| 摘要 |
PROBLEM TO BE SOLVED: To efficiently charge batteries with regenerative energy that an alternator generates, without using a DC/DC converter in a hybrid automobile in which a plurality of batteries with different rating voltages are mounted.SOLUTION: In a battery 2 of which the rating voltage is 12 V and a battery 3 of which the rating voltage is 48 V, battery controllers 2a and 3a are provided together and a battery state is detected in a predetermined sampling cycle. In a charge control part 6, an SOC calculation part 6a estimates an SOC of each of the batteries based on each of battery states. Based on the estimated SOC of each of the batteries, a battery selection part 6b selects a battery subjected to regenerative charge and notifies a charge path selector 7 of a selection result. A variable voltage setting part 6c sets an output voltage corresponding to the rating voltage of the selected battery to a variable voltage alternator 1. The charge path selector 7 sets up a path for regenerative charge between the variable voltage alternator 1 and the selected battery.SELECTED DRAWING: Figure 1 |
