CN116424354A

CN116424354A - Control method and device under BSG motor fault mode and vehicle

Info

Publication number: CN116424354A
Application number: CN202310224051.1A
Authority: CN
Inventors: 闫壮壮
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-07-14

Abstract

The application provides a control method and device under a BSG motor fault mode and a vehicle. The method is applied to a 48V mild hybrid vehicle and comprises the following steps: when the power-on of the vehicle is detected, receiving a first BSG motor state signal; if the BSG motor of the vehicle is determined to be in a preset fault state based on the first BSG motor state signal, a relay of a 48V battery in the vehicle is controlled to be kept in an off state; wherein a relay of the 48V battery is used to control the output of the 48V battery. The method and the device can solve the problem that when the internal hardware of the BSG motor is damaged, the motor is likely to be ignited when the output voltage of the 48V battery is controlled.

Description

Control method and device under BSG motor fault mode and vehicle

Technical Field

The present disclosure relates to the field of motors, and in particular, to a control method and apparatus for a BSG motor in a failure mode, and a vehicle.

Background

The 48V light hybrid system is a light hybrid system with a P0 architecture, and can effectively save fuel, improve driving feeling and improve network loss of electric appliances of the whole vehicle. Compared with a traditional vehicle type (12V battery), the 48V light hybrid system is added with a DCDC (direct current converter), a 48V BSG (Belt-Driven Starter Generator integrated machine which utilizes Belt transmission to realize both starting and power generation) motor and a 48V battery, as shown in figure 1. Conventionally, a 48V light hybrid vehicle is powered on and then powered on by a BSG.

When the hardware of the BSG motor of the 48V light hybrid vehicle fails, the normal work of the BSG motor is affected, and a driver can control the vehicle to sleep or power off and then power on again to try to start. When the vehicle is powered on again, if the BSG motor still has hardware failure, the 48V battery outputs voltage at this time, and the motor is liable to fire.

Disclosure of Invention

The embodiment of the application provides a control method and device under a BSG motor fault mode and a vehicle, and aims to solve the problem that when a hardware fault exists in a BSG motor, 48V battery output voltage is controlled, and motor ignition is easy to cause.

In a first aspect, an embodiment of the present application provides a control method in a BSG motor failure mode, which is applied to a 48V mild hybrid vehicle, including:

when the power-on of the vehicle is detected, receiving a first BSG motor state signal;

if the BSG motor of the vehicle is determined to be in a preset fault state based on the first BSG motor state signal, a relay of a 48V battery in the vehicle is controlled to be kept in an off state;

wherein a relay of the 48V battery is used to control the output of the 48V battery.

In one possible implementation, after receiving the first BSG motor status signal, the control method in the BSG motor failure mode further includes:

if the BSG motor is determined to be in a ready-to-operate state based on the first BSG motor state signal, after the bus voltage of the direct current converter of the vehicle reaches the pre-charge target voltage, controlling a relay of the 48V battery to be closed;

after the self-checking is successful, the BSG motor enters a ready-to-operate state.

In one possible implementation, controlling relay closure for a 48V battery includes:

sending a closing control signal to the BMS of the 48V battery; the close control signal is used to instruct the BMS of the 48V battery to control the relay of the 48V battery to close.

In one possible implementation, the BSG motor performs a first self-test when the vehicle is powered up and sends a first BSG motor status signal based on the first self-test result.

In one possible implementation, after the relay controlling the 48V battery in the vehicle remains in an off state, the control method in the BSG motor failure mode further includes:

receiving a secondary BSG motor state signal;

if the BSG motor is still in the preset fault state based on the secondary BSG motor state signal, controlling a relay of the 48V battery to keep in an off state;

and after the primary self-checking fails, the BSG motor performs secondary self-checking, and sends a secondary BSG motor state signal based on a secondary self-checking result.

In one possible implementation, after the relay controlling the 48V battery continues to maintain the off state, the control method in the BSG motor failure mode further includes:

prompting a user that the BSG motor enters a non-response state and requesting hardware replacement processing;

and after the secondary self-checking fails, the BSG motor enters a non-response state.

In one possible implementation, receiving the first BSG motor status signal when a power-up of the vehicle is detected includes:

and when the BSG motor is determined to be in a preset fault state, detecting that the vehicle is powered down and then powered up again, receiving a first BSG motor state signal.

In a second aspect, an embodiment of the present application provides a control device in a BSG motor failure mode, which is applied to a 48V mild hybrid vehicle, including:

the receiving module is used for receiving a first BSG motor state signal when the power-on of the vehicle is detected;

the control module is used for controlling a relay of a 48V battery in the vehicle to keep a disconnected state if the BSG motor of the vehicle is determined to be in a preset fault state based on the first BSG motor state signal;

In a third aspect, an embodiment of the present application provides a control device, including a processor and a memory, where the memory is configured to store a computer program, and the processor is configured to invoke and run the computer program stored in the memory, to execute a control method in a BSG motor failure mode according to the first aspect or any one of possible implementation manners of the first aspect.

In a fourth aspect, embodiments of the present application provide a vehicle comprising a control apparatus according to the third aspect.

In a fifth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program, which when executed by a processor implements the steps of a control method in BSG motor failure mode as described above in the first aspect or any one of the possible implementations of the first aspect.

The embodiment of the application provides a control method and device under a BSG motor fault mode and a vehicle, when the vehicle is electrified, if the BSG motor of the vehicle is determined to be in a preset fault state based on a received first motor state signal, namely, the damage of hardware in the BSG motor is determined, a relay of a 48V battery in the vehicle is controlled to be in an open state, and the relay is not closed, namely, the 48V battery is controlled not to output voltage, so that the problem that the motor fires are easily caused when the hardware in the BSG motor is damaged is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a 48V light mixing system;

FIG. 2 is a flowchart of a control method in a failure mode of a BSG motor according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a control device in a BSG motor failure mode according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram of a control device according to an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the following description will be made with reference to the accompanying drawings by way of specific embodiments.

Referring to fig. 2, a flowchart of an implementation of a control method in a BSG motor failure mode according to an embodiment of the present application is shown, where the control method in the BSG motor failure mode is applied to a 48V mild hybrid vehicle. The execution subject of the method may be a control device, which may be an HCU (Hybrid Control Unit, hybrid vehicle controller).

The control method under the failure mode of the BSG motor is described in detail as follows:

in S201, when a power-up of the vehicle is detected, a first BSG motor status signal is received.

In one possible implementation, the BSG motor has a self-checking function, and the BSG motor can only work normally after the self-checking is successful. When the vehicle is electrified, the BSG motor automatically performs self-checking, detects whether the motor has faults or not, if the motor has faults, the motor reports corresponding fault signals, and if the motor has no faults or the motor has faults which do not affect the normal operation of the BSG motor, the motor enters a ready-to-operate state and reports the state signals.

In another possible implementation, the BSG motor may store the state signal prior to the last power down, and the BSG motor may send the stored state signal directly when the vehicle is powered up again.

In this embodiment, the first BSG motor status signal may be used to represent the BSG motor first self-test result. If the primary self-checking result of the BSG motor indicates that a fault exists, that is, the self-checking fails, the primary BSG motor status signal is a corresponding fault status signal, and may specifically be a corresponding fault type signal. If the primary self-checking result of the BSG motor is that the self-checking is successful, namely, no fault exists or the normal operation of the BSG motor is not affected by the fault, the BSG motor enters a ready-to-operate state, and the primary BSG motor state signal is the current operating state of the BSG motor, namely, the ready-to-operate state signal.

In S202, if it is determined that the BSG motor of the vehicle is in a preset fault state based on the first BSG motor state signal, controlling a relay of a 48V battery in the vehicle to maintain an off state;

The preset fault state is used for indicating that the internal hardware of the BSG motor is damaged, and specifically can be a disable fault state, wherein the fault state is the highest-level fault state of the BSG motor, and the BSG motor cannot work normally in the fault state. The fault state indicates hardware damage inside the BSG motor, specifically, MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) ablation and/or GDU (Gate Drive Unit) damage inside the BSG motor.

The relay of the 48V battery is used to control the output of the 48V battery. When the relay of the 48V battery is in a closed state, the 48V battery can output voltage; when the relay of the 48V battery is in an off state, the 48V battery does not output a voltage.

In the embodiment, when the BSG motor of the vehicle is determined to be in the preset fault state based on the first BSG motor state signal, in order to avoid the condition that the BSG motor fires caused by the large current impact generated by the closing of the relay, the relay of the 48V battery in the vehicle is controlled to be kept in an open state, namely, the relay is not controlled to be closed.

Since the relay of the 48V battery is in the off state by default, the embodiment can control the relay of the 48V battery to maintain the off state by sending the off control signal, or can not send any control signal, so as to maintain the off state continuously.

When the vehicle is electrified, if the BSG motor of the vehicle is determined to be in a preset fault state based on the received first motor state signal, namely, if the internal hardware of the BSG motor is determined to be damaged, the relay of the 48V battery in the vehicle is controlled to be in an open state and not closed, namely, the 48V battery is controlled not to output voltage, so that the problem that when the internal hardware of the BSG motor is damaged, the relay of the 48V battery is closed to generate heavy current impact, and then the motor is possibly caused to fire, and the problem that the vehicle is possibly caused to fire can be solved, and the safety of the vehicle can be improved.

In some embodiments, after the step S201, the control method in the BSG motor fault mode may further include:

If the BSG motor is determined to be currently in the ready-to-operate state based on the first BSG motor state signal, it is determined that the BSG motor is successfully self-inspected for the first time, that is, the BSG is not currently in the disable fault, in this case, the relay of the 48V battery is closed, and no large current surge is generated, so that after the bus voltage of the direct current converter (DCDC) of the vehicle is detected to reach the pre-charge target voltage, the relay of the 48V battery can be controlled to be closed, so that the 48V battery outputs the voltage.

The pre-charge target voltage may be set according to actual requirements, and is not particularly limited herein.

In some embodiments, controlling the relay closure of the 48V battery may include:

sending a close control signal to a BMS (Battery Management System ) of the 48V battery; the close control signal is used to instruct the BMS of the 48V battery to control the relay of the 48V battery to close.

In this embodiment, the HCU can control the on-off of the relay of the 48V battery through the BMS of the 48V battery.

The relay of the 48V battery may be a relay built in the BMS of the 48V battery for controlling the output of the 48V battery.

In some embodiments, the BSG motor performs a first self-test when the vehicle is powered up and sends a first BSG motor status signal based on the first self-test result.

After the vehicle is electrified, the BSG motor can automatically perform self-checking to detect whether the motor has faults or not. After the vehicle is electrified, the first self-test performed by the BSG motor is called first self-test. The BSG motor may generate a first BSG motor status signal according to the first self-test result and send the first BSG motor status signal to the HCU.

In some embodiments, in S202 above: the control method in the BSG motor failure mode described above may further include, after the relay controlling the 48V battery in the vehicle is maintained in an off state:

receiving a secondary BSG motor state signal;

In order to avoid false self-detection of the BSG motor, after the first self-detection fails, the BSG motor performs secondary self-detection, generates a secondary BSG motor state signal according to a secondary self-detection result, and reports the secondary BSG motor state signal.

The secondary BSG motor state signal has similar effect to the primary BSG motor state signal, and aims at secondary self-detection and primary self-detection respectively.

If the BSG motor is still in the preset fault state based on the secondary BSG motor state signal, the relay controlling the 48V battery is kept in the off state to avoid fire caused by large current impact. If the BSG motor is determined to be in a ready-to-operate state based on the secondary BSG motor state signal, after the bus voltage of the direct current converter of the vehicle reaches the pre-charge target voltage, the relay of the 48V battery is controlled to be closed.

In some embodiments, after the relay controlling the 48V battery continues to maintain the open state, the control method in the BSG motor failure mode further includes:

And after the secondary self-checking fails, the BSG motor automatically enters a non-response state. In this state, the BSG motor no longer responds to control commands of the various controllers. The BSG motor can work normally only after the damaged hardware of the BSG motor is replaced.

In this embodiment, if it is determined that the BSG motor is still in the preset failure state based on the secondary BSG motor state signal, the user may be prompted to enter the unresponsive state by an instrument or a display screen of the vehicle, and request to perform the hardware replacement process.

The embodiment can help the user to determine the fault component and the fault handling scheme by prompting the user so as to handle the fault as soon as possible and enable the vehicle to resume normal driving.

In some embodiments, the step S201 may include:

The control method under the failure mode of the BSG motor provided by the embodiment can be suitable for a scene that after the preset failure state is reported by the BSG motor, a driver controls the vehicle to be powered off and then powered on again to try to start.

In some embodiments, receiving the first BSG motor status signal includes:

and receiving a first BSG motor state signal sent by the BSG controller.

The BSG controller is a controller of a BSG motor, and may be an MCU (Micro Controller Unit, microcontroller). The MCU can control the BSG motor, acquire corresponding signals of the BSG motor and send the signals to the HCU.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.

The following are device embodiments of the present application, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.

Fig. 3 is a schematic structural diagram of a control device in a BSG motor failure mode according to an embodiment of the present application, and for convenience of explanation, only a portion relevant to the embodiment of the present application is shown, which is described in detail below:

as shown in fig. 3, the control device 30 in the BSG motor failure mode is applied to a 48V mild hybrid vehicle, including: a receiving module 31 and a control module 32.

A receiving module 31, configured to receive a first BSG motor status signal when it is detected that the vehicle is powered on;

a control module 32 for controlling a relay of a 48V battery in the vehicle to maintain an off state if it is determined that the BSG motor of the vehicle is in a preset fault state based on the first BSG motor state signal;

In one possible implementation, the control module 32 is further configured to:

In one possible implementation, in the control module 32, controlling relay closure of the 48V battery includes:

In one possible implementation, the control module 32 is further configured to:

receiving a secondary BSG motor status signal after a relay controlling a 48V battery in the vehicle maintains an off state; if the BSG motor is still in the preset fault state based on the secondary BSG motor state signal, controlling a relay of the 48V battery to keep in an off state;

In one possible implementation, the control module 32 is further configured to:

after the relay controlling the 48V battery keeps on the off state, prompting the user that the BSG motor enters a non-response state and requesting hardware replacement processing;

In one possible implementation, the receiving module 31 is specifically configured to:

The present application also provides a computer program product having a program code which, when run in a corresponding processor, controller, computing means or control device, performs the steps in the control method embodiment described above in any of the BSG motor failure modes, such as S201 to S202 shown in fig. 2. Those skilled in the art will appreciate that the methods and apparatus presented in the embodiments of the present application may be implemented in various forms of hardware, software, firmware, special purpose processors, or a combination thereof. The special purpose processor may include an Application Specific Integrated Circuit (ASIC), a Reduced Instruction Set Computer (RISC), and/or a Field Programmable Gate Array (FPGA). The proposed method and device are preferably implemented as a combination of hardware and software. The software is preferably installed as an application program on a program storage device. Which is typically a machine based on a computer platform having hardware, such as one or more Central Processing Units (CPUs), random Access Memory (RAM), and one or more input/output (I/O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein may either be part of the application program or part of the application program which is executed by the operating system.

Fig. 4 is a schematic diagram of a control device provided in an embodiment of the present application. As shown in fig. 4, the control apparatus 4 of this embodiment includes: a processor 40 and a memory 41. The memory 41 is used for storing a computer program 42, and the processor 40 is used for calling and running the computer program 42 stored in the memory 41, and executing the steps in the control method embodiment in each BSG motor fault mode described above, for example, S201 to S202 shown in fig. 2. Alternatively, the processor 40 is configured to invoke and run the computer program 42 stored in the memory 41 to implement the functions of the modules/units in the above-described device embodiments, such as the functions of the modules/units 31 to 32 shown in fig. 3.

Illustratively, the computer program 42 may be partitioned into one or more modules/units that are stored in the memory 41 and executed by the processor 40 to complete/implement the schemes provided herein. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program 42 in the control device 4. For example, the computer program 42 may be split into the modules/units 31 to 32 shown in fig. 3.

The control device 4 may include, but is not limited to, a processor 40, a memory 41. It will be appreciated by those skilled in the art that fig. 4 is merely an example of the control device 4 and does not constitute a limitation of the control device 4, and may include more or less components than illustrated, or may combine certain components, or different components, e.g., the control device may also include an input-output device, a network access device, a bus, etc.

The processor 40 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 41 may be an internal storage unit of the control device 4, such as a hard disk or a memory of the control device 4. The memory 41 may also be an external storage device of the control device 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the control device 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the control device 4. The memory 41 is used for storing the computer program and other programs and data required by the control device. The memory 41 may also be used for temporarily storing data that has been output or is to be output.

Corresponding to the control device, the embodiment of the application also provides a vehicle, which comprises the control device. Wherein the vehicle may be a 48V mild hybrid vehicle.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/control device and method may be implemented in other manners. For example, the apparatus/control device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application implements all or part of the flow of the method of the foregoing embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of the control method embodiment in each BSG motor failure mode described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.

Furthermore, the features of the embodiments shown in the drawings or mentioned in the description of the present application are not necessarily to be construed as separate embodiments from each other. Rather, each feature described in one example of one embodiment may be combined with one or more other desired features from other embodiments, resulting in other embodiments not described in text or with reference to the drawings.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A control method in a BSG motor failure mode, which is applied to a 48V mild hybrid vehicle, comprising:

when the vehicle is detected to be electrified, receiving a first BSG motor state signal;

if the BSG motor of the vehicle is determined to be in a preset fault state based on the first BSG motor state signal, a relay of a 48V battery in the vehicle is controlled to be in an off state;

wherein, the relay of 48V battery is used for controlling 48V battery's output.

2. The method of claim 1, wherein after said receiving the first BSG motor status signal, the method further comprises:

and after the self-checking is successful, the BSG motor enters the ready-to-work state.

3. The method of claim 2, wherein the controlling the relay of the 48V battery to close comprises:

sending a closing control signal to the BMS of the 48V battery; the closing control signal is used to instruct the BMS of the 48V battery to control the relay of the 48V battery to be closed.

4. The control method in the BSG motor failure mode according to claim 1, wherein the BSG motor performs a first self-test when the vehicle is powered on, and transmits the first BSG motor status signal based on the first self-test result.

5. The control method in the BSG motor failure mode according to claim 1, further comprising, after the relay that controls the 48V battery in the vehicle is kept in an off state:

receiving a secondary BSG motor state signal;

if the BSG motor is still in the preset fault state based on the state signal of the secondary BSG motor, controlling a relay of the 48V battery to keep in a disconnected state;

and after the primary self-checking fails, the BSG motor performs secondary self-checking, and sends a state signal of the secondary BSG motor based on a secondary self-checking result.

6. The control method in the BSG motor failure mode according to claim 5, further comprising, after the relay controlling the 48V battery continues to maintain the off state:

and after the secondary self-checking fails, the BSG motor enters the non-response state.

7. The control method in the BSG motor failure mode according to any one of claims 1 to 6, wherein the receiving the first BSG motor status signal when the power-up of the vehicle is detected includes:

and when the BSG motor is in the preset fault state and the vehicle is detected to be powered down and then powered up again, receiving a first BSG motor state signal.

8. A control apparatus for a BSG motor failure mode, for use in a 48V mild hybrid vehicle, comprising:

the receiving module is used for receiving a first BSG motor state signal when the vehicle is detected to be electrified;

the control module is used for controlling a relay of a 48V battery in the vehicle to keep an off state if the BSG motor of the vehicle is determined to be in a preset fault state based on the first BSG motor state signal;

wherein, the relay of 48V battery is used for controlling 48V battery's output.

9. A vehicle comprising a control device comprising a memory for storing a computer program and a processor for calling and running the computer program stored in the memory to perform the control method in the BSG motor failure mode according to any one of claims 1 to 7.

10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the control method in BSG motor failure mode according to any one of claims 1 to 7.