Patent ID: 7432019

Claim:
A gel electrolyte battery comprising: a positive electrode; a negative electrode disposed opposite to said positive electrode; a separator disposed between said positive electrode and said negative electrode; and gel electrolytes each of which is disposed between said positive electrode and said separator and between said separator and said negative electrode; wherein said separator comprises a mixture of polyethylene and polypropylene, said separator has a thickness satisfying a range not less than 5 μm nor greater than 15 μm, the shutdown temperature of said separator is substantially the same as the shutdown temperature of a separator constituted by polyethylene and the meltdown temperature of said separator is greater than the meltdown temperature of a separator constituted by polyethylene by a range satisfying a range not less than 10° C. nor greater than 30° C. wherein the thickness of the gel electrolytes are not less than 5 μm nor greater than 19 μm.