▎ 摘　　要

NOVELTY - Cylindrical silicon cathode lithium manganate battery comprises a separator, an electrolyte, a steel case, and a cap, and further comprises a positive electrode sheet and a cathode sheet, and the cathode sheet includes 93.6-95.5 wt.% silicon carbon, 0.5-1.5 wt.% biomass super carbon black with a resistivity of less than 2ohm m having particle size of 45-55nm, 1-1.5 wt.% highly conductive carbon fiber with conductivity greater than 10S/cm, 1-1.5 wt.% sodium carboxymethyl cellulose, 1-2 wt.% water-based adhesive and 0.8-1.1 wt.% N-methylpyrrolidone. USE - Cylindrical silicon cathode lithium manganate battery. ADVANTAGE - The cylindrical silicon negative electrode lithium manganate battery has good safety performance, high discharge platform, high specific energy, large continuous discharge current, high instantaneous discharge current, and good cycle performance. It has been charged and discharged 600 times, and its capacity retention rate is over 80%. The battery anode material uses silicon carbon material, which can effectively inhibit the expansion and pulverization of the silicon anode material and improve the battery life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing cylindrical silicon cathodemanganese acid lithium ion battery, which involves: (A) preparing the positive plate and the negative plate, and cutting the two into a predetermined size; (B) adding prepared anode sheet, placing cathode sheet are respectively on the full-automatic winding machine; (C) using diaphragm to isolate the anode sheet and the cathode sheet; (D) welding the anode sheet and the anode ear of aluminum belt; (E) welding the cathode sheet and cathode ear of the copper belt; (F) winding the anode sheet and the cathode sheet together to form a winding core; (G) welding rolled core with one end of the negative plate is equipped with a lower gasket; (H) fixing the annular groove of the upper gasket and the positive lug; (I) making the electric core; (J) testing the short circuit condition of the electric core; (K) selecting the electric core with short circuit as the qualified electric core; (L) inserting the qualified electric core into a jig, putting into a vacuum oven; (M) placing the cleaned finished electric core at the temperature of 35 degrees centigrade to -45 degrees centigrade for activating for 24-32 hours; (N) placing the cleaned finished product electric core into the forming cabinet to be formed; (O) aging the cleaned finished product electric core for 72h at the temperature of 25 degrees centigrade to -35 degrees centigrade, then performing voltage internal resistance screening to the electric core; and (P) screening the finished battery core capacity single charging voltage, aging for 168h under the environment of the 3.6V-3.9V temperature environment to prepare finished product cylindrical silicon cathode manganese acid lithium ion battery.