Quick-change solid hydrogen storage fuel cell power system and hydrogen fuel cell forklift

Abstract

The invention discloses a quick-change solid hydrogen storage fuel cell power system and a hydrogen fuel cell forklift, relates to the technical field of hydrogen fuel cells, and aims to solve the problems of high maintenance difficulty, low integration level and the like of a fuel cell power system for a forklift in the prior art. A fuel cell system, a solid hydrogen storage system and an energy storage cell are sequentially arranged in the main body frame from top to bottom; the solid hydrogen storage system is used for supplying hydrogen to the fuel cell system, and the energy storage battery is used for supplying electric energy when the fuel cell system is started and storing the electric energy generated by the fuel cell system; a mounting bottom plate is arranged on the level where the solid hydrogen storage system is located, and the solid hydrogen storage system comprises a solid hydrogen storage accessory and a solid hydrogen storage module arranged on the mounting bottom plate in a sliding mode. The device is high in integration level and convenient to repair and maintain, and quick energy supplementation can be achieved through quick replacement of the solid hydrogen storage module.

Description

Technical Field

[0001] The invention relates to a quick-change solid-state hydrogen storage fuel cell power system and a hydrogen fuel cell forklift, belonging to the technical field of hydrogen fuel cells. Background Art

[0002] As a new energy forklift, hydrogen fuel cell forklift mainly uses hydrogen as its power source. It outputs electricity through chemical reactions to drive the motor or store energy in the battery, which can achieve zero carbon emissions and make up for the shortcomings of fuel forklifts and electric forklifts.

[0003] At present, the fuel cell power system for forklifts includes three parts: fuel cell system, hydrogen storage system, and energy storage battery. The existing technology integrates the three parts together, the internal structure is complex, the power system is not arranged in layers, the system integration is not high, and the subsequent maintenance is difficult. In addition, as a special equipment, the lack of hydrogen refueling stations in the surrounding area will restrict the use of forklifts.

[0004] Therefore, it is necessary to design a new fuel cell forklift power system to facilitate system maintenance, increase the application scenarios of fuel cell forklifts, and not be restricted by hydrogen refueling stations. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a quick-change solid-state hydrogen storage fuel cell power system and a hydrogen fuel cell forklift, which have high integration and are easy to repair and maintain, and can achieve rapid energy replenishment through quick replacement of solid-state hydrogen storage modules.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions: On the one hand, the present invention provides a quick-change solid-state hydrogen storage fuel cell power system, comprising a main frame, the main frame comprising a plurality of levels, the levels being sequentially provided with a fuel cell system, a solid-state hydrogen storage system and an energy storage battery from top to bottom; the solid-state hydrogen storage system is used to supply hydrogen to the fuel cell system, the energy storage battery is used to supply electric energy when the fuel cell system is started, and store the output electric energy of the fuel cell system; An installation base plate is arranged on the level where the solid-state hydrogen storage system is located. The solid-state hydrogen storage system includes a solid-state hydrogen storage auxiliary component and a solid-state hydrogen storage module slidably arranged on the installation base plate. The solid-state hydrogen storage module is used to store hydrogen, and the solid-state hydrogen storage auxiliary component is used to provide coolant for the solid-state hydrogen storage module and regulate the hydrogen pressure.

[0007] Furthermore, the solid-state hydrogen storage module includes a solid-state hydrogen storage package and a pipeline, a pulley block is provided at the bottom of the solid-state hydrogen storage package and the pipeline, a guide rail is provided on the mounting base plate, and the pulley block is slidably connected to the guide rail.

[0008] Further, the solid-state hydrogen storage package and pipeline are provided with a first quick-plug coolant inlet, a first quick-plug coolant outlet, a first quick-plug hydrogen inlet and a first quick-plug hydrogen outlet; The solid-state hydrogen storage auxiliary component includes a solid-state hydrogen storage BOP assembly, which is provided with a coolant outlet, a coolant inlet, a hydrogen discharge port, and a hydrogen filling port. The solid-state hydrogen storage BOP assembly is also provided with a second quick-plug coolant outlet, a second quick-plug coolant inlet, a second quick-plug hydrogen outlet, and a second quick-plug hydrogen inlet; The first quick-plug coolant inlet and the second quick-plug coolant outlet, the first quick-plug coolant outlet and the second quick-plug coolant inlet, the first quick-plug hydrogen inlet and the second quick-plug hydrogen outlet, and the first quick-plug hydrogen outlet and the second quick-plug hydrogen inlet are connected in a one-to-one correspondence.

[0009] Furthermore, a baffle is provided on one side of the mounting base plate away from the sliding-out end of the solid-state hydrogen storage module.

[0010] Furthermore, it also includes a push-type limit block, which is arranged on both sides of the lower front part of the solid-state hydrogen storage module, and limit holes are provided on the mounting base plate located on both sides of the lower front part of the solid-state hydrogen storage module, and the limit holes correspond to the push-type limit blocks. The push-type limit blocks can be extended into the limit holes by pressing to achieve the limitation of the fixed hydrogen storage module.

[0011] Furthermore, the solid-state hydrogen storage system is connected to the fuel cell system through a hydrogen pipeline, the power output end of the energy storage battery is connected to the power input end of the fuel cell system, and the power output end of the fuel cell system is connected to the power input end of the energy storage battery; The fuel cell system includes a fuel cell stack, an air subsystem, a water thermal management subsystem, a hydrogen subsystem and a FCCU controller; The battery stack is used to generate electric energy, and its electric energy output end is connected to the electric energy input end of the energy storage battery through a DCDC converter, and the DCDC converter is air-cooled; The air subsystem includes a blower and an air filter. The blower delivers air to the fuel cell system through a pipeline, and the air outlet of the air filter is connected to the air inlet of the blower. The water thermal management subsystem is used to dissipate heat for the battery stack or to heat it during a low-temperature cold start; The hydrogen subsystem is used to transport hydrogen from the solid-state hydrogen storage module to the fuel cell stack, and is connected to the solid-state hydrogen storage module; The FCCU controller is used to control the electrical and electronic control components in the fuel cell system.

[0012] Furthermore, the air subsystem and the hydrogen subsystem are both connected to a mixed gas outlet, and the mixed gas outlet is used to mix the air and hydrogen in the air subsystem and the hydrogen subsystem and then discharge them; The hydrogen subsystem and the air subsystem are both connected to an electronic drain valve, which is used to discharge liquid water in the hydrogen subsystem and the air subsystem and is provided with a drain port; The water thermal management subsystem is provided with a water replenishment port, and the water replenishment port is used to replenish coolant for the water thermal management subsystem; The FCCU controller is provided with a low-voltage line interface, and the low-voltage line interface is connected to an external controller; The electrical and electronic control components in the fuel cell system are connected to a ground bus, and the ground bus is used to reduce the potential difference of the fuel cell system.

[0013] Furthermore, the energy storage battery is provided with a high-voltage line interface and a battery charging port, and the high-voltage line interface is connected to an external power system.

[0014] Furthermore, the mixed gas outlet, drain outlet, water supply outlet, low-voltage line interface, ground bus, high-voltage line interface, and battery charging port are all arranged on the outer side of the main frame.

[0015] On the other hand, the present invention also provides a hydrogen fuel cell forklift, comprising a quick-change solid-state hydrogen storage fuel cell power system as described in any of the above items; the low-voltage line interface in the quick-change solid-state hydrogen storage fuel cell power system is connected to the forklift controller, the high-voltage line interface is connected to the forklift drive motor, and the ground bus is connected to the forklift body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The fuel cell system, solid-state hydrogen storage system and energy storage battery in the quick-change solid-state hydrogen storage fuel cell power system provided by the present invention are arranged in multiple layers. The bottom layer is the energy storage battery, which can replace the counterweight block at the bottom of the forklift. The middle layer is the solid-state hydrogen storage system, which reduces the center of gravity of the overall structure and facilitates the quick replacement of the solid-state hydrogen storage module. The top layer is the fuel cell system, which is convenient for maintenance, which not only improves the integration of the power system, but also facilitates the maintenance of the overall system. The present invention has a regular internal structure and a modular solid-state hydrogen storage system. The solid-state hydrogen storage module is slidably arranged on the mounting base plate, so that the solid-state hydrogen storage module can be quickly replaced or hydrogen can be charged to achieve energy replenishment, and temporary emergency response can be achieved by charging when there is no solid-state hydrogen storage module to replace or no hydrogen to be added, without being restricted by hydrogen filling stations; The quick-change solid-state hydrogen storage fuel cell power system of the present invention is suitable for most forklifts. The air compressor is replaced by a blower, and the DCDC converter adopts air cooling to eliminate the auxiliary water channel to improve the regularity of the internal space of the forklift. All interfaces are located at the edge of the main frame, which is more convenient for use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a quick-change solid-state hydrogen storage fuel cell power system in one embodiment of the present invention; Figure 2 It is a schematic diagram of the main structure of a quick-change solid-state hydrogen storage fuel cell power system in one embodiment of the present invention; Figure 3 A schematic structural diagram of a solid-state hydrogen storage system of a quick-change solid-state hydrogen storage fuel cell power system in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a solid-state hydrogen storage module of a quick-change solid-state hydrogen storage fuel cell power system in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a solid-state hydrogen storage auxiliary component and a mounting base plate of a quick-change solid-state hydrogen storage fuel cell power system in an embodiment of the present invention; Figure 6 A schematic diagram of the component structure of a hydrogen fuel cell forklift in one embodiment of the present invention; In the figure: 1-fuel cell system, 2-solid-state hydrogen storage system, 21-solid-state hydrogen storage module, 22-solid-state hydrogen storage accessories, 211-solid-state hydrogen storage packaging and pipelines, 212-press-type limit block, 213-pulley block, 221-solid-state hydrogen storage BOP assembly, 222-installation base plate, 223-guide rail, 224-baffle, 2221-limiting hole, 3-energy storage battery, 4-main frame, 11-air filter, 12-blower, 13-DCDC converter, 14-electronic drain valve; A-battery charging port, B-water filling port, C-low-voltage line interface, D-mixed gas outlet, E-high-voltage line interface, F-ground bus, H-coolant outlet, I-hydrogen discharge port, J-hydrogen filling port, K-coolant inlet, L1-first quick-plug coolant inlet, M1-first quick-plug coolant outlet, N1-first quick-plug hydrogen inlet, O1-first quick-plug hydrogen outlet, L2-second quick-plug coolant outlet, M2-second quick-plug coolant inlet, N2-second quick-plug hydrogen outlet, O2-second quick-plug hydrogen inlet. DETAILED DESCRIPTION

[0018] 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. Example 1

[0019] like Figure 1As shown, an embodiment of the present invention provides a quick-change solid-state hydrogen storage fuel cell power system, including a main frame 4, which is divided into three layers, and is provided with a fuel cell system 1, a solid-state hydrogen storage system 2 and an energy storage battery 3 from top to bottom.

[0020] The solid-state hydrogen storage system 2 is used to provide hydrogen to the fuel cell system 1, and it is connected to the fuel cell system 1 through a hydrogen pipeline. The energy storage battery 3 is used to supply electrical energy to the fuel cell system 1 on the one hand, and its electrical energy output end is connected to the electrical energy input end of the fuel cell system 1. On the other hand, it supplies electrical energy to the external power system, and it is connected to the external power system through the high-voltage line interface E.

[0021] When the fuel cell system 1 is started, the energy storage battery 3 supplies electric energy to the fuel cell system 1. After the fuel cell system 1 is started, it generates electric energy and transmits it to the energy storage battery 3. The electric energy output end of the fuel cell system 1 is connected to the electric energy input end of the energy storage battery 3.

[0022] The solid-state hydrogen storage system 2 includes a solid-state hydrogen storage module 21 and a solid-state hydrogen storage auxiliary 22 that are interconnected. The solid-state hydrogen storage module 21 includes a solid-state hydrogen storage package and pipeline 211. The solid-state hydrogen storage package and pipeline 211 are provided with a first quick-plug coolant inlet L1, a first quick-plug coolant outlet M1, a first quick-plug hydrogen inlet N1, and a first quick-plug hydrogen outlet O1. The solid-state hydrogen storage auxiliary 22 includes a solid-state hydrogen storage BOP assembly 221. The solid-state hydrogen storage BOP assembly 221 is provided with a second quick-plug coolant outlet L2, a second quick-plug coolant inlet M2, a second quick-plug hydrogen outlet N2, and a second quick-plug hydrogen inlet O2. The first quick-plug coolant inlet L1 and the second quick-plug coolant outlet L2, the first quick-plug coolant outlet M1 and the second quick-plug coolant inlet M2, the first quick-plug hydrogen inlet N1 and the second quick-plug hydrogen outlet N2, and the first quick-plug hydrogen outlet O1 and the second quick-plug hydrogen inlet O1 are connected one-to-one.

[0023] The solid-state hydrogen storage BOP assembly 221 is provided with a coolant outlet H, a coolant inlet K, a hydrogen discharge port I, and a hydrogen filling port J. The hydrogen filling port J is used to increase the amount of hydrogen. When the solid-state hydrogen storage module is quickly replaced, a small amount of air may enter. This small amount of air can be discharged through the hydrogen discharge port I to improve the purity of the hydrogen.

[0024] The solid-state hydrogen storage module 21 and the solid-state hydrogen storage auxiliary component 22 are both arranged on the mounting base plate 222. The solid-state hydrogen storage auxiliary component 22 is fixedly connected to the mounting base plate 222, and the solid-state hydrogen storage module 21 is slidably connected to the mounting base plate 222. In this embodiment, the sliding connection is achieved in the following way: pulley groups 213 are provided on both sides of the bottom of the solid-state hydrogen storage package and pipeline 211, and guide rails 223 are provided on the corresponding two sides of the mounting base plate 222. The pulley group 213 is slidably connected to the guide rails, so that the solid-state hydrogen storage module 21 can slide on the mounting base plate 222, thereby achieving quick replacement of the solid-state hydrogen storage module 21.

[0025] Furthermore, a baffle 224 is provided on one side of the mounting base plate 222 away from the sliding end of the solid-state hydrogen storage module 21, and the baffle 224 can limit the solid-state hydrogen storage module 21. It also includes a press-type limit block 212, which is arranged on both sides of the front part below the solid-state hydrogen storage module 21, and the mounting base plate 222 located on both sides of the front part below the solid-state hydrogen storage module 21 is provided with a limit hole 2221, and the limit hole 2221 corresponds to the press-type limit block 212. The press-type limit block 212 is similar to the structure of a push-type ballpoint pen, which is a prior art and will not be described in detail here.

[0026] By pressing the push-type limit block 212, the push-type limit block 212 can be extended into the limit hole 2221 to limit the fixed hydrogen storage module 21, restrict the movement range of the solid-state hydrogen storage module 21, and prevent it from falling out during the driving of the forklift. When the solid-state hydrogen storage module 21 needs to be replaced, the push-type limit block 212 can be separated from the limit hole 2221 by pressing the push-type limit block 212 again.

[0027] The energy storage battery 3 is at the bottom. This is because the first energy storage battery 3 is relatively heavy. Placing it at the bottom moves the overall center of gravity downward, which is beneficial to driving safety. The second energy storage battery technology is mature and generally does not require maintenance. The easy-to-maintain position can be given to the fuel cell system. The third energy storage battery 3 replaces the counterweight block and the space can be reused.

[0028] The working principle of this embodiment includes: When the fuel cell system is just started, the energy storage battery 3 provides electric energy to the fuel cell system 1. The electric energy generated by the fuel cell system 1 is then transmitted to the energy storage battery 3. The energy storage battery 3 stores the electric energy to supply the external power system.

[0029] The solid-state hydrogen storage system 2 provides hydrogen for the fuel cell system 1 , and the solid-state hydrogen storage module 21 is rechargeable and replaceable, that is, it can be quickly recharged through a quick-plug connector, and can also be directly quickly replaced. Example 2

[0030] This embodiment is based on the first embodiment. The fuel cell system of this embodiment specifically includes a fuel cell stack, an air subsystem, a water thermal management subsystem, a hydrogen subsystem and a FCCU controller.

[0031] The battery stack is used to generate electric energy, and its electric energy output terminal is connected to the electric energy input terminal of the energy storage battery through the DCDC converter 13. In this embodiment, the DCDC converter 13 is cooled by air cooling, and no coolant is required to cool the inside of the DCDC converter 13.

[0032] The air subsystem includes an air filter 11 and a blower 12 connected in sequence through pipelines. The air filter 11 filters the external air and measures the air flow through a flow meter. The air is then pressurized by the blower 12. The pressurized air passes through a humidifier to obtain air with a certain humidity. Then, it passes through the air three-way valve. The first route enters the interior of the fuel cell stack and back-pressures the air through the air outlet throttle. The air inside the fuel cell stack has a certain pressure, and the power generation efficiency is higher. The humid air after back pressure enters the humidifier to humidify the dry air, and finally to the tail water tank. The second route is directly connected to the tail water tank. When the fuel cell is shut down, the air three-way valve switches to the second route to purge the liquid water in the air subsystem pipeline. At this time, the humidifier will be skipped and the dry air will not be humidified. The air subsystem will also dry quickly, which is conducive to cold start under low temperature conditions.

[0033] In this embodiment, the air filter 11 is arranged at the edge of the main frame 4, which is convenient for replacement during later maintenance. In addition, the space around the air filter 11 is large, which can ensure that sufficient air flows through the air filter. The blower 12 is used to replace the traditional air compressor and its controller. On the one hand, it is a cost consideration. The price of the blower 12 is only 1 / 4 of the price of the air compressor and its controller. On the other hand, it is for system integration considerations. The air compressor and its controller need coolant for cooling, so the integration of the fuel cell system 1 will increase several pipelines.

[0034] The selection of the blower 12 and the DCDC converter 13 makes the entire fuel cell system 1 not need auxiliary cooling pipes to cool it down, reducing the use of pipes and components, thereby increasing the integration of the fuel cell system 1 and reducing the cost of the fuel cell system.

[0035] The water thermal management subsystem provides the appropriate temperature for the fuel cell system. It consists of a water pump, a cooling fan, a thermostat, etc., and each component is connected by pipes. The water pump provides kinetic energy for the coolant, allowing the coolant to flow into the stack and adjust the internal temperature of the stack. When the temperature inside the stack is too low, the thermostat switches to a small cycle, the coolant enters the PTC, the coolant is heated by the PTC, and the heated coolant returns to the water pump inlet; when the temperature of the stack is too high, the thermostat switches to a large cycle, the coolant enters the cooling fan, the coolant temperature is lowered by the cooling fan, and the coolant at the appropriate temperature returns to the water pump inlet. There is also an expansion water tank before returning to the water pump. The purpose of the expansion water tank is to adjust the volume change of the coolant due to thermal expansion and contraction.

[0036] The hydrogen subsystem includes a gas-water separator and a hydrogen circulation pump. The hydrogen of the fuel cell system is provided by the solid hydrogen storage module. After the hydrogen enters the stack, some of the unreacted hydrogen is mixed with liquid water, so the hydrogen needs to be recycled. The gas-water separator separates the unreacted hydrogen and liquid water, and the separated hydrogen is transported to the hydrogen inlet through the hydrogen circulation pump, and continues to enter the stack for reaction together with the hydrogen in the solid hydrogen storage.

[0037] The FCCU controller is used to control the electrical and electronic control components in the fuel cell system. The FCCU controller is equipped with a low-voltage line interface, which is connected to an external controller. The electrical and electronic control components in the fuel cell system are connected to the ground bus, which is used to reduce the potential difference of the fuel cell system.

[0038] The air subsystem and the hydrogen subsystem are both connected to a mixed gas outlet D, which is used to mix the air and hydrogen in the air subsystem and the hydrogen subsystem and then discharge them. The hydrogen subsystem and the air subsystem are both connected to an electronic drain valve 14, which is used to discharge liquid water in the hydrogen subsystem and the air subsystem. The water thermal management subsystem is also provided with a water replenishment port B, which is used to replenish coolant for the water thermal management subsystem.

[0039] The energy storage battery 3 is provided with a high-voltage line interface E and a battery charging port A, and the high-voltage line interface E is connected to the external power system. The battery charging port A can conveniently charge the energy storage battery 3. The electrical and electronic control components in the fuel cell system 1 are connected to the ground bus F, which is used to reduce the potential difference of the fuel cell system 1 to ensure its operational stability.

[0040] In this embodiment, the mixed gas outlet D, the electronic drain valve 14, the water replenishment port B, the low-voltage line interface C, the ground bus F, the high-voltage line interface E, and the battery charging port A are all arranged on the outer side of the main frame 4. Example 3

[0041] This embodiment provides a hydrogen fuel cell forklift, including the quick-change solid-state hydrogen storage fuel cell power system of embodiment 1 or 2, the low-voltage line interface C in the quick-change solid-state hydrogen storage fuel cell power system is connected to the forklift controller, the high-voltage line interface E is connected to the forklift drive motor, and the ground bus F is connected to the forklift body.

[0042] 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 quick-change solid-state hydrogen storage fuel cell power system, characterized in that: The main frame includes a plurality of levels, and the levels are sequentially provided with a fuel cell system, a solid-state hydrogen storage system and an energy storage battery from top to bottom; the solid-state hydrogen storage system is used to supply hydrogen to the fuel cell system, and the energy storage battery is used to supply electric energy when the fuel cell system is started, and store the output electric energy of the fuel cell system; An installation base plate is arranged on the level where the solid-state hydrogen storage system is located. The solid-state hydrogen storage system includes a solid-state hydrogen storage auxiliary component and a solid-state hydrogen storage module slidably arranged on the installation base plate. The solid-state hydrogen storage module is used to store hydrogen, and the solid-state hydrogen storage auxiliary component is used to provide coolant for the solid-state hydrogen storage module and regulate the hydrogen pressure.

2. The quick-change solid-state hydrogen storage fuel cell power system according to claim 1 is characterized in that: The solid-state hydrogen storage module comprises a solid-state hydrogen storage package and a pipeline. A pulley block is provided at the bottom of the solid-state hydrogen storage package and the pipeline. A guide rail is provided on the mounting base plate. The pulley block is slidably connected to the guide rail.

3. The fast-change solid-state hydrogen storage fuel cell power system according to claim 2 is characterized in that: The solid-state hydrogen storage package and pipeline are provided with a first quick-plug coolant inlet, a first quick-plug coolant outlet, a first quick-plug hydrogen inlet and a first quick-plug hydrogen outlet; The solid-state hydrogen storage auxiliary component includes a solid-state hydrogen storage BOP assembly, which is provided with a coolant outlet, a coolant inlet, a hydrogen discharge port, and a hydrogen filling port. The solid-state hydrogen storage BOP assembly is also provided with a second quick-plug coolant outlet, a second quick-plug coolant inlet, a second quick-plug hydrogen outlet, and a second quick-plug hydrogen inlet; The first quick-plug coolant inlet and the second quick-plug coolant outlet, the first quick-plug coolant outlet and the second quick-plug coolant inlet, the first quick-plug hydrogen inlet and the second quick-plug hydrogen outlet, and the first quick-plug hydrogen outlet and the second quick-plug hydrogen inlet are connected in a one-to-one correspondence.

4. The fast-change solid-state hydrogen storage fuel cell power system according to claim 2 is characterized in that: A baffle is provided on one side of the mounting base plate away from the sliding-out end of the solid-state hydrogen storage module.

5. The fast-change solid-state hydrogen storage fuel cell power system according to claim 2 is characterized in that: It also includes a push-type limit block, which is arranged on both sides of the lower front part of the solid-state hydrogen storage module, and limit holes are arranged on the mounting base plate located on both sides of the lower front part of the solid-state hydrogen storage module, and the limit holes correspond to the push-type limit blocks. The push-type limit blocks can be extended into the limit holes by pressing to limit the fixed hydrogen storage module.

6. The fast-change solid-state hydrogen storage fuel cell power system according to claim 1 is characterized in that: The solid-state hydrogen storage system is connected to the fuel cell system through a hydrogen pipeline, the power output end of the energy storage battery is connected to the power input end of the fuel cell system, and the power output end of the fuel cell system is connected to the power input end of the energy storage battery; The fuel cell system includes a fuel cell stack, an air subsystem, a water thermal management subsystem, a hydrogen subsystem and a FCCU controller; The battery stack is used to generate electric energy, and its electric energy output end is connected to the electric energy input end of the energy storage battery through a DCDC converter, and the DCDC converter is air-cooled; The air subsystem includes a blower and an air filter. The blower delivers air to the fuel cell system through a pipeline, and the air outlet of the air filter is connected to the air inlet of the blower. The water thermal management subsystem is used to dissipate heat for the battery stack or to heat it during a low-temperature cold start; The hydrogen subsystem is used to transport hydrogen from the solid-state hydrogen storage module to the fuel cell stack, and is connected to the solid-state hydrogen storage module; The FCCU controller is used to control the electrical and electronic control components in the fuel cell system.

7. The fast-change solid-state hydrogen storage fuel cell power system according to claim 6, characterized in that: The air subsystem and the hydrogen subsystem are both connected to a mixed gas outlet, and the mixed gas outlet is used to mix the air and hydrogen in the air subsystem and the hydrogen subsystem and then discharge them; The hydrogen subsystem and the air subsystem are both connected to an electronic drain valve, which is used to discharge liquid water in the hydrogen subsystem and the air subsystem and is provided with a drain port; The water thermal management subsystem is provided with a water replenishment port, and the water replenishment port is used to replenish coolant for the water thermal management subsystem; The FCCU controller is provided with a low-voltage line interface, and the low-voltage line interface is connected to an external controller; The electrical and electronic control components in the fuel cell system are connected to a ground bus, and the ground bus is used to reduce the potential difference of the fuel cell system.

8. The fast-change solid-state hydrogen storage fuel cell power system according to claim 1 is characterized in that: The energy storage battery is provided with a high-voltage line interface and a battery charging port, and the high-voltage line interface is connected to an external power system.

9. The fast-change solid-state hydrogen storage fuel cell power system according to claim 7 or 8, characterized in that: The mixed gas outlet, drain outlet, water supply outlet, low-voltage line interface, ground bus, high-voltage line interface, and battery charging port are all arranged on the outer side of the main frame.

10. A hydrogen fuel cell forklift, characterized in that: It comprises a quick-change solid-state hydrogen storage fuel cell power system as described in any one of claims 1 to 9; the low-voltage line interface in the quick-change solid-state hydrogen storage fuel cell power system is connected to a forklift controller, the high-voltage line interface is connected to a forklift drive motor, and the ground bus is connected to a forklift body.

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