Three-dimensional woven hydrogen storage bottle and manufacturing method thereof

Abstract

The invention discloses a three-dimensional woven hydrogen storage bottle and a manufacturing method thereof, and relates to the technical field of hydrogen storage containers. The three-dimensional woven hydrogen storage bottle comprises an inner container and a three-dimensional woven reinforcing structure, wherein the three-dimensional woven reinforcing structure comprises a carbon fiber three-dimensional woven layer and a glass fiber three-dimensional woven layer which are sequentially coated on the outer surface of the inner container from inside to outside. According to the three-dimensional woven hydrogen storage bottle, the carbon fiber three-dimensional woven layer and the glass fiber three-dimensional woven layer are integrally formed by adopting a three-dimensional overall weaving technology, so that the interior and the interlayer of the reinforcing layer are interwoven and interlocked in a three-dimensional space through warp yarns, weft yarns and binding yarns, and a single continuum without a clear weak interface is formed; according to the structure, the layering damage mode of a traditional laminated structure is avoided, the interlayer shear strength is improved by 50% or above, the structural integrity and safety of the hydrogen storage bottle under the working conditions of extreme internal pressure, external impact and collision are enhanced, and the performance of the hydrogen storage bottle far exceeds that of a traditional winding technology under the same fiber consumption.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage container technology, specifically to a three-dimensional woven hydrogen storage bottle and its manufacturing method. Background Technology

[0002] With the rapid development of hydrogen energy technology, high-pressure hydrogen storage cylinders are key components of mobile equipment such as fuel cell vehicles. Their performance directly affects the range and safety of the entire system. Currently, the mainstream types of hydrogen storage cylinders are Type III (metal liner with fully wrapped fiber) and Type IV (plastic liner with fully wrapped fiber).

[0003] While traditional fiber winding technologies (such as helical winding and circumferential winding) can provide high circumferential strength, they are insufficient in withstanding complex loads, especially in low-cycle fatigue, impact damage, and axial strength during cyclic hydrogen charging and discharging. The interlayer structure formed by the winding process relies mainly on resin bonding between layers, resulting in obvious interfaces and low interlayer shear strength. Under long-term alternating loads, delamination failure is prone to occur, reducing the product's service life and reliability. Traditional hydrogen storage cylinders mostly use wet winding processes, which have problems such as difficulty in controlling the resin content and low production efficiency. In contrast, the dry winding process pre-impregnates the fibers with resin, precisely controlling the resin content with fluctuations within 2%, and eliminating the need to adjust the resin mass fraction during the winding process.

[0004] Three-dimensional weaving technology is an advanced textile composite molding technology that forms a complete, non-layered, integral mesh structure through the interweaving of fibers in space. This structure holds the promise of fundamentally solving the problem of weak interlayer performance in traditional wound composites. However, effectively applying three-dimensional weaving technology to hydrogen storage cylinders with specific geometries and extremely high pressure bearing requirements remains a pressing technical challenge in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a three-dimensional braided hydrogen storage cylinder and its manufacturing method. It employs a three-dimensional integral braiding technology to integrally form a three-dimensional braided carbon fiber layer and a three-dimensional braided glass fiber layer. This allows the reinforcing layers and interlayers to interweave and interlock in three-dimensional space through warp, weft, and binding yarns, forming a single continuous body without clearly defined weak interfaces. This structure avoids the delamination failure mode of traditional laminated structures, increases interlayer shear strength by more than 50%, and enhances the structural integrity and safety of the hydrogen storage cylinder under extreme internal pressure, external impact, and collision conditions. With the same amount of fiber, its performance far surpasses that of traditional winding processes.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a three-dimensional woven hydrogen storage cylinder, comprising an inner liner and a three-dimensional woven reinforcement structure, wherein the three-dimensional woven reinforcement structure comprises a carbon fiber three-dimensional woven layer and a glass fiber three-dimensional woven layer sequentially covering the outer surface of the inner liner from the inside out, and both the carbon fiber three-dimensional woven layer and the glass fiber three-dimensional woven layer are integrally formed through a three-dimensional integral woven process.

[0007] Preferably, the outer surface of the inner liner is treated with plasma to enhance the interfacial bonding between the inner liner and the three-dimensional woven carbon fiber layer.

[0008] Preferably, the inner liner is a plastic inner liner, and the material of the inner liner is selected from high-density polyethylene or polyamide.

[0009] Preferably, the carbon fiber three-dimensional braided layer is a preform made using a three-dimensional circular tube braiding process. The thickness of the carbon fiber three-dimensional braided layer is 3 to 20 millimeters. The fibers of the carbon fiber three-dimensional braided layer include main yarns arranged circumferentially along the hydrogen storage cylinder, main yarns arranged radially, and edge yarns arranged at intervals in the inner and outer layers of the main yarn array, which together form a ring array.

[0010] Preferably, the three-dimensional woven carbon fiber layer is woven from carbon fiber prepreg tape or prepreg yarn impregnated with an epoxy resin system, wherein the mass fraction of the epoxy resin is 20% to 35%.

[0011] Preferably, the glass fiber three-dimensional braided layer is formed by a three-dimensional circular tube braiding process, the thickness of the glass fiber three-dimensional braided layer is 2mm to 10mm, and the fibers of the glass fiber three-dimensional braided layer include main yarns arranged circumferentially along the hydrogen storage cylinder, main yarns arranged radially, and edge yarns arranged at intervals in the inner and outer layers of the main yarn array, which together form a ring array.

[0012] Preferably, the three-dimensional woven glass fiber layer is woven from glass fiber prepreg tape or prepreg yarn impregnated with an epoxy resin system, wherein the mass fraction of the epoxy resin is 20% to 35%.

[0013] Preferably, the viscosity of the epoxy resin system at the weaving process temperature is between 150 cps and 800 cps.

[0014] Preferably, the carbon fiber three-dimensional braided layer and the glass fiber three-dimensional braided layer are cured to form an integral composite structure. The curing temperature is 80 to 150°C and the time is 3 to 8 hours.

[0015] This invention also discloses a method for manufacturing a three-dimensional woven hydrogen storage cylinder, the method comprising the following steps:

[0016] Step S1: Provide an inner liner and perform plasma treatment on the outer surface of the inner liner;

[0017] Step S2: Using the plasma-treated inner liner as a core mold, a three-dimensional carbon fiber woven layer is integrally woven on the outer surface of the inner liner through a three-dimensional integral weaving process.

[0018] Step S3: On the outer surface of the carbon fiber three-dimensional braided layer, a glass fiber three-dimensional braided layer is integrally woven using a three-dimensional integral braiding process to obtain a preform;

[0019] Step S4: The preform is cured to solidify the carbon fiber three-dimensional braided layer and the glass fiber three-dimensional braided layer to obtain the three-dimensional braided hydrogen storage bottle.

[0020] The technical effects and advantages of this invention are as follows:

[0021] 1. This three-dimensional braided hydrogen storage cylinder adopts a three-dimensional integral braiding technology to integrally form a three-dimensional braided carbon fiber layer and a three-dimensional braided glass fiber layer. This allows the internal and interlayer structures of the reinforcing layer to interweave and interlock in three-dimensional space through warp, weft, and binding yarns, forming a single continuous body without a clear weak interface. This structure avoids the delamination failure mode of traditional laminated structures, increases the interlayer shear strength by more than 50%, and enhances the structural integrity and safety of the hydrogen storage cylinder under extreme internal pressure, external impact, and collision conditions. With the same amount of fiber, its performance far exceeds that of traditional winding processes.

[0022] 2. This three-dimensional woven hydrogen storage cylinder features a spatial network structure that makes the load transfer path more diverse and uniform, effectively dispersing stress concentration. When microcracks are generated inside the material due to cyclic loading, the multi-dimensional oriented fiber network can effectively bridge and inhibit the propagation of cracks, improving the service life and reliability of the hydrogen storage cylinder in frequent hydrogen charging and discharging working environments, and reducing the risk of failure due to fatigue accumulation.

[0023] 3. This three-dimensional woven hydrogen storage cylinder can achieve precise equal strength design by changing the weaving structure and local thickness, minimizing material usage while ensuring safety, thus achieving further weight reduction of the hydrogen storage cylinder. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the container provided in an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of a three-dimensional woven preform provided in an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of a three-dimensional weaving machine provided in an embodiment of the present invention.

[0028] In the diagram: 10, inner liner; 20, carbon fiber three-dimensional braided layer; 30, glass fiber three-dimensional braided layer. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This embodiment discloses a three-dimensional woven hydrogen storage bottle, according to the attached... Figure 1 To be continued Figure 3 As shown, it includes an inner liner 10, a carbon fiber three-dimensional braided layer 20 covering the outer surface of the inner liner 10, and a glass fiber three-dimensional braided layer 30 covering the outer surface of the carbon fiber three-dimensional braided layer 20.

[0031] According to the appendix Figure 1 As shown, the inner liner 10 constitutes the innermost barrier layer of the hydrogen storage cylinder, used for direct contact and sealing storage of high-pressure hydrogen. The outer surface of the inner liner 10 is plasma-treated to activate its surface, increase its surface energy, and thus enhance the interfacial bonding with subsequent composite materials. Furthermore, the inner liner 10 is a plastic inner liner 10, and its material is selected from high-density polyethylene (HDPE) or polyamide (PA), such as PA6, PA612, PA11, etc., which have good airtightness, resistance to hydrogen embrittlement, and processing performance.

[0032] According to the appendix Figure 1 and attached Figure 2As shown, the three-dimensional carbon fiber braided layer 20 is the main pressure-bearing reinforcement layer of the hydrogen storage cylinder. It is integrally formed using a three-dimensional circular tube braiding process, directly woven onto the outer surface of the plasma-treated inner liner 10, forming a tightly fitted cylindrical mesh prefabricated body. The thickness of the three-dimensional carbon fiber braided layer 20 is 3 mm to 20 mm. Its internal fiber structure includes: main yarns arranged circumferentially along the hydrogen storage cylinder, primarily bearing the circumferential stress generated by internal pressure; main yarns arranged axially along the hydrogen storage cylinder, primarily bearing the axial load; and edge yarns, also called binding yarns, arranged at intervals between the inner and outer layers of the circumferential and axial main yarn arrays. These edge yarns shuttle radially, weaving and binding the circumferential and axial main yarn systems into a complete, non-layered three-dimensional integral structure, collectively forming a ring array. Furthermore, the three-dimensional carbon fiber braided layer 20 is woven from carbon fiber prepreg tape or prepreg yarn impregnated with an epoxy resin system. The mass fraction of epoxy resin in the prepreg is 20% to 35%. The epoxy resin system has a viscosity of 150 cps to 800 cps at the process temperature to ensure good wettability of the resin to the fiber bundle.

[0033] According to the appendix Figure 1 As shown, the glass fiber three-dimensional braided layer 30 serves as the outer protective layer of the hydrogen storage cylinder, providing both reinforcement and impact cushioning. It is also integrally formed using a three-dimensional circular tube braiding process, directly woven onto the outer surface of the carbon fiber three-dimensional braided layer 20. The thickness of the glass fiber three-dimensional braided layer 30 ranges from 2 mm to 10 mm. Its internal fiber structure is similar to that of the carbon fiber three-dimensional braided layer 20, also including main yarns arranged circumferentially and axially, as well as spaced edge yarns, collectively forming a three-dimensional integrated mesh structure. Specifically, the glass fiber three-dimensional braided layer 30 is woven from glass fiber prepreg tape or prepreg yarn impregnated with an epoxy resin system. The mass fraction of the epoxy resin is also 20% to 35%, with a viscosity range of 150 cps to 800 cps.

[0034] According to the appendix Figure 1 To be continued Figure 3 As shown, the carbon fiber three-dimensional braided layer 20 and the glass fiber three-dimensional braided layer 30 together constitute a three-dimensional braided reinforcement structure. After weaving, the preform containing the inner liner 10 and the two braided layers needs to be cured. The curing temperature is 80℃ to 150℃, and the time is 3 hours to 8 hours. During this process, the epoxy resin system undergoes a cross-linking reaction, causing the carbon fiber three-dimensional braided layer 20 and the glass fiber three-dimensional braided layer 30 to cure and bond tightly, while forming a strong interface with the inner liner 10, ultimately resulting in a structurally complete three-dimensional braided hydrogen storage bottle.

[0035] According to the appendix Figure 2 To be continued Figure 3As shown, the three-dimensional integral weaving process is specifically disclosed and completed on a dedicated three-dimensional weaving machine. During weaving, the inner core 10 serves as the mandrel, and the movement of the yarn carrier is controlled by a program to interweave the warp yarns axially, the weft yarns circumferentially, and the binding yarns radially in space. This directly forms the prefabricated structure of the carbon fiber three-dimensional braided layer 20 and the glass fiber three-dimensional braided layer 30 on the mandrel, achieving integrated and near-net-shape forming of the reinforcement structure.

[0036] According to the appendix Figure 1 To be continued Figure 3 As shown, it is particularly important to emphasize that the "three-dimensional integral weaving process" of this invention is fundamentally different from the traditional fiber winding process. The laminated structure formed by the winding process is mainly bonded by resin between layers, resulting in weak interfaces. In contrast, three-dimensional weaving, through the interlacing of fibers in three spatial directions, forms a single integral structure with interlocking fiber networks, fundamentally eliminating the risk of delamination and greatly improving interlayer shear strength and impact resistance.

[0037] According to the appendix Figure 1 To be continued Figure 3 As shown, it is particularly important to emphasize that the thickness of the carbon fiber three-dimensional braided layer 20 and the glass fiber three-dimensional braided layer 30 can be flexibly adjusted according to the design pressure, volume, and lightweight requirements of the hydrogen storage cylinder. For example, a larger thickness can be used in the main pressure-bearing area of ​​the cylinder body, while a smaller thickness can be smoothly transitioned to the end cap areas to achieve equal strength design and optimize material usage while ensuring safety.

[0038] Example 1: This example uses a high-density polyethylene (HDPE) inner liner 10 and a fiber layer of a specific thickness as an example, combined with... Figure 1 To be continued Figure 3 The workflow is explained in detail below:

[0039] First, the inner liner 10 made of HDPE material is manufactured using injection molding. The outer surface of the inner liner 10 is then subjected to comprehensive plasma treatment to enhance its surface activity.

[0040] Next, the three-dimensional woven carbon fiber layer 20 is formed. The plasma-treated inner liner 10 is used as a mandrel and loaded onto a three-dimensional braiding machine. Medium-temperature curing epoxy resin carbon fiber prepreg tape with a resin content of 33% is used as the raw material. Through programmed control of the braiding process, a carbon fiber three-dimensional woven layer 20 preform with a thickness of approximately 18 mm is formed in the bottle body section, and then smoothly thins to approximately 7 mm towards the end caps. In the braided structure, the axial yarns bear the axial load, the circumferential yarns bear the circumferential load, and the radial binding yarns bind the yarns in all directions together as a whole.

[0041] Next, the glass fiber three-dimensional braided layer 30 is formed. On the outer surface of the formed carbon fiber three-dimensional braided layer 20, epoxy resin glass fiber prepreg tape with a resin content of 20% is used to braid a glass fiber three-dimensional braided layer 30 preform with a thickness of about 4 mm on the same or another three-dimensional braiding machine.

[0042] Then, the obtained complete preform, including the inner liner 10, the carbon fiber three-dimensional woven layer 20, and the glass fiber three-dimensional woven layer 30, is removed from the weaving machine and transferred to a curing oven for curing. The curing procedure is as follows: heat to 80°C and hold for 2 hours, then heat to 120°C and hold for 4 hours.

[0043] Finally, after cooling in the furnace to below 60°C, the finished three-dimensional woven hydrogen storage cylinder is obtained. Testing showed that the cylinder's burst pressure reached 37.8 MPa.

[0044] Example 2, this example uses a high-density polyethylene (HDPE) inner liner 10 and a thickened fiber layer as an example, combined with the attached... Figure 1 To be continued Figure 3 The workflow is described in detail, and it is basically the same as that in Example 1.

[0045] The difference lies in the process parameters: the thickness of the carbon fiber three-dimensional braided layer 20 is increased to about 30 mm, and the thickness of the glass fiber three-dimensional braided layer 30 is increased to about 6 mm.

[0046] The curing process is the same as in Example 1. Testing showed that the burst pressure of the gas cylinder significantly increased to 62.0 MPa.

[0047] Example 3: This example uses a high-density polyethylene (HDPE) inner liner 10 and a fiber layer with a different thickness ratio as an example, combined with... Figure 1 To be continued Figure 3 The workflow is described in detail, and it is basically the same as that in Example 1.

[0048] The difference lies in the process parameters: the thickness of the carbon fiber three-dimensional braided layer 20 is about 20 mm, and the thickness of the glass fiber three-dimensional braided layer 30 is about 9 mm.

[0049] The curing process is the same as in Example 1. The burst pressure of the gas cylinder was tested to be 39.3 MPa.

[0050] Example 4, this example uses a polyamide PA6 inner liner 10 and a fiber layer of a specific thickness as an example, combined with the attached... Figure 1 To be continued Figure 3 The workflow is described in detail, and it is basically the same as that in Example 1.

[0051] The difference lies in the material of the inner liner 10: the inner liner 10 is made of polyamide PA6 through injection molding.

[0052] Process parameters: The thickness of the carbon fiber three-dimensional braided layer 20 is approximately 20 mm, and the thickness of the glass fiber three-dimensional braided layer 30 is approximately 4 mm.

[0053] The curing process is the same as in Example 1. The burst pressure of the gas cylinder was tested to be 40.1 MPa.

[0054] Example 5, this example uses a polyamide PA6 inner liner 10 and a thickened fiber layer as an example, combined with the attached... Figure 1 To be continued Figure 3 The workflow is described in detail. The workflow is basically the same as in Example 2, but the inner liner 10 is made of polyamide PA6.

[0055] Process parameters: The thickness of the carbon fiber three-dimensional braided layer 20 is approximately 32 mm, and the thickness of the glass fiber three-dimensional braided layer 30 is approximately 5 mm.

[0056] The curing process is the same as in Example 1. The burst pressure of the gas cylinder was tested to be 59.8 MPa.

[0057] Comparative Example 1: This comparative example uses a traditional dry winding process to prepare a high-pressure hydrogen storage bottle, for comparison with the embodiments of the present invention. The workflow is as follows:

[0058] The inner liner is made of high-density polyethylene (HDPE) injection molding 10.

[0059] Using the same carbon fiber prepreg and glass fiber prepreg as in Example 1, a reinforcing layer was alternately wound onto the outer surface of the inner liner 10 using a dry winding process. The number of winding layers was controlled so that the final thickness of the carbon fiber three-dimensional braided layer was approximately 22 mm and the thickness of the glass fiber three-dimensional braided layer was approximately 5 mm, making its total thickness close to that of Example 1 or Example 5 for fair comparison.

[0060] After the winding is completed, resin impregnation and curing are performed. The curing process is the same as in Example 1.

[0061] After cooling and demolding, a comparative sample was obtained. The test showed that the burst pressure of this gas cylinder was 26.5 MPa.

[0062] Comparative Example 2: This comparative example uses a traditional dry winding process and a polyamide inner liner 10 to prepare a high-pressure hydrogen storage bottle, which is used for comparison with the embodiments of the present invention. The workflow is basically the same as that of Comparative Example 1.

[0063] The difference lies in the fact that the inner liner 10 is made of polyamide PA6, and the thickness of the fiber winding layer is controlled to be about 30 mm for the three-dimensional woven carbon fiber layer and about 5 mm for the three-dimensional woven glass fiber layer, making it close to the total fiber thickness of Example 5.

[0064] The curing process is the same as in Example 1. The burst pressure of the gas cylinder was tested to be 47.9 MPa.

[0065] Furthermore, in order to verify the advantages of the preparation process of the present invention, an explosion test was conducted on the prepared Type IV high-pressure hydrogen storage cylinder. Similarly, the comparative sample under the same test was also subjected to an explosion test. The specific data are shown in Table 1.

[0066] Table 1:

[0067] name Bottle craftsmanship Fiber layer thickness (mm) Inner liner material Explosion pressure (MPa) Example 1 Dry 3D weaving 18mm carbon layer + 4mm glass fiber layer High-density polyethylene 37.8 Example 2 Dry 3D weaving 30mm carbon layer + 6mm glass fiber layer High-density polyethylene 62.0 Example 3 Dry 3D weaving 20mm carbon layer + 9mm glass fiber layer High-density polyethylene 39.3 Example 4 Dry 3D weaving 20mm carbon layer + 4mm glass fiber layer Polyamide PA6 40.1 Example 5 Dry 3D weaving 32mm carbon layer + 5mm glass fiber layer Polyamide PA6 59.8 Comparative Example 1 Dry winding Carbon layer 22 + glass fiber layer 5mm High-density polyethylene 26.5 Comparative Example 2 Dry winding 30mm carbon layer + 5mm glass fiber layer Polyamide PA6 47.9

[0068] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-dimensional woven hydrogen storage cylinder, characterized in that, include: Inner liner (10); The three-dimensional braided reinforcement structure includes a carbon fiber three-dimensional braided layer (20) and a glass fiber three-dimensional braided layer (30) that are sequentially wrapped around the outer surface of the inner liner (10) from the inside out. The carbon fiber three-dimensional braided layer (20) and the glass fiber three-dimensional braided layer (30) are integrally formed by a three-dimensional integral braiding process.

2. The three-dimensional braided hydrogen storage bottle according to claim 1, characterized in that, The outer surface of the inner liner (10) is treated with plasma to enhance the interfacial bonding force between the inner liner (10) and the three-dimensional woven carbon fiber layer (20).

3. The three-dimensional woven hydrogen storage bottle according to claim 2, characterized in that, The inner liner (10) is a plastic inner liner, and the material of the inner liner (10) is selected from high-density polyethylene or polyamide.

4. The three-dimensional braided hydrogen storage bottle according to claim 1, characterized in that, The carbon fiber three-dimensional braided layer (20) is a preform made using a three-dimensional circular tube braiding process. The thickness of the carbon fiber three-dimensional braided layer (20) is 3 to 20 millimeters. The fibers of the carbon fiber three-dimensional braided layer (20) include main yarns arranged circumferentially along the hydrogen storage cylinder, main yarns arranged radially, and edge yarns arranged at intervals in the inner and outer layers of the main yarn array, which together form a ring array.

5. The three-dimensional woven hydrogen storage bottle according to claim 4, characterized in that, The three-dimensional woven carbon fiber layer (20) is woven from carbon fiber prepreg tape or prepreg yarn impregnated with an epoxy resin system, wherein the mass fraction of the epoxy resin is 20% to 35%.

6. The three-dimensional braided hydrogen storage bottle according to claim 1, characterized in that, The glass fiber three-dimensional braided layer (30) is formed by a three-dimensional circular tube braiding process. The thickness of the glass fiber three-dimensional braided layer (30) is 2mm to 10mm. The fibers of the glass fiber three-dimensional braided layer (30) include main yarns arranged along the circumference of the hydrogen storage bottle, main yarns arranged along the radial direction, and edge yarns arranged at intervals in the inner and outer layers of the main yarn array, which together form a ring array.

7. The three-dimensional braided hydrogen storage bottle according to claim 6, characterized in that, The three-dimensional woven glass fiber layer (30) is woven from glass fiber prepreg tape or prepreg yarn impregnated with an epoxy resin system, wherein the mass fraction of the epoxy resin is 20% to 35%.

8. The three-dimensional braided hydrogen storage bottle according to claim 7, characterized in that, The viscosity of the epoxy resin system at the weaving process temperature is 150 cps to 800 cps.

9. The three-dimensional woven hydrogen storage bottle according to claim 1, characterized in that, The carbon fiber three-dimensional braided layer (20) and the glass fiber three-dimensional braided layer (30) are cured to form an integral composite structure. The curing temperature is 80 to 150°C and the time is 3 to 8 hours.

10. The method for manufacturing a three-dimensional braided hydrogen storage cylinder according to any one of claims 1-9, characterized in that, The manufacturing method includes the following steps: Step S1: Provide an inner liner (10) and perform plasma treatment on the outer surface of the inner liner (10); Step S2: Using the plasma-treated inner liner (10) as a core mold, a three-dimensional carbon fiber three-dimensional braided layer (20) is integrally woven on the outer surface of the inner liner (10) through a three-dimensional integral braiding process. Step S3: On the outer surface of the carbon fiber three-dimensional braided layer (20), a glass fiber three-dimensional braided layer (30) is integrally woven using a three-dimensional integral braiding process to obtain a preform; Step S4: The preform is cured to solidify the carbon fiber three-dimensional braided layer (20) and the glass fiber three-dimensional braided layer (30) to obtain the three-dimensional braided hydrogen storage bottle.

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