A driving system of a starting battery, the driving system comprising: one or more battery cells ; a voltage measurement unit configured to measure a voltage of the battery cells ; an overvoltage determination unit configured to compare the voltage measured by the voltage measurement unit with a preset reference voltage to determine whether the battery cells are in an overvoltage state according to a result of comparison; a charging FET , which is configured in a first path that is a main path through which a charging current flow between the battery cells and an external system to control a flow of the charging current; first and second current limiting units , which are configured in a second path through which the charging current flows from the external system to the battery cells and which is formed in parallel with the first path to consume the charging current of the battery cells; a system off determination unit configured to determine an off state of the external system to which the battery cells are connected on the basis of a change in a value of the voltage measured by the voltage measurement unit; and a charging FET control unit configured to control on/off of the charging FET configured in the first path according to determination results from the overvoltage determination unit and the system off determination unit, wherein the voltage measurement unit comprises a first voltage measurement unit and a second voltage measurement unit , wherein grounds GND of the first voltage measurement unit and the second voltage measurement unit are set in different positions, wherein the ground GND of the first voltage measurement unit is positioned in the first path and connected to a cell ground GND, and the ground GND of the second voltage measurement unit is positioned between the first and second current limiting units configured in the second path. one or more battery cells ; a voltage measurement unit configured to measure a voltage of the battery cells ; an overvoltage determination unit configured to compare the voltage measured by the voltage measurement unit with a preset reference voltage to determine whether the battery cells are in an overvoltage state according to a result of comparison; a charging FET , which is configured in a first path that is a main path through which a charging current flow between the battery cells and an external system to control a flow of the charging current; first and second current limiting units , which are configured in a second path through which the charging current flows from the external system to the battery cells and which is formed in parallel with the first path to consume the charging current of the battery cells; a system off determination unit configured to determine an off state of the external system to which the battery cells are connected on the basis of a change in a value of the voltage measured by the voltage measurement unit; and a charging FET control unit configured to control on/off of the charging FET configured in the first path according to determination results from the overvoltage determination unit and the system off determination unit, wherein the voltage measurement unit comprises a first voltage measurement unit and a second voltage measurement unit , wherein grounds GND of the first voltage measurement unit and the second voltage measurement unit are set in different positions, wherein the ground GND of the first voltage measurement unit is positioned in the first path and connected to a cell ground GND, and the ground GND of the second voltage measurement unit is positioned between the first and second current limiting units configured in the second path. <EOS>