Cylindrical laminated battery, battery pack and power utilization device

By incorporating a positioning rod in the core package of the cylindrical lithium-ion battery and manufacturing it using a lamination process, the problem of insufficient pole sheet offset and contact area during use is solved, and the safety performance and energy density of the battery are improved.

CN222673155UActive Publication Date: 2025-03-25安徽得壹能源科技有限公司
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Patent Information

Application Number
CN202421191706.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-28
Publication Date
2025-03-25
Estimated Expiration
2034-05-28

AI Technical Summary

Technical Problem

During use, existing cylindrical lithium-ion batteries are prone to deviating the pole sheet due to collision, causing safety hazards. The contact area between the pole sheet and the electrolyte is insufficient, affecting the battery performance and energy density.

Method used

A cylindrical laminated battery is designed, which is made of laminated technology. The core package is built-in positioning rod. The positioning rod is inserted into the positioning hole of the pole sheet and is wrapped by an isolation film to ensure the stability of the gap between the pole sheets.

Benefits of technology

Through the lamination process and the design of the positioning rod, the contact area between the electrode sheet and the electrolyte is improved, the stability of the gap between the electrode sheet is ensured, and the safety performance and life of the battery are enhanced.

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Abstract

The utility model discloses a cylindrical laminated battery, a battery pack and an electric device, and belongs to the field of laminated batteries. The cylindrical laminated battery comprises a shell, a core bag arranged in the shell and a top cover located at the top of the shell, and is characterized by further comprising a positioning rod, the positioning rod is vertically arranged in the core bag, and the two ends of the positioning rod are not in contact with the top cover and the shell; the core package comprises a positive pole piece, an isolating membrane and a negative pole piece which are stacked in a staggered manner, positioning holes are formed in the positive pole piece and the negative pole piece, and the positioning rods are arranged in the positioning holes and are wrapped by the isolating membrane. According to the cylindrical laminated battery prepared by the lamination process, the contact area of the pole piece and electrolyte is effectively increased, the performance and the safety of the battery are improved, and the positioning rod is inserted into the positioning hole, so that the pole piece structure in the battery is kept stable, the deviation of the pole piece is avoided, and the yield of the battery is improved.
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