Battery string dispensing method

Abstract

This invention relates to the field of photovoltaic module technology, specifically disclosing a method for dispensing adhesive onto a battery string. The method includes the following steps: placing solder ribbons on the battery cells to ensure adhesion between the ribbons and the grid lines on the cells; bonding the solder ribbons to the cells using an adhesive film, and pre-marking dispensing positions on the cells; transporting and translating the cells, along with the solder ribbons and adhesive film, to a dispensing platform; dispensing adhesive onto the designated positions on the cells; wherein, a dispensing head on the dispensing platform moves above the dispensing position and dispenses adhesive there, or the dispensing platform moves so that the dispensing head is positioned above the dispensing position, and then the dispensing head dispenses adhesive there; the adhesive on the cells cures and forms adhesive dots. This method improves the firmness of fixing the solder ribbons to the cells and the long-term reliability of the connection, reducing the problem of reduced overall conductivity due to adhesive dispensing.

Description

Technical Field

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

[0002] In photovoltaic modules, photovoltaic panels are typically composed of multiple cell strings interconnected by busbars, while cell strings are composed of multiple cells interconnected by solder ribbons. During manufacturing, solder ribbons need to be laid on the surface of the cells to achieve a reliable electrical connection with the grid lines on the cells. Currently, the commonly used connection methods in the industry mainly include welding, adhesive bonding, and encapsulated film bonding. While welding provides a strong connection, it is costly and can potentially cause thermal damage to the cells due to high temperatures. Adhesive bonding suffers from poor conductivity after the conductive adhesive cures, and connecting the entire solder ribbon by adhesive application can affect the overall conductivity efficiency of the cell string. In contrast, encapsulated film bonding is widely regarded as a potential alternative in the industry due to its lower cost and good process adaptability.

[0003] However, in practical applications, when only adhesive film is used to attach and fix the solder ribbons on the solar cells, the adhesive film's adhesion to the solder ribbons is limited. This can easily lead to the solder ribbons not being firmly fixed to the surface of the solar cells, posing a risk of the solder ribbons detaching from the solar cell surface. This film detachment can cause the solder ribbons to separate from the grid lines on the surface of the solar cells, resulting in interrupted electrical connections or increased contact resistance, thereby reducing the conductivity of the solar cell string and the overall power generation performance of the photovoltaic module.

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

[0005] The purpose of this invention is to provide a battery string dispensing method to solve the problems of poor solder ribbon fixation and conductivity in the existing adhesive film connection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A battery string dispensing method, comprising: S1. Place solder ribbons on the solar cell so that the solder ribbons adhere to the grid lines on the solar cell; S2. Adhere the welding ribbon to the battery cell using adhesive film, and leave the adhesive application area on the battery cell; S3. Transport and move the battery cells, along with the solder ribbon and adhesive film, to the dispensing platform. S4. Apply adhesive to the dispensing position on the battery cell; wherein, the dispensing head on the dispensing platform moves to above the dispensing position and applies adhesive at the dispensing position, or the dispensing platform moves so that the dispensing head is above the dispensing position, and then the dispensing head applies adhesive at the dispensing position. S5. The adhesive on the battery cell cures and forms adhesive dots.

[0007] As an optional technical solution for battery string dispensing, in S2, each solder ribbon corresponds to at least one adhesive film. When only one adhesive film is applied, dispensing positions are reserved at both ends of the adhesive film along the extension direction of the solder ribbon. When at least two adhesive films are applied, dispensing positions are reserved on the outer sides of the two outermost adhesive films and between two adjacent adhesive films along the extension direction of the solder ribbon.

[0008] As an optional technical solution for battery string dispensing, the adhesive film is provided with dispensing holes, and a dispensing position is formed at the location of the dispensing holes. In S4, adhesive is first dispensed in the dispensing holes, and then adhesive is dispensed at other dispensing positions.

[0009] As an optional technical solution for battery string dispensing, each adhesive film is provided with several dispensing holes. In S2, during the process of bonding the adhesive film to the battery cell, the position of the adhesive film is controlled so that the adhesive film covers the entire solder strip in the width direction, and the dispensing holes are located on the side of the solder strip.

[0010] As an optional technical solution for battery string dispensing, the grid lines include mutually perpendicular fine grids and main grids. The main grid is used to connect several fine grids in series. The solder ribbon and the main grid are bonded together. In S2, the dispensing holes are located in the interval between adjacent fine grids.

[0011] As an alternative technical solution for battery string dispensing, the length of the adhesive film is shorter than that of the solder ribbon. In S2, adhesive is dispensed onto the solder ribbon so that the adhesive bonds the solder ribbon to the battery cell.

[0012] As an optional technical solution for battery string dispensing, in S2, dispensing positions are reserved on both sides of the adhesive film in the direction perpendicular to the extension of the solder strip.

[0013] As an alternative technical solution for battery string dispensing, the adhesive film gradually thins on both sides along the width direction of the solder strip, and the adhesive dots partially cover the sides of the gradually thinning adhesive film and partially lie on the battery cell.

[0014] As an alternative technical solution for battery string dispensing, in S2, adhesive is first dispensed on both sides of the solder strip on the battery cell along the extension direction perpendicular to the solder strip, and then the adhesive film is pasted.

[0015] As an optional technical solution for battery string dispensing, in S1, a soldering ribbon fixture is first placed on the battery cell, and then the soldering ribbon is placed on the battery cell and located within the soldering ribbon fixture, with the soldering ribbon being limited by the soldering ribbon fixture.

[0016] The present invention has at least the following beneficial effects: This invention provides a method for dispensing adhesive into battery strings, the method comprising the following steps: S1. Place solder ribbons on the solar cells so that the solder ribbons adhere to the grid lines on the solar cells.

[0017] S2. Adhere the welding ribbon to the battery cell using the adhesive film, and leave the adhesive application area on the battery cell.

[0018] S3. Transport and move the battery cells, along with the solder ribbon and adhesive film, to the dispensing platform.

[0019] S4. Apply adhesive to the dispensing position on the battery cell; wherein, the dispensing head on the dispensing platform moves to above the dispensing position and applies adhesive at the dispensing position, or the dispensing platform moves so that the dispensing head is above the dispensing position, and then the dispensing head applies adhesive at the dispensing position.

[0020] S5. The adhesive on the battery cell cures and forms adhesive dots.

[0021] By using both adhesive film and glue to fix the solder ribbon, the firmness of fixing the solder ribbon to the battery cell and the long-term connection reliability are significantly improved. In particular, the presence of adhesive film reduces the number of glue application points, which helps to reduce the problem of reduced overall conductivity caused by glue application. In addition, applying the film first and then applying the glue helps to ensure the accuracy of the relative position of the solder ribbon and the battery cell. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a flowchart of the battery string dispensing method in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure in an embodiment of the present invention, showing the adhesive film being attached to the solder ribbon; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram of the structure of the adhesive dots covering the adhesive film in an embodiment of the present invention.

[0024] In the picture: 1000, Solar cell; 2000, Grid line; 3000, Solder ribbon; 4000, Adhesive film; 4100, Dispensing hole; 5000, Adhesive dot. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figures 1 to 4 As shown, this embodiment provides a battery string dispensing method, which includes the following steps: S1. Place solder ribbon 3000 on the cell 1000 so that the solder ribbon 3000 and the grid lines 2000 on the cell 1000 are attached.

[0033] S2. The solder ribbon 3000 is bonded to the solar cell 1000 using the adhesive film 4000, with pre-drilled application points on the solar cell 1000. The adhesive film 4000 and the solder ribbon 3000 extend in the same direction. (Reference) Figure 3 The extension direction of the 3000 welding strip is the length direction.

[0034] S3. Move the battery cell 1000 together with the solder ribbon 3000 and the adhesive film 4000 to the dispensing platform.

[0035] S4. Apply adhesive to the dispensing position on the battery cell 1000; wherein, the dispensing head on the dispensing platform moves to above the dispensing position and applies adhesive at the dispensing position, or the dispensing platform moves so that the dispensing head is above the dispensing position, and then the dispensing head applies adhesive at the dispensing position.

[0036] S5, the adhesive on the battery cell 1000 cures and forms adhesive dots 5000.

[0037] By using a dual-fixation method of adhesive film 4000 and adhesive dispensing to secure the solder ribbon 3000, the strength and long-term connection reliability of fixing the solder ribbon 3000 to the solar cell 1000 are significantly improved without increasing cost or process complexity. The presence of adhesive film 4000 reduces the number of dispensing points, thus helping to mitigate the impact of dispensing on overall conductivity. Furthermore, applying the film before dispensing helps ensure the accuracy of the relative position of the solder ribbon 3000 and the solar cell 1000. The method of translating the solder ribbon to the dispensing platform prevents displacement of the solder ribbon 3000.

[0038] It should be noted that the adhesive film 4000 covers the entire solder ribbon 3000 in its width direction. The adhesive used for dispensing is conductive. The conductive adhesive is used to achieve the electrical connection between the solder ribbon 3000 and the gate line 2000, minimizing the impact on the conductivity of the solder ribbon 3000.

[0039] In S2, each solder ribbon 3000 corresponds to at least one adhesive film 4000. When only one adhesive film 4000 is adhered, adhesive application positions are reserved at both ends of the adhesive film 4000 along the extension direction of the solder ribbon 3000. When at least two adhesive films 4000 are adhered, adhesive application positions are reserved on the outer sides of the two outermost adhesive films 4000 and between two adjacent adhesive films 4000 along the extension direction of the solder ribbon 3000. For example, when two adhesive films 4000 are adhered to each solder ribbon 3000, three adhesive dots 5000 are formed on the battery cell 1000, with two adhesive dots 5000 located at the two ends of the two adhesive films 4000 respectively, and the third adhesive dot 5000 located in the middle of the two adhesive films 4000.

[0040] In some embodiments, the adhesive film 4000 is provided with a dispensing hole 4100, forming a dispensing position. In S4, adhesive is first dispensed into the dispensing hole 4100, and then dispensed at other dispensing positions. The dispensing hole 4100 penetrates the adhesive film 4000 in the thickness direction. In the above method, adhesive is dispensed at the dispensing hole 4100, forming an adhesive dot 5000 with a columnar structure. The bottom of the adhesive dot 5000 is bonded to the battery cell 1000, and the periphery is bonded to the adhesive film 4000; the conventional two-dimensional bonding is improved to a three-dimensional connection, significantly increasing the connection strength. The height of the adhesive dot 5000 is less than or equal to the thickness of the adhesive film 4000. Further, the dispensing hole 4100 is a conical hole. The opening of the dispensing hole 4100 faces away from the battery cell 1000. In other embodiments, the dispensing hole 4100 can be replaced by a dispensing groove that penetrates the adhesive film 4000 along the thickness direction and also penetrates the adhesive film 4000 along the width direction. Excess adhesive will flow outward to avoid the formation of an accumulation that exceeds the height of the adhesive film 4000.

[0041] Each adhesive film 4000 has several dispensing holes 4100. In S2, during the process of bonding the adhesive film 4000 to the battery cell 1000, the position of the adhesive film 4000 is controlled so that, in the width direction of the solder ribbon 3000, the adhesive film 4000 covers the entire solder ribbon 3000, and the dispensing holes 4100 are located beside the solder ribbon 3000. This method avoids bonding the solder ribbon 3000, thereby avoiding any impact on the solder ribbon 3000. During dispensing, the adhesive will not cover or damage the solder ribbon 3000, thus maintaining the connection effect between the solder ribbon 3000 and the grid line 2000, and thus ensuring the conductivity efficiency of the solder ribbon 3000.

[0042] The grid line 2000 includes mutually perpendicular fine grids and main grids. The main grid is used to connect several fine grids in series. The solder ribbon 3000 is bonded to the main grid. In S2, the dispensing hole 4100 is located in the gap between adjacent fine grids. The above method avoids affecting the fine grids. During dispensing, the adhesive will not cover or damage the fine grids and main grids, thus maintaining the complete conductive path of the grid line 2000, ensuring that the current collection and transmission efficiency is not affected, and thus guaranteeing the conductivity efficiency of the solder ribbon 3000. In addition, the position of the dispensing hole 4100 precisely corresponds to the fine grid spacing, allowing the adhesive to be evenly distributed, avoiding local stress concentration, reducing the generation of bubbles or voids, thereby improving the bonding quality and reliability. Finally, although the cells 1000 between the fine grids can generate photogenerated carriers, their carrier collection efficiency decreases sharply with the increase of distance from the fine grids. This is a region with relatively low photoelectric conversion contribution in the cells 1000. Dispensing adhesive here minimizes the shading of the photoelectric conversion region of the cells 1000, helping to maintain or improve the photoelectric conversion efficiency of the module. In some embodiments, the adhesive film 4000 is provided with adhesive holes 4100 corresponding to the gaps between every two fine grids.

[0043] Two dispensing holes 4100 are grouped together, and along the width direction of the solder strip 3000, the two dispensing holes 4100 in the same group are distributed on both sides of the solder strip 3000. The above method generates uniform adhesive force on both sides simultaneously, improving the bonding effect between the adhesive film 4000 and the battery cell 1000.

[0044] In some embodiments, the dispensing hole 4100 is located above the solder ribbon 3000 and covers the entire solder ribbon 3000. The solder ribbon 3000, the adhesive film 4000, and the battery cell 1000 are bonded together with adhesive.

[0045] The adhesive film 4000 is shorter than the solder ribbon 3000. In step S2, adhesive is applied to the solder ribbon 3000 to bond it to the cell 1000. This creates a direct connection point between the solder ribbon 3000 and the cell 1000 for the high-strength adhesive, forming a strong bond at critical locations that surpasses the performance of the adhesive film 4000. This significantly enhances the connection strength at the end of the solder ribbon 3000, preventing it from detaching and improving the reliability of the battery string connection.

[0046] Furthermore, the end of the adhesive film 4000 is tapered, and the adhesive dots 5000 at the end of the adhesive film 4000 are partially located on the adhesive film 4000 and partially located on the exposed solder ribbon 3000. This method allows for a smooth transition between the tapered end of the adhesive film 4000 and the higher-strength adhesive application area, avoiding stress concentration at the end of the solder ribbon 3000 and improving the bonding effect. In other embodiments, the end of the adhesive film 4000 has a finger-like, interlaced shape. The adhesive dots 5000 at the end of the adhesive film 4000 are partially located in the finger-like gaps of the adhesive film 4000 and partially located on the solder ribbon 3000 at the end of the adhesive film 4000, forming an interlaced shape, which improves the connection strength between the solder ribbon 3000, the adhesive film 4000, and the battery cell 1000.

[0047] There is a height difference and a stress concentration area at the bonding point between the solder ribbon 3000 and the grid line 2000, resulting in weak adhesion. Therefore, in step S2, adhesive is first applied to both sides of the solder ribbon 3000 on the cell 1000 along a direction perpendicular to the extension of the solder ribbon 3000, and then the adhesive film 4000 is attached. In step S2, the adhesive application points are simultaneously located on both sides of the grid line, where the solder ribbon 3000 is bonded to the main grid. In this embodiment, the adhesive dots 5000 are distributed on both sides of the solder ribbon 3000, which can fill the gap between the adhesive film 4000 and the cell 1000 to a certain extent, reducing or eliminating the stress concentration problem caused by the height difference, and generating adhesive force from both sides simultaneously, improving the adhesion effect of the adhesive film 4000. In this embodiment, adhesive holes 4100 can be provided on the adhesive film 4000, or they can be omitted; the adhesive holes 4100 will not interfere with the method of this embodiment.

[0048] In step S2, adhesive dots are pre-drilled on both sides of the adhesive film 4000 in the direction perpendicular to the extension of the solder ribbon 3000. Adhesive dots 5000 partially cover one end of the adhesive film 4000 in the width direction and partially lie on the solar cell 1000, thereby pressing the adhesive film 4000 onto both sides of the solder ribbon 3000 in the width direction and fixing the adhesive film 4000 to the solar cell 1000. Further, along the width direction of the solder ribbon 3000, the adhesive film 4000 gradually thins on both sides, and adhesive dots 5000 partially cover the thinning sides of the adhesive film 4000 and partially lie on the solar cell 1000. Specifically, along the width direction of the solder ribbon 3000, the adhesive film 4000 includes a central region and end regions on both sides of the central region. The central region has a uniform thickness, and the end regions gradually thin away from the central region. After dispensing, the highest point of the adhesive dot 5000 does not exceed the middle area; that is, the position where the distance between the adhesive dot 5000 and the battery cell 1000 is greatest is not higher than the middle area of ​​the adhesive film 4000. In other embodiments, along the width direction of the solder ribbon 3000, the two sides of the adhesive film 4000 are in a finger-like staggered state.

[0049] In step S1, a soldering fixture is first placed on the battery cell 1000, and then a soldering ribbon 3000 is placed on the battery cell 1000, located within the soldering fixture. The soldering ribbon 3000 is positioned by the soldering fixture. The soldering fixture enables rapid and precise positioning of the soldering ribbon 3000, fundamentally ensuring the alignment accuracy between the soldering ribbon 3000 and the grid lines 2000 of the battery cell 1000. In some embodiments, after applying adhesive to the middle position of the soldering ribbon 3000, the soldering fixture is removed, and then step S2 is executed. The soldering fixture includes a positioning groove. The positioning groove extends along its length and includes a main body and two extensions respectively connected to both sides of the main body along its length. The width of the main body is greater than the width of the extensions and greater than the width of the soldering ribbon 3000. The width of the extensions is equal to the width of the soldering ribbon 3000. The soldering ribbon 3000 is placed in the positioning groove, with both ends of the soldering ribbon 3000 placed within the extensions to achieve width-direction positioning. When the welding ribbon fixture is not removed, the adhesive application point is located inside the main body to avoid bonding the welding ribbon fixture and the battery cell.

[0050] 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 adhesive into battery strings, characterized in that, include: S1. Place solder ribbon (3000) on the cell (1000) so that the solder ribbon (3000) and the grid lines (2000) on the cell (1000) are attached; S2. The solder ribbon (3000) is bonded to the battery cell (1000) through the adhesive film (4000), and the adhesive application position is reserved on the battery cell (1000); S3. Transport and move the battery cell (1000) together with the solder ribbon (3000) and the adhesive film (4000) to the dispensing platform; S4. Apply adhesive to the dispensing position on the battery cell (1000); wherein, the dispensing head on the dispensing platform moves to above the dispensing position and applies adhesive at the dispensing position, or the dispensing platform moves so that the dispensing head is above the dispensing position, and then the dispensing head applies adhesive at the dispensing position. S5, the glue on the battery cell (1000) cures and forms glue dots (5000).

2. The battery string dispensing method according to claim 1, characterized in that, In S2, each solder strip (3000) corresponds to at least one adhesive film (4000). When only one adhesive film (4000) is applied, adhesive application positions are reserved at both ends of the adhesive film (4000) along the extension direction of the solder strip (3000). When at least two adhesive films (4000) are applied, adhesive application positions are reserved on the outer sides of the two outermost adhesive films (4000) and between the two adjacent adhesive films (4000) along the extension direction of the solder strip (3000).

3. The battery string dispensing method according to claim 2, characterized in that, The adhesive film (4000) is provided with a dispensing hole (4100), and a dispensing position is formed at the location of the dispensing hole (4100). In S4, the adhesive is first dispensed in the dispensing hole (4100), and then the adhesive is dispensed at other dispensing positions.

4. The battery string dispensing method according to claim 3, characterized in that, Each adhesive film (4000) has several dispensing holes (4100). In S2, during the process of bonding the adhesive film (4000) to the battery cell (1000), the position of the adhesive film (4000) is controlled so that the adhesive film (4000) covers the entire solder strip (3000) in the width direction of the solder strip (3000), and the dispensing holes (4100) are located on the side of the solder strip (3000).

5. The battery string dispensing method according to claim 4, characterized in that, The grid line (2000) includes mutually perpendicular fine grids and main grids. The main grid is used to connect several fine grids in series. The solder strip (3000) is bonded to the main grid. In S2, the dispensing hole (4100) is located in the interval between adjacent fine grids.

6. The battery string dispensing method according to claim 2, characterized in that, The length of the adhesive film (4000) is less than that of the solder ribbon (3000). In S2, adhesive is applied to the solder ribbon (3000) to bond the solder ribbon (3000) to the cell (1000).

7. The battery string dispensing method according to claim 1, characterized in that, In S2, in the direction perpendicular to the extension of the solder strip (3000), dispensing positions are reserved on both sides of the adhesive film (4000).

8. The battery string dispensing method according to claim 7, characterized in that, Along the width direction of the solder strip (3000), the two sides of the adhesive film (4000) are gradually thinning, and the adhesive dots (5000) partially cover the sides of the gradually thinning adhesive film (4000) and partially lie on the solar cell (1000).

9. The battery string dispensing method according to any one of claims 1-8, characterized in that, In S2, along the extension direction perpendicular to the solder strip (3000), adhesive is first applied to both sides of the solder strip (3000) on the cell (1000), and then adhesive film (4000) is pasted.

10. The battery string dispensing method according to any one of claims 1-8, characterized in that, In S1, a welding ribbon fixture is first placed on the battery cell (1000), and then the welding ribbon (3000) is placed on the battery cell (1000) and located inside the welding ribbon fixture. The welding ribbon (3000) is limited by the welding ribbon fixture.

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