Battery Top Cover Multi-Pole Layout for Thin-Cell Overcurrent
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Solution Overview
Problem
Batteries with small cell thicknesses have weak overcurrent capabilities due to small pole sizes and areas of connection, affecting their working performance.
Innovation Solution
A top cover for batteries featuring multiple pole bodies connected to a single pole riveting block, increasing the cross-sectional areas of connection and improving overcurrent capabilities, while also incorporating features like mounting grooves and holes to enhance energy density and reduce weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only one pole is arranged at the top cover for a battery, then the structure is simple, but the connection area between the pole and the interior of the battery is too small, resulting in weak overcurrent capability
Solution Approach 1:
The single pole is segmented into multiple pole bodies (first pole body and second pole body) that are arranged separately on the top cover. Each pole body connects to the interior of the battery at different positions, increasing the total connection area and improving overcurrent capability while maintaining a relatively simple overall structure
Solution Approach 2:
The pole structure transitions from a single-point connection to a multi-point distributed connection across the top cover surface. By arranging pole bodies at different spatial positions and connecting them to tabs at different locations, the connection area is expanded in multiple dimensions, enhancing current distribution and overcurrent capability
2Volume of moving object
If the cell thickness is reduced to achieve higher energy density, then the battery size is reduced, but the pole size becomes small and the connection area decreases, weakening the overcurrent capability
Solution Approach 1:
The pole structure is divided into multiple segmented pole bodies that can be distributed across the top cover. This segmentation allows the connection points to be spread out, increasing the total effective connection area even when the cell thickness is reduced, thereby maintaining overcurrent capability in thin-cell designs
Solution Approach 2:
When cell thickness is reduced, the pole connection strategy shifts from relying on thickness to utilizing planar distribution. Multiple pole bodies are arranged in the planar direction of the top cover, connecting to tabs at different horizontal positions, thus compensating for the reduced thickness-related connection area and maintaining overcurrent capability
Data Source
AI summary
Provided are a top cover for a battery, and a battery. The top cover for a battery includes a body; and a pole riveting block and a plurality of pole bodies, where the plurality of poles bodies are arranged on the body, and the plurality of poles bodies are connected to the pole riveting block.