3D Mesh Electrode Plate for Secondary Battery Conductivity
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Solution Overview
Problem
Existing electrode plates face challenges in achieving a balance between flexibility and electrolyte impregnation, with traditional 2-dimensional current collectors limiting electric conductivity and flexibility, and often resulting in poor performance when formed into thick films.
Innovation Solution
A 3-dimensional mesh structured electrode plate is developed, comprising a metal current collector with a 2-dimensional mesh structure either stacked or folded, and an aluminum oxide portion with pores of specific dimensions to enhance electrolyte impregnation and flexibility, with the active material inserted into the current collector's vacant spaces and coated on its surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional 2-dimensional mesh structure current collector is used, then the structure is simple and easy to manufacture, but the electric conductivity and flexibility are limited
Solution Approach 1:
The patent transforms the traditional 2-dimensional mesh structure into a 3-dimensional mesh structure by stacking multiple 2-dimensional mesh layers or folding a single mesh layer multiple times. This dimensional transformation significantly improves electric conductivity and flexibility while maintaining manufacturing feasibility through conventional stacking or folding processes.
2Stability of the object's composition
If the current collector is made thicker to improve structural stability, then stability is improved, but flexibility and electrolyte impregnation deteriorate
Solution Approach 1:
The current collector is divided into multiple thin mesh layers stacked together or a single mesh layer folded multiple times. This segmentation creates a 3-dimensional structure where each thin layer maintains flexibility while the stacked/folded configuration provides structural stability, effectively resolving the contradiction between thickness-related stability and flexibility.
Solution Approach 2:
By transitioning from a 2-dimensional planar structure to a 3-dimensional mesh structure through stacking or folding, the patent achieves structural stability without increasing the overall thickness in a single direction, thereby maintaining flexibility and enabling better electrolyte impregnation throughout the multi-dimensional structure.
3Stability of the object's composition
If the current collector is made thicker to improve structural stability, then stability is improved, but electrolyte impregnation deteriorates
Solution Approach 1:
The current collector is divided into multiple thin mesh layers stacked together or a single mesh layer folded multiple times. This segmentation creates a 3-dimensional structure where each thin layer maintains flexibility while the stacked/folded configuration provides structural stability, effectively resolving the contradiction between thickness-related stability and flexibility.
Solution Approach 2:
By transitioning from a 2-dimensional planar structure to a 3-dimensional mesh structure through stacking or folding, the patent achieves structural stability without increasing the overall thickness in a single direction, thereby maintaining flexibility and enabling better electrolyte impregnation throughout the multi-dimensional structure.
4Quantity of substance
If a porous structure is introduced to improve electrolyte impregnation, then electrolyte impregnation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes the inherent porosity of mesh structures and enhances it by creating a 3-dimensional configuration through stacking or folding. This approach improves electrolyte impregnation by providing multiple pathways and increased surface area without requiring complex porous material synthesis, thus avoiding excessive manufacturing complexity.
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 3-dimensional mesh structure improves electric conductivity, flexibility, and electrolyte impregnation, enabling the formation of thick film electrode plates with enhanced performance compared to traditional porous current collectors.
Implementation Method 1
An aluminum oxide portion having pores may be formed on a surface of the single metal base or a surface of at least one of the plurality of metal bases. An average diameter of the pores may be in a range of 50 to 100 nm. An average depth of the pores may be in a range of 1/500 to 1/100 of a thickness of the single metal base or the at least one of the plurality of metal bases.
Data Source
AI summary
An electrode plate includes a current collector, the current collector being made of metal and having a 3-dimensional mesh structure, and an active material portion including an active material, the active material portion being inserted into a vacant space in the current collector and coated on top and bottom surfaces of the current collector.