Stacked Electrode Lead Gripper for Low-Resistance Pouch Cell Contact
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Solution Overview
Problem
Conventional pressure activation devices for pouch type batteries lack an efficient coupling and contact structure for electrode leads, leading to reduced process efficiency and increased contact resistance during charging/discharging.
Innovation Solution
An electrode lead gripper with a mounting frame, supporting plate, and electrode terminal assembly, where the current and voltage electrode terminals are stacked and mounted on an insulating base, providing improved contact reliability and increased contact area, reducing heat generation and enhancing charging/discharging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional pressure activation devices use separate processes for pressing and charging/discharging, then process efficiency is maintained, but overall productivity decreases
Solution Approach 1:
The patent combines the pressing function and charging/discharging function into a single integrated pressure activation device. The pressing unit with electrode lead gripper simultaneously performs mechanical pressing and electrical connection, eliminating the need for separate processes and thereby improving overall productivity.
Solution Approach 2:
The pressure activation device is designed to perform multiple functions: pressing the pouch type battery cell, maintaining electrical connection during pressing, and enabling charging/discharging operations all through a single device. This multi-functionality resolves the contradiction by improving productivity without requiring multiple separate devices.
2Reliability
If conventional devices use simple contact terminals for electrode leads, then device complexity is reduced, but contact reliability decreases
Solution Approach 1:
The electrode lead gripper is divided into distinct functional components: a pressing unit for mechanical compression and an electrode terminal assembly for electrical connection. This segmentation allows each component to be optimized for its specific function, improving contact reliability while maintaining reasonable device complexity.
Solution Approach 2:
The electrode terminal assembly acts as an intermediary between the pressing unit and the electrode lead. It provides a dedicated interface for electrical connection, ensuring reliable contact while allowing the pressing unit to focus on mechanical compression. This intermediary structure resolves the contradiction between reliability and complexity.
3Reliability
If electrode terminals have small contact area, then device complexity is reduced, but contact resistance increases
Solution Approach 1:
The electrode terminal assembly extends in multiple dimensions to increase contact area. The terminal structure includes extended contact surfaces and multiple contact points, transforming a simple point contact into a distributed surface contact, thereby reducing contact resistance without excessive complexity.
4Reliability
If current and voltage electrode terminals are mounted separately, then contact reliability is improved, but device complexity increases
Solution Approach 1:
The current electrode terminal and voltage electrode terminal are nested within the same electrode terminal assembly, with the voltage terminal positioned above the current terminal. This nested arrangement provides electrical insulation between the two terminals while maintaining a compact structure, resolving the contradiction between reliability and complexity.
Data Source
AI summary
Disclosed is an electrode lead gripper for a pressure activation device, and, in particular, an electrode lead gripper for a pressure activation device in which a current electrode terminal is configured to be stacked and mounted onto an electrode terminal base separately from a voltage electrode terminal and thus improved in contact reliability and increased in contact area in terms of contact with an electrode lead of a pouch type battery cell, thereby having advantages of decreasing contact resistance, reducing the amount of heat generated during charging/discharging, and resulting in further enhancing a charging/discharging efficiency.