A strategy for maintaining the charge status of a low voltage battery pack in a hybrid electric vehicle having high voltage drive battery series

摘要

An electric hybrid vehicle (12) has an internal combustion engine (14), a high-voltage battery bank (28), a low-voltage battery grater (30), an electric generator (32) which is operated by the internal combustion engine (14) for charging the battery bank (30) is driven, a DC / DC converter (46) for recharging the battery bank (30) by the battery bank (28), a control device for displaying the voltage of the battery bank (30), a recharge trigger timer on which, while the battery bank (28) and not the generator (32) recharges the battery bank (30) by means of the converter (46), started by the controller, which indicates that the voltage of the battery bank (30) is below a recharge trip limit and its duration is a function of the voltage displayed by the recording equipment while the timer expires. When the timer expires to a recharge trip limit, the generator begins recharging the battery bank (30).