SECONDARY BATTERY MONITORING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a secondary battery monitoring device capable of improving the accuracy of an integrated value of a charge/discharge current flowing from a secondary battery.SOLUTION: A secondary battery monitoring device 10 for detecting a charge/discharge current of a secondary battery 1 and calculating the charging rate of the secondary battery 1 by determining an integrated value of the charge/discharge current by using a computing unit 17 comprises: an amplifier 15 for amplifying an analog signal of the detected current; an A/D converter 16 for converting an analog signal into a digital signal to supply the signal to the computing unit 17; and a trigger circuit 18 in which the analog signal of the detected current is set as input, with quicker responsiveness than that of the A/D converter 16. A plurality of power operation modes of the secondary battery monitoring device 10 corresponding to the current of the secondary battery 1 are switched on the basis of the level of the input, by a signal outputted from the trigger circuit 18.