| 摘要 |
PROBLEM TO BE SOLVED: To realize discharge monitoring and charge monitoring with a circuit system. SOLUTION: A battery charge/discharge monitoring circuit is provided for each of a first terminal T1 and a second terminal T2 of a current detection resistor connected to a battery 10 for detecting charge current or discharge current of the battery. And it comprises the first terminal capacitor 30a and the second terminal capacitor 30b for generating integrated voltage responsive to the charge and discharge current obtained from the individual terminals; a comparison part 40 for comparing the individual integrated voltages generated by the first and second terminal capacitors with a reference voltage and having respective outputs which change when the individual integrated voltages reach the reference voltage; a terminal-by-terminal output change count difference output part 50 for counting the number of times of change in the output of the comparison part associated respectively with the first and second terminal capacitors, the terminal-by-terminal output change count difference output part outputting the difference between the number of times of change corresponding to the first terminal and the number of times of change corresponding to the second terminal. COPYRIGHT: (C)2005,JPO&NCIPI
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