BATTERY CONTROL SYSTEM FOR HYBRID VEHICLE AND METHOD FOR CONTROLLING A HYBRID VEHICLE BATTERY

摘要

A battery control system (10) for hybrid vehicle includes a hybrid powertrain battery (16), a vehicle accessory battery (20), and a prime mover driven generator (22) adapted to charge the vehicle accessory battery (20). A detecting arrangement (26) is configured to monitor the vehicle accessory battery's state of charge. A controller (32) is configured to activate the prime mover (12) to drive the generator (22) and recharge the vehicle accessory battery (20) in response to the vehicle accessory battery's state of charge falling below a first predetermined level, or transfer electrical power from the hybrid powertrain battery (16) to the vehicle accessory battery (20) in response to the 'vehicle accessory battery's state of charge falling below a second predetermined level. The invention further includes a method for controlling a hybrid vehicle powertrain system (10).