Hydrogen storage device with double-layer inner and outer container pressure difference structure

Abstract

The utility model belongs to the technical field of hydrogen storage, and provides a hydrogen storage device with a double-layer inner and outer container pressure difference structure, which comprises a hydrogen storage tank inner container, an inner valve, an outer valve and a hydrogen storage tank outer container, the hydrogen storage tank inner container is installed inside the hydrogen storage tank outer container, a hydrogen port channel extending to the outside of the hydrogen storage tank outer container is communicated between the hydrogen storage tank inner container and the hydrogen storage tank outer container, the internal valve is communicated with the hydrogen storage tank inner container and the hydrogen storage tank outer container, and the external valve is communicated with the hydrogen storage tank inner container. The hydrogen storage device has the advantages that the inner container and the outer container which are of a double-layer structure are used for storing hydrogen, and due to the fact that the inner container and the outer container have pressure difference, under the condition that III-type hydrogen storage bottles of the same specification are the same in size, the storage capacity of the hydrogen storage bottles can be improved, and the whole storage device is good in structural safety and stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen storage and relates to a hydrogen storage device with a double-layer inner and outer tank pressure difference structure. Background Art

[0002] Hydrogen energy is one of the most promising energy industries today. Its high calorific value, high energy density, and low carbon emissions make hydrogen an environmentally friendly, high-value energy source. The development and use of hydrogen energy is an important emission reduction direction for achieving China's 2060 carbon neutrality goal. As one of the core components of hydrogen energy vehicle power systems, the hydrogen storage bottle market continues to grow with the vigorous development of the hydrogen energy vehicle industry, and has a strong future development prospect. How to safely and efficiently store high-pressure hydrogen is one of the current research and development focuses. Compared with the type IV bottles in Europe and the United States, which have been mass-produced and have entered the market, the development of domestically produced type IV bottles has many pain points, such as late development, weak infrastructure, and foreign technology blockade. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hydrogen storage device with a double-layer inner and outer tank pressure difference structure, which can improve the storage capacity of the hydrogen storage bottle and ensure safety, in view of the current status of the existing technology.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a double-layer inner and outer tank pressure difference structure hydrogen storage device, characterized in that it comprises a hydrogen storage tank inner tank, an internal valve, an external valve and a hydrogen storage tank outer tank; the hydrogen storage tank inner tank is installed inside the hydrogen storage tank outer tank, the hydrogen storage tank inner tank and the hydrogen storage tank outer tank are connected by a hydrogen port channel extending to the outside of the hydrogen storage tank outer tank, the internal valve connects the hydrogen storage tank inner tank and the hydrogen storage tank outer tank, and the external valve connects the hydrogen storage tank inner tank.

[0005] In the above-mentioned double-layer inner and outer tank pressure difference structure hydrogen storage device, two pressure sensors are respectively installed on the inner side of the hydrogen storage tank inner tank and the inner side of the hydrogen storage tank outer tank.

[0006] In the above-mentioned double-layer inner and outer tank pressure difference structure hydrogen storage device, there are upper support columns, lower support columns, front support columns and rear support columns between the hydrogen storage tank inner tank and the hydrogen storage tank outer tank, and the hydrogen storage tank inner tank is installed inside the hydrogen storage tank outer tank through the upper support column, lower support column, front support column and rear support column.

[0007] In the above-mentioned double-layer inner and outer tank pressure difference structure hydrogen storage device, the load of the inner tank of the hydrogen storage tank is 70MPa, and the load of the outer tank of the hydrogen storage tank is 35MPa.

[0008] In the above-mentioned double-layer inner and outer tank pressure difference structure hydrogen storage device, the external valve is used to inflate and deflate the inner tank of the hydrogen storage tank.

[0009] In the above-mentioned double-layer inner and outer tank pressure difference structure hydrogen storage device, the internal valve is used to inflate and deflate the inner tank of the hydrogen storage tank.

[0010] Compared with the prior art, the advantage of the utility model is that it utilizes a double-layer inner and outer liner to store hydrogen, and because of the pressure difference between the inner and outer liner, the storage capacity of the hydrogen storage bottle can be increased while maintaining the same size of the same specification Type III hydrogen storage bottle, and the entire storage device has good structural safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of the double-layer inner and outer tank pressure difference structure hydrogen storage device;

[0012] Figure 2 This is a schematic diagram of the structure of the double-layer inner and outer tank pressure difference structure hydrogen storage device in another direction. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present invention, it is necessary to understand that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0015] In the figure, there is an inner liner 100 of a hydrogen storage tank, an inner valve 200, an outer valve 300, an outer liner 400 of a hydrogen storage tank, an upper support column 500, a lower support column 600, a front support column 700, a rear support column 800, and a hydrogen inlet 900.

[0016] like Figure 1As shown, the double-layer inner and outer tank pressure difference structure hydrogen storage device comprises a hydrogen storage tank inner tank 100, an internal valve 200, an external valve 300 and a hydrogen storage tank outer tank 400, wherein the hydrogen storage tank inner tank 100 and the hydrogen storage tank outer tank 400 are cylindrical as a whole, and the hydrogen storage tank inner tank 100 is installed inside the hydrogen storage tank outer tank 400. In order to ensure the stability and reliability of the hydrogen storage tank inner tank 100 after installation, an upper support column 500, a lower support column 600, a front support column 700 and a rear support column 800 are provided between the hydrogen storage tank inner tank 100 and the hydrogen storage tank outer tank 400, and the hydrogen storage tank inner tank 100 is installed inside the hydrogen storage tank outer tank 400 through the upper support column 500, the lower support column 600, the front support column 700 and the rear support column 800, so that the upper support column 500, the lower support column 600, the front support column 700 and the rear support column 800 fix the hydrogen storage tank inner tank 100 through four corners.

[0017] like Figure 2 As shown, in order to increase the storage capacity of the hydrogen storage bottle, the hydrogen storage tank liner 100 and the hydrogen storage tank outer liner 400 are connected by a hydrogen port channel extending to the outside of the hydrogen storage tank outer liner 400, and the hydrogen port channel has a hydrogen inlet 900 at its outlet, the internal valve 200 connects the hydrogen storage tank liner 100 and the hydrogen storage tank outer liner 400, and the external valve 300 connects the hydrogen storage tank liner 100, the external valve 300 is used to inflate and deflate the hydrogen storage tank liner 100, and the internal valve 200 is used to inflate and deflate the hydrogen storage tank liner 100. The actual load of the hydrogen storage tank liner 100 is 70MPa, and the load of the hydrogen storage tank outer liner 400 is 35 MPa. Here, since there is a pressure difference between the hydrogen storage tank inner liner 100 and the hydrogen storage tank outer liner 400, the storage capacity of the hydrogen storage bottle can be increased. In order to facilitate pressure monitoring, two pressure sensors are installed on the inner sides of the hydrogen storage tank inner liner 100 and the hydrogen storage tank outer liner 400. When storing hydrogen, first open the external valve 300, and inflate the hydrogen storage tank outer liner 400 through the hydrogen inlet 900. When the hydrogen storage tank inner liner 100 and the hydrogen storage tank outer liner 400 are inflated to 35MPa, continue to inflate the hydrogen storage tank inner liner 100 to 70MPa, thereby increasing the storage capacity of the hydrogen storage bottle and improving the overall safety.

[0018] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A double-layer inner and outer tank pressure difference structure hydrogen storage device, characterized in that: It includes a hydrogen storage tank inner liner, an internal valve, an external valve and a hydrogen storage tank outer liner; the hydrogen storage tank inner liner is installed inside the hydrogen storage tank outer liner, the hydrogen storage tank inner liner and the hydrogen storage tank outer liner are connected by a hydrogen port channel extending to the outside of the hydrogen storage tank outer liner, the internal valve connects the hydrogen storage tank inner liner and the hydrogen storage tank outer liner, and the external valve connects the hydrogen storage tank inner liner.

2. A double-layer inner and outer tank pressure difference structure hydrogen storage device according to claim 1, characterized in that: Two pressure sensors are respectively installed on the inner side of the hydrogen storage tank inner liner and the inner side of the hydrogen storage tank outer liner.

3. A double-layer inner and outer tank pressure difference structure hydrogen storage device according to claim 1, characterized in that: An upper support column, a lower support column, a front support column and a rear support column are arranged between the inner liner of the hydrogen storage tank and the outer liner of the hydrogen storage tank. The inner liner of the hydrogen storage tank is installed inside the outer liner of the hydrogen storage tank through the upper support column, the lower support column, the front support column and the rear support column.

4. A double-layer inner and outer tank pressure difference structure hydrogen storage device according to claim 2, characterized in that: The load of the inner liner of the hydrogen storage tank is 70MPa, and the load of the outer liner of the hydrogen storage tank is 35MPa.

5. The double-layer inner and outer tank pressure difference structure hydrogen storage device according to claim 1 is characterized in that: The external valve is used to inflate and deflate the inner liner of the hydrogen storage tank.

6. A double-layer inner and outer tank pressure difference structure hydrogen storage device according to claim 1, characterized in that: The internal valve is used to inflate and deflate the inner liner of the hydrogen storage tank.

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