Composite photovoltaic cell welding strip pressing tool
By designing a composite photovoltaic cell welding belt compression tooling and using a combination of large and small needles, the problem of poor welding of 0BB main gateless cell cells is solved, and better welding results are achieved.
Patent Information
- Application Number
- CN202422300667.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing welding tape compression tooling cannot effectively match the welding requirements of 0BB main gateless battery cells, resulting in poor welding problems, such as dummy welding and over-welding.
A composite photovoltaic cell welding tape compression tool is designed, using a combination of large and small needles to press welding tapes with PAD points and PAD points positions respectively. The frame structure is designed to adapt to cell cells with different PAD distributions.
Effective compression of different PAD distribution cell pieces is achieved, avoiding welding tape offset, improving welding quality, ensuring good welding, and avoiding dummy and over-welding.
Smart Images
Figure CN223070811U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of photovoltaic cell processing, and in particular relates to a composite photovoltaic cell welding strip pressing tool. Background Art
[0002] String welding is an important part of the photovoltaic module production process, which involves connecting multiple photovoltaic cells in series through tin-coated copper strips (commonly known as welding strips) to form a complete circuit. Photovoltaic cell welding strip clamping tooling is indispensable in the cell welding process. It ensures the smooth progress of the welding process through precise positioning, fixation and pressure control, which is of great significance to improving the performance and reliability of photovoltaic modules.
[0003] At present, in the photovoltaic industry, there are roughly two types of solder ribbon pressing tools, one is the large pressing needle tool, and the other is the small pressing needle tool, also known as the dense pressing needle tool. This type of tool can only match the same type of cells with PAD points. In recent years, 0BB busbarless cells have been widely promoted in the photovoltaic industry. In order to better weld busbarless cells, some busbarless cells have adopted the design of retaining the PAD points at both ends and canceling the middle pad point. With the development of cell technology, there may be cells with uneven distribution of PAD points, and the traditional large pressing needle tool or small pressing needle tool can no longer meet the welding requirements of such cells. The large pressing needle tool will cause poor welding such as cold welding and over-welding at positions where the PAD point is small or absent; while the small pressing needle tool will cause poor welding such as cold welding and over-welding at normal PAD points. Therefore, the existing solder ribbon pressing tool can no longer fully match the welding requirements of cells with different PAD requirements.
[0004] Therefore, it is necessary to propose a composite photovoltaic cell strip pressing tool to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a composite photovoltaic cell sheet welding strip pressing tool to solve the above-mentioned technical problems existing in the prior art.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A composite photovoltaic cell welding strip pressing tool comprises a tool frame, fixed presses are arranged on both sides of the tool frame, the tool frame comprises a plurality of frame crossbeams and frame longitudinal beams which are vertically staggered in a grid pattern, and the same number of pressing pins are evenly distributed on each of the frame crossbeams, the pressing pins are divided into a first pressing pin and a second pressing pin, the size of the first pressing pin is larger than the second pressing pin, the first pressing pin is used to press the welding strip at the position corresponding to the PAD point on the photovoltaic cell, and the second pressing pin is used to press the welding strip at the position without the PAD point on the photovoltaic cell.
[0008] Preferably, the pressing needles on the two frame cross beams at the edge of the tooling frame are all first pressing needles, and the pressing needles on the remaining frame cross beams are all second pressing needles.
[0009] Preferably, the frame longitudinal beam extends outwards on both sides at the position in the middle between two adjacent frame cross beams, and a secondary cross beam is connected to the secondary cross beam, and a second pressing needle is connected to the secondary cross beam.
[0010] Preferably, the pressing needle is detachably connected to the tooling frame.
[0011] Preferably, the pressing needle is elastically connected to the tooling frame along its downward pressing direction.
[0012] Preferably, a plurality of stepped holes penetrating up and down are equally spaced along the length direction of the frame cross beam, the pressing needle includes a pressing needle rod elastically penetrating through the stepped hole, one end of the pressing needle rod is fixedly connected with a pressing needle head, and the other end is connected with a limiting member with an outer diameter larger than the stepped hole.
[0013] Preferably, a spring is sleeved outside the pressing needle rod above the pressing needle head, one end of the spring is fixedly connected in the stepped hole, and the other end abuts against the surface of the pressing needle head facing the stepped hole.
[0014] Preferably, the pressing needle head has a circular downward pressing surface, and the circular downward pressing surface is provided with grid lines.
[0015] Preferably, the downward pressing compression strokes of a plurality of the pressing needles in the same row or the same column are the same.
[0016] Compared with the prior art, the present invention discloses at least the following beneficial effects:
[0017] The composite photovoltaic cell ribbon pressing tooling of the present invention can distribute the types of pressing needles according to the cell mesh plate and in combination with different PAD conditions, and can better press the ribbon and the cell during actual use, so as to complete the welding process of the cell string, make the ribbon and the cell welded well after processing, and solve the problem of poor welding in different regions of the cell. Description of the Drawings
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
[0019] Figure 1 It is a working surface view (bottom view) of the ribbon pressing tooling according to the embodiment of the present invention;
[0020] Figure 2 This is the front view of the solder tape pressing tooling for the embodiment of the present utility model;
[0021] Figure 3 This is the top view of the solder tape pressing tooling for the embodiment of the present utility model;
[0022] Figure 4 is Figure 1 the partial enlarged view at position A in
[0023] Figure 5 is Figure 2 the partial enlarged view at position B in
[0024] In the figure: 1, tooling frame; 2, fixed clamp; 3, first pressing needle; 4, second pressing needle; 11, frame cross beam; 12, frame longitudinal beam; 13, hollow part; 14, auxiliary cross beam; 31, pressing needle head; 32, pressing needle rod; 33, limiting part. Specific embodiments
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0026] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0027] Referring to Figures 1 to 5 as shown, the present utility model provides a composite solder tape pressing tooling for photovoltaic cells, including a tooling frame 1, fixed clamps 2 located on both sides of the tooling frame 1, and a plurality of pressing needles elastically connected to the tooling frame 1 in a rectangular array; wherein, the tooling frame 1 includes a plurality of frame longitudinal beams 12 arranged at equal intervals in the transverse direction, and a plurality of frame cross beams 11 arranged at equal intervals in the longitudinal direction. The frame cross beams 11 and the frame longitudinal beams 12 are vertically and crosswise arranged in a grid pattern and form a plurality of hollow parts 13; the hollow parts 13 can facilitate the passage of light during welding, enabling the light to directly irradiate the battery cells. Both the frame cross beams 11 and the frame longitudinal beams 12 are narrow strip structures with a small width; the same number of pressing needles are equally spaced on each of the frame cross beams 11. The pressing needles are divided into a first pressing needle 3 and a second pressing needle 4. The first pressing needle 3 is a large pressing needle, and the second pressing needle 4 is a small pressing needle. The size of the first pressing needle 3 is larger than that of the second pressing needle 4. The first pressing needle 3 is used to press the solder tape at the position corresponding to the PAD point on the photovoltaic cell, and the second pressing needle 4 is used to press the solder tape at the position without a PAD point on the photovoltaic cell.
[0028] In the above embodiments, the tooling frame 1 is integrally formed, made of stainless steel, having good corrosion resistance and high temperature resistance, and having sufficient mechanical strength. The two sides of the tooling frame 1 are fixedly connected with the fixed clamps 2, and the fixed clamps 2 are provided with anti-slip pads. Two anti-slip pads are evenly distributed on each fixed clamp 2, and the four anti-slip pads are symmetrically distributed in pairs on the two fixed clamps 2 to help accurately position and improve accuracy.
[0029] In the above embodiments, several pressure pins are distributed in rows / columns on the tooling frame 1, and the downward compression strokes of the multiple pressure pins located in the same row or the same column are the same.
[0030] In the above embodiments, the pressure pin head 31 has a circular downward pressing surface, and the circular downward pressing surface is provided with grid patterns. The downward pressing surface adopts a grid pattern structure, which can adapt to different shapes of welding tapes. For example, when pressing a circular welding tape, the grid patterns can better form a tight press to prevent the welding tape from shifting.
[0031] In a specific embodiment, the pressure pins on the two frame crossbeams 11 at the edge of the tooling frame 1 are all the first pressure pins 3, and the pressure pins on the remaining frame crossbeams 11 are all the second pressure pins 4. The welding tape pressing tooling with this structure can be applied to some main-gridless solar cells. This part of the main-gridless solar cells adopts a structural design of retaining the two-end PAD points and canceling the middle PAD points. For this structure, in this specific embodiment, the pressure pins adopt a layout method with large pressure pins at the edge and small pressure pins in the middle. The large pressure pins at the edge are used to press the positions with PAD points, and the small pressure pins in the middle are used to press the positions without PAD points, which can well match the welding tapes and solar cells at the corresponding positions and avoid problems such as welding tape shifting during welding.
[0032] In a specific embodiment, the frame longitudinal beam 12 extends outwards on both sides at the position between two adjacent frame crossbeams 11 to form auxiliary crossbeams 14, and the second pressure pins 4 are connected to the auxiliary crossbeams 14. This structural design can reduce the number of frame crossbeams 11 and increase the area of the hollow part 13, which can not only reduce the material cost of the tooling but also be of great help in improving the welding quality.
[0033] In a specific embodiment, the pressure pins are detachably elastically connected to the tooling frame 1. The pressure pins are elastically connected to the tooling frame 1 along their downward pressing directions. Specifically, a number of stepped holes penetrating through the upper and lower parts are equally spaced along the length direction of the frame crossbeam 11. The pressure pin includes a pressure pin rod 32 elastically penetrating through the stepped holes. One end of the pressure pin rod 32 is fixedly connected with the pressure pin head 31, and the other end is connected with a limiting member 33 whose outer diameter is larger than the stepped hole.
[0034] Further, a spring is sleeved outside the needle pressing rod 32 above the needle pressing head 31. One end of the spring is fixedly connected inside the stepped hole, and the other end abuts against the surface of the needle pressing head 31 facing the stepped hole.
[0035] In view of the problem that the existing solder ribbon pressing tooling on the market cannot meet the welding requirements of OBB non-main grid solar cells, the embodiment of the present utility model provides a composite photovoltaic cell solder ribbon pressing tooling. During actual production and use, according to the cell screen printing plate, the composite pressing needle is customized and used on the string welding machine. The pressing needle just presses the corresponding solder ribbon and the solar cell, avoiding problems such as solder ribbon deviation during welding. Moreover, the pressing needle will not affect the glue printing effect. The large pressing needle can prevent virtual soldering at the PAD point welding part of the dispensing, resulting in EL shadows. The small pressing needle can prevent virtual soldering at the non-PAD point welding part of the dispensing, resulting in EL shadows, significantly improving the welding quality of the entire solar cell.
[0036] The details not described in the present utility model are conventional technical means well known to those skilled in the art.
[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0038] The above-described embodiments are only used to describe the preferred mode of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present utility model shall fall within the protection scope determined by the claims of the present utility model.
Claims
1. A composite photovoltaic cell solder strip pressing tooling, characterized in that, It includes a tooling frame (1), with fixed clamps (2) provided on both sides of the tooling frame (1). The tooling frame (1) includes multiple grid-like vertically intersecting frame cross beams (11) and frame longitudinal beams (12). On each of the frame cross beams (11), the same number of pressure pins are equally spaced. The pressure pins are divided into first pressure pins (3) and second pressure pins (4). The size of the first pressure pins (3) is larger than that of the second pressure pins (4). The first pressure pins (3) are used to press the solder tapes at the positions corresponding to the PAD points on the photovoltaic cell, and the second pressure pins (4) are used to press the solder tapes at the positions without PAD points on the photovoltaic cell.
2. The composite photovoltaic cell solder strip pressing tool according to claim 1, characterized in that, The pressure pins on the two frame cross beams (11) at the edge of the tooling frame (1) are all first pressure pins (3), and the pressure pins on the remaining frame cross beams (11) are all second pressure pins (4).
3. The composite photovoltaic cell soldering strip pressing tooling according to claim 2, characterized in that, On the frame longitudinal beam (12), at the position in the middle between two adjacent frame cross beams (11), auxiliary cross beams (14) extend towards both sides, and second pressure pins (4) are connected to the auxiliary cross beams (14).
4. The composite photovoltaic cell ribbon pressing tooling according to claim 1, characterized in that, The pressure pins are detachably connected to the tooling frame (1).
5. The composite photovoltaic cell solder strip pressing tool according to claim 4, characterized in that, The pressure pins are elastically connected to the tooling frame (1) along their downward pressing directions.
6. The composite photovoltaic cell solder tape pressing tooling according to claim 5, characterized in that, On the frame cross beam (11), a number of stepped holes penetrating up and down are equally spaced along its length direction. The pressure pin includes a pressure pin rod (32) elastically penetrating through the stepped holes. One end of the pressure pin rod (32) is fixedly connected to a pressure pin head (31), and the other end is connected with a limiting member (33) whose outer diameter is larger than the stepped hole.
7. The composite photovoltaic cell ribbon pressing tooling according to claim 6, characterized in that, A spring is sleeved outside the pressure pin rod (32) above the pressure pin head (31). One end of the spring is fixedly connected inside the stepped hole, and the other end abuts against the surface of the pressure pin head (31) facing the stepped hole.
8. The compacting tool for the welding strip of the composite photovoltaic cell according to claim 7, characterized in that, The pressure pin head (31) has a circular downward pressing surface, and the circular downward pressing surface is provided with grid patterns.
9. The composite photovoltaic cell ribbon pressing tooling according to claim 1, characterized in that The downward compression strokes of multiple pressure pins in the same row or the same column are the same.