CHARGING EQUIPMENT FOR SECONDARY-BATTERY PACK

摘要

PROBLEM TO BE SOLVED: To provide charging equipment preventing the abnormal temperature rise of a secondary battery during a charging and being capable of completing the charging of the secondary battery in a short time. Ž

SOLUTION: A charging control section 12 controlling a charging current has a temperature monitor section 13 monitoring the temperature of the secondary battery 21 and a charging stop section 14 stopping the supply of the charging current when the temperature of the secondary battery 21 is increased to a first set temperature T1or higher. An input terminal TINfor the temperature monitor section 13 is connected at an output terminal T22for a thermistor 22 detecting the temperature of the secondary battery 21, and a ground terminal TGNDfor the temperature monitor section 13 is connected to a line 17 making the charging current flow. The ground terminal T21for the thermistor 22 is connected at the ground terminal T11for the charging equipment 10. A voltage VRbetween a connection point A for the ground terminal TGNDfor the temperature monitor section 13 and the ground terminal T11for the charging equipment 10 is applied as a differential voltage ΔV to an output voltage VTHAfrom the thermistor 22 in an input voltage VINto the temperature monitor section 13. Ž

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