Patent ID: 6051333
Filing Date: 2000-04-18
Classification: H01M,Y02E,Y02P

Abstract:
An alkaline secondary cell having a ratio of an electric capacity of a negative electrode to that of a positive electrode of at least 1, comprising an electrode body having a positive electrode and a pair of negative electrodes, which positive and negative electrodes are spirally wound with an interposing of separators therebetween and a cell case in which the electrode body is inserted, wherein each of the pair of negative electrodes comprise a metal substrate in the form of a metal plate having a thickness of between 10 and 50 .mu.m, and face a respective surface of the positive electrode through one of said separators, and wherein the metal substrates of each of the pair of the negative electrodes are in contact with each other substantially in the second and subsequent turns, except the outermost turn.