Sealed secondary battery and manufacturing method of sealed secondary battery
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United States of America Patent
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Jan 3, 2017
Grant Date -
Sep 25, 2014
app pub date -
Sep 27, 2013
filing date -
Mar 22, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
According to one embodiment, in a manufacturing method of a sealed secondary battery of the embodiment, a first sealing body, which is configured to seal an opening portion of a lid body to cover the opening portion and is formed into a sheet-like shape by using a metal material, is placed on the lid body, and the first sealing body is welded to the lid body. The sealed secondary battery having the first sealing body welded thereto is charged, and the sealed secondary battery is discharged after the charge. A hole is bored in the first sealing body to form a hole portion after the discharge, a second sealing body is placed to cover the first sealing body, and the second sealing body is welded to the lid body through the first sealing body.
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