NOVELTY - A pure warm water at 45-50 degrees C is added into preparing trough, cobalt chloride (2.5) is added into pure warm water, and stirred, to obtain cobalt chloride solution. The pure warm water at 60-65 degrees C is added into preparing trough, ammonium carbonate is added and stirred, to obtain ammonium carbonate precipitation reagent. The cobalt chloride solution and ammonium carbonate precipitation reagent are reacted, pulpified, filtered, titrated with silver nitrate, parched, smashed and treated in micro-reducible air condition, to obtain cobalt protoxide products.    USE - Manufacture of cobalt protoxide is used as powder material for battery.    ADVANTAGE - The cobalt protoxide of high quality is manufactured efficiently and has high cobalt content. The battery composed of cobalt protoxide powder has high performance characteristics and high output power.    DETAILED DESCRIPTION - A pure warm water (in m3) (2) at 45-50 degrees C is added into preparing trough, cobalt chloride (2.5) is evenly added into pure warm water, and stirred for 20-30 minutes, to obtain cobalt chloride solution. When the concentration of cobalt chloride reaches 70-75 g/L, pH is adjusted to 4.5, and then pumped into cobalt liquid storing cistern. The pure warm water (2) at 60-65 degrees C is added into preparing trough, ammonium carbonate is added slowly and stirred, to obtain ammonium carbonate precipitation reagent. When the concentration of ammonium carbonate reaches 210 g/L, then the ammonium carbonate is pumped into lye storing cistern. The pure cool water is added into mixing trough and reaction trough until the water level is over stirring vane, and then the pure warm water is added into cobalt sinking trough until the water level is over stirring vane. The content in the mixing trough is stirred, and the cobalt liquid pumped from cobalt liquid storing cistern is mixed with lye which is pumped from lye storing cistern and then entered into reaction trough, and pH is adjusted. When the temperature of reaction trough reaches 50-55 degrees C and pH 7.65-7.75, then the cobalt carbonate (CoCO3) is generated. The reaction trough begins to let out solution to sinking cobalt groove, stirred simultaneously, filtered and washed. When the volume of ground paste in sinking cobalt groove reaches 4 m3, the ground paste is filtered in filter press, washed, the filtering plate is loosened to unload filter mass, pure water is added before pulpification begins, stirred slowly while adding filter mass into pulpification groove, and simultaneously pure water is added, and stirred for 30 minutes. Then, the pulpified material is filtered into filter press, washed until white settling, titrated with silver nitrate and then the chloride ion in filtrate is detected to be less than 0.03 g/L. The precipitate washed with wet cobalt carbonate filter mass is passed into hot wind parching house at 100 degrees C or less, parched, material is added into crusher, and smashed, to obtain cobalt carbonate products having granularity of 0.3-0.4 mu m. The calcination is carried out in reducing furnace which is installed with 7 computer temperature controlling areas at controlling temperature in order of 300 degrees C, 400 degrees C, 500 degrees C, 500 degrees C, 450 degrees C, 400 degrees C and 300 degrees C. The protective gas is passed in order to drive air in furnace before feeding 2 hours or more, the material-containing cobalt carbonate is passed through 7 computer temperature controlling areas in furnace at speed of 15 minutes for each time, and treated in micro-reducible air condition, to obtain cobalt protoxide products. The obtained cobalt protoxide is smashed, double packed using aluminum foil bag vacuum package for inner package and composite plastic film for outer package.