Device and method for detecting cycle life of solid hydrogen storage bottle

Abstract

The invention belongs to the technical field of solid-state hydrogen storage bottle detection, and particularly relates to a solid-state hydrogen storage bottle cycle life detection device and method, the device comprises a solid-state hydrogen storage bottle group and a solid-state hydrogen storage bottle to be detected, and also comprises a cold and hot water machine; the solid hydrogen storage bottle group and the solid hydrogen storage bottle to be detected are wrapped with water bath boxes, and temperature sensors are arranged in the water bath boxes; a cold water pipe and a hot water pipe are connected between the cold and hot water machine and the water bath box; a waterway circulating pump, a waterway switch valve and a waterway four-way connector are arranged on pipelines of the cold water pipe and the hot water pipe; the solid hydrogen storage bottle group comprises a hydrogen supply solid hydrogen storage bottle group and a hydrogen recovery solid hydrogen storage bottle group, and gas path pipelines are communicated among the hydrogen supply solid hydrogen storage bottle group, the solid hydrogen storage bottle to be detected and the hydrogen recovery solid hydrogen storage bottle group. In the testing process, hydrogen can be recycled, and the hydrogen cost is greatly reduced; in the testing process, heat absorbed and released by the hydrogen storage bottle is recycled, and energy consumption of the cold and hot water machine is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid hydrogen storage bottle detection, and particularly relates to a solid hydrogen storage bottle cycle life detection device and a method thereof. BACKGROUND

[0002] The solid hydrogen storage bottle is gradually applied in the fields of fuel cell driven two-wheel vehicles, urban environmental protection vehicles and express delivery vehicles due to its high safety and large volume hydrogen storage capacity. The cycle life is an important indicator for evaluating the performance of the solid hydrogen storage bottle. At present, there is no special detection instrument and detection standard in the country.

[0003] The prior art fills the hydrogen in the solid hydrogen storage bottle to be detected through the high-pressure gas cylinder, directly discharges the hydrogen from the solid hydrogen storage bottle to be detected after the hydrogen filling (emptying), and completes one hydrogen filling and discharging cycle detection. However, in actual detection, the hydrogen filling and discharging of the solid hydrogen storage bottle to be detected needs to be completed for thousands of cycles, which consumes a large amount of hydrogen and has a huge detection cost. SUMMARY

[0004] Based on the technical problems in the background art, the present application provides a solid hydrogen storage bottle cycle life detection device and a method thereof.

[0005] The solid hydrogen storage bottle cycle life detection device provided by the present application comprises a solid hydrogen storage bottle group and a solid hydrogen storage bottle to be detected, and further comprises a cold and hot water machine. The solid hydrogen storage bottle group and the solid hydrogen storage bottle to be detected are both wrapped with a water bath box, and a temperature sensor is arranged in the water bath box. A cold water pipe and a hot water pipe are connected between the cold and hot water machine and the water bath box, and a water circulation pump, a water switch valve and a water four-way joint are arranged on the pipe of the cold water pipe and the hot water pipe. The solid hydrogen storage bottle group comprises a hydrogen supply solid hydrogen storage bottle group and a hydrogen recovery solid hydrogen storage bottle group, and a gas pipeline is connected between the hydrogen supply solid hydrogen storage bottle group, the solid hydrogen storage bottle to be detected and the hydrogen recovery solid hydrogen storage bottle group. A gas ball valve, a flow meter, a pressure sensor, a gas three-way joint and a pressure reducing valve are arranged on the gas pipeline.

[0006] Further, the hydrogen supply solid hydrogen storage bottle group is filled with A type hydrogen storage alloy, and can provide a pressure of 3-5 MPa in a 60 DEG C water bath. The hydrogen recovery solid hydrogen storage bottle group is filled with B type hydrogen storage alloy, and the hydrogen pressure in a 0-10 DEG C water bath is less than 0.1 MPa.

[0007] Further, the cold and hot water machine and the water bath box realize hot water circulation or cold water circulation through the water circulation pump.

[0008] Further, the hot water in the cold and hot water machine is supplied to the external water bath box for heating, and is drawn back to the cold and hot water machine for cold water supply after being cooled by the hot water in the heat exchange water bath box. The cold water in the cold and hot water machine is supplied to the water bath box for cooling, and is drawn back to the cold and hot water machine for hot water supply after being heated by the cold water in the heat exchange water bath box.

[0009] Furthermore, flow meters and pressure sensors are installed on the gas pipelines between the hydrogen supply solid hydrogen storage cylinder group and the solid hydrogen storage cylinder to be tested, as well as between the solid hydrogen storage cylinder to be tested and the hydrogen recovery solid hydrogen storage cylinder group.

[0010] The present invention proposes a method for detecting the cycle life of a solid hydrogen storage cylinder, comprising the following steps: Step 1: Preparation before testing: Fill the hydrogen supply solid hydrogen storage cylinder group with hydrogen, drain the hydrogen from the solid hydrogen storage cylinder to be tested, and drain the hydrogen from the hydrogen recovery solid hydrogen storage cylinder group. Step 2, Hydrogen Charging Process: Turn on the hot and cold water dispenser and water circuit switch valve to provide hot water to the external water bath of the hydrogen supply solid-state hydrogen storage cylinder group, forming a closed loop of hot water supply. When the external water bath of the hydrogen supply solid-state hydrogen storage cylinder group reaches the set temperature, turn off the water circulation pump, and the hydrogen supply solid-state hydrogen storage cylinder group is in a standby state for hydrogen supply. Provide cold water circulation to the external water bath of the solid-state hydrogen storage cylinder under test through the four-way valve, circulation pump, and water circuit switch valve. Close the gas circuit valve, set the hydrogen charging pressure with the pressure reducing valve, open the hydrogen charging valve, and the solid-state hydrogen storage cylinder under test begins to be charged with hydrogen. Record the hydrogen charging amount through the flow meter, and simultaneously record the pressure and water bath temperature data until the solid-state hydrogen storage cylinder under test is full. Step 3, Hydrogen Release Process: The hot and cold water unit forms a closed-loop cold water supply with the external water tank of the hydrogen recovery and storage cylinder group through a four-way valve, circulation pump, and water switch valve. When the external water bath of the hydrogen recovery and storage cylinder group reaches the set temperature, the water circulation pump is turned off, and the hydrogen recovery and storage cylinder group is in the state of waiting to recover hydrogen. Hot water circulation is provided to the external water bath of the solid hydrogen storage cylinder under test through the four-way valve, circulation pump, and water switch valve. The gas valve is closed, the hydrogen release valve is opened, and the solid hydrogen storage cylinder under test begins to release hydrogen. The amount of hydrogen released is recorded by the flow meter, and the water bath temperature data is recorded at the same time until the hydrogen release is completed. Steps four, two, and three constitute a hydrogen charging and discharging cycle of the solid hydrogen storage bottle under test. This process is repeated, and the decay of the hydrogen storage bottle is determined by comparing the amount of hydrogen discharged from the bottle in each cycle with its initial capacity, thereby determining the service life of the solid hydrogen storage bottle under test. Step 5: When the cumulative hydrogen release detected by the flow meter approaches the capacity of the hydrogen recovery and storage cylinder group, the hydrogen from the hydrogen recovery and storage cylinder group is backfilled back into the hydrogen supply solid-state storage cylinder group.

[0011] Furthermore, in step two, the set temperature of the external water bath of the hydrogen supply solid hydrogen storage cylinder group is 60℃; the temperature of the external water bath of the solid hydrogen storage cylinder to be tested is 5-10℃; and the hydrogen charging pressure of the pressure reducing valve is set to 3-5MPa.

[0012] Furthermore, in step three, the external water bath of the hydrogen recovery storage cylinder group is set to a temperature of 5-10℃; the external water bath of the solid hydrogen storage cylinder to be tested is set to a temperature of 60℃.

[0013] Furthermore, in step five, the hot water in the external water bath of the hydrogen recovery storage cylinder group is circulated to 60-80℃, the cold water in the external water bath of the hydrogen supply solid storage cylinder group is circulated to 5-10℃, and the gas circuit valve is opened to realize hydrogen reverse charging and recycling.

[0014] The beneficial effects of this invention are as follows: During the testing process, hydrogen can be recycled, significantly reducing the cost of hydrogen.

[0015] During the test, the hydrogen storage cylinder group absorbed and released heat in a cycle, which greatly reduced the energy consumption of the hot and cold water heater.

[0016] The detection device does not use high-pressure gas cylinders, which improves safety.

[0017] The detection process is automated, improving detection efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a solid hydrogen storage cylinder cycle life testing device proposed in this invention.

[0019] In the diagram: 1-Solid hydrogen storage cylinder group, 2-Hydrogen storage cylinder to be tested, 3-Water bath, 4-Hot water heater, 5-Temperature sensor, 6-Water circuit switch valve, 7-Water circuit circulation pump, 8-Pressure sensor, 9-Flow meter, 10-Gas circuit ball valve, 11-Gas circuit tee connector, 12-Water circuit four-way connector, 13-Pressure reducing valve. Detailed Implementation

[0020] Example 1: Refer to Figure 1 A solid hydrogen storage cylinder cycle life testing device includes a solid hydrogen storage cylinder group 1 and a solid hydrogen storage cylinder 2 to be tested, and also includes a hot and cold water machine 4. Both the solid hydrogen storage cylinder group 1 and the solid hydrogen storage cylinder 2 under test are wrapped with a water bath 3, and a temperature sensor is installed in the water bath 3. A cold water pipe and a hot water pipe are connected between the cold water heater 4 and the water bath 3. A water circulation pump 7, a water switch valve 6, and a water four-way connector 12 are installed on the cold water pipe and the hot water pipe. Solid hydrogen storage cylinder group 1 includes hydrogen supply solid hydrogen storage cylinder group 1-1 and hydrogen recovery solid hydrogen storage cylinder group 1-2. Gas pipelines are connected to hydrogen supply solid hydrogen storage cylinder group 1-1, solid hydrogen storage cylinder 2 to be tested and hydrogen recovery solid hydrogen storage cylinder group 1-2. The gas pipeline is equipped with a gas ball valve 10, a flow meter 9, a pressure sensor 8, a gas tee connector 11, and a pressure reducing valve 13.

[0021] In this invention, the hydrogen supply solid hydrogen storage cylinder group 1-1 is filled with type A hydrogen storage alloy, which can provide a pressure of 3-5 MPa in a 60°C water bath; the hydrogen recovery solid hydrogen storage cylinder group 1-2 is filled with type B hydrogen storage alloy, and the hydrogen pressure in a 0-10°C water bath is less than 0.1 MPa.

[0022] In this invention, hot water circulation is achieved between the hot and cold water heater 4 and the water bath tank 3 via a water circulation pump 7; hot water in the hot and cold water heater 4 is supplied to the external water bath tank for heating, and after being cooled by the hot water in the water exchange bath tank, it is pumped back to the hot and cold water heater 4 for cold water supply; cold water in the hot and cold water heater 4 is supplied to the water bath tank for cooling, and after being heated by the cold water in the water exchange bath tank, it is pumped back to the hot and cold water heater 4 for hot water supply.

[0023] In this invention, the flow meter 9 and the pressure sensor 8 are installed on the gas pipeline between the hydrogen supply solid hydrogen storage cylinder group 1-1 and the solid hydrogen storage cylinder 2 to be tested, and between the solid hydrogen storage cylinder 2 to be tested and the hydrogen recovery solid hydrogen storage cylinder group 1-2.

[0024] A method for testing the cycle life of a solid hydrogen storage cylinder includes the following steps: Step 1: Preparation before testing: Fill the hydrogen supply solid hydrogen storage cylinder group 1-1 with hydrogen, discharge the hydrogen from the solid hydrogen storage cylinder 2-1 to be tested, and discharge the hydrogen from the hydrogen recovery solid hydrogen storage cylinder group 1-2. Step 2, Hydrogen Charging Process: With water circuit valves 6-3, 6-4, 6-5, and 6-6 closed, the hot and cold water pump 4 and water circuit valves 6-1 and 6-2 are turned on to provide hot water to the external water bath 3-1 of the hydrogen supply solid-state storage cylinder group 1-1, forming a closed-loop hot water supply. When the external water bath 3-1 of the hydrogen supply solid-state storage cylinder group 1-1 reaches the set temperature, the water circulation pump 7 is turned off, and the hydrogen supply solid-state storage cylinder group 1-1 is in a standby hydrogen supply state. Cold water circulation is provided to the external water bath 3-2 of the solid-state storage cylinder 2 under test through four-way valves 12-1 and 12-2, circulation pumps 7-3 and 7-4, and water circuit valves 6-3 and 6-4. The gas circuit valve 10-3 is closed, the pressure reducing valve is set to the hydrogen charging pressure, and the hydrogen charging valve 10-2 is opened. The solid-state storage cylinder 2-1 under test begins to be charged with hydrogen. The amount of hydrogen charged is recorded by the flow meter 9-1, and the pressure and water bath temperature data are recorded simultaneously until the solid-state storage cylinder under test is full. Step 3, Hydrogen Release Process: Water circuit valves 6-1, 6-2, 6-3, and 6-4 are closed. The hot and cold water unit 4-1, through four-way valves 12-1 and 12-2, circulation pumps 7-5 and 7-6, and water circuit valves 6-5 and 6-6, forms a closed-loop cold water supply with the external water tank 3-3 of the hydrogen recovery and storage cylinder group 1-2. When the external water bath 3-3 of the hydrogen recovery and storage cylinder group 1-2 reaches the set temperature, water circulation pumps 7-5 and 7-6 are shut off. Hydrogen recovery storage cylinder group 1-2 is in the state of waiting to recover hydrogen; hot water circulation is provided to the external water bath 3-2 of the solid hydrogen storage cylinder 2 under test through four-way valves 12-1 and 12-2, circulation pumps 7-3 and 7-4, and water circuit switch valves 6-3 and 6-4; gas circuit valve 10-2 is closed and hydrogen release valve 10-3 is opened, and the solid hydrogen storage cylinder under test begins to release hydrogen. The amount of hydrogen released is recorded by flow meter 9-2, and the water bath temperature data is recorded at the same time until the hydrogen release is completed; Steps four, two, and three constitute a hydrogen charging and discharging cycle of the solid hydrogen storage bottle 2 under test. This cycle is repeated. By comparing the amount of hydrogen discharged from the hydrogen storage bottle under test in each cycle with its initial capacity, the decay change of the hydrogen storage bottle can be determined, thereby determining the service life of the solid hydrogen storage bottle 2 under test. Step 5: When the cumulative hydrogen release detected by flow meter 9-2 approaches the capacity of hydrogen recovery and storage cylinder group 1-2, the hydrogen in hydrogen recovery and storage cylinder group 1-2 is backfilled back into the hydrogen supply solid-state storage cylinder group 1-1.

[0025] In this invention, in step two, the set temperature of the external water bath 3-1 of the hydrogen supply solid hydrogen storage cylinder group 1-1 is preferably 60°C. The preferred temperature for the external water bath 3-2 of the solid hydrogen storage bottle 2 to be tested is 5-10℃. The hydrogen charging pressure of the pressure reducing valve is preferably set to 3-5 MPa.

[0026] In this invention, in step three, the preferred temperature setting for the external water bath 3-3 of the hydrogen recovery storage cylinder group 1-2 is 5-10℃; The preferred temperature for the external water bath 3-2 of the solid hydrogen storage bottle 2 to be tested is 60℃.

[0027] In this invention, in step five, the hot water in the external water bath 3-3 of the hydrogen recovery storage cylinder group 1-2 is circulated to 60-80°C, and the cold water in the external water bath 3-1 of the hydrogen supply solid storage cylinder group 1-1 is circulated to 5-10°C. The gas circuit valves 10-1 and 10-4 are opened to realize hydrogen reverse charging and recycling.

[0028] Working principle: 1) Preparation before testing: Hydrogen supply solid hydrogen storage cylinder group 1-1 is filled with hydrogen, hydrogen to be tested solid hydrogen storage cylinder 2-1 is discharged, and hydrogen recovery solid hydrogen storage cylinder group 1-2 is discharged. 2) Hydrogen charging process: Water circuit valves 6-3, 6-4, 6-5, and 6-6 are closed. Water circuit valves 6-1 and 6-2 of the hot and cold water heater 4 are opened. The hot water tank of the hot and cold water heater supplies hot water to the external water bath 3-1 of the hydrogen supply solid-state storage cylinder group 1-1 through the four-way valve 12-2 and the hot water circulation pump 7-2. Simultaneously, the water in the external water bath 3-1 is pumped back to the cold water tank of the hot and cold water heater through the cold water circulation pump 7-1, forming a closed-loop hot water supply. When the external water bath 3-1 of the hydrogen supply solid-state storage cylinder group 1-1 reaches the set temperature, for example, 60℃, the water circulation pump 7-1 is turned off. -1, 7-2, the hydrogen supply solid hydrogen storage cylinder group 1-1 is in the standby hydrogen supply state; cold water circulation (preferably 5-10℃) is provided to the external water bath of the solid hydrogen storage cylinder under test through four-way valves 12-1, 12-2, circulation pumps 7-3, 7-4, and water circuit switch valves 6-3, 6-4; close the gas circuit valve 10-3, set the hydrogen charging pressure (preferably 3-5MPa) with the pressure reducing valve, open the hydrogen charging valve 10-2, the solid hydrogen storage cylinder under test begins to be charged with hydrogen, and the charging amount, pressure, water bath temperature and other data are recorded. When the mass flow meter no longer detects the flow, the hydrogen charging ends. 3) Hydrogen release process: Water circuit valves 6-1, 6-2, 6-3, and 6-4 are closed. The hot and cold water unit 4-1, through four-way valves 12-1 and 12-2, circulation pumps 7-5 and 7-6, and water circuit valves 6-5 and 6-6, forms a closed-loop cold water supply with the external water tank of the hydrogen recovery storage cylinder group. When the external water bath of the solid hydrogen storage cylinder group 1-2 reaches the set temperature, such as 5-10℃, the water circulation pumps 7-5 and 7-6 are shut off, and the solid hydrogen storage cylinder... Group 1-2 is in the state of waiting to recover hydrogen; hot water circulation (preferably 60℃) is provided to the external water bath of the solid hydrogen storage bottle under test through four-way valves 12-1 and 12-2, circulation pumps 7-3 and 7-4, and water circuit switch valves 6-3 and 6-4; gas circuit valve 10-2 is closed, hydrogen release valve 10-3 is opened, and the solid hydrogen storage bottle under test begins to release hydrogen. The amount of hydrogen released and the water bath temperature are recorded by mass flow meter. When the mass flow meter no longer detects the flow, the hydrogen release ends. 4) Repeat steps 2) and 3) to complete one hydrogen charging and discharging cycle of the solid hydrogen storage cylinder under test: When the cumulative hydrogen release detected by mass flow meter 9-2 approaches the capacity of the hydrogen recovery solid storage cylinder group, the recovered hydrogen needs to be backfilled back into the hydrogen supply solid storage cylinder group 1-1. The specific steps are as follows: heat the external water bath of the hydrogen recovery solid storage cylinder group to 60-80℃, and form a cold water supply closed loop with the external water bath of the hydrogen supply solid storage cylinder group. Open the gas circuit valves 10-1 and 10-4 to realize hydrogen backfilling and recycling.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the cycle life of solid hydrogen storage cylinders, comprising a group of solid hydrogen storage cylinders and a solid hydrogen storage cylinder to be tested, characterized in that, It also includes hot and cold water heaters; Both the solid hydrogen storage cylinder group and the solid hydrogen storage cylinder under test are encased in a water bath, and a temperature sensor is installed in the water bath. The cold and hot water heater is connected to the water bath by cold water pipes and hot water pipes. The cold water pipes and hot water pipes are equipped with a water circulation pump, a water switch valve, and a four-way water connector. The solid hydrogen storage cylinder group includes a hydrogen supply solid hydrogen storage cylinder group and a hydrogen recovery solid hydrogen storage cylinder group. The hydrogen supply solid hydrogen storage cylinder group, the solid hydrogen storage cylinder under test and the hydrogen recovery solid hydrogen storage cylinder group are all connected by gas pipelines. The gas pipeline is equipped with a gas ball valve, flow meter, pressure sensor, gas tee connector and pressure reducing valve.

2. The solid hydrogen storage cylinder cycle life testing device according to claim 1, characterized in that, The hydrogen supply solid-state hydrogen storage cylinder is filled with type A hydrogen storage alloy and can provide a pressure of 3-5 MPa in a 60℃ water bath; the hydrogen recovery solid-state hydrogen storage cylinder is filled with type B hydrogen storage alloy and the hydrogen pressure is less than 0.1 MPa in a 0-10℃ water bath.

3. The solid hydrogen storage cylinder cycle life testing device according to claim 1, characterized in that, Hot or cold water circulation is achieved between the hot and cold water heater and the water bath tank via a water circulation pump.

4. The solid hydrogen storage cylinder cycle life testing device according to claim 3, characterized in that, Hot water from the hot and cold water heater is supplied to an external water bath for heating. After being cooled in the water exchange bath, the hot water is drawn back into the hot and cold water heater for cold water supply. Cold water from the hot and cold water heater is supplied to a water bath for cooling. After being heated in the water exchange bath, the cold water is drawn back into the hot and cold water heater for hot water supply.

5. The solid hydrogen storage cylinder cycle life testing device according to claim 1, characterized in that, Flow meters and pressure sensors are installed on the gas pipelines between the hydrogen supply solid hydrogen storage cylinder group and the solid hydrogen storage cylinder to be tested, as well as between the solid hydrogen storage cylinder to be tested and the hydrogen recovery solid hydrogen storage cylinder group.

6. A method for testing the cycle life of a solid hydrogen storage cylinder, comprising a device for testing the cycle life of a solid hydrogen storage cylinder according to any one of claims 1 to 5, characterized in that, Includes the following steps: Step 1: Preparation before testing: Fill the hydrogen supply solid hydrogen storage cylinder group with hydrogen, drain the hydrogen from the solid hydrogen storage cylinder to be tested, and drain the hydrogen from the hydrogen recovery solid hydrogen storage cylinder group. Step 2, Hydrogen charging process: Turn on the hot and cold water heater and water circuit switch valve to provide hot water to the external water bath of the hydrogen supply solid hydrogen storage cylinder group to form a hot water supply closed loop. When the external water bath of the hydrogen supply solid hydrogen storage cylinder group reaches the set temperature, turn off the water circulation pump and the hydrogen supply solid hydrogen storage cylinder group is in the hydrogen supply standby state. The external water bath of the solid hydrogen storage cylinder under test is supplied with cold water through a four-way valve, a circulation pump, and a water circuit switch valve; Close the gas circuit valve, set the hydrogen charging pressure on the pressure reducing valve, open the hydrogen charging valve, and start charging the solid hydrogen storage cylinder under test. Record the amount of hydrogen charged through the flow meter, and simultaneously record the pressure and water bath temperature data until the solid hydrogen storage cylinder under test is full. Step 3, Hydrogen release process: The hot and cold water heater forms a closed loop of cold water supply with the external water tank of the hydrogen recovery and storage cylinder group through the four-way valve, circulation pump, and water switch valve. When the external water bath of the hydrogen recovery and storage cylinder group reaches the set temperature, the water circulation pump is turned off, and the hydrogen recovery and storage cylinder group is in the state of waiting to recover hydrogen. Hot water circulation is provided to the external water bath of the solid hydrogen storage cylinder under test through a four-way valve, a circulation pump, and a water circuit switch valve; Close the gas valve, open the hydrogen release valve, and start releasing hydrogen from the solid hydrogen storage cylinder under test. Record the amount of hydrogen released through the flow meter, and simultaneously record the water bath temperature data until the hydrogen release is complete. Steps four, two, and three constitute a hydrogen charging and discharging cycle of the solid hydrogen storage bottle under test. This process is repeated, and the decay of the hydrogen storage bottle is determined by comparing the amount of hydrogen discharged from the bottle in each cycle with its initial capacity, thereby determining the service life of the solid hydrogen storage bottle under test. Step 5: When the cumulative hydrogen release detected by the flow meter approaches the capacity of the hydrogen recovery and storage cylinder group, the hydrogen from the hydrogen recovery and storage cylinder group is backfilled back into the hydrogen supply solid-state storage cylinder group.

7. The method for detecting the cycle life of a solid hydrogen storage cylinder according to claim 6, characterized in that, In step two, the set temperature of the external water bath of the hydrogen supply solid-state hydrogen storage cylinder group is 60℃. The temperature of the external water bath in the solid hydrogen storage cylinder under test is 5-10℃.

8. The method for detecting the cycle life of a solid hydrogen storage cylinder according to claim 6, characterized in that, In step two, the pressure reducing valve is set to a hydrogen charging pressure of 3-5 MPa.

9. The method for detecting the cycle life of a solid hydrogen storage cylinder according to claim 6, characterized in that, In step three, the external water bath of the hydrogen recovery storage cylinder group is set to a temperature of 5-10℃; The temperature of the external water bath in the solid hydrogen storage cylinder under test is 60℃.

10. The method for detecting the cycle life of a solid hydrogen storage cylinder according to claim 6, characterized in that, In step five, the hot water in the external water bath of the hydrogen recovery storage cylinder group is circulated to 60-80℃, and the cold water in the external water bath of the hydrogen supply solid storage cylinder group is circulated to 5-10℃. The gas circuit valve is then opened to realize hydrogen reverse charging and recycling.

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