Electric Storage Device Terminal Connection Routing
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Solution Overview
Problem
Conventional electric storage devices face limitations in achieving large capacity due to inefficient terminal connections and electrode configurations, which result in increased size and reduced capacity.
Innovation Solution
The design includes a case with a cutout portion on its side surface, where first and second terminals are positioned, and elongated conductive connection members that extend along the side and main surfaces, allowing for direct electrical connections between electrodes and terminals, reducing the distance between the electrode body and the case, thereby increasing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional terminal connections and electrode configurations are used, then the device structure is simple, but the capacity is limited and device size increases
Solution Approach 1:
The connection members extend in multiple dimensions - along the side surface from terminals toward the electrode body, and along the main surface to reach the electrode tabs. This multi-dimensional routing allows compact integration of terminals and electrode connections without increasing overall device volume, thereby improving capacity density.
Solution Approach 2:
The connection members are divided into multiple segments: a first connection member connecting the first terminal to the first electrode tab, and a second connection member connecting the second terminal to the second electrode tab. This segmentation allows independent optimization of each connection path, reducing overall device size while maintaining high capacity.
2Quantity of substance
If terminal connections extend along both side and main surfaces, then capacity increases, but device complexity increases
Solution Approach 1:
The connection members serve multiple functions: they provide electrical connection between terminals and electrode tabs, structurally integrate the case and electrode body, and define the spatial relationship between components. This multi-functionality reduces the need for separate components, thereby increasing capacity without proportionally increasing complexity.
Solution Approach 2:
The connection members are integrated directly into the case structure, merging the terminal support function with the connection function. This consolidation eliminates separate mounting structures and reduces overall device complexity while maintaining enhanced capacity through optimized terminal-electrode connectivity.
3Quantity of substance
If the electrode body is positioned closer to the case, then capacity increases, but the risk of displacement increases
Solution Approach 1:
The connection members are pre-configured with specific routing paths - extending from terminals along the side surface toward the electrode body, then along the main surface to the electrode tabs. This preliminary configuration ensures proper positioning and reduces displacement risk while maximizing capacity through compact electrode-body integration.
Solution Approach 2:
The connection members provide localized structural support and positioning at critical interfaces - where terminals meet the case and where electrode tabs connect to the electrode body. This localized reinforcement maintains electrode body stability in the closer position, enabling high capacity without increasing displacement risk.
Data Source
AI summary
A case includes first and second opposed main surfaces and a side surface extending between the first and second main surfaces. An electrode body is housed in the case and including a first electrode, a second electrode, and a separator disposed between the first and second electrodes. First and second terminals are located on the side wall of the case. A first lead is electrically connected with the first electrode and extends from a side surface of the electrode body. A second lead is electrically connected with the second electrode and extends from the side surface of the electrode body. First and second connection members electrically connect the first and second leads to the first and second terminals, respectively. Each of the connection members includes a first part extending along the side surface of the case and a second part extending along the second main surface of the case.