| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a nickel hydrogen storage battery which can achieve both of the reduction in short circuit failure occurrence rate of batteries and a longer battery life.SOLUTION: A nickel hydrogen storage battery 2 comprises: an exterior can 10; an alkaline electrolyte; and an electrode group 22 arranged by winding a positive electrode 24 and a negative electrode 26 with a separator 28 interposed therebetween together and sealed in the exterior can 10 together with the alkaline electrolyte. The negative electrode 26 has: a metal sheet 40 having a first surface 42 located on the outer side of the electrode group 22 in a radial direction thereof, and a second surface 44 located on the inner side of the electrode group 22 in the radial direction; a first negative electrode mixture layer 54 formed on the first surface 42 of the metal sheet 40; and a second negative electrode mixture layer 56 formed on the second surface 44 of the metal sheet 40. The first negative electrode mixture layer 54 includes hydrogen-absorbable alloy particles 50, and the second negative electrode mixture layer 56 includes hydrogen-absorbable alloy particles 52. The hydrogen-absorbable alloy particles 50 are smaller than the hydrogen-absorbable alloy particles 52 in average particle diameter.</p> |
