18760263. BATTERY SYSTEM (TOYOTA JIDOSHA KABUSHIKI KAISHA)
BATTERY SYSTEM
Organization Name
TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor(s)
Hirotsugu Ohata of Susono-shi JP
Shinya Asaura of Numazu-shi JP
BATTERY SYSTEM
This abstract first appeared for US patent application 18760263 titled 'BATTERY SYSTEM
Original Abstract Submitted
The DC power of the battery is converted into AC power by an inverter to drive a motor generator (MG). The control ECU executes the temperature raising control at the time of low temperature of the battery. During the temperature raising control, the control ECU sets the carrier frequency of the inverter to the resonance frequency of the battery circuit including the battery. The frequency of the switching ripple current coincides with the resonance frequency, and the amplitude of the current ripple increases, so that the battery can be efficiently raised in temperature (heated). The sound pressure level increases only in the region of the resonance frequency, and an increase in loudness can be reduced.