resistance value measured by the resistance detection device is 40 ohms. The resistance controller transmits the value to the BMS controller through CAN communication, and the BMS controller matches the corresponding master-slave type charging program according to the received resistance value.

[0125] After the program successfully matches, such as Figure 6 KT1 and KT2 are disconnected, while KT5 and KT6 are closed. The detection resistor is disconnected from the communication circuit, and the resistance detection device also stops working. At this time, the communication circuit only has resistors R5 and R3 of pile controller 1 (two 120Ω resistors connected in parallel to obtain 60Ω), which meets the normal charging communication conditions, and the vehicle-pile can proceed with the subsequent charging process.

[0126] When the charging station is a stand-alone charging station, such as Figure 7 After the charging gun 2 is inserted, the BMS controller receives the insertion signal and closes KT1, KT2, KT3, and KT4. The detection resistors R1 and R2 are connected to the communication circuit. At this time, the communication circuit has resistor R5 of pile controller 1, resistor R6 of pile controller 2, and detection resistors R1 and R2 connected in parallel.

[0127] Since the resistance of each of the four resistors is 120 ohms, the resistance detection device measures the terminal resistance to be 30 ohms. The resistance controller transmits this value to the BMS controller via CAN communication. The BMS controller then matches the corresponding independent charging program based on the received resistance value.

[0128] After a successful match, such as Figure 8 When KT1, KT2, KT3, and KT4 are disconnected, the detection resistor is disconnected from the communication circuit, and the resistance detection device also stops working. When KT5, KT6, KT7, and KT8 are closed, resistors R3 and R4 of vehicle controller 1 and vehicle controller 2 are connected to the circuit. At this time, resistor R3 of vehicle controller 1 and resistor R5 of pile controller 1 form one communication circuit, and resistor R4 of vehicle controller 2 and resistor R6 of pile controller 1 form another communication circuit. Each communication circuit meets the resistance conditions of the normal charging communication terminal, and then the vehicle and pile proceed with the subsequent charging process.

[0129] In this embodiment of the invention, when at least two charging guns are detected being inserted, the contactor in the circuit containing the detection resistor is activated to connect the detection resistor in parallel with the charging port communication circuit corresponding to the vehicle-side controller. The lines in the two vehicle-side controllers that communicate with the charging pile-side controller are short-circuited to each other through the contactor. Then, the circuit resistance value is detected by a resistance measuring device. Based on the circuit resistance value, the communication mode of the charging pile is determined, and charging communication interaction is performed with the charging pile according to the communication mode of the charging pile. This realizes the determination of the charging pile's communication mode by detecting the resistance value, and then adopts a matching method for charging communication interaction, avoiding the inability to charge normally due to the mismatch between the communication modes of the vehicle-side and the charging pile-side.

[0130] Reference Figure 9, another step flow chart of the control method based on the vehicle charging control circuit is shown, and the control method can include the following steps:

[0131] In step 901, when at least two charging guns are detected to be inserted, the detection resistor is controlled to be connected in parallel with the charging port communication circuit corresponding to the vehicle end controller through the closing of the loop contactor, and the charging port communication circuit is in an open state.

[0132] In step 902, the lines corresponding to the two vehicle end controllers and the charging pile end controller are controlled to be short-circuited through the contactor.

[0133] In step 903, the loop resistance value is detected through the resistance measuring device.

[0134] In step 904, the communication mode of the charging pile is determined according to the loop resistance value.

[0135] In step 905, the target charging program matched with the communication mode of the charging pile is determined.

[0136] In step 906, when the communication mode is a master-slave type communication, the charging port communication circuit corresponding to one of the two vehicle end controllers is controlled to be in a pass-through state.

[0137] In step 907, the charging communication interaction with the charging pile is performed according to the target charging program.

[0138] Referring to Figure 10 , another step flow chart of the control method based on the vehicle charging control circuit is shown, and the control method can include the following steps:

[0139] In step 1001, when at least two charging guns are detected to be inserted, the detection resistor is controlled to be connected in parallel with the charging port communication circuit corresponding to the vehicle end controller through the closing of the loop contactor, and the charging port communication circuit is in an open state.

[0140] In step 1002, the lines corresponding to the two vehicle end controllers and the charging pile end controller are controlled to be short-circuited through the contactor.

[0141] In step 1003, the loop resistance value is detected through the resistance measuring device.

[0142] In step 1004, the communication mode of the charging pile is determined according to the loop resistance value.

[0143] In step 1005, the target charging program matched with the communication mode of the charging pile is determined.

[0144] Step 1006, when the communication mode is independent communication, the line of the two vehicle controllers communicating with the charging pile controller is disconnected and shorted, and the communication loop of the corresponding charging port of the two vehicle controllers is controlled to be connected.

[0145] Step 1007, according to the target charging program, the charging communication interaction with the charging pile is carried out.

[0146] The following is Figure 1 、 Figures 3-8 Based on the structure, combined with Figure 11 and Figure 12 are illustrated as follows:

[0147] As shown in Figure 11 , the following steps are included:

[0148] 1. Connect two charging guns with the charging interface of the vehicle to be charged, and first establish a plug-in signal communication with the BMS charging control module, which is defined as charging gun 1, and then establish communication, which is defined as charging gun 2. The vehicle to be charged communicates with the charging pile through the BMS system.

[0149] 2. When the system detects the second plug-in signal, the system immediately starts the charging loop terminal resistance detection mechanism, detects the contactor attraction of the resistance loop, and detects the resistance access to the charging communication loop. The resistance value detection device collects the resistance value of the entire loop in real time and feeds back to the BMS controller. The BMS controller matches the received resistance value information with the internal stored charging program, calls the corresponding program, and realizes normal charging.

[0150] 3. If the pile end adopts the master-slave communication mode, the resistance value of the charging communication loop detected by the resistance value detection device is 40 ohms, and the charging program corresponding to the system preset 40 ohm value is the master-slave charging program. Therefore, the system determines that the communication mode adopted by the pile end is master-slave communication, and the BMS immediately calls the master-slave communication program. After the program is called, the detection resistance loop contactor is disconnected, and the vehicle and the charging pile enter the subsequent charging process. If the pile end adopts the independent communication mode, the resistance value of the charging communication loop is 30 ohms, and the charging program corresponding to the system preset 30 ohm value is the independent charging program. The system determines that the communication mode adopted by the pile end is independent communication, and the BMS immediately calls the internal stored independent communication program and enters the subsequent charging process.

[0151] 4. The BMS enters the corresponding charging process. The information sent in the subsequent interaction, including the charging capacity, the charging current, and whether to stop the fault, is processed according to the processing strategy of the corresponding process.

[0152] As shown in Figure 12As shown, when the charging starts, when the charging gun 1 is inserted, at this time, since it is single gun insertion, the system does not trigger the charging communication loop terminal resistance detection mechanism. If the charging gun 2 is inserted at this time, the gun insertion signal of the charging gun 2 is transmitted to the BMS controller through the driving system, and after the BMS controller receives the signal, the system triggers the charging communication loop terminal resistance detection mechanism. The system immediately closes KT1, KT2, KT3 and KT4, and the resistors R1 and R2 are immediately connected to the circuit, and at the same time, the resistance measuring device starts to detect the resistance value of the entire communication loop in real time and feeds back to the vehicle controller.

[0153] The vehicle controller determines according to the resistance value fed back by the resistance measuring device. If the charging pile end is configured as a master-slave type charging pile, the resistance value of the entire charging loop is about 40 ohms. The system compares the resistance value obtained in real time with the value stored in the system. If the resistance value meets the preset requirement, the system immediately calls the pre-stored master-slave charging program, disconnects KT1 and KT2 after the calling is completed, disconnects the loop where the detection resistor is located from the entire communication loop, and then enters the subsequent charging process.

[0154] It should be noted that, for the method embodiments, in order to simply describe, they are all described as a series of action combinations, but those skilled in the art should know that the embodiments of the present application are not limited to the action sequence described, because according to the embodiments of the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions involved are not necessarily necessary for the embodiments of the present application.

[0155] Some embodiments of the present application provide a control device based on a vehicle charging control circuit, which is used for:

[0156] When at least two charging guns are detected to be inserted, the contactor where the detection resistor is located is controlled to be attracted to connect the detection resistor in parallel with the charging port communication loop corresponding to the vehicle end controller, and the charging port communication loop is in an open circuit state;

[0157] The lines of the two vehicle end controllers that communicate with the charging pile end controller are controlled to be short-circuited through the contactor;

[0158] The resistance value of the detection loop is detected through the resistance measuring device;

[0159] According to the loop resistance value, the communication mode of the charging pile is determined, and the charging communication interaction with the charging pile is performed according to the communication mode of the charging pile.

[0160] In some embodiments of the present application, the charging communication interaction with the charging pile according to the communication mode of the charging pile comprises:

[0161] determine a target charging program matching the communication mode of the charging pile;

[0162] interact with the charging pile according to the target charging program.

[0163] In some embodiments of the present application, before the interaction with the charging pile according to the communication mode of the charging pile, the method further comprises:

[0164] controlling the loop contactor in which the detection resistor is located to be disconnected.

[0165] In some embodiments of the present application, the communication mode of the charging pile is any one of the following: master-slave type communication mode, independent type communication mode.

[0166] In the master-slave type communication mode, the charging pile has one charging pile end controller, and the two vehicle end controllers interact with the one charging pile end controller.

[0167] In the independent type communication mode, the charging pile has two charging pile end controllers, and the two vehicle end controllers respectively interact with one of the two charging pile end controllers.

[0168] In some embodiments of the present application, before the interaction with the charging pile according to the communication mode of the charging pile, the method further comprises:

[0169] When the communication mode is the master-slave type communication, controlling the charging port communication loop passage corresponding to one of the two vehicle end controllers.

[0170] In some embodiments of the present application, before the interaction with the charging pile according to the communication mode of the charging pile, the method further comprises:

[0171] When the communication mode is the independent type communication, controlling the line connecting the two vehicle end controllers and the charging pile end controller to be disconnected and short-circuited, and controlling the charging port communication loops corresponding to the two vehicle end controllers to be connected.

[0172] In some embodiments of the present application, the determination of the communication mode of the charging pile according to the loop resistance value comprises:

[0173] When the loop resistance value is within a first resistance value range, the communication mode of the charging pile is determined to be the master-slave type communication; when the loop resistance value is within a second resistance value range, the communication mode of the charging pile is determined to be the independent communication; wherein the resistance value within the first resistance value range is greater than the resistance value within the second resistance value range.

[0174] In the embodiment of the present application, when at least two charging guns are inserted, the detection resistance is connected in parallel with the communication loop of the charging port corresponding to the vehicle end controller by controlling the contactor in the loop where the detection resistance is located to be attracted, the lines of the two vehicle end controllers communicating with the charging pile end controller are short-circuited through the contactor, and then the loop resistance value is detected through the resistance value measuring device, the communication mode of the charging pile is determined according to the loop resistance value, and the charging communication interaction with the charging pile is carried out according to the communication mode of the charging pile, so that the communication mode of the charging pile is determined by detecting the resistance value, and then the charging communication interaction is carried out in a matched mode, thereby avoiding the problem that the charging cannot be normally carried out due to the mismatch of the communication modes of the vehicle end and the charging pile end.

[0175] Some embodiments of the present application also provide an electronic device, which can include a processor, a memory, and a computer program stored on the memory and capable of running on the processor, and the computer program is executed by the processor to implement the method as above.

[0176] Some embodiments of the present application also provide a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the method as above.

[0177] For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the related parts refer to the part of the method embodiments.

[0178] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation portal for user to select authorization or refusal.

[0179] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

[0180] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, device, or computer program product. Therefore, the embodiments of the present application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present application can adopt the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer usable program code.

[0181] The embodiments of the present application are described with reference to the flowchart illustrations and / or block diagrams of the methods, terminal devices (systems) and computer program products according to the embodiments of the present application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal devices to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal devices, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams.

[0182] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal devices to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams.

[0183] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal devices, such that a series of operational steps are carried out on the computer or other programmable terminal devices to produce a computer implemented process so that the instructions executed on the computer or other programmable terminal devices provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams.

[0184] Although preferred embodiments of the present application have been described, those skilled in the art will be able to make additional modifications and variations to these embodiments without departing from the scope of the present application. Accordingly, the appended claims are intended to encompass all such modifications and variations as falling within the scope of the present application.

[0185] Finally, it needs to be pointed out that in this document, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article, or terminal device including a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or terminal device. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or terminal device including the above element.

[0186] The above provides a vehicle charging control circuit, control method and device, and the principles and implementation modes of the present application are described by applying specific examples. The above example is only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, the specific implementation modes and application ranges can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A vehicle charging control circuit, characterized by, The vehicle has at least two charging ports, the vehicle charging control circuit includes two vehicle end controllers, a detection resistor arranged for each vehicle end controller, and a resistance measuring device; Each vehicle end controller and the charging pile end controller form a charging port communication loop through a line; The detection resistor is connected in parallel with the charging port communication loop through a contactor; The lines through which the two vehicle end controllers and the charging pile end controller communicate are short-circuited with each other through a contactor, and the resistance measuring device is connected in the charging port communication loop.

2. The vehicle charging control circuit of claim 1, wherein, The two vehicle end controllers include a first vehicle end controller and a second vehicle end controller, the first vehicle end controller and the charging pile end controller form a first charging port communication loop through a line, and the second vehicle end controller and the charging pile end controller form a second charging port communication loop through a line; The detection resistor includes a first detection resistor and a second detection resistor, the first detection resistor is connected in parallel with the first charging port communication loop through a first contactor, and the second detection resistor is connected in parallel with the second charging port communication loop through a second contactor.

3. The vehicle charging control circuit of claim 2, wherein, The lines through which the first vehicle end controller and the charging pile end controller communicate, and the lines through which the second vehicle end controller and the charging pile end controller communicate are short-circuited with each other through a third contactor and a fourth contactor; and the resistance measuring device is connected in the first charging port communication loop.

4. The vehicle charging control circuit of claim 2, wherein, The first vehicle end controller and the charging pile end controller are connected through a fifth contactor and a sixth contactor, and the second vehicle end controller and the charging pile end controller are connected through a seventh contactor and an eighth contactor.

5. A control method of a vehicle charging control circuit according to any one of claims 1 to 4, characterized by, The method comprises: When at least two charging guns are detected to be inserted, control the loop contactor in which the detection resistor is located to be closed, so that the detection resistor is connected in parallel with the charging port communication loop corresponding to the vehicle end controller, and the charging port communication loop is in an open state; Control the lines through which the two vehicle end controllers and the charging pile end controller communicate to be short-circuited with each other through a contactor; Detect the loop resistance value through the resistance measuring device; According to the loop resistance value, determine the communication mode of the charging pile, and perform charging communication interaction with the charging pile according to the communication mode of the charging pile.

6. The method of claim 5, wherein, The charging communication interaction with the charging pile according to the communication mode of the charging pile comprises: Determine a target charging program matched with the communication mode of the charging pile; Perform charging communication interaction with the charging pile according to the target charging program.

7. The method of claim 5, wherein, Before the charging communication interaction with the charging pile according to the communication mode of the charging pile, the method further comprises: Control the loop contactor in which the detection resistor is located to be opened.

8. The method of claim 5, wherein, The communication mode of the charging pile is any one of the following: a master-slave type communication mode and an independent type communication mode; In the master-slave type communication mode, the charging pile has one charging pile end controller, and the two vehicle end controllers communicate with one charging pile end controller; In the independent type communication mode, the charging pile has two charging pile end controllers, and the two vehicle end controllers respectively communicate with one of the two charging pile end controllers.

9. The method of claim 8, wherein, Before the charging communication interaction with the charging pile according to the communication mode of the charging pile, the method further comprises: When the communication mode is the master-slave type communication, the method further comprises:

10. The method of claim 8, wherein, Before the charging communication interaction with the charging pile according to the communication mode of the charging pile, the method further comprises: When the communication mode is the independent type communication, the method further comprises:

11. The method of claim 8, wherein, The method for determining the communication mode of the charging pile according to the loop resistance value comprises: When the loop resistance value is in the first resistance value range, the method further comprises:

12. A control device based on the vehicle charging control circuit according to any one of claims 1 to 4, characterized by The device is used for: When at least two charging guns are detected to be inserted, the method further comprises: The two vehicle end controllers are short-circuited through the contactor; The loop resistance value is detected through the resistance value measuring device; The communication mode of the charging pile is determined according to the loop resistance value, and the charging communication interaction with the charging pile is performed according to the communication mode of the charging pile.

13. An electronic device, comprising: The computer program is stored on the computer readable storage medium and is executed by the processor to implement the method according to any one of claims 5 to 11.

14. A computer-readable storage medium, characterized in that, The computer program is stored on the computer readable storage medium and is executed by the processor to implement the method according to any one of claims 5 to 11.

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