Capacitor Anode Slot Design for Electrical Isolation
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Solution Overview
Problem
Conventional electrolytic capacitor designs face challenges in efficiently connecting the anode to the case while isolating the cathode, leading to potential short circuits and suboptimal capacitor performance.
Innovation Solution
The design features an anode with slots or wells within the case, where the cathode plates are electrically isolated from the anode using a separator, and the anode is mechanically and electrically connected to the case, allowing for a more compact and efficient capacitor structure with enhanced capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cathode is electrically connected to the case and the anode is isolated through an insulated penetration, then the electrical connection is established, but the device complexity increases and potential short circuits may occur
Solution Approach 1:
The patent inverts the conventional connection approach by making the anode the common reference (electrically connected to case) rather than the cathode. This reversal simplifies the isolation requirements and eliminates the need for insulated penetrations, as the cathode slots are naturally isolated by the anode material itself.
Solution Approach 2:
The patent extracts the isolation function from a separate insulation component and integrates it into the anode structure itself. The anode material serves dual purposes: as the active electrode and as the isolation barrier, eliminating the need for additional insulation elements.
2Reliability
If conventional capacitor designs are used with separate anode and cathode connections, then electrical connection is achieved, but the capacitor weight increases and capacitance density decreases
Solution Approach 1:
The patent merges the cathode connection structure with the anode body by forming cathode slots directly within the anode. This integration eliminates separate connection components and reduces overall capacitor weight while maintaining electrical isolation and connection functionality.
Solution Approach 2:
The cathode plates are nested within slots of the anode structure, creating a compact configuration where the cathode is housed inside the anode body. This nested arrangement maximizes capacitance density within a reduced volume and weight.
3Ease of manufacture
If the anode is made as a solid structure without slots, then manufacturing is simpler, but the capacitance and energy storage capacity are reduced
Solution Approach 1:
The anode is segmented into regions with cathode-receiving slots while maintaining structural integrity. This segmentation allows multiple cathode plates to be accommodated within the anode body, increasing total capacitance without significantly complicating the manufacturing process.
Data Source
AI summary
A capacitor and a method for assembling a capacitor. A capacitor is assembled from a case, which contains an anode that is electrically coupled to the case and defines wells or slots receiving a plurality of cathode plates. A header is placed on the case. The header also supports a glass seal that insulates the lead tube and cathode lead coming from the cathode. Once assembled, the capacitor is filled with electrolyte. A weld extends around the header to secure the header to the case. A bent cathode configuration enables a plurality of cathode plates electrically coupled together from a common cathode plate.