Positive Electrode Material Screening for Battery Gas Prediction
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Solution Overview
Problem
Conventional methods for analyzing gas production in lithium secondary batteries are time-consuming and costly, requiring the manufacture of full cells to measure gas production, which complicates the identification of improvement plans for gas production issues affecting battery safety and lifespan.
Innovation Solution
A positive electrode active material with a specific pressure range (0.4 to 0.6 atm/mAh) and a gas analyzing apparatus that allows for the measurement of gas production and components without manufacturing a full cell, using a half-cell charged with predetermined SOC, and a gas analyzing apparatus with a retention portion, pressure measuring sensor, and internal pressure control to predict gas production in lithium secondary batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional gas analysis methods are used (manufacturing full cell, evaluating life and high-temperature storage characteristics, then measuring gas), then gas production can be measured, but the analysis process is time-consuming and costly
Solution Approach 1:
The patent extracts only the positive electrode active material from the complete battery system to perform gas production analysis. By isolating the positive electrode as a standalone component and testing it with electrolyte solution, the method eliminates the need to manufacture and evaluate complete full cells, thereby significantly reducing analysis time and costs while maintaining measurement relevance
Solution Approach 2:
The patent performs preliminary characterization of the positive electrode active material before full battery assembly. By measuring gas production pressure (0.4 to 0.6 atm/mAh) and gas components in advance using only the positive electrode material and electrolyte solution, the method enables early prediction of battery performance and identifies improvement opportunities before committing to full cell manufacturing
2Measurement precision
If conventional gas analysis methods are used (manufacturing full cell, evaluating life and high-temperature storage characteristics, then measuring gas), then gas production can be measured, but the costs are high
Solution Approach 1:
The patent extracts only the positive electrode active material from the complete battery system to perform gas production analysis. By isolating the positive electrode as a standalone component and testing it with electrolyte solution, the method eliminates the need to manufacture and evaluate complete full cells, thereby significantly reducing analysis time and costs while maintaining measurement relevance
Solution Approach 2:
The patent uses a simplified, disposable test setup consisting of only the positive electrode active material and electrolyte solution in a controlled environment. This minimalistic approach replaces expensive, complex full battery manufacturing and testing infrastructure, enabling cost-effective gas production analysis that can be performed repeatedly with small material quantities
3Measurement precision
If conventional gas analysis methods are used (manufacturing full cell, evaluating life and high-temperature storage characteristics, then measuring gas), then gas production can be measured, but it is difficult to identify improvement plans
Solution Approach 1:
The patent extracts only the positive electrode active material from the complete battery system to perform gas production analysis. By isolating the positive electrode as a standalone component and testing it with electrolyte solution, the method eliminates the need to manufacture and evaluate complete full cells, thereby significantly reducing analysis time and costs while maintaining measurement relevance
Solution Approach 2:
The patent segments the battery system into its component parts, focusing specifically on the positive electrode active material as the source of gas production. By analyzing this segment independently rather than testing the entire integrated battery system, the method enables precise identification of which component (positive electrode material) causes gas production issues and what specific improvements are needed
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
Enables the prediction of gas production and components in lithium secondary batteries within a short time and reduced costs, ensuring battery safety and performance by analyzing the positive electrode active material and electrolyte solution interaction.
Implementation Method 1
gas produced by a reaction with an electrolyte solution
Implementation Method 2
pressure of gas produced by the positive electrode active material
Data Source
AI summary
A positive electrode active material has a pressure of gas produced by a reaction with an electrolyte solution of 0.4 to 0.6 atm/mAh. The positive electrode active material according to the present disclosure allows prediction of an amount of gas produced and gas components in a secondary battery cell without actually manufacturing a secondary battery cell. In addition, a process from sample preparation to measurement completion, which is required for measuring an amount of gas produced, may be performed within a short time.