Power storage device and method of manufacturing power storage device
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United States of America Patent
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Feb 23, 2021
Grant Date -
May 9, 2019
app pub date -
Nov 5, 2018
filing date -
Nov 8, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A power storage device includes an electrode assembly, an accommodation case accommodating the electrode assembly, an external terminal provided on an outer surface of the accommodation case, a collector terminal connecting the electrode assembly and the external terminal, and a welding portion connecting the collector terminal and the external terminal. The external terminal includes an opposed surface opposed to the outer surface and an outer surface located opposite to the opposed surface. The external terminal has an insertion hole extending from the opposed surface toward the outer surface and a step portion located around an opening in the insertion hole located on a side of the outer surface. The collector terminal includes a contact surface in contact with a surface of the step portion. The welding portion is formed to weld the surface of the step portion and the contact surface.
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