Patent ID: 9170305
Filing Date: 2015-10-27
Classification: B60L,G01R,H02J,Y02T

Abstract:
1. A battery management system (BMS) of an electric vehicle having a battery, the BMS comprising: a reference setup unit configured to set a charge completion value used to calculate a state of health (SOH) of the battery, wherein the battery comprises one or more battery packs each including a plurality of battery cells; a charge amount calculation unit configured to calculate an amount actually charged in the battery from a first point in time when charging of the battery begins to a second point in time when the battery charging actually reaches the charge completion value; and an SOH calculation unit configured to calculate the SOH of the battery, while the battery is being charged, wherein the SOH of the battery is calculated based on a ratio of i) the amount actually charged in the battery to ii) a preset charge amount expected to be charged from the first point in time to the second point in time, wherein the charge completion value is a state of charge (SOC) which is lower than 100%, or a voltage of the battery which is lower than the voltage when the battery is fully charged.