Terminal bipolar plate for an electrochemical system, plate assembly, and electrochemical system

Patent metadata

Field	Value
Publication number	US-2022093941-A1
Application number	US-202117448185-A
Country	US
Kind code	A1
Filing date	Sep 20, 2021
Priority date	Sep 21, 2020
Publication date	Mar 24, 2022
Grant date	—

Abstract

A plate assembly for an electrochemical system, comprising an end plate, a first separator plate which adjoins the end plate and which has a plate plane, a second separator plate which adjoins the first separator plate, the second separator plate having at least one media-guiding second through-opening, wherein an orthogonal projection of the second through-opening onto the first separator plate perpendicular to the plate plane defines a projection area, wherein the first separator plate has in the region of the projection area no through-opening or a first through-opening, the area of which is less than 20% of the area of the second through-opening.

First claim

1 . A plate assembly for an electrochemical system, comprising
an end plate, a first separator plate which adjoins the end plate and which has a plate plane, a second separator plate which adjoins the first separator plate, the second separator plate having at least one media-guiding second through-opening, wherein an orthogonal projection of the second through-opening onto the first separator plate perpendicular to the plate plane defines a projection area, wherein the projection area of the first separator plate has no through-opening or a first through-opening, the area of which is less than 20% of the area of the second through-opening.

2 . The plate assembly according to claim 1 , wherein a plate body of the end plate is at least partially or mainly made of a polymer material, a plate body of the first separator plate and a plate body of the second separator plate each being made of a metal material.

3 . The plate assembly according to claim 1 , wherein the first separator plate has at least one embossed structure in the region of the projection area.

4 . The plate assembly according to claim 1 , wherein at least one media-guiding structure is arranged in the region of the projection area.

5 . The plate assembly according to claim 4 , wherein the media-guiding structure extends into the second through-opening or through the second through-opening.

6 . The plate assembly according to claim 1 , comprising at least one support element for supporting the first separator plate against the end plate, and the support element arranged in the region of the projection area.

7 . The plate assembly according to claim 6 , wherein the support element is formed integrally with the first separator plate or the end plate or is a separate element.

8 . The plate assembly according to claim 1 , wherein the first through-opening is a vent opening.

9 . The plate assembly according to claim 8 , wherein the end plate has an outlet opening, which is fluidically connected to the first through-opening.

10 . The plate assembly according to claim 1 , wherein the first separator plate and the second separator plate are connected to one another by welded joints, laser-welded joints, or solder joints.

11 . The plate assembly according to claim 1 , wherein the second separator plate has a second sealing element, which surrounds the second through-opening, and the first separator plate has a first spring element, which surrounds the projection area of the second through-opening on the first separator plate.

12 . An electrochemical system, comprising a plate assembly according to claim 1 and a further end plate that has a plurality of media ports, wherein the media ports of the further end plate are fluidically connected to second through-openings of the second separator plate, the first separator plate and the second separator plate being arranged between the two end plates.

13 . A terminal bipolar plate for an electrochemical system, comprising
a first separator plate which has a plate plane, a second separator plate which adjoins the first separator plate, the second separator plate having at least one media-guiding second through-opening, wherein an orthogonal projection of the second through-opening onto the first separator plate perpendicular to the plate plane defines a projection area, wherein the projection area of the first separator plate has no through-opening or a first through-opening, the area of which is less than 20% of the area of the second through-opening.

Assignees

• Reinz Dichtungs Gmbh

Inventors

• Speidel André

Classifications

• H01M8/04029

  Heat exchange using liquids · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H01M8/0202

  Collectors; Separators, e.g. bipolar separators; Interconnectors · CPC title

• H01M8/0271 Primary

  Sealing or supporting means around electrodes, matrices or membranes · CPC title

• H01M8/188

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