Battery Cell Balancing Using System Load to Cut Energy Loss

Instead of discharging the higher-voltage cell through traditional passive (resistive) or active (to capacitor) methods, the patent inverts the approach by charging the lower-voltage cell to match the higher-voltage cell. This is achieved by identifying the lowest-voltage cell and directing charge current to it until its voltage equals that of the highest-voltage cell, thereby eliminating the need to waste energy discharging the higher-voltage cell.

The patent converts the harmful effect of voltage imbalance into a beneficial process by using the voltage difference itself as the driving force for charging the lower-voltage cell. The system monitors individual cell voltages and directs charge current preferentially to lower-voltage cells, transforming the voltage disparity from a problem into the mechanism for achieving balance without generating harmful heat.

The patent extracts and eliminates the root cause of heat generation during balancing by removing the need for traditional balancing methods. By implementing a charge-based balancing approach where current is directed to lower-voltage cells rather than discharging higher-voltage cells through resistors or capacitors, the system eliminates the harmful heat generation that would otherwise require active cooling systems, thereby avoiding additional energy consumption.