Charge/discharge control method and charge/discharge control apparatus for lithium ion battery

[0024](Configuration of Charge / Discharge Control Device)

[0025]FIG. 1 is a block diagram illustrating a configuration of a charge / discharge control device 100 according to an embodiment of the present invention. The charge / discharge control device 100 illustrated in FIG. 1 is a device to control charge / discharge of a lithium ion battery 10 (hereinafter, simply referred to as the battery 10) to be a secondary battery and functionally has a battery information acquisition unit 12, a degradation state determination unit 13, a voltage range change unit 14, and a control signal transmission unit 15. The charge / discharge control device 100 is connected to the battery 10 and a controller 11.

[0026]The battery information acquisition unit 12 acquires information, such as an inter-terminal voltage (closed circuit voltage) of the battery 10 during the charge / discharge, a current flowing to the battery 10, and a charge / discharge time of the battery 10, as battery information regarding