Integrated Electrode Terminal Structure for Lower Battery Resistance
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Solution Overview
Problem
Existing battery manufacturing processes result in increased internal resistance due to intermediate parts like electrode tabs and current collectors, leading to decreased quick charging performance and increased heat generation.
Innovation Solution
The proposed solution involves an improved electrical connection structure between the battery electrode and the external terminal, where the electrode terminal is formed by cutting uncoated portions of the substrate, reducing the number of parts and internal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrode tabs and current collectors are used to connect battery electrodes to external terminals, then the electrical connection structure is complete and functional, but the internal resistance increases and quick charging performance decreases
Solution Approach 1:
The patent merges the electrode substrate and electrode terminal into a single integrated component. The electrode terminal is formed by cutting uncoated portions of the electrode substrate itself, eliminating the need for separate electrode tabs and current collectors. This integration reduces the number of connection interfaces and material layers, thereby decreasing internal resistance and improving quick charging performance while maintaining complete electrical connection functionality.
Solution Approach 2:
The patent extracts and removes the intermediate connection parts (electrode tabs and current collectors) from the battery structure. By using the electrode substrate itself as the terminal material through selective cutting of uncoated portions, the design eliminates unnecessary intermediate components that contribute to internal resistance, achieving a more direct electrical connection path between the electrode and external terminal.
2Reliability
If electrode tabs and current collectors are used in battery manufacturing, then the electrical connection is established, but the manufacturing process becomes complex and productivity decreases
Solution Approach 1:
The patent combines the electrode substrate and terminal into one component, allowing the terminal to be formed directly from the substrate through cutting processes. This merger eliminates multiple assembly steps involving separate tabs and current collectors, simplifying the manufacturing process and improving productivity while ensuring reliable electrical connection.
Solution Approach 2:
The patent applies segmentation by cutting uncoated portions of the electrode substrate to create the terminal structure. This selective cutting divides the substrate into functional regions (coated active material areas and uncoated terminal areas), enabling the terminal to be formed integrally with the electrode in a single manufacturing process rather than requiring separate component assembly.
3Reliability
If multiple intermediate parts are used for electrical connection, then the connection structure is robust, but the number of parts increases and costs increase
Solution Approach 1:
The patent merges multiple separate components (electrode substrate, electrode tabs, and current collectors) into a single integrated electrode structure. The terminal is formed directly from uncoated portions of the substrate, eliminating the need for separate connection parts. This reduction in component count simplifies the overall device structure while maintaining connection stability through the integral design.
Data Source
AI summary
An electrode, an electrode assembly, and a battery are disclosed. An electrode includes a first coated portion including an active material on a first substrate, and a first electrode terminal which is formed by cutting a portion of a first uncoated portion of the first substrate on which the active material is not applied and has a shape of which an end portion is configured to be exposed or extend to an outside of a battery.