US 12,278,383 B2
Battery
Ryoichi Wakimoto, Hyogo (JP)
Assigned to SANYO ELECTRIC CO., LTD., Osaka (JP)
Appl. No. 17/632,403
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Jun. 23, 2020, PCT No. PCT/JP2020/024537
§ 371(c)(1), (2) Date Feb. 2, 2022,
PCT Pub. No. WO2021/024631, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 2019-145762 (JP), filed on Aug. 7, 2019.
Prior Publication US 2022/0285765 A1, Sep. 8, 2022
Int. Cl. H01M 50/176 (2021.01); H01M 4/02 (2006.01); H01M 4/70 (2006.01); H01M 50/103 (2021.01); H01M 50/184 (2021.01); H01M 50/55 (2021.01); H01M 50/555 (2021.01)
CPC H01M 50/176 (2021.01) [H01M 4/70 (2013.01); H01M 50/103 (2021.01); H01M 50/184 (2021.01); H01M 50/55 (2021.01); H01M 50/555 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A battery comprising:
an electrode body obtained by stacking a positive electrode plate and a negative electrode plate with a separator interposed therebetween;
an exterior body having an opening and housing the electrode body;
a sealing plate sealing the opening;
an external terminal attached to the sealing plate; and
a tab provided at at least one of the positive electrode plate or the negative electrode plate and being electrically connected to the external terminal via a current collector between the electrode body and the sealing plate, wherein:
the current collector includes a first current collector and a second current collector,
the first current collector and the second current collector are welded to each other at a welding point,
the welding point is covered with a covering member,
the covering member is spaced apart from the welding point and the second collector,
the first current collector has a recess,
the first current collector and the second current collector are stacked and welded at the recess,
the covering member covers the recess, and
a part of the covering member enters a dent formed by the recess.