Solar cell packaging structure

Abstract

The utility model relates to the technical field of solar cells, and discloses a solar cell packaging structure, comprising a cell assembly comprising front plate glass, a cell film layer and back plate glass which are stacked in sequence; the edge sealing body is connected with the front plate glass and the back plate glass, and the edge sealing body, the front plate glass and the back plate glass define a space for protecting a battery cell film layer; the bus bar is attached to the membrane surface of one side, deviating from the front plate glass, of the battery cell membrane layer; and the cell film layer is arranged corresponding to the outer edge of one side outline of the bus bar and the edge sealing body in a clearance manner. Compared with the mode that the bus bar is arranged between the battery cell film layer and the edge sealing body, the solar cell packaging structure provided by the utility model has the advantages that the bus bar is attached to the film surface of one side, deviating from the front plate glass, of the battery cell film layer, so that the bus bar can be prevented from occupying the mounting space of the battery cell film layer, the effective power generation area of the battery cell film layer is further increased, and the power generation efficiency is improved. And the photoelectric conversion efficiency of the battery assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, and particularly relates to a solar cell packaging structure. Background Art

[0002] Perovskite solar cells are a new type of thin-film solar cell technology. Compared with traditional silicon-based solar cells, they have multiple advantages such as high efficiency, low cost, and easy preparation. Compared with the manufacturing process of traditional silicon-based solar cells, the production cost of perovskite solar cells is lower. Their preparation process is relatively simple, and the raw material cost is relatively low, which helps to promote the popularization and application of solar cells. Perovskite solar cells have great potential in terms of high conversion efficiency, tunability, and flexibility, and are widely regarded as one of the development directions of future solar cell technologies.

[0003] Currently, in perovskite cells, since a bus bar needs to be attached to lead out the electrode, it is usually necessary to remove a part of the cell film layer from the front plate glass to form a clear edge area for attaching the bus bar. However, this method will reduce the overall occupied area of the cell film layer, and thus reduce the area participating in the photovoltaic conversion of sunlight. Based on this technical problem, this application is hereby proposed to increase the effective power generation area of the cell film surface and improve the power generation efficiency. Summary of the Utility Model

[0004] In view of this, the utility model provides a solar cell packaging structure to solve the technical problem in the related art that the effective power generation area of the battery is affected due to the need to attach the bus bar in the clear edge area.

[0005] The utility model provides a solar cell packaging structure, including:

[0006] A battery assembly, including a front plate glass, a cell film layer, and a back plate glass that are sequentially stacked;

[0007] An edge sealant, connecting the front plate glass and the back plate glass, and enclosing a space for protecting the cell film layer with the front plate glass and the back plate glass;

[0008] A bus bar, attached to the side film surface of the cell film layer facing away from the front plate glass; a side contour outer edge of the cell film layer corresponding to the bus bar is arranged at an interval from the edge sealant.

[0009] Beneficial effects: Compared with the case where the bus bar is arranged between the battery cell film layer and the edge sealant, in the solar cell encapsulation structure provided by the present utility model, the bus bar is attached to the side film surface of the battery cell film layer facing away from the front plate glass, which can avoid the bus bar occupying the installation space of the battery cell film layer on the front plate glass, thereby increasing the proportion area of the battery cell film layer on the front plate glass, enlarging the effective power generation area of the battery cell film layer, and improving the photoelectric conversion efficiency of the battery module. It can be achieved that under the condition of a specific clear edge area width, the battery cell film layer can be as close as possible to the edge sealant, maximizing the area of the battery cell film layer. Secondly, a gap is provided between the outer edge of the side contour of the battery cell film layer corresponding to the bus bar and the edge sealant. On the one hand, it can prevent the bus bar, the battery cell film layer and the edge sealant from undergoing an electrochemical reaction, and is also used for the filling of the encapsulation adhesive film in the subsequent process; on the other hand, it can also prevent the heat generated by the bus bar and the battery cell film layer during use from directly acting on the edge sealant, thereby avoiding affecting the sealing performance of the edge sealant and ensuring the reliability and durability of the battery module.

[0010] In an alternative embodiment, the bus bar includes an insulating tape and a bus bar body. One side surface of the insulating tape is an adhesive surface and the other side surface is a non - adhesive surface. The adhesive surface of the insulating tape is bonded to the bus bar body to keep them relatively fixed, and the non - adhesive surface of the insulating tape is attached to the battery cell film layer.

[0011] Beneficial effects: Since the bus bar body itself has no adhesiveness, bonding the adhesive surface of the insulating tape to the bus bar body can effectively prevent the bus bar body from moving randomly on the surface of the battery cell film layer, ensuring the stability of the relative position between the bus bar body and the battery cell film layer, and avoiding problems such as poor contact or short - circuit caused by its random movement. Further, since the insulating tape has an inherent electrical insulation property, setting the insulating tape between the bus bar body and the battery cell film layer can effectively prevent electrochemical reactions or short - circuit problems between the bus bar body and the battery cell film layer. In addition, usually, the adhesive surface of the insulating tape contains acrylic acid. When acrylic acid comes into contact with the battery cell film layer, it is easy to cause the battery cell film layer to change color, affecting the photoelectric conversion efficiency of the battery module. Therefore, in the present utility model, only the side of the insulating tape used for pasting and fixing the bus bar body is set as the adhesive surface, which can effectively avoid the problem of color change at the contact between the insulating tape and the battery cell film layer, and extend the service life of the battery module.

[0012] In an alternative embodiment, both ends of the bus bar are fixed to the battery cell film layer or the front plate glass.

[0013] Beneficial effects: By fixing both ends of the bus bar on the cell film layer or the front plate glass, the present utility model can ensure the stable position of the bus bar in the entire battery module, avoiding displacement or loosening caused by vibration or external impact. Fixing only at both ends of the bus bar ensures that there is as little other substance as possible between the cell film layer and the bus bar, further reducing the possibility of discoloration of the cell film layer. The two ends of the bus bar are fixed to the cell film layer or the front plate glass, and the fixing position can be freely selected according to the width of the clear edge distance of the battery module itself.

[0014] In an alternative embodiment, fixed contacts are provided at both ends of the bus bar, and the fixed contacts are used to fix the bus bar on the cell film layer or the front plate glass.

[0015] Beneficial effects: By using the fixed contacts to fix the bus bar on the cell film layer or the front plate glass, the present utility model can ensure the stable position of the bus bar in the entire battery module. In addition, the operation method of this fixing scheme is relatively simple, which helps to simplify the assembly process, improve the assembly efficiency, reduce the production cost, and through point contact fixing, while ensuring that the bus bar can be relatively fixed to the cell film layer, it can reduce the introduction of other materials and reduce the risk of discoloration of the cell film layer.

[0016] In an alternative embodiment, a plurality of fixed contacts are provided between the bus bar and the cell film layer, and the plurality of fixed contacts are arranged at intervals along the length direction of the bus bar.

[0017] Beneficial effects: By providing a plurality of fixed contacts between the bus bar and the cell film layer, the present utility model can ensure that the position of the bus bar in the entire battery module is more stable, avoiding displacement or loosening caused by vibration or external impact. In addition, arranging the plurality of fixed contacts at intervals along the length direction of the bus bar can make the bus bar and the cell film layer evenly stressed, reduce the possibility of deformation of the bus bar and the cell film layer, and ensure the durability and reliability of the battery module.

[0018] In an alternative embodiment, the fixed contacts are glue dots formed after the curing of glue.

[0019] Beneficial effects: Compared with other fixing methods, connecting the bus bar and the cell film layer by means of gluing is not only simpler and faster in operation, saving assembly time, but also can avoid damage to the cell film layer during the assembly process, ensure that the photoelectric conversion efficiency of the cell film layer is not affected, and improve the overall performance of the battery module.

[0020] In an alternative embodiment, the glue is a non-acrylic colloid material.

[0021] Beneficial effects: Since acrylic acid will turn yellow under the influence of ultraviolet light or moisture, affecting the appearance and performance of the battery module. Therefore, by using a non-acrylic adhesive solution, the above problems can be effectively solved, the weather resistance of the battery module can be improved, and the service life of the battery module can be extended.

[0022] In an alternative embodiment, the width of the insulating tape is greater than the width of the bus bar body, and both edges in the width direction of the bus bar body are spaced from both edges in the width direction of the insulating tape. The bus bar body, the insulating tape, and the battery cell film layer form a stepped laminated structure, and the distance from the bus bar body to the edge of the insulating tape is not less than half of the width of the bus bar body.

[0023] Beneficial effects: In the present utility model, the width of the insulating tape is greater than the width of the bus bar body, which can ensure that there is a sufficient insulating layer between the bus bar body and the battery cell film layer, preventing an electrochemical reaction or short circuit between the battery cell film layer and the bus bar body. Further, by widening the width of the insulating tape itself and defining the distance between the edge of the bus bar body and the edge of the insulating tape, the film stress between the bus bar body and the battery cell film surface can be effectively reduced, preventing the problem of film peeling of the battery cell film layer.

[0024] In an alternative embodiment, it further includes a conductive tape disposed perpendicular to the bus bar. The conductive tape is attached to the side surface of the battery cell film layer facing away from the front plate glass, and a gap is provided between the outer contour edge of the battery cell film layer corresponding to the conductive tape and the edge seal.

[0025] Beneficial effects: In the present utility model, the conductive tape is disposed perpendicular to the bus bar. The conductive tape is used to be attached to the positive and negative electrodes of the battery cell film layer. On the side where the conductive tape is located, the clear edge distance between the battery cell film layer and the edge seal can also be reduced, thereby increasing the overall area of the battery cell film layer to improve the power generation efficiency.

[0026] In an alternative embodiment, in the length direction of the conductive tape, the bus bar is disposed at any position on the conductive tape.

[0027] Beneficial effects: The bus bar can be disposed at any position on the conductive tape, enabling the design and layout of the battery module to be more diversified. Furthermore, the operator can flexibly adjust the relative position of the bus bar and the conductive tape according to actual needs and design requirements, and flexibly adjust the position of the wire outlet hole on the back plate glass for leading out the bus bar body. Description of the Drawings

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 Structural schematic diagram of a solar cell encapsulation structure according to an embodiment of the present invention;

[0030] Figure 2 is Figure 1 Structural schematic diagram of another perspective of the shown solar cell encapsulation structure;

[0031] Figure 3 Partial structural schematic diagram of a solar cell encapsulation structure according to an embodiment of the present invention.

[0032] Explanation of reference numerals:

[0033] 1. Battery assembly; 101. Front plate glass; 102. Core film layer; 103. Back plate glass; 2. Edge sealant; 3. Bus bar; 301. Insulating tape; 302. Bus bar body; 4. Fixed contact; 5. Conductive tape; 6. Adhesive film. Specific embodiments

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0035] Aiming at the technical problem in the related art that the effective power generation area of the battery is affected due to the need to attach the bus bar in the edge cleaning area, the present invention provides a solar cell encapsulation structure.

[0036] The following combines Figures 1 to 2 , to describe the embodiments of the present invention.

[0037] According to the embodiments of the present invention, as Figure 1 and Figure 2 shown, the present invention provides a solar cell encapsulation structure, including: a battery assembly 1, an edge sealant 2, and a bus bar 3.

[0038] Specifically, the battery module 1 includes a front plate glass 101, a battery cell film layer 102, and a back plate glass 103 that are stacked in sequence; an edge seal 2 connects the front plate glass 101 and the back plate glass 103, and encloses a space for protecting the battery cell film layer 102 with the front plate glass 101 and the back plate glass 103; a bus bar 3 is attached to the side film surface of the battery cell film layer 102 facing away from the front plate glass 101; a gap is provided between the outer edge of the side contour of the battery cell film layer 102 corresponding to the bus bar 3 and the edge seal 2.

[0039] Compared with setting the bus bar 3 between the battery cell film layer 102 and the edge seal 2, the solar cell encapsulation structure provided in this embodiment attaches the bus bar 3 to the side film surface of the battery cell film layer 102 facing away from the front plate glass 101, which can avoid the bus bar 3 occupying the installation space of the battery cell film layer 102 on the front plate glass 101, thereby increasing the proportion area of the battery cell film layer 102 on the front plate glass 101, increasing the effective power generation area of the battery cell film layer 102, and improving the photoelectric conversion efficiency of the battery module 1. It can achieve that under the condition of a specific clear edge area width, the battery cell film layer 102 can be as close as possible to the edge seal 2, maximizing the area of the battery cell film layer 102. Secondly, a gap is provided between the outer edge of the side contour of the battery cell film layer 102 corresponding to the bus bar 3 and the edge seal 2. On the one hand, it can prevent an electrochemical reaction between the bus bar 3 and the battery cell film layer 102 and the edge seal 2, and is also used for the filling of the encapsulation film 6 in the subsequent process; on the other hand, it can also prevent the heat generated by the bus bar 3 and the battery cell film layer 102 during use from directly acting on the edge seal 2, thereby avoiding affecting the sealing performance of the edge seal 2 and ensuring the reliability and durability of the battery module 1.

[0040] It should be noted that the battery module 1 in this embodiment can be a formal perovskite solar cell structure or an inverted perovskite solar cell structure. Specifically, when the battery module 1 is a formal perovskite solar cell structure, the perovskite solar cell module 1 includes an electron transport layer, a perovskite layer, a hole transport layer, and an electrode layer that are stacked in sequence. Among them, the electron transport layer abuts against the front plate glass 101, and the electrode layer abuts against the back plate glass 103. When the perovskite solar cell module 1 is an inverted perovskite solar cell structure, the perovskite solar cell module 1 includes a hole transport layer, a perovskite layer, an electron transport layer, a passivation layer, and an electrode layer that are stacked in sequence. Among them, the hole transport layer abuts against the front plate glass 101, and the electrode layer abuts against the back plate glass 103.

[0041] In addition, in an embodiment not shown, the edge seal 2 is butyl rubber. By using butyl rubber, not only can the overall stability of the solar cell packaging structure be improved, but also a sealing structure of the battery module 1 can be formed by the butyl rubber, the front plate glass 101 and the back plate glass 103, so that moisture and oxygen in the external environment will not erode or damage the internal structure of the battery module 1, thereby effectively improving the stability of the battery module 1 and extending the service life of the battery module 1.

[0042] According to an embodiment of the present invention, as Figure 2 shown, the bus bar 3 includes an insulating tape 301 and a bus bar body 302. One side surface of the insulating tape 301 is an adhesive surface and the other side surface is a non-adhesive surface. The adhesive surface of the insulating tape 301 is bonded to the bus bar body 302 to maintain relative fixation, and the non-adhesive surface of the insulating tape 301 is attached to the cell film layer 102. Since the bus bar body 302 itself has no adhesiveness, bonding the adhesive surface of the insulating tape 301 to the bus bar body 302 can effectively prevent the bus bar body 302 from moving randomly on the surface of the cell film layer 102, ensure the stability of the relative position between the bus bar body 302 and the cell film layer 102, and avoid problems of poor contact or short circuit caused by its random movement. Further, since the insulating tape 301 has an inherent electrical insulation property, arranging the insulating tape 301 between the bus bar body 302 and the cell film layer 102 can effectively prevent electrochemical reactions or short circuit problems between the bus bar body 302 and the cell film layer 102. In addition, usually, the adhesive surface of the insulating tape 301 contains acrylic acid. When the acrylic acid comes into contact with the cell film layer 102, it is easy to cause the cell film layer 102 to change color, affecting the photoelectric conversion efficiency of the battery module 1. Therefore, in this embodiment, only the side of the insulating tape 301 used for pasting and fixing the bus bar body 302 is set as the adhesive surface, which can effectively avoid the problem of color change at the contact between the insulating tape 301 and the cell film layer 102 and extend the service life of the battery module 1.

[0043] According to an embodiment of the present invention, as Figure 1 shown, both ends of the bus bar 3 are fixed on the cell film layer 102 or the front plate glass 101. In this embodiment, by fixing both ends of the bus bar 3 on the cell film layer 102 or the front plate glass 101, the position of the bus bar 3 in the entire battery module 1 can be ensured to be stable, and displacement or loosening caused by vibration or external impact can be avoided. Fixing only at both ends of the bus bar 3 ensures that there is as little other substance as possible between the cell film layer 102 and the bus bar 3, further reducing the possibility of color change of the cell film layer 102. Both ends of the bus bar 3 are fixed on the cell film layer 102 or the front plate glass 101, and are freely selected according to the width of the clear edge distance of the battery module 1 itself.

[0044] According to an embodiment of the present utility model, as Figure 1 shown, fixed contacts 4 are provided at both ends of the bus bar 3. The fixed contacts 4 are used to fix the bus bar 3 on the cell film layer 102 or the front plate glass 101. In this embodiment, by fixing the bus bar 3 on the cell film layer 102 or the front plate glass 101 through the fixed contacts 4, the position of the bus bar 3 in the entire battery assembly 1 can be ensured to be stable. In addition, the operation mode of this fixing scheme is relatively simple, which helps to simplify the assembly process, improve the assembly efficiency, reduce the production cost, and moreover, through point contact fixing, while ensuring that the bus bar 3 can be relatively fixed to the cell film layer 102, the introduction of other materials can be reduced, and the risk of discoloration of the cell film layer 102 can be reduced.

[0045] According to an embodiment of the present utility model, a plurality of fixed contacts 4 are provided between the bus bar 3 and the cell film layer 102, and the plurality of fixed contacts 4 are arranged at intervals along the length direction of the bus bar 3. In this embodiment, by providing a plurality of fixed contacts 4 between the bus bar 3 and the cell film layer 102, the position of the bus bar 3 in the entire battery assembly 1 can be ensured to be more stable, and displacement or loosening caused by vibration or external impact can be avoided. In addition, by arranging the plurality of fixed contacts 4 at intervals along the length direction of the bus bar 3, the bus bar 3 and the cell film layer 102 can be uniformly stressed, reducing the possibility of deformation of the bus bar 3 and the cell film layer 102, and ensuring the durability and reliability of the battery assembly 1.

[0046] According to an embodiment of the present utility model, the fixed contact 4 is a glue dot formed after the glue liquid is cured. Compared with other fixing methods, connecting the bus bar 3 and the cell film layer 102 by means of gluing is not only simpler and faster in operation, saving assembly time, but also can avoid damage to the cell film layer 102 during the assembly process, ensure that the photoelectric conversion efficiency of the cell film layer 102 is not affected, and improve the overall performance of the battery assembly 1.

[0047] According to an embodiment of the present utility model, the glue liquid is a non-acrylic colloid material. Since acrylic acid will turn yellow under the influence of ultraviolet light or moisture, affecting the appearance and performance of the battery assembly 1. Therefore, by using a non-acrylic glue liquid, the above problems can be effectively solved, the weather resistance of the battery assembly 1 can be improved, and the service life of the battery assembly 1 can be extended.

[0048] It can be understood that since the material of the glue liquid is a non-acrylic colloid, it will not affect the photoelectric conversion efficiency of the cell film layer 102. Therefore, in order to further improve the connection strength between the bus bar 3 and the cell film layer 102, a plurality of fixed contacts 4 between the bus bar 3 and the cell film layer 102 can be connected in sequence, that is, a non-acrylic colloid material is laid between the bus bar 3 and the cell film layer 102.

[0049] It can be understood that as shown in the appendix Figure 1As shown, the bus bar body 302 includes two bus bar bodies arranged at intervals in the length direction. One end of each bus bar body 302 is electrically connected to the conductive tape 5 on the corresponding side, and the other end is used to lead out from the wire outlet hole in the backplane glass 103 to the outside of the battery module 1.

[0050] As Figure 2 shown, in order to prevent air and moisture in the external environment from interfering with the cell film layer 102, a glue film 6 is usually provided between the backplane glass 103 and the cell film layer 102. Since the bus bar 3 itself has a certain thickness, after the bus bar 3 is attached to the cell film layer 102, a height difference will be formed between the bus bar 3 and the surface of the cell film layer 102. At this time, if the glue film 6 shrinks when cooled, the glue film 6 in this area will generate a pulling force to pull the cell film layer 102 upward, and then the cell film layer 102 will have a film peeling problem.

[0051] Based on this problem, according to an embodiment of the present invention, as Figure 3 shown, the width of the insulating tape 301 is greater than the width of the bus bar body 302, and both edges in the width direction of the bus bar body 302 are spaced from both edges in the width direction of the insulating tape 301. The bus bar body 302, the insulating tape 301, and the cell film layer 102 form a stepped laminated structure, and the distance from the bus bar body 302 to the edge of the insulating tape 301 is not less than half of the width of the bus bar body 302. In this embodiment, by widening the width of the insulating tape 301 itself and limiting the distance between the edge of the bus bar body 302 and the edge of the insulating tape 301, the stress of the glue film 6 between the bus bar body 302 and the cell film surface can be effectively reduced, and the film peeling problem of the cell film layer 102 can be prevented. In addition, in this embodiment, the width of the insulating tape 301 is made greater than the width of the bus bar body 302, which can ensure that there is enough insulating layer between the bus bar body 302 and the cell film layer 102 to prevent electrochemical reaction or short circuit between the cell film layer 102 and the bus bar body 302.

[0052] It can be understood that the thickness and width of the insulating tape 301 and the bus bar body 302 can be adjusted adaptively according to the design requirements, as long as the bus bar body 302, the insulating tape 301, and the cell film layer 102 can form a stepped laminated structure and the glue film 6 will not generate a large pulling force on the cell film layer 102. The present invention does not make specific limitations in this regard. Exemplarily, in a specific embodiment, the thickness range of the insulating tape 301 is 0.03 - 0.08 mm, and the width range is 15 - 30 mm; the thickness range of the bus bar body 302 is 0.08 - 0.1 mm, and the width range is 4 - 6 mm.

[0053] According to an embodiment of the present invention, as Figure 1As shown, it further includes a conductive tape 5 disposed perpendicular to the bus bar 3. The conductive tape 5 is attached to the side surface of the battery cell film layer 102 facing away from the front plate glass 101, and a clearance is provided between the outer edge of the side contour of the battery cell film layer 102 corresponding to the conductive tape 5 and the edge seal 2. In this embodiment, the conductive tape 5 is disposed perpendicular to the bus bar 3. The conductive tape 5 is used to be attached to the positive and negative electrodes of the battery cell film layer 102. On the side where the conductive tape 5 is located, the clear edge distance between the battery cell film layer 102 and the edge seal 2 can also be reduced, thereby increasing the dimensions of the battery cell film layer 2 in the length and width directions, and further increasing the overall area of the battery cell film layer 102 to improve the power generation efficiency.

[0054] According to an embodiment of the present invention, in the length direction of the conductive tape 5, the bus bar 3 is disposed at any position on the conductive tape 5. The bus bar 3 can be disposed at any position on the conductive tape 5, so that the design and layout of the battery module 1 can be more diversified. Furthermore, the operator can flexibly adjust the relative positions of the bus bar 3 and the conductive tape 5 according to actual requirements and design requirements, and flexibly adjust the position of the wire outlet hole on the back plate glass 103 for leading out the bus bar body 302.

[0055] Although the 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 solar cell encapsulation structure, characterized in that, Comprising: A battery assembly (1), including a front plate glass (101), a battery cell film layer (102), and a back plate glass (103) that are sequentially stacked; An edge seal (2), connecting the front plate glass (101) and the back plate glass (103), and enclosing a space with the front plate glass (101) and the back plate glass (103) to protect the battery cell film layer (102); A bus bar (3), attached to the side film surface of the battery cell film layer (102) facing away from the front plate glass (101); a side contour outer edge of the battery cell film layer (102) corresponding to the bus bar (3) is provided with a gap from the edge seal (2).

2. The solar cell encapsulation structure according to claim 1, characterized in that, The bus bar (3) includes an insulating tape (301) and a bus bar body (302). One side surface of the insulating tape (301) is an adhesive surface and the other side surface is a non-adhesive surface. The adhesive surface of the insulating tape (301) is bonded to the bus bar body (302) to maintain relative fixation, and the non-adhesive surface of the insulating tape (301) is attached to the battery cell film layer (102).

3. The solar cell encapsulation structure according to claim 2, wherein, Both ends of the bus bar (3) are fixed to the battery cell film layer (102) or the front plate glass (101).

4. The solar cell encapsulation structure according to claim 3, characterized in that, Fixed contacts (4) are provided at both ends of the bus bar (3), and the fixed contacts (4) are used to fix the bus bar (3) to the battery cell film layer (102) or the front plate glass (101).

5. The solar cell encapsulation structure according to claim 3, characterized in that, A plurality of fixed contacts (4) are provided between the bus bar (3) and the battery cell film layer (102), and the plurality of fixed contacts (4) are spaced at intervals along the length direction of the bus bar (3).

6. The solar cell encapsulation structure according to claim 4 or 5, characterized in that, The fixed contact (4) is a glue dot formed after the glue liquid is cured.

7. The solar cell encapsulation structure according to claim 6, characterized in that, The glue liquid is a non-acrylic colloid material.

8. The solar cell encapsulation structure according to claim 2, characterized in that, The width of the insulating tape (301) is greater than the width of the bus bar body (302), and both edges in the width direction of the bus bar body (302) are spaced from both edges in the width direction of the insulating tape (301). The bus bar body (302), the insulating tape (301), and the battery cell film layer (102) form a stepped stacked structure, and the distance from the bus bar body (302) to the edge of the insulating tape (301) is not less than half of the width of the bus bar body (302).

9. The solar cell encapsulation structure according to any one of claims 1 to 5, characterized in that It further includes a conductive tape (5) perpendicular to the bus bar (3), the conductive tape (5) is attached to the side surface of the battery cell film layer (102) facing away from the front plate glass (101), and a side contour outer edge of the battery cell film layer (102) corresponding to the conductive tape (5) is provided with a gap from the edge seal (2).

10. The solar cell encapsulation structure according to claim 9, characterized in that, In the length direction of the conductive tape (5), the bus bar (3) is disposed at any position on the conductive tape (5).

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