US 12,341,222 B2
Secondary battery and method of manufacturing same
Ryoichi Wakimoto, Hyogo (JP); Hiroaki Imanishi, Hyogo (JP); and Yukinobu Miyamura, Hyogo (JP)
Assigned to SANYO ELECTRIC CO., LTD., Osaka (JP); and PANASONIC HOLDINGS CORPORATION, Osaka (JP)
Appl. No. 17/634,089
Filed by SANYO Electric Co., Ltd., Osaka (JP); and Panasonic Corporation, Osaka (JP)
PCT Filed Sep. 11, 2020, PCT No. PCT/JP2020/034405
§ 371(c)(1), (2) Date Feb. 9, 2022,
PCT Pub. No. WO2021/060010, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-174879 (JP), filed on Sep. 26, 2019.
Prior Publication US 2022/0376367 A1, Nov. 24, 2022
Int. Cl. H01M 50/538 (2021.01); H01M 10/04 (2006.01); H01M 50/103 (2021.01); H01M 50/536 (2021.01)
CPC H01M 50/538 (2021.01) [H01M 10/0431 (2013.01); H01M 50/103 (2021.01); H01M 50/536 (2021.01)] 6 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
an electrode assembly including a positive electrode plate and a negative electrode plate;
a rectangular outer body having an opening and containing the electrode assembly;
a sealing plate for sealing the opening; and
a terminal attached to the sealing plate, wherein
the electrode assembly has a positive electrode tab group at one end and a negative electrode tab group at the other end,
the electrode assembly has a first main surface and a second main surface oriented facing each other,
the rectangular outer body has a bottom, a pair of first side walls oriented facing each other, and a pair of second side walls oriented facing each other,
the positive electrode tab group is located adjacent to one of the first side walls,
the negative electrode tab group is located adjacent to the other first side wall,
the positive electrode tab group or the negative electrode tab group, and the terminal are electrically connected to each other through a current collector,
the positive electrode tab group or the negative electrode tab group is connected to the current collector while being bent, and
fixing means are attached across the first main surface, the current collector and the second main surface,
wherein with respect to the width direction of the current collector, a joint between the current collector and the positive electrode tab group or the negative electrode tab group is displaced toward a root of the positive electrode tab group or the negative electrode tab group.