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Preparation method of slice battery and laser equipment

A laser equipment and slicing technology, applied in the field of solar cells, can solve the problems of laser heat loss, efficiency loss, passivation defect loss at the cut surface, etc., so as to reduce the loss of total efficiency, reduce equipment occupation, and strengthen the passivation effect. Effect

Active Publication Date: 2021-08-13
苏州联诺太阳能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Half-slice heterojunction cells prepared by this process have an efficiency loss of about 0.3%.
For conventional cutting methods, the main sources of efficiency loss are laser heat loss, split loss, and loss of passivation defects at the cut surface, etc.

Method used

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  • Preparation method of slice battery and laser equipment
  • Preparation method of slice battery and laser equipment
  • Preparation method of slice battery and laser equipment

Examples

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preparation example Construction

[0036] It can be understood that the preparation method of sliced ​​cells generally includes multiple steps, and the scribing step and the light injection step are two of them. The preparation methods of different types of sliced ​​cells are different. The preparation process of PERC sliced ​​cells is It can include: texture cleaning, high temperature diffusion, etching and polishing, aluminum oxide film deposition on the back, silicon nitride film deposition on the front, laser grooving on the back, printing and sintering, light injection / electrical injection treatment, and scribing treatment. Taking the heterojunction battery as an example, its preparation method can include texture cleaning, front and back amorphous silicon film deposition, front and back TCO film deposition, printing and curing, light injection treatment and scribing treatment. However, in the embodiments of the present disclosure, only the light injection process and the scribing process are focused on, an...

Embodiment 1

[0050] see figure 2 For the embodiment of the present disclosure, a method for preparing a sliced ​​battery is provided, the preparation method includes texture cleaning, front and back amorphous silicon film deposition, front and back TCO film deposition, printing and curing, dicing treatment and light injection treatment, Wherein, the light injection processing step and the scribing processing step are completed in different chambers of the same laser equipment.

[0051] Different chambers of the laser equipment respectively have a first laser light source and a second laser light source, and the first laser light source is used for scribing in the scribing process step. In the light injection step, the second laser light source is used to perform light injection treatment, and the scribing treatment step is after the light injection step. Both the first laser light source and the second laser light source are infrared laser light sources. The number of slices in this scr...

Embodiment 2

[0057] The difference between the second embodiment of the present disclosure and the first embodiment is that in the second embodiment, the dicing processing step is before the light injection processing step. Correspondingly, in the corresponding laser equipment provided in this embodiment, the laser scribing process is first performed on the loaded battery sheet, and then the laser light injection process is performed.

[0058] Compared with the first embodiment, the second embodiment can passivate and strengthen the repair of the defect during the laser light injection treatment.

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Abstract

The embodiment of the invention provides a preparation method of a slice battery and laser equipment, which belong to the technical field of solar batteries. The preparation method of the slice battery comprises a scribing processing step and a light injection processing step. The light injection processing step and the scribing processing step are completed in different cavities or the same cavity of the same laser device. Scribing treatment and light injection treatment are carried out on the battery piece by using the same laser equipment, so that the battery piece is prevented from being moved to different equipment platforms when two different treatments are carried out on the battery piece, the preparation efficiency of the slice battery is improved, the occupied area of the equipment can be reduced, the preparation sequence of scribing first and then light injection is adopted,the surface of the battery slice after scribing treatment is provided with the tangent plane. Compared with a preparation sequence of first light injection and then scribing in the prior art, the tangent plane has a passivation effect or the passivation effect of the tangent plane is enhanced while light injection is completed, and the loss of the total efficiency of the slice battery is reduced.

Description

technical field [0001] The present disclosure relates to the technical field of solar cells, in particular to a method for preparing sliced ​​cells and a laser device. Background technique [0002] In recent years, with the continuous breakthrough of the bottleneck of solar cell technology, the development of high-efficiency cells and components has attracted more and more attention. With the promotion of large-size silicon wafers, the technology of sliced ​​cell modules with low internal friction (such as half-cell, patchwork, shingled, etc.) is bound to become the mainstream trend of photovoltaic modules in the future. [0003] For slicing technology, there is a technical difficulty in the industry that the loss of slicing efficiency is too large. Taking heterojunction cells as an example, the current conventional half-slice heterojunction cell preparation process in the industry is: texture cleaning, front and back amorphous silicon film deposition, front and back TCO fi...

Claims

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Application Information

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IPC IPC(8): H01L31/18B23K26/38B23K26/70B23K26/00
CPCH01L31/18H01L31/186H01L31/1864H01L31/1868B23K26/38B23K26/702B23K26/00Y02P70/50Y02E10/50
Inventor 不公告发明人
Owner 苏州联诺太阳能科技有限公司
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