Battery Cell Balancing Method

Optimized Battery Cell Balancing Method Based on Standard Deviation and Balancing Charge Calculation

This technology determines whether to perform balancing based on the standard deviation of the charge levels of all cells within a battery cell module. It calculates an optimized balancing time by determining a target 'balancing charge (Q_b)' that accounts for the charge levels of all cells and the charge transfer efficiency of the circuit.

Conventional balancing techniques typically rely on repetitive charge transfer from the highest cell to the lowest, resulting in low efficiency and significant time requirements to resolve imbalances across multiple cells.

By measuring and sorting the charge levels of all battery cells and calculating a specific target balancing charge (Q_b), this technology provides a distinct competitive advantage in the battery management system market.

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Key Features:

• A step of comparing the standard deviation of the charge levels of all battery cells against a threshold to determine whether to proceed to the next stage or enter standby mode.
• A step of calculating the target balancing charge based on the charge levels of all battery cells and the charge transfer efficiency of the balancing circuit.
• A configuration that performs balancing across all battery cells based on the calculated balancing charge.
• A configuration that determines the optimized balancing time by considering the charge levels of all cells and the charge transfer efficiency of the circuit.

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