Patent ID: 6503657
Filing Date: 2003-01-07
Classification: H01M,Y02E,Y02P

Abstract:
A nonaqueous electrolyte secondary battery, comprising:an electrode group including a positive electrode, a negative electrode containing a material for absorbing-desorbing lithium ions, and a separator arranged between the positive electrode and the negative electrode; a nonaqueous electrolyte impregnated in said electrode group and including a nonaqueous solvent and a lithium salt dissolved in said nonaqueous solvent; and a jacket for housing said electrode group, said jacket being made of a sheet having a thickness of 0.5 mm or less including a resin layer, wherein said nonaqueous solvent contains 40 to 95% by volume of an entire amount of said nonaqueous solvent of &ggr;-butyrolactone, 5 to 40% by volume of an entire amount of said nonaqueous solvent of ethylene carbonate, and 0.05 to 10% by volume of an entire amount of said nonaqueous solvent of viaylene carbonate.