Battery Balance Valve Venting for Pressure Equalization and Moisture Blocking
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Solution Overview
Problem
The pressure difference between the inside and outside of a battery due to heating, cooling, and changes in external temperature causes a breathing effect, affecting the battery's sealing performance and leading to water vapor entry, which can reduce the battery's service life.
Innovation Solution
A balance valve with a breathable membrane and a gas barrier structure that opens or closes the ventilation channel based on pressure differences, preventing continuous water vapor entry and maintaining gas pressure balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the ventilation channel remains open to balance gas pressure, then gas pressure balance is achieved, but water vapor continuously enters the enclosed cavity through the breathable membrane
Solution Approach 1:
The gas barrier structure dynamically opens or closes the ventilation channel based on pressure differential. When internal pressure exceeds external pressure, the channel opens to balance pressure; when pressures are balanced, the channel closes to prevent water vapor ingress. This dynamic behavior resolves the contradiction between maintaining pressure balance and preventing harmful moisture entry.
Solution Approach 2:
The gas barrier structure automatically responds to pressure conditions without external control. The structure uses the pressure differential itself as the actuating force to open or close the ventilation channel, making the system self-regulating and eliminating the need for additional sensors or control mechanisms.
2Object-affected harmful factors
If the ventilation channel is closed to prevent water vapor entry, then water vapor accumulation is reduced, but gas pressure difference between inside and outside of the battery increases
Solution Approach 1:
The system dynamically transitions between closed and open states based on real-time pressure conditions. The ventilation channel closes when internal pressure exceeds external pressure to prevent water vapor entry, and opens when pressure differential decreases to maintain pressure balance, thus resolving the contradiction between preventing moisture accumulation and managing pressure differences.
Solution Approach 2:
The gas barrier structure autonomously adjusts the ventilation channel state in response to pressure differential changes, using the pressure force itself to drive the opening/closing mechanism without requiring external energy input or control systems.
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 effectively reduces water vapor accumulation, prolonging the service life of the battery and associated power consumption apparatus by ensuring balanced gas pressures and minimizing moisture ingress.
Implementation Method 1
a breathable membrane, the breathable membrane being arranged at one end of the ventilation channel, and the breathable membrane being configured to maintain the gas circulation of the ventilation channel
Implementation Method 2
when the gas pressures inside and outside the gas barrier structure are unbalanced, the gas barrier structure being configured to open the ventilation channel so as to achieve a balance of the gas pressure
Data Source
AI summary
A balance valve, a battery, and a power consumption apparatus are provided in the embodiments of the present application. The balance valve includes a body, a breathable membrane and a gas barrier structure, where the body is provided with a ventilation channel; the breathable membrane is arranged at one end of the ventilation channel; and, the gas barrier structure is arranged at the other end of the ventilation channel, and the gas barrier structure is configured to open the ventilation channel when the gas pressures inside and outside the gas barrier structure are unbalanced, so as to achieve the gas pressure balance between the inside and outside of the gas barrier structure. The balance valve is applicable to a battery, which could achieve a balance of gas pressures inside and outside the battery when there is a pressure difference between the inside and outside of the battery.