Separator plate and electrochemical cell

Patent metadata

Field	Value
Publication number	US-2023058717-A1
Application number	US-202217820842-A
Country	US
Kind code	A1
Filing date	Aug 18, 2022
Priority date	Aug 20, 2021
Publication date	Feb 23, 2023
Grant date	—

Abstract

A separator plate for an electrochemical system, comprising a first and a second metal layer arranged with flat sides adjacent to each other. The first and the second metal layer each having at least one through-opening for supplying and/or discharging a fluid. Circumferential edges of the through-openings are formed at least in part by a half-bead. An open edge of the half-bead is angled so as to form a collar.

First claim

1 . A separator plate for an electrochemical system, comprising:
a first and a second metal layer which are arranged with a respective one of their flat sides adjacent to each other, wherein the first and the second metal layer each have at least one through-opening for supplying and/or discharging a fluid, said through-openings being arranged in pairs at least substantially coaxially with respect to their axial direction of passage and form a passage opening for the fluid to pass through the separator plate, wherein the circumferential edges of the through-openings of a respective pair of through-openings have a half-bead which at least in part forms the circumferential edge of the respective through-opening and projects out of the layer plane of the respective metal layer in a direction away from the adjacent metal layer, wherein the open edge of the half-bead of each of the metal layers is angled in the direction of the layer plane of the respective metal layer so as to form a collar.

2 . The separator plate according to claim 1 , wherein for at least one of the through-openings, a sealing bead which extends around the respective through-opening is arranged on the side of the half-bead remote from the respective through-opening.

3 . The separator plate according to claim 2 , wherein for at least one of the through-openings, the sealing bead has along its course, at least in a first portion, at least one passage which in cross-section extends through the sealing bead from one side of the sealing bead to the opposite side of the sealing bead, wherein the collar is formed only in portions adjacent to the passage and/or adjacent to the first portion.

4 . The separator plate according to claim 1 , wherein the outer circumferential edge of the first metal layer and the outer circumferential edge of the second metal layer each have a half-bead which at least in part forms the respective circumferential edge and projects out of the layer plane of the respective metal layer in a direction away from the adjacent metal layer, wherein the open edge of this half-bead of each of the metal layers is angled in the direction of the layer plane of the respective metal layer so as to form a collar.

5 . The separator plate for an electrochemical system, comprising:
a first and a second metal layer which are arranged with a respective one of their flat sides adjacent to each other, wherein the outer circumferential edge of the first metal layer and the outer circumferential edge of the second metal layer each have a half-bead which at least in part forms the respective circumferential edge and projects out of the layer plane of the respective metal layer in a direction away from the adjacent metal layer, wherein the open edge of the half-bead of each of the metal layers is angled in the direction of the layer plane of the respective metal layer so as to form a collar.

6 . The separator plate according to claim 1 , wherein the first and the second metal layer enclose between them a cooling region for guiding a cooling medium along a flat side of the metal layers.

7 . The separator plate according to claim 1 , wherein the first and the second metal layer each have, on the flat side thereof remote from the adjacent metal layer, channel structures for forming a flow field for a fluid.

8 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the collar of the first metal layer and the collar of the second metal layer are arranged along at least part of the respective circumferential edge in an adjacent and overlapping manner.

9 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the collar of the first and/or the second metal layer projects at least in part beyond the layer plane of the respective metal layer.

10 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the flank of the half-bead of the first and/or the second metal layer extends over more than 50% of its length outside of the first portion, at an angle α to the layer plane of the respective metal layer, where 20°≤α≤80°.

11 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the collar of the first and/or the second metal layer extends over more than 50% of its length, outside of the first portion, at an angle β to the layer plane of the respective metal layer, where 70°≤β≤130°.

12 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the collar of the first and/or the second metal layer along the circumferential edge of the through-opening and/or along the outer circumferential edge forms at least in part the boundary of the fluid-guiding through-opening and/or of the outer circumferential edge.

13 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the collar of the respective metal layer has one or more slots starting from the layer edge surrounding the through-opening or the outer circumferential edge in the first and/or second metal layer.

14 . The separator plate according to claim 13 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the slots extend substantially perpendicular to the layer edge.

15 . The separator plate according to claim 13 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the slots have a length that is less than or equal to the width of the respective collar.

16 . The separator plate according to claim 13 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the slots are arranged along the circumferential edge.

17 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, at least in part or all the way round, the ends of the collars of substantially coaxially arranged through-openings and/or of the outer circumferential edges of the first and the second metal layer overlap one another so as to form at least one overlap region and/or are arranged offset from one another in a direction perpendicular to the layer plane of the first and/or the second layer.

18 . The separator plate according to claim 1 , wherein for at least one of the through-openings and/or for the outer circumferential edges, the collars of the first metal layer and the second metal layer are not arranged relative to one another in a form-fitting manner.

19 . The separator plate according to claim 1 , wherein for through-openings arranged substantially coaxial to one another and/or for the outer circumferential edges, the flank of the half-bead of the first metal layer and the flank of the half-bead of the second metal layer are arranged at different positions perpendicular to the bead running direction, which extends along the respective circumferential edge of the through-opening and/or along the outer circumferential edge.

20 . An electrochemical system comprising a plurality of separator plates claim 1 , wherein the plurality of separator plates are stacked perpendicular to the layer plane of the first and/or to the layer plane of the second metal layer.

Assignees

• Reinz Dichtungs Gmbh

Inventors

• Glueck Rainer
• Kinder Thomas
• Gehring Horst
• Stoehr Thomas

Classifications

• H01M8/0267

  having heating or cooling means, e.g. heaters or coolant flow channels · CPC title

• C25B9/75

  having bipolar electrodes · CPC title

• C25B9/60 Primary

  Constructional parts of cells · CPC title

• H01M8/0254

  corrugated or undulated · CPC title

• H01M8/188

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title