Battery Regenerability Assessment Using Electrode Potential Estimation
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Solution Overview
Problem
Determining whether a used battery is regenerable without separating its electrode active materials from the electrode group is challenging, as existing methods require assessing the battery's internal state, particularly the positive and negative electrode capacities and the shift of the operation window, to decide on reuse or recycling effectively.
Innovation Solution
A processing method and system that analyze measurement data from the battery, including current and voltage changes, to estimate the internal state parameters, allowing for the determination of whether the battery can be reused by adjusting the electrode potentials or if the electrode materials need to be separated and recycled based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the battery is reused without separating the electrode active material from the electrode group, then the productivity and cost-effectiveness are improved, but the determination of regenerability becomes complex and requires precise measurement of internal state parameters
Solution Approach 1:
The patent replaces complex physical/chemical analysis methods with electrical measurement methods. By measuring electrical parameters (voltage, current, impedance) during charge-discharge cycles, the system can determine internal state parameters (electrode capacities, operation window shifts) without physically disassembling or chemically analyzing the battery. This substitution of mechanical/chemical systems with electrical measurement systems resolves the contradiction by simplifying the determination process while maintaining accuracy.
Solution Approach 2:
The patent introduces electrical parameters as intermediary variables that mediate between the external observer and the internal state of the battery. By measuring voltage, current, and impedance responses during standardized charge-discharge cycles, the system indirectly determines internal state parameters (positive electrode capacity, negative electrode capacity, operation window shift) without direct access to the electrode materials. This intermediary measurement approach enables complex internal state assessment through relatively simple electrical measurements.
2Reliability
If the internal state parameters are accurately measured to determine regenerability, then the reliability of reuse decision is improved, but the measurement precision requirements increase the difficulty of detection and measurement
Solution Approach 1:
The patent applies preliminary action by performing standardized charge-discharge cycles before making the reuse determination. The measurement process involves charging the battery to a predetermined voltage, discharging it through a specified protocol, and then measuring the voltage response during a rest period. These preliminary standardized operations prepare the battery in a known state and elicit characteristic responses that reveal the internal state parameters, making the subsequent measurement task more straightforward and reliable.
Solution Approach 2:
The patent utilizes parameter changes during the charge-discharge cycles to extract internal state information. By varying current rates, voltage thresholds, and rest periods in the measurement protocol, the system observes how the battery responds under different conditions. The changes in voltage, current, and impedance parameters during these controlled variations reveal information about electrode capacities and operation window shifts, transforming a difficult direct measurement problem into a series of manageable parameter observations.
Data Source
AI summary
In an embodiment, in a processing method for a battery, whether a target battery is regenerable without separating an electrode active material serving as a positive electrode active material and an electrode active material serving as a negative electrode active material of the target battery from an electrode group, based on the analysis result of measurement data for the target battery.