Battery Cell Voltage Detection with Impedance Correction

The impedance values of conductive wires are pre-stored in a memory unit before voltage detection occurs. When voltage detection is needed, the system retrieves these pre-stored impedance values and uses them to correct the measured voltage, eliminating the need for real-time impedance measurement while maintaining high precision.

The patent introduces an intermediary correction mechanism that uses pre-stored impedance data to adjust the raw voltage measurement. The controller calculates corrected voltage by combining the measured voltage with impedance-based correction values, thereby eliminating measurement errors without complicating the detection process.

Impedance values are pre-measured and stored in memory before the detection system operates. This preliminary action transfers the complexity from the real-time detection process to an initial setup phase, allowing the operational system to remain simple while achieving high precision through data retrieval and calculation.

The system uses its own internal memory to store and retrieve impedance data, and its own processor to perform correction calculations. This self-service approach eliminates the need for external complex measurement devices or additional sensors, maintaining system simplicity while improving precision.

The impedance correction data is prepared in advance and stored in memory. During SOC calculation, the system simply retrieves this pre-prepared data and performs a straightforward calculation, maintaining high processing speed while improving accuracy through the use of corrected voltage values.

The patent replaces complex real-time impedance measurement mechanisms with a simpler data retrieval and calculation approach. By substituting physical measurement with computational correction using pre-stored data, the system achieves both high speed and high accuracy in SOC calculations.