Solar cell piece group and preparation method thereof
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A technology of solar cells and cells, which is applied in the field of solar cells and can solve problems such as infirmity and cracks
Pending Publication Date: 2021-06-11
LONGI SOLAR TECH (TAIZHOU) CO LTD
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Problems solved by technology
[0004] The invention provides a solar battery sheet group to solve the problem that the existing solar b...
Method used
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Embodiment 1
[0073] refer to figure 2 , shows a solar battery sheet group 10, the solar battery sheet group includes: including at least two solar battery sheets 11;
[0074] In the embodiment of the present invention, refer to image 3 , the battery sheet 11 has a lower surface a and an upper surface b, and includes a convex structure 111 and a concave structure 112;
[0075] The raised structure 111 is an outwardly raised raised structure formed on the lower surface a of the battery sheet 11;
[0076] The recessed structure 112 is an inwardly recessed recessed structure formed on the upper surface b of the battery sheet 11;
[0077] refer to image 3 , the lowest point Q of the concave structure 112 is lower than the plane where the upper surface b is located;
[0078] The protruding structure 111 and the concave structure 112 are respectively arranged at two ends of the battery sheet 11 .
[0079] Wherein, the concave structure and the convex structure can be arranged at both ends...
Embodiment 2
[0125] refer to Figure 5 , which shows a flow chart of the steps of a method for preparing a solar cell group provided by an embodiment of the present invention; the preparation method specifically includes the following steps:
[0126] Step 201, providing a cleaned silicon wafer.
[0127] In the embodiment of the present invention, the size of the silicon wafer is selected according to the number and size of the required solar cells of the solar cell group, and then the silicon wafer is ultrasonically cleaned with deionized water to make the surface of the silicon wafer dust-free.
[0128] Step 202, etching the lower surface of the silicon wafer to prepare a plurality of raised structures, wherein each raised structure is arranged side by side.
[0129] In the embodiment of the present invention, refer to Image 6 , showing the lower surface of the wafer, refer to Figure 8 , is the front view of the wafer. It can be seen that a plurality of raised structures prepared on...
Embodiment 3
[0163] refer to Figure 10 , which shows a flow chart of the steps of a method for preparing a solar cell group provided by an embodiment of the present invention; the preparation method specifically includes the following steps:
[0164] Step 301, providing a cleaned silicon wafer.
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Abstract
The embodiment of the invention provides a solar cell piece group and a preparation method thereof. Thesolar cell piece group comprises at least two cell pieces; the cell piece is provided with a lower surface and an upper surface, and comprises a convex structure and a concave structure; the convex structures are convex structures which are formed on the lower surfaces of the cell pieces and are convex outwards; the concave structure is formed on the upper surface of the cell piece and is concave inwards, and the lowest point of the concave structure is lower than the plane where the upper surface is located; the convex structure and the concave structure are respectively arranged at two ends of the cell piece; and the convex structures of the cell pieces are matched with the concave structures of the adjacent cell pieces, so that the connection of the adjacent cell pieces is realized. According to the embodiment of the invention, the mutual connection of the plurality of cell pieces is realized through the convex structures and the concave structures, so that the hidden crack risk of the overlapped parts of the cell pieces is avoided, the connection between the cell pieces is firm, and the cell pieces are not loosened to generate relative sliding in the conveying process of the solar cell piece group.
Description
technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell group and a method for preparing the solar cell group. Background technique [0002] At present, the cells of the solar cell group are usually connected by soldering strips or conductive glue. In the process of solar battery packs, the overlapping parts of cells are more likely to have the risk of cracks, and if the ribbon technology is used, the risk of cracks is greater. [0003] At the same time, the solar cell group connected by conductive glue, refer to figure 1 , A is the first battery piece, B is the second battery piece, the first battery piece A and the second battery piece B are connected by conductive glue C, if the conductive glue is printed too much, it will overflow when the battery piece and the battery piece overlap Pollution will be caused to the front of the cell, and if the conductive adhesive is printed too little, the bond between the cells...
Claims
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Application Information
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