Toyota jidosha kabushiki kaisha (20250115164). BATTERY SYSTEM
BATTERY SYSTEM
Organization Name
toyota jidosha kabushiki kaisha
Inventor(s)
Shinya Asaura of Numazu-shi JP
Hirotsugu Ohata of Susono-shi JP
Takahiro Iwamura of Kariya-city JP
BATTERY SYSTEM
This abstract first appeared for US patent application 20250115164 titled 'BATTERY SYSTEM
Original Abstract Submitted
direct-current power of a battery is converted to alternating-current power by an inverter to drive a motor generator. a control ecu executes temperature raising control when the battery is at a low temperature. during the temperature raising control, the control ecu superimposes a current ripple for raising the temperature of the battery on a d-axis current command value. a frequency of the current ripple (ripple frequency) varies randomly around a resonance frequency of a battery circuit including the battery. additionally, a carrier frequency of the inverter varies randomly. as a result, a sound pressure level can be suppressed in regions of the resonance frequency and the carrier frequency during the temperature raising control.