The utility model discloses a novel
cylindrical power supply which comprises an aluminum shell, the bottom end of the aluminum shell is provided with an
anode column hole, the lower end and the upper end of the aluminum shell are respectively provided with an
anode busbar and a
cathode busbar, the top end of the aluminum shell is provided with a cover plate, the cover plate is provided with a
cathode column hole, and the
anode column hole is provided with a
cathode column hole. Insulating pads are arranged between the positive
busbar and the bottom of the aluminum shell and between the negative busbar and the cover plate, a roll core is arranged in the aluminum shell, and an insulating film is arranged outside the roll core. Compared with the prior art, the novel
cylindrical power supply has the advantages that the filling space of
electrolyte can be increased, the purpose of prolonging the cycle life of a battery is achieved,
laser welding is adopted for the positive pole and the positive pole hole in the bottom of the aluminum shell,
laser welding is adopted for the negative pole and the negative pole hole in the cover plate,
pier pressing is not needed, and the cost is reduced. And the space
utilization rate is improved.