Battery cell

By welding the conductive components to the battery cell assembly using a separate design, the welding problem caused by the difference in materials between the busbar and the outer casing was solved, improving the weld quality and conductivity, extending battery life, and simplifying the production process.

WO2026129811A1PCT designated stage Publication Date: 2026-06-25HUIZHOU EVE POWER CO LTD +1
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HUIZHOU EVE POWER CO LTD
Filing Date
2025-10-09
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

The difference in melting point and fluidity between the busbar and the casing leads to poor weld penetration during welding, affecting the battery's electrical performance and lifespan.

Method used

The first and second conductive components are designed separately. The second conductive component passes through the conductive hole of the first conductive component and is welded to the battery cell assembly. The material selection is flexible to optimize the welding quality. For example, the busbar and the battery cell assembly are welded to the same material, and the outer shell is made of aluminum alloy to ensure strength.

Benefits of technology

It improves weld quality and conductivity, simplifies the production process, extends the lifespan of individual cells, and optimizes battery performance.

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  • Figure CN2025126571_25062026_PF_FP_ABST
    Figure CN2025126571_25062026_PF_FP_ABST
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Abstract

The present application discloses a battery cell. The battery cell comprises a first conductive member, second conductive members, and a cell core assembly. Specifically, the first conductive member is provided with electrical conduction holes, and the electrical conduction holes pass through the first conductive member in the thickness direction of the first conductive member; the second conductive members pass through the electrical conduction holes, and the second conductive members are fixed and electrically connected to the first conductive member; and the cell core assembly is welded and connected to the second conductive members.
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