Photovoltaic module correction method and correction device

Abstract

The present application relates to the field of photovoltaic technology, and discloses a photovoltaic module correction method and a correction device. The photovoltaic module correction method comprises the following steps: S1, grabbing and moving the adhesive film on the cell module to separate the adhesive film from the cell module; S2, visually detecting the adhesive film and the cell module to position the through hole on the adhesive film and the bus bar on the cell module; S3, moving the adhesive film to adjust the position of the bent part of the bus bar in the through hole; S4, moving the adhesive film to attach the adhesive film to the surface of the cell module; and S5, pulling the bent part to one side of the inner wall of the through hole to lengthen the bent part. The photovoltaic module correction method is simple and convenient to implement, does not affect the subsequent straightening of the bent part and tearing off of the adhesive film, and can prevent the rear-end process from failing to form an electrical connection between the bus bar and the junction box due to insufficient length of the bent part when installing the junction box.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to a method and apparatus for correcting photovoltaic modules. Background Technology

[0002] A photovoltaic (PV) module is a power generation device that produces direct current (DC) when exposed to sunlight. It consists of thin, solid-state photovoltaic cells made of semiconductor materials. A PV module includes a laminate, which comprises a stacked glass cover, an upper encapsulating film, a cell string, and a lower encapsulating film. Multiple cell strings in the cell string are interconnected by busbars. The ends of the busbars are bent to form vertical bends. The lower encapsulating film has through-holes corresponding to these bends. During the lamination process, the lower encapsulating film is laid on the cell string, with the bends passing through the through-holes in the lower encapsulating film.

[0003] During the manufacturing process of photovoltaic modules, after the lower encapsulation film is laid on the cell string, the bent sections at the through-holes of the lower encapsulation film need to be bent to allow for the application of high-temperature tape, thereby reducing the impact of adhesive overflow in subsequent lamination processes. However, when photovoltaic modules are received, the bent sections of the busbars are of varying lengths. The high-temperature tape tends to completely cover these bent sections during application, which in turn affects the subsequent processes of straightening the bent sections and removing the high-temperature tape. Summary of the Invention

[0004] The purpose of this invention is to provide a photovoltaic module straightening method and device to solve the problem in the prior art where the bending sections of the busbars of photovoltaic modules are of varying lengths when they arrive at the factory. High-temperature tape can easily completely cover the bending sections, which in turn affects the subsequent process of straightening the bending sections and removing the high-temperature tape.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, the present invention provides a photovoltaic module correction method, comprising the following steps:

[0007] S1. Grab and move the adhesive film on the battery cell assembly to separate the adhesive film from the battery cell assembly;

[0008] S2. Visually inspect the adhesive film and the battery cell assembly to locate the through holes on the adhesive film and the busbars on the battery cell assembly;

[0009] S3. Move the adhesive film to adjust the position of the bent portion of the busbar within the through hole;

[0010] S4. Move the adhesive film to attach it to the surface of the battery cell assembly;

[0011] S5. Pull the bent portion toward one side of the inner wall of the through hole to lengthen the bent portion.

[0012] As an alternative to the above-mentioned photovoltaic module correction method, in step S1, after grasping and moving the adhesive film, the height of the through hole in the adhesive film is lower than or equal to the height of the top of the bent portion.

[0013] As an alternative to the above-mentioned photovoltaic module correction method, step S2 further includes: during visual inspection of the adhesive film and the battery cell assembly, shining light on the through-hole area of ​​the adhesive film.

[0014] As an alternative to the above-mentioned photovoltaic module correction method, step S4 further includes: moving the adhesive film to a position close to the surface of the battery cell module by means of a gripper mechanism, and then scraping the adhesive film onto the battery cell module by means of a scraper mechanism.

[0015] As an optional solution to the above-mentioned photovoltaic module correction method, when the scraper mechanism scrapes the adhesive film onto the solar cell module, it further includes:

[0016] A movable light source is used to shine stripe light onto the surface of the above-mentioned adhesive film;

[0017] A movable camera is used to detect whether the area of ​​the above-mentioned film illuminated by the above-mentioned strip light is distorted.

[0018] The twisted area of ​​the adhesive film is adjusted by the aforementioned gripper mechanism to make the adhesive film smooth.

[0019] As an alternative to the above-mentioned photovoltaic module correction method, in step S5, after the above-mentioned bent portion is lengthened, the above-mentioned bent portion is inclined toward the side closer to the inner wall of the above-mentioned through hole.

[0020] As an alternative to the above-mentioned photovoltaic module correction method, step S5 further includes: pressing the area of ​​the busbar near the inner wall of the through hole by a pressing mechanism, and then clamping and stretching the bent part by a gripper mechanism.

[0021] As an optional solution to the above photovoltaic module correction method, after step S5, the following step is also included:

[0022] S6. Press the bent portion to press the bent portion onto the adhesive film;

[0023] S7. Apply a film to the through-hole position of the adhesive film so that the film can block the through-hole of the adhesive film.

[0024] As an alternative to the above-mentioned photovoltaic module correction method, step S6 further includes: guiding and correcting the position of the bent portion relative to the through hole through a guiding mechanism, and then pressing the bent portion onto the adhesive film through a pressing mechanism.

[0025] On the other hand, the present invention provides a correction device used in the photovoltaic module correction method described above, the correction device comprising a frame and a component disposed on the frame:

[0026] A fixed camera is used to photograph the through-holes of the adhesive film and the busbars of the battery cell assembly.

[0027] A first horizontal drive assembly is provided with a first movable belt and a second movable belt rotatably mounted on its drive end. The first horizontal drive assembly is capable of driving the first movable belt and the second movable belt to move in the horizontal direction, respectively. A movable camera is mounted on the first movable belt, and a movable light source is mounted on the second movable belt.

[0028] The second horizontal driving assembly has a suction cup at its driving end, and the second horizontal driving assembly can drive the suction cup to move along the horizontal direction; the suction cup is used to adsorb the adhesive film on the battery cell assembly.

[0029] The beneficial effects of this invention are as follows:

[0030] This photovoltaic module straightening method is simple and convenient to implement. By grasping and moving the adhesive film on the solar cell module, the adhesive film can be separated from the solar cell module. After adjusting the position of the adhesive film relative to the solar cell module, the adhesive film is then attached to the solar cell module. This adjusts the position of the bent part within the through-hole of the adhesive film, facilitating the subsequent stretching of the bent part. This ensures that the bent part is long enough to cover the surface of the adhesive film, preventing the adhesive film from completely covering the bent part when the through-hole of the adhesive film is blocked later. This makes it easier to lift the bent part and remove the adhesive film. Therefore, it does not easily affect the straightening of the bent part and the removal of the adhesive film, thus benefiting the production and manufacturing of photovoltaic modules. In addition, by stretching the bent part, its straightening length will be significantly increased compared to before, preventing insufficient bending part length during the installation of the junction box in the later process, which would prevent the busbar from being unable to form an electrical connection with the junction box.

[0031] The correction device of the present invention is used in the photovoltaic module correction method described above. The correction device includes a frame and a fixed camera, a first horizontal drive assembly, and a second horizontal drive assembly mounted on the frame. The driving end of the second horizontal drive assembly is provided with a suction cup. The second horizontal drive assembly can drive the suction cup to move horizontally, and the suction cup is used to adsorb the adhesive film on the solar cell assembly. Under the drive of the second horizontal drive assembly, the suction cup can move the adhesive film horizontally, thereby adjusting the position of the adhesive film relative to the solar cell assembly. Simultaneously, the fixed camera is used to photograph the through-holes of the adhesive film and the busbars of the solar cell assembly, visually positioning the through-holes and busbars to facilitate adjustment of their positions. This allows for the subsequent elongation of the bent portion of the busbar and facilitates the straightening of the bent portion and the removal of the adhesive film. Meanwhile, the drive end of the first horizontal drive component is rotatably equipped with a first movable belt and a second movable belt. The first horizontal drive component can drive the first movable belt and the second movable belt to move in the horizontal direction respectively. A movable camera is provided on the first movable belt and a movable light source is provided on the second movable belt. Thus, both the movable camera and the movable light source can move in the horizontal direction, and the rotation angle of the movable camera and the movable light source is adjustable. This allows the movable camera to assist in shooting the film and the battery cell assembly, and the movable light source to provide illumination, thereby reducing the difficulty of visual inspection. Attached Figure Description

[0032] Figure 1 This is a schematic flowchart of the photovoltaic module correction method provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the correction device provided in an embodiment of the present invention;

[0034] Figure 3 This is a partial structural schematic diagram of a photovoltaic module provided in an embodiment of the present invention.

[0035] In the picture:

[0036] 1. Frame; 2. Fixed camera; 3. First horizontal drive assembly; 31. First movable belt; 311. Movable camera; 32. Second movable belt; 321. Movable light source; 4. Second horizontal drive assembly; 41. Suction cup; 5. Adhesive film; 51. Through hole; 6. Busbar; 61. Bending part. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] Example 1

[0042] This embodiment provides a photovoltaic module correction method for correcting the position of the bent portion 61 of the busbar 6 within the through-hole 51 of the adhesive film 5, such as... Figure 1 and Figure 3 As shown, the photovoltaic module correction method includes the following steps:

[0043] S1. Grab and move the adhesive film 5 on the battery cell assembly so that the adhesive film 5 separates from the battery cell assembly;

[0044] S2, visually inspect the adhesive film 5 and the battery cell assembly to locate the through-hole 51 on the adhesive film 5 and the busbar 6 on the battery cell assembly;

[0045] S3. Move the adhesive film 5 to adjust the position of the bent part 61 of the busbar 6 within the through hole 51;

[0046] S4. Move the adhesive film 5 to attach the adhesive film 5 to the surface of the battery cell assembly;

[0047] S5. Pull the bent portion 61 to one side of the inner wall of the through hole 51 to lengthen the bent portion 61.

[0048] The photovoltaic module correction method provided in this embodiment is simple and convenient to implement. By grasping and moving the adhesive film 5 on the cell module, the adhesive film 5 can be separated from the cell module. After adjusting the position of the adhesive film 5 relative to the cell module, the adhesive film 5 is then attached to the cell module. This adjusts the position of the bent portion 61 within the through hole 51 of the adhesive film 5, facilitating the subsequent stretching of the bent portion 61. This ensures that a sufficiently long bent portion 61 can press against the surface of the adhesive film 5, thereby enabling subsequent sealing with a film. When the through-hole 51 of the adhesive film 5 is held, the film will not completely cover the bent part 61, making it easier to lift the bent part 61 and remove the film. Therefore, it is less likely to affect the subsequent straightening of the bent part 61 and the removal of the film, which is beneficial to the production and manufacturing of photovoltaic modules. In addition, by lengthening the bent part 61, its straightening length will be significantly increased compared to before, preventing the downstream process from failing to form an electrical connection between the busbar 6 and the junction box due to insufficient length of the bent part 61 when installing the junction box.

[0049] In step S1, after the adhesive film 5 is grasped and moved, the height of the through hole 51 of the adhesive film 5 is lower than or equal to the height of the top of the bent portion 61. Specifically, when the photovoltaic module is received, the adhesive film 5 is in a state of covering the battery cell module, and the bent portion 61 of the busbar 6 is located in the through hole 51 of the adhesive film 5. Thus, when the adhesive film 5 is grasped and moved, by making the height of the through hole 51 of the adhesive film 5 lower than or equal to the height of the top of the bent portion 61, the bent portion 61 of the busbar 6 can be prevented from detaching from the through hole 51 of the adhesive film 5. Therefore, when the adhesive film 5 is placed on the battery cell module again, the bent portion 61 of the busbar 6 can be prevented from directly contacting the adhesive film 5 and being bent.

[0050] Furthermore, in step S2, when visually inspecting the adhesive film 5 and the battery cell assembly, the through-hole 51 area of ​​the adhesive film 5 is illuminated, so as to facilitate the fixed camera 2 to observe and identify the through-hole 51 of the adhesive film 5 and the bending part 61 of the busbar 6. Specifically, red or green light is used to supplement the illumination in the through-hole 51 area of ​​the adhesive film 5, so as to facilitate the identification by the fixed camera 2.

[0051] Furthermore, in step S4, the adhesive film 5 is moved to a position close to the surface of the battery cell assembly by the gripper mechanism, and then the adhesive film 5 is scraped flat onto the battery cell assembly by the scraper mechanism, so as to prevent bubbles and wrinkles from appearing when the adhesive film 5 is covered on the battery cell assembly.

[0052] The process includes the following steps: when the scraper mechanism smooths the adhesive film 5 onto the battery cell assembly, the surface of the adhesive film 5 is illuminated with striped light by a movable light source 321; the area of ​​the adhesive film 5 illuminated with striped light is detected by a movable camera 311 to determine if it is distorted; and the distorted area of ​​the adhesive film 5 is adjusted by a gripper mechanism to make the adhesive film 5 smooth. Thus, through the cooperation of the movable light source 321, the movable camera 311, and the gripper mechanism, wrinkles can be prevented from forming on the adhesive film 5 when it is smoothed onto the battery cell assembly. If the stripe light on the film 5 is smooth, no adjustment is needed. If the stripe light on the film 5 is distorted, the distortion area of ​​the film 5 is adjusted by the gripper mechanism. Specifically, the area of ​​the film 5 is divided according to the positions of the upper left, lower left, upper right, and lower right. If the distortion side appears in the lower left corner of the film 5, the lower left corner of the film 5 is adjusted separately by the gripper mechanism. For example, the gripper in the lower left corner moves downward until the stripe light at this position is no longer curved. After the stripe light has swept the entire film 5, the film 5 is then smoothed on the surface of the battery cell assembly. If the distortion side spans both the upper and lower sides, the side of the film 5 with a larger distortion amplitude is adjusted by the gripper mechanism.

[0053] Furthermore, in step S5, after the bent portion 61 is stretched, it is tilted towards the side closest to the inner wall of the through hole 51. This facilitates pressing the bent portion 61 onto the adhesive film 5 and prevents the bent portion 61 from folding and breaking when pressed. Step S5 also includes pressing the area of ​​the busbar 6 near the inner wall of the through hole 51 using a pressing mechanism, and then clamping and stretching the bent portion 61 using a gripper mechanism. Through the cooperation of the pressing mechanism and the gripper mechanism, the bent portion 61 is stretched and straightened, preventing excessive stretching that could damage the solder strip connection structure or the adhesive film 5 on the photovoltaic module. It also prevents the busbar 6 from being too long and affecting the installation of downstream processes.

[0054] Furthermore, after step S5, the following step is also included:

[0055] S6. Press the bent part 61 so that the bent part 61 is pressed onto the adhesive film 5;

[0056] S7. Apply a film to the through hole 51 of the adhesive film 5 so that the film can block the through hole 51 of the adhesive film 5.

[0057] Steps S6 and S7 prevent adhesive overflow at the through-hole 51 of the adhesive film 5 during the lamination process. Step S6 includes guiding and correcting the position of the bent portion 61 relative to the through-hole 51 using a guiding mechanism, and then pressing the bent portion 61 onto the adhesive film 5 using a pressing mechanism. Through the cooperation of the guiding mechanism and the pressing mechanism, the guiding mechanism can guide and restrict the pressing position of the bent portion 61 on the adhesive film 5 when the pressing mechanism presses it, thereby preventing the bent portion 61 from being misaligned within the through-hole 51 of the adhesive film 5 after bending, and avoiding uneven adhesive overflow in subsequent lamination processes. In addition, when installing the junction box, it is necessary to first lift the exposed end of the bent portion 61 to facilitate the removal of the adhesive film. If the bent portion 61 is tilted during pressing, it is easy to cause inaccurate positioning of the bent portion 61, thus failing to effectively remove the adhesive film and shape the busbar in subsequent processes. Furthermore, after step S6, the position of the bent portion 61 relative to the through hole 51 can be clamped and corrected by the correction mechanism, thereby improving the positional accuracy of the bent portion 61 on the adhesive film 5 and further avoiding uneven adhesive overflow in subsequent lamination processes. The implementation methods of the gripper mechanism, scraper mechanism, pressing mechanism, clamping mechanism, guiding mechanism, pressing mechanism, and correction mechanism are not unique, and this embodiment does not impose specific limitations.

[0058] Example 2

[0059] This embodiment also provides a correction device, which is used in the photovoltaic module correction method as described in Embodiment 1. Figure 2 and Figure 3As shown, the correction device includes a frame 1 and a fixed camera 2, a first horizontal drive assembly 3, and a second horizontal drive assembly 4 mounted on the frame 1. The driving end of the second horizontal drive assembly 4 is equipped with a suction cup 41. The second horizontal drive assembly 4 can drive the suction cup 41 to move horizontally, and the suction cup 41 is used to adsorb the adhesive film 5 on the battery cell assembly. Thus, under the drive of the second horizontal drive assembly 4, the suction cup 41 can move the adhesive film 5 horizontally, thereby adjusting the position of the adhesive film 5 relative to the battery cell assembly. (The suction cup 41 is only one way to drive the adhesive film 5 to move; preferably, a corresponding clamping plate or other mechanism can also be used to achieve the same result. Compared to using only the suction cup 41, this method is more efficient.) To effectively prevent the adhesive film 5 from falling off during adsorption and handling, a fixed camera 2 is used to photograph the through-hole 51 of the adhesive film 5 and the busbar 6 of the battery cell assembly, so as to visually locate the positions of the through-hole 51 and the busbar 6, facilitating the adjustment of their positions. When adjusting the adhesive film 5, the bent portion 61 needs to be centered within the through-hole 51 of the adhesive film 5. After adjustment, the end of the busbar 6 is pressed to facilitate the subsequent elongation of the bent portion 61 of the busbar 6 and the subsequent straightening of the bent portion 61 of the busbar 6 and the removal of the adhesive film. Optionally, the second horizontal drive assembly 4 is an XY cylinder module, with two cylinders in the X and Y directions respectively used to drive the suction cup 41 to move accordingly.

[0060] Meanwhile, the first horizontal drive assembly 3 is rotatably equipped with a first movable belt 31 and a second movable belt 32 at its drive end. The first horizontal drive assembly 3 can drive the first movable belt 31 and the second movable belt 32 to move horizontally. A movable camera 311 is mounted on the first movable belt 31, and a movable light source 321 is mounted on the second movable belt 32. Thus, both the movable camera 311 and the movable light source 321 can move horizontally. Their movement should be synchronous, and the action mechanisms are interconnected to prevent the light spot from moving too fast or too slow and falling out of the field of view of the movable camera 311. The rotation angles of the movable camera 311 and the movable light source 321 are adjustable, allowing the movable camera 311 to assist in photographing the film 5 and the battery cell assembly, and the movable light source 321 to provide illumination. By creating a clear color difference on the translucent film, the difficulty of visual inspection is reduced. Optionally, the first horizontal drive assembly 3 is a lead screw and slide rail module.

[0061] 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 can make other variations or modifications based on the above description. 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 correcting photovoltaic modules, characterized in that, Includes the following steps: S1. Grab and move the adhesive film (5) on the battery cell assembly so that the adhesive film (5) is separated from the battery cell assembly; S2. Visually inspect the adhesive film (5) and the battery cell assembly to locate the through holes (51) on the adhesive film (5) and the busbars (6) on the battery cell assembly; S3. Move the adhesive film (5) to adjust the position of the bent portion (61) of the busbar (6) within the through hole (51); S4. Move the adhesive film (5) to attach the adhesive film (5) to the surface of the battery cell assembly; S5. Pull the bent portion (61) toward one side of the inner wall of the through hole (51) to lengthen the bent portion (61); In step S1, after the adhesive film (5) is grasped and moved, the height of the through hole (51) of the adhesive film (5) is lower than or equal to the height of the top of the bent portion (61); In step S5, after the bent portion (61) is stretched, the bent portion (61) is inclined toward the side close to the inner wall of the through hole (51); Step S5 further includes: pressing the area of ​​the busbar (6) near the inner wall of the through hole (51) by a pressing mechanism, and then clamping and stretching the bent part (61) by a gripper mechanism.

2. The photovoltaic module correction method according to claim 1, characterized in that, Step S2 further includes: during visual inspection of the adhesive film (5) and the battery cell assembly, shining light on the through-hole (51) area of ​​the adhesive film (5).

3. The photovoltaic module correction method according to claim 1, characterized in that, Step S4 further includes: moving the adhesive film (5) to a position close to the surface of the battery cell assembly by means of a gripper mechanism, and then scraping the adhesive film (5) onto the battery cell assembly by means of a scraper mechanism.

4. The photovoltaic module correction method according to claim 3, characterized in that, When the scraper mechanism scrapes the adhesive film (5) onto the battery cell assembly, it further includes: A strip of light is projected onto the surface of the adhesive film (5) using a movable light source (321); The movable camera (311) detects whether the area of ​​the film (5) illuminated by the strip light is distorted; The twisted area of ​​the adhesive film (5) is adjusted by the gripper mechanism to make the adhesive film (5) smooth.

5. The photovoltaic module correction method according to claim 1, characterized in that, Following step S5, the following step is also included: S6. Press the bent portion (61) so that the bent portion (61) is pressed onto the adhesive film (5); S7. Apply a film to the through hole (51) of the adhesive film (5) so that the film can block the through hole (51) of the adhesive film (5).

6. The photovoltaic module correction method according to claim 5, characterized in that, Step S6 further includes: guiding and correcting the position of the bent portion (61) relative to the through hole (51) by a guiding mechanism, and then pressing the bent portion (61) onto the adhesive film (5) by a pressing mechanism.

7. A corrective device, characterized in that, The correction device is used in the photovoltaic module correction method according to any one of claims 1 to 6, the correction device comprising a frame (1) and a component disposed on the frame (1): A fixed camera (2) is used to photograph the through hole (51) of the adhesive film (5) and the busbar (6) of the battery cell assembly; A first horizontal drive assembly (3) is provided with a first movable belt (31) and a second movable belt (32) at its drive end. The first horizontal drive assembly (3) can drive the first movable belt (31) and the second movable belt (32) to move in the horizontal direction respectively. A movable camera (311) is provided on the first movable belt (31), and a movable light source (321) is provided on the second movable belt (32). The second horizontal driving component (4) has a suction cup (41) at its driving end. The second horizontal driving component (4) can drive the suction cup (41) to move along the horizontal direction. The suction cup (41) is used to adsorb the adhesive film (5) on the battery cell assembly.

Images