| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of component items, to enhance voltage detection accuracy, and to ensure wire breakage detection, in the case of voltage detection circuit for a battery pack comprising one or more battery blocks, each of which consists by series-connecting a plurality of battery modules to each other. SOLUTION: In this voltage detecting circuit 2, voltage detection wires 21 to 26 are led out from a plurality of voltage detection points V1 to V6, respectively, of the battery pack 1, one detection wire 23 among them is grounded, and non-grounded voltage detection wires are connected to the grounded wire 23 via voltage-branching wires 31 to 35, respectively. A voltage-dividing resistor is interposed in each of the non-grounded detection wires and branching wires, and the non-grounded detection wires are each connected to an arithmetic circuit 5 via an analog/digital converter 4. The arithmetic circuit 5 computes the voltage of each battery module, based on voltage detection data inputted from the non-grounded detection wires. |
