CHARGE CONTROLLER OF AUXILIARY BATTERY FOR FUEL BATTERY

摘要

PURPOSE:To suppress the rise of a charging level of an auxiliary battery by detecting the terminal voltage of the auxiliary battery and so controlling charging voltage below a set value. CONSTITUTION:The output power of a fuel battery 1 is supplied to a driving motor driving circuit 3 through a DC/DC converter 4, and excess power is charged in an auxiliary battery 2. A control circuit 5 for controlling the charging level of the battery 2 is provided between the converter 4 and the battery 2, and the output voltage of the converter 4 is so controlled that the charging voltage of the battery 2 does not become a specified value or more.