Battery piece with non-uniformly distributed grid lines

A technology of uniform distribution and battery slices, which is applied to circuits, electrical components, semiconductor devices, etc., can solve the problems of crystalline silicon and battery process difficulty, uneven electrical performance of battery process, and increase the manufacturing cost of battery slices, etc., to achieve relief adverse effects

Pending Publication Date: 2021-06-15
TRINASOLAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in the size of the silicon wafer will lead to greater difficulty in the process of crystalline silicon and batteries, especially affecting the uniformity of the performance of the silicon wafer. The increase in the size of the silicon wafer may lead to uneven distribution of resistivity in the wafer, with obvious differences in the middle and around the wafer. The larger the size of the silicon wafer may also lead to the inhomogeneity of the electrical performance of the battery process, there is a significant difference between the middle and the surrounding
The uneven performance of silicon wafers will lead to uneven performance of solar cells. For example, the series resistance (RS) of solar cells will be very uneven, which will increase the scrap rate of solar cells and increase the manufacturing cost of solar cells.

Method used

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  • Battery piece with non-uniformly distributed grid lines
  • Battery piece with non-uniformly distributed grid lines
  • Battery piece with non-uniformly distributed grid lines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as Figure 1-Figure 2 As shown, the sub-grid lines 3 of the battery sheet in which the grid lines are unevenly distributed in this embodiment are arranged in multiple rows, the sub-grid line spacing a of the multiple sub-grid lines 3 is equal, and the sub-grid width of the sub-grid lines 3 has multiple A size specification. Specifically, as figure 1 As shown, the sub-gate line 3 located in the middle has a smaller sub-gate width, while the sub-gate lines located on both sides have a larger width. Such as figure 2 As shown, the sub-gate line 3 located in the middle has a larger sub-gate width, while the sub-gate lines located on both sides have a smaller width.

Embodiment 2

[0054] Such as Figure 3-Figure 4 As shown, in this embodiment, the sub-grid lines 3 of the battery sheet with unevenly distributed grid lines are arranged in multiple rows, the sub-grid widths of the multiple sub-grid lines 3 are equal, and the sub-grid line spacing a of the sub-grid lines 3 has multiple rows. A size specification. Specifically, as image 3 As shown, the sub-grid spacing a of the sub-grid lines 3 located in the middle is relatively small, while the sub-grid spacing a of the sub-grid lines on both sides is relatively large, and the sub-grid spacing a gradually increases from the middle to both sides. Such as Figure 4 As shown, the sub-grid line spacing a of the sub-grid lines 3 located in the middle is larger, while the sub-grid line spacing a of the sub-grid lines located on both sides is smaller, and the sub-grid line spacing a gradually decreases from the middle to both sides.

Embodiment 3

[0056] Such as Figure 5-Figure 6 As shown, the sub-grid lines 3 of the battery sheet in which the grid lines are not uniformly distributed in this embodiment are arranged in multiple rows and columns, the sub-grid width and the sub-grid line spacing a of the multiple sub-grid lines 3 are equal, and the sub-grid lines 3 The sub-grid pitch b has various sizes and specifications. The auxiliary grid lines 3 arranged vertically are continuous lines. Specifically, as Figure 5 As shown, the vertical sub-grid lines 3 are located on both sides of the lateral sub-grid lines 3 . Such as Figure 6 As shown, the vertical sub-grid lines 3 are located in the middle of the lateral sub-grid lines 3 .

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Abstract

The invention discloses a battery piece with non-uniformly distributed grid lines. The battery piece comprises a body, wherein main grid lines and auxiliary grid lines are arranged on the body, the main grid lines are arranged in multiple rows and multiple columns, pad points are arranged on cross points of the main grid lines, the auxiliary grid lines are arranged in multiple rows, the pad points have various size specifications and shape specifications, and / or the auxiliary grid line spacing of the auxiliary grid lines has multiple dimensions, and / or the auxiliary grid width of the auxiliary grid lines has multiple dimensions. According to the battery piece with the non-uniformly distributed grid lines, since the pad points of the battery piece have various size specifications and shape specifications, the auxiliary grid line spacing of the auxiliary grid lines has various size specifications, and the auxiliary grid width of the auxiliary grid lines has various size specifications; and in the actual design process, the adverse effect of uneven silicon wafer performance on the electrical performance of the battery piece can be relieved through the pattern design of the grid lines according to actual needs.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a battery sheet with non-uniform distribution of grid lines. Background technique [0002] With the development of the photovoltaic industry, the cost of electricity per unit of electricity has become an important consideration, and the increase in the size of silicon wafers is the trend of the industry to reduce the cost of electricity per unit of electricity. However, the increase in the size of the silicon wafer will lead to greater difficulty in the process of crystalline silicon and batteries, especially affecting the uniformity of the performance of the silicon wafer. The increase in the size of the silicon wafer may lead to uneven distribution of resistivity in the wafer, with obvious differences in the middle and around the wafer. The larger the size of the silicon wafer may also lead to the inhomogeneity of the electrical performance of the battery process, there is a s...

Claims

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Application Information

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IPC IPC(8): H01L31/0224
CPCH01L31/022425
Inventor 陈红张学玲李森吴剑峰陈奕峰谢宇贾保明翟敏
Owner TRINASOLAR CO LTD
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