Battery Charging System and Battery Charging Method

The present disclosure relates to a battery charging system and a battery charging method, and the battery charging system is connected to a respective positive electrode battery terminal and negative electrode battery terminal of each battery of a plurality of batteries including a first battery and a second battery, and includes a charger configured to supply power, a bypass configured to rotate about a central shaft and configured to provide a power route that connects at least one of the first and second batteries to a respective positive electrode charger terminal and negative electrode charger terminal of the charger, and a processor configured to monitor a respective end voltage between the respective positive electrode battery terminal and negative electrode battery terminal of each battery of the first and second batteries and control a rotation direction and a rotation angle of the bypass.