US 12,444,795 B2
Power storage device
Masahiro Yamada, Kariya (JP); Hiromi Ueda, Kariya (JP); Satoshi Morioka, Okazaki (JP); Motoyoshi Okumura, Nagoya (JP); and Takuro Kikuchi, Tokyo (JP)
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Appl. No. 17/415,299
Filed by KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
PCT Filed Dec. 20, 2019, PCT No. PCT/JP2019/050214
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/137923, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-241143 (JP), filed on Dec. 25, 2018.
Prior Publication US 2022/0069395 A1, Mar. 3, 2022
Int. Cl. H01M 50/184 (2021.01); H01G 11/12 (2013.01); H01G 11/80 (2013.01); H01M 50/176 (2021.01); H01M 50/186 (2021.01); H01M 50/209 (2021.01); H01M 50/227 (2021.01); H01M 50/50 (2021.01)
CPC H01M 50/184 (2021.01) [H01G 11/12 (2013.01); H01G 11/80 (2013.01); H01M 50/176 (2021.01); H01M 50/186 (2021.01); H01M 50/209 (2021.01); H01M 50/227 (2021.01); H01M 50/50 (2021.01)] 7 Claims
OG exemplary drawing
 
1. A power storage device comprising:
a plurality of power storage modules laminated in a first direction via a conductive plate, so that the conductive plate and the plurality of power storage modules overlap each other as viewed from the first direction, and wherein the conductive plate includes a through hole formed in a second direction intersecting the first direction, and the through hole is a cooling flow path through which cooling fluid passes,
wherein each of the plurality of power storage modules includes
a laminate including a plurality of bipolar electrodes laminated in the first direction, and a first terminal electrode and a second terminal electrode that are located at opposing ends of the laminate in the first direction,
each of the bipolar electrodes includes:
an electrode plate, a positive electrode provided on a first surface of the electrode plate, and a negative electrode provided on a second surface, opposite from the first surface, of the electrode plate,
wherein the first terminal electrode includes a first surface that faces the bipolar electrodes and a second surface that faces and connects to the conductive plate; and
a sealed body provided on a side surface of the laminate extending in the first direction,
the laminate has an electrode exposure portion exposed from the sealed body, wherein the electrode exposure portion is formed on the second surface of the first terminal electrode,
in a state of the plurality of power storage modules being laminated by disposing the conductive plate on the electrode exposure portion:
the laminate and the conductive plate are restrained in the first direction by a restraining member, and the conductive plate is smaller than the laminate as viewed from the first direction so that the conductive plate does not protrude from an outer periphery of the laminate as viewed from the first direction,
the conductive plate and the electrode exposure portion are located inside the sealed body as viewed from the first direction, and
the conductive plate, the positive electrode, and the negative electrode overlap each other as viewed from the first direction,
the sealed body includes
a main body portion covering the side surface of the laminate;
protruding portions protruding in a width direction intersecting the first direction with end portions of the main body portion in the first direction as base ends and covering peripheral edges of an upper surface and a bottom surface of the laminate; and
a plurality of deformation suppressing portions protruding from the protruding portions in the first direction, wherein the plurality of deformation suppressing portions are disposed apart from each other.