Electrode Body Through-Hole Layout for Electrolyte Permeation
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Solution Overview
Problem
Conventional energy storage devices face challenges in allowing electrolyte solution to permeate the electrode body effectively due to insulating sheets blocking the path during electrolyte injection, leading to difficulties in permeation.
Innovation Solution
Incorporating a sheet-shaped porous body with lower air permeability than the separator between the electrode body and the container, and providing through holes in the electrode plate, allowing the electrolyte solution to permeate while maintaining insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating sheet is provided between the electrode body and the container, then the electrode body and the container are insulated from each other, but the insulating sheet blocks the path for the electrolyte solution during injection, making it difficult for the electrolyte solution to permeate the electrode body
Solution Approach 1:
The patent applies a porous insulating sheet that allows the electrolyte solution to permeate through it while maintaining electrical insulation between the electrode body and the container. The porous structure enables fluid passage while the material properties maintain electrical isolation, thus resolving the contradiction between insulation and permeation.
2Ease of operation
If air passages are formed in the electrode body, then the electrolyte solution can easily permeate the electrode body, but the insulating sheet still blocks the path during electrolyte injection
Solution Approach 1:
The porous insulating sheet acts as an intermediary element between the container and the electrode body. It mediates the electrolyte injection process by allowing the electrolyte to pass through to the air passages while maintaining insulation, thus enabling permeation without directly connecting the container and electrode body.
3Ease of operation
If the insulating sheet has high air permeability, then the electrolyte solution can permeate easily, but the insulation performance between electrode body and container deteriorates
Solution Approach 1:
The insulating sheet is designed with specific local properties: it is porous to allow electrolyte permeation while maintaining electrical insulation. The local quality of the material - its porosity and electrical resistance - is optimized to simultaneously achieve both permeation and insulation functions in different aspects.
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 electrolyte solution can easily permeate the electrode body, reducing the risk of short circuits and ensuring efficient impregnation, even in elongated electrode bodies, by using a porous body with controlled air permeability and through holes in the electrode plate.
Implementation Method 1
a sheet-shaped porous body provided with an insulating property and between the electrode body and the container... the porous body has lower air permeability than the separator... the electrolyte solution can easily permeate the electrode body
Data Source
AI summary
An energy storage device includes an electrode body in which an electrode plate and a separator are stacked, an electrolyte solution, a container to accommodate the electrode body and the electrolyte solution, and a sheet-shaped porous body provided with an insulating property and between the electrode body and the container. A through hole is provided in the electrode plate.