Laminate-type battery and process for its manufacture
First Claim
1. A laminate-type battery, comprising:
- a laminated electrode prepared by laminating a positive plate formed by providing a positive pole active material layer on a surface of a positive pole sheet collector having one edge and another edge, a negative plate formed by providing a negative pole active material layer on a surface of a negative pole sheet collector having one edge and another edge, said one edge of the negative pole sheet collector being located on a side of said one edge of the positive pole sheet collector, and a separator having one edge and another edge and lying between said positive plate and said negative plate, said one edge of the separator being located on said side of said one edge of the positive pole sheet collector, wherein the one edge of the collector of at least one of said positive plate and said negative plate, as a first electrode plate, has a protrusion that protrudes out beyond the one edge of the collector of the other electrode plate, as a second electrode plate, of opposite polarity, and wherein a short-circuit preventing layer for preventing an electrical short-circuit between the first electrode plate and the second electrode plate is provided on or over the protrusion of the first electrode plate.
1 Assignment
0 Petitions
Accused Products
Abstract
There are provided coiled electrode batteries with high yields, while short-circuiting in the batteries is prevented. A coiled electrode battery according to the invention has coiled electrodes consisting of positive and negative poles 21, 22 and two separators 23 lying between them. In the coiled electrodes, insulating layers 216, 226 made of insulating resin are formed on both sides of the proximal sections of the protrusions 213, 223 of the positive and negative poles 21, 22. Thus, even if the non-protruding sections of the positive and negative electrodes 21, 22 become exposed due to winding misalignment of the separators 23 in the lengthwise direction, the presence of the insulating layers 216, 226 prevents short-circuits between the proximal sections of the protrusions 213, 223 of the positive and negative electrodes 21, 22. As a result, yields are increased as short-circuits are avoided inside the battery.
-
Citations
14 Claims
-
1. A laminate-type battery, comprising:
-
a laminated electrode prepared by laminating a positive plate formed by providing a positive pole active material layer on a surface of a positive pole sheet collector having one edge and another edge, a negative plate formed by providing a negative pole active material layer on a surface of a negative pole sheet collector having one edge and another edge, said one edge of the negative pole sheet collector being located on a side of said one edge of the positive pole sheet collector, and a separator having one edge and another edge and lying between said positive plate and said negative plate, said one edge of the separator being located on said side of said one edge of the positive pole sheet collector, wherein the one edge of the collector of at least one of said positive plate and said negative plate, as a first electrode plate, has a protrusion that protrudes out beyond the one edge of the collector of the other electrode plate, as a second electrode plate, of opposite polarity, and wherein a short-circuit preventing layer for preventing an electrical short-circuit between the first electrode plate and the second electrode plate is provided on or over the protrusion of the first electrode plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A laminate-type battery, comprising:
-
a laminated electrode prepared by laminating a positive plate formed by providing a positive pole active material layer on a surface of a disk-shaped positive pole sheet collector, a negative plate formed by providing a negative pole active material layer on a surface of a disk-shaped negative pole sheet collector, and a disk-shaped separator lying between said positive plate and said negative plate, wherein an edge of the collector of at least one of said positive plate and said negative plate, as a first electrode plate, has a protrusion that protrudes out beyond an edge of the collector of the other electrode plate, as a second electrode plate, of opposite polarity, and wherein a short-circuit preventing layer for preventing an electrical short-circuit between the first electrode plate and the second electrode plate is provided on or over the protrusion of the first electrode plate.
-
Specification