| 摘要 |
PROBLEM TO BE SOLVED: To perform diagnostics of an inter-terminal voltage measurement circuit for a secondary battery at high speed.SOLUTION: A battery-system monitoring device, having a cell group in which a plurality of unit battery cells are serially connected, includes: a first control device provided corresponding to the cell group; a plurality of voltage detection lines connecting a positive electrode and a negative electrode of each battery cell and the first control device, and provided for inputting an inter-terminal voltage of each unit battery cell to the first control device; and a power supply line supplying an inter-terminal voltage of the cell group to the first control device. The first control device includes a power-supply section, a voltage input section inputting the inter-terminal voltage of the cell group, a voltage measurement section measuring a voltage, and a selection section selecting an output from the voltage input section and inputting the output to the voltage measurement section. The power-supply line is connected to a positive electrode of the top level unit battery cell. The inter-terminal voltage of the cell group is inputted to the power-supply section via the power-supply line, and the power-supply section has a conducting switch for supplying the inter-terminal voltage of the cell group to the voltage input section. |
