Patent ID: 7867653

Claim:
An alkaline storage battery system comprising: an alkaline storage battery including: an electrode group having a hydrogen storage alloy negative electrode using a hydrogen storage alloy as a negative electrode active material, a nickel positive electrode using nickel hydroxide as a main positive electrode active material, and a separator; an alkaline electrolyte; and an outer can accommodating the electrode group and the alkaline electrolyte; in the nickel positive electrode, zinc (Zn) being added to nickel hydroxide that is the main positive electrode active material with an addition amount of 5% by mass or less with respect to the mass of nickel in the positive electrode active material, the alkaline electrolyte having a concentration of 6.5 mol/L or less, the alkaline electrolyte containing lithium (Li) of 0.3 mol/L or more, the alkaline electrolyte containing sodium hydroxide, potassium hydroxide, and lithium hydroxide, and a charge-discharge control system being arranged to enable partial charge-discharge control of state of charge (SOC) only within the range of 20-80%.