Battery Top Cover Explosion-Proof Valve Pressure Balance
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Solution Overview
Problem
The existing explosion-proof valves in batteries face issues with pressure differences between the inside and outside of the cavity, leading to inaccurate initiation pressures and compromised explosion-proof performance due to the space between the explosion-proof diaphragm and valve cover.
Innovation Solution
A top cover design for batteries that includes a mounting sheet with an opening, an explosion-proof valve with a valve body, explosion-proof diaphragm, and a valve cover, where the valve cover partially covers a ventilation groove on the valve body, ensuring pressure balance within the cavity and maintaining accurate initiation pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a space is provided between the explosion-proof diaphragm and valve cover, then the explosion-proof valve structure is formed, but a pressure difference between inside and outside is generated, resulting in inaccurate initiation pressure
Solution Approach 1:
The valve body is segmented into multiple functional regions: an inner ring containing the ventilation groove for pressure equalization, and an outer ring forming the structural boundary. This segmentation allows the pressure-balancing function to be separated from the structural containment function, enabling accurate initiation pressure while maintaining explosion-proof performance.
Solution Approach 2:
The ventilation groove acts as an intermediary channel between the inner and outer rings, allowing pressure equalization across the cavity. This intermediary structure enables the system to maintain accurate initiation pressure by facilitating pressure communication while still providing the necessary explosion-proof containment.
2Measurement precision
If the valve cover covers the ventilation groove, then pressure balance is achieved, but the structural complexity increases
Solution Approach 1:
The ventilation groove is integrated directly into the valve body structure, merging the pressure-balancing function with the main body rather than requiring a separate component. This combining approach achieves pressure balance while minimizing structural complexity and avoiding additional parts.
Solution Approach 2:
The valve body serves multiple functions simultaneously: it provides structural containment, forms the explosion-proof cavity, and incorporates the ventilation groove for pressure equalization. This multi-functionality eliminates the need for separate pressure-balancing components, reducing overall device complexity.
Data Source
AI summary
Provided are a top cover for a battery, a battery and an energy storage device. The top cover for the battery includes a mounting sheet and an explosion-proof valve. The mounting sheet has an opening defined thereon. The explosion-proof valve includes a valve body, an explosion-proof diaphragm and a valve cover. The valve body is mounted in the opening, and the valve body has a ventilation groove defined on an upper surface thereof. The valve cover is mounted on the upper surface of the valve body and configured to partially cover the ventilation groove. The explosion-proof diaphragm is mounted on a lower surface of the valve body. A cavity is defined by the valve body, the explosion-proof diaphragm and the valve cover and is in communication with outside through the ventilation groove.