US 12,463,298 B2
Electrical storage device
Kenji Oohara, Nagano (JP); Yuta Ishihara, Nagano (JP); Takashi Nozawa, Nagano (JP); Hibiki Oguchi, Nagano (JP); Ko Nakagawa, Nagano (JP); and Akihiko Komatsu, Nagano (JP)
Assigned to RUBYCON CORPORATION, Nagano (JP)
Appl. No. 17/996,531
Filed by RUBYCON CORPORATION, Nagano (JP)
PCT Filed Apr. 13, 2021, PCT No. PCT/JP2021/015323
§ 371(c)(1), (2) Date Oct. 19, 2022,
PCT Pub. No. WO2021/215304, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 2020-074722 (JP), filed on Apr. 20, 2020; and application No. 2020-166146 (JP), filed on Sep. 30, 2020.
Prior Publication US 2023/0207978 A1, Jun. 29, 2023
Int. Cl. H01M 50/533 (2021.01); H01G 9/048 (2006.01); H01G 9/15 (2006.01); H01G 11/26 (2013.01); H01M 50/474 (2021.01); H01M 50/538 (2021.01)
CPC H01M 50/533 (2021.01) [H01G 9/048 (2013.01); H01G 9/151 (2013.01); H01G 11/26 (2013.01); H01M 50/474 (2021.01); H01M 50/538 (2021.01)] 20 Claims
OG exemplary drawing
 
1. An electrical storage device comprising:
a winding structure, and
a first external terminal and a second external terminal connected to the winding structure, wherein
the winding structure includes:
a band-shaped intermediate electrode body which has a first extending portion and a second extending portion extending from an intermediate portion in an extending direction to both sides of the intermediate portion and being wound around the intermediate portion in the same direction,
a first electrode body which is conductively connected to the first external terminal, and which is disposed between the first extending portion positioned at an inner circumferential side and the second extending portion positioned at an outer circumferential side, and which extends s from the vicinity of intermediate portion toward the outer circumferential side,
a second electrode body which is conductively connected to the second external terminal and which disposed between the second extending portion positioned at an inner circumferential side and the first extending portion positioned at an outer circumferential side, and which extends from the vicinity of the intermediate portion toward the outer circumferential side,
a first separator disposed between the intermediate electrode body and the first electrode body, and
a second separator disposed between the intermediate electrode body and the second electrode body, wherein
an outer edge portion of the intermediate electrode body protrudes further outward than the first electrode body and the second electrode body in the winding structure in an axial direction of the winding structure, and
the outer edge portion of the intermediate electrode body is disposed further outward than the first electrode and second electrode body in the winding structure in a radial direction of the winding structure.