公开(公告)号：EP4250396A1

公开(公告)日：2023-09-27

申请号：EP23163338.9

申请日：2023-03-22

申请人： Dongguan Chao Ba Batteries Co. Ltd.

发明人： YU, Hong Shuai ,  WANG, Mingde ,  ZOU, Jian Ping ,  HU, Xiao Min

IPC分类号： H01M4/24 ,  H01M4/32 ,  H01M4/36 ,  H01M4/52 ,  H01M4/62 ,  H01M10/26 ,  H01M10/34 ,  H01M50/417 ,  H01M50/426

摘要： The invention relates to a Ni-MH battery. The positive electrode active material of the Ni-MH battery is made of spherical nickel hydroxide coated with β-CoOOH; the positive electrode additive used in the positive electrode of the nickel-hydrogen battery comprises tungsten and zinc, and the positive electrode additive further comprises at least one of yttrium and ytterbium. The separator of the battery is made of grafted or fluorinated or sulfonated polypropylene separator. The electrolyte of the Ni-MH battery is an alkaline aqueous solution composed of alkali metal hydroxide, and the concentration of alkali metal hydroxide is 5.5 - 8.0 mol /L. The negative electrode additive used in the negative electrode of the Ni-MH battery comprises yttrium. The Ni-MH battery can effectively reduce the increase in internal resistance of the Ni-MH battery during long-term overcharging in a high-temperature environment, and prolong the service life of the Ni-MH battery.