A carbon fiber composite material high-pressure hydrogen storage tank and its manufacturing process

Abstract

The present invention discloses a carbon fiber composite high-pressure hydrogen storage tank, including a tank body, a gas guide port is provided on one side of the tank body, a reinforcing member is provided in the inner cavity of the tank body for improving the strength of the tank body, and the side end of the reinforcing member is fixedly connected to the inner wall of the tank body, and the tank body and the reinforcing member are both made of carbon fiber composite materials. The present invention also discloses a manufacturing process of a carbon fiber composite high-pressure hydrogen storage tank. The present invention provides that the inner cavity of the tank body of the hydrogen storage tank is provided with a reinforcing member connecting and supporting the two ends of the inner wall of the tank body, and the inner wall of the tank body is provided with a reinforcing ring along the circumferential direction, so as to improve the overall strength and rigidity of the hydrogen storage tank and ensure that the hydrogen storage tank is safer and more reliable under high pressure.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen energy technology, and in particular to a carbon fiber composite material high-pressure hydrogen storage tank and a manufacturing process thereof. Background Art

[0002] The storage of hydrogen is one of the key links in the application of hydrogen energy. In order to store hydrogen efficiently and stably, more hydrogen must be accommodated in the same storage space, that is, hydrogen must be stored at a high density, and stability and safety must be guaranteed during the storage process.

[0003] The existing hydrogen storage tank types are mainly divided into four types: pure steel metal bottles (Type I), steel liner fiber wrapped bottles (Type II), aluminum liner fiber wrapped bottles (Type III) and plastic liner fiber wrapped bottles (Type IV). Type I and Type II bottles have low hydrogen storage density and poor safety performance, and it is difficult to meet the requirements of vehicle-mounted hydrogen storage density. Type III and Type IV bottles have the advantages of improving safety, reducing weight, and increasing mass hydrogen storage density. Therefore, they have been widely used. Among them, most foreign countries use Type IV bottles, while most domestic ones use Type III bottles. Compared with Type III bottles, Type IV bottles have excellent resistance to hydrogen embrittlement corrosion, lighter weight, lower cost, higher mass hydrogen storage density and cycle life, becoming the "new favorite" leading the development direction of international hydrogen energy vehicle high-pressure hydrogen storage containers. However, Type IV bottles also have many problems, such as how to seal the plastic liner with the metal bottle mouth, and whether the plastic liner can still meet the use requirements during the entire life cycle of the gas cylinder.

[0004] A carbon fiber composite high-pressure hydrogen storage tank is proposed, which has high strength and light weight. Compared with traditional hydrogen storage tanks that have the problem of combining different materials, the tank body is made of carbon fiber composite materials, which has better interlayer bonding and sealing. Summary of the invention

[0005] The purpose of the present invention is to provide a carbon fiber composite material high-pressure hydrogen storage tank and its manufacturing process. The inner cavity of the tank body is provided with reinforcement members connecting the two ends of the inner wall supporting the tank body, and the inner wall of the tank body is provided with reinforcement rings along the circumferential direction to improve the overall strength and rigidity of the hydrogen storage tank and ensure that the hydrogen storage tank is safer and more reliable under high pressure.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A carbon fiber composite high-pressure hydrogen storage tank comprises a tank body, a gas guide port is provided on one side of the tank body, a reinforcement member for improving the strength of the tank body is provided in the inner cavity of the tank body, a side end of the reinforcement member is fixedly connected to the inner wall of the tank body, and the tank body and the reinforcement member are both made of carbon fiber composite materials.

[0008] Preferably, the reinforcement member includes a plurality of reinforcement plates which are formed integrally with the tank body.

[0009] Preferably, the number of the reinforcing plates is four, and the cross-section of the reinforcing member is cross-shaped.

[0010] Preferably, the bottom end of the reinforcement extends to the bottom of the inner wall of the tank body.

[0011] Preferably, the can body comprises a preform layer and an outer winding layer covering the outer surface of the preform layer.

[0012] Preferably, the preform layer includes a first preform layer and a second preform layer, the second preform layer is attached to the inner surface of the outer winding layer, the end of the reinforcement is fixedly connected to the second preform layer to divide the inner cavity of the tank body into several cavities, and the first preform layer attached to the second preform layer and the reinforcement is provided in the cavity.

[0013] Preferably, the inner wall of the tank body is provided with a plurality of reinforcement rings along the circumferential direction.

[0014] Preferably, a metal air guide pipe is buried at the air guide port of the tank body.

[0015] Preferably, a sealing gasket is provided between the metal air duct at the corner and the tank body.

[0016] Preferably, a plurality of recessed portions are provided on the outer side of the metal air guide tube at the front end of the corner, and a protruding portion adapted to the recessed portion is provided on the inner wall of the tank body.

[0017] A manufacturing process of a carbon fiber composite material high-pressure hydrogen storage tank, characterized in that it comprises the following steps:

[0018] S1, processing and curing - a reinforcement member used to improve the strength of the tank body, and a plurality of cavity pre-grooves are formed on the reinforcement member;

[0019] S2, filling the silica gel air bag with high pressure air and maintaining the pressure continuously, so that the silica gel air bag expands and the surface of the silica gel air bag is covered with carbon fiber composite material once to form a first preform layer, thereby forming a cavity preform of the tank body;

[0020] S3, combining the cavity preforms made in step S2 and preforming them into the cavity preform groove of the reinforcement member in step S1 to form a tank body preform;

[0021] S4, the surface of the tank body preform produced in step S3 is covered with carbon fiber composite material for a second time to form a second preform layer, and a metal air guide pipe is buried at the air guide port of the tank body preform and between the first preform layer and the second preform layer;

[0022] S5, baking and curing the tank body preform after the second yarn wrapping in step S4, and then cooling it to room temperature, winding the surface of the second preform layer with a carbon fiber composite material to form an outer winding layer, and the outer winding layer extends to the outer surface of the metal air guide tube;

[0023] S6, baking and curing the tank preform wound in step S5, cooling it to room temperature, releasing the gas in the silica gel air bag and taking it out, and trimming the manufactured tank.

[0024] Preferably, in step S2, the silicone air bag is laterally provided with a groove on the outer surface of the cavity preform, and the first preform layer extends into the groove to form a reinforcement ring.

[0025] Preferably, in step S4, a sealing gasket is provided between the metal air guide tube located at the corner and the second preformed layer.

[0026] Preferably, in step S5, a plurality of recessed portions are provided on the outer side of the front end of the metal air guide tube at the corner, and a protruding portion adapted to the recessed portion is provided on the inner wall of the outer winding layer.

[0027] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0028] 1. The present invention discloses a carbon fiber composite high-pressure hydrogen storage tank and a manufacturing process thereof. The hydrogen storage tank adopts a multi-process co-curing molding technology of inner layer hollow blowing and outer layer winding, which can make the inner and outer layer fibers dense and smooth, and improve the product strength; the inner cavity of the tank body is provided with a reinforcement member connecting and supporting the two ends of the inner wall of the tank body, and the inner wall of the tank body is circumferentially provided with a reinforcement ring, which further improves the overall strength and rigidity of the hydrogen storage tank and ensures that the hydrogen storage tank is safer and more reliable under high pressure.

[0029] 2. The present invention discloses a carbon fiber composite high-pressure hydrogen storage tank and its manufacturing process. Except for the metal air guide pipe part, the hydrogen storage tank adopts high-end carbon fiber composite materials, which not only solves the interlayer bonding problem between various materials of the existing tank body, but also the carbon fiber composite material is light in weight, further reducing the weight of the hydrogen storage tank and facilitating transportation.

[0030] 3. The present invention relates to a carbon fiber composite material high-pressure hydrogen storage tank and its manufacturing process. A sealing gasket is filled between the metal air duct at the corner and the tank body, and the outer winding layer is provided with a protrusion that is inserted into the concave portion on the metal air duct to enhance the sealing performance of the tank body and the metal air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the reinforcement member of the present invention;

[0033] Figure 3 It is a longitudinal cross-sectional view of the present invention;

[0034] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle part;

[0035] Figure 5 For the present invention Figure 3 A partial enlarged view of part B in the middle;

[0036] Figure 6 For the present invention Figure 3 A partial enlarged view of the middle C area;

[0037] Figure 7 It is a cross-sectional view of the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of the silica gel air bag of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0041] Please refer to Figures 1 to 8 As shown, the present invention discloses a carbon fiber composite high-pressure hydrogen storage tank, including a tank body 1, a gas guide port 11 is opened on one side of the tank body 1, the inner cavity of the tank body 1 is provided with a reinforcement 2 for improving the strength of the tank body 1, and the side end of the reinforcement 2 is fixedly connected to the inner wall of the tank body 1, and the tank body 1 and the reinforcement 2 are both made of carbon fiber composite materials.

[0042] The reinforcement 2 includes several reinforcement plates and is integrally formed with the tank body 1. The reinforcement 2 formed by the several reinforcement plates divides the inner cavity of the tank body 1 into several cavities. In this embodiment, the number of reinforcement plates is four, and the cross-section of the reinforcement 2 is cross-shaped. The bottom end of the reinforcement 2 extends to the bottom of the inner wall of the tank body 1, dividing the inner cavity of the tank body 1 into four cavities.

[0043] The tank body includes a preform layer 12 and an outer winding layer 13 wrapped around the outer surface of the preform layer 12. The preform layer 12 includes a first preform layer 121 and a second preform layer 122, the second preform layer 122 is attached to the inner surface of the outer winding layer 13, the end of the reinforcement 2 is fixedly connected to the second preform layer 122 to form the above-mentioned four cavities in the inner cavity of the tank body 1, and the first preform layer 121 attached to the second preform layer 122 and the reinforcement 2 is provided in the cavity.

[0044] The first preformed layer 121 is located at both ends of the second preformed layer 122 and forms an arc corner when extending toward the reinforcement 2. Due to the arc corner, a gap is formed between the first preformed layer 121, the second preformed layer 122 and the reinforcement 2, and the gap is filled with carbon fiber filling yarn 14.

[0045] The inner wall of the tank body 1 is provided with a plurality of reinforcement rings 15 along the circumferential direction. In this embodiment, there are four reinforcement rings 15 , and each reinforcement ring 15 is divided into four sections. Each section is respectively arranged on the inner surface of the first preform layer 121 on the inner wall of four cavities.

[0046] A metal air pipe 3 for air intake and exhaust is buried at the air outlet 11 of the tank body 1. A pre-buried portion 31 is provided at the bottom of the metal pipe 3. A pre-buried groove for inserting the pre-buried portion 31 is provided at the air outlet 11 of the tank body 1 between the first pre-formed layer 121 and the second pre-formed layer 122. The outer winding layer 13 extends to the outer surface of the metal air pipe 3.

[0047] A sealing gasket 4 is filled between the metal air duct 3 at the corner and the second preformed layer 122. The sealing gasket 4 is made of rubber. A plurality of recessed portions 32 are provided on the outer side of the front end of the metal air duct 3 at the corner. A protruding portion 131 adapted to the recessed portion 32 is provided on the inner wall of the outer winding layer 13 to enhance the sealing performance between the tank body and the metal air duct.

[0048] The first preformed layer 121, the second preformed layer 122, the outer winding layer 13 and the reinforcement 2 of the tank body 1 are all made of carbon fiber composite materials, and the fibers are dense and smooth layer by layer, which improves the strength of the product.

[0049] A manufacturing process of a carbon fiber composite material high-pressure hydrogen storage tank comprises the following steps:

[0050] S1, processing and curing a reinforcement member 2 for improving the strength of the tank body, the reinforcement member 2 is formed with four cavity pre-grooves 21;

[0051] S2. Fill the silicone air bag with high-pressure air and keep the pressure to expand the silicone air bag and use the carbon fiber composite material to wrap the surface of the silicone air bag once to form a first preform layer 121, so as to form a cavity preform of the tank body 1. The silicone air bag is located on the outer surface of the cavity preform and a groove is transversely provided. The first preform layer 121 extends into the groove to form a reinforcement ring 15.

[0052] S3, combining the four cavity preforms made in step S2 and preforming them into the cavity preform groove 21 of the reinforcement 2 in step S1 to form a tank body preform, and filling the combined gap between the reinforcement 2 and the cavity preform with carbon fiber filling yarn 14;

[0053] S4, the surface of the tank body preform made in step S3 is covered with carbon fiber composite material for secondary yarn to form a second preform layer 233, and a metal air guide tube 3 is buried at the air guide port 11 of the tank body preform and between the first preform layer 121 and the second preform layer 122, and a sealing gasket 4 is filled between the metal air guide tube 3 at the corner and the second preform layer 122;

[0054] S5, baking and curing the tank body preform after the second yarn wrapping in step S4 and cooling it to room temperature, winding the surface of the second preform layer 122 with a carbon fiber composite material to form an outer winding layer 13, and the outer winding layer 13 extends to the outer surface of the metal air guide tube 3, wherein the outer side of the front end of the metal air guide tube 3 at the corner is provided with a plurality of recessed portions 32, and the inner wall of the outer winding layer 13 is provided with a protruding portion 131 adapted to the recessed portion 32;

[0055] S6. The tank body preform wound in step S5 is baked and cured, and then cooled to room temperature, the gas in the silica gel air bag is released and taken out, and the manufactured tank body 1 is trimmed and processed to finally form a finished hydrogen storage tank.

[0056] 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 changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A carbon fiber composite material high-pressure hydrogen storage tank, comprising a tank body, one side of which is provided with an air guide port, characterized in that: The inner cavity of the tank body is provided with a reinforcement member for improving the strength of the tank body, the side end of the reinforcement member is fixedly connected to the inner wall of the tank body, and the tank body and the reinforcement member are both made of carbon fiber composite materials; The tank body comprises a preformed layer and an outer winding layer covering the outer surface of the preformed layer; the preformed layer comprises a first preformed layer and a second preformed layer, the second preformed layer is attached to the inner surface of the outer winding layer, the end of the reinforcement is fixedly connected to the second preformed layer to divide the inner cavity of the tank body into a plurality of cavities, the first preformed layer attached to the second preformed layer and the reinforcement is arranged in the cavity; the gap formed by the first preformed layer, the second preformed layer and the reinforcement is filled with carbon fiber filling yarn; A metal air guide tube is buried at the air guide port of the tank body, a sealing gasket is filled between the metal air guide tube and the tank body at the corner, a plurality of recessed portions are opened on the outside of the metal air guide tube at the front end of the corner, and a protrusion adapted to the recessed portions is provided on the inner wall of the tank body.

2. A carbon fiber composite material high-pressure hydrogen storage tank as claimed in claim 1, characterized in that: The reinforcement member includes a plurality of reinforcement plates and is integrally formed with the tank body.

3. A carbon fiber composite material high-pressure hydrogen storage tank as claimed in claim 2, characterized in that: The number of the reinforcing plates is four, and the cross section of the reinforcing member is cross-shaped.

4. A carbon fiber composite material high-pressure hydrogen storage tank as claimed in claim 2, characterized in that: The bottom end of the reinforcement member extends to the bottom of the inner wall of the tank body.

5. A carbon fiber composite material high-pressure hydrogen storage tank as claimed in claim 1, characterized in that: The inner wall of the tank body is provided with a plurality of reinforcement rings along the circumferential direction.

6. A process for manufacturing a carbon fiber composite material high-pressure hydrogen storage tank according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, processing and curing - a reinforcement member used to improve the strength of the tank body, and a plurality of cavity pre-grooves are formed on the reinforcement member; S2, filling the silica gel air bag with high pressure air and maintaining the pressure continuously, so that the silica gel air bag expands and the surface of the silica gel air bag is covered with carbon fiber composite material once to form a first preform layer, thereby forming a cavity preform of the tank body; S3, combining the cavity preforms made in step S2 and preforming them into the cavity preform groove of the reinforcement member in step S1 to form a tank body preform; S4, the surface of the tank body preform produced in step S3 is covered with carbon fiber composite material for a second time to form a second preform layer, and a metal air guide pipe is buried at the air guide port of the tank body preform and between the first preform layer and the second preform layer; S5, baking and curing the tank body preform after the second yarn wrapping in step S4, and then cooling it to room temperature, winding the surface of the second preform layer with a carbon fiber composite material to form an outer winding layer, and the outer winding layer extends to the outer surface of the metal air guide tube; S6, baking and curing the tank preform wound in step S5, cooling it to room temperature, releasing the gas in the silica gel air bag and taking it out, and trimming the manufactured tank.

7. The manufacturing process of a carbon fiber composite material high-pressure hydrogen storage tank according to claim 6, characterized in that: In step S2, the silicone air bag is disposed on the outer surface of the cavity preform and a groove is transversely provided thereon, and the first preform layer extends into the groove to form a reinforcement ring.

8. The manufacturing process of a carbon fiber composite material high-pressure hydrogen storage tank according to claim 6, characterized in that: In step S4, a sealing gasket is provided between the metal air guide tube at the corner and the second preformed layer.

9. The manufacturing process of a carbon fiber composite material high-pressure hydrogen storage tank according to claim 6, characterized in that: In step S5, a plurality of recessed portions are provided on the outer side of the front end of the metal air guide tube at the corner, and a protruding portion adapted to the recessed portion is provided on the inner wall of the outer winding layer.

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