A battery cell structure and manufacturing process

By using a rotary stacking process to form a glue-like frame structure in solid-state batteries, the problems of short circuits and edge collapse of positive and negative electrodes during isostatic pressing are solved, achieving stable and efficient cell fabrication, which is suitable for large-scale mass production.

CN121238032BActive Publication Date: 2026-06-30CHONGQING CHANGAN AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING CHANGAN AUTOMOBILE CO LTD
Filing Date
2025-12-03
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The positive and negative electrode sheets of existing solid-state batteries are prone to short circuits and edge collapse during isostatic pressing, making it difficult to achieve large-scale mass production with existing processes.

Method used

By employing a rotary lamination process, an extended region is formed through the negative electrode coating layer and the positive electrode coating layer, creating a glue-like frame structure, which reduces positioning deviation and avoids short circuits and collapse.

Benefits of technology

It achieves stable and efficient cell structure fabrication, adapts to the needs of large-scale mass production, avoids electrode misalignment and short circuits, and improves the stability and safety of the cell.

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Abstract

This application relates to the field of all-solid-state battery fabrication technology, specifically to a cell structure and manufacturing process. This application provides a cell structure that is assembled via a rotary stacking method, wherein the negative electrode coating layer and the positive electrode coating layer together form an extended region, which can adapt to the stacking positioning requirements and reduce the impact of positioning deviations. The electrode and its own edge coating layer form a frame-like structure, providing protection in the extended region and preventing edge short circuits and collapse problems.
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