Cylindrical Battery Current Collector With Adjustable Axial Column
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Solution Overview
Problem
Existing cylindrical batteries with end-face current collection structures require further performance improvements for higher output.
Innovation Solution
A power storage device with an electrode assembly where a first and second electrode plate are wound with a separator, and a current collector joined to the first electrode plate, featuring a plate-shaped flange and an adjustable axial length column, reducing resistance and enhancing electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional end-face current collection structure is used, then a steady high output can be expected, but further performance improvement is necessary to achieve higher output
Solution Approach 1:
The current collector extends from the end-face into the electrode assembly along the axial direction, transitioning from a two-dimensional end-face connection to a three-dimensional structure that spans multiple dimensions. This axial extension allows the current collector to establish electrical connections at multiple points along the electrode assembly, thereby enhancing both output capability and connection reliability simultaneously
2Adaptability or versatility
If the current collector has a fixed structure, then manufacturing is simplified, but adaptability to different electrode assembly sizes is reduced
Solution Approach 1:
The current collector incorporates a flexible columnar portion that can be adjusted in length to match different electrode assembly dimensions. This dynamic adjustment capability allows the same current collector design to adapt to various battery sizes and configurations, enhancing versatility without requiring completely different structures for each application
Solution Approach 2:
The current collector is divided into distinct functional segments: a plate-shaped flange for end-face connection, a columnar portion for axial extension, and potentially other specialized sections. This segmentation allows each part to be optimized independently for its specific function while maintaining overall structural coherence and manufacturability
Data Source
AI summary
A power storage device includes an electrode assembly where a positive electrode plate and a negative electrode plate are wound with a separator interposed between the positive electrode and negative electrode plates; and a positive electrode current collector joined to the positive electrode plate at an upper end of the electrode assembly in axial direction P. The positive electrode current collector includes a plate-shaped flange joined to the positive electrode plate at a face facing the positive electrode plate in axial direction P and a column with an adjustable length in axial direction P that protrudes from the flange toward an upper side in axial direction P.