Vehicle-to-vehicle charging and discharging method and device, computer readable storage medium and vehicle

Abstract

According to the vehicle-to-vehicle charging and discharging method and device, the computer readable storage medium and the vehicle, when the difference value between the voltage of the first vehicle and the voltage of the target interface is larger than the first difference value, a first motor and a second motor are charged through an energy storage unit, connection between the energy storage unit and the first motor and connection between the energy storage unit and the second motor are disconnected, and the vehicle-to-vehicle charging and discharging is achieved. And connecting the target interface with the first motor and the second motor, charging the second vehicle through the first magnetic storage unit and the second magnetic storage unit, charging the first motor and the second motor through the energy storage unit when the difference value between the voltage of the first vehicle and the voltage of the target interface is smaller than a second difference value, and connecting the target interface with the first motor and the second motor, and the second vehicle is charged through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, so that the energy storage module of the new energy vehicle is used for charging the powered vehicle, the problem of voltage mismatching in the power supply process is solved, vehicle road rescue can be rapidly achieved, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, and in particular to a vehicle-to-vehicle charging and discharging method, device, computer-readable storage medium and vehicle. Background Art

[0002] With the development of new energy vehicles, new energy vehicles that can both charge and discharge have appeared on the market. Furthermore, new energy vehicles that need to use electricity to provide power can use portable charging devices to achieve car-to-car charging. Specifically, when a new energy vehicle breaks down due to exhaustion, any other new energy vehicle can charge it through a portable charging device, but the portable charging device is still large in size and takes up a lot of space when carried in the car. In addition, portable charging devices have the problem of low-voltage power supply, and it is necessary to set up additional energy storage devices such as batteries for the charging device, which is not convenient enough. Summary of the invention

[0003] The embodiments of the present application provide a vehicle-to-vehicle charging and discharging method, device, computer-readable storage medium and vehicle, which utilize the electric vehicle's own energy storage module to charge the receiving vehicle for vehicle-to-vehicle charging, thereby reducing the inconvenience of carrying portable charging equipment.

[0004] In a first aspect, an embodiment of the present application provides a vehicle-to-vehicle charging and discharging method, which is applied to a first vehicle. The vehicle-to-vehicle charging and discharging method includes:

[0005] Obtaining a difference between a voltage of the first vehicle and a voltage of a target interface;

[0006] When the difference between the voltage of the first vehicle and the voltage of the target interface is greater than a first difference, charging the first motor and the second motor through the energy storage unit;

[0007] Disconnecting the energy storage unit from the first motor and the second motor, connecting the target interface to the first motor and the second motor, and charging the second vehicle through the first magnetic storage unit and the second magnetic storage unit;

[0008] When the difference between the voltage of the first vehicle and the voltage of the target interface is less than a second difference, charging the first motor and the second motor through the energy storage unit;

[0009] Connect the target interface with the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for connecting to a second vehicle.

[0010] In a second aspect, an embodiment of the present application provides a vehicle-to-vehicle charging and discharging device, comprising:

[0011] An acquisition module, used for acquiring a difference between a voltage of the first vehicle and a voltage of a target interface;

[0012] a first charge and discharge control module, configured to charge the first motor and the second motor through an energy storage unit when a difference between a voltage of the first vehicle and a voltage of the target interface is greater than a first difference;

[0013] a second charge and discharge control module, configured to disconnect the energy storage unit from the first motor and the second motor, connect the target interface to the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit and the second magnetic storage unit;

[0014] a third charge and discharge control module, configured to charge the first motor and the second motor through the energy storage unit when the difference between the voltage of the first vehicle and the voltage of the target interface is less than a second difference;

[0015] A fourth charge and discharge control module is used to connect the target interface with the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for being connected to a second vehicle.

[0016] In a third aspect, an embodiment of the present application provides a vehicle-to-vehicle charging and discharging device, which is applied to a first vehicle. The device includes a processor and a memory. The memory stores one or more programs, and the one or more programs are configured to be executed by the processor. The processor is also used for the steps in the method described in the first aspect. The one or more programs include instructions for executing the steps in the method described in the first aspect.

[0017] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. The computer storage medium stores a computer program, and the computer program includes program instructions. When the program instructions are executed by a processor, the processor performs the steps of the method as described in any one of the first and second aspects.

[0018] In a fifth aspect, an embodiment of the present application provides a vehicle, comprising a vehicle-to-vehicle charging and discharging device as described in the second aspect, or comprising a vehicle-to-vehicle charging and discharging device as described in the third aspect.

[0019] By implementing the embodiment of the present application, firstly, the difference between the voltage of the first vehicle and the voltage of the target interface is obtained. When the difference between the voltage of the first vehicle and the voltage of the target interface is greater than the first difference, the first motor and the second motor are charged through the energy storage unit, the connection between the energy storage unit and the first motor and the second motor is disconnected, the target interface is connected to the first motor and the second motor, and the second vehicle is charged through the first magnetic storage unit and the second magnetic storage unit. When the difference between the voltage of the first vehicle and the voltage of the target interface is less than the second difference, the first motor and the second motor are charged through the energy storage unit, the target interface is connected to the first motor and the second motor, and the second vehicle is charged through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for connection with the second vehicle. In this way, in any scenario, the receiving vehicle that urgently needs to be recharged due to battery power feed does not need mobile charging piles and portable charging equipment, and vehicle-to-vehicle charging and discharging can be achieved. The electric vehicle's own energy storage module can be used to charge the receiving vehicle, reducing the inconvenience of carrying portable charging equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background technology, the drawings required for use in the embodiments of the present invention or the background technology will be described below.

[0021] Figure 1 is a framework diagram of a vehicle-to-vehicle charging and discharging device provided in an embodiment of the present application;

[0022] Figure 2 It is a structural block diagram of a vehicle-to-vehicle charging and discharging device provided in an embodiment of the present application;

[0023] Figure 3 It is a flow chart of a vehicle-to-vehicle charging and discharging method provided in an embodiment of the present application;

[0024] Figure 4 It is a circuit diagram of vehicle-to-vehicle charging and discharging provided in an embodiment of the present application;

[0025] Figure 5 It is a structural schematic diagram of a vehicle-to-vehicle charging and discharging device provided in an embodiment of the present application;

[0026] Figure 6 is a structural schematic diagram of another vehicle-to-vehicle charging and discharging device provided in an embodiment of the present application;

[0027] Figure 7 is another circuit diagram of vehicle-to-vehicle charging and discharging provided in an embodiment of the present application;

[0028] Figure 8 It is a structural schematic diagram of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or electronic device that includes a series of steps or units is not limited to the listed steps or units, but in an optional example also includes steps or units that are not listed, or in an optional example also includes other steps or units inherent to these processes, methods, products, or electronic devices.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] Electronic devices may include smart phones (such as Android phones, iOS phones, Windows Phone phones, etc.), tablet computers, PDAs, driving recorders, vehicle-mounted electronic devices, servers, laptops, mobile Internet electronic devices (MID, Mobile Internet Devices) or wearable electronic devices (such as smart watches, Bluetooth headsets), etc. The above are only examples and not exhaustive, including but not limited to the above electronic devices.

[0033] With the development of new energy vehicles, new energy vehicles that can both charge and discharge have appeared on the market. At present, new energy vehicles that need electricity to provide power can use portable charging devices to achieve car-to-car charging. Although the portable charging device can be used to charge any other new energy vehicle when a new energy vehicle breaks down due to exhaustion, the entire size of the device is still large, and it takes up a lot of space when carried in the car. In addition, the portable charging device has the problem of low-voltage power supply, and it is necessary to set up additional energy storage devices such as batteries for the charging device, which is not convenient enough.

[0034] In response to the above problems, the embodiments of the present application provide a vehicle-to-vehicle charging method and related devices for powering vehicles. A new energy vehicle equipped with this solution can achieve vehicle-to-vehicle charging and discharging in any scenario where the receiving vehicle urgently needs to be recharged due to battery power feed, without the need for mobile charging piles and portable charging equipment. This is beneficial to reducing the expensive cost of calling a mobile charging vehicle and the inconvenience of carrying portable charging equipment, and can quickly achieve vehicle road rescue and improve user experience.

[0035] See also Figure 1 , Figure 1 This is a block diagram of the composition of a vehicle-to-vehicle charging and discharging device provided in an embodiment of the present application. The first vehicle 100 includes an energy storage unit 110, a first motor 120, a second motor 130, a target interface 140, and a controller 150. The first motor 120 includes a first interface 1201 of the first motor, a third interface 1202 of the first motor, and a second interface 1203 of the first motor. The second motor 130 includes a first interface 1301 of the second motor, a third interface 1302 of the second motor, and a second interface 1303 of the second motor.

[0036] Among them, the first vehicle includes a new energy vehicle that needs electric energy to provide power, which can be a pure electric vehicle or a hybrid vehicle, and is not limited here.

[0037] Among them, the target interface 140 is connected to the second vehicle 200 through the first interface 1301 of the second motor and the third interface 1302 of the second motor, the energy storage unit 110 is connected to the first interface 1201 of the first motor and the third interface 1202 of the first motor, and is also connected to the third interface 1302 of the second motor and is also connected to the target interface, and the second interface 1203 of the first motor is connected to the second interface 1303 of the second motor.

[0038] Among them, the electric energy generated by the energy storage unit 110 can charge the first motor 120 and the second motor 130. After charging, the energy storage unit 110 and the first motor 120 and the second motor 130 can jointly power the target interface, or only the first motor 120 and the second motor 130 can power the target interface.

[0039] Among them, the controller 150 includes a processor and a memory. The memory stores one or more programs and is configured to be executed by the processor. The controller 150 is used to control the on and off of the circuit switch, and is also used to control the first motor and the second motor. It is also used to detect the charging and discharging process of the windings in the first motor and the second motor, and control the charging and discharging process. It is also used to detect and judge the voltage of the energy storage unit of the first vehicle and the second vehicle.

[0040] See also Figure 2 , Figure 2 It is a structural block diagram of a vehicle-to-vehicle charging and discharging device provided in an embodiment of the present application, wherein the first motor 120 includes a first bridge circuit unit 121 and a first magnetic storage unit 122, and the second motor 130 includes a second bridge circuit unit 131 and a second magnetic storage unit 132, wherein the first bridge circuit unit is connected to the first interface 1201 of the first motor, is connected to the third interface 1202 of the first motor, and is also connected to the first magnetic storage unit 122, the first magnetic storage unit 122 is connected to the second interface 1203 of the first motor, the second bridge circuit unit 131 is connected to the second magnetic storage unit 132, is connected to the third interface 1302 of the second motor, and is also connected to the first interface 1301 of the second motor, and the second magnetic storage unit 132 is also connected to the second interface 1303 of the second motor.

[0041] See also Figure 3 , Figure 3 is a flow chart of a vehicle-to-vehicle charging and discharging method provided in an embodiment of the present application, such as Figure 3 As shown, the method comprises the following steps:

[0042] S301, obtaining a difference between a voltage of the first vehicle and a voltage of a target interface.

[0043] Among them, the voltage of the target interface is generated by the second vehicle. The battery pack voltage of the second vehicle may be greater than the battery pack voltage of the first vehicle, or it may be less than the battery pack voltage of the first vehicle, or it may be equal to the battery pack voltage of the first vehicle. When the battery pack voltages of the first vehicle and the second vehicle are different, vehicle-to-vehicle charging cannot be performed well. Therefore, it is necessary to obtain the voltage values ​​of the first vehicle and the second vehicle, and adjust the battery pack voltage of the target interface to a range that matches the battery pack voltage of the second vehicle, and then perform vehicle-to-vehicle charging.

[0044] S3021: When the difference between the voltage of the first vehicle and the voltage of the target interface is greater than a first difference, the first motor and the second motor are charged through the energy storage unit.

[0045] Among them, the first difference is the threshold of the voltage difference between the power batteries of the first vehicle and the second vehicle, that is, the voltage difference between the energy storage units of the first vehicle and the second vehicle. The power battery is the energy storage unit. If the voltage difference between the first vehicle and the second vehicle exceeds the first difference, vehicle-to-vehicle charging cannot be performed directly. The voltage difference between the first vehicle and the second vehicle needs to be adjusted to a preset range before vehicle-to-vehicle charging can be performed.

[0046] The voltage of the target interface comes from the battery pack voltage of the second vehicle. The target interface is connected to the second vehicle via a connecting line, and the electric energy of the first vehicle is output to the second vehicle to charge the second vehicle.

[0047] Specifically, when the energy storage unit charges the first motor and the second motor, the first motor and the second motor are connected in series, and when the first motor and the second motor discharge, the first motor and the second motor are connected in series.

[0048] Specifically, when the energy storage unit charges the first motor and the second motor, the target interface is disconnected.

[0049] Among them, the on-off control of the switch is completed through a controller. The above-mentioned controller is an electronic device. The controller includes a processor, a memory, and one or more programs. The one or more programs are stored in the memory and execute step instructions. The above-mentioned one or more instructions include instructions for controlling the switch in the circuit.

[0050] Among them, during the charging process, the current flows from the energy storage unit to the multiple upper bridge circuits of the first inverter circuit of the first motor, and flows out from the multiple lower bridge circuits of the second inverter circuit of the second motor, and flows back to the energy storage unit to form a closed loop. The multiple upper bridge circuits can be three upper bridge circuits, and the multiple lower bridge circuits can also be three lower bridge circuits. The upper bridge circuit is connected to the first magnetic storage unit of the first motor. The first magnetic storage unit includes multiple coil windings, and each upper bridge circuit is connected to a coil winding. If the first motor and the second motor are three-phase motors, the first motor and the second motor respectively include three windings, that is, three upper bridge circuits and three lower bridge circuits are connected accordingly.

[0051] The controller controls the first inverter circuit and the second inverter circuit in the first motor and the second motor, thereby converting the DC power in the energy storage unit into the AC power of the first motor and the second motor.

[0052] S3031, disconnect the energy storage unit from the first motor and the second motor, connect the target interface to the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit and the second magnetic storage unit.

[0053] Specifically, when the power levels of the first magnetic storage unit and the second magnetic storage unit reach a power threshold, the energy storage unit is disconnected from the first motor and the second motor.

[0054] Among them, during charging, the controller continuously monitors the charging status. When it is detected that the first magnetic storage unit and the second magnetic storage unit are fully charged, the controller controls the on and off of multiple bridge circuits in the first bridge circuit and the second bridge circuit of the first motor to thereby change the charging and discharging state of the first motor and the second motor, and execute the next step of the program.

[0055] Among them, the state at this time is that the difference between the voltage of the first vehicle and the voltage of the target interface is greater than the first difference, that is, the voltage of the first vehicle needs to be reduced so that the voltage drops to within the first difference, and the electric energy of the first vehicle is transmitted to the second vehicle, wherein the first difference is an artificially preset value.

[0056] Specifically, after discharging to charge the target interface through the first magnetic storage unit and the second magnetic storage unit, the method further includes: when it is detected that the difference between the voltage of the first magnetic storage unit and / or the second magnetic storage unit and the target interface is less than a second value, charging the first magnetic storage unit and the second magnetic storage unit through the energy storage unit again.

[0057] Among them, when the first motor and the second motor are discharging, the coil windings of the first motor and the coil windings of the second motor continue to discharge, and when the freewheeling voltage does not meet the voltage condition for charging the second vehicle during the process of continuous voltage decline, the controller controls the first bridge circuit and the second bridge circuit and the switch of the first motor to charge, and this is repeated until the freewheeling voltage continuously meets the voltage condition for charging the second vehicle.

[0058] S3021: When the difference between the voltage of the first vehicle and the voltage of the target interface is less than a second difference, charging the first motor and the second motor through the energy storage unit.

[0059] Among them, the second difference is another voltage difference threshold of the power batteries of the first vehicle and the second vehicle, that is, the voltage difference of the energy storage units of the first vehicle and the second vehicle. The power battery is the energy storage unit. If the voltage difference between the first vehicle and the second vehicle exceeds the second difference, the vehicle-to-vehicle charging cannot be carried out directly. The voltage difference between the first vehicle and the second vehicle needs to be adjusted to a preset range before the vehicle-to-vehicle charging can be carried out.

[0060] The charging process is the same as that in the above step 3021, which will not be repeated here. For details, please refer to the content of step 3021.

[0061] S3032, connecting the target interface with the first motor and the second motor, and charging the second vehicle through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for connecting to a second vehicle.

[0062] Among them, when the controller detects that the voltage of the coil winding of the first motor and the coil winding of the second motor meets the charging threshold, the charging of the first motor and the second motor is terminated. The above-mentioned charging threshold is a threshold value that satisfies the voltage of the energy storage unit of the first vehicle and the voltage of the first motor and the second motor superimposed to meet the voltage for charging the second vehicle. The charging threshold may vary with the voltage of the second vehicle and is calculated by the controller program. Multiple thresholds may also be set manually for numerical matching, which is not limited here.

[0063] Specifically, the method further includes: when the difference between the total voltage output by the first magnetic storage unit and the second magnetic storage unit and the voltage of the target interface is less than a second difference, charging the first magnetic storage unit and the second magnetic storage unit through the energy storage unit.

[0064] Among them, the controller controls the switch of the circuit to connect the target interface to the second motor. At this time, the energy storage unit of the first vehicle and the first motor and the second motor jointly charge the second vehicle connected to the target interface, so that the voltage provided by the first vehicle is increased to a voltage that meets the charging voltage of the second vehicle; when discharging, the first motor and the second motor continue to discharge. If the voltage drops to a voltage that does not meet the charging voltage of the second vehicle during the continuous discharge process, the controller controls the first inverter circuit and the second inverter circuit and the switch of the first motor and the second motor to repeat the charging process of step 3031 for the first motor and the second motor until the voltage meets the charging voltage of the second vehicle, and repeats this process until the continuous flow voltage and the energy storage unit voltage are superimposed to meet the voltage condition for charging the second vehicle.

[0065] It can be seen that in this embodiment, by controlling the first inverter circuit and the second inverter circuit, the first magnetic storage unit, the second magnetic storage unit and the energy storage unit discharge to the target interface to boost or buck charge the second vehicle. In this way, in any scenario, the receiving vehicle that urgently needs to be recharged due to battery power feed does not need a mobile charging pile and a portable charging device, and vehicle-to-vehicle charging and discharging is realized, which is conducive to reducing the expensive cost of calling a mobile charging vehicle and reducing the inconvenience of carrying a portable charging device, and can quickly realize vehicle road rescue and improve user experience.

[0066] In one possible embodiment, see Figure 4 , Figure 4 A circuit diagram of vehicle-to-vehicle charging and discharging proposed in an embodiment of the present application is shown in FIG. Figure 4 As shown, when the first motor and the second motor are charged through the energy storage unit, the first switch K1, the second switch K2 and the third switch K3 are in a connected state, and the fourth switch K4 and the fifth switch K5 are in a disconnected state;

[0067] When discharging to the target interface through the first motor, the second motor and the energy storage unit, the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 are in a connected state;

[0068] When discharging to the target interface through the first motor and the second motor, the first switch K1 is in a disconnected state, and the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 are in a connected state;

[0069] Among them, the first switch K1 is located between the first interface of the energy storage unit and the first interface of the first motor, the second switch K2 is located between the second interface of the energy storage unit and the third interface of the first motor, the third switch K3 is located between the second interface of the first motor and the second interface of the second motor, the fourth switch K4 is located between the first interface of the second motor and the target interface, the fifth switch K5 is located between the third interface of the second motor and the target interface, and the third interface of the first motor is connected to the third interface of the second motor.

[0070] It can be seen that in the embodiment of the present application, the charging and boost / step-down discharge of the motor can be achieved by connecting two motors and two sets of inverter circuits in series, and controlling the on / off of switches and transistors, thereby directly charging a second vehicle with a different voltage. Moreover, the circuit is placed in the vehicle and does not rely on an external charging pile, thereby improving the convenience of vehicle-to-vehicle charging.

[0071] See also Figure 5 , Figure 5 is a structural schematic diagram of a vehicle-to-vehicle charging and discharging device proposed in an embodiment of the present application, such as Figure 5 As shown, a vehicle-to-vehicle charging and discharging device 500 includes:

[0072] An acquisition module 510, configured to acquire a difference between a voltage of the first vehicle and a voltage of the target interface;

[0073] a first charge and discharge control module 5201, configured to charge the first motor and the second motor through the energy storage unit when the difference between the voltage of the first vehicle and the voltage of the target interface is greater than a first difference;

[0074] A second charge and discharge control module 5301 is used to disconnect the energy storage unit from the first motor and the second motor after charging is completed, connect the target interface with the first motor and the second motor, and discharge the first magnetic storage unit and the second magnetic storage unit to the target interface to charge the second vehicle;

[0075] a third charge and discharge control module 5202, configured to charge the first motor and the second motor through the energy storage unit when the difference between the voltage of the first vehicle and the voltage of the target interface is less than a second difference;

[0076] The fourth charge and discharge control module 5302 is used to connect the target interface with the first motor and the second motor after charging is completed, and discharge to the target interface through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit to charge the second vehicle.

[0077] It is worth noting that the specific functional implementation of the vehicle-to-vehicle charging and discharging device 500 is shown in the above Figure 3 The description of the vehicle-to-vehicle charging and discharging method shown in the figure, for example, the acquisition module 510 is used to implement the relevant content of executing S301, and the first charging and discharging control module 5201 is used to implement the relevant content of executing S3021. The various units or modules in the vehicle-to-vehicle charging and discharging device 500 can be respectively or completely combined into one or several other units or modules to constitute, or one (some) of the units or modules can also be divided into multiple functionally smaller units or modules to constitute, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present invention. The above-mentioned units or modules are divided based on logical functions. In actual applications, the functions of one unit (or module) are implemented by multiple units (or modules), or the functions of multiple units (or modules) are implemented by one unit (or module).

[0078] It can be seen that a vehicle-to-vehicle charging and discharging device described in an embodiment of the present application first obtains the difference between the voltage of the first vehicle and the voltage of the target interface. When the difference between the voltage of the first vehicle and the voltage of the target interface is greater than the first difference, the first motor and the second motor are charged through the energy storage unit, the connection between the energy storage unit and the first motor and the second motor is disconnected, the target interface is connected to the first motor and the second motor, and the second vehicle is charged through the first magnetic storage unit and the second magnetic storage unit. When the difference between the voltage of the first vehicle and the voltage of the target interface is less than the second difference, the first motor and the second motor are charged through the energy storage unit, the target interface is connected to the first motor and the second motor, and the second vehicle is charged through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for connection with the second vehicle. In this way, in any scenario, the receiving vehicle that urgently needs to be recharged due to battery power does not need mobile charging piles and portable charging equipment. The new energy vehicle's own energy storage module can be used to charge the receiving vehicle, reducing the inconvenience of carrying portable charging equipment. By solving the voltage mismatch problem in the power supply process, fast and efficient charging can be achieved, which can quickly realize vehicle road rescue and improve user experience.

[0079] See also Figure 6 , Figure 6 is a structural schematic diagram of another vehicle-to-vehicle charging and discharging device proposed in an embodiment of the present application, such as Figure 6 As shown, the vehicle-to-vehicle charging and discharging device 600 includes a processor 610, a memory 620, and a communication interface 630. The memory 620 stores one or more programs 621. The one or more programs 621 are configured to be executed by the processor 610. The processor 610 is also used to execute the following instructions:

[0080] Obtaining a difference between a voltage of the first vehicle and a voltage of a target interface;

[0081] When the difference between the voltage of the first vehicle and the voltage of the target interface is greater than a first difference, charging the first motor and the second motor through the energy storage unit;

[0082] Disconnecting the energy storage unit from the first motor and the second motor, connecting the target interface to the first motor and the second motor, and charging the second vehicle through the first magnetic storage unit and the second magnetic storage unit;

[0083] When the difference between the voltage of the first vehicle and the voltage of the target interface is less than a second difference, charging the first motor and the second motor through the energy storage unit;

[0084] Connect the target interface with the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for connecting to a second vehicle.

[0085] The processor 610, the memory 620, and the communication interface 630 are interconnected and perform communication work with each other.

[0086] The memory 620 may be a volatile memory such as a dynamic random access memory DRAM, or a non-volatile memory such as a mechanical hard disk. The memory is used to store a set of executable program codes, and the processor is used to call the executable program codes stored in the memory, and may execute part or all of the steps of any energy data management method recorded in the above energy data management method embodiment.

[0087] It can be understood that the functions of each program module of the vehicle-to-vehicle charging and discharging device of this embodiment can be specifically implemented according to the method in the above method embodiment, and its specific implementation process can refer to the relevant description of the above method embodiment, which will not be repeated here.

[0088] For details, please refer to Figure 4The device also includes: a first motor, the first motor includes a first magnetic storage unit, a first interface of the first motor, a second interface of the first motor, and a third interface of the first motor, the first magnetic storage unit includes a first winding W1, a second winding W2, and a third winding W3, one end of the first winding W1, one end of the second winding W2, and one end of the third winding W3 are connected to the first interface of the first motor, and the first motor also includes a first inverter circuit; the first inverter circuit includes a first upper bridge circuit, a first lower bridge circuit, a second upper bridge circuit, a second lower bridge circuit, a third upper bridge circuit, and a third lower bridge circuit, the first upper bridge circuit and the first lower bridge circuit are connected in series, the second upper bridge circuit and the second lower bridge circuit are connected in series, and the third upper bridge circuit and the third lower bridge circuit are connected in series; the first upper bridge circuit includes a first transistor Q1, the second upper bridge circuit includes a second transistor Q2, and the third upper bridge circuit includes a third transistor Q3; one end of the first transistor Q1, the second transistor Q2, and the third transistor Q3 are connected to the first interface of the first motor, the other end of the first transistor Q1 is connected to one end of the first winding W1, the other end of the second transistor Q2 is connected to one end of the second winding W2, and the other end of the third transistor Q3 is connected to one end of the third winding W3; the first lower bridge circuit includes a fourth transistor Q4, the second lower bridge circuit includes a fifth transistor Q5, and the third lower bridge circuit includes a sixth transistor Q6; one end of the fourth transistor Q4, the fifth transistor Q5, and the sixth transistor Q6 are connected to the third interface of the first motor, the other end of the fourth transistor Q4 is connected to one end of the first winding W1, the other end of the fifth transistor Q5 is connected to one end of the second winding W2, and the other end of the sixth transistor is connected to one end of the third winding W3.

[0089] Among them, the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, and the sixth transistor Q6 can be insulated gate bipolar transistors (IGBT). The function of IGBT is to convert AC and DC, and IGBT also has the function of high and low voltage conversion. When the energy storage unit is discharged, the IGBT converts DC into AC used by the AC motor. IGBT has the advantages of energy saving and easy installation and maintenance.

[0090] For details, please refer to Figure 4, the device also includes: a second motor, the second motor includes a second magnetic storage unit, a first interface of the second motor, a second interface of the second motor, and a third interface of the second motor, the second magnetic storage unit includes a fourth winding W4, a fifth winding W5, and a sixth winding W6, one end of the fourth winding W4, one end of the fifth winding W5, and one end of the sixth winding W6 are connected to the second interface of the second motor, and the second motor also includes a second inverter circuit; the second inverter circuit includes a fourth upper bridge circuit, a fourth lower bridge circuit, a fifth upper bridge circuit, a fifth lower bridge circuit, a sixth upper bridge circuit, and a sixth lower bridge circuit, the fourth upper bridge circuit and the fourth lower bridge circuit are connected in series, the fifth upper bridge circuit and the fifth lower bridge circuit are connected in series, and the sixth upper bridge circuit and the sixth lower bridge circuit are connected in series; the fourth upper bridge circuit includes a seventh transistor Q7, the fifth upper bridge circuit includes an eighth transistor Q8, and the sixth upper bridge circuit includes a ninth transistor Q9; the One end of the seventh transistor Q7, the eighth transistor Q8, and the ninth transistor Q9 are connected to the first interface of the second motor, the other end of the seventh transistor Q7 is connected to one end of the fourth winding W4, the other end of the eighth transistor Q8 is connected to one end of the fifth winding W5, and the other end of the ninth transistor Q9 is connected to one end of the sixth winding W6; the fourth lower bridge circuit includes a tenth transistor Q10, the fifth lower bridge circuit includes an eleventh transistor Q11, and the sixth lower bridge circuit includes a twelfth transistor Q12; one end of the tenth transistor Q10, the eleventh transistor Q11, and the twelfth transistor Q12 are connected to the third interface of the second motor, the other end of the tenth transistor Q10 is connected to one end of the fourth winding W4, the other end of the eleventh transistor Q11 is connected to one end of the fifth winding W5, and the other end of the twelfth transistor Q12 is connected to one end of the sixth winding W6.

[0091] Among them, the seventh transistor Q7, the eighth transistor Q8, the ninth transistor Q9, the tenth transistor Q10, the eleventh transistor Q11, and the twelfth transistor Q12 may be IGBTs.

[0092] Among them, when the first switch K1, the second switch K2, and the third switch K3 are controlled to be in a connected state, the fourth switch K4 and the fifth switch K5 are disconnected, and the electric energy of the energy storage unit passes through the first switch K1, flows through the multiple upper bridge circuits of the first motor, the multiple windings of the first motor and the multiple windings of the second motor, and then flows through the multiple lower bridge circuits of the second motor, and returns to the energy storage unit through the second switch K2 to form a closed loop. The above-mentioned multiple upper bridge circuits can include one, two, or three, which can be any one or a combination of several upper bridge circuits, and the multiple lower bridge circuits can include one, two, or three, which can be any one or a combination of several lower bridge circuits. The multiple windings are the windings corresponding to each upper bridge circuit or lower bridge circuit that is turned on, which is not limited here.

[0093] For example, when the first switch K1, the second switch K2, and the third switch K3 are controlled to be in a connected state, and the fourth switch K4 and the fifth switch K5 are disconnected, the electric energy of the energy storage unit passes through the first switch K1, flows through the first transistor Q1, the second transistor Q2, and the third transistor Q3 of the first motor, and the first winding W1, the second winding W2, and the third winding W3 corresponding to each transistor, and passes through the third switch K3, flows through the fourth winding W4, the fifth winding W5, and the sixth winding W6, and the tenth transistor Q10, the eleventh transistor Q11, and the twelfth transistor Q12 corresponding to each winding, and returns to the energy storage unit through the second switch K2 to form a loop in a connected state, charging the first winding W1, the second winding W2, the third winding W3, the fourth winding W4, the fifth winding W5, and the sixth winding W6.

[0094] Among them, when the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 are controlled to be in a connected state, the electric energy of the energy storage unit passes through the first switch K1, flows through the multiple upper bridge circuits of the first motor, the multiple windings of the first motor and the multiple windings of the second motor, and then flows through the multiple upper bridge circuits of the second motor, flows through the fourth switch K4 to reach one end of the target interface, provides voltage for the target interface, and then returns to the energy storage unit through the second switch K2 to form a closed loop. The above-mentioned multiple upper bridge circuits can include one, two, or three, and can be any one or a combination of several upper bridge circuits. The multiple lower bridge circuits can include one, two, or three, and can be any one or a combination of several lower bridge circuits. The multiple windings are windings corresponding to each upper bridge circuit or lower bridge circuit that is turned on, and are not limited here.

[0095] Among them, when the first switch K1 is controlled to be disconnected, the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 are in a connected state, and the electric energy of the energy storage unit cannot be supplied, the electric energy stored in the first motor and the second motor flows through the multiple upper bridge circuits of the second motor, flows through the fourth switch K4 to reach one end of the target interface, provides voltage for the target interface, and then flows through the multiple lower bridge circuits of the first motor back to the first motor to form a closed loop. The above-mentioned multiple upper bridge circuits can include one, two, or three, and can be any one or a combination of several upper bridge circuits. The multiple lower bridge circuits can include one, two, or three, and can be any one or a combination of several lower bridge circuits, which are not limited here.

[0096] Among them, the first motor and the second motor respectively include three windings, which means that the first motor and the second motor are three-phase motors. In the specific implementation, the first motor and the second motor can also be other phase motors, such as two-phase motors, single-phase motors, and five-phase motors. There is no limitation here, but the use of three-phase motors has more advantages in power and power conversion, and although the five-phase has more advantages in distribution characteristics, the improvement is not significant for the three-phase. The three-phase is sufficient to meet the current conversion needs and is more cost-effective. In addition, the instantaneous power of the three-phase motor is constant, which can extend the life of the energy storage unit.

[0097] It can be seen that through the above-mentioned circuit connection method, the boost and buck discharge of the vehicle-to-vehicle charging and discharging device 600 can be realized. In this way, in any scenario, the receiving vehicle that urgently needs to be recharged due to battery power feed does not need mobile charging piles and portable charging equipment. The new energy vehicle’s own energy storage module can be used to charge the receiving vehicle for vehicle-to-vehicle charging, reducing the inconvenience of carrying portable charging equipment. By solving the voltage mismatch problem in the power supply process, fast and efficient charging can be achieved, which can quickly realize vehicle road rescue and improve user experience.

[0098] In one possible embodiment, please refer again to Figure 4 , Figure 4 A circuit diagram of vehicle-to-vehicle charging and discharging proposed in an embodiment of the present application is shown in FIG. Figure 4 As shown, the device also includes: a first capacitor C1 and a second capacitor C2, the first capacitor C1 is connected in parallel with the energy storage unit, the second capacitor C2 is connected in parallel with the target interface, the two ends of the first capacitor C1 are respectively connected to the first interface of the first motor and the third interface of the first motor, the two ends of the second capacitor C2 are respectively connected to the first interface of the second motor and the third interface of the second motor, and the first capacitor C1 and the second capacitor C2 are used to protect the circuit.

[0099] It can be seen that in this embodiment, capacitors are used to protect the circuit, which reduces the possibility of damage to the motor and battery caused by circuit short circuit, thereby ensuring the safety of the vehicle.

[0100] In one possible embodiment, see Figure 7 , Figure 7 This is another circuit diagram of vehicle-to-vehicle charging and discharging proposed in an embodiment of the present application. The vehicle-to-vehicle charging and discharging circuit also includes a sixth switch K6, which connects the first interface of the first motor and the first interface of the second motor. When the sixth switch K6 is in a connected state, the first motor and the second motor are connected in parallel, and the energy storage unit directly supplies power to the target interface.

[0101] Among them, when the sixth switch K6 is in a connected state, the first motor and the second motor are connected in parallel, and the current flows out of the energy storage unit and directly passes through the sixth switch K6 and the fourth switch K4 to reach one end of the target interface, which can directly power the target interface. However, at this time, due to direct power supply, the current is the direct current provided by the energy storage unit, and the direct current cannot be directly used for vehicle-to-vehicle charging and discharging.

[0102] It can be seen that in the embodiment of the present application, the vehicle-to-vehicle charging and discharging circuit can also provide DC power supply, and power supply in various situations can be achieved by controlling the switch. The circuit has high reusability, which makes the overall circuit size small, improves convenience, can meet various user needs, and is conducive to improving user experience.

[0103] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps of any method described in the above method embodiments, and the above computer includes an electronic device.

[0104] The embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, the computer program is operable to cause a computer to execute some or all of the steps of any method described in the method embodiment. The computer program product may be a software installation package, and the computer includes an electronic device.

[0105] See also Figure 8 , Figure 8 This is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The embodiment of the present application also provides a vehicle 800, including the vehicle-to-vehicle charging and discharging device 500 described in any of the above embodiments, or including the vehicle-to-vehicle charging and discharging device 600.

[0106] In a possible embodiment, the vehicle 800 may include any one or both of the vehicle-to-vehicle charging and discharging device 500 or the vehicle-to-vehicle charging and discharging device 600 .

[0107] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0108] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0109] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0110] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0111] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0112] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer electronic device (which can be a personal computer, electronic device or network electronic device, etc.) to perform all or part of the steps of the above-mentioned methods of each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0113] A person skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, and the memory can include: a flash drive, a read-only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, etc.

[0114] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A vehicle-to-vehicle charging and discharging method, characterized in that: Applied to a first vehicle, the vehicle-to-vehicle charging and discharging method comprises: Acquire a difference between a voltage of the first vehicle and a voltage of a target interface; When the difference between the voltage of the first vehicle and the voltage of the target interface is greater than a first difference, charging the first motor and the second motor through the energy storage unit; Disconnecting the energy storage unit from the first motor and the second motor, connecting the target interface to the first motor and the second motor, and charging the second vehicle through the first magnetic storage unit and the second magnetic storage unit; When the difference between the voltage of the first vehicle and the voltage of the target interface is less than a second difference, charging the first motor and the second motor through the energy storage unit; Connect the target interface with the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for connecting to a second vehicle.

2. The method according to claim 1, characterized in that When the energy storage unit charges the first motor and the second motor and discharges the first motor and the second motor, the energy storage unit is connected to the first interface of the first motor, the second interface of the first motor is connected to the second interface of the second motor, and the first interface of the second motor is connected to the target interface.

3. The method according to claim 1, characterized in that The method further comprises: When the first motor and the second motor are charged through the energy storage unit, the connection between the target interface and the first magnetic storage unit and the second magnetic storage unit is disconnected.

4. The method according to claim 1, characterized in that The method further comprises: When the electric quantity of the first magnetic storage unit and the second magnetic storage unit reaches an electric quantity threshold, the connection between the energy storage unit and the first motor and the second motor is disconnected.

5. The method according to claim 1, characterized in that The method further includes: when the difference between the total voltage output by the first magnetic storage unit and the second magnetic storage unit and the voltage of the target interface is less than a second difference, charging the first magnetic storage unit and the second magnetic storage unit through the energy storage unit.

6. The method according to claim 1, characterized in that include: When the first motor and the second motor are charged by the energy storage unit, the first switch, the second switch and the third switch are in a connected state, and the fourth switch and the fifth switch are in a disconnected state; When discharging to the target interface through the first motor, the second motor and the energy storage unit, the first switch, the second switch, the third switch, the fourth switch and the fifth switch are in a connected state; When discharging to the target interface through the first motor and the second motor, the first switch is in a disconnected state, and the second switch, the third switch, the fourth switch, and the fifth switch are in a connected state; Among them, the first switch is located between the first interface of the energy storage unit and the first interface of the first motor, the second switch is located between the second interface of the energy storage unit and the third interface of the first motor, the third switch is located between the second interface of the first motor and the second interface of the second motor, the fourth switch is located between the first interface of the second motor and the target interface, the fifth switch is located between the third interface of the second motor and the target interface, and the third interface of the first motor is connected to the third interface of the second motor.

7. A vehicle-to-vehicle charging and discharging device, characterized in that: include: An acquisition module, used for acquiring a difference between a voltage of the first vehicle and a voltage of a target interface; a first charge and discharge control module, configured to charge the first motor and the second motor through an energy storage unit when a difference between a voltage of the first vehicle and a voltage of the target interface is greater than a first difference; a second charge and discharge control module, configured to disconnect the energy storage unit from the first motor and the second motor, connect the target interface to the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit and the second magnetic storage unit; a third charge and discharge control module, configured to charge the first motor and the second motor through the energy storage unit when the difference between the voltage of the first vehicle and the voltage of the target interface is less than a second difference; A fourth charge and discharge control module is used to connect the target interface with the first motor and the second motor, and charge the second vehicle through the first magnetic storage unit, the second magnetic storage unit and the energy storage unit, wherein the first vehicle includes an energy storage unit, a target interface, a first motor, and a second motor, the first motor includes a first magnetic storage unit, the second motor includes a second magnetic storage unit, the energy storage unit is connected to the first motor and the second motor, and the target interface is suitable for being connected to a second vehicle.

8. A vehicle-to-vehicle charging and discharging device, characterized in that: Applied to a first vehicle, the device includes a processor, a memory, and a communication interface, the memory stores one or more programs, the one or more programs are configured to be executed by the processor, the processor is also used to execute the steps in the method described in any one of claims 1 to 6, and the one or more programs include instructions for executing the steps in the method described in any one of claims 1 to 6.

9. The device according to claim 8, characterized in that The device further includes: a first motor, the first motor including a first magnetic storage unit, a first interface of the first motor, a second interface of the first motor, and a third interface of the first motor, the first magnetic storage unit including a first winding, a second winding, and a third winding, one end of the first winding, one end of the second winding, and one end of the third winding are all connected to the first interface of the first motor, and the first motor further includes a first inverter circuit; The first inverter circuit includes a first upper bridge circuit, a first lower bridge circuit, a second upper bridge circuit, a second lower bridge circuit, a third upper bridge circuit, and a third lower bridge circuit, wherein the first upper bridge circuit and the first lower bridge circuit are connected in series, the second upper bridge circuit and the second lower bridge circuit are connected in series, and the third upper bridge circuit and the third lower bridge circuit are connected in series; The first upper bridge circuit includes a first transistor, the second upper bridge circuit includes a second transistor, and the third upper bridge circuit includes a third transistor; One end of the first transistor, the second transistor, and the third transistor is connected to the first interface of the first motor, the other end of the first transistor is connected to one end of the first winding, the other end of the second transistor is connected to one end of the second winding, and the other end of the third transistor is connected to one end of the third winding; The first lower bridge circuit includes a fourth transistor, the second lower bridge circuit includes a fifth transistor, and the third lower bridge circuit includes a sixth transistor; One end of the fourth transistor, the fifth transistor, and the sixth transistor is connected to the third interface of the first motor, the other end of the fourth transistor is connected to one end of the first winding, the other end of the fifth transistor is connected to one end of the second winding, and the other end of the sixth transistor is connected to one end of the third winding.

10. The device according to claim 8, characterized in that The device further includes: a second motor, the second motor including a second magnetic storage unit, a first interface of the second motor, a second interface of the second motor, and a third interface of the second motor, the second magnetic storage unit including a fourth winding, a fifth winding, and a sixth winding, one end of the fourth winding, one end of the fifth winding, and one end of the sixth winding are all connected to the first interface of the second motor, and the second motor further includes a second inverter circuit; The second inverter circuit includes a fourth upper bridge circuit, a fourth lower bridge circuit, a fifth upper bridge circuit, a fifth lower bridge circuit, a sixth upper bridge circuit, and a sixth lower bridge circuit, wherein the fourth upper bridge circuit and the fourth lower bridge circuit are connected in series, the fifth upper bridge circuit and the fifth lower bridge circuit are connected in series, and the sixth upper bridge circuit and the sixth lower bridge circuit are connected in series; The fourth upper bridge circuit includes a seventh transistor, the fifth upper bridge circuit includes an eighth transistor, and the sixth upper bridge circuit includes a ninth transistor; One end of the seventh transistor, the eighth transistor, and the ninth transistor is connected to the first interface of the second motor, the other end of the seventh transistor is connected to one end of the fourth winding, the other end of the eighth transistor is connected to one end of the fifth winding, and the other end of the ninth transistor is connected to one end of the sixth winding; The fourth lower bridge circuit includes a tenth transistor, the fifth lower bridge circuit includes an eleventh transistor, and the sixth lower bridge circuit includes a twelfth transistor; One end of the tenth transistor, the eleventh transistor, and the twelfth transistor is connected to the third interface of the second motor, the other end of the tenth transistor is connected to one end of the fourth winding, the other end of the eleventh transistor is connected to one end of the fifth winding, and the other end of the twelfth transistor is connected to one end of the sixth winding.

11. The device according to any one of claims 8 to 10, characterized in that: The device also includes: a first capacitor and a second capacitor, the first capacitor is connected in parallel with the energy storage unit, the second capacitor is connected in parallel with the target interface, the two ends of the first capacitor are respectively connected to the first interface of the first motor and the third interface of the first motor, the two ends of the second capacitor are respectively connected to the first interface of the second motor and the third interface of the second motor, and the first capacitor and the second capacitor are used to protect the circuit.

12. A computer-readable storage medium, characterized in that: A computer program / instruction is stored thereon, and the computer program / instruction is executed by a processor to implement the steps of the method according to any one of claims 1 to 6.

13. A vehicle, characterized in that: It includes a vehicle-to-vehicle charging and discharging device as described in claim 7, or includes a vehicle-to-vehicle charging and discharging device as described in any one of claims 8-11.

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