| 摘要 |
A voltage measurement device for a battery assembly as is capable of measuring at high precision an output voltage in which a positive voltage and a negative voltage coexist, is provided. A voltage measurement device for a battery assembly, includes voltage level shift circuits (40) which are respectively provided for a plurality of cells (P1 - P55), and which add a predetermined voltage value to the output voltages of the cells, individual voltage detecting ICs which are provided for a plurality of blocks that are obtained by sectioning the individual cells into the blocks each being configured of at least one cell, and which detect addition voltages that are the output voltages of the voltage level shift circuits (40) corresponding to the cells of the individual blocks, A/D converters (26) which are provided for the individual voltage detecting ICs, and which digitize the analog voltage signals of the addition voltages detected by the voltage level shift circuits (40), and a main microcomputer (33) which outputs voltage measurement request signals to the individual voltage detecting ICs and acquires the addition voltages detected by the individual voltage detecting ICs, and which subtracts a predetermined voltage value from the acquired addition voltages and provides voltage values after the subtractions, as the output voltages of the cells. |
