| 摘要 |
PROBLEM TO BE SOLVED: To enable high-precision voltage detection for each battery cell in a voltage monitoring device supplied with operating power from a battery block including battery cells connected in series.SOLUTION: In a battery monitoring device 500 including a monitoring IC 100 which is supplied with operating power from a battery block 10 including battery cells 21 to 24 connected in series to monitor the voltages of the battery cells 21 to 24, and positive and negative power supply connectors 32, 42 which are respectively provided to positive electrode and negative electrode cableways 31, 41 which are connected to a positive electrode terminal 11 and a negative electrode terminal 13 of the battery block 10 to supply operation power to the monitoring IC 100, the monitoring IC 100 includes a voltage drop detector 200 for detecting the voltage drop of the positive electrode or negative electrode power supply connector 32, 42 when operating current flows through the positive electrode and negative electrode cableways 31, 41, and a controller 300 for determining increase of the resistance of the positive electrode or negative electrode power supply connector 32, 42 on the basis of the voltage value detected by the voltage drop detector 200.SELECTED DRAWING: Figure 1 |
