Method and device for manufacturing coiled electrode group

An apparatus for manufacturing a spiral electrode group for a battery by winding a belt-shape positive electrode plate (8) and a belt-shape negative electrode plate (4) in a spiral shape while laminating the positive electrode plate (8) and the negative electrode plate (4) with a separator (7) interposed therebetween, said apparatus comprising:

• a negative electrode plate cassette (31) formed by winding a negative electrode plate (4) of said belt-shape electrode plates (8, 4) with a predetermined length by multiple turns on an outer peripheral surface of a drum (44) supported rotatably, and simultaneously by maintaining the electrode plate in a wound state on said drum (44) while the electrode plate is locked by a separable lock member (53) in contact with a wound end of the electrode plate against slack;
• a positive electrode plate cassette (29) for maintaining a positive electrode plate (8) of said belt-shape electrode plates (8, 4) with the predetermined lengths in a pullable manner;
• a separator cassette (27) including a pair of winding shafts (41A, 41B) rotatably supported in parallel with each other, and maintaining the separator (7) while both ends in the lengthwise direction of the separator (7) with a predetermined length are engaged with engagement slits (40) formed along the shaft center of said pair of individual winding shafts (41A, 41B), and simultaneously portions of said separator (7) divided according to the lengths of the positive electrode plate (8) and the negative electrode plate (4) are respectively wound on said pair of winding shafts (41A, 41B);
• and
• a plurality of group winding head units (20) provided for circulating along a circular transportation path, wherein
• a spiral electrode group (103) is formed by sequentially mounting said positive electrode plate cassette (29), said negative electrode plate cassette (31), and said separator cassette (27) on the individual group winding head units (20) at a supply position on said transportation path, supplying said positive electrode plate (8) and negative electrode plate (4) to predetermined positions on both sides of said separator (7) in contact with a winding shaft (22) of said individual group winding head unit (20), positioning the ends of said positive electrode plate (8) and negative electrode plate (4) to predetermined relative positions, and winding said positive electrode plate (8), said negative electrode plate (4), and said separator (7) on said winding shaft (22) rotationally driven while the positive electrode plate (8), the negative electrode plate (4), and the separator (7) are being laminated in a process of circulating said group winding head units (20) on said path.

An apparatus for manufacturing a spiral electrode group for a battery by winding a belt-shape positive electrode plate (5) and a belt-shape negative electrode plate (4) in a spiral shape while laminating the positive electrode plate (5) and the negative electrode plate (4) with a separator (7) interposed therebetween, said apparatus comprising:

• positive and negative electrode plate cassettes (35, 31) formed by respectively winding the electrode plates (5, 4) with predetermined lengths by multiple turns on outer peripheral surfaces of drums (44) supported rotatably, and simultaneously maintaining the electrode plates in a wound state on said drums (44) while the electrode plates are locked by separable lock members (53) in contact with wound ends of the electrode plates against slack;
• a separator cassette (27) including a pair of winding shafts (41A, 41B) rotatably supported in parallel with each other, and maintaining the separator (7) while both ends in the lengthwise direction of the separator (7) with a predetermined length are engaged with engagement slits (40) formed along the shaft center of said pair of individual winding shafts (41A, 41B), and simultaneously portions of said separator (7) divided according to the lengths of the positive electrode plate (5) and the negative electrode plate (4) are respectively wound on said pair of winding shafts (41A, 41B);
• and
• a plurality of group winding head units (20) provided for circulating along a circular transportation path, wherein
• a spiral electrode group (103) is formed by sequentially mounting said positive electrode plate cassette (35), said negative electrode plate cassette (31), and said separator cassette (27) on the individual group winding head units (20) at a supply position on said transportation path, supplying said positive electrode plate (5) and negative electrode plate (4) to predetermined positions on both sides of said separator (7) in contact with a winding shaft (22) of said individual group winding head unit (20), positioning the ends of said positive electrode plate (5) and negative electrode plate (4) to predetermined relative positions, and winding said positive electrode plate (5), said negative electrode plate (4), and said separator (7) on said winding shaft (22) rotationally driven while the positive electrode plate (5), the negative electrode plate (4), and the separator (7) are being laminated in a process of circulating said group winding head units (20) on said path.