Battery Insulating Plate Venting for High-Temperature Gas Release
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Solution Overview
Problem
Secondary batteries face challenges in safely discharging gases at high temperatures without structural failure due to high-pressure buildup.
Innovation Solution
A secondary battery design featuring an insulating plate with gas discharge holes, partitioned to manage pressure, and a polyimide tape with gas moving holes to regulate gas pressure and prevent rupture, coupled with a cap plate vent for efficient gas release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas discharge holes are added to the insulating plate, then gas discharge capability is improved, but structural integrity may deteriorate
Solution Approach 1:
The insulating plate is segmented with multiple gas discharge holes distributed across its surface, dividing the gas discharge function into multiple locations. This segmentation allows gas pressure to be released at multiple points rather than concentrating stress at a single location, preventing plate rupture while maintaining structural integrity
Solution Approach 2:
The insulating plate has non-uniform thickness with thicker regions providing structural support and thinner regions containing gas discharge holes for gas release. This local quality differentiation allows the plate to simultaneously maintain strength in critical areas while enabling gas discharge in specific locations
2Productivity
If the insulating plate thickness is reduced at gas discharge regions, then gas discharge efficiency is improved, but mechanical strength deteriorates
Solution Approach 1:
The insulating plate features variable thickness with thinner regions at gas discharge locations and thicker regions elsewhere. This local quality variation enables efficient gas discharge through reduced material thickness at critical points while maintaining overall structural strength through thicker supporting regions
3Reliability
If partitions are added to separate gas discharge holes, then gas pressure control is improved, but device complexity increases
Solution Approach 1:
Partitions divide the gas discharge holes into separate sections, segmenting the gas discharge function. This segmentation allows independent control of gas flow through different holes, improving gas pressure management while the partitions themselves are simple structural elements that do not significantly increase overall device complexity
Data Source
AI summary
The present invention provides a secondary battery including an insulating plate which enables easy gas discharge and is not broken at high temperature. For this purpose, disclosed is a secondary battery comprising: a case including a space therein through an opening; at least one electrode assembly inserted into the space of the case; an insulating plate formed at an upper part of the electrode assembly; and a cap plate which is coupled to the opening of the case and includes a vent, at least one region of which has a thinner thickness than other regions, wherein the insulating plate includes a plurality of gas discharge holes disposed at a region corresponding to the vent.