To provide a nonaqueous electrolyte solution secondary battery without danger of having electric corrosion generated at a sealing plate constituting a battery can.
The sealing plate 2 of the nonaqueous electrolyte solution secondary battery is structured by adhering together a first metal plate 21 arranged toward an inside of the battery can 1 and a second metal plate 22 arranged toward an outside of the battery can 1. The first metal plate 21 is made of aluminum and the second metal plate is made of iron with its surface nickel-plated. A first gas exhaust hole 25 is opened at the first metal plate 21 and a second gas exhaust hole 26 is opened at the second metal plate at a position opposing the first gas exhaust hole 25. A valve film 24 is fitted at the first metal plate 21 to block the first gas exhaust hole 25, and a nickel-plated coating layer 30 is formed at the first metal plate 21 including the valve film 24 for a whole area of the surface opposing the second metal plate 22.
COPYRIGHT: (C)2004,JPO&NCIPI
Koichi Sato
Naoya Nakanishi
Atsuhiro Funabashi
Toshiyuki Nohma
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