A battery charging management system for managing charging operations of automated guided vehicles including: a first type of automated guided vehicle that travels in an unpiloted manner by using a first type of mounted battery as a driving source and charges the first type of mounted battery using an automatic battery charger provided in a charging station; and a second type of automated guided vehicle that travels in an unpiloted manner by using a second type of mounted battery as a driving source and charges the second type of mounted battery using the automatic battery charger; characterized in that the second type of mounted battery has a full charge voltage lower than that a full charge voltage of the first type of mounted battery; the automatic battery charger is provided with a first charging controller and a DC power supply, said first charging controller being activated as an automated guided vehicle (1A, 1B) is connected to the automatic battery charger, said first charging controller being configured to monitor the voltage of the battery (B1, B2) during a charging operation, said first charging controller being further configured to control a charging current value and a charging voltage value supplied from the DC power supply to the battery (B1, B2) during a charging operation; the first type of automated guided vehicle is not provided with a controller for controlling a voltage of the first type of mounted battery during a charging operation, and the first type of mounted battery is charged while its voltage is controlled by the first charging controller; the second type of automated guided vehicle is provided with a second battery charging controller, said second charging controller being configured (i) to monitor a voltage of the second type of mounted battery, (ii) to switch ON a charging route between the automatic battery charger and the second type of mounted battery when the voltage of the second type of mounted battery is lower than a predetermined voltage lower than the full charge voltage of the second type of mounted battery, and (iii) to switch off the charging route between the second type of mounted battery an the automatic battery charger when the voltage of the second type of mounted battery during a charging operation reaches a voltage lower than the full charge voltage of the first type of mounted battery and higher than the predetermined voltage. a first type of automated guided vehicle that travels in an unpiloted manner by using a first type of mounted battery as a driving source and charges the first type of mounted battery using an automatic battery charger provided in a charging station; and a second type of automated guided vehicle that travels in an unpiloted manner by using a second type of mounted battery as a driving source and charges the second type of mounted battery using the automatic battery charger; characterized in that the second type of mounted battery has a full charge voltage lower than that a full charge voltage of the first type of mounted battery; the automatic battery charger is provided with a first charging controller and a DC power supply, said first charging controller being activated as an automated guided vehicle (1A, 1B) is connected to the automatic battery charger, said first charging controller being configured to monitor the voltage of the battery (B1, B2) during a charging operation, said first charging controller being further configured to control a charging current value and a charging voltage value supplied from the DC power supply to the battery (B1, B2) during a charging operation; the first type of automated guided vehicle is not provided with a controller for controlling a voltage of the first type of mounted battery during a charging operation, and the first type of mounted battery is charged while its voltage is controlled by the first charging controller; the second type of automated guided vehicle is provided with a second battery charging controller, said second charging controller being configured (i) to monitor a voltage of the second type of mounted battery, (ii) to switch ON a charging route between the automatic battery charger and the second type of mounted battery when the voltage of the second type of mounted battery is lower than a predetermined voltage lower than the full charge voltage of the second type of mounted battery, and (iii) to switch off the charging route between the second type of mounted battery an the automatic battery charger when the voltage of the second type of mounted battery during a charging operation reaches a voltage lower than the full charge voltage of the first type of mounted battery and higher than the predetermined voltage.