Film and battery cell composite strength enhancement device and pressing equipment

Abstract

The utility model discloses a composite strength enhancement device for adhesive film and battery cell and a pressing device. The composite strength enhancement device for adhesive film and battery cell comprises a supporting component and a pressing component, wherein the pressing component comprises a cylindrical pressing roller, wherein the pressing roller is rotatably connected to the supporting component, and a material passing gap for battery string to pass through is provided between the outer peripheral surface of the pressing roller and the conveying surface of the conveying component. The composite strength enhancement device for adhesive film and battery cell of the utility model can increase the process window of process parameters such as lamp power and bottom plate temperature during the composite process, so that the pressing net and the adhesive film will not be adhered to the pressing net due to excessive temperature, and at the same time, the composite strength between the adhesive film and the battery cell can be increased, the battery string fragmentation phenomenon can be reduced or avoided, the string return phenomenon can be reduced or avoided, and the product yield can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a device for enhancing the composite strength of an adhesive film and a battery sheet and a pressing device. Background Art

[0002] In the photovoltaic field, the main grid-free lamination process mainly forms a battery string by compounding the welding strip, battery cell and adhesive film. The composite strength between the adhesive film and the battery cell determines the quality of the battery string. At present, the composite strength between the adhesive film and the battery cell is controlled by increasing the base plate temperature and the light tube power during compounding. However, in this method, process parameters such as base plate temperature and light tube power are not easy to control; in addition, since the adhesive film is easy to melt after being heated, it is easy to adhere to the pressing net when the temperature is too high, resulting in the battery string being fragile and the string return rate being high, which further affects the product yield and also increases the production cost. Utility Model Content

[0003] Based on this, it is necessary to provide a device for enhancing the composite strength of adhesive film and battery cell. The device for enhancing the composite strength of adhesive film and battery cell of the utility model can achieve at least one of the following effects: on the one hand, it can increase the process window of process parameters such as lamp power and bottom plate temperature in the pressing process, and solve the problem of the pressure net and adhesive film being stuck to the pressure net due to excessive temperature in the traditional technology; on the other hand, it can increase the composite strength between the adhesive film and the battery cell, reduce or avoid the phenomenon of battery cell fragmentation and reduce or avoid the phenomenon of cross-return, increase product yield, and reduce production costs.

[0004] An embodiment of the present application provides a device for enhancing the composite strength of an adhesive film and a battery cell.

[0005] A device for enhancing the composite strength of an adhesive film and a battery cell comprises a supporting component and a pressing component, wherein the pressing component comprises a cylindrical pressing roller, and the pressing roller is rotatably connected to the supporting component. When in use, the supporting component is used to be installed on a conveying component, and a material passing gap is provided between the outer peripheral surface of the pressing roller and the conveying surface of the conveying component for allowing a battery string to pass through.

[0006] In some embodiments, the support component includes at least two first support plates, wherein the two first support plates are arranged opposite to each other, and the pressing rolling element is rotatably connected to the first support plates arranged opposite to each other.

[0007] In some embodiments, two ends of the rotating shaft of the pressing rolling element are rotatably connected to the first supporting plates which are arranged opposite to each other.

[0008] In some embodiments, the support component further includes a second support plate connected to the first support plate which is arranged opposite to the first support plate, and the first support plate and the second support plate are in a gantry structure as a whole.

[0009] In some of the embodiments, the pressing roller is movably connected to the supporting component to achieve an adjustable spacing of the material transfer gap between the outer peripheral surface of the pressing roller and the conveying surface of the conveying component.

[0010] In some embodiments, the device for enhancing the composite strength of the adhesive film and the battery cell further includes an adjusting component, wherein the adjusting component is mounted on the supporting component, and the adjusting component is connected to the pressing roller for adjusting the position of the pressing roller on the supporting component, thereby adjusting the spacing of the material transfer gap between the outer peripheral surface of the pressing roller and the conveying surface of the conveying component.

[0011] In some embodiments, the adjusting component includes an elastic component, the supporting component has an adjusting hole extending in a vertical direction, the rotating shaft of the pressing roller is arranged in the adjusting hole and can rotate in the adjusting hole and move along the extension direction of the adjusting hole, the elastic component is arranged in the adjusting hole and movably connected to the rotating shaft of the pressing roller to assist the movement and resetting of the pressing roller.

[0012] In some embodiments, the elastic member is a spring.

[0013] In some of the embodiments, the pressing component further includes a high temperature resistant and flexible buffer layer, and the buffer layer is connected to the outer peripheral surface of the pressing rolling element.

[0014] In some embodiments, the thickness of the buffer layer is 5 mm to 100 mm.

[0015] An embodiment of the present application provides a pressing device.

[0016] A laminating device comprises a laminating machine, a conveying component and a device for enhancing the composite strength of the adhesive film and the battery cell; wherein, along the conveying direction, the laminating machine is located at the front end of the conveying component, and the device for enhancing the composite strength of the adhesive film and the battery cell is installed at the rear end of the conveying component.

[0017] The above-mentioned device for enhancing the composite strength of the adhesive film and the battery cell, by adding a pressing roller, presses the battery string again after the pressing process, so that the pressing temperature can be slightly lowered in the previous normal pressing process to avoid the adhesive film from sticking to the pressing net due to excessive temperature. In addition, since there is residual temperature on the surface of the battery string after the pressing process, the battery string after the string passes through the pressing roller of the present application, and can be pressed for the second time, so as to further connect the adhesive film with the battery cell, improve the composite strength of the adhesive film and the battery cell on the battery string, increase the product yield, reduce the string return phenomenon, and reduce the production cost; at the same time, due to the addition of the secondary pressing of the pressing roller, the adjustable range of the process parameters in the previous normal pressing process, such as the bottom plate temperature parameter and the lamp power parameter, becomes larger, for example, the bottom plate temperature is reduced, the lamp power is reduced, and so on. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0019] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0020] Figure 1 This is a schematic diagram of a pressing device according to an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of a device for enhancing the composite strength of an adhesive film and a battery cell according to an embodiment of the utility model.

[0022] Description of Reference Numerals

[0023] 10. Laminating equipment; 100. Device for enhancing composite strength of adhesive film and battery cell; 110. Support component; 111. First support plate; 112. Second support plate; 113. Adjustment hole; 120. Laminating rolling element; 130. Feed gap; 140. Elastic element; 200. Conveying component; 210. Conveying surface; 20. Battery string. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for a broad range of quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0030] The embodiment of the present application provides a device 100 for enhancing the composite strength of adhesive film and battery cell, so as to solve the problem that in the conventional busbar-free (0BB) lamination process, when the solder strip, battery cell and adhesive film are composited, the method of controlling the composite strength between the adhesive film and the battery cell by increasing the base plate temperature and the light tube power has at least one of the following problems: (1) the process parameter window such as base plate temperature and light tube power is small and difficult to control; (2) when the base plate temperature is too high, the adhesive film is easily bonded to the pressing net, resulting in the battery cell being fragile and the cross-return rate being high, which affects the product yield. The device 100 for enhancing the composite strength of adhesive film and battery cell will be described below in conjunction with the accompanying drawings.

[0031] The adhesive film and battery cell composite strength enhancement device 100 provided in the embodiment of the present application is exemplary, please refer to Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of the lamination device 10 provided in an embodiment of the present application. Figure 2 The structure diagram of the adhesive film and battery cell composite strength enhancement device 100 provided in the embodiment of the present application can effectively enhance the composite strength of the solder strip, battery cell and adhesive film in the busbar-free lamination process.

[0032] In order to more clearly illustrate the structure of the device 100 for enhancing the composite strength of the adhesive film and the battery cell, the device 100 for enhancing the composite strength of the adhesive film and the battery cell will be introduced below with reference to the accompanying drawings.

[0033] For example, see Figure 2As shown, a device 100 for enhancing the composite strength of adhesive film and battery sheet includes a supporting component 110 and a pressing component. The pressing component includes a cylindrical pressing roller 120. The pressing roller 120 is rotatably connected to the supporting component 110. There is a feeding gap 130 for the battery string 20 to pass through between the outer circumference of the pressing roller 120 and the conveying surface 210 of the conveying component 200. It should be noted that the feeding gap 130 can ensure the passage of the battery string 20. For example, the feeding gap 130 can realize that the upper and lower surfaces of the battery string 20 are respectively in contact with the conveying surface 210 of the conveying component 200 and the outer circumference of the pressing roller 120, or the feeding gap 130 is slightly smaller than the thickness of the battery string 20, so that the pressing roller 120 can apply a certain pressure to the battery string 20 under the action of its own gravity to ensure the secondary composite of the battery string 20. It is not difficult to understand that the pressing roller 120 can also apply a certain pressure to the battery string 20 through an external power mechanism.

[0034] The above-mentioned device 100 for enhancing the composite strength of the adhesive film and the battery cell, by adding a pressing roller 120, presses the battery string 20 again after the pressing process. Since there is residual temperature on the surface of the battery string 20 after the pressing process, the battery string 20 after the pressing process can be pressed again when passing through the pressing roller 120, so as to realize the re-combination of the adhesive film and the battery cell on the battery string 20 and improve the composite strength of the adhesive film and the battery cell on the battery string 20.

[0035] In some of these examples, see Figure 2 As shown, the support component 110 includes at least two first support plates 111. The two first support plates 111 are disposed opposite to the conveying component 200. The pressing roller 120 is rotatably connected to the first support plates 111 disposed opposite to each other. Figure 2 Two first support plates 111 are shown.

[0036] In some embodiments, two ends of the rotating shaft of the pressing rolling element 120 are rotatably connected to the first supporting plates 111 that are oppositely disposed.

[0037] In some of these examples, see Figure 2 As shown, the support component 110 also includes a second support plate 112 connected to the first support plate 111 disposed oppositely. The first support plate 111 and the second support plate 112 are in a gantry structure as a whole. It should be noted that the gantry structure in the present application refers to a structure that is approximately inverted U-shaped as a whole and is formed by connecting the first support plate 111 and the second support plate 112. Figure 2 As shown, when the first support plate 111 and the second support plate 112 are in a gantry structure as a whole, the pressing roller 120 is arranged in the gantry structure. The support component 110 of the gantry structure in the present application is convenient to be installed on the conveying component 200.

[0038] In some embodiments, the pressing roller 120 is movably connected to the supporting member 110 to achieve an adjustable spacing of the material gap 130 between the outer circumference of the pressing roller 120 and the conveying surface 210 of the conveying member 200. The spacing of the material gap 130 between the outer circumference of the pressing roller 120 and the conveying surface 210 of the conveying member 200 can be adjusted according to the thickness of the battery string 20 actually produced.

[0039] In some embodiments, the device 100 for enhancing the composite strength of the adhesive film and the battery sheet further includes an adjusting component. The adjusting component is mounted on the supporting component 110. The adjusting component is connected to the pressing roller 120 to adjust the position of the pressing roller 120 on the supporting component 110, so as to adjust the distance between the outer peripheral surface of the pressing roller 120 and the conveying surface 210 of the conveying component 200.

[0040] In some embodiments, the adjustment component includes an elastic member 140. The support component 110 has an adjustment hole 113 extending in the vertical direction. The rotation axis of the pressed roller 120 is arranged in the adjustment hole 113 and can rotate in the adjustment hole 113 and move along the extension direction of the adjustment hole 113, and the extension direction is also the vertical direction. The elastic member 140 is arranged in the adjustment hole 113 and is movably connected to the rotation axis of the pressed roller 120 to assist the movement and reset of the pressed roller 120, wherein the movably connected can be a rotatable connection between the rotation axis of the pressed roller 120 and the elastic member 140, or the rotation axis of the pressed roller 120 and the elastic member 140 are in contact and cooperate to ensure that the pressed roller 120 can rotate in the adjustment hole 113 and move along the extension direction of the adjustment hole 113. In the present application, the setting of the elastic member 140 can ensure that when the feeding gap 130 is smaller than the battery string 20, the battery string 20 can smoothly enter the feeding gap 130. When the battery string 20 enters the feeding gap 130, the battery string 20 can lift the pressing roller 120 to a certain extent. The pressing roller 120 will not separate from the surface of the battery string 20 under the restriction of the elastic member 140, and the pressing roller 120 has a certain gravity. Therefore, the pressing roller 120 can press the battery string 20. When the battery string 20 is pressed and leaves the feeding gap 130, the pressing roller 120 is reset under the action of gravity and the restoring force of the elastic member 140.

[0041] It should be noted that when the support component 110 includes a first support plate 111 and a second support plate 112 , the above-mentioned adjustment holes 113 are arranged on two opposite first support plates 111 , that is, the adjustment holes 113 are respectively arranged at the same height position on the two opposite first support plates 111 .

[0042] In some embodiments, the elastic member 140 is a spring, or an elastic rubber block, etc.

[0043] In some embodiments, the pressing component also includes a high temperature resistant and flexible buffer layer, that is, the buffer layer is made of a high temperature resistant and soft material. The buffer layer is connected to the outer peripheral surface of the pressing roller 120. The design of the buffer layer can ensure that the pressing roller 120 applies a certain pressure to the battery string 20 when the above-mentioned material gap 130 is smaller than the thickness of the battery string 20, so as to ensure the secondary recombination of the battery string 20, and has a certain buffering effect on the battery string 20, avoiding hard contact between the outer peripheral surface of the pressing roller 120 and the battery string 20, and reducing or avoiding damage to the battery string 20. The buffer layer is not shown in the drawings.

[0044] In some of the embodiments, the high temperature resistant material for preparing the buffer layer includes but is not limited to nylon, polyester wool, polyester synthetic fiber or polyester acrylic fiber.

[0045] In some embodiments, the thickness of the buffer layer is 5 mm to 100 mm. For example, in one specific example, the thickness of the buffer layer is 5 mm. In another specific example, the thickness of the buffer layer is 100 mm. The thickness of the buffer layer can be set according to actual needs.

[0046] Another embodiment of the present application further provides a pressing device 10.

[0047] A pressing device 10, see Figure 1 As shown, it includes a press machine, a conveying component 200, and a device 100 for enhancing the composite strength of the adhesive film and the battery cell. Among them, along the conveying direction, the press machine is located at the front end of the conveying component 200, which is also the loading end, and the device 100 for enhancing the composite strength of the adhesive film and the battery cell is installed at the rear end of the conveying component 200, which is also the discharging end. In the press equipment 10, there is a material gap 130 for the battery string 20 to pass through between the outer peripheral surface of the press rolling element 120 and the conveying surface 210 of the conveying component 200, and the spacing of the material gap 130 is adjustable. In the drawings, the press machine at the front end is not shown.

[0048] The pressing device 10 of the present application can further improve the composite strength between the solder strip, the battery cell and the adhesive film, improve the quality of the battery string 20, avoid or reduce the string return phenomenon, and reduce production costs.

[0049] In some embodiments, the conveying member 200 comprises a conveyor belt, wherein Figure 1 and Figure 2 As shown, the top surface of the conveyor belt forms the above-mentioned conveying surface 210.

[0050] In summary, the device 100 for enhancing the composite strength of the adhesive film and the battery cell of the present application, by adding a pressing roller 120, presses the battery string 20 again after the pressing process, so that the pressing temperature can be slightly reduced during the previous normal pressing process, and the adhesive film is prevented from adhering to the pressing net due to excessive temperature. Since there is residual temperature on the surface of the battery string 20 after the pressing process, the battery string 20 after the string passes through the pressing roller 120 of the present application, and can be pressed for a second time, so as to further achieve the connection between the adhesive film and the battery cell, improve the composite strength of the adhesive film and the battery cell on the battery string 20, increase the product yield, reduce the string return phenomenon, and reduce the production cost. Furthermore, in the present application, due to the addition of the secondary pressing of the pressing roller 120, the adjustable range of the process parameters in the previous normal pressing process, such as the bottom plate temperature parameter and the lamp power parameter, becomes larger, such as reducing the bottom plate temperature, reducing or increasing the pressing time, reducing or increasing the lamp power, etc., effectively broadening the process parameter window of the pressing process.

[0051] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A device (100) for enhancing the composite strength of an adhesive film and a battery cell, characterized in that: The invention comprises a supporting component (110) and a pressing component, wherein the pressing component comprises a cylindrical pressing roller (120), wherein the pressing roller (120) is rotatably connected to the supporting component (110), and when in use, the supporting component (110) is used to be mounted on a conveying component (200), and a material passing gap (130) for allowing a battery string (20) to pass through is provided between an outer peripheral surface of the pressing roller (120) and a conveying surface (210) of the conveying component (200).

2. The device (100) for enhancing the composite strength of adhesive film and battery cell according to claim 1, characterized in that: The support component (110) comprises at least two first support plates (111), wherein the two first support plates (111) are arranged opposite to each other, and the pressing rolling element (120) is rotatably connected to the oppositely arranged first support plates (111).

3. The device (100) for enhancing the composite strength of adhesive film and battery cell according to claim 2, characterized in that: Both ends of the rotating shaft of the pressing rolling element (120) are rotatably connected to the first supporting plate (111) arranged opposite to each other.

4. The device (100) for enhancing the composite strength of adhesive film and battery cell according to claim 2, characterized in that: The support component (110) further comprises a second support plate (112) connected to the first support plate (111) arranged opposite to the first support plate (111), and the first support plate (111) and the second support plate (112) are in a gantry structure as a whole.

5. The device (100) for enhancing the composite strength of adhesive film and battery cell according to any one of claims 1 to 4, characterized in that: The pressing roller (120) is movably connected to the supporting component (110) so as to achieve an adjustable spacing of the material transfer gap (130) between the outer peripheral surface of the pressing roller (120) and the conveying surface (210) of the conveying component (200).

6. The device (100) for enhancing the composite strength of adhesive film and battery cell according to claim 5, characterized in that: The adhesive film and battery cell composite strength enhancement device (100) further comprises an adjustment component, the adjustment component being mounted on the support component (110), the adjustment component being connected to the pressing roller (120) for adjusting the position of the pressing roller (120) on the support component (110), thereby adjusting the spacing of the material transfer gap (130) between the outer peripheral surface of the pressing roller (120) and the conveying surface (210) of the conveying component (200).

7. The device (100) for enhancing the composite strength of adhesive film and battery cell according to claim 6, characterized in that: The adjusting component comprises an elastic component (140); the supporting component (110) has an adjusting hole (113) extending in a vertical direction; the rotating shaft of the pressing rolling component (120) is arranged in the adjusting hole (113) and is capable of rotating in the adjusting hole (113) and moving along the extending direction of the adjusting hole (113); the elastic component (140) is arranged in the adjusting hole (113) and is movably connected to the rotating shaft of the pressing rolling component (120) to assist the pressing rolling component (120) in moving and resetting.

8. The device (100) for enhancing the composite strength of adhesive film and battery cell according to claim 7, characterized in that: The elastic member (140) is a spring.

9. The device (100) for enhancing the composite strength of adhesive film and battery cell according to any one of claims 1 to 4 and 6 to 8, characterized in that: The pressing component also includes a high temperature resistant and flexible buffer layer, and the buffer layer is connected to the outer peripheral surface of the pressing rolling element (120).

10. A pressing device (10), characterized in that: The invention comprises a laminating machine, a conveying component (200), and the adhesive film and battery cell composite strength enhancing device (100) as claimed in any one of claims 1 to 9; wherein, along the conveying direction, the laminating machine is located at the front end of the conveying component (200), and the adhesive film and battery cell composite strength enhancing device (100) is installed at the rear end of the conveying component (200).

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