Abstract: A flat-shaped nonaqueous electrolyte battery including a sealing plate, a metal container, a gasket interposed between the sealing plate and the metal container, and a negative electrode, a positive electrode and a nonaqueous electrolyte that are sealed by pressing inward an edge portion of an opening of the metal container, the sealing plate also serves as a positive electrode terminal, the metal container also serves as a negative electrode terminal, and a peripheral portion of the negative electrode is arranged between an inner bottom surface of the metal container and the gasket is disclosed. It is preferable that a lithium alloy or an oxide of an element that can be alloyed with lithium is used for the negative electrode, and it is preferable that a ratio of a capacity of the negative electrode with respect to that of the positive electrode is at least 1.2.

Abstract: In one embodiment, a flat-shaped nonaqueous electrolyte battery including a sealing plate, a metal container, a gasket interposed between the sealing plate and the metal container, and a negative electrode, a positive electrode and a nonaqueous electrolyte that are sealed by pressing inward an edge portion of an opening of the metal container, the sealing plate also serves as a positive electrode terminal, the metal container also serves as a negative electrode terminal, and a peripheral portion of the negative electrode is arranged between an inner bottom surface of the metal container and the gasket is disclosed. This structure makes it possible to provide a flat-shaped nonaqueous electrolyte battery that achieves large capacity, excellent cycle characteristics and leakproof characteristics as well as high reliability.