Patent ID: 6746494
Filing Date: 2004-06-08
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A battery manufacturing method comprising the steps of:drying a plurality of positive electrode plates and a plurality of negative electrode plates; layering the positive electrode plates and negative electrode plates alternately upon one another with intervening separators therebetween, thereby constituting electrode plate groups; assembling collector plates to the electrode plate groups; transferring the electrode plate groups with the collector plates from one to another of a plurality of vacuum chambers having different vacuum levels; providing said plurality of vacuum chambers each with a gate for receiving or releasing at least one electrode plate group of said electrode plate groups; performing a welding operation using electronic beams in one of the plurality of vacuum chambers in which a vacuum of sufficient level to effect irradiation of electronic beams is created; and said welding operation including welding at least one collector plate of said collector plates to an end face of at least one electrode plate group of said electrode plate groups.