Patent ID: 9293760
Filing Date: 2016-03-22
CPC Classification: H01M,Y02E,Y02P,Y10T

Claim Text:
1. A battery comprising: a positive plate and a negative plate each having a collector and an electrode layer disposed on at least one surface of the collector, the electrode layer containing an active material; and an insulative separator disposed between the positive plate and the negative plate, wherein at least one of the positive plate and the negative plate has a plurality of cracks generated by drying in a whole area of the electrode layer thereof; the plurality of cracks are disposed such that a maximum mutual distance between adjacent cracks is 2 to 10 times an average particle diameter of the active material; the plurality of cracks are disposed such that a total length of the plurality of cracks per unit area is 0.1 to 1.0 cm/cm all of the plurality of cracks do not extend to the collector.