Novel TOPCon battery preparation process and device
By combining chain etching and atomic layer deposition with TMAH+IPA solution etching and polishing, the problems of uneven cut surfaces and thermal damage after laser scribing of TOPCon cells have been solved, thereby improving the electrical performance and efficiency of the cells.
CN122054737APending Publication Date: 2026-05-15ANHUI XUHE NEW ENERGY TECH CO LTD
0 Cites 0 Cited by
Patent Information
- Application Number
- CN202610171889.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-06
- Publication Date
- 2026-05-15
AI Technical Summary
Technical Problem
Existing TOPCon batteries, after laser scribing, have uneven cut surfaces and suffer thermal damage, affecting battery quality and efficiency.
Method used
The cut surface is polished using chain etching alkaline washing and atomic layer deposition technology. TMAH+IPA solution and HF solution are used for etching and polishing. Combined with the roller drive and rotation mechanism of the polishing device, highly selective etching of the cut surface is achieved.
Benefits of technology
It improves the electrical performance of the battery cells, reduces thermal damage, and enhances the flatness and efficiency of the battery.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a novel TOPCon battery preparation process and device, and relates to the technical field of battery processing, and the novel TOPCon battery preparation process comprises the following steps: S1, preparing a sheet; s2, scribing: segmenting the whole cell by using laser; s3, side face polishing is conducted, specifically, chain type etching and alkali washing are conducted on the cutting face, and the cutting face is corroded at the temperature of 30-60 DEG C through 10-30% of TMAH and 5-20% of IPA aqueous solution; s4, edge passivation is conducted, specifically, an aluminum oxide passivation film of 20-50 nm is deposited in an atomic layer deposition mode, and annealing is conducted for 30-60 min at the temperature of 250-300 DEG C; and S5, IV testing: testing the appearance, IV and EL performance of the battery piece, and then grading. Preferably, the flaking process comprises the steps of texturing and boron diffusion. According to the invention, a battery panel is driven to move in a manner of carrying liquid through a roller, and silicon, silicon nitride and silicon oxide on a cut surface of the battery can be corroded and polished by using a TMAH + IPA solution and an HF solution.
Need to check novelty before this filing date? Find Prior Art