| abstract |
(57) [Problem] To provide a nickel hydrogen storage battery having excellent high-temperature storage characteristics and excellent low-temperature, high-rate discharge characteristics. SOLUTION: In a nickel hydrogen storage battery having a positive electrode using nickel hydroxide as an active material, a negative electrode made of a hydrogen storage alloy, an electrolytic solution made of an alkaline aqueous solution, and a separator, The negative electrode contains at least two types of hydrogen storage alloys a and b having different hydrogen equilibrium dissociation pressures when the hydrogen storage amount is 0.5% by weight at 45 ° C., and the hydrogen equilibrium dissociation pressure of the hydrogen storage alloy b is hydrogen. The hydrogen equilibrium dissociation pressure of the storage alloy a is 0.8 or less, and the addition amount of the hydrogen storage alloy b in the negative electrode is 1 to the electric quantity of the discharge reserve formed in the negative electrode in terms of the hydrogen storage amount. A nickel hydrogen storage battery having an amount corresponding to up to three times. |