Apparatus and method for estimating state of charge of battery

摘要

Provided are battery SOC estimating apparatus and method. The battery SOC estimating apparatus according to the present invention includes a first SOC calculating unit which applies a predetermined parameter to calculate a first state of charge (SOC) of a battery; one or more second SOC calculating units which individually apply different parameters to calculate one or more second SOCs of the battery; and an optimal parameter extracting unit which confirms a second SOC which is the closest to an actual SOC of the battery from one or more second SOCs to extract a parameter which is applied to the second SOC which is the closest to the actual SOC as an optimal parameter, in which the first SOC calculating unit applies the optimal parameter to calculate a final SOC of the battery.

主权项

1. A charging estimating apparatus for calculating a battery state, the apparatus comprising:
a first SOC calculating unit which applies a predetermined parameter to calculate a first state of charging (SOC) of a battery; one or more second SOC calculating units which individually apply different parameters to calculate one or more second SOCs of the battery; and an optimal parameter extracting unit which confirms a second SOC which is the closest to an actual SOC of the battery from one or more second SOCs to extract a parameter which is applied to the second SOC which is the closest to the actual SOC as an optimal parameter, wherein the first SOC calculating unit applies the optimal parameter to calculate a final SOC of the battery, and wherein, when a current which flows in the battery is equal to or lower than a predetermined value for a time that is equal to or longer than a predetermined time, the optimal parameter extracting unit determines a voltage value at the time as an open circuit voltage (OCV) of the battery and calculates the actual SOC of the battery using the OCV.