Battery Balance Valve With Pressure-Triggered Moisture Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In power batteries, pressure differences due to heating and external temperature changes lead to breathing effects that affect sealing performance, resulting in reduced battery lifespan and increased water vapor entry, which can cause condensed water accumulation.
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 inside and outside the battery.
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 causing condensed water accumulation
Solution Approach 1:
The balance valve dynamically changes the state of the ventilation channel from always open to conditionally open or closed based on pressure difference. The valve opens when pressure difference exceeds a threshold to balance gas pressures, and closes when pressures are balanced to prevent water vapor entry, thus resolving the contradiction between pressure balancing and moisture prevention
Solution Approach 2:
The balance valve uses feedback from the pressure difference between inside and outside of the enclosed cavity to control its opening and closing. When the pressure difference reaches a preset threshold, the valve opens to equalize pressure; when pressures are balanced, the valve closes to prevent water vapor ingress, achieving both pressure balance and moisture protection through feedback control
2Object-affected harmful factors
If the ventilation channel is closed to prevent water vapor entry, then sealing performance is improved, but gas pressure balance cannot be achieved when pressure difference exists
Solution Approach 1:
The balance valve transitions from a static closed state to a dynamic system that automatically opens when pressure difference exceeds a threshold. This dynamic response allows the valve to maintain closure for sealing while providing automatic opening capability for pressure balancing, resolving the contradiction between sealing and pressure equalization
Solution Approach 2:
The balance valve is designed to automatically respond to pressure differences without external control. When the pressure difference reaches the threshold, the valve self-activates to open and balance pressure; when pressure is balanced, it self-closes to prevent water vapor entry, achieving both sealing and pressure balance through self-service operation
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 and extends the service life of batteries by ensuring balanced gas pressures and preventing moisture entry, thereby enhancing the battery's sealing performance and longevity.
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 balanced, the gas barrier structure is configured to close the ventilation channel, while the gas barrier structure is configured to open the ventilation channel when the gas pressures inside and outside the gas barrier structure are unbalanced
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.