Non-aqueous electrolytic secondary cell

• US 6,797,429 B1
• Filed: 01/25/2001
• Issued: 09/28/2004
• Est. Priority Date: 11/06/1998
• Status: Expired due to Fees

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Original Assignee: Japan Storage Battery Company Limited (GS Yuasa Corporation)
• Inventors: Komatsu, Shigeo
• Primary Examiner(s): Kalafut, Stephen
• Assistant Examiner(s): Martin, Angela J
• Application Number:
  US09/582,868
• Time in Patent Office: 1,342 Days
• Field of Search: 429/163, 429/164, 429/166, 429/167, 429/176, 429/177, 429/180, 429/181
• US Class Current: 429/163
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 50/105 Pouches or flexible bags
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: H01M 50/126 comprising three or more layers
• CPC Class Codes: H01M 50/178 for pouch or flexible bag cells
• CPC Class Codes: H01M 50/55 on the same side of the cell
• CPC Class Codes: H01M 50/557 Plate-shaped terminals
• CPC Class Codes: H01M 50/562 characterised by the material
• CPC Class Codes: H01M 50/566 by welding, soldering or brazing
• CPC Class Codes: H01M 6/10 with wound or folded electrodes
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A nonaqueous secondary electrolytic battery comprising an electricity-generating element formed by spirally winding a laminate of a positive electrode plate, a separating material and a negative electrode plate, and an electrolytic solution with which the separating material, if it is a separator, is impregnated. The electricity-generating element is sealed in a battery case formed by a resin-laminated sheet comprising a metal layer as a barrier layer. Only a pair of lead terminals are drawn to the exterior of the battery case. The resin sheet comprises an oriented resin layer laminated in both surfaces of the metal layer. The inner heat-fused layers are opposed and heat-fused to each other. A molten and solidified resin mass is formed protruding from the inner end of the welded portion toward the inner space of the battery by 0.1 mm or more. Alternatively, the welded portion is formed thinner at the outer end thereof than at the inner end thereof.

Claims

1. A nonaqueous secondary electrolytic battery comprising:

an electricity-generating element having a positive electrode plate and a negative electrode plate opposed to each other with a separating material interposed therebetween, and lead terminals electrically connected to said electrode plates, respectively; and

a battery case, which is made of a resin sheet, accommodating said electricity-generating element therein, and having a sealed region in which overlapped portions of the resin sheet are sealed together, such that said lead terminals extend through said sealed region;

wherein said resin sheet includes an oriented resin layer provided on both surfaces of a metal layer.