Gas-electric forklift energy management method and system capable of replacing solid hydrogen storage module

Abstract

The invention discloses an energy management method and system for a gas-electric forklift with a replaceable solid hydrogen storage module, and the method comprises the steps: obtaining a driving mode, and calculating a corresponding SOC demand according to the driving mode; controlling the power battery system to heat a solid-state hydrogen storage module in the solid-state hydrogen storage system according to the SOC demand, so that the solid-state hydrogen storage module releases hydrogen to start the fuel battery system; and the current of the fuel cell stack is obtained in real time, when the current of the fuel cell stack reaches a preset value, the fuel cell system is controlled to heat the solid hydrogen storage system and supplement energy to the power cell system, and energy management of the gas-electric forklift after the solid hydrogen storage module is replaced is achieved. Through fine control of energy management, efficient and stable hydrogen supply of the solid-state hydrogen storage system after the solid-state hydrogen storage module is replaced is achieved, and the operation safety and the attendance rate of the gas-electric forklift are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy management of fuel-electric forklifts, and in particular relates to an energy management method and system for fuel-electric forklifts with replaceable solid-state hydrogen storage modules. Background Art

[0002] As a new type of clean and pollution-free energy, hydrogen has been receiving continuous attention from countries around the world in recent years. Research by the World Watch Organization shows that the proportion of hydrogen energy in the future energy usage structure will continue to grow. Solid-state hydrogen storage has the advantages of large hydrogen storage capacity, simple storage conditions and long service life. The characteristics of solid-state hydrogen storage using metal alloys are large storage capacity and safer use process, but stable hydrides need to be dehydrogenated (dehydrogenated) at higher temperatures. Metal hydrides release hydrogen when heated, a process called desorption.

[0003] The main advantages of fuel cell forklifts include: zero emission, low noise, and fast hydrogen refueling. Compared with internal combustion engine forklifts, fuel cell forklifts have no emissions except water, and the noise is also very low. They can be used in various occasions with requirements for air environment, such as fresh food warehouses. At the same time, the operating temperature of the fuel cell system is generally 50~80℃, which can effectively match the dehydrogenation temperature requirements of solid-state hydrogen storage.

[0004] Invention patent CN102837696B discloses a fuel cell forklift hybrid power control system with online monitoring function. It has a structural form of a mixed configuration of three energy sources: fuel cell, auxiliary lithium battery and supercapacitor. It uses fuzzy control to achieve energy management, and uses embedded system technology, GPS technology, CAN bus management technology, CDMA and other wireless transmission technologies to achieve control and adjustment of the working performance of fuel cells and lithium batteries. It has the functions of fuel cell performance control, energy output management, lithium battery energy management, multiple energy output management and wireless monitoring of the operating status of fuel cell forklifts.

[0005] Existing fuel cell forklift control systems (such as the aforementioned invention patent CN102837696B) are too complicated, and mainly use fuzzy control in energy management. There is a lack of refined management of energy flow for fixed application scenarios. This results in a lack of matching energy control methods to quickly put the solid-state hydrogen storage module into operation after it is replaced. It takes time to reset the energy control system, etc., resulting in insufficient attendance of fuel-electric forklifts. Moreover, the fuzzy control of energy management can easily lead to an inability to provide stable hydrogen supply, posing a safety risk. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an energy management method and system for a fuel-electric forklift with a replaceable solid-state hydrogen storage module. Through the refined control of energy management, efficient and stable hydrogen supply of the solid-state hydrogen storage system is achieved after the solid-state hydrogen storage module is replaced, thereby improving the operating safety and attendance rate of the fuel-electric forklift.

[0007] The present invention provides the following technical solutions: In a first aspect, a method for energy management of a fuel-electric forklift with a replaceable solid-state hydrogen storage module is provided, comprising: Obtain driving mode and calculate corresponding SOC requirement according to the driving mode; According to the SOC requirement, the power battery system is controlled to heat the solid-state hydrogen storage module in the solid-state hydrogen storage system, so that the solid-state hydrogen storage module releases hydrogen to start the fuel cell system; The fuel cell stack current is obtained in real time. When the fuel cell stack current reaches a preset value, the fuel cell system is controlled to heat the solid-state hydrogen storage system and replenish the power battery system, thereby realizing energy management of the fuel-electric forklift after replacing the solid-state hydrogen storage module.

[0008] Furthermore, it also includes: obtaining the remaining hydrogen of the solid-state hydrogen storage module from the solid-state hydrogen storage system, and when the remaining hydrogen of the solid-state hydrogen storage module is lower than a preset value, outputting a hydrogen exchange request to the outside.

[0009] Furthermore, the driving modes include a long endurance mode and a high response mode.

[0010] Furthermore, in the long endurance mode, the calculation formula for SOC requirement is as follows: ; in, SOC 1 represents the proportion of remaining power of the power battery in long-range mode, W f Indicates the electrical energy released by the power battery in long-range mode. W s Indicates the total electrical energy of the power battery.

[0011] Furthermore, in the high response mode, the calculation formula of SOC requirement is as follows: ; in, SOC 2 represents the proportion of remaining power of the power battery in high response mode. W s Indicates the total electrical energy of the power battery. Indicates the electrical energy released by the power battery in high response mode.

[0012] Furthermore, the method of controlling the power battery system to heat the solid-state hydrogen storage module in the solid-state hydrogen storage system according to the SOC demand so that the solid-state hydrogen storage module releases hydrogen to start the fuel cell system includes: Output the SOC demand to the BMS management system of the power battery system, and the BMS management system controls the power reserve of the power battery; When the fuel-electric forklift is started, the power battery is controlled to heat the cooling subsystem, and the solid-state hydrogen storage module is heated by heat exchange between the cooling subsystem and the solid-state hydrogen storage module; When the temperature of the cooling subsystem and the solid-state hydrogen storage module reaches the target temperature, the solid-state hydrogen storage module starts to release hydrogen; The dehydrogenation pressure of the solid-state hydrogen storage module is obtained in real time, and when the dehydrogenation pressure reaches the target pressure, the fuel cell system is started.

[0013] Furthermore, the calculation formula for the heat required to release hydrogen after the temperature of the solid-state hydrogen storage module reaches the target temperature is as follows: ; in, It indicates the heat required for the solid-state hydrogen storage module to heat up to release hydrogen. c represents the specific heat capacity of the coolant in the cooling subsystem, m Indicates the quality of the coolant. T 1 indicates the initial temperature of the coolant after replacing the solid hydrogen storage module. T 2 represents the target temperature that the solid-state hydrogen storage module needs to reach to release hydrogen.

[0014] Furthermore, the energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module further includes: When the fuel cell system is started, the fuel cell stack current is obtained and the fuel cell stack voltage is calculated synchronously. The formula is as follows: ; in, E represents the fuel cell stack voltage, φ represents the fuel cell stack efficiency, E ϴ Indicates the standard voltage of hydrogen-oxygen reaction under standard conditions, R is the ideal gas constant, T 2 represents the target temperature that the solid-state hydrogen storage module needs to reach to release hydrogen. F is the Faraday constant, represents the hydrogen partial pressure during the reaction, Indicates the oxygen partial pressure during the reaction; The electric energy released by the power battery is calculated based on the fuel cell stack current and fuel cell stack voltage. The formula is as follows: ; in, W f Indicates the electrical energy released by the power battery in long-range mode. Indicates the electrical energy released by the power battery in high response mode. I represents the fuel cell stack current, t Indicates the fuel cell stack startup time; The energy required to start the cathode circuit of the fuel cell is calculated based on the electric energy released by the power battery in the long-range mode. The formula is as follows: ; in, Indicates the energy required to start the cathode circuit of the fuel cell. It indicates the heat required to heat the solid hydrogen storage module to release hydrogen; Alternatively, the energy required to start the cathode circuit of the fuel cell is calculated based on the electrical energy released by the power battery in high response mode. The formula is as follows: ; in, Indicates the peak energy required during the operation of a fuel-electric forklift.

[0015] In a second aspect, a fuel-electric forklift energy management system with a replaceable solid-state hydrogen storage module is provided, comprising a VCU and a driving mode input module, a power battery system, a solid-state hydrogen storage system and a fuel cell system respectively connected to the VCU, wherein the power battery system and the fuel cell system are respectively connected to the solid-state hydrogen storage system; The driving mode input module is used to input the driving mode and transmit the driving mode to the VCU; the VCU is used to output a hydrogen replacement request to the outside, and after replacing the solid-state hydrogen storage module in the solid-state hydrogen storage system, execute the method described in the first aspect.

[0016] Furthermore, the power battery system includes a BMS management system and a power battery, and the BMS management system is used to control the power reserve of the power battery according to the SOC requirement; The solid-state hydrogen storage system includes a cooling subsystem and a solid-state hydrogen storage module. The cooling subsystem is used to heat the solid-state hydrogen storage module by performing heat exchange with the solid-state hydrogen storage module after being heated by the power battery.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The energy management method and system for a fuel-electric forklift provided by the present invention, after replacing the solid-state hydrogen storage module, obtains the driving mode and calculates the corresponding SOC demand according to the driving mode, controls the power battery system to heat the solid-state hydrogen storage module in the solid-state hydrogen storage system according to the SOC demand, and makes the solid-state hydrogen storage module release hydrogen to start the fuel cell system, and obtains the fuel cell stack current in real time. When the fuel cell stack current reaches a preset value, the fuel cell system is controlled to heat the solid-state hydrogen storage system and replenish the power battery system. On the one hand, the refined control of energy management realizes efficient and stable hydrogen supply of the solid-state hydrogen storage system after the solid-state hydrogen storage module is replaced, thereby improving the operating safety and attendance rate of the fuel-electric forklift. On the other hand, by calculating the corresponding SOC demand under different driving modes, it can meet the requirements of different mode working conditions such as long endurance and high efficiency of the fuel-electric forklift, thereby broadening the application and promotion scenarios of replaceable solid-state hydrogen storage fuel-electric forklifts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of an energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module in an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a fuel-electric forklift energy management system with replaceable solid-state hydrogen storage modules in an embodiment of the present invention; Figure 3 1 is an energy management architecture diagram of a fuel-electric forklift energy management system with replaceable solid-state hydrogen storage modules in an embodiment of the present invention.

[0019] The markings in the figure are: 1. VCU; 2. Solid-state hydrogen storage system; 3. Power battery; 4. Fuel cell system; 5. Switch; 6. Driving mode input module; 7. BMS management system. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] Example 1

[0022] like Figure 1 As shown, this embodiment provides an energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module, and the steps are as follows: Step 1: Obtain the remaining hydrogen amount of the solid-state hydrogen storage module from the solid-state hydrogen storage system. When the remaining hydrogen amount of the solid-state hydrogen storage module is lower than a preset value, output a hydrogen exchange request to the outside.

[0023] Step 2: After the solid-state hydrogen storage module is replaced, the driving mode is obtained and the corresponding SOC requirement is calculated according to the driving mode. The driving mode includes a long-range mode and a high-response mode.

[0024] In the long endurance mode, the calculation formula of SOC requirement is as follows: ; in, SOC 1 represents the proportion of remaining power of the power battery in long-range mode, W f Indicates the electrical energy released by the power battery in long-range mode. W s Indicates the total electrical energy of the power battery.

[0025] In the high response mode, the calculation formula of SOC requirement is as follows: ; in, SOC 2 represents the proportion of remaining power of the power battery in high response mode. W s Indicates the total electrical energy of the power battery. Indicates the electrical energy released by the power battery in high response mode.

[0026] Step 3: According to the SOC requirement, the power battery system is controlled to heat the solid-state hydrogen storage module in the solid-state hydrogen storage system, so that the solid-state hydrogen storage module releases hydrogen to start the fuel cell system. The specific method is as follows: Step 3.1: Output the SOC demand to the BMS management system of the power battery system, and the BMS management system controls the power reserve of the power battery.

[0027] Step 3.2: When the fuel-electric forklift is started, the power battery is controlled to heat the cooling subsystem, and the solid-state hydrogen storage module is heated by heat exchange between the cooling subsystem and the solid-state hydrogen storage module.

[0028] Step 3.3: When the temperature of the cooling subsystem and the solid-state hydrogen storage module reaches the target temperature, the solid-state hydrogen storage module starts to release hydrogen.

[0029] The calculation formula for the heat required to release hydrogen after the temperature of the solid-state hydrogen storage module reaches the target temperature is as follows: ; in, It indicates the heat required for the solid-state hydrogen storage module to heat up to release hydrogen. c represents the specific heat capacity of the coolant in the cooling subsystem, m Indicates the quality of the coolant. T 1 indicates the initial temperature of the coolant after replacing the solid hydrogen storage module. T 2 represents the target temperature that the solid-state hydrogen storage module needs to reach to release hydrogen.

[0030] Step 3.4: Obtain the dehydrogenation pressure of the solid-state hydrogen storage module in real time. When the dehydrogenation pressure reaches the target pressure, the fuel cell system is started.

[0031] Step 3.5: When the fuel cell system is started, the fuel cell stack current is obtained and the fuel cell stack voltage is calculated synchronously. The formula is as follows: ; in, E represents the fuel cell stack voltage, φ represents the fuel cell stack efficiency, E ϴ Indicates the standard voltage of hydrogen-oxygen reaction under standard conditions, R is the ideal gas constant, T 2 represents the target temperature that the solid-state hydrogen storage module needs to reach to release hydrogen. F is the Faraday constant, represents the hydrogen partial pressure during the reaction, It represents the oxygen partial pressure during the reaction.

[0032] Step 3.6: Calculate the electric energy released by the power battery according to the fuel cell stack current and the fuel cell stack voltage. The formula is as follows: ; in, W f Indicates the electrical energy released by the power battery in long-range mode. Indicates the electrical energy released by the power battery in high response mode. I represents the fuel cell stack current, t Indicates the fuel cell stack startup time.

[0033] Step 3.7: Calculate the energy required to start the cathode circuit of the fuel cell based on the electric energy released by the power battery in the long-range mode. The formula is as follows: ; in, Indicates the energy required to start the cathode circuit of the fuel cell. It indicates the heat required to heat the solid hydrogen storage module to release hydrogen; Alternatively, the energy required to start the cathode circuit of the fuel cell is calculated based on the electrical energy released by the power battery in high response mode. The formula is as follows: ; in, Indicates the peak energy required during the operation of a fuel-electric forklift.

[0034] Step 4: Obtain the fuel cell stack current in real time. When the fuel cell stack current reaches a preset value, control the fuel cell system to heat the solid-state hydrogen storage system and replenish the power battery system, thereby realizing energy management of the fuel-electric forklift after replacing the solid-state hydrogen storage module.

[0035] Example 2

[0036] like Figure 2 As shown, this embodiment provides a fuel-electric forklift energy management system with a replaceable solid-state hydrogen storage module, including a VCU 1 and a driving mode input module 6, a power battery system, a solid-state hydrogen storage system 2 and a fuel cell system 4 respectively connected to the VCU 1, and the power battery system and the fuel cell system 4 are respectively connected to the solid-state hydrogen storage system 2.

[0037] The driving mode input module 6 is used to input the driving mode and transmit the driving mode to the VCU 1; the power battery system 3 includes a BMS management system 7 and a power battery 3, and the BMS management system 7 is used to control the power reserve of the power battery 3 according to the SOC requirement; the solid-state hydrogen storage system 2 includes a cooling subsystem and a solid-state hydrogen storage module, and the cooling subsystem is used to heat the solid-state hydrogen storage module after being heated by the power battery, and then heat the solid-state hydrogen storage module. The VCU1 is used to output a hydrogen exchange request to the outside, and after replacing the solid-state hydrogen storage module in the solid-state hydrogen storage system, execute the method described in Example 1.

[0038] like Figure 3 As shown, Figure 2 The corresponding energy management architecture diagram shows that the entire control system uses the vehicle VCU as the central control unit. The primary system includes the solid-state hydrogen storage system, fuel cell system and power battery system; the secondary subsystem is the actuator of the primary system, mainly including the cooling subsystem and the replaceable solid-state hydrogen storage module.

[0039] like Figure 2 and Figure 3 As shown, the working principle of the energy management system for fuel-electric forklifts in this embodiment is as follows: Step 1: VCU 1 obtains the remaining hydrogen amount of the solid-state hydrogen storage module from the solid-state hydrogen storage system 2. When the remaining hydrogen amount of the solid-state hydrogen storage module is lower than a preset value, a hydrogen exchange request is outputted to the outside.

[0040] Step 2: After the driver replaces the solid-state hydrogen storage module, the self-driving mode input module 6 inputs the driving mode, that is, the long-endurance mode or the high-response mode, and the driving mode input module 6 transmits the driving mode information to the VCU 1.

[0041] Step 3, VCU 1 outputs the corresponding SOC demand control algorithm to the BMS management system 7 according to the acquired driving mode, which controls the power reserve of the power battery 3. When the fuel-electric forklift is started, the initial temperature of the coolant in the cooling subsystem is T1, the switch 5 is switched to S1, the power battery 3 heats the cooling subsystem to make the temperature reach T2, and the solid-state hydrogen storage module is heated to T2 through heat exchange between the cooling subsystem and the solid-state hydrogen storage module, and the solid-state hydrogen storage module begins to release hydrogen. VCU 1 obtains the signal of the hydrogen release pressure P of the solid-state hydrogen storage module, and when the hydrogen release pressure reaches the target pressure, the fuel cell system 4 is started.

[0042] Step 4, VCU 1 obtains the fuel cell stack current I in real time. When the fuel cell stack current I reaches a preset value, the switch is switched to S2, and the fuel cell system 4 heats the cooling subsystem, thereby heating the solid-state hydrogen storage module, and simultaneously performing energy replenishment operation on the power battery 3, thereby achieving efficient and stable operation of the fuel-electric forklift after replacing the hydrogen storage module.

[0043] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0044] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0045] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0046] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for energy management of a fuel-electric forklift with a replaceable solid-state hydrogen storage module, characterized in that: include: Obtain driving mode and calculate corresponding SOC requirement according to the driving mode; According to the SOC requirement, the power battery system is controlled to heat the solid-state hydrogen storage module in the solid-state hydrogen storage system, so that the solid-state hydrogen storage module releases hydrogen to start the fuel cell system; The fuel cell stack current is obtained in real time. When the fuel cell stack current reaches a preset value, the fuel cell system is controlled to heat the solid-state hydrogen storage system and replenish the power battery system, thereby realizing energy management of the fuel-electric forklift after replacing the solid-state hydrogen storage module.

2. The energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module according to claim 1 is characterized in that: Also includes: The remaining hydrogen amount of the solid-state hydrogen storage module is obtained from the solid-state hydrogen storage system. When the remaining hydrogen amount of the solid-state hydrogen storage module is lower than a preset value, a hydrogen exchange request is output externally.

3. The energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module according to claim 1, characterized in that: The driving modes include a long endurance mode and a high response mode.

4. The energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module according to claim 3 is characterized in that: In the long endurance mode, the calculation formula of SOC requirement is as follows: ； in, SOC 1 represents the proportion of remaining power of the power battery in long-range mode, W f Indicates the electrical energy released by the power battery in long-range mode. W s Indicates the total electrical energy of the power battery.

5. The energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module according to claim 3 is characterized in that: In the high response mode, the calculation formula of SOC requirement is as follows: ； in, SOC 2 represents the proportion of remaining power of the power battery in high response mode. W s Indicates the total electrical energy of the power battery. Indicates the electrical energy released by the power battery in high response mode.

6. The energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module according to claim 1, characterized in that: The method of controlling the power battery system to heat the solid-state hydrogen storage module in the solid-state hydrogen storage system according to the SOC demand so that the solid-state hydrogen storage module releases hydrogen to start the fuel cell system includes: Output the SOC demand to the BMS management system of the power battery system, and the BMS management system controls the power reserve of the power battery; When the fuel-electric forklift is started, the power battery is controlled to heat the cooling subsystem, and the solid-state hydrogen storage module is heated by heat exchange between the cooling subsystem and the solid-state hydrogen storage module; When the temperature of the cooling subsystem and the solid-state hydrogen storage module reaches the target temperature, the solid-state hydrogen storage module starts to release hydrogen; The dehydrogenation pressure of the solid-state hydrogen storage module is obtained in real time, and when the dehydrogenation pressure reaches the target pressure, the fuel cell system is started.

7. The energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module according to claim 6, characterized in that: The calculation formula for the heat required to release hydrogen after the temperature of the solid-state hydrogen storage module reaches the target temperature is as follows: ； in, It indicates the heat required for the solid-state hydrogen storage module to heat up to release hydrogen. c represents the specific heat capacity of the coolant in the cooling subsystem, m Indicates the quality of the coolant. T 1 indicates the initial temperature of the coolant after replacing the solid hydrogen storage module. T 2 represents the target temperature that the solid-state hydrogen storage module needs to reach to release hydrogen.

8. The energy management method for a fuel-electric forklift with a replaceable solid-state hydrogen storage module according to claim 1, characterized in that: Also includes: When the fuel cell system is started, the fuel cell stack current is obtained and the fuel cell stack voltage is calculated synchronously. The formula is as follows: ； in, E represents the fuel cell stack voltage, φ represents the fuel cell stack efficiency, E ϴ Indicates the standard voltage of hydrogen-oxygen reaction under standard conditions, R is the ideal gas constant, T 2 represents the target temperature that the solid-state hydrogen storage module needs to reach to release hydrogen. F is the Faraday constant, represents the hydrogen partial pressure during the reaction, Indicates the oxygen partial pressure during the reaction; The electric energy released by the power battery is calculated based on the fuel cell stack current and fuel cell stack voltage. The formula is as follows: ； in, W f Indicates the electrical energy released by the power battery in long-range mode. Indicates the electrical energy released by the power battery in high response mode. I represents the fuel cell stack current, t Indicates the fuel cell stack startup time; The energy required to start the cathode circuit of the fuel cell is calculated based on the electric energy released by the power battery in the long-range mode. The formula is as follows: ； in, Indicates the energy required to start the cathode circuit of the fuel cell. It indicates the heat required to heat the solid hydrogen storage module to release hydrogen; Alternatively, the energy required to start the cathode circuit of the fuel cell is calculated based on the electrical energy released by the power battery in high response mode. The formula is as follows: ； in, Indicates the peak energy required during the operation of a fuel-electric forklift.

9. A fuel-electric forklift energy management system with replaceable solid-state hydrogen storage modules, characterized in that: It includes a VCU and a driving mode input module, a power battery system, a solid-state hydrogen storage system and a fuel cell system respectively connected to the VCU, wherein the power battery system and the fuel cell system are respectively connected to the solid-state hydrogen storage system; The driving mode input module is used to input the driving mode and transmit the driving mode to the VCU; the VCU is used to output a hydrogen replacement request to the outside, and after replacing the solid-state hydrogen storage module in the solid-state hydrogen storage system, execute the method described in any one of claims 1 to 8.

10. The fuel-electric forklift energy management system with replaceable solid-state hydrogen storage module according to claim 9, characterized in that: The power battery system includes a BMS management system and a power battery, wherein the BMS management system is used to control the power reserve of the power battery according to the SOC requirement; The solid-state hydrogen storage system includes a cooling subsystem and a solid-state hydrogen storage module. The cooling subsystem is used to heat the solid-state hydrogen storage module by performing heat exchange with the solid-state hydrogen storage module after being heated by the power battery.

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