Vehicle charging control method and device, vehicle charging system and vehicle

Abstract

The present disclosure provides a vehicle charging control method and device, a vehicle charging system and a vehicle. The vehicle includes M charging ports and N switch units, wherein the positive and negative electrodes of each charging port are connected with a switch unit respectively, M is an integer greater than 1; the method comprises: after at least one external charging device is connected with at least one charging port, the number of switch units that have sintering is obtained; according to the number, the external charging device is controlled to charge or power off the charging port, or the external charging device is controlled not to charge the charging port according to the number. The method can control the external charging device to charge or power off the charging port according to the number of switch units that have sintering when the vehicle is charging with multiple guns, or control the external charging device not to charge the charging port according to the number, so as to ensure the safety of the driver and passenger and meet the normal charging demand.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and in particular to a vehicle charging control method, system, battery manager, and vehicle. Background Technology

[0002] With the continuous development of battery technology in the automotive industry, many pure electric vehicles both domestically and internationally are now capable of high-current, high-power charging exceeding 500A. However, the number of high-current, high-power DC charging stations is limited and cannot meet market demand. To improve charging efficiency, multiple charging ports are installed on the vehicle, but this raises certain safety concerns when charging through multiple ports. Summary of the Invention

[0003] The purpose of this disclosure is to provide a vehicle charging control method, device, vehicle charging system, and vehicle, so as to ensure the safety of passengers and meet normal charging needs in the event of sintering of the switching unit when the vehicle is charging with multiple guns.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a vehicle charging control method. The vehicle includes M charging ports and N switching units, wherein the positive and negative terminals of each charging port are respectively connected to one of the switching units, and M is an integer greater than 1. The method includes: after at least one external charging device is connected to at least one charging port, obtaining the number of switching units among the N switching units that have undergone sintering; controlling the external charging device to charge or de-energize the charging port according to the number, or controlling the external charging device not to charge the charging port according to the number.

[0005] To achieve the above objectives, a second aspect of this disclosure provides a vehicle charging control device, which includes a memory, a processor, and a computer program stored in the memory. When the computer program is executed by the processor, it implements the vehicle charging control method described above.

[0006] To achieve the above objectives, a third aspect of this disclosure provides a vehicle charging system, comprising: a power battery; a positive main contactor and a negative main contactor, both connected to the power battery; M charging ports, each connected to the power battery via the positive and negative main contactors, wherein M is an integer greater than 1; N switching units, the positive terminal of each charging port connected to the positive main contactor via one of the switching units, and the negative terminal of each charging port connected to the negative main contactor via one of the switching units; and the apparatus described in the second aspect of the disclosure, wherein the apparatus is connected to the charging ports and the switching units.

[0007] To achieve the above objectives, a fourth aspect of this disclosure provides a vehicle comprising:

[0008] The vehicle charging system described in the third aspect of the above embodiment.

[0009] The vehicle charging control method, device, vehicle charging system, and vehicle disclosed herein can realize multi-gun charging of the vehicle, and can control the charging status of the external charging equipment to the charging port according to the number of sintered switch units in the event of switch unit sintering, so as to ensure the safety of the driver and passengers and meet normal charging needs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a vehicle charging structure according to an embodiment of the present disclosure;

[0011] Figure 2 This is a flowchart of a vehicle charging control method according to an embodiment of the present disclosure;

[0012] Figure 3 This is a communication diagram in the charging control of one embodiment of the present disclosure;

[0013] Figure 4 This is a flowchart of a vehicle charging control method according to another embodiment of the present disclosure;

[0014] Figure 5 This is a structural diagram of the battery manager according to an embodiment of the present disclosure;

[0015] Figure 6 This is a schematic diagram of the structure of a vehicle according to an embodiment of the present disclosure;

[0016] Figure 7 This is a schematic diagram of the structure of a vehicle according to another embodiment of this disclosure;

[0017] Figure 8 This is a schematic diagram of the structure of a vehicle charging control system according to an embodiment of the present disclosure. Detailed Implementation

[0018] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0019] The vehicle charging control method, apparatus, vehicle charging control device, and vehicle proposed in the embodiments of this disclosure are described below with reference to the accompanying drawings.

[0020] In embodiments of this disclosure, the vehicle includes M charging ports and N switching units. The positive and negative terminals of each charging port are respectively connected to one switching unit, where M is an integer greater than 1, and N = 2*M. The switching units may include contactors. Taking two charging ports, with each charging port having a contactor corresponding to its positive and negative terminals, as an example... Figure 1 As shown, the two charging ports are designated as charging port 13 and charging port 14. Contactors K1 and K2 are provided for charging port 13, and contactors K3 and K4 are provided for charging port 14. The positive terminal of charging port 13 is connected to the positive terminal of the vehicle's power battery 20 via contactor K1, and the negative terminal of charging port 13 is connected to the negative terminal of the power battery 20 via contactor K2. The positive terminal of charging port 14 is connected to the positive terminal of the power battery 20 via contactor K3, and the negative terminal of charging port 14 is connected to the negative terminal of the power battery 20 via contactor K4. Figure 1 The four contactors in the system ensure that the dual-gun DC charging can be performed independently.

[0021] In some embodiments, see Figure 1 The positive terminal of the power battery 20 is connected to a positive main contactor K+, and the negative terminal is connected to a negative main contactor K-. The positive main contactor K+ may also be connected in parallel to a pre-charging circuit, which may include a pre-charging contactor K0 and a pre-charging resistor R0 connected in series.

[0022] Figure 2 This is a flowchart of a vehicle charging control method according to an embodiment of the present disclosure.

[0023] This vehicle charging control method is executed by the vehicle charging control device. For example... Figure 2 As shown, the vehicle charging control method includes:

[0024] S21, after at least one external charging device is connected to at least one charging port, obtain the number of switching units that have undergone sintering among the N switching units.

[0025] In some embodiments, a sintering detection signal of a switching unit can be acquired, and the number of sintered switching units can be obtained based on the sintering detection signal.

[0026] The sintering detection signal can be sent by the vehicle's on-board charger.

[0027] It should be noted that the on-board charger can be woken up when the charging gun is plugged into any charging port, and the on-board charger can trigger the vehicle charging control device to execute step S21.

[0028] As one implementation method, such as Figure 3As shown, when a charging gun is inserted into a charging port, the on-board charger can detect the insertion signal to determine the charging port into which the charging gun is inserted, as well as the connection status between the charging gun and the charging port, and establish a communication connection with the charging equipment (such as a charging pile). The charging gun is part of the charging equipment. After detecting a DC charging gun insertion signal at any charging port, the on-board charger automatically wakes up and sends the corresponding insertion signal to the BMC (Battery Management Controller) to wake up the BMC (i.e., the vehicle charging control device mentioned above).

[0029] by Figure 1 Taking the structure shown as an example, after the on-board charger wakes up, it detects the sintering status of contactors K1, K2, K3, and K4, and sends the detected sintering status signals of K1, K2, K3, and K4 to the BMC. Figure 1 In the structure shown, voltage sampling points can be pre-set for the sintering detection of each contactor. The on-board charger can control the contactor to close and open, detect the voltage at the corresponding sampling points, and determine whether the contactor is sintered based on the voltage changes. As an example, the on-board charger can only perform sintering status detection on the contactor corresponding to the charging port that detects the plug-in signal.

[0030] S22, control the external charging device to charge or de-energize the charging port according to the quantity, or control the external charging device not to charge the charging port according to the quantity.

[0031] Controlling the external charging device to charge or disconnect the charging port can occur during the process of the external charging device charging the vehicle's power battery through the charging port. Charging occurs when charging is needed, and disconnection occurs when charging needs to be stopped. Prohibiting the external charging device from charging the charging port includes controlling the external charging device not to charge the vehicle's power battery through the charging port even if charging is needed.

[0032] Specifically, the control method for the charging port varies depending on the number of sintered switching units. For example, if the number is zero, there is no safety hazard due to sintering. In this case, the external charging device can be controlled to charge the charging port according to the order of insertion of the charging guns. After charging is complete, the external charging device can be controlled to stop charging the charging port (i.e., power off; the order of power off is not limited). On the other hand, if a large number of units are sintered, and both switching units connected to a charging port are sintered, continuing to control the external charging device to charge the charging port may pose a safety hazard. Therefore, such charging ports are not charged to ensure charging safety. Furthermore, if a small number of units are sintered, and one of the two switching units connected to a charging port is sintered, the external charging device can still be controlled to charge the charging port corresponding to the other unsintered switching unit to ensure charging efficiency.

[0033] Taking a device with two charging ports and four switching units as an example, see [link / reference]. Figure 1 If both charging ports are connected to a charging pile, the BMC can determine the connection based on the received plug-in signal and determine whether the contactors K1, K2, K3, and K4 corresponding to the two charging ports have sintered based on the contactor sintering detection signal. The determination result may include that one or more of contactors K1, K2, K3, and K4 have sintered, such as K1 sintering, or K2 and K3 sintering, etc., and the charging control strategy can be set according to the contactor sintering status.

[0034] When only the contactor corresponding to charging port 13 or charging port 14 is sintered, one charging control strategy is applied; when the contactors corresponding to charging port 13 and charging port 14 are not sintered, another charging control strategy is applied; when the contactors corresponding to charging port 13 and charging port 14 are sintered, yet another charging control strategy is applied. Thus, based on the judgment result, the corresponding charging control strategy can be selected to control the external charging device to charge or de-energize the charging port, or to prohibit the external charging device from charging the charging port.

[0035] Therefore, this method can ensure the safety of passengers and meet normal charging needs even when the switching unit in the charging circuit corresponding to the charging port is sintered during multi-gun charging of a vehicle.

[0036] In some embodiments, controlling the external charging device to charge or de-energize the charging port based on the quantity may include: when the quantity is zero, controlling the external charging device to charge or de-energize the charging port connected to it.

[0037] Specifically, a quantity of zero indicates that the switching unit connected to the charging port is not sintered. In this case, when charging needs to begin, the external charging device can be controlled to charge the connected charging port normally; and when charging needs to end, the external charging device can be controlled to cut off the power to the connected charging port. This ensures both charging safety and charging efficiency.

[0038] In some embodiments, controlling an external charging device to charge the charging port may include: sending a charging permission message to the charging device corresponding to the charging port to allow the corresponding charging device to charge the vehicle through the charging port. Controlling an external charging device to de-energize the charging port may include: sending a charging prohibition message to the charging device corresponding to the charging port to prohibit the corresponding charging device from charging the vehicle through the charging port.

[0039] The following is based on Figure 1 The vehicle shown includes two charging ports and four switching units, corresponding to two external charging devices (referred to as the first charging device and the second charging device, respectively). Taking this as an example, the vehicle charging control method of this embodiment will be described:

[0040] In the first example, when the quantity is zero, the external charging device is controlled to charge or de-energize the charging port connected to it.

[0041] For example, see Figure 1 If both charging guns are connected to the charging port and neither of the positive nor negative contactors of the charging ports shows any signs of sintering (i.e., the number of sintered contacts is zero), then the BMC sends a charging permission command to DC charging pile A and DC charging pile B to allow DC charging pile A and DC charging pile B to charge the vehicle.

[0042] In the second example, controlling the external charging device to charge or de-energize the charging port according to the quantity, or controlling the external charging device not to charge the charging port according to the quantity, includes: when the quantity is equal to 1, obtaining the connection status of two external charging devices with two charging ports; controlling the external charging device to charge or de-energize the charging port connected to it according to the connection status, or controlling the external charging device not to charge the charging port connected to it according to the connection status.

[0043] In this example, as one implementation, controlling an external charging device to charge or de-energize a charging port connected to it based on the connection status includes: determining the charging port where the sintering switch unit is located as the target charging port based on sintering detection information; when the target charging port is connected to the first charging device and the other charging port is not connected to the second charging device, controlling the first charging device to charge or de-energize the target charging port.

[0044] Specifically, the two charging ports are referred to as the first charging port and the second charging port. If the first charging port is the target charging port and the second charging port is another charging port, and the first charging port meets the target requirements (i.e., the first charging port is connected to the first charging device), while the second charging port does not meet the target requirements (i.e., the second charging port is not connected to the second charging device), then the vehicle can only be charged by the first charging device through the first charging port. In this case, when charging is needed, the first charging device is controlled to charge the first charging port; when charging needs to be stopped, the first charging device is controlled to disconnect the power to the first charging port.

[0045] As another embodiment, controlling an external charging device to charge or de-energize its connected charging port based on the connection status includes: when a target charging port is connected to a first charging device and another charging port is connected to a second charging device, first controlling the first charging device to charge the target charging port, and then controlling the second charging device to charge the other charging port; when a target charging port is connected to the first charging device and another charging port is connected to the second charging device, first controlling the second charging device to de-energize the other charging port, and then controlling the first charging device to de-energize the target charging port.

[0046] Specifically, if both the first charging port and the second charging port meet the target requirements, a charging permission message is sent to the first charging device corresponding to the first charging port to allow the first charging device to charge the vehicle through the first charging port, and a charging prohibition message is sent to the second charging device corresponding to the second charging port to prohibit the second charging device from charging the vehicle through the second charging port. After the first charging port transmits electrical energy to the vehicle, a charging permission message is sent to the second charging device corresponding to the second charging port to allow the second charging device to charge the vehicle through the second charging port. When charging is complete, before sending a charging end message to the first charging device corresponding to the first charging port, it is determined whether the second charging port is transmitting electrical energy to the vehicle; if so, a charging end message is sent to the second charging device corresponding to the second charging port. After the second charging port finishes transmitting electrical energy to the vehicle, a charging end message is sent to the first charging device corresponding to the first charging port.

[0047] For example, see Figure 1 If the contactor corresponding to charging port 13 undergoes sintering, but the contactor corresponding to charging port 14 does not, the BMC sends a charging permission message to charging pile A corresponding to charging port 13 to allow charging pile A to charge the vehicle, and sends a charging prohibition message to charging pile B corresponding to charging port 14 to prohibit charging pile B from charging the vehicle. Afterwards, if charging pile A is detected charging the vehicle, and if energy transfer between charging pile A and the vehicle is detected, the BMC sends a charging permission message to charging pile B corresponding to charging port 14; otherwise, it continuously sends charging prohibition messages to charging pile B corresponding to charging port 14. When the power battery is detected to be fully charged, charging must be terminated. At this time, the BMC can first send a charging termination message to charging pile B corresponding to charging port 14 to allow charging pile B to terminate charging the vehicle first. After charging pile B terminates charging the vehicle, it then sends a charging termination message to charging pile A corresponding to charging port 13.

[0048] Therefore, even when both guns are inserted and only one contactor corresponding to a charging port is sintered, the dual-gun DC charging function can still be achieved, ensuring the user's normal charging needs.

[0049] As another embodiment, controlling an external charging device to prevent it from charging a connected charging port based on the connection status includes: when the target charging port is not connected to the first charging device, and another charging port is connected to the second charging device, then prohibiting the second charging device from charging the other charging port. This avoids charging hazards caused by sintering and ensures the safety of drivers and passengers.

[0050] In the third example, when the quantity is greater than or equal to 2, external charging devices are prohibited from charging any of the charging ports.

[0051] It should be noted that, see Figure 1The number of cases must be greater than or equal to two, including cases where sintering occurs at the same charging port and cases where sintering occurs at different charging ports. When the number is equal to two, prohibiting external charging devices from charging at any one of the charging ports means that when sintering occurs at different charging ports, the BMC can send charging prohibition messages to all charging devices corresponding to the target charging ports to ensure safety. However, when two sintering events occur at the same charging port, the existing single-gun charging control strategy can be used to control external charging devices to charge or disconnect the charging port where sintering occurs. Therefore, while ensuring personnel safety, certain charging needs can be met.

[0052] In some embodiments, the vehicle charging control method further includes: controlling an external charging device to prohibit charging of the M charging ports before obtaining the number of switching units that have undergone sintering among the N switching units.

[0053] Specifically, after the BMC is woken up, before receiving the contactor sintering detection signal, it can periodically send charging prohibition messages to all charging devices corresponding to the target charging ports to ensure charging safety.

[0054] Optionally, after receiving the insertion signal, if the cumulative time without receiving the sintering detection signal reaches a preset time, the charging port of the external charging device can be identified, and the corresponding external charging device can be controlled to charge or de-energize the connected charging port to meet the charging requirements. The preset time can be calibrated as needed, for example, within the range of 3 seconds to 1 minute.

[0055] In some embodiments, such as Figure 4 As shown, the vehicle charging control method also includes:

[0056] S31, obtain the charging demand information of the power battery and obtain the output capability information of the target charging device, wherein the target charging device is an external charging device that has received a charging permission message.

[0057] The charging demand information may include the required charging voltage, the output capacity information may include the maximum output voltage and the maximum output current, and the target charging device refers to an external charging device (such as a charging pile) that can charge the charging port or disconnect the power.

[0058] S32 allocates charging capacity to the target charging device based on charging demand information and output capacity information.

[0059] Specifically, BMC can allocate the maximum allowable charging current of each charging pile in real time during charging based on the charging voltage required by the power battery and the maximum output voltage and maximum output current of each charging pile, so as to ensure the maximum charging capacity while avoiding exceeding the capacity of the power battery.

[0060] In some embodiments, a boost circuit may be provided corresponding to at least one charging port. The boost circuit is connected between the power battery and the corresponding charging port. When the charging port connected to the target charging device is provided with a boost circuit, the vehicle charging control method may further include: controlling the boost circuit according to charging demand information and output capacity information. For example, when the output capacity is greater than the charging demand, the boost circuit can be controlled to be fully open to achieve direct charging; when the output capacity is less than the charging demand, the boost circuit can be controlled to boost the voltage to achieve boost charging.

[0061] Specifically, see Figure 1 A boost circuit can be installed between K1, K2 and the power battery 20 to achieve boost control when the charging pile A charges the power battery through the charging port 13. Correspondingly, a boost circuit can also be installed between K3, K4 and the power battery 20; or a boost circuit can be installed simultaneously between K1, K2 and the power battery 20, and also between K3, K4 and the power battery 20.

[0062] Figure 5 This is a structural diagram of a vehicle charging control device according to an embodiment of the present disclosure.

[0063] like Figure 5 As shown, the vehicle charging control device 500 includes a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, for example, via a bus 502. Optionally, the vehicle charging control device 500 may also include a transceiver 504. It should be noted that in practical applications, the transceiver 504 is not limited to one type, and the structure of this vehicle charging control device 500 does not constitute a limitation on the embodiments of the present invention.

[0064] Processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this invention. Processor 501 may also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0065] Bus 502 may include a pathway for transmitting information between the aforementioned components. Bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 502 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0066] The memory 503 stores a computer program corresponding to the vehicle charging control method of the above embodiments of the present invention. This computer program is executed by the processor 501. The processor 501 executes the computer program stored in the memory 503 to implement the content shown in the aforementioned method embodiments.

[0067] Figure 6 This is a structural diagram of a vehicle charging system according to an embodiment of the present disclosure.

[0068] like Figure 6 As shown, the vehicle charging system 200 includes: a power battery 20, M charging ports 10, N switching units, a positive main contactor K+, a negative main contactor K-, and the device 500 described in the above embodiment.

[0069] See Figure 6 Both the positive main contactor K+ and the negative main contactor K- are connected to the power battery 20; each charging port 10 is connected to the power battery 20 through the positive main contactor K+ and the negative main contactor K-, where M is an integer greater than 1; the positive terminal of each charging port 10 is connected to the positive main contactor K+ through a switching unit 30, and the negative terminal of each charging port 10 is connected to the negative main contactor K- through a switching unit 30; the device 500 is connected to the charging port 10 and the switching unit 30.

[0070] In some embodiments, such as Figure 7 As shown, the vehicle charging system 200 may further include: one or more boost circuits 40, each corresponding to one or more charging ports 10, wherein the boost circuits 40 are connected between the power battery 20 and the corresponding charging port 10; wherein the battery manager 500 is also connected to the control terminal of the boost circuit 40 for controlling the boost circuit 40.

[0071] Figure 8 This is a structural diagram of a vehicle according to an embodiment of the present disclosure.

[0072] like Figure 8 As shown, the vehicle 1000 includes the vehicle charging system 200 of the above embodiment.

[0073] The vehicle charging control method, device, vehicle charging system, and vehicle disclosed herein can ensure the safety of passengers and meet normal charging needs when the contactor in the charging line corresponding to the charging port is sintered during multi-gun charging of the vehicle.

[0074] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0075] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0080] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0081] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A vehicle charging control method characterized by, The vehicle comprises M charging ports and N switch units, wherein the positive and negative poles of each charging port are connected with one switch unit respectively, M is an integer greater than 1; the method comprises: After at least one external charging device is connected with at least one charging port, the number of switch units that have sintering in N switch units is obtained; According to the number, the external charging device is controlled to charge or power off the charging port, or according to the number, the external charging device is controlled not to charge the charging port; The number of switch units that have sintering in N switch units is obtained, comprising: Obtaining sintering detection information of N switch units, and obtaining the number according to the sintering detection information; According to the number, the external charging device is controlled to charge or power off the charging port, comprising: When the number is zero, the external charging device is controlled to charge or power off the charging port connected with the external charging device; The vehicle comprises 2 charging ports and 4 switch units; According to the number, the external charging device is controlled not to charge the charging port, comprising: When the number is greater than or equal to 2, the external charging device is prohibited to charge any charging port; The external charging device is two, according to the number, the external charging device is controlled to charge or power off the charging port, or according to the number, the external charging device is controlled not to charge the charging port, comprising: When the number is equal to 1, the connection condition of two external charging devices and two charging ports is obtained; According to the connection condition, the external charging device is controlled to charge or power off the charging port connected with the external charging device, or according to the connection condition, the external charging device is controlled not to charge the charging port connected with the external charging device; The two external charging devices are respectively denoted as a first charging device and a second charging device, and the charging port where the switch unit that has sintering is determined as a target charging port according to the sintering detection information; According to the connection condition, the external charging device is controlled to charge or power off the charging port connected with the external charging device, comprising: When the target charging port is connected with the first charging device, and another charging port is connected with the second charging device, the first charging device is controlled to charge the target charging port first, and then the second charging device is controlled to charge the other charging port; When the target charging port is connected with the first charging device, and the other charging port is connected with the second charging device, the second charging device is controlled to power off the other charging port first, and then the first charging device is controlled to power off the target charging port.

2. The method of claim 1, wherein, According to the connection condition, the external charging device is controlled to charge or power off the charging port connected with the external charging device, comprising: When the target charging port is connected with the first charging device, and the other charging port is not connected with the second charging device, the first charging device is controlled to charge or power off the target charging port.

3. The method of claim 2, wherein, According to the connection condition, the external charging device is controlled not to charge the charging port connected with the external charging device, comprising: When the target charging port is not connected with the first charging device and the other charging port is connected with the second charging device, the second charging device is prohibited from charging the other charging port.

4. The method as claimed in claim 1, wherein, The method further comprises: Before the number of sintered switch units in the N switch units is acquired, the external charging device is prohibited from charging the M charging ports.

5. A vehicle charging control device characterized by comprising: A computer program product comprising a memory, a processor and a computer program stored on the memory, the computer program, when executed by the processor, implements the method of any one of claims 1-4.

6. A vehicle charging system, characterized by, The charging system comprises: a power battery; a positive main contactor and a negative main contactor, both of which are connected with the power battery; M charging ports, each of which is connected with the power battery through the positive main contactor and the negative main contactor, wherein M is an integer greater than 1; N switch units, the positive pole of each charging port is connected with the positive main contactor through one switch unit, and the negative pole of each charging port is connected with the negative main contactor through one switch unit; The device of claim 5 is connected with the charging port and the switch unit.

7. The system of claim 6, wherein, The system further comprises: a boost circuit corresponding to one or more charging ports, the boost circuit being connected between the power battery and the corresponding charging port; wherein the device is further connected with the boost circuit.

8. A vehicle characterized by comprising: A vehicle charging system as claimed in claim 6 or 7.

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