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CN-224218756-U - Solar cell

CN224218756UCN 224218756 UCN224218756 UCN 224218756UCN-224218756-U

Abstract

The present utility model relates to a solar cell. The solar cell comprises a substrate, a grid line and a plurality of attachment blocks, wherein the grid line is fixedly arranged on the substrate, the attachment blocks are fixedly arranged on two sides of the grid line in a staggered mode along the length direction of the grid line, and the attachment blocks are fixedly arranged on the substrate. The attaching blocks which are arranged on the two sides of the grid line of the solar cell in a staggered way can enhance the fixing strength of the grid line on the substrate, so that the grid line is not easy to fall off from the substrate, the conductivity of the grid line is improved, and the photoelectric conversion efficiency of the solar cell is improved.

Inventors

  • YIN ZHIHAO
  • Yong Wenjiong

Assignees

  • 天合光能股份有限公司

Dates

Publication Date
20260508
Application Date
20250417

Claims (10)

  1. 1. A solar cell (100), characterized in that the solar cell (100) comprises: a substrate (4); a grid line fixedly arranged on the substrate (4), and The plurality of attachment blocks (11) are fixedly arranged on two sides of the grid line in a staggered mode along the length direction of the grid line, and the plurality of attachment blocks (11) are fixedly arranged on the substrate (4).
  2. 2. The solar cell (100) according to claim 1, wherein the grid lines and the attachment blocks (11) are fixedly arranged on the substrate (4) by means of an electroplating pattern.
  3. 3. The solar cell (100) according to claim 1, wherein the grid line comprises a main grid line (2) and a sub grid line (1), and the main grid line (2) and the sub grid line (1) intersect each other.
  4. 4. A solar cell (100) according to claim 3, characterized in that the solar cell (100) further comprises a solder strip, which solder strip is fixedly connected to the main grid line (2).
  5. 5. A solar cell (100) according to claim 3, characterized in that the diameter of the main grid line (2) is larger than the diameter of the auxiliary grid line (1).
  6. 6. The solar cell (100) according to claim 1, wherein the solar cell (100) further comprises a frame (3) fixedly arranged on the substrate (4), the frame (3) being connected to the grid line.
  7. 7. The solar cell (100) according to claim 1, wherein the material of the grid lines is pure copper or a copper alloy.
  8. 8. The solar cell (100) according to claim 1, wherein a surface of the grid line is provided with a protective layer.
  9. 9. The solar cell (100) according to claim 8, wherein the material of the protective layer is a silver alloy, a tin alloy or a nickel alloy.
  10. 10. The solar cell (100) according to claim 1, wherein the shape of the attachment block (11) is one of circular, polygonal and linear.

Description

Solar cell Technical Field The application relates to the technical field of solar cell manufacturing, in particular to a solar cell. Background A solar cell is a device that converts light energy into electric energy using a photovoltaic effect. The solar cell comprises a semiconductor cell, a backboard used for insulating and waterproof, a substrate arranged on the backboard and a frame for protecting the side edge of the cell, wherein the semiconductor cell is provided with a main grid line and a secondary grid line which are fixed on the substrate, and the main grid line and the secondary grid line are used for collecting electrons generated by the semiconductor cell to form current. At present, the materials of the main grid line and the auxiliary grid line on the battery piece in the prior art are usually copper alloy, so that the cost can be reduced under the condition of ensuring higher photoelectric conversion efficiency of the battery piece. However, such a main and sub-gate lines made of copper material are easily separated from the substrate due to stress under heating, reducing current conduction efficiency and correspondingly reducing photoelectric conversion efficiency of the solar cell. Accordingly, there is a need in the art for a new solution to the above-mentioned problems. Disclosure of utility model In order to solve or improve the technical problem that grid lines of a solar cell are easy to separate from a substrate in the prior art to a certain extent, the utility model provides the solar cell. The solar cell comprises a substrate, a grid line and a plurality of attachment blocks, wherein the grid line is fixedly arranged on the substrate, the attachment blocks are fixedly arranged on two sides of the grid line in a staggered mode along the length direction of the grid line, and the attachment blocks are fixedly arranged on the substrate. As will be appreciated by those skilled in the art, the solar cell of the present utility model includes a substrate, a grid line, and an attachment block. Wherein the substrate provides a suitable mounting area for the gate lines and the attachment pads. The two sides of the grid line are fixed with the attachment blocks, the attachment blocks are also fixed on the substrate, the fixing strength of the grid line on the substrate can be increased, the current conduction efficiency is improved, and the photoelectric conversion efficiency of the solar cell is improved. In addition, on the premise of ensuring enough fixing strength of the grid line on the substrate, the attaching block enables the grid line to be made into a finer shape, so that manufacturing materials of the grid line are saved, and cost is reduced. In addition, the structure that the attachment blocks are arranged on two sides of the grid line in a staggered manner can offset deformation internal stress generated by different stress directions and sizes of the grid line compared with the structure that the attachment blocks are arranged on two sides of the grid line in a parallel manner, so that the stability and strength of connection between the grid line and the substrate are improved, and the photoelectric conversion efficiency is further improved. In the above preferred technical solution of the solar cell, the grid line and the attachment block are fixedly disposed on the substrate by means of an electroplating pattern. Through the arrangement, the patterns of the grid lines and the attachment blocks are electroplated on the substrate, so that compared with a mask opening manufacturing mode, the manufacturing is more convenient, materials used for manufacturing are reduced, and the cost is reduced. In a preferred embodiment of the solar cell, the grid line includes a main grid line and a sub grid line, and the main grid line and the sub grid line intersect each other. By the arrangement, the main grid line and the auxiliary grid line are mutually intersected, electrons moving in the electric field of the semiconductor battery piece can be sufficiently collected, and photoelectric conversion efficiency is improved. In the above preferred technical solution of the solar cell, the solar cell further includes a solder strip, and the solder strip is fixedly connected with the main grid line. Through the arrangement, electrons collected on the main grid line are transmitted out of the semiconductor battery piece by the welding strip, so that effective output voltage is formed, and electric energy output is completed. In the preferred technical scheme of the solar cell, the diameter of the main grid line is larger than that of the auxiliary grid line. Through the arrangement, the diameter of the main grid line is larger than that of the auxiliary grid line, so that on one hand, the resistance of the main grid line is reduced, and on the other hand, the electric energy loss is reduced, the manufacturing materials of the auxiliary grid line are reduced, and the cost is reduced. In the a