NOVELTY - A high-capacity lithium iron phosphate battery manufacturing method involves uniformly coating prepared slurry on a copper foil to obtain a negative pole plate. A battery cell is prepared by drying, rolling, slitting and die cutting on the negative pole plate, and the pole plate is superposed with a positive pole plate. The dried battery cell is packed into a plastic shell, and the leakage is detected. Vacuumizing liquid injection is carried out on a packaged dried battery. Pre-charging and high temperature aging are performed on the battery to obtain a finished product battery.    USE - Method for manufacturing a high-capacity lithium iron phosphate battery for an automobile.    ADVANTAGE - The method enables manufacturing a lithium ion battery in a simple and economical manner with uniform temperature distribution, low internal resistance, better rate discharge characteristics and safety and wide range of application, and without stress inside the battery.    DETAILED DESCRIPTION - A high-capacity lithium iron phosphate battery manufacturing method involves adding 86-94% of carbon powder, 0.5-2% of conductive agent, 2-4% of adhesive and remainder of solvent into a stirrer and fully vacuum stirring to obtain slurry. The slurry is uniformly coated on a copper foil to obtain a negative pole plate for a lithium battery. A battery cell is prepared by drying, rolling, slitting and die cutting on the negative pole plate, and the negative pole plate is superposed with a positive pole plate. The dried battery cell is packed into a plastic shell, and the leakage is detected, where top end of the plastic shell is formed with a liquid injection hole that is provided with a safety valve. A vacuumizing liquid injection is carried out on a packaged dried battery. A pre-charging and high temperature aging are performed on the battery to obtain a finished product battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a high-capacity lithium iron phosphate battery.