Stacked Solid Capacitor Anti-Oxidizing Layer Design
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Solution Overview
Problem
Conventional stacked-type solid capacitors face increased interfacial resistance and energy loss due to oxidation between the capacitive and conductive assemblies, leading to heat buildup and reduced lifespan.
Innovation Solution
A stacked solid electrolytic capacitor design featuring a capacitive module with sequentially connected capacitive units, a conductive module with anti-oxidizing layers between the negative terminal and conductive paste, and a packaging structure that partially exposes the terminals, effectively reducing interfacial resistance by preventing oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional stacked-type solid capacitor structure is used, then capacitor functions are achieved, but equivalent series resistance increases due to oxidation, causing energy loss and heat buildup
Solution Approach 1:
The conductive assembly employs a copper-nickel composite structure where the nickel layer protects the copper from oxidation. This prevents the formation of high-resistance oxide layers at the interface with the capacitive assembly, thereby maintaining low equivalent series resistance and reducing energy loss and heat generation during capacitor operation.
2Power
If conductive assembly is used for electrical connection, then electrical conductivity is achieved, but oxidation during high temperature manufacturing process increases interfacial resistance
Solution Approach 1:
The nickel layer serves as a protective intermediary between the copper conductive assembly and the capacitive assembly. During high temperature manufacturing processes, this nickel barrier prevents oxidation of the copper surface, ensuring that the electrical conductivity is maintained and interfacial resistance remains low after the manufacturing process completes.
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 implementation of anti-oxidizing layers significantly decreases the equivalent series resistance and extends the capacitor's lifespan by protecting the terminals from oxidation, enhancing the capacitor's performance and durability.
Implementation Method 1
The at least one anti-oxidizing layer is arranged between the negative terminal and the conductive paste layer
Implementation Method 2
The negative terminal is electrically connected to the negative portion of the one of the plurality of capacitive units through a conductive paste layer
Data Source
AI summary
A stacked solid electrolytic capacitor is provided in the present disclosure. The stacked solid electrolytic capacitor includes a capacitive module, a conductive module and a packaging structure. The capacitive module includes capacitive units stacked up sequentially. The conductive module includes a positive terminal, a negative terminal and at least one anti-oxidizing layer. The positive terminal is electrically connected to one of the capacitive units. The negative terminal is electrically connected to the one of the capacitive units through a conductive paste layer. The at least one anti-oxidizing layer is arranged between the negative terminal and the conductive paste layer. The packaging structure surrounds the capacitive module and the conductive module. Therefore, it is difficult for an oxide layer forming between the negative terminal and the capacitive units, and the equivalent series resistance of the stacked solid electrolytic capacitor can be reduced.