A hybrid hydrogen storage system

Abstract

The present invention discloses a hybrid hydrogen storage system, which includes a three-channel ortho-para converter, a first high-pressure hydrogen cylinder, and a second high-pressure hydrogen cylinder. The present invention designs a new type of hydrogen storage and supply system that combines high-pressure gaseous hydrogen storage and solid-state hydrogen storage, which can effectively avoid the defects of single high-pressure gaseous hydrogen storage or single solid-state hydrogen storage; by utilizing the characteristic that high-pressure hydrogen throttles and heats up when the temperature is higher than the conversion temperature, it is used to heat the hydrogen storage alloy to promote the hydrogen storage alloy to release hydrogen, reducing the input of external heat sources and avoiding the danger of methods such as electric heating; by using the ortho-para conversion cold energy released by the solid-state hydrogen storage device to pre-cool the hydrogen during filling, on the one hand, it can effectively prevent the safety hazards caused by the too high temperature of the high-pressure hydrogen storage cylinder, and on the other hand, it can increase the hydrogen storage capacity of the hydrogen storage alloy; through the innovative integration of the two hydrogen storage technologies, it is also possible to expand the hydrogen supply regulation range of the hybrid hydrogen storage system and reduce the dependence on the installation space, thereby enhancing the application potential of the hybrid hydrogen storage system.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy equipment, and in particular to a hybrid hydrogen storage system. Background Art

[0002] With the development of the national hydrogen energy strategy, the hydrogen energy industry in China has been rapidly promoted. The mainstream hydrogen storage methods include gaseous hydrogen storage, liquid hydrogen storage, and solid hydrogen storage. From the perspective of technological development direction, at present, the high-pressure gaseous hydrogen storage technology is relatively mature. However, due to the Joule-Thomson effect, when high-pressure hydrogen is filled into a hydrogen cylinder, it will expand inside the cylinder, resulting in an increase in the temperature inside the cylinder. Moreover, the higher the filling pressure, the faster the temperature rises. Due to the fast filling speed, the hydrogen storage cylinder cannot dissipate heat in time, and it may exceed 85°C stipulated by the current international standard, bringing great potential safety hazards.

[0003] The low-temperature liquid hydrogen storage method is to compress hydrogen and place it in a low-temperature environment to make it liquid, but it has high costs, low energy efficiency, and a large volume. Compared with high-pressure gaseous and liquid hydrogen storage, solid hydrogen storage has a high hydrogen storage capacity, does not require high-pressure or heat-insulating containers, and has no explosion risk. However, the solid hydrogen storage system will generate additional heat during hydrogen charging, and external heat input is required during hydrogen supply. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a hybrid hydrogen storage system that deeply combines high-pressure gaseous hydrogen storage and solid hydrogen storage to form a new type of combined hydrogen storage system, which can effectively avoid the defects of single high-pressure gaseous hydrogen storage or single solid hydrogen storage, and at the same time can further improve the hydrogen storage capacity, with strong safety and high energy utilization rate.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A hybrid hydrogen storage system includes a three-channel ortho-para converter, a first high-pressure hydrogen cylinder, and a second high-pressure hydrogen cylinder. The first high-pressure hydrogen cylinder and the second high-pressure hydrogen cylinder are connected to the same high-pressure hydrogen pipeline. The high-pressure hydrogen pipeline is connected to the same hydrogen power device through pipeline a and pipeline b. A first hydrogen storage alloy and a second hydrogen storage alloy are respectively installed on pipeline a and pipeline b. The first hydrogen storage alloy is connected to the first channel of the three-channel ortho-para converter through a first solid hydrogen supply pipeline and is connected to pipeline a, and the second hydrogen storage alloy is connected to the second channel of the three-channel ortho-para converter through a second solid hydrogen supply pipeline and is connected to pipeline b;

[0007] The third channel of the three-channel ortho-para converter is connected to a hydrogen filling pipeline, and the rear end of the hydrogen filling pipeline is connected to four branch pipelines. Branch one is connected to the first solid hydrogen supply pipeline, branch two is connected to the first high-pressure hydrogen cylinder, branch three is connected to the second solid hydrogen supply pipeline, and branch four is connected to the second high-pressure hydrogen cylinder.

[0008] Preferably, a hydrogen throttle is installed on the high-pressure hydrogen pipeline.

[0009] Preferably, the first hydrogen storage alloy is stored in a first solid-state hydrogen storage bottle, and the second hydrogen storage alloy is stored in a second solid-state hydrogen storage bottle. The first hydrogen storage alloy and the second hydrogen storage alloy are titanium-based hydrogen storage alloys of titanium iron, titanium manganese, and titanium nickel.

[0010] Preferably, the three-channel para-ortho converter has a three-channel gas-gas heat exchange structure, where the first channel and the second channel are filled with para-ortho hydrogen conversion catalysts, and when hydrogen passes through, para-ortho conversion occurs to absorb cold energy.

[0011] Preferably, a first high-pressure hydrogen supply valve and a second high-pressure hydrogen supply valve are respectively installed at the output ends of the first high-pressure hydrogen bottle and the second high-pressure hydrogen bottle in a one-to-one correspondence.

[0012] Preferably, a first low-pressure hydrogen supply valve and a second low-pressure hydrogen supply valve are respectively installed on pipeline a and pipeline b in a one-to-one correspondence, and a first solid-state hydrogen supply valve and a second solid-state hydrogen supply valve are respectively installed on the first solid-state hydrogen supply pipeline and the second solid-state hydrogen supply pipeline in a one-to-one correspondence.

[0013] Preferably, a first solid-state hydrogen filling valve and a second solid-state hydrogen filling valve are respectively installed on branch one and branch three in a one-to-one correspondence, and a first high-pressure hydrogen filling valve and a second high-pressure hydrogen filling valve are respectively installed on branch two and branch four in a one-to-one correspondence.

[0014] Preferably, the hydrogen power device is a hydrogen fuel engine or a hydrogen-oxygen fuel cell.

[0015] Preferably, the exteriors of the first high-pressure hydrogen bottle and the second high-pressure hydrogen bottle are made of high-strength heat-insulating materials.

[0016] Preferably, pipeline a and pipeline b are in a coiled tube structure inside the first hydrogen storage alloy and the second hydrogen storage alloy.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention designs a new hydrogen storage and supply system that combines high-pressure gaseous hydrogen storage and solid-state hydrogen storage, which can effectively avoid the defects of single high-pressure gaseous hydrogen storage or single solid-state hydrogen storage; Utilizing the characteristic that high-pressure hydrogen throttles and heats up when the temperature is greater than the inversion temperature, it is used to heat the hydrogen storage alloy to promote the release of hydrogen from the hydrogen storage alloy, reducing the input of external heat sources and avoiding the danger of methods such as electric heating; Using the para-ortho conversion cold energy released by the solid-state hydrogen storage device to pre-cool the hydrogen to be filled. On the one hand, it can effectively prevent the safety hazards caused by the over-high temperature of the high-pressure hydrogen storage bottle, and on the other hand, it can increase the hydrogen storage capacity of the hydrogen storage alloy; By innovatively integrating the two hydrogen storage technologies, it is also possible to expand the hydrogen supply adjustment range of the hybrid hydrogen storage system and reduce the dependence on the installation space, thereby enhancing the application potential of the hybrid hydrogen storage system. Description of the Drawings

[0018] To more specifically and intuitively illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0019] Figure 1 It is a schematic structural diagram of a hybrid hydrogen storage system of the present invention.

[0020] In the figure: high-pressure hydrogen pipeline 1, first high-pressure hydrogen cylinder 2, first high-pressure hydrogen supply valve 3, second high-pressure hydrogen cylinder 4, second high-pressure hydrogen supply valve 5, hydrogen throttle 6, first low-pressure hydrogen supply valve 7, first solid-state hydrogen storage cylinder 8, first hydrogen storage alloy 9, hydrogen power unit 10, second low-pressure hydrogen supply valve 11, second solid-state hydrogen storage cylinder 12, second hydrogen storage alloy 13, first solid-state hydrogen supply pipeline 14, first solid-state hydrogen supply valve 15, three-channel para-ortho converter 16, second solid-state hydrogen supply pipeline 17, second solid-state hydrogen supply valve 18, hydrogen filling pipeline 19, first solid-state hydrogen charging valve 20, first high-pressure hydrogen charging valve 21, second solid-state hydrogen charging valve 22, second high-pressure hydrogen charging valve 23. Specific Embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Refer to Figure 1 , a solid-liquid hybrid hydrogen storage system, including high-pressure hydrogen pipeline 1, first high-pressure hydrogen cylinder 2, first high-pressure hydrogen supply valve 3, second high-pressure hydrogen cylinder 4, second high-pressure hydrogen supply valve 5, hydrogen throttle 6, first low-pressure hydrogen supply valve 7, first solid-state hydrogen storage cylinder 8, first hydrogen storage alloy 9, hydrogen power unit 10, second low-pressure hydrogen supply valve 11, second solid-state hydrogen storage cylinder 12, second hydrogen storage alloy 13, first solid-state hydrogen supply pipeline 14, first solid-state hydrogen supply valve 15, three-channel para-ortho converter 16, second solid-state hydrogen supply pipeline 17, second solid-state hydrogen supply valve 18, hydrogen filling pipeline 19, first solid-state hydrogen charging valve 20, first high-pressure hydrogen charging valve 21, second solid-state hydrogen charging valve 22, second high-pressure hydrogen charging valve 23.

[0023] The three-channel para-ortho converter 16 is a three-channel gas-gas heat exchange structure, in which the first channel and the second channel are filled with para-ortho hydrogen conversion catalysts, and when hydrogen passes through, para-ortho conversion occurs to absorb cold energy.

[0024] The hydrogen power unit 10 can be a hydrogen fuel engine or a hydrogen-oxygen fuel cell;

[0025] The first hydrogen storage alloy 9 and the second hydrogen storage alloy 13 are titanium-based hydrogen storage alloys such as titanium-iron, titanium-manganese, and titanium-nickel that have relatively low requirements for heating temperature;

[0026] The first solid-state hydrogen storage bottle 8 and the second solid-state hydrogen storage bottle 12 are made of high-strength heat-insulating material to prevent the ambient temperature from affecting the hydrogen storage alloy;

[0027] Branch a and branch b of the high-pressure hydrogen pipeline 1 are in the form of high-efficiency heat exchange such as coils inside the hydrogen storage alloy, thereby increasing the heat exchange efficiency between the pipeline and the hydrogen storage alloy.

[0028] The front end of the high-pressure hydrogen pipeline 1 is connected to two branches for providing a high-pressure hydrogen source. The first branch is connected to the first high-pressure hydrogen bottle 2 and the first high-pressure hydrogen supply valve 3 in sequence, and the second branch is connected to the second high-pressure hydrogen bottle 4 and the second high-pressure hydrogen supply valve 5 in sequence. Then the two branches are merged and passed through the hydrogen throttle 6 for decompression and temperature increase, and are divided into two branches again. The first branch is connected to the first low-pressure hydrogen supply valve 7 and the first hydrogen storage alloy 9 of the first solid-state hydrogen storage bottle 8 in sequence, and the second branch is connected to the second low-pressure hydrogen supply valve 11 and the second hydrogen storage alloy 13 of the second solid-state hydrogen storage bottle 12 in sequence. The hydrogen after decompression and temperature increase is used to prompt the first hydrogen storage alloy 9 and the second hydrogen storage alloy 13 to release hydrogen. Then the two branches are merged again and connected to the hydrogen power device 10.

[0029] The first hydrogen storage alloy 9 is placed inside the first solid-state hydrogen storage bottle 8, and the second hydrogen storage alloy 13 is placed inside the second solid-state hydrogen storage bottle 12, which are used to store hydrogen medium. The high-temperature hydrogen flowing through the high-pressure hydrogen pipeline 1 does not directly contact the first hydrogen storage alloy 9 and the second hydrogen storage alloy 13. The temperature control of the first hydrogen storage alloy 9 and the second hydrogen storage alloy 13 is achieved through the heat exchange structure.

[0030] The first solid-state hydrogen supply pipeline 14 is connected in sequence to the first hydrogen storage alloy 9 of the first solid-state hydrogen storage bottle 8, the first solid-state hydrogen supply valve 15, the first channel of the three-channel secondary positive converter 16, and the hydrogen power generator 10. The second solid-state hydrogen supply pipeline 17 is connected in sequence to the second hydrogen storage alloy 13 of the second solid-state hydrogen storage bottle 12, the second solid-state hydrogen supply valve 18, the second channel of the three-channel secondary positive converter 16, and the hydrogen power generator 10, and releases hydrogen from the first hydrogen storage alloy 9 and the second hydrogen storage alloy 13 to the hydrogen power generator 10 for reaction.

[0031] The front end of the hydrogen filling pipeline 19 passes through the third channel of the three-channel secondary positive converter 16, and then is divided into four branches. The first branch is connected to the first solid-state hydrogen filling valve 20 and the first hydrogen storage alloy 9 of the first solid-state hydrogen storage bottle 8 in sequence, the second branch is connected to the first high-pressure hydrogen filling valve 21 and the first high-pressure hydrogen bottle 2 in sequence, the third branch is connected to the second solid-state hydrogen filling valve 22 and the second hydrogen storage alloy 13 of the second solid-state hydrogen storage bottle 12 in sequence, and the fourth branch is connected to the second high-pressure hydrogen filling valve 23 and the second high-pressure hydrogen bottle 4 in sequence to realize hydrogen filling of the hydrogen storage device.

[0032] The operating principle of a hybrid hydrogen storage system is as follows: the operating process is mainly divided into two stages, the first stage is the hydrogen supply stage, and the second stage is the hydrogen filling stage.

[0033] First, assume that the first high-pressure hydrogen cylinder 2 and the first solid-state hydrogen storage cylinder 8 operate jointly, with both filled with hydrogen medium. The second high-pressure hydrogen cylinder 4 and the second solid-state hydrogen storage cylinder 12 operate jointly, and the hydrogen medium inside them has been released. In addition, there are also cases where the first high-pressure hydrogen cylinder 2 and the second solid-state hydrogen storage cylinder 12 operate jointly, and the second high-pressure hydrogen cylinder 4 and the first solid-state hydrogen storage cylinder 8 operate jointly. The principle is the same as the above combinations.

[0034] Initial valve states: The first high-pressure hydrogen supply valve 3, the first low-pressure hydrogen supply valve 7, the first solid-state hydrogen supply valve 15, the second solid-state hydrogen filling valve 22, and the second high-pressure hydrogen filling valve 23 are open; the second high-pressure hydrogen supply valve 5, the second low-pressure hydrogen supply valve 11, the second solid-state hydrogen supply valve 18, the first solid-state hydrogen filling valve 20, and the first high-pressure hydrogen filling valve 21 are closed.

[0035] (1) The high-pressure hydrogen from the first high-pressure hydrogen cylinder 2 first enters the hydrogen throttler 6 through the first high-pressure hydrogen supply valve 3 for pressure reduction and temperature increase, becoming high-temperature and low-pressure hydrogen. Subsequently, it enters the first hydrogen storage alloy 9 of the first solid-state hydrogen storage cylinder 8 through the first low-pressure hydrogen supply valve 7, uses its sensible heat to heat the first hydrogen storage alloy 9, and then enters the hydrogen power device 10 for reaction. After the first hydrogen storage alloy 9 absorbs heat, it releases hydrogen, and then enters the first solid-state hydrogen supply pipeline 14, and enters the first channel of the three-channel para-ortho converter 16 through the first solid-state hydrogen supply valve 15, and undergoes para-ortho conversion under the action of a catalyst to generate cold, and then mixes with the hydrogen in the high-pressure hydrogen pipeline 1 and enters the hydrogen power device 10 for reaction.

[0036] (2) The filled high-pressure hydrogen enters the hydrogen filling pipeline 19, first enters the third channel of the three-channel para-ortho converter 16 to absorb cold and cool down, and then is divided into two paths. One path enters the second solid-state hydrogen storage cylinder 12 through the second solid-state hydrogen filling valve 22, stores hydrogen inside the second hydrogen storage alloy 13, and the low-temperature hydrogen absorbs part of the reaction heat generated by the second hydrogen storage alloy 13 storing hydrogen to increase its storage capacity. The other path enters the second high-pressure hydrogen cylinder 4 through the second high-pressure hydrogen filling valve 23 for high-pressure storage, and the low-temperature hydrogen can effectively prevent potential safety hazards caused by excessive internal temperature of the second high-pressure hydrogen cylinder 4.

[0037] (3) When the first high-pressure hydrogen cylinder 2 and the first solid-state hydrogen storage cylinder 8 have released hydrogen and the second high-pressure hydrogen cylinder 4 and the second solid-state hydrogen storage cylinder 12 have been filled with hydrogen, then alternate operation is carried out. Open the second high-pressure hydrogen supply valve 5, the second low-pressure hydrogen supply valve 11, the second solid-state hydrogen supply valve 18, the first solid-state hydrogen filling valve 20, and the first high-pressure hydrogen filling valve 21, and close the first high-pressure hydrogen supply valve 3, the first low-pressure hydrogen supply valve 7, the first solid-state hydrogen supply valve 15, the second solid-state hydrogen filling valve 22, and the second high-pressure hydrogen filling valve 23.

[0038] (4) The high-pressure hydrogen from the second high-pressure hydrogen cylinder 4 first enters the hydrogen throttler 6 through the second high-pressure hydrogen supply valve 5 for pressure reduction and temperature increase, becoming high-temperature and low-pressure hydrogen. Subsequently, it enters the second solid-state hydrogen storage cylinder 12 through the second low-pressure hydrogen supply valve 11 and reaches the second hydrogen storage alloy 13, heating the second hydrogen storage alloy 13 with its sensible heat. Then it enters the hydrogen power unit 10 for reaction. After the second hydrogen storage alloy 13 absorbs heat, it releases hydrogen, and then enters the second solid-state hydrogen supply pipeline 17. It enters the second channel of the three-channel para-ortho converter 16 through the second solid-state hydrogen supply valve 18, and undergoes para-ortho conversion under the action of a catalyst to generate cold. Subsequently, it mixes with the hydrogen in the high-pressure hydrogen pipeline 1 and enters the hydrogen power unit 10 for reaction.

[0039] (5) The charged high-pressure hydrogen enters the hydrogen filling pipeline 19, first enters the third channel of the three-channel para-ortho converter 16 to absorb cold and cool down. Subsequently, it is divided into two paths. One path enters the first solid-state hydrogen storage cylinder 8 through the first solid-state hydrogen filling valve 20, storing hydrogen inside the first hydrogen storage alloy 9. The low-temperature hydrogen absorbs part of the reaction heat generated by the first hydrogen storage alloy 9 storing hydrogen, increasing its storage capacity. The other path enters the first high-pressure hydrogen cylinder 2 through the first high-pressure hydrogen filling valve 21 for high-pressure storage. The low-temperature hydrogen can effectively prevent potential safety hazards caused by excessive internal temperature in the first high-pressure hydrogen cylinder 2.

[0040] After the above steps are completed, return to step (1) and operate in a reciprocating cycle.

[0041] In addition, when the first high-pressure hydrogen cylinder 2, the second high-pressure hydrogen cylinder 4, the first solid-state hydrogen storage cylinder 8, and the second solid-state hydrogen storage cylinder 12 are all filled with hydrogen medium, the hybrid hydrogen storage system can also achieve large-flow hydrogen supply in a short time. First, assume that all valves are in the closed state.

[0042] (1) Open the first high-pressure hydrogen supply valve 3, the second high-pressure hydrogen supply valve 5, the first low-pressure hydrogen supply valve 7, the second low-pressure hydrogen supply valve 11, the first solid-state hydrogen supply valve 15, and the second solid-state hydrogen supply valve 18.

[0043] (2) The high-pressure hydrogen from the first high-pressure hydrogen cylinder 2 first enters the hydrogen throttler 6 through the first high-pressure hydrogen supply valve 3 for pressure reduction and temperature increase, becoming high-temperature and low-pressure hydrogen. Subsequently, it enters the first solid-state hydrogen storage cylinder 8 through the first low-pressure hydrogen supply valve 7 and reaches the first hydrogen storage alloy 9, heating the first hydrogen storage alloy 9 with its sensible heat. Then it enters the hydrogen power unit 10 for reaction. After the first hydrogen storage alloy 9 absorbs heat, it releases hydrogen, and then enters the first solid-state hydrogen supply pipeline 14. It enters the first channel of the three-channel para-ortho converter 16 through the first solid-state hydrogen supply valve 15, and undergoes para-ortho conversion under the action of a catalyst to generate cold. Subsequently, it mixes with the hydrogen in the high-pressure hydrogen pipeline 1 and enters the hydrogen power unit 10 for reaction.

[0044] (3) The high-pressure hydrogen from the second high-pressure hydrogen cylinder 4 first enters the hydrogen throttle 6 through the second high-pressure hydrogen supply valve 5 for pressure reduction and temperature increase, becoming high-temperature and low-pressure hydrogen. Subsequently, it enters the second hydrogen storage alloy 13 of the second solid-state hydrogen storage cylinder 12 through the second low-pressure hydrogen supply valve 11, heating the second hydrogen storage alloy 13 with its sensible heat. Then it enters the hydrogen power unit 10 for reaction. After absorbing heat, the second hydrogen storage alloy 13 releases hydrogen, and then enters the second solid-state hydrogen supply pipeline 17. It enters the second channel of the three-channel para-to-ortho converter 16 through the second solid-state hydrogen supply valve 18, and undergoes para-to-ortho conversion under the action of a catalyst to generate cold. Subsequently, it is mixed with the hydrogen in the high-pressure hydrogen pipeline 1 and enters the hydrogen power unit 10 for reaction.

[0045] That is, the first high-pressure hydrogen cylinder 2, the second high-pressure hydrogen cylinder 4, the first solid-state hydrogen storage cylinder 8, and the second solid-state hydrogen storage cylinder 12 operate jointly to supply hydrogen to the hydrogen power unit 10 together to meet its large-flow hydrogen supply requirement.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A hybrid hydrogen storage system, comprising a three-channel para-to-ortho converter (16), a first high-pressure hydrogen cylinder (2) and a second high-pressure hydrogen cylinder (4), characterized in that, The first high-pressure hydrogen cylinder (2) and the second high-pressure hydrogen cylinder (4) are connected to the same high-pressure hydrogen pipeline (1). The high-pressure hydrogen pipeline (1) is connected to the same hydrogen power unit (10) through pipeline a and pipeline b. A first hydrogen storage alloy (9) and a second hydrogen storage alloy (13) are respectively installed on pipeline a and pipeline b. The first hydrogen storage alloy (9) is connected to the first channel of a three-channel para-ortho converter (16) through a first solid-state hydrogen supply pipeline (14) and is connected to pipeline a. The second hydrogen storage alloy (13) is connected to the second channel of the three-channel para-ortho converter (16) through a second solid-state hydrogen supply pipeline (17) and is connected to pipeline b; The third channel of the three-channel para-ortho converter (16) is connected to a hydrogen filling pipeline (19). The rear end of the hydrogen filling pipeline (19) is connected to four branch pipelines. The first branch is connected to the first solid-state hydrogen supply pipeline (14), the second branch is connected to the first high-pressure hydrogen cylinder (2), the third branch is connected to the second solid-state hydrogen supply pipeline (17), and the fourth branch is connected to the second high-pressure hydrogen cylinder (4); A hydrogen throttle (6) is installed on the high-pressure hydrogen pipeline (1); The first hydrogen storage alloy (9) is stored in a first solid-state hydrogen storage bottle (8), and the second hydrogen storage alloy (13) is stored in a second solid-state hydrogen storage bottle (12). When the first high-pressure hydrogen cylinder (2) and the first solid-state hydrogen storage bottle (8) have finished releasing hydrogen and the second high-pressure hydrogen cylinder (4) and the second solid-state hydrogen storage bottle (12) have finished hydrogen filling, they will operate alternately.

2. The hybrid hydrogen storage system according to claim 1, wherein The first hydrogen storage alloy (9) and the second hydrogen storage alloy (13) are titanium-based hydrogen storage alloys of titanium iron, titanium manganese, and titanium nickel.

3. A hybrid hydrogen storage system according to claim 2, characterized in that, The three-channel para-ortho converter (16) is a three-channel gas-gas heat exchange structure. The first channel and the second channel are filled with para-ortho hydrogen conversion catalysts, and when hydrogen passes through, para-ortho conversion occurs and cold energy is absorbed.

4. A hybrid hydrogen storage system according to claim 2, wherein, The output ends of the first high-pressure hydrogen cylinder (2) and the second high-pressure hydrogen cylinder (4) are respectively and correspondingly installed with a first high-pressure hydrogen supply valve (3) and a second high-pressure hydrogen supply valve (5).

5. A hybrid hydrogen storage system according to claim 4, characterized in that, A first low-pressure hydrogen supply valve (7) and a second low-pressure hydrogen supply valve (11) are respectively and correspondingly installed on pipeline a and pipeline b. A first solid-state hydrogen supply valve (15) and a second solid-state hydrogen supply valve (18) are respectively and correspondingly installed on the first solid-state hydrogen supply pipeline (14) and the second solid-state hydrogen supply pipeline (17).

6. The hybrid hydrogen storage system according to claim 5, wherein, A first solid-state hydrogen filling valve (20) and a second solid-state hydrogen filling valve (22) are respectively and correspondingly installed on the first branch and the third branch. A first high-pressure hydrogen filling valve (21) and a second high-pressure hydrogen filling valve (23) are respectively and correspondingly installed on the second branch and the fourth branch.

7. A hybrid hydrogen storage system according to claim 6, characterized in that, The hydrogen power unit (10) is a hydrogen fuel engine or a hydrogen-oxygen fuel cell.

8. A hybrid hydrogen storage system according to claim 7, characterized in that, The exteriors of the first high-pressure hydrogen cylinder (2) and the second high-pressure hydrogen cylinder (4) are made of high-strength heat-insulating materials.

9. The hybrid hydrogen storage system according to claim 8, characterized in that, Pipeline a and pipeline b are in a coil structure inside the first hydrogen storage alloy (9) and the second hydrogen storage alloy (13).

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