Electric storage device, electric storage apparatus, method for producing electric storage device, and method for producing cover plate
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Dec 14, 2016
filing date -
Feb 20, 2013
priority date (Note) -
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Abstract
An electric storage device includes an electrode assembly including a positive electrode plate and a negative electrode plate that are insulated from each other, and a case that houses the electrode assembly. The case includes a case body including an opening, and a cover plate that is placed on an opening edge of the opening of the case body so as to cover the opening. The case body includes a step portion at the opening edge. The cover plate includes a projection that is inserted into the opening of the case body. At least a portion of the projection opposes the step portion within the case body. A seam between the cover plate and the opening edge of the case body is laser welded in at least the step portion.
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