Vehicle control system and method, vehicle, storage medium and program product

Abstract

The invention relates to a vehicle control system and method, a vehicle, a storage medium and a program product. The system comprises a low-voltage battery, a high-voltage battery, a vehicle control unit, and a bidirectional voltage converter, a motor assembly and an engine which are respectively connected with the vehicle control unit, wherein one end of the bidirectional voltage converter is connected with the low-voltage battery, the other end of the bidirectional voltage converter is connected with the motor assembly and the high-voltage battery, and the motor assembly is further connected with the engine; and the vehicle control unit is configured to control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter under the condition that the state of the high-voltage battery is abnormal, so that the motor assembly drives the engine to start. Thus, even if the state of the high-voltage battery is abnormal, the engine of the vehicle can be normally started.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle control, and in particular, to a vehicle control system, method, vehicle, storage medium, and program product. Background Art

[0002] An extended-range electric vehicle (REV) is an electric vehicle with a dual power system. It is equipped with not only an electric motor and a battery, but also an engine, which can drive the electric motor to generate electricity to provide power and additional power for the battery pack.

[0003] If the engine of the extended-range electric vehicle fails to start normally, it will inevitably affect the normal use of the vehicle. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a vehicle control system, method, vehicle, storage medium, and program product.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a vehicle control system, including: A low-voltage battery, a high-voltage battery, a vehicle controller, and a bidirectional voltage converter, a motor assembly, and an engine respectively connected to the vehicle controller; wherein one end of the bidirectional voltage converter is connected to the low-voltage battery, the other end of the bidirectional voltage converter is connected to the motor assembly and the high-voltage battery, and the motor assembly is further connected to the engine; The vehicle controller is configured to, when the high-voltage battery is in an abnormal state, control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter, so as to drive the engine to start through the motor assembly.

[0006] Optionally, the vehicle controller is configured to, when the high-voltage battery is in an abnormal state, control the bidirectional voltage converter to enter a first working mode, and the first working mode is a low-voltage to high-voltage mode, so as to convert the output voltage of the low-voltage battery into the required voltage of the motor assembly through the bidirectional voltage converter and then supply power to the motor assembly.

[0007] Optionally, the vehicle controller is further configured to, after the engine starts, control the motor assembly to be in an idling and non-power generation state within a preset duration starting from a preset moment, and the preset moment includes the moment when the engine ignition is successful.

[0008] Optionally, the system further includes: a switching device, and the switching device is connected between the bidirectional voltage converter and the high-voltage battery; The vehicle controller is further configured to control the switching device to disconnect in the case of an abnormal state of the high-voltage battery, and after the switching device disconnects, control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter.

[0009] Optionally, the abnormal state of the high-voltage battery includes a first abnormal state; The vehicle controller is further configured to, in the case of the high-voltage battery being in the first abnormal state, in response to receiving a notification message of successful engine ignition, control the motor assembly and the engine to enter a power generation mode.

[0010] Optionally, the first abnormal state includes at least one of the following: The power of the high-voltage battery is less than or equal to a preset power threshold; The battery temperature of the high-voltage battery is less than or equal to a preset temperature threshold.

[0011] Optionally, the vehicle controller is further configured to control the motor assembly and the engine to enter a power generation mode in the following manner: Control the bidirectional voltage converter to enter a second working mode, and the second working mode is a high-voltage to low-voltage mode; Control the switching device to close; Control the motor assembly to charge the high-voltage battery and / or perform heating control on the high-voltage battery.

[0012] Optionally, the system further includes a drive motor connected to the voltage output terminal of the motor assembly, and the abnormal state of the high-voltage battery includes a second abnormal state; The vehicle controller is further configured to, in the case of the high-voltage battery being in the second abnormal state, in response to receiving a notification message of successful engine ignition, control the power generation power of the motor assembly according to the required power of the drive motor, so as to supply power to the drive motor through the motor assembly, and the drive motor is used to drive the vehicle to travel in a preset limp mode.

[0013] Optionally, the system further includes a preset electrical device connected to the voltage output terminal of the motor assembly, and the preset electrical device is connected in parallel with the drive motor; The vehicle controller is further configured to control the preset electrical device to turn on, and the preset electrical device is used to absorb a target difference in electricity, and the target difference in electricity is the difference between the power generation amount of the motor assembly and the electricity consumption of the drive motor.

[0014] Optionally, the vehicle controller is further configured to control the bidirectional voltage converter to enter a second working mode, and the second working mode is a high-voltage to low-voltage mode.

[0015] Optionally, the second abnormal state includes that the high-voltage battery is in a preset fault state.

[0016] According to a second aspect of the embodiments of the present disclosure, there is provided a vehicle control method, which is applied to a vehicle control system. The system includes a low-voltage battery, a high-voltage battery, a vehicle controller, and a bidirectional voltage converter, a motor assembly, and an engine that are respectively connected to the vehicle controller; wherein, one end of the bidirectional voltage converter is connected to the low-voltage battery, the other end of the bidirectional voltage converter is connected to the motor assembly, and the motor assembly is further connected to the engine; The method includes: When the state of the high-voltage battery is abnormal, the vehicle controller controls the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter, so as to drive the engine to start through the motor assembly.

[0017] According to a third aspect of the embodiments of the present disclosure, there is provided a vehicle, including the vehicle control system described in the first aspect of the present disclosure.

[0018] According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, on which computer program instructions are stored, and when the program instructions are executed by a processor, the steps of the vehicle control method provided in the second aspect of the present disclosure are implemented.

[0019] According to a fifth aspect of the embodiments of the present disclosure, there is provided a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the vehicle control method provided in the second aspect of the present disclosure are implemented.

[0020] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: The vehicle controller can be configured to control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter when the state of the high-voltage battery is abnormal, so as to drive the engine to start through the motor assembly. In this way, even if the state of the high-voltage battery is abnormal, the motor assembly can drive the engine to start, improving the safety of vehicle driving and also expanding the usage scenarios of range-extended vehicles.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0023] Figure 1It is a block diagram of a vehicle control system shown according to an exemplary embodiment.

[0024] Figure 2 It is according to Figure 1 A block diagram of a vehicle control system shown according to the illustrated embodiment.

[0025] Figure 3 It is according to Figure 2 A schematic diagram of the circuit connection of a vehicle control system shown according to the illustrated embodiment.

[0026] Figure 4 It is according to Figure 2 A block diagram of a vehicle control system shown according to the illustrated embodiment.

[0027] Figure 5 It is a flowchart of a vehicle control method shown according to an exemplary embodiment.

[0028] Figure 6 It is according to Figure 5 A flowchart of a vehicle control method shown according to the illustrated embodiment.

[0029] Figure 7 It is a block diagram of a vehicle shown according to an exemplary embodiment. Detailed implementation manners

[0030] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0031] It should be noted that all actions of obtaining signals, information, or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where the location is located and obtaining the authorization given by the owner of the corresponding device.

[0032] The present disclosure is mainly applied to the engine starting control scenario of range-extended vehicles. The range extender system of a range-extended electric vehicle includes an engine, a generator, a speed increasing gearbox, a motor controller, etc. Usually, the engine is started by the generator dragging the engine in reverse. The starting energy of the engine mainly comes from the high-voltage power battery pack. That is, after the high-voltage power battery pack supplies power to the generator, the generator drives the engine to start. However, if the electric energy of the power battery pack is exhausted, the battery level is low, or the temperature of the power battery pack is too low, the power battery pack cannot discharge power; in addition, if the power battery pack fails, it cannot supply electrical energy to the generator, thus making the engine unable to start normally and affecting the normal use of the vehicle.

[0033] To solve the above existing problems, the present disclosure provides a vehicle control system, method, vehicle, storage medium and program product. The following will describe the specific embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0034] Figure 1 is a structural block diagram of a vehicle control system shown according to an exemplary embodiment, as Figure 1 shown. The system 100 includes: A low-voltage battery 101, a high-voltage battery 102, a vehicle controller 103, and a bidirectional voltage converter 104, a motor assembly 105, and an engine 106 that are respectively connected to the vehicle controller 103; wherein, one end of the bidirectional voltage converter 104 is connected to the low-voltage battery 101, the other end of the bidirectional voltage converter 104 is connected to the motor assembly 105 and the high-voltage battery 102, and the motor assembly 105 is also connected to the engine 106.

[0035] Among them, the low-voltage battery 101 may include, for example, a 12V storage battery, the high-voltage battery 102 may include the high-voltage power battery pack of the vehicle, the vehicle controller is the VCU (Vehicle Control Unit), the bidirectional voltage converter 104 may include a bidirectional DC / DC, and the motor assembly 105 may include a motor controller and a motor.

[0036] The vehicle controller 103 may be configured to, when the state of the high-voltage battery 102 is abnormal, control the low-voltage battery 101 to supply power to the motor assembly 105 through the bidirectional voltage converter 104, so as to drive the engine 106 to start through the motor assembly 105.

[0037] Here, if the state of the high-voltage battery 102 is abnormal, it means that the high-voltage battery 102 cannot supply power to the motor assembly 105. In this working condition, in order to control the engine 106 to start normally, the low-voltage battery 101 can be used as the power supply for the motor assembly 105.

[0038] The bidirectional voltage converter 104 may include, for example, a bidirectional DC / DC. It can be understood that, compared with a unidirectional DC / DC, the bidirectional DC / DC can achieve bidirectional voltage conversion. For example, through the bidirectional DC / DC, high voltage can be converted into low voltage, or through the bidirectional DC / DC, low voltage can be converted into high voltage.

[0039] In the vehicle control system in the related art, a unidirectional DC / DC is used to convert the high-voltage electrical energy output by the high-voltage power battery pack or the motor assembly into low-voltage electrical energy through the unidirectional DC / DC and supply it to the low-voltage devices of the vehicle (such as a 12V battery). Since the unidirectional DC / DC can only convert high voltage into low voltage, when the high-voltage power battery pack is in an abnormal state, reverse voltage conversion cannot be achieved through the unidirectional DC / DC, and the high-voltage power battery pack in an abnormal state cannot supply electrical energy to the motor assembly, resulting in the problem that the engine cannot start.

[0040] In the present disclosure, the bidirectional DC / DC is used to replace the unidirectional DC / DC. In this way, when the high-voltage battery 102 is in an abnormal state, the low-voltage signal of the low-voltage battery connected to one end of the bidirectional DC / DC can be converted into a high-voltage signal through the bidirectional DC / DC to supply power to the motor assembly 105, so that the engine can be started by driving the motor assembly 105.

[0041] That is to say, the bidirectional voltage converter 104 includes two working modes: a first working mode and a second working mode. Among them, the first working mode refers to the mode of converting low voltage to high voltage, and the second working mode refers to the mode of converting high voltage to low voltage. When the high-voltage battery 102 is in a normal state, the bidirectional voltage converter 104 can be controlled to be in the second working mode. In the second working mode, the bidirectional voltage converter 104 can convert the high-voltage electrical energy output by the high-voltage battery 102 or the motor assembly 105 into low-voltage electrical energy and supply it to the low-voltage battery 101 of the vehicle. When the high-voltage battery 102 is in an abnormal state, the bidirectional voltage converter 104 can be controlled to be in the first working mode, so that after the output voltage of the low-voltage battery 101 is converted into the required voltage of the motor assembly 105 through the bidirectional voltage converter 104, the motor assembly 105 is supplied with power, and the powered motor assembly 105 can drive the engine 106 to start.

[0042] Therefore, in the present disclosure, the vehicle controller 103 can be configured to control the bidirectional voltage converter 104 to enter the first working mode when the high-voltage battery 102 is in an abnormal state, so that after the output voltage of the low-voltage battery 101 is converted into the required voltage of the motor assembly 105 through the bidirectional voltage converter 104, the motor assembly 105 is supplied with power.

[0043] Among them, after the vehicle controller 103 can perform data communication with the vehicle's BMS (Battery Management System), it can determine whether the state of the high-voltage battery 102 is abnormal.

[0044] With the above system, the vehicle controller can be configured to, when the state of the high-voltage battery is abnormal, control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter, so as to drive the engine to start through the motor assembly. In this way, even if the state of the high-voltage battery is abnormal, the motor assembly can still drive the engine to start, improving the driving safety of the vehicle and also expanding the usage scenarios of the range-extended vehicle.

[0045] Figure 2 is based on Figure 1 The structural block diagram of a vehicle control system shown in the illustrated embodiment is as Figure 2 shown. The system 100 further includes a switching device 107, and the switching device 107 is connected between the bidirectional voltage converter 104 and the high-voltage battery 102.

[0046] In this way, the vehicle controller 103 can also be configured to, when the state of the high-voltage battery 102 is abnormal, control the switching device 107 to disconnect, and after the switching device 107 disconnects, control the low-voltage battery 101 to supply power to the motor assembly 105 through the bidirectional voltage converter 104.

[0047] Exemplarily, Figure 3 is based on Figure 2 The schematic circuit connection diagram of a vehicle control system shown in the illustrated embodiment is as Figure 3 shown. The low-voltage battery 101 uses a 12V storage battery, the high-voltage battery 102 is a high-voltage power battery, the bidirectional voltage converter 104 uses a bidirectional DC / DC, and the motor assembly 105 includes Figure 3 the motor controller and the motor in Figure 3 shown. The switching device 107 can be, for example,

[0048] The vehicle controller 103 can determine whether the vehicle state and the state of the high-voltage power battery are both normal according to the state of the vehicle and the high-voltage power battery. Under normal circumstances, it controls the vehicle to enter the normal start mode. In this normal start mode, as Figure 3As shown, the vehicle controller 103 can control the bidirectional DC / DC to be in the second working mode of high-voltage to low-voltage, and control the high-voltage relay to close, so as to provide electrical energy source for the motor through the high-voltage power battery. The vehicle controller 103 also sends control commands to the motor controller and the engine controller respectively to control the motor to drive the engine to start, and the vehicle enters the normal working state. When the vehicle controller 103 determines that the state of the high-voltage power battery is abnormal, it can control the high-voltage relay to open, so as to isolate the high-voltage power battery from the high-voltage system and prevent the voltage after the next bidirectional DC / DC pump-up from directly charging the high-voltage power battery. When it is determined that the high-voltage power battery fails, by timely controlling the high-voltage relay to open, it can also prevent the high-voltage electricity from further damaging the power battery when the motor generates electricity. After controlling the high-voltage relay to open, the vehicle controller 103 can control the working mode of the bidirectional DC / DC as shown in Figure 3 to switch from the second working mode to the first working mode (that is, control the bidirectional DC / DC to enter the first working mode of low-voltage to high-voltage). In this way, through the bidirectional DC / DC, the 12V voltage output by the 12V battery can be pumped up to the required voltage of the motor (usually higher than 12V) and then provide electrical energy source for the motor. The above examples are only for illustration, and the present disclosure does not limit this.

[0049] In another possible embodiment of the present disclosure, the vehicle controller 103 can also be configured to control the motor assembly 105 to be in an idling non-power generation state within a preset duration starting from a preset moment after the engine 106 starts, and the preset moment includes the moment when the engine 106 ignites successfully.

[0050] After the present disclosure controls the low-voltage battery 101 to supply power to the motor assembly 105, the motor assembly 105 can drive the engine 106 to start rotating. When the speed of the engine 106 reaches the preset speed (such as 1000 revolutions per minute), fuel injection and ignition are carried out. After the ignition is successful, the engine will drive the motor to generate electricity in turn, so as to provide electrical energy for the drive motor of the vehicle and other electrical devices (such as air-conditioning compressors, PTC heating devices, etc.), and can also charge the high-voltage power battery. However, it can be understood that before controlling the motor to output electrical energy outward, it is necessary to first control the working mode of the bidirectional voltage converter 104 to enter the second working mode of high-voltage to low-voltage, so as to prevent the low-voltage battery from discharging, and it is also necessary to control as shown in Figure 3The shown high-voltage relay closes, thereby preparing to charge the high-voltage battery or heat it. Therefore, in order to avoid the adverse impact on the circuit caused by the electric energy output by the motor for power generation when the operating mode of the bidirectional voltage converter 104 has not been switched or the high-voltage relay has not been closed, the vehicle controller 103 can control the engine 106 to be in an idling state without power generation for a preset duration starting from a preset moment after the engine 106 starts. The preset moment includes the moment when the engine ignition is successful. For example, it can be controlled that starting from the moment of successful ignition, the motor assembly 105 is in an idling state without power generation within the next 5 seconds (an example of a preset duration, which can also be 8 seconds, 10 seconds, etc.). In this state, the output current of the motor assembly 105 is 0.

[0051] It should also be noted that in the present disclosure, the abnormal state of the high-voltage battery 102 can include a first abnormal state or a second abnormal state. Among them, the first abnormal state includes: the power of the high-voltage battery 102 is less than or equal to a preset power threshold, and / or the battery temperature of the high-voltage battery 102 is less than or equal to a preset temperature threshold. The second abnormal state includes that the high-voltage battery 102 is in a preset fault state.

[0052] It can be understood that if the current power of the high-voltage battery 102 is low or the battery temperature of the high-voltage battery 102 is low, the high-voltage battery cannot provide the required power for the motor assembly 105, and the motor assembly 105 cannot drive the engine to start, thus affecting the normal use of the vehicle. Similarly, when the high-voltage battery 102 is in a fault state, it cannot drive the engine to start. In the present disclosure, different control strategies can be adopted for vehicle control according to different states of the high-voltage battery.

[0053] In the present disclosure, when the state of the high-voltage battery is abnormal, after controlling the low-voltage battery 101 to provide electric energy for the motor assembly 105 through the bidirectional voltage converter 104, the motor assembly 105 can drive the engine 106 to start. As described above, after controlling the engine 106 to start, the engine starts fuel injection and ignition, and can drive the motor assembly 105 to generate electricity outward after successful ignition.

[0054] When the high-voltage battery 102 is in the first abnormal state, the power of the high-voltage battery 102 is too low or the battery temperature of the high-voltage battery 102 is low. In order to cope with this abnormal situation of the high-voltage battery 102 and enable the extended-range vehicle to enter a normal working mode after the engine 106 starts, the present disclosure can control the motor assembly 105 that generates electricity outward to charge the high-voltage battery 102 or heat the high-voltage battery 102, so that the high-voltage battery 102 can provide electric energy for vehicle operation subsequently.

[0055] Therefore, in another embodiment of the present disclosure, the vehicle controller 103 may further be configured to, when the high-voltage battery 102 is in the first abnormal state, in response to receiving a notification message that the engine 106 has been successfully ignited, control the motor assembly 105 and the engine 106 to enter a power generation mode.

[0056] The vehicle controller 103 can control the motor assembly 105 and the engine 106 to enter the power generation mode through the following steps: control the bidirectional voltage converter 104 to enter the second working mode, and the second working mode is a high-voltage to low-voltage mode; control the switching device 107 to close; control the motor assembly 105 to charge the high-voltage battery 102 and / or perform heating control on the high-voltage battery 102.

[0057] Exemplarily, as Figure 3 shown, the vehicle controller 103 can control the working mode of the bidirectional DC / DC as Figure 3 shown to switch from the first working mode to the second working mode (i.e., control the bidirectional DC / DC to enter the second working mode of high-voltage to low-voltage) to prevent the 12V battery from feeding, and control the high-voltage relay to close to prepare for charging or heating the high-voltage power battery. For example, if the high-voltage power battery is in a state of power feeding, the motor can be controlled to generate electricity to charge the high-voltage power battery to a set level; if the temperature of the high-voltage power battery is low, the PTC heating device can be started to heat the high-voltage power battery to a set level. In this way, when it is determined that the power of the high-voltage power battery is higher than the preset power threshold or the battery temperature is higher than the preset temperature threshold, the high-voltage power battery can be used as the power source of the vehicle to control the vehicle.

[0058] As described above, the abnormal state of the high-voltage battery further includes a second abnormal state, and the second abnormal state refers to the high-voltage battery being in a preset fault state. The preset fault state may include one or more types of faults set in advance. For example, it can be determined whether the high-voltage battery is in the preset fault state according to the status code of the high-voltage battery reported by the BMS.

[0059] Figure 4 is according to Figure 2 shown in the embodiment shown, as Figure 4 shown, the system 100 further includes a drive motor 108 connected to the voltage output terminal of the motor assembly 105. In this way, the vehicle controller 103 may further be configured to, when the high-voltage battery 102 is in the second abnormal state, in response to receiving a notification message that the engine 106 has been successfully ignited, control the power generation power of the motor assembly 105 according to the required power of the drive motor 108, so as to supply power to the drive motor 108 through the motor assembly 105, and the drive motor 108 is used to drive the vehicle to travel in a preset limp mode.

[0060] That is to say, when it is determined that the high-voltage battery 102 is in the second abnormal state, that is, it is determined that the high-voltage battery 102 fails, it is usually impossible to control the vehicle to continue normal driving, and the vehicle needs to be repaired. Therefore, in view of this working condition, the present disclosure can control the vehicle to safely drive to a preset repair location based on the preset limp-home mode, thereby realizing the "limp-home" function of the vehicle and improving the user experience.

[0061] Specifically, when the vehicle controller 103 determines that the high-voltage battery 102 is in the second abnormal state, in response to receiving a notification message that the engine 106 has been successfully ignited, the engine 106 can drive the motor to rotate to realize the power generation function of the motor assembly 105 (i.e., enter the power generation mode). In the case of a high-voltage battery failure, the drive motor on the vehicle can be used to drive the vehicle, and the drive motor can be supplied with electrical energy after being generated by the motor assembly 105. For this purpose, the vehicle controller 103 can control the motor assembly 105 to generate the same power according to the required power of the drive motor 108 to meet the power consumption requirements of the drive motor 108 and control the vehicle to limp to the preset repair point.

[0062] In addition, when it is determined that the high-voltage battery 102 is in a preset fault state, after the engine is controlled to start, in order to prevent the low-voltage battery 101 from discharging, the vehicle controller 103 also needs to be configured to control the bidirectional voltage converter 104 to enter the second working mode, and the second working mode is a high-voltage-to-low-voltage mode.

[0063] As Figure 4 shown, the system 100 further includes a preset electrical device 109 connected to the voltage output terminal of the motor assembly 105, and the preset electrical device 109 is connected in parallel with the drive motor 108. In this way, the vehicle controller 103 is further configured to control the preset electrical device 109 to be turned on, and the preset electrical device is used to absorb the target difference in electricity, and the target difference in electricity is the difference between the power generation amount of the motor assembly and the power consumption amount of the drive motor.

[0064] In the present disclosure, in the state where the high-voltage battery 102 fails (i.e., the second abnormal state), the electrical energy generated by the motor assembly 105 is mainly used to supply the drive motor 108 to drive the vehicle. However, if the output power of the motor assembly 105 during power generation is higher than the required power of the drive motor 108, in order to protect the circuit, the present disclosure can use the preset electrical device 109 to absorb the target difference in electricity. Among them, the preset electrical device 109 can include, for example, an air-conditioning compressor, a PTC heating device, etc.

[0065] With the above system, when it is determined that the power of the high-voltage battery is low or the high-voltage battery is severely cold and unable to output power externally, the engine can still start normally. After starting, it can complete the charging or heating of the high-voltage battery, thereby controlling the vehicle to enter the normal working mode. When it is determined that the high-voltage battery fails, after controlling the engine to start, it drives the motor assembly to generate electricity. After supplying power to the drive motor, the vehicle is driven by the drive motor to ensure that the vehicle can safely drive to the repair point, realizing the limp-home function.

[0066] Figure 5 is a flowchart of a vehicle control method shown according to an exemplary embodiment. This method can be applied to a vehicle control system 100 as Figure 1 shown. The system includes: a low-voltage battery, a high-voltage battery, a vehicle controller, and a bidirectional voltage converter, a motor assembly, and an engine respectively connected to the vehicle controller; wherein, one end of the bidirectional voltage converter is connected to the low-voltage battery, the other end of the bidirectional voltage converter is connected to the motor assembly, and the motor assembly is also connected to the engine; as Figure 5 shown, this method includes the following steps: In step S501, when the state of the high-voltage battery is abnormal, the vehicle controller controls the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter, so as to drive the engine to start through the motor assembly.

[0067] During the execution of this step, when the state of the high-voltage battery is abnormal, the vehicle controller can control the bidirectional voltage converter to enter the first working mode. The first working mode is the mode of converting low voltage to high voltage, so as to convert the output voltage of the low-voltage battery into the required voltage of the motor assembly through the bidirectional voltage converter and then supply power to the motor assembly.

[0068] As Figure 2 shown, the system 100 further includes a switching device, and the switching device is connected between the bidirectional voltage converter and the high-voltage battery; thus, during the execution of this step, when the state of the high-voltage battery is abnormal, the vehicle controller can control the switching device to disconnect, and after the switching device disconnects, control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter.

[0069] Figure 6 is a flowchart of a vehicle control method shown according to Figure 5 the shown embodiment. As Figure 6 shown, this method further includes the following steps: In step S502, after the engine starts, the vehicle controller controls the motor assembly to be in an idle non-power generation state within a preset duration starting from a preset moment. The preset moment includes the moment when the engine ignition is successful.

[0070] In addition, the abnormal states of the high-voltage battery include a first abnormal state; wherein, the first abnormal state includes at least one of the following: the power of the high-voltage battery is less than or equal to a preset power threshold; the battery temperature of the high-voltage battery is less than or equal to a preset temperature threshold.

[0071] As Figure 6 shown, the method further includes the following steps: In step S503, when the high-voltage battery is in the first abnormal state, in response to receiving a notification message that the engine ignition is successful, the vehicle control unit controls the motor assembly and the engine to enter the power generation mode.

[0072] During the execution of this step, the bidirectional voltage converter can be controlled to enter a second working mode, and the second working mode is a high-voltage to low-voltage mode; the switching device is controlled to close; the motor assembly is controlled to charge the high-voltage battery and / or perform heating control on the high-voltage battery.

[0073] As Figure 4 shown, the system further includes a drive motor connected to the voltage output terminal of the motor assembly, and a preset electrical device connected to the voltage output terminal of the motor assembly. The preset electrical device is connected in parallel with the drive motor; the abnormal states of the high-voltage battery include a second abnormal state; the second abnormal state includes that the high-voltage battery is in a preset fault state.

[0074] As Figure 6 shown, the method further includes the following steps: In step S504, when the high-voltage battery is in the second abnormal state, the vehicle control unit responds to receiving a notification message that the engine ignition is successful, and controls the power generation power of the motor assembly according to the required power of the drive motor, so as to supply power to the drive motor through the motor assembly. The drive motor is used to drive the vehicle to travel in a preset limp mode.

[0075] In step S505, the vehicle control unit controls the preset electrical device to be turned on. The preset electrical device is used to absorb the target difference power, and the target difference power is the difference between the power generation amount of the motor assembly and the power consumption amount of the drive motor.

[0076] In addition, when it is determined that the high-voltage battery is in a preset fault state, after controlling the engine to start, in order to prevent the low-voltage battery from discharging, the vehicle control unit can also control the bidirectional voltage converter to enter a second working mode, and the second working mode is a high-voltage to low-voltage mode.

[0077] Regarding the method in the above embodiments, the specific manners of each part have been described in detail in the embodiments related to the vehicle control system, and will not be elaborated here.

[0078] By adopting the above method, when it is determined that the power of the high-voltage battery is low, or the high-voltage battery is severely low in temperature and cannot output power externally, the engine can still start normally. After starting, it can complete the charging or heating of the high-voltage battery, so as to control the vehicle to enter the normal working mode. When it is determined that the high-voltage battery fails, after controlling the engine to start, it drives the motor assembly to generate electricity. After supplying power to the drive motor, the vehicle is driven by the drive motor to ensure that the vehicle can safely drive to the repair point, realizing the limp-home function.

[0079] The present disclosure also provides a computer-readable storage medium, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the vehicle control method provided by the present disclosure are implemented.

[0080] Figure 7 It is a block diagram of a vehicle shown according to an exemplary embodiment. The vehicle may include the vehicle control system in the above embodiment. For example, the vehicle 600 may be a hybrid vehicle, or a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle or other types of vehicles. The vehicle 600 may be an autonomous vehicle, a semi-autonomous vehicle or a non-autonomous vehicle.

[0081] Referring to Figure 7 , the vehicle 600 may include various subsystems. For example, the infotainment system 610, the perception system 620, the decision control system 630, the drive system 640, and the computing platform 650. Among them, the vehicle 600 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 600 may be interconnected by wired or wireless means.

[0082] In some embodiments, the infotainment system 610 may include a communication system, an entertainment system, a navigation system, etc.

[0083] The perception system 620 may include several sensors for sensing information about the environment around the vehicle 600. For example, the perception system 620 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0084] The decision control system 630 may include a computing system, a vehicle controller, a steering system, an accelerator, and a braking system.

[0085] The drive system 640 may include components that provide motive power for the vehicle 600. In one embodiment, the drive system 640 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting the energy provided by the energy source into mechanical energy.

[0086] Some or all of the functions of the vehicle 600 are controlled by the computing platform 650. The computing platform 650 may include at least one processor 651 and a memory 652. The processor 651 may execute instructions 653 stored in the memory 652.

[0087] The processor 651 may be any conventional processor, such as a commercially available CPU. The processor may also include, for example, a Graphic Process Unit (GPU), a Field Programmable Gate Array (FPGA), a System on Chip (SOC), an Application Specific Integrated Circuit (ASIC), or a combination thereof.

[0088] The memory 652 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0089] In addition to the instructions 653, the memory 652 may also store data, such as road maps, route information, data on the position, direction, speed, etc. of the vehicle. The data stored in the memory 652 can be used by the computing platform 650.

[0090] In an embodiment of the present disclosure, the processor 651 may execute the instructions 653 to complete all or part of the steps of the above-described vehicle control method.

[0091] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for performing the above-described vehicle control method when executed by the programmable device.

[0092] Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art can use various methods to implement the described functionality for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present application.

[0093] In addition, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be understood as being advantageous compared to other aspects or designs. Instead, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to mean any arrangement in a natural inclusive arrangement. That is, if X applies A; X applies B; or X applies both A and B, then "X applies A or B" is satisfied in any of the foregoing instances. Additionally, unless otherwise specified or clear from the context indicating a singular form, the articles "a" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0094] Similarly, although the present disclosure has been shown and described with respect to one or more implementations, those skilled in the art will envision equivalent variations and modifications after reading and understanding this specification and the drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. Specifically with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if not structurally equivalent to the disclosed structure. Additionally, although a particular feature of the present disclosure may have been disclosed with respect to only one of several implementations, such a feature may be combined with one or more other features of other implementations as may be desired and advantageous for any given or particular application. Furthermore, with respect to the use of "comprising", "having", "including", "with", or variations thereof in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term "including".

[0095] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only illustrative, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0096] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

[0097] In the above detailed description, reference has been made to the accompanying drawings, in which specific aspects in which the present disclosure can be practiced are shown by way of illustration. In this regard, directional or positional relationship indicating terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. can be used with reference to the orientation of the described figures. Since the components of the described device can be positioned in a plurality of different orientations, the directional terms can be used for illustrative purposes and not be restrictive. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of the present disclosure. Therefore, the following detailed description should not be taken in a limiting sense.

[0098] It should be understood that, unless otherwise specifically stated, the features of some embodiments of the various present disclosures described herein can be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more of them; similarly, "at least one of..." includes any one of the related listed items and any combination of any two or more of them.

[0099] It should be understood that, unless otherwise clearly specified and limited, the terms such as "engagement", "attachment", "installation", "connection", "connection", "fixation", etc. used in the embodiments of the present disclosure should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present context can be understood according to specific circumstances.

[0100] In addition, the term "above" as used herein with respect to a component, element, or layer of material formed "above" or located "above" a surface can be used to indicate that the component, element, or layer of material is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or layer of material. However, the term "above" as used herein with respect to a component, element, or layer of material formed "above" or located "above" a surface can also optionally have a specific meaning: the component, element, or layer of material is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, e.g., in direct contact with the surface.

[0101] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited to these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, the first component, element, region, layer, or section referred to in the examples described herein could also be termed the second component, element, region, layer, or section without departing from the teachings of the examples. Additionally, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description herein, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and explicitly defined.

[0102] It should be understood that spatial relative terms, such as "above", "upper", "below", and "lower", are used herein to describe the relationship of one element shown in the figures to another element. In addition to the orientation depicted in the figures, such spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to that other element. Thus, the term "above" encompasses both the above and below orientations depending on the spatial orientation of the device. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

Claims

1. A vehicle control system, characterized in that, The system includes: a low-voltage battery, a high-voltage battery, a vehicle controller, and a bidirectional voltage converter, a motor assembly, and an engine respectively connected to the vehicle controller; wherein, one end of the bidirectional voltage converter is connected to the low-voltage battery, the other end of the bidirectional voltage converter is connected to the motor assembly and the high-voltage battery, and the motor assembly is further connected to the engine; The vehicle controller is configured to, when the state of the high-voltage battery is abnormal, control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter, so as to drive the engine to start through the motor assembly.

2. The system according to claim 1, wherein The vehicle controller is configured to, when the state of the high-voltage battery is abnormal, control the bidirectional voltage converter to enter a first working mode, and the first working mode is a mode of converting low voltage to high voltage, so as to convert the output voltage of the low-voltage battery into the required voltage of the motor assembly through the bidirectional voltage converter and then supply power to the motor assembly.

3. The system according to claim 1, characterized in that, The vehicle controller is further configured to, after the engine starts, control the motor assembly to be in an idling non-power generation state within a preset duration starting from a preset moment, and the preset moment includes the moment when the engine ignition is successful.

4. The system according to claim 1, wherein The system further includes: a switching device, and the switching device is connected between the bidirectional voltage converter and the high-voltage battery; The vehicle controller is further configured to, when the state of the high-voltage battery is abnormal, control the switching device to disconnect, and after the switching device disconnects, control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter.

5. The system according to claim 4, wherein The abnormal state of the high-voltage battery includes a first abnormal state; The vehicle controller is further configured to, when the high-voltage battery is in the first abnormal state, in response to receiving a notification message that the engine ignition is successful, control the motor assembly and the engine to enter a power generation mode.

6. The system according to claim 5, wherein The first abnormal state includes at least one of the following: the power of the high-voltage battery is less than or equal to a preset power threshold; the battery temperature of the high-voltage battery is less than or equal to a preset temperature threshold.

7. The system according to claim 5, wherein The vehicle controller is further configured to control the motor assembly and the engine to enter a power generation mode in the following manner: control the bidirectional voltage converter to enter a second working mode, and the second working mode is a mode of converting high voltage to low voltage; control the switching device to close; control the motor assembly to charge the high-voltage battery and / or perform heating control on the high-voltage battery.

8. The system according to claim 4, wherein The system further includes a drive motor connected to the voltage output end of the motor assembly, and the abnormal state of the high-voltage battery includes a second abnormal state; The vehicle controller is further configured to, when the high-voltage battery is in the second abnormal state, in response to receiving a notification message that the engine ignition is successful, control the power generation power of the motor assembly according to the required power of the drive motor, so as to supply power to the drive motor through the motor assembly, and the drive motor is used to drive the vehicle to travel in a preset limp-home mode.

9. The system according to claim 8, wherein The system further includes a preset electrical device connected to the voltage output terminal of the motor assembly, and the preset electrical device is connected in parallel with the drive motor; The vehicle control unit is further configured to control the preset electrical device to be turned on, and the preset electrical device is used to absorb the target difference in power, where the target difference in power is the difference between the power generated by the motor assembly and the power consumed by the drive motor.

10. The system according to claim 9, wherein The vehicle control unit is further configured to control the bidirectional voltage converter to enter a second operating mode, and the second operating mode is a high-voltage to low-voltage mode.

11. The system according to claim 8, wherein The second abnormal state includes that the high-voltage battery is in a preset fault state.

12. A vehicle control method, characterized in that, Applied to a vehicle control system, the system includes a low-voltage battery, a high-voltage battery, a vehicle control unit, and a bidirectional voltage converter, a motor assembly, and an engine respectively connected to the vehicle control unit; wherein one end of the bidirectional voltage converter is connected to the low-voltage battery, the other end of the bidirectional voltage converter is connected to the motor assembly, and the motor assembly is further connected to the engine; the method includes: When the state of the high-voltage battery is abnormal, the vehicle control unit is used to control the low-voltage battery to supply power to the motor assembly through the bidirectional voltage converter, so as to drive the engine to start through the motor assembly.

13. A vehicle, characterized in that, Including the vehicle control system according to any one of claims 1-11.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to claim 12.

15. A computer program product, characterized in that, Including a computer program, which implements the steps of the method according to claim 12 when executed by a processor.

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