Secondary Battery Cap Assembly With Insert-Injected Insulation
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Solution Overview
Problem
Conventional secondary battery cap assemblies are complex, leading to increased costs and reduced inner space, which limits capacity.
Innovation Solution
A simplified cap assembly structure featuring a cap plate with insert-injected insulation member, including a ring-shaped groove system and protrusions, to ensure electrical separation and venting, reducing complexity and cost while increasing inner space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional cap assembly structure is used, then electrical separation and venting functions are ensured, but the structure becomes complex and inner space is reduced
Solution Approach 1:
The patent combines multiple functional components (cap plate, insulation member, venting structure) into an integrated cap assembly where the insulation member is insert-injected directly into grooves on the cap plate, merging structural support and electrical insulation functions into a unified design that reduces overall complexity while maintaining inner space
Solution Approach 2:
The cap plate is designed with multiple functions integrated into single components: the grooves provide both structural attachment for insulation members and electrical isolation, while the venting structure simultaneously serves as both a safety release mechanism and a structural element of the cap assembly, reducing the number of separate components needed
2Reliability
If a conventional cap assembly structure is used, then electrical separation is ensured, but manufacturing costs increase
Solution Approach 1:
The insulation members are pre-formed with protrusions that match the grooves on the cap plate, allowing for preliminary preparation of components that can be quickly assembled through insert-injection, reducing manufacturing complexity and cost while ensuring reliable electrical separation is built into the design from the start
Solution Approach 2:
The insulation members act as intermediary components that are insert-injected into grooves on the cap plate, providing a simple yet effective mechanism to achieve electrical separation between different parts of the cap assembly without requiring complex insulation structures or additional fastening mechanisms
Data Source
AI summary
The present invention relates to a secondary battery, which has a simplified cap assembly structure to ensure an inner space, and thus can have increased capacity. Disclosed in one embodiment is a secondary battery comprising: an electrode assembly; a case for accommodating the electrode assembly; and a cap assembly coupled to the top of the case and electrically connected to the electrode assembly, wherein the cap assembly comprises: a cap plate having a ring-shaped first groove formed on the upper surface thereof, and a ring-shaped second groove formed on the lower surface thereof and connected to the first groove; and an insulation member insert-injected into the first groove.