Double-sided battery back electrode and preparation method and application thereof

A back electrode, double-sided battery technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of increasing manufacturing costs and not being able to be promoted in batches, and achieve the effect of reducing height, shortening current collection paths, and reducing limitations

Pending Publication Date: 2021-06-04
TONGWEI SOLAR (JINTANG) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of silver grid lines on the back electrode will significantly increase the manufacturing cost, so that it cannot be popularized in batches

Method used

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  • Double-sided battery back electrode and preparation method and application thereof
  • Double-sided battery back electrode and preparation method and application thereof
  • Double-sided battery back electrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The double-sided battery of the present embodiment includes an aluminum main gate 1 and an aluminum sub-grid 2, wherein the number of aluminum main grids 1 is 9, and the aluminum main grid 1 is provided with a ring type aluminum in which the interval spaced apart in length direction is provided. The main grid 102, and both ends of all ring type aluminum main grids 102 have two aluminum fine main grids 101 to exogenous design. The outer side of the rings-type aluminum main grid 102 is connected to the outer side of the aluminum fine aluminum side gate 201, and the inner side of the aluminum fine main grid 101 is connected to the vertical distribution of longitudinal aluminum sub-gate 202, Aluminum sub-gate 2 has a width of 100 μm, and adjacent transverse aluminum sub-grids 201 and adjacent longitudinal aluminum sub-gate 202 are 1.00 mm.

[0052] The inside of the ring type aluminum main grid 102 is provided with a back silver electrode 3, and the number of segments of the ba...

Embodiment 2

[0072] The double-sided battery of the present embodiment is substantially the same in the first embodiment, and the difference is mainly in that the number of the aluminum main grid 1 is 11, and the width of the aluminum sub-gate 2 is 60 μm, and adjacent lateral aluminum. The spacing of the sub-gate 201 and adjacent longitudinal aluminum side 202 is 0.8 mm. In this embodiment, the number of segments of the back silver electrode 3 on the same main grid is 8, which is 1.2 mm, which is 5.4 mm in length, and the ring type width of the ring type aluminum main grid 102 is 0.6mm, and the inner ring width is 1.0. MM, the inner ring length is 5.8 mm. The aluminum fine main grill uses 0.5 mm / 0.42 mm / 0.10 mm three-stage bamboo gradient structure.

[0073] The method of preparing the double-sided battery according to the present embodiment is substantially the same as in Example 1, and the difference is that the square resistance of the positive surface of the positive surface is 120 Ω / ...

Embodiment 3

[0075] The double-sided battery of the present embodiment is substantially the same in the first embodiment, and the difference is mainly in that the number of the aluminum main grid 1 is 15, and the width of the aluminum sub-gate 2 is 200 μm, and adjacent lateral aluminum The spacing of the sub-gate 201 and adjacent longitudinal aluminum sub-gate 202 is 1.5 mm. In this embodiment, the number of segments of the back silver electrode 3 on the same main grid is 14, which has a width of 1.8 mm, a length of 3.5 mm, and the ring type width of the ring aluminum main grid 102 is 0.5mm, and the inner ring width is 1.6. MM, the inner ring length is 4.2mm. The aluminum fine main grill uses 0.8 mm / 0.55 mm / 0.22 mm three-stage bamboo stewardal structure.

[0076] The method of the double-sided battery of the present embodiment, the process operation is substantially the same as in Example 1, and the difference is mainly in that the square resistance of the positive surface of the positive ...

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Abstract

The invention discloses a double-sided battery back electrode and a preparation method and application thereof, and belongs to the technical field of back electrodes. The double-sided battery back electrode comprises an aluminum main grid and an aluminum auxiliary grid, the aluminum main grid is formed by connecting aluminum thin main grids and annular aluminum main grids, the annular aluminum main grids are distributed at intervals in the length direction of the aluminum main grid, and the aluminum thin main grids diverging outwards are arranged at the two ends of each annular aluminum main grid. According to the invention, the structure of the back electrode is optimally designed, and a divergent aluminum main gate structure is adopted, so that the defects of the current back electrode can be effectively overcome, and the quality and reliability of the assembly are ensured while the conversion efficiency of a PERC battery is improved.

Description

Technical field [0001] The present invention belongs to the field of back electrode technology, and more particularly to a double-sided battery back electrode and a preparation method thereof. Background technique [0002] Double-sided solar cells can be produced by only the existing battery and component production lines can be produced, and can increase by 5% -25% of system power generation than single-sided battery assembly products, so that double-sided battery technology is gradually become At present, the mainstream technology of the crystalline silicon cell has been widely promoted. [0003] The design of the back electrode is intertwined with double-sided battery, carrier collection, slurry consumption, component welding and other factors, etc., etc., and compromise. At present, the back electrode structure of the MBB double-sided battery is like figure 1 As shown, the entire back electrode is constituted by a uniform, parallel distribution of the sub-gate and the main ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/068H01L31/18
CPCH01L31/022433H01L31/022441H01L31/0684H01L31/1804Y02E10/547Y02P70/50
Inventor 黄智徐涛张林翟绪锦谢泰宏
Owner TONGWEI SOLAR (JINTANG) CO LTD
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