A biomimetic winding device and preparation method of a carbon fiber reinforced aluminum alloy hydrogen storage tank

Abstract

The present application relates to the technical field of carbon fiber composite materials, in particular to a kind of bionic winding device and preparation method of carbon fiber reinforced aluminum alloy hydrogen storage tank.The core design concept of the present application is bionic, that is, simulate the hollow structure of honeycomb and other organisms, carbon fiber bundle is woven and wound in the form of specific gap arrangement on the surface of aluminum alloy hydrogen storage tank inner container.In the winding process, carbon fiber bundle is woven into continuous woven cloth with bionic structure in advance, and then coated on the tank body.This method aims to optimize stress distribution, improve the pressure-bearing capacity and comprehensive performance of composite material shell, so as to realize high-pressure safe hydrogen storage of hydrogen storage tank.The present application also relates to a special device for covering carbon fiber bundle in woven structure on aluminum alloy hydrogen storage tank and a method for preparing carbon fiber reinforced aluminum alloy hydrogen storage tank.The present application covers carbon fiber bundle on the surface of hydrogen storage tank by weaving, and then protects the fiber with resin and fills the gap between fiber bundles with resin in the subsequent hydrogen storage tank forming process, so as to realize gap filling resin to enhance overall performance and overcome the drawbacks of carbon fiber being easily damaged at the same time.

Description

Technical Field

[0001] This invention belongs to the field of special structural composite material preparation technology, specifically relating to a biomimetic winding device and preparation method for a carbon fiber reinforced aluminum alloy hydrogen storage tank. Background Technology

[0002] Hydrogen is one of the fastest-growing clean energy sources in recent years. Due to its high energy density, abundant reserves, and the fact that its combustion product is only water, it has been widely used in industry, transportation, power, and daily life. With the widespread application of hydrogen energy, the storage and transportation of hydrogen, as a bridge connecting production and application, has become an increasingly important focus. Ensuring safe storage and transportation while overcoming the inherent limitations of hydrogen itself has become a key concern.

[0003] Fiber-wound composite pressure vessels, especially carbon fiber reinforced metal-lined hydrogen storage tanks, are widely used in hydrogen storage and transportation due to their high specific strength, high specific modulus, and good fatigue resistance. Traditional fiber winding processes typically involve directly winding continuous fiber bundles onto the surface of a mandrel under tension control, resulting in a dense layup structure. For example, the invention "Automated Processing Equipment for Fiber-Wound Bearings" discloses an automated processing device for fiber winding, but it still uses a stacked fiber bundle weaving method, failing to achieve performance improvement. Similarly, the invention "A Winding Device for Asynchronous Frame Gas Cylinders" discloses a winding device for asynchronous frame gas cylinders, but it uses a large number of fiber bundles for weaving, significantly increasing manufacturing costs.

[0004] Inspired by the multi-level hollow or gradient porous structures of certain biological structures in nature (such as bamboo and bones), introducing biomimetic design into composite materials holds promise for optimizing stress distribution, reducing weight, and enhancing energy absorption. However, existing winding equipment and processes struggle to directly and precisely fabricate fiber preforms with predetermined gaps or specific weaving arrangements during the winding process. Therefore, developing a device and method capable of achieving biomimetic structural winding is of great significance for improving the overall performance of carbon fiber reinforced aluminum alloy hydrogen storage tanks. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The present invention aims to provide a biomimetic winding device and preparation method for a carbon fiber reinforced aluminum alloy hydrogen storage tank, so as to solve the problem that it is difficult to directly prepare a fiber layer with a specific biomimetic arrangement structure during the winding process in the prior art.

[0007] To address this, a biomimetic approach was adopted, drawing inspiration from the hollow structure of biological organisms to achieve a more spaced fiber bundle arrangement, thus increasing the load-bearing capacity of the carbon fiber woven fabric. By adjusting the fiber bundle spacing and angle, and changing the number of fiber bundle layers, optimal parameters were determined, ultimately enabling the fabrication of a carbon fiber reinforced aluminum alloy hydrogen storage tank. Compared to traditional winding methods, this technology simultaneously reduces carbon fiber usage, lowers costs, improves the overall material performance, and does not increase process complexity, meeting the needs of multiple fields for carbon fiber reinforced aluminum alloy hydrogen storage tanks.

[0008] (II) Technical Solution

[0009] A biomimetic winding device for a carbon fiber reinforced aluminum alloy hydrogen storage tank is characterized by comprising a winding platform, a hydrogen storage tank clamp, a braiding tool head, a lead screw track, and a sliding track, enabling integrated braiding and winding. The hydrogen storage tank clamp is mounted on the winding platform and is used to clamp and drive the inner liner of the aluminum alloy hydrogen storage tank to rotate. The braiding tool head is located on one side of the hydrogen storage tank clamp and is connected to the lead screw track and the sliding track via a slider. The lead screw track drives the braiding tool head to move in a direction parallel to the axis of the hydrogen storage tank, and the sliding track drives the braiding tool head to move in a direction perpendicular to the axis of the hydrogen storage tank, and the angle of the braiding tool head relative to the surface of the hydrogen storage tank can be adjusted in real time. The internal structure of the braiding tool head includes carbon fiber bundle wheels, an eccentric wheel, and a sliding shuttle. Multiple carbon fiber bundle wheels are used to supply longitudinal carbon fiber bundles. The eccentric wheel, driven by a drive device, can pull the longitudinal carbon fiber bundles to move alternately up and down. The sliding shuttle, driven by a drive device, can pull the transverse carbon fiber bundles to move left and right. Through the coordinated movement of the eccentric wheel and the sliding shuttle, multiple independent bundles of carbon fibers are woven into a continuous carbon fiber woven fabric inside the weaving tool head, and then exported from the output end of the weaving tool head. The weaving speed is 20-60 times / minute.

[0010] This invention provides a method for preparing a carbon fiber reinforced aluminum alloy hydrogen storage tank, using the aforementioned preparation apparatus, which includes the following steps:

[0011] S1. Fiber Weaving: Inside the weaving tool head, a carbon fiber bundle wheel supplies longitudinal fiber bundles, which move alternately up and down under the drive of an eccentric wheel assembly. Simultaneously, transverse fiber bundles move laterally through each other under the drive of a sliding shuttle, spontaneously weaving multiple independent carbon fiber bundles into a continuous carbon fiber woven fabric with a predetermined arrangement structure inside the tool head. The weaving speed is 20-60 times / minute. The woven carbon fiber fabric is continuously output from the output end of the weaving tool head.

[0012] Based on biomimetic design requirements, the arrangement structure of the carbon fiber woven fabric was selected. The arrangement structure includes a flat, densely packed arrangement; a flat, cross-densely packed arrangement; a flat, spaced arrangement; and a cross-densely packed arrangement. For the flat, densely packed arrangement: pulleys P1, P2, and P3 simultaneously move the fiber bundle up and down along the Z-axis, changing the shuttle angle to 30° with the X-axis. Each up-and-down movement of the eccentric wheel corresponds to one laying operation by the shuttle. For the flat, cross-densely packed arrangement: eccentric wheels P1, P2, and P3 are adjusted to move individually. After P1 moves downward, the shuttle moves the fiber bundle horizontally once. P1 returns to its original position, then P2 moves downward, and the shuttle moves the fiber bundle a second time. P3 uses the same movement to achieve a cross-dense arrangement of the fiber bundles. For the flat, spaced arrangement: the spacing between the fiber bundle pulleys is adjusted so that each fiber bundle is 2 mm apart. The three eccentric wheels P1, P2, and P3 simultaneously move the fiber bundle up and down along the Z-axis. Each up-and-down movement of the eccentric wheel corresponds to one laying operation by the shuttle. Cross-gap arrangement: Keeping the fiber bundle spacing constant at 2 mm, adjust the eccentric wheels P1, P2, and P3 to move individually. After P1 moves downward, the shuttle drives the fiber bundle to lay it laterally once. P1 returns to its original position, and then P2 moves downward, and the shuttle drives the fiber bundle to lay it a second time. P3 follows the same steps. Finally, four types of weaving structures are prepared.

[0013] S2. Fiber Winding: The continuously output carbon fiber woven fabric from step S1 is guided to the surface of the inner liner of the hydrogen storage tank. The hydrogen storage tank clamp drives the aluminum alloy inner liner of the hydrogen storage tank to rotate, while the weaving tool head moves along a preset path under the coordinated drive of the lead screw track and the moving track, so that the carbon fiber woven fabric tightly covers the surface of the inner liner of the hydrogen storage tank. Specifically, when performing helical winding, the rotational speed of the inner liner of the hydrogen storage tank is 20-120 RPM; when performing circumferential winding, the rotational speed of the inner liner of the hydrogen storage tank is 200-600 RPM; the speed fluctuation is required to be less than ±0.5%.

[0014] S3. Curing and Molding: After winding, an epoxy resin system is prepared. This epoxy resin system is composed of E51 type epoxy resin and a curing agent mixed at a mass ratio of 2:1. The mixed resin system is placed in a defoaming tank for degassing treatment. The defoamed resin is then uniformly coated or impregnated onto the surface of the hydrogen storage tank wrapped with carbon fiber cloth. The resin serves to protect the carbon fibers, fill the gaps between fiber bundles, and bond and cure, ultimately forming a carbon fiber reinforced aluminum alloy hydrogen storage tank composite material shell.

[0015] (III) Beneficial Effects

[0016] The beneficial effects of this invention are:

[0017] This invention effectively solves the problem that the performance of traditional hydrogen storage tanks is limited by the winding angle and the number of layers due to the external carbon fiber winding, thus hindering the expansion of the tank's filling pressure and preventing it from reaching higher pressures. By modifying the carbon fiber weaving structure, drawing inspiration from nature, the performance of the carbon fiber woven fabric is made superior. Without increasing process complexity, the compressive strength and overall performance of the hydrogen storage tank are significantly enhanced, taking into account the excellent properties of both carbon fiber and resin. The preparation device is compatible with subsequent coating processes, is easy to operate, and the resulting hydrogen storage tanks can meet the needs of future hydrogen fuel cell vehicles, large hydrogen storage vehicles, hydrogen transportation devices, and other fields, showing broad application prospects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall device of the winding platform of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of a knitting tool head;

[0020] Figure 3 Comparison of tensile properties of carbon fiber laminates;

[0021] Figure 4 A comparison of the bending properties of carbon fiber laminates;

[0022] Figure 5 A comparison of the impact performance of carbon fiber laminates;

[0023] [Explanation of Labels in the Attached Image]

[0024] Figure 1 1: Winding platform; 2: Hydrogen storage tank clamp; 3: Hydrogen storage tank; 4: Weaving tool head; 5: Lead screw track; 6: Sliding track;

[0025] Figure 2 (a): Eccentric wheel; (b): Sliding shuttle; (c): Carbon fiber bundle wheel. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] This example focuses on a carbon fiber reinforced aluminum alloy hydrogen storage tank. The aluminum alloy hydrogen storage tank is subjected to biomimetic carbon fiber winding, followed by resin casting using a vacuum method, curing, and finally performance testing to investigate the impact of different winding structures on the performance of the hydrogen storage tank. The specific details are as follows:

[0029] Fiber weaving:

[0030] This study uses T300 carbon fiber bundles as the winding material. Each bundle is 2 mm wide, and the arrangement includes both a tight, seamless arrangement and a spaced, flat arrangement. In the tight, seamless arrangement, three eccentric wheels (P1, P2, and P3) simultaneously drive three fiber bundles up and down along the Z-axis at a rate of 40 times per minute, while the sliding shuttle synchronously reciprocates horizontally along the Y-axis. In the spaced arrangement, adjacent longitudinal fiber bundles and adjacent transverse fiber bundles maintain a gap of approximately 2 mm (the width of one fiber bundle), forming a regular, mesh-like hollow structure. Longitudinal carbon fiber bundles are drawn from five carbon fiber bundle wheels and pass through eccentric wheels spaced 2 mm apart; transverse carbon fiber bundles are pulled by sliding shuttles spaced 2 mm apart. The three eccentric wheels pull the three longitudinal fiber bundles up and down along the Z-axis at a rate of 40 times per minute, while the sliding shuttle synchronously reciprocates horizontally along the Y-axis, achieving warp and weft interlacing. Each bundle of carbon fiber is woven into a continuous carbon fiber woven fabric with a regular mesh gap at the tool head exit.

[0031] Fiber winding:

[0032] A combination of helical and circumferential winding methods is employed. First, helical winding is performed to lay the main load-bearing layer; finally, circumferential winding is performed to provide circumferential reinforcement. During the helical winding stage, the inner tank rotation speed is set to 60 RPM, and the tool head feed speed is 12 mm / s. In the circumferential winding stage, the speed is increased to 400 RPM, and the tool head feed speed is 1.5 mm / s to guide the woven fabric output from the weaving tool head to the predetermined starting position on the tank surface. The winding program is then initiated, and the equipment automatically operates according to the above parameters until the designed number of layers and thickness are achieved.

[0033] Curing and molding:

[0034] After the winding is completed, immediately prepare the epoxy resin system. Weigh E51 epoxy resin and curing agent at a mass ratio of 2:1 and mechanically stir for 5 minutes. Place the mixed resin in a vacuum defoaming tank to defoam, and use a combination of scraping and rolling to evenly apply the defoamed resin to the surface of the winding layer and the fiber gaps. Place the product in a curing oven and perform a stepped temperature increase curing process of 80°C / 8 hours + room temperature / 2 hours.

[0035] Performance analysis of carbon fiber reinforced aluminum alloy composites prepared under the above preparation conditions:

[0036] The carbon fiber resin laminate formed on the hydrogen storage tank was cut and made into standard samples for tensile testing, three-point bending testing and impact testing.

[0037] Three carbon fiber laminates of each structure were prepared, and each was subjected to different performance tests. In the tensile test, the laminate strength, from strongest to weakest, was determined by alternating lay-up, then lay-up, and so on. Figure 3 As shown, the flat-lay, spaced carbon fiber arrangement exhibits higher performance, with a tensile strength of 71.45 MPa for the interstitial arrangement, representing a 51.01% improvement over the traditional dense carbon fiber arrangement. This demonstrates a significant improvement in tensile properties compared to the traditional ply structure. Figure 4 As shown, by testing four types of laminates in a three-point bending test, the compressive strength of two different laminate structures was obtained. The flat-lay interleaved arrangement still showed superior performance, with a compressive strength reaching 190 MPa. The traditional laying structure still has room for improvement. The denser flat-lay structure showed a 15.25% improvement in interleaved arrangement performance, while maintaining the same compressive strength. Figure 5 As shown, impact tests were conducted on two samples, yielding impact resistance performance for two different structures. The conclusions were consistent with the aforementioned performance patterns, showing a 57.14% improvement in impact resistance compared to the traditional structure. These conclusions demonstrate that the wound biomimetic structure exhibits a significant performance improvement over the traditional laid-out structure, indicating the feasibility and high reliability of the proposed winding method and device.

[0038] Example 2

[0039] This example focuses on a carbon fiber reinforced aluminum alloy hydrogen storage tank. The aluminum alloy hydrogen storage tank is subjected to biomimetic carbon fiber winding, followed by resin casting using a vacuum method, curing, and finally performance testing to investigate the impact of different winding structures on the performance of the hydrogen storage tank. The specific details are as follows:

[0040] Fiber weaving:

[0041] This study uses T300 carbon fiber bundles as the winding material, with each bundle being 2 mm wide. The arrangement structures are a flat, tightly interlaced layout and a cross-interval layout. In the flat, tightly interlaced layout, three eccentric wheels (P1, P2, and P3) move independently. P1 first moves the fiber bundle along the Z-axis, while the sliding shuttle moves along the Y-axis. After P1 returns to its original position, P2 immediately moves along the Z-axis, and the shuttle begins weaving again. P3 follows the same process. In the cross-interval layout, a gap of approximately 2 mm (one fiber bundle width) is maintained between adjacent longitudinal fiber bundles and between adjacent transverse fiber bundles, forming a regular, mesh-like hollow structure. The longitudinal carbon fiber bundles are drawn from five carbon fiber bundle wheels and pass through eccentric wheels spaced 2 mm apart. The transverse carbon fiber bundles are pulled by sliding shuttles spaced 2 mm apart. The P1 eccentric wheel pulls the fiber bundle up and down along the Z-axis at a rate of 40 times per minute, while the sliding shuttle performs a synchronous horizontal reciprocating motion. After P1 returns to its original position, P2 and P3 weave according to the above steps, achieving warp and weft interlacing. A single bundle of carbon fiber is woven into a continuous carbon fiber woven fabric with regular grid gaps at the tool head exit.

[0042] Fiber winding:

[0043] A combination of helical and circumferential winding methods is employed. First, helical winding is performed to lay the main load-bearing layer; finally, circumferential winding is performed to provide circumferential reinforcement. During the helical winding stage, the inner tank rotation speed is set to 60 RPM, and the tool head feed speed is 12 mm / s. In the circumferential winding stage, the speed is increased to 400 RPM, and the tool head feed speed is 1.5 mm / s to guide the woven fabric output from the weaving tool head to the predetermined starting position on the tank surface. The winding program is then initiated, and the equipment automatically operates according to the above parameters until the designed number of layers and thickness are achieved.

[0044] Curing and molding:

[0045] After the winding is completed, immediately prepare the epoxy resin system. Weigh E51 epoxy resin and curing agent at a mass ratio of 2:1 and mechanically stir for 5 minutes. Place the mixed resin in a vacuum defoaming tank to defoam, and use a combination of scraping and rolling to evenly apply the defoamed resin to the surface of the winding layer and the fiber gaps. Place the product in a curing oven and perform a stepped temperature increase curing process of 80°C / 8 hours + room temperature / 2 hours.

[0046] Performance analysis of carbon fiber reinforced aluminum alloy composites prepared under the above preparation conditions:

[0047] The carbon fiber resin laminate formed on the hydrogen storage tank was cut and made into standard samples for tensile testing, three-point bending testing and impact testing.

[0048] Three carbon fiber laminates of each structure were prepared, and each was subjected to different performance tests. In the tensile test, the laminate strength, from strongest to weakest, was determined by alternating lay-up, then lay-up, and so on. Figure 3 As shown, the flat-lay, spaced carbon fiber arrangement exhibits higher performance, with a tensile strength of 115.76 MPa, representing a 51.88% improvement over the traditional dense carbon fiber arrangement. This demonstrates a significant improvement in tensile properties compared to the traditional ply structure. Figure 4 As shown, by testing four types of laminates in a three-point bending test, the compressive strength of two different laminate structures was obtained. The flat-lay interleaved arrangement still showed superior performance, achieving a compressive strength of 239 MPa. The traditional laying structure still has room for improvement. The denser flat-lay structure showed a 30.12% improvement in interleaved performance, while maintaining the same compressive strength. Figure 5 As shown, impact tests were conducted on two samples, yielding impact resistance performance for two different structures. The conclusions were consistent with the aforementioned performance patterns, showing a 66.66% improvement in impact resistance compared to the traditional structure. These conclusions demonstrate that the wound biomimetic structure exhibits a significant performance improvement over the traditional laid-out structure, indicating the feasibility and high reliability of the proposed winding method and device.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the patent. Any simple modifications or equivalent transformations made by those skilled in the art based on the content of the present invention, or any direct or indirect applications in other related technical fields, are all included within the scope of patent protection of the present invention.

Claims

1. A biomimetic winding device for a carbon fiber reinforced aluminum alloy hydrogen storage tank, characterized in that, The system includes a winding platform, a hydrogen storage tank clamp, a braiding tool head, a lead screw track, and a moving track. The hydrogen storage tank clamp is mounted on the winding platform and is used to hold and drive the inner liner of the aluminum alloy hydrogen storage tank to rotate. The braiding tool head is located on one side of the hydrogen storage tank clamp and is connected to the lead screw track and the moving track via a slider. The lead screw track drives the braiding tool head to move in a direction parallel to the axis of the hydrogen storage tank, while the moving track drives the braiding tool head to move in a direction perpendicular to the axis of the hydrogen storage tank and can adjust the angle of the braiding tool head relative to the surface of the hydrogen storage tank in real time.

2. The winding device as described in claim 1 can achieve "integrated weaving and winding". The overall structure includes a lead screw track, a weaving tool head, and a sliding track. Driven by the machine, the hydrogen storage tank can rotate. The weaving tool head can adjust its angle on the lead screw track and move up and down on the sliding track to achieve fiber bundle weaving around the hydrogen storage tank. The spiral winding speed of the hydrogen storage tank is 20-120 RPM, the circumferential winding speed is 200-600 RPM, and the speed fluctuation is required to be less than ±0.5%.

3. The weaving tool head device as described in claim 1, the internal structure includes a carbon fiber bundle wheel, an eccentric pulley (P1, P2, P3 from the inside out), and a sliding shuttle. Driven by the eccentric wheel, the carbon fiber bundle moves up and down, and the sliding shuttle pulls the carbon fiber bundle to move laterally. The weaving speed is 20-60 times / minute, which can realize online weaving of carbon fiber cloth with a specific gap arrangement (bionic hollow structure) and immediate winding.

4. A method for preparing a carbon fiber biomimetic wound reinforced aluminum alloy hydrogen storage tank, characterized in that, The preparation apparatus according to any one of claims 1-3 comprises the following steps: S1. Fiber Weaving: Inside the weaving tool head, a carbon fiber bundle wheel supplies longitudinal fiber bundles, which move alternately up and down under the drive of an eccentric wheel assembly. Simultaneously, transverse fiber bundles move laterally through each other under the drive of a sliding shuttle, spontaneously weaving multiple independent carbon fiber bundles into a continuous carbon fiber woven fabric with a predetermined arrangement structure inside the tool head. The weaving speed is 20-60 times / minute. The woven carbon fiber fabric is continuously output from the output end of the weaving tool head. Based on biomimetic design requirements, the arrangement structure of the carbon fiber woven fabric was selected. The arrangement structure includes a flat, densely packed arrangement; a flat, cross-densely packed arrangement; a flat, spaced arrangement; and a cross-densely packed arrangement. For the flat, densely packed arrangement: pulleys P1, P2, and P3 simultaneously move the fiber bundle up and down along the Z-axis, changing the shuttle angle to 30° with the X-axis. Each time the eccentric wheel moves up and down, the shuttle lays the fiber bundle along the Y-axis once. For the flat, cross-densely packed arrangement: adjust the eccentric wheels P1, P2, and P3 to move independently. After P1 moves downward, the shuttle drives the fiber bundle to lay it horizontally along the Y-axis once. P1 returns to its original position, then P2 moves downward, and the shuttle drives the fiber bundle to lay it a second time. P3 follows the same steps to achieve a cross-densely packed arrangement of the fiber bundles. For the flat, spaced arrangement: adjust the spacing between the fiber bundle pulleys so that each fiber bundle is 2mm apart. The three eccentric wheels P1, P2, and P3 simultaneously move the fiber bundle up and down along the Z-axis. Each time the eccentric wheel moves up and down, the shuttle lays the fiber bundle along the Y-axis once. Cross gap arrangement: Keep the fiber bundle spacing constant at 2mm, adjust the eccentric wheels P1, P2, and P3 to move independently. After P1 moves downward, the shuttle drives the fiber bundle to lay it horizontally along the Y-axis once. P1 returns to its original position, and then P2 moves downward, and the shuttle drives the fiber bundle to lay it a second time. P3 adopts the same movement mode, and finally the preparation of four weaving structures is achieved. S2. Fiber Winding: The continuously output carbon fiber woven fabric from step S1 is guided to the surface of the inner liner of the hydrogen storage tank. The hydrogen storage tank clamp drives the aluminum alloy inner liner of the hydrogen storage tank to rotate, while the weaving tool head moves along a preset path under the coordinated drive of the lead screw track and the moving track, so that the carbon fiber woven fabric tightly covers the surface of the inner liner of the hydrogen storage tank. Specifically, when performing spiral winding, the rotational speed of the inner liner of the hydrogen storage tank is 20-120 RPM; when performing circumferential winding, the rotational speed of the inner liner of the hydrogen storage tank is 200-600 RPM; the speed fluctuation is required to be less than ±0.5%. S3. Curing and Molding: After winding, prepare the epoxy resin system. The epoxy resin system is composed of E51 type epoxy resin and curing agent mixed at a mass ratio of 2:

1. Place the mixed resin system in a defoaming tank for degassing treatment. The degassed resin is then evenly coated or impregnated onto the surface of the hydrogen storage tank that has been wound with carbon fiber cloth. The resin serves to protect the carbon fibers, fill the gaps between fiber bundles, and bond and cure, ultimately forming the carbon fiber reinforced aluminum alloy hydrogen storage tank composite material shell.

5. The biomimetic winding method for carbon fiber reinforced aluminum alloy hydrogen storage tanks as described in claim 4, characterized in that, Traditional winding involves winding a single bundle of carbon fiber onto a hydrogen storage tank, while this design involves wrapping the tank with woven carbon fiber cloth.

6. The method for preparing a carbon fiber reinforced aluminum alloy hydrogen storage tank as described in claim 4, characterized in that, By changing the spacing between the eccentric wheels inside the weaving tool head, the spacing between the fiber bundles is altered. Compared with the traditional tightly packed arrangement, a hollow structure is formed, which can effectively enhance performance and realize the biomimetic winding preparation of carbon fiber reinforced aluminum alloy hydrogen storage tanks.

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