Pressure Control Valve Cover Structure for Uniform Opening Pressure
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Solution Overview
Problem
The existing pressure control valve structures in power storage modules face issues due to warping of the cover, which leads to non-uniform pressing forces on elastic valve bodies, resulting in varied valve opening pressures.
Innovation Solution
A pressure control valve structure with a cover made of resin, featuring a thick-walled portion and a flat inner surface that presses the elastic valve bodies, is designed to suppress warping and ensure uniform compression, thereby maintaining consistent valve opening pressures across multiple valve bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cover is formed by injection molding, then the manufacturing process is simple and efficient, but warping occurs during molding which results in non-uniform pressing forces on the elastic valve bodies
Solution Approach 1:
The patent introduces a thick-walled portion at a specific location on the cover to locally enhance rigidity. This localized structural modification allows the cover to maintain uniform pressing forces on the elastic valve bodies while still being formed by injection molding, thus resolving the contradiction between manufacturing efficiency and pressing force uniformity.
2Weight of moving object
If the cover is made thin to reduce weight and material usage, then the cover becomes more lightweight and material-efficient, but the cover becomes more prone to warping during injection molding
Solution Approach 1:
The patent maintains the cover as a thin-walled structure overall for weight reduction, but introduces a localized thick-walled portion that provides enhanced rigidity and dimensional stability during molding. This allows the cover to remain lightweight while preventing warping, resolving the contradiction between weight reduction and dimensional stability.
3Device complexity
If the cover is made uniformly thick throughout, then the structure is simple and easy to manufacture, but the cover is prone to warping due to lack of localized reinforcement
Solution Approach 1:
The patent employs a cover with non-uniform thickness, featuring a specifically positioned thick-walled portion that provides localized reinforcement. This design maintains relative structural simplicity while effectively preventing warping, resolving the contradiction between structural simplicity and warping resistance.
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
This configuration effectively suppresses warping of the cover, ensuring uniform compression and consistent valve opening pressures, enhancing the reliability and performance of the pressure control valve in power storage modules.
Implementation Method 1
The cover has a thick-walled portion where the cover is made partially thick. The thick-walled portion is formed protruding outwardly from an outer surface of the cover opposite from the inner surface so that a distance from the inner surface to a protruded end of the thick-walled portion is greater than a distance from the inner surface to the outer surface in a thickness direction of the cover.
Implementation Method 2
a cover made of a resin and fixed to the outer peripheral wall portion, the cover having a flat inner surface that presses the second end surface so as to compress the elastic valve bodies towards their associated projections
Implementation Method 3
The elastic valve body is accommodated in a case where one end of the opening is formed with the elastic valve body pressed by a cover member (cover) fixed to the case. The elastic valve body pressed by the cover member closes the one end of opening in an elastically deformed state. When the internal pressure increases, the elastic valve body may deform due to pressure of gas from the opening
Data Source
AI summary
A pressure control valve structure includes a wall portion having a plurality of communication holes communicating with their associated internal spaces, a plurality of projections protruding outwardly from a wall surface of the wall portion so as to surround their associated communication holes, a plurality of elastic valve bodies closing their associated communication holes in contact with the projections, an outer peripheral wall portion protruding from the wall surface so as to surround the plurality of projections collectively, and a cover made of a resin and fixed to the outer peripheral wall portion, the cover compressing the elastic valve bodies towards their associated projections. The cover has a thick-walled portion where the cover is made partially thick in an outer surface of the cover.