US 12,463,226 B2
Fuel cell cooling
Torsten Brandt, Forchheim (DE); Michael Braunecker, Nuremberg (DE); Frank Bärnreuther, Neustadt Aisch (DE); and Arno Mattejat, Erlangen (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 17/910,816
Filed by Siemens Energy Global GmbH & Co. KG, Bayern (DE)
PCT Filed Feb. 18, 2021, PCT No. PCT/EP2021/053978
§ 371(c)(1), (2) Date Sep. 11, 2022,
PCT Pub. No. WO2021/228445, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 10 2020 205 871.7 (DE), filed on May 11, 2020.
Prior Publication US 2023/0124648 A1, Apr. 20, 2023
Int. Cl. H01M 8/0258 (2016.01); H01M 8/04029 (2016.01); H01M 8/10 (2016.01)
CPC H01M 8/0258 (2013.01) [H01M 8/04029 (2013.01); H01M 2008/1095 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A bipolar plate for an electrochemical cell, comprising:
a flow space which is disposed between a first plate element and a second plate element and which comprises a flow inlet and a flow outlet for a coolant that flows through the flow space,
wherein each plate element comprises a contact plane for contact with the respective other plate element of the first and second plate elements and, between the flow inlet and the flow outlet, each plate element comprises a multitude of elevations which project out of the contact plane and face away from the respective other plate element and which define openings toward the contact plane, and
wherein first flow channels are formed by the openings of the elevations in that the elevations of the first and the second plate elements are offset with respect to one another,
wherein each elevation of the multitude of elevations of the first plate element at least partly overlaps with at least one elevation of the multitude of elevations of the second plate element,
wherein a direction-dependent flow resistance is established in the first flow channels of the bipolar plate in that the elevations on the plate elements are disposed in vertices of regular triangles, and
wherein the plate elements are arranged offset with respect to one another such that, in a projection onto the contact plane, a center of a select elevation of the first plate element is disposed within but not centered in an associated triangle of the regular triangles, wherein the associated triangle is formed by respective centers of three elevations of the second plate element that are closest to the select elevation of the first plate element.