Multi-Cell Tab Cutting Apparatus for EV Battery Modules
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Solution Overview
Problem
Conventional tab cutting methods for electric vehicle batteries are inefficient, as they allow only single tab cutting at a time, leading to excessive working time and tolerance accumulation, resulting in electrical disconnections and quality degradation in battery modules.
Innovation Solution
A multi-cell tab cutting apparatus and method that fixes multiple tabs using cell tab fixers and cuts them simultaneously with a cutting blade or cutting member having multiple recesses, allowing for simultaneous or sequential cutting of tabs on both sides of stacked cells, minimizing motion and tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If single tab cutting is performed at a time, then cutting precision can be maintained, but working time is excessively required and productivity is low
Solution Approach 1:
The patent merges multiple single-tab cutting operations into a single multi-tab cutting operation by stacking multiple cells and cutting all tabs simultaneously through one driving motion, thereby improving productivity while maintaining precision through fixed positioning
2Device complexity
If single tab cutting is performed sequentially, then device complexity remains simple, but tolerance accumulates causing electrical disconnection
Solution Approach 1:
Multiple cells are stacked and cut simultaneously in one operation, preventing tolerance accumulation that would occur with sequential cutting, thereby ensuring reliable electrical connections without significantly increasing device complexity
Solution Approach 2:
Cells are pre-stacked and positioned before cutting, ensuring proper alignment and minimizing tolerance before the cutting operation begins, which maintains reliability while enabling simultaneous cutting
3Productivity
If multiple tabs are cut simultaneously through once driving, then productivity improves and tolerance is minimized, but device complexity increases
Solution Approach 1:
The apparatus combines multiple cells, fixers, and cutting blades into an integrated system that performs simultaneous cutting, achieving high productivity while managing complexity through coordinated design of components working together
4Manufacturing precision
If tabs are fixed with cell tab fixer, then motion of tabs is minimized improving precision, but device complexity increases
Solution Approach 1:
Tabs are fixed to the cell tab fixer before the cutting operation, establishing precise positioning in advance, which minimizes motion during cutting and improves precision without requiring complex real-time control mechanisms
Data Source
AI summary
Disclosed herein are a multi-cell tab cutting apparatus for a plurality of cells, which have a plurality of tabs formed at one side, and a method therefor. The multi-cell tab cutting apparatus includes a base frame, a cell tab fixer connected to the base frame and configured to fix and support the plurality of tabs, and a cutter positioned at the base frame and configured to cut the plurality of tabs through driving.