Power Module Interface Sealing Against Corrosive Gas Ingress
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Solution Overview
Problem
Power modules face reliability issues due to corrosion from corrosive gases like hydrogen sulfide, which can damage electronic components and reduce module reliability, especially in harsh environments such as the rubber industry and mining applications.
Innovation Solution
A gas flow-inhibiting sealing is implemented at the interface between the module and the printed circuit board, using a deformable material with sacrificial particles to prevent corrosive gases from entering the module, ensuring a gas-tight connection and protecting the electronic components from corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas flow-inhibiting sealing is implemented at the module interface, then reliability is improved by preventing corrosive gas ingress, but device complexity increases due to the additional sealing component and assembly steps
Solution Approach 1:
The sealing is pre-integrated into the module housing structure before final assembly, creating a ready-to-seal interface that reduces assembly complexity while maintaining reliability benefits
Solution Approach 2:
The sealing combines multiple material properties (deformability for sealing, gas flow inhibition characteristics for protection) into a single integrated component that addresses both sealing and gas barrier requirements simultaneously
2Reliability
If a deformable sealing material is used to ensure gas-tight connection, then reliability is improved by adapting to interface variations, but manufacturing precision becomes more difficult to control due to material variability
Solution Approach 1:
The sealing material's deformability parameter is optimized to provide sufficient compliance for interface adaptation while maintaining consistent sealing pressure and gas barrier properties across production batches
Solution Approach 2:
The sealing acts as an intermediary element that compensates for interface variations between module and mounting base, absorbing dimensional tolerances and surface irregularities to ensure consistent gas-tight connections
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 solution significantly improves the electric and mechanical reliability of the module by preventing corrosive gas ingress, reducing convection, and protecting electronic components from corrosion, thereby enhancing the module's performance in harsh environments.
Implementation Method 1
convection may be stopped or strongly reduced by the gas flow-inhibiting sealing
Implementation Method 2
Gas diffusion through the sealing may be eliminated, suppressed or may still happen
Implementation Method 3
the properties of the material of the sealing in combination with a deformability of the sealing may ensure a substantially gas flow-tight connection
Data Source
Figure 1~4
Figure 5~9
AI summary
A module (100) which comprises an electronic component (102), an enclosure (104) at least partially enclosing the electronic component (102) and defining a module interface (106) at which the module (100) is to be mounted on a mounting base (152), and a gas flow-inhibiting, in particular gas flow-tight, sealing (108) at the module interface (106) configured for inhibiting gas from propagating from an exterior of the module (100) towards the electronic component (102) .