| 摘要 |
A secondary battery voltage detecting system includes: a battery group in which lithium ion secondary batteries are connected in series; a charging and discharging switch that is connected between the battery group and an output terminal and performs charging and discharging; abnormality detectors that divide the batteries of the battery group into blocks and that detect battery voltages; a CPU that performs arithmetic processing of respective detection signals of protection elements including the abnormality detectors; first voltage level converters that make voltage references of the detection signals uniform between the protection elements and the CPU; and second voltage level converters connected between the abnormality detectors and the first voltage level converters. The CPU outputs, at a time interval set in advance, a signal for causing the second voltage level converters to operate and electrically isolates or connects paths between the detectors and the first voltage level converters. |
