Degassing Unit Protective Screen Direct Housing Attachment
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Solution Overview
Problem
Existing degassing units for electronics housings, particularly battery housings in motor vehicles, face challenges in providing a cost-effective and simple fire protection function, as they often rely on complex and expensive measures to ensure the protective screen remains attached and functional even after thermal impacts.
Innovation Solution
A degassing unit with a semipermeable membrane for gas exchange and a fluid-permeable protective screen that engages directly with the housing via a threaded fastening element, ensuring the protective screen remains fixed and functional even if the base body is destroyed by thermal impact, utilizing a self-tapping screw mechanism for attachment without separate metal thread inserts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex and expensive measures are used to ensure fire protection function, then the protective screen remains attached after thermal impact, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the fire protection function from the base body by providing the protective screen with its own independent thread engagement region. This allows the protective screen to be directly attached to the housing without relying on the base body's thread inserts, separating the fire protection function from the potentially thermally vulnerable base body structure.
Solution Approach 2:
The patent segments the attachment function by providing separate thread engagement regions on both the base body and the protective screen. This segmentation allows each component to have its own attachment path to the housing, ensuring that the protective screen remains attached even if the base body's attachment fails due to thermal damage.
2Reliability
If complex and expensive measures are used to ensure fire protection function, then the protective screen remains attached after thermal impact, but the manufacturing cost increases
Solution Approach 1:
The patent extracts the fire protection function from the base body by providing the protective screen with its own independent thread engagement region. This allows the protective screen to be directly attached to the housing without relying on the base body's thread inserts, separating the fire protection function from the potentially thermally vulnerable base body structure.
3Device complexity
If the protective screen is connected only to the base body, then the assembly is simple, but the protective screen may become detached if the base body is destroyed by thermal impact
Solution Approach 1:
The patent segments the attachment function by providing separate thread engagement regions on both the base body and the protective screen. This segmentation allows each component to have its own attachment path to the housing, ensuring that the protective screen remains attached even if the base body's attachment fails due to thermal damage.
Solution Approach 2:
The patent applies local quality by providing thread engagement regions at specific locations on both the base body and the protective screen. This allows the protective screen to have direct attachment capability at critical locations, ensuring fire protection function even when other parts of the assembly are thermally damaged.
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 solution provides a simple and cost-efficient fire protection function by ensuring the protective screen remains attached and functional after thermal events, reducing complexity and manufacturing costs while maintaining effective ingress protection and gas exchange.
Implementation Method 1
a gas passage opening (15) which is covered by a semipermeable membrane (6) which enables passage of gaseous media from an environment into the electronics housing and vice versa, but prevents passage of liquid media and/or solids
Implementation Method 2
the protective screen (2) comprises at least one screw through opening (23) which is present substantially aligned with the thread engagement region (11) of the base body (1), wherein the protective screen (2) comprises in the region of the screw through opening (23) a thread engagement region (232) which is to fix the protective screen (2) by means of a threaded fastening element directly relative to the electronics housing
Data Source
AI summary
A degassing unit for an electronics housing has a base body to be connected fluid-tightly to a rim of a pressure compensation opening of the electronics housing. The base body has a gas passage opening covered by a semipermeable membrane that enables passage of gaseous media but prevents passage of liquid and solids. A fluid-permeable protective screen with screen openings is arranged at an inner side of the base body across the gas passage opening. The base body has a thread engagement region for screw-connecting the degassing unit to the electronics housing. The protective screen has a screw through opening aligned with the thread engagement region of the base body. At the screw through opening, a thread engagement region of the protective screen is provided that fixes the protective screen by a threaded fastening element immediately relative to the electronics housing in a mounted state of the degassing unit.