Power control system, control method thereof and vehicle

Abstract

The invention provides a power control system, a control method of the power control system and a vehicle, the power control system comprises a vehicle control module and a disconnection control module, the disconnection control module is connected with the vehicle control module and a power disconnection device, the disconnection control module receives a combination instruction or a disconnection instruction from the vehicle control module, and the combination instruction or the disconnection instruction is sent to the vehicle control module. The power disconnecting device is controlled to be combined with or separated from the front axle; when the vehicle is powered off, the disconnection control module controls the power disconnection device to be separated from the front axle. The power control system can enable the power disconnection device to be in a disconnection mode before the vehicle is powered off, so that the problem that the first motor module is overheated and burnt down due to state conflict between the disconnection control module and the whole vehicle control module after the vehicle is powered on is avoided, the service life of the front axle and the first motor module is prolonged, and the service life of the vehicle is prolonged. The use reliability of the front axle and the first motor module is guaranteed, and meanwhile certain safety is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and more specifically, to a power control system, a control method of a power control system, and a vehicle. Background Art

[0002] At present, pure electric four-wheel drive vehicles are usually equipped with a front axle and a rear axle, and an independent front axle motor controller (Motor Control Unit, MCU) and a rear axle motor controller are used to drive the two. Among them, the front axle and the front axle motor controller are usually used as the auxiliary drive structure of the vehicle to meet the different driving requirements of the vehicle.

[0003] In the related art, an Actuator Control Unit for Electrical Axle Actuator (ACU) is usually used to selectively disconnect the power transmission between the front axle motor controller and the front axle to control the front axle to perform auxiliary drive or stop auxiliary drive. However, after the vehicle is powered on, there may be a problem that the front axle motor controller and the front axle are not disconnected due to a fault in the disconnection mechanism control unit. At this time, the rear axle motor controller and the rear axle will drag the front axle motor controller and the front axle, causing the front axle motor controller to overheat and burn, reducing the service life of the front axle motor controller and posing certain safety hazards. Summary of the invention

[0004] The present application provides a power control system, a control method for a power control system and a vehicle, aiming to solve the problem that a failure of a disconnect mechanism control unit results in failure to disconnect the front axle motor controller and the front axle, which in turn causes the front axle motor controller to overheat and burn, posing certain safety hazards.

[0005] In a first aspect, a power control system is provided, which is applied to a vehicle, the vehicle comprising a front axle and a power disconnect device; the power control system comprises a vehicle control module and a disconnect control module, the disconnect control module is connected to the vehicle control module and the power disconnect device, the disconnect control module receives an engagement instruction or a disconnect instruction from the vehicle control module, and controls the power disconnect device to engage or disengage with the front axle according to the engagement instruction or the disconnect instruction; when the vehicle is powered off, the disconnect control module controls the power disconnect device to disengage from the front axle.

[0006] In the above technical solution, when the vehicle is powered off, the disconnection control module will control the power disconnection device to be disengaged from the front axle, so that the power disconnection device before the vehicle is powered off is in the disconnection mode. At this time, if the vehicle is powered on again and the vehicle control module does not send a connection instruction to the disconnection control module, the disconnection control module will maintain the mode before the last power-off (i.e., disconnection mode) to avoid the situation that after the vehicle is powered on, the vehicle control module does not send a connection instruction to the disconnection control module, and the disconnection control module maintains the disconnection mode before power-off, resulting in a state conflict between the disconnection control module and the vehicle control module, causing the second motor module and the rear axle to drag the first motor module and the front axle to run, resulting in the problem of overheating and burning of the first motor module, thereby increasing the service life of the front axle and the first motor module to ensure the reliability of the use of the front axle and the first motor module. At the same time, a certain degree of safety is improved.

[0007] In combination with the first aspect, in some possible implementations, the vehicle also includes a power battery; the disconnection control module is connected to the power battery, and the disconnection control module is also used to obtain the working status of the power battery. When the working status indicates that the power battery is not working, the disconnection control module controls the power disconnection device to disengage from the front axle.

[0008] In combination with the first aspect, in some possible implementations, the disconnection control module includes a control unit and a detection unit, the detection unit is connected to the control unit and the power battery, the detection unit is used to detect the working status of the power battery and send it to the control unit, when the working status indicates that the power battery is not working, the control unit controls the power disconnection device to disengage from the front axle.

[0009] In the above technical solution, by setting up a detection unit, the working status of the power battery can be detected in real time to improve the detection accuracy, thereby improving the reliability of the control unit controlling the power disconnect device to disengage from the front axle.

[0010] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the power control system also includes a first motor module, which is connected to the front axle and the vehicle control module. When the vehicle control module sends a connection instruction to the disconnection control module, the vehicle control module is also used to send a control signal to the first motor module, and the first motor module drives the front axle to output power according to the control signal.

[0011] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the power control system also includes a temperature sensor, which is connected to the first motor module and the disconnection control module. The temperature sensor is used to detect the temperature of the first motor module. When the temperature sensor detects that the temperature of the first motor module is greater than or equal to the first temperature threshold, it sends a first fault instruction to the disconnection control module. The disconnection control module is also used to control the power disconnection device to disengage from the front axle according to the first fault instruction.

[0012] In the above technical solution, the temperature of the first motor module in the auxiliary drive mode is detected in real time by a temperature sensor, and when it is detected that the temperature of the first motor module is greater than or equal to the first temperature threshold, a first fault instruction is sent to the disconnection control module, so that the disconnection control module controls the power disconnection device to disengage from the front axle based on the first fault instruction, so that the first motor module and the front axle stop outputting power, thereby avoiding the problem that the first motor module continues to work and is overheated and burned due to overheating due to a long working time or other factors. The working reliability of the first motor module is improved, and the service life of the first motor module is increased, thereby ensuring the operating reliability of the power control system and the vehicle.

[0013] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the vehicle also includes a rear axle, and the power control system also includes a second motor module, and the second motor module is connected to the rear axle and the vehicle control module; wherein the vehicle control module is also connected to the temperature sensor, and the vehicle control module is used to receive a first fault instruction, and based on the first fault instruction, adjust the output torque of the first motor module and the second motor module to zero, so that the front axle and the rear axle stop outputting power.

[0014] In the above technical solution, the temperature sensor will also send the first fault instruction to the vehicle control module. After receiving the first fault instruction, the vehicle control module will detect the current mode of the disconnect control module. When the vehicle control module detects that the disconnect control module is in the engagement mode at this time, it is known that the disconnect control module has a fault and cannot enter the disconnect mode. The vehicle control module will adjust the output torque of the first motor module and the second motor module to zero to stop the front axle and the rear axle from outputting power, thereby limiting the power of the whole vehicle and stopping the vehicle, thereby avoiding the disconnect control module from failing to enter the disconnect mode, resulting in the power disconnect device being unable to disengage from the front axle in time, resulting in the first motor module still having the problem of overheating and burning, so as to further improve the working reliability and service life of the first motor module, thereby ensuring the operation reliability of the power control system and the vehicle.

[0015] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, when the temperature sensor detects that the temperature of the first motor module is equal to or less than the second temperature threshold, it sends a second fault instruction to the vehicle control module, and the vehicle control module is also used to adjust the output torque of the second motor module to the target torque according to the second fault instruction, and the target torque is greater than zero; wherein the second temperature threshold is less than the first temperature threshold.

[0016] In the above technical solution, the temperature sensor will send a second fault instruction to the vehicle control module, and the vehicle control module is also used to adjust the output torque of the second motor module to the target torque according to the second fault instruction. At this time, the target torque is greater than zero, that is, the vehicle control module will cancel part of the power restriction, so that the vehicle can be in a driving state. In this way, the problem of the first motor module being overheated and burned is avoided, and the service life of the first motor module is ensured, while the vehicle can be in a driving state, so as to avoid the vehicle being in a stopped state affecting the user experience, so as to improve a certain user experience.

[0017] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the vehicle also includes a display device, and the power control system also includes a prompt module, the prompt module is connected to the temperature sensor and the display device, the prompt module is used to receive a first fault instruction and a second fault instruction from the temperature sensor, when the prompt module receives the first fault instruction, the display device is controlled to display the fault; when the prompt module receives the second fault instruction, the display device is controlled to stop displaying the fault.

[0018] In the above technical solution, the vehicle fault information can be fed back to the user in real time through the prompt module and the display device, so that the user can know the vehicle fault problem in real time to further improve the user experience.

[0019] In a second aspect, an embodiment of the present application provides a control method of a power control system, which is applied to the power control system described in any optional manner of the first aspect, wherein the power control system includes a vehicle control module and a disconnection control module; the control method includes:

[0020] Get a join instruction or a break instruction;

[0021] Controlling the power disconnect device to engage or disengage with the front axle according to an engagement command or a disconnection command;

[0022] When the vehicle is powered off, the power disconnect device is controlled to disengage from the front axle.

[0023] In combination with the second aspect and the above implementations, in some possible implementations, the power control system further includes a temperature sensor, and the control method further includes:

[0024] Obtaining a first fault instruction;

[0025] The power disconnect device is controlled to be disengaged from the front axle according to the first fault instruction.

[0026] In a third aspect, an embodiment of the present application provides a vehicle, comprising a front axle, a rear axle, a power disconnect device, a power battery and a power control system as described in any optional manner in the first aspect, wherein the power control system is electrically connected to the front axle, the rear axle, the power disconnect device and the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a module structure of a power control system provided in an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the module structure of another power control system provided in an embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of the module structure of another power control system provided in an embodiment of the present application;

[0030] Figure 4 is a structural schematic diagram of a first motor module and a power disconnect device provided in an embodiment of the present application;

[0031] Figure 5 is a structural schematic diagram of another first motor module and a power disconnect device provided in an embodiment of the present application;

[0032] Figure 6 It is a schematic diagram of the module structure of another power control system provided in an embodiment of the present application;

[0033] Figure 7 It is a schematic diagram of the module structure of another power control system provided in an embodiment of the present application;

[0034] Figure 8 It is a schematic diagram of the module structure of another power control system provided in an embodiment of the present application;

[0035] Fig. 9 It is a schematic diagram of the module structure of another power control system provided in an embodiment of the present application;

[0036] Fig.10 It is a schematic diagram of the process structure of a power control system provided in an embodiment of the present application;

[0037] Fig.11 It is a schematic diagram of the process structure of another power control system provided in an embodiment of the present application;

[0038] Fig.12 It is a flow structure diagram of another power control system provided in an embodiment of the present application.

[0039] Among them, the reference numerals in the figure are:

[0040] 1. Front axle; 2. Rear axle; 3. Power control system; 31. Vehicle control module; 32. First motor module; 32A. Output shaft; 32B. Intermediate shaft; 32C. Output shaft; 321. Drive motor; 322. Synchronizer; 323. Differential; 33. Second motor module; 34. Disconnect control module; 341. Control unit; 342. Detection unit; 35. Temperature sensor; 36. Prompt module; 4. Power disconnect device; 41. Shift motor; 42. Shift fork; 5. Power battery; 6. Display device. DETAILED DESCRIPTION

[0041] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0042] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0043] At present, pure electric four-wheel drive vehicles are usually provided with a front axle (Front Axle) and a rear axle (Rear Axle), the front axle is connected to the two wheels (i.e., the front wheels) at the front end of the vehicle, and the rear axle is connected to the two wheels at the rear end of the vehicle, respectively, to realize the driving of the wheels. In order to realize the precise control of the torque output of the front and rear wheels, the vehicle is usually provided with a front axle motor controller and a rear axle motor controller to drive the front wheels corresponding to the front axle and the rear wheels corresponding to the rear axle respectively. Among them, the front axle and the front axle motor controller are usually used as auxiliary drive structures of the vehicle to meet the different driving requirements of the vehicle. For example, when the vehicle is sliding or braking, the vehicle can be in energy-saving mode. At this time, the power transmission between the front axle motor controller and the front axle is disconnected to reduce energy consumption and achieve energy-saving effects. For another example, when the vehicle is in a special road condition (such as a steep slope), the vehicle needs a large power. At this time, the power transmission between the front axle motor controller and the front axle is connected, thereby increasing the power of the vehicle.

[0044] In order to selectively disconnect the power transmission between the front axle motor controller and the front axle, a disconnection mechanism control unit is usually provided in the vehicle of the related art, and a connection instruction or a disconnection instruction is sent to the disconnection mechanism control unit through the vehicle control unit (VCU), so that the disconnection mechanism control unit can flexibly control the on and off of the power transmission between the front axle motor controller and the front axle, so as to minimize the energy loss generated by the front axle motor controller under high-speed rotation, thereby improving the economy of the whole vehicle. However, the addition of the disconnection mechanism control unit to the pure electric four-wheel drive vehicle increases the matching complexity of the vehicle power system. If the disconnection mechanism control unit fails, the front axle motor controller and the front axle may continue to run at high speed, and the rear axle motor controller and the rear axle may drag the front axle motor controller and the front axle, causing the front axle motor controller and the front axle to overheat and burn, reducing the service life of the front axle motor controller and the front axle, and there are certain safety hazards.

[0045] For example, after the vehicle is powered on, in order to achieve a large power output, the vehicle controller will send a connection instruction to the disconnection mechanism control unit, and the disconnection mechanism control unit will connect the power transmission between the front axle motor controller and the front axle based on the connection instruction, that is, the disconnection mechanism control unit is in the connection mode at this time. After the vehicle is powered off, the disconnection mechanism control unit will automatically disconnect due to power off. If the vehicle is powered on again and the vehicle controller does not send a connection instruction to the disconnection mechanism control unit, the disconnection mechanism control unit will maintain the mode before the last power off. For example, the disconnection mechanism control unit is in the connection mode before the vehicle is powered off, then the disconnection mechanism control unit will maintain the connection mode at this time, so that the power transmission between the front axle motor controller and the front axle is connected. However, at this time, the vehicle controller does not send a connection instruction to the disconnection mechanism control unit, that is, the vehicle controller does not control the front axle motor controller to enter the torque mode. If the disconnection mechanism control unit maintains the connection mode before power off at this time, it will cause the disconnection mechanism control unit and the vehicle controller to have a state conflict problem, and there is a situation that the front axle motor controller does not enter the torque mode, and the rear axle motor controller and the rear axle drag the front axle motor controller and the front axle to run, causing the front axle motor controller to overheat and burn, reducing the service life of the front axle motor controller, and there are certain safety hazards.

[0046] To this end, an embodiment of the present application provides a power control system, a control method for a power control system, and a vehicle. The power control system can put the power disconnect device in a disconnect mode before the vehicle is powered off, so as to avoid a state conflict between the disconnection control module and the vehicle control module after the vehicle is powered on, causing the second motor module and the rear axle to drag the first motor module and the front axle to run, resulting in overheating and burning of the first motor module. The service life of the front axle and the first motor module is increased to ensure the reliability of the use of the front axle and the first motor module, while improving a certain degree of safety.

[0047] The power control system, the control method of the power control system and the vehicle provided in the embodiments of the present application are exemplarily introduced below with reference to the accompanying drawings.

[0048] The present application embodiment provides a vehicle, such as Figure 1 As shown, the vehicle includes a front axle 1, a rear axle 2 and a power control system 3. The front axle 1 is connected to the front wheels of the vehicle, the rear axle 2 is connected to the rear wheels of the vehicle, and the power control system 3 is connected to the front axle 1 and the rear axle 2. The power control system 3 can control the front axle 1 and the rear axle 2 to drive the front wheels and the rear wheels accordingly to achieve functions such as acceleration, deceleration, and braking.

[0049] When the vehicle provided in the present application is a pure electric four-wheel drive vehicle, in order to achieve precise control of the torque output of the front and rear wheels, in one example, Figure 2 As shown, the power control system 3 provided in the present application includes a vehicle control module 31, a first motor module 32 and a second motor module 33. The vehicle control module 31 is connected to the first motor module 32 and the second motor module 33. The first motor module 32 is connected to the front axle, and the second motor module 33 is connected to the rear axle.

[0050] In this example, the vehicle control module 31 determines the corresponding control signal based on the operator's operating instructions (such as accelerator pedal position, brake signal, steering angle, etc.) and the real-time data of various sensors in the vehicle (such as vehicle speed, acceleration, vehicle status, etc.), and sends the control signal to the first motor module 32 and the second motor module 33 through the vehicle network. Here, it is worth noting that the control signal at least includes target torque, target speed and braking requirements. After receiving the instructions from the vehicle control module 31, the first motor module 32 and the second motor module 33 adjust the current size accordingly to match the output torque of the first motor module 32 and the second motor module 33 with the target torque, and control the output power of the front axle 1 and the rear axle accordingly. In this way, the output power of the front axle 1 and the rear axle 2 is controlled by the first motor module 32 and the second motor module 33, respectively, to achieve precise control of the torque output of the front and rear wheels.

[0051] In one example, the front axle 1 and the first motor module 32 provided in the present application can be used as an auxiliary drive structure to meet different driving requirements of the vehicle. For example, when the vehicle is coasting or braking, the power transmission between the front axle 1 and the first motor module 32 is disconnected to reduce energy consumption and achieve energy saving. For another example, when the vehicle is in a special road condition such as a steep slope, the vehicle needs greater power. At this time, the power transmission between the front axle 1 and the first motor module 32 is connected, thereby increasing the power of the vehicle. In order to realize the on and off of the power transmission between the front axle 1 and the first motor module 32, in one example, as Figure 3As shown, the vehicle also includes a power disconnect device 4, which is located between the first motor module 32 and the front axle 1. The power control system 3 also includes a disconnect control module 34, which is connected to the vehicle control module 31. The disconnect control module 34 receives a connection instruction or a disconnect instruction from the vehicle control module 31, and controls the power disconnect device 4 to connect or disconnect with the front axle 1 according to the connection instruction or the disconnect instruction.

[0052] For example, if you want to reduce energy consumption to achieve energy saving, the vehicle control module 31 will send a shutdown command to the disconnection control module 34, and the disconnection control module 34 controls the power disconnection device 4 to disconnect from the front axle 1 based on the shutdown command, that is, the power transmission between the front axle 1 and the first motor module 32 is disconnected, the front axle 1 has no power output, and only the rear axle 2 has power output to achieve energy saving. If you want to increase the power output of the vehicle so that the vehicle can achieve stable driving in special scenarios, the vehicle control module 31 will send a connection command to the disconnection control module 34, and the disconnection control module 34 controls the power disconnection device 4 to connect with the front axle 1 based on the connection command, that is, the power transmission between the front axle 1 and the first motor module 32 is connected. At the same time, the vehicle control module 31 will also send a control signal to the first motor module 32, so that the first motor module 32 is in torque mode, that is, the first motor module 32 can drive the front axle 1 to output power according to the control signal. The control signal here at least includes the above-mentioned target torque, target speed and braking requirements, etc. At this time, both the front axle 1 and the rear axle 2 have power output to increase the power output of the vehicle, thereby improving the driving stability of the vehicle in special scenarios.

[0053] In one example, if Figure 4 As shown, the first motor module 32 may include a drive motor 321, a synchronizer 322, a differential 323, an input shaft 32A, an intermediate shaft 32B and an output shaft 32C. The drive motor 321, the input shaft 32A, the intermediate shaft 32B, the synchronizer 322, the differential 323 and the output shaft 32C are connected in sequence, the drive motor 321 is connected to the vehicle control module 31, the power disconnect device 4 is arranged on the intermediate shaft 32B, and the output shaft 32C is connected to the front axle 1. The synchronizer 322 matches the rotation speed of the input shaft 32A and the gear to be meshed through friction, thereby avoiding the impact and tooth-beating phenomenon between the gears, and the differential 323 is used to control the left and right wheels in the vehicle to rotate at different speeds when the vehicle turns, so as to achieve precise control of the rotation speed of each wheel, ensure that each wheel can rotate independently according to the ground conditions, and improve the vehicle's handling stability and driving safety.

[0054] In this example, when the auxiliary drive of the front axle 1 is not needed, the vehicle control module 31 controls the drive motor 321 to enter the preparation mode, at which time the output torque of the drive motor 321 is zero, and the vehicle control module 31 sends a shutdown command to the disconnection control module 34 to put the disconnection control module 34 in the disconnection (Disengage) mode, thereby controlling the power disconnection device 4 to disengage from the synchronizer 322, that is, at this time the power transmission between the front axle 1 and the drive motor 321 is disconnected, and the front axle 1 has no power output. When the auxiliary drive of the front axle 1 is needed, the vehicle control module 31 controls the drive motor 321 to enter the torque mode, at which time the output torque of the drive motor 321 is the target torque, and the vehicle control module 31 sends an engagement command to the disconnection control module 34 to put the disconnection control module 34 in the engagement (Engage) mode, thereby controlling the power disconnection device 4 to engage with the synchronizer 322, that is, at this time the power transmission between the front axle 1 and the drive motor 321 is connected, and the front axle 1 has power output.

[0055] Optionally, the drive motor 321 may be a permanent magnet synchronous motor (PM) or other drive motors, and this application does not impose any specific limitation on this.

[0056] Here, it is worth noting that the number of drive motors in the first motor module 32 provided in the present application can be set according to actual needs. For example, if you want to reduce the production cost, the first motor module 32 can include only one drive motor to control the two front wheels corresponding to the front axle 1 at the same time, and the second motor module 33 can include only one drive motor to control the two rear wheels corresponding to the rear axle 2 at the same time. Assuming that you want to improve the precise control of the two front wheels and the two rear wheels, the first motor module 32 may include two drive motors to control the two front wheels corresponding to the front axle 1 respectively, and the second motor module 33 may include two drive motors to control the two rear wheels corresponding to the rear axle 2 respectively. The number of drive motors can be set according to actual needs, and this application does not make specific restrictions on this.

[0057] Optional, such as Figure 5As shown, the power disconnect device 4 may include a shift motor 41 and a shift fork 42. The shift motor 41 is connected to the disconnect control module 34 and the shift fork 42. When the disconnect control module 34 receives a disconnect command, it enters a disconnect mode, and controls the shift motor 41 to drive the shift fork 42 away from the synchronizer 322 to disengage from the synchronizer 322, or controls the shift motor 41 to drive the shift fork 42 to enter a separation gear position to disengage from the synchronizer 322; when the disconnect control module 34 receives a coupling command, it enters a coupling mode, and controls the shift motor 41 to drive the shift fork 42 close to the synchronizer 322 to couple with the synchronizer 322, or controls the shift motor 41 to drive the shift fork 42 to enter a coupling gear position to couple with the synchronizer 322. The power disconnect device 4 may also adopt other structures or devices that can achieve the above functions, and this application does not make specific restrictions on this.

[0058] In order to avoid the problem that the disconnection control module 34 fails after the vehicle is powered on, causing the first motor module 32 to overheat and burn, the disconnection control module 34 provided in the present application can control the power disconnection device 4 to be separated from the front axle 1 when the vehicle is powered off, so that the power disconnection device 4 before the vehicle is powered off is in the disconnection mode. At this time, if the vehicle is powered on again and the vehicle control module 31 does not send a combination instruction to the disconnection control module 34, the disconnection control module 34 will maintain the mode before the last power-off (i.e., disconnection mode) to avoid the situation that after the vehicle is powered on, the vehicle control module 31 does not send a combination instruction to the disconnection control module 34, and the disconnection control module 34 maintains the disconnection mode before power-off, resulting in a state conflict between the disconnection control module 34 and the vehicle control module 31, so that the second motor module 33 and the rear axle 2 drag the first motor module 32 and the front axle 1 to run, resulting in the problem that the first motor module 32 overheats and burns, thereby improving the service life of the front axle 1 and the first motor module 32, so as to ensure the reliability of the use of the front axle 1 and the first motor module 32. At the same time, a certain degree of safety is improved.

[0059] In one example, if Figure 6As shown, the vehicle also includes a power battery 5, and the disconnection control module 34 is connected to the power battery 5. The disconnection control module 34 is also used to obtain the working status of the power battery 5 to know the power-off status of the vehicle in real time. Here, it is worth noting that when the working status of the power battery 5 refers to the power battery 5 not working, the vehicle is under high voltage at this time, and when the working status of the power battery 5 refers to the power battery 5 working, the vehicle is under high voltage at this time. In this example, when the working state of the power battery 5 obtained by the disconnection control module 34 refers to the power battery 5 not working, it refers to the vehicle being powered off at this time, and the disconnection control module 34 will control the power disconnection device 4 to be separated from the front axle 1, so that the power disconnection device 4 before the vehicle is powered off is in the disconnection mode. At this time, if the vehicle is powered on again, and the vehicle control module 31 does not send a combination instruction to the disconnection control module 34, the disconnection control module 34 will maintain the mode before the last power-off (i.e., disconnection mode) to avoid the vehicle being powered on, the vehicle control module 31 does not send a combination instruction to the disconnection control module 34, and the disconnection control module 34 maintains the disconnection mode before power-off, resulting in a state conflict between the disconnection control module 34 and the vehicle control module 31, so that the second motor module 33 and the rear axle 2 drag the first motor module 32 and the front axle 1 to run, resulting in the problem of overheating and burning of the first motor module 32, thereby improving the service life of the front axle 1 and the first motor module 32, so as to ensure the reliability of the use of the front axle 1 and the first motor module 32. At the same time, a certain degree of safety is improved.

[0060] In one example, if Figure 7 As shown, the disconnection control module 34 may include a control unit 341 and a detection unit 342, the detection unit 342 is connected to the control unit 341 and the power battery 5, the control unit 341 is connected to the power disconnection device 4, the detection unit 342 is used to detect the working state of the power battery and send it to the control unit 341, when the working state refers to the power battery 5 not working, the control unit 341 controls the power disconnection device 4 to be disconnected from the front axle. In this way, by setting the detection unit 342, the working state of the power battery 5 can be detected in real time to improve the detection accuracy, thereby improving the reliability of the control unit 341 controlling the power disconnection device 4 to be disconnected from the front axle 1.

[0061] Optionally, a battery relay is usually provided in the power battery 5, and the detection unit 342 is used to detect the on / off state of the battery relay to detect the working state of the power battery 5. Exemplarily, when the battery relay is closed, the power battery 5 is working, that is, at this time, the vehicle is on high voltage, and when the detection unit 342 detects that the battery relay is in a closed state, a signal that the power battery 5 is not working is sent to the control unit 341; for example, when the battery relay is disconnected, the power battery 5 is not working, that is, at this time, the vehicle is off high voltage, and when the detection unit 342 detects that the battery relay is in a disconnected state, a signal that the power battery 5 is working is sent to the control unit 341.

[0062] When the disconnect control module 34 is in the engagement mode, the front axle 1 and the first motor module 32 are in the auxiliary drive mode. In order to avoid the problem of overheating and burning of the first motor module 32 after working for a long time, in one example, Figure 8 As shown, the power control system 3 further includes a temperature sensor 35, which is connected to the first motor module 32 and the disconnection control module 34, and is used to detect the temperature of the first motor module 32. When the temperature sensor 35 detects that the temperature of the first motor module 32 is greater than or equal to the first temperature threshold, it means that the temperature of the first motor module 32 has approached or exceeded the maximum withstand temperature of the first motor module 32, that is, the first motor module 32 is in the over-temperature level 3 fault state, and the temperature sensor 35 will send a first fault instruction to the disconnection control module 34, and the disconnection control module 34 is also used to control the power disconnection device 4 to be disconnected from the front axle 1 according to the first fault instruction, so that the first motor module 32 and the front axle 1 stop outputting power.

[0063] In this example, the temperature of the first motor module 32 in the auxiliary drive mode is detected in real time by the temperature sensor 35, and when it is detected that the temperature of the first motor module 32 is greater than or equal to the first temperature threshold, a first fault instruction is sent to the disconnection control module 34, so that the disconnection control module 34 controls the power disconnection device 4 to disengage from the front axle 1 based on the first fault instruction, so that the first motor module 32 and the front axle 1 stop outputting power, thereby avoiding the problem that the first motor module 32 works for too long or is in a third-level overtemperature fault state due to other factors, causing the first motor module 32 to continue to work and be burned due to overheating, so as to improve the working reliability of the first motor module 32 and the service life of the first motor module 32, thereby ensuring the operating reliability of the power control system 3 and the vehicle.

[0064] In order to avoid the problem that the disconnection control module 34 fails to enter the disconnection mode, resulting in the power disconnection device 4 being unable to be disconnected from the front axle 1 in time, causing the first motor module 32 to still be overheated and burned, in one example, Figure 8As shown, the vehicle control module 31 is also connected to the temperature sensor 35. The vehicle control module 31 is used to receive a first fault instruction and adjust the output torque of the first motor module 32 and the second motor module 33 to zero based on the first fault instruction so that the front axle 1 and the rear axle 2 stop outputting power. In this example, the temperature sensor 35 will also send the first fault instruction to the vehicle control module 31. After receiving the first fault instruction, the vehicle control module 31 will detect the current mode of the disconnect control module 34. When the vehicle control module 31 detects that the disconnect control module 34 is in the engagement mode at this time, it is known that the disconnect control module 34 has a fault and cannot enter the disconnect mode. The vehicle control module 31 will adjust the output torque of the first motor module 32 and the second motor module 33 to zero, so that the front axle 1 and the rear axle 2 stop outputting power, thereby limiting the power of the whole vehicle and stopping the vehicle, thereby avoiding the disconnect control module 34 from failing to enter the disconnect mode, resulting in the power disconnect device 4 being unable to disengage from the front axle 1 in time, resulting in the first motor module 32 still having the problem of overheating and burning, so as to further improve the working reliability and service life of the first motor module 32, thereby ensuring the operating reliability of the power control system 3 and the vehicle.

[0065] Optionally, a detection structure may be provided in the vehicle control module 31. After the disconnection control module 34 receives the first fault instruction, the detection structure detects the current mode of the disconnection control module 34 and generates a corresponding disconnection control module error status (Actuator Control Unit System Error Status, ACU _ SysErrSt) signal, when the detection structure detects that the current mode of the disconnect control module 34 is the disconnect mode, the ACU obtained by the vehicle control module 31 _ SysErrSt indicates that the disconnection control module 34 has not failed at this time, and the disconnection control module 34 remains in the disconnection mode. When the detection structure detects that the current mode of the disconnection control module 34 is the combined mode, the ACU obtained by the vehicle control module 31 _ SysErrSt indicates that the disconnect control module 34 fails at this time, and the vehicle control module 31 will adjust the output torque of the first motor module 32 and the second motor module 33 to zero, so that the front axle 1 and the rear axle 2 stop outputting power, thereby limiting the power of the vehicle and stopping the vehicle.

[0066] After the vehicle stops, the temperature sensor 35 will still detect the temperature of the first motor module 32 in real time. When the temperature sensor 35 detects that the temperature of the first motor module 32 is equal to or less than the second temperature threshold, it is worth noting that the second temperature threshold is less than the first temperature threshold. When the temperature sensor 35 detects that the temperature of the first motor module 32 is equal to or less than the second temperature threshold, it means that the first motor module 32 has left the over-temperature level 3 fault state and is in the over-temperature level 2 fault state. At this time, the vehicle does not need to be in a stopped state. The temperature sensor 35 will send a second fault instruction to the vehicle control module 31. The vehicle control module 31 is also used to adjust the output torque of the second motor module 33 to the target torque according to the second fault instruction. At this time, the target torque is greater than zero, that is, the vehicle control module 31 will cancel part of the power restriction so that the vehicle can be in a driving state. Exemplarily, assuming that the second temperature threshold is 190 (℃), when the temperature sensor 35 detects that the temperature of the first motor module 32 is equal to or less than 190℃, the vehicle control module 31 will adjust the output torque of the second motor module 33 to the target torque so that the vehicle can maintain 40 kilometers per hour (kilometers per hour, kph). In this way, the first motor module 32 can be prevented from overheating and burning, and the service life of the first motor module 32 can be ensured. At the same time, the vehicle can be in a driving state to avoid the vehicle being in a stopped state and affecting the user experience, so as to improve a certain user experience.

[0067] In one example, if Fig. 9 As shown, the vehicle also includes a display device 6, and the power control system 3 also includes a prompt module 36. The prompt module 36 is connected to the temperature sensor 35 and the display device 6. The prompt module 36 is used to receive the first fault instruction and the second fault instruction from the prompt module 35. When the prompt module 36 receives the first fault instruction, it controls the display device 6 to display the fault; when the prompt module receives the second fault instruction, it controls the display device 6 to stop displaying the fault. In this example, when the temperature sensor 35 detects that the temperature of the first motor module 32 is equal to or greater than the first temperature threshold, and at this time the ACU obtained by the vehicle control module 31 _ The SysErrSt signal indicates that when the disconnect control module 34 fails, the temperature sensor 35 will send the first fault instruction to the prompt module 36, and the vehicle control module 31 will also send the ACU _The SysErrSt signal is sent to the prompt module 36 through the gateway, so that the prompt module 36 can control the display device 6 to display the fault. At this time, the display device 6 is controlled to display "disconnect the control module 34 and the first motor module 32" to remind the user that the first motor module 32 in the vehicle is overheated and the disconnection control module 34 is faulty. The power control system 3 needs to control the vehicle to stop to avoid the problem of the first motor module 32 being overheated and burned. In this way, the fault information of the vehicle can be fed back to the user in real time through the prompt module 36 and the display device 6, so that the user can know the fault problem of the vehicle in real time to further improve the user experience.

[0068] Optionally, the display device 6 may be a central control screen, a dashboard or other display structure in the vehicle, and this application does not impose any specific limitation on this.

[0069] In summary, the disconnection control module 34 in the power control system 3 provided in the present application can control the power disconnection device 4 to be engaged with or disengaged from the front axle 1 to meet different requirements of the vehicle. Among them, when the working state of the power battery 5 obtained by the disconnection control module 34 refers to that the power battery 5 is not working, that is, when the vehicle is powered off, the disconnection control module 34 will control the power disconnection device 4 to be separated from the front axle 1, so that the power disconnection device 4 before the vehicle is powered off is in the disconnection mode. At this time, if the vehicle is powered on again, and the whole vehicle control module 31 does not send a combination instruction to the disconnection control module 34, the disconnection control module 34 will maintain the mode before the last power-off (i.e., disconnection mode) to avoid that after the vehicle is powered on, the whole vehicle control module 31 does not send a combination instruction to the disconnection control module 34, and the disconnection control module 34 maintains the disconnection mode before power-off, resulting in a state conflict between the disconnection control module 34 and the whole vehicle control module 31, so that the second motor module 33 and the rear axle 2 drag the first motor module 32 and the front axle 1 to run, resulting in the problem of overheating and burning of the first motor module 32, thereby improving the service life of the front axle 1 and the first motor module 32 to ensure the reliability of the use of the front axle 1 and the first motor module 32. At the same time, a certain degree of safety is improved.

[0070] The present application also provides a control method for a power control system, which is applied to a power control system 3. Fig.10 It is a schematic flow chart of a power control system provided in an embodiment of the present application; the method 100 includes S101 to S103; S101 to S103 are described in detail below.

[0071] Among them, the power control system 3 can refer to the above-mentioned Figures 1 to 9The power control system 3 described in any optional manner is applied to a vehicle. For example, the vehicle includes a front axle 1, a rear axle 2 and a power control system 3. The power control system 3 includes a vehicle control module 31, a first motor module 32 and a second motor module 33.

[0072] Control methods include:

[0073] S101, obtaining a join instruction or a disconnect instruction.

[0074] S102: Control the power disconnect device to engage with or disengage from the front axle according to the engagement instruction or the disconnection instruction.

[0075] For example, Figure 3 As shown, the vehicle includes a power disconnect device 4, which is located between the first motor module 32 and the front axle 1. The power control system 3 also includes a disconnect control module 34, which is connected to the vehicle control module 31. The disconnect control module 34 receives a connection instruction or a disconnect instruction from the vehicle control module 31, and controls the power disconnect device 4 to connect or disconnect with the front axle 1 according to the connection instruction or the disconnect instruction.

[0076] In this example, if you want to reduce energy consumption to achieve energy saving, the vehicle control module 31 will send a shutdown command to the disconnection control module 34, and the disconnection control module 34 controls the power disconnection device 4 to disconnect from the front axle 1 based on the shutdown command, that is, the power transmission between the front axle 1 and the first motor module 32 is disconnected, the front axle 1 has no power output, and only the rear axle 2 has power output to achieve energy saving. If you want to increase the power output of the vehicle so that the vehicle can achieve stable driving in special scenarios, the vehicle control module 31 will send a connection command to the disconnection control module 34, and the disconnection control module 34 controls the power disconnection device 4 to connect with the front axle 1 based on the connection command, that is, the power transmission between the front axle 1 and the first motor module 32 is connected. At the same time, the vehicle control module 31 will also send a control signal to the first motor module 32, so that the first motor module 32 is in torque mode, that is, the first motor module 32 can drive the front axle 1 to output power according to the control signal. The control signal here at least includes the above-mentioned target torque, target speed and braking requirements, etc. At this time, both the front axle 1 and the rear axle 2 have power output to increase the power output of the vehicle, thereby improving the driving stability of the vehicle in special scenarios.

[0077] S103: When the vehicle is powered off, control the power disconnect device to disengage from the front axle.

[0078] In this example, the disconnection control module 34 can control the power disconnection device 4 to disengage from the front axle 1 when the vehicle is powered off, so that the power disconnection device 4 is in the disconnection mode before the vehicle is powered off. At this time, if the vehicle is powered on again and the vehicle control module 31 does not send a connection instruction to the disconnection control module 34, the disconnection control module 34 will maintain the mode before the last power-off (i.e., disconnection mode) to avoid the situation that after the vehicle is powered on, the vehicle control module 31 does not send a connection instruction to the disconnection control module 34, and the disconnection control module 34 maintains the disconnection mode before power-off, resulting in a state conflict between the disconnection control module 34 and the vehicle control module 31, so that the second motor module 33 and the rear axle 2 drag the first motor module 32 and the front axle 1 to run, resulting in the problem of overheating and burning of the first motor module 32, thereby improving the service life of the front axle 1 and the first motor module 32 to ensure the reliability of the use of the front axle 1 and the first motor module 32. At the same time, a certain degree of safety is improved.

[0079] For example, Figure 6 As shown, the vehicle also includes a power battery 5, and the disconnection control module 34 is connected to the power battery 5. The disconnection control module 34 is also used to obtain the working status of the power battery 5 to know the power-off status of the vehicle in real time. Here, it is worth noting that when the working status of the power battery 5 refers to the power battery 5 not working, the vehicle is under high voltage at this time, and when the working status of the power battery 5 refers to the power battery 5 working, the vehicle is under high voltage at this time. When the working state of the power battery 5 obtained by the disconnection control module 34 indicates that the power battery 5 is not working, indicating that the vehicle is powered off at this time, the disconnection control module 34 will control the power disconnection device 4 to be separated from the front axle 1, so that the power disconnection device 4 before the vehicle is powered off is in the disconnection mode. At this time, if the vehicle is powered on again, and the vehicle control module 31 does not send a combination instruction to the disconnection control module 34, the disconnection control module 34 will maintain the mode before the last power-off, so as to avoid that after the vehicle is powered on, the vehicle control module 31 does not send a combination instruction to the disconnection control module 34, and the disconnection control module 34 maintains the disconnection mode before power-off, resulting in a state conflict between the disconnection control module 34 and the vehicle control module 31, so that the second motor module 33 and the rear axle 2 drag the first motor module 32 and the front axle 1 to run, resulting in the problem of overheating and burning of the first motor module 32, thereby improving the service life of the front axle 1 and the first motor module 32, so as to ensure the reliability of the use of the front axle 1 and the first motor module 32. At the same time, a certain degree of safety is improved.

[0080] For example, Figure 7As shown, the disconnection control module 34 may include a control unit 341 and a detection unit 342, the detection unit 342 is connected to the control unit 341 and the power battery 5, the control unit 341 is connected to the power disconnection device 4, the detection unit 342 is used to detect the working state of the power battery and send it to the control unit 341, when the working state refers to the power battery 5 not working, the control unit 341 controls the power disconnection device 4 to be disconnected from the front axle. In this way, by setting the detection unit 342, the working state of the power battery 5 can be detected in real time to improve the detection accuracy, thereby improving the reliability of the control unit 341 controlling the power disconnection device 4 to be disconnected from the front axle 1.

[0081] When the disconnect control module 34 is in the engagement mode, the front axle 1 and the first motor module 32 are in the auxiliary drive mode. In order to avoid the problem of overheating and burning of the first motor module 32 after working for a long time, the control method provided in the present application also includes: obtaining a first fault instruction; controlling the power disconnect device to disengage from the front axle according to the first fault instruction.

[0082] For example, Figure 8 As shown, the power control system 3 further includes a temperature sensor 35, which is connected to the first motor module 32 and the disconnection control module 34, and is used to detect the temperature of the first motor module 32. When the temperature sensor 35 detects that the temperature of the first motor module 32 is greater than or equal to the first temperature threshold, it means that the temperature of the first motor module 32 has approached or exceeded the maximum withstand temperature of the first motor module 32, that is, the first motor module 32 is in the over-temperature level 3 fault state, and the temperature sensor 35 will send a first fault instruction to the disconnection control module 34, and the disconnection control module 34 is also used to control the power disconnection device 4 to be disconnected from the front axle 1 according to the first fault instruction, so that the first motor module 32 and the front axle 1 stop outputting power.

[0083] The relationship between the vehicle control module 31, the first motor module 32 and the disconnection control module 34 in the control method provided by the present application is shown in the figure below: Fig.11As shown, the vehicle control module 31 will send a connection instruction to the disconnection control module 34, and the disconnection control module 34 will execute the connection mode based on the connection instruction, so that the first motor module 32 will execute the torque mode, that is, the first motor module 32 is in the auxiliary drive mode at this time. When the vehicle is powered off, the vehicle control module 31 will control the disconnection control module 34 to be in the disconnection mode, and the first motor module 32 is powered off and in the preparation mode. When the vehicle is powered on again, the disconnection control module 34 will remain in the disconnection mode. At this time, the vehicle control module 31 does not send a control signal to the first motor module 32, and the first motor module 32 remains in the preparation mode. When the vehicle control module 31 sends a shutdown instruction to the disconnection control module 34, the disconnection control module 34 executes the shutdown mode, and the state of the first motor module 32 jumps to the corresponding mode; when the vehicle control module 31 sends a connection instruction to the disconnection control module 34, the disconnection control module 34 executes the connection mode, and the state of the first motor module 32 jumps to the corresponding torque mode, so that the front axle 1 outputs power to enter the auxiliary drive mode.

[0084] The relationship between the vehicle control module 31, the first motor module 32, the second motor module 33, the disconnection control module 34 and the prompt module 36 in the control method provided by the present application is shown in the figure below: Fig.12 As shown, when it is detected that the first motor module 32 is in the over-temperature level 3 fault state, the disconnection control module 34 needs to be disconnected to execute the disconnection mode. At this time, it is necessary to determine whether the disconnection control module 34 is faulty. If the disconnection control module 34 is faulty, the "yes" step is executed, and the vehicle control module 31 will limit the power of the second motor module 33 so that the output torque of the second motor module 33 is zero, so that the vehicle is in a stopped state. At the same time, it is also necessary to report the fault to the prompt module 36 so that the prompt module 36 displays the fault. When it is detected that the first motor module 32 is in the over-temperature level 2 fault state, at this time, the vehicle control module 31 will limit part of the power of the second motor module 33 so that the output torque of the second motor module 33 is greater than zero to enter the torque mode, so that the vehicle is in a driving state.

[0085] The control method of the power control system provided in the present application is applied to the power control system 3 of the above-mentioned embodiment, thereby having all the beneficial effects of the power control system 3 in any of the above-mentioned embodiments, which will not be repeated here.

[0086] The vehicle provided in the present application includes a front axle 1, a rear axle 2 and a power control system 3. The front axle 1 is connected to the front wheels of the vehicle, the rear axle 2 is connected to the rear wheels of the vehicle, and the power control system 3 is connected to the front axle 1 and the rear axle 2. The power control system 3 can control the front axle 1 and the rear axle 2 to drive the front wheels and the rear wheels accordingly to achieve functions such as acceleration, deceleration, and braking. The vehicle includes the power control system 3, so that it has all the beneficial effects of the power control system 3 in any of the above embodiments, which will not be repeated here.

[0087] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0088] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0089] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A power control system, characterized in that: The power control system is applied to a vehicle, the vehicle comprising a front axle and a power disconnect device; the power control system comprises: Vehicle control module; and, A disconnection control module, wherein the disconnection control module is connected to the vehicle control module and the power disconnect device, wherein the disconnection control module receives an engagement instruction or a disconnection instruction from the vehicle control module, and controls the power disconnect device to engage or disengage with the front axle according to the engagement instruction or the disconnection instruction; when the vehicle is powered off, the disconnection control module controls the power disconnect device to disengage with the front axle.

2. The power control system according to claim 1, characterized in that: The vehicle also includes a power battery; the disconnection control module is connected to the power battery, and the disconnection control module is also used to obtain the working status of the power battery. When the working status indicates that the power battery is not working, the disconnection control module controls the power disconnection device to disengage from the front axle.

3. The power control system according to claim 2, characterized in that: The disconnection control module comprises: a control unit; and, A detection unit, wherein the detection unit is connected to the control unit and the power battery, and the detection unit is used to detect the working state of the power battery and send it to the control unit. When the working state indicates that the power battery is not working, the control unit controls the power disconnect device to disengage from the front axle.

4. The power control system according to claim 1, characterized in that: The power control system further includes: The first motor module is connected to the front axle and the vehicle control module. When the vehicle control module sends a connection instruction to the disconnection control module, the vehicle control module is also used to send a control signal to the first motor module. The first motor module drives the front axle to output power according to the control signal.

5. The power control system according to claim 4, characterized in that: The power control system further includes: A temperature sensor is connected to the first motor module and the disconnection control module, and is used to detect the temperature of the first motor module. When the temperature sensor detects that the temperature of the first motor module is greater than or equal to a first temperature threshold, a first fault instruction is sent to the disconnection control module. The disconnection control module is also used to control the power disconnect device to disengage from the front axle according to the first fault instruction.

6. The power control system according to claim 5, characterized in that: The vehicle also includes a rear axle, and the power control system further includes: A second motor module, the second motor module is connected to the rear axle and the vehicle control module; Among them, the vehicle control module is also connected to the temperature sensor, and the vehicle control module is used to receive the first fault instruction, and based on the first fault instruction, adjust the output torque of the first motor module and the second motor module to zero so that the front axle and the rear axle stop outputting power.

7. The power control system according to claim 6, characterized in that: When the temperature sensor detects that the temperature of the first motor module is equal to or less than a second temperature threshold, the temperature sensor sends a second fault instruction to the vehicle control module, and the vehicle control module is further used to adjust the output torque of the second motor module to a target torque according to the second fault instruction, and the target torque is greater than zero; The second temperature threshold is lower than the first temperature threshold.

8. The power control system according to claim 7, characterized in that: The vehicle further includes a display device, and the power control system further includes: A prompt module, the prompt module is connected to the temperature sensor and the display device, the prompt module is used to receive the first fault instruction and the second fault instruction from the temperature sensor, when the prompt module receives the first fault instruction, the display device is controlled to display the fault; when the prompt module receives the second fault instruction, the display device is controlled to stop displaying the fault.

9. A control method for a power control system, characterized in that: Applied to the power control system according to any one of claims 1 to 8, the power control system includes a vehicle control module and a disconnection control module; the control method includes: Get a join instruction or a break instruction; Controlling the power disconnect device to engage or disengage with the front axle according to the engagement instruction or the disconnection instruction; When the vehicle is powered off, the power disconnect device is controlled to be disengaged from the front axle.

10. The control method according to claim 9, characterized in that: The power control system further includes a temperature sensor, and the control method further includes: Obtaining a first fault instruction; The power disconnect device is controlled to be disengaged from the front axle according to the first fault instruction.

11. A vehicle, characterized in that: The vehicle comprises a front axle, a rear axle, a power disconnect device, a power battery and a power control system as described in any one of claims 1 to 8, and the power control system is electrically connected to the front axle, the rear axle, the power disconnect device and the power battery.

Images