Low-voltage power supply control method and device of fuel cell system and electronic equipment

Abstract

The invention provides a low-voltage power supply control method and device of a fuel cell system and electronic equipment, and relates to the technical field of low-voltage power supply management of the fuel cell system, and the method comprises the steps: monitoring the low-voltage power supply voltage of the fuel cell system in real time; comparing the low-voltage power supply voltage with a preset working voltage range, and judging the power supply state of the low-voltage power supply according to a comparison result; according to the power supply state, the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system is controlled, and the technical problem that the operation reliability of the fuel cell system is not high is solved by managing low-voltage power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage power supply management of a fuel cell system, and in particular to a low-voltage power supply control method, device and electronic equipment for a fuel cell system. Background Art

[0002] A fuel cell is a device that uses reaction gas as an energy source and converts chemical energy into electrical energy through electrochemical reactions; the fuel cell system is mainly composed of an air subsystem, a hydrogen subsystem, a cooling subsystem, a stack subsystem and a control subsystem.

[0003] In actual applications, when the low-voltage power supply of the entire vehicle is unstable, that is, when the low-voltage power supply voltage is outside the range boundary, the fuel cell system can only respond passively. Potential low-voltage power supply failures may cause system function failure or component damage, reducing system reliability. Summary of the invention

[0004] The object of the present invention is to provide a low-voltage power supply control method, device and electronic equipment for a fuel cell system, so as to alleviate the technical problem of low operating reliability of the fuel cell system by managing the low-voltage power supply.

[0005] In a first aspect, an embodiment of the present invention provides a low-voltage power supply control method for a fuel cell system, comprising:

[0006] Real-time monitoring of the low-voltage power supply voltage of the fuel cell system;

[0007] Comparing the low-voltage power supply voltage with a preset working voltage range, and determining the power supply state of the low-voltage power supply according to the comparison result;

[0008] According to the power supply state, the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system is controlled; wherein the low-voltage power supply is used to provide the low-voltage supply voltage for the fuel cell system.

[0009] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the step of comparing the low-voltage power supply voltage with a preset operating voltage range and judging the power supply state of the low-voltage power supply according to the comparison result includes:

[0010] When the low-voltage supply voltage is outside the preset operating voltage range, judging the power supply state of the low-voltage power supply according to a comparison result of the voltage change rate of the low-voltage supply voltage and a first preset voltage change rate threshold;

[0011] When the low-voltage power supply voltage is within the preset operating voltage range, the power supply state of the low-voltage power supply is determined according to the switching state of the low-voltage power supply in the fuel cell system.

[0012] In combination with the first aspect, an embodiment of the present invention provides a second possible implementation of the first aspect, wherein when the low-voltage power supply voltage is outside a preset operating voltage range, the step of judging the power supply state of the low-voltage power supply according to a comparison result of a voltage change rate of the low-voltage power supply voltage and a first preset voltage change rate threshold value includes:

[0013] When the low-voltage supply voltage is outside the preset operating voltage range, determining whether a voltage change rate of the low-voltage supply voltage exceeds a first preset voltage change rate threshold;

[0014] If the voltage change rate of the low-voltage power supply voltage is greater than the first preset voltage change rate threshold, the low-voltage power supply is determined to be in a power supply state that needs to be shut down to process the fuel cell system;

[0015] If the voltage change rate of the low-voltage power supply voltage is less than the first preset voltage change rate threshold, the low-voltage power supply is determined to be a power supply state that requires the fuel cell system to jump to a shutdown mode.

[0016] In combination with the first aspect, an embodiment of the present invention provides a third possible implementation of the first aspect, wherein when the low-voltage power supply voltage is within the preset operating voltage range, the step of judging the power supply state of the low-voltage power supply according to the switching state of the low-voltage power supply in the fuel cell system includes:

[0017] When the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range meets the preset threshold, the switching state of the low-voltage power supply in the fuel cell system is judged; if the low-voltage power supply has not been switched, the low-voltage power supply is determined as a power supply state that requires the fuel cell system to switch the low-voltage power supply; if the low-voltage power supply has been switched, the power supply state of the low-voltage power supply is determined based on the comparison result of the voltage change rate of the low-voltage power supply voltage and the second preset voltage change rate threshold;

[0018] When the low-voltage supply voltage is within the preset operating voltage range and the difference between the low-voltage supply voltage and the boundary value of the preset operating voltage range does not meet the preset threshold, the low-voltage power supply is determined as a power supply state in which the fuel cell system has not switched to the low-voltage power supply.

[0019] In combination with the first aspect, an embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein, if the low-voltage power supply has been switched, the step of determining the power supply state of the low-voltage power supply according to the comparison result of the voltage change rate of the low-voltage power supply voltage and the second preset voltage change rate threshold includes:

[0020] If the low-voltage power supply has been switched, when the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold, the low-voltage power supply is determined as a power supply state that requires the fuel cell system to jump to the shutdown mode;

[0021] If the low-voltage power supply has been switched, when the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold, the low-voltage power supply is determined to be in a power supply state that limits the power used by the fuel cell system.

[0022] In combination with the first aspect, an embodiment of the present invention provides a fifth possible implementation of the first aspect, wherein the step of controlling the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state includes:

[0023] When the low-voltage supply voltage is outside the preset operating voltage range, if the voltage change rate of the low-voltage supply voltage is greater than the first preset voltage change rate threshold, the fuel cell system is shut down; if the voltage change rate of the low-voltage supply voltage is less than the first preset voltage change rate threshold, the hydrogen, air pressure and DC output power of the fuel cell system are reduced, and the fuel cell system is controlled to enter a shutdown state.

[0024] In combination with the first aspect, an embodiment of the present invention provides a sixth possible implementation of the first aspect, wherein the step of controlling the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state includes:

[0025] When the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range meets the preset threshold, the switching state of the low-voltage power supply in the fuel cell system is determined:

[0026] If the low-voltage power supply has not been switched, the low-voltage power supply is switched to a backup power supply; if the low-voltage power supply has been switched, it is determined whether the voltage change rate of the low-voltage power supply voltage exceeds a second preset voltage change rate threshold;

[0027] If the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold, the hydrogen and air pressures and the DC output power of the fuel cell system are reduced, and the fuel cell system is controlled to enter a shutdown state; if the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold, the power usage of the fuel cell system is limited;

[0028] When the low-voltage supply voltage is within the preset operating voltage range and the difference between the low-voltage supply voltage and the boundary value of the preset operating voltage range does not meet the preset threshold, the low-voltage power supply is set to a non-switched state.

[0029] In a second aspect, an embodiment of the present invention further provides a low-voltage power supply control device for a fuel cell system, comprising:

[0030] Monitoring module, real-time monitoring of the low-voltage power supply voltage of the fuel cell system;

[0031] A judgment module compares the low-voltage power supply voltage with a preset working voltage range, and judges the power supply state of the low-voltage power supply according to the comparison result;

[0032] A control module controls the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state; wherein the low-voltage power supply is used to provide the low-voltage supply voltage for the fuel cell system.

[0033] In a third aspect, an embodiment provides an electronic device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program, the steps of the method described in any of the aforementioned implementation methods are implemented.

[0034] In a fourth aspect, an embodiment provides a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions prompt the processor to implement the steps of the method described in any one of the aforementioned implementations.

[0035] The embodiments of the present invention provide a low-voltage power supply control method, device and electronic device for a fuel cell system. The low-voltage power supply voltage of the fuel cell system is monitored in real time, and the power supply status of the current low-voltage power supply is determined based on the comparison between the low-voltage power supply voltage and a preset working voltage range. The working status of the fuel cell system is controlled or the low-voltage power supply in the fuel cell system is switched based on this power supply status to ensure the operating reliability of the fuel cell system.

[0036] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A flow chart of a low-voltage power supply control method for a fuel cell system provided by an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of another low-voltage power supply control method for a fuel cell system provided by an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of functional modules of a low-voltage power supply control device for a fuel cell system provided by an embodiment of the present invention;

[0042] Figure 4 A schematic diagram of the hardware architecture of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] At present, the fault diagnosis strategy for low-voltage power supply of fuel cells is not perfect. Potential low-voltage power supply failures can cause failure of the fuel cell system and damage to internal components of the fuel cell system.

[0045] Based on this, the embodiments of the present invention provide a low-voltage power supply control method, device and electronic equipment for a fuel cell system, which can improve the operating reliability of the fuel cell system by managing the low-voltage power supply.

[0046] To facilitate understanding of this embodiment, a low-voltage power supply control method for a fuel cell system disclosed in an embodiment of the present invention is first introduced in detail. This method can be applied to intelligent control devices such as fuel cell control systems, controllers, host computers, and servers.

[0047] Figure 1 A flow chart of a low-voltage power supply control method for a fuel cell system provided in an embodiment of the present invention.

[0048] Reference Figure 1 , the method may include the following steps:

[0049] Step S102 , monitoring the low voltage supply voltage of the fuel cell system in real time.

[0050] Among them, the low voltage supply voltage generally refers to the supply voltage provided by the 12V or 24V power supply system in the fuel cell system.

[0051] Step S104, comparing the low-voltage power supply voltage with a preset working voltage range, and determining the power supply state of the low-voltage power supply according to the comparison result.

[0052] Here, a reasonable working voltage range of the low-voltage power supply can be pre-set to determine whether the power supply state of the low-voltage power supply corresponding to the current low-voltage power supply voltage is abnormal. It is understandable that each type of fuel cell system will be configured with its rated working voltage range at the factory, and the preset working voltage range can be pre-set based on this voltage range to achieve abnormal detection of the power supply state of the fuel cell system.

[0053] Step S106, controlling the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state.

[0054] It is understandable that the working state of the fuel cell system or the switching state of the low-voltage power supply is controlled by the power supply state of the low-voltage power supply to ensure the operational reliability of the fuel cell system. The low-voltage power supply is used to provide a low-voltage power supply voltage for the fuel cell system.

[0055] In a preferred embodiment of actual application, the low-voltage power supply voltage of the fuel cell system is monitored in real time, the power supply status of the current low-voltage power supply is determined based on the comparison between the low-voltage power supply voltage and the preset operating voltage range, and the working state of the fuel cell system is controlled or the low-voltage power supply in the fuel cell system is switched based on this power supply status to ensure the operating reliability of the fuel cell system.

[0056] In some embodiments, the power supply state of the low-voltage power supply can be more accurately determined by comparing the low-voltage power supply voltage with a preset working voltage range and combining the voltage change of the power supply voltage; specifically, step S104 may include:

[0057] Step 1.1), when the low-voltage supply voltage is outside the preset working voltage range, the power supply state of the low-voltage power supply is determined according to a comparison result of the voltage change rate of the low-voltage supply voltage and a first preset voltage change rate threshold.

[0058] Exemplarily, in step 1.1.1), when the low-voltage supply voltage is outside the preset operating voltage range, it is determined whether the voltage change rate of the low-voltage supply voltage exceeds a first preset voltage change rate threshold.

[0059] Step 1.1.2), if the voltage change rate of the low-voltage power supply voltage is greater than a first preset voltage change rate threshold, the low-voltage power supply is determined to be in a power supply state that needs to be shut down to process the fuel cell system.

[0060] On this basis, step S106 can control the working state of the fuel cell system when the fuel cell system is in a power supply state that requires shutdown processing; that is, when the low-voltage power supply voltage is outside the preset working voltage range, if the voltage change rate of the low-voltage power supply voltage is greater than the first preset voltage change rate threshold, the fuel cell system is shut down.

[0061] Step 1.1.3), if the voltage change rate of the low-voltage power supply voltage is less than the first preset voltage change rate threshold, the low-voltage power supply is determined as a power supply state that requires the fuel cell system to jump to the shutdown mode.

[0062] On this basis, step S106 can control the working state of the fuel cell system when the fuel cell system is in a power supply state that needs to jump to the shutdown mode; that is, if the voltage change rate of the low-voltage power supply voltage is less than the first preset voltage change rate threshold, the hydrogen, air pressure and DC output power of the fuel cell system are reduced, and the output of the fuel cell system is controlled to make it jump the system state into the shutdown state.

[0063] Step 1.2), when the low-voltage power supply voltage is within a preset operating voltage range, the power supply state of the low-voltage power supply is determined according to the switching state of the low-voltage power supply in the fuel cell system.

[0064] Exemplarily, in step 1.2.1), when the low-voltage supply voltage is within the preset operating voltage range and the difference between the low-voltage supply voltage and the boundary value of the preset operating voltage range meets the preset threshold, the switching state of the low-voltage power supply in the fuel cell system is determined.

[0065] It should be noted that the low-voltage supply voltage is within the preset operating voltage range and the difference between the low-voltage supply voltage and the boundary value of the preset operating voltage range meets the preset threshold value, which can be understood as the low-voltage supply voltage at this time is closer to the boundary value of the preset operating voltage range; for example, the preset operating range is 9V-16V, and the preset threshold value is 1V; that is, if the low-voltage supply voltage is between 9V-10V or 15V-16V, the subsequent steps of determining the switching state of the low-voltage power supply in the fuel cell system are executed.

[0066] Step 1.2.11), if the low-voltage power supply has not been switched, the low-voltage power supply is determined to be in a power supply state that requires the fuel cell system to switch the low-voltage power supply.

[0067] On this basis, step S106 can control the switching of the low-voltage power supply in the fuel cell system when the fuel cell system is in a power supply state that requires switching the power supply; that is, if the low-voltage power supply has not been switched, the low-voltage power supply is switched to the backup power supply.

[0068] Step 1.2.12), if the low-voltage power supply has been switched, the power supply state of the low-voltage power supply is determined according to a comparison result of the voltage change rate of the low-voltage power supply voltage and a second preset voltage change rate threshold.

[0069] Exemplarily, step 1.2.12) can be achieved by the following steps:

[0070] Step a, if the low-voltage power supply has been switched, when the voltage change rate of the low-voltage power supply voltage is greater than a second preset voltage change rate threshold, the low-voltage power supply is determined as a power supply state that requires the fuel cell system to jump to the shutdown mode;

[0071] On this basis, step S106 can control the working state of the fuel cell system when the fuel cell system is in a power supply state that needs to jump to the shutdown mode; that is, if the low-voltage power supply has been switched, it is determined whether the voltage change rate of the low-voltage power supply voltage exceeds the second preset voltage change rate threshold. If the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold, the hydrogen and air pressures and DC output power of the fuel cell system are reduced, and the fuel cell system is controlled to enter the shutdown state.

[0072] Step b: if the low voltage power supply has been switched, when the voltage change rate of the low voltage power supply voltage is less than the second preset voltage change rate threshold, the low voltage power supply is determined as a power supply state that limits the power used by the fuel cell system.

[0073] On this basis, step S106 can control the working state of the fuel cell system when the fuel cell system is in a power supply state with limited power usage; that is, if the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold, the power usage of the fuel cell system is limited.

[0074] Step 1.2.2), when the low-voltage power supply voltage is within the preset operating voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset operating voltage range does not meet the preset threshold, the low-voltage power supply is determined as a power supply state in which the fuel cell system has not switched to the low-voltage power supply.

[0075] On this basis, step S106 can control the working state of the fuel cell system when the fuel cell system is in a power supply state without switching the power supply; that is, when the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range does not meet the preset threshold, the low-voltage power supply is set to an unswitched state.

[0076] It should be noted that the first preset voltage change rate threshold and the second preset voltage change rate threshold can be set separately or to the same value, and are used to evaluate whether the fuel cell system can be shut down in an orderly manner. The lower the voltage change rate threshold is preset, the longer the time it takes to control the fuel cell system to execute the shutdown command.

[0077] As an optional embodiment, the switching of the low-voltage power supply in the steps of the aforementioned embodiment can be achieved by controlling the relay through the control unit to switch different power supply circuits; or, the control unit controls the electronic devices (such as triodes, etc.) through its own integrated circuit functions to achieve power supply switching.

[0078] Figure 2 A schematic diagram of another low-voltage power supply control method for a fuel cell system provided in an embodiment of the present invention.

[0079] like Figure 2 As shown, the low-voltage power supply control method of the fuel cell system also includes the following steps:

[0080] Real-time monitoring of the low-voltage power supply voltage of the fuel cell system;

[0081] When the low-voltage power supply voltage is outside the preset working voltage range (9V-16V), determine whether the voltage change rate of the low-voltage power supply voltage exceeds the first preset voltage change rate threshold value X1; if the voltage change rate of the low-voltage power supply voltage is greater than the first preset voltage change rate threshold value X1, the fuel cell system is shut down and a LVF001 low-voltage power supply fault alarm (Low Voltage Fault, LVF) is issued; if the voltage change rate of the low-voltage power supply voltage is less than the first preset voltage change rate threshold value, adjust the control parameters, that is, reduce the hydrogen and air pressures and DC output power of the fuel cell system, and control the fuel cell system to enter the shutdown state, and issue a LVF002 low-voltage power supply fault alarm;

[0082] When the low-voltage power supply voltage (15V-16V or 9V-10V) is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range meets the preset threshold, the switching state of the low-voltage power supply in the fuel cell system is determined:

[0083] If the low-voltage power supply has not been switched (the power supply state is 0 at this time), the low-voltage power supply is switched to the backup power supply;

[0084] If the low-voltage power supply has been switched (the power supply state is 1 at this time), it is determined whether the voltage change rate of the low-voltage power supply voltage exceeds the second preset voltage change rate threshold value X2;

[0085] If the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold value X2, the control parameters are adjusted, that is, the hydrogen and air pressures and the DC output power of the fuel cell system are reduced, and the fuel cell system is controlled to enter the shutdown state, and the LVF002 low-voltage power supply fault alarm is issued; if the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold value, the power usage of the fuel cell system is limited, and the LVF003 low-voltage power supply fault alarm is issued;

[0086] When the low-voltage power supply voltage (10V-15V) is within the preset operating voltage range, the low-voltage power supply is set to an unswitched state (the power state is 0 at this time), and a normal power supply signal can also be fed back to the control system.

[0087] In some embodiments, Figure 3 As shown, an embodiment of the present invention further provides a low-voltage power supply control device for a fuel cell system, comprising:

[0088] Monitoring module, real-time monitoring of the low-voltage power supply voltage of the fuel cell system;

[0089] A judgment module compares the low-voltage power supply voltage with a preset working voltage range, and judges the power supply state of the low-voltage power supply according to the comparison result;

[0090] A control module controls the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state; wherein the low-voltage power supply is used to provide the low-voltage supply voltage for the fuel cell system.

[0091] In some embodiments, the judgment module is further specifically used to, when the low-voltage power supply voltage is outside the preset operating voltage range, judge the power supply state of the low-voltage power supply according to the comparison result of the voltage change rate of the low-voltage power supply voltage and the first preset voltage change rate threshold; when the low-voltage power supply voltage is within the preset operating voltage range, judge the power supply state of the low-voltage power supply according to the switching state of the low-voltage power supply in the fuel cell system.

[0092] In some embodiments, the judgment module is also specifically used to judge whether the voltage change rate of the low-voltage supply voltage exceeds a first preset voltage change rate threshold when the low-voltage supply voltage is outside a preset operating voltage range; if the voltage change rate of the low-voltage supply voltage is greater than the first preset voltage change rate threshold, the low-voltage power supply is determined to be a power supply state that requires the fuel cell system to be shut down; if the voltage change rate of the low-voltage supply voltage is less than the first preset voltage change rate threshold, the low-voltage power supply is determined to be a power supply state that requires the fuel cell system to jump to a shutdown mode.

[0093] In some embodiments, the judgment module is also specifically used to judge the switching state of the low-voltage power supply in the fuel cell system when the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range meets the preset threshold value; if the low-voltage power supply has not been switched, the low-voltage power supply is determined as a power supply state in which the fuel cell system needs to switch the low-voltage power supply; if the low-voltage power supply has been switched, the power supply state of the low-voltage power supply is determined according to the comparison result of the voltage change rate of the low-voltage power supply voltage and the second preset voltage change rate threshold; when the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range does not meet the preset threshold, the low-voltage power supply is determined as a power supply state in which the fuel cell system has not switched the low-voltage power supply.

[0094] In some embodiments, the judgment module is also specifically used to, if the low-voltage power supply has been switched, then when the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold, the low-voltage power supply is determined as a power supply state that requires the fuel cell system to jump to the shutdown mode; if the low-voltage power supply has been switched, then when the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold, the low-voltage power supply is determined as a power supply state that limits the power used by the fuel cell system.

[0095] In some embodiments, the control module is also specifically used to, when the low-voltage supply voltage is outside the preset operating voltage range, if the voltage change rate of the low-voltage supply voltage is greater than the first preset voltage change rate threshold, shut down the fuel cell system; if the voltage change rate of the low-voltage supply voltage is less than the first preset voltage change rate threshold, reduce the hydrogen and air pressures and DC output power of the fuel cell system, and control the fuel cell system to enter a shutdown state.

[0096] In some embodiments, the control module is also specifically used to determine the switching state of the low-voltage power supply in the fuel cell system when the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range meets the preset threshold value: if the low-voltage power supply has not been switched, the low-voltage power supply is switched to a backup power supply; if the low-voltage power supply has been switched, it is determined whether the voltage change rate of the low-voltage power supply voltage exceeds a second preset voltage change rate threshold; if the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold, the hydrogen and air pressures and DC output power of the fuel cell system are reduced, and the fuel cell system is controlled to enter a shutdown state; if the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold, the power usage of the fuel cell system is limited; when the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range does not meet the preset threshold, the low-voltage power supply is set to an unswitched state.

[0097] An embodiment of the present invention provides an electronic device for implementing an electronic device. In this embodiment, the electronic device may be, but is not limited to, a personal computer (PC), a laptop computer, a monitoring device, a server, or other computer device with analysis and processing capabilities.

[0098] As an exemplary embodiment, see Figure 4The electronic device 110 includes a communication interface 111, a processor 112, a memory 113 and a bus 114. The processor 112, the communication interface 111 and the memory 113 are connected via the bus 114. The memory 113 is used to store a computer program that supports the processor 112 to execute the method. The processor 112 is configured to execute the program stored in the memory 113.

[0099] The machine-readable storage medium mentioned in this article can be any electronic, magnetic, optical or other physical storage device that can contain or store information, such as executable instructions, data, etc. For example, the machine-readable storage medium can be: RAM (Radom Access Memory), volatile memory, non-volatile memory, flash memory, storage drive (such as hard disk drive), any type of storage disk (such as CD, DVD, etc.), or similar storage medium, or a combination thereof.

[0100] The non-volatile medium may be a non-volatile memory, a flash memory, a storage drive (such as a hard drive), any type of storage disk (such as a CD, DVD, etc.), or a similar non-volatile storage medium, or a combination thereof.

[0101] It can be understood that the specific operation methods of each functional module in this embodiment can refer to the detailed description of the corresponding steps in the above method embodiment, and will not be repeated here.

[0102] The computer-readable storage medium provided in the embodiment of the present invention stores a computer program. When the computer program code is executed, the method described in any of the above embodiments can be implemented. For specific implementation, please refer to the method embodiment, which will not be described in detail here.

[0103] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0104] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0105] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0106] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the aforementioned embodiments, those of ordinary skill in the art should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed by the present invention, or can easily conceive of changes, or make equivalent replacements for some of the technical features therein. Such modifications, changes 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 invention, and should all be covered within the protection scope of the present invention.

Claims

1. A low voltage power supply control method for a fuel cell system, characterized in that: include: Real-time monitoring of the low-voltage power supply voltage of the fuel cell system; Comparing the low-voltage power supply voltage with a preset working voltage range, and determining the power supply state of the low-voltage power supply according to the comparison result; According to the power supply state, the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system is controlled; wherein the low-voltage power supply is used to provide the low-voltage supply voltage for the fuel cell system.

2. The method according to claim 1, characterized in that The step of comparing the low-voltage power supply voltage with a preset working voltage range and determining the power supply state of the low-voltage power supply according to the comparison result comprises: When the low-voltage supply voltage is outside the preset operating voltage range, judging the power supply state of the low-voltage power supply according to a comparison result of the voltage change rate of the low-voltage supply voltage and a first preset voltage change rate threshold; When the low-voltage power supply voltage is within the preset operating voltage range, the power supply state of the low-voltage power supply is determined according to the switching state of the low-voltage power supply of the fuel cell system.

3. The method according to claim 2, characterized in that When the low-voltage supply voltage is outside the preset operating voltage range, the step of judging the power supply state of the low-voltage power supply according to the comparison result of the voltage change rate of the low-voltage supply voltage and the first preset voltage change rate threshold comprises: When the low-voltage supply voltage is outside the preset operating voltage range, determining whether a voltage change rate of the low-voltage supply voltage exceeds a first preset voltage change rate threshold; If the voltage change rate of the low-voltage power supply voltage is greater than the first preset voltage change rate threshold, the low-voltage power supply is determined to be in a power supply state that needs to be shut down to process the fuel cell system; If the voltage change rate of the low-voltage power supply voltage is less than the first preset voltage change rate threshold, the low-voltage power supply is determined to be a power supply state that requires the fuel cell system to jump to a shutdown mode.

4. The method according to claim 2, characterized in that: When the low-voltage power supply voltage is within the preset operating voltage range, the step of judging the power supply state of the low-voltage power supply according to the switching state of the low-voltage power supply in the fuel cell system comprises: When the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range meets the preset threshold value, the switching state of the low-voltage power supply of the fuel cell system is judged; if the low-voltage power supply has not been switched, the low-voltage power supply is determined as a power supply state that requires the fuel cell system to switch the low-voltage power supply; if the low-voltage power supply has been switched, the power supply state of the low-voltage power supply is determined based on the comparison result of the voltage change rate of the low-voltage power supply voltage and the second preset voltage change rate threshold; When the low-voltage supply voltage is within the preset operating voltage range and the difference between the low-voltage supply voltage and the boundary value of the preset operating voltage range does not meet the preset threshold, the low-voltage power supply is determined as a power supply state in which the fuel cell system has not switched to the low-voltage power supply.

5. The method according to claim 4, characterized in that If the low-voltage power supply has been switched, the step of determining the power supply state of the low-voltage power supply according to the comparison result of the voltage change rate of the low-voltage power supply voltage and the second preset voltage change rate threshold value includes: If the low-voltage power supply has been switched, when the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold, the low-voltage power supply is determined as a power supply state that requires the fuel cell system to jump to the shutdown mode; If the low-voltage power supply has been switched, when the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold, the low-voltage power supply is determined to be in a power supply state that limits the power used by the fuel cell system.

6. The method according to claim 3, characterized in that The step of controlling the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state includes: When the low-voltage supply voltage is outside the preset operating voltage range, if the voltage change rate of the low-voltage supply voltage is greater than the first preset voltage change rate threshold, the fuel cell system is shut down; if the voltage change rate of the low-voltage supply voltage is less than the first preset voltage change rate threshold, the hydrogen, air pressure and DC output power of the fuel cell system are reduced, and the fuel cell system is controlled to enter a shutdown state.

7. The method according to claim 5, characterized in that The step of controlling the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state includes: When the low-voltage power supply voltage is within the preset working voltage range and the difference between the low-voltage power supply voltage and the boundary value of the preset working voltage range meets the preset threshold, the switching state of the low-voltage power supply in the fuel cell system is determined: If the low-voltage power supply has not been switched, the low-voltage power supply is switched to a backup power supply; if the low-voltage power supply has been switched, it is determined whether the voltage change rate of the low-voltage power supply voltage exceeds a second preset voltage change rate threshold; If the voltage change rate of the low-voltage power supply voltage is greater than the second preset voltage change rate threshold, the hydrogen and air pressures and the DC output power of the fuel cell system are reduced, and the fuel cell system is controlled to enter a shutdown state; if the voltage change rate of the low-voltage power supply voltage is less than the second preset voltage change rate threshold, the power usage of the fuel cell system is limited; When the low-voltage supply voltage is within the preset operating voltage range and the difference between the low-voltage supply voltage and the boundary value of the preset operating voltage range does not meet the preset threshold, the low-voltage power supply is set to a non-switched state.

8. A low voltage power supply control device for a fuel cell system, characterized in that: include: Monitoring module, real-time monitoring of the low-voltage power supply voltage of the fuel cell system; A judgment module compares the low-voltage power supply voltage with a preset working voltage range, and judges the power supply state of the low-voltage power supply according to the comparison result; A control module controls the working state of the fuel cell system or the switching state of the low-voltage power supply of the fuel cell system according to the power supply state; wherein the low-voltage power supply is used to provide the low-voltage supply voltage for the fuel cell system.

9. An electronic device, characterized in that: The method comprises a memory, a processor, and a program stored in the memory and capable of being run on the processor, wherein the processor implements the method according to any one of claims 1 to 7 when executing the program.

10. A computer-readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 7 is implemented.

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