Battery Electrode Pore Analysis for Output and Fast-Charge Estimation
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Solution Overview
Problem
Existing methods struggle to accurately measure and estimate the improved output and rapid charging performance of rechargeable batteries due to variations in measurement conditions, such as output holding time, state-of-charge, cut-off conditions, and temperature, especially when modifying the electrode structure to enhance ion movement speed.
Innovation Solution
An apparatus and method that estimate rechargeable battery performance by comparing the cumulative intrusion value of pores with diameters between 0.1 and 1 micrometer to a volume reference value, using a processor to determine if the battery meets expected output or state-of-charge values, thereby assessing performance without fully assembling the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electrode structure is modified to improve ion movement speed, then the output performance and rapid charging performance are improved, but the measurement of performance improvement becomes difficult and inaccurate due to variations in measurement conditions
Solution Approach 1:
The patent extracts the key performance indicator from complex battery operation to focus specifically on cumulative intrusion value of pores with diameter 0.1-1 micrometer. By isolating this specific pore volume metric, the measurement becomes independent of other varying conditions such as output holding time, SOC, cut-off conditions, and temperature, thereby resolving the measurement accuracy problem while maintaining the ability to assess ion movement speed improvements
Solution Approach 2:
The patent creates a simplified model by using cumulative intrusion value as a proxy indicator for battery performance. Instead of measuring actual battery output under various conditions, it uses the pore volume measurement as a copy that correlates with performance, allowing accurate assessment without the complexity of full battery testing
2Loss of information
If traditional battery output measurement methods are used, then comprehensive performance data can be obtained, but the measurement process becomes complex and time-consuming due to simultaneous voltage and current measurement requirements
Solution Approach 1:
The patent extracts only the essential information needed for performance assessment - the cumulative intrusion value of pores - from the complex battery system. This single parameter measurement replaces the need for simultaneous voltage and current measurements, significantly simplifying the measurement system while retaining the ability to evaluate output performance and rapid charging performance
Solution Approach 2:
The patent replaces the complex electrical measurement system (requiring simultaneous voltage and current measurement) with a simpler structural measurement approach using cumulative intrusion value. This substitution eliminates the need for complex measurement apparatus and procedures while providing comparable or superior performance information
3Adaptability or versatility
If battery performance is measured under various conditions, then comprehensive performance characteristics can be obtained, but the measurement results vary greatly depending on measurement conditions
Solution Approach 1:
The patent extracts a measurement parameter (cumulative intrusion value of pores with diameter 0.1-1 micrometer) that is inherently independent of operational conditions. This extracted metric provides consistent results regardless of output holding time, SOC, cut-off conditions, or temperature, while still reflecting the electrode structure's impact on ion movement and battery performance
Data Source
AI summary
Discussed is an apparatus for estimating a rechargeable battery performance according to an electrode structure and a method thereof and the apparatus for estimating the rechargeable battery performance. The apparatus may include a communication unit that receives a cumulative intrusion value that is a summed value of volumes of entire pores per unit area of a positive electrode from an apparatus for measuring volumes of pores formed in the positive electrode, and a processor that estimates an output performance of a rechargeable battery by comparing the cumulative intrusion value and a volume reference value, wherein the volume reference value is the cumulative intrusion value corresponding to an expected output value required for the rechargeable battery when the rechargeable battery is continuously discharged.