Battery and electronic device having the same

By replacing the winding needles with conductive structures, the problems of low utilization of hollow space and complex electrode welding in wound batteries are solved, achieving higher energy density and safety.

CN117039353BActive Publication Date: 2026-07-03NINGDE AMPEREX TECHNOLOGY LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGDE AMPEREX TECHNOLOGY LTD
Filing Date
2020-10-20
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing wound batteries leave a hollow space after the winding needle is pulled out, resulting in low utilization of the internal space of the battery and loss of energy density. In addition, the electrode tab welding process is complicated and occupies additional space.

Method used

By replacing the winding needle with a conductive structure, the conductive structure acts as a tab to bring out the polarity of the electrode, making full use of the hollow space at the beginning of winding and ensuring that the beginning of the electrode is located between the conductive structures during winding. This simplifies the tab welding process and improves space utilization and safety.

Benefits of technology

It improves the utilization rate of the battery's internal space, enhances energy density, reduces the risk of lithium plating on the electrodes, simplifies the electrode tab welding process, and improves battery safety and quality.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN117039353B_ABST
    Figure CN117039353B_ABST
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Abstract

A battery (100) includes a casing (10) and a cell (20) housed within the casing (10). The casing (10) includes an electrically isolated first housing (11) and a second housing (12). The second housing (12) is mounted on the first housing (11). The cell (20) includes a first electrode (21), a second electrode (22), and a separator (23) located between the first electrode (21) and the second electrode (22). The battery (100) also includes a first conductive element (31) and a second conductive element (32) housed within the casing (10) and electrically isolated therefrom, the first conductive element (31) electrically connecting the first electrode (21) and the first housing (11), and the second conductive element (32) electrically connecting the second electrode (22) and the second housing (12). A first conductive element (31) and a second conductive element (32) constitute a conductive structure (30). A first electrode (21), a separator (23), and a second electrode (22) are wound around the conductive structure (30) to form a battery cell (20). The starting end of the first electrode (21) and the starting end of the second electrode (22) are located between the first conductive element (31) and the second conductive element (32). An electronic device (200) including the above-described battery (100) is provided. The above-described battery (100) can improve the internal space utilization and energy density of the battery (100).
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