Medical Device Electrical Feedthrough Thermal Dissipation
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Solution Overview
Problem
Existing electrical feedthroughs for medical devices face challenges in efficiently dissipating heat and achieving optimal electromagnetic compatibility (EMC) while maintaining hermetic sealing and reliable electrical connections.
Innovation Solution
The integration of a metallic plug element that is soldered to contact pins on both the inner and outer sides of a glass body, providing a cohesive electrical connection and excellent thermal dissipation, along with elastic properties for secure assembly and efficient shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a metallic plug element is plugged onto contact pins and cohesively connected, then thermal dissipation is improved and EMC is enhanced, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single metallic plug element: electrical connection, thermal dissipation, and electromagnetic shielding. By integrating these functions into one component that plugs onto existing contact pins, the solution improves thermal dissipation and EMC without requiring separate additional components, thus resolving the contradiction between improved thermal performance and device complexity
Solution Approach 2:
The metallic plug element serves multiple purposes simultaneously: it provides electrical connectivity through cohesive connection to contact pins, acts as a heat sink for thermal dissipation, and functions as an electromagnetic shield. This multi-functionality allows the single component to address multiple technical requirements, improving thermal and electromagnetic performance while avoiding the complexity increase that would result from adding separate components for each function
2Object-affected harmful factors
If a metallic plug element is plugged onto contact pins, then electromagnetic compatibility is improved, but manufacturing complexity increases
Solution Approach 1:
The contact pins are pre-configured with cohesive connection surfaces and positioning features during the glass body manufacturing process. The metallic plug element is designed with predetermined engagement geometries that align with these pre-prepared features, enabling straightforward assembly without complex manufacturing steps. This preliminary preparation of connection interfaces simplifies the overall manufacturing process while achieving improved EMC
Solution Approach 2:
The metallic plug element acts as an intermediary component that bridges the glass body with external shielding requirements. Rather than modifying the glass body directly for EMC shielding or creating complex integrated structures, the plug element serves as a separate but easily attachable mediator that provides the necessary electromagnetic compatibility, thus simplifying manufacturing while improving EMC performance
3Reliability
If contact pins protrude from glass body on inner and outer sides, then electrical connection is improved, but assembly complexity increases
Solution Approach 1:
The patent merges the functions of electrical connection and mechanical retention into a single cohesive connection process. The metallic plug element simultaneously provides electrical pathways through its connection to multiple contact pins and mechanical securing through its interference fit or snap-fit engagement, eliminating the need for separate connection and retention mechanisms and thus reducing assembly complexity while improving electrical connection reliability
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 configuration enhances thermal dissipation, improves EMC, and simplifies assembly by ensuring reliable connections and shielding, meeting critical specifications for medical devices.
Implementation Method 1
an excellent thermal connection can be established between the two contact pins by the choice of a metallic plug element that is in contact with, preferably areal contact with, the at least two contact pins. As will still be explained in more detail below, this can particularly efficiently dissipate heat losses from an interior of the device to the outside
Implementation Method 2
contact pins can be understood to mean electrical connector pins that allow electrical power and/or signals to be transferred through the glass body
Implementation Method 3
the cohesive connection can preferably be brought about by soldering
Data Source
AI summary
An electrical feedthrough (1) is provided for improving the thermal properties and the electromagnetic compatibility (EMC) and also for simplified production of a medical instrument (7), in which electrical feedthrough individual contact pins (4), which are guided through a glass body (2) in a housing (20) of the instrument (7), are electrically connected to one another by a pluggable plug element (5), preferably in the form of a sheet metal part. Here, the plug element (5) firstly provides high thermal and electrical conductivity and secondly provides a shielding area that effectively prevents the input coupling of electromagnetic radiation. Preferably, the plug element (5) is formed in such a way that it independently develops a holding force for securing itself to the contact pins (4).