BATTERY MANAGING DEVICE, BATTERY MONITORING CIRCUIT, CONTROL SYSTEM

摘要

In the present invention, a cell voltage is measured immediately after completion of a diagnosis on a cell voltage detecting function. In a battery managing device 10, a voltage detecting unit 140 detects respective terminal voltages of battery cells 21 and 22. An RC filter 110 is electrically connected to voltage detecting lines L1, L2, and L3, and a status change causing unit 130 causes an electrical status change in the voltage detecting lines L1, L2, and L3. A voltage fluctuating unit 120 fluctuates the terminal voltages of the battery cells 21 and 22 in response to the electrical status change caused by the status change causing unit 130. A microcomputer 150 diagnoses the voltage detecting unit 140 on the basis of the detection results on the terminal voltages of the battery cells 21 and 22 by the voltage detecting unit 140 when the voltage fluctuating unit 120 fluctuates the terminal voltages of the battery cells 21 and 22.