Patent ID: 6991873

Claim:
A non-aqueous electrolyte cell comprising: a cell device including a strip-shaped cathode material and a strip-shaped anode material, which are layered with a separator therebetween and coiled only around itself a plural number of times; a non-aqueous electrolyte solution; and a cylindrically-shaped cell can for accommodating the cell device and the non-aqueous electrolyte solution, wherein, said cathode material employs a cathode active material containing a compound of an olivinic structure represented by a general formula Li x Fe 1-y M y PO 4 , where M is at least one selected from a group consisting of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B and Nb, with 0.05≦x≦1.2 and 0.1≦y≦0.8, which compound is used either singly or in combination with other materials; and said non-aqueous electrolyte cell device is a coiled tubular structure with an unrestrained inner diameter d and an outer diameter D subject to the following relationship: 0.05<d/D<0.5.