Battery Cap Assembly for Current Collector Plate Anti-Bending
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Solution Overview
Problem
Secondary batteries face issues with bending of current collector plates due to the weight of the electrode assembly, leading to potential structural instability and reduced coupling force between the cap assembly and insulating members.
Innovation Solution
A secondary battery design that fixes the current collector plate using a coupling hook provided in an insulating member, and fixes the insulating member using a coupling protrusion in the cap plate, enhancing the coupling force and preventing bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the current collector plate is left unsupported, then the structure is simpler, but the current collector plate bends due to the weight of the electrode assembly
Solution Approach 1:
The patent introduces an insulating member as an intermediary component between the current collector plate and the cap plate. This insulating member includes a coupling hook that engages with the current collector plate, providing mechanical support and preventing bending while maintaining electrical insulation. The intermediary structure resolves the contradiction by adding minimal complexity (a simple hook mechanism) to achieve the desired stability.
2Ease of manufacture
If the insulating member is loosely coupled to the cap plate, then the assembly is easier to manufacture, but the coupling force between cap assembly and insulating member is insufficient
Solution Approach 1:
The patent segments the coupling function into two distinct components: a coupling protrusion on the cap plate and a coupling hook on the insulating member. This segmentation allows for easy assembly through simple engagement of these two features while providing sufficient coupling force to secure the insulating member firmly to the cap plate, preventing any loose coupling issues.
Data Source
AI summary
A secondary battery includes: an electrode assembly including a first electrode tab and a second electrode tab; a first current collector plate electrically connected to the first electrode tab; a case in which the first current collector plate and the electrode assembly are accommodated; a cap plate sealing an upper end of the case and including a coupling protrusion protruding downward; and an insulating member coupled to and fixed to the coupling protrusion at a lower portion of the cap plate, and the first current collector plate is coupled to a coupling hook located under the insulating member to be fixed.