Electrochemical Model Simulation for Lithium Battery Data Generation
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Solution Overview
Problem
The practical application of electrochemical models for lithium ion batteries is limited due to the involvement of complex coupled partial differential equations and numerous physical parameters, which hinders the effective management of battery operations by Battery Management Systems (BMS).
Innovation Solution
A method is developed to simulate a data set based on an electrochemical model by setting geometric and electrochemical parameters, generating volume average concentrations of lithium ions, calculating battery capacity, and adjusting the current state of charge, allowing for the generation of simulated data sets under various operating conditions, including different temperatures and states of charge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrochemical models are used to manage battery operations, then the ability to reflect internal battery states is improved, but the complexity of the model increases due to coupled partial differential equations and numerous physical parameters
Solution Approach 1:
The patent segments the complex electrochemical model into multiple sub-models, each handling specific aspects of battery behavior. This division reduces the computational complexity of individual models while collectively maintaining the ability to reflect internal battery states accurately.
Solution Approach 2:
The patent introduces an intermediary layer between the complex electrochemical model and the BMS. This intermediary processes and simplifies the data from the electrochemical model, making it more manageable for practical BMS applications while preserving the detailed internal state information.
2Reliability
If electrochemical models with numerous physical parameters are used, then the predictive capability is improved, but the ease of operation deteriorates due to the difficulty in managing and adjusting parameters
Solution Approach 1:
The patent performs preliminary actions by pre-processing and organizing the numerous physical parameters before they are used in the electrochemical model. This includes parameter normalization, grouping related parameters, and establishing default values, which significantly reduces the operational burden on the BMS.
Solution Approach 2:
The patent implements self-service mechanisms where the system automatically adjusts and optimizes parameters based on operating conditions without requiring manual intervention. The model self-calibrates using historical data and real-time measurements, maintaining high predictive capability while simplifying operation.
3Reliability
If complex electrochemical models are implemented in BMS, then the management capability of battery working status is improved, but the computational requirements and processing time increase
Solution Approach 1:
The patent implements dynamic adjustment of model complexity based on operating conditions. During normal operation, simplified models are used for fast processing. When detailed analysis is required or conditions change, the system dynamically switches to more complex models, optimizing the balance between management capability and processing time.
Solution Approach 2:
The patent applies partial action by selectively activating only the necessary sub-models or parameter sets based on current battery operating conditions. This approach maintains adequate management capability for most scenarios while reducing computational burden by avoiding unnecessary calculations.
Data Source
AI summary
The invention discloses a method, a system, and a storage medium for simulating a data set based on an electrochemical model. The method includes the following steps: setting geometric parameters and electrochemical parameters of a lithium battery; generating a volume average concentration of positive lithium ions and a volume average concentration of negative lithium ions under a preset state of charge through a simulation of the electrochemical model; calculating a capacity of the lithium battery through the simulation of the electrochemical model; after adjusting a current state of charge of the lithium battery, inputting a simulated operating current to acquire a simulated data set. The invention can generate operating data of a virtual battery by adjusting lithium battery electrochemical model parameters, facilitating management by a BMS system of battery operating states based on an electrochemical model of a virtual battery.