Battery cell and battery pack

By setting grooves and through holes on the terminals, the tab bundle can be directly welded to the terminals, solving the problem of space occupation by the adapter piece, improving the energy density and charge/discharge performance of the battery cell, and enhancing the structural compactness and electrical connection stability.

CN224481163UActive Publication Date: 2026-07-10SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
Filing Date
2025-06-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing battery cells, the adapter plate occupies internal space, affects energy density, and may lead to insufficient overcurrent, inadequate charge and discharge performance, and insufficient structural compactness.

Method used

By setting grooves and through holes on the pole, the electrode ear bundle can be directly welded to the pole, eliminating the need for an adapter plate, increasing the current flow area and reducing the radial dimension of the pole, and using sealing and insulating components to improve the stability and sealing of the electrical connection.

Benefits of technology

It improves the energy density and charge/discharge performance of individual battery cells, enhances structural compactness, reduces short-circuit risk, and improves the overall performance of individual battery cells.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224481163U_ABST
    Figure CN224481163U_ABST
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Abstract

The application provides a battery monomer and a battery pack, and relates to the technical field of batteries. The battery monomer comprises a shell, a cover connected with the shell, an electrode assembly arranged in the shell, and a pole column penetrating through the cover and provided with a groove. The electrode assembly comprises an electrode body and a tab bundle, the tab bundle comprises a first tab part and a second tab part connected with each other, the first tab part is connected with the electrode body and abuts against the pole column, the notch of the groove is located on the side of the pole column away from the electrode body, a through hole communicating with the groove is arranged on the groove bottom, the side of the second tab part away from the first tab part is accommodated in the through hole, the outer circumferential side of the second tab part is welded with the hole wall of the through hole to form a first welding seam, and the first welding seam is located on the side of the groove bottom away from the electrode body. The battery monomer provided by the application is convenient for directly connecting the tab bundle with the pole column through the through hole and the groove, so that the use of an adapter piece can be saved, and the energy density of the battery monomer is improved.
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