Battery Parameter Map Updating for Degradation-Aware Management
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Solution Overview
Problem
Existing battery management systems fail to adequately update parameter maps to reflect changes in battery characteristics due to degradation, leading to inaccurate parameter determination and inefficient management.
Innovation Solution
A battery management system and method that updates parameter maps based on the latest values of specific parameters, using a parameter determination logic to correct and expand map values, incorporating a reference and expansion correction coefficient to adjust values in storage locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If parameter maps are not updated based on battery degradation, then the system structure remains simple and stable, but parameter determination accuracy deteriorates
Solution Approach 1:
The parameter map is transformed from a static data structure to a dynamic one that automatically adapts to battery degradation. The system continuously updates the parameter map using real-time battery parameter measurements, allowing the map to evolve with battery aging while maintaining accurate parameter determination without requiring complete remapping
Solution Approach 2:
The parameter map update mechanism uses the battery's own operational data to self-correct and improve its accuracy. The system leverages measured battery parameters (voltage, current, temperature) to automatically update the parameter map without external intervention, making the system self-adapting to degradation
2Measurement precision
If parameter maps are updated frequently to reflect battery degradation, then parameter determination accuracy improves, but calculation load and processing time increase
Solution Approach 1:
Instead of completely remapping the parameter space, the system performs partial updates only in the specific regions where battery degradation has occurred. This selective updating approach maintains accuracy where needed while minimizing unnecessary calculations in unaffected parameter regions
Solution Approach 2:
The system pre-calculates and stores correction values or update rules during battery manufacturing or initial operation. These preliminary preparations enable faster real-time updates by avoiding complex calculations during operational phases, thus maintaining both accuracy and efficiency
Data Source
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AI summary
A battery management system according to the present disclosure includes: memory; and a controller configured to execute a parameter acquisition procedure to determine respective latest values of a first parameter, a second parameter, and a third parameter associated with a current state of a battery. The controller is further configured to: call a parameter map from the memory, the parameter map recording a correspondence relationship of the third parameter relative to the first and second parameters; and execute a map update procedure to update the parameter map based on the respective latest values of the first, second, and third parameters.