Patent ID: 9083194
Filing Date: 2015-07-14
Classification: B60L,B65G,G03C,H02J,Y02E,Y02T,Y04S

Abstract:
1. A battery charging system, comprising: a connector for connecting to an external power source so as to receive electric power; a first battery unit for storing electric power to be supplied to a driving system of a train; a second battery unit for storing electric power to be supplied to the first battery unit; a control unit for calculating electric power consumption from the first battery unit; and a battery charging unit for supplying electric power to the first battery unit; wherein the control unit controls the battery charging unit to supply a predetermined amount of electric power from the external power source to the first battery unit when the connector establishes a connection to the external power source; and wherein the control unit controls the battery charging unit to supply the electric power to the first battery unit from the second battery unit when the control unit determines that the first battery unit has consumed a predetermined amount of electric power.