battery

By setting an injection hole on the battery casing and controlling its distance from the tab, the problems of injection effect and battery safety performance are solved, achieving efficient electrolyte injection and tab protection, and improving battery performance.

CN115051122BActive Publication Date: 2026-05-01CALB GROUP CO LTD
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Patent Information

Application Number
CN202210753738.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-28
Publication Date
2026-05-01
Estimated Expiration
2042-06-28

AI Technical Summary

Technical Problem

The position of the electrolyte injection hole on the battery casing and its relationship with the tabs affect the electrolyte injection effect and battery safety performance. Existing technologies cannot balance electrolyte injection efficiency with tab protection.

Method used

An electrolyte injection hole is provided on the battery casing, located on the side of the cell body near the tab. The minimum vertical distance between the injection hole and the tab is controlled to be 5≤b/a≤20. This ensures that the electrolyte does not directly impact the tab during injection, while also ensuring the width of the tab to improve battery performance.

Benefits of technology

By properly setting the position and distance of the electrolyte injection holes, the impact of the electrolyte on the tabs can be avoided, ensuring the cell's overcurrent capacity and the battery's charge and discharge rate, thereby improving the overall performance of the battery.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

This invention relates to the field of battery technology and proposes a battery comprising: a battery casing with an electrolyte injection hole; and a battery cell disposed within the battery casing, the battery cell including a cell body and a tab, the tab extending from the side of the cell body, the electrolyte injection hole located on the side of the cell body near the tab, and the electrolyte injection hole being disposed on the surface of the battery casing opposite the large surface of the tab; wherein, in a direction perpendicular to the extension direction of the cell body and the tab, the minimum vertical distance between the electrolyte injection hole and the tab is 'a', the width of the cell body is 'b', and 5 ≤ b / a ≤ 20, which not only avoids the impact of electrolyte injection on the tab but also ensures the width of the tab, thereby ensuring the current carrying capacity of the cell and the charge / discharge rate of the battery, thus improving the battery's performance.
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