Battery Vent Valve Structure With Liquid Barrier Against Moisture
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Solution Overview
Problem
Existing valve structures in power storage devices, such as check valves and breaker valves, fail to prevent moisture infiltration effectively, leading to battery degradation due to incomplete prevention of air infiltration and backflow.
Innovation Solution
A valve structure with a liquid reservoir part inside the passage that stores a permeable liquid, combined with a check valve that opens to vent gas when internal pressure increases, preventing backflow and moisture infiltration by using a liquid reservoir part located away from the opening to prevent liquid flow outside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve is used to prevent backflow, then gas venting is improved, but moisture infiltration prevention is insufficient
Solution Approach 1:
A liquid reservoir containing liquid is introduced as an intermediary substance in the passage. The liquid acts as a barrier that moisture cannot penetrate, while gas can bubble through. This intermediary liquid layer effectively blocks moisture infiltration while maintaining gas venting capability, resolving the contradiction between reliable gas venting and moisture prevention.
Solution Approach 2:
The liquid in the reservoir creates an inert barrier environment that moisture cannot penetrate. By positioning the liquid reservoir away from the opening, the liquid forms a protective barrier that prevents moisture from the external environment from infiltrating into the container, while still allowing gas to escape through the liquid.
2Stress or pressure
If a breaker valve is used to vent gas, then pressure relief is improved, but air infiltration occurs through the rupture
Solution Approach 1:
The liquid reservoir serves as an intermediary barrier in the passage. When the breaker valve ruptures and vents gas, the liquid in the reservoir prevents air from following through the rupture into the container. The liquid acts as a one-way barrier that allows gas escape but blocks air infiltration, resolving the contradiction between pressure relief and preventing air entry.
3Object-affected harmful factors
If the liquid reservoir part is positioned near the opening, then moisture blocking is improved, but liquid may flow outside
Solution Approach 1:
The liquid reservoir is positioned in a different spatial dimension - away from the opening and deeper within the passage structure. This dimensional repositioning allows the liquid to effectively block moisture from the external environment while being contained within the passage boundaries, preventing liquid from flowing outside while maintaining its moisture-blocking function.
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 valve structure effectively prevents moisture infiltration into the power storage device, reducing the risk of battery degradation by ensuring that gases are vented while maintaining a moisture-free environment.
Implementation Method 1
storing a liquid through which gas generated by the power storage device element is permeable
Data Source
AI summary
A valve structure includes a passage communicating the inside of a container housing a power storage device element with outside, and a liquid reservoir part located inside the passage and storing a liquid through which gas generated by the power storage device element is permeable.