Battery Explosion-Proof Device with Concave Valve Body
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Solution Overview
Problem
Existing battery explosion-proof devices face challenges in achieving accurate pressure release and flexible mounting due to the large volume and irregular shape of power battery packs, leading to potential gas emission irregularities and complex installation processes.
Innovation Solution
A battery explosion-proof device comprising a valve body with a concaved portion, a shaft portion with threads, a rupture plate for sealing, and a protecting cover, allowing for improved pressure accuracy and flexible installation positions, enhancing the safety and assembly of battery packs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an explosion-proof valve is installed in a power battery pack with large volume and irregular shape, then explosion prevention function is achieved, but installation difficulty increases due to limited space and complex geometry
Solution Approach 1:
The explosion-proof device is divided into separate components: a rupture plate, a valve body, and a protecting cover. These segmented parts can be independently manufactured and then assembled together within the battery pack, making installation much easier compared to installing a single integrated explosion-proof valve.
Solution Approach 2:
The rupture plate is disposed inside the concaved portion of the valve body, and the protecting cover covers the concaved portion. This nested structure allows the components to fit together compactly, saving space within the battery pack while maintaining the explosion-proof function.
2Reliability
If traditional explosion-proof structures are used, then basic explosion prevention is achieved, but pressure release accuracy is low and gas emission is non-uniform
Solution Approach 1:
A concaved portion is formed in the valve body at the location where the rupture plate is disposed. This localized structural feature concentrates the stress during pressure buildup, ensuring that the rupture plate breaks at a specific point and releases gas uniformly. The concaved portion acts as a stress concentration zone that improves pressure release accuracy.
3Volume of moving object
If an explosion-proof device with small exhaust area is used, then device size is reduced, but gas emission efficiency decreases and pressure release becomes non-uniform
Solution Approach 1:
The protecting cover covers the concaved portion and provides an external exhaust interface. This design separates the internal rupture area from the external exhaust area, allowing the exhaust opening to be positioned optimally for gas排放 while keeping the overall device compact. The three-dimensional arrangement of components maximizes gas emission efficiency within a small volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides enhanced pressure accuracy and flexible mounting options, improving the safety performance of battery packs by ensuring uniform gas emission and simplifying the assembly process, thereby preventing battery explosions effectively.
Implementation Method 1
a rupture plate which is disposed inside the concaved portion for sealing the venting passage
Data Source
AI summary
A battery explosion-proof device battery explosion-proof device includes a valve body, a rupture plate, and a protecting cover. The valve body includes a base portion and a shaft portion connected with the base portion. The shaft portion may be formed with threads on an external circumferential surface thereof and with a venting passage. The rupture plate may be disposed inside a concaved portion of the base portion for sealing the venting passage. The protecting cover covers the concaved portion.