Warming method, device and equipment of fuel cell system and storage medium

Abstract

The invention discloses a warming-up method, device and equipment of a fuel cell system and a storage medium, and the method comprises the following steps: after the fuel cell system is started, controlling the fuel cell system to enter an idle running state; controlling the fuel cell system to enter a warm-up state according to the operation parameters of the fuel cell system in the idling operation state; and according to the current total voltage of the electric piles of the fuel cell system or the current lowest single-piece voltage of the electric piles of the fuel cell system, loading warm-up current to the electric piles in the fuel cell system. Therefore, no matter whether the fuel cell system is at a low temperature or a normal temperature, quick warming of the fuel cell system can be realized by utilizing heating in the process of controlling the warming current, so that the fuel cell system can be ensured to quickly enter a stable working state; and the speed and the stability of the fuel cell system during low-temperature or normal-temperature starting are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of fuel cell systems, and in particular, relates to a warm-up method, device, equipment and storage medium for a fuel cell system. Background Art

[0002] A fuel cell is a device that converts chemical energy directly into electrical energy. It has the advantages of high efficiency and environmental protection, and is widely used in the fields of automobiles and power supply. A fuel cell system refers to a power generation system with a fuel cell as the core, and composed of an air subsystem, a hydrogen subsystem, a thermal management subsystem, and a DCDC (DC-to-DC converter). The fuel cell system cannot be immediately loaded to the maximum power state whether it is started at low temperature or at room temperature. Instead, it needs to stay at the warm-up current for a certain period of time to warm up the stack of the fuel cell system, so that the stack can be preheated to the normal operating temperature at a lower temperature to avoid damage to the stack caused by sudden heat.

[0003] In the related art, after the fuel cell system is started at low temperature, the temperature of the coolant in the stack rises slowly. If the heating time is too long, the water generated in the fuel cell will freeze into ice, which will not only damage the catalyst layer, but also hinder the entry of the reaction gas, causing the fuel cell performance to decay, and easily lead to failures such as output power limitation. In addition, when the fuel cell system is started at room temperature, the electrochemical reaction of the stack is faster at high current density, and excessive water production will cause the stack to be flooded, resulting in startup failure and poor startup reliability. Summary of the invention

[0004] The embodiments of the present application provide a warm-up method, device, equipment and storage medium for a fuel cell system, which can improve the speed and stability of the fuel cell system when it is started at low temperature or normal temperature, at least to a certain extent.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] According to a first aspect of an embodiment of the present application, a method for warming up a fuel cell system is provided, comprising:

[0007] After the fuel cell system is started, controlling the fuel cell system to enter an idle operation state;

[0008] According to the operating parameters of the fuel cell system in the idle running state, controlling the fuel cell system to enter the warm-up state;

[0009] A warm-up current is loaded to the stack in the fuel cell system according to a current total stack voltage or a current minimum single-chip voltage of the stack of the fuel cell system.

[0010] In some embodiments, controlling the warm-up current according to the current total voltage of the battery stack or the current minimum single-chip voltage of the battery stack includes:

[0011] Loading a preset warm-up current to a fuel cell stack in the fuel cell system;

[0012] When the current total voltage of the battery stack is less than the preset minimum rapid warm-up total voltage, or the current minimum battery stack single chip voltage is less than the preset minimum rapid warm-up single chip voltage, the warm-up current is reduced;

[0013] When the current total voltage of the battery stack is greater than the preset maximum rapid warm-up total voltage, or the current minimum battery stack single chip voltage is greater than the preset maximum rapid warm-up single chip voltage, the warm-up current is loaded.

[0014] In some embodiments, after reducing the warm-up current or loading the warm-up current, the warm-up method further includes:

[0015] When the warm-up current after load shedding is less than the preset minimum load shedding current, updating the preset minimum load shedding current to the warm-up current after load shedding;

[0016] When the warm-up current after loading is greater than the preset maximum loading current, the preset maximum loading current is updated to the warm-up current after loading.

[0017] In some embodiments, controlling the fuel cell system to enter an idle operation state includes:

[0018] When the current stack temperature of the coolant is lower than the preset low-temperature cold start temperature, the coolant is heated to the preset low-temperature cold start temperature so that the fuel cell system enters an idle operation state.

[0019] In some embodiments, the operating parameters include the current temperature of the coolant entering the stack, the current voltage of the single cell of the stack, and the current total voltage of the stack. The step of controlling the fuel cell system to enter the warm-up state according to the operating parameters of the fuel cell system in the idle operation state includes:

[0020] When the current stack temperature is lower than the preset warm-up temperature, the current stack single chip voltage is higher than the preset warm-up single chip voltage, and the current stack total voltage is higher than the preset warm-up total voltage, the fuel cell system is controlled to enter the warm-up state.

[0021] In some embodiments, the fuel cell system includes a water pump and a temperature control valve, and before the warm-up current is loaded to the stack in the fuel cell system according to the current total stack voltage or the current minimum single-chip voltage of the stack of the fuel cell system, the warm-up method further includes:

[0022] Controlling the rotation speed of the water pump to a preset minimum rotation speed;

[0023] Controlling the opening of the temperature control valve to a preset minimum opening;

[0024] Controlling a target flow rate of air entering the fuel cell stack to be a preset flow rate;

[0025] Controlling the target pressure of air entering the fuel cell stack to be a preset pressure;

[0026] A target pressure of hydrogen gas entering the fuel cell stack is controlled to follow the target pressure of air.

[0027] In some embodiments, after controlling the warm-up current according to the current total voltage of the battery stack or the current minimum single-chip voltage of the battery stack, the warm-up method further includes:

[0028] The warm-up state is exited when the current stack temperature of the coolant reaches the preset exit warm-up temperature, the warm-up time is longer than the preset time, a shutdown command is received, or the fuel cell system fails.

[0029] According to a second aspect of an embodiment of the present application, a warm-up device for a fuel cell system is provided, comprising:

[0030] An idle operation control module, used to control the fuel cell system to enter an idle operation state after the fuel cell system is started;

[0031] a warm-up state control module, used to control the fuel cell system to enter a warm-up state according to the operating parameters of the fuel cell system in an idle running state;

[0032] The warm-up current control module is used to load the warm-up current to the stack in the fuel cell system according to the current total stack voltage or the current minimum single-chip voltage of the stack of the fuel cell system.

[0033] According to a third aspect of an embodiment of the present application, a warm-up device for a fuel cell system is provided, comprising a processor and a memory, wherein the memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, the steps of the method described in any one of the first aspects above are implemented.

[0034] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor is prompted to implement the steps of the method described in any one of the first aspects above.

[0035] In the present application, after the fuel cell system is started, the fuel cell system is controlled to enter an idle operation state; the fuel cell system is controlled to enter a warm-up state according to the operating parameters of the fuel cell system in the idle operation state; and the warm-up current is loaded to the stack in the fuel cell system according to the current total voltage of the stack or the current minimum single-chip voltage of the stack of the fuel cell system. In this way, whether the fuel cell system is at low temperature or room temperature, the heat generated in the process of controlling the warm-up current can be used to achieve rapid warm-up of the fuel cell system, ensuring that the fuel cell system can quickly enter a stable working state, and improving the speed and stability of the fuel cell system when starting at low temperature or room temperature.

[0036] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0038] Figure 1 A schematic flow chart of a warm-up method for a fuel cell system in one embodiment is shown;

[0039] Figure 2 A functional module diagram of a fuel cell system in one embodiment is shown;

[0040] Figure 3 A schematic diagram of the process of step 103 in one embodiment is shown;

[0041] Figure 4 A block diagram of a warm-up device for a fuel cell system in one embodiment is shown;

[0042] Figure 5 A schematic structural diagram of a warm-up device for a fuel cell system in one embodiment is shown. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0045] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0046] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0047] Figure 1 FIG. 2 shows a schematic flow chart of a warm-up method for a fuel cell system in one embodiment. Figure 1 As shown, the warm-up method of the fuel cell system may include the following steps 101 to 103 .

[0048] In step 101, after the fuel cell system is started, the fuel cell system is controlled to enter an idle operation state.

[0049] Figure 2 FIG. 2 shows a functional module diagram of a fuel cell system in one embodiment. Figure 2As shown, the fuel cell system may include a fuel cell stack 200, an air subsystem 201, a hydrogen subsystem 202 and a thermal management subsystem 203, wherein the thermal management subsystem 203 includes equipment such as a water pump and a temperature control valve, the air subsystem 201 is used to adjust the flow rate and pressure of air entering the cathode of the fuel cell stack 200; the hydrogen subsystem 202 is used to adjust the flow rate and pressure of hydrogen entering the anode of the fuel cell stack 200; the thermal management subsystem 203 controls the temperature of the coolant entering and exiting the fuel cell stack 200 through a water pump, and controls the flow direction of the coolant through a temperature control valve.

[0050] It is understandable that the warm-up method of the fuel cell system of the present application is applicable to low-temperature startup and normal-temperature startup of the fuel cell system, and can improve the low-temperature startup or normal-temperature startup capability of the fuel cell system. Among them, low-temperature startup of the fuel cell system refers to startup of the fuel cell system at a temperature below freezing.

[0051] When the fuel cell system is started at low temperature, the coolant entering the fuel cell stack needs to be heated to the preset low-temperature cold start temperature before the fuel cell system is controlled to enter the idle operation state; when the fuel cell system is started at normal temperature, the fuel cell system can be directly controlled to enter the idle operation state.

[0052] In some embodiments, when the current stack temperature of the coolant is lower than the preset low-temperature cold start temperature, the coolant may be heated to the preset low-temperature cold start temperature so that the fuel cell system enters the idle operation state.

[0053] During the implementation process, the coolant can be quickly heated by turning on the PTC (Positive Temperature Coefficient) relay. After the current stack temperature reaches the preset low-temperature cold start temperature, the PTC relay is turned off to stop heating.

[0054] In step 102, the fuel cell system is controlled to enter a warm-up state according to the operating parameters of the fuel cell system in an idle operating state.

[0055] When the fuel cell system enters the idle operation state, the stack current is loaded to the idle current, and the speed of the water pump, the opening of the temperature control valve, the target pressure of the air entering the stack, the target air flow and the target hydrogen pressure are controlled in the idle operation state.

[0056] In the implementation process, the speed of the water pump can be closed-loop PID controlled according to the temperature difference between the coolant entering and leaving the stack. The opening of the temperature control valve can be closed-loop PID controlled according to the difference between the actual value and the target value of the coolant entering the stack. The air target pressure can be obtained by looking up the stack current. The hydrogen target pressure follows the air target pressure. The air target flow rate can be adjusted to be calculated according to the stack current using the following formula:

[0057]

[0058] Among them, M air is the target air flow rate, n is the number of cells in the stack, I is the stack current, is the oxygen excess coefficient, and F is the Faraday constant.

[0059] At this time, the coolant temperature is at room temperature and has not reached the temperature required for the normal operation of the fuel cell stack, so it is necessary to determine whether to control the fuel cell system to enter the warm-up state.

[0060] In some embodiments, the operating parameters include the current stack entry temperature of the coolant, the current single-chip voltage of the fuel cell stack and the current total voltage of the fuel cell stack. When the current stack entry temperature is lower than the preset warm-up temperature, the current single-chip voltage of the fuel cell stack is higher than the preset single-chip voltage for entering warm-up and the current total voltage of the fuel cell stack is higher than the preset total voltage for entering warm-up, the fuel cell system is controlled to enter a warm-up state.

[0061] It can be understood that during the entire control process of the fuel cell system, the coolant entering the stack temperature, the stack single chip voltage and the stack total voltage are constantly changing. The current stack entering temperature refers to the coolant entering the stack temperature at the current moment, the current stack single chip voltage refers to the stack single chip voltage at the current moment, and the current stack total voltage refers to the stack total voltage at the current moment.

[0062] When judging whether to control the fuel cell system to enter the warm-up state, the corresponding stack temperature, single-chip voltage of the stack and total voltage of the stack when the fuel cell system is in the idle operation state are used.

[0063] Of course, if the current stack temperature is not less than the preset warm-up temperature, the current stack single-chip voltage is not greater than the preset warm-up single-chip voltage and the current stack total voltage is not greater than the preset warm-up total voltage, the fuel cell system is controlled to maintain idle operation.

[0064] In step 103, a warm-up current is loaded to the stack in the fuel cell system according to the current total stack voltage or the current minimum single-chip voltage of the stack of the fuel cell system.

[0065] When the fuel cell system enters the warm-up state, the water pump speed, the opening of the temperature control valve, the target air pressure entering the fuel cell stack, the target air flow and the target hydrogen pressure are first controlled, and then the preset warm-up current is loaded.

[0066] In some embodiments, the speed of the water pump can be controlled to a preset minimum speed; the opening of the temperature control valve can be controlled to a preset minimum opening; the target flow rate of air entering the fuel cell stack can be controlled to a preset flow rate; the target pressure of air entering the fuel cell stack can be controlled to a preset pressure; and the target pressure of hydrogen entering the fuel cell stack can be controlled to follow the target pressure of air entering the fuel cell stack.

[0067] After the preset warm-up current is loaded, the warm-up current is loaded or the warm-up current is reduced according to the current total voltage of the battery stack or the current minimum single-chip voltage of the battery stack.

[0068] In some embodiments, when the current total voltage of the battery stack is less than the preset minimum rapid warm-up total voltage, or the current minimum battery stack single-chip voltage is less than the preset minimum rapid warm-up single-chip voltage, the warm-up current is reduced; when the current total voltage of the battery stack is greater than the preset maximum rapid warm-up total voltage, or the current minimum battery stack single-chip voltage is greater than the preset maximum rapid warm-up single-chip voltage, the warm-up current is loaded.

[0069] When the warm-up current after load reduction is less than the preset minimum load reduction current, the preset minimum load reduction current is updated to the warm-up current after load reduction; when the warm-up current after loading is greater than the preset maximum loading current, the preset maximum loading current is updated to the warm-up current after loading.

[0070] Figure 3 FIG. 1 shows a flow chart of step 103 in one embodiment. Figure 3 As shown, a warm-up current is first loaded into the battery stack, and a preset maximum loading current is set. If the warm-up current after loading exceeds the preset maximum loading current, the warm-up current after loading is limited to the preset maximum loading current.

[0071] During the loading process of the warm-up current, if the current total voltage of the battery stack is less than the preset minimum rapid warm-up total voltage, or the current minimum battery stack single-chip voltage is less than the preset minimum rapid warm-up single-chip voltage, the warm-up current load reduction process is entered, and the preset minimum load reduction current is set. If the warm-up current after load reduction is less than the preset minimum load reduction current, the warm-up current after load reduction is limited to the preset minimum load reduction current.

[0072] During the load reduction process of the warm-up current, if the current total voltage of the battery stack is greater than the preset maximum rapid warm-up total voltage, or the current minimum battery stack single-chip voltage is greater than the preset maximum rapid warm-up single-chip voltage, the warm-up current loading process is entered again, and the heat generated by the load addition and reduction process of the large current of the battery stack is continuously utilized to achieve rapid warm-up of the battery stack after startup, and quickly increase the coolant temperature in a short time.

[0073] In some embodiments, the warm-up state is exited when the current stack temperature of the coolant reaches a preset exit warm-up temperature, the warm-up time is longer than a preset time, a shutdown command is received, or a fuel cell system failure occurs.

[0074] In the process of exiting the warm-up state, the warm-up current is first reduced, and the current after reduction is limited to the idle current of the fuel cell stack, returning to the idle operation state of the fuel cell stack, and then the speed of the water pump, the opening of the temperature control valve, the target pressure of the air entering the fuel cell stack, the target air flow and the target hydrogen pressure are controlled.

[0075] During the implementation process, the speed of the water pump can be adjusted to perform closed-loop PID control based on the temperature difference between the coolant entering and leaving the fuel cell stack. The opening of the temperature control valve can be adjusted to perform closed-loop PID control based on the difference between the actual value and the target value of the coolant entering the stack. The target air pressure can be adjusted to be obtained by looking up the table based on the fuel cell stack current. The target air flow rate can be adjusted to be calculated based on the fuel cell stack current.

[0076] The embodiment of the present application controls the fuel cell system to enter an idle running state after the fuel cell system is started; controls the fuel cell system to enter a warm-up state according to the operating parameters of the fuel cell system in the idle running state; and loads a warm-up current to the stack in the fuel cell system according to the current total voltage of the stack or the current minimum single-chip voltage of the stack of the fuel cell system. Among them, by utilizing the heat generated in the process of controlling the warm-up current, not only the coolant temperature is quickly increased in a short time, the warm-up time after the fuel cell system is started is significantly shortened, and the fuel cell system is ensured to quickly enter a stable working state, and the speed and stability of the fuel cell system when it is started at low or normal temperature are improved, and the energy required for warm-up is small enough, which helps to extend the cruising range of the fuel cell system.

[0077] The following describes an apparatus embodiment of the present application, which can be used to execute the warm-up method of the fuel cell system in the above-mentioned embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, please refer to the above-mentioned embodiment of the warm-up method of the fuel cell system of the present application.

[0078] Figure 4 FIG. 2 shows a block diagram of a warm-up device for a fuel cell system in one embodiment. Figure 4 As shown, the warm-up device of the fuel cell system of the embodiment of the present application may include: an idle operation control module 401, a warm-up state control module 402 and a warm-up current control module 403, wherein the idle operation control module 401 is used to control the fuel cell system to enter an idle operation state after the fuel cell system is started; the warm-up state control module 402 is used to control the fuel cell system to enter a warm-up state according to the operating parameters of the fuel cell system in the idle operation state; the warm-up current control module 403 is used to load a warm-up current to the stack in the fuel cell system according to the current total stack voltage or the current minimum single-chip stack voltage of the stack of the fuel cell system.

[0079] In some embodiments, the warm-up current control module 403 can also be used to load a preset warm-up current to the fuel cell stack in the fuel cell system; reduce the warm-up current when the current total voltage of the fuel cell stack is less than the preset minimum rapid warm-up total voltage, or the current minimum single-chip voltage of the fuel cell stack is less than the preset minimum rapid warm-up single-chip voltage; load the warm-up current when the current total voltage of the fuel cell stack is greater than the preset maximum rapid warm-up total voltage, or the current minimum single-chip voltage of the fuel cell stack is greater than the preset maximum rapid warm-up single-chip voltage.

[0080] In some embodiments, the warm-up current control module 403 can also be used to update the preset minimum load reduction current to the warm-up current after load reduction when the warm-up current after load reduction is less than the preset minimum load reduction current; and to update the preset maximum loading current to the warm-up current after loading when the warm-up current after loading is greater than the preset maximum loading current.

[0081] In some embodiments, the operating parameters include the current stack temperature of the coolant, the current single-chip voltage of the fuel cell stack and the current total voltage of the fuel cell stack. The idle operation control module 401 can also be used to heat the coolant to the preset low-temperature cold start temperature when the current stack temperature is lower than the preset low-temperature cold start temperature, so as to put the fuel cell system into an idle operation state.

[0082] In some embodiments, the warm-up state control module 402 is also used to control the fuel cell system to enter the warm-up state when the current stack temperature is lower than the preset warm-up temperature, the current stack single-chip voltage is higher than the preset warm-up single-chip voltage, and the current stack total voltage is higher than the preset warm-up total voltage.

[0083] In some embodiments, the warm-up current control module 403 can also be used to control the speed of the water pump to a preset minimum speed; control the opening of the temperature control valve to a preset minimum opening; control the target flow rate of air entering the fuel cell stack to a preset flow rate; control the target pressure of air entering the fuel cell stack to a preset pressure; control the target pressure of hydrogen entering the fuel cell stack to follow the target air pressure.

[0084] In some embodiments, the warm-up current control module 403 can also be used to exit the warm-up state when the current stack entry temperature of the coolant reaches a preset exit warm-up temperature, the warm-up time is longer than a preset time, a shutdown command is received, or the fuel cell system fails.

[0085] Based on the same inventive concept, the present application also provides a warm-up device for a fuel cell system, referring to Figure 5, shows a schematic diagram of the structure of the warm-up device of the fuel cell system in an embodiment of the present application, wherein the warm-up device of the fuel cell system includes one or more memories 504, one or more processors 502, and at least one computer program (computer program instruction) stored in the memory 504 and executable on the processor 502, and the processor 402 implements the method described above when executing the computer program.

[0086] Among them, Figure 5 In the embodiment of the present invention, a bus architecture (represented by bus 500) is shown, which may include any number of interconnected buses and bridges, and bus 500 links various circuits including one or more processors represented by processor 502 and memory represented by memory 504. Bus 400 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 505 provides an interface between bus 500 and receiver 501 and transmitter 503. Receiver 501 and transmitter 503 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 502 is responsible for managing bus 500 and general processing, while memory 504 may be used to store data used by processor 502 when performing operations.

[0087] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, in which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor is prompted to implement the steps of the method as described above.

[0088] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0090] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly or all or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store computer program instructions.

[0092] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A method for warming up a fuel cell system, characterized in that: include: After the fuel cell system is started, controlling the fuel cell system to enter an idle operation state; According to the operating parameters of the fuel cell system in the idle running state, controlling the fuel cell system to enter the warm-up state; A warm-up current is loaded to the stack in the fuel cell system according to a current total stack voltage or a current minimum single-chip voltage of the stack of the fuel cell system.

2. The method for warming up a fuel cell system according to claim 1, characterized in that: The step of loading a warm-up current to a stack in the fuel cell system according to a current total stack voltage or a current minimum single-chip stack voltage of the stack of the fuel cell system comprises: Loading a preset warm-up current to a fuel cell stack in the fuel cell system; When the current total voltage of the battery stack is less than the preset minimum rapid warm-up total voltage, or the current minimum battery stack single chip voltage is less than the preset minimum rapid warm-up single chip voltage, the warm-up current is reduced; When the current total voltage of the battery stack is greater than the preset maximum rapid warm-up total voltage, or the current minimum battery stack single chip voltage is greater than the preset maximum rapid warm-up single chip voltage, the warm-up current is loaded.

3. The method for warming up a fuel cell system according to claim 2, characterized in that: After the step of reducing the warm-up current or loading the warm-up current, the warm-up method further includes: When the warm-up current after load shedding is less than the preset minimum load shedding current, updating the preset minimum load shedding current to the warm-up current after load shedding; When the warm-up current after loading is greater than the preset maximum loading current, the preset maximum loading current is updated to the warm-up current after loading.

4. The method for warming up a fuel cell system according to claim 1, characterized in that: The controlling the fuel cell system to enter an idle operation state comprises: When the current stack temperature of the coolant is lower than the preset low-temperature cold start temperature, the coolant is heated to the preset low-temperature cold start temperature so that the fuel cell system enters an idle operation state.

5. The method for warming up a fuel cell system according to claim 1, characterized in that: The operating parameters include the current temperature of the coolant entering the stack, the current voltage of the single cell of the stack, and the current total voltage of the stack. According to the operating parameters of the fuel cell system in the idle running state, controlling the fuel cell system to enter the warm-up state includes: When the current stack temperature is lower than the preset warm-up temperature, the current stack single chip voltage is higher than the preset warm-up single chip voltage, and the current stack total voltage is higher than the preset warm-up total voltage, the fuel cell system is controlled to enter the warm-up state.

6. The method for warming up a fuel cell system according to any one of claims 1 to 5, characterized in that: The fuel cell system includes a water pump and a temperature control valve. Before the warm-up current is loaded to the stack in the fuel cell system according to the current total voltage of the stack or the current minimum single-chip voltage of the stack of the fuel cell system, the warm-up method further includes: Controlling the rotation speed of the water pump to a preset minimum rotation speed; Controlling the opening of the temperature control valve to a preset minimum opening; Controlling a target flow rate of air entering the fuel cell stack to be a preset flow rate; Controlling the target pressure of air entering the fuel cell stack to be a preset pressure; A target pressure of hydrogen gas entering the fuel cell stack is controlled to follow the target pressure of air.

7. The warm-up method of a fuel cell system according to any one of claims 1 to 5, characterized in that: After the warm-up current is loaded to the stack in the fuel cell system according to the current total stack voltage or the current minimum single-chip voltage of the stack of the fuel cell system, the warm-up method further includes: The warm-up state is exited when the current stack temperature of the coolant reaches the preset exit warm-up temperature, the warm-up time is longer than the preset time, a shutdown command is received, or the fuel cell system fails.

8. A warm-up device for a fuel cell system, characterized in that: include: An idle operation control module, used to control the fuel cell system to enter an idle operation state after the fuel cell system is started; a warm-up state control module, used to control the fuel cell system to enter a warm-up state according to the operating parameters of the fuel cell system in an idle running state; The warm-up current control module is used to load the warm-up current to the stack in the fuel cell system according to the current total stack voltage or the current minimum single-chip voltage of the stack of the fuel cell system.

9. A warm-up device for a fuel cell system, comprising a processor and a memory, characterized in that: The memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, which, when executed by a processor, prompt the processor to implement the steps of the method according to any one of claims 1 to 7.

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