US 12,230,814 B2
Rectangular secondary battery and assembled battery including the same
Ryoichi Wakimoto, Hyogo (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 16/496,558
Filed by SANYO Electric Co., Ltd., Daito (JP)
PCT Filed Mar. 20, 2018, PCT No. PCT/JP2018/010953
§ 371(c)(1), (2) Date Sep. 23, 2019,
PCT Pub. No. WO2018/180749, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. 2017-060406 (JP), filed on Mar. 27, 2017.
Prior Publication US 2021/0104796 A1, Apr. 8, 2021
Int. Cl. H01M 50/184 (2021.01); H01M 50/147 (2021.01); H01M 50/15 (2021.01); H01M 50/176 (2021.01); H01M 50/188 (2021.01); H01M 50/209 (2021.01)
CPC H01M 50/184 (2021.01) [H01M 50/15 (2021.01); H01M 50/176 (2021.01); H01M 50/188 (2021.01); H01M 50/209 (2021.01); H01M 50/147 (2021.01)] 11 Claims
OG exemplary drawing
 
1. A rectangular secondary battery comprising: an electrode body that includes a positive electrode plate and a negative electrode plate; a rectangular casing that has an opening and contains the electrode body; a sealing plate that has a first terminal attachment hole and a second terminal attachment hole, and seals the opening; a first terminal that is electrically connected to one of the positive electrode plate and the negative electrode plate and inserted into the first terminal attachment hole; a second terminal that is electrically connected to the other of the positive electrode plate and the negative electrode plate and inserted into the second terminal attachment hole; an outer conductor that is connected to a corresponding one of the first terminal and the second terminal, wherein the outer conductor is disposed on an outer side of the sealing plate opposite an inner side thereof facing the electrode body in a thickness direction of the sealing plate; and an outer insulator that is disposed between the outer conductor and the outer side of the sealing plate, wherein the sealing plate has a first fitting recess and a second fitting recess each formed in the outer side of the sealing plate, wherein in the thickness direction of the sealing plate, each of the first fitting recess and the second fitting recess includes a bottom portion sealing an end portion in each of the first fitting recess and the second fitting recess, wherein a center of the sealing plate is located between the first terminal and the second terminal in a longitudinal direction of the sealing plate, wherein the sealing plate has a first end portion and a second end portion on opposite ends in the longitudinal direction of the sealing plate, and has a third end portion and a fourth end portion on opposite ends in a short direction perpendicular to the longitudinal direction, the first end portion closer to the first terminal attachment hole than to the second terminal attachment hole, and the second end portion closer to the second terminal attachment hole than to the first terminal attachment hole, wherein, in the longitudinal direction of the sealing plate, the first fitting recess is disposed nearer than the first terminal attachment hole to the center of the sealing plate, and the second fitting recess is disposed nearer than the first terminal attachment hole to the first end portion of the sealing plate, wherein in the longitudinal direction of the sealing plate, the first fitting recess is disposed between the center of the sealing plate and the first terminal, wherein, in the short direction of the sealing plate, the first fitting recess has an offset from the center of the sealing plate to the third end portion, and the second fitting recess has an offset from the center of the sealing plate to the fourth end portion, wherein the outer insulator has a first fitting protrusion and a second fitting protrusion, the first fitting protrusion is disposed in the first fitting recess, and the second fitting protrusion is disposed in the second fitting recess, wherein a length of the first fitting recess in the longitudinal direction of the sealing plate is larger than a length of the first fitting recess in the short direction of the sealing plate, and wherein a shape of the second fitting recess in plan view is a circular shape.