Vehicle power supply method and system, non-volatile storage medium, and vehicle

Abstract

The application discloses a vehicle power supply method and system, a nonvolatile storage medium and a vehicle. The method comprises the following steps: in response to receiving a control instruction that a vehicle enters a preset state, controlling a current converter in the vehicle to be in a working mode corresponding to the preset state, wherein the working mode is used for maintaining the voltage of the current converter at a voltage required by a target load in the vehicle in the preset state, and the current converter is directly connected with a power battery in the vehicle; and controlling the current converter in the working mode to supply power to the target load. The application solves the technical problem of vehicle power consumption waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of intelligent vehicles, in particular to a vehicle power supply method and system, a non-volatile storage medium and a vehicle. BACKGROUND

[0002] At present, a traditional electric vehicle is equipped with a high-voltage storage battery and a 12V low-voltage storage battery at the same time, the high-voltage storage battery and the low-voltage storage battery are divided to provide power for the vehicle, and the high-voltage storage battery not only supplies power for the vehicle, but also needs to charge the low-voltage storage battery when the power of the low-voltage storage battery is insufficient. The storage battery produces a certain power consumption waste in the standby state, and the two storage batteries supply power for the vehicle at the same time when the traditional electric vehicle is running, resulting in the problem of power consumption waste of the vehicle.

[0003] At present, no effective solution has been proposed for the above problems. SUMMARY

[0004] The embodiments of the present application provide a vehicle power supply method and system, a non-volatile storage medium and a vehicle to at least solve the technical problem of power consumption waste of the vehicle.

[0005] According to one aspect of the embodiments of the present application, a vehicle power supply method is provided, including: in response to receiving a control instruction that a vehicle enters a preset state, controlling a current converter in the vehicle to be in a working mode corresponding to the preset state, wherein the working mode is used to maintain a voltage of the current converter at a voltage required by a target load in the vehicle in the preset state, and the current converter is directly connected with a power battery in the vehicle; and controlling the current converter in the working mode to supply power for the target load.

[0006] Optionally, the preset state includes one of the following: a sleep state, an off state, a start state and a running state, and in response to receiving the control instruction that the vehicle enters the preset state, controlling the current converter in the vehicle to be in a power consumption mode corresponding to the preset state, including: in response to receiving the control instruction that the vehicle enters the sleep state or the off state, controlling the current converter in the vehicle to be in a low-power consumption mode; and in response to receiving the control instruction that the vehicle enters the start state or the running state, controlling the current converter in the vehicle to be in a normal power consumption mode, wherein power consumption of the current converter in the normal power consumption mode is greater than power consumption of the current converter in the low-power consumption mode.

[0007] Optionally, in a case where the vehicle enters the running state, the method further includes: controlling a relay in the vehicle to be in a target state, so that a motor in the vehicle is in a torque mode, wherein the relay is arranged between the power battery and an inverter of the motor; and using the motor in the torque mode to provide power for the vehicle.

[0008] Optionally, the target state comprises: a closed state, an open state, and the control of the relay in the vehicle to the target state so that the motor in the vehicle is in the torque mode comprises: determining the relay as a main positive relay, a main negative relay, and a pre-charge relay, wherein the main positive relay is arranged between a positive electrode of the power battery and the inverter, the main negative relay is arranged between a negative electrode of the power battery and the inverter, and the pre-charge relay is connected in parallel with the main positive relay; and the control of the main positive relay and the main negative relay to the closed state and the control of the pre-charge relay to the open state so that the motor is in the torque mode.

[0009] Optionally, the control of the main positive relay and the main negative relay to the closed state and the control of the pre-charge relay to the open state so that the motor is in the torque mode comprises: the control of the main negative relay to the closed state; the control of the pre-charge relay to the closed state in response to the main negative relay being in the closed state; the control of the main positive relay to the closed state in response to the pre-charge relay being in the closed state; and the control of the pre-charge relay to the open state in response to the main positive relay being in the closed state, so that the motor in the vehicle is in the torque mode.

[0010] Optionally, the control of the main positive relay to the closed state in response to the pre-charge relay being in the closed state comprises: the pre-charging of the motor capacitor connected in parallel on the inverter by the power battery in response to the pre-charge relay being in the closed state; and the control of the main positive relay to the closed state in response to receiving an end-of-charging instruction of the motor capacitor.

[0011] According to another aspect of the embodiments of the present application, a vehicle power supply system is also provided, comprising: a current converter connected with a power battery of a vehicle; a target load connected with the current converter; and a relay arranged between the power battery and an inverter of a motor in the vehicle.

[0012] Optionally, the relay comprises: a main positive relay arranged between a positive electrode of the power battery and the inverter; a main negative relay arranged between a negative electrode of the power battery and the inverter; and a pre-charge relay connected in parallel with the main positive relay.

[0013] According to another aspect of the embodiments of the present application, a non-volatile storage medium is also provided, comprising a stored program, wherein when the program is executed, the vehicle power supply method in the above embodiments is executed in a processor of a device where the program is located.

[0014] According to another aspect of the embodiments of the present application, a vehicle is also provided, comprising: one or more processors; and a storage device configured to store one or more programs; and when the one or more programs are executed by the one or more processors, the one or more processors execute the vehicle power supply method in the above embodiments.

[0015] In the embodiment of the present application, in response to receiving a control instruction that the vehicle enters a preset state, the current converter in the vehicle is controlled to be in an operating mode corresponding to the preset state; the current converter in the operating mode is controlled to supply power to the target load. It should be noted that the operating mode of the current converter is determined according to the preset state of the vehicle, and then the current converter supplies power to the target load according to the corresponding operating mode, so that the current converter can supply power according to different operating modes, avoid unnecessary power consumption, and achieve the purpose of reducing the power consumption of the vehicle, thereby realizing the technical effect of ensuring low-voltage power supply of the vehicle in different states by using the current converter, and solving the technical problem of waste of vehicle power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0017] Figure 1 is a flowchart of a vehicle power supply method according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of an optional communication relationship connection of controllers of an electric vehicle according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of an optional electric topology connection of an electric vehicle without a low-voltage storage battery according to an embodiment of the present application;

[0020] Figure 4 is a flowchart of an optional vehicle power supply method according to an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a vehicle power supply device according to an embodiment of the present application;

[0022] Figure 6 is a schematic diagram of a vehicle power supply system according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0024] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of the application, as well as the above-described drawings, are used to distinguish between similar objects and not necessarily describe a particular sequential or chronological order. It is to be understood that the use of data so designated is not meant to limit a given embodiment to a specific embodiment, unless otherwise explicitly defined by context. Furthermore, the terms "include", "comprise" and "have" and their conjugates, as used in the specification and in the claims, are intended to encompass the inclusion of singular items in a group of items that contain one or more items unless otherwise explicitly defined by context. Furthermore, the terms "comprise", "comprising", "include", "including", and "have", "having" and variants thereof as used herein are used in the sense of "including", i.e. meaning "including, but not limited to".

[0025] Embodiment 1

[0026] According to an embodiment of the application, an embodiment of a vehicle power supply method is provided. It is to be understood that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0027] Figure 1 is a flowchart of a vehicle power supply method according to an embodiment of the application, as shown in Figure 1 The method comprises the following steps:

[0028] In step S102, in response to receiving a control instruction for the vehicle to enter a preset state, the current converter in the vehicle is controlled to be in an operating mode corresponding to the preset state, wherein the operating mode is used to maintain the voltage of the current converter at a voltage required by a target load in the vehicle in the preset state, and the current converter is directly connected with a power battery in the vehicle.

[0029] The vehicle described above can be a pure electric vehicle, or an electric vehicle without a low-voltage storage battery.

[0030] The preset state can be a vehicle state set in advance according to needs, including but not limited to: sleep state, OFF state, start (CL15, soft start mode) state, driving (CL50, advanced cruise mode) state. Among them, the sleep state can be a power saving mode, when the car stops running and is not used for a long time, it will enter the sleep state. In the sleep state, all unnecessary systems will be turned off, and the engine will also stop working. This can help save energy and prolong battery life. The OFF state can be a vehicle shutdown state. The start state can be a state in which the vehicle engine has been started and is in operation, can drive the vehicle to travel, and various instruments and functions of the vehicle will start to work, such as lights, air conditioning, radio, etc. have started to work, usually used for slow movement or to alleviate the impact of braking when starting. The vehicle acceleration in this mode will be limited, so that passengers can ride more comfortably. The driving state can be the state of the vehicle when driving on the road, which can realize adaptive cruise function, and can automatically change lanes, follow the front vehicle, etc. operation according to traffic conditions. At the same time, it can also improve fuel utilization and reduce carbon emissions, including but not limited to: constant speed driving, deceleration driving, acceleration driving, braking, curve changing.

[0031] The control instruction can be an instruction for controlling the current state of the vehicle.

[0032] The current converter can be a device that converts one voltage or current signal into another different voltage or current signal, and can have a control power source, which can be a rechargeable lithium battery or a 12V power source generated by connecting a high-voltage breaker to a step-down control circuit.

[0033] The working mode can be the working mode of the current converter, including but not limited to: low-power mode, normal-power mode. Among them, the low-power mode can be a way for the current converter to run at low power. The normal-power mode can be a way for the current converter to run normally.

[0034] The target load can be the active power consumed by the current converter when the voltage is maintained at the preset state.

[0035] The power battery can be a rechargeable lithium-ion battery used to drive an electric vehicle, which has high energy density, long service life, fast charging and discharging, etc. Compared with the starting battery used by traditional cars, the power battery needs to bear greater load and more frequent charging and discharging cycles.

[0036] In an optional embodiment, when the vehicle enters the preset state corresponding to the control instruction, the vehicle sends a signal corresponding to the preset state to the current converter, and controls the working mode of the current converter in the vehicle to be converted to the working mode corresponding to the preset state of the vehicle.

[0037] In another optional embodiment, when the vehicle control system receives a control instruction for the vehicle to enter a sleep state or a shutdown state, the current converter in the vehicle is controlled to adjust the working mode to a low-power mode corresponding to the sleep state or the shutdown state of the vehicle, so as to reduce the power consumption of the vehicle and avoid unnecessary power waste. When the vehicle control system receives a control instruction for the vehicle to enter a start state or a running state, the current converter in the vehicle is controlled to adjust the working mode to a normal power mode corresponding to the start state or the running state of the vehicle, so as to ensure the normal operation of the vehicle.

[0038] It should be noted that, during the debugging stage of the vehicle, the current converter can be provided with a switch. In the IG-OFF mode (a mode in which only emergency lights, clocks and other constant power supplies are powered, and other power supplies are not powered), the power supply of the low-voltage load can be cut off by turning off the power supply of the current converter. After the normal delivery stage of the vehicle, the switch can be completely opened.

[0039] In step S104, the current converter in the working mode is controlled to supply power to the target load.

[0040] In an optional embodiment, the current working mode of the current converter is determined, and the current converter determines the target load according to the corresponding working mode and supplies power to the vehicle according to the target load. For example, when it is determined that the current working mode of the current converter is a low-power mode, the current converter works in the low-power mode to supply power to the target load and realize low-voltage power supply of the vehicle. When it is determined that the current working mode of the current converter is a normal power mode, the current converter works in the normal power mode to supply power to the target load.

[0041] Through the above steps, the current converter in the vehicle can be controlled to be in a working mode corresponding to a preset state of the vehicle in response to receiving a control instruction for the vehicle to enter the preset state, and the current converter in the working mode can be controlled to supply power to a target load. It should be noted that the working mode of the current converter is determined according to the preset state of the vehicle, and then the current converter supplies power to the target load according to the corresponding working mode, so that the current converter can supply power according to different working modes, avoid unnecessary power consumption, achieve the purpose of reducing the power consumption of the vehicle, and thus realize the technical effect of ensuring low-voltage power supply of the vehicle in different states by using the current converter, and solve the technical problem of power consumption waste of the vehicle.

[0042] It should be noted that the electric vehicle is generally equipped with a high-voltage battery and a 12V low-voltage battery, wherein the 12V low-voltage battery mainly supplies power to low-voltage accessories (various control units on the vehicle, low-voltage water pump, fan, etc.), and when the high-voltage system is powered on, a current converter is generally used for power supply, which supplies power to low-voltage accessories on one hand and charges the low-voltage battery when the power is insufficient on the other hand. For hybrid vehicles with traditional starters, the 12V battery serves as a power supplement (to buffer insufficient power supply capacity of the current converter, and the current converter does not have a capacitance characteristic) for the current demand of the starter. However, for pure electric vehicles without starters and other high-current demand components, the current converter can completely replace the low-voltage battery, except that the current converter needs to have a special low-power mode to supply power to the vehicle for low-power requirements when the vehicle is in sleep mode. A set of strategies are designed to adapt the current converter to operate in different power consumption modes according to different vehicle states, and then the current converter supplies power to the target load according to the working mode, achieving the purpose of reducing vehicle power consumption, ensuring normal use of vehicle functions, saving vehicle cost, and avoiding power waste.

[0043] Optionally, the preset state includes one of the following: a sleep state, an off state, a start state, and a running state, and in response to receiving a control instruction that the vehicle enters the preset state, the current converter in the vehicle is controlled to be in a power consumption mode corresponding to the preset state, including: in response to receiving a control instruction that the vehicle enters the sleep state or the off state, the current converter in the vehicle is controlled to be in a low-power consumption mode; and in response to receiving a control instruction that the vehicle enters the start state or the running state, the current converter in the vehicle is controlled to be in a normal power consumption mode, wherein the power consumption of the current converter in the normal power consumption mode is greater than the power consumption of the current converter in the low-power consumption mode.

[0044] In an optional embodiment, when the vehicle-mounted system receives a control instruction that the vehicle enters the sleep state or the off state, the vehicle-mounted system simultaneously forwards an instruction signal of the sleep state or the off state to the current converter, the current converter determines that the working mode corresponding to the signal of the sleep state or the off state is the low-power consumption mode, and thus adjusts the working mode of the current converter to the low-power consumption mode; and if the vehicle-mounted system receives a control instruction that the vehicle enters the start state or the running state, the vehicle-mounted system simultaneously forwards an instruction signal of the start state or the running state to the current converter, the current converter determines that the working mode corresponding to the start state or the running state is the normal power consumption mode, and thus adjusts the working mode of the current converter to the normal power consumption mode.

[0045] In another alternative embodiment, when the vehicle control system receives a control instruction for the vehicle to enter a preset state, the vehicle control system determines the working mode of the current converter corresponding to the current state of the vehicle, and sends a signal corresponding to the working mode of the current converter to the current converter, and the current converter supplies power to the target load according to the working mode corresponding to the signal. Among them, the sleep state or the off state corresponds to the low-power mode of the current converter, and the start state or the running state corresponds to the normal power mode of the current converter.

[0046] For example, when the vehicle control system receives a control instruction for the vehicle to enter a sleep state or an off state, the vehicle control system determines that the low-power mode of the current converter corresponding to the sleep state or the off state is the working mode of the current converter, and the vehicle control system sends a control instruction corresponding to the low-power mode to the current converter, and the current converter supplies power to the target load according to the low-power mode. When the vehicle control system receives a control instruction for the vehicle to enter a start state or a running state, the vehicle control system determines that the normal power mode of the current converter corresponding to the start state or the running state is the working mode of the current converter, and the vehicle control system sends a control instruction corresponding to the normal power mode to the current converter, and the current converter supplies power to the target load according to the normal power mode.

[0047] Optionally, in the case where the vehicle enters a running state, the method further comprises: controlling a relay in the vehicle to be in a target state, so that an electric motor in the vehicle is in a torque mode, wherein the relay is arranged between a power battery and an inverter of the electric motor; and using the electric motor in the torque mode to provide power for the vehicle.

[0048] The relay described above can be an electrical device capable of realizing switching control in a circuit. The target state can be the working state of the relay, including but not limited to: a closed state, an open state. Among them, the closed state can be that the internal contact of the relay is in the on state, that is, under the action of the control signal, the switch contact of the relay is closed. The open state can be that the internal contact of the relay is in the separated state, and the relay cannot transmit signals or control loads.

[0049] The electric motor described above can be a device that converts electrical energy into mechanical energy. The working state of the electric motor includes but is not limited to: a torque mode. Among them, the torque mode can be a mode in which the torque output is the main target when the motor is controlled to move, and the motor adjusts the output power according to the given torque value and speed, and realizes the required rotating force or movement effect.

[0050] The inverter described above can be a device that converts direct current into alternating current.

[0051] In an optional embodiment, when the vehicle enters the running state, the relay in the vehicle is controlled to be in the closed state, so that the vehicle control unit (VCU, Vehicle Control Unit) can control the motor in the vehicle to be in the torque mode, and when the motor control unit (MCU, Motor Control Unit) reports that the current working mode of the motor has successfully entered the torque mode, the vehicle control unit confirms that the high voltage power-on is completed, and the power system can start working to provide power for the vehicle running.

[0052] It should be noted that the vehicle includes a plurality of controllers, including: a vehicle control unit, a motor control unit, a battery management system (BMS, Battery Management System), an engine control unit (EMS, Engine Management System), and a transmission control unit (TCU, Transmission Control Unit). Among them, Figure 2 is a schematic diagram of an optional communication relationship connection of various controllers of an electric vehicle according to an embodiment of the application, as Figure 2 shown, the motor control unit sends signals to the vehicle control unit, and the signals sent include but are not limited to: motor mode, motor capacitor voltage, motor speed / torque, and motor fault state. The vehicle control unit sends control instructions to the motor control unit, including but not limited to: motor mode request, speed / torque request. The vehicle control unit sends control instructions to the battery management system of the power battery, including but not limited to: relay instructions. The battery management system feeds back the battery signal to the vehicle control unit, including but not limited to: relay state, battery voltage, current, system on chip (SOC, System on Chip), and state of health (SOH, State of Health). The vehicle control unit sends control instructions to the current converter, including but not limited to: current converter working mode request and output voltage / current request. The current controller reports information of the current controller to the vehicle control unit, including but not limited to: output voltage, output current, and working mode.

[0053] Optionally, the target state includes: a closed state and an open state, the relay in the vehicle is controlled to be in the target state, so that the motor in the vehicle is in the torque mode, including: determining that the relay is a main positive relay, a main negative relay, and a pre-charging relay, wherein the main positive relay is arranged between the positive electrode of the power battery and the inverter, the main negative relay is arranged between the negative electrode of the power battery and the inverter, and the pre-charging relay is connected in parallel with the main positive relay; the main positive relay and the main negative relay are controlled to be in the closed state, and the pre-charging relay is controlled to be in the open state, so that the motor is in the torque mode.

[0054] The above-mentioned main positive relay can be a switching device capable of switching at high voltage and high current, and can open or close the connection between the positive electrode and the negative electrode, thereby controlling the operation of the DC motor.

[0055] The above-mentioned main negative relay can be a device capable of cutting off the connection between the ground wire and the negative electrode, and is generally safer and more reliable when an emergency stop device is required.

[0056] The above-mentioned pre-charging relay can be a protective relay, which, when starting a large DC motor, generates a transient overcurrent phenomenon (i.e., an impact) at its input end, and without appropriate protection measures, the device can be damaged or the service life can be reduced. The pre-charging relay provides a smaller power output to the motor before starting, and provides full power after the system stabilizes.

[0057] The main positive relay, the main negative relay, and the pre-charging relay are generally used to control high-power DC motors or other large load devices.

[0058] In an alternative embodiment, the relays are the main positive relay, the main negative relay, and the pre-charging relay. If the vehicle is in a driving state, the corresponding relays in the vehicle are controlled to be in a closed state, so that the motor is in a torque mode. The main positive relay and the main negative relay are in a closed state, and the pre-charging relay is in an open state, so that the motor is in a torque mode.

[0059] It should be noted that, Figure 3 is a schematic diagram of an alternative electric topology connection of an electric vehicle without a low-voltage storage battery according to an embodiment of the present application, as Figure 3 shown, the diagram includes a power battery, a current converter, a low-voltage load, an inverter, a pre-charging relay, a main positive relay, a main negative relay, a pre-charging resistor, and a motor capacitor. The power battery is directly connected to the current converter, the current converter is connected to the low-voltage load, the power battery is connected to the inverter of the motor through various relays, the inverter is pre-charged, the main negative relay is connected to the negative electrode of the power battery and is arranged between the negative electrode of the power battery and the inverter, the main positive relay is connected to the positive electrode of the power battery and is arranged between the positive electrode of the power battery and the inverter, the pre-charging relay is connected in parallel with the main positive relay, and the pre-charging relay is connected in series with the pre-charging resistor. If you want the motor to be in a torque mode, you only need to close the main positive relay and the main negative relay, and disconnect the pre-charging relay, so that the motor is in a torque mode, and the vehicle is powered.

[0060] Optionally, the control of the main positive relay and the main negative relay in the closed state, and the control of the pre-charge relay in the open state, so that the motor is in the torque mode, comprising: controlling the main negative relay in the closed state; in response to the main negative relay in the closed state, controlling the pre-charge relay in the closed state; in response to the pre-charge relay in the closed state, controlling the main positive relay in the closed state; in response to the main positive relay in the closed state, controlling the pre-charge relay in the open state, so that the motor in the vehicle is in the torque mode.

[0061] In an optional embodiment, if the main positive relay and the main negative relay are in the closed state, and the pre-charge relay is in the open state. The vehicle controller controls the relay closure in the battery management system needs a certain switching sequence to ensure the safety of the battery management system. First, the main negative relay needs to be in the closed state; after the main negative relay is successfully in the closed state, the pre-charge relay is further controlled to be in the closed state, and after the pre-charge relay is successfully in the closed state, the main positive pre-charge relay is further controlled to be in the closed state, and after the main positive relay is successfully closed, the pre-charge relay is controlled to be in the open state,

[0062] Optionally, in response to the pre-charge relay in the closed state, the control of the main positive relay in the closed state, comprising: in response to the pre-charge relay in the closed state, the power battery is used to pre-charge the motor capacitor parallelly connected on the inverter; in response to receiving the charging end instruction of the motor capacitor, the main positive relay is controlled to be in the closed state.

[0063] The motor capacitor mentioned above can be a capacitor in an alternating current motor, used to improve the starting and running efficiency. It is usually composed of two metal plates and an insulating medium, which can store electrical energy and release it when needed to help drive the motor. During the starting process, it can reduce the starting time and energy consumption by providing additional torque to the rotor, and during the running process, it can stabilize the output power and reduce the oscillation phenomenon caused by fluctuations.

[0064] In an optional embodiment, after the pre-charge relay is in the closed state, the main positive relay is controlled to be in the closed state. After the pre-charge relay is in the closed state, the power battery is used to pre-charge the motor capacitor parallelly connected on the inverter. If the motor capacitor charging is successful, the corresponding charging end instruction will be sent to the vehicle controller, and the vehicle controller will control the pre-charge relay to be disconnected after receiving the charging end instruction.

[0065] Figure 4 is a flow chart of an optional vehicle power supply method according to an embodiment of the application, as shown in Figure 4 the method steps are as follows:

[0066] Step S401, determine whether the current vehicle state is sleep state or off state. If yes, execute step S402; if no, execute step S404.

[0067] Step S402, in response to the current vehicle state being sleep state or off state, control the current converter to work in low power consumption mode.

[0068] Step S403, control the connection of the relay, so that the current converter supplies low voltage to the target load.

[0069] Step S404, in response to the current vehicle state being start state or criminal state, control the current converter to work in normal power consumption mode.

[0070] Step S405, control the connection mode of the relay, so that the motor is in torque mode.

[0071] Embodiment 2

[0072] According to another aspect of the embodiments of the present application, a vehicle power supply system is also provided, which can execute the vehicle power supply method of the above-mentioned embodiments, and the specific implementation method and preferred application scenario are the same as those of the above-mentioned embodiments, which will not be repeated here.

[0073] Figure 5 is a schematic diagram of a vehicle power supply system according to an embodiment of the present application. As shown in Figure 5 , the system 50 can include: a current converter 51, a target load 52, a relay 53.

[0074] The current converter 51 is connected with the power battery of the vehicle.

[0075] The target load 52 is connected with the current converter.

[0076] The relay 53 is arranged between the power battery and the inverter of the motor in the vehicle.

[0077] Optionally, the relay 53 includes: a main positive relay 531 arranged between the positive electrode of the power battery and the inverter; a main negative relay 532 arranged between the negative electrode of the power battery and the inverter; and a pre-charge relay 533 connected in parallel with the main positive relay.

[0078] Embodiment 3

[0079] According to another aspect of the embodiments of the present application, a vehicle power supply device is also provided, which can execute the vehicle power supply method of the above-mentioned embodiments, and the specific implementation method and preferred application scenario are the same as those of the above-mentioned embodiments, which will not be repeated here.

[0080] Figure 6 is a schematic diagram of a vehicle power supply device according to an embodiment of the present application, as shown inFigure 6 As shown, the device comprises the following parts: a first control module 60, a second control module 62.

[0081] The first control module 60 is configured to control the current converter in the vehicle to be in a working mode corresponding to the preset state in response to receiving a control instruction for the vehicle to enter the preset state, wherein the working mode is used to maintain the voltage of the current converter at a voltage required by a target load in the vehicle in the preset state, and the current converter is directly connected to a power battery in the vehicle.

[0082] The second control module 62 is configured to control the current converter in the working mode to supply power to the target load.

[0083] Optionally, the first control module comprises: a first control unit configured to control the current converter in the vehicle to be in a low-power-consumption mode in response to receiving a control instruction for the vehicle to enter a sleep state or an off state; and a second control unit configured to control the current converter in the vehicle to be in a normal-power-consumption mode in response to receiving a control instruction for the vehicle to enter a start state or a running state, wherein the power consumption of the current converter in the normal-power-consumption mode is greater than the power consumption of the current converter in the low-power-consumption mode.

[0084] Optionally, the first control module further comprises: a third control unit configured to control a relay in the vehicle to be in a target state so that a motor in the vehicle is in a torque mode, wherein the relay is arranged between the power battery and an inverter of the motor; and a power supply unit configured to provide power for the vehicle by using the motor in the torque mode.

[0085] Optionally, the third control unit comprises: a first determination subunit configured to determine that the relay is a main positive relay, a main negative relay, and a pre-charge relay, wherein the main positive relay is arranged between a positive electrode of the power battery and the inverter, the main negative relay is arranged between a negative electrode of the power battery and the inverter, and the pre-charge relay is connected in parallel with the main positive relay; and a first control subunit configured to control the main positive relay and the main negative relay to be in a closed state, and control the pre-charge relay to be in an open state, so that the motor is in the torque mode.

[0086] Optionally, the first control subunit comprises: controlling the main negative relay to be in the closed state; in response to the main negative relay being in the closed state, controlling the pre-charge relay to be in the closed state; in response to the pre-charge relay being in the closed state, controlling the main positive relay to be in the closed state; and in response to the main positive relay being in the closed state, controlling the pre-charge relay to be in the open state, so that the motor in the vehicle is in the torque mode.

[0087] Optionally, the first control subunit further comprises: pre-charging the motor capacitor connected in parallel with the inverter by using the power battery in response to the pre-charging relay being in the closed state; and controlling the main positive relay to be in the closed state in response to receiving a charging end instruction of the motor capacitor.

[0088] Embodiment 4

[0089] According to another aspect of the embodiments of the present application, a non-transitory storage medium is also provided, which includes a stored program, wherein the program, when executed by a processor of a device, controls the processor to perform the vehicle power supply method in the above embodiments.

[0090] Embodiment 5

[0091] According to another aspect of the embodiments of the present application, a vehicle is also provided, which includes: one or more processors; a storage device configured to store one or more programs; and when the one or more programs are executed by the one or more processors, the one or more processors perform the vehicle power supply method in the above embodiments.

[0092] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0093] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0094] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units can be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units can be indirect coupling or communication connection through some interfaces, units or modules, which can be electrical or other forms.

[0095] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple units. According to actual needs, some or all of the units can be selected to achieve the purpose of the present embodiment scheme.

[0096] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0097] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various program code storage media.

[0098] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method of supplying power to a vehicle, characterized by, The method comprises: in response to receiving a control instruction for the vehicle to enter a preset state, controlling a current converter in the vehicle to be in an operating mode corresponding to the preset state, wherein the operating mode is used to maintain the voltage of the current converter at a voltage required by a target load in the vehicle in the preset state, and the current converter is directly connected with a power battery in the vehicle; controlling the current converter in the operating mode to supply power to the target load; wherein the preset state comprises one of the following: a sleep state, an off state, a start state, and a running state, and in response to receiving a control instruction for the vehicle to enter a preset state, controlling a current converter in the vehicle to be in a power consumption mode corresponding to the preset state, comprising: in response to receiving a control instruction for the vehicle to enter the sleep state or the off state, controlling the current converter in the vehicle to be in a low-power consumption mode; in response to receiving a control instruction for the vehicle to enter the start state or the running state, controlling the current converter in the vehicle to be in a normal power consumption mode, wherein the power consumption of the current converter in the normal power consumption mode is greater than the power consumption of the current converter in the low-power consumption mode; wherein, in the case that the vehicle enters the running state, the method further comprises: controlling a relay in the vehicle to be in a target state to make a motor in the vehicle be in a torque mode, wherein the relay is arranged between the power battery and an inverter of the motor; using the motor in the torque mode to provide power for the vehicle; the target state comprises: a closed state and an open state, and controlling a relay in the vehicle to be in a target state to make a motor in the vehicle be in a torque mode, comprising: determining that the relay is a main positive relay, a main negative relay, and a pre-charge relay, wherein the main positive relay is arranged between a positive electrode of the power battery and the inverter, the main negative relay is arranged between a negative electrode of the power battery and the inverter, and the pre-charge relay is connected in parallel with the main positive relay; controlling the main positive relay and the main negative relay to be in the closed state, and controlling the pre-charge relay to be in the open state, to make the motor be in the torque mode.

2. The vehicle power supply method according to claim 1, characterized by, controlling the main positive relay and the main negative relay to be in the closed state, and controlling the pre-charge relay to be in the open state, to make the motor be in the torque mode, comprising: controlling the main negative relay to be in the closed state; in response to the main negative relay being in the closed state, controlling the pre-charge relay to be in the closed state; in response to the pre-charge relay being in the closed state, controlling the main positive relay to be in the closed state; in response to the main positive relay being in the closed state, controlling the pre-charge relay to be in the open state to make the motor in the vehicle be in the torque mode.

3. The method of claim 2, wherein in response to the pre-charge relay being in the closed state, controlling the main positive relay to be in the closed state, comprising: In response to the pre-charge relay being in the closed state, pre-charge the motor capacitor in parallel with the inverter using the power battery; In response to receiving the end-of-charge instruction of the motor capacitor, control the main positive relay to be in the closed state.

4. A power supply system for a vehicle, characterized by comprising: The vehicle power supply method of any one of claims 1-3, comprising: a current converter connected to a power battery of the vehicle; a target load connected to the current converter; a relay disposed between the power battery and an inverter of a motor in the vehicle.

5. The vehicle power supply system of claim 4, wherein The relay comprises: a main positive relay disposed between a positive electrode of the power battery and the inverter; a main negative relay disposed between a negative electrode of the power battery and the inverter; a pre-charge relay connected in parallel with the main positive relay.

6. A non-volatile storage medium, comprising: The non-volatile storage medium comprises a stored program, wherein when the program is running, the processor of the device is controlled to execute the vehicle power supply method of any one of claims 1-3.

7. A vehicle characterized by comprising: comprising: one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors execute the vehicle power supply method of any one of claims 1-3.

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