Range extender control method, control device, vehicle and storage medium

Abstract

Embodiments of the present invention contemplate providing a range extender control method, control device, vehicle, and storage medium capable of ensuring driving safety. The control method includes: controlling the GCU to perform a self-test in response to a GCU startup command; controlling the GCU to enter torque mode based on the self-test results; obtaining GCU fault information, determining a corresponding fault level based on the fault information, and executing a fault handling strategy corresponding to the determined fault level, wherein at least one fault handling strategy includes controlling the power battery to drive the vehicle. The range extender control method in the embodiment of the present invention performs a self-test on the GCU to detect whether the GCU is faulty before the GCU begins generating electricity, thereby reducing the likelihood of further GCU faults after entering torque mode. This avoids the related art approach of solely powering down both the GM and the power battery to prevent further faults, thereby improving vehicle driving safety.

Description

Technical Field

[0001] The present invention relates to the field of vehicle engineering technology, and in particular to a control method, a control device, a vehicle, and a storage medium for a range extender. Background Art

[0002] In recent years, hybrid vehicles have become increasingly popular among consumers.

[0003] A REEV (Range Extended Electric Vehicle) is a hybrid electric vehicle (HEV) powered purely by electricity. It's primarily powered by a high-voltage battery. The engine, as part of the range extender, doesn't directly drive the vehicle, but rather powers a permanent magnet synchronous generator (PMSG). Therefore, the REEV's structure and powertrain performance are closer to those of pure electric vehicles than other hybrid vehicles, such as MHEVs (Mild Hybrid Electric Vehicles) and PHEVs (Plug-in Hybrid Electric Vehicles). After starting, the engine delivers power and torque within the optimal fuel economy zone, improving overall vehicle fuel efficiency.

[0004] The REEV relies on the power output of its own power battery to drive the drive motor to move, and the engine is not started at this time. When the power battery power drops to a certain level, under the control of the GCU (Generator Control Unit), the engine starts to drive the GM (Generator Motor) to generate electricity. The generated electricity directly contributes to the vehicle's propulsion. Any excess electricity can be stored in the power battery.

[0005] In related technologies, failures in the GM and GCU will cause the VCU (Vehicle Control Unit) to control the GM and power battery to lose power, making the vehicle unable to drive and seriously affecting driving safety. Summary of the Invention

[0006] In view of this, embodiments of the present invention are intended to provide a control method, a control device, a vehicle, and a storage medium for a range extender that can ensure driving safety.

[0007] To achieve the above-mentioned purpose, the technical solution of the embodiment of the present invention is implemented as follows:

[0008] An embodiment of the present invention provides a control method for a range extender, the control method comprising:

[0009] In response to a start-up instruction of the GCU, controlling the GCU to perform a self-test;

[0010] Controlling the GCU to enter a torque mode according to the obtained self-test result;

[0011] Acquire fault information of the GCU, determine a corresponding fault level according to the fault information, and execute a fault handling strategy corresponding to the determined fault level, wherein at least one of the fault handling strategies includes controlling a power battery to drive the vehicle.

[0012] In some embodiments, the self-test results obtained specifically include:

[0013] Information that a self-test result of at least one submodule in the GCU fails is obtained, and the GCU is controlled to be powered on and reset until self-test results of all submodules in the GCU pass.

[0014] In some embodiments, controlling the GCU to enter the torque mode according to the obtained self-test result specifically includes:

[0015] Information indicating that a self-test result of a motor temperature sensor in the GCU has failed is obtained, and the GCU is controlled to enter a limp home mode so that the output torque of the GM does not exceed a preset safety value.

[0016] In some embodiments, determining the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0017] According to the fault information, it is determined that the corresponding fault level is level 1, and the GCU is controlled to enter the limp home mode so that the output torque of the GM does not exceed a preset safety value.

[0018] In some embodiments, determining the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0019] According to the fault information, it is determined that the corresponding fault level is level 2, the GM is controlled to linearly reduce the output torque, the fault information is re-acquired, and the corresponding level 2 fault handling strategy is executed according to the acquisition result of the fault information.

[0020] In some embodiments, executing a corresponding level 2 fault handling strategy according to the acquisition result of the fault information specifically includes:

[0021] When the GM still outputs torque and the fault information is cleared, controlling the GCU to re-enter the torque mode;

[0022] When the output torque of the GM is 0 and the fault information still exists, the engine is controlled to stop, and the power battery is controlled to drive the vehicle.

[0023] In some embodiments, determining the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0024] According to the fault information, it is determined that the corresponding fault level is level 3, the engine is controlled to stop, and the power battery is controlled to drive the vehicle.

[0025] In some embodiments, determining the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0026] According to the fault information, it is determined that the corresponding fault level is level 4, and the vehicle is controlled to stop running.

[0027] In some embodiments, after executing the fault handling strategy corresponding to the determined fault level, the method further includes:

[0028] Controlling the GCU to power on and reset;

[0029] Controlling the GCU to re-execute self-test;

[0030] According to the obtained self-test result, the GCU is controlled to re-enter the torque mode.

[0031] An embodiment of the present invention further provides a control device for a range extender, the control device comprising:

[0032] The acquisition module is used to obtain the self-test results of the GCU after it performs self-test and obtain the fault information of the GCU in torque mode;

[0033] The determination module is used to determine the fault level corresponding to the fault information.

[0034] An embodiment of the present invention further provides a vehicle, comprising:

[0035] A power battery, used to output electrical energy to drive the vehicle;

[0036] a range extender, configured to generate electrical energy to charge the power battery, the range extender comprising a GCU, a GM, and an engine;

[0037] The control device described in the above embodiment.

[0038] An embodiment of the present invention further provides a storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the steps of the control method described in any one of the aforementioned embodiments.

[0039] The range extender control method in the embodiment of the present invention first performs a self-test on the GCU to check whether there is a GCU fault before the GCU starts generating electricity, thereby reducing the probability of further deterioration of the GCU fault after entering the torque mode. The fault information is classified into fault levels, and a targeted strategy is adopted based on the fault level to prevent the fault from continuing to deteriorate. This avoids the method of simply disconnecting both the GM and the power battery to prevent further faults in the related art, thereby improving vehicle driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 1 is a flow chart of a control method according to an embodiment of the present invention;

[0041] Figure 2 Schematic diagram of a control method according to another embodiment of the present invention;

[0042] Figure 3 FIG. 1 is a schematic diagram of a control device according to an embodiment of the present invention.

[0043] Description of Reference Numerals

[0044] Control device 10; acquisition module 11; determination module 12 DETAILED DESCRIPTION

[0045] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0046] The embodiment of the present invention provides a control method for a range extender, see Figure 1 , the control method includes:

[0047] S11: In response to the GCU startup instruction, control the GCU to perform a self-test.

[0048] The specific source of the GCU start command is not limited. For example, after a passenger starts the car, the VCU (Vehicle Control Unit) sends a start command to the GCU via the CAN (Controller Area Network). In another example, when the SOC (State of Charge) in the power battery falls below a preset threshold, the BMS (Battery Management System) sends this insufficient SOC information to the VCU via CAN. The VCU then sends a start command to the GCU, which uses the engine to drive the GM to charge the power battery.

[0049] The GCU performs self-tests to determine whether there is a fault in the GCU itself after startup, thereby improving driving safety.

[0050] S12: According to the obtained self-test result, the GCU is controlled to enter the torque mode.

[0051] It is understandable that the self-test result includes the detection of multiple parameter indicators.

[0052] The self-test result that satisfies the control of the GCU to enter the torque mode can be a self-test result in which all parameter indicators meet the self-test passing requirement; or it can be a self-test result in which some parameter indicators meet the self-test passing requirement, and the other parameter indicators that do not meet the self-test passing requirement do not affect driving safety.

[0053] Torque mode means that the engine delivers torque according to actual working conditions to drive the GM to generate electricity and charge the power battery.

[0054] S13: Acquire fault information of the GCU, determine a corresponding fault level according to the fault information, and execute a fault handling strategy corresponding to the determined fault level, wherein at least one fault handling strategy includes controlling the power battery to drive the vehicle.

[0055] The GCU may experience various types of faults while in torque mode. Potential GCU faults are pre-classified into multiple fault levels based on severity, and corresponding fault handling strategies are developed for each fault level. When a GCU fault occurs, the fault level corresponding to the fault information is queried and the corresponding fault handling strategy is implemented.

[0056] At least one fault handling strategy includes controlling the power battery to drive the vehicle, so as to avoid the situation in the prior art where, after a GCU failure, both the GM and the power battery are powered off, causing the vehicle to lose power. The vehicle can then continue to travel in a purely electric manner using the power stored in the power battery, thereby reducing the safety risks of the vehicle due to power loss during driving.

[0057] The range extender control method in the embodiment of the present invention first performs a self-test on the GCU to check whether there is a GCU fault before the GCU starts generating electricity, thereby reducing the probability of further deterioration of the GCU fault after entering the torque mode. The fault information is classified into fault levels, and a targeted strategy is adopted based on the fault level to prevent the fault from continuing to deteriorate. This avoids the method of simply disconnecting both the GM and the power battery to prevent further faults in the related art, thereby improving vehicle driving safety.

[0058] It is understandable that the GCU includes multiple submodules. The process of the GCU performing self-test is the process of at least some of the submodules in the GCU performing self-test items.

[0059] It is understandable that if the GCU self-test fails, measures need to be taken to eliminate the fault that caused the self-test failure.

[0060] In some embodiments, information that a self-test result of at least one submodule in the GCU fails is obtained, and the GCU is controlled to power on and reset until the self-test results of all submodules in the GCU pass.

[0061] Occasional factors such as ambient temperature and vehicle vibrations can cause GCU submodules to occasionally malfunction, leading to self-test failures. By controlling the GCU power-on reset, the GCU restarts, minimizing the impact of these occasional failures on the GCU self-test results.

[0062] It is understandable that the GCU power-on reset can be controlled multiple times continuously to eliminate occasional faults.

[0063] It is understandable that during the GCU power-on reset process, when the vehicle is in driving state, the power battery is controlled to drive the vehicle to continue driving to avoid adverse effects of power interruption on driving safety.

[0064] The GCU performs self-tests including CPU (Central Processing Unit) operating environment self-test, controller power self-test, current sensor self-test, controller temperature sensor self-test, motor temperature sensor self-test, and motor speed sensor self-test.

[0065] It should be noted that the specific implementation strategies of the above-mentioned inspection items and the specific hardware and software involved have been maturely applied in related technologies and will not be elaborated here.

[0066] In some embodiments, controlling the GCU to enter the torque mode according to the obtained self-test result specifically includes:

[0067] The system obtains information indicating that at least one of the following self-tests in the GCU (CPU operating environment, controller power supply, current sensor, controller temperature sensor, and motor speed sensor) has failed, and controls the GCU to power on and reset until the GCU self-test passes. This reduces the adverse effects of incidental factors on the self-test results of at least one of the following: the CPU operating environment, controller power supply, current sensor, controller temperature sensor, and motor speed sensor, allowing the GCU to enter torque mode normally.

[0068] In some embodiments, controlling the GCU to enter the torque mode according to the obtained self-test result specifically includes:

[0069] The information that the self-test result of the motor temperature sensor in the GCU fails is obtained, and the GCU is controlled to enter the limp home mode so that the output torque of the GM does not exceed the preset safety value.

[0070] In limp home mode, the GM's output torque does not exceed the preset safety value, and the GM's output power does not exceed the maximum limit value, thereby reducing the GM's power generation power and, in turn, reducing the GM's heat generation so that the GM can continue to work to charge the power battery.

[0071] It is understandable that in limp home mode, the output power of the power battery needs to be limited to increase the vehicle's mileage and reduce the probability of power interruption caused by power battery feeding due to intense driving.

[0072] It is understood that the number of fault levels divided according to the urgency of the fault information is not limited. For example, the fault information can be divided into levels 1 to 4 according to the urgency from mild to urgent.

[0073] In some embodiments, determining the corresponding fault level based on the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0074] According to the fault information, the corresponding fault level is determined to be level 1, and the GCU is controlled to enter limp home mode so that the output torque of the GM does not exceed the preset safety value.

[0075] When a fault with a fault level of 1 occurs, the fault handling strategy implemented is to control the engine to enter limp home mode to reduce the load on the GM and engine in the GCU, reduce the probability of further deterioration of the fault, and ensure a certain cruising range.

[0076] Level 1 fault information includes the following: Motor temperature sensor self-test failed. This means that when the GCU is in torque mode, the motor temperature sensor periodically performs self-tests at preset intervals. If the motor temperature exhibits abnormal changes, such as rapid rises and falls or oscillating fluctuations, while remaining within the normal range, the motor temperature sensor self-test fails. By controlling the GCU to enter limp home mode, the GM's heat generation is reduced, stabilizing the GM's temperature and enabling the GM to continue operating to charge the power battery.

[0077] In some embodiments, determining the corresponding fault level based on the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0078] According to the fault information, the corresponding fault level is determined to be level 2. The GM is controlled to linearly reduce the output torque, the fault information is re-acquired, and the corresponding level 2 fault handling strategy is executed based on the acquisition result of the fault information.

[0079] When a fault of level 2 occurs, the fault handling strategy executed is to control the GM to linearly reduce the output torque.

[0080] On the one hand, the abnormal vibration and noise caused by the sudden change of GM torque can be avoided by linearly reducing the GM output torque; on the other hand, the fault information can be re-acquired to determine the impact of reducing the GM output torque on the fault, so that a second-level fault handling strategy can be further adopted in the future.

[0081] Fault information for level 2 includes the following:

[0082] (1) The voltage of the controller power supply exceeds the preset voltage range. Specifically, the voltage of the controller power supply is higher than the preset voltage upper limit; the voltage of the controller power supply is lower than the preset voltage lower limit.

[0083] The controller power supply includes an onboard 12V (Voltage) lead-acid battery.

[0084] (2) The output voltage of the power battery is greater than the first output voltage limit.

[0085] (3) The current sensor feedback current is greater than the first current limit.

[0086] (4) The controller temperature sensor feedback controller temperature is greater than the first controller temperature limit.

[0087] (5) The motor temperature sensor feedback indicates that the motor temperature is greater than the first motor temperature limit.

[0088] (6) The motor speed sensor feedback indicates that the motor speed is greater than the first motor speed limit.

[0089] It is understood that under different road conditions, different driving modes, etc., the first output voltage limit, the first current limit, the first controller temperature limit, the first motor temperature limit, and the first motor speed limit all correspond to different values. This improves system safety redundancy under different operating conditions and avoids frequent triggering of fault information.

[0090] The specific values ​​of the first output voltage limit, the first current limit, the first controller temperature limit, the first motor temperature limit and the first motor speed limit under different states are pre-calculated by simulating the corresponding states through bench tests. The specific test process and the software and hardware equipment involved have been maturely applied in related technologies and will not be elaborated here.

[0091] It is understandable that whether the continuous decline in GM's output torque can affect the triggering conditions of the fault directly affects the specific measures of the subsequent Level 2 fault handling strategy.

[0092] In some embodiments, executing the corresponding level 2 fault handling strategy according to the result of acquiring the fault information specifically includes:

[0093] When the GM is still outputting torque and the fault is cleared, the GCU is controlled to re-enter the torque mode. That is, before the GM's output torque drops to 0, the fault is cleared due to the torque reduction, and the GCU's output torque increases again.

[0094] When the GM's output torque reaches zero and the fault message persists, the engine is shut down and the vehicle is driven by the power battery. Zero GM torque indicates that the GM has ceased generating electricity. Therefore, the engine is stopped to avoid unnecessary losses, and the remaining power in the power battery is transferred to the drive motor to propel the vehicle purely on electric power.

[0095] In some embodiments, determining the corresponding fault level based on the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0096] According to the fault information, the corresponding fault level is determined to be level 3, the engine is controlled to stop, and the power battery is controlled to drive the vehicle.

[0097] In the event of a Level 3 fault, the fault handling strategy is to shut down the engine and use the power battery to drive the vehicle. This shuts down the GM, completely eliminating load on the engine and GM and reducing the chance of further deterioration of the GCU fault. The remaining power in the power battery is then transferred to the drive motor to propel the vehicle purely on electric power, preventing power interruptions and improving driving safety.

[0098] Fault information of level 3 includes the following situations:

[0099] (1) The CPU operating environment fails.

[0100] (2) The output voltage of the power battery is greater than the second output voltage limit.

[0101] It can be understood that in an embodiment where a first output voltage limit is provided, the second output voltage limit is greater than the first output voltage limit.

[0102] (3) The current sensor feedback current is greater than the second current limit.

[0103] It can be understood that in an embodiment where a first current limit is provided, the second current limit is greater than the first current limit.

[0104] (4) The controller temperature sensor feedback controller temperature is greater than the second controller temperature limit.

[0105] It will be appreciated that in embodiments where a first controller temperature limit is provided, the second controller temperature limit is greater than the first controller temperature limit.

[0106] (5) The motor temperature sensor feedback motor temperature is greater than the second motor temperature limit.

[0107] It can be understood that in an embodiment where a first motor temperature limit is provided, the second motor temperature limit is greater than the first motor temperature limit.

[0108] (6) The motor speed sensor feedback indicates that the motor speed is greater than the second motor speed limit.

[0109] It can be understood that in an embodiment where a first motor speed limit is provided, the second motor speed limit is greater than the first motor speed limit.

[0110] It is understood that under different road conditions, different driving modes, etc., the second output voltage limit, the second current limit, the second controller temperature limit, the second motor temperature limit, and the second motor speed limit all correspond to different values. This improves system safety redundancy under different operating conditions and avoids frequent triggering of fault information.

[0111] The specific values ​​of the second output voltage limit, the second current limit, the second controller temperature limit, the second motor temperature limit and the second motor speed limit under different states are pre-calculated by simulating the corresponding states through bench tests. The specific test process and the software and hardware equipment involved have been maturely applied in related technologies and will not be elaborated here.

[0112] In some embodiments, determining the corresponding fault level based on the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes:

[0113] According to the fault information, the corresponding fault level is determined to be level 4, and the vehicle is controlled to stop running. That is, when a fault level of level 4 occurs, the fault handling strategy executed is to control the vehicle to stop running.

[0114] By stopping the vehicle, the range extender stops working and the power battery is also powered off and stops working, preventing the GCU failure from further affecting the operation of the power battery, thereby ensuring the safety of the vehicle and reducing the chance of further deterioration of the failure.

[0115] The fault information included in the fault level 4 includes: a short circuit fault of an IGBT (Insulated Gate Bipolar Transistor).

[0116] It is understandable that after a fault occurs at any level, the GCU sends the fault information to the VCU via CAN, and the VCU

[0117] In some embodiments, after executing the fault handling strategy corresponding to the determined fault level, the method further includes:

[0118] Control GCU power-on reset;

[0119] Control GCU to re-execute self-test;

[0120] Based on the self-test results obtained, the GCU is controlled to re-enter the torque mode.

[0121] Power-on reset can help eliminate the impact of occasional faults on the normal operation of the GCU in torque mode; by re-performing self-test, it can be confirmed whether the occasional fault has been eliminated; after the fault is eliminated, the GCU re-enters the torque mode and realizes the normal operation of the GCU.

[0122] The following is a specific embodiment to illustrate a control method of the range extender in the embodiment of the present invention. Figure 2 , the control method comprises the following steps:

[0123] S201: Responding to the start instruction of the GCU.

[0124] S202: Control the CPU operating environment, controller power supply, current sensor, controller temperature sensor, motor temperature sensor and motor speed sensor to perform self-test.

[0125] S203: Determine if the self-tests of the CPU operating environment, controller power supply, current sensor, controller temperature sensor, and motor speed sensor have passed. If so, proceed to step 204; if not, proceed to step 213.

[0126] S204: Determine whether the motor temperature sensor self-test has passed. If so, proceed to step 206; if not, proceed to step 205.

[0127] S205: Control the GCU to enter the limp home mode.

[0128] S206: Control the GCU to enter the torque mode. In the torque mode, it is necessary to continuously monitor whether the GCU generates fault information.

[0129] S207: Obtain GCU fault information and determine the corresponding fault level. If the fault level is determined to be level 1, execute step 208; if the fault level is determined to be level 2, execute step 209; if the fault level is determined to be level 3, execute step 211; if the fault level is determined to be level 4, execute step 212.

[0130] S208: Control the GCU to enter the limp home mode.

[0131] S209: Control the GCU to linearly reduce the output torque and re-acquire the fault information.

[0132] S210: Determine whether the output torque has dropped to 0 and the fault information still exists. If so, execute step 211; if not, execute step 206.

[0133] S211: Control the engine to stop and control the power battery to drive the vehicle. After completing step S211, execute step 213.

[0134] S212: Control the vehicle to stop running. After completing step S212, execute step 213.

[0135] S213: Control the GCU to power on and reset.

[0136] The embodiment of the present invention further provides a control device 10 for a range extender, see Figure 3 The control device 10 includes an acquisition module 11 and a determination module 12, wherein the acquisition module 11 is used to obtain the self-test result after the GCU performs self-test and obtain the fault information of the GCU in the torque mode; the determination module 12 is used to determine the fault level corresponding to the fault information.

[0137] An embodiment of the present invention further provides a vehicle comprising a power battery, a range extender, and the control device 10 described in the aforementioned embodiment. The power battery is configured to output electrical energy to drive the vehicle; the range extender is configured to generate electrical energy to charge the power battery. The range extender comprises a GCU, a GM, and an engine. When the range extender is not operating, the power battery can use the stored energy to drive the vehicle in a purely electric manner.

[0138] It should be noted that, in the embodiment of the present invention, if the control method of the range extender described above is implemented in the form of a software function module and is sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods of each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiment of the present invention is not limited to any specific combination of hardware and software.

[0139] Correspondingly, an embodiment of the present invention further provides a storage medium on which a computer program is stored, characterized in that when the computer program is executed, the steps of any one of the control methods in the aforementioned embodiments are implemented.

[0140] Correspondingly, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements the steps in the above method when executing the program.

[0141] Those skilled in the art will understand that all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, and other media that can store program codes.

[0142] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods of each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0143] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction.

[0144] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A control method for a range extender, characterized in that: The control method includes: In response to a start-up instruction of the GCU, controlling the GCU to perform a self-test; Controlling the GCU to enter a torque mode according to the obtained self-test result; Obtaining fault information of the GCU, determining a corresponding fault level based on the fault information, and executing a fault handling strategy corresponding to the determined fault level, wherein at least one of the fault handling strategies includes controlling a power battery to drive the vehicle; The step of controlling the GCU to enter the torque mode according to the obtained self-test result specifically includes: Information indicating that a self-test result of a motor temperature sensor in the GCU has failed is obtained, and the GCU is controlled to enter a limp home mode so that the GM output torque does not exceed a preset safety value and the GM output power does not exceed a maximum limit value, and the output power of the power battery is limited.

2. The control method according to claim 1, characterized in that: The self-test results obtained specifically include: Information that a self-test result of at least one submodule in the GCU fails is obtained, and the GCU is controlled to be powered on and reset until self-test results of all submodules in the GCU pass.

3. The control method according to claim 1, wherein: The determining of the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes: According to the fault information, it is determined that the corresponding fault level is level 1, and the GCU is controlled to enter the limp home mode so that the output torque of the GM does not exceed a preset safety value.

4. The control method according to claim 1, wherein: The determining of the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes: According to the fault information, it is determined that the corresponding fault level is level 2, the GM is controlled to linearly reduce the output torque, the fault information is re-acquired, and the corresponding level 2 fault handling strategy is executed according to the acquisition result of the fault information.

5. The control method according to claim 4, characterized in that: The execution of the corresponding Level 2 fault handling strategy according to the acquisition result of the fault information specifically includes: When the GM still outputs torque and the fault information is cleared, controlling the GCU to re-enter the torque mode; When the output torque of the GM is 0 and the fault information still exists, the engine is controlled to stop, and the power battery is controlled to drive the vehicle.

6. The control method according to claim 1, characterized in that: The determining of the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes: According to the fault information, it is determined that the corresponding fault level is level 3, the engine is controlled to stop, and the power battery is controlled to drive the vehicle.

7. The control method according to claim 1, characterized in that: The determining of the corresponding fault level according to the fault information and executing the fault handling strategy corresponding to the determined fault level specifically includes: According to the fault information, it is determined that the corresponding fault level is level 4, and the vehicle is controlled to stop running.

8. The control method according to claim 1, characterized in that: After executing the fault handling strategy corresponding to the determined fault level, the method further includes: Controlling the GCU to power on and reset; Controlling the GCU to re-execute self-test; According to the obtained self-test result, the GCU is controlled to re-enter the torque mode.

9. A control device for a range extender, configured to execute the control method according to any one of claims 1 to 8, characterized in that: include: The acquisition module is used to obtain the self-test results of the GCU after it performs self-test and obtain the fault information of the GCU in torque mode; The determination module is used to determine the fault level corresponding to the fault information.

10. A vehicle, characterized in that: include: A power battery, used to output electrical energy to drive the vehicle; a range extender, configured to generate electrical energy to charge the power battery, the range extender comprising a GCU, a GM, and an engine; The control device according to claim 9.

11. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the steps of the control method according to any one of claims 1 to 8 are implemented.

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