Patent ID: 6537704
Filing Date: 2003-03-25
Classification: H01M,Y02E,Y02P

Abstract:
A solid electrolyte battery comprising:a wound electrode comprising a positive electrode comprising an elongated positive-electrode collector having two sides on which positive-electrode active material layers are formed, a negative electrode comprising an elongated negative-electrode collector having two sides on which negative-electrode active material layers are formed, and a solid electrolyte layer comprising a gel electrolyte comprising a copolymer of polyvinylidene fluoride and hexafluoropolypropylene, wherein said hexafluoropolypropylene is copolymerized at a ratio lower than 8 wt % of said polyvinylidene fluoride and wherein said solid electrolyte layer is formed between said positive electrode and said negative electrode such that said positive electrode and said negative electrode are laminated and wound; and wherein when the total thickness of a pair of said positive-electrode active material layers formed on the two sides of said collector for said positive electrode is total film thickness A and the total thickness of a pair of said negative-electrode active material layers formed on the two sides of said collector for said negative electrode is total thickness B, the total film thickness A of said positive-electrode active material layers satisfies a range from 60 &mgr;m to 150 &mgr;m, and ratio A/B of the total film thickness A of said positive-electrode active material layers with respect to the total thickness B of said negative-electrode active material layers satisfies a range from 0.5 to 1.2.