Secondary Battery Insulation Cover Impact Protection
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Solution Overview
Problem
Existing secondary battery designs face challenges in protecting the electrode assembly from damage due to impacts, which can lead to deformation or short circuits, particularly due to the exposure of electrode terminals and collecting plates.
Innovation Solution
The design incorporates an insulation cover member that covers regions of the electrode terminal and collecting plate, positioned between the cap plate and the electrode assembly, with a shaped bottom surface matching the outer surface of the electrode assembly to prevent direct contact with hard surfaces, along with a sealing member to prevent electrolyte leakage and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrode terminals and collecting plates are exposed for electrical connection, then electrical connectivity is improved, but vulnerability to impact damage increases
Solution Approach 1:
The insulation cover member acts as an intermediary protective element that covers the electrode terminal and collecting plate. It includes a through hole allowing the electrode terminal to pass through for electrical connection, while the surrounding structure protects the collecting plate from impact damage. This mediator enables both electrical connectivity and impact protection simultaneously.
2Object-affected harmful factors
If insulation cover member is added to protect electrode components, then protection against impact is improved, but device complexity increases
Solution Approach 1:
The insulation cover member performs multiple functions simultaneously: it provides impact protection for the collecting plate, maintains electrical insulation, and allows electrical connection through its through hole structure. By combining protection and electrical functionality in a single component, the overall device complexity is minimized while achieving multiple protective and functional goals.
Data Source
AI summary
A secondary battery including an electrode assembly; a collecting plate electrically connected to the electrode assembly; a case accommodating the electrode assembly and the collecting plate; a cap plate coupled with the case; an electrode terminal electrically connected to the collecting plate, the electrode terminal extending through the cap plate; and an insulation cover member covering regions of the electrode terminal and the collecting plate, the regions of the electrode terminal and the collecting plate being between the cap plate and the electrode assembly.