Super Capacitor Roll Force Compensation and Separation Membrane
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Solution Overview
Problem
Conventional super capacitors face issues with thickness deviation due to roll force imbalances, center bending, and uneven electrolyte impregnation, leading to performance degradation and rapid heat generation and aging.
Innovation Solution
A super capacitor design with a roll force compensation member and a separation membrane featuring a nanofiber web layer on a nonwoven fabric layer to reduce thickness deviations and improve electrolyte impregnation, along with active material layers as a divided structure to facilitate bubble discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If coupling beams are disposed along edges of end plates to fix the energy storage assembly, then the assembly is securely fixed, but roll force is concentrated on outer edges causing center portion bending and thickness deviation
Solution Approach 1:
The patent introduces a roll force compensation member with varying thickness (thicker at center, thinner at edges) to locally compensate for the roll force concentration. This creates non-uniform local properties in the compensation member that counterbalance the non-uniform roll force distribution, preventing center portion bending while maintaining edge fixing strength.
Solution Approach 2:
The roll force compensation member acts as a counterweight element that offsets the harmful roll force effect. By positioning it at the center portion where bending occurs and making it thicker in that region, it provides counteracting support to prevent the convex bending caused by edge-concentrated roll forces.
2Stability of the object's composition
If coupling beams are disposed along edges of end plates, then the assembly structure is stable, but bubbles concentrate toward center portion forming air pockets that hinder electrolyte impregnation
Solution Approach 1:
The roll force compensation member serves as an intermediary element between the coupling beams and the energy storage assembly. It mediates the pressure distribution during electrolyte filling, preventing bubble concentration at the center by providing uniform downward pressure that forces bubbles toward the edges where they can escape, thereby ensuring uniform electrolyte impregnation.
3Device complexity
If conventional separation membrane is used in super capacitor, then the structure is simple, but thickness deviation occurs leading to degraded performance and rapid aging
Solution Approach 1:
The patent employs a composite separation membrane structure consisting of a base membrane layer and a deposited porous coating layer. This composite structure provides both mechanical integrity and controlled porosity, preventing thickness deviation and ensuring uniform electrolyte distribution, thereby improving performance stability without excessive complexity.
Solution Approach 2:
The separation membrane incorporates a porous coating layer with controlled pore structure that allows uniform electrolyte penetration. The porosity is optimized to prevent thickness deviation while maintaining ion conductivity, ensuring reliable capacitor performance and preventing rapid aging.
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 effectively compensates roll force imbalances, ensures uniform power generation, and prevents rapid aging by reducing thickness deviations and enhancing electrolyte distribution within the super capacitor.
Implementation Method 1
a separation membrane featuring a nanofiber web layer on a nonwoven fabric layer to reduce thickness deviations and improve electrolyte impregnation
Implementation Method 2
A super capacitor design with a roll force compensation member and a separation membrane featuring a nanofiber web layer on a nonwoven fabric layer to reduce thickness deviations
Implementation Method 3
along with active material layers as a divided structure to facilitate bubble discharge
Data Source
AI summary
Provided is a super capacitor. The super capacitor, according to an exemplary embodiment of the present invention, comprises: an energy storage assembly in which a plurality of unit modules are stacked; a sealing member arranged to surround the side portion of the energy storage assembly; upper and lower plates respectively arranged on the upper and lower portions of the energy storage assembly; and a roll force compensation member, arranged between the upper and lower plates and the energy storage assembly, for preventing the center portion of the energy storage assembly from being convexly bent toward the upper and lower plates. Accordingly, overall performance can be enhanced by reducing the thickness deviation for each position, and uniform power can be generated regardless of position by resolving imbalance in impregnation.