Power Storage Device Electrolyte Buffer Layer Stress Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power storage devices face challenges in achieving improved output characteristics due to stress-induced degradation and increased electrical resistance caused by adhesive members, which affects the current collectors and active material layers.
Innovation Solution
The power storage device incorporates a configuration with electrolyte retaining layers acting as buffer members between the adhesive members and internal electrodes, reducing stress transmission and featuring lower adhesive power between these layers to minimize damage and enhance output performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesive members are used to integrate internal electrodes and separator, then structural integration is improved, but stress transmission damages current collectors and increases electrical resistance
Solution Approach 1:
The patent introduces a buffer layer as an intermediary component between the adhesive member and the internal electrodes. This buffer layer absorbs and distributes the stress generated by the adhesive member, preventing direct transmission of stress to the current collectors and active material layers. The buffer layer acts as a mediator that maintains structural integration while protecting the electrical components from damage and resistance increase.
2Strength
If adhesive power between adhesive member and internal electrodes is increased, then bonding strength is improved, but stress-induced damage to current collectors increases
Solution Approach 1:
The buffer layer serves as a mediator that decouples the bonding function from the stress transmission. The adhesive member maintains strong bonding to the buffer layer while the buffer layer's material properties and structure prevent stress from being transmitted to the internal electrodes, thus resolving the contradiction between bonding strength and stress-induced damage.
Solution Approach 2:
The patent changes the material parameters and structural properties of the buffer layer to optimize its stress-absorbing capabilities. By selecting appropriate material composition, thickness, and mechanical properties for the buffer layer, the system achieves effective stress distribution while maintaining adequate bonding strength for structural integration.
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 effectively suppresses damage to current collectors and maintains excellent output characteristics by reducing stress transmission from adhesive members, thereby improving the overall performance of the power storage device.
Implementation Method 1
The first electrolyte retaining layer is placed on a surface of the first internal electrode, which is closer to the second internal electrode. The first electrolyte retaining layer retains an electrolyte.
Data Source
AI summary
A power storage device that includes a first adhesive member between a first current collector and a second surface layer, and a second adhesive member between a second current collector and a first surface layer. A first electrolyte retaining layer is provided between the first adhesive member and the first current collector. A second electrolyte retaining layer is provided between the second adhesive member and the second current collector.