Battery cell and battery pack

By setting guide ribs on the insulating parts to form a flow channel, the problem of low strength of the plastic through-hole structure under the power battery is solved, the liquid injection efficiency is improved and the short circuit risk is reduced.

WO2026144837A1PCT designated stage Publication Date: 2026-07-09SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
Filing Date
2025-12-05
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

The area around the lower plastic through-hole of the power battery has low structural strength, is prone to deformation, and has a high risk of short circuit between the electrode assembly and the battery top cover.

Method used

At least two flow-guiding ribs are provided on the insulating component. The ribs are distributed at intervals along the outer periphery of the second injection hole and are recessed in the direction away from the injection hole to form a flow-guiding channel, which enhances the structural strength and guides the electrolyte injection through the flow-guiding channel, thereby reducing the exposed area of ​​the injection hole and reducing the risk of short circuit.

Benefits of technology

It improves the efficiency of liquid injection, reduces the risk of deformation of insulating components, and reduces the possibility of short circuits in electrode assemblies and top cover plates.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN2025140557_09072026_PF_FP_ABST
    Figure CN2025140557_09072026_PF_FP_ABST
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Abstract

The present application relates to the technical field of batteries, and discloses a battery cell and a battery pack. An insulating member of said battery cell has at least two protruding flow guide ribs protruding from the side facing away from a top cover plate. The protruding flow guide ribs are spaced apart along the outer periphery of a second liquid injection hole. The protruding flow guide ribs can improve the structural strength of the area around the second liquid injection hole and reduce the risk of deformation of the insulating member. Furthermore, in the radial direction of the second liquid injection hole, the protruding flow guide ribs are recessed in a direction away from the second liquid injection hole. A flow guide channel in communication with the second liquid injection hole is formed between each two adjacent protruding flow guide ribs. The flow guide channel can have the effect of guiding an electrolyte during injection of the electrolyte from the second liquid injection hole, thereby ensuring liquid injection efficiency. In addition, the protruding guide ribs are spaced apart from the second injection hole in the radial direction of the second liquid injection hole, which can reduce the risk of contact between an electrode assembly and the top cover plate, that is, the risk of a short circuit between the electrode assembly and the top cover plate can be reduced.
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