A control method and device of a vehicle and a storage medium

Abstract

The application relates to the new energy technology field and discloses a control method and device of a vehicle and a storage medium, the vehicle comprising a hydrogen fuel system, an electric system connected with the hydrogen fuel system, a power battery thermal management system and a controller, the method comprising the following steps: acquiring a power battery temperature and an ambient temperature; if the ambient temperature is less than a preset ambient temperature and the power battery temperature is less than a preset temperature, the hydrogen fuel cell is controlled to work, and the power battery thermal management system is controlled to provide the waste heat generated by the hydrogen fuel cell to the power battery for heating. Therefore, when the low-temperature environment causes the power battery temperature to be too low and further influences the output performance and the cruising range of the power battery, the waste heat generated by the hydrogen fuel cell working is provided to the power battery for heating through the power battery thermal management system, the power battery temperature is rapidly increased to an optimal working temperature range, and the output power and the discharge capacity of the power battery under the low-temperature environment are ensured.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a vehicle control method, device and storage medium. Background Technology

[0002] Due to limitations in driving range and charging convenience of pure electric vehicles, hydrogen-electric hybrid vehicles, which combine hydrogen fuel cell systems and electric systems, are rapidly developing. In hydrogen-electric hybrid vehicles, the hybrid power supply system provides electrical energy to the vehicle. When the vehicle starts, the power battery supplies power to the drive motor and various electrical components. During driving, the hydrogen fuel cell and the power battery work together to ensure the vehicle's performance.

[0003] In low-temperature environments, the actual driving range of a hydrogen-electric hybrid vehicle is significantly reduced. Specifically, when the ambient temperature is too low, the activity of the battery decreases, the amount of dischargeable electricity is reduced compared to the nominal capacity, and the output power of the battery is lower. If the battery is used to supply power to the battery heater to heat the battery at this time, the state of charge (SOC) of the battery will drop rapidly, resulting in a significant reduction in the vehicle's driving range.

[0004] Therefore, how to solve the problem of reduced output power and severely reduced discharge capacity of power batteries in low-temperature environments is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, one aspect of this application provides a method for controlling a vehicle, the vehicle including a hydrogen fuel system, an electric system connected to the hydrogen fuel system, a power battery thermal management system, and a controller, the method comprising: Obtain the power battery temperature and ambient temperature of the power battery in the electric system; If the ambient temperature is lower than the preset ambient temperature, and the temperature of the power battery is lower than the preset temperature, the hydrogen fuel cell in the hydrogen fuel system is controlled to operate, and the power battery thermal management system is controlled to use the waste heat generated by the hydrogen fuel cell to heat the power battery.

[0006] Another aspect of this application provides a vehicle comprising: a hydrogen fuel system, an electric system, a power battery thermal management system, and a controller; The hydrogen fuel system is connected to the electric system, and the heat exchange pipeline of the power battery thermal management system passes through the hydrogen fuel cell in the hydrogen fuel system and the power battery in the electric system. The controller is communicatively connected to the power battery thermal management system, the hydrogen fuel cell, and the power battery, and is used to implement the vehicle control method.

[0007] Another aspect of this application provides a vehicle control device, comprising: The acquisition module is used to acquire the power battery temperature and ambient temperature of the power battery in the electric system. The processing module is used to control the hydrogen fuel cell in the hydrogen fuel system to operate when the ambient temperature is lower than the preset ambient temperature and the power battery temperature is lower than the preset temperature, and to control the power battery thermal management system to use the waste heat generated by the hydrogen fuel cell to heat the power battery.

[0008] Another aspect of this application provides a vehicle control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a vehicle control method.

[0009] Another aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for controlling the vehicle.

[0010] The vehicle control method, device, and storage medium provided in this application address situations where a low-temperature environment causes the power battery temperature to drop too low, thereby affecting the power battery's output performance and driving range. Specifically, when the ambient temperature is lower than a preset ambient temperature and the power battery temperature is lower than a preset temperature, the method controls the operation of the hydrogen fuel cell and controls the power battery thermal management system to provide the power battery with the waste heat generated by the hydrogen fuel cell to heat it. This allows the power battery temperature to rise rapidly to the optimal operating temperature range, ensuring the power battery's output power and discharge capacity under low-temperature conditions, thereby improving the overall performance of the vehicle. Attached Figure Description

[0011] Figure 1 A schematic flowchart illustrating a vehicle control method provided in an embodiment of this application; Figure 2 A schematic diagram of a hydrogen fuel cell energy transmission path provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a power battery thermal management system provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a vehicle control device provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a vehicle control device provided in another embodiment of this application.

[0012] The attached diagram is labeled as follows: 1 is the first end, 2 is the second end, 3 is the third end, 4 is the fourth end, 5 is the fifth end, 6 is the sixth end, 30 is the power battery, 31 is the hydrogen fuel cell, 32 is the heat exchanger, 33 is the first three-way valve, 34 is the second three-way valve, 50 is the memory, 51 is the processor, 52 is the display screen, 53 is the input / output interface, 54 is the communication interface, 55 is the power supply, 56 is the communication bus, 501 is the computer program, 502 is the operating system, and 503 is the data. Detailed Implementation

[0013] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0014] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0015] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0016] Figure 1 This is a schematic flowchart of a vehicle control method provided in an embodiment of this application, as shown below. Figure 1 As shown, the method includes: S10: Obtain the power battery temperature and ambient temperature of the power battery in the electric system; First, it should be noted that the controlled vehicle corresponding to the control method provided in this application includes a hydrogen fuel system, an electric system connected to the hydrogen fuel system, a power battery thermal management system, and a controller. This vehicle includes, but is not limited to, sedans, SUVs, MPVs, off-road vehicles, pickup trucks, or other power-driven, non-rail-borne vehicles.

[0017] A hydrogen fuel cell system refers to a system that converts hydrogen and oxygen into electrical energy and water through an electrochemical reaction. The generated electrical energy can be supplied to the vehicle's drive motor or stored in the electric power system's battery. The electric power system is one of the main power sources for the vehicle's electrical output. It can be charged and stored using external charging equipment, and can also draw electrical energy from the hydrogen fuel cell system for storage. When the vehicle is in motion, the hydrogen fuel cell system and the electric power system work together to ensure the vehicle's performance.

[0018] The power battery thermal management system refers to the system that manages the thermal performance of the power battery in an electric system. It is mainly used to heat the power battery. Specifically, when the ambient temperature is low and the power battery temperature is low, the power battery thermal management system heats the power battery to ensure the output power of the power battery.

[0019] Figure 2 This is a schematic diagram of a hydrogen fuel cell energy transmission path provided in an embodiment of this application, as shown below. Figure 2 As shown, in a specific embodiment, after the hydrogen fuel system generates voltage through an electrochemical reaction, it is transmitted to the DC-DC converter, which boosts the voltage to supply the power battery or motor system. In addition to providing energy to the hydrogen fuel system, the motor system also provides electrical energy through the power battery. After receiving electrical energy, the motor system transmits it to the transmission system to ensure the vehicle's power performance.

[0020] In a specific embodiment, the controller is connected to the hydrogen fuel system, the electric system, and the power battery heat pipe system, respectively. In addition, the controller is also connected to an ambient temperature sensor and a power battery temperature sensor, whereby the ambient temperature sensor collects ambient temperature data, and the power battery temperature sensor collects power battery temperature data. Furthermore, the collected ambient temperature and power battery temperature data are transmitted to the controller.

[0021] It is worth noting that the execution subject in this application embodiment is a controller, which can be a separately configured controller, a vehicle controller, or a domain controller, etc., and this application does not limit it.

[0022] S11: If the ambient temperature is lower than the preset ambient temperature, and the power battery temperature is lower than the preset temperature, control the hydrogen fuel cell in the hydrogen fuel system to work, and control the power battery thermal management system to use the waste heat generated by the hydrogen fuel cell to heat the power battery.

[0023] Furthermore, after obtaining the power battery temperature and ambient temperature, if the ambient temperature is lower than the preset ambient temperature, and the power battery temperature is also lower than the preset temperature, it is determined that the power battery temperature is too low due to the low ambient temperature, that is, the power battery temperature is lower than the optimal operating temperature. If the vehicle is started at this time, the remaining power battery charge (State of Charge, or SOC) will drop rapidly, which will lead to a reduction in the vehicle's driving range.

[0024] Therefore, the technical solution provided in this application embodiment controls the hydrogen fuel cell to work when the ambient temperature is lower than the preset ambient temperature and the power battery temperature is lower than the preset temperature, and controls the power battery thermal management system to provide the waste heat generated by the hydrogen fuel cell to the power battery for heating.

[0025] It is understandable that hydrogen fuel cells generate a lot of waste heat when they are working. The temperature of hydrogen fuel cells is usually between 60 and 70 degrees Celsius. The heat generated by the hydrogen fuel cell is provided to the power battery to heat the power battery and make the temperature of the power battery rise rapidly to the optimal operating temperature range, thereby ensuring the output power and discharge capacity of the power battery.

[0026] Therefore, the vehicle control method provided in this application embodiment, when the low temperature environment causes the power battery temperature to be too low, thereby affecting the power battery output performance and driving range, that is, when the ambient temperature is lower than the preset ambient temperature and the power battery temperature is lower than the preset temperature, controls the operation of the hydrogen fuel cell and controls the power battery thermal management system to provide the waste heat generated by the operation of the hydrogen fuel cell to the power battery for heating, so that the power battery temperature rises rapidly to the optimal operating temperature range, ensuring the output power and discharge capacity of the power battery in the low temperature environment, thereby improving the overall performance of the vehicle.

[0027] In one optional embodiment, the vehicle control method further includes: acquiring the vehicle's current driving mode and the state of charge (SOC) of the power battery; wherein the driving mode includes a first driving mode and a second driving mode, and the second driving mode includes at least one of a long-distance driving mode and a racing driving mode.

[0028] It should be noted that the first driving mode is a different driving mode from the second driving mode. The first driving mode includes sport driving mode, economy driving mode and comfort driving mode, etc. The first driving mode can be understood as the normal driving mode or the default driving mode. It can also be understood as a driving mode that is different from the long-distance driving mode with high range requirements and the racing driving mode with high power output of the power battery.

[0029] Correspondingly, when the ambient temperature is lower than the preset ambient temperature, if the power battery temperature is lower than the preset temperature, the operation of the hydrogen fuel cell in the hydrogen fuel system is controlled, including: When the driving mode is set to the second driving mode, the output power of the hydrogen fuel cell is controlled according to the SOC of the power battery.

[0030] Understandably, long-distance driving mode places higher demands on the battery's range, while racing driving mode places higher demands on the battery's output power. Different driving modes require different states of charge (SOC) levels for the battery. Therefore, in specific embodiments, it is necessary to obtain the vehicle's current driving mode and the battery's SOC in order to control the output power of the hydrogen fuel cell based on these parameters.

[0031] Specifically, when the ambient temperature is lower than the preset ambient temperature and the power battery temperature is lower than the preset temperature, if the driving mode is the second driving mode, the output power of the hydrogen fuel cell in the hydrogen fuel system needs to be controlled according to the SOC of the power battery. In other words, different SOCs of the power battery correspond to different output powers of the hydrogen fuel cell.

[0032] Therefore, the vehicle control method provided in this application combines the vehicle's driving mode and the SOC of the power battery to accurately control whether the power battery is heated. That is, in the second driving mode, such as long-distance driving mode and racing driving mode, where the power battery output power is required to be high, the waste heat generated by the hydrogen fuel cell is used to heat the power battery to ensure the performance of the power battery.

[0033] Based on the above embodiments, as an optional embodiment, when the second driving mode is a long-distance driving mode, the output power of the hydrogen fuel cell is controlled according to the SOC of the power battery, including: If SOC > M1, control the output power of the hydrogen fuel cell to P1, and control the hydrogen fuel cell to shut down when the power battery temperature rises to the target temperature; If M2 < SOC ≤ M1, control the output power of the hydrogen fuel cell to P2, and control the hydrogen fuel cell to shut down when the power battery temperature rises to the target temperature; where P1 < P2. If SOC≤M2, the output power of the hydrogen fuel cell is controlled to be P3, and the hydrogen fuel cell is controlled to shut down when the power battery temperature rises to the target temperature and SOC>M1; where P2<P3, M1 and M2 are different preset SOC values.

[0034] Understandably, after a vehicle is submerged in low temperatures, the battery temperature drops significantly. Relying on the battery thermal management system and the vehicle's own heat to raise the battery temperature is slow and inefficient. Furthermore, maintaining the battery's optimal operating temperature (e.g., 20°C to 45°C) during driving also consumes a considerable amount of battery power. The State of Charge (SOC) of the battery indicates the remaining charge; the lower the SOC, the higher the output power of the hydrogen fuel cell.

[0035] Therefore, when the ambient temperature is lower than the preset ambient temperature and the power battery temperature is lower than the preset temperature, the output power of the hydrogen fuel cell is controlled according to the SOC of the power battery. If SOC > M1, it is determined that the power battery has a large amount of remaining power, so the output power requirement of the hydrogen fuel cell is small. The hydrogen fuel cell is controlled to work at the output power P1. At this time, the waste heat generated by the operation of the hydrogen fuel cell is used to heat the power battery. When the temperature of the power battery rises to the target temperature, that is, when the temperature of the power battery rises to the optimal operating temperature range, the hydrogen fuel cell is turned off.

[0036] If M2 < SOC ≤ M1, then the remaining amount of SOC is relatively small. At this time, the output power of the hydrogen fuel needs to be greater than P1. That is, the hydrogen fuel cell is controlled to work with an output power of P2, where P2 > P1. Similarly, when the temperature of the power battery rises to the target temperature, that is, when the temperature of the power battery rises to the optimal operating temperature range, the hydrogen fuel cell is shut down.

[0037] If SOC≤M2, the remaining SOC is at its minimum, requiring a larger output power from the hydrogen fuel. Therefore, the hydrogen fuel cell is controlled to operate at an output power of P3 (P3>P2), and the hydrogen fuel cell is controlled to shut down when the temperature of the power battery reaches the target temperature.

[0038] It should be noted that when the ambient temperature is lower than the preset ambient temperature and the power battery temperature is lower than the preset temperature, the power battery needs to be heated by the hydrogen fuel cell. At this time, the electrical energy generated by the hydrogen fuel cell can charge the power battery or be directly supplied to the vehicle. This application does not limit this.

[0039] Of course, in a preferred embodiment, when the second driving mode is a long-distance driving mode, the vehicle's range requirement is relatively high. Therefore, in addition to heating the power battery, the hydrogen fuel cell also charges the power battery.

[0040] It should also be noted that the SOC judgment level and the corresponding hydrogen fuel cell output power level setting in this application embodiment are only optional embodiments. More levels can be set to achieve more precise control, and this application does not limit this.

[0041] Therefore, the vehicle control method provided in this application embodiment can control the output power of the hydrogen fuel cell according to the SOC of the power battery when the second driving mode is the long-distance driving mode. In addition to ensuring that the power battery temperature can be heated to the optimal operating temperature range as soon as possible, it can also avoid wasting the energy of the hydrogen fuel cell.

[0042] In one optional embodiment, when the second driving mode is racing driving mode, the output power of the hydrogen fuel cell is controlled according to the SOC of the power battery, including: When the SOC of the power battery is less than the first threshold, the output power of the hydrogen fuel cell is controlled to the preset output power. When the power battery temperature rises to the target temperature and the power battery SOC is greater than the second threshold, the hydrogen fuel cell is controlled to shut down; wherein the first threshold is less than the second threshold.

[0043] In a specific embodiment, when the second driving mode is racing mode, the power battery needs to provide high power output. That is, the output power requirement of the vehicle's power battery is the highest, often requiring the power battery to reach its maximum output power to meet the vehicle's acceleration performance requirements. First, the power battery needs to self-heat to raise its temperature to the optimal operating temperature range to ensure that the battery can cover a large power output. That is, the state of charge (SOC) of the power battery needs to reach a certain value to guarantee the maximum output power of the power battery. However, self-heating is slow and inefficient.

[0044] Therefore, in some optional embodiments, if the second driving mode is a racing driving mode and the SOC of the power battery is less than the first threshold, that is, the current SOC of the power battery is insufficient to guarantee the maximum output power of the power battery, that is, the current SOC of the power battery cannot meet the scenario requirements of the racing driving mode, then it is necessary to charge the power battery through the hydrogen fuel cell and use the waste heat generated by the hydrogen fuel cell to heat the power battery.

[0045] Specifically, when the SOC of the power battery is less than the first threshold, the output power of the hydrogen fuel cell is controlled to the preset output power. It can be understood that when the hydrogen fuel cell is controlled to work at the preset output power, it can not only charge the power battery in time, but also heat the power battery to the target temperature as quickly as possible.

[0046] After operating for a period of time, when the power battery temperature rises to the target temperature and the power battery's SOC exceeds the second threshold, the hydrogen fuel cell is shut down. The first threshold is less than the second threshold. The second threshold is the SOC value required to ensure the power battery outputs maximum power. For example, when the power battery temperature rises to the optimal temperature range and the SOC reaches 50%, the hydrogen fuel cell is shut down.

[0047] Therefore, the technical solution provided in this application embodiment uses hydrogen fuel cells and power batteries in combination, making full use of the advantages of hydrogen fuel cells being able to generate electricity and having an optimal operating temperature higher than that of power batteries. This allows for the charging and heating of power batteries, thereby maximizing the driving range and enhancing the user's driving experience.

[0048] In some optional embodiments, the vehicle control method further includes: When the ambient temperature is lower than the preset ambient temperature, and the driving mode is the first driving mode, the hydrogen fuel cell is controlled to work or shut down according to the SOC of the power battery.

[0049] In a specific embodiment, when the ambient temperature is low and the driving mode is the first driving mode, in order to avoid wasting resources, even if the power battery temperature is low, the power battery will not be heated by the waste heat generated by the hydrogen fuel cell. Instead, the hydrogen fuel cell will be controlled to work or be turned off only according to the power battery's SOC. That is, the hydrogen fuel cell will be controlled to charge the power battery only according to the power battery's SOC.

[0050] It is understandable that the first driving mode includes sport driving mode, economy driving mode and comfort driving mode, and the first driving mode can be understood as a mode that does not require long-distance driving or has a high demand on the output performance of the power battery, such as racing driving mode.

[0051] Therefore, if the first driving mode is short-distance driving, the waste heat generated by the hydrogen fuel cell is used to heat the power battery. The vehicle may have already reached its destination, but the power battery temperature has not yet been heated to the optimal operating temperature range, resulting in a waste of hydrogen fuel cell resources.

[0052] Therefore, in some optional embodiments, when the ambient temperature is lower than a preset ambient temperature and the driving mode is the first driving mode, the hydrogen fuel cell is controlled to operate or shut down according to the SOC of the power battery, including: If the SOC of the power battery is greater than the third threshold, the hydrogen fuel cell will be shut down. If the SOC of the power battery is less than the fourth threshold, the hydrogen fuel cell is controlled to work to charge the power battery; wherein the third threshold is greater than the fourth threshold.

[0053] This can be understood as follows: when the State of Charge (SOC) is greater than the third threshold, the vehicle has a large remaining battery capacity and does not need to be recharged through the hydrogen fuel cell; in this case, the hydrogen fuel cell is turned off. If the SOC is less than the fourth threshold, it indicates that the vehicle's current remaining battery capacity is insufficient to meet the needs of the first driving mode; in this case, the hydrogen fuel cell is controlled to operate to charge the power battery.

[0054] In another optional embodiment, in addition to controlling the hydrogen fuel cell to charge the power battery based on the power battery's SOC when the ambient temperature is lower than the preset ambient temperature and the driving mode is the first driving mode, when the ambient temperature is not lower than the preset ambient temperature or the power battery temperature is not lower than the preset temperature, regardless of the current driving mode of the vehicle, the hydrogen fuel cell is controlled to charge the power battery based on the power battery's SOC.

[0055] Specifically, the vehicle control method provided in this application embodiment further includes: If the power battery temperature is not lower than the preset temperature, or the ambient temperature is not lower than the preset ambient temperature, the operation or shutdown of the hydrogen fuel cell will be controlled according to the power battery's SOC.

[0056] Specifically, under normal operating conditions (i.e., ambient temperature not lower than a preset ambient temperature), the start-up and shutdown of the hydrogen fuel cell are only related to the state of charge (SOC) of the power battery. When the SOC of the power battery is greater than or equal to N1, the hydrogen fuel cell stops working; when the SOC of the power battery is less than or equal to N2, the hydrogen fuel cell starts working to charge the power battery, where N1 > N2.

[0057] The vehicle control method has been described in detail in the above embodiments. This application also provides an embodiment corresponding to a vehicle. The vehicle includes: a hydrogen fuel system, an electric system, a power battery thermal management system, and a controller. The hydrogen fuel system is connected to the electric system, and the heat exchange pipeline of the power battery thermal management system passes through the hydrogen fuel cell in the hydrogen fuel system and the power battery in the electric system. The controller is communicatively connected to the power battery thermal management system, the hydrogen fuel cell, and the power battery, and is used to implement the vehicle control method in the above embodiments.

[0058] Figure 3 This is a schematic diagram of the structure of a power battery thermal management system provided in an embodiment of this application, as shown below. Figure 3 As shown, the thermal management system of the power battery 30 includes: a first three-way valve 33, a second three-way valve 34 and a heat exchanger 32, wherein the first three-way valve 33 includes a first end 1, a second end 2 and a third end 3, and the second three-way valve 34 includes a fourth end 4, a fifth end 5 and a sixth end 6.

[0059] The first end 1 of the first three-way valve 33 is connected to the first connection end of the heat exchanger 32 through a heat exchange tube, the fourth end 4 of the second three-way valve 34 is connected to the second connection end of the heat exchanger 32 through a heat exchange tube, and the heat exchange tube connecting the third and fourth connection ends of the heat exchanger 32 passes through the hydrogen fuel cell 31.

[0060] The heat exchange pipeline connecting the second end 2 of the first three-way valve 33 and the fifth end 5 of the second three-way valve 34 passes through the power battery 30, and the third end 3 of the first three-way valve 33 is connected to the sixth end 6 of the second three-way valve 34.

[0061] The controller is communicatively connected to the first three-way valve 33 and the second three-way valve 34 respectively. When the waste heat generated by the hydrogen fuel cell 31 is needed to heat the power battery 30, the controller controls the first end 1 and the second end 2 of the first three-way valve 33 to be open, and controls the fourth end 4 and the fifth end 5 of the second three-way valve 34 to be open. Heat is exchanged with the high temperature liquid of the hydrogen fuel cell 31 through the heat exchanger 32, and then flows back to the power battery 30 through the second three-way valve 34.

[0062] Of course, when it is not necessary to use the waste heat generated by the hydrogen fuel cell 31 to heat the power battery 30, the controller controls the first end 1 and the third end 3 of the first three-way valve 33 to be open, and controls the fourth end 4 and the sixth end 6 of the second three-way valve 34 to be open.

[0063] In the above embodiments, the vehicle control method has been described in detail. This application also provides an embodiment corresponding to a vehicle control device. It should be noted that this application describes the embodiment of the device from two perspectives: one is based on the functional modules, and the other is based on the hardware structure.

[0064] Figure 4 This is a schematic diagram of the structure of a vehicle control device provided in an embodiment of this application. The vehicle includes a hydrogen fuel system, an electric system connected to the hydrogen fuel system, a power battery thermal management system, and a controller, such as... Figure 4 As shown, the device includes: The acquisition module 40 is used to acquire the power battery temperature and ambient temperature of the power battery in the electric system. The processing module 41 is used to control the hydrogen fuel cell in the hydrogen fuel system to operate when the ambient temperature is lower than a preset ambient temperature, and if the power battery temperature is lower than a preset temperature, and to control the power battery thermal management system to use the waste heat generated by the hydrogen fuel cell to heat the power battery. Furthermore, the vehicle control device provided in this embodiment also includes: The target acquisition module is used to acquire the vehicle's current driving mode and the SOC of the power battery; the driving mode includes a first driving mode and a second driving mode, and the second driving mode includes at least one of a long-distance driving mode and a racing driving mode; The first control module is used to control the output power of the hydrogen fuel cell to P1 when SOC > M1, and to control the hydrogen fuel cell to shut down when the power battery temperature rises to the target temperature; when M2 < SOC ≤ M1, it controls the output power of the hydrogen fuel cell to P2, and to control the hydrogen fuel cell to shut down when the power battery temperature rises to the target temperature; wherein P1 < P2; when SOC ≤ M2, it controls the output power of the hydrogen fuel cell to P3, and to control the hydrogen fuel cell to shut down when the power battery temperature rises to the target temperature and SOC > M1; wherein P2 < P3, and M1 and M2 are different preset SOC values.

[0065] The second control module is used to control the output power of the hydrogen fuel cell to a preset output power when the SOC of the power battery is less than a first threshold; and to control the hydrogen fuel cell to shut down when the power battery temperature rises to a target temperature and the SOC of the power battery is greater than a second threshold; wherein the first threshold is less than the second threshold.

[0066] The third control module is used to control the hydrogen fuel cell to operate or shut down based on the SOC of the power battery when the ambient temperature is lower than the preset ambient temperature and the driving mode is the first driving mode.

[0067] The fourth control module is used to control the hydrogen fuel cell to shut down when the SOC of the power battery is greater than the third threshold, and to control the hydrogen fuel cell to work to charge the power battery when the SOC of the power battery is less than the fourth threshold; wherein the third threshold is greater than the fourth threshold.

[0068] The fifth control module is used to control the operation or shutdown of the hydrogen fuel cell based on the SOC of the power battery when the power battery temperature is not lower than the preset temperature or the ambient temperature is not lower than the preset ambient temperature.

[0069] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0070] Figure 5 This is a schematic diagram of the structure of a vehicle control device provided in another embodiment of this application, as shown below. Figure 5 As shown, the vehicle control unit includes: a memory 50 for storing computer programs; The processor 51 is used to execute a computer program to implement the steps of the vehicle control method as described in the above embodiments.

[0071] The vehicle control device provided in this embodiment may include, but is not limited to, a vehicle controller, a domain controller, or a laptop computer.

[0072] The processor 51 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 51 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 51 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 51 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 51 may also include an Artificial Intelligence (AI) processor, which is used to handle computational operations related to machine learning.

[0073] The memory 50 may include one or more computer-readable storage media, which may be non-transitory. The memory 50 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 50 is used to store at least the following computer program 501, which, after being loaded and executed by the processor 51, is capable of implementing the relevant steps of the vehicle control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 50 may also include an operating system 502 and data 503, and the storage method may be temporary or permanent storage. The operating system 502 may include Windows, Unix, Linux, etc. The data 503 may include, but is not limited to, relevant data involved in the vehicle control method.

[0074] In some embodiments, the vehicle control device may further include a display screen 52, an input / output interface 53, a communication interface 54, a power supply 55, and a communication bus 56.

[0075] Those skilled in the art will understand that Figure 5 The structure shown does not constitute a limitation on the vehicle's control system and may include more or fewer components than illustrated.

[0076] The vehicle control device provided in this application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the vehicle control method described in the above embodiments.

[0077] Finally, this application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps described in the above method embodiments.

[0078] While this specification contains numerous specific implementation details, these should not be construed as limiting the scope of any invention or the scope of the claims, but rather are primarily intended to describe features of specific embodiments of a particular invention. Certain features described in the various embodiments herein may also be implemented in combination in a single embodiment. Conversely, various features described in a single embodiment may also be implemented separately in various embodiments or in any suitable sub-combination. Furthermore, while features may function in certain combinations as described above and even initially claimed in this way, one or more features from a claimed combination may be removed from that combination in some cases, and a claimed combination may refer to a sub-combination or a variation thereof.

[0079] Similarly, although the operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring these operations to be performed in the specific order shown or sequentially, or requiring all illustrated operations to be performed to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Furthermore, the separation of various system modules and components in the above embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0080] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions recited in the claims may be performed in a different order and still achieve the desired result. Furthermore, the processes depicted in the drawings are not necessarily shown in a specific order or sequence to achieve the desired result. In some implementations, multitasking and parallel processing may be advantageous.

[0081] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for controlling a vehicle, the vehicle comprising a hydrogen fuel system, an electric system connected to the hydrogen fuel system, a power battery thermal management system, and a controller, characterized in that, The method includes: Obtain the power battery temperature and ambient temperature of the power battery in the electric system; If the ambient temperature is lower than the preset ambient temperature, and the power battery temperature is lower than the preset temperature, the hydrogen fuel cell in the hydrogen fuel system is controlled to work, and the power battery thermal management system is controlled to use the waste heat generated by the hydrogen fuel cell to heat the power battery. The vehicle's current driving mode and the SOC of the power battery are obtained; the driving mode includes a first driving mode and a second driving mode, the second driving mode includes at least one of a long-distance driving mode and a racing driving mode; the first driving mode is a mode that does not require long-distance driving or has a high demand on the output performance of the power battery, unlike the racing driving mode. Controlling the operation of the hydrogen fuel cell in the hydrogen fuel system includes: When the driving mode is the second driving mode, the output power of the hydrogen fuel cell is controlled according to the SOC of the power battery; When the ambient temperature is lower than the preset ambient temperature, and the driving mode is the first driving mode, the hydrogen fuel cell is controlled to operate or shut down according to the SOC of the power battery.

2. The vehicle control method as described in claim 1, characterized in that, When the second driving mode is the long-distance driving mode, controlling the output power of the hydrogen fuel cell according to the SOC of the power battery includes: If SOC > M1, control the output power of the hydrogen fuel cell to P1, and control the hydrogen fuel cell to shut down when the power battery temperature rises to the target temperature; If M2 < SOC ≤ M1, the output power of the hydrogen fuel cell is controlled to be P2, and the hydrogen fuel cell is controlled to shut down when the power battery temperature rises to the target temperature; wherein, P1 < P2; If SOC≤M2, the output power of the hydrogen fuel cell is controlled to be P3, and when the temperature of the power battery rises to the target temperature and SOC>M1, the hydrogen fuel cell is controlled to shut down; wherein, P2<P3, and M1 and M2 are different preset SOC values.

3. The vehicle control method as described in claim 1, characterized in that, When the second driving mode is the racing driving mode, controlling the output power of the hydrogen fuel cell based on the SOC of the power battery includes: When the SOC of the power battery is less than a first threshold, the output power of the hydrogen fuel cell is controlled to a preset output power. When the power battery temperature rises to the target temperature and the state of charge (SOC) of the power battery is greater than the second threshold, the hydrogen fuel cell is controlled to shut down; wherein the first threshold is less than the second threshold.

4. The vehicle control method as described in claim 1, characterized in that, The step of controlling the hydrogen fuel cell to operate or shut down based on the SOC of the power battery includes: If the SOC of the power battery is greater than the third threshold, the hydrogen fuel cell is controlled to shut down; If the SOC of the power battery is less than the fourth threshold, the hydrogen fuel cell is controlled to operate to charge the power battery; wherein the third threshold is greater than the fourth threshold.

5. The vehicle control method as described in claim 1, characterized in that, The method further includes: If the temperature of the power battery is not lower than the preset temperature, or the ambient temperature is not lower than the preset ambient temperature, the operation or shutdown of the hydrogen fuel cell is controlled according to the SOC of the power battery.

6. A vehicle, characterized in that, The vehicle includes: a hydrogen fuel system, an electric system, a power battery thermal management system, and a controller; The hydrogen fuel system is connected to the electric system, and the heat exchange pipeline of the power battery thermal management system passes through the hydrogen fuel cell in the hydrogen fuel system and the power battery in the electric system. The controller is communicatively connected to the power battery thermal management system, the hydrogen fuel cell, and the power battery, respectively, and is used to implement the vehicle control method according to any one of claims 1-5.

7. The vehicle as described in claim 6, characterized in that, The power battery thermal management system includes: a first three-way valve, a second three-way valve, and a heat exchanger, wherein the first three-way valve includes a first end, a second end, and a third end, and the second three-way valve includes a fourth end, a fifth end, and a sixth end; The first end of the first three-way valve is connected to the first connection end of the heat exchanger through a heat exchange tube, the fourth end of the second three-way valve is connected to the second connection end of the heat exchanger through a heat exchange tube, and the heat exchange tube connecting the third and fourth connection ends of the heat exchanger passes through the hydrogen fuel cell. The heat exchange pipeline connecting the second end of the first three-way valve and the fifth end of the second three-way valve passes through the power battery, and the third end of the first three-way valve is connected to the sixth end of the second three-way valve. The controller is communicatively connected to the first three-way valve and the second three-way valve, respectively.

8. A control device for a vehicle, the vehicle comprising a hydrogen fuel system, an electric system connected to the hydrogen fuel system, a power battery thermal management system, and a controller, the control device being applied to the control method of the vehicle according to any one of claims 1 to 5, characterized in that, The control device includes: The acquisition module is used to acquire the power battery temperature and ambient temperature of the power battery in the electric system. The processing module is used to control the hydrogen fuel cell in the hydrogen fuel system to operate when the ambient temperature is lower than the preset ambient temperature and the power battery temperature is lower than the preset temperature, and to control the power battery thermal management system to use the waste heat generated by the hydrogen fuel cell to heat the power battery.

9. A vehicle control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the vehicle control method according to any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the vehicle control method according to any one of claims 1 to 5.

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