ELECTROCHEMICAL DEVICE
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United States of America Patent
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Issued Date -
Aug 8, 2013
app pub date -
Jun 24, 2011
filing date -
Jul 22, 2010
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Abandoned
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Abstract
An electrochemical device which is free from deterioration of properties due to a process of joining a rigid case and a conductive lid is provided. A welded part PP of a conductive lid 12 and a welded frame member 11d are joined each other by laser welding. A weld bead for joining the welded part PP and the welded frame member 11d is not exposed to an internal space of a rigid package 10; therefore, fused material, the coagulum thereof, or the like created during laser welding are prevented from entering into the internal space of the rigid package 10.
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