To enable an efficiently and surely warming device while improving a fuel consumption rate in charging a storage battery by using regenerative power.
When an ignition switch is turned on, an HVECU reads a battery temperature, and if the temperature is lower than a prescribed temperature, executes warming control (steps 100, 102). The warming control sets a target capacity of a battery to a target SOCL lower than a normal SOC, if an engine has been started, reads a capacity C of the battery, and if the capacity C is larger than the target SOCL, forcibly discharges the battery (steps 106-118). At this moment, the HVECU charges regenerative power while inhibiting the charge by driving force from the engine. By raising the battery temperature by the heat generation caused from the charge/discharge of the battery, the warming of the battery may be implemented surely and in a short period while improving the fuel consumption rate of the engine.
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda