CN213930385U - Low-temperature vehicle-mounted liquid hydrogen bottle - Google Patents

Low-temperature vehicle-mounted liquid hydrogen bottle Download PDF

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Publication number
CN213930385U
CN213930385U CN202022864944.7U CN202022864944U CN213930385U CN 213930385 U CN213930385 U CN 213930385U CN 202022864944 U CN202022864944 U CN 202022864944U CN 213930385 U CN213930385 U CN 213930385U
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China
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thickness
end socket
inner container
interlayer
cavity
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CN202022864944.7U
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Chinese (zh)
Inventor
苏红艳
邱芳
赵亚丽
王朝
王杰
刘庆洋
施海涛
马小红
何春辉
周佳琪
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Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd
Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
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Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd
Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
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Abstract

The utility model discloses a low temperature vehicle-mounted liquid hydrogen bottle, include: the inner container front end socket is fixedly connected with the outer shell front end socket through a header and a front supporting neck pipe, the inner container rear end socket is fixedly connected with the outer shell rear end socket through a rear supporting shaft, a heat insulation interlayer is wound on the outer wall of the inner container, and a vacuum interlayer is formed between the heat insulation interlayer and the outer shell; a dehydrogenation cavity is fixedly arranged on the inner wall of the front end socket of the inner container, the hydrogen delivery pipeline group hermetically penetrates through the corresponding through holes in the header, the front support neck pipe and the dehydrogenation cavity wall and then extends into the inner container, and the dehydrogenation cavity is filled with a first composite hydrogen absorbent; the inner wall of the liner rear end socket is fixedly provided with a buffer cavity, a plurality of wave-shaped wave-proof plates with wave-shaped bent plate structures and horizontal groove-shaped through holes are uniformly and alternately arranged in the liner barrel body along the axial direction of the liner, and the axial inclination angle alpha between each wave-proof plate and the axis of the liner is 70-80 degrees. The structure is simple, the heat insulation and cold insulation effects are good, and the fluctuation and impact of liquid in the bottle can be reduced.

Description

Low-temperature vehicle-mounted liquid hydrogen bottle
Technical Field
The utility model relates to an on-vehicle hydrogen storage equipment especially relates to an on-vehicle liquid hydrogen bottle of low temperature.
Background
With the increasing prominence of global warming problems and the encouragement of development and utilization of hydrogen energy in various countries, more hydrogen fuel cell automobiles are put into the market. Compared with a fuel automobile or an electric automobile, the hydrogen fuel cell automobile takes the vehicle-mounted hydrogen storage system as a power source and takes hydrogen as a fuel source of the fuel cell stack, so the development of the vehicle-mounted hydrogen storage technology directly influences the endurance mileage, the cost and the safety of the fuel cell automobile.
At present, the vehicle-mounted hydrogen storage system in China uses a high-pressure gas cylinder as a hydrogen storage container to store high-pressure hydrogen of 35MPa and 70 MPa. However, due to the limitation of the physical characteristics of hydrogen, the volume hydrogen storage density of the high-pressure hydrogen storage bottle is only 25g/L at most, and the research and development targets of the vehicle-mounted hydrogen storage technology that the mass hydrogen storage density is 7.5 percent, the volume energy density is 70 g/L and the subsequent mileage exceeds 500km after one-time hydrogenation formulated by the U.S. department of energy are not reached.
Like liquefied natural gas, to increase the hydrogen storage density of a vehicle-mounted hydrogen storage system, hydrogen liquefaction and liquid hydrogen storage and transportation filling technologies are actively developed in China at present. The low-temperature liquid hydrogen storage is to compress hydrogen and then cool the hydrogen to below-252 ℃ so as to liquefy the hydrogen and store the liquefied hydrogen in a heat-insulating vacuum container. Compared with high-pressure gaseous hydrogen storage, the low-temperature liquid hydrogen storage has greatly improved hydrogen storage quality and volume hydrogen storage energy density. However, because the liquid hydrogen has very low boiling point (-253 ℃), small vaporization latent heat (0.45 kJ/g) and large gas-liquid specific volume (845 times), how to realize ultralow-temperature liquid hydrogen storage and avoid and reduce evaporation loss are the core problems of the vehicle-mounted liquid hydrogen storage technology.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve is: the low-temperature vehicle-mounted liquid hydrogen bottle has the advantages of simple structure, convenience in manufacturing, good heat insulation and cold insulation effects and capability of realizing batch production. The design of the plurality of the wave-proof plates in the low-temperature vehicle-mounted liquid hydrogen bottle can effectively reduce the fluctuation and impact of liquid in the bottle.
In order to solve the above problem, the utility model adopts the following technical scheme: the on-vehicle liquid hydrogen bottle of low temperature includes: the inner container consists of an inner container front end socket, an inner container barrel and an inner container rear end socket, and the outer container consists of an outer container front end socket, an outer container barrel and an outer container rear end socket; the inner container front end socket is fixedly connected with the shell front end socket through the header and the front support neck pipe, and the inner container rear end socket is fixedly connected with the shell rear end socket through the rear support shaft, so that the inner container is suspended and supported in the cavity of the shell body; a buffer cavity with a cavity is fixedly arranged on the inner wall of the inner container rear end socket; the method is characterized in that: a heat insulation interlayer is wound on the outer wall of the inner container, and a vacuum interlayer is formed between the heat insulation interlayer and the outer shell; a dehydrogenation cavity of a front support neck pipe of a sealing cover is fixedly arranged on the inner wall of the front end socket of the inner container, the hydrogen delivery pipeline group hermetically penetrates through the header, the front support neck pipe and the corresponding through holes on the dehydrogenation cavity wall and then extends into the inner container, and a first composite hydrogen absorbent for absorbing leaked hydrogen is filled in the dehydrogenation cavity; a plurality of wave-proof plates are uniformly and fixedly arranged in the liner barrel body at intervals along the axial direction of the liner, each wave-proof plate is obliquely inclined backwards, and the axial inclination angle alpha between each wave-proof plate and the axis of the liner is 70-80 degrees; the wave-proof plate is a wave-shaped bent plate structure formed by repeatedly bending the left end to the right end back and forth, a plurality of horizontal groove-shaped through holes are formed in the wave-proof plate, and the horizontal groove-shaped through holes are uniformly distributed at intervals from top to bottom.
Further, in the low-temperature vehicle-mounted liquid hydrogen bottle, the distance L between every two adjacent wave-proof plates is 300-350 mm.
Further, the low-temperature vehicle-mounted liquid hydrogen bottle comprises a heat insulation interlayer, wherein the heat insulation interlayer is formed by winding a low-density heat insulation interlayer, a medium-density heat insulation interlayer and a high-density heat insulation interlayer from inside to outside in sequence, the low-density heat insulation interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 3mm and a bright and clean aluminum foil with the thickness of 0.5mm and superposed on the glass fiber cotton, the medium-density heat insulation interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 2mm and a bright and clean aluminum foil with the thickness of 0.5mm and superposed on the glass fiber cotton, and the high-density heat insulation interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 1mm and a bright and clean aluminum foil with the thickness of 0.5mm and superposed on the glass fiber cotton.
Further, in the low-temperature vehicle-mounted liquid hydrogen bottle, the vacuum degree of the vacuum interlayer is (2.0 ± 0.2) × 10- 3Pa; in the outer casingThe inner wall of the body is coated with a smooth aluminum foil layer with the thickness of 0.5 mm.
Further, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, the inner container, the heat insulation interlayer, and the outer shell are coaxial, and the thickness ratio a of the thickness a of the inner container, the total thickness B of the heat insulation interlayer and the vacuum interlayer, and the thickness C of the outer shell is: b: c = (0.6-0.8): (15-18): 1.
further, in the low-temperature vehicle-mounted liquid hydrogen bottle, the thickness ratio of the thickness of the low-density heat insulation interlayer B1, the thickness of the medium-density heat insulation interlayer B2, the thickness of the high-density heat insulation interlayer B3 and the thickness of the vacuum interlayer B4 is B1: b2: b3: b4= 4: 3: 2: 1.
further, in the low-temperature vehicle-mounted liquid hydrogen bottle, the vacuum interlayer is filled with a second composite hydrogen absorbing agent for absorbing the hydrogen leakage and the impurity gas released by the heat insulation interlayer.
Further, in the low-temperature vehicle-mounted liquid hydrogen bottle, the first composite hydrogen absorbing agent filled in the dehydrogenation cavity and the second composite hydrogen absorbing agent filled in the vacuum interlayer are both a mixture formed by mixing copper oxide, a molecular sieve and palladium oxide; the weight ratio of copper oxide to molecular sieve to palladium oxide is 1: (8-10): (2-4).
Further, in the low-temperature vehicle-mounted liquid hydrogen bottle, the particle size of the second composite hydrogen absorbent filled in the vacuum interlayer is 15 to 20 micrometers.
Further, in the low-temperature vehicle-mounted liquid hydrogen bottle, the filtering device is mounted on the vacuumizing port of the outer shell, and the filtering precision of the filtering device is not more than 15 microns.
The utility model has the advantages that: firstly, the first composite hydrogen absorbing agent filled in the dehydrogenation cavity and the second composite hydrogen absorbing agent filled in the vacuum interlayer can absorb leaked hydrogen and impurity gas released from the heat insulation interlayer, so that the leakage rate and the vacuum degree requirements of the vacuum interlayer are effectively ensured; due to the design of the plurality of wave-proof plates, the fluctuation and impact of liquid in the bottle can be effectively reduced, and the service life of the low-temperature vehicle-mounted liquid hydrogen bottle is prolonged; thirdly, according to the temperature change from the low-temperature area to the high-temperature area between the inner container and the outer shell, a low-density heat insulation interlayer, a medium-density heat insulation interlayer, a high-density heat insulation interlayer and a vacuum interlayer are arranged, so that the overall heat insulation efficiency of the low-temperature vehicle-mounted liquid hydrogen bottle is improved by 30% or more; in addition, the aluminum foil composite glass fiber cloth consisting of the glass fiber cotton and the bright and clean aluminum foil superposed on the glass fiber cotton can realize uniform winding and realize batch production.
Drawings
Fig. 1 is a schematic perspective view of the low-temperature vehicle-mounted liquid hydrogen bottle of the present invention.
Fig. 2 is the internal structure schematic diagram of the low-temperature vehicle-mounted liquid hydrogen bottle of the utility model.
Fig. 3 is a schematic structural view of the breakwater.
Fig. 4 is a partial internal structure diagram between the inner container and the outer shell.
Fig. 5 is a partially enlarged schematic view of fig. 2.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
Example one
As shown in fig. 1, 2 and 5, the low-temperature vehicle-mounted liquid hydrogen bottle according to the present embodiment includes: the bottle body structure comprises an inner container 2 and an outer shell 1, wherein the inner container 2 is of a bottle body structure formed by an inner container front end socket 21, an inner container barrel 22 and an inner container rear end socket 23, and the outer shell 1 is of a bottle body structure formed by an outer shell front end socket 11, an outer shell barrel 12 and an outer shell rear end socket 13. The liner front end socket 21 is fixedly connected with the shell front end socket 11 through a header 31 and a front support neck tube 32, and the liner rear end socket 23 is fixedly connected with the shell rear end socket 13 in a sealing manner through a rear support shaft 33, so that the liner 2 is suspended and supported in the cavity of the shell body 1. The outer wall of the inner container is wound with a heat insulation interlayer 4, and a vacuum interlayer 5 is formed between the heat insulation interlayer 4 and the outer shell 1. The inner wall of the inner container front end socket 21 is fixedly provided with a dehydrogenation cavity 34 for sealing and covering the front support neck pipe 32, the hydrogen delivery pipeline group 35 hermetically penetrates through the header 31, the front support neck pipe 32 and the corresponding through holes in the dehydrogenation cavity wall and then extends into the inner container 2, and the dehydrogenation cavity 34 is filled with a first composite hydrogen absorbent for absorbing trace hydrogen leakage at the welding seam joint of the hydrogen delivery pipeline group positioned between the header 31 and the dehydrogenation cavity 34. The first composite hydrogen absorbing agent filled in the dehydrogenation cavity 34 is a mixture of copper oxide, a molecular sieve and palladium oxide; the weight ratio of copper oxide to molecular sieve to palladium oxide is 1: (8-10): (2-4).
The inner wall of the inner container rear end socket 23 is fixedly provided with a buffer cavity 36 with a cavity, the buffer cavity 36 is provided with a small hole communicated with the inner cavity of the buffer cavity 36, the buffer cavity 36 is used for gas phase space buffer storage, the pressure in the vehicle-mounted liquid hydrogen bottle is adjusted, and the phenomenon of over-filling is prevented.
As shown in fig. 2 and 3, a plurality of the breakwaters 6 are fixedly arranged in the liner cylinder 22 at even intervals along the liner axial direction, each breakwater 6 is inclined backward, the axial inclination angle α between each breakwater 6 and the liner axial line is 70 to 80 °, and the distance L between every two adjacent breakwaters 6 is 300 to 350 mm. The breakwater 6 is a wave-shaped bent plate structure formed by repeatedly bending the left end to the right end back and forth, a plurality of horizontal groove-shaped through holes 61 are formed in the breakwater 6, and the horizontal groove-shaped through holes 61 are uniformly distributed at intervals from top to bottom. The design of the plurality of the wave-proof plates 6 can effectively reduce the fluctuation and the impact of liquid in the bottle.
Example two
In this embodiment, the heat insulating interlayer 4 is further designed based on the first embodiment.
In the low-temperature container with the heat insulation interlayer 4, when the temperature is higher or in a high-temperature section of the heat insulation interlayer, the heat radiation accounts for more than 80% of the total heat transfer, the corresponding solid heat conduction, gas heat conduction and gas convection heat transfer can be ignored, and the proportion of the heat conduction is obviously increased on the side with lower temperature or close to the low-temperature liquid in the heat insulation interlayer.
As shown in fig. 2 and 4, in the present embodiment, the heat insulating interlayer 4 is composed of a low-density heat insulating interlayer 41, a medium-density heat insulating interlayer 42 and a high-density heat insulating interlayer 43 in sequence from inside to outside, the low-density heat insulating interlayer 41 is formed by winding an aluminum foil composite glass fiber cloth composed of a glass fiber cotton with a thickness of 3mm and a bright and clean aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton, the medium-density heat insulating interlayer 42 is formed by winding an aluminum foil composite glass fiber cloth composed of a glass fiber cotton with a thickness of 2mm and a bright and clean aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton, and the high-density heat insulating interlayer 43 is formed by winding an aluminum foil composite glass fiber cloth composed of a glass fiber cotton with a thickness of 1mm and a bright and clean aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton.
In this embodiment, as shown in fig. 2, the inner container 2, the heat insulating interlayer 4 and the outer shell 1 are coaxial, and the thickness ratio a of the thickness a of the inner container 2, the total thickness B of the heat insulating interlayer 4 and the vacuum interlayer 5, and the thickness C of the outer shell 1 is: b: c = (0.6-0.8): (15-18): 1. the thickness ratios of the thickness B1 of the low-density heat-insulating interlayer 41, the thickness B2 of the medium-density heat-insulating interlayer 42, the thickness B3 of the high-density heat-insulating interlayer 43, and the thickness B4 of the vacuum interlayer 5 are B1: b2: b3: b4= 4: 3: 2: 1.
to further reduce the heat radiation, the present embodiment is coated with a smooth aluminum foil layer having a thickness of 0.5mm on the inner wall of the outer case 1. To further reduce thermal convection, the vacuum degree of the vacuum interlayer 5 is maintained at (2.0 + -0.2) x10 in this embodiment-3Pa。
The low temperature area close to the inner container 2 reduces heat conduction by increasing the thickness of the glass fiber cotton, and the high temperature area close to the outer shell 1 reduces heat convection and heat radiation by vacuumizing and utilizing the reflection action of a smooth aluminum foil layer so as to improve the insulation efficiency and reduce the total thickness of the heat insulation interlayer 4 and the vacuum interlayer 5.
In this embodiment, the vacuum interlayer 5 is filled with a second composite hydrogen getter for absorbing hydrogen leakage and impurity gases released from the heat insulating interlayer 4, so as to prolong the service life of the vacuum interlayer 5. The second composite hydrogen absorbing agent filled in the vacuum interlayer 5 is a mixture of copper oxide, a molecular sieve and palladium oxide; the weight ratio of copper oxide to molecular sieve to palladium oxide is 1: (8-10): (2-4); the granularity of the second composite hydrogen absorbent is 15-20 microns.
In order to avoid the loss of the second composite hydrogen absorbent, the embodiment is provided with a filtering device on the vacuumizing port of the outer shell 1, and the filtering precision of the filtering device is not more than 15 microns.
The structure is provided with the low-density heat insulation interlayer 41, the medium-density heat insulation interlayer 42, the high-density heat insulation interlayer 43 and the vacuum interlayer 5 according to the temperature change from the low-temperature area to the high-temperature area between the inner container 2 and the outer shell 1, so that the overall heat insulation efficiency of the low-temperature vehicle-mounted liquid hydrogen bottle is improved by 30% or more; in addition, the aluminum foil composite glass fiber cloth consisting of the glass fiber cotton and the bright and clean aluminum foil superposed on the glass fiber cotton can realize uniform winding and realize batch production.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are also within the scope of the present invention.

Claims (10)

1. On-vehicle liquid hydrogen bottle of low temperature includes: the inner container consists of an inner container front end socket, an inner container barrel and an inner container rear end socket, and the outer container consists of an outer container front end socket, an outer container barrel and an outer container rear end socket; the inner container front end socket is fixedly connected with the shell front end socket through the header and the front support neck pipe, and the inner container rear end socket is fixedly connected with the shell rear end socket through the rear support shaft, so that the inner container is suspended and supported in the cavity of the shell body; a buffer cavity with a cavity is fixedly arranged on the inner wall of the inner container rear end socket; the method is characterized in that: a heat insulation interlayer is wound on the outer wall of the inner container, and a vacuum interlayer is formed between the heat insulation interlayer and the outer shell; a dehydrogenation cavity of a front support neck pipe of a sealing cover is fixedly arranged on the inner wall of the front end socket of the inner container, the hydrogen delivery pipeline group hermetically penetrates through the header, the front support neck pipe and the corresponding through holes on the dehydrogenation cavity wall and then extends into the inner container, and a first composite hydrogen absorbent for absorbing leaked hydrogen is filled in the dehydrogenation cavity; a plurality of wave-proof plates are uniformly and fixedly arranged in the liner barrel body at intervals along the axial direction of the liner, each wave-proof plate is obliquely inclined backwards, and the axial inclination angle alpha between each wave-proof plate and the axis of the liner is 70-80 degrees; the wave-proof plate is a wave-shaped bent plate structure formed by repeatedly bending the left end to the right end back and forth, a plurality of horizontal groove-shaped through holes are formed in the wave-proof plate, and the horizontal groove-shaped through holes are uniformly distributed at intervals from top to bottom.
2. The cryogenic vehicle-mounted liquid hydrogen bottle according to claim 1, characterized in that: the distance L between every two adjacent wave-proof plates is 300-350 mm.
3. The cryogenic vehicle-mounted liquid hydrogen bottle according to claim 1, characterized in that: the heat-insulating interlayer is formed by winding a low-density heat-insulating interlayer, a medium-density heat-insulating interlayer and a high-density heat-insulating interlayer from inside to outside in sequence, wherein the low-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 3mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, the medium-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 2mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, and the high-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 1mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton.
4. The cryogenic vehicle-mounted liquid hydrogen bottle according to claim 3, characterized in that: the vacuum degree of the vacuum interlayer is (2.0 +/-0.2) x10-3Pa; and a smooth aluminum foil layer with the thickness of 0.5mm is coated on the inner wall of the outer shell.
5. The cryogenic vehicle-mounted liquid hydrogen bottle according to claim 3, characterized in that: the coaxial line of inner bag, adiabatic intermediate layer and shell body, and the thickness ratio A of the thickness A of inner bag, the total thickness B of adiabatic intermediate layer and vacuum intermediate layer, the thickness C three of shell body: b: c = (0.6-0.8): (15-18): 1.
6. the cryogenic vehicle-mounted liquid hydrogen bottle according to claim 3, 4 or 5, characterized in that: the thickness ratio of the thickness of the low-density heat-insulating interlayer B1 to the thickness of the medium-density heat-insulating interlayer B2 to the thickness of the high-density heat-insulating interlayer B3 to the thickness of the vacuum interlayer B4 is B1: b2: b3: b4= 4: 3: 2: 1.
7. the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1 or 3, characterized in that: the vacuum interlayer is filled with a second composite hydrogen absorbing agent for absorbing the leaked hydrogen and the impurity gas released by the heat insulation interlayer.
8. The cryogenic vehicle-mounted liquid hydrogen bottle according to claim 7, characterized in that: the first composite hydrogen absorbing agent filled in the dehydrogenation cavity and the second composite hydrogen absorbing agent filled in the vacuum interlayer are a mixture formed by mixing copper oxide, a molecular sieve and palladium oxide; the weight ratio of copper oxide to molecular sieve to palladium oxide is 1: (8-10): (2-4).
9. The cryogenic vehicle-mounted liquid hydrogen bottle according to claim 8, characterized in that: the granularity of the second composite hydrogen absorbing agent filled in the vacuum interlayer is 15-20 microns.
10. The cryogenic vehicle-mounted liquid hydrogen bottle according to claim 9, characterized in that: and a filtering device is arranged on the vacuumizing port of the outer shell, and the filtering precision of the filtering device is not more than 15 micrometers.
CN202022864944.7U 2020-12-03 2020-12-03 Low-temperature vehicle-mounted liquid hydrogen bottle Active CN213930385U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022117013A1 (en) * 2020-12-03 2022-06-09 江苏国富氢能技术装备股份有限公司 Low-temperature vehicle-mounted liquid hydrogen cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022117013A1 (en) * 2020-12-03 2022-06-09 江苏国富氢能技术装备股份有限公司 Low-temperature vehicle-mounted liquid hydrogen cylinder

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