US 11,811,105 B2
Battery cell, cell stack, and redox flow battery
Hayato Fujita, Osaka (JP); and Masahiro Kuwabara, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/425,098
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jan. 24, 2020, PCT No. PCT/JP2020/002597
§ 371(c)(1), (2) Date Jul. 22, 2021,
PCT Pub. No. WO2020/158625, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-014462 (JP), filed on Jan. 30, 2019.
Prior Publication US 2022/0109166 A1, Apr. 7, 2022
Int. Cl. H01M 8/0263 (2016.01); H01M 8/18 (2006.01)
CPC H01M 8/0263 (2013.01) [H01M 8/188 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A battery cell that includes an electrode and a bipolar plate arranged opposing the electrode, and has a supply edge to which an electrolyte solution is supplied, and a discharge edge from which the electrolyte solution is discharged, in a plan view from a direction in which the electrode and the bipolar plate overlap each other, the battery cell comprising:
a plurality of meandering flow paths each of which has an introduction port that is in connection with the supply edge, and a discharge port that is in connection with the discharge edge, and is serially formed from the introduction port to the discharge port, the plurality of meandering flow paths being arranged in parallel in a widthwise direction,
the plurality of meandering flow paths including a first meandering flow path and a second meandering flow path, each of the first and second meandering flow paths having:
an introduction-side section extending from the introduction port toward a discharge edge side, and having an end portion on the discharge edge side;
a turn-back section that is turned back from the end portion on the discharge edge side of the introduction-side section toward a supply edge side, and has an end portion on the supply edge side; and
a discharge-side section extending from the end portion on the supply edge side of the turn-back section toward the discharge edge side, and reaching the discharge port,
the discharge-side section of the first meandering flow path being adjacent to the introduction-side section of the second meandering flow path,
the turn-back section having at least one of:
an inclined portion inclining with respect to a lengthwise direction and extending in an oblique direction from the end portion side of the introduction-side section toward the end portion side of the discharge-side section; and
a stepped portion in which a lateral section extending in the widthwise direction and a vertical section extending in the lengthwise direction are alternately continuous with each other, the stepped portion being formed in a step shape from the end portion side of the introduction-side section toward the end portion side of the discharge-side section,
wherein the lengthwise direction is a direction from the supply edge toward the discharge edge, and the widthwise direction is a direction parallel to the supply edge and the discharge edge.