Battery Resistance Profiling Across SOC Rest Periods

The patent applies periodic action by implementing alternating charging periods and resting periods in a cyclic manner. During resting periods, the battery is allowed to rest without charging current, creating periodic intervals where stable voltage measurements can be taken. This periodic structure enables accurate resistance measurement during low-activity phases while maintaining overall charging functionality, thereby improving measurement precision without requiring additional measurement devices.

The patent applies preliminary action by performing voltage measurements during resting periods before the next charging period begins. This timing ensures that voltage stabilizes after charging interruptions, allowing accurate baseline measurements to be taken in advance. The resistance calculation is then performed using these pre-measured stable voltage values, improving diagnostic accuracy without adding measurement complexity.

The patent applies continuity of useful action by performing resistance calculations continuously at each resting period throughout the charging process. Instead of conducting a separate comprehensive test, the system continuously accumulates resistance data at multiple SOC points during normal charging operations. This approach maintains diagnostic precision across the entire charging cycle without adding extra time, as measurements are integrated into the existing charging workflow.

The patent applies self-service by utilizing the battery's own charging and resting cycles to generate measurement opportunities. The charging system naturally creates resting periods during which voltage measurements are taken, and resistance calculations are performed using the battery's inherent operational patterns. This eliminates the need for separate dedicated measurement sessions, achieving comprehensive multi-point assessment without extending total charging time.

The patent applies parameter changes by dynamically adjusting the duration and frequency of resting periods based on charging progress and battery characteristics. The system modifies these parameters to optimize the balance between measurement accuracy and charging efficiency. By carefully controlling resting period lengths and intervals, the system achieves reliable resistance calculations without excessive delays, maintaining productivity while improving diagnostic reliability.

The patent applies partial action by implementing resting periods at strategically selected charging stages rather than continuously. The system performs resistance calculations at key SOC points during charging, taking measurements during selected resting periods without requiring complete charging interruptions. This partial approach achieves sufficient diagnostic reliability for battery state determination while minimizing impact on overall charging productivity.