Patent ID: 6118237
Filing Date: 2000-09-12
Classification: B60K,B60L,H02J,Y02T,Y10S

Abstract:
A hybrid drive system for a vehicle, comprising;a battery;an electric motor powered by said battery;sensors to sense parameters indicative of a state of said battery; anda controller to input information of battery temperature of said battery and information of a state of charge (SOC) of said battery from said sensed parameters indicative of the state of said battery,said controller being operative to conduct a forced discharge from said battery by establishing supply of electric energy from said battery to said electric motor when the battery temperature is less than or equal to a predetermined temperature value and the state of charge (SOC) of said battery is greater than or equal to a predetermined SOC value,said controller being operative to conduct a forced charge to said battery from said electric motor by establishing supply of electric energy to said battery from said electric motor when the battery temperature is less than or equal to said predetermined temperature value and the state of charge (SOC) of said battery is less than said predetermined SOC value.