Patent ID: 8591604
Filing Date: 2013-11-26
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A method of making an electrode for a battery, the method comprising (a) coating a slurry including an electrode active material onto a first side and a second side of a current collector using an intermittent coating process to provide a plurality of first patches of the slurry on the first side separated by uncoated spaces and a plurality of second patches of the slurry on the second side separated by uncoated spaces, wherein each of the first patches overlaps lengthwise with one of the second patches, wherein a lengthwise portion on the second side opposite each of the first patches is not coated with slurry, wherein a lengthwise portion on the first side opposite each of the second patches is not coated with slurry; and wherein the uncoated lengthwise portions on the second side are longer than the uncoated lengthwise portions on the first side; (b) cutting the current collector at lengthwise points to provide a plurality of individual electrodes, each individual electrode including one of the first patches, one of the second patches, one of the uncoated lengthwise portions on the first side, and one of the uncoated lengthwise portions on the second side; and (c) winding each of the individual electrodes lengthwise into a spiral configuration having a core spiral having an inner surface including the uncoated lengthwise portion on the first side of the current collector and an outer spiral having an outer surface including the uncoated lengthwise portion on the second side of the current collector.