Light injection device

By designing the temperature and light control in the light injection device, the hydrogen atoms in the cell are activated and combined with the composite center defects, the conversion efficiency attenuation problem caused by the introduction of hydrogen atoms is solved, and the efficient stability and conversion efficiency of the cell are improved.

CN223286144UActive Publication Date: 2025-08-29HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Patent Information

Application Number
CN202422233920.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-11
Publication Date
2025-08-29
Estimated Expiration
2034-09-11

AI Technical Summary

Technical Problem

During the oxide layer passivation process and coating process of the existing light injection device, the recombination caused by the introduction of hydrogen atoms will cause the conversion efficiency attenuation and stability of the TOPCon battery to be reduced.

Method used

Design a light injection device, including a conveying component, a heating component, a lighting component and a cooling component, control temperature and light power, activate hydrogen atoms in the cell, ionize and combine with the composite center defects, form a non-compound center, improve the passivation effect, and keep the structure dense by rapidly cooling to prevent defect reactivate.

Benefits of technology

It improves the photoelectric conversion efficiency and stability of the battery cell, reduces photoinduced attenuation and current attenuation, and improves the conversion efficiency and stability of the battery cell.

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Abstract

The utility model relates to light injection equipment which is used for carrying out light injection on a battery piece and comprises a conveying assembly, a heating assembly, an illumination assembly and a cooling assembly, the conveying assembly is used for conveying the battery piece so that the battery piece can sequentially penetrate through the heating assembly, the illumination assembly and the cooling assembly, and the heating assembly is used for heating the battery piece; the illumination assembly comprises an illumination module and a first heating module, the illumination module is arranged above the conveying assembly to irradiate the battery pieces from the upper portion, and the first heating module is arranged below the conveying assembly to be used for heating the battery pieces on the conveying assembly; and the cooling assembly is used for cooling the battery piece penetrating through the illumination assembly. Hydrogen atoms in the battery piece are activated through the heating assembly, and then the hydrogen atoms are ionized through the illumination assembly, so that a non-composite center is formed; and finally, the rate of re-activation of the passivated defects is reduced through the cooling assembly, the passivation effect is improved, the defects in the battery piece reach a stable state, and meanwhile the conversion efficiency of the battery piece is improved.
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