Battery output power control method, device and medium for hydrogen fuel cell vehicle

Abstract

The present application provides a method, device and medium for controlling the battery output power of a hydrogen fuel cell vehicle, the method comprising: obtaining the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle; when the current coolant temperature is lower than a preset coolant temperature threshold, determining the first vehicle driving state of the hydrogen fuel cell vehicle; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state; if the first vehicle driving state is an accelerated driving state, obtaining the first vehicle request power corresponding to the first vehicle driving state; based on the first vehicle request power, determining the first output power of the fuel cell and the second output power of the power battery in a manner that the output power of the fuel cell is increased preferentially; the sum of the first output power and the second output power is equal to the first vehicle request power. Determining the first output power of the fuel cell and the second output power of the power battery according to the present method can reduce resource waste on the basis of being able to meet the first vehicle request power.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a method and device for controlling battery output power of a hydrogen fuel cell vehicle, a hydrogen fuel cell vehicle, and a computer-readable storage medium. Background Art

[0002] With the rapid development of vehicle technology, hydrogen fuel cell vehicles have been widely used. Hydrogen fuel cell vehicles generally use two power sources, fuel cells and power batteries, working together; the fuel cell ensures the range of hydrogen fuel cell vehicles, and the power battery is used for rapid power response and energy recovery. When the power demand of hydrogen fuel cell vehicles decreases, that is, the power request of the entire vehicle decreases, the fuel cell stack continues to charge the power battery at the lowest operating power during the collaborative work of the fuel cell and the power battery, which will cause power loss in the fuel cell of the hydrogen fuel cell vehicle and cause waste of resources.

[0003] Therefore, how to control the battery output power of hydrogen fuel cell vehicles to reduce resource waste while meeting the power request of the entire vehicle is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0004] The purpose of the present application is to provide a method, device, terminal equipment, computer-readable storage medium and computer program product for controlling the battery output power of a hydrogen fuel cell vehicle, which can reduce resource waste while meeting the power request of the entire vehicle.

[0005] In a first aspect, the present application provides a method for controlling battery output power of a hydrogen fuel cell vehicle.

[0006] The method comprises:

[0007] Get the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle;

[0008] When the current coolant temperature is lower than a preset coolant temperature threshold, determining a first vehicle driving state of the hydrogen fuel cell vehicle; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state;

[0009] If the first vehicle driving state is an accelerating driving state, obtaining a first vehicle requested power corresponding to the first vehicle driving state;

[0010] Based on the first vehicle requested power, the first output power of the fuel cell and the second output power of the power battery are determined in a manner that prioritizes increasing the output power of the fuel cell; the sum of the first output power and the second output power is equal to the first vehicle requested power.

[0011] In one embodiment, determining the first output power of the fuel cell and the second output power of the power battery in a manner of preferentially increasing the output power of the fuel cell based on the first vehicle requested power includes:

[0012] determining a maximum output power of the fuel cell under the first vehicle driving state;

[0013] If the maximum output power is greater than or equal to the first vehicle requested power, determining the first output power of the fuel cell to be the first vehicle requested power;

[0014] If the maximum output power is less than the first vehicle requested power, the first output power of the fuel cell is determined to be the maximum output power, and the second output power of the power battery is determined according to the power difference between the first vehicle requested power and the first output power.

[0015] In one embodiment, the method further comprises:

[0016] If the first vehicle driving state is a charging state, determining a current battery power of the power battery;

[0017] The first output power of the fuel cell is determined according to the current battery power, the upper limit value of the charging power of the power battery and the maximum recoverable power of the power battery.

[0018] In one embodiment, determining the first output power of the fuel cell according to the current battery power, the upper limit of the charging power of the power battery and the maximum recoverable power of the power battery includes:

[0019] If the current battery power is less than the upper limit of the charging power of the power battery, determining the preset output power of the fuel cell;

[0020] When the preset output power meets a preset setting condition, determining the first output power of the fuel cell to be the preset output power;

[0021] Otherwise, the first output power of the fuel cell is determined to be 0 KW.

[0022] In one embodiment, when the preset output power satisfies a preset setting condition, determining the first output power of the fuel cell to be the preset output power includes:

[0023] Determining a charging power difference between the maximum recoverable power of the power battery and the maximum recoverable power of the motor;

[0024] If the preset output power is less than the charging power difference, the first output power of the fuel cell is determined to be the preset output power.

[0025] In one embodiment, the method further comprises:

[0026] When the current coolant temperature is greater than or equal to a preset coolant temperature threshold, determining a second vehicle driving state of the hydrogen fuel cell vehicle;

[0027] If the second vehicle driving state is an accelerating driving state, obtaining a second vehicle requested power corresponding to the second vehicle driving state;

[0028] Based on the second vehicle requested power, the first output power of the fuel cell and the second output power of the power battery are determined in a manner that prioritizes increasing the output power of the power battery; the sum of the first output power and the second output power is equal to the vehicle requested power.

[0029] In one embodiment, the method further comprises:

[0030] If the second vehicle driving state is a charging state, the first output power of the fuel cell is determined to be 0 kW, and the power battery is charged through the vehicle body electronic stability system.

[0031] In a second aspect, the present application also provides a battery output power control device for a hydrogen fuel cell vehicle. The device comprises:

[0032] A temperature acquisition module, used to acquire the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle;

[0033] A state determination module, used to determine a first vehicle driving state of the hydrogen fuel cell vehicle when the current coolant temperature is lower than a preset coolant temperature threshold; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state;

[0034] a power acquisition module, configured to acquire a first vehicle requested power corresponding to the first vehicle driving state if the first vehicle driving state is an accelerated driving state;

[0035] A power determination module is used to determine the first output power of the fuel cell and the second output power of the power battery in a manner that prioritizes increasing the output power of the fuel cell based on the first vehicle request power; the sum of the first output power and the second output power is equal to the first vehicle request power.

[0036] In a third aspect, the present application further provides a terminal device, wherein the terminal device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0037] In a fourth aspect, the present application also provides a hydrogen fuel cell vehicle, which includes a hydrogen fuel cell vehicle body and a controller, and the controller executes the steps of the above method.

[0038] In a fifth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0039] The present application provides a method for controlling battery output power of a hydrogen fuel cell vehicle. The method is to determine a first output power of the fuel cell and a second output power of the power battery in a manner of preferentially increasing the output power of the fuel cell when it is determined that the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle is lower than a preset coolant temperature threshold and the first vehicle driving state is an accelerated driving state, wherein the sum of the first output power and the second output power is equal to a first vehicle request power corresponding to the first vehicle driving state, that is, the sum of the first output power of the fuel cell and the second output power of the power battery can meet the first vehicle request power corresponding to the first vehicle driving state; and since preferentially increasing the first output power of the fuel cell can enable the fuel cell to generate heat energy efficiently and quickly, the current coolant temperature of the fuel cell can be quickly increased, so that the fuel cell can reach the minimum temperature for entering a hot standby state more quickly to enter a hot standby state, thereby avoiding the fuel cell from continuously charging the power battery. Therefore, determining the first output power of the fuel cell and the second output power of the power battery according to the present method can reduce resource waste on the basis of being able to meet the first vehicle request power.

[0040] It can be understood that the battery output power control device, terminal equipment, hydrogen fuel cell vehicle and computer-readable storage medium of a hydrogen fuel cell vehicle provided in the embodiments of the present application have the same beneficial effects as the battery output power control method of the hydrogen fuel cell vehicle mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A flow chart of a method for controlling battery output power of a hydrogen fuel cell vehicle provided in an embodiment of the present application;

[0043] Figure 2 A flow chart of another method for controlling battery output power of a hydrogen fuel cell vehicle provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a battery output power control device for a hydrogen fuel cell vehicle provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0047] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0048] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0049] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0050] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0051] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means "two or more".

[0052] A method for controlling battery output power of a hydrogen fuel cell vehicle provided in an embodiment of the present application can be executed by a vehicle controller of the hydrogen fuel cell vehicle when running a corresponding computer program, or can be executed by a processor of a terminal device when running a corresponding computer program.

[0053] Figure 1 This is a flow chart of a method for controlling battery output power of a hydrogen fuel cell vehicle provided in an embodiment of the present application. For ease of explanation, only the part related to the present embodiment is shown. The method provided in the present embodiment includes the following steps:

[0054] S100: Acquire the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle.

[0055] Among them, hydrogen fuel cell vehicles refer to new energy vehicles that use fuel cells and power batteries to work together; the current coolant temperature refers to the temperature of the coolant of the fuel cell at the moment of detection; the current coolant temperature of the fuel cell can be obtained through the battery management system.

[0056] It should be noted that when the fuel cell is working, hydrogen and air enter the anode (negative electrode) and cathode (positive electrode) of the fuel cell respectively; at the anode of the fuel cell, hydrogen loses electrons to generate hydrogen ions, and at the cathode of the fuel cell, oxygen gains electrons to generate oxygen ions; hydrogen ions pass through the proton exchange membrane from the anode of the fuel cell to the cathode and generate water with oxygen ions. In the whole process of gaining and losing electrons, heat energy will be generated, causing the temperature of the coolant inside the fuel cell to rise rapidly.

[0057] S200: When the current coolant temperature is lower than a preset coolant temperature threshold, determining a first vehicle driving state of the hydrogen fuel cell vehicle; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state.

[0058] Among them, the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter the hot standby state. The hot standby state refers to the state where the fuel cell is in operation, but the output power is 0KW. In other words, when the fuel cell is in the hot standby state, the output power of the fuel cell is 0KW, and the power battery is stopped from being charged, thereby avoiding waste of resources and ensuring that the fuel cell is always kept within the optimal temperature range.

[0059] Specifically, after obtaining the current coolant temperature, the preset coolant temperature threshold of the fuel cell is obtained, and the current coolant temperature and the preset coolant temperature threshold are compared; if the current coolant temperature is lower than the preset coolant temperature threshold, the first vehicle driving state of the hydrogen fuel cell vehicle is further determined. The first vehicle driving state refers to the vehicle driving state corresponding to the hydrogen fuel cell vehicle when the current coolant temperature is lower than the preset coolant temperature threshold; the first vehicle driving state includes an accelerated driving state and a charging state.

[0060] Specifically, the first vehicle driving state of the hydrogen fuel cell vehicle may be determined based on the vehicle speed information, the accelerator pedal signal, and the remaining power of the power battery (also known as the state of charge, SOC) of the hydrogen fuel cell vehicle.

[0061] S300: If the first vehicle driving state is an accelerating driving state, obtain a first vehicle requested power corresponding to the first vehicle driving state.

[0062] Specifically, if it is determined that the driving state of the first vehicle is an accelerated driving state, it means that at this time, a fuel cell and / or a power battery is needed to provide power for the hydrogen fuel cell vehicle to meet the power requirements of the hydrogen fuel cell vehicle. Therefore, the first vehicle request power corresponding to the driving state of the first vehicle is obtained.

[0063] In actual operation, the size of the first vehicle power request is related to the vehicle configuration of the hydrogen fuel cell vehicle and the force of stepping on the accelerator; generally speaking, the greater the force of stepping on the accelerator, the greater the acceleration, and the greater the first vehicle power request of the hydrogen fuel cell vehicle; conversely, the smaller the force of stepping on the accelerator, the smaller the acceleration, and the smaller the first vehicle power request of the hydrogen fuel cell vehicle.

[0064] S400: Based on the first vehicle requested power, determine the first output power of the fuel cell and the second output power of the power battery in a manner of giving priority to increasing the output power of the fuel cell; the sum of the first output power and the second output power is equal to the first vehicle requested power.

[0065] Specifically, after obtaining the first vehicle requested power, the first output power of the fuel cell and the second output power of the power battery are determined based on the first vehicle requested power, and the sum of the first output power and the second output power is equal to the first vehicle requested power. In this step, the first output power of the fuel cell and the second output power of the power battery are determined in a manner of giving priority to increasing the output power of the fuel cell, that is, the maximum output power of the fuel cell is preferentially used as its first output power.

[0066] The embodiment of the present application provides a battery output power control method for a hydrogen fuel cell vehicle. The method is to determine the first output power of the fuel cell and the second output power of the power battery in a manner of preferentially increasing the output power of the fuel cell when it is determined that the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle is lower than a preset coolant temperature threshold and the first vehicle driving state is an accelerated driving state, the sum of the first output power and the second output power is equal to the first vehicle request power corresponding to the first vehicle driving state, that is, the sum of the first output power of the fuel cell and the second output power of the power battery can meet the first vehicle request power corresponding to the first vehicle driving state; and because preferentially increasing the first output power of the fuel cell can enable the fuel cell to generate heat energy efficiently and quickly, and quickly increase the current coolant temperature of the fuel cell, so that the fuel cell can reach the minimum temperature that can enter the hot standby state more quickly to enter the hot standby state, thereby avoiding the fuel cell from continuously charging the power battery. Therefore, determining the first output power of the fuel cell and the second output power of the power battery according to the method can reduce resource waste on the basis of being able to meet the first vehicle request power.

[0067] On the basis of the above embodiment, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, based on the first vehicle request power, the first output power of the fuel cell and the second output power of the power battery are determined in a manner of giving priority to increasing the output power of the fuel cell, including:

[0068] determining a maximum output power of the fuel cell in a first vehicle driving state;

[0069] If the maximum output power is greater than or equal to the first vehicle requested power, determining the first output power of the fuel cell as the first vehicle requested power;

[0070] If the maximum output power is less than the first vehicle requested power, the first output power of the fuel cell is determined to be the maximum output power, and the second output power of the power battery is determined according to the power difference between the first vehicle requested power and the first output power.

[0071] Specifically, after determining that the first vehicle driving state of the hydrogen fuel cell vehicle is the accelerated driving state, the maximum output power of the fuel cell in the first vehicle driving state is first determined, and then the maximum output power and the first vehicle requested power are compared; if the maximum output power is greater than or equal to the first vehicle requested power, it means that the first output power of the fuel cell can meet the first vehicle requested power of the hydrogen fuel cell vehicle, and the fuel cell is used alone to provide the first vehicle requested power for the hydrogen fuel cell vehicle, that is, the first output power of the fuel cell is determined to be the first vehicle requested power; if the maximum output power is less than the first vehicle requested power, it means that even if the fuel cell outputs at its maximum output power, it cannot reach the first vehicle requested power of the hydrogen fuel cell vehicle, and therefore, on the basis of taking the maximum output power of the fuel cell as the first output power, the power difference between the first vehicle requested power and the first output power is calculated, and the second output power of the power battery is determined based on the power difference.

[0072] It can be seen that according to the method of this embodiment, when the current coolant temperature is lower than the preset coolant temperature threshold and the first vehicle driving state is an accelerated driving state, the first output power of the fuel cell and the second output power of the power battery can be determined efficiently and conveniently.

[0073] Based on the above embodiments, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, a method for controlling battery output power of a hydrogen fuel cell vehicle further includes:

[0074] If the driving state of the first vehicle is a charging state, determining a current battery power of the power battery;

[0075] The first output power of the fuel cell is determined according to the current battery power, the upper limit value of the charging power of the power battery and the maximum recoverable power of the power battery.

[0076] Among them, the first vehicle driving state is the charging state, which means that the power battery is currently charged by the fuel cell and / or the motor, and the second output power of the power battery is 0KW at this time; the first output power of the fuel cell is the power for charging the power battery.

[0077] Among them, the current battery power of the power battery is the remaining power of the power battery; the upper limit value of the charging power of the power battery refers to the maximum value of the charging power of the power battery; the maximum recoverable power of the power battery refers to the maximum power that the power battery can recover when charging the power battery.

[0078] Specifically, when the first vehicle driving state is a charging state, whether the power battery needs to be charged is determined according to the current battery power and the upper limit of the charging power of the power battery; and the first output power of the fuel cell is determined according to the maximum recoverable power of the power battery.

[0079] It can be seen that according to the method of this embodiment, the first output power of the fuel cell can be accurately determined.

[0080] In a specific embodiment, determining the first output power of the fuel cell according to the current battery power, the upper limit of the charging power of the power battery and the maximum recoverable power of the power battery includes:

[0081] If the current battery power is less than the upper limit of the power battery charge, the preset output power of the fuel cell is determined;

[0082] When the preset output power meets the preset setting condition, determining the first output power of the fuel cell to be the preset output power;

[0083] Otherwise, the first output power of the fuel cell is determined to be 0 kW.

[0084] The preset output power of the fuel cell may be the minimum output power or the optimal output power of the fuel cell, and may be set according to actual needs. This embodiment does not limit the specific value of the preset output power.

[0085] Specifically, first compare the current battery power of the power battery and the upper limit of the charging power of the power battery; if the current battery power is less than the upper limit of the charging power of the power battery, it means that the power battery needs to be charged, so further judge whether the preset output power meets the preset setting conditions; if the preset output power meets the preset setting conditions, determine that the first output power of the fuel cell is the preset output power; otherwise, determine that the first output power of the fuel cell is 0KW.

[0086] In a specific embodiment, a power protection range value may be further obtained, that is, a power range set to prevent the power battery from being overcharged. In actual operation, the power protection range value may be set according to actual needs, and this embodiment does not limit this. Correspondingly, when determining whether the power battery needs to be charged, the power threshold difference corresponding to the charging power upper limit value of the power battery and the power protection range value is calculated. If the current battery power of the power battery is less than the power threshold difference, indicating that the power battery needs to be charged, the first output power of the fuel cell is determined to be the preset output power; otherwise, that is, the current battery power is greater than or equal to the power threshold difference, indicating that the power battery does not need to be charged, and therefore the first output power of the fuel cell is determined to be 0KW.

[0087] It can be seen that according to the method of this embodiment, the first output power of the fuel cell can be determined conveniently and accurately.

[0088] In a specific embodiment, when the preset output power meets the preset setting condition, determining the first output power of the fuel cell as the preset output power includes:

[0089] Determine the charging power difference between the maximum recoverable power of the power battery and the maximum recoverable power of the motor;

[0090] If the preset output power is less than the charging power difference, the first output power of the fuel cell is determined to be the preset output power.

[0091] The maximum recoverable power of the motor refers to the maximum power that the motor can generate to charge the power battery. In actual operation, it can be calculated by the Electronic Stability Program (ESP) or the Vehicle Controlle Unit (VCU) of a pure electric vehicle.

[0092] Specifically, first calculate the difference between the maximum recoverable power of the power battery and the maximum recoverable power of the motor to obtain the charging power difference; then compare the size relationship between the preset output power and the charging power difference; if the preset output power is less than the charging power difference, it means that the preset output power meets the preset setting conditions, then determine that the first output power of the fuel cell is the preset output power, that is, the fuel cell charges the power battery with the preset output power; if the preset output power is greater than or equal to the charging power difference, it means that the preset output power does not meet the preset setting conditions, then determine that the first output power of the fuel cell is 0KW.

[0093] It can be seen that according to the method of this embodiment, whether the preset output power meets the preset setting conditions is determined based on whether the preset output power is less than the charging power difference. The judgment method is efficient and convenient, and can accurately determine the first output power of the corresponding fuel cell.

[0094] Based on the above embodiments, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, a method for controlling battery output power of a hydrogen fuel cell vehicle further includes:

[0095] When the current coolant temperature is greater than or equal to a preset coolant temperature threshold, determining a second vehicle driving state of the hydrogen fuel cell vehicle;

[0096] If the second vehicle driving state is an accelerating driving state, obtaining a second vehicle requested power corresponding to the second vehicle driving state;

[0097] Based on the second vehicle requested power, the first output power of the fuel cell and the second output power of the power battery are determined in a manner that prioritizes increasing the output power of the power battery; the sum of the first output power and the second output power is equal to the vehicle requested power.

[0098] Among them, the second vehicle driving state refers to the vehicle driving state corresponding to the hydrogen fuel cell vehicle when the current coolant temperature is greater than or equal to the preset coolant temperature threshold; the second vehicle driving state includes the acceleration driving state and the charging state.

[0099] Specifically, the second vehicle driving state of the hydrogen fuel cell vehicle can also be determined based on the vehicle speed information, the accelerator pedal signal and the remaining power of the power battery (also known as the state of charge, SOC) of the hydrogen fuel cell vehicle.

[0100] If the second vehicle driving state is an accelerated driving state, it means that at this time, the fuel cell and / or the power battery is needed to provide power to the hydrogen fuel cell vehicle to meet the power demand of the hydrogen fuel cell vehicle; and because the current coolant temperature is greater than or equal to the preset coolant temperature threshold, it means that the fuel cell can enter a thermal cooling state, and therefore power is provided to the hydrogen fuel cell vehicle in a manner that prioritizes increasing the output power of the power battery.

[0101] Specifically, a second vehicle requested power corresponding to the driving state of the second vehicle is obtained; based on the second vehicle requested power, a first output power of the fuel cell and a second output power of the power battery are determined in a manner that prioritizes increasing the output power of the power battery; the sum of the first output power and the second output power is equal to the vehicle requested power.

[0102] In actual operation, the size of the second vehicle's requested power is related to the vehicle configuration of the hydrogen fuel cell vehicle and the force of stepping on the accelerator; generally speaking, the greater the force of stepping on the accelerator, the greater the acceleration, and the greater the second vehicle's requested power of the hydrogen fuel cell vehicle; conversely, the smaller the force of stepping on the accelerator, the smaller the acceleration, and the smaller the first vehicle's requested power of the hydrogen fuel cell vehicle.

[0103] More specifically, after determining that the second vehicle driving state of the hydrogen fuel cell vehicle is the accelerated driving state, first determine the second vehicle request power of the hydrogen fuel cell vehicle in the second vehicle driving state and the maximum output power of the power battery in the second vehicle driving state; then compare the magnitude relationship between the maximum output power and the second vehicle request power; if the maximum output power is greater than or equal to the second vehicle request power, since the fuel cell can enter the hot standby state at this time, the power battery is used alone to provide the second vehicle request power for the hydrogen fuel cell vehicle, that is, the second output power of the power battery is determined to be the second vehicle request power, and the first output power of the fuel cell is 0KW; if the maximum output power is less than the second vehicle request power, it means that even if the power battery outputs at its maximum output power, it cannot reach the second vehicle request power of the hydrogen fuel cell vehicle, so on the basis of taking the maximum output power of the power battery as the second output power, calculate the power difference between the first vehicle request power and the second output power, and determine the power difference as the first output power of the fuel cell.

[0104] It can be seen that according to the method of this embodiment, when the current coolant temperature is greater than or equal to the preset coolant temperature threshold and the second vehicle driving state is an accelerated driving state, the first output power of the fuel cell and the second output power of the power battery can be determined efficiently and conveniently.

[0105] Based on the above embodiments, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, a method for controlling battery output power of a hydrogen fuel cell vehicle further includes:

[0106] If the second vehicle driving state is a charging state, the first output power of the fuel cell is determined to be 0 kW, and the power battery is charged through the vehicle body electronic stability system.

[0107] Specifically, when the current coolant temperature is greater than or equal to the preset coolant temperature threshold and the second vehicle driving state is the charging state, it means that the current coolant temperature of the fuel cell has reached the minimum temperature that can enter the hot standby state, that is, the fuel cell can enter the hot cooling state, and the power battery does not need to output power to the outside in the charging state, so the first output power of the fuel cell is determined to be 0KW. Among them, the electronic stability program (ESP) refers to a general term for a system or program that can effectively prevent the car from losing control when it reaches its dynamic limit while improving the handling performance of the vehicle. In this embodiment, the motor is deployed to run through the electronic stability system of the vehicle to use the power generated by the motor to charge the power battery.

[0108] It can be seen that according to the method of this embodiment, the power battery can be charged through the vehicle body electronic stability system on the basis of saving the power consumption of the fuel cell.

[0109] Figure 2 A flowchart of another method for controlling the battery output power of a hydrogen fuel cell vehicle provided in an embodiment of the present application. In order to enable personnel in the technical field to better understand the technical solution in the present application, the technical solution in the embodiment of the present application is described in detail below in combination with actual application scenarios. In an embodiment of the present application, the specific steps of a method for controlling the battery output power of a hydrogen fuel cell vehicle are as follows:

[0110] The vehicle controller of the hydrogen fuel cell vehicle obtains the current coolant temperature T0 of the fuel cell;

[0111] Determine a preset coolant temperature threshold T1 corresponding to the fuel cell being able to enter a hot standby state;

[0112] Compare the current coolant temperature T0 with the preset coolant temperature threshold T1;

[0113] If the current coolant temperature T0 is less than the preset coolant temperature threshold T1, determining a first vehicle driving state of the hydrogen fuel cell vehicle;

[0114] If the driving state of the first vehicle is an accelerating driving state, obtaining a first vehicle requested power W0 of the hydrogen fuel cell vehicle;

[0115] Determine whether the maximum output power W1 of the fuel cell under the first vehicle driving state is greater than or equal to the first vehicle requested power W0;

[0116] If so, that is, W1≥W0, the first output power of the fuel cell is determined to be the first vehicle requested power W0, and the second output power of the power battery is determined to be 0KW;

[0117] Otherwise, that is, W1<W0, the first output power of the fuel cell is determined to be the maximum output power W1, and the second output power of the power battery is determined to be W2=W0-W1;

[0118] If the driving state of the first vehicle is a charging state, the second output power of the power battery is 0KW;

[0119] Determine the current battery capacity SOC1 of the power battery;

[0120] Calculate the power threshold difference between the charging power upper limit value SOC2 and the power protection range value SOC3 of the power battery;

[0121] Determine whether the current battery power SOC1 of the power battery is less than the power threshold difference; if so, that is, SOC1<SOC2-SOC3, determine the preset output power Wp of the fuel cell, calculate the charging power difference between the maximum recoverable power Wb of the power battery and the maximum recoverable power W3 of the motor; determine whether the preset output power Wp of the fuel cell is less than the charging power difference;

[0122] If yes, that is, Wp<Wb-W3, the first output power of the fuel cell is determined to be the preset output power Wp, that is, the fuel cell charges the power battery with the preset output power;

[0123] If the current battery power SOC1 of the power battery is not less than the power threshold difference, that is, SOC1≥SOC2-SOC3; or the preset output power Wp of the fuel cell is not less than the charging power difference, that is, Wp≥Wb-W3, then the first output power of the fuel cell is determined to be 0KW, that is, the fuel cell can enter the hot standby state.

[0124] If the current coolant temperature T0 ≥ the preset coolant temperature threshold T1, determining the second vehicle driving state of the hydrogen fuel cell vehicle;

[0125] If the second vehicle driving state is an accelerating driving state, obtaining a second vehicle requested power Q0 of the hydrogen fuel cell vehicle;

[0126] Determine whether the maximum output power Q1 of the power battery in the second vehicle driving state is greater than or equal to the second vehicle requested power Q0;

[0127] If yes, that is, Q1≥Q0, the second output power of the power battery is determined to be the first vehicle requested power Q0, the first output power of the fuel cell is 0KW, and the hot standby state is entered;

[0128] Otherwise, that is, Q1<Q0, the second output power of the power battery is determined to be the maximum output power Q1, and the first output power of the fuel cell is determined to be Q2=Q0-Q1;

[0129] If the second vehicle driving state is a charging state, the first output power of the fuel cell is 0 kW, and the power battery is charged through the vehicle body electronic stability system.

[0130] The present application provides a method for controlling battery output power of a hydrogen fuel cell vehicle. The method is to determine a first output power of the fuel cell and a second output power of the power battery in a manner of preferentially increasing the output power of the fuel cell when it is determined that the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle is lower than a preset coolant temperature threshold and the first vehicle driving state is an accelerated driving state, wherein the sum of the first output power and the second output power is equal to a first vehicle request power corresponding to the first vehicle driving state, that is, the sum of the first output power of the fuel cell and the second output power of the power battery can meet the first vehicle request power corresponding to the first vehicle driving state; and since preferentially increasing the first output power of the fuel cell can enable the fuel cell to generate heat energy efficiently and quickly, the current coolant temperature of the fuel cell can be quickly increased, so that the fuel cell can reach the minimum temperature for entering a hot standby state more quickly to enter a hot standby state, thereby avoiding the fuel cell from continuously charging the power battery. Therefore, determining the first output power of the fuel cell and the second output power of the power battery according to the present method can reduce resource waste on the basis of being able to meet the first vehicle request power.

[0131] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0132] Figure 3 FIG. 1 is a schematic diagram of a battery output power control device for a hydrogen fuel cell vehicle provided in an embodiment of the present application. Figure 3 As shown, the battery output power control device of the hydrogen fuel cell vehicle of this embodiment includes a temperature acquisition module 301, a state determination module 302, a power acquisition module 303 and a power determination module 304; wherein,

[0133] The temperature acquisition module 301 is used to acquire the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle;

[0134] The first state determination module 302 is used to determine the first vehicle driving state of the hydrogen fuel cell vehicle when the current coolant temperature is lower than a preset coolant temperature threshold; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state;

[0135] A first power acquisition module 303 is used to acquire a first vehicle requested power corresponding to the first vehicle driving state if the first vehicle driving state is an accelerated driving state;

[0136] The first power determination module 304 is used to determine the first output power of the fuel cell and the second output power of the power battery in a manner of giving priority to increasing the output power of the fuel cell based on the first vehicle requested power; the sum of the first output power and the second output power is equal to the first vehicle requested power.

[0137] A battery output power control device for a hydrogen fuel cell vehicle provided in an embodiment of the present application has the same beneficial effects as the battery output power control method for a hydrogen fuel cell vehicle described above.

[0138] In one embodiment, the first power determination module 304 includes:

[0139] A first determination submodule, used to determine the maximum output power of the fuel cell in the first vehicle driving state;

[0140] A second determination submodule is used to determine the first output power of the fuel cell as the first vehicle requested power if the maximum output power is greater than or equal to the first vehicle requested power;

[0141] The third determination submodule is used to determine the first output power of the fuel cell as the maximum output power if the maximum output power is less than the first vehicle request power, and determine the second output power of the power battery according to the power difference between the first vehicle request power and the first output power.

[0142] In one embodiment, a battery output power control device for a hydrogen fuel cell vehicle further includes:

[0143] A power determination module, used to determine the current battery power of the power battery if the driving state of the first vehicle is a charging state;

[0144] The first output determination module is used to determine the first output power of the fuel cell according to the current battery power, the upper limit value of the charging power of the power battery and the maximum recoverable power of the power battery.

[0145] In one embodiment, the first output determination module includes:

[0146] The fourth determination submodule is used to determine the preset output power of the fuel cell if the current battery power is less than the upper limit of the charging power of the power battery;

[0147] The fifth determination submodule is used to determine that the first output power of the fuel cell is the preset output power when the preset output power meets the preset setting condition; otherwise, determine that the first output power of the fuel cell is 0KW.

[0148] In one embodiment, the fifth determining submodule includes:

[0149] A first determining unit, used to determine a charging power difference between a maximum recoverable power of the power battery and a maximum recoverable power of the motor;

[0150] The second determining unit is used to determine that the first output power of the fuel cell is the preset output power if the preset output power is less than the charging power difference.

[0151] In one embodiment, a battery output power control device for a hydrogen fuel cell vehicle further includes:

[0152] A second state determination module, used to determine a second vehicle driving state of the hydrogen fuel cell vehicle when the current coolant temperature is greater than or equal to a preset coolant temperature threshold;

[0153] A second power acquisition module, configured to acquire a second vehicle requested power corresponding to the second vehicle driving state if the second vehicle driving state is an accelerated driving state;

[0154] The second power determination module is used to determine the first output power of the fuel cell and the second output power of the power battery in a manner of giving priority to increasing the output power of the power battery based on the second vehicle request power; the sum of the first output power and the second output power is equal to the vehicle request power.

[0155] In one embodiment, a battery output power control device for a hydrogen fuel cell vehicle further includes:

[0156] The second output determination module is used to determine that the first output power of the fuel cell is 0KW if the driving state of the second vehicle is a charging state, and to charge the power battery through the vehicle body electronic stability system.

[0157] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0158] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0159] Figure 4 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. Figure 4 As shown, the terminal device 400 of this embodiment includes a memory 401, a processor 402, and a computer program 403 stored in the memory 401 and executable on the processor 402; when the processor 402 executes the computer program 403, the steps in the above-mentioned battery output power control method embodiments of the hydrogen fuel cell vehicle are implemented, such as Figure 1 S100 to S400 shown; or when the processor 402 executes the computer program 403, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 2 The functions of the temperature acquisition module, state determination module, power acquisition module and power determination module are shown.

[0160] Exemplarily, the computer program 403 may be divided into one or more modules / units, one or more modules / units are stored in the memory 401, and are executed by the processor 402 to implement the method of the embodiment of the present application. One or more modules / units may be a series of computer program instruction segments that can perform specific functions, and the instruction segments are used to describe the execution process of the computer program 403 in the terminal device 400. For example, the computer program 403 may be divided into a temperature acquisition module, a state determination module, a power acquisition module, and a power determination module, and the specific functions of each module are as follows:

[0161] A temperature acquisition module, used to acquire the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle;

[0162] A state determination module, used to determine a first vehicle driving state of the hydrogen fuel cell vehicle when the current coolant temperature is lower than a preset coolant temperature threshold; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state;

[0163] A power acquisition module, configured to acquire a first vehicle requested power corresponding to the first vehicle driving state if the first vehicle driving state is an accelerated driving state;

[0164] The power determination module is used to determine the first output power of the fuel cell and the second output power of the power battery in a manner of giving priority to increasing the output power of the fuel cell based on the first vehicle request power; the sum of the first output power and the second output power is equal to the first vehicle request power.

[0165] In application, the terminal device 400 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device 400 may include but is not limited to a memory 401 and a processor 402. Those skilled in the art will appreciate that Figure 4 It is only an example of a terminal device and does not constitute a limitation of the terminal device. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.; among which, the input and output devices may include cameras, audio acquisition / playback devices, display screens, etc.; the network access device may include a communication module for wireless communication with external devices.

[0166] In applications, the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0167] In applications, the memory can be an internal storage unit of a terminal device, such as a hard disk or memory of the terminal device; it can also be an external storage device of the terminal device, such as a plug-in hard disk equipped on the terminal device, a smart media card (SMC), a secure digital (SD) card, a flash card, etc.; it can also include both the internal storage unit and the external storage device of the terminal device. The memory is used to store operating systems, applications, boot loaders, data, and other programs, such as program codes of computer programs. The memory can also be used to temporarily store data that has been output or is about to be output.

[0168] An embodiment of the present application also provides a hydrogen fuel cell vehicle, which includes a hydrogen fuel cell vehicle body and a controller, and the controller executes the steps in the above-mentioned various method embodiments.

[0169] A hydrogen fuel cell vehicle provided in an embodiment of the present application has the same beneficial effects as the battery output power control method of the above-mentioned hydrogen fuel cell vehicle.

[0170] The embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0171] A computer-readable storage medium provided in an embodiment of the present application has the same beneficial effects as the above-mentioned method for controlling battery output power of a hydrogen fuel cell vehicle.

[0172] The present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of each of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to a terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electric carrier signal, a telecommunication signal, and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk.

[0173] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0174] Those of ordinary skill in the art will appreciate that the devices and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0175] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices, which can be electrical, mechanical or other forms.

[0176] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for controlling battery output power of a hydrogen fuel cell vehicle, characterized in that: The method comprises: Get the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle; When the current coolant temperature is lower than a preset coolant temperature threshold, determining a first vehicle driving state of the hydrogen fuel cell vehicle; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state; If the first vehicle driving state is an accelerating driving state, obtaining a first vehicle requested power corresponding to the first vehicle driving state; Based on the first vehicle requested power, the first output power of the fuel cell and the second output power of the power battery are determined in a manner that prioritizes increasing the output power of the fuel cell; the sum of the first output power and the second output power is equal to the first vehicle requested power.

2. The method according to claim 1, characterized in that The determining the first output power of the fuel cell and the second output power of the power battery in a manner of preferentially increasing the output power of the fuel cell based on the first vehicle requested power includes: determining a maximum output power of the fuel cell under the first vehicle driving state; If the maximum output power is greater than or equal to the first vehicle requested power, determining the first output power of the fuel cell to be the first vehicle requested power; If the maximum output power is less than the first vehicle requested power, the first output power of the fuel cell is determined to be the maximum output power, and the second output power of the power battery is determined according to the power difference between the first vehicle requested power and the first output power.

3. The method according to claim 1, characterized in that The method further comprises: If the first vehicle driving state is a charging state, determining a current battery power of the power battery; The first output power of the fuel cell is determined according to the current battery power, the upper limit value of the charging power of the power battery and the maximum recoverable power of the power battery.

4. The method according to claim 3, characterized in that The determining the first output power of the fuel cell according to the current battery power, the upper limit of the charging power of the power battery and the maximum recoverable power of the power battery includes: If the current battery power is less than the upper limit of the charging power of the power battery, determining the preset output power of the fuel cell; When the preset output power meets a preset setting condition, determining the first output power of the fuel cell to be the preset output power; Otherwise, the first output power of the fuel cell is determined to be 0 KW.

5. The method according to claim 4, characterized in that When the preset output power satisfies a preset setting condition, determining the first output power of the fuel cell to be the preset output power includes: Determining a charging power difference between the maximum recoverable power of the power battery and the maximum recoverable power of the motor; If the preset output power is less than the charging power difference, the first output power of the fuel cell is determined to be the preset output power.

6. The method according to claim 1, characterized in that The method further comprises: When the current coolant temperature is greater than or equal to a preset coolant temperature threshold, determining a second vehicle driving state of the hydrogen fuel cell vehicle; If the second vehicle driving state is an accelerating driving state, obtaining a second vehicle requested power corresponding to the second vehicle driving state; Based on the second vehicle requested power, the first output power of the fuel cell and the second output power of the power battery are determined in a manner that prioritizes increasing the output power of the power battery; the sum of the first output power and the second output power is equal to the vehicle requested power.

7. The method according to claim 6, characterized in that The method further comprises: If the second vehicle driving state is a charging state, the first output power of the fuel cell is determined to be 0 kW, and the power battery is charged through the vehicle body electronic stability system.

8. A battery output power control device for a hydrogen fuel cell vehicle, characterized in that: The device comprises: A temperature acquisition module, used to acquire the current coolant temperature of the fuel cell of the hydrogen fuel cell vehicle; A state determination module, used to determine a first vehicle driving state of the hydrogen fuel cell vehicle when the current coolant temperature is lower than a preset coolant temperature threshold; the preset coolant temperature threshold is the lowest temperature at which the fuel cell can enter a hot standby state; a power acquisition module, configured to acquire a first vehicle requested power corresponding to the first vehicle driving state if the first vehicle driving state is an accelerated driving state; A power determination module is used to determine the first output power of the fuel cell and the second output power of the power battery in a manner that prioritizes increasing the output power of the fuel cell based on the first vehicle request power; the sum of the first output power and the second output power is equal to the first vehicle request power.

9. A hydrogen fuel cell vehicle, characterized in that: It comprises a hydrogen fuel cell vehicle body and a controller, and the controller executes the steps of the method as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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