Patent ID: 9692033
Date: 2017-06-27
CPC Classifications: H01M,Y02E,Y02P,Y10T

Claim:
1. A manufacturing method of a sealed battery that includes: a power generating element; a housing member in which the power generating element is housed and that is a tubular shape with a bottom; a lid member that closes off an opening of the housing member, and has a through-hole and a protruding portion that protrudes from an edge of the through-hole on a side facing an inside of the housing member toward the housing member; a collector terminal member including a first end having a cylindrical shape, the first end inserted through the through-hole and extending outside of the lid member, and a second end connected to the power generating element inside of the housing member; and a first insulating member that is elastic, is interposed between the collector terminal member and the lid member to electrically insulate the lid member from the collector terminal member, and is provided on a housing member side of the lid member, the manufacturing method comprising: compressing the first insulating member with the protruding portion of the lid member, measuring a position of the lid member and a compression load applied by the lid member during the compressing, calculating, from the measuring, a slope of a change in the compression load applied by the lid member with respect to the position of the lid member, and after the slope of a change in the compression load with respect to the position of the lid member reaches a local maximum, stopping compressing when a slope of a change in the compression load with respect to the position of the lid member reaches a predetermined value, wherein the predetermined value is greater than a value of the local maximum, and wherein the slope of the change in the compression load with respect to the position of the lid member decreases after the local maximum and then increases after the decrease.