Power supply control method, device, equipment and storage medium for hybrid vehicle

Abstract

This invention discloses a power control method, device, equipment, and storage medium for hybrid vehicles, relating to the field of vehicle power control technology. The method includes the following steps: determining the supply mode of the low-voltage auxiliary power supply based on the engine's starting method and operating status, and through the start-stop coordination of the generator and DC-DC converter. By coordinating the start-stop of the generator and DC-DC converter, the low-voltage auxiliary power supply of the hybrid vehicle can be used rationally, which can reduce engine fuel consumption while ensuring performance, and also avoid hardware damage or vehicle alarms, thereby improving vehicle reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power control, and in particular to a power control method, device, equipment and storage medium for a hybrid vehicle. Background Art

[0002] In the field of hybrid commercial vehicles, a single generator or DCDC is usually used for low-voltage auxiliary power control, or both components are installed at the same time. However, in terms of control strategy, the generator and the engine are usually set to work synchronously. As long as the engine is started, the generator is driven synchronously. In this solution model, in the power demand calculation, the power required by the generator must be included in the engine body, resulting in the actual torque allocated to the engine being greater than the torque required for driving, causing the engine to run in a non-efficient range and increasing engine fuel consumption. Summary of the invention

[0003] The main purpose of the present invention is to provide a power control method, device, equipment and storage medium for a hybrid vehicle. Through the start-stop coordination of the generator and the DCDC, the rational use of the low-voltage auxiliary power supply of the hybrid vehicle can be achieved, which can reduce the engine fuel consumption while ensuring performance, and can also avoid hardware damage or vehicle alarms, thereby improving vehicle reliability.

[0004] In a first aspect, the present application provides a power supply control method for a hybrid vehicle, the method comprising the steps of:

[0005] The supply mode of the system low-voltage auxiliary power supply is determined according to the engine starting mode and the engine operating status, and through the start and stop coordination of the generator and the DCDC converter.

[0006] In combination with the first aspect above, as an optional implementation method, the method of determining the supply method of the system low-voltage auxiliary power supply according to the starting method of the engine and through the start-stop coordination of the generator and the DCDC converter includes the steps of:

[0007] When the engine is started by motor starting, the vehicle controller turns off the generator and DCDC converter, and supplies power to the system low-voltage auxiliary power supply through the lead-acid battery;

[0008] When the engine is started by reverse motor dragging, the vehicle controller turns off the generator and supplies power to the system's low-voltage auxiliary power supply through the DCDC converter.

[0009] In combination with the first aspect above, as an optional implementation method, the method of determining the supply mode of the system low-voltage auxiliary power supply according to the operating state of the engine and through the start-stop coordination of the generator and the DCDC converter also includes the steps of:

[0010] When the engine is started, the vehicle controller turns off the generator and turns on the DCDC converter, which supplies power to the system's low-voltage auxiliary power supply;

[0011] When the engine is working stably, the vehicle controller calculates the required torque of the vehicle and determines the supply mode of the system low-voltage auxiliary power supply according to the required torque of the vehicle.

[0012] In combination with the first aspect, as an optional implementation, when the engine is working stably, the vehicle controller calculates the vehicle required torque, and determines the supply mode of the system low-voltage auxiliary power supply according to the vehicle required torque, including:

[0013] When the engine output torque is greater than the vehicle required torque and the engine has surplus torque, the vehicle controller starts the generator and supplies power to the system low-voltage auxiliary power supply through the generator;

[0014] When the engine output torque is less than or equal to the vehicle required torque and the engine has no surplus torque, the vehicle controller turns off the generator and turns on the DCDC converter to supply power to the system low-voltage auxiliary power supply through the DCDC converter.

[0015] In combination with the first aspect, as an optional implementation, after the vehicle controller calculates the required torque of the vehicle, the following steps are included:

[0016] Distribute the calculated vehicle demand torque so that the engine operates in a high efficiency range, where the vehicle specific fuel consumption is in the range of 0-194 g / kWh;

[0017] The required torque of the whole vehicle is calculated according to the accelerator pedal of the vehicle and the current vehicle state, wherein the vehicle state includes: vehicle speed, slope, and acceleration.

[0018] In combination with the first aspect above, as an optional implementation, when the vehicle is in pure electric mode, when the vehicle load is less than the output power of the DCDC converter, the DCDC converter outputs current according to the vehicle load;

[0019] When the vehicle demand current is greater than the maximum output current of the DCDC converter, the DCDC converter outputs at maximum power and issues an overcurrent warning to the vehicle.

[0020] In combination with the first aspect above, as an optional implementation method, the step of issuing an overcurrent warning to the vehicle includes the following steps:

[0021] When the output power of the DCDC converter fails, it is sent to the vehicle controller in the form of a fault code;

[0022] After receiving and identifying the fault code, the vehicle controller executes corresponding fault measures and displays the fault on the instrument to alert the driver.

[0023] In a second aspect, the present application provides a power supply control device for a hybrid vehicle, the device comprising:

[0024] The determination module is used to determine the supply mode of the system low-voltage auxiliary power supply according to the engine starting mode and the engine running state, and through the start and stop coordination of the generator and the DCDC converter.

[0025] In a third aspect, the present application further provides an electronic device, comprising: a processor; a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the method described in any one of the first aspects is implemented.

[0026] In a fourth aspect, the present application further provides a computer-readable storage medium storing computer program instructions, which, when executed by a computer, enables the computer to execute any of the methods described in the first aspect.

[0027] The present application provides a power control method, device, equipment and storage medium for a hybrid vehicle. According to the engine starting mode and the engine operating state, and through the start-stop coordination of the generator and the DCDC converter, the supply mode of the system low-voltage auxiliary power is determined. Through the start-stop coordination of the generator and the DCDC, the reasonable use of the low-voltage auxiliary power of the hybrid vehicle is achieved, which can reduce the engine fuel consumption while ensuring performance, and can also avoid hardware damage or vehicle alarms, thereby improving vehicle reliability.

[0028] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0030] Figure 1 A flow chart of a power control method for a hybrid vehicle provided in an embodiment of the present application

[0031] Figure 2 A schematic diagram of a power supply control device for a hybrid vehicle provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of low-voltage auxiliary power supply control provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of an electronic device provided in an embodiment of the present application;

[0034] Figure 5 This is a schematic diagram of a computer-readable program medium provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying 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 embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0036] Furthermore, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. Some of the blocks shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities.

[0037] The embodiment of the present application provides a power control method, device, equipment and storage medium for a hybrid vehicle, which realizes the reasonable use of low-voltage auxiliary power supply of hybrid vehicles through the start-stop coordination of the generator and DCDC, and can reduce engine fuel consumption while ensuring performance, and can also avoid hardware damage or vehicle alarms, thereby improving vehicle reliability. It should be noted that a hybrid vehicle refers to a vehicle equipped with two or more power sources such as batteries, fuel cells, solar cells and internal combustion locomotive generator sets.

[0038] In order to achieve the above technical effects, the general idea of ​​this application is as follows:

[0039] A power control method for a hybrid vehicle, the method comprising the steps of:

[0040] S101: According to the engine starting mode and the engine running state, and through the start and stop coordination of the generator and the DCDC converter, the supply mode of the system low-voltage auxiliary power supply is determined.

[0041] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0042] Reference Figure 1 , Figure 1 FIG. 1 is a flow chart of a power supply control method for a hybrid vehicle provided by the present invention. Figure 1 As shown, a power control flow chart of a hybrid vehicle includes the following steps:

[0043] Step S101: According to the engine starting mode and the engine running state, and through the start and stop coordination of the generator and the DCDC converter, the supply mode of the system low-voltage auxiliary power supply is determined.

[0044] Specifically, in hybrid mode, when the engine of a hybrid vehicle is started as a motor, the starting current is too large at the moment the engine starts, far exceeding the power of the DCDC converter. The vehicle controller controls the disconnection of the DCDC converter, that is, the DCDC converter stops outputting, so as to avoid the risk of overcurrent failure or component damage in the DCDC converter. In addition, at the moment the engine starts, the vehicle controller also disconnects the generator from the engine, that is, stops the operation of the generator. At this time, the vehicle supplies power to the system low-voltage auxiliary power supply through the lead-acid battery.

[0045] In addition, in hybrid mode, when the engine is started in reverse, the vehicle controller shuts down the generator to stop the generator from working without shutting down the DCDC converter. At this time, the system low-voltage auxiliary power is supplied by the DCDC converter. It should be noted that the reverse start of the engine is the opposite, by pushing the car, the wheels drive the car's transmission system to rotate, and the transmission system then drives the engine to rotate, so that the engine is started by reverse power transmission. Reverse drag is often used to temporarily start the engine when the battery is low or there is a problem with the starter motor system.

[0046] Among them, the DCDC converter repeatedly turns on and off the switch to convert the DC voltage or current into a high-frequency square wave voltage or current, and then rectifies and smoothes it into a DC voltage output.

[0047] In one embodiment, the supply mode of the system low-voltage auxiliary power supply is determined according to the operating state of the engine and through the start-stop coordination of the generator and the DCDC converter. Specifically, when the vehicle is in hybrid mode, after the engine is started, the vehicle controller controls the engine to stop the generator in order not to consume the power of the engine. At the same time, the vehicle controller starts the DCDC converter so that the DCDC supplies power to the system low-voltage auxiliary power supply.

[0048] When the engine enters the direct drive working mode, that is, the engine is working stably, the vehicle controller calculates the vehicle's required torque according to the vehicle's accelerator pedal and the current vehicle status, where the vehicle status includes: vehicle speed, slope, acceleration, and distributes power to the calculated vehicle's required torque so that the engine operates within a high-efficiency range (maximizing engine efficiency), where the high-efficiency range is when the vehicle's specific fuel consumption is in the range of 0-194g / kWh. It should be noted that 192g / kWh is the highest efficiency range, followed by 194g / kWh. The high-efficiency range is defined as a specific fuel consumption of less than 194g / kWh, and the torque range corresponding to the fuel consumption is 450-850Nm, and the speed range is 1050rpm-1630rpm.

[0049] When the engine is operating in a high-efficiency range, the engine output torque is greater than the vehicle's required torque. At this time, the engine has surplus torque, which can be supplied to the generator to make the generator work. At this time, the vehicle controller controls the generator to start working, and the generator provides the electrical energy required by the vehicle's low-voltage system.

[0050] When the engine is operating in a high-efficiency range, the engine output torque is less than or equal to the vehicle's required torque. At this time, the engine has no surplus torque, that is, the engine's actual torque must be used entirely to measure driving needs. At this time, the vehicle controller turns off the generator and controls the vehicle's DCDC converter to start working, with the DCDC providing the electrical energy required by the vehicle's low-voltage system.

[0051] In one embodiment, it is assumed that the generator consumes 10Nm of engine torque, the current vehicle speed requirement requires the engine speed to be 1300RPM, and the engine torque output range is within the range of 520Nm to 730Nm, which belongs to the engine high speed range. If the current VCU calculates that the vehicle's required torque is greater than 740Nm, the generator output should be turned off and DCDC enabled; when the calculated vehicle's required torque is less than 740N, the generator output should be turned on.

[0052] In one embodiment, when the vehicle is in pure electric mode, the vehicle controller controls the DCDC converter to operate. When the vehicle load is less than the output power of the DCDC converter, the DCDC converter outputs current according to the vehicle load, where the vehicle load is the sum of the power of low-voltage electrical devices.

[0053] When the vehicle's demand current is greater than the maximum output capacity of the DCDC converter, the DCDC converter outputs at maximum power and issues an overcurrent warning to the vehicle.

[0054] The specific method of sending overcurrent warning to the whole vehicle is as follows: the DCDC converter itself detects the output power. When the output power of the DCDC converter fails, it is sent out in the form of a fault code. After the vehicle controller recognizes the fault code, it executes the corresponding fault measures. At the same time, the vehicle instrument will display the fault on the instrument to alert the driver.

[0055] This application controls the engine and generator independently, determines the supply mode of the system low-voltage auxiliary power supply through the start and stop coordination of the generator and the DCDC converter, and provides a variety of system low-voltage power supply strategies based on the engine output torque and the vehicle's required torque when the vehicle is in a high-efficiency range.

[0056] Reference Figure 2 , Figure 2 FIG. 1 is a schematic diagram of a power supply control device for a hybrid vehicle provided by the present invention, such as Figure 2 As shown, a power control device for a hybrid vehicle includes:

[0057] Determination module 201: used to determine the supply mode of the system low-voltage auxiliary power supply according to the starting mode and the running state of the engine and through the start-stop coordination of the generator and the DCDC converter.

[0058] Further, in a possible implementation manner, the determination module 201 is also used for, when the engine is started in a motor start mode, the vehicle controller turns off the generator and the DCDC converter, and supplies power to the system low-voltage auxiliary power supply through the lead-acid battery;

[0059] When the engine is started by reverse motor dragging, the vehicle controller turns off the generator and supplies power to the system's low-voltage auxiliary power supply through the DCDC converter.

[0060] Further, in a possible implementation manner, the determination module 201 is also used for, when the engine is started, the vehicle controller turns off the generator and turns on the DCDC converter, and supplies power to the system low-voltage auxiliary power supply through the DCDC converter;

[0061] When the engine is working stably, the vehicle controller calculates the required torque of the vehicle and determines the supply mode of the system low-voltage auxiliary power supply according to the required torque of the vehicle.

[0062] Further, in a possible implementation manner, the determination module 201 is further configured to, when the engine output torque is greater than the vehicle required torque and the engine has surplus torque, the vehicle controller starts the generator to supply power to the system low-voltage auxiliary power supply through the generator;

[0063] When the engine output torque is less than or equal to the vehicle required torque and the engine has no surplus torque, the vehicle controller turns off the generator and turns on the DCDC converter to supply power to the system low-voltage auxiliary power supply through the DCDC converter.

[0064] Further, in a possible implementation manner, the determination module 201 is further configured to distribute power to the calculated vehicle demand torque so that the engine operates within a high efficiency range, wherein the high efficiency range is a range where the vehicle specific fuel consumption is within a range of 0-194 g / kWh;

[0065] The required torque of the whole vehicle is calculated according to the accelerator pedal of the vehicle and the current vehicle state, wherein the vehicle state includes: vehicle speed, slope, and acceleration.

[0066] Further, in a possible implementation manner, the determination module 201 is further configured to: when the vehicle is in pure electric mode, when the vehicle load is less than the output power of the DCDC converter, the DCDC converter outputs current according to the vehicle load;

[0067] When the vehicle demand current is greater than the maximum output current of the DCDC converter, the DCDC converter outputs at maximum power and issues an overcurrent warning to the vehicle.

[0068] Further, in a possible implementation manner, the determination module 201 is further configured to send a fault code to the vehicle controller when the output power of the DCDC converter fails;

[0069] After receiving and identifying the fault code, the vehicle controller executes corresponding fault measures and displays the fault on the instrument to alert the driver.

[0070] Reference Figure 3 , Figure 3 FIG. 1 is a schematic diagram of the low voltage auxiliary power supply control provided by the present invention. Figure 3 As shown:

[0071] The low-voltage auxiliary power supply is controlled by the vehicle controller as a whole, and the controlled objects are the engine, generator (G), DCDC converter, the energy of the DCDC converter comes from the power battery, and the power of the generator comes from the engine. The function of the low-voltage auxiliary power supply is to provide electrical energy for the vehicle electrical components, including lights (Lamp1), wipers, and vehicle controllers; start the engine, at which time the generator and DCDC converter do not participate in the work, and the starting energy is provided by the BT1 lead-acid battery.

[0072] Refer to the following Figure 4 An electronic device 400 according to this embodiment of the present invention will be described. Figure 4 The electronic device 400 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0073] like Figure 4As shown, the electronic device 400 is in the form of a general computing device. The components of the electronic device 400 may include but are not limited to: at least one processing unit 410, at least one storage unit 420, and a bus 430 connecting different system components (including the storage unit 420 and the processing unit 410).

[0074] The storage unit stores program codes, which can be executed by the processing unit 410, so that the processing unit 410 executes the steps according to various exemplary embodiments of the present invention described in the above “Embodiment Method” section of this specification.

[0075] The storage unit 420 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 421 and / or a cache memory unit 422 , and may further include a read-only memory unit (ROM) 423 .

[0076] The storage unit 420 may also include a program / utility 424 having a set (at least one) of program modules 425, such program modules 425 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0077] Bus 430 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0078] The electronic device 400 may also communicate with one or more external devices 500 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 400, and / or communicate with any device that enables the electronic device 400 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 450. Furthermore, the electronic device 400 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 460. As shown, the network adapter 460 communicates with other modules of the electronic device 400 via a bus 430. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 400, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0079] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0080] According to the solution of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible implementations, various aspects of the present invention can also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary implementations of the present invention described in the above "Exemplary Method" section of the present specification.

[0081] refer to Figure 5 As shown, a program product 500 for implementing the above method according to an embodiment of the present invention is described, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0082] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0083] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0084] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0085] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0086] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to an exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0087] In summary, the present application provides a power control method, device, equipment and storage medium for a hybrid vehicle, which determines the supply mode of the system low-voltage auxiliary power supply according to the engine starting mode and the engine operating state, and through the start-stop coordination of the generator and the DCDC converter. Through the start-stop coordination of the generator and the DCDC, the reasonable use of the low-voltage auxiliary power supply of the hybrid vehicle is achieved, which can reduce the engine fuel consumption while ensuring performance, and can also avoid hardware damage or vehicle alarms, thereby improving vehicle reliability.

[0088] The above is only an embodiment of the present application. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A power control method for a hybrid vehicle, It is characterized in that include: According to the engine starting mode and engine running status, and through the start and stop coordination of the generator and the DCDC converter, the system low-voltage auxiliary power supply mode is determined; Among them, the low-voltage auxiliary power supply is controlled by the vehicle controller as a whole, and the controlled objects are the engine, generator, and DCDC converter. The energy of the DCDC converter comes from the power battery, and the power of the generator comes from the engine. The low-voltage auxiliary power supply provides power for the vehicle electrical components, and the vehicle electrical components include: lights, wipers and vehicle controllers; Among them, when the engine is started by motor starting, the vehicle controller turns off the generator and DCDC converter, and supplies power to the system low-voltage auxiliary power supply through the lead-acid battery; When the engine is started in reverse motor mode, the vehicle controller turns off the generator and supplies power to the system low-voltage auxiliary power supply through the DCDC converter; When the engine is started, the vehicle controller turns off the generator and turns on the DCDC converter, which supplies power to the system's low-voltage auxiliary power supply; When the engine is working stably, the vehicle controller calculates the vehicle required torque and determines the supply mode of the system low-voltage auxiliary power supply according to the vehicle required torque, including: When the engine output torque is greater than the vehicle's required torque and the engine has surplus torque, the vehicle controller turns on the generator and supplies power to the system's low-voltage auxiliary power supply through the generator; when the engine output torque is less than or equal to the vehicle's required torque and the engine has no surplus torque, the vehicle controller turns off the generator and turns on the DCDC converter to supply power to the system's low-voltage auxiliary power supply through the DCDC converter.

2. The method according to claim 1, It is characterized in that After the vehicle controller calculates the required torque of the vehicle, it includes: Distribute the calculated vehicle demand torque so that the engine operates in a high efficiency range, where the vehicle specific fuel consumption is in the range of 0-194 g / kWh; The required torque of the whole vehicle is calculated according to the accelerator pedal of the vehicle and the current vehicle state, wherein the vehicle state includes: vehicle speed, slope, and acceleration.

3. The method according to claim 1, Features: When the vehicle is in pure electric mode, when the vehicle load is less than the output power of the DCDC converter, the DCDC converter outputs current according to the vehicle load; When the vehicle demand current is greater than the maximum output current of the DCDC converter, the DCDC converter outputs at maximum power and issues an overcurrent warning to the vehicle.

4. The method according to claim 3, It is characterized in that The issuing of an overcurrent warning to the entire vehicle includes: When the output power of the DCDC converter fails, it is sent to the vehicle controller in the form of a fault code; After receiving and identifying the fault code, the vehicle controller executes corresponding fault measures and displays the fault on the instrument to alert the driver.

5. A power supply control device for a hybrid vehicle, It is characterized in that include: A determination module is used to determine the supply mode of the system low-voltage auxiliary power supply according to the engine starting mode and the engine running state, and through the start-stop coordination of the generator and the DCDC converter, wherein the low-voltage auxiliary power supply is controlled by the vehicle controller as a whole, wherein the controlled objects are the engine, the generator, and the DCDC converter, wherein the energy of the DCDC converter comes from the power battery, the power of the generator comes from the engine, and the low-voltage auxiliary power supply provides electrical energy for the vehicle electrical components, wherein the vehicle electrical components include: lights, wipers, and vehicle controllers; Among them, when the engine is started by motor starting, the vehicle controller turns off the generator and DCDC converter, and supplies power to the system low-voltage auxiliary power supply through the lead-acid battery; When the engine is started in reverse motor mode, the vehicle controller turns off the generator and supplies power to the system low-voltage auxiliary power supply through the DCDC converter; When the engine is started, the vehicle controller turns off the generator and turns on the DCDC converter, which supplies power to the system's low-voltage auxiliary power supply; When the engine is working stably, the vehicle controller calculates the vehicle required torque and determines the supply mode of the system low-voltage auxiliary power supply according to the vehicle required torque, including: When the engine output torque is greater than the vehicle's required torque and the engine has surplus torque, the vehicle controller turns on the generator and supplies power to the system's low-voltage auxiliary power supply through the generator; when the engine output torque is less than or equal to the vehicle's required torque and the engine has no surplus torque, the vehicle controller turns off the generator and turns on the DCDC converter to supply power to the system's low-voltage auxiliary power supply through the DCDC converter.

6. An electronic device, It is characterized in that The electronic device comprises: processor; A memory having computer-readable instructions stored thereon, wherein when the computer-readable instructions are executed by the processor, the method according to any one of claims 1 to 4 is implemented.

7. A computer-readable storage medium, It is characterized in that The computer program instructions are stored therein, and when the computer program instructions are executed by a computer, the computer is caused to execute the method according to any one of claims 1 to 4.

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