Battery Cell Insulation Structure for Loose Tab Short-Circuit Prevention
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Solution Overview
Problem
Existing battery cells suffer from poor insulation properties, leading to potential short circuits and safety risks due to loose tabs contacting internal components.
Innovation Solution
Implementing a first insulation member between the tab and a limiting portion of the housing, along with additional insulation members to ensure reliable isolation and reduce the risk of short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no insulation member is provided between the tab and the limiting portion, then the device complexity is reduced, but the reliability deteriorates due to potential short circuits
Solution Approach 1:
An insulation member is introduced as an intermediary component between the tab and the limiting portion of the housing. This mediator prevents direct contact and potential short circuits while maintaining the structural simplicity of the overall battery design. The insulation member is positioned to fill the gap when the tab moves toward the limiting portion during battery swelling or aging.
2Reliability
If the tab is allowed to move freely towards the end cover, then the ease of operation is improved, but the reliability deteriorates due to contact with the limiting portion causing short circuits
Solution Approach 1:
The insulation member serves as a protective intermediary that allows the tab to move freely toward the end cover without causing electrical contact with the limiting portion. This mediator maintains electrical safety while preserving the mechanical flexibility and operational ease of the tab during battery assembly and operation.
Data Source
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AI summary
Embodiments of the present disclosure provide a battery cell, a battery, a power consumption device, and a device and a method for manufacturing a battery cell. The battery cell comprises an electrode assembly, a housing, an end cover, and a first insulation member. The electrode assembly comprises a first tab. The housing is configured to accommodate the electrode assembly, the housing has an opening, and a first limiting portion is formed on an inner circumferential wall of the housing. The end cover is configured to cover the opening, and in a thickness direction of the end cover, the first limiting portion is configured to limit movement of the end cover in a direction towards the electrode assembly. The first insulation member is at least partially provided between the first tab and the first limiting portion, so as to insulate and isolate the first tab from the first limiting portion. The first insulation member insulates and isolates the first tab and the first limiting portion, thus reducing the risk of safety problem caused by short circuit inside the battery cell due to electrical connection formed between the first tab and the first limiting portion caused by contact of the first tab with the first limiting portion as the first tab becomes loose towards the end cover.