Hermetically Sealed Capacitor for Implantable Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing capacitor designs for implantable devices, such as implantable cardioverter defibrillators, do not maximize usable space within the device case, requiring a larger size to achieve the same electronic performance and are not highly compact or reliable.
Innovation Solution
A hermetically sealed capacitor design featuring an anode element with a feed-through barrel, a cathode element, and case portions that are hermetically sealed together, using a metal substrate with a noble metal alloy layer and an electrolytic solution, allowing for efficient energy storage and pulse delivery, with the anode element having a protective wrap and the electrolytic solution comprising water, inorganic acids, and an organic solvent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing capacitor designs are used in implantable devices, then the device can function, but the case size must be larger to achieve the same electronic performance
Solution Approach 1:
The capacitor is divided into two separate case portions (first case portion and second case portion) that are hermetically sealed together, allowing optimized internal structures for the anode element and cathode element respectively. This segmentation enables better space utilization while maintaining the required electronic performance.
Solution Approach 2:
The anode element is positioned within the first case portion and the cathode element within the second case portion, with both elements nested within the hermetically sealed capacitor case. The feed through barrel extends through the case portions to provide electrical connection, creating a compact nested arrangement that maximizes space efficiency.
2Quantity of substance
If existing capacitor designs are used, then the capacitor can store energy, but it requires more space and is not compact
Solution Approach 1:
The first case portion and second case portion are designed with different internal configurations optimized for their respective elements. The first case portion accommodates the anode element with specific structural requirements, while the second case portion is configured for the cathode element, allowing each component to occupy optimal space for its function.
Solution Approach 2:
The hermetic seal configuration uses a three-dimensional arrangement where the first and second case portions are joined at different depths, creating a multi-level internal structure. This dimensional approach allows efficient packing of the anode and cathode elements while maintaining energy storage capacity.
3Reliability
If the case portions are hermetically sealed together, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The hermetic seal is divided into two separate case portions that can be manufactured and prepared independently before assembly. This segmentation allows for specialized manufacturing processes for each portion while maintaining the overall hermetic integrity through the joining interface.
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 design enables a compact, reliable, and efficient energy storage and delivery system capable of providing at least 80% of stored energy as pulses, suitable for implantable devices, with improved space utilization and enhanced performance.
Implementation Method 1
The hermetically sealed capacitor includes an anode element having an anode lead, a feed through barrel, a cathode element, and an electrolytic solution disposed between the first and second case portions
Implementation Method 2
a noble metal/base metal electrode element layer electrochemically deposited thereon
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2C
AI summary
A hermetically sealed capacitor and method of manufacturing are provided. The hermetically sealed capacitor includes an anode element having an anode wire and a feed through barrel, a cathode element, a first case portion having a first opening portion and a second case portion having a having a second opening portion. The first and second opening portions form an opening configured to mate with the feed through barrel. The first opening portion may include a slot portion configured to receive the feed though barrel. The first and second opening portions may include first and second mating portions respectively, the first and second mating portions being configured to mate with the feed through barrel. The hermetically sealed capacitor may also include electrolytic solution disposed between the first and second case portions.