Battery Housing Venting With Waterproof Membrane and Pressure Valve
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Solution Overview
Problem
Energy storage apparatuses face the challenge of preventing foreign matter, such as water, from entering the interior of the outer housing while allowing gas discharge during malfunctions, without compromising the hermetic seal or causing damage from high-pressure water exposure.
Innovation Solution
The energy storage apparatus incorporates a communication part with a functional membrane that allows gas passage while preventing liquid entry, and a pressure valve that adjusts pressure to facilitate gas discharge during malfunctions, while being positioned closer to the exterior than the functional membrane to maintain a hermetic seal under normal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a discharge port is provided to allow gas discharge during malfunctions, then gas discharge capability is improved, but foreign matter such as water can easily enter the interior of the outer housing
Solution Approach 1:
A flexible waterproof film is provided in the discharge port to selectively block foreign matter while allowing gas passage. The film can deform under pressure differential to permit gas discharge during malfunctions while maintaining a hermetic seal under normal conditions, thus resolving the contradiction between gas discharge capability and foreign matter prevention.
2Object-affected harmful factors
If the discharge port is hermetically sealed to prevent water ingress, then protection against foreign matter is improved, but gas discharge during malfunctions is hindered
Solution Approach 1:
The discharge port incorporates a dynamic waterproof film that changes its state based on pressure conditions. Under normal pressure, the film maintains a hermetic seal to prevent water ingress. During malfunctions when internal pressure increases, the film deforms dynamically to allow gas passage, thus maintaining both protection and discharge functions.
3Productivity
If a pressure valve is positioned closer to the exterior than the functional membrane, then gas discharge efficiency is improved, but the hermetic seal under normal conditions may be compromised
Solution Approach 1:
The pressure valve is positioned closer to the exterior with a flexible waterproof film between the valve and the membrane. This arrangement allows efficient gas discharge through the pressure valve while the flexible film maintains the hermetic seal under normal conditions by blocking the passage when no pressure differential exists.
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 prevents water ingress and allows efficient gas discharge during malfunctions, maintaining the integrity of the outer housing and preventing short circuits, even under high-pressure conditions.
Implementation Method 1
the communication part includes a functional membrane that allows passage of gas and prohibits passage of liquid
Data Source
AI summary
An energy storage apparatus includes one or more energy storage devices and an outer housing that houses the one or more energy storage devices. The outer housing includes an opening that allows communication between an interior and an exterior of the outer housing. The opening is sealed by a first pressure adjuster and a second pressure adjuster arranged complementary to each other. The first pressure adjuster allows passage of gas and prohibits passage of liquid. The second pressure adjuster prohibits passage of the gas and the liquid, and releases an internal pressure in the interior of the outer housing when the internal pressure exceeds a predetermined pressure.