RECTANGULAR ELECTRICITY STORAGE DEVICE AND METHOD FOR PRODUCING RECTANGULAR ELECTRICITY STORAGE DEVICE
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United States of America Patent
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Issued Date -
Feb 16, 2017
app pub date -
Apr 28, 2015
filing date -
May 2, 2014
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Abstract
A rectangular electricity storage device includes a prism-shaped electrode group with an upper surface, a lower surface, and four lateral surfaces, the electrode group including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; an electrolyte; a case with an opening portion, the ease housing the electrode group and the electrolyte; a cover plate covering the opening portion of the case; and an insulation sheet interposed between the electrode group and the case, and insulating the electrode group and the case from each other, wherein the insulation sheet is folded so as to surround the lower surface and the four lateral surfaces of the electrode group.
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