Battery winding frame

By using a battery winding frame with main and auxiliary roller frames in lithium-ion cell production, the problem of loosening at the winding end of the cell was solved, and the electrode sheets were tightly wound, improving the safety and winding quality of the cell.

CN224053177UActive Publication Date: 2026-03-27HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-05
Publication Date
2026-03-27

AI Technical Summary

Technical Problem

During the production of lithium-ion cells, the ends of the cell winding may become loose, resulting in uneven or loose electrode sheets, which affects the safety performance of the cell.

Method used

A battery winding frame is adopted, including a main roller frame and a secondary roller frame. The secondary roller body guides the electrode sheet to ensure that the electrode sheet is wound tightly. The main roller body is close to the secondary roller body to clamp the tail end of the electrode sheet. Stable clamping is achieved by the cooperation of clamping plates and guide rods to reduce electrode sheet loosening.

Benefits of technology

It effectively shortens the unwinding length at the tail of the electrode during winding, improves the safety of cell winding, reduces abnormal lithium plating on the electrode, and improves winding quality.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224053177U_ABST
    Figure CN224053177U_ABST
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Abstract

The utility model provides a battery winding frame, which relates to the technical field of battery winding, and comprises a main roller frame and an auxiliary roller frame, the rotating axis of the auxiliary roller frame and the rotating axis of the main roller frame coincide and are connected, each support arm of the main roller frame is rotatably provided with a shaft seat, one side of each shaft seat is rotatably provided with a main roller body capable of winding a battery cell, and the other side of each shaft seat is provided with a rotating shaft. The auxiliary roller frames are rotationally provided with auxiliary roller bodies with the same number as the supporting arms, and the shaft seats can rotate relative to the main roller frames so that the main roller frames can be close to the corresponding auxiliary roller bodies. The main roller frame can be slowly close to the auxiliary roller frame at the end of winding of the pole piece, the emptying length of the tail of the pole piece during winding can be greatly shortened, the length of the pole piece when the pole piece is not clamped can be shortened, the safety during winding of a battery cell is further improved, and the phenomenon that lithium is separated out abnormally during winding of the pole piece is reduced.
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