Battery Cell Current Path Layout for Lower Internal Resistance
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Solution Overview
Problem
Existing battery cells face challenges in increasing charging and discharging efficiency, particularly in reducing internal resistance to enhance performance in devices such as electric vehicles and renewable energy systems.
Innovation Solution
The battery cell design includes a specific configuration of electrodes, current collectors, and insulating members, with non-coating regions connected to the case and pin member, forming distinct current paths that reduce internal resistance and improve charging and discharging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional battery cell structure is used, then manufacturing simplicity is maintained, but internal resistance is high and charging/discharging efficiency is low
Solution Approach 1:
The battery cell structure is segmented into distinct functional zones: a case with first non-coating region for anode connection, a cap plate with second non-coating region for cathode connection, and a core with third non-coating region for cathode connection. This segmentation creates separate current paths that reduce internal resistance and improve charging/discharging efficiency while maintaining manageable structural complexity through modular design.
2Loss of energy
If internal resistance is reduced to improve charging efficiency, then energy loss decreases, but structural complexity increases
Solution Approach 1:
Non-coating regions are strategically positioned at specific locations: the case has a first non-coating region, the cap plate has a second non-coating region, and the core has a third non-coating region. Each non-coating region is locally optimized to create efficient current paths with reduced resistance, minimizing energy loss while avoiding unnecessary structural complexity through targeted rather than universal modifications.
Data Source
AI summary
A battery cell according to the present disclosure may include: an electrode assembly including a first electrode, a second electrode and a separator; a case accommodating the electrode assembly and electrically connected to the first electrode; a cap plate connected to the case; a terminal member provided on the cap plate; and a pin member disposed on a core of the electrode assembly and electrically connected to the second electrode and the terminal member.