Secondary Battery Simulation With Hysteresis Voltage Correction
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Solution Overview
Problem
Existing methods for simulating secondary battery charging and discharging behavior, such as electrochemical modeling, fail to accurately reflect the hysteresis phenomenon, which affects performance and accuracy.
Innovation Solution
A method combining electrochemical modeling with hysteresis modeling to correct simulation results, using Doyle-Fuller-Newman modeling and equations 1 to 6, and applying hysteresis correction through Equation 6 to align with actual battery behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrochemical modeling is used to simulate charging and discharging behavior, then accuracy is improved, but the hysteresis phenomenon is not reflected
Solution Approach 1:
The patent merges electrochemical modeling with hysteresis modeling into a unified simulation framework. The electrochemical model (Doyle-Fuller-Newman) provides the base simulation of charging/discharging behavior, while the hysteresis model (Jiles-Atherton) is integrated to correct voltage predictions and accurately reflect the hysteresis phenomenon, resolving the contradiction between accuracy and hysteresis reflection.
Solution Approach 2:
The patent introduces a hysteresis correction module as an intermediary between the electrochemical model and the final simulation results. This intermediary component takes the voltage output from electrochemical modeling and applies hysteresis correction based on the Jiles-Atherton model, ensuring that the hysteresis phenomenon is properly reflected while maintaining the accuracy benefits of electrochemical modeling.
2Measurement precision
If electrochemical modeling is used, then high accuracy is achieved, but calculation complexity increases
Solution Approach 1:
The patent segments the simulation process into two distinct modules: electrochemical modeling for capturing fundamental battery behavior and hysteresis modeling for correcting specific voltage deviations. This segmentation allows each module to be optimized independently, maintaining high accuracy while managing calculation complexity through modular architecture.
Solution Approach 2:
The patent applies partial action by using electrochemical modeling only for the core charging/discharging behavior simulation, and then applying a simpler hysteresis correction model only for the specific voltage offset correction. This avoids the excessive complexity of a fully detailed electrochemical model while maintaining sufficient accuracy for the application.
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 method provides high consistency between simulated and actual battery behavior by correcting hysteresis effects, enhancing accuracy and performance prediction.
Implementation Method 1
The electrochemical modeling method has a disadvantage that a so-called hysteresis of the charging and discharging of the secondary battery is not reflected. The hysteresis of the secondary battery means a difference between voltages occurring when the secondary battery is charged to a certain charging state to reach the state and when it is discharged to reach the state
Data Source
AI summary
A method for simulating charging and discharging behavior of a secondary battery may include simulating the charging and discharging behavior of the secondary battery through electrochemical modeling; and correcting the simulation results from the electrochemical modeling by applying hysteresis modeling to the simulation results.