| 摘要 |
Deterioration of discharge capacity of a battery is suppressed. This secondary battery system is provided with a charge/discharge control unit, which controls charging and discharging of a secondary battery, and a battery state detecting unit, which measures a battery temperature of the secondary battery. The charge/discharge control unit calculates a state of charge (SOC1) of the secondary battery, and when the state of charge (SOC1) is equal to or less than an SOC first threshold value (SOCm), a battery temperature (T1) of the secondary battery is measured by means of the battery state detecting unit. When the battery temperature (T1) is equal to or below a battery temperature first threshold value (Tm), the charge/discharge control unit charges the secondary battery at a charging current first threshold value (Im) or less, and when the battery temperature (T1) is higher than the value (Tm) but equal to or below a battery temperature second threshold value (Tn), the charge/discharge control unit charges the secondary battery at a charging current second threshold value (In) or less, and when the battery temperature (T1) is higher than the value (Tm) and also higher than the value (Tn), the charge/discharge control unit stops the charging of the secondary battery. |
