Patent ID: 7518375
Filing Date: 2009-04-14
Classification: B60L,G01R,H01M,H02J,Y02E,Y02T

Abstract:
1. A method of estimating a maximum output of a battery for a hybrid electric vehicle comprising steps of: extracting maximum charge or discharge outputs of the battery depending on a plurality of charged states (SOC) of the battery under which the vehicle is able to be driven and calculating an interrelation between them; extracting maximum charge or discharge outputs of the battery at plural temperatures (temp) under which the vehicle is able to be driven, and calculating an interrelation between them; extracting degradations of outputs of the battery as a capacity of the battery is discharged (accumulated discharge Ah) during traveling, and calculating an interrelation between them; and based on the interrelations obtained from each of the steps, estimating a maximum output (Power wherein F(accumulated discharge Ah)=C k is a discharged capacity of the battery, is within a range of [0, 300000] and is inputted with a modified value within a range of [−1, 1] when it is inputted as an input value into the function.