Battery Housing Venting Unit With Membrane-Piercing Pressure Relief
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Solution Overview
Problem
Housings for electronic components, such as battery cells in electric vehicles, cannot be completely gas-tight due to temperature fluctuations and air pressure changes, requiring a mechanism for pressure release while preventing foreign body ingress, dirt, and moisture.
Innovation Solution
A venting unit with a base body connected to a housing opening, featuring a gas passage opening closed by a membrane and an emergency venting spike that punctures the membrane upon activation, allowing for quick pressure release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a membrane closes the gas passage opening to prevent foreign body ingress and moisture, then sealing performance is improved, but pressure release speed deteriorates
Solution Approach 1:
The emergency venting spike is pre-positioned within the base body, ready to puncture the membrane upon activation. This preliminary positioning enables extremely rapid pressure release when needed, as the spike does not need to be transported or deployed from elsewhere, immediately breaching the membrane seal to equalize pressure.
Solution Approach 2:
The emergency venting function is extracted as a separate, dedicated component (the spike) within the base body, distinct from the normal membrane-based pressure compensation. This allows the membrane to maintain reliable sealing during normal operation while the extracted spike provides rapid emergency pressure release capability when activated.
2Object-affected harmful factors
If a semipermeable membrane is used for pressure compensation, then protection against foreign bodies and moisture is improved, but quick pressure release capability deteriorates
Solution Approach 1:
The emergency venting spike is pre-positioned within the base body, ready to puncture the membrane upon activation. This preliminary positioning enables extremely rapid pressure release when needed, as the spike does not need to be transported or deployed from elsewhere, immediately breaching the membrane seal to equalize pressure.
Solution Approach 2:
The membrane acts as an intermediary that normally provides selective permeability - allowing pressure compensation while blocking foreign bodies and moisture. When the emergency spike punctures it, the membrane transitions from a protective barrier to a breached seal, enabling rapid pressure equalization without requiring the spike to interact with external components.
3Object-affected harmful factors
If the housing is made gas-tight to prevent ingress of contaminants, then protection performance is improved, but pressure equalization capability deteriorates
Solution Approach 1:
The venting system transitions from a static membrane-based pressure compensation to a dynamic two-stage system. The membrane provides continuous passive pressure equalization, while the emergency spike provides active, rapid pressure release when needed. This dynamic capability allows the housing to adapt between maintaining seal integrity and rapidly equalizing pressure under different operating conditions.
Solution Approach 2:
The pressure management function is segmented into two distinct mechanisms: the membrane for normal pressure compensation and the emergency spike for rapid pressure release. This segmentation allows each component to be optimized for its specific function - the membrane for selective permeability and the spike for rapid breaching - while together providing both protection and pressure equalization capabilities.
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 rapid and controlled pressure release in case of excess pressure, ensuring the integrity of the housing while preventing the ingress of foreign substances.
Implementation Method 1
a gas passage opening (15) which is closed by a membrane (6) that spans areally across transversely to an axial direction (L)
Implementation Method 2
an emergency venting spike (19) which extends in axial direction (L) toward the membrane (6) and whose tip (191) or at least one cutting edge (192) in a state of rest is arranged spaced apart at a predetermined distance from a membrane surface (61, 62)
Data Source
AI summary
A venting unit for a housing has a base body to be connected fluid-tightly to a rim of a housing opening. The base body has a gas passage opening closed by a membrane that spans areally across the gas passage opening transversely to an axial direction. An actor is operatively connected to the base body and has an emergency venting spike extending axially toward the membrane. The emergency venting spike has a tip or a cutting edge arranged, in a state of rest, at a predetermined distance from a membrane surface of the membrane and can move toward the membrane when the actor is actuated so that tip or cutting edge punctures the membrane. A cover arranged at an outer side of the base body covers the gas passage opening. A fastening mechanism connects cover and base body. The actor has an actuation element for releasing the fastening mechanism.