| abstract |
An object of the present invention is to improve the charging efficiency of normal charging without limiting the operation of a low-voltage load of an electric vehicle during normal charging. When charging a high-voltage battery of a vehicle, if it is determined in step S1 that it is normal charging, and if it is determined in step S2 that a mode switching target load is not operating, power saving mode transition processing is executed. Is done. As a result, the operation mode of the DCDC converter that steps down the voltage of the high voltage battery and supplies the high voltage to the low voltage battery and the low voltage load is set to a power saving mode that consumes less power than the normal mode. Thereafter, when it is determined in step S5 that the operation for starting the mode switching target load has been performed, the operation mode of the DCDC converter is changed to the normal mode. The present invention can be applied to, for example, a DCDC converter for an electric vehicle. [Selection] Figure 11 |