Shell and cylindrical battery comprising same

The utility model relates to the technical field of batteries, in particular to a shell, which comprises a first shell and a second shell, the first shell comprises a first sealing part and a first connecting part connected with the first sealing part, and the second shell comprises a second sealing part and a second connecting part connected with the second sealing part; nanoscale holes are formed in the surfaces, used for sealing connection, of the first sealing part and the second sealing part, and the first sealing part is in sealing connection with the second sealing part through an injection molding process; and the first connecting part and the second connecting part are both used for being electrically connected with electrodes of the battery cell units. According to the utility model, the technical problem of degumming caused by sealing with insulating glue in the prior art is solved; besides, the first connecting part and the second connecting part are used for replacing a pole of a traditional cyli