Battery control apparatus and battery control method

摘要

It is intended to prevent degradation of battery cells (cells). A battery control apparatus obtains a cell voltage value of each of the cells (201) (S1), calculates a cell SOC at each of the cells based on the measured cell voltage value (S2), calculates an integrated current value (Ah) by integrating current values of a battery pack (2) configured with a plurality of the cells (201), calculates a cell capacity value of each of the cells (201) based on the integrated current value and the cell SOC (S3), calculates a dischargeable cell capacity value from the cell capacity value and the cell SOC (S4), and controls charging/discharging of the battery pack (2) based on the dischargeable cell capacity value (S5).

主权项

1. A battery control apparatus comprising:
a voltage detection unit that measures a voltage of each of cells; a charging rate calculation unit that calculates a charging rate of each of the cells based on the measured voltage and a charging-rate to voltage table which is stored in a storage unit; a current integration unit that calculates an integrated current value by integrating current values of a battery pack configured with a plurality of the cells; a cell capacity estimation unit that calculates a battery capacity value of each of the cells based on the integrated current value, and the charging rate of each of the cells; a dischargeable capacity value calculation unit that calculates a dischargeable capacity value of each of the cells from the battery capacity value and charging rate thereof; and a control unit that controls charging or discharging of the battery pack based on the dischargeable capacity value of each of the cells a remaining capacity comparison unit that compares the dischargeable capacity value and a predetermined target remaining capacity value, wherein the control unit, as a result of the comparison between the dischargeable capacity value and the target remaining capacity value, discharges a cell having the dischargeable capacity value larger than the target remaining capacity value until the dischargeable capacity value reaches the target remaining capacity value.