Flexible solar wing substrate structure and preparation process

Abstract

The invention provides a flexible solar wing substrate structure and a preparation process, and belongs to the technical field of spacecraft power supply subsystems. The flexible solar wing substrate structure comprises a polyimide film layer, a flexible circuit board and at least one flexible substrate reinforcing layer made of a fiber reinforced polymer matrix composite material. The components are integrally formed through co-curing, and the flexible circuit board is embedded in the polyimide base material and has the functions of flexibility and circuit communication; the edge of the substrate is pre-bent to form a flexible hinge with a round rod, so that the folding reliability is improved; and a co-cured fiber composite reinforcing sheet can be selectively arranged to enhance the structural strength. The structure is light in weight, thin in thickness and suitable for a large-interval cold and hot circulation space environment, the manufacturing process is remarkably simplified, the size and the mass are reduced, the folding service life of the spacecraft solar wing is prolonged, and the structural stability is enhanced.

Description

Flexible solar panel substrate structure and fabrication process Technical Field

[0001] This invention belongs to the field of spacecraft power subsystem technology, specifically, it relates to a flexible solar panel substrate structure and its fabrication process, and in particular, a highly integrated, one-piece molded foldable flexible solar panel substrate structure and its fabrication process. Background Technology

[0002] As a core power component of spacecraft, flexible solar panels require substrates that meet the requirements of lightweight, high foldability, high reliability, and adaptability to the space environment. Existing foldable flexible solar panel substrates mostly adopt a split design and molding process. Flexible hinges and hanging points need to be molded separately and connected to the substrate body through a secondary adhesive bonding process. The circuits also need to be set separately on the back of the substrate, resulting in many redundant processes or the following defects: (1) Split assembly leads to gaps between components, affecting the overall performance of the structure. In the high and low temperature alternation and high vacuum environment of space, failures such as debonding and bulging are likely to occur; (2) There are many assembly steps, resulting in low production efficiency. The additional connection structure increases the weight of the substrate, which is not conducive to spacecraft payload optimization and launch cost control; (3) The connection between the flexible hinge and the substrate body is a stress concentration area. During repeated folding in the ground test stage, fatigue damage is likely to occur, affecting the life of the solar panel. Therefore, it is urgent to develop a highly integrated, one-piece flexible solar panel substrate structure to improve the reliability and lightweight level of the substrate by simplifying the structural design and manufacturing process.

[0003] Currently, relevant existing technologies include: Chinese patent application CN111969939A, which discloses a substrate assembly structure suitable for flexible solar panels. Each substrate assembly structure includes a flexible substrate, hinges, reinforcing strips, and hanging support rings. Hanging support rings are fixed on opposite sides of the flexible substrate, and hinges are fixed on the other two sides. Reinforcing strips are installed on both sides of the hinges. The flexible substrate has a planar structure and is symmetrical in cross-section. The middle layer is a reinforcing layer, and the upper and lower layers near the reinforcing layer are adhesive layers. A polyimide film layer is located outside the adhesive layer, and the adhesive layer bonds the reinforcing layer and the polyimide film layer together. Multiple substrate assemblies are connected by a mandrel inserted through the hinges. While this technical solution provides a feasible flexible solar panel substrate solution, its modular assembly makes the overall structure prone to failure, and the manufacturing process is more complex. Furthermore, this technical solution requires additional cables to realize the solar panel circuitry, which increases the complexity of the preparation and installation processes and is detrimental to meeting the lightweight requirements of solar panels. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a flexible solar panel substrate structure and its fabrication process.

[0005] The flexible solar panel substrate structure provided by the present invention includes: a polyimide film layer, a flexible circuit board, and at least one flexible substrate reinforcement layer; one side of the flexible substrate reinforcement layer is provided with a flexible circuit board to connect the solar panel circuit structure, and the other side is a polyimide film layer formed by bonding a polyimide film with a polyimide film using a co-curing process; the flexible substrate reinforcement layer is made of fiber-reinforced polymer-based composite material, and the flexible circuit board has embedded circuitry with polyimide as the substrate.

[0006] Preferably, the thickness of the polyimide film layer is , , , At least one of them.

[0007] Preferably, the flexible circuit board is made of a polyimide flexible substrate, with a printed circuit layer or an etched circuit embedded in the middle of the polyimide flexible substrate, and the circuit interface of the flexible circuit board extends to a predetermined area at the edge of the substrate.

[0008] Preferably, the thickness of the flexible substrate reinforcement layer is 0.05 mm to 0.3 mm; the fiber-reinforced polymer matrix composite material used to prepare the flexible substrate reinforcement layer is at least one of the following: a stable woven fabric, a twill woven fabric, a quasi-isotropic lay-up fabric, and a mesh fabric.

[0009] Preferably, the base fiber of the fiber-reinforced polymer matrix composite material is at least one of carbon fiber, glass fiber, polyimide fiber, and Vectran fiber; and the polymer is at least one of epoxy resin, cyanate ester resin, acrylic resin, polyimide resin, bismaleimide resin, and phenolic resin.

[0010] Preferably, the quasi-isotropic layup is obtained by quasi-isotropic layup of fiber-reinforced polymer-based unidirectional prepreg or prepreg tape.

[0011] Preferably, the mesh fabric is obtained by wet or dry winding of fiber bundles, and the gap between the fiber bundles during wet or dry winding is [missing information]. , , , , , At least one of the different permutations and combinations.

[0012] Preferably, the edge of the flexible solar panel substrate structure is rolled and bent along the folding direction of the flexible solar panel substrate during the prepreg stage to form a cylindrical structure of 1 to 2 mm, which is then co-cured to form a flexible hinge; the cylindrical structure is provided with a stainless steel rod or a polytetrafluoroethylene rod with a diameter adapted to the diameter of the cylinder.

[0013] A fabrication process for a flexible solar panel substrate structure according to the present invention is characterized by comprising: Step S1: cutting a prepreg laminate and a polyimide film for prefabricating at least one layer of flexible substrate reinforcement layer according to a design drawing; Step S2: stacking the cut prepreg laminates of the flexible substrate reinforcement layer sequentially; Step S3: laying the polyimide film and a flexible circuit board respectively to form a primary prefabricated substrate; Step S4: bending the prepreg edge of the primary prefabricated substrate in the folding direction with a diameter of 1 mm to 2 mm to form a circle. A flexible hinge with a cylindrical structure is formed by setting stainless steel or polytetrafluoroethylene rods of corresponding diameter in the formed cylindrical structure to form a secondary prefabricated substrate; Step S5: The secondary prefabricated substrate is placed in the tooling, and the rods at the flexible hinge are stuck in the corresponding grooves and other limiting structures set in the tooling. A vacuum laminator is used to apply 0.3 to 0.5 MPa, and the substrate is kept at 180 to 200°C for 30 to 60 minutes to complete the curing; Step S6: After curing, the edges are trimmed and the whole is processed to obtain the finished flexible solar panel substrate structure.

[0014] A fabrication process for a flexible solar panel substrate structure according to the present invention is characterized by comprising: Step SF1: Laying a 0.05mm thick polyimide film on the plain surface of EW200 / 1006 glass fiber reinforced epoxy resin prepreg, and cutting the outline using a composite material cutting machine to obtain a first reinforcing layer assembly; Step SF2: Stacking two layers of EW200 / 1006 glass fiber reinforced epoxy resin prepreg, and cutting the outline using a composite material cutting machine to obtain a second reinforcing layer assembly; Step SF3: Cutting additional reinforcing sheets using a composite material cutting machine, without cutting holes at this stage, only cutting the outline dimensions; Step SF4: Using the short sides of the first and second reinforcing layer assemblies obtained in steps SF1 and SF2 as a reference, laying the second reinforcing layer assembly on the non-adhesive polyimide film surface of the first reinforcing layer assembly, and then laying the reinforcing sheets on the edge of the second reinforcing layer assembly to obtain a flexible substrate reinforcement. Step SF5: The edge of the flexible substrate reinforcement layer is bent to form a flexible hinge, and a 1.5mm polytetrafluoroethylene rod is inserted into the circular hole of the formed flexible hinge; Step SF6: The flexible circuit board is pasted on the glass fiber prepreg fabric surface of the flexible substrate reinforcement layer to form a secondary prefabricated substrate; Step SF7: The secondary prefabricated substrate obtained in step SF6 is placed in a mold, and the polytetrafluoroethylene rod at the flexible hinge is stuck in the groove of the mold; Step SF8: Release material and buffer material are sequentially laid on the surface of the mold, and the whole is placed in a vacuum laminator for pressing. The pressing temperature is 180°C, the pressing time is 30min, and the pressing pressure is 0.5MPa; Step SF9: After pressing, the release material and buffer material are removed, the finished flexible solar panel substrate is taken out of the mold, and the polytetrafluoroethylene rod is pulled out; Step SF10: The residual adhesive on the edge is cleaned, and the hanging circular holes at both ends of the finished flexible solar panel substrate are processed; The reinforcing sheet in step SF3 is made of fiber reinforced composite material.

[0015] Compared with existing technologies, the present invention has the following beneficial effects: 1. The present invention uses co-curing integral molding to produce a flexible solar panel substrate structure. Compared with the traditional split structure, it can eliminate the connection gaps between the split components, improve the integrity and rigidity of the substrate structure, and significantly improve the stability in the space environment; 2. The present invention achieves high overall integration of the structure through co-curing and direct prefabrication of flexible circuit boards. Furthermore, by eliminating additional connection structures and adhesives, the substrate weight is reduced by 15% to 20% compared with the traditional split structure, greatly reducing the total amount of the substrate and facilitating the overall lightweighting of the solar panel; 3. The manufacturing process of the flexible solar panel substrate produced by the present invention is greatly simplified, and the production efficiency is increased by more than 70%, effectively reducing the manufacturing cost; 4. The flexible solar panel substrate structure of the present invention can provide installation positions for different types of solar cells, interconnects, busbars, electronic components, etc. through subsequent steps such as drilling, bearing the loads during satellite launch and on-orbit operation, ensuring that the circuits and related components are not damaged. By combining flexibility and strength, it is not prone to fatigue damage at a low cost. The integrated structure has strong resistance to the space environment and can meet the requirements of long-life on-orbit operation of spacecraft. Attached Figure Description

[0016] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 is a schematic diagram of the structure of the flexible solar panel substrate of the present invention; Figure 2 is a schematic diagram of the formation of the flexible hinge of the present invention; Figure 3 is a schematic diagram of the structure of the reinforcing layer of the present invention; Figure 4 is a schematic diagram of the curing mold of the flexible substrate of the present invention.

[0017] The figure shows: flexible substrate reinforcement layer 1; polyimide film layer 2; flexible circuit board 3; flexible hinge 4; reinforcing sheet 5. Detailed Implementation

[0018] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0019] As shown in Figures 1 and 2, this embodiment of the invention provides a flexible solar panel substrate structure, including: a polyimide film layer 2, a flexible circuit board 3, and at least one flexible substrate reinforcement layer 1; one side of the flexible substrate reinforcement layer 1 is provided with the flexible circuit board 3 to connect solar panel circuit structures such as battery cells, and the other side is formed by bonding the polyimide film layer 2 to the polyimide film using a co-curing process; further, the flexible substrate reinforcement layer 1 is made of a fiber-reinforced polymer-based composite material with a thickness of 0.05 mm to 0.3 mm; the fiber-reinforced polymer-based composite material is in the form of at least one of a stable woven fabric, a twill woven fabric, a quasi-isotropic layup fabric, and a mesh fabric; specifically, the quasi-isotropic layup is obtained by quasi-isotropic layup of fiber-reinforced polymer-based unidirectional prepreg or prepreg tape; the mesh fabric is obtained by wet or dry winding of fiber bundles, and the gap between the fiber bundles during wet or dry winding is... , , , , , At least one of different arrangements and combinations thereof; the base fiber of the fiber-reinforced polymer matrix composite material is at least one of carbon fiber, glass fiber, polyimide fiber, and Vectran fiber, and the polymer is at least one of epoxy resin, cyanate ester resin, acrylic resin, polyimide resin, bismaleimide resin, and phenolic resin; the thickness of the above-mentioned polyimide film layer 2 is , , , At least one of the following: The flexible circuit board 3 is made of a polyimide flexible substrate, with a printed circuit layer or etched circuit embedded in the middle of the polyimide flexible substrate. Its circuit interface extends to a predetermined area at the edge of the substrate and is set on the side of the flexible substrate reinforcing layer 1 where the battery cell is attached using a co-curing process. This allows the flexible circuit board 3 to integrate the flexible properties of the polyimide film and the function of circuit connection, greatly reducing the overall weight and structural complexity of the solar panel and simplifying the battery cell circuit connection process. Specifically, the flexible circuit board 3 is a highly reliable and flexible printed circuit board made of polyimide film as the substrate, with embedded flat circuits, which can be used as an electrical signal transmission carrier.

[0020] Furthermore, the edge of the aforementioned flexible solar panel substrate structure is curled and bent along the folding direction of the flexible solar panel substrate during the prepreg stage to form a cylindrical structure of 1 to 2 mm, as shown in Figure 2. After co-curing, a flexible hinge 4 is formed. Further, a stainless steel or polytetrafluoroethylene rod with a diameter matching the cylinder diameter is provided in the aforementioned cylindrical structure. Specifically, the aforementioned flexible hinge 4 is arranged along the folding axis of the finished flexible solar panel substrate. In a more specific embodiment, due to the substrate material, the flexible hinge 4 is actually a flexible composite structure of polyimide film and glass fiber composite material.

[0021] It is worth noting that the aforementioned flexible substrate reinforcement layer 1, flexible circuit board 3, and flexible hinge 4 are integrally formed through co-curing. The co-curing process used in this invention achieves synchronous curing of each component through a process of pre-formed body assembly, mold pressure curing, and post-processing, simplifying the manufacturing process and ensuring structural integrity. Through this co-curing process, this invention effectively avoids defects such as substrate debonding and bulging in a spatial environment.

[0022] Furthermore, when forming an integral flexible solar panel substrate structure, reinforcing sheets 5 can be added to the edge of the structure to enhance the overall strength of the structure. These reinforcing sheets 5 are integrally formed by co-curing fiber-reinforced composite materials with the substrate structure body. More specifically, the aforementioned reinforcing sheets 5 are arranged along the short side of the substrate and are multi-layered structures of polyimide film and fiber composite materials.

[0023] This invention also provides a fabrication process for a flexible solar panel substrate structure, comprising: Step S1: cutting a prepreg laminate and a polyimide film for at least one layer of flexible substrate reinforcement layer 1 according to a design drawing; Step S2: stacking the cut prepreg laminates of the flexible substrate reinforcement layer 1 sequentially; Step S3: laying the polyimide film and the flexible circuit board 3 respectively to form a primary prefabricated substrate; Step S4: bending the prepreg edge of the primary prefabricated substrate in the folding direction with a diameter of 1 mm to 2 mm to form a cylindrical shape. The flexible hinge 4 of the structure is formed by setting stainless steel or polytetrafluoroethylene round bars of corresponding diameter in the cylindrical structure to form a secondary prefabricated substrate; Step S5: The secondary prefabricated substrate is placed in the mold or other tooling as shown in Figure 4. The round bars at the flexible hinge 4 are stuck in the corresponding grooves or other limiting structures of the tooling. A vacuum laminator is used to apply 0.3 to 0.5 MPa and the substrate is kept at 180 to 200°C for 30 to 60 minutes to complete the curing; Step S6: After curing, the edges are trimmed and the whole structure is processed to obtain the finished flexible solar panel substrate structure.

[0024] The invention will now be further described with reference to a more specific embodiment. The flexible solar panel substrate structure suitable for a foldable collapsible configuration, obtained according to the more detailed manufacturing process of this embodiment, is shown in Figure 1. It serves as a carrier for solar cell circuits. The manufacturing process of this embodiment specifically includes: Step SF1: A 0.05mm thick polyimide film is laid on the plain weave surface of EW200 / 1006 glass fiber reinforced epoxy resin prepreg. Using a composite material cutting machine, the shape of the first reinforcing layer assembly is cut according to the shape shown in Figure 2 to obtain the first reinforcing layer assembly; Step SF2: Two layers of EW200 / 1006 glass fiber reinforced epoxy resin prepreg are stacked and laid out. Using a composite material cutting machine, the shape of the second reinforcing layer assembly is cut according to the shape shown in Figure 2 to obtain the second reinforcing layer assembly; Step SF3: Using a composite material cutting machine, the reinforcing sheet 5 shown in Figure 1 is cut. Holes are not cut here; only the outer dimensions are cut; Step SF4: Using the short sides of the first and second reinforcing layer assemblies as a reference, the second reinforcing layer assembly is laid on... The non-adhesive polyimide film surface of the first reinforcing layer assembly is then covered with reinforcing sheet 5 at the edge position shown in Figure 1 to obtain flexible substrate reinforcing layer 1; Step SF5: The edge of flexible substrate reinforcing layer 1 is bent to form flexible hinge 4, and a 1.5mm polytetrafluoroethylene rod is inserted into the circular hole of the formed flexible hinge 4; Step SF6: Flexible circuit board 3 is adhered to the glass fiber prepreg surface of flexible substrate reinforcing layer 1 to form secondary prefabricated substrate; Step SF7: The secondary prefabricated substrate obtained in step SF6 is placed in the mold shown in Figure 3, and... The PTFE rods at the four flexible hinges are stuck in the mold grooves; Step SF8: Lay release material and cushioning material on the mold surface in sequence, put the whole into a vacuum laminator for pressing, the pressing temperature is 180°C, the pressing time is 30min, and the pressing pressure is 0.5MPa; Step SF9: After pressing, remove the release material and cushioning material, take out the finished flexible solar panel substrate from the mold, and pull out the PTFE rods; Step SF10: Clean the residual adhesive on the edges, and process the hanging round holes at the left and right ends according to the schematic diagram shown in Figure 1.

[0025] The highly integrated, one-piece molded foldable flexible solar panel substrate obtained through the above steps has a thickness of 0.3 mm in the area where the solar cells are attached and a weight of approximately 0.4 kg / m², which is about 18% lighter than traditional split substrates. to It exhibits excellent structural stability under high and low temperature thermal cycling conditions.

[0026] In summary, this invention, through integrated design and manufacturing, eliminates redundant gap control during separate adhesive bonding assembly, significantly reduces the weight and volume of the solar panel substrate, improves folding reliability, simplifies the manufacturing process, and is suitable for flexible solar panels for spacecraft with long lifespan and high folding cycle requirements.

[0027] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A flexible solar panel substrate structure, characterized in that, include: The flexible substrate reinforcement layer (1) consists of a polyimide film layer (2), a flexible circuit board (3), and at least one flexible substrate reinforcement layer (1). One side of the flexible substrate reinforcement layer (1) is provided with a flexible circuit board (3) to connect the solar panel circuit structure, and the other side is bonded with a polyimide film layer (2) formed by a co-curing process. The flexible substrate reinforcement layer (1) is made of fiber-reinforced polymer-based composite material, and the flexible circuit board (3) has a polyimide substrate with embedded circuitry.

2. The flexible solar panel substrate structure according to claim 1, characterized in that, The thickness of the polyimide film layer (2) is 、 、 、 At least one of them.

3. The flexible solar panel substrate structure according to claim 1, characterized in that, The flexible circuit board (3) is made of polyimide flexible substrate, with printed circuit layer or etched circuit embedded in the middle of polyimide flexible substrate, and the circuit interface of the flexible circuit board (3) extends to a preset area at the edge of the substrate.

4. The flexible solar panel substrate structure according to claim 1, characterized in that, The thickness of the flexible substrate reinforcement layer (1) is 0.05 mm to 0.3 mm; the fiber-reinforced polymer matrix composite material used to prepare the flexible substrate reinforcement layer (1) is at least one of the following: a stable woven fabric, a twill woven fabric, a quasi-isotropic lay-up fabric, and a mesh fabric.

5. The flexible solar panel substrate structure according to claim 4, characterized in that, The base fiber of the fiber-reinforced polymer matrix composite material is at least one of carbon fiber, glass fiber, polyimide fiber, and Vectran fiber; the polymer is at least one of epoxy resin, cyanate ester resin, acrylic resin, polyimide resin, bismaleimide resin, and phenolic resin.

6. The flexible solar panel substrate structure according to claim 5, characterized in that, The quasi-isotropic layup is obtained by quasi-isotropic layup of fiber-reinforced polymer-based unidirectional prepreg or prepreg tape.

7. The flexible solar panel substrate structure according to claim 5, characterized in that, The mesh fabric is obtained by wet or dry winding of fiber bundles, and the gap between the fiber bundles during wet or dry winding is... 、 、 、 、 、 At least one of the different permutations and combinations.

8. The flexible solar panel substrate structure according to claim 5, characterized in that, The edge of the flexible solar panel substrate structure is rolled and bent along the folding direction of the flexible solar panel substrate during the prepreg stage to form a cylindrical structure of 1 to 2 mm, which is then co-cured to form a flexible hinge (4); the cylindrical structure is provided with a stainless steel rod or a polytetrafluoroethylene rod with a diameter adapted to the diameter of the cylinder.

9. A fabrication process for a flexible solar panel substrate structure according to any one of claims 1 to 8, characterized in that, include: Step S1: Cut the prepreg laminate and polyimide film of at least one flexible substrate reinforcement layer (1) according to the design drawings; Step S2: Stack the prepreg laminates of the cut flexible substrate reinforcement layer (1) in sequence; Step S3: Lay out polyimide film and flexible circuit board (3) to form primary prefabricated substrate; Step S4: Bend the prepreg edge of the primary prefabricated substrate in the folding direction with a diameter of 1 mm to 2 mm to form a flexible hinge (4) in a cylindrical structure, and set a stainless steel or polytetrafluoroethylene rod of the corresponding diameter in the formed cylindrical structure to form a secondary prefabricated substrate; Step S5: Place the secondary prefabricated substrate into the fixture, and the rod at the flexible hinge (4) is stuck in the corresponding groove and other limiting structure of the fixture. Apply 0.3 to 0.5 MPa using a vacuum laminator and keep it at 180 to 200°C for 30 to 60 minutes to complete the curing; Step S6: After curing, perform edge trimming and overall processing to obtain the finished flexible solar panel substrate structure.

10. A fabrication process for a flexible solar panel substrate structure according to any one of claims 1 to 8, characterized in that, include: Step SF1: Lay a 0.05mm thick polyimide film on the plain surface of EW200 / 1006 glass fiber reinforced epoxy resin prepreg, and cut the shape using a composite material cutting machine to obtain the first reinforcing layer assembly; Step SF2: Stack two layers of EW200 / 1006 glass fiber reinforced epoxy resin prepreg, and cut the shape using a composite material cutting machine to obtain the second reinforcing layer assembly; Step SF3: Cut the additional reinforcing sheet (5) using a composite material cutting machine. Do not cut the hole here, only cut the outer dimensions; Step SF4: Using the short sides of the first and second reinforcing layer assemblies obtained in steps SF1 and SF2 as a reference, lay the second reinforcing layer assembly on the non-adhesive polyimide film surface of the first reinforcing layer assembly, and then lay the reinforcing sheet (5) on the edge of the second reinforcing layer assembly to obtain the flexible substrate reinforcing layer (1); Step SF5: Bend the edge of the flexible substrate reinforcing layer (1) A flexible hinge (4) is formed, and a 1.5mm polytetrafluoroethylene rod is inserted into the round hole of the flexible hinge (4); Step SF6: The flexible circuit board (3) is pasted on the glass fiber prepreg fabric of the flexible substrate reinforcement layer (1) to form a secondary prefabricated substrate; Step SF7: The secondary prefabricated substrate obtained in step SF6 is placed in the mold, and the polytetrafluoroethylene rod at the flexible hinge (4) is stuck in the mold groove; Step SF8: Release material and buffer material are sequentially laid on the surface of the mold, and the whole is placed in a vacuum laminator for pressing. The pressing temperature is 180°C, the pressing temperature is 30min, and the pressing pressure is 0.5MPa; Step SF9: After pressing, the release material and buffer material are removed, the finished flexible solar wing substrate in the mold is taken out, and the polytetrafluoroethylene rod is pulled out; Step SF10: The edge residual glue is cleaned, and the hanging round holes at both ends of the finished flexible solar wing substrate are processed; The reinforcing sheet (5) in step SF3 is made of fiber reinforced composite material.

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