Pouch Cell Tab Glue Layout for Space-Saving Bent Tabs
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Solution Overview
Problem
Conventional pouch cell batteries waste space due to tab glue occupation in the length direction after bending, hindering battery capacity improvement.
Innovation Solution
The tab glue is not applied on the inner or outer surfaces of the bent tab portion, allowing for reduced space occupation and easier bending, thereby enhancing assembly convenience and battery capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tab glue is applied on the bent tab portion to prevent short circuits, then reliability is improved, but space occupation in the length direction increases causing battery capacity deterioration
Solution Approach 1:
The patent applies tab glue only to specific locations where short circuit prevention is needed (fixed tab portion and outer surface of bent tab portion) while leaving other areas (inner side surface of bent tab portion) without glue to minimize space occupation. This localized application strategy resolves the contradiction between reliability and space efficiency.
2Reliability
If tab glue is applied on the bent tab portion to ensure electrical connection, then reliability is improved, but assembly convenience deteriorates due to difficulty in bending
Solution Approach 1:
The patent applies tab glue only to the fixed tab portion and outer surface of the bent tab portion, leaving the inner side surface of the bent tab portion without glue. This allows the bent tab portion to be easily bent during assembly while still maintaining electrical connection reliability through glue application on other surfaces.
3Reliability
If tab glue is applied on the entire tab surface to prevent contact with other components, then reliability is improved, but space waste in the length direction increases
Solution Approach 1:
The patent applies tab glue selectively to the fixed tab portion and outer surface of the bent tab portion, while leaving the inner side surface of the bent tab portion without glue. This localized approach prevents contact with other components where needed while minimizing space occupation in the length direction.
Data Source
AI summary
This application provides a battery cell assembly, a battery, and an electronic device. The battery cell assembly includes a battery cell and a first tab glue. The battery cell includes a battery cell body and a tab. The tab extends relative to the battery cell body. The tab includes a fixed tab portion and a bent tab portion. The fixed tab portion is fastened to the battery cell body, and the bent tab portion is fastened to an end that is of the fixed tab portion and that is away from the battery cell body. The first tab glue is provided on an inner side surface of the fixed tab portion, and an inner side surface of the bent tab portion is exposed relative to the first tab glue.