Battery assembly and sealing structure thereof
Patent Information
- Application Number
- CN202522300321.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-10-30
AI Technical Summary
[0003]本实用新型提供了一种电池组件及其密封结构，以解决现有阻水密封材料无法兼顾工艺简单、成本低以及高效阻水性能的问题
[0007]有益效果：本实用新型中，首先在第一密封件未完全围合时将第一密封件的第一面、第二面和第三面分别与光伏层压件的背面和两侧面贴附在一起，然后通过翻转将第四面与光伏层压件的正面贴附，然后再将第五面覆盖于第三面上，形成整体连接边上全部密封结构，密封性能大大提升。此外，采用丁基胶层成型第一密封件的各组成面，其中丁基胶层两侧均为具有粘接功能的表面，也即具有相对的第一粘接面和第二粘接面，其中第一粘接面朝向容置空间内的光伏层压件，第二粘接面则相对朝外背离光伏层压件，第一密封件最终重叠封口的第五面和第三面，实质上是第三面的丁基胶层的第一粘接面和第五面的丁基胶层的第二粘接面的粘贴，施加一定力确保两部分的丁基胶材料粘合完全，也即第一密封件最终封口处的重叠部分为同一材料的粘合，不会引入更多界面或粘贴边缘高度差，从而实现高效阻水。
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Figure CN224818471U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic technology, specifically to a battery module and its sealing structure. Background Technology
[0002] Heterojunction modules are sensitive to moisture, so water-blocking materials are typically used to seal the photovoltaic laminates first. Common water-blocking materials include butyl tape and aluminum foil tape. Butyl tape requires precise cutting and positioning of the adhesive film in practical applications, resulting in high process requirements and material costs. Aluminum foil tape is simpler and cheaper, but its structure consists of a water-blocking adhesive layer, an aluminum foil layer, and a surface PET layer. Therefore, when sealing the four corners of the module, the adhesive layer of one side of the aluminum foil tape overlaps with the PET layer of the other side. This overlapping area contains multiple layers of different materials, introducing multiple interfaces. This results in unavoidable height differences at the bonding edges due to the different materials, ultimately allowing moisture to enter and affecting the module's reliability. Utility Model Content
[0003] This invention provides a battery assembly and its sealing structure to solve the problem that existing water-blocking sealing materials cannot simultaneously achieve simple processing, low cost, and high water-blocking performance.
[0004] In a first aspect, this utility model provides a sealing structure for a battery module, suitable for being disposed around a photovoltaic laminate, including a first sealing member disposed at a corner of the photovoltaic laminate. The first sealing member includes: a first surface, a second surface, a third surface, a fourth surface, and a fifth surface. The first surface is polygonal and has adjacent first and second sides forming a first included angle, the first included angle being the same as the angle of the corner of the photovoltaic laminate. The second surface is perpendicular to the first surface and has one side connected to the first side of the first surface. The third surface is perpendicular to the first surface and has one side connected to the second side of the first surface. The fourth surface includes a third side and a fourth side forming a second included angle. The third side is connected to the side of the second surface away from the first surface. The fourth surface is adapted to rotate along the third side under the action of an external force so as to be disposed opposite to the first surface in a direction perpendicular to the first surface. The second included angle is equal in size to the first included angle. One side of the fifth surface is connected to the fourth side. When the fourth surface rotates to be disposed opposite to the first surface, the fifth surface is adapted to be adhered to the third surface under the action of an external force. The third surface and the fifth surface at least partially overlap.
[0005] Beneficial effects: The sealing structure of this utility model includes a first sealing element disposed at the corner of the photovoltaic laminate. The first sealing element includes five sealing surfaces that are partially movable and have a folding function. The structure is simple and easy to manufacture. Each sealing surface and different surfaces of the photovoltaic laminate achieve close contact through different means such as snap-fitting, attaching, and folding. Moreover, the final sealing position also has a tightly attached overlapping part, which greatly ensures the airtightness and prevents moisture from entering the battery module, thus helping to improve the reliability of the battery module. Furthermore, the overlapping part is located on the side of the photovoltaic laminate, which will not have a significant impact on the thickness of the photovoltaic laminate, thus avoiding affecting the subsequent module framing and ensuring high process compatibility.
[0006] In one alternative embodiment, the first, second, third, fourth, and fifth surfaces form a receiving space suitable for accommodating the corner of the photovoltaic laminate; the first seal is made of butyl rubber layer, which includes a first adhesive surface and a second adhesive surface disposed opposite to each other, with the first adhesive surface facing the receiving space for bonding and fixing to the photovoltaic laminate.
[0007] Beneficial Effects: In this invention, before the first sealing element is fully enclosed, the first, second, and third surfaces of the first sealing element are attached to the back and two sides of the photovoltaic laminate, respectively. Then, by flipping it over, the fourth surface is attached to the front of the photovoltaic laminate, and then the fifth surface is placed over the third surface, forming a complete sealing structure on the overall connection edge, greatly improving the sealing performance. Furthermore, the first sealing element is formed using a butyl rubber layer, where both sides of the butyl rubber layer are adhesive surfaces, i.e., having opposing first and second adhesive surfaces. The first adhesive surface faces the photovoltaic laminate within the accommodating space, while the second adhesive surface faces outwards away from the photovoltaic laminate. The final overlapping seal of the first sealing element, consisting of the fifth and third surfaces, is essentially the adhesion of the first adhesive surface of the butyl rubber layer on the third surface and the second adhesive surface of the butyl rubber layer on the fifth surface. Applying a certain force ensures complete adhesion of the two butyl rubber materials, meaning the overlapping portion at the final seal of the first sealing element is an adhesion of the same material, without introducing additional interfaces or differences in adhesive edge height, thus achieving highly efficient water blocking.
[0008] In one alternative embodiment, a release film layer is adapted to be disposed on the second adhesive surface of the butyl adhesive layer, the release film layer being adapted to detach from the second adhesive surface under external force.
[0009] Beneficial effects: The butyl rubber layer in its initial state is further provided with a release adhesive layer on the outer second bonding surface. During the bonding process of the first seal, the first bonding surface of the butyl rubber layer faces inward, and the side with the release film layer faces outward. The presence of the release adhesive layer ensures that the bonding surface will not stick to the hands or equipment. After the first seal is bonded, the surface release film is removed, thus improving the bonding and sealing performance.
[0010] In one alternative embodiment, the thickness of the butyl rubber layer ranges from 80 μm to 130 μm.
[0011] Beneficial effects: Too thin a layer is insufficient to meet the bonding requirements, while too thick a layer will result in a large height difference between the stacked butyl rubber layers, thus affecting the water-blocking performance. In addition, an excessively thick butyl rubber layer will also increase the risk of displacement and cost.
[0012] In one optional embodiment, under an operating temperature of 130°C and an external force of 10 kg, the melt index of the butyl rubber layer ranges from 16 cm⁻¹. 3 / 10min~26cm 3 / 10min.
[0013] Beneficial effects: Butyl adhesive layers with the above-mentioned melt flow index firstly mean that the adhesive has moderate fluidity when heated to 130°C. This avoids excessive fluidity leading to overflow or difficulty in control during application, while also preventing uneven coating due to insufficient fluidity, thus optimizing processing performance and achieving a balance between fluidity and operability. Secondly, a melt flow index within this range further ensures the density of the adhesive in the molten state, preventing micropores or bubbles in the sealing layer caused by improper fluidity. This effectively blocks moisture intrusion, extending the component's lifespan. Simultaneously, it ensures the formation of a uniform and stable cross-linked structure after curing, exhibiting excellent aging and weather resistance, thus enhancing sealing performance and maintaining low moisture permeability and long-term stability. Furthermore, this melt flow index allows the adhesive to fully wet the substrate surface in the molten state, forming strong mechanical and chemical bonds, improving adhesive strength and shear strength, thereby enhancing bonding performance and adaptability to various materials.
[0014] In one alternative embodiment, the height of the third surface is less than or equal to the thickness of the photovoltaic laminate in a direction perpendicular to the first surface.
[0015] Beneficial effect: The height of the third side can be the same as or slightly less than the thickness of the photovoltaic laminate, which helps to ensure the sealing and protection of the sides of the photovoltaic laminate.
[0016] In one alternative embodiment, in a direction perpendicular to the first surface, the height of the fifth surface is less than the thickness of the photovoltaic laminate, and the sum of the heights of the third and fifth surfaces is greater than the thickness of the photovoltaic laminate.
[0017] Beneficial effects: Setting the height of the fifth surface to be less than the thickness of the photovoltaic laminate ensures that the fifth surface overlaps with the third surface to a certain extent, while also preventing its excessive height from affecting folding and bonding on the third surface, and also helps to save costs.
[0018] In one alternative implementation, the first seal is a one-piece molded structure.
[0019] Beneficial effects: It helps to further ensure the sealing performance of the first seal, especially the sealing performance at the fold position.
[0020] In one optional embodiment, it further includes: a second seal, which surrounds the side of the photovoltaic laminate and extends to cover the front and back of the photovoltaic laminate, and the edge of the second seal overlaps with the first seal, the width of the overlap being greater than 10 mm.
[0021] Beneficial effects: Since the second seal does not overlap, it can be used to seal the four sides of the photovoltaic laminate using aluminum foil tape. The second seal overlaps the surface of the first seal on the sides of the photovoltaic laminate, with an overlap width greater than 10mm. There are no leakage channels at the junction, further enhancing sealing performance. In summary, using a combination of butyl rubber and aluminum foil tape to achieve the sealing and encapsulation of the photovoltaic laminate effectively enhances module reliability while minimizing costs and improving economic efficiency.
[0022] Secondly, the present invention also provides a battery assembly, comprising: a photovoltaic laminate and the aforementioned sealing structure, wherein the photovoltaic laminate includes opposing front and back sides and a side connecting the front and back sides; the sealing structure is disposed on the side of the photovoltaic laminate and extends to cover at least a portion of the front and back sides.
[0023] Beneficial effects: The photovoltaic laminate of the battery module adopts the above-mentioned sealing structure. Specifically, the first sealing element set at the corner of the photovoltaic laminate effectively blocks water at the corner. The first sealing element includes five sealing surfaces that are partially movable and have a folding function. The structure is simple and easy to manufacture. Each sealing surface is in close contact with different surfaces of the photovoltaic laminate through various means such as snap-fitting, attaching, and folding. The final sealing position also has a tightly attached overlapping part, which greatly ensures the airtightness and prevents water vapor from entering the battery module, thus helping to improve the reliability of the battery module. Moreover, the overlapping part is located on the side of the photovoltaic laminate, which will not have a significant impact on the thickness of the photovoltaic laminate, thus avoiding affecting the subsequent module framing and ensuring high process compatibility. Attached Figure Description
[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 This is a top view of the battery assembly according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the first sealing element in this embodiment of the present invention before folding; Figure 3 This is a schematic diagram of the structure of the first sealing element after folding in an embodiment of the present invention; Figure 4 This is a schematic diagram of the butyl rubber layer and release film layer in an embodiment of the present invention.
[0026] Explanation of reference numerals in the attached figures: 100. Battery module; 10. Sealing structure; 20. Photovoltaic laminate; 1. First sealing element; 11. First surface; 111. First side; 112. Second side; A1. First included angle; 12. Second surface; 13. Third surface; 14. Fourth surface; 141. Third side; 142. Fourth side; A2. Second included angle; 15. Fifth surface; 16. Accommodating space; 17. Butyl rubber layer; 171. First bonding surface; 172. Second bonding surface; 18. Release film layer; 2. Second sealing element. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0028] refer to Figures 1 to 4This embodiment provides a sealing structure 10 for a battery module, suitable for being disposed around a photovoltaic laminate 20, including a first sealing member 1 disposed at a corner of the photovoltaic laminate 20. The first sealing member 1 includes: a first surface 11, a second surface 12, a third surface 13, a fourth surface 14, and a fifth surface 15. The first surface 11 is polygonal, and adjacent first sides 111 and second sides 112 form a first included angle A1, which is the same as the angle of the corner of the photovoltaic laminate 20. The second surface 12 is perpendicular to the first surface 11 and one side is connected to the first side 111 of the first surface 11. The third surface 13 is perpendicular to the first surface 11 and one side is connected to the first side 111 of the first surface 11. The second side 112 of 1 is connected; the fourth surface 14 includes a third side 141 and a fourth side 142 forming a second included angle A2. The third side 141 is connected to the side of the second surface 12 away from the first surface 11. The fourth surface 14 is adapted to rotate along the third side 141 under the action of an external force so as to be opposite to the first surface 11 in a direction perpendicular to the first surface 11. The second included angle A2 is equal in size to the first included angle A1. One side of the fifth surface 15 is connected to the fourth side 142. When the fourth surface 14 is rotated to be opposite to the first surface 11, the fifth surface 15 is adapted to be adhered to the third surface 13 under the action of an external force. The third surface 13 and the fifth surface 15 at least partially overlap.
[0029] like Figure 1 As shown, the photovoltaic laminate 20 is typically rectangular, with right angles at its corners. Based on this, the first included angle A1 and the second included angle A2 are also set as right angles. Furthermore, the photovoltaic laminate 20 includes, but is not limited to, heterojunction cell types. The first surface 11 can be set as any polygon with at least one right angle, such as a right-angled triangle, a rectangle, or an irregular pentagon or hexagon with one right angle. Since the fourth surface 14 is positioned opposite to the first surface 11 when sealing the photovoltaic laminate 20, the fourth surface 14 can have the same shape as the first surface 11. Of course, the fourth surface 14 and the first surface 11 can also have different shapes. In this embodiment, it is preferred that both the first surface 11 and the fourth surface 14 are right-angled triangles, which provides structural stability and saves costs. Figure 2 and Figure 3As shown, the second surface 12 and the third surface 13 are both perpendicular to the first surface 11, and the bottom edges of the second surface 12 and the third surface 13 are connected to the first edge 111 and the second edge 112 of the first surface 11, respectively. The top edge of the second surface 12 is connected to the third edge 141 of the fourth surface 14. The fourth surface 14 can rotate along the edge formed by this connection until the surface of the fourth surface 14 is parallel to the first surface 11. At this time, the fourth edge 142 of the fourth surface 14 is opposite to the second edge 112 of the first surface 11, and the projection of the second included angle A2 on the first surface 11 overlaps with the first included angle A1. Then, the fifth surface 15 connected to the fourth surface 14 can rotate along the edge connecting the fourth edge 142 and the third surface 13 until it is attached to the third surface 13. That is, firstly, the first surface 11, the second surface 12 and the third surface 13 are snapped together with the back and two sides of the photovoltaic laminate 20. After fixing, the second surface 12 of the first sealing element 1 is folded over and attached to the front of the photovoltaic laminate 20 along the third side 141. Then, the fifth surface 15 is folded down along the fourth side 142 and attached to the third surface 13, thus completing the attachment and sealing of the first sealing element 1 at the corner of the photovoltaic laminate 20.
[0030] The sealing structure 10 in this embodiment includes a first sealing element 1 disposed at the corner of the photovoltaic laminate 20. The first sealing element 1 includes five sealing surfaces that are partially movable and have a folding function. The structure is simple and easy to manufacture. Each sealing surface is in close contact with different surfaces of the photovoltaic laminate 20 through different means such as snap-fitting, attaching, and folding. The final sealing opening also has a tightly attached overlapping part, which greatly ensures the airtightness and prevents moisture from entering the battery module 100, thus helping to improve the reliability of the battery module 100. Moreover, the overlapping part is located on the side of the photovoltaic laminate 20, which will not have a significant impact on the thickness of the photovoltaic laminate 20, thus avoiding affecting the subsequent module framing and ensuring high process compatibility.
[0031] refer to Figures 1 to 3 The first surface 11, the second surface 12, the third surface 13, the fourth surface 14 and the fifth surface 15 form a accommodating space 16 suitable for accommodating the corner of the photovoltaic laminate 20; the first sealing element 1 adopts a butyl rubber layer 17, which includes a first adhesive surface 171 and a second adhesive surface 172 disposed opposite to each other, with the first adhesive surface 171 facing the accommodating space 16 to be bonded and fixed to the photovoltaic laminate 20.
[0032] Specifically, before the first sealing element 1 is fully enclosed, the first surface 11, the second surface 12 and the third surface 13 of the first sealing element 1 are attached to the back and two sides of the photovoltaic laminate 20, respectively. Then, by flipping, the fourth surface 14 is attached to the front of the photovoltaic laminate 20. Then, the fifth surface 15 is covered on the third surface 13 to form a complete sealing structure 10 on the overall connection edge, which greatly improves the sealing performance. Furthermore, in this embodiment, butyl rubber layer 17 is used to form the constituent surfaces of the first sealing element 1. Both sides of the butyl rubber layer 17 are adhesive surfaces, namely, a first adhesive surface 171 and a second adhesive surface 172. The first adhesive surface 171 faces the photovoltaic laminate 20 within the accommodating space 16, while the second adhesive surface 172 faces outwards away from the photovoltaic laminate 20. The final overlapping seal of the first sealing element 1 on the fifth surface 15 and the third surface 13 is essentially the adhesion of the first adhesive surface 171 of the butyl rubber layer 17 on the third surface 13 and the second adhesive surface 172 of the butyl rubber layer 17 on the fifth surface 15. Applying a certain force ensures complete adhesion of the two butyl rubber materials. Compared to conventional solutions that use aluminum foil tape comprising a water-blocking adhesive layer, an aluminum foil layer, and a surface PET layer at corner positions, the overlapping portion at the final seal of the first sealing element 1 in this embodiment is an adhesion of the same material, avoiding the introduction of more interfaces or differences in adhesive edge height, thus achieving highly efficient water blocking.
[0033] like Figure 4 As shown, in one embodiment, a release film layer 18 is adapted to be disposed on the second adhesive surface 172 of the butyl adhesive layer 17, and the release film layer 18 is adapted to detach from the second adhesive surface 172 under the action of external force.
[0034] Specifically, the butyl rubber layer 17 in its initial state is further provided with a release adhesive layer on the outer second adhesive surface 172. During the pasting process of the first seal 1, the first adhesive surface 171 of the butyl rubber layer 17 faces inward, and the side with the release film layer 18 faces outward. The presence of the release adhesive layer ensures that the adhesive surface will not stick to the hands or equipment. After the first seal 1 is pasted, the surface release film is removed to improve the bonding and sealing performance.
[0035] In one embodiment, the thickness of the butyl rubber layer 17 is in the range of 80 μm to 130 μm.
[0036] Specifically, too small a thickness is insufficient to meet the bonding requirements, while too large a thickness will result in a large height difference between the stacked butyl rubber layers 17, thus affecting the water-blocking performance. Moreover, an excessively thick butyl rubber layer 17 will also increase the risk of displacement and cost.
[0037] In one embodiment, under an operating temperature of 130°C and an external force of 10 kg, the melt index of the butyl rubber layer 17 is 16 cm⁻¹. 3 / 10min~26cm 3 / 10min.
[0038] Specifically, the butyl adhesive layer 17 with the above parameters in this embodiment firstly means that the adhesive has moderate fluidity when heated to 130°C. This prevents overflow or difficulty in control during application due to excessive fluidity, and also avoids uneven coating due to insufficient fluidity, thus optimizing processing performance and achieving a balance between fluidity and operability. Secondly, a melt index within this range further ensures the density of the adhesive in the molten state, preventing micropores or bubbles in the sealing layer due to improper fluidity. This effectively blocks moisture intrusion, extending the component's service life. Simultaneously, it ensures the formation of a uniform and stable cross-linked structure after curing, exhibiting excellent aging and weather resistance, thus enhancing sealing performance and maintaining low moisture permeability and long-term stability. Moreover, such a melt index allows the adhesive to fully wet the substrate surface in the molten state, forming strong mechanical and chemical bonds, improving adhesive strength and shear strength, thereby enhancing bonding performance and adaptability to various materials.
[0039] In one embodiment, in a direction perpendicular to the first surface 11, the height of the third surface 13 is less than or equal to the thickness of the photovoltaic laminate 20.
[0040] In this embodiment, the direction perpendicular to the first surface 11 is also the thickness direction of the photovoltaic laminate 20. Therefore, the height of the third surface 13 can be the same as or slightly less than the thickness of the photovoltaic laminate 20 to ensure sealing protection of the sides of the photovoltaic laminate 20. In this embodiment, it is preferable that the height of the third surface 13 is the same as the thickness of the photovoltaic laminate 20, such as... Figure 2 As shown.
[0041] refer to Figure 2 and Figure 3 In one embodiment, in the direction perpendicular to the first surface 11, the height of the fifth surface 15 is less than the thickness of the photovoltaic laminate 20, and the sum of the heights of the third surface 13 and the fifth surface 15 is greater than the thickness of the photovoltaic laminate 20.
[0042] Specifically, the height of the fifth surface 15 is set to be less than the thickness of the photovoltaic laminate 20. This ensures that the fifth surface 15 and the third surface 13 have a certain overlap range, while also avoiding excessive height that could affect folding and bonding on the third surface 13. It also helps to save costs.
[0043] In one embodiment, such as Figure 2 As shown, the first sealing element 1 is an integrally molded structure, which further ensures the sealing performance of the first sealing element 1, especially the sealing performance at the folded position.
[0044] refer to Figure 1The sealing structure 10 of this embodiment further includes a second sealing member 2. The second sealing member 2 surrounds the side of the photovoltaic laminate 20 and extends to cover the front and back of the photovoltaic laminate 20. The edge of the second sealing member 2 overlaps with the first sealing member 1, and the width of the overlap is greater than 10 mm.
[0045] For example, since the second seal 2 does not overlap, it can be sealed on all four sides of the photovoltaic laminate 20 using aluminum foil tape. The second seal 2 overlaps the portion of the first seal 1 on the four sides of the photovoltaic laminate 20, with an overlap width greater than 10mm. This overlap eliminates leakage channels, further enhancing sealing performance. In summary, the combination of butyl rubber layer 17 and aluminum foil tape achieves the sealed encapsulation of the photovoltaic laminate 20, effectively enhancing module reliability while minimizing costs and improving economic efficiency.
[0046] refer to Figure 1 This embodiment also provides a battery assembly 100, including: a photovoltaic laminate 20 and the sealing structure 10 described above. The photovoltaic laminate 20 includes a front side and a back side opposite to each other and a side side connecting the front side and the back side. The sealing structure 10 is disposed on the side side of the photovoltaic laminate 20 and extends to cover at least a portion of the front side and the back side.
[0047] Specifically, the photovoltaic laminate 20 of the battery module 100 adopts the aforementioned sealing structure 10. Specifically, effective water blocking at the corner is achieved by a first sealing element 1 set at the corner of the photovoltaic laminate 20. The first sealing element 1 includes five sealing surfaces that are partially movable and have a folding function. The structure is simple and easy to manufacture. Each sealing surface and different surfaces of the photovoltaic laminate 20 achieve close contact through different means such as snap-fitting, attaching, and folding. The final sealing position also has a tightly attached overlapping part, which greatly ensures airtightness and prevents water vapor from entering the battery module 100, thus helping to improve the reliability of the battery module 100. Moreover, the overlapping part is located on the side of the photovoltaic laminate 20, which will not have a significant impact on the thickness of the photovoltaic laminate 20, thus avoiding affecting the subsequent module framing and ensuring high process compatibility.
[0048] Further functional descriptions of the above structures are the same as those of the corresponding embodiments described above, and will not be repeated here.
[0049] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A sealing structure for a battery module, suitable for being disposed around a photovoltaic laminate, characterized in that, Includes a first seal disposed at the corner of the photovoltaic laminate, the first seal comprising: The first surface is polygonal and has an adjacent first side and a second side forming a first included angle, which is the same as the angle of the corner of the photovoltaic laminate. The second surface is perpendicular to the first surface and one side is connected to the first side of the first surface; The third surface is perpendicular to the first surface and one side is connected to the second side of the first surface; The fourth surface includes a third side and a fourth side forming a second included angle. The third side is connected to the side of the second surface away from the first surface. The fourth surface is adapted to rotate along the third side under the action of an external force so as to be opposite to the first surface in a direction perpendicular to the first surface. The second included angle is equal in size to the first included angle. The fifth surface has one side connected to the fourth surface. When the fourth surface is rotated to be opposite to the first surface, the fifth surface is adapted to be bonded to the third surface under the action of external force. The third surface and the fifth surface at least partially overlap.
2. The sealing structure according to claim 1, characterized in that, The first surface, the second surface, the third surface, the fourth surface, and the fifth surface form an accommodating space suitable for accommodating the corner of the photovoltaic laminate; The first seal is made of butyl rubber layer, which includes a first adhesive surface and a second adhesive surface disposed opposite to each other, with the first adhesive surface facing the accommodating space for bonding and fixing with the photovoltaic laminate.
3. The sealing structure according to claim 2, characterized in that, A release film layer is adapted to be disposed on the second adhesive surface of the butyl adhesive layer, and the release film layer is adapted to detach from the second adhesive surface under the action of external force.
4. The sealing structure according to claim 2, characterized in that, The thickness of the butyl rubber layer ranges from 80 μm to 130 μm.
5. The sealing structure according to claim 2, characterized in that, Under an operating temperature of 130°C and an external force of 10 kg, the melt index of the butyl rubber layer ranges from 16 cm⁻¹. 3 / 10min~26cm 3 / 10min.
6. The sealing structure according to claim 1, characterized in that, In a direction perpendicular to the first surface, the height of the third surface is less than or equal to the thickness of the photovoltaic laminate.
7. The sealing structure according to claim 1, characterized in that, In the direction perpendicular to the first surface, the height of the fifth surface is less than the thickness of the photovoltaic laminate, and the sum of the heights of the third surface and the fifth surface is greater than the thickness of the photovoltaic laminate.
8. The sealing structure according to claim 1, characterized in that, The first sealing element is a one-piece molded structure.
9. The sealing structure according to any one of claims 1-8, characterized in that, Also includes: A second seal is disposed around the side of the photovoltaic laminate and extends to cover the front and back sides of the photovoltaic laminate, and the edge of the second seal overlaps with the first seal, the width of the overlap being greater than 10 mm.
10. A battery assembly, characterized in that, include: A photovoltaic laminate, the photovoltaic laminate including opposing front and back sides and a side connecting the front and back sides; The sealing structure according to any one of claims 1-9, wherein the sealing structure is disposed on the side of the photovoltaic laminate and extends to cover at least a portion of the front and the back surfaces.