Rechargeable Battery Current Collecting Member Vibration Stability
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Solution Overview
Problem
Rechargeable batteries face safety concerns due to potential short-circuits and electrical contact failures caused by vibrations and impacts, which can lead to battery failure and safety risks.
Innovation Solution
A rechargeable battery design featuring a current collecting member with a terminal connection portion, side plates bent from the lateral sides, and supporting portions that connect current collecting plates to the electrodes, providing mechanical and electrical stability and preventing movement of the electrode assemblies, thereby enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current collecting member uses a simple structure, then the device complexity is reduced, but the reliability deteriorates due to potential short-circuits and electrical contact failures from vibrations and impacts
Solution Approach 1:
The current collecting member is divided into multiple functional components: a terminal connection portion, multiple side plates extending from lateral sides, multiple current collecting plates fixed to electrode uncoated regions, and supporting portions connecting neighboring current collecting plates. This segmentation allows each component to perform its specific function while collectively providing enhanced stability and reliability against vibrations and impacts.
Solution Approach 2:
The current collecting member integrates multiple functions into a single unified structure that simultaneously provides electrical connection, mechanical support, and vibration resistance. The side plates and supporting portions work together to form a rigid framework that stabilizes electrode assemblies while maintaining electrical conductivity throughout the battery structure.
2Reliability
If the current collecting member uses a complex structure with side plates and supporting portions, then the reliability is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The side plates are pre-formed to extend from the lateral sides of the terminal connection portion, and the supporting portions are pre-configured to connect neighboring current collecting plates. This preliminary structuring allows for simplified assembly where components are pre-positioned and then secured, reducing the complexity of the manufacturing process while maintaining the enhanced reliability structure.
3Stability of the object's composition
If the side plates are bent from lateral sides of the terminal connection portion, then the mechanical stability is improved, but the device complexity increases
Solution Approach 1:
The side plates are bent into curved or angled configurations extending from the lateral sides of the terminal connection portion. This curvature provides mechanical advantage by distributing stress more effectively and creating a more stable structural framework that resists vibrations and impacts, while the bent shape also helps secure the electrode assemblies in place.
Data Source
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AI summary
A rechargeable battery according to an exemplary embodiment includes a plurality of electrode assemblies each comprising a first electrode, a second electrode, and a separator interposed between the first and second electrodes, each electrode having a coated and an uncoated region, a case for mounting the plurality of electrode assemblies therein, a cap plate for closing an opening in the case, a first terminal protruding through the cap plate and being electrically coupled to a first current collecting member; the first current collecting member mechanically and electrically coupling each first electrode of the plurality of electrode assemblies to the first terminal; the first current collecting member further comprises: a plurality of current collecting plates, each current collecting plate being fixed to an uncoated region of one of the plurality of first electrodes, and a plurality of supporting portions connecting neighboring current collecting plates, wherein the first current collecting member comprises a terminal connection portion and a side plate extending from a lateral side surface of the terminal connection portion and electrically coupling the plurality of current collecting plates to the first terminal.