Vehicle charging method and related product

Abstract

The invention relates to the technical field of electric vehicles, in particular to a vehicle charging method and related products. The vehicle charging method comprises the steps of determining that a first vehicle is connected with a charging pile or a second vehicle; if the first vehicle is connected with the charging pile, controlling the first vehicle to receive charging electric energy provided by the charging pile for the first vehicle; and if the first vehicle is connected with the second vehicle, controlling the first vehicle to provide charging electric energy for the second vehicle. By adopting the vehicle charging method, the convenience of direct-current charging of the vehicle can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a vehicle charging method and related products. Background Art

[0002] With the rapid development of electric vehicle technology, the use of electric vehicles in various scenarios has greatly increased. However, high-power DC charging stations for electric vehicles have not been rapidly adopted. On the one hand, in areas with few DC charging stations, users have to wait in line for a long time to charge their electric vehicles during peak charging times, which can significantly affect their travel experience. On the other hand, in areas without DC charging stations, even in extreme scenarios, charging electric vehicles is difficult, causing users to experience range anxiety and possible dangerous incidents due to low battery levels. Using low-power AC charging stations to charge electric vehicles also significantly affects the user's travel experience due to the long charging time, making it difficult to meet users' urgent charging needs in specific scenarios. Current electric vehicle technology is not convenient enough for DC charging of electric vehicles. Summary of the Invention

[0003] Based on this, it is necessary to provide a vehicle charging method and related products that can improve the convenience of DC charging of vehicles in response to the above technical problems.

[0004] In a first aspect, the present application provides a vehicle charging method, the method comprising:

[0005] Determining that the first vehicle is connected to the charging pile or the second vehicle;

[0006] If the first vehicle is connected to the charging pile, controlling the first vehicle to receive charging power provided by the charging pile to the first vehicle;

[0007] If the first vehicle is connected to the second vehicle, the first vehicle is controlled to provide charging power to the second vehicle.

[0008] In one embodiment, if the first vehicle is connected to the second vehicle, controlling the first vehicle to provide charging power to the second vehicle includes:

[0009] If the first vehicle is connected to the second vehicle, a communication establishment signal is sent to the communication controller of the first vehicle, and a ready message is sent to the communication controller, so that the communication controller calls the pile-end communication function according to the communication establishment signal and the ready message, wherein the communication establishment signal is used to instruct the communication controller to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge;

[0010] receiving a charging requirement message sent by the communication controller, wherein the charging requirement message includes charging requirement information of the second vehicle acquired by the communication controller through the pile-end communication function;

[0011] The first vehicle is controlled to provide charging power to the second vehicle according to the charging requirement information of the second vehicle.

[0012] In one embodiment, sending a communication establishment signal to a communication controller of the first vehicle includes:

[0013] A ready signal is sent to the on-board charger of the first vehicle to instruct the on-board charger to send the communication establishment signal to the communication controller.

[0014] In one embodiment, the charging requirement information includes a charging requirement voltage and a charging requirement current, and controlling the first vehicle to provide charging power to the second vehicle based on the charging requirement information of the second vehicle includes:

[0015] Sending the required charging voltage and the required charging current of the second vehicle to a motor controller of the first vehicle to instruct the motor controller to control the electric drive voltage reduction according to the required charging voltage and the required charging current, so as to adjust the discharge voltage and discharge current of the first vehicle;

[0016] When the discharge voltage reaches the required charging voltage and the discharge current reaches the required charging current, charging electric energy is provided to the second vehicle at the discharge voltage and the discharge current.

[0017] In one embodiment, the method further comprises:

[0018] receiving a fully charged message sent by the communication controller indicating that the second vehicle is fully charged;

[0019] controlling the first vehicle to stop providing charging power to the second vehicle according to the full power message;

[0020] A discharge end message is sent to the communication controller, where the discharge end message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function.

[0021] In one embodiment, if the first vehicle is connected to the second vehicle, controlling the first vehicle to provide charging power to the second vehicle includes:

[0022] If the first vehicle is connected to the second vehicle, a discharge trigger signal is received;

[0023] In response to the discharge trigger signal, entering a discharge procedure;

[0024] Based on the discharge program, the first vehicle is controlled to provide charging power to the second vehicle.

[0025] In one embodiment, determining that the first vehicle is connected to the charging station or the second vehicle includes:

[0026] receiving a cable connection signal, the cable connection signal being used to indicate that a cable has been connected to the first vehicle, the cable connection signal including a cable resistance value;

[0027] According to the cable resistance, it is determined that the first vehicle is connected to the charging pile or the second vehicle through the cable.

[0028] In one embodiment, determining, based on the cable resistance, that the first vehicle is connected to the charging pile or the second vehicle via the cable includes:

[0029] If the cable resistance falls within the charging resistance range, determining that the first vehicle is connected to the charging pile via the cable; or

[0030] If the cable resistance does not fall within the charging resistance range, it is determined that the first vehicle is connected to the second vehicle via the cable.

[0031] In a second aspect, the present application further provides a vehicle charging method, the method comprising:

[0032] receiving a communication establishment signal and a ready message from the BMC of the first vehicle, wherein the communication establishment signal is used to instruct the communication controller of the first vehicle to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge;

[0033] Calling a pile-end communication function according to the communication establishment signal and the ready message;

[0034] Acquiring charging demand information of the second vehicle through the pile-end communication function;

[0035] A charging requirement message including the charging requirement information of the second vehicle is sent to the BMC.

[0036] In one embodiment, the calling of the terminal communication function according to the communication establishment signal and the ready message includes:

[0037] According to the communication establishment signal and the ready message, the call is switched from the vehicle-side communication function to the pile-side communication function.

[0038] In one embodiment, the method further comprises:

[0039] receiving charging indication information sent by the second vehicle, where the charging indication information is used to indicate that the second vehicle is fully charged;

[0040] sending, according to the charging indication information, a full charge message to the BMC, indicating that the second vehicle is fully charged;

[0041] receiving a discharge end message from the BMC, wherein the discharge end message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function;

[0042] According to the discharge end message, the calling of the pile-side communication function is switched to the calling of the vehicle-side communication function.

[0043] In a third aspect, the present application further provides a vehicle charging device, the device comprising:

[0044] a determination module, configured to determine whether the first vehicle is connected to the charging pile or the second vehicle;

[0045] a first control module, configured to control the first vehicle to receive charging power provided by the charging pile to the first vehicle if the first vehicle is connected to the charging pile;

[0046] The second control module is configured to control the first vehicle to provide charging power to the second vehicle if the first vehicle is connected to the second vehicle.

[0047] In one embodiment, the second control module includes:

[0048] a sending unit, configured to send a communication establishment signal to a communication controller of the first vehicle and a readiness message to the communication controller if the first vehicle is connected to the second vehicle, so that the communication controller calls a pile-end communication function according to the communication establishment signal and the readiness message, wherein the communication establishment signal is used to instruct the communication controller to establish communication with the second vehicle, and the readiness message is used to instruct the first vehicle to discharge;

[0049] a first receiving unit, configured to receive a charging requirement message sent by the communication controller, wherein the charging requirement message includes charging requirement information of the second vehicle acquired by the communication controller through the pile-end communication function;

[0050] A control unit is used to control the first vehicle to provide charging power to the second vehicle according to the charging demand information of the second vehicle.

[0051] In one embodiment, the sending unit is further configured to:

[0052] A ready signal is sent to the on-board charger of the first vehicle to instruct the on-board charger to send the communication establishment signal to the communication controller.

[0053] In one embodiment, the charging requirement information includes a charging requirement voltage and a charging requirement current, and the control unit is further configured to:

[0054] Sending the required charging voltage and the required charging current of the second vehicle to a motor controller of the first vehicle to instruct the motor controller to control the electric drive voltage reduction according to the required charging voltage and the required charging current, so as to adjust the discharge voltage and discharge current of the first vehicle;

[0055] When the discharge voltage reaches the required charging voltage and the discharge current reaches the required charging current, charging electric energy is provided to the second vehicle at the discharge voltage and the discharge current.

[0056] In one embodiment, the apparatus further comprises:

[0057] a first receiving module, configured to receive a fully charged message sent by the communication controller, indicating that the second vehicle is fully charged;

[0058] a third control module, configured to control the first vehicle to stop providing charging power to the second vehicle according to the full power message;

[0059] The first sending module is used to send a discharge end message to the communication controller, where the discharge end message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function.

[0060] In one embodiment, the second control module includes:

[0061] a second receiving unit, configured to receive a discharge trigger signal if the first vehicle is connected to the second vehicle;

[0062] a response unit, configured to enter a discharge procedure in response to the discharge trigger signal;

[0063] A control unit is used to control the first vehicle to provide charging power to the second vehicle based on the discharge program.

[0064] In one embodiment, the determining module includes:

[0065] a third receiving unit, configured to receive a cable connection signal, the cable connection signal being used to indicate that a cable has been connected to the first vehicle, the cable connection signal including a cable resistance value;

[0066] A determining unit is configured to determine, based on the cable resistance, whether the first vehicle is connected to the charging pile or the second vehicle via the cable.

[0067] In one embodiment, the determining unit is further configured to:

[0068] If the cable resistance falls within the charging resistance range, determining that the first vehicle is connected to the charging pile via the cable; or

[0069] If the cable resistance does not fall within the charging resistance range, it is determined that the first vehicle is connected to the second vehicle via the cable.

[0070] In a fourth aspect, the present application further provides a vehicle charging device, the device comprising:

[0071] a second receiving module, configured to receive a communication establishment signal and a ready message from the BMC of the first vehicle, wherein the communication establishment signal is used to instruct the communication controller of the first vehicle to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge;

[0072] A first calling module is used to call the pile-end communication function according to the communication establishment signal and the ready message;

[0073] an acquisition module, configured to acquire the charging requirement information of the second vehicle through the pile-end communication function;

[0074] The second sending module is configured to send a charging requirement message including the charging requirement information of the second vehicle to the BMC.

[0075] In one embodiment, the first calling module is further configured to:

[0076] According to the communication establishment signal and the ready message, the call is switched from the vehicle-side communication function to the pile-side communication function.

[0077] In one embodiment, the apparatus further comprises:

[0078] a third receiving module, configured to receive charging indication information sent by the second vehicle, wherein the charging indication information is used to indicate that the second vehicle is fully charged;

[0079] a third sending module, configured to send a fully charged message to the BMC according to the charging indication information, indicating that the second vehicle is fully charged;

[0080] a fourth receiving module, configured to receive a discharge completion message from the BMC, wherein the discharge completion message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function;

[0081] The second calling module is used to switch from calling the pile-side communication function to calling the vehicle-side communication function according to the discharge end message.

[0082] In a fifth aspect, the present application further provides a vehicle, wherein the vehicle is a first vehicle, and the vehicle includes a BMC and a communication controller connected thereto;

[0083] The BMC is used to execute the steps of the method as shown in the first aspect or any embodiment of the first aspect, and the communication controller is used to execute the steps of the method as shown in the second aspect or any embodiment of the second aspect.

[0084] In a sixth aspect, the present application further provides a vehicle charging system, the system comprising:

[0085] The vehicle according to the fifth aspect is a first vehicle;

[0086] a second vehicle, the second vehicle being a charging vehicle requiring charging power provided by the first vehicle; and

[0087] A cable is used to connect the first vehicle and the second vehicle, and the first vehicle and the second vehicle communicate or transmit energy through the cable.

[0088] In the seventh aspect, the present application also provides a computer device, comprising: a memory and a processor, wherein the memory stores program instructions; when the program instructions are executed by the processor, the processor executes the method shown in the first aspect or any embodiment of the first aspect.

[0089] In an eighth aspect, the present application further provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium; when the computer program runs on one or more processors, the method shown in the first aspect or any embodiment of the first aspect is executed.

[0090] In the ninth aspect, the present application also provides a computer program product, which includes a computer program or instructions; when the computer program or instructions are run on a computer, the computer is enabled to execute the method shown in the first aspect or any embodiment of the first aspect.

[0091] The vehicle charging method provided in the first aspect above determines whether the first vehicle is a charging vehicle that is provided with charging power or a discharging vehicle that provides charging power during the vehicle charging process by determining whether the first vehicle is connected to a charging pile or a second vehicle. If the first vehicle is connected to the charging pile, it indicates that the first vehicle is a charging vehicle, and at this time, the first vehicle is controlled to receive the charging power provided by the charging pile to the first vehicle; if the first vehicle is connected to the second vehicle, it indicates that the first vehicle is a discharging vehicle, and at this time, the first vehicle is controlled to provide charging power to the second vehicle. The first vehicle in the above vehicle charging method can be used as a charging vehicle to receive the charging power provided by the charging pile, or as a discharging vehicle to provide charging power to the charging vehicle. Based on this, the above vehicle charging method is adopted, so that not only can the charging vehicle be charged by a high-power DC charging pile, but the charging vehicle can also be DC charged by the discharging vehicle, realizing that the vehicle can be DC charged through multiple channels, which is conducive to improving the convenience of DC charging of the vehicle.

[0092] It is understood that the vehicle charging method provided in the second aspect, the vehicle charging devices provided in the third and fourth aspects, the vehicle provided in the fifth aspect, the vehicle charging system provided in the sixth aspect, the computer device provided in the seventh aspect, the computer-readable storage medium provided in the eighth aspect, and the computer program product provided in the ninth aspect are all used to execute the method described in the first aspect or any embodiment of the first aspect of this application. Therefore, the beneficial effects that can be achieved can be referred to the beneficial effects of the corresponding methods and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments.

[0094] Figure 1 This is one of the flow charts of the vehicle charging method provided in an embodiment of the present application;

[0095] Figure 2 One of the flow charts of controlling the first vehicle to provide charging power to the second vehicle if the first vehicle is connected to the second vehicle according to an embodiment of the present application;

[0096] Figure 3 A schematic diagram of a flow chart for controlling a first vehicle to provide charging power to a second vehicle based on charging demand information of the second vehicle provided in an embodiment of the present application;

[0097] Figure 4 This is a second flow chart of the vehicle charging method provided in an embodiment of the present application;

[0098] Figure 5A second flow chart of controlling the first vehicle to provide charging power to the second vehicle if the first vehicle is connected to the second vehicle according to an embodiment of the present application;

[0099] Figure 6 A schematic diagram of a process for determining whether a first vehicle is connected to a charging station or a second vehicle according to an embodiment of the present application;

[0100] Figure 7 A schematic diagram of a first vehicle connected to a charging station via a cable provided in an embodiment of the present application;

[0101] Figure 8 A schematic diagram of a first vehicle connected to a second vehicle via a cable provided in an embodiment of the present application;

[0102] Figure 9 This is a third flow chart of the vehicle charging method provided in an embodiment of the present application;

[0103] Figure 10 This is a fourth flow chart of the vehicle charging method provided in an embodiment of the present application;

[0104] Figure 11 This is a fifth flow chart of the vehicle charging method provided in an embodiment of the present application;

[0105] Figure 12 This is one of the structural schematic diagrams of the vehicle charging device provided in an embodiment of the present application;

[0106] Figure 13 This is a second structural diagram of the vehicle charging device provided in an embodiment of the present application;

[0107] Figure 14 One of the structural schematic diagrams of a vehicle provided in an embodiment of the present application;

[0108] Figure 15 The second structural diagram of the vehicle provided in the embodiment of the present application;

[0109] Figure 16 The third structural diagram of the vehicle provided in the embodiment of the present application;

[0110] Figure 17 The fourth structural diagram of the vehicle provided in the embodiment of the present application;

[0111] Figure 18 This is one of the structural diagrams of the vehicle charging system provided in an embodiment of the present application;

[0112] Figure 19 This is a second structural diagram of the vehicle charging system provided in an embodiment of the present application;

[0113] Figure 20This is a third structural diagram of the vehicle charging system provided in an embodiment of the present application;

[0114] Figure 21 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0115] To facilitate understanding of the embodiments of the present application, a more comprehensive description of the embodiments of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the embodiments of the present application. However, the embodiments of the present application can be implemented in many different forms and are not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive disclosure of the embodiments of the present application.

[0116] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the art of the present application. The terms used herein in the description of the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application.

[0117] When used, the singular expressions "a", "an", "said", "above", "the", and "the" are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term "includes / comprising" specifies the presence of stated features, integers, steps, operations, parts, or combinations thereof, but does not exclude the possibility of the presence or addition of one or more other features, integers, steps, operations, parts, or combinations thereof.

[0118] Before discussing the embodiments of the present application in detail, the nouns involved in the embodiments of the present application are listed as follows:

[0119] Battery Manager: Battery Management Controller, BMC.

[0120] Charging vehicle: A vehicle that requires power supply equipment to provide charging energy.

[0121] Discharging vehicle: A vehicle that provides charging energy to a charging vehicle, serving as a power supply device.

[0122] Electric Vehicle Communication Controller: Electric Vehicle Communication Controller, EVCC, also known as the vehicle-side communication controller. In the embodiment of the present application, the vehicle-side communication function is regarded as the function of the vehicle-side communication controller, that is, the function of communicating with power supply equipment such as a discharging vehicle or a charging pile as a charging vehicle. Supply Equipment Communication Controller: Supply Equipment Communication Controller, SECC, also known as the pile-side communication controller. In the embodiment of the present application, the pile-side communication function is regarded as the function of the pile-side communication controller, that is, the function of communicating with power supply equipment such as a discharging vehicle or a charging pile as a charging vehicle. The pile-side communication controller and the vehicle-side communication controller can convert the standard content of the European and American Combined Charging System (CCS) DC charging into the content of the national standard GB / T27930, and exchange information with the BMC through the communication protocol conversion module to realize CCS DC charging.

[0123] Electric Vehicle Supply Equipment (EVSE), also known as a charging pile power supply controller, is mainly used to control the power supply of the charging pile in the embodiment of the present application.

[0124] Voltage Detector Module: Voltage Detector Module (VDM), in the embodiment of the present application, mainly functions as a self-test function for the DC charging port input voltage detection circuit.

[0125] DC-to-DC converter: The main function of the DC-to-DC converter in the embodiment of the present application is to convert the voltage of the DC power battery into a low-voltage 12V electricity for use in the low-voltage electrical appliances of the vehicle.

[0126] Onboard Charger: OBC, in the embodiment of the present application, mainly functions to detect whether a cable is connected and forward an unlocking signal.

[0127] The front motor controller (FMCU) is used in this embodiment to control driving and adjust discharge voltage and current. This application also refers to the "front motor controller" as the "motor controller," and the two are considered equivalent.

[0128] Vehicle to vehicle DC charging, Vehicle to Vehicle, VTOV.

[0129] like Figure 1As shown, an embodiment of the present application provides a vehicle charging method, which can be applied to a BMC of a first vehicle. The vehicle charging method includes the following steps S101 to S103.

[0130] S101, determining whether a first vehicle is connected to a charging pile or a second vehicle.

[0131] In the absence of widespread adoption of high-power DC charging stations for electric vehicles, the present invention aims to improve the convenience of DC charging for vehicles by providing additional DC charging options through a variety of different DC charging options. Based on this, the present invention provides a vehicle that can be connected to a charging station via a cable and to other vehicles via a cable. Compared to the functionality of current electric vehicles, this vehicle not only supports CCS DC charging but also supports CCS vehicle-to-vehicle DC charging. This vehicle serves as the first vehicle, and the other vehicles serve as the second vehicle. If the first vehicle is connected to the charging station, the first vehicle is a charging vehicle, and the charging station can charge the first vehicle, achieving DC charging of the vehicle. If the first vehicle is connected to the second vehicle, the second vehicle is a charging vehicle, and the first vehicle is a discharging vehicle, and the first vehicle can charge the second vehicle, achieving vehicle-to-vehicle DC charging. Based on this, by determining whether the first vehicle is connected to the charging station or the second vehicle, it can be determined whether the first vehicle is a charging vehicle receiving charging energy or a discharging vehicle providing charging energy during the vehicle charging process.

[0132] S102: If the first vehicle is connected to the charging pile, control the first vehicle to receive charging power provided by the charging pile to the first vehicle.

[0133] If the first vehicle is connected to the charging pile, it indicates that the first vehicle is used as a charging vehicle. At this time, the first vehicle is controlled to receive charging power provided by the charging pile to the first vehicle.

[0134] S103: If the first vehicle is connected to the second vehicle, control the first vehicle to provide charging power to the second vehicle.

[0135] If the first vehicle is connected to the second vehicle, it indicates that the first vehicle is used as a discharging vehicle. In this case, the first vehicle is controlled to provide charging power to the second vehicle.

[0136] In this embodiment, the first vehicle supports CCS DC charging and can act as a charging vehicle to receive charging energy from a charging pile. It also supports CCS vehicle-to-vehicle DC charging and can act as a discharging vehicle to provide charging energy to a second vehicle that supports CCS DC charging. Based on this, the above vehicle charging method enables not only charging the charging vehicle via a high-power DC charging pile, but also DC charging of the charging vehicle via a discharging vehicle. This allows for DC charging of vehicles via multiple channels, facilitating greater convenience for DC charging of vehicles. Based on this, whether in locations with few DC charging piles, or where no DC charging piles are installed, or even in extreme scenarios where it is difficult to provide charging energy to the charging vehicle via a DC charging pile, a discharging vehicle with charging energy can alternatively provide charging energy to the charging vehicle. This saves users time waiting in line for charging at a charging pile, improves charging scenarios where high-power DC charging piles are lacking, improves the user's travel experience, alleviates range anxiety, and meets users' urgent charging needs in specific scenarios.

[0137] like Figure 2 As shown, in one embodiment, the first vehicle further includes a communication controller. The above step S103, if the first vehicle is connected to the second vehicle, controls the first vehicle to provide charging power to the second vehicle, including the following steps S201 to S203.

[0138] S201: If a first vehicle is connected to a second vehicle, a communication establishment signal and a ready message are sent to the communication controller of the first vehicle, so that the communication controller invokes the pile-end communication function based on the communication establishment signal and the ready message. The communication establishment signal instructs the communication controller to establish communication with the second vehicle, and the ready message instructs the first vehicle to discharge.

[0139] The communication establishment signal is a control pilot function signal (CP signal) with a duty cycle of 5% ± 2%. The CP signal is primarily used to monitor the interaction between the charging vehicle and the power supply device. Communication using the CP signal utilizes pulse width modulation (PWM) and alternating amplitudes. The amplitude of the PWM signal represents the different status numbers of the charging gun on the cable connecting the charging vehicle. The power supply device uses the CP signal to communicate when it is ready for DC charging. The duty cycle of the PWM signal represents the maximum charging current data that the power supply device can provide. When the duty cycle is 5%, it indicates that communication between the charging vehicle and the power supply device must be established before power is supplied. Based on this, in this embodiment of the present application, the communication establishment signal is used to instruct the communication controller to establish communication with the second vehicle, that is, to instruct the first vehicle, acting as the power supply device, to establish communication with the second vehicle, acting as the charging vehicle. When the first vehicle is connected to the second vehicle, the first vehicle, acting as the discharging vehicle, will send a ready message to the communication controller to inform it that it is ready to discharge when entering the VTOV discharge procedure.

[0140] The first vehicle provided in this embodiment, which can be connected to a charging pile and other vehicles via cables, supports CCS DC charging in addition to the CCS vehicle-to-vehicle DC charging function, compared to current electric vehicles. The key factor is that the first vehicle's communication controller can not only serve as the vehicle-side communication controller of current electric vehicles, possessing vehicle-side communication functions for communicating between the charging vehicle and the power supply equipment, transmitting the first vehicle's charging demand information to the power supply equipment and receiving discharge information from the power supply equipment, but also serves as a pile-side communication controller, possessing pile-side communication functions for communicating between the power supply equipment and the charging vehicle, transmitting the first vehicle's discharge information to the second vehicle, serving as the charging vehicle, and receiving the second vehicle's charging demand information sent by the vehicle-side communication controller of the second vehicle. Based on this, if the first vehicle is connected to a second vehicle, and the first vehicle serves as the power supply equipment for the discharge vehicle, the communication controller of the first vehicle needs to invoke the pile-side communication function to communicate with the vehicle-side communication controller of the second vehicle.

[0141] Specifically, the first vehicle's BMC sends a communication establishment signal to the communication controller and a readiness message to the communication controller via the subnet. Upon receiving the communication establishment signal and the readiness message, the communication controller, based on the first vehicle's instructions to discharge and the need to establish communication with the second vehicle, invokes the charging-side communication function, enabling the first vehicle, acting as the power supply, to communicate with the second vehicle, acting as the charging vehicle. Through the charging-side communication function, the communication controller transmits the first vehicle's discharge information to the second vehicle's vehicle-side communication controller and receives information about the second vehicle's charging requirements, etc., from the second vehicle's vehicle-side communication controller.

[0142] S202: Receive a charging requirement message sent by a communication controller, where the charging requirement message includes charging requirement information of a second vehicle obtained by the communication controller through a pile-end communication function.

[0143] Specifically, the first vehicle acts as a power supply device, and the communication controller receives the charging requirement information of the second vehicle sent by the vehicle-side communication controller of the second vehicle, and sends a charging requirement message including the charging requirement information of the second vehicle to the BMC through subnet interaction, and the BMC receives the charging requirement message.

[0144] It should be noted that the charging demand message includes more than just the second vehicle's charging demand information, and the content of the communication between the first vehicle's communication controller and the second vehicle also includes more than just charging demand information and discharge information. This embodiment merely provides a targeted list. The specific content of the interaction between the communication controller and the BMC, and the specific content of the communication between the charging vehicle and the power supply equipment, can be referenced in existing DC charging technology for electric vehicles. Furthermore, the first vehicle's communication controller and the BMC exchange information via a subnet in the form of messages. The first vehicle's communication controller converts the discharge information and other content fed back by the BMC into corresponding IEC 61851 standard communication content at the charging station, which corresponds to the corresponding process, and transmits it to the vehicle-side communication controller of the second vehicle. Upon receiving the communication content sent by the first vehicle's communication controller, the second vehicle's vehicle-side communication controller similarly performs a series of charging actions and exchanges carrier communication with the first vehicle's communication controller, thereby enabling information exchange between the first vehicle's power supply equipment and the charging vehicle, and further enabling energy transfer between the power supply equipment and the charging vehicle. The communication format between the BMC and the communication controller, the communication format, communication process, and energy transfer process between the power supply equipment and the charging vehicle can also be referenced in existing DC charging technology for electric vehicles. The same applies to the subsequent embodiments, which will not be described in detail.

[0145] S203: Control the first vehicle to provide charging power to the second vehicle according to the charging demand information of the second vehicle.

[0146] Specifically, the BMC controls the modules within the first vehicle to adjust parameters such as discharge voltage and current based on the second vehicle's charging requirements, thereby controlling the first vehicle to provide charging energy to the second vehicle. For example, the BMC can control the battery pack of the first vehicle to transfer energy to the battery pack of the second vehicle.

[0147] In this embodiment, when a first vehicle and a second vehicle are connected, the first vehicle's communication controller invokes the pile-side communication function to receive the second vehicle's charging requirement information, sent by the vehicle-side communication controller of the second vehicle, thereby enabling communication between the first vehicle, serving as the power supply, and the second vehicle, serving as the charging vehicle. Furthermore, the first vehicle's battery management system (BMC) controls the first vehicle to provide charging energy to the second vehicle based on the second vehicle's charging requirement information, thereby enabling DC charging of the second vehicle by the first vehicle. The vehicle charging method of this embodiment provides an additional method for DC charging of vehicles, thereby improving the convenience of DC charging of vehicles.

[0148] In one embodiment, the first vehicle further includes an onboard charger. In step S201 , sending a communication establishment signal to the communication controller of the first vehicle includes the steps of: sending a ready signal to the onboard charger of the first vehicle to instruct the onboard charger to send a communication establishment signal to the communication controller.

[0149] Specifically, when the first vehicle is connected to the second vehicle, the first vehicle acts as the power supply device for the discharge vehicle. The BMC will first send a signal to the on-board charger indicating that the charging vehicle and the discharge vehicle are connected. Then, when the BMC enters the VTOV discharge program, the BMC will send a ready signal to the on-board charger to inform it that it is ready to discharge. The on-board charger will then be instructed to perform CP signal communication upon receiving the above two signals, that is, to send a communication establishment signal to the communication controller to instruct the communication controller to establish communication between the first vehicle and the second vehicle before power is supplied. At this time, the on-board charger sends the communication establishment signal and enters the VTOV discharge program. The on-board charger also sends a feedback signal to the BMC to indicate that the on-board charger has entered the discharge state of CCS vehicle-to-vehicle DC charging.

[0150] In this embodiment, the BMC of the first vehicle instructs the on-board charger to send a communication establishment signal to the communication controller to instruct the communication controller to establish communication between the first vehicle and the second vehicle before power is supplied, providing a signal instruction for the communication controller to call the pile-end communication function, and providing a signal basis for the first vehicle to communicate with the second vehicle.

[0151] like Figure 3As shown, in one embodiment, the charging requirement information includes a charging requirement voltage and a charging requirement current, and the first vehicle further includes a motor controller. The above step S203, controlling the first vehicle to provide charging power to the second vehicle based on the charging requirement information of the second vehicle, includes the following steps S301 to S302.

[0152] S301, sending the charging requirement voltage and charging requirement current of the second vehicle to the motor controller of the first vehicle to instruct the motor controller to control the electric drive voltage reduction according to the charging requirement voltage and charging requirement current to adjust the discharge voltage and discharge current of the first vehicle.

[0153] The BMC sends the second vehicle's charging requirement voltage as the voltage reduction target value to the front motor controller, instructing the front motor controller to control the electric drive voltage reduction based on the charging requirement voltage and charging requirement current, so as to adjust the discharge voltage of the first vehicle and simultaneously adjust the discharge current. Specifically, the front motor controller controls the electric drive voltage reduction based on the voltage reduction target value, and the electric drive controls the energy value output by the motor inductor to the second vehicle based on the voltage reduction target value, so that the output energy value matches the voltage reduction target value. Among them, one interface of the motor inductor is connected to the second vehicle. The motor inductor in the front motor controller is also connected to the battery pack of the first vehicle, and the battery pack provides energy to the motor inductor. During the process of the motor inductor outputting energy to the second vehicle, the battery pack continues to provide energy to the motor inductor to maintain the energy value output by the motor inductor. That is, when the discharge voltage of the first vehicle is equal to the charging requirement voltage of the second vehicle, the first vehicle can discharge continuously and stably. Taking into account the load of the second vehicle, the charging requirement current of the second vehicle matches the charging requirement voltage. If the discharge voltage of the first vehicle is adjusted to the required charging voltage of the second vehicle and the load of the second vehicle remains unchanged, the discharge current provided by the first vehicle will also be adjusted to the required charging current. The discharge current is adjusted in response to the discharge voltage. The required charging current sent by the BMC to the front motor controller serves as a reference value for adjusting the discharge current.

[0154] S302 : When the discharge voltage reaches the required charging voltage and the discharge current reaches the required charging current, charging power is provided to the second vehicle at the discharge voltage and the discharge current.

[0155] In this embodiment, the BMC controls the electric drive voltage reduction via the front motor controller based on the second vehicle's charging requirements. This allows real-time adjustments to the first vehicle's discharge voltage, discharge current, and other parameters to meet the second vehicle's charging requirements. The first vehicle then provides charging energy to the second vehicle at a discharge voltage and current that meet the second vehicle's charging requirements, facilitating efficient vehicle-to-vehicle DC charging.

[0156] like Figure 4As shown, in one embodiment, the vehicle charging method further includes the following steps S401 to S408. Steps S401 to S405 correspond one-to-one to steps S101 to S102 and S201 to S203 in the aforementioned embodiment. For the detailed discussion of steps S401 to S405 in this embodiment, please refer to the aforementioned embodiment.

[0157] S401: Determine whether the first vehicle is connected to a charging pile or a second vehicle.

[0158] S402: If the first vehicle is connected to the charging pile, control the first vehicle to receive charging power provided by the charging pile to the first vehicle.

[0159] S403: If the first vehicle is connected to the second vehicle, a communication establishment signal and a ready message are sent to the communication controller of the first vehicle, so that the communication controller invokes the pile-end communication function based on the communication establishment signal and the ready message. The communication establishment signal instructs the communication controller to establish communication with the second vehicle, and the ready message instructs the first vehicle to discharge.

[0160] S404: Receive a charging requirement message sent by the communication controller, where the charging requirement message includes charging requirement information of the second vehicle obtained by the communication controller through the pile-end communication function.

[0161] S405 , controlling the first vehicle to provide charging power to the second vehicle according to the charging demand information of the second vehicle.

[0162] S406: Receive a fully charged message sent by the communication controller to indicate that the second vehicle is fully charged.

[0163] Specifically, if the second vehicle's charging needs have been met and no further charging is required, the second vehicle's vehicle-side communication controller sends a charging indication message indicating that the vehicle is fully charged to the first vehicle's communication controller. The first vehicle's communication controller receives the charging indication message via the charging terminal communication function and, based on the charging indication message, sends a fully charged message to the BMC indicating that the second vehicle is fully charged. The BMC then receives the fully charged message.

[0164] S407: According to the full power message, the first vehicle is controlled to stop providing charging power to the second vehicle.

[0165] Exemplarily, the BMC of the first vehicle controls the battery pack to stop transmitting energy to the battery pack of the second vehicle based on the full power message.

[0166] S408 , sending a discharge completion message to the communication controller, where the discharge completion message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function.

[0167] The aforementioned embodiments discussed that the communication controller of the first vehicle can not only serve as a vehicle-side communication controller for current electric vehicles, possessing vehicle-side communication functions for communicating between a charging vehicle and a power supply device, transmitting the first vehicle's charging demand information to the power supply device and receiving discharge information from the power supply device, but can also serve as a pile-side communication controller, possessing pile-side communication functions for communicating between the power supply device and the charging vehicle, transmitting the first vehicle's discharge information to a second vehicle, serving as a charging vehicle, and receiving the second vehicle's charging demand information sent by the vehicle-side communication controller of the second vehicle. Based on this, in this embodiment, when the communication controller of the first vehicle is not in operating mode and is not communicating, it defaults to serving as a vehicle-side communication controller, possessing vehicle-side communication functions for communicating between a charging vehicle and a power supply device. When entering operating mode and establishing communication, the communication controller of the first vehicle selects whether to continue the vehicle-side communication function or switch from invoking the vehicle-side communication function to invoking the pile-side communication function, thereby obtaining the pile-side communication function, depending on whether the first vehicle is a charging vehicle or a discharging vehicle.

[0168] Specifically, when the first vehicle stops charging the second vehicle, the BMC sends a discharge completion message to the communication controller, informing it that power supply has ended. The communication controller can then stop communicating with the vehicle-side communication controller of the second vehicle via the charging station communication function. At this point, the communication controller stops calling the charging station communication function and switches from calling the charging station communication function to calling the vehicle-side communication function, returning to the default functional state after the communication controller stops communicating.

[0169] In this embodiment, when a first vehicle stops charging a second vehicle, the communication controller of the first vehicle switches from invoking the charging pile-side communication function to invoking the vehicle-side communication function, returning to the default functional state after the communication controller stops communicating. This causes the first vehicle to switch from implementing CCS vehicle-to-vehicle DC charging to implementing CCS DC charging, returning to its default state as a charging vehicle after the first vehicle stops discharging as a power supply device. The vehicle charging method of this embodiment achieves a functional transition between the CCS vehicle-to-vehicle DC charging function and the CCS DC charging function of the first vehicle by implementing a functional transition between the charging pile-side communication function and the vehicle-side communication function of the communication controller. The next time the first vehicle is determined to be connected to a second vehicle or charging pile, a different function can be selected based on demand, thereby meeting the user's functional requirements for DC charging or DC discharging of the vehicle in different scenarios.

[0170] like Figure 5 As shown, in one embodiment, in the above step S103, if the first vehicle is connected to the second vehicle, controlling the first vehicle to provide charging power to the second vehicle includes the following steps S501 to S503.

[0171] S501: If the first vehicle is connected to the second vehicle, a discharge trigger signal is received.

[0172] The discharge trigger signal may be a snow button signal that lasts for a predetermined period of time, such as 5 seconds, with the main purpose of triggering the BMC to enter the discharge program. The type of the discharge trigger signal is not limited in this embodiment.

[0173] S502, in response to a discharge trigger signal, entering a discharge procedure.

[0174] S503: Based on the discharge program, control the first vehicle to provide charging power to the second vehicle.

[0175] Specifically, when a first vehicle is connected to a second vehicle, the BMC waits for a discharge trigger signal instructing the BMC to enter the VTOV DC discharge process. Upon receiving the discharge trigger signal, the BMC responds to the discharge trigger signal and enters the VTOV DC discharge process. Based on the discharge process, the BMC sends a series of signals to the first vehicle's onboard charger, communication controller, and other modules to control the first vehicle to provide charging energy to the second vehicle.

[0176] In this embodiment, after the first vehicle and the second vehicle are connected, a discharge trigger signal is given to instruct the BMC of the first vehicle to enter the VTOV DC discharge program and control the first vehicle to provide charging power to the second vehicle. This is conducive to triggering the first vehicle to realize the CCS vehicle-to-vehicle DC charging function, and the discharge is controlled by the discharge trigger signal to start, which is conducive to ensuring the safety of the first vehicle supplying power to the second vehicle.

[0177] like Figure 6 As shown, in one embodiment, the above step S101, determining that the first vehicle is connected to the charging pile or the second vehicle, includes the following steps S601 to S602.

[0178] S601: Receive a cable connection signal, where the cable connection signal is used to indicate that a cable has been connected to a first vehicle, and the cable connection signal includes a cable resistance value.

[0179] One end of the cable is a vehicle plug, which forms a coupler with the vehicle socket at the vehicle charging port, connecting the cable to the vehicle. If the charging station is connected to a first vehicle via the cable, and the charging station is charging the first vehicle, the vehicle plug at one end of the cable is a charging gun. The charging gun of the cable connecting the charging station to the first vehicle is considered a non-standard gun, and when connecting a second vehicle to the first vehicle, the gun connected to the first vehicle is considered a standard gun. The cable resistance refers to the value of the series equivalent resistance in the vehicle plug of the cable, that is, the resistance of the series equivalent resistance of the cable connecting to the non-standard gun or the standard gun of the first vehicle.

[0180] Specifically, the onboard charger of the first vehicle recognizes that a cable is connected to the charging port of the first vehicle, identifies the cable resistance of the cable, and sends a cable connection signal including the cable resistance to the BMC.

[0181] S602: Determine, based on the cable resistance, whether the first vehicle is connected to the charging pile or the second vehicle via the cable.

[0182] In one embodiment, the above step S602, determining that the first vehicle is connected to the charging pile or the second vehicle via a cable based on the cable resistance, includes the steps of: if the cable resistance falls within the charging resistance range, determining that the first vehicle is connected to the charging pile via the cable; or if the cable resistance does not fall within the charging resistance range, determining that the first vehicle is connected to the second vehicle via the cable.

[0183] Specifically, the charging resistance range refers to the cable resistance range of the non-standard gun of the charging pile cable. If the cable resistance of the gun connected to the first vehicle falls within the charging resistance range, it indicates that the gun is a non-standard gun, that is, the first vehicle is connected to the charging pile through a cable. At this time, it can be determined that the first vehicle is the charging vehicle provided with charging power during the vehicle charging process. Figure 7 As shown, Figure 7 This is a schematic diagram of a first vehicle connected to a charging pile via a cable. The charging pile forms a coupler with the vehicle plug at one end of the cable and the vehicle socket at the charging port of the first vehicle to achieve a physical connection with the first vehicle. Furthermore, the charging pile and the first vehicle achieve communication and energy transfer through the cable.

[0184] If the cable resistance of the gun connected to the first vehicle does not fall within the charging resistance range, it indicates that the gun is a standard gun, that is, the first vehicle is connected to the second vehicle via a cable. At this time, it can be determined that the first vehicle is a discharge vehicle providing charging power during the vehicle charging process. If the BMC determines that the first vehicle is connected to the second vehicle via a cable, it sends a signal indicating that the charging vehicle and the discharge vehicle are connected to the vehicle charger for signal feedback. Figure 8 As shown, Figure 8 This is a schematic diagram of a first vehicle connected to a second vehicle via a cable. The cable connecting the first vehicle and the second vehicle can be called a VTOV conductive connecting cable. The two ends of the VTOV conductive connecting cable are respectively connected to the charging port of the first vehicle and the charging port of the second vehicle to achieve a physical connection between the first vehicle and the second vehicle. The first vehicle and the second vehicle communicate and transmit energy through the VTOV conductive connecting cable.

[0185] In this embodiment, the BMC determines whether the cable resistance of the cable connected to the charging port of the first vehicle falls within the charging resistance range to determine whether the first vehicle is connected to the charging pile via the cable or to the second vehicle. This helps to further determine whether the first vehicle is a charging vehicle or a discharging vehicle, and further helps to determine whether the first vehicle implements the CCS DC charging function or the CCS vehicle-to-vehicle DC charging function, so as to meet the user's functional requirements for DC charging or DC discharging of vehicles in different scenarios.

[0186] In one embodiment, in step S102, if the first vehicle is connected to the charging pile, controlling the first vehicle to receive charging power provided by the charging pile to the first vehicle includes the following steps:

[0187] If the first vehicle is connected to the charging pile, a demand message including the first vehicle's charging demand is sent to the communication controller that calls the vehicle-side communication function, so as to instruct the communication controller to send the first vehicle's charging demand to the charging pile;

[0188] Receive charging power provided by the charging pile to meet the charging demand of the first vehicle.

[0189] Specifically, if the first vehicle is connected to the charging pile, it indicates that the first vehicle is a charging vehicle. The communication controller of the first vehicle invokes the default vehicle-side communication function to communicate with the charging pile's pile-side communication controller. The charging information sent by the BMC is converted into European standard IEC 61851 communication content and transmitted to the charging pile. The CCS DC charging standard content sent by the charging pile is converted into a specific message and interacts with the BMC through the subnet. The BMC sends a request message including the first vehicle's charging requirements to the communication controller that invoked the vehicle-side communication function through the subnet, instructing the communication controller to send the first vehicle's charging requirements to the charging pile. The communication controller then transmits the first vehicle's charging requirements to the pile-side communication controller of the charging pile. The charging pile adjusts the discharge current and discharge voltage based on the first vehicle's charging requirements to provide charging energy to the first vehicle at the discharge current and discharge voltage required by the first vehicle. The BMC then controls the first vehicle to receive the charging energy provided by the charging pile.

[0190] In this embodiment, if the first vehicle is connected to the charging pile, the first vehicle acts as a charging vehicle and receives the charging power provided by the charging pile. The communication controller calls the default vehicle-side communication function, and the first vehicle implements the default CCS DC charging function. The first vehicle and the vehicle charging method in this embodiment, while enriching and expanding the functions of the communication controller and the first vehicle, do not affect the implementation of the original functions of the communication controller and the first vehicle in current electric vehicle technology.

[0191] like Figure 9As shown, the embodiment of the present application further provides a vehicle charging method, which can be applied to a communication controller of a first vehicle, wherein the first vehicle also includes a BMC. The vehicle charging method includes the following steps S901 to S904.

[0192] S901: Receive a communication establishment signal and a ready message from the BMC of a first vehicle. The communication establishment signal is used to instruct the communication controller of the first vehicle to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge.

[0193] S902: Call the pile-side communication function according to the communication establishment signal and the ready message.

[0194] S903, obtaining charging requirement information of the second vehicle through the charging terminal communication function.

[0195] S904: Send a charging requirement message including the charging requirement information of the second vehicle to the BMC.

[0196] The communication controller of the first vehicle can not only serve as the vehicle-side communication controller of current electric vehicles, having the vehicle-side communication function of communicating with the power supply equipment as a charging vehicle, transmitting the charging demand information of the first vehicle to the power supply equipment, and receiving the discharge information of the power supply equipment, etc., but can also serve as a pile-side communication controller, having the pile-side communication function of communicating with the power supply equipment as a charging vehicle, transmitting the discharge information of the first vehicle to the second vehicle as a charging vehicle, and receiving the charging demand information of the second vehicle sent by the vehicle-side communication controller of the second vehicle, etc. Based on this, if the first vehicle is connected to the second vehicle, and the first vehicle serves as the power supply equipment of the discharging vehicle, the communication controller of the first vehicle needs to call the pile-side communication function to communicate with the vehicle-side communication controller of the second vehicle.

[0197] Specifically, if a first vehicle is connected to a second vehicle, with the first vehicle acting as a power supply, the first vehicle's battery management (BMC) sends a communication establishment signal to the communication controller and a ready message to the communication controller via the subnet. Upon receiving the communication establishment signal and ready message, the communication controller, based on the first vehicle's instructions to discharge and the need to establish communication with the second vehicle, invokes the pile-side communication function, enabling the first vehicle, acting as the power supply, to communicate with the second vehicle, acting as the charging vehicle. Furthermore, the communication controller receives the communication establishment signal and ready message from the BMC and, based on the communication establishment signal and ready message, invokes the pile-side communication function. Furthermore, the communication controller receives the second vehicle's charging requirement information from the vehicle-side communication controller via the pile-side communication function, and sends a charging requirement message including the second vehicle's charging requirement information to the BMC via the subnet. This allows the BMC to control the first vehicle to provide charging power to the second vehicle based on the second vehicle's charging requirement information.

[0198] In this embodiment, when a first vehicle connects to a second vehicle, the first vehicle's communication controller invokes the charging station communication function to receive the second vehicle's charging requirement information, sent by the second vehicle's vehicle-side communication controller. This enables communication between the first vehicle, acting as a power supply, and the second vehicle, acting as a charging vehicle. Furthermore, the first vehicle's battery management system (BMC) controls the first vehicle to provide charging energy to the second vehicle based on the second vehicle's charging requirement information, thereby enabling DC charging of the second vehicle by the first vehicle. The vehicle charging method of this embodiment, through vehicle-to-vehicle DC charging, adds a new method for DC charging of vehicles, thereby improving the convenience of DC charging of vehicles.

[0199] In one embodiment, in the above step S901 , receiving the communication establishment signal from the BMC of the first vehicle includes the step of: receiving the communication establishment signal sent by the on-board charger under the instruction of the BMC of the first vehicle sending the ready signal.

[0200] Specifically, when the first vehicle is connected to the second vehicle, the first vehicle acts as the power supply device for the discharge vehicle. The BMC will first send a signal to the onboard charger indicating that the charging and discharging vehicles are connected. Then, when the BMC enters the VTOV discharge program, the BMC will send a ready signal to the onboard charger to inform it that it is ready to discharge. Then, upon receiving the above two signals, the onboard charger will perform CP signal communication, that is, send a communication establishment signal to the communication controller to instruct the communication controller to establish communication between the first and second vehicles before supplying power. At this time, the onboard charger sends the communication establishment signal to the communication controller. Then, the communication controller receives the communication establishment signal sent by the onboard charger.

[0201] In this embodiment, the on-board charger sends a communication establishment signal to the communication controller under the instruction of the BMC of the first vehicle to instruct the communication controller to establish communication between the first vehicle and the second vehicle before power is supplied, providing a signal instruction for the communication controller to call the pile-end communication function, and providing a signal basis for the first vehicle to communicate with the second vehicle.

[0202] In one embodiment, the above step S902, calling the pile-side communication function according to the communication establishment signal and the ready message, includes the following steps: switching from calling the vehicle-side communication function to calling the pile-side communication function according to the communication establishment signal and the ready message.

[0203] Among them, when the communication controller of the first vehicle has not entered the working mode and has not communicated, it defaults to being a vehicle-side communication controller, and has the vehicle-side communication function of communicating between the charging vehicle and the power supply equipment. When entering the working mode and establishing communication, it is determined whether the first vehicle is a charging vehicle or a discharging vehicle, and whether to continue to have the vehicle-side communication function or to switch from calling the vehicle-side communication function to calling the pile-side communication function, so as to have the pile-side communication function.

[0204] Specifically, the communication controller that defaults to being a vehicle-side communication controller and has vehicle-side communication functions, when entering the working mode and needs to establish communication with the second vehicle, switches from calling the vehicle-side communication function to calling the pile-side communication function according to the communication establishment signal and the ready message, so as to realize the communication between the first vehicle as a power supply device and the second vehicle as a charging vehicle.

[0205] The vehicle charging method of this embodiment implements a functional conversion between the vehicle-side communication function and the charging pile-side communication function of the communication controller, thereby implementing a functional conversion between the CCS DC charging function of the first vehicle and the CCS vehicle-to-vehicle DC charging function. This facilitates meeting the user's functional requirements for DC charging or DC discharging of the vehicle in different scenarios. When the user's vehicle requires charging, the communication controller does not need to perform a functional conversion and can continue to call the default vehicle-side communication function to communicate with the charging pile's charging pile communication controller, enabling the first vehicle to implement the CCS DC charging function and receive charging power from the charging pile. When the user's vehicle requires discharging, the communication controller switches from calling the default vehicle-side communication function to calling the charging pile-side communication function, communicating with the vehicle-side communication controller of the charging vehicle, enabling the first vehicle to switch to implementing the CCS vehicle-to-vehicle DC charging function and provide charging power to the charging vehicle. The vehicle charging method of this embodiment facilitates the convenience of DC charging of vehicles and can be applied to scenarios requiring vehicle recharging, such as road rescue operations.

[0206] like Figure 10As shown, in one embodiment, the vehicle charging method further includes the following steps S1001 to S1008. Steps S1001 to S1004 correspond one-to-one to steps S901 to S904 in the aforementioned embodiment. For the detailed discussion of steps S1001 to S1004 in this embodiment, reference can be made to the aforementioned embodiment.

[0207] S1001: Receive a communication establishment signal and a ready message from the BMC of a first vehicle. The communication establishment signal is used to instruct the communication controller of the first vehicle to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge.

[0208] S1002: Call the pile-end communication function according to the communication establishment signal and the ready message.

[0209] S1003, obtaining charging requirement information of the second vehicle through the charging terminal communication function.

[0210] S1004: Send a charging requirement message including charging requirement information of the second vehicle to the BMC.

[0211] S1005: Receive charging indication information sent by the second vehicle, where the charging indication information is used to indicate that the second vehicle is fully charged.

[0212] S1006: Send a fully charged message to the BMC according to the charging instruction information, indicating that the second vehicle is fully charged.

[0213] Specifically, if the second vehicle's charging demand has been met and no further charging is required, the vehicle-side communication controller of the second vehicle sends charging indication information indicating that it is fully charged to the communication controller of the first vehicle. The communication controller of the first vehicle receives the charging indication information through the pile-side communication function, and sends a full power message indicating that the second vehicle is fully charged to the BMC based on the charging indication information, so as to instruct the BMC to control the first vehicle to stop providing charging power to the second vehicle.

[0214] S1007 , receiving a discharge completion message from the BMC, where the discharge completion message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function.

[0215] S1008, switching from calling the pile-side communication function to calling the vehicle-side communication function according to the discharge end message.

[0216] Specifically, when the first vehicle stops charging the second vehicle, the BMC sends a discharge completion message to the communication controller, informing the communication controller that power supply has ended. The communication controller can then stop communicating with the vehicle-side communication controller of the second vehicle via the pile-side communication function. The communication controller then receives the discharge completion message from the BMC and, based on the discharge completion message, stops calling the pile-side communication function and switches from calling the pile-side communication function to calling the vehicle-side communication function, returning to the default functional state after the communication controller stops communication.

[0217] In this embodiment, when a first vehicle stops charging a second vehicle, the communication controller of the first vehicle switches from invoking the charging pile-side communication function to invoking the vehicle-side communication function, returning to the default functional state after the communication controller stops communicating. This causes the first vehicle to switch from implementing CCS vehicle-to-vehicle DC charging to implementing CCS DC charging, returning to its default state as a charging vehicle after the first vehicle stops discharging as a power supply device. The vehicle charging method of this embodiment achieves a functional transition between the CCS vehicle-to-vehicle DC charging function and the CCS DC charging function of the first vehicle by implementing a functional transition between the charging pile-side communication function and the vehicle-side communication function of the communication controller. The next time the first vehicle is determined to be connected to a second vehicle or charging pile, a different function can be selected based on demand, thereby meeting the user's functional requirements for DC charging or DC discharging of the vehicle in different scenarios.

[0218] like Figure 11 As shown, in one embodiment, the vehicle charging method is applied to a first vehicle, and the first vehicle includes a BMC, a communication controller, an on-board charger, and a motor controller; the on-board charging method includes the following steps S1101 to S1123.

[0219] First, the BMC performs the following steps:

[0220] S1101: Receive a cable connection signal, where the cable connection signal is used to indicate that a cable has been connected to a first vehicle, and the cable connection signal includes a cable resistance value.

[0221] S1102: If the cable resistance falls within the charging resistance range, determine that the first vehicle is connected to the charging pile via the cable.

[0222] S1103: If the first vehicle is connected to the charging pile, control the first vehicle to receive charging power provided by the charging pile to the first vehicle.

[0223] S1104: If the cable resistance does not fall within the charging resistance range, determine that the first vehicle is connected to the second vehicle via the cable.

[0224] S1105: If the first vehicle is connected to the second vehicle, a discharge trigger signal is received.

[0225] S1106, in response to the discharge trigger signal, enter the discharge program.

[0226] S1107 , based on the discharge procedure, sending a ready signal to the onboard charger to instruct the onboard charger to send a communication establishment signal to the communication controller.

[0227] S1108: Based on the discharge program, a ready message is sent to the communication controller, so that the communication controller invokes the pile-end communication function according to the communication establishment signal and the ready message. The communication establishment signal is used to instruct the communication controller to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge.

[0228] Then, the communication controller performs the following steps:

[0229] S1109: Receive a communication establishment signal sent by the on-board charger under the instruction of the BMC sending a ready signal.

[0230] S1110: Receive a ready message from the BMC.

[0231] S1111: Based on the communication establishment signal and the ready message, the vehicle-side communication function is switched to the pile-side communication function.

[0232] S1112: Obtain charging requirement information of the second vehicle through the charging terminal communication function. The charging requirement information includes a charging requirement voltage and a charging requirement current.

[0233] S1113: Send a charging requirement message including the charging requirement information of the second vehicle to the BMC.

[0234] Then, the BMC performs the following steps:

[0235] S1114: Receive a charging requirement message sent by the communication controller.

[0236] S1115 , sending the charging requirement voltage and charging requirement current of the second vehicle to the motor controller to instruct the motor controller to control the electric drive voltage reduction according to the charging requirement voltage and charging requirement current to adjust the discharge voltage and discharge current of the first vehicle.

[0237] S1116 , when the discharge voltage reaches the required charging voltage and the discharge current reaches the required charging current, providing charging power to the second vehicle with the discharge voltage and the discharge current.

[0238] Furthermore, the communication controller performs the following steps:

[0239] S1117: Receive charging instruction information sent by the second vehicle. The charging instruction information is used to indicate that the second vehicle is fully charged.

[0240] S1118: Send a fully charged message to the BMC according to the charging instruction information, indicating that the second vehicle is fully charged.

[0241] Furthermore, the BMC performs the following steps:

[0242] S1119: Receive a power full message sent by the communication controller.

[0243] S1120: Based on the full power message, control the first vehicle to stop providing charging power to the second vehicle.

[0244] S1121: Send a discharge completion message to the communication controller. The discharge completion message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function.

[0245] Finally, the communication controller performs the following steps:

[0246] S1122: Receive a discharge completion message from the BMC.

[0247] S1123, according to the discharge end message, switching from calling the pile-side communication function to calling the vehicle-side communication function.

[0248] In this embodiment, the first vehicle can be connected to either a charging pile or a second vehicle. The first vehicle's communication controller can not only function as a vehicle-side communication controller for current electric vehicles, possessing vehicle-side communication functions for communicating between the charging vehicle and the power supply equipment, transmitting the first vehicle's charging demand information to the power supply equipment and receiving discharge information from the power supply equipment, but can also function as a pile-side communication controller, possessing pile-side communication functions for communicating between the power supply equipment and the charging vehicle, transmitting the first vehicle's discharge information to the second vehicle, serving as the charging vehicle, and receiving charging demand information from the second vehicle's vehicle-side communication controller. The first vehicle has CCS DC charging functionality by default, and the vehicle-side communication function is invoked by default after the communication controller stops communicating.

[0249] If the first vehicle is connected to the second vehicle, the first vehicle is a discharging vehicle. By switching the communication controller of the first vehicle from the default call of the vehicle-side communication function to the call of the pile-side communication function, the charging requirement information of the second vehicle sent by the vehicle-side communication controller of the second vehicle is received through the pile-side communication function, thereby enabling the first vehicle as a power supply device to communicate with the second vehicle as a charging vehicle. Furthermore, the BMC of the first vehicle controls the first vehicle to provide charging power to the second vehicle based on the charging requirement information of the second vehicle, thereby achieving DC charging of the second vehicle by the first vehicle, that is, realizing the CCS vehicle-to-vehicle DC charging function. The vehicle charging method of this embodiment adds a way to perform DC charging on the vehicle, which is conducive to improving the convenience of DC charging of the vehicle.

[0250] When the first vehicle stops charging the second vehicle, the communication controller of the first vehicle switches from invoking the charging pile communication function to invoking the vehicle communication function, returning to the default functional state after the communication controller stops communicating. This causes the first vehicle to switch from implementing CCS vehicle-to-vehicle DC charging to implementing CCS DC charging, returning to the default state of the charging vehicle after the first vehicle stops discharging as a power supply device. The vehicle charging method of this embodiment achieves a functional conversion between the CCS vehicle-to-vehicle DC charging function and the CCS DC charging function of the first vehicle by implementing the functional conversion between the charging pile communication function and the vehicle communication function of the communication controller. The next time the first vehicle is determined to be connected to a second vehicle or charging pile, a different function can be selected again based on demand, which is conducive to meeting the user's functional requirements for DC charging or DC discharging of vehicles in different scenarios.

[0251] If the first vehicle is connected to the charging station, the first vehicle acts as a charging vehicle and receives charging energy from the charging station. The communication controller continues to invoke the default vehicle-side communication function, and the first vehicle implements the default CCS DC charging function. The first vehicle and vehicle charging method of this embodiment, while enriching and expanding the functions of the communication controller and the first vehicle, do not affect the original functions of the communication controller and the first vehicle in current electric vehicle technology.

[0252] The above-mentioned vehicle charging method not only enables charging vehicles through high-power DC charging piles, but also allows charging vehicles to be charged by DC through discharge vehicles. This allows DC charging of vehicles through multiple channels, which is conducive to improving the convenience of DC charging of vehicles. Based on this, whether in places with few DC charging piles, or in places where no DC charging piles are set up, or even in extreme scenarios, if it is difficult to provide charging power to charging vehicles through DC charging piles, it is also possible to choose to provide charging power to charging vehicles through discharge vehicles with charging power. This is conducive to saving users time waiting in line for charging piles, and is conducive to improving the charging scenarios where there are no high-power DC charging piles. It is also conducive to improving users' travel experience, alleviating users' mileage anxiety, and meeting users' urgent charging needs in specific scenarios.

[0253] like Figure 12 As shown, the embodiment of the present application also provides a vehicle charging device 1200, which includes a determination module 1201, a first control module 1202, and a second control module 1203. The determination module 1201 is used to determine whether the first vehicle is connected to the charging pile or the second vehicle. The first control module 1202 is used to control the first vehicle to receive the charging power provided by the charging pile to the first vehicle if the first vehicle is connected to the charging pile. The second control module 1203 is used to control the first vehicle to provide charging power to the second vehicle if the first vehicle is connected to the second vehicle.

[0254] In one embodiment, the second control module 1203 includes a sending unit, a first receiving unit, and a control unit. The sending unit is used to send a communication establishment signal to the communication controller of the first vehicle and a ready message to the communication controller if the first vehicle is connected to the second vehicle, so that the communication controller calls the pile-end communication function according to the communication establishment signal and the ready message, wherein the communication establishment signal is used to instruct the communication controller to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge. The first receiving unit is used to receive a charging requirement message sent by the communication controller, and the charging requirement message includes the charging requirement information of the second vehicle obtained by the communication controller through the pile-end communication function. The control unit is used to control the first vehicle to provide charging power to the second vehicle according to the charging requirement information of the second vehicle.

[0255] In one embodiment, the sending unit is further configured to send a ready signal to an onboard charger of the first vehicle to instruct the onboard charger to send a communication establishment signal to the communication controller.

[0256] In one embodiment, the charging requirement information includes a charging requirement voltage and a charging requirement current, and the above-mentioned control unit is further used to: send the charging requirement voltage and charging requirement current of the second vehicle to the motor controller of the first vehicle to instruct the motor controller to control the electric drive voltage reduction according to the charging requirement voltage and the charging requirement current to adjust the discharge voltage and discharge current of the first vehicle; when the discharge voltage reaches the charging requirement voltage and the discharge current reaches the charging requirement current, provide charging power to the second vehicle with the discharge voltage and discharge current.

[0257] In one embodiment, the vehicle charging device 1200 further includes a first receiving module, a third control module, and a first sending module. The first receiving module is configured to receive a fully charged power message sent by the communication controller, indicating that the second vehicle is fully charged. The third control module is configured to control the first vehicle to stop providing charging power to the second vehicle based on the fully charged power message. The first sending module is configured to send a discharge completion message to the communication controller, which instructs the communication controller to switch from invoking the charging terminal communication function to invoking the vehicle-side communication function.

[0258] In one embodiment, the second control module 1203 includes a second receiving unit, a response unit, and a control unit. The second receiving unit is configured to receive a discharge trigger signal when the first vehicle is connected to the second vehicle. The response unit is configured to initiate a discharge process in response to the discharge trigger signal. The control unit is configured to control the first vehicle to provide charging energy to the second vehicle based on the discharge process.

[0259] In one embodiment, the determination module 1201 includes a third receiving unit and a determination unit. The third receiving unit is configured to receive a cable connection signal, the cable connection signal indicating that a cable is connected to the first vehicle, the cable connection signal including a cable resistance. The determination unit is configured to determine, based on the cable resistance, whether the first vehicle is connected to the charging station or the second vehicle via a cable.

[0260] In one embodiment, the determination unit is further configured to: determine that the first vehicle is connected to the charging pile via a cable if the cable resistance falls within the charging resistance range; or determine that the first vehicle is connected to the second vehicle via a cable if the cable resistance does not fall within the charging resistance range.

[0261] For the explanation of each term, please refer to the relevant description in the aforementioned method embodiment and will not be elaborated here.

[0262] It should be noted that the specific execution process of the above vehicle charging device 1200 can be found in Figures 1 to 8 、 Figure 11 The detailed description of the illustrated embodiment will not be repeated here.

[0263] Each module in the vehicle charging device 1200 may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in hardware form, or may be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0264] like Figure 13 As shown, an embodiment of the present application further provides a vehicle charging device 1300, which includes a second receiving module 1301, a first calling module 1302, an acquisition module 1303, and a second sending module 1304. The second receiving module 1301 is used to receive a communication establishment signal and a ready message from the BMC of the first vehicle. The communication establishment signal is used to instruct the communication controller of the first vehicle to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge. The first calling module 1302 is used to call the pile-end communication function according to the communication establishment signal and the ready message. The acquisition module 1303 is used to obtain the charging requirement information of the second vehicle through the pile-end communication function. The second sending module 1304 is used to send a charging requirement message including the charging requirement information of the second vehicle to the BMC.

[0265] In one embodiment, the first calling module 1302 is further configured to switch from calling the vehicle-side communication function to calling the pile-side communication function according to the communication establishment signal and the ready message.

[0266] In one embodiment, the vehicle charging device 1300 further includes a third receiving module, a third sending module, a fourth receiving module, and a second calling module. The third receiving module is configured to receive charging indication information sent by the second vehicle, the charging indication information being used to indicate that the second vehicle is fully charged. The third sending module is configured to send a full charge message to the BMC, indicating that the second vehicle is fully charged, based on the charging indication information. The fourth receiving module is configured to receive a discharge completion message from the BMC, the discharge completion message being used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function. The second calling module is configured to switch from calling the pile-side communication function to calling the vehicle-side communication function based on the discharge completion message.

[0267] For the explanation of each term, please refer to the relevant description in the aforementioned method embodiment and will not be elaborated here.

[0268] It should be noted that the specific execution process of the vehicle charging device 1300 can be found in Figures 9 to 11 The detailed description of the illustrated embodiment will not be repeated here.

[0269] Each module in the vehicle charging device 1300 may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in hardware form, or may be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0270] like Figure 14 As shown, the embodiment of the present application further provides a vehicle, which is a first vehicle 1400, and the vehicle includes a BMC 1401 and a communication controller 1402 connected thereto. The BMC 1401 is used to execute the steps of the method as shown in the first aspect or any embodiment of the first aspect, such as executing the method as shown in Figures 1 to 8 、 Figure 11 communication controller 1402 for executing the steps of the method as shown in the second aspect or any embodiment of the second aspect, such as executing Figures 9 to 11 The embodiment shown.

[0271] In the case that high-power DC charging piles for charging electric vehicles are not fully popularized, the embodiments of the present application start from the perspective of adding ways to charge vehicles with DC, and improve the convenience of DC charging of vehicles through a variety of different DC charging methods. Based on this, the present embodiment provides a vehicle that can be connected to a charging pile by a cable and can also be connected to other vehicles by a cable. Compared with the functions of current electric vehicles, this vehicle supports the function of CCS DC charging and also supports the function of CCS vehicle-to-vehicle DC charging. This vehicle serves as the first vehicle 1400, and the other vehicles serve as the second vehicle. If the first vehicle 1400 is connected to the charging pile, the first vehicle 1400 is a charging vehicle, and the first vehicle 1400 can be charged by the charging pile to achieve vehicle DC charging; if the first vehicle 1400 is connected to the second vehicle, the second vehicle is a charging vehicle, and the first vehicle 1400 is a discharging vehicle. The second vehicle can be charged by the first vehicle 1400 to achieve vehicle-to-vehicle DC charging. Based on this, by determining whether the first vehicle 1400 is connected to the charging pile or the second vehicle, it can be determined whether the first vehicle 1400 is a charging vehicle provided with charging power or a discharging vehicle providing charging power during the vehicle charging process.

[0272] The communication controller 1402 of the first vehicle 1400 can not only serve as a vehicle-side communication controller for current electric vehicles, having a vehicle-side communication function for communicating between the charging vehicle and the power supply equipment, transmitting the charging demand information of the first vehicle 1400 to the power supply equipment and receiving discharge information from the power supply equipment, but can also serve as a charging-side communication controller, having a charging-side communication function for communicating between the power supply equipment and the charging vehicle, transmitting discharge information of the first vehicle 1400 to the second vehicle, serving as the charging vehicle, and receiving charging demand information from the second vehicle sent by the vehicle-side communication controller of the second vehicle. Based on this, if the first vehicle 1400 is connected to the second vehicle, and the first vehicle 1400 serves as the power supply equipment for the discharge vehicle, the communication controller 1402 of the first vehicle 1400 needs to invoke the charging-side communication function to communicate with the vehicle-side communication controller of the second vehicle.

[0273] Specifically, if first vehicle 1400 is connected to a second vehicle, with first vehicle 1400 acting as a power supply, BMC 1401 of first vehicle 1400 sends a communication establishment signal to communication controller 1402, and also sends a ready message to communication controller 1402 via the subnet. Upon receiving the communication establishment signal and ready message, communication controller 1402 invokes the charging terminal communication function based on instructions from first vehicle 1400 to discharge and to establish communication with the second vehicle, thereby enabling communication between first vehicle 1400, acting as a power supply, and the second vehicle, acting as a charging vehicle. Furthermore, communication controller 1402 receives the communication establishment signal and ready message from BMC 1401 and invokes the charging terminal communication function based on the communication establishment signal and ready message. Furthermore, the communication controller 1402 receives the charging requirement information of the second vehicle sent by the vehicle-side communication controller of the second vehicle through the pile-side communication function, and sends a charging requirement message including the charging requirement information of the second vehicle to BMC1401 through the subnet, so that BMC1401 controls the first vehicle 1400 to provide charging power to the second vehicle according to the charging requirement information of the second vehicle.

[0274] In this embodiment, when a first vehicle 1400 is connected to a second vehicle, the communication controller 1402 of the first vehicle 1400 invokes the charging station communication function to receive the charging requirement information of the second vehicle sent by the vehicle-side communication controller of the second vehicle via the charging station communication function, thereby enabling communication between the first vehicle 1400, serving as the power supply device, and the second vehicle, serving as the charging vehicle. Furthermore, the BMC 1401 of the first vehicle 1400 controls the first vehicle 1400 to provide charging energy to the second vehicle based on the charging requirement information of the second vehicle, thereby enabling DC charging of the second vehicle by the first vehicle 1400. Using the vehicles of this embodiment, through vehicle-to-vehicle DC charging, a new method for DC charging of vehicles is added, which helps to improve the convenience of DC charging of vehicles.

[0275] like Figure 15 As shown, in one embodiment, the first vehicle further includes a motor controller (FMCU), an on-board charger (OBC), a voltage detection module (VDM), a DC-to-DC converter (DC in the figure), a left domain, and an instrument panel. The left domain refers to the electronic equipment that controls various functions of the vehicle's left body. It enables centralized control of various sensors and actuators on the left body, including windows, doors, seats, airbags, and so on. By using the left domain, vehicle safety and comfort can be improved.

[0276] Specifically, the communication controller and the BMC exchange information via a subnet using special messages. When a first vehicle connects to a second vehicle, the communication controller invokes the charging-side communication function to transmit the first vehicle's discharge information, sent by the BMC, to the second vehicle, and also transmits the second vehicle's charging requirements to the BMC. The BMC then controls the front motor controller to adjust the first vehicle's discharge voltage and current in real time based on the charging requirements. The BMC and front motor controller exchange information to implement voltage adjustment and status feedback. Furthermore, when the discharge voltage and current meet the second vehicle's charging requirements, the BMC controls the first vehicle's battery pack to provide charging energy to the second vehicle, enabling the first vehicle to implement CCS vehicle-to-vehicle DC charging. The BMC also sends discharge information to the instrument cluster, which displays the information and identification information related to the entire discharge process. Furthermore, the BMC sends an electric lock request to the onboard charger, which forwards the electric lock request to the left domain to control the electric lock. The DC converter converts the DC power battery voltage to a low-voltage 12V for use in the first vehicle's low-voltage electrical equipment. If the first vehicle is connected to the charging pile, the communication controller calls the vehicle-side communication function, transmits the first vehicle charging demand of the first vehicle sent by the BMC to the charging pile, and transmits the discharge information of the charging pile to the BMC. Furthermore, the BMC controls the battery pack of the first vehicle to receive the charging power provided by the charging pile, so that the first vehicle can realize the CCS DC charging function. In addition, the BMC sends charging information to the instrument to display the charging information through the instrument. In addition, the instrument also displays the identification information involved in the entire charging process. In addition, the BMC sends an electric lock request to the on-board charger, and the on-board charger forwards the electric lock request to the left domain to control the electric lock; the DC converter converts the voltage of the DC power battery into a low-voltage electricity of 12V for use by the low-voltage electrical appliances of the first vehicle; the voltage detection module performs self-test on the input voltage of the DC charging port of the first vehicle, etc.

[0277] In this embodiment, the first vehicle in this embodiment invokes the pile-side communication function or the vehicle-side communication function via the communication controller. Accordingly, the BMC controls the first vehicle to provide charging energy to the second vehicle, or controls the first vehicle to receive charging energy from the charging pile, thereby enabling the first vehicle to implement CCS DC charging or CCS vehicle-to-vehicle DC charging. This embodiment provides multiple ways to perform DC charging for vehicles, which helps improve the convenience of DC charging for vehicles.

[0278] like Figure 16 As shown, the embodiment of the present application further provides a vehicle, which is a first vehicle 1600, and the vehicle includes a BMC 1610, and a communication controller 1611 is integrated in the BMC 1610. The first vehicle 1600, the BMC 1610 and the communication controller 1611 in the embodiment of the present application are respectively Figure 14 The functions and working principles of the first vehicle 1400, BMC 1401 and communication controller 1402 provided in the embodiment are the same, therefore, the similarities are not repeated here, and reference may be made to Figure 14 The only difference is the connection method, i.e. Figure 14 The BMC 1401 and the communication controller 1402 interact with each other in the form of special messages through the subnet. The two are in the form of plug-ins and are independent of each other. In this embodiment, Figure 16 As shown, the communication controller 1611 is integrated in the BMC 1610 , and when the BMC 1610 and the communication controller 1611 interact with each other, there is no need to interact with each other through a subnet.

[0279] In this embodiment, if Figure 16 As shown, integrating the communication controller 1611 on the BMC1610 can reduce the wiring harness between the communication controller 1611 and the BMC1610, avoid failure of the charging and discharging function of the first vehicle 1600 due to communication failure caused by disconnection or damage to external hardware, and help increase the success rate of the first vehicle 1600 in realizing the CCS DC charging function or realizing the CCS vehicle-to-vehicle DC charging function, and help enhance the stability of the function.

[0280] like Figure 17 As shown, in one embodiment, the first vehicle further includes a motor controller FMCU, an on-board charger OBC, a voltage detection module VDM, a DC-to-DC converter (shown as DC in the figure), a left domain, an instrument, etc. Figure 17 The first vehicle shown is Figure 15 The functions and working principles of the first vehicle are the same, so the similarities are not repeated here. Figure 15 The only difference is the connection method, i.e. Figure 15 The BMC and the communication controller interact with each other in the form of special messages through the subnet. The two are in the form of plug-ins and are independent of each other. In this embodiment, Figure 17 As shown, the communication controller is integrated in the BMC. When the BMC and the communication controller exchange information, there is no need to exchange information through a subnet.

[0281] In this embodiment, integrating the communication controller on the BMC can reduce the wiring harness between the communication controller and the BMC, avoid failure of the first vehicle's charging and discharging function caused by communication failure due to disconnection or damage to external hardware, and help increase the success rate of the first vehicle realizing the CCS DC charging function or realizing the CCS vehicle-to-vehicle DC charging function, and help enhance the stability of the function.

[0282] like Figure 18As shown, the embodiment of the present application further provides a vehicle charging system 1800, which includes:

[0283] The vehicle as shown in the fifth aspect or any embodiment of the fifth aspect, Figures 14 to 17 The embodiment shown, as Figure 18 As shown, the vehicle is a first vehicle 1801;

[0284] A second vehicle 1802 , which is a charging vehicle that requires the first vehicle 1801 to provide charging power; and

[0285] The cable 1803 is used to connect the first vehicle 1801 and the second vehicle 1802 . The first vehicle 1801 and the second vehicle 1802 communicate or transmit energy via the cable 1803 .

[0286] Specifically, a first vehicle 1801, serving as a discharging vehicle providing charging energy, is connected to a second vehicle 1802, serving as a charging vehicle, via a cable 1803. The communication controller of the first vehicle 1801 invokes a charging-side communication function to receive, via cable 1803, charging demand information of the second vehicle 1802, sent by the vehicle-side communication controller of the second vehicle 1802. The communication controller then transmits discharge information of the first vehicle 1801 to the vehicle-side communication controller of the second vehicle 1802 via cable 1803, thereby enabling communication between the first vehicle 1801 and the second vehicle 1802. Furthermore, the battery management system (BMC) of the first vehicle 1801 controls the first vehicle 1801 to provide charging energy to the second vehicle 1802 based on the charging demand information of the second vehicle 1802. Specifically, the battery pack of the first vehicle 1801 is controlled to transmit energy to the battery pack of the second vehicle 1802 via cable 1803, thereby enabling DC charging of the second vehicle 1802 by the first vehicle 1801.

[0287] Using the vehicle charging system 1800 of this embodiment, the communication controller of the first vehicle 1801 invokes the charging-side communication function, enabling the first vehicle 1801 to implement CCS vehicle-to-vehicle DC charging, adding a new method for DC charging and improving the convenience of DC charging for vehicles. Furthermore, the hardware of this vehicle charging system 1800 requires only the addition of a VTOV conductive connection cable to existing electric vehicles to connect the charging and discharging vehicle charging ports. The software of this vehicle charging system 1800 requires only the addition of a charging-side communication function to the existing vehicle-side communication function of the communication controller of the first vehicle 1801, allowing the communication controller to invoke one function or switch between the two functions as needed. This vehicle charging system 1800 offers the advantages of ease of construction, low cost, and a short development cycle.

[0288] like Figure 19As shown in one embodiment, the first and second vehicles in the vehicle charging system each further include a motor controller (FMCU), an on-board charger (OBC), a voltage detection module (VDM), a DC-to-DC converter (DC in the figure), a left domain, and an instrument panel. The left domain refers to the electronic equipment that controls various functions of the vehicle's left body. It enables centralized control of various sensors and actuators on the left body, including windows, doors, seats, airbags, and more. By using the left domain, vehicle safety and comfort can be improved.

[0289] Specifically, the first vehicle is connected to the second vehicle via a cable. Figure 19 The cable is not shown in the figure. The cable is used for communication between the communication controller SECC in the first vehicle that calls the pile-end communication function and the vehicle-end communication controller EVCC in the second vehicle, and for energy transmission between the battery pack of the first vehicle and the battery pack of the second vehicle.

[0290] In the first vehicle: The communication controller and the BMC exchange information via a subnet in the form of special messages. The communication controller invokes the pile-side communication function and transmits the discharge information of the first vehicle sent by the BMC to the vehicle-side communication controller of the second vehicle via the inter-vehicle network. The second vehicle's charging requirement information is also transmitted to the BMC. Furthermore, the BMC controls the front motor controller to adjust the discharge voltage and discharge current of the first vehicle in real time based on the charging requirement information. The BMC and the front motor controller exchange information to achieve voltage adjustment and status feedback. Furthermore, when the discharge voltage and discharge current meet the charging requirement information of the second vehicle, the BMC controls the battery pack of the first vehicle to provide charging energy to the second vehicle, enabling the first vehicle to achieve the CCS vehicle-to-vehicle DC charging function. Furthermore, the BMC sends discharge information to the instrument to display the discharge information on the instrument. In addition, the instrument also displays identification information involved in the entire discharge process. In addition, the BMC sends an electric lock request to the on-board charger, and the on-board charger forwards the electric lock request to the left domain to control the electric lock; the DC converter converts the voltage of the DC power battery into 12V low-voltage electricity for use by the low-voltage electrical appliances of the first vehicle, etc.

[0291] In the second vehicle, the vehicle-side communication controller and the BMC exchange information via a subnet using special messages. The vehicle-side communication controller transmits the second vehicle's charging requirements, sent by the BMC, to the communication controller of the first vehicle via the inter-vehicle network, and also transmits the first vehicle's discharge information to the BMC. The BMC then controls the second vehicle's battery pack to receive charging energy from the first vehicle, enabling the second vehicle to implement CCS DC charging. Furthermore, the BMC sends charging information to the instrument panel, which displays the charging information and identification information related to the entire charging process. Furthermore, the BMC sends an electric lock request to the onboard charger, which forwards the electric lock request to the left domain to control the electric lock. The DC converter converts the voltage of the DC power battery into a low-voltage 12V voltage for use by the second vehicle's low-voltage electrical appliances. The voltage detection module performs a self-test on the input voltage of the second vehicle's DC charging port.

[0292] By using the vehicle charging system in this embodiment, the communication controller of the first vehicle calls the pile-end communication function, so that the first vehicle realizes the CCS vehicle-to-vehicle DC charging function, and the second vehicle realizes the CCS DC charging function, adding a way to DC charge the vehicle, which is conducive to improving the convenience of DC charging of the vehicle.

[0293] The present application also provides a vehicle charging system, which includes:

[0294] The vehicle as shown in the fifth aspect or any embodiment of the fifth aspect, Figures 14 to 17 In the illustrated embodiment, the vehicle is a first vehicle;

[0295] A charging pile, the charging pile is used to provide charging power to the first vehicle;

[0296] The cable is used to connect the first vehicle and the charging pile, and the first vehicle and the charging pile communicate or transmit energy through the cable.

[0297] like Figure 20 The first vehicle and charging pile shown, Figure 20 The cable is not shown in the figure. The cable is used for communication between the communication controller EVCC in the first vehicle that calls the vehicle-side communication function and the pile-side communication controller SECC in the charging pile, and for energy transmission between the battery pack of the first vehicle and the external charger, rectifier or DC power supply of the charging pile. Figure 20 As shown, the first vehicle in the vehicle charging system also includes a motor controller FMCU, an on-board charger OBC, a voltage detection module VDM, a DC-to-DC converter (DC in the figure), a left domain, an instrument, etc. The charging pile also includes an EVSE control box for the pile-end power supply controller.

[0298] Specifically, a first vehicle is connected to a charging station via a cable. In the first vehicle, a communication controller, which invokes the vehicle-side communication function, exchanges information with the charging station management system (BMC) via a subnet using special messages. The communication controller transmits the charging demand information of the first vehicle, sent by the BMC, via the inter-vehicle network to the charging station's communication controller, and also transmits discharge information from the charging station to the BMC. The BMC then controls the battery pack of the first vehicle to receive charging energy from the charging station, enabling the first vehicle to implement CCS DC charging. Furthermore, the BMC sends charging information to the meter, which displays the information and identification information related to the entire charging process. Furthermore, the BMC sends an electric lock request to the onboard charger, which forwards the electric lock request to the left domain to control the electric lock. A DC converter converts the voltage of the DC power battery to a low-voltage 12V voltage for use by the first vehicle's low-voltage electrical devices. A voltage detection module performs a self-test on the input voltage of the first vehicle's DC charging port.

[0299] In a charging pile, a pile-end communication controller receives discharge information from the control box of the pile-end power supply controller, transmits it to the communication controller of the first vehicle via the vehicle-to-vehicle network, and transmits the first vehicle charging requirement of the first vehicle to the control box of the pile-end power supply controller. Furthermore, the control box of the pile-end power supply controller adjusts the discharge voltage and current of the charging pile in real time based on the charging requirement of the first vehicle. When the discharge voltage and current meet the charging requirement of the first vehicle, the control box of the pile-end power supply controller controls the external charger, rectifier, or DC power supply of the charging pile to provide charging energy to the first vehicle.

[0300] By adopting the vehicle charging system in this embodiment, the vehicle-side communication function is called through the communication controller of the first vehicle, so that the first vehicle can realize the default CCS DC charging function. The vehicle charging system in this embodiment, while enriching and expanding the functions of the communication controller and the first vehicle, does not affect the realization of the original functions of the communication controller and the first vehicle in the current electric vehicle technology, and does not affect the DC charging of the first vehicle through the high-power DC charging pile.

[0301] like Figure 21 As shown, the embodiment of the present application further provides a computer device 2100. Exemplarily, the computer device 2100 may include a processor 2101, a communication interface 2102, a communication bus 2103, and a memory 2104. Specifically, the computer device 2100 may include:

[0302] At least one processor 2101, such as a CPU, at least one communication interface 2102, a memory 2104, and at least one communication bus 2103. The communication bus 2103 is used to realize the connection and communication between these components. The communication interface 2102 may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface or a Bluetooth interface, etc.). The memory 2104 may be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The memory 2104 may optionally be at least one storage device located away from the aforementioned processor 2101. Figure 21 As shown, the memory 2104 as a computer storage medium may include an operating system and program instructions.

[0303] Exemplarily, the processor 2101 may be used to implement the above Figure 12 The steps or methods executed by the determination module 1201, the first control module 1202 and the second control module 1203.

[0304] It is understandable that the above method is only an example, and the processor 2101 and other modules in the computer device 2100 can also cooperate to perform the above method. Figure 12 The steps or methods executed by the determination module 1201, the first control module 1202 and the second control module 1203 are not limited in this document.

[0305] exist Figure 21 In the computer device 2100 shown, the processor 2101 may be configured to load program instructions stored in the memory 2104 and specifically perform the following operations:

[0306] Determining that the first vehicle is connected to the charging pile or the second vehicle;

[0307] If the first vehicle is connected to the charging pile, controlling the first vehicle to receive charging power provided by the charging pile to the first vehicle;

[0308] If the first vehicle is connected to the second vehicle, the first vehicle is controlled to provide charging power to the second vehicle.

[0309] For the explanation of each term, please refer to the relevant description in the aforementioned method embodiment and will not be elaborated here.

[0310] It should be noted that the specific implementation process can be found in Figures 1 to 8 、 Figure 11 The detailed description of the illustrated embodiment will not be repeated here.

[0311] Exemplarily, the processor 2101 may also be used to implement the above Figure 13The steps or methods executed by the second receiving module 1301, the first calling module 1302, the obtaining module 1303 and the second sending module 1304.

[0312] It is understandable that the above method is only an example, and the processor 2101 and other modules in the computer device 2100 can also cooperate to perform the above method. Figure 13 The steps or methods executed by the second receiving module 1301, the first calling module 1302, the obtaining module 1303 and the second sending module 1304 are not limited in this document.

[0313] exist Figure 21 In the computer device 2100 shown, the processor 2101 may be configured to load program instructions stored in the memory 2104 and specifically perform the following operations:

[0314] receiving a communication establishment signal and a ready message from the BMC of the first vehicle, wherein the communication establishment signal is used to instruct the communication controller of the first vehicle to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge;

[0315] Call the pile-side communication function according to the communication establishment signal and ready message;

[0316] Obtaining charging demand information of the second vehicle through the pile-end communication function;

[0317] A charging requirement message including charging requirement information of the second vehicle is sent to the BMC.

[0318] For the explanation of each term, please refer to the relevant description in the aforementioned method embodiment and will not be elaborated here.

[0319] It should be noted that the specific implementation process can be found in Figures 9 to 11 The detailed description of the illustrated embodiment will not be repeated here.

[0320] The present application also provides a computer-readable storage medium that can store multiple instructions, which are suitable for being loaded and executed by a processor as described above. Figures 1 to 11 The method steps of the embodiment shown in the figure can be found in the specific execution process. Figures 1 to 11 The detailed description of the illustrated embodiment will not be repeated here.

[0321] As used in the above embodiments, the term “when…” may be interpreted to mean “if…” or “after…” or “in response to determining…” or “in response to detecting…”, depending on the context. Similarly, the phrases “upon determining…” or “if (stated condition or event) is detected” may be interpreted to mean “if determining…” or “in response to determining…” or “upon detecting (stated condition or event)” or “in response to detecting (stated condition or event)”, depending on the context.

[0322] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk).

[0323] Those skilled in the art will appreciate that all or part of the process steps in the above-described method embodiments can be implemented by a computer program instructing the relevant hardware. The program can be stored in a computer-readable storage medium, and when executed, the program can include the process steps in the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

[0324] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0325] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A vehicle charging method, characterized in that: The method comprises: Determining that the first vehicle is connected to the charging pile or the second vehicle; If the first vehicle is connected to the charging pile, controlling the first vehicle to receive charging power provided by the charging pile to the first vehicle; If the first vehicle is connected to the second vehicle, the first vehicle is controlled to provide charging power to the second vehicle.

2. The method according to claim 1, characterized in that If the first vehicle is connected to the second vehicle, controlling the first vehicle to provide charging power to the second vehicle includes: If the first vehicle is connected to the second vehicle, a communication establishment signal is sent to the communication controller of the first vehicle, and a ready message is sent to the communication controller, so that the communication controller calls the pile-end communication function according to the communication establishment signal and the ready message, wherein the communication establishment signal is used to instruct the communication controller to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge; receiving a charging requirement message sent by the communication controller, wherein the charging requirement message includes charging requirement information of the second vehicle acquired by the communication controller through the pile-end communication function; The first vehicle is controlled to provide charging power to the second vehicle according to the charging requirement information of the second vehicle.

3. The method according to claim 2, characterized in that The sending of a communication establishment signal to the communication controller of the first vehicle includes: A ready signal is sent to the on-board charger of the first vehicle to instruct the on-board charger to send the communication establishment signal to the communication controller.

4. The method according to claim 2, characterized in that The charging requirement information includes a charging requirement voltage and a charging requirement current, and controlling the first vehicle to provide charging power to the second vehicle based on the charging requirement information of the second vehicle includes: Sending the required charging voltage and the required charging current of the second vehicle to a motor controller of the first vehicle to instruct the motor controller to control the electric drive voltage reduction according to the required charging voltage and the required charging current, so as to adjust the discharge voltage and discharge current of the first vehicle; When the discharge voltage reaches the required charging voltage and the discharge current reaches the required charging current, charging electric energy is provided to the second vehicle at the discharge voltage and the discharge current.

5. The method according to claim 2, characterized in that The method further comprises: receiving a fully charged message sent by the communication controller indicating that the second vehicle is fully charged; controlling the first vehicle to stop providing charging power to the second vehicle according to the full power message; A discharge end message is sent to the communication controller, where the discharge end message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function.

6. The method according to any one of claims 1 to 5, characterized in that If the first vehicle is connected to the second vehicle, controlling the first vehicle to provide charging power to the second vehicle includes: If the first vehicle is connected to the second vehicle, a discharge trigger signal is received; In response to the discharge trigger signal, entering a discharge procedure; Based on the discharge program, the first vehicle is controlled to provide charging power to the second vehicle.

7. The method according to any one of claims 1 to 5, characterized in that The determining that the first vehicle is connected to the charging pile or the second vehicle includes: receiving a cable connection signal, the cable connection signal being used to indicate that a cable has been connected to the first vehicle, the cable connection signal including a cable resistance value; According to the cable resistance, it is determined that the first vehicle is connected to the charging pile or the second vehicle through the cable.

8. The method according to claim 7, characterized in that The determining, based on the cable resistance, that the first vehicle is connected to the charging pile or the second vehicle via the cable includes: If the cable resistance falls within the charging resistance range, determining that the first vehicle is connected to the charging pile via the cable; or If the cable resistance does not fall within the charging resistance range, it is determined that the first vehicle is connected to the second vehicle via the cable.

9. A vehicle charging method, characterized in that: The method comprises: receiving a communication establishment signal and a ready message from the BMC of the first vehicle, wherein the communication establishment signal is used to instruct the communication controller of the first vehicle to establish communication with the second vehicle, and the ready message is used to instruct the first vehicle to discharge; Calling a pile-end communication function according to the communication establishment signal and the ready message; Acquiring charging requirement information of the second vehicle through the pile-end communication function; A charging requirement message including the charging requirement information of the second vehicle is sent to the BMC.

10. The method according to claim 9, characterized in that The calling of the terminal communication function according to the communication establishment signal and the ready message includes: According to the communication establishment signal and the ready message, the call is switched from the vehicle-side communication function to the pile-side communication function.

11. The method according to claim 9, characterized in that The method further comprises: receiving charging indication information sent by the second vehicle, where the charging indication information is used to indicate that the second vehicle is fully charged; sending, according to the charging indication information, a full charge message to the BMC, indicating that the second vehicle is fully charged; receiving a discharge end message from the BMC, wherein the discharge end message is used to instruct the communication controller to switch from calling the pile-side communication function to calling the vehicle-side communication function; According to the discharge end message, the calling of the pile-side communication function is switched to the calling of the vehicle-side communication function.

12. A vehicle, characterized in that: The vehicle is a first vehicle, and the vehicle includes a BMC and a communication controller connected thereto; The BMC is used to execute the steps of the method according to any one of claims 1 to 8, and the communication controller is used to execute the steps of the method according to any one of claims 9 to 11.

13. A vehicle charging system, characterized in that: The system comprises: The vehicle of claim 12, wherein the vehicle is a first vehicle; a second vehicle, the second vehicle being a charging vehicle requiring charging power provided by the first vehicle; and A cable is used to connect the first vehicle and the second vehicle, and the first vehicle and the second vehicle communicate or transmit energy through the cable.

14. A computer device, characterized in that: include: A memory and a processor, wherein the memory stores program instructions; when the program instructions are executed by the processor, the processor executes the method according to any one of claims 1 to 11.

15. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program; when the computer program is run on one or more processors, the method according to any one of claims 1 to 11 is executed.

16. A computer program product, characterized in that The computer program product comprises a computer program or instructions; when the computer program or instructions are run on a computer, the computer is caused to perform the method according to any one of claims 1 to 11.

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