Patent ID: 6936080

Claim:
A method for manufacturing a spiral electrode group for a battery by winding a belt-shape positive electrode plate and a belt-shape negative electrode plate in a spiral shape while laminating the positive electrode plate and the negative electrode plate with a separator interposed therebetween, said method comprising: forming a first plurality of cassettes with a first jig, each cassette containing a length of said positive electrode plate to form a single spiral electrode group; forming a second plurality of cassettes with a second jig, each cassette containing a length of said negative electrode plate to form a single spiral electrode group; forming a third plurality of cassettes with a third jig, each cassette containing a length of said separator to form a single spiral electrode group; each of said first, second and third cassettes being formed mutually independently; sequentially supplying a plurality of group winding head units circulating along a predetermined transportation path with the positive electrode plate cassette, the negative electrode plate cassette, and the separator cassettes respectively, thereby mounting these cassettes on the head units; positioning individual ends of the positive electrode plate and the negative electrode plate to predetermined relative positions in the process for circularly transporting said group winding head units, the positive electrode plate and the negative electrode plate respectively supplied from said positive electrode plate cassette and said negative electrode plate cassette to predetermined positions in the lengthwise direction on the both sides of the separator supplied from said separator cassette; and winding the positive electrode plate, the negative electrode plate, and the separator around a rotationally-driven winding shaft of said group winding head unit while the positive electrode plate, the negative electrode plate, and the separator are being laminated.