Dual-Valve Pressure Equalization for Battery Housing Emergency Venting
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Solution Overview
Problem
Existing pressure equalization elements for battery housings in vehicles are complex in design, requiring significant manufacturing, assembly, and testing, and do not provide reliable emergency venting.
Innovation Solution
A pressure equalization element with two valve elements, subjected to different loads, allowing for overpressure and vacuum relief, utilizing compression springs and optionally magnets for space-saving design, ensuring reliable pressure equalization and emergency venting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex pressure equalization elements are used to provide both pressure equalization and emergency venting functions, then reliability of pressure management is improved, but device complexity and manufacturing requirements increase significantly
Solution Approach 1:
The pressure equalization element is divided into two separate valve elements: a first valve element for pressure equalization and a second valve element for emergency venting. Each valve element is independently designed and loaded, allowing simple manufacturing and assembly while ensuring reliable operation of each function. The segmentation enables each component to be optimized independently without increasing overall system complexity.
2Reliability
If two separate valve elements are used for pressure equalization and emergency venting, then functional reliability is improved, but installation space requirement increases
Solution Approach 1:
The first and second valve elements are arranged coaxially within the housing, with the first valve element positioned closer to the container interior and the second valve element positioned further away. Both valve elements share the same axial space and are guided by a common guide part, achieving nested arrangement that minimizes installation space while maintaining functional independence and reliability.
3Adaptability or versatility
If compression springs are used to generate pressure force for valve elements, then adjustable pressure relief thresholds are achieved, but device complexity increases
Solution Approach 1:
Compression springs are used to generate adjustable pressure forces on the valve elements. By selecting springs with different stiffness coefficients and pre-compression values, the pressure relief thresholds for both the first and second valve elements can be independently adjusted. This parameter-based approach provides versatility in setting pressure relief characteristics without requiring complex control systems or multiple components.
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
Enables reliable pressure equalization and emergency venting with a simple, compact design, effectively managing pressure differentials and preventing battery damage.
Implementation Method 1
The pressure force for the two valve elements is generated by at least one compression spring in each case
Implementation Method 2
Optionally, the compression force-generating compression spring can be combined with a magnet, which allows installation space advantages to be achieved. Alternatively, the compression force-generating compression spring can be replaced entirely by a magnet
Data Source
AI summary
A pressure equalization element is intended for containers, preferably for vehicle battery housings. It has a housing with at least one inlet and at least one outlet for a gaseous medium, preferably air. It also has a valve element which is located in the flow path of the gaseous medium from the inlet to the outlet. A second valve element is provided in the flow path of the gaseous medium from the inlet to the outlet so that the pressure equalization element with its simple design enables reliable pressure equalization and reliable emergency venting in the event of danger. Both valve elements are pressurized against each other with different forces, whereby the pressure forces are provided in such a way that at least one valve element can be moved into a vacuum relief position and at least the other valve element into an overpressure relief position.