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United States of America Patent
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Issued Date -
Oct 3, 2024
app pub date -
Mar 28, 2024
filing date -
Mar 31, 2023
priority date (Note) -
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Abstract
An electrode wound body includes positive and negative electrodes, and a separator between the positive electrode and the negative electrode. The positive electrode includes a positive foil extension extending from a positive electrode foil. The negative electrode includes a negative foil extension extending from a negative electrode foil. The positive electrode, the negative electrode, and the separator are wound to define a spiral including a through hole with a central axis extending through the through hole. The positive foil extension and the negative foil extension extend from opposite ends of the electrode wound body. Portions of the positive foil extension include bends that bend towards the central axis so that the portions of the positive foil extension overlap to define a first surface. Portions of the negative foil extension include bends that bend towards the central axis so that the portions of the negative foil extension overlap to define a second surface.
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