Battery Deterioration Calculation via Cathode Anode Segmentation
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Solution Overview
Problem
Existing battery deterioration state calculation methods fail to precisely determine which component, the cathode or anode, is deteriorated, as they rely solely on battery capacity evaluation.
Innovation Solution
A calculation method and system that utilize a detection value database for battery charge and voltage data, combined with a function information database for active materials, performing regression calculations to determine the internal resistance and capacity of cathode and anode components, allowing for a more precise assessment of battery deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If battery deterioration evaluation is performed based only on capacity, then the evaluation process is simple, but the precision of deterioration status cannot be grasped (cannot distinguish between cathode and anode deterioration)
Solution Approach 1:
The patent segments the battery evaluation into separate evaluations for cathode and anode by introducing distinct functions: a first function for calculating cathode capacity and a second function for calculating anode capacity. This segmentation allows the system to distinguish deterioration status between different components while maintaining a systematic evaluation process.
Solution Approach 2:
The patent adds a new dimension to battery evaluation by introducing internal resistance as an additional parameter alongside capacity. The evaluation function incorporates both capacity values and internal resistance values to determine deterioration status, transforming the one-dimensional capacity-only evaluation into a multi-dimensional assessment that provides more precise deterioration information.
2Measurement precision
If regression calculation is performed with multiple variables (amount of active materials), then the precision of deterioration calculation is improved, but the calculation complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-storing function information in a database before actual deterioration calculation. The function information databases store the mathematical models and relationships between variables, allowing the regression calculation to proceed more efficiently during actual evaluation without requiring complex real-time computations.
Solution Approach 2:
The patent introduces function information databases as intermediaries between the raw detection data and the final deterioration calculation. These databases store pre-processed function relationships that mediate the complex regression calculation, simplifying the computation process while maintaining high precision through stored mathematical models.
Data Source
AI summary
A calculation method causing a calculation apparatus configured to calculate a voltage of a battery to implement a computation capability includes: referring to a detection value database configured to store a charge amount of a battery and a voltage of the battery, the voltage being generated when the battery is charged, while associating the charge amount of the battery with the voltage of the battery, and a function information database configured to store a function representing a relationship between the voltage and a charge amount of each of a plurality of active materials included in the battery; and performing a regression calculation on the voltage of the battery that is stored in the detection value database, with an amount of the active materials of the function stored in the function information database being set as a variable.