US 12,341,204 B2
Rectangular secondary battery
Hiroshi Takamatsu, Hyogo (JP); and Hiroaki Imanishi, Hyogo (JP)
Assigned to PANASONIC CORPORATION, Osaka (JP)
Appl. No. 17/625,991
Filed by Panasonic Corporation, Osaka (JP)
PCT Filed Apr. 27, 2020, PCT No. PCT/JP2020/017977
§ 371(c)(1), (2) Date Jan. 10, 2022,
PCT Pub. No. WO2021/014704, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 2019-134853 (JP), filed on Jul. 22, 2019.
Prior Publication US 2022/0278402 A1, Sep. 1, 2022
Int. Cl. H01M 50/188 (2021.01); H01M 4/70 (2006.01); H01M 50/184 (2021.01); H01M 50/191 (2021.01); H01M 50/503 (2021.01)
CPC H01M 50/188 (2021.01) [H01M 4/70 (2013.01); H01M 50/184 (2021.01); H01M 50/191 (2021.01); H01M 50/503 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A rectangular secondary battery comprising:
an electrode body including a positive electrode plate and a negative electrode plate;
a rectangular battery case having an opening and housing the electrode body;
a sealing plate sealing the opening;
a current collector connected to an edge of the positive electrode plate or the negative electrode plate at a longitudinal end of the sealing plate; and
an external terminal located outside the sealing plate and connected to the current collector, wherein:
the current collector extends, at the longitudinal end of the sealing plate, in a direction perpendicular to the sealing plate from the sealing plate toward a bottom of the battery case,
the electrode body and the current collector are wrapped in an insulating holder and housed in the battery case, while being integrally fixed to the sealing plate,
the insulating holder is in a shape of a bag open toward the sealing plate, and
the insulating holder is compressed along a thickness thereof at a portion between the current collector and the bottom of the battery case.