초록 ▼

A technique of operating a lithium-ion (Li-ion) battery is proposed for maximizing battery life. In a first instance, this technique calls for charging the battery at a lower temperature than the temperature at which discharge begins. Preferably, the battery is charged at a temperature T.sub.1 in th

A technique of operating a lithium-ion (Li-ion) battery is proposed for maximizing battery life. In a first instance, this technique calls for charging the battery at a lower temperature than the temperature at which discharge begins. Preferably, the battery is charged at a temperature T.sub.1 in the range between about +5.degree. C. and -20.degree. C.; and discharged at a temperature T.sub.2, in the range of about +5.degree. C. to +30.degree. C., T.sub.2 being higher than T.sub.1. In another instance proposed by the invention, the battery is charged to an elevated state of charge which is above an initial state of charge at a temperature T.sub.1 between about +5.degree. C. and -20.degree. C. which is lower than a temperature T.sub.2, in the range of about +5.degree. C. to +30.degree. C., at which discharge begins. In still another instance proposed by the invention, after the battery has been charged and discharged during the eclipse season, it is then charged to an intermediate charge level between about 40% and about 60% state of charge over a relatively long lapsed duration of time, about one month to about six months, and thereafter, the battery is maintained at this intermediate charge level.

대표청구항 ▼

[ What is claimed is:] [5.] A method of operating a lithium-ion (Li-ion) battery so as to maximize battery life, the battery being less than fully charged, the method comprising the step of:(a) reaching an elevated state of charge above a minimal state of charge at a temperature T.sub.1 between abou

[ What is claimed is:] [5.] A method of operating a lithium-ion (Li-ion) battery so as to maximize battery life, the battery being less than fully charged, the method comprising the step of:(a) reaching an elevated state of charge above a minimal state of charge at a temperature T.sub.1 between about +5.degree. C. and -20.degree. C. which is lower than a temperature T.sub.2, in the range of about +5.degree. C. to +30.degree. C. at which discharge begins.