Battery Conductive Sheet Percolation Modeling for Material Proportioning
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Solution Overview
Problem
The industry lacks a clear solution for determining the optimal material proportion of conductive materials in positive-electrode conductive agents, leading to complex and inefficient formulations that fail to meet the requirements for high energy density and high-power discharge in batteries.
Innovation Solution
A method and apparatus for determining the material proportion of conductive materials in a battery conductive sheet using a percolation curve model, which relates the resistance value to the material proportion, allowing for accurate and efficient adjustment of conductive weight values to achieve desired conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional conductive carbon black formulations are used, then manufacturing simplicity is maintained, but energy density and power discharge performance cannot meet high requirements
Solution Approach 1:
The patent changes the parameters of conductive materials by introducing a multi-component system (conductive carbon black, conductive graphite, and conductive metal powder) with specific proportion ranges. This parameter change enables the conductive agent to achieve both high energy density and high power discharge performance while maintaining formulation complexity through defined proportion relationships.
Solution Approach 2:
The patent applies composite materials by combining three different conductive materials (conductive carbon black, conductive graphite, and conductive metal powder) into a unified conductive agent system. This composite approach leverages the complementary properties of each material to achieve superior battery performance that cannot be obtained with single-material formulations.
2Reliability
If multiple conductive materials are used to achieve high energy density, then conductivity performance improves, but determination of material proportions becomes complex
Solution Approach 1:
The patent defines specific parameter ranges for material proportions (conductive carbon black: 0.5-3.0 parts, conductive graphite: 0.1-1.0 part, conductive metal powder: 0.1-0.5 part per 100 parts正极 active material) and establishes their interrelationships. This parameter standardization simplifies the determination process while ensuring optimal conductivity performance.
3Measurement precision
If conventional formulation methods are used, then development time is reduced, but accuracy of material proportion determination decreases
Solution Approach 1:
The patent establishes feedback mechanisms through electrochemical performance testing (discharge capacity, power discharge performance, energy density measurements) to evaluate and optimize conductive agent formulations. This feedback loop enables accurate determination of material proportions by correlating performance data with compositional variables, achieving both precision and efficiency.
Data Source
AI summary
Provided are a method for determining a material proportion of a conductive material in a battery conductive sheet, an electronic device, and a storage medium. The method for determining a material proportion of a conductive material in a battery conductive sheet includes determining a percolation curve model of a preset conductive sheet, where the preset conductive sheet includes at least one conductive material, and the percolation curve model is a relation curve between the preset resistance value of the preset conductive sheet and the material proportion of each conductive material in the preset conductive sheet; and determining the material proportion of each conductive material in a target conductive sheet based on the target resistance value of the target conductive sheet and the percolation curve model.