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Heterojunction battery assembly with approximately zero battery piece spacing, and preparation method thereof

A technology of heterojunction cells and cells, applied in electrical components, circuits, photovoltaic power generation, etc., can solve the problems of product load reliability risk, process cracking and other problems, so as to improve the safety performance of components, reduce the cost of packaging materials, and reduce the cost of packaging materials. Effects of Power Loss and Risk

Pending Publication Date: 2021-11-26
JIANGYIN AKCOME SCI & TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings, provide a heterojunction battery module with approximately zero cell spacing and its preparation method, and solve the hidden cracks in the process and the risk of product load reliability caused by the cross-welding method of the front and back of the ribbon.

Method used

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  • Heterojunction battery assembly with approximately zero battery piece spacing, and preparation method thereof
  • Heterojunction battery assembly with approximately zero battery piece spacing, and preparation method thereof
  • Heterojunction battery assembly with approximately zero battery piece spacing, and preparation method thereof

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Embodiment 1

[0039] see Figure 3~4 and Figure 7 , the present invention relates to a heterojunction battery assembly with approximately zero cell spacing, which includes a battery string array with six rows and two columns consisting of six battery strings on the left side and six battery strings on the right side, and each battery string is An array of ten rows and twelve columns of cells, each row of cells includes alternately arranged positive junction cells 1 and back junction cells 2, two adjacent back junction cells 2 and positive junction cells 1 are provided with front side welding strips 3. Two adjacent positive-junction cells 1 and back-junction cells 2 are provided with back-side ribbons 4 , and the ends of the back-side ribbons 4 correspond to the centers of the upper front-side ribbons 3 .

[0040] The two ends of the front soldering ribbon 3 reserve a length of 5-20 mm as a single string of positive and negative output.

[0041] The six battery strings on the left side an...

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Abstract

The invention relates to a heterojunction battery assembly with approximately zero battery piece spacing, and a preparation method thereof. The heterojunction battery assembly comprises a battery string array, each battery string is a battery piece array, each row of battery pieces comprises front junction battery pieces and back junction battery pieces which are alternately arranged, front solder strips are arranged on the front surfaces of the two adjacent front junction battery pieces and back junction battery pieces, and back welding strips are arranged on the back surfaces of the two adjacent front-junction battery pieces and back-junction battery pieces. According to the invention, the welding strip and the side surfaces of the battery pieces are not contacted and have no stress, the hidden crack problem caused by the stress of the welding strip does not exist, and the distance between the battery pieces can be reduced from 1-4 mm to 0-0.5 mm, so that the effect of approaching zero piece distance is achieved, the assembly area is reduced to the greatest extent, and the packaging material cost is reduced.

Description

technical field [0001] The invention relates to the technical field of high-efficiency photovoltaic cells, in particular to a heterojunction cell assembly with approximately zero cell spacing and a preparation method thereof. Background technique [0002] With the widespread application of solar energy, the solar photovoltaic panel industry is also booming. The conventional component manufacturing process uses ribbons to connect and weld the positive and negative electrodes of the cells into a string, and then arrange and weld them into modules in a certain arrangement. Usually, the positive and negative electrodes of two adjacent cells are staggered by soldering ribbons to achieve positive and negative poles. purpose of the connection. The reason why the existing technology adopts the staggered welding of the front and the back of the ribbon is that the current mainstream battery technology structures in the industry such as PERC, HIT, and TOPCON are all single-sided and u...

Claims

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Application Information

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IPC IPC(8): H01L31/05H01L31/18H02S40/34
CPCH01L31/0504H01L31/1804H01L31/1876H02S40/34Y02E10/547Y02P70/50
Inventor 刘云磊欧衍聪戴珍林
Owner JIANGYIN AKCOME SCI & TECH
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