Battery Anti-Explosion Valve Venting for Faster Pressure Release
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Solution Overview
Problem
Existing battery technologies face safety issues due to delayed or insufficient pressure release, leading to accidents such as firing or explosion.
Innovation Solution
A battery design that incorporates an anti-explosion valve with a notch groove and a controlled opening region, ensuring a sufficient area for pressure release relative to the battery capacity, thereby enhancing the pressure release rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the opening region area of the anti-explosion valve is increased, then the pressure release rate is improved, but the structural strength of the valve may be reduced
Solution Approach 1:
The anti-explosion valve is divided into multiple functional regions: a first region with through holes for pressure release, a second region with recessed grooves for structural reinforcement, and a third region for sealing. This segmentation allows the valve to achieve both high pressure release rate through optimized hole distribution and sufficient structural strength through the reinforced groove patterns, resolving the contradiction between opening area and structural integrity.
2Quantity of substance
If the battery capacity is increased, then the energy storage is improved, but the safety risk increases due to higher internal pressure
Solution Approach 1:
The invention optimizes the parameters of the anti-explosion valve including the area ratio of through holes to valve body (10%-30%), the depth of recessed grooves (0.5mm-2mm), and the distribution pattern of holes. These parameter changes enable the valve to handle higher internal pressures generated by larger capacity batteries while maintaining safe pressure release, thus allowing increased battery capacity without compromising safety.
Data Source
AI summary
A battery includes a battery shell and an anti-explosion valve disposed on the battery shell. A notch groove is disposed on the anti-explosion valve. The anti-explosion valve comprises an opening region. In a depth direction of the notch groove, an outer edge of an orthographic projection of the opening region is an opening boundary, an area S1 of the orthographic projection of the opening region in mm2 and a capacity A of the battery in Ah meet: S1>0.5 A.