Panasonic Corporation

Kyousuke Miyata

Mikinari Shimada

Hajime Nishino

Tomomichi Ueda

To operate a safety mechanism normally even when an accident happens. For this object, an electrochemical element includes an exhaust valve that operates when an internal pressure in a casingreaches a predetermined pressure to release gas occurring in the casing to the outside, and a perforated platehaving holesand, which is provided between an electrode groupand the exhaust valve. The area of the perforated plateexcluding the holesandis 20% or more and 50% or less of the area of the opening of the casing. The perforated plateis adapted for electrically insulating the electrode groupfrom the sealing member

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Osaka, Japan

Kyousuke Miyata