Battery string dispensing and taping method

Abstract

This invention relates to the field of photovoltaic module technology, specifically disclosing a method for stringing solar cells using adhesive dispensing and film coating. The method includes the following steps: placing a solder ribbon fixture on at least one solar cell, wherein the fixture includes several positioning grooves, each groove comprising a main body and two extensions. Along a first direction, the two extensions are located at opposite ends of the main body. Along a second direction perpendicular to the first direction, the width of the main body is greater than the width of the extensions, and the width of the extensions is greater than or equal to the width of the solder ribbon. The first direction is along the extension direction of the solder ribbon. Several solder ribbons are placed on the solar cell and positioned within the positioning grooves, with the solder ribbons adhering to the grid lines on the cell surface. The two ends of the solder ribbons are located within the two extensions, thus completing the positioning. Adhesive is applied to the solder ribbons locally, and the solder ribbons are bonded to the solar cell using an adhesive film. This method helps improve the fixation strength and long-term connection reliability of the solder ribbons on the solar cell.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module technology, and in particular to a method for dispensing and coating cell strings. Background Technology

[0002] Photovoltaic modules are the core components of solar power generation systems, typically consisting of multiple photovoltaic cell strings electrically connected and encapsulated via busbars. Each cell string is composed of multiple photovoltaic cells connected in series or parallel via solder ribbons. One of the key steps in the fabrication of the cell string is to reliably connect the solder ribbons to the main grid lines on the surface of the cells to collect and transmit the photocurrent.

[0003] Currently, the mainstream methods for connecting solder ribbons to cell grid lines in the industry mainly include welding, adhesive bonding, and film bonding. While welding (such as infrared welding and hot air welding) can form a stable electrical and mechanical connection, its equipment costs are high, energy consumption is high, and the high-temperature process may cause thermal stress damage to the cell, affecting cell efficiency and reliability. Adhesive bonding uses conductive adhesive, avoiding high-temperature processes, but generally suffers from uneven distribution of conductive fillers, high resistivity after curing, and significant decline in conductivity after long-term aging, leading to increased module series resistance and reduced output power. In contrast, using pre-formed film bonding is a promising solution. This method combines the advantages of low-temperature bonding with the uniformity of film materials, theoretically enabling good electrical interconnection between solder ribbons and main grid lines at a lower cost. However, in practical applications, it has been found that when relying solely on the adhesive force of the film to fix the solder ribbons on the cell surface, the bond strength is often insufficient. In subsequent battery string handling, stacking, and module packaging processes, there is a risk that the solder ribbon may peel off or shift from the surface of the battery cells, which can seriously impair the conductivity and reliability of the battery string and affect the service life of the photovoltaic module.

[0004] Therefore, it is urgent to study a method for dispensing and coating battery strings to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method for bonding and encapsulating battery cells with adhesive film, which significantly improves the fixation strength of the solder ribbon on the battery cells and the long-term connection reliability without introducing the drawbacks of high-temperature welding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A method for dispensing and coating battery strings includes the following steps: S1. Place a welding ribbon fixture on at least one battery cell, wherein the welding ribbon fixture includes a plurality of positioning grooves, each positioning groove including a main body and two extensions. Along a first direction, the two extensions are respectively located at both ends of the main body. Along a second direction perpendicular to the first direction, the width of the main body is greater than the width of the extensions, and the width of the extensions is greater than or equal to the width of the welding ribbon. The first direction is along the length of the welding ribbon. S2. Place several solder strips on the battery cell and position them in the positioning groove. The solder strips are attached to the grid lines on the surface of the battery cell, and the two ends of the solder strips are respectively located in the two extensions to complete the positioning. S3. Apply adhesive to the solder ribbon locally and bond the solder ribbon to the battery cell using an adhesive film.

[0007] As an optional technical solution for battery string dispensing and coating method, S3 includes the following steps: S31. Apply adhesive to the welding strip inside the welding strip tooling; S32. Remove the welding strip fixture from the surface of the battery cell; S33. The solder ribbon is attached to the battery cell using an adhesive film.

[0008] As an optional technical solution for battery string dispensing and coating, the welding ribbon fixture is removed between S31 and S32 after the adhesive has cured and formed adhesive dots.

[0009] As an alternative technical solution for battery string dispensing and coating, in S31, adhesive is dispensed onto the solder strip in the main body.

[0010] As an optional technical solution for a battery string dispensing and coating method, in S31, dispensing is performed at at least two locations, and the distance between the dispensing dots at both ends and the corresponding extensions on the sides is the same.

[0011] As an optional technical solution for a battery string dispensing and coating method, in S31, the solder ribbon in the solder ribbon tooling is dispensed in stages. Along the extension direction of the solder ribbon, the two dispensing positions that are dispensed first are located outside at least one dispensing position that is dispensed later. Before S32, the first dispensing adhesive is cured to form adhesive dots. During the process of S33, the adhesive dispensed later is not cured.

[0012] As an optional technical solution for battery string dispensing and coating method, S3 includes the following steps: S301. The solder ribbon is attached to the battery cell using an adhesive film; S302. Remove the welding strip fixture from the surface of the battery cell; S303. Apply adhesive to both ends of the solder strip.

[0013] As an optional technical solution for a battery string dispensing and coating method, the width of the adhesive film is greater than the width of the solder strip, and the length of the adhesive film is less than the length of the solder strip. In S301, the adhesive film is attached to the inside of the main body and covers the entire solder strip in the width direction.

[0014] As an optional technical solution for battery string dispensing and coating, in S301, adhesive is first dispensed onto the battery cells, and the adhesive film is bonded to the battery cells before the adhesive cures; or, In S301, adhesive is first applied to the solar cell, and after the adhesive cures, the adhesive film is bonded to the solar cell.

[0015] As an optional technical solution for battery string dispensing and coating, in S301, dispensing is performed on the side of the solder ribbon on the battery cell.

[0016] The present invention has at least the following beneficial effects: This invention provides a method for dispensing and coating battery strings, comprising the following steps: placing a solder ribbon fixture on at least one battery cell, wherein the solder ribbon fixture includes a plurality of positioning grooves, each positioning groove comprising a main body and two extensions, wherein along a first direction, the two extensions are respectively located at both ends of the main body; along a second direction perpendicular to the first direction, the width of the main body is greater than the width of the extensions, and the width of the extensions is greater than or equal to the width of the solder ribbon, the first direction being along the length of the solder ribbon. Placing a plurality of solder ribbons on the battery cell and within the positioning grooves, the solder ribbons are adhered to the grid lines on the surface of the battery cell, with both ends of the solder ribbons located within the two extensions, thus completing the positioning. Applying adhesive to the solder ribbons locally and bonding them to the battery cell using an adhesive film.

[0017] Using the above method, several solder ribbons can be installed at once, thereby achieving the connection between several battery cells. The position of the solder ribbons can be constrained by the extension of the positioning groove, thus ensuring the positional accuracy of the solder ribbons. The solder ribbons are fixed to the battery cells by dispensing and bonding adhesive film. The presence of adhesive film reduces the number of dispensing points, which helps to reduce the problem of power loss caused by dispensing. Furthermore, the local dispensing combined with adhesive film can improve the fixation firmness of the solder ribbons on the battery cells and the long-term connection reliability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0019] Figure 1This is a flowchart of the battery string dispensing and coating method in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the welding strip fixture placed on the battery cell in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the solder ribbon placed on the battery cell in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of applying adhesive to the welding strip in the positioning groove in an embodiment of the present invention; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a schematic diagram of the structure of the tooling for removing the welding strip in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the adhesive film being pasted and covering the adhesive dots in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of pasting adhesive film onto un-applied solder ribbon in an embodiment of the present invention; Figure 9 for Figure 8 A magnified view of a section at point B in the middle; Figure 10 This is a schematic diagram of the fixture for removing the welding strip after applying the adhesive film in an embodiment of the present invention; Figure 11 This is a schematic diagram of the adhesive application of solder strips to the adhesive film in an embodiment of the present invention.

[0020] In the picture: 1000, Solar cell; 2000, Solder ribbon; 3000, Adhesive film; 4000, Adhesive dots; 100. Welding strip fixtures; 110. Positioning groove; 111. Main body; 112. Extension. Detailed Implementation

[0021] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0022] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0023] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0024] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0025] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0026] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0027] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0028] like Figures 1 to 9 As shown, this embodiment provides a method for dispensing and coating battery strings, which includes the following steps: S1. Place a welding ribbon fixture 100 on at least one battery cell 1000. The welding ribbon fixture 100 includes a plurality of positioning grooves 110. Each positioning groove 110 includes a main body 111 and two extensions 112. Along a first direction, the two extensions 112 are located at both ends of the main body 111. Along a second direction perpendicular to the first direction, the width of the main body 111 is greater than the width of the extensions 112, and the width of the extensions 112 is greater than or equal to the width of the welding ribbon 2000. The first direction is along the length of the welding ribbon 2000.

[0029] S2. Place several solder ribbons 2000 on the battery cell 1000 and within the positioning groove 110. The solder ribbons 2000 are attached to the grid lines on the surface of the battery cell 1000. The two ends of the solder ribbons 2000 are respectively located within the two extensions 112 to complete the positioning.

[0030] S3. Apply adhesive to the solder ribbon 2000 locally and bond the solder ribbon 2000 to the battery cell 1000 using adhesive film 3000.

[0031] Using the above method, several solder ribbons 2000 can be installed at once, thereby achieving the connection (series or parallel) between several battery cells 1000. The position of the solder ribbon 2000 can be constrained by the extension 112 of the positioning groove 110, thereby ensuring the positional accuracy of the solder ribbon 2000. The solder ribbon 2000 is fixed to the battery cell 1000 by dispensing glue and bonding adhesive film 3000. Due to the presence of adhesive film 3000, the glue dispensing position can be appropriately reduced, thereby helping to reduce the problem of power loss caused by glue dispensing. Furthermore, by combining local glue dispensing with adhesive film 3000, the fixing firmness of the solder ribbon 2000 on the battery cell 1000 and the long-term connection reliability can be improved.

[0032] In some embodiments, a welding ribbon fixture 100 is placed on 24 sequentially arranged battery cells 1000 along a first direction. (Referring to...) Figure 3 As shown, the first direction is along the left and right, and the second direction is along the up and down.

[0033] Combination Figures 2 to 7 As shown, S3 includes the following steps: S31, applying adhesive to the solder ribbon 2000 inside the solder ribbon fixture 100. S32, removing the solder ribbon fixture 100 from the surface of the battery cell 1000. S33, attaching the solder ribbon 2000 to the battery cell 1000 using the adhesive film 3000. Specifically, since the solder ribbon 2000 is positioned by the solder ribbon fixture 100, there is a certain friction between the solder ribbon 2000 and the solder ribbon fixture 100 during the removal process. In some embodiments, between S31 and S32, the solder ribbon fixture 100 is removed after the adhesive has cured to form adhesive dots 4000. Applying adhesive and curing it first ensures a certain connection strength between the solder ribbon 2000 and the battery cell 1000. When removing the solder ribbon fixture 100, the adhesive force generated by the adhesive application overcomes the friction between the solder ribbon fixture 100 and the solder ribbon 2000, thereby ensuring the stability and positional reliability of the solder ribbon 2000. In other embodiments, the solder ribbon fixture 100 can be removed while the adhesive is still wet, and the adhesive film 3000 can be bonded, thus allowing the adhesive to bond the adhesive film 3000 and the battery cell 1000. In this embodiment, during the process of removing the solder ribbon fixture 100, other auxiliary means such as pressing a probe onto the solder ribbon 2000 can be used to prevent the solder ribbon 2000 from shifting. The probe passing through the positioning groove 110 will not affect the solder ribbon fixture 100 moving away from the battery cell 1000.

[0034] In S31, adhesive is applied to the solder ribbon 2000 on the main body 111. Since the width of the main body 111 is greater than that of the solder ribbon 2000, the adhesive is prevented from bonding the battery cell 1000 and the solder ribbon fixture 100, thus reducing the difficulty of adhesive application.

[0035] In S31, adhesive is applied at at least two locations, with the adhesive dots 4000 at both ends equidistant from the corresponding extensions 112. This method ensures that the adhesive application is symmetrical about the midpoint of the solder ribbon 2000, guaranteeing uniform force distribution and preventing displacement of the solder ribbon 2000 relative to the battery cell 100 when the solder ribbon fixture 100 is removed. For example, the distance between the adhesive dot 4000 on the left and the extension 112 on the left is 'a', and the distance between the adhesive dot 4000 on the right and the extension 112 on the right is 'b', where 'a' = 'b', and 'a' ranges from 1mm to 2mm. In some embodiments, in S31, adhesive is applied to the solder ribbon 2000 at three locations, with the middle adhesive dot 4000 located at the center of the solder ribbon 2000.

[0036] In S31, adhesive is applied to the solder ribbon 2000 within the solder ribbon fixture 100 in stages. Along the extension direction of the solder ribbon 2000, the first two adhesive application points are located outside at least one of the later adhesive application points. Before S32, the first adhesive application cures to form adhesive dots 4000. During S33, the later adhesive application does not cure. This method, on the one hand, prevents the solder ribbon 2000 from shifting when removing the solder ribbon fixture 100; on the other hand, it also bonds the adhesive film 3000 to the battery cell 1000 with adhesive, improving the connection strength between the adhesive film 3000 and the battery cell 1000, and enhancing the fixation strength and long-term connection reliability of the solder ribbon 2000 on the battery cell 1000. For example, adhesive is first applied at two application points near the two extensions 112, and then adhesive is applied at the very center of the solder ribbon 2000. In another example, adhesive is first applied at two dispensing locations near the two extensions 112, and then adhesive is applied intermittently at several locations between the two dispensing locations.

[0037] The sidewalls of the main body 111 extend outward to form arc-shaped dispensing sections. Adhesive is dispensed at these sections to prevent the adhesive dots 4000 from bonding the solder ribbon fixture 100 to the battery cell 1000. Dispensing sections are provided on both sidewalls of the main body 111, with the openings of the two dispensing sections facing each other and both pointing towards the solder ribbon 2000. In some embodiments, in S31, the adhesive dots 4000 are located on both sides of the solder ribbon 2000, only bonding the adhesive film 3000 to the battery cell 1000. The adhesive film 3000 is placed on the battery cell 1000 by a robotic arm, with the dispensing sections serving as clearance for the robotic arm. In this embodiment, dispensing sections can also be provided on the sidewalls of the main body 111.

[0038] Combination Figure 2 , Figures 8 to 11 As shown, in some embodiments, S3 includes the following steps: S301. The solder ribbon 2000 is attached to the battery cell 1000 using the adhesive film 3000.

[0039] S302, Remove the welding strip from the surface of the battery cell 1000 using the fixture 100.

[0040] S303. Apply adhesive to both ends of the solder strip 2000.

[0041] First, the solder ribbon 2000 is bonded to the battery cell 1000 using adhesive film 3000, thus preventing the solder ribbon 2000 from shifting during the removal of the solder ribbon fixture 100. Then, by applying adhesive to both ends of the solder ribbon 2000, the defect of weak adhesion of the adhesive film 3000 is compensated for. This localized application of adhesive combined with the adhesive film 3000 improves the fixation strength and long-term connection reliability of the solder ribbon 2000 to the battery cell 1000.

[0042] In some embodiments, the width of the adhesive film 3000 is greater than the width of the solder ribbon 2000, and the length of the adhesive film 3000 is less than the length of the solder ribbon 2000. In S301, the adhesive film 3000 is attached to the main body 111, covering the entire solder ribbon 2000 in the width direction. Attaching the adhesive film 3000 within the solder ribbon fixture 100 provides constraint on the adhesive film 3000, improves bonding accuracy, and ensures effective bonding of the solder ribbon 2000. The width direction is the vertical direction.

[0043] In step S301, adhesive is first applied to the solar cell 1000, and the adhesive film 3000 is bonded to the solar cell 1000 before the adhesive cures. This method, by bonding the adhesive film 3000 with adhesive, improves the bond strength between the adhesive film 3000 and the solar cell 1000, reduces the possibility of separation between the adhesive film 3000 and the solar cell 1000, ensures the constraint of the solder ribbon 2000, and thus guarantees the conductivity of the solder ribbon 2000.

[0044] In other embodiments, in S301, adhesive is first applied to the battery cell 1000, and after the adhesive cures, the adhesive film 3000 is bonded to the battery cell 1000.

[0045] In some embodiments, in S301, adhesive is applied to the side of the solder ribbon 2000 on the battery cell 1000. The adhesive film 3000 and the battery cell 1000 are bonded together, avoiding adhesion to the solder ribbon 2000. This ensures the bonding effect of the adhesive film 3000 while avoiding any impact on the conductivity of the solder ribbon 2000. It should be noted that because the solder ribbon 2000 protrudes from the battery cell 1000, there is a height difference and stress concentration area at the solder ribbon 2000, resulting in weak adhesion. In some embodiments, adhesive is applied to both sides of the solder ribbon 2000 along a direction perpendicular to its extension. Distributing the adhesive dots 4000 on both sides of the solder ribbon 2000 can fill the gap between the adhesive film 3000 and the battery cell 1000 to a certain extent, and can generate adhesive force from both sides simultaneously, improving the bonding effect of the adhesive film 3000. In this embodiment, an adhesive application area can also be provided on the side wall of the main body 111.

[0046] In other embodiments, in S301, the adhesive covers the entire solder ribbon 2000 in the width direction. The adhesive simultaneously bonds the solder ribbon 2000, the adhesive film 3000, and the battery cell 1000 to better fill the gaps between the adhesive film 3000, the battery cell 1000, and the solder ribbon 2000.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for dispensing and coating batteries into strings, characterized in that, Includes the following steps: S1. A welding ribbon fixture (100) is placed on at least one battery cell (1000), wherein the welding ribbon fixture (100) includes a plurality of positioning grooves (110), the positioning grooves (110) include a main body (111) and two extensions (112), the two extensions (112) are respectively located at both ends of the main body (111) along a first direction; along a second direction perpendicular to the first direction, the width of the main body (111) is greater than the width of the extensions (112), and the width of the extensions (112) is greater than or equal to the width of the welding ribbon (2000), the first direction being along the length direction of the welding ribbon (2000); S2. Place several solder strips (2000) on the battery cell (1000) and in the positioning groove (110). The solder strips (2000) are attached to the grid lines on the surface of the battery cell (1000). The two ends of the solder strips (2000) are respectively located in the two extensions (112) to complete the positioning. S3. Apply adhesive to the solder ribbon (2000) locally and bond the solder ribbon (2000) to the battery cell (1000) through the adhesive film (3000).

2. The battery string dispensing and coating method according to claim 1, characterized in that, S3 includes the following steps: S31. Apply adhesive to the welding strip (2000) inside the welding strip tooling (100); S32. Remove the welding strip fixture (100) from the surface of the battery cell (1000); S33. The solder ribbon (2000) is attached to the battery cell (1000) through the adhesive film (3000).

3. The battery string dispensing and coating method according to claim 2, characterized in that, Between S31 and S32, wait for the adhesive to cure and form adhesive dots (4000) before removing the welding strip fixture (100).

4. The battery string dispensing and coating method according to claim 2, characterized in that, In S31, adhesive is applied to the solder strip (2000) on the main body (111).

5. The battery string dispensing and coating method according to claim 4, characterized in that, In S31, adhesive is applied at at least two locations, and the distance between the adhesive dots (4000) at both ends and the extension (112) on the corresponding side is the same.

6. The battery string dispensing and coating method according to claim 2, characterized in that, In S31, the solder ribbon (2000) in the solder ribbon tool (100) is dispensed in stages. Along the extension direction of the solder ribbon (2000), the two dispensing positions of the first dispensing are located outside at least one dispensing position of the later dispensing. Before S32, the first dispensing adhesive is cured to form adhesive dots (4000). During the process of S33, the later dispensing adhesive is not cured.

7. The battery string dispensing and coating method according to claim 1, characterized in that, S3 includes the following steps: S301, The solder ribbon (2000) is attached to the battery cell (1000) using the adhesive film (3000); S302, Remove the welding strip fixture (100) from the surface of the battery cell (1000); S303. Apply adhesive to both ends of the solder strip (2000).

8. The battery string dispensing and coating method according to claim 7, characterized in that, The width of the adhesive film (3000) is greater than the width of the solder strip (2000), and the length of the adhesive film (3000) is less than the length of the solder strip (2000). In S301, the adhesive film (3000) is attached to the body part (111) and covers the entire solder strip (2000) in the width direction of the solder strip (2000).

9. The battery string dispensing and coating method according to claim 7, characterized in that, In S301, adhesive is first applied to the solar cell (1000), and the adhesive film (3000) is bonded to the solar cell (1000) before the adhesive cures; or, In S301, adhesive is first applied to the cell (1000), and after the adhesive has cured, the adhesive film (3000) is bonded to the cell (1000).

10. The battery string dispensing and coating method according to claim 9, characterized in that, In S301, adhesive is applied to the side of the solder ribbon (2000) on the cell (1000).

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