Battery State Detection Using RCCR Charging Curves
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Solution Overview
Problem
Existing methods for detecting battery safety and health, such as short circuits and aging, require complex probes and significant data modifications, making them inefficient.
Innovation Solution
An electronic device and method utilizing relative cumulative cell resistance (RCCR) curves generated from constant voltage phase data during battery charging to detect aging and shorting conditions, allowing for efficient estimation of state of health (SOH) and state of short (SOS) without extensive data requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex probes and significant data modifications are used for battery detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts and monitors only the critical parameter of cell resistance during charging, rather than using complex probes to measure multiple parameters. By focusing on resistance changes during the constant voltage phase, the system achieves accurate aging and shorting detection with minimal measurement infrastructure.
Solution Approach 2:
The patent replaces physical complex probes with an electrical measurement approach, using standard charging circuitry to infer battery health states through resistance calculations based on voltage and current data already available during normal charging operations.
2Measurement precision
If complex probes and data modifications are used, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The system uses the battery's own charging process to generate detection data. During normal constant voltage charging, the existing current and voltage measurements automatically provide the information needed to calculate cell resistance and detect aging or shorting conditions, eliminating the need for separate detection operations.
3Measurement precision
If extensive data requirements are used, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The system performs detection during the charging process itself rather than requiring separate testing phases. By calculating cell resistance from data collected during the constant voltage phase of charging, the system achieves rapid aging and shorting detection without adding time to the battery's normal operation cycle.
Data Source
AI summary
A method and electronic device with battery state detection are provided. The method includes generating relative cumulative cell resistance (RCCR) curve information of a target battery based on constant voltage (CV) phase data of the target battery recorded during a charging operation of the target battery; and generating at least one of aging or shorting condition information of the target battery based on the generated RCCR curve information.