| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery voltage detection controller capable of detecting overcharge and overdischarge of a cell in a battery pack, and a cell group voltage, by one voltage detecting circuit, and capable of detecting concurrently a disconnection trouble and an off trouble in a circuit for outputting battery information. SOLUTION: In this battery voltage detection controller of the present invention, an output from an overcharge and overdischarge determination circuit 11 for determining the overcharge and overdischarge of the each cell in the cell group CGi is input into a constant current circuit 12 through an inversion OR circuit 14 of a logical sum circuit, and an inversion AND circuit 15 of a logical sum circuit. An overcharge and overdischarge determination signal is output from the constant current circuit 12 to an OCDS output terminal OCDSi as a voltage value of an analog signal. The cell group voltage is output to output terminals VSi, Vsi+1. Voltage values of the two signals are input into a flying capacitor circuit in a following step, so as to detect the overcharge and overdischarge of the cell, the cell group voltage, abnormality in the overcharge and overdischarge determination circuit and the cell group voltage output circuit, based on the detection of respective voltages, by simple constitution. COPYRIGHT: (C)2007,JPO&INPIT
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