US 12,266,807 B2
Rectangular secondary cell and method for manufacturing same
Yukinobu Miyamura, Hyogo (JP); and Hiroaki Imanishi, Hyogo (JP)
Assigned to PANASONIC HOLDINGS CORPORATION, Osaka (JP)
Appl. No. 17/635,330
Filed by Panasonic Corporation, Osaka (JP)
PCT Filed Jul. 30, 2020, PCT No. PCT/JP2020/029257
§ 371(c)(1), (2) Date Feb. 14, 2022,
PCT Pub. No. WO2021/039267, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-158399 (JP), filed on Aug. 30, 2019.
Prior Publication US 2022/0320648 A1, Oct. 6, 2022
Int. Cl. H01M 50/186 (2021.01); H01M 10/04 (2006.01); H01M 50/528 (2021.01); H01M 50/531 (2021.01); H01M 50/543 (2021.01)
CPC H01M 50/186 (2021.01) [H01M 10/04 (2013.01); H01M 50/528 (2021.01); H01M 50/531 (2021.01); H01M 50/543 (2021.01)] 6 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,
the current collector including a first connector and a second connector integrated into a single member, the first connector being connected to the external terminal, the second connector being connected to the edge of the positive electrode plate or the negative electrode plate,
the first connector penetrating through-holes of the sealing plate and the external terminal from an inside to an outside of the sealing plate, and having a tip crimped so as to be connected to the external terminal and to fix the current collector and the external terminal to the sealing plate,
the first connector being in a shape of a cylinder,
the second connector being in a shape of a plate or a block extending from the sealing plate toward the bottom of the battery case in a direction perpendicular to the sealing plate at the longitudinal end of the sealing plate,
the second connector having an upper surface and a first side surface,
the upper surface being parallel to the sealing plate,
the first side surface being parallel to a longitudinal direction of the sealing plate and extending from the upper surface toward the bottom of the battery case in a direction perpendicular to the sealing plate,
the second connector being connected to the edge of the positive electrode plate or the negative electrode plate on the first side surface, and
an axis of the first connector in the shape of the cylinder and the first side surface of the second connector overlapping each other in the width direction of the sealing plate.