Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yuichi Maekawa0
Hiroyuki Mizuno0
Kazuyuki Tukawaki0
Kiyohide Takimoto0
Date of Patent
December 19, 2006
0Patent Application Number
104401070
Date Filed
May 19, 2003
0Patent Primary Examiner
Patent abstract
The present invention provides a sealed battery, in which leakage can be detected in reliable manner, a method for manufacturing the sealed battery, and a method for detecting leakage of the sealed battery. The invention provides a sealed battery containing helium, a method for manufacturing the sealed battery, and a method for detecting leakage. From inside a battery case sealed except an electrolyte inlet, the air is withdrawn, and pressure is applied by a gas containing helium under pressure higher than the atmospheric pressure through the electrolyte inlet. The electrolyte is injected, and after the electrolyte and the gas containing helium have been injected, the electrolyte inlet is sealed.
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