STORAGE BATTERY HYSTERESIS VOLTAGE ESTIMATING DEVICE, STORAGE BATTERY REMAINING LIFE ESTIMATING DEVICE USING THE SAME, AND STORAGE BATTERY MANAGEMENT SYSTEM

摘要

To obtain a storage battery hysteresis voltage estimating device with which it is possible to estimate the hysteresis voltage of a storage battery with good accuracy.SOLUTION: The storage battery hysteresis voltage estimating device comprises: a current measurement unit; a voltage measurement unit; an SoC estimation unit; a mole fraction storage unit for storing a first variable group that is the mole fraction of an electrode substance in each stage at charge time of a storage battery and a second variable group that is a mole fraction at discharge time; a transition probability calculation unit for calculating, from the current value and the first and second variable groups, as first coefficient group of proportionality coefficients representing individual charge time transition probability between the first and the second variable groups at charge time, and calculating a second coefficient group of proportionality coefficients representing individual discharge time transition probability at discharge time; a mole fraction calculation unit for calculating a new first and a new second variable group at the current time from the first or the second coefficient group in addition to the first and the second variable groups; and a hysteresis voltage calculation unit for calculating a hysteresis voltage from the voltage determined using the ratio of the sum total of the new first variable group to the sum total of the new second variable group and the SoC.SELECTED DRAWING: Figure 5