Battery Cell Tab Gathering Structure for Stable Terminal Connection
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Solution Overview
Problem
Current battery cells have reliability issues due to redundancy and inefficiencies in the conductive parts, leading to increased costs and potential short circuits.
Innovation Solution
The battery cell design includes a conductive part with tab plates that gather to form gathering parts, with projections within the post terminal's contour, reducing length and redundancy, and incorporates accommodating parts to optimize space and electrical connections, enhancing reliability and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conductive part is made longer to ensure electrical connection, then the connection stability is improved, but the cost increases and redundancy causes inverted insertion problems
Solution Approach 1:
The patent changes the spatial arrangement of the conductive part from a linear extension to a three-dimensional configuration where the orthographic projection falls within the post terminal's contour. This dimensional optimization allows the conductive part to achieve stable electrical connection without excessive length, reducing redundancy and preventing inverted insertion while maintaining connection reliability.
2Device complexity
If the conductive part length is reduced to lower cost, then the redundancy is reduced, but the electrical connection stability may be compromised
Solution Approach 1:
The patent optimizes the geometric parameters of the conductive part, specifically controlling its length and spatial orientation so that its orthographic projection in the first direction falls within the post terminal's contour. This parameter optimization ensures the conductive part is sufficiently long to maintain stable electrical connection while being short enough to reduce cost and eliminate redundancy-related issues.
3Reliability
If more space is allocated to the conductive part and post terminal, then the electrical connection is more stable, but the overall battery cell space is reduced
Solution Approach 1:
The patent applies a nesting principle by positioning the orthographic projection of the conductive part within the contour of the post terminal. This nested arrangement allows the conductive part to be spatially integrated with the post terminal structure, concentrating the space occupied by both components and releasing remaining battery cell space for other structures or electrolyte while maintaining stable electrical connection.
Data Source
AI summary
A battery cell comprises: terminals and a battery core assembly; the battery core assembly comprises active substance coated parts and a plurality of tab pieces extending from the active substance coated parts in a first direction; the ends of the plurality of tab pieces close to an active substance coated part close up to form a first closing-up part, and the ends of the plurality of tab pieces away from the active substance coated part close up and connect to each other to form a second closing-up part, the first closing-up part being connected to the second closing-up part and the active substance coated part, and the orthographic projection of the end of the second closing-up part connected to the first closing-up part on a terminal in the first direction being at least partially located in the outer contour range of the terminal.