ALUMINUM-CASED CYLINDRICAL BATTERY STRUCTURE WITH ELECTROLYTE INJECTED AT POLE TERMINAL

The present application relates to the technical field of cylindrical battery, and in particular, to an aluminum-cased cylindrical battery structure with electrolyte injected at the pole terminal. The cylindrical battery structure includes a casing equipped with a wound core therein, with the top of the wound core serving as a negative terminal and the bottom of the wound core serving as a positive terminal, the positive terminal includes a cover, the edge of the cover is laser-welded to the bottom of the casing, the bottom of the cover is laser-welded to a positive tab of the wound core, and an explosion-proof valve is disposed at the middle portion of the cover; and an electrolyte injection hole is disposed in the middle of the negative current collector plate and the stud for electrolyte injection.