Conductive composite adhesive film production equipment

Abstract

The utility model discloses production equipment of a conductive composite adhesive film, which comprises an adhesive film compounding mechanism and a punching mechanism which are connected in series, the adhesive film compounding mechanism comprises an upper compression roller and a lower compression roller which are used for pressing an interconnecting strip, a bus bar and an adhesive film, and the surface of the upper compression roller is provided with an annular groove for positioning the interconnecting strip; the punching mechanism comprises a conveying mechanism, a first cutter set used for cutting off interconnecting strips and a second cutter set used for cutting off bus bars, each of the first cutter set and the second cutter set comprises a cutter head and a first lifting mechanism driving the cutter head to ascend and descend, the first cutter set further comprises a first translation mechanism, and the first translation mechanism is located at the top of the first lifting mechanism. The adhesive film compounding mechanism is used for pressing the interconnection strips, the bus bars and the adhesive film to form a compound adhesive film, the punching mechanism is used for cutting off the interconnection strips and the bus bars, so that the interconnection strips form staggered notches, the interconnection strips and the bus bars orderly gather the current of the battery piece, and the adhesive film compounding mechanism is matched with the punching mechanism, so that the conductive compound adhesive film can be quickly produced in batches.

Description

Technical Field

[0001] The utility model relates to conductive composite adhesive film production equipment, belonging to the field of solar cell processing equipment. Background Art

[0002] A 0BB back-contact solar cell module consists of a cell array made of tempered glass, encapsulant film, a backsheet or back glass, and a frame, along with three junction boxes. The cell array contains numerous interconnecting bars and busbars, all of which are flexible, tin-coated copper strips. Specialized cell string welding equipment is required to weld or bond the interconnecting bars to the cells into strings. A stitch welding machine is then required to weld the interconnecting bars and busbars together, forming a cell array with series-parallel circuits. Finally, encapsulation material and back glass are stacked on top of the cell array, and laminated to form a laminate. The frame and junction box are then installed on the laminate to complete the photovoltaic module.

[0003] Patent application CN 117438488 A discloses a photovoltaic module and a method for manufacturing it. Conductors and solder ribbons are embedded in an adhesive film through hot pressing to reduce damage to the cells during the welding process. This adhesive film helps simplify the processing of battery modules, but there is no existing equipment for processing such films. Patent application CN 108663832 A discloses a bonding device for guiding the movement of planar components and pressing two planar components together using a bonding roller. This device is not suitable for the processing and production of filamentary components or composite structures of planar components. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a production equipment for conductive composite adhesive film suitable for batch production.

[0005] Technical solution: The production equipment of a conductive composite film described in the present invention includes an interconnecting strip unwinding mechanism and a bus bar unwinding mechanism arranged at a certain angle, and a film unwinding mechanism parallel to the interconnecting strip unwinding mechanism, a welding mechanism for welding the interconnecting strips and the bus bar is provided between the interconnecting strip unwinding mechanism and the bus bar unwinding mechanism, and a film composite mechanism for pressing the interconnecting strips, bus bars and films is provided downstream of the interconnecting strip unwinding mechanism.

[0006] Preferably, in order to quickly prepare interconnected strips with discontinuous areas on the surface of the composite film, a punching mechanism is provided downstream of the film mechanism.

[0007] Preferably, the punching mechanism includes a conveying mechanism, a knife group for cutting the interconnecting bars and the bus bars, and the knife group includes a knife head for punching and a first lifting mechanism for moving the knife head.

[0008] Preferably, the interconnecting strip unwinding mechanism, the bus bar unwinding mechanism, and the film unwinding mechanism all include a winding roller and a guide roller, and the guide roller of the interconnecting strip unwinding mechanism and the guide roller of the bus bar unwinding mechanism form a certain angle.

[0009] Preferably, in order to ensure that the conductive mesh formed by film welding falls exactly on the film, the guide roller of the film unwinding mechanism is located below the guide roller of the interconnecting strip unwinding mechanism and is parallel to the guide roller of the interconnecting strip unwinding mechanism.

[0010] Preferably, the adhesive film composite mechanism comprises an upper pressing roller and a lower pressing roller for pressing the interconnection bars, the bus bars and the adhesive film, and an annular groove for positioning the interconnection bars is provided on the surface of the upper pressing roller.

[0011] Preferably, the outer wall of the upper pressing roller is provided with a heating mechanism for hot pressing and connecting the busbars, interconnecting bars and adhesive films. The heating mechanism is a heating layer.

[0012] Preferably, a heating mechanism for thermally bonding bus bars, interconnecting bars and adhesive films is provided upstream of the upper pressing roller.

[0013] Preferably, a blanking mechanism is provided downstream of the punching mechanism.

[0014] Preferably, the welding mechanism includes a plurality of welding pressure heads and a second lifting mechanism for driving the welding pressure heads to move.

[0015] Preferably, cutters for cutting materials are respectively provided downstream of the interconnection bar unwinding mechanism, the bus bar unwinding mechanism and the film unwinding mechanism.

[0016] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. It is suitable for batch production of conductive composite films: the film composite mechanism presses the interconnection bars, bus bars, and films to form composite films, and the punching mechanism cuts the interconnection bars and bus bars to form staggered gaps in the interconnection bars, so that the interconnection bars and bus bars collect the battery cell current in an orderly manner. The film composite mechanism and the punching mechanism cooperate to enable the conductive composite film to be produced in batches and quickly; 2. The production quality of the composite film is guaranteed; 3. The production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a side view of the overall structure of the conductive composite film production equipment;

[0018] Figure 2 It is a top view of the interconnection strip unwinding mechanism structure;

[0019] Figure 3 This is a front view of the busbar unwinding mechanism structure;

[0020] Figure 4 It is a side view of the busbar unwinding mechanism structure;

[0021] Figure 5 It is a schematic diagram of the structure of the film composite mechanism with roller heating;

[0022] Figure 6 This is a schematic diagram of the structure of the film composite mechanism for infrared heating;

[0023] Figure 7 A side view of the heating roller structure of a roller-type heated film laminating mechanism;

[0024] Figure 8 Schematic diagram of the punching mechanism structure for one-step forming;

[0025] Figure 9 It is a schematic diagram of the punching mechanism structure of step-by-step forming;

[0026] Figure 10 Schematic diagram of the conductive composite film structure produced by the conductive composite film production equipment. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0028] Example 1: Figure 1 The conductive composite film production equipment is mainly composed of an interconnection strip unwinding mechanism, a bus bar unwinding mechanism 2, a film unwinding mechanism, a welding mechanism 4, a film composite mechanism 5, a punching mechanism 6 and a blanking mechanism 7.

[0029] like Figure 2 The interconnection strip unwinding mechanism includes several groups of winding rollers 11 for winding the interconnection strips 82 and guide rollers 12 for guiding the forward direction of the interconnection strips 82. The number of interconnection strip groups that can be wound by the winding rollers 11 is calculated according to the number of components, which is the number of battery strings required for the entire component multiplied by the number of battery cell grid lines or the number of battery cell grid line welding point rows; a number of annular grooves are evenly arranged on the outside of the guide rollers 12, and the interconnection strips 82 are located in the annular grooves. The guide rollers 12 disperse and flatten the interconnection strips so that the interconnection strips can correspond to the electrode positions of the battery cells and maintain parallel continuous forward transmission. A cutter 13 is provided downstream of the guide rollers 12 or between the guide rollers 12. When the length of the interconnection strips reaches the requirement, all the interconnection strips are cut off at one time.

[0030] like Figure 3 、 Figure 4Downstream of the interconnecting strip unwinding mechanism is the busbar unwinding mechanism 2. Similarly, the busbar unwinding mechanism 2 includes several groups of winding rollers 21 for winding the busbars, and guide rollers 22 for guiding the forward direction of the busbars. The axial direction of the guide rollers 22 forms a certain angle with the axial direction of the guide rollers 12, preferably perpendicular. As a result, the forward direction of the busbar forms a certain angle with the forward direction of the interconnecting strip 82. A welding mechanism 4 is provided at the intersection of the materials guided by the guide rollers 12 and 22. The welding mechanism 4 consists of several evenly arranged welding pressure heads 41 and a lifting mechanism (not shown). The number of welding pressure heads 41 can be one or the same as the number of winding rollers 11 / interconnecting strips 82. The welding pressure heads 41 are driven downward by the lifting mechanism so that one end of several interconnecting strips is welded to a busbar, and the other end and / or the middle is welded to the remaining busbars to form a conductive network. The welding pressure head 31 can be an electromagnetic hot pressing module or an ultrasonic welding module. A cutter 23 is provided between the guide rollers 22 , and when the discharge length reaches the required length, the cutter 23 cuts the busbar.

[0031] like Figure 1 The film unwinding mechanism is parallel to the interconnecting strip unwinding mechanism, so that the forward direction of the film is parallel to the forward direction of the interconnecting strip. The film unwinding mechanism includes a winding roller 31 for winding the film and a guide roller 32 for guiding the forward direction of the film (the axial direction of the guide roller 32 is parallel to the axial direction of the guide roller 12). The guide roller 32 is located below the guide roller 12, so that the film is located below the interconnecting strip. The conductive mesh cut by the cutter 13 can fall on the top of the film, and the forward speed of the film is the same as the forward speed of the interconnecting strip.

[0032] like Figures 5 to 7 Downstream of the welding mechanism 4 is the film laminating mechanism 5, which includes an upper pressing roller 51 and a lower pressing roller 52. As the film is conveyed forward, the upper and lower pressing rollers 51 and 52 provide pressure to press the interconnecting strips 82 against the film surface. The upper pressing roller 51 is provided with annular grooves 512 on its surface, the same number and arrangement as the guide rollers 12. The cross-section of the annular grooves matches that of the interconnecting strips, and they are used to define the position of the interconnecting strips and prevent them from shifting during the lamination process. A heating layer 511 is provided on the periphery of the upper pressing roller 51, or an infrared heating mechanism 54 is provided upstream of the upper pressing roller 51, so that the conductive mesh and the film are simultaneously pressed and thermally bonded to form a composite film. A cutter 53 is provided downstream of the upper pressing roller 51 to cut the composite film.

[0033] like Figure 8 、 Figure 9Downstream of the cutter 53 of the film composite mechanism 5 is the punching mechanism 6, which includes a conveying mechanism 61 for conveying the composite film and a punching assembly 62. The conveying mechanism 61 can be a conveyor belt, and the punching assembly 62 includes a knife group for cutting the interconnecting bars and bus bars. The knife group for cutting the interconnecting bars and bus bars can be the same group, such as a high-speed punching machine, or can be set separately. Taking the different knife groups for cutting the interconnecting strips and bus bars as an example, the punching assembly 62 includes a knife group 621 and a knife group 622. The knife group 621 is used to cut the interconnecting strips on the composite film so that the interconnecting strips form discontinuous areas. The knife group 621 can be 1 row, 2 rows or more rows. The number of knife heads in each knife group 621 is half the number of interconnecting strip groups. When a row of knife groups is set, the knife group is connected to the lifting mechanism and the translation mechanism. The lifting mechanism drives the knife group to press down so that half of the interconnecting strips form discontinuous areas. Then the knife group 621 rises and resets. The translation mechanism drives the knife group to move one grid line spacing and then presses down so that the remaining half of the interconnecting strips form discontinuous areas. When the knife group 621 rises and falls, the conveyor belt 61 conveys synchronously, and this reciprocating process forms staggered discontinuous areas on the composite film. When multiple sets of knife groups 621 are set, the knife heads of two adjacent rows of knife groups are staggered, and the knife groups are only connected to the lifting mechanism, so that the composite film processing can be completed by punching once; the knife group 622 is used to cut the bus bar at one end of the composite film, so that the two adjacent rows of battery cells are connected in series. There can be only one knife head, which cooperates with the lifting mechanism and the translation mechanism to achieve linear punching, or several knife heads can be set to punch multiple holes at one time.

[0034] like Figure 1 The unloading mechanism 7 includes a plurality of suction cups 71 arranged in a rectangular array to transfer the processed composite film from the conveyor belt 61 and stack them into stacks.

[0035] Example 2: Figure 10 , which is a schematic diagram of the structure of a conductive composite adhesive film 8 produced by a conductive composite adhesive film production device. The adhesive film 81 is the base layer of the conductive structure and is made of materials such as EVA, POE, and PO. On one surface of the film 81, a number of interconnecting strips 82 are pre-laid in the length direction by the interconnecting strip unwinding mechanism, and a bus bar 83 is unwound in the width direction by the bus bar unwinding mechanism 2. The ends of the interconnecting strips 82 and the bus bar 83 are welded by the welding mechanism 4 to form a conductive mesh. The film composite mechanism 5 presses the conductive mesh and the film 81 to form a conductive composite film. Then the knife groups 621 and 622 of the punching mechanism 6 are pressed down to cut off the ends of the interconnecting strips 82 and the bus bars in the even rows and the middle of the bus bars 83, cut off the middle of the interconnecting strips 82 in the odd rows, cut off the middle of the interconnecting strips 82 in the even rows, and cut off the ends of the interconnecting strips 82 and the bus bars in the odd rows, so that alternating discontinuity areas 821 are formed on the interconnecting strips 82 and discontinuity areas 831 are formed on the bus bars 83, thus completing the processing of the conductive composite film.

[0036] After adopting the conductive composite adhesive film, the production of components will no longer need to use the process route of first stringing the battery cells, then stacking them, and then laying the back layer of adhesive film. Instead, it only needs to arrange the battery cells into an array in sequence, and then directly stack the composite adhesive film on the battery cell array in two steps to complete the component stacking process, which greatly simplifies the production process.

Claims

1. A conductive composite film production device, characterized in that: The invention comprises an interconnection strip unwinding mechanism and a bus bar unwinding mechanism (2) arranged at a certain angle, and a film unwinding mechanism parallel to the interconnection strip unwinding mechanism, a welding mechanism (4) for welding the interconnection strip and the bus bar is provided between the interconnection strip unwinding mechanism and the bus bar unwinding mechanism, a film composite mechanism (5) for pressing the interconnection strip, the bus bar and the film is provided downstream of the interconnection strip unwinding mechanism, a punching mechanism (6) is provided downstream of the film composite mechanism, the punching mechanism (6) comprises a conveying mechanism (61), a punching assembly (62) for cutting the interconnection strip and / or the bus bar, the punching assembly comprises a cutter head, and a first lifting mechanism for driving the cutter head to move.

2. The conductive composite film production equipment according to claim 1, characterized in that: The interconnection strip unwinding mechanism, the bus bar unwinding mechanism (2), and the film unwinding mechanism all comprise a winding roller and a guide roller, and the guide roller of the interconnection strip unwinding mechanism and the guide roller of the bus bar unwinding mechanism form a certain angle.

3. The conductive composite film production equipment according to claim 2, characterized in that: The guide roller of the film unwinding mechanism is located below the guide roller of the interconnected strip unwinding mechanism and is parallel to the guide roller of the interconnected strip unwinding mechanism.

4. The conductive composite film production equipment according to claim 1, characterized in that: The adhesive film composite mechanism (5) comprises an upper pressing roller (51) and a lower pressing roller (52) for pressing the interconnection strips, bus bars and adhesive film together, and an annular groove (512) for positioning the interconnection strips is provided on the surface of the upper pressing roller (51).

5. The conductive composite film production equipment according to claim 4, characterized in that: A heating mechanism for heating and bonding bus bars, interconnecting bars, and adhesive films is provided on the outer wall or upstream of the upper pressing roller (51).

6. The conductive composite film production equipment according to claim 1, characterized in that: A blanking mechanism (7) is provided downstream of the punching mechanism (6).

7. The conductive composite film production equipment according to claim 1, characterized in that: The welding mechanism (4) comprises a plurality of welding pressure heads (41) and a second lifting mechanism for driving the welding pressure heads to move.

8. The conductive composite film production equipment according to claim 1, characterized in that: The interconnection bar unwinding mechanism, the bus bar unwinding mechanism (2), and the film unwinding mechanism are each provided with a cutter for cutting the material downstream.

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