A liquid hydrogen storage vessel pressurization system

Abstract

The application relates to the technical field of liquid hydrogen application, and discloses a liquid hydrogen storage container pressurizing system, which comprises a hydrogen storage container, wherein the hydrogen storage container comprises an inner container, a safety valve, a pressure transmitter, a high-vacuum heat insulation layer, a pressurizing heat exchange pipe and a shell; the high-vacuum heat insulation layer is arranged outside the inner container; the pressurizing heat exchange pipe is arranged outside the high-vacuum heat insulation layer; and the shell is arranged outside the pressurizing heat exchange pipe; a hydrogen supply system is connected with a liquid hydrogen area of the liquid hydrogen container through an inlet end of the hydrogen supply system. The application can efficiently utilize the existing cold and heat energy in the original hydrogen supply system, realizes pump-free flow of the pressurizing system through the characteristics of solid hydrogen storage alloy, reduces the cost, avoids hydrogen leakage, and solves the problems that the liquid hydrogen storage and supply system cannot be pressurized or is pressurized slowly at low ambient temperature and in the low liquid level stage of the hydrogen storage container.

Description

Technical Field

[0001] This invention relates to the field of liquid hydrogen application technology, and in particular to a pressurization system for a liquid hydrogen storage container. Background Technology

[0002] Hydrogen energy, as a renewable, clean, and efficient secondary energy source, boasts numerous advantages, including abundant resources, wide availability, high calorific value, clean and pollution-free operation, diverse utilization methods, suitability as an energy storage medium, and good safety. It is a crucial choice for achieving energy transition and carbon neutrality. The development of the entire hydrogen energy industry chain includes production, storage, transportation, as well as safety assessment and early warning monitoring.

[0003] Depending on the form of hydrogen, there are currently several main hydrogen storage technologies, including solid-state hydrogen storage, cryogenic liquid hydrogen storage, high-pressure gaseous hydrogen storage, and organic liquid hydrogen storage, each with different characteristics and applicable ranges.

[0004] In cryogenic liquid hydrogen storage applications, liquid hydrogen is generally stored in highly insulated storage devices, where the internal liquid hydrogen temperature is as low as -250°C and the pressure is low. However, when applications are needed, the supply pressure is often insufficient.

[0005] In traditional hydrogen energy solutions, to ensure a suitable hydrogen supply, the hydrogen supply system uses an ambient temperature booster or a water bath vaporizer to change the liquid hydrogen passing through the pipeline into a gaseous state, which then flows back to the storage container, thereby increasing the system pressure and meeting the corresponding gas supply requirements.

[0006] However, traditional ambient air pressurizers are finned tube type, operating on the principle of heat exchange between air and liquid hydrogen inside the tube. The fins increase the heat exchange area, and this structure is efficient enough in the initial stages of heat exchange. However, as the hydrogen supply system is used for longer periods, the low temperature of the liquid hydrogen causes a sharp drop in the fin temperature upon contact with the fins. The surrounding air condenses upon contact with this condensation, leading to frost and ice formation on the fins, resulting in a decrease in heat exchange efficiency. For water bath vaporizers, if the liquid level in the storage container is low, the system lacks a sufficient pressure difference to allow the liquid hydrogen to flow out, significantly reducing the heat exchange and pressurization capacity. Using a pump for forced delivery would lead to hydrogen leakage and substantial initial investment costs. Therefore, solving the problem of insufficient or slow pressurization of liquid hydrogen systems at low ambient temperatures and low liquid levels in the storage container has become an urgent issue. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pressurization system for liquid hydrogen storage containers.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A liquid hydrogen storage container pressurization system includes a hydrogen storage container, the hydrogen storage container including an inner liner, a safety valve, a pressure transmitter, a high vacuum insulation layer, a pressurization heat exchange tube, and a shell. The high vacuum insulation layer is sleeved on the outside of the inner liner, the pressurization heat exchange tube is sleeved on the outside of the high vacuum insulation layer, and the shell is sleeved on the outside of the pressurization heat exchange tube.

[0010] A hydrogen supply system, wherein the inlet of the hydrogen supply system is connected to the liquid hydrogen zone of the liquid hydrogen container;

[0011] The system includes a pressurization system, a heat source pipeline connected to the heat exchanger of the hydrogen supply system, a cold source pipeline connected to the hydrogen supply system pipeline after the heat exchanger, and pipelines of the pressurization system connected to the inlet and outlet of the pressurization heat exchange pipe at the bottom of the liquid hydrogen container. It also includes a first solid-state hydrogen storage module, a second solid-state hydrogen storage module, an auxiliary pressurization circuit, and a control system. The control system includes valves, sensors, and a central control unit.

[0012] An auxiliary pressurization system is provided, with its inlet connected to the hydrogen supply system and its outlet branched into two paths, which are respectively connected to the hydrogen supply system and the return port of the liquid hydrogen container.

[0013] As a further embodiment of the present invention, the liquid hydrogen container includes a liquid hydrogen return port connected to the return gas pipeline of the auxiliary pressurization system for recovering high-pressure hydrogen generated by the auxiliary pressurization system and pressurizing the liquid hydrogen container. The auxiliary pressurization system includes an auxiliary pressurization pipeline, an auxiliary pressurization control valve, a compressor, and a return gas control valve. The auxiliary pressurization control valve includes a first auxiliary control valve A and a second auxiliary control valve B, used for rapid pressurization operation of the system under extreme environments (such as failure of external heat source or short-term demand for large pressurization effect). The inlet end of the first auxiliary control valve A is connected to the outlet end of the hydrogen supply pipeline, the inlet end of the compressor is connected to the outlet end of the first auxiliary control valve A, and the inlet end of the second auxiliary control valve B is connected to the outlet end of the compressor. The second auxiliary control valve B is connected to the return gas port of the hydrogen storage container. The compressor should be a metal hydride compressor. The control valve, fluid pump, and compressor have remote control and opening adjustment functions.

[0014] As a further embodiment of the present invention, the liquid hydrogen container includes a pressurization heat exchange tube at the bottom of the container, which is connected to the main pipeline of the pressurization system.

[0015] As a further embodiment of the present invention, the hydrogen supply system includes a heat exchanger, which includes a liquid hydrogen flow channel and a heating flow channel for vaporizing liquid hydrogen delivered to the heat exchanger by the hydrogen supply pipeline into hydrogen gas. The outlet end of the hydrogen supply system is connected to the inlet end of the heat exchanger, and the inlet end of the hydrogen supply system is connected to the outlet end of the heat exchanger. The heating outlet end of the heat exchanger is connected to the inlet end of the heating pipeline, and the heating inlet end of the heat exchanger is connected to the outlet end of the heating pipeline. The heat source inlet of the heat exchanger is connected to the provided heat source outlet, and the heat source outlet of the heat exchanger is connected to the provided heat source inlet. The provided heat source has adjustable capability and includes, but is not limited to, hot water from vehicle engine, industrial waste heat, and electric auxiliary heating.

[0016] As a further embodiment of the present invention, the hydrogen supply system further includes a cold source control valve, a one-way valve A, a one-way valve B, a buffer tank, a safety valve A, a pressure transmitter A, and a gas supply control valve, which are respectively installed on the main hydrogen supply pipeline.

[0017] As a further embodiment of the present invention, the pressurization system includes a first solid-state hydrogen storage module and a second solid-state hydrogen storage module, and a gas filling port. The heat source inlet of the first solid-state hydrogen storage module is connected to the outlet of the heating pipeline, and the heat source outlet of the first solid-state hydrogen storage module is connected to the inlet of the heating pipeline. The heat source inlet of the second solid-state hydrogen storage module is connected to the outlet of the heating pipeline, and the heat source outlet of the second solid-state hydrogen storage module is connected to the inlet of the heating pipeline. The outlet of the second solid-state hydrogen storage module is connected to the inlet of the pressurization pipeline. The solid-state hydrogen storage module has good elasticity and heat exchange channels to accommodate volume changes caused by temperature variations in the hydrogen storage alloy. The solid-state hydrogen storage module has good heat exchange channels to enable the hydrogen storage alloy to efficiently exchange heat with the heat source and cold source. The initial hydrogen absorption capacity of the solid-state hydrogen storage module should meet the safe pipeline pressure under constant temperature and pressure conditions to enable the hydrogen storage alloy to efficiently exchange heat with the heat source and cold source.

[0018] As a further embodiment of the present invention, the pressurization system further includes a cold source pipeline, wherein the cold source inlet of the first solid-state hydrogen storage module is connected to the outlet of the hydrogen supply pipeline, and the cold source outlet of the first solid-state hydrogen storage module is connected to the inlet of the hydrogen supply pipeline; the cold source inlet of the second solid-state hydrogen storage module is connected to the outlet of the hydrogen supply pipeline, and the cold source outlet of the second solid-state hydrogen storage module is connected to the inlet of the hydrogen supply pipeline.

[0019] As a further aspect of the present invention, the hydrogen storage alloy selected for the solid hydrogen storage module should have suitable hydrogen absorption and desorption characteristics, with each kg of alloy having a hydrogen desorption capacity of 2 NL / min at 80°C and 3 MPa, and a hydrogen absorption capacity at 20°C and lower temperatures, such as AB2 series alloys.

[0020] As a further embodiment of the present invention, the pressurization system further includes a first pressure transmitter, a gas filling port, a first temperature transmitter, a first pressure transmitter, a second pressure transmitter, a second temperature transmitter, a pressurization safety valve, a vent valve, a heating three-way regulating valve, a regenerative first check valve, a regenerative second check valve, a regenerative pipeline, a cooling pipeline, a cooling three-way regulating valve, a regenerative first check valve, a regenerative second check valve, and a regenerative pipeline. The first pressure transmitter and the first temperature transmitter are located at the outlet of the first solid-state hydrogen storage module, and the second pressure transmitter and the second temperature transmitter are located at the outlet of the second solid-state hydrogen storage module.

[0021] As a further embodiment of the present invention, the pressurization system further includes a safety valve A, which is installed on the pressurization pipeline for the safe release of hydrogen when the pressure in the pressurization pipeline exceeds the limit. The heating pipeline of the pressurization system operates in a temperature range of -30 to 120°C using a liquid working fluid with good specific heat capacity and fluidity, such as a 50% ethylene glycol solution. The heating pipeline of the pressurization system is equipped with a fluid pump, an expansion tank, an exhaust valve, and a vent valve. The inlet of the fluid pump is connected to the outlet of the heating pipeline. The pressurization system also includes a one-way valve and a three-way regulating valve. The one-way valve is installed at the heat source outlet and cold source outlet of the first hydrogen storage module and the second hydrogen storage module. The three-way regulating valve is installed at the heat source inlet and cold source inlet of the first hydrogen storage module and the second hydrogen storage module.

[0022] The beneficial effects of this invention are as follows:

[0023] By combining the characteristics of solid-state hydrogen storage with the pressurization requirements of liquid hydrogen, a portion of hydrogen is pre-stored in the hydrogen storage module. When pressurization is needed, heat is transferred to the first hydrogen storage module, causing it to release high-temperature, high-pressure hydrogen. The hydrogen flows through the heat exchange tube at the bottom of the storage container, releasing heat to the inner tank and heating the internal liquid hydrogen, thus achieving pressurization. The low-temperature hydrogen in the pressurization pipeline continues to flow into the second hydrogen storage module. Due to its low temperature, the second hydrogen storage module absorbs hydrogen, ensuring stable system pressure. When the first hydrogen storage module finishes releasing hydrogen, its heat source is cut off, and the heat source is switched to the second hydrogen storage module. Simultaneously, low-temperature hydrogen is drawn from the heat exchanger of the main hydrogen supply pipeline to cool the first hydrogen storage module, achieving the effect of hydrogen release from the second hydrogen storage module and hydrogen absorption from the first module. According to calculations, one hydrogen release cycle can meet one pressurization requirement. The auxiliary pressurization system is optional and is only activated under specific adverse conditions, such as when the external heat source fails or a large pressurization effect is required for a short period. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a liquid hydrogen storage container pressurization system proposed in this invention.

[0025] In the diagram: 10. Hydrogen storage container, 11. Inner liner, 12. Safety valve, 13. Pressure transmitter, 14. Gas return port, 15. High vacuum insulation layer, 16. Shell, 20. Hydrogen supply system, 21. Heat exchanger, 22. Cold source control valve, 23. Check valve A, 24. Check valve B, 25. Hydrogen supply pipeline, 26. Buffer tank, 27. Safety valve A, 28. Pressure transmitter A, 29. Gas supply control valve, 300. Pressurization system, 301. Pressurization pipeline, 302. Gas filling port, 303. First temperature transmitter, 304. First pressure transmitter, 305. First solid hydrogen storage module, 306. Second solid hydrogen storage module, 307. Second pressure transmitter, 308. Second temperature transmitter, 309. Pressure boosting safety valve, 310. Pressure boosting heat exchange tube, 311. Heating pipeline, 312. Vent valve, 313. Expansion tank, 314. Fluid pump, 315. Exhaust valve, 316. Heating three-way regulating valve, 317. Regenerative first check valve, 318. Regenerative second check valve, 319. Regenerative pipeline, 320. Cooling pipeline, 321. Cooling three-way regulating valve, 322. Cooling first check valve, 323. Cooling second check valve, 324. Cooling pipeline, 40. Auxiliary pressure boosting system, 41. Auxiliary pressure boosting pipeline, 42. Auxiliary pressure boosting control valve, 43. Compressor, 44. Return gas pipeline, 45. Return gas control valve, 50. Control system. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] See attached document Figure 1 A liquid hydrogen storage container pressurization system includes a hydrogen storage container 10, a hydrogen supply system 20, a pressurization system 300, an auxiliary pressurization system 40, and a control system 50. The hydrogen storage container 10 includes an inner liner 11, a safety valve 12, a pressure transmitter 13, a return port 14, a high vacuum insulation layer 15, and a shell 16. The high vacuum insulation layer 15 is fitted outside the inner liner 11, and the shell is fitted outside the high vacuum insulation layer 15. The safety valve 12, the pressure transmitter 13, and the return port 14 are located on one side of the hydrogen storage container and are in communication with the gas phase space inside the hydrogen storage container 10.

[0029] In this embodiment, a pressurized heat exchange tube is provided at the bottom of the container, which is in close contact with the outer wall of the inner liner and has good heat exchange capacity with the inner liner. When high-temperature hydrogen gas passes through the heat exchange tube, it conducts heat to the bottle for pressurization.

[0030] In this embodiment, the heat exchanger of the hydrogen supply system includes a heat source channel, a liquid hydrogen channel, and a heating channel. The heat source provides heat energy to the heat exchanger and has adjustable capabilities, including but not limited to hot water from vehicle engines, industrial waste heat, and electric auxiliary heating. The liquid hydrogen channel vaporizes the liquid hydrogen delivered to the heat exchanger by the hydrogen supply pipeline into hydrogen gas. In traditional systems, the vaporized hydrogen gas can be utilized. The heating channel provides heat energy to the solid hydrogen storage module and can adjust the heat energy output to the solid hydrogen storage module through a fluid pump.

[0031] In this embodiment, the one-way valve of the hydrogen supply system has one-way flow capability to prevent backflow when the valve is switched or the gas supply pressure is high.

[0032] In this embodiment, the solid hydrogen storage alloy will have a certain proportion of volume change when the temperature changes, so the structural material of the solid hydrogen storage module should have good elasticity to adapt to this characteristic.

[0033] In this embodiment, the ability to exchange heat well with the solid hydrogen storage module has a significant impact on the system's boosting capacity. Having a better heat exchange channel can effectively improve the system's boosting efficiency.

[0034] In this embodiment, when the hydrogen supply system 20 is turned on, the control system enters the pressurization demand judgment stage. The fluid pump 314, three-way valve 316, three-way valve 321, control valve 42, and control valve 45 remain closed; control valve 22 and control valve 29 remain open. When a first-level pressurization demand (hydrogen supply pressure below 0.5MPa) is received, the regulating valve 316 is opened to the heating channel of the first solid hydrogen storage module. At the same time, the fluid pump 314 is gradually started to 70%, and the three-way valve 321 is opened to the cooling channel of the second solid hydrogen storage module 306 to cool it down. Simultaneously, the control valve 22 is reduced to 50%. At this time, the pressurization system flows from the hydrogen released from the first solid hydrogen storage module 305 to the hydrogen absorbed from the second solid hydrogen storage module 306. The aforementioned operation time and specific opening value should refer to the specific values ​​obtained after experiments for different equipment. Here, it is only a quantitative judgment setting.

[0035] In this embodiment, when the pressure difference of the booster system is lower than the set value of 0.2 MPa, the three-way regulating valve 316 opens the heating channel of the second solid hydrogen storage module 306 and closes the heating channel of the first solid hydrogen storage module 305. Simultaneously, the three-way regulating valve 321 opens the cooling channel of the first solid hydrogen storage module 305 and closes the cooling channel of the second solid hydrogen storage module 306. At this time, the booster system flows from hydrogen release from the second solid hydrogen storage module 306 to hydrogen absorption from the first solid hydrogen storage module 305. The flow direction of the booster system is cyclical according to the above judgment, and the first solid hydrogen storage module 305 and the second solid hydrogen storage module 306 alternately perform hydrogen absorption and release actions.

[0036] In this embodiment, when the system receives a secondary boosting demand (hydrogen supply pressure below 0.2 MPa), in addition to the above-mentioned boosting system cycle, the auxiliary boosting system 40 is activated, the control valve 42 is gradually opened, the compressor 43 is powered on and running at 50% frequency, and the return gas control valve 45 is opened to 50%. The pressure obtained from the hydrogen supply pressure transmitter 28 is combined with PID parameters to control the compressor operating frequency. When the secondary boosting demand is withdrawn, the compressor 43 is stopped, the auxiliary boosting control valve 42 and the return gas control valve 45 are closed. The aforementioned operation time and specific opening value should refer to the specific values ​​obtained after experiments on different equipment. Here, it is only a quantitative judgment setting.

[0037] This invention can meet the requirement of rapid pressurization of hydrogen supply systems at low ambient temperatures. Furthermore, since the pressurization system of the hydrogen storage container 10 does not require a hydride compressor (auxiliary pressurization system 40 is optional), it significantly reduces initial costs, avoids system leakage, and increases the pressure and flow rate of the entire hydrogen supply system. Combined with continuously optimized algorithms and experimentally obtained system parameters, the system's capacity and efficiency can be continuously improved.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pressurization system for a liquid hydrogen storage container, characterized in that, The hydrogen storage container (10) includes an inner liner (11), a safety valve (12), a pressure transmitter (13), a high vacuum insulation layer (15), a pressurized heat exchange tube (310), and a shell (16). The high vacuum insulation layer (15) is fitted outside the inner liner (11), the pressurized heat exchange tube (310) is fitted outside the high vacuum insulation layer (15), and the shell (16) is fitted outside the pressurized heat exchange tube (310). Hydrogen supply system (20), the inlet end of which is connected to the liquid hydrogen zone of the hydrogen storage container (10); A pressurization system (300) is provided, wherein the heat source pipeline of the pressurization system (300) is connected to the heat exchanger (21) of the hydrogen supply system (20), the cold source pipeline of the pressurization system (300) is connected to the pipeline of the hydrogen supply system (20) after the heat exchanger (21), and the pipeline of the pressurization system (300) is connected to the inlet and outlet of the pressurization heat exchange pipe (310) provided at the bottom of the hydrogen storage container. The system includes a first solid hydrogen storage module (305), a second solid hydrogen storage module (306), an auxiliary pressurization circuit, and a control system (50). The control system (50) includes valves, sensors, and a master control. An auxiliary booster system (40) is provided, with its inlet end connected to the hydrogen supply system (20) and its outlet end divided into two paths, which are respectively connected to the hydrogen supply system (20) and the return gas port (14). The hydrogen supply system (20) includes a heat exchanger (21), which includes a liquid hydrogen flow channel and a heating flow channel for vaporizing the liquid hydrogen transported from the hydrogen supply pipeline (25) into the heat exchanger (21) into hydrogen gas. The outlet end of the hydrogen supply system (20) is connected to the inlet end of the heat exchanger (21), and the inlet end of the hydrogen supply system (20) is connected to the outlet end of the heat exchanger (21). The heating outlet end of the heat exchanger (21) is connected to the inlet end of the heating pipeline (311). 1) The heat inlet is connected to the outlet of the heat supply pipeline (311), the heat source inlet of the heat exchanger (21) is connected to the provided heat source outlet, and the heat source outlet of the heat exchanger (21) is connected to the provided heat source inlet. The provided heat source has adjustable capability. The pressurization system (300) includes the first solid hydrogen storage module (305) and the second solid hydrogen storage module (306). The heat source inlet of the first solid hydrogen storage module (305) is connected to the outlet of the heat supply pipeline (311). The heat source outlet of the first solid hydrogen storage module (305) is connected to the inlet of the heating pipeline (311); the heat source inlet of the second solid hydrogen storage module (306) is connected to the outlet of the heating pipeline (311); the heat source outlet of the second solid hydrogen storage module (306) is connected to the inlet of the heating pipeline (311); the outlet of the second solid hydrogen storage module (306) is connected to the inlet of the booster pipeline (301), and the booster system ( 300) also includes a cold source pipeline, wherein the cold source inlet of the first solid hydrogen storage module (305) is connected to the outlet of the hydrogen supply pipeline (25), and the cold source outlet of the first solid hydrogen storage module (305) is connected to the inlet of the hydrogen supply pipeline (25); the cold source inlet of the second solid hydrogen storage module (306) is connected to the outlet of the hydrogen supply pipeline (25), and the cold source outlet of the second solid hydrogen storage module (306) is connected to the inlet of the hydrogen supply pipeline (25).

2. The liquid hydrogen storage container pressurization system according to claim 1, characterized in that, The hydrogen storage container includes a return port (14), which is connected to the return gas pipeline (44) of the auxiliary pressurization system (40) to recover the high-pressure hydrogen generated by the auxiliary pressurization system (40) and pressurize the hydrogen storage container. The auxiliary pressurization system (40) includes an auxiliary pressurization pipeline (41), an auxiliary pressurization control valve (42), a compressor (43), and a return gas control valve (45). The auxiliary pressurization control valve (42) is used for rapid pressurization of the system in extreme environments. 2) The inlet end is connected to the outlet end of the hydrogen supply pipeline (25), the inlet end of the compressor (43) is connected to the outlet end of the auxiliary booster control valve (42), the inlet end of the return gas control valve (45) is connected to the outlet end of the compressor (43); the return gas control valve (45) is connected to the return gas port (14), the compressor (43) should be a metal hydride compressor, and the auxiliary booster control valve (42), the return gas control valve (45) and the compressor (43) have remote control and opening adjustment functions.

3. The liquid hydrogen storage container pressurization system according to claim 1, characterized in that, The hydrogen storage container includes a pressurization heat exchange tube (310) at the bottom of the container, which is connected to the main pipeline of the pressurization system (300).

4. The liquid hydrogen storage container pressurization system according to claim 1, characterized in that, The hydrogen supply system (20) also includes a cold source control valve (22), a one-way valve A (23), a one-way valve B (24), a buffer tank (26), a safety valve A (27), a pressure transmitter A (28), and a gas supply control valve (29), which are respectively installed on the hydrogen supply pipeline (25).

5. The liquid hydrogen storage container pressurization system according to claim 1, characterized in that, The hydrogen storage alloys selected for the first solid hydrogen storage module (305) and the second solid hydrogen storage module (306) should have suitable hydrogen absorption and desorption characteristics. Each kg of alloy should have a hydrogen desorption capacity of 2 NL / min at 80℃ under 3MPa, and a hydrogen absorption capacity at 20℃ and lower temperatures under 3MPa.

6. The liquid hydrogen storage container pressurization system according to claim 1, characterized in that, The pressurization system (300) further includes a first pressure transmitter (304), a gas filling port (302), a first temperature transmitter (303), a second pressure transmitter (307), a second temperature transmitter (308), a pressurization safety valve (309), a vent valve (312), a heating three-way regulating valve (316), a regenerative first check valve (317), a regenerative second check valve (318), a regenerative pipeline (319), a cooling pipeline (320), a cooling three-way regulating valve (321), a regenerative first check valve (322), a regenerative second check valve (323), and a regenerative pipeline (324). The first pressure transmitter (304) and the first temperature transmitter (303) are located at the outlet of the first solid hydrogen storage module (305), and the second pressure transmitter (307) and the second temperature transmitter (308) are located at the outlet of the second solid hydrogen storage module (306).

7. The liquid hydrogen storage container pressurization system according to claim 1, characterized in that, The pressurization system (300) also includes a safety valve A (27), which is installed on the pressurization pipeline (301) for the safe release of hydrogen when the pressure in the pressurization pipeline (301) exceeds the limit. The heating pipeline (311) of the pressurization system (300) uses a liquid working fluid with a temperature range of -30~120℃ and good specific heat capacity and fluidity. The pressurization system (300) is equipped with a fluid pump (314), an expansion tank (313), and an exhaust valve. 315), vent valve, the inlet of the fluid pump (314) and the outlet of the heating pipeline (311), the pressurization system (300) also includes a check valve and a three-way regulating valve, the check valve is set at the heat source outlet end and the cold source outlet end of the first solid hydrogen storage module (305) and the second solid hydrogen storage module (306), and the three-way regulating valve is set at the heat source inlet end and the cold source inlet end of the first solid hydrogen storage module (305) and the second solid hydrogen storage module (306).

Images