Method of manufacturing secondary battery
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United States of America Patent
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Mar 2, 2021
Grant Date -
Apr 18, 2019
app pub date -
Oct 9, 2018
filing date -
Oct 17, 2017
priority date (Note) -
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Abstract
A method of manufacturing a secondary battery including an electrode body including a positive electrode plate and a negative electrode plate, an outer package including an opening and housing the electrode body, a sealing plate sealing the opening, a negative electrode terminal attached to the sealing plate, a negative electrode tab portion provided in the negative electrode plate, and a negative electrode collector electrically connecting the negative electrode tab portion and the negative electrode terminal to each other, the method including welding a flange portion of the negative electrode terminal and the negative electrode collector together by projecting an energy ray, the negative electrode collector includes, before the welding, a rough surface portion, and in the welding, the flange portion of the negative electrode terminal and the negative electrode collector are connected by welding by projecting an energy ray onto the rough surface portion.
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