Battery Housing Filter Assembly for Fine Particle And Gas Capture
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Solution Overview
Problem
Existing battery systems lack effective solutions for filtering fine particles and gases generated during malfunctions, particularly in traction batteries of motor vehicles, which can lead to environmental pollution.
Innovation Solution
A filter device with a circumferential cover and filter element, incorporating a pressure relief valve and a separation screen, designed to capture harmful particles and gases, using heat-resistant materials and a multi-layer structure to ensure effective filtration and prevent bypassing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surface filters are used for particle filtration, then particle removal is achieved, but fine particles and gases cannot be effectively captured
Solution Approach 1:
The patent employs a depth filter element with porous structure that allows fluid passage while capturing fine particles and gases through its interconnected pore network. The porous material provides extensive surface area within the filter depth, enabling effective filtration of hazardous substances that surface filters cannot capture.
Solution Approach 2:
The filter device combines multiple materials with different properties: the cover is made of heat-resistant material to withstand high temperatures, while the depth filter element uses specialized porous materials for fine particle capture. This composite approach integrates thermal resistance with high-efficiency filtration capabilities.
2Object-generated harmful factors
If depth filtration is implemented, then fine particles are captured, but the filter structure becomes more complex
Solution Approach 1:
The depth filter element is nested within the cover structure, with the filter element positioned inside the circumferential cover. The sealing element is further nested to seal between the filter element and cover. This nested arrangement integrates multiple functions (filtration, sealing, structural support) into a compact unit, reducing overall system complexity despite the advanced filtration capability.
Solution Approach 2:
The patent merges the filter element, sealing element, and cover into a single integrated filter device assembly. The sealing element is circumferentially arranged to simultaneously seal the filter element to the cover and prevent bypass flow, combining multiple sealing functions in one component.
3Temperature
If high temperature resistance is ensured, then thermal stability is achieved, but material selection becomes more limited
Solution Approach 1:
The patent addresses temperature requirements by changing the material parameter of the cover to heat-resistant material. This parameter change enables the cover to withstand high temperatures from battery malfunctions while maintaining structural integrity and sealing effectiveness.
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 filter device effectively captures fine particles and gases, preventing environmental pollution by keeping them within the battery housing, while ensuring the system operates safely under high temperatures and pressure variations.
Implementation Method 1
A depth filtration is not described therein... The main function of the filter element is to capture fine, thereby harmful and hazardous, particles and/or gases caused by a malfunction of at least one battery cell inside the battery housing
Implementation Method 2
The pressure relief valve is mounted at the at least one opening and is configured to open the fluid passage of the cover of the filter device, when a predetermined excess pressure in the battery housing is reached or exceeded
Implementation Method 3
The cover is configured to accommodate a seat for the filter element via a circumferential extending filter sealing element, and to accommodate a seat for a circumferential extending sealing element... A rear side of the cover is mounted in a substantially fluid tight manner to the at least one opening
Data Source
AI summary
A filter device for filtering a fluid stream of a battery housing, for example of a traction battery of a motor vehicle, the filter device including a circumferential extending cover including a fluid passage and surrounding an interior space, and a filter element at least partially filling the interior space, the fluid passage being for fluid passing through the filter element. The cover being configured to accommodate a seat for the filter element via a circumferential extending filter sealing element, and to accommodate a seat for a circumferential extending sealing element.