| 摘要 |
PROBLEM TO BE SOLVED: To independently on/off control a plurality of battery modules at a low voltage, in a power-supply device including a parallel connection of the battery modules each having an abnormality monitoring function for each cell.SOLUTION: A power-supply device 10 includes a plurality of power-supply units each having a battery module 1 in which a plurality of cells are serially connected, a monitor ECU 2 monitoring abnormality of the battery module 1, a diode 4 connected between a ground terminal of the monitor ECU 2 and a negative terminal of the battery module 1, and switch means 3 connected to the negative terminal of the battery module 1 and a cathode of the diode 4 and on/off controlled by the monitor ECU 2. In the plurality of power-supply units, positive terminals of each of the battery modules 1 are commonly connected, the other ends of each of the switch means 4 are commonly connected, and ground terminals of each of the monitor ECUs 2 are commonly connected. This configuration prevents inflow of a current to the battery module 1 connected to the switch means 3 in an off state, thereby independently on/off controlling each of the switch means 3. |
