Novel welding strip structure

Abstract

The utility model provides a novel solder strip structure, which is characterized in that the novel solder strip structure relates to the technical field of solar cells, the novel solder strip structure comprises a solder strip structure and a solar cell fixed at the bottom of the solder strip structure, the solder strip structure comprises a solder strip and a plurality of grooves fixed on the solder strip, the cross section of each groove is triangular, and the grooves are distributed along the direction of the solder strip. The width of the section of the groove is larger than the depth of the groove, and the welding strip is strip-shaped. Therefore, the light energy conversion rate of the solar cell panel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell technical field especially relates to a novel solder strip structure. BACKGROUND

[0002] With the rapid development of solar cell industry, silver consumption becomes the resource bottleneck of its future development, and reducing silver consumption is an important direction to reduce product cost and maintain the sustainable development of the industry. At present, solar cells gradually develop towards no main grid, and the no main grid technology can greatly reduce the silver consumption in the battery manufacturing process, and at the same time improve the conversion efficiency of the battery, but the no main grid battery still uses round solder strip or flat solder strip. In the related technology, when the battery piece has no main grid, the flat solder strip is interconnected with the fine grid line, which may exist the problem of solder strip shading, resulting in that the battery efficiency improvement cannot be reflected in the module, and the round solder strip is interconnected with the fine grid line, the contact area is small, the welding tension is low, and there may be product reliability risk.

[0003] The Chinese utility model patent with authorization number CN117457774B provides a solder strip structure for solar cell piece and solar cell, which comprises a plurality of solder strips distributed along a first direction at intervals, each solder strip extends along a second direction, each solder strip has a plurality of connection parts distributed along the second direction at intervals, and the plurality of connection parts are used for connecting with solder points in the solar cell piece; a connection structure comprises a plurality of connection segments arranged in an array, and a plurality of connection segments arranged along the second direction at intervals are arranged between adjacent solder strips, wherein each connection segment connects adjacent solder strips. The solder strip structure of the present application can not only avoid or reduce the offset of the solder strip in the positioning process, but also has insulation function due to the self-insulating part of the solder strip structure, so that the printing process and curing process for forming the insulating layer on the solar cell piece can be omitted in the process of preparing the solar cell piece.

[0004] However, the above-mentioned patent solar cell piece solder strip structure and solar cell have the problem of low light energy conversion rate when the solar cell works, and therefore a scheme is needed to improve this problem. UTILITY MODEL CONTENTS

[0005] The utility model discloses a novel solder strip structure to improve the conversion rate of solar cell panel to light energy.

[0006] The utility model provides a novel solder strip structure, including solder strip structure, and the solar cell of fixed solder strip structure bottom, the solder strip structure includes solder strip and sets up a plurality of grooves on the solder strip, the cross section of groove is three prismatic along the direction of distribution of solder strip, and the cross section width of groove is greater than groove depth, and the solder strip is strip -shaped.

[0007] The technical scheme is adopted, the solder strip is welded at the connecting position of the solar cell panel, the solder strip is in contact with the fine grid of the solar cell panel, and other surfaces of the solder strip form a certain angle with the surface of the solar cell panel, the sunlight irradiated on the surface of the solder strip is reflected into the solar cell panel, the light blocked by the solder strip can be effectively utilized, and the total light entering the solar cell panel is increased, thereby improving the conversion efficiency of the module.

[0008] Optionally, the solar cell comprises a solar cell panel and a fine grid line of the solar cell panel fixed on the solar cell panel, and the groove is connected with the fine grid line of the solar cell panel.

[0009] The technical scheme is adopted, the groove structure can be matched according to the morphology of the fine grid of the solar cell panel, when the solder strip is interconnected with the solar cell panel without a main grid, the dense groove structure can be combined with the fine grid line of the solar cell panel, the relative sliding of the solder strip during welding can be prevented, the stability of the welding process is improved, compared with the flat solder strip, the solder strip has a larger contact area with the fine grid line, the bonding force between the solder strip and the fine grid is increased, and the reliability of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 A schematic diagram of the overall structure of a novel solder strip structure is provided.

[0011] Figure 2 A schematic diagram of the interconnection of the solder strip and the fine grid of the solar cell of a novel solder strip structure is provided.

[0012] Figure 3 A partial enlarged view of the interconnection of the solder strip and the fine grid of the solar cell of a novel solder strip structure is provided.

[0013] Figure 4 A schematic diagram of the cross section of the interconnection of the solder strip and the fine grid of the solar cell of a novel solder strip structure is provided.

[0014] Mark 1, solder strip; 10, solder strip structure; 2, groove; 20, solar cell panel; 21, fine grid line of the solar cell panel. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meanings understood by those skilled in the art. The words such as "comprise" and similar words used herein mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, and do not exclude other elements or objects.

[0016] The embodiments of the present application provide a solder strip 1 structure and a solar cell fixed at the bottom of the solder strip 1 structure. The solder strip 1 structure comprises a solder strip 1 and a plurality of grooves 2 arranged on the solder strip 1. The cross section of the groove 2 is triangular and is distributed along the direction of the solder strip 1. The cross section width of the groove 2 is greater than the depth of the groove 2. The solder strip 1 is in a strip shape.

[0017] In fact, the main body of the solder strip 1 is in a triangular prism shape. The advantages of the large contact area of the existing flat solder strip 1 are retained, and the advantages of the existing circular solder strip 1 that can effectively utilize the solder strip 1 to shield light are combined. The arrangement of the groove 2 can effectively and quickly position the relative position of the main body of the solder strip 1 and the solar cell piece 20, ensure that the position does not deviate, greatly improve the process window of the welding step, and have better process compatibility. The size of the solder strip 1 can be reduced, the consumption of the solder strip 1 and the main body material of the solder strip 1 is further reduced, the groove 2 can effectively reduce the distance between the bottom of the solder strip 1 and the cell piece while increasing the contact area with the fine grid, after the gap is reduced, the adhesive film is not easy to enter between the solder strip 1 and the fine grid during the laminating process in the component preparation process, and the contact between the solder strip 1 and the cell is not affected, which is conducive to improving the reliability of the component product.

[0018] In some embodiments, the solar cell comprises a solar cell piece 20 and a cell piece fine grid line fixed on the solar cell piece 20. The groove 2 is connected with the cell piece fine grid line.

[0019] In fact, the cross-sectional shape of the groove 2 of the welding strip 1 can also be matched according to the cross-sectional shape of the fine grid of the battery piece, and the cross-sectional shape of the groove 2 can be triangular, and the main principle is that the cross-sectional width of the groove 2 is greater than or equal to the depth of the groove 2, and specifically, the groove 2 of the welding strip 1 can be designed according to whether the fine grid is locally thickened, and the corresponding welding strip 1 pressing process adopts the corresponding tool to periodically press, and the groove 2 can be filled with part of the welding component, and in the welding process, the solder in the groove 2 is heated and melted, and can flow into the gap between the groove 2 and the fine grid, effectively increasing the contact area and contact tension of the welding strip 1 and the fine grid, improving the conductivity and also improving the product reliability.

[0020] Although the embodiments of the present application have been described in detail above, it is obvious to those skilled in the art that various modifications and changes can be made to the embodiments. However, it should be understood that such modifications and changes all fall within the scope and spirit of the present application as described in the claims. Moreover, the present application described herein can have other embodiments, and can be implemented or realized in various ways.

Claims

1. A novel welding strip structure, characterized in that, The invention includes a solder strip structure and a solar cell fixed to the bottom of the solder strip structure. The solder strip structure includes a solder strip and multiple grooves disposed on the solder strip. The grooves have a triangular cross-section distributed along the direction of the solder strip, and the width of the groove cross-section is greater than the depth of the groove. The solder strip is strip-shaped.

2. The novel welding strip structure according to claim 1, characterized in that, The solar cell includes a solar cell and fine grid lines fixed on the solar cell, with trenches connected to the fine grid lines.

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