Patent ID: 7416811

Claim:
A battery, comprising: a first polarity electrode strip that includes a first coating on faces of an elongate first substrate, the first coating including an active material; a second polarity electrode strip configured to serve as a negative electrode, the second polarity electrode strip including a second coating on faces of an elongate second substrate, the second coating including lithium metal; the first polarity electrode strip and the second polarity electrode strip being interleaved with a separator and wound together so as to form a spiral roll configured such that: the first polarity electrode strip has an inner end and an outer end, the second polarity electrode strip has an inner end and an outer end, the second polarity electrode strip is outermost of the first polarity electrode strip and the second polarity electrode strip for one full turn of the spiral roll, the separator is outermost of the separator, the first polarity electrode strip and the second polarity electrode strip, and the second polarity electrode strip includes an exposed region where the faces of the second substrate are devoid of the second coating, the exposed region is located at the outer end of the second polarity electrode strip such that the portion of the second polarity electrode strip that is outermost on the roll includes a first region where a face of the second substrate is the outermost part of the second electrode, and a second region where the second coating is the outermost part of the second electrode.