FLAT-SHAPED NONAQUEOUS ELECTROLYTE BATTERY

PROBLEM TO BE SOLVED: To provide a flat-shaped nonaqueous electrolyte battery for preventing the corrosion of a positive electrode case during a long-term storage. SOLUTION: This flat-shaped nonaqueous electrolyte battery has a structure in which a positive electrode case 1 which functions as a positive electrode terminal and is made of anticorrosive metal and a negative electrode case 7 are sealed by sealing material, a nanaqueous electrolyte containing as electrolyte a positive electrode 2, a negative electrode 5, and lithium fluoride compound is contained in these cases. For surface roughness on the inner surface of the positive electrode case abutting to the positive electrode 2, average roughness (Ra) on the central line in a tracer method measurement is 0.01 μm