Battery Cell Isolation Groove for Tab Protrusion Clearance
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Solution Overview
Problem
Conventional battery cells experience performance degradation due to interference between the cap assembly and protrusions, leading to issues like tab insertion and short circuits, which are not adequately addressed by increasing the current-flowing area between the tab and electrode plate.
Innovation Solution
Incorporating a clearance groove on the isolation member to accommodate protrusions, improving the cooperation between the isolation member and tab, and enhancing the limiting effect on protrusions to prevent misalignment and short circuits, while maintaining compatibility with various protrusion sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the current-flowing area between the tab and electrode plate is increased to improve battery power, then the power of the battery is improved, but the interference between the cap assembly and protrusions causes tab insertion issues and short circuits
Solution Approach 1:
The patent extracts the protrusion from the tab structure and provides a dedicated clearance groove in the isolation member to accommodate it. This separates the protrusion (which increases current-flowing area) from the tab body, allowing the protrusion to be positioned without interfering with the cap assembly while still achieving the goal of increased power.
Solution Approach 2:
The clearance groove acts as an intermediary space between the protrusion and the cap assembly. This mediator allows the protrusion to exist in a position that increases current-flowing area while preventing direct contact or interference with the cap assembly, thus resolving the contradiction between power improvement and reliability.
2Power
If the protrusion is added to increase current-flowing area, then the power is improved, but the protrusion interferes with the cap assembly causing short circuits
Solution Approach 1:
The protrusion is extracted from the traditional tab configuration and given its own dedicated space in the clearance groove. This extraction allows the protrusion to function for increasing current-flowing area without being constrained by the cap assembly geometry, thereby eliminating the short circuit risk while maintaining power improvement.
Solution Approach 2:
The patent converts the potential harmful interference between the protrusion and cap assembly into a beneficial arrangement by designing the clearance groove to accommodate the protrusion. The space that could have caused short circuits is instead used to position the protrusion optimally for increasing current-flowing area, turning a harmful factor into a benefit.
3Adaptability or versatility
If the isolation member is made to accommodate larger protrusions, then compatibility with various protrusion sizes is improved, but the structural complexity of the isolation member increases
Solution Approach 1:
The clearance groove is designed with adjustable parameters (depth, width, position) that can be modified to accommodate different protrusion sizes. By changing these geometric parameters rather than redesigning the entire isolation member structure, the patent achieves versatility while maintaining structural simplicity.
Solution Approach 2:
The clearance groove serves multiple functions: it accommodates protrusions of various sizes, maintains isolation between the cap assembly and electrode assembly, and provides a consistent structural feature that simplifies manufacturing. This multi-functionality achieves adaptability without proportionally increasing structural complexity.
Data Source
AI summary
A battery cell, a battery and an electricity consuming apparatus are provided. The battery cell includes a cap assembly and an electrode assembly, the cap assembly includes a cap plate and an isolation member, and the isolation member is disposed on one side of the cap plate; the electrode assembly is disposed on a side of the isolation member facing away from the cap plate, the electrode assembly includes an electrode body and tabs protruding from the electrode body, and a protrusion connected with the electrode body is connected on a peripheral side of at least one of the tabs; wherein a clearance groove is provided on a surface of the isolation member facing away from the cap plate, and is configured to accommodate at least a portion of the protrusion.