BATTERY CONTROL APPARATUS AND BATTERY CONTROL METHOD
First Claim
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;
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.
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Accused Products
Abstract
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).
23 Citations
6 Claims
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1. A battery control apparatus comprising:
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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; 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. - View Dependent Claims (2, 3, 5, 6)
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4. A battery control method for controlling charging/discharging of a battery pack, performed by a battery control apparatus, comprising steps of:
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acquiring a voltage value of each of cells measured by a voltage detection unit; calculating a charging rate of each of the cells based on the measured voltage value; calculating an integrated current value by integrating current values of a battery pack that is configured with a plurality of the cells; calculating a cell capacity value of each of the cells based on the integrated current value, and the charging rate of each of the cells; calculating a dischargeable capacity value of each of the cells from the cell capacity value and charging rate thereof; and controlling charging or discharging of the battery pack based on the dischargeable capacity value of each of the cells.
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Specification