Charging control system

A charging control system. The system has a function as a switch controller which includes a charge mode judging executor 66, a charging time monitoring executor 68 and a switch controlling executor 72. The executor 66 judges whether present control is a constant current control or a constant voltage control. The executor 68 monitors whether or not a constant current charging time exceeds a threshold time by utilizing a judging result of the executor 66. The executor 72 turns a switch 54 off when a monitoring result of the executor 68 indicates that the constant current charging time exceeds the threshold time.