Rechargeable Battery Current Collector Segmentation Impact Protection
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Solution Overview
Problem
Rechargeable batteries are prone to damage and potential explosion due to external impacts, which can occur when components like the insulator or electrode assembly are damaged by internal parts such as the tab or current collecting member.
Innovation Solution
A rechargeable battery design featuring an electrode assembly with uncoated regions and a current collecting member that includes a first and second current collector, a connecting portion, and a cap assembly to prevent damage from external impacts by distributing force and preventing pressure on the insulator or electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current collecting member is positioned between the cap assembly and the electrode assembly, then electrical connection is achieved, but the insulator or electrode assembly may be damaged by external impacts
Solution Approach 1:
The current collecting member is divided into multiple segments: a first current collecting plate connected to the cap assembly, a second current collecting plate contacting the electrode assembly, and a connecting portion linking them. This segmentation allows the structure to absorb and distribute impact forces while maintaining electrical connectivity, preventing damage to the insulator or electrode assembly during external impacts
Solution Approach 2:
The connecting portion acts as an intermediary element between the first and second current collecting plates. It provides mechanical flexibility and force distribution, serving as a buffer that protects the electrode assembly and insulator from direct impact forces while maintaining the electrical connection path
2Stability of the object's composition
If the current collecting member is rigid to ensure electrical connection, then connection stability is improved, but damage to insulator or electrode assembly occurs during external impacts
Solution Approach 1:
The connecting portion is designed with dynamic characteristics, allowing it to deform and flex in response to external impacts. This dynamic behavior enables the structure to absorb impact energy while maintaining electrical connection stability, preventing rigid force transmission to the electrode assembly and insulator
Data Source
AI summary
Embodiments of the present invention are directed toward a rechargeable battery including: an electrode assembly including a first electrode and a second electrode, each of which includes an electrode plate and an electrode uncoated region; a case for accommodating the electrode assembly and having an opening; a cap assembly coupled to the opening to seal the case; and a current collecting member between the cap assembly and the electrode assembly and respectively coupled to an electrode uncoated region of the first electrode and an electrode uncoated region of the second electrode. The current collecting member includes a first current collector that faces one side of the cap assembly, a second current collector that contacts the electrode uncoated region, and a connecting portion that is shifted toward one side of the first current collector and connects the first and second current collectors.