Patent ID: 8098050

Claim:
A charge/discharge control device for a secondary battery, comprising: a temperature detecting unit detecting a battery temperature of said secondary battery; a state-of-charge detecting unit detecting a state of charge of said secondary battery to output a state value indicating said state of charge; and a setting unit, in a case where said state value falls below a first value corresponding to a threshold value for determining whether charging or discharging of said secondary battery is prioritized, setting a charge power of said secondary battery such that said charge power increases as said state value decreases and a value of said charge power attains a first limit value when said state value reaches a second value, and, in a case where said state value exceeds said first value, setting a discharge power of said secondary battery such that said discharge power increases as said state value increases and a value of said discharge power attains a second limit value when said state value reaches a third value, said setting unit selecting, based on a distribution of said state value, at least one of said first value, said second value and said third value as an object to be varied which varies in accordance with said battery temperature detected by said temperature detecting unit, and increasing a value of said object to be varied as said battery temperature rises.