Battery monomer and electric equipment

By designing a battery cell that includes a specific metal sheet and proportional relationship, the problem of extreme ear tearing during battery welding is solved, and the reliability and quality of the battery manufacturing process is improved.

CN119650978AActive Publication Date: 2025-03-18CALB GROUP CO LTD
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Patent Information

Application Number
CN202411779243.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-03-18
Estimated Expiration
2044-12-05

AI Technical Summary

Technical Problem

During battery welding, the extreme ears are prone to convex hulls and tear, resulting in a reduced reliability of the battery manufacturing process.

Method used

A battery cell is designed, including a housing, electrode terminals, electrode assembly, ears and metal sheets. The metal sheet includes a body part and a protruding part, which protrude towards the electrode terminal and is fixed to the electrode head and the electrode terminal during welding, satisfying the specific proportional relationship between the soldering and the bottom wall distance, the metal sheet hardness and the extreme ear thickness.

Benefits of technology

It effectively reduces the chance of tearing of the electrode ear, improves the stability of the connection between the electrode ear and the electrode terminal, and improves the quality of battery cell manufacturing.

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Abstract

The invention relates to the technical field of batteries, and discloses a single battery and electric equipment.The single battery comprises a shell, an electrode terminal, an electrode assembly, a tab and a metal sheet, the shell is provided with a first wall, the electrode terminal is arranged on the first wall, the electrode assembly is arranged in the shell, the tab is arranged in the shell, and the tab is provided with a first end and a second end; the first end is connected with the electrode assembly, the second end is arranged between the metal sheet and the electrode terminal, the metal sheet, the second end and the electrode terminal are welded and fixed, the metal sheet comprises a body part and a protruding part, the protruding part protrudes towards the electrode terminal relative to the body part, and the protruding part comprises a bottom wall and a peripheral wall; the peripheral wall surrounds the peripheral edge of the bottom wall and is connected with the bottom wall and the body part, a welding mark is arranged on the bottom wall, the minimum distance between the welding mark and the peripheral edge of the bottom wall is D, the hardness of the metal sheet is A, the thickness of the tab is D, and D * W / A is larger than or equal to 0.0015 mm < 2 > / HB and smaller than or equal to 0.3 mm < 2 > / HB. The technical problem of tab tearing in battery welding is solved.
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