Membrane strip preparation device

Abstract

The utility model provides a kind of film strip preparation device, comprising: adhesive film feeding device, including adhesive film roll and can cut adhesive film into multiple continuous film strips along its length direction, and continuous film strip and each welding strip of battery piece form one-to-one corresponding covering fixation;Film strip cutting device, including pull belt assembly, adhesive film receiving platform and adhesive film transverse cutting assembly, pull belt assembly is used to pull out multiple continuous film strips from adhesive film receiving platform to the end far from adhesive film feeding device by the end close to adhesive film feeding device, and the continuous film strip pulled out is positioned on the top surface of adhesive film receiving platform, and adhesive film transverse cutting assembly is used to cut each of multiple continuous film strips into film strip of preset segment number;Film strip longitudinal spacing device is used to increase the spacing between adjacent two film strips in the length direction of film strip in each film strip formed.The utility model greatly improves the utilization rate of adhesive film, eliminates improper waste of adhesive film, and reduces the production cost of battery piece.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic cell string preparation technology, specifically to a film strip preparation device. Background Technology

[0002] A photovoltaic module's photovoltaic panel is made up of multiple cell strings connected together by busbars, and a cell string is made up of multiple cells connected together by solder strips. When laying solder strips on the cells, the solder strips need to be connected to the grid lines of the cells.

[0003] Common methods for connecting solder strips to solar cells include welding, adhesive bonding, and encapsulation film bonding. Because welding is costly and adhesive bonding suffers from poor conductivity, encapsulation film bonding is widely favored in the industry.

[0004] In the BC battery stringing scheme, one side of the battery cell needs to be coated to position the solder ribbon on the battery cell so that the grid lines on the battery cell are connected to the solder ribbon, thereby allowing the current on the battery cell to be discharged.

[0005] In existing BC battery stringing solutions, in order to improve the stringing efficiency, the required battery cells for the battery string are arranged at once, and then all battery cells are simultaneously welded with a film coating. In this stringing method, the film covering the battery cell is a whole piece of film, which results in film waste during the production process, low film utilization, and high production costs. Utility Model Content

[0006] The membrane strip preparation device designed in this utility model can overcome the shortcomings of the existing technology, which uses a whole piece of membrane for the adhesive film used to connect and position the battery cells, resulting in low adhesive film utilization and high production cost.

[0007] The purpose of this utility model is to provide a membrane strip preparation device, comprising:

[0008] The adhesive film feeding device includes an adhesive film roll and is capable of cutting the adhesive film along its length into multiple continuous film strips that are continuous along its length, wherein the continuous film strips correspond one-to-one with each solder strip of the battery cell and are covered and fixed.

[0009] A film strip cutting device includes a belt pulling assembly, a film receiving platform, and a film transverse cutting assembly. The belt pulling assembly is used to pull multiple continuous film strips from one end of the film receiving platform near the film feeding device to the other end away from the film feeding device. The pulled-out continuous film strips are received and positioned on the top surface of the film receiving platform. The film transverse cutting assembly is used to cut each of the multiple continuous film strips into a predetermined number of film strips.

[0010] A longitudinal spacing device for membrane strips is used to increase the spacing between two adjacent membrane strips in the longitudinal direction of the membrane strips.

[0011] In some embodiments, the film receiving platform includes a plurality of sub-receiving platforms arranged sequentially along the length of the film strip, with a cutting groove formed between two adjacent sub-receiving platforms; the film transverse cutting assembly includes a plurality of transverse cutting blade assemblies spaced apart along the length of the film strip, each transverse cutting blade assembly having a cutting blade that corresponds one-to-one with the position of each cutting groove and can be driven to rise and fall; and / or, the pull strap assembly includes a pull strap handle, which is slidably connected to the left and right sides of the film receiving platform.

[0012] In some embodiments, each of the transverse cutting blade assemblies further includes a blade holder on which a plurality of cutting blades are simultaneously disposed; and / or, each cutting blade includes a plurality of blades spaced apart along the width direction of the film strip.

[0013] In some embodiments, each of the blade holders is fixed to a lifting plate; and / or, the distance between two cutting blades on the same blade holder at the two sides of the membrane strip along its length is equal to the length of a battery cell.

[0014] In some embodiments, the top surface of each of the sub-receiving stages has a plurality of vacuum adsorption grooves for adsorbing and positioning each of the membrane strips.

[0015] In some embodiments, the longitudinal separation device for the membrane strip includes a separation frame, a plurality of separation adsorption plates and a distance adjustment component. Each of the separation adsorption plates is slidably connected to the separation frame along the length direction of the membrane strip, and the distance adjustment component is used to drive each of the separation adsorption plates to move along the length direction of the membrane strip.

[0016] In some embodiments, the distance adjustment component includes a rotary motor fixedly connected to each of the spaced adsorption plates and a rack fixedly connected to the spaced frame. The length direction of the rack is parallel to the length direction of the membrane strip, and the gears sleeved on the output shaft of each rotary motor mesh with the rack.

[0017] In some embodiments, the film strip preparation apparatus further includes a lifting drive component for adjusting the height of the spacing frame.

[0018] In some embodiments, the belt pull assembly further includes a lateral drive assembly for driving the belt puller to move linearly back and forth between the two ends of the film feeding device.

[0019] In some embodiments, the lateral drive assembly includes a fixed frame and a first tensioning wheel and a second tensioning wheel rotatably connected to both ends of the length of the fixed frame. The conveyor belt is tensioned between the first tensioning wheel and the second tensioning wheel. The belt puller is fixedly connected to the conveyor belt. The first tensioning wheel is driven by a conveyor motor.

[0020] The membrane strip preparation device of this utility model can longitudinally and laterally cut a whole sheet of adhesive film to form a membrane strip with a preset spacing and preset length that corresponds one-to-one with the length of the battery cell and the width of each solder strip on the battery cell. Compared with the existing technology of covering a whole sheet of adhesive film on one side (e.g., the front or the back) of a battery cell, this device greatly improves the utilization rate of the adhesive film, eliminates improper waste of the adhesive film, and reduces the production cost of the battery cell. Attached Figure Description

[0021] Figure 1 This is a front view of the membrane strip preparation device in an embodiment of this utility model;

[0022] Figure 2 yes Figure 1 A three-dimensional structural diagram with some components (such as the film feeding device) omitted.

[0023] Figure 3 yes Figure 2 A three-dimensional structural diagram of the longitudinal membrane strip splitting device, excluding the top plate of the splitting frame;

[0024] Figure 4 yes Figure 2 A three-dimensional structural diagram of the tool holder in the diagram;

[0025] Figure 5 yes Figure 1 A three-dimensional structural diagram of two adjacent sub-supporting platforms.

[0026] In the diagram: 1. Film feeding device; 11. Film roll; 12. Conveyor roller; 13. Drive roller; 14. Longitudinal cutting roller; 15. Transverse splitting roller; 16. Feeding stand; 2. Film strip cutting device; 21. Film receiving platform; 211. Sub-receiving platform; 212. Cutting channel; 213. Vacuum adsorption tank; 221. Transverse cutting knife assembly; 2211. Cutting knife mounting part; 2212. Knife holder; 23. Lifting plate; 241. Fixed frame; 242. First tensioning roller; 243. Second tensioning roller; 244. Conveyor rotary belt; 245. Conveyor rotary motor; 25. Belt puller; 3. Longitudinal splitting device for film strips; 31. Splitting frame; 311. Slide rail; 32. Splitting adsorption plate; 331. Rotary motor; 3311. Gear; 332. Rack. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. In the drawings, for clarity, the thickness of regions and layers is exaggerated. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0028] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0029] The following example describes a membrane strip preparation apparatus of this utility model. This example is only a part of the embodiments of this utility model, but the protection scope of this utility model is not limited thereto. All other embodiments obtained by those skilled in the art without inventive effort should be covered within the protection scope of this utility model.

[0030] Please refer to the reference. Figures 1 to 5 According to the embodiments of this utility model, see details below. Figure 1 As shown, a membrane strip preparation apparatus is provided, comprising:

[0031] The adhesive film feeding device 1 includes an adhesive film roll 11 and is capable of cutting the adhesive film along its length direction into multiple continuous film strips that are continuous along the length direction of the adhesive film. The continuous film strips are covered and fixed in a one-to-one correspondence with each of the welding strips (not shown in the figure) of the battery cell (not shown in the figure). Each continuous film strip is spaced apart from each other by a certain distance in the width direction of the film strip (the spacing distance is approximately matched with the distance between two adjacent welding strips).

[0032] The film strip cutting device 2 includes a belt pulling assembly (not labeled in the figure), a film receiving platform 21, and a film transverse cutting assembly (not labeled in the figure). The belt pulling assembly is used to move multiple continuous film strips from the film receiving platform 21 to one end of the film feeding device 1 (e.g., ...). Figure 1 Pull out the left end (as shown) to the end away from the film feeding device 1 (e.g., the left end of the direction shown) Figure 1(At the right end of the indicated position), the pulled-out continuous film strip is received and positioned on the top surface (also called the receiving surface) of the film receiving platform 21. The film transverse cutting component is used to cut each of the multiple continuous film strips into a preset number of film strips. The specific number of strips can be reasonably selected according to actual production needs.

[0033] The membrane strip longitudinal spacing device 3 is used to increase the spacing between two adjacent membrane strips in the longitudinal direction of the membrane strip, that is, to adjust the two adjacent membrane strip segments in the longitudinal direction of the membrane strip to be further apart from each other.

[0034] The film strip preparation device in this technical solution can longitudinally and laterally cut the entire film to form film strips with preset spacing and preset length that correspond one-to-one with the length of the battery cell and the width of each solder strip on the battery cell. Compared with the existing technology of covering the entire film sheet on one side (e.g., the front or the back) of a battery cell, this method greatly improves the utilization rate of the film, eliminates improper waste of the film, and reduces the production cost of the battery cell.

[0035] The film feeding device 1 can be any existing device; see details below. Figure 1 As shown, it includes a feeding plate 16. On the vertical surface of the feeding plate 16, the aforementioned film roll 11, multiple conveying rollers 12, drive rollers 13, longitudinal cutting rollers 14, and transverse spacing rollers 15 are arranged. The drive rollers 13 can pull the film out from the film roll 11. Each conveying roller 12 is spaced apart on the film conveying path to ensure smooth film conveying. The aforementioned longitudinal cutting rollers 14 are used to cut the film into multiple continuous film strips, while the transverse spacing rollers 15 can increase the transverse spacing of the multiple continuous film strips formed by the aforementioned longitudinal cutting rollers 14 to prevent adjacent continuous film strips from sticking together.

[0036] In some implementation methods, see details. Figure 5 As shown, the film receiving platform 21 includes a plurality of sub-receiving platforms 211 arranged sequentially along the length of the film strip. A cutting groove 212 is formed between two adjacent sub-receiving platforms 211. The film transverse cutting assembly includes a plurality of transverse cutting blade assemblies 221 arranged at intervals along the length of the film strip. Each transverse cutting blade assembly 221 has a cutting blade that corresponds one-to-one with the position of each cutting groove 212 and can be driven to rise and fall. It is understood that the cutting blade can extend from the cutting groove 212 to the top surface of the film receiving platform 21 to form cutting segments for each continuous film strip.

[0037] In this technical solution, the adhesive film receiving platform 21 is formed by splicing together multiple sub-receiving platforms 211 and forming a cutting through groove 212 between them, which can simplify the structure and reduce the flatness accuracy requirements of large-size platforms.

[0038] In a preferred embodiment, the pull belt assembly includes a pull belt handle 25, which is slidably connected to the left and right sides of the film receiving platform 21. This ensures the stability of the pull belt handle 25 during the pull belt process and prevents the position of each continuous film strip from shifting. The aforementioned pull belt handle 25 can be a conventional pull belt handle used in the industry. In principle, a pull belt handle 25 capable of clamping and releasing the free ends of multiple film strips is sufficient. This invention does not make any special modifications to the specific structure of the pull belt handle 25.

[0039] In some embodiments, each of the transverse cutting blade assemblies 221 further includes a blade holder 2212, on which multiple cutting blades (not shown in the figures) are simultaneously disposed, such as... Figure 4 As shown, multiple cutting blade mounting parts 2211 are provided on the top surface of the blade holder 2212. Each cutting blade can be detachably mounted at this position. For a cutting through slot 212, a single integral blade can be used, but such integral blades are more expensive. In a preferred embodiment, each cutting blade includes multiple blades spaced apart along the width direction of the film strip. It is understood that the number of blades is equal to the number of continuous film strips and forms a one-to-one correspondence in position. Although this makes the blade assembly process more complicated, the production and maintenance costs are lower.

[0040] See further Figure 2 As shown, in some embodiments, each of the tool holders 2212 is fixed on the lifting plate 23. Multiple tool holders 2212 are assembled on the same lifting plate 23 at the same time. In this case, only one lifting drive component (such as a lifting cylinder) is required to drive the lifting plate 23 to rise and fall, which simplifies the structural design and reduces the product manufacturing cost.

[0041] See Figure 4 As shown, in some embodiments, the distance between two cutting blades on the two sides of the film strip along the length direction on the same blade holder 2212 is equal to the length of a battery cell. Thus, it can be understood that the length of the film strip cut by the same blade holder 2212 is exactly matched with the length of a battery cell, which can meet the actual requirements of the welding strip coverage length.

[0042] In some embodiments, the top surface of each of the sub-receiving platforms 211 has a plurality of vacuum adsorption grooves 213 for adsorbing and positioning each of the membrane strips, so as to reliably position each membrane strip thereon and ensure smooth lateral cutting of the continuous membrane strip.

[0043] In some embodiments, the longitudinal separation device 3 of the membrane strip includes a separation frame 31, a plurality of separation adsorption plates 32 and a distance adjustment component (not labeled in the figure). Each of the separation adsorption plates 32 is slidably connected to the separation frame 31 along the length direction of the membrane strip. Specifically, the separation frame 31 includes a top frame (not labeled in the figure) and slide rails 311 on both sides of the width of the top frame. The width sides of the separation adsorption plates 32 are slidably connected to the aforementioned slide rails 311. The distance adjustment component is used to drive each of the separation adsorption plates 32 to move along the length direction of the membrane strip.

[0044] In this technical solution, by adjusting and increasing the longitudinal spacing between two adjacent split adsorption plates 32, the position of each membrane strip can be better matched with the position of each battery cell in the battery string.

[0045] See details Figure 3 As shown, in some embodiments, the distance adjustment component includes a rotary motor 331 fixedly connected to each of the spacing adsorption plates 32 in a one-to-one correspondence, and a rack 332 fixedly connected to the spacing frame 31. The length direction of the rack 332 is parallel to the length direction of the membrane strip, and the gear 3311 sleeved on the output shaft of each rotary motor 331 meshes with the rack 332.

[0046] In this technical solution, the gears 3311 of each rotary motor 331 mesh with the racks 332 that are fixed in position. When the rotary motor 331 is running, it will drive each rotary motor 331 in the opposite direction to drive each spacing adsorption plate 32 that is fixedly connected to it, thereby realizing the precise and flexible adjustment of the longitudinal spacing of the film strip.

[0047] In some embodiments, the film strip preparation apparatus further includes a lifting drive component (not shown in the figure), which is used to adjust the height of the spacing frame 31. Specifically, the lifting drive component can be a lifting cylinder or other component capable of lifting. In practical applications, when the transverse cutting blade assembly 221 is used to transversely cut each continuous film strip into segments, the lifting drive component is controlled to lower the spacing frame 31, thereby ensuring that each spacing adsorption plate 32 is pressed onto the top surface of each sub-receiving platform 211, ensuring smooth cutting.

[0048] In some embodiments, the pull belt assembly further includes a lateral drive assembly (not shown in the figure), which drives the pull belt handle 25 to move linearly back and forth between the two ends of the film feeding device 1. See details. Figure 2As shown, the transverse drive assembly includes a fixed frame 241 and a first tensioning wheel 242 and a second tensioning wheel 243 rotatably connected to both ends of the fixed frame 241. The conveyor belt 244 is tensioned between the first tensioning wheel 242 and the second tensioning wheel 243. The belt puller 25 is fixedly connected to the conveyor belt 244. The first tensioning wheel 242 is driven by a conveyor motor 245. The belt puller 25 is driven by the conveyor belt 244, making the structure more reasonable.

[0049] It should be noted that the horizontal direction mentioned above is the direction perpendicular to the length of each adhesive film, and the vertical direction is the direction parallel to the length of each adhesive film.

[0050] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0051] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A membrane strip preparation apparatus, characterized in that, include: The adhesive film feeding device (1) includes an adhesive film roll (11) and is capable of cutting the adhesive film along its length direction into multiple continuous film strips that are continuous along its length direction. The continuous film strips are correspondingly covered and fixed to each of the welding strips of the battery cell. The film strip cutting device (2) includes a belt pulling assembly, a film receiving platform (21), and a film transverse cutting assembly. The belt pulling assembly is used to pull multiple continuous film strips from one end of the film receiving platform (21) near the film feeding device (1) to the end away from the film feeding device (1). The pulled-out continuous film strips are received and positioned on the top surface of the film receiving platform (21). The film transverse cutting assembly is used to cut each of the multiple continuous film strips into a preset number of film strips. The membrane strip longitudinal spacing device (3) is used to increase the spacing between two adjacent membrane strips in the longitudinal direction of the membrane strip.

2. The membrane strip preparation apparatus according to claim 1, characterized in that, The film receiving platform (21) includes a plurality of sub-receiving platforms (211) arranged sequentially along the length of the film strip, and a cutting groove (212) is formed between two adjacent sub-receiving platforms (211). The film transverse cutting assembly includes a plurality of transverse cutting blade assemblies (221) arranged at intervals along the length of the film strip. Each transverse cutting blade assembly (221) has a cutting blade that corresponds one-to-one with the position of each cutting groove (212) and can be driven to rise and fall. And / or, the pull strap assembly includes a pull strap handle (25), which is slidably connected to the left and right sides of the film receiving platform (21).

3. The membrane strip preparation apparatus according to claim 2, characterized in that, Each of the transverse cutting blade assemblies (221) further includes a blade holder (2212), on which a plurality of the cutting blades are simultaneously disposed; and / or, each of the cutting blades includes a plurality of blades spaced apart along the width direction of the film strip.

4. The membrane strip preparation apparatus according to claim 3, characterized in that, Each of the blade holders (2212) is fixed on the lifting plate (23); and / or, the distance between two cutting blades on the same blade holder (2212) at the two sides of the membrane strip along the length direction is equal to the length of a battery cell.

5. The membrane strip preparation apparatus according to claim 2, characterized in that, Each of the sub-receiving platforms (211) has a plurality of vacuum adsorption grooves (213) on its top surface for adsorbing and positioning each of the membrane strips.

6. The membrane strip preparation apparatus according to claim 2, characterized in that, The longitudinal separation device (3) of the membrane strip includes a separation frame (31), a plurality of separation adsorption plates (32) and a distance adjustment component. Each of the separation adsorption plates (32) is slidably connected to the separation frame (31) along the length direction of the membrane strip. The distance adjustment component is used to drive each of the separation adsorption plates (32) to move along the length direction of the membrane strip.

7. The membrane strip preparation apparatus according to claim 6, characterized in that, The distance adjustment component includes a rotary motor (331) fixedly connected to each of the spacing adsorption plates (32) and a rack (332) fixedly connected to the spacing frame (31). The length direction of the rack (332) is parallel to the length direction of the membrane strip. The gear (3311) sleeved on the output shaft of each rotary motor (331) meshes with the rack (332) at the same time.

8. The membrane strip preparation apparatus according to claim 6, characterized in that, It also includes a lifting drive component for adjusting the height of the pitch frame (31).

9. The membrane strip preparation apparatus according to claim 6, characterized in that, The belt pull assembly also includes a lateral drive assembly, which drives the belt puller (25) to move linearly back and forth between the two ends of the length of the adhesive film feeding device (1).

10. The membrane strip preparation apparatus according to claim 9, characterized in that, The lateral drive assembly includes a fixed frame (241) and a first tensioning wheel (242) and a second tensioning wheel (243) rotatably connected to both ends of the fixed frame (241). The conveyor belt (244) is tensioned between the first tensioning wheel (242) and the second tensioning wheel (243). The belt puller (25) is fixedly connected to the conveyor belt (244). The first tensioning wheel (242) is driven by a conveyor motor (245).

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