COVER PLATE MANUFACTURING METHOD AND BATTERY TOP COVER

A cover plate manufacturing method and a battery top cover are provided. The cover plate manufacturing method includes following steps: providing a metal sheet, and punching the metal sheet to form punched holes; flanging a portion of the metal sheet on a periphery of each of the punched holes to form a sidewall extending upward; shaping and flattening each sidewall to enable each sidewall to reach a predetermined state; and splitting a material of each sidewall to form a horizontal bottom wall and form cover plates with terminal holes.