Fecha de publicación: 16/06/2022 Fuente: Wipo "BigData" A system for estimating a charging time of a battery includes: a big data server that receives charger information that is identification information of a connected external charger, information on an area where the external charger is located, or information on a type of charging power supplied from the external charger, along with a first estimated charging time and an actual charging time of the battery, calculates an error between the first estimated charging time and the actual charging time, and calculates an estimated charging time correction value according to the charger information and the error; and a charging controller that calculates a second estimated charging time based on a state of the battery, and receives the estimated charging time correction value from the big data server and applies the received estimated charging time correction value to the second estimated charging time to calculate the first estimated charging time.