Cylindrical Battery Current Collector Layout for Higher Cell Capacity
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Solution Overview
Problem
The folded current collector plate in cylindrical batteries occupies significant space, leading to a decrease in battery capacity during production.
Innovation Solution
The use of a flat plate-shaped current collector plate connected to a conductive pillar and tab, allowing for a larger electrode core dimension within the same battery cell size, thereby improving capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a folded current collector plate is used to draw current from the electrode core, then the current can be effectively collected, but the current collector plate occupies large space, compressing the electrode core and decreasing battery capacity
Solution Approach 1:
The current collector plate transitions from a folded three-dimensional structure to a flat two-dimensional plate structure. This dimensional reduction eliminates the need for folding while maintaining current collection functionality, thereby reducing the space occupied by the current collector plate and increasing the volume available for the electrode core, which directly improves battery capacity
2Reliability
If the current collector plate is folded to connect the electrode core and terminal, then electrical connection is achieved, but the folded structure reduces the dimension of the electrode core in the first direction
Solution Approach 1:
The current collector plate adopts a flat plate structure instead of a folded structure, changing from three-dimensional to two-dimensional configuration. This allows the plate to maintain electrical connection functionality while occupying minimal space in the first direction, thereby preserving the full dimension of the electrode core and maximizing battery capacity
Data Source
AI summary
A battery cell, a battery pack, and a power consuming device are provided. The battery cell includes a housing, an electrode core, a first current collector plate, and a conductive pillar. A first tab is arranged at an end of the electrode core in a first direction. The electrode core is arranged in the housing. The first current collector plate and the conductive pillar are arranged at an end that is of the first tab and that is away from the electrode core. The first current collector plate is constructed into a flat plate shape. The first current collector plate is electrically connected to the conductive pillar and the first tab.