Magnetic fixture for horizontal coating of solar cell

Abstract

The utility model discloses a magnetic fixture for horizontal coating of a solar cell, which comprises a fixture main board, cell placing grids are uniformly arranged on the fixture main board, conductive contacts are respectively arranged on the fixture main board on two sides of each cell placing grid, a guide pillar and an iron block are fixedly welded on the surface of the fixture main board, and the iron block is arranged on the surface of the fixture main board. A side pressing plate and an inner pressing plate are arranged above the clamp main plate, at least two guide holes are formed in the side pressing plate and the inner pressing plate and matched with corresponding guide columns on the clamp main plate, and matched magnets are arranged on the side pressing plate and the inner pressing plate and correspond to iron blocks on the clamp main plate. The side pressing plate and the inner pressing plate are provided with corresponding conductive elastic pieces corresponding to the conductive contacts, and the edge of the clamp main plate is further provided with at least two elastic steel brushes communicated with a cathode conductive device. The clamp adopts magnet attraction to replace spring pressure, so that the risk that the plating solution is accumulated is reduced, and the problem that a spring type clamp easily brings residual plating solution into the next working procedure to cause adverse effects on subsequent production of the battery piece is solved.

Description

Technical Field

[0001] The utility model relates to a field, in particular to a magnetic adsorption fixture for horizontal coating of solar cell wafers. Background Art

[0002] At present, for horizontal coating, a spring-type fixture is used to load the cell wafers for horizontal coating. This fixture uses multiple compression springs to press the fixture pressing plate, and then uses the conductive elastic sheets on the fixture pressing plate to press and conduct electricity on the cell wafers. Due to the special structure of the springs, after electroplating, the plating solution is more likely to remain at the springs. When the spring-type fixture finishes coating, the plating solution still cannot flow away smoothly from the springs. Therefore, in the long run, more residual plating solution will be brought into the next process by the spring-type fixture, which will have an adverse impact on the production of cell wafers and increase the maintenance cost.

[0003] Therefore, we need to design a new fixture for horizontal coating, which can solve the problem of plating solution accumulation and is easier to realize mass production of coating automation. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a magnetic adsorption fixture for horizontal coating of solar cell wafers. After the magnetic force of the magnet replaces the spring pressure, the risk of the plating solution being accumulated in the magnetic adsorption fixture is reduced.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a magnetic adsorption fixture for horizontal coating of solar cell wafers, including a fixture main board. The fixture main board is evenly arranged with cell wafer placement grids. Conductive contacts are respectively arranged on the fixture main board on both sides of each cell wafer placement grid. Guide posts and iron blocks are fixedly welded on the surface of the fixture main board. A side pressing plate and an inner pressing plate are arranged above the fixture main board. At least two guide holes are arranged on the side pressing plate and the inner pressing plate to cooperate with the corresponding guide posts on the fixture main board. Magnets adapted to the iron blocks on the fixture main board are arranged on the side pressing plate and the inner pressing plate. Corresponding conductive elastic sheets are arranged on the side pressing plate and the inner pressing plate corresponding to the conductive contacts. At least two elastic steel brushes for connecting to the cathode conductive device are also arranged on the edge of the fixture main board.

[0006] Further, the cell wafer placement grids are set to n columns and m rows according to process requirements, where n or m is 1 - 30.

[0007] Further, the number of conductive contacts arranged in each cell wafer placement grid is 4 - 20.

[0008] Further, the top ends of the guide posts are arc-shaped and are in contact with the guide holes of the corresponding processed shapes for conduction.

[0009] Further, the number of the magnets and the iron blocks is 1 - 10, and the shape of the magnets is square or oval.

[0010] Further, the side pressing plate is arranged at the outer peripheral edge of the solar cell placement grid, and the inner pressing plate is arranged between adjacent solar cell placement grids.

[0011] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

[0012] The present invention adopts a horizontal coating method with a magnetic chuck to coat the surface of the solar cell. After the magnetic force of the magnet replaces the spring pressure, the shape and structure of the magnet are relatively regular, and the magnet is flatly embedded on the chuck pressing plate. The iron block is flatly embedded at the magnet position of the chuck main board corresponding to the chuck pressing plate. The suction force between the magnet on the chuck pressing plate and the iron block on the chuck main board is used to press the solar cell tightly. After the magnet is embedded on the surface of the chuck pressing plate and the iron block is embedded on the chuck main board, both are relatively smooth and flat, reducing the risk of plating solution being accumulated on the magnetic chuck, thereby solving the adverse effect caused by the spring-type chuck easily bringing residual plating solution into the next process and affecting the subsequent production of the solar cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0014] Figure 1 is a schematic three-dimensional structure diagram of an embodiment of the present invention;

[0015] Figure 2 is a schematic front view structure diagram of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] Embodiment

[0018] Refer to Figure 1 、 Figure 2, A magnetic chuck for horizontal coating of solar cells, comprising a chuck main board 1. There are four cell placement grids 11 arranged in two columns and two rows on the chuck main board 1. Six conductive contacts 9 are respectively arranged on the chuck main board 1 on both sides of each cell placement grid 11. Guide posts 10 and iron blocks 6 are fixedly welded on the surface of the chuck main board 1. A side pressing plate 3 and an inner pressing plate 4 are arranged above the chuck main board 1. The side pressing plate 3 is arranged on the outer peripheral edge of the cell placement grid 11, and the inner pressing plate 4 is arranged between adjacent cell placement grids 11. Two guide holes 7 are arranged on the side pressing plate 3 and the inner pressing plate 4 to cooperate with the corresponding guide posts 10 on the chuck main board 1. The top end of the guide post 10 is arc-shaped and contacts the processed corresponding-shaped guide hole for conduction. Corresponding to the iron blocks 6 on the chuck main board 1, the side pressing plate 3 and the inner pressing plate 4 are provided with adapted magnets 2. The shape of the magnet 2 is square. Six conductive elastic sheets 8 are arranged on the side pressing plate 3 and the inner pressing plate 4 corresponding to the conductive contacts 9. Two elastic steel brushes 5 for connecting to the cathode conductive device are also arranged on the edge of the chuck main board 1.

[0019] When the magnetic chuck works, the feeding device first lifts the side pressing plate 3 and the inner pressing plate 4 to a certain height; then places the solar cells into the corresponding positions on the chuck main board 1, and then the feeding device returns the side pressing plate 3 and the inner pressing plate 4 to their original positions. After the solar cells are placed on the chuck main board 1, the side pressing plate 3 or the inner pressing plate 4 and the chuck main board 1 are mainly held on the chuck main board 1 by the mutual suction force of the magnets 2 and the iron blocks 6, and their relative positions with the main board are mainly maintained by the cooperation of the guide posts 10 and the guide holes 7; the current flows from the cathode conductive device through the steel brush 5 to the chuck main board 1, and the current on the chuck main board 1 then flows through the conductive contacts 9 to the back contacts of the solar cells; the current on the front of the solar cells flows through the contact between the guide posts 10 on the chuck main board 1 and the guide holes 7 to the side pressing plate 3 and the inner pressing plate 4, and then flows through the conductive elastic sheets 8 to the front of the solar cells; during the coating process of the magnetic chuck, the two steel brushes 5 on the chuck main board 1 are always in sliding contact with the cathode conductive device. Since the steel brush 5 has elasticity, it not only ensures the smooth and stable transmission of the magnetic chuck, but also ensures the continuity of the current on the solar cells.

[0020] The present utility model adopts the horizontal coating method of the magnetic chuck to realize the coating on the surface of the solar cells. After replacing the spring pressure with the magnetic attraction of the magnets, the shape and structure of the magnets are relatively regular, and the magnets are flatly embedded on the chuck pressing plate. The iron blocks are flatly embedded at the positions of the magnets on the chuck main board corresponding to the chuck pressing plate. The suction force of the magnets on the chuck pressing plate and the iron blocks on the chuck main board is used to press the solar cells for conduction. After the magnets are flatly embedded on the chuck pressing plate and the iron blocks are flatly embedded on the chuck main board, they are relatively smooth and flat, reducing the risk of the plating solution being accumulated on the magnetic chuck, thereby solving the adverse impact on the subsequent production of the solar cells caused by the spring-type chuck easily bringing residual plating solution into the next process.

[0021] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A magnetic fixture for horizontal coating of solar cells, characterized in that: It includes a fixture main board (1), on which battery cell placement grids (11) are evenly arranged. Conductive contacts (9) are respectively arranged on the fixture main board (1) on both sides of each battery cell placement grid (11). Guide posts (10) and iron blocks (6) are fixedly welded on the surface of the fixture main board (1). A side pressing plate (3) and an inner pressing plate (4) are arranged above the fixture main board (1). At least two guide holes (7) are arranged on the side pressing plate (3) and the inner pressing plate (4) to cooperate with the corresponding guide posts (10) on the fixture main board (1). Magnets (2) adapted to the iron blocks (6) on the fixture main board (1) are arranged on the side pressing plate (3) and the inner pressing plate (4). Conductive elastic sheets (8) corresponding to the conductive contacts (9) are arranged on the side pressing plate (3) and the inner pressing plate (4). At least two elastic steel brushes (5) connecting to the cathode conductive device are also arranged on the edge of the fixture main board (1).

2. The magnetic chuck for horizontal coating of solar cells according to claim 1, wherein: The battery cell placement grids (11) are set to be n columns and m rows according to process requirements, where n or m is 1 - 30.

3. The magnetic chuck according to claim 1 for horizontal coating of solar cells, characterized in that: The number of conductive contacts (9) arranged in each battery cell placement grid (11) is 4 - 20.

4. The magnetic adsorption fixture for horizontal coating of solar cells according to claim 1, characterized in that: The top end of the guide post (10) is arc-shaped to contact and conduct electricity with the guide hole of the corresponding processed shape.

5. The magnetic chuck for horizontal coating of solar cells according to claim 1, characterized in that: The number of the magnets (2) and the iron blocks (6) arranged is 1 - 10, and the shape of the magnet (2) is square or oval.

6. The magnetic chuck according to claim 1 for horizontal coating of solar cells, characterized in that: The side pressing plate (3) is arranged on the outer periphery of the battery cell placement grid (11), and the inner pressing plate (4) is arranged between adjacent battery cell placement grids (11).

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