NOVELTY - An alkaline storage battery system comprises an alkaline storage battery (10) including an electrode group, an alkaline electrolyte, and an outer can (17) accommodating the electrode group and electrolyte. The electrode group has a hydrogen storage alloy negative electrode (12) using a hydrogen storage alloy as active material, a nickel positive electrode (11) using nickel hydroxide as a main active material, and a separator (13). In the nickel positive electrode, zinc is added to nickel hydroxide.    USE - Alkaline storage battery system, such as nickel-hydrogen storage battery system, is used for hybrid electric vehicles and pure electric vehicles. Can also be used for cell phones, personal computers, and power tools.    ADVANTAGE - The alkaline storage battery system synergistically exhibits an effect of reducing the addition amount of zinc to positive electrode mixture, an effect of reducing the concentration of an alkaline electrolyte, and an effect of increasing the content of lithium in the alkaline electrolyte. Partial charging-discharging is enabled.    DETAILED DESCRIPTION - An alkaline storage battery system comprises an alkaline storage battery including an electrode group, an alkaline electrolyte, and an outer can accommodating the electrode group and electrolyte. The electrode group has a hydrogen storage alloy negative electrode using a hydrogen storage alloy as active material, a nickel positive electrode using nickel hydroxide as a main active material, and a separator. In the nickel positive electrode, zinc is added to nickel hydroxide which is the main active material in an amount of 5 mass% or less with respect to the mass of nickel in the active material. The alkaline electrolyte has a concentration of 6.5 mol/L or less, and contains lithium of 0.3 mol/L or more. The alkaline storage battery system is arranged to enable partial charge-discharge control. The alkaline electrolyte contains sodium hydroxide, potassium hydroxide, and lithium hydroxide.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a nickel-hydrogen storage battery.    Alkaline storage battery (10)    Nickel positive electrode (11)    Hydrogen storage alloy negative electrode (12)    Separator (13)    Outer can (17)