US 12,126,053 B2
Battery
Satomi Yamamoto, Miyoshi (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Sep. 15, 2021, as Appl. No. 17/475,556.
Claims priority of application No. 2020-166063 (JP), filed on Sep. 30, 2020.
Prior Publication US 2022/0102819 A1, Mar. 31, 2022
Int. Cl. H01M 50/553 (2021.01); H01M 10/0585 (2010.01); H01M 50/531 (2021.01); H01M 50/54 (2021.01); H01M 10/0525 (2010.01)
CPC H01M 50/553 (2021.01) [H01M 10/0585 (2013.01); H01M 50/531 (2021.01); H01M 50/54 (2021.01); H01M 10/0525 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A battery comprising an electrode body having sides, and an exterior body including an inner region configured to house the electrode body, and the battery includes an electrode terminal for a cathode and an electrode terminal for an anode, each placed so as to extend from the inner region to an outer region of the exterior body,
each electrode terminal includes an inner current collecting portion placed in the inner region and connected to an electrode tab of the electrode body, and an outer current collecting portion placed in the outer region, and
the battery includes at least a first electrode body and a second electrode body as a plurality of the electrode bodies,
the first electrode body includes an electrode tab P,
the second electrode body includes an electrode tab R having an opposite polarity to the electrode tab P,
the electrode tab P and the electrode tab Rare connected in the inner region,
the inner current collecting portions of the cathode terminal and the anode terminal are respectively placed on the identical side of the electrode body,
each electrode terminal includes an intermediate portion between the inner current collecting portion and the outer current collecting portion, and the intermediate portion is placed in a sealing region of the exterior body, and
1.2≤W1/W2≤5.0
1<W1/W3≤5
1.2≤W1/W4≤5.0,
wherein W1 is the width of the inner current collecting portion, W2 is the width of the outer current collecting portion, W3 is the width of the electrode tab connected to the inner current collecting portion, and W4 is the width of the intermediate portion,
wherein the exterior body is a laminated film,
wherein an insulating protective layer is provided on at least two side surfaces of each electrode body in the inner region, wherein the width of a cathode layer between each side surface is smaller than the width of an anode layer between each side surface, and the insulating protective layer is wider at portions contacting each cathode layer than portions contacting each anode layer.