Battery Module Capacity Correction Using Dynamic Voltage Ranges
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Solution Overview
Problem
Conventional battery management systems inaccurately calculate battery capacity due to performance disparities among different batches of cells, leading to inconsistent capacity and reduced energy efficiency, which compromises the state of charge (SOC) and user experience.
Innovation Solution
A method and apparatus for correcting battery module capacity by setting dynamic voltage ranges for fully discharging and charging, recording initial and final charging capacities, and filtering these values to determine a corrected capacity, ensuring consistency across modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If battery capacity is calculated based on the entire battery pack including all modules, then the calculation process is simple, but capacity consistency deteriorates due to performance disparities among different batches of cells
Solution Approach 1:
The patent divides the battery pack into multiple battery modules and calculates capacity for each module separately rather than treating the entire pack as a single unit. This segmentation allows for individual capacity assessment of each module, improving capacity consistency while maintaining manageable calculation complexity through modular processing.
2Manufacturing precision
If capacity management is performed at battery module level to improve capacity consistency, then capacity consistency improves, but the total capacity of the battery pack is restricted and device complexity increases
Solution Approach 1:
The system segments capacity management into modular operations where each battery module is managed independently through standardized procedures. This allows parallel processing of multiple modules, improving capacity consistency while controlling overall system complexity through modular architecture.
Solution Approach 2:
The patent implements a universal capacity management framework that applies the same management logic and calculation methods across all battery modules regardless of their individual characteristics. This multi-functional approach ensures consistent capacity management across diverse modules while using a single standardized system, preventing complexity multiplication.
3Measurement precision
If dynamic voltage ranges are introduced for fully discharging and charging to improve capacity correction accuracy, then measurement precision improves, but device complexity and calculation complexity increase
Solution Approach 1:
The patent introduces dynamic voltage ranges as adjustable parameters that define the boundaries for fully discharged and charged states. By changing the voltage parameter thresholds dynamically rather than using fixed values, the system achieves higher capacity measurement accuracy. The complexity is managed by implementing these parameter changes through software algorithms rather than hardware modifications.
Data Source
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AI summary
A method and apparatus for correcting a capacity of a battery module and a computer device are provided. The method includes: obtaining a discharge voltage value of the battery module; determining the discharge voltage value as an initial voltage indicator if it is within a dynamic voltage range of fully discharging; obtaining an initial charging capacity corresponding to the initial voltage indicator; obtaining a charging voltage value; determining the charging voltage value as a final voltage indicator if it is within a dynamic voltage range of fully charging; obtaining a final charging capacity corresponding to the final voltage indicator; determining a total capacity based on the initial and final charging capacity; and correcting the capacity based on the total capacity to obtain a corrected capacity of the battery module. This method ensures the consistency of the capacity of each module in the system and improves the user experience.