WO2022117013A1

WO2022117013A1 - Low-temperature vehicle-mounted liquid hydrogen cylinder

Info

Publication number: WO2022117013A1
Application number: PCT/CN2021/134908
Authority: WO
Inventors: 邱芳; 王朝; 王杰; 何春辉; 许春华
Original assignee: 江苏国富氢能技术装备股份有限公司; 张家港氢云新能源研究院有限公司
Priority date: 2020-12-03
Filing date: 2021-12-02
Publication date: 2022-06-09
Also published as: CN112361205A

Abstract

A low-temperature vehicle-mounted liquid hydrogen cylinder, comprising an inner container (2) and an outer shell (1), wherein an inner container front closure head (21) is fixedly connected to an outer shell front closure head (11) by means of a header holder (31) and a front support neck tube (32); an inner container rear closure head (23) is fixedly connected to an outer shell rear closure head (13) by means of a rear support shaft (33); a heat insulation interlayer (4) is wound around an outer wall of the inner container; a vacuum interlayer (5) is formed between the heat insulation interlayer (4) and the outer shell (1); a hydrogen removal chamber (34) is fixedly arranged in an inner wall of the inner container front closure head (21); a hydrogen conveying pipeline group (35) penetrates, in a sealed manner, the header holder (31), the front support neck tube (32) and a corresponding through hole in a wall of the hydrogen removal chamber and then extends into the inner container (2); the hydrogen removal chamber (34) is filled with a first composite hydrogen absorbent; a buffer chamber (36) is fixedly arranged on an inner wall of the inner container rear closure head (23); and several wave-proof plates (6) each having a corrugated bent plate structure and having horizontal slotted through holes (61) are uniformly and fixedly arranged in an inner container cylinder (22) at intervals in an axial direction of the inner container, with an axial inclination angle α between each wave-proof plate (6) and the axis of the inner container being 70°-80°. Same is simple in terms of structure, has good heat insulation and cold insulation effects, and the fluctuation and impact of liquid in the cylinder can be reduced.

Description

A low-temperature vehicle-mounted liquid hydrogen bottle

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202011396424.6 and the title "A Low-Temperature Vehicle-mounted Liquid Hydrogen Cylinder" filed with the State Intellectual Property Office of China on December 03, 2020, the entire contents of which are incorporated herein by reference middle.

technical field

The present application relates to vehicle-mounted hydrogen storage equipment, in particular to a low-temperature vehicle-mounted liquid hydrogen bottle.

Background technique

With the increasingly prominent problem of the global greenhouse effect and the encouragement of countries for the development and utilization of hydrogen energy, more and more hydrogen fuel cell vehicles have been put into the market. Compared with fuel vehicles or electric vehicles, hydrogen fuel cell vehicles use the on-board hydrogen storage system as the power source and hydrogen as the fuel source of the fuel cell stack. Therefore, the development of on-board hydrogen storage technology directly affects the cruising range, cost and cost of fuel cell vehicles. safety.

At present, my country's vehicle-mounted hydrogen storage system uses high-pressure gas cylinders as hydrogen storage containers to store 35MPa and 70MPa high-pressure hydrogen. However, due to the limitation of the physical properties of hydrogen, the maximum volumetric hydrogen storage density of the high-pressure hydrogen storage bottle is only 25g/L, which is far from the “mass hydrogen storage density of 7.5% and volume energy density of 70g/L set by the US Department of Energy. The cruising range after hydrogen exceeds 500km” the research and development goal of on-board hydrogen storage technology.

Like LNG, in order to improve the hydrogen storage density of vehicle-mounted hydrogen storage systems, my country is currently actively developing hydrogen liquefaction and liquid hydrogen storage, transportation and filling technologies. The cryogenic liquid hydrogen storage is to compress the hydrogen and then cool it to below -252℃, liquefy it and store it in an adiabatic vacuum container. Compared with high-pressure gaseous hydrogen storage, the hydrogen storage quality and volumetric hydrogen storage energy density of low-temperature liquid hydrogen storage are greatly improved. However, since the boiling point of liquid hydrogen is very low (-253°C), the latent heat of vaporization is small (0.45kJ/g), and the gas-liquid ratio is large (845 times), how to achieve ultra-low temperature liquid hydrogen storage and avoid and reduce evaporation loss is a vehicle-mounted liquid hydrogen The core problem of hydrogen storage technology.

SUMMARY OF THE INVENTION

The present application provides a low-temperature vehicle-mounted liquid hydrogen bottle with simple structure, convenient manufacture, good thermal insulation and cooling effect, and mass production. The design of multiple anti-wave boards in the low-temperature vehicle-mounted liquid hydrogen bottle can effectively reduce the fluctuation and impact of the liquid in the bottle.

In some embodiments of the present application, the low-temperature vehicle-mounted liquid hydrogen bottle may include: an inner bladder and an outer casing, and the inner bladder is composed of a front head of the inner bladder, a cylinder body of the inner bladder and a rear head of the inner bladder, The outer shell is composed of the outer shell front head, the outer shell cylinder and the outer shell rear head; the inner tank front head is fixedly connected with the outer shell front head through the header seat and the front support neck pipe, and the inner tank rear head is connected to the outer shell through the rear support shaft. The rear cover of the outer shell is fixedly connected, so that the inner tank is suspended and supported in the cavity of the outer shell; the inner wall of the rear cover of the inner tank is fixedly provided with a buffer cavity with a cavity; A vacuum interlayer is formed between the thermal insulation interlayer and the outer shell; a dehydrogenation chamber that seals the front support neck tube of the cover is fixedly arranged on the inner wall of the front head of the inner tank, and the hydrogen transport pipeline group is sealed through the header seat and the front support neck. The corresponding through holes on the wall of the tube and the dehydrogenation cavity extend into the inner bladder, and the dehydrogenation chamber is filled with the first composite hydrogen absorbing agent for absorbing leaked hydrogen; A number of wave-proof boards are fixed at intervals, and each wave-proof board is inclined backward, and the axial inclination angle α between each wave-proof board and the axis of the inner tank is 70°-80°; the wave-proof board is from the left end to the right end. In the wave-shaped bending plate structure formed by repeatedly bending back and forth, a number of horizontal slot-shaped through holes are opened on the wave-proof plate, and each horizontal slot-shaped through hole is evenly spaced from top to bottom.

Optionally, the buffer cavity may be provided with a small hole communicating with the inner cavity of the buffer cavity, and the buffer cavity may be configured to adjust the pressure in the vehicle-mounted liquid hydrogen bottle.

Optionally, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, the distance L between two adjacent wave-proof boards may be 300-350 mm.

Optionally, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, the insulating interlayer can be composed of a low-density insulating interlayer, a medium-density insulating interlayer and a high-density insulating interlayer from the inside out, and the low-density insulating interlayer can be: The aluminum foil composite glass fiber cloth composed of glass fiber wool with a thickness of 3mm and a smooth aluminum foil with a thickness of 0.5mm superimposed on the glass fiber wool is wound. The high-density insulating interlayer can be made of glass fiber wool with a thickness of 1mm and a thickness of 0.5mm superimposed on the glass fiber wool. The smooth aluminum foil is composed of aluminum foil composite glass fiber cloth wound.

Optionally, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, the vacuum degree of the vacuum interlayer can be (2.0±0.2)×10 ^-3 Pa; the inner wall of the outer casing is coated with a smooth aluminum foil layer with a thickness of 0.5mm .

Optionally, the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, wherein the inner tank, the thermal insulation interlayer and the outer shell can be coaxial, and the thickness A of the inner tank, the overall thickness B of the thermal insulation interlayer and the vacuum interlayer, and the thickness C of the outer shell. The thickness ratio of the three A: B: C = (0.6 ~ 0.8): (15 ~ 18): 1; the thickness of the low density thermal insulation interlayer B1, the thickness of the medium density thermal insulation interlayer B2, the thickness of the high density thermal insulation interlayer B3, the vacuum interlayer The thickness of B4 is the thickness ratio of B1:B2:B3:B4=4:3:2:1.

Optionally, in the aforementioned low temperature vehicle-mounted liquid hydrogen bottle, the vacuum interlayer can be filled with a second composite hydrogen absorbing agent for absorbing hydrogen leakage and impurity gas released by the adiabatic interlayer.

Optionally, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, the first composite hydrogen absorbing agent filled in the dehydrogenation chamber and the second composite hydrogen absorbing agent filled in the vacuum interlayer can be made of copper oxide, molecular sieve, etc. and palladium oxide mixed mixture; the weight ratio of copper oxide, molecular sieve and palladium oxide is 1:(8-10):(2-4).

Optionally, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, the particle size of the second composite hydrogen absorbing agent filled in the vacuum interlayer can be 15 microns to 20 microns; a filter device is installed on the vacuum port of the outer casing. , the filtration precision of the filter device may not exceed 15 microns.

Optionally, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, each corresponding aluminum foil composite glass fiber cloth that is wound to form a low-density thermal insulation interlayer, a medium-density thermal insulation interlayer, and a high-density thermal insulation interlayer may need to be pretreated before winding: Arrange the corresponding aluminum foil composite glass fibers in a constant temperature furnace at (120±5°C) and preheat for 8-10 hours.

Optionally, in the aforementioned low-temperature vehicle-mounted liquid hydrogen bottle, the operating ambient temperature of each corresponding aluminum foil composite glass fiber cloth that is wound to form a low-density thermal insulation interlayer, a medium-density thermal insulation interlayer and a high-density thermal insulation interlayer during the winding process can be It is 16～20℃, and the humidity is less than 18%.

The beneficial effects of the present application at least include: 1. The first composite hydrogen absorbing agent filled in the dehydrogenation chamber and the second composite hydrogen absorbing agent filled in the vacuum interlayer can absorb hydrogen leakage and impurity gas released from the insulating interlayer, effectively ensuring that Vacuum interlayer leak rate and vacuum degree requirements; ② The design of multiple anti-wave boards can effectively reduce the fluctuation and impact of the liquid in the bottle, and improve the service life of the low-temperature vehicle-mounted liquid hydrogen bottle; ③ According to the direction from the low temperature zone to the outer shell, the The temperature changes in the high-temperature area, low-density thermal insulation interlayer, medium-density thermal insulation interlayer, high-density thermal insulation interlayer and vacuum interlayer are arranged, so as to improve the overall thermal insulation efficiency of the low-temperature vehicle-mounted liquid hydrogen bottle by 30% or more; in addition, the use of glass fiber cotton and The aluminum foil composite glass fiber cloth composed of smooth aluminum foil superimposed on the glass fiber cotton can realize uniform winding and realize mass production.

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of a low-temperature vehicle-mounted liquid hydrogen bottle described in the present application.

2 is a schematic diagram of the internal structure of a low-temperature vehicle-mounted liquid hydrogen bottle described in the present application.

Figure 3 is a schematic structural diagram of a wave breaker.

FIG. 4 is a schematic diagram of a partial internal structure between the inner tank and the outer casing.

FIG. 5 is a partial enlarged schematic view of the structure of FIG. 2 .

Detailed ways

The technical solutions described in the present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments.

Example 1

As shown in FIG. 1, FIG. 2 and FIG. 5, a low-temperature vehicle-mounted liquid hydrogen bottle described in this embodiment may include: an inner tank 2 and an outer shell 1, and the inner tank 2 is composed of a front sealing head 21 of the inner tank, an inner tank 2, and an inner tank 2. The tank body 22 and the inner tank rear head 23 constitute a bottle structure, and the outer shell 1 consists of the outer shell front head 11 , the outer shell cylinder 12 and the outer shell rear head 13 to constitute the bottle structure. The front head 21 of the inner tank is sealed and fixedly connected to the front head 11 of the outer casing through the header seat 31 and the front support neck tube 32, and the rear head 23 of the inner tank is fixedly connected to the rear head 13 of the outer casing through the rear support shaft 33, so that the inner head 13 is fixedly connected. The bladder 2 is suspended and supported in the cavity of the outer casing 1 . A heat insulating interlayer 4 is wound on the outer wall of the inner tank, and a vacuum interlayer 5 is formed between the heat insulating interlayer 4 and the outer shell 1 . A dehydrogenation chamber 34 for sealing the front support neck tube 32 of the cover is fixedly arranged on the inner wall of the front head 21 of the inner bladder, and the hydrogen transfer pipeline group 35 is sealed through the header seat 31, the front support neck tube 32 and the dehydrogenation chamber. The corresponding through holes on the wall extend into the inner tank 2, and the dehydrogenation chamber 34 is filled with the first composite hydrogen absorbing agent, which is used to absorb the welding seam of the hydrogen transmission pipeline group located in the header seat 31 and the dehydrogenation chamber 34. Trace hydrogen leakage at fittings. The first composite hydrogen absorbing agent filled in the dehydrogenation chamber 34 is a mixture of copper oxide, molecular sieve, and palladium oxide; the weight ratio of copper oxide, molecular sieve, and palladium oxide is 1: (8-10): (2 to 4).

A buffer cavity 36 with a cavity is fixedly arranged on the inner wall of the rear head 23 of the inner liner, and a small hole communicated with the inner cavity of the buffer cavity 36 is opened on the buffer cavity 36. The buffer cavity 36 is provided for gas phase space buffering, Adjust the pressure in the vehicle-mounted liquid hydrogen bottle to prevent overcharging.

As shown in FIGS. 2 and 3 , a plurality of anti-wave boards 6 are fixedly arranged in the inner tank body 22 at uniform intervals along the axial direction of the inner tank. The axial inclination angle α between the axes of the gallbladder is 70°˜80°, and the distance L between two adjacent wave boards 6 is 300˜350 mm. The wave-proof board 6 is a wave-shaped bending plate structure formed by repeatedly bending the left end to the right end. Evenly spaced distribution. The design of multiple wave-proof boards 6 can effectively reduce the fluctuation and impact of the liquid in the bottle.

Embodiment 2

In this embodiment, the heat insulating interlayer 4 is optionally designed on the basis of the first embodiment.

In the low temperature vessel with the insulating interlayer 4, when the temperature is relatively high or in the high temperature section of the insulating interlayer, the heat radiation accounts for more than 80% of the total heat transfer, and the corresponding solid heat conduction, gas heat conduction and gas convection heat transfer can be ignored. However, when the temperature is relatively low or on the side of the insulating interlayer close to the cryogenic liquid, the proportion of heat conduction increases significantly. This feature shows that a reasonable combination of multi-layer insulating materials and spacer materials can optimize the overall thermal insulation performance of the cryogenic container. .

As shown in FIG. 2 and FIG. 4 , in this embodiment, the insulating interlayer 4 can be composed of a low-density insulating interlayer 41 , a medium-density insulating interlayer 42 and a high-density insulating interlayer 43 in turn from the inside to the outside. 41 can be made of glass fiber wool with a thickness of 3mm and an aluminum foil composite glass fiber cloth composed of a smooth aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton. The fiber cotton and the aluminum foil composite glass fiber cloth composed of the smooth aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton are wound. It is made of aluminum foil composite glass fiber cloth composed of smooth aluminum foil with a thickness of 0.5mm.

In this embodiment, as shown in FIG. 2 , the inner tank 2 , the thermal insulation interlayer 4 and the outer shell 1 may be coaxial, and the thickness A of the inner tank 2 , the overall thickness B of the thermal insulation interlayer 4 and the vacuum interlayer 5 , and the thickness of the outer shell 1 The thickness ratio of the three thicknesses C: A:B:C=(0.6-0.8):(15-18):1. Thickness ratio B1: B2: B3: B4 = 4: 3: 2 :1.

In order to further reduce heat radiation, in this embodiment, a smooth aluminum foil layer with a thickness of 0.5 mm is coated on the inner wall of the outer casing 1 . In order to further reduce thermal convection, the vacuum degree of the vacuum interlayer 5 is maintained at (2.0±0.2)×10 ⁻³ Pa in this embodiment.

The low temperature area near the inner tank 2 reduces heat conduction by increasing the thickness of the glass fiber wool, and the high temperature area near the outer shell 1 reduces heat convection and heat radiation by vacuuming and using the reflection effect of the smooth aluminum foil layer to improve the insulation efficiency and reduce the thermal insulation interlayer 4 and the total thickness of the vacuum interlayer 5.

In this embodiment, the vacuum interlayer 5 is filled with a second composite hydrogen absorbing agent for absorbing hydrogen leakage and impurity gas released by the 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, molecular sieve and palladium oxide; the weight ratio of copper oxide, molecular sieve and palladium oxide is 1:(8～10):( 2-4); the particle size of the second composite hydrogen absorbing agent is 15-20 microns. In order to avoid the loss of the second composite hydrogen absorbing agent, in this embodiment, a filter device is installed on the vacuuming port of the outer casing 1, and the filter precision of the filter device does not exceed 15 microns.

In this embodiment, each corresponding aluminum foil composite glass fiber cloth that is wound to form the low-density thermal insulation interlayer 41, the medium-density thermal insulation layer 42 and the high-density thermal insulation interlayer 43 needs to be pretreated before winding: arrange the corresponding aluminum foil composite glass fibers on the (120±5℃) preheated in a constant temperature furnace for 8-10 hours to release the air, water vapor, formaldehyde and other impurity gases adsorbed in the thermal insulation material, so as to prolong the service life of the thermal insulation interlayer 5. In addition, the operating environment temperature of each corresponding aluminum foil composite glass fiber cloth wound to form the low-density thermal insulation interlayer 41, the medium-density thermal insulation interlayer 42 and the high-density thermal insulation interlayer 43 during the winding process is 16-20 ° C, and the humidity is less than 18%.

According to the above structure, according to the temperature change from the low temperature region to the high temperature region from the inner tank 2 to the outer shell 1, the low-density thermal insulation interlayer 41, the medium-density thermal insulation interlayer 42, the high-density thermal insulation interlayer 43 and the vacuum interlayer 5 are arranged, so as to make the low-temperature vehicle-mounted The overall thermal insulation efficiency of the liquid hydrogen bottle is increased by 30% or more; in addition, the use of aluminum foil composite glass fiber cloth composed of glass fiber cotton and smooth aluminum foil superimposed on the glass fiber cotton can achieve uniform winding and mass production.

The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application in any other form, and any modifications or equivalent changes made based on the technical essence of the present application still fall within the scope of protection claimed in the present application.

Industrial Applicability

The application provides a low-temperature vehicle-mounted liquid hydrogen bottle, comprising: an inner bladder and an outer casing, the front head of the inner bladder is fixedly connected to the front head of the outer casing through a header seat and a front support neck tube, and the rear head of the inner bladder is supported by the rear support The shaft is fixedly connected with the rear head of the outer casing, an insulating interlayer is wound on the outer wall of the inner tank, and a vacuum interlayer is formed between the insulating interlayer and the outer casing; a dehydrogenation chamber is fixed on the inner wall of the front head of the inner tank, and the hydrogen transmission pipeline The group seal passes through the header seat, the front support neck tube, and the corresponding through hole on the wall of the dehydrogenation chamber, and then extends into the inner tank, and the dehydrogenation chamber is filled with the first composite hydrogen absorbing agent; the inner wall of the rear head of the inner tank A buffer cavity is fixedly arranged on the upper part; in the inner tank body, a number of wave-shaped bending plate structures with horizontal groove-shaped through holes are fixedly arranged at uniform intervals along the axial direction of the inner tank. The axial inclination angle α between them is 70° to 80°. The above-mentioned structure is simple, the heat insulation and cold preservation effect is good, and the fluctuation and impact of the liquid in the bottle can be reduced.

Furthermore, it is understood that a cryogenic vehicle-mounted liquid hydrogen bottle of the present application is reproducible and can be used in a variety of industrial applications. For example, a low-temperature vehicle-mounted liquid hydrogen bottle of the present application can be used for a vehicle-mounted hydrogen storage device.

Claims

A low-temperature vehicle-mounted liquid hydrogen bottle, comprising: an inner liner and an outer shell, the inner liner is composed of the inner liner front head, the inner liner cylinder and the inner liner rear head, and the outer shell is composed of the outer shell front head, the outer shell and the outer shell The rear head is formed; the front head of the inner tank is fixedly connected to the front head of the shell through the header seat and the front support neck tube, and the rear head of the inner tank is fixedly connected to the rear head of the outer shell through the rear support shaft, so that the inner tank is suspended and supported. It is located in the cavity of the outer shell; a buffer cavity with a cavity is fixedly arranged on the inner wall of the rear head of the inner tank; it is characterized in that: a thermal insulation interlayer is wound on the outer wall of the inner tank, and a vacuum is formed between the thermal insulation interlayer and the outer shell Interlayer; on the inner wall of the front head of the liner, a dehydrogenation chamber with a sealing cover and a front support neck tube is fixedly arranged, and the hydrogen transmission pipeline group is sealed through the header seat, the front support neck tube, and the corresponding communication channel on the wall of the dehydrogenation chamber. The hole extends into the inner tank, and the dehydrogenation chamber is filled with the first composite hydrogen absorbing agent for absorbing hydrogen leakage; in the inner tank cylinder, a number of anti-wave plates are fixedly arranged at uniform intervals along the inner tank axis, each The wave-proof boards are all inclined backward, and the axial inclination angle α between each wave-proof board and the axis of the inner tank is 70°-80°; the wave-proof board is a wave-shaped fold formed by repeatedly bending the left end to the right end. In the bent plate structure, a number of horizontal groove-shaped through holes are opened on the wave-proof plate, and the horizontal groove-shaped through holes are evenly spaced from top to bottom.
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1, characterized in that: the buffer cavity is provided with a small hole communicating with the inner cavity of the buffer cavity, and the buffer cavity is configured to adjust the pressure in the vehicle-mounted liquid hydrogen bottle .
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1 or 2, wherein the distance L between two adjacent wave-proof boards is 300-350 mm.
A low-temperature vehicle-mounted liquid hydrogen bottle according to any one of claims 1 to 3, wherein the insulating interlayer is composed of a low-density insulating interlayer, a medium-density insulating interlayer and a high-density insulating interlayer sequentially from inside to outside. The low-density insulating interlayer is composed of glass fiber wool with a thickness of 3mm and an aluminum foil composite glass fiber cloth composed of a smooth aluminum foil with a thickness of 0.5mm superimposed on the glass fiber wool. The glass fiber wool and the aluminum foil composite glass fiber cloth composed of 0.5mm thick smooth aluminum foil superimposed on the glass fiber wool are wound. It is made of aluminum foil composite glass fiber cloth composed of smooth aluminum foil with a thickness of 0.5mm.
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 4, characterized in that: the vacuum degree of the vacuum interlayer is (2.0±0.2)×10 -3 Pa; Aluminum foil layer.
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 4 or 5, characterized in that: the inner tank, the thermal insulation interlayer and the outer shell are coaxial, and the thickness A of the inner tank, the overall thickness B of the thermal insulation interlayer and the vacuum interlayer, and the outer shell The thickness of the body C The thickness ratio of the three A: B: C = (0.6 ~ 0.8): (15 ~ 18): 1; B3, the thickness of the vacuum interlayer B4 The thickness ratio of the four is B1:B2:B3:B4=4:3:2:1.
A low-temperature vehicle-mounted liquid hydrogen bottle according to any one of claims 1 to 4, characterized in that: the vacuum interlayer is filled with the second composite hydrogen absorbing agent for absorbing hydrogen leakage and impurity gas released by the insulating interlayer .
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 7, wherein the first composite hydrogen absorbing agent filled in the dehydrogenation chamber and the second composite hydrogen absorbing agent filled in the vacuum interlayer are made of copper oxide , a mixture of molecular sieve and palladium oxide; the weight ratio of copper oxide, molecular sieve and palladium oxide is 1:(8-10):(2-4).
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 7 or 8, characterized in that: the particle size of the second composite hydrogen absorbing agent filled in the vacuum interlayer is 15 microns to 20 microns; A filter device is installed, and the filter accuracy of the filter device does not exceed 15 microns.
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 4, wherein the aluminum foil composite glass fiber cloth corresponding to each of the low-density thermal insulation interlayers, the medium-density thermal insulation interlayers and the high-density thermal insulation interlayers formed by winding must be pre-treated before winding. Treatment: Arrange the corresponding aluminum foil composite glass fibers in a constant temperature furnace (120±5°C) to preheat for 8-10 hours.
A low-temperature vehicle-mounted liquid hydrogen bottle according to claim 4 or 10, characterized in that: each corresponding aluminum foil composite glass fiber cloth formed by winding to form a low-density thermal insulation interlayer, a medium-density thermal insulation interlayer and a high-density thermal insulation interlayer is in the process of winding. The operating environment temperature is 16 ~ 20 ℃, and the humidity is less than 18%.