Deterioration suppression device for secondary battery and individual deterioration suppression device
This secondary battery degradation suppression device configured to suppress degradation of each of a plurality of batteries connected in series in a power supply includes a plurality of individual degradation suppression devices. Each individual degradation suppression device includes: a voltage measurement section configured to measure DC voltage between terminals of the battery; a comparison section configured to compare measured voltage with a threshold and determine whether the voltage is higher than the threshold; and a discharge section configured to discharge the battery when the comparison section has determined that the voltage is higher than the threshold. The discharge section includes: a discharging circuit connected in parallel to the battery; and a discharge management section configured to control the discharging circuit. The discharging circuit is implemented as a series circuit of a current limiting resistor and a switch.
NTN CORPORATION
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Hiroyuki
Yamada