Secondary Battery Insulating Member Shock Protection
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Solution Overview
Problem
Secondary batteries are prone to damage from shocks or vibrations due to direct contact between the electrode assembly and the case's inside protrusion, leading to potential short circuits and instability.
Innovation Solution
Incorporating an upper insulating member with an extended side surface portion, ranging from 0.8 mm to 1.5 mm, to prevent contact between the electrode assembly and the case's inside protrusion, and optionally a lower insulating member, both made of polypropylene, to enhance protection and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the electrode assembly directly contacts the case's inside protrusion portion, then the structural support is improved, but the stability deteriorates due to damage from shocks or vibrations
Solution Approach 1:
An insulating member is introduced as an intermediary component between the electrode assembly and the case's inside protrusion portion. This insulating member prevents direct contact while maintaining structural support, thereby resolving the contradiction between strength and stability by eliminating the harmful interaction during shocks or vibrations.
Solution Approach 2:
The insulating member is pre-installed to provide protective cushioning before any shock or vibration occurs. This beforehand protection prevents the electrode assembly from contacting the case's inside protrusion portion during subsequent shocks, thus maintaining stability while preserving structural support.
2Reliability
If the insulating member is extended closer to the electrode assembly, then the protection is improved, but the device complexity increases
Solution Approach 1:
The insulating member is extended partially toward the electrode assembly by a specific distance (0.8 mm to 1.5 mm), which is sufficient to provide adequate protection without requiring full contact. This partial extension achieves the necessary protection level while avoiding excessive complexity in the device structure.
Data Source
AI summary
In one aspect, a secondary battery capable of preventing a damage of an electrode assembly by preventing the electrode assembly from contacting an inside protrusion portion of a case when subjected to a shock or vibration is provided.