Winding electrode group heat press setting device and heat press setting method

By designing an upper pressure plate structure with bosses and chamfered edges, the problems of powder cracking and material loss at the C-corner during the hot pressing process of lithium-ion wound cells were solved, achieving uniform stress and shaping effect of the cells and adapting to the hot pressing requirements of cells of different sizes.

CN122136419APending Publication Date: 2026-06-02LISHEN (QINGDAO) NEW ENERGY CO LTD
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LISHEN (QINGDAO) NEW ENERGY CO LTD
Filing Date
2026-02-14
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

During the hot pressing process of lithium-ion wound cells, the C-corner of the electrode core is prone to cracking and material loss due to uneven structure and stress concentration. Existing hot pressing and shaping devices are difficult to solve this problem effectively, especially in high-energy-density and large-size cells.

Method used

A hot-pressing shaping device for winding battery cell electrode groups is designed. It adopts a structure with a boss in the middle of the upper pressure plate. The boss avoids the C-corner area of ​​the battery cell. Combined with the slope and chamfer design, the thickness difference between the C-corner and the large surface of the battery cell is controlled to achieve uniform force distribution.

Benefits of technology

It effectively alleviates the problems of powder cracking and material loss at the C-corner after hot pressing of the battery cell, while ensuring the overall shaping effect of the battery cell, avoiding dents and thickness differences, and adapting to the hot pressing requirements of battery cells of different sizes.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122136419A_ABST
    Figure CN122136419A_ABST
Patent Text Reader

Abstract

This invention discloses a hot-pressing and shaping device and method for wound battery cell electrode assemblies. The hot-pressing and shaping device for wound battery cell electrode assemblies includes an upper pressure plate and a lower pressure plate arranged vertically. The upper pressure plate is driven by a drive module to move vertically and cooperates with the lower pressure plate to hot-press the wound battery cell electrode assembly on the surface of the lower pressure plate. A boss is formed in the middle of the lower surface of the upper pressure plate to prevent air from entering the C-corner area of ​​the battery cell electrode assembly during hot pressing. This invention, through the upper pressure plate with the boss in the middle, achieves air leakage in the C-corner area of ​​the battery cell during hot pressing, reducing the stress on the C-corner area while ensuring the overall hot pressing effect of the battery cell. Furthermore, the thickness difference between the C-corner area and the larger surface area of ​​the battery cell can be controlled by controlling the size of the boss, ensuring that the overall thickness difference of the battery cell does not exceed the product specification value.
Need to check novelty before this filing date? Find Prior Art