| abstract |
(57) [Summary] [Purpose] To provide a hydrogen storage alloy battery that facilitates re-absorption of gas generated from the electrode during charge / discharge, controls the pressure rise inside the battery, has excellent load characteristics, and is excellent in safety. To do. In a hydrogen storage alloy battery having a negative electrode in which a hydrogen storage alloy powder is integrated with a metal porous body, a positive electrode, a separator, and an electrolytic solution, the packing density of the hydrogen storage alloy in the negative electrode is 5.2 to 5 0.7 g / cm 3 . |