Separator plate for an electrochemical system

Patent metadata

Field	Value
Publication number	US-2024055619-A1
Application number	US-202318447181-A
Country	US
Kind code	A1
Filing date	Aug 9, 2023
Priority date	Aug 10, 2022
Publication date	Feb 15, 2024
Grant date	—

Abstract

A separator plate for an electrochemical system comprising a first individual plate which comprises two first channels for conducting media which run next to one another and which are separated from one another at least in sections by a web formed between the first channels. The web comprising a lowered portion and a rear side of the base of the lowered portion is connected to a rear side of the base of the second channel in the contact zone of the individual plates via a welded connection. The welded connection comprises a first end region and a first curved portion, wherein the first curved portion runs, and is curved, in such a way that a virtual straight line running perpendicularly through the first end region intersects the welded connection at least two times.

First claim

1 . A separator plate for an electrochemical system, comprising a first individual plate and a second individual plate which is connected to the first individual plate, wherein the two individual plates contact one another in a contact zone,
wherein the first individual plate comprises two first channels for conducting media which are formed into the first individual plate, which run next to one another and which are separated from one another at least in sections by a web formed between the first channels; wherein the second individual plate comprises a second channel for conducting media which is formed into the second individual plate; and wherein the web formed between the first channels and the second channel formed into the second individual plate are configured, and arranged, in such a way that a projection of the second channel onto the first individual plate perpendicular to the planar face plane of the first individual plate crosses the web along a crossing region of the web; wherein the web is lowered in the crossing region of the web, such that the first channels running on either side of the web are fluidically connected by way of the lowered portion of the web, and wherein a rear side of the base of the lowered portion, said rear side facing the second individual plate, is connected to a rear side of the base of the second channel, said rear side facing the first individual plate, in the contact zone of the individual plates via a welded connection, wherein the welded connection comprises a first end region and a first curved portion, wherein the first curved portion runs, and is curved, in such a way that a virtual straight line running perpendicularly through the first end region intersects the welded connection at least two times, and/or wherein the welded connection comprises a second end region and a second curved portion, wherein the second curved portion runs, and is curved, in such a way that a virtual second straight line running perpendicularly through the second end region intersects the welded connection at least two times.

2 . The separator plate according to claim 1 , wherein the first end region adjoins the first curved portion or is part of the first curved portion and/or wherein the second end region adjoins the second curved portion or is part of the second curved portion.

3 . The separator plate according to claim 1 , wherein the first curved portion at least partially surrounds the first end region and/or wherein the second curved portion at least partially surrounds the second end region.

4 . The separator plate according to claim 3 , wherein the first end region lies within a region which is enclosed by the first curved portion and/or wherein the second end region lies within a region which is enclosed by the second curved portion.

5 . The separator plate according to claim 1 , wherein the first end region and/or the second end region comprises a rectilinear portion or has a rectilinear profile.

6 . The separator plate according to claim 1 , wherein the first curved portion and/or the second curved portion are of circular, oval, elliptical, hairpin or spiral shape at least in sections.

7 . The separator plate according to claim 1 , wherein the welded connection comprises a rectilinear middle portion which adjoins the first curved portion or the first end portion and/or which adjoins the second end portion or the second curved portion.

8 . The separator plate according to claim 1 , wherein at least one of the end regions and the associated curved portion transition into one another by way of a continuous welded portion.

9 . The separator plate according to claim 1 , wherein the welded connection is interrupted, in such a way that at least one of the end regions and the associated curved portion are separated from one another and not connected to one another.

10 . The separator plate according to claim 1 , wherein the second channel comprises at least one second channel widening in a second region adjoining the crossing region, wherein the second individual plate is connected to the first individual plate in the region of the second channel widening by the welded connection.

11 . The separator plate according to claim 1 , wherein at least one of the first channels comprises a first channel widening in a first region adjoining the crossing region, wherein the first individual plate is connected to the second individual plate in the region of the first channel widening by the welded connection.

12 . The separator plate according to claim 11 , wherein each first channel comprises said first channel widening, wherein the two first channel widenings are arranged offset relative to one another in a direction of extent of the first channels.

13 . The separator plate according to claim 11 , wherein at least one of the first channels is delimited by said web and a further web, wherein the further web comprises a concave portion for formation of the first channel widening.

14 . The separator plate according to claim 11 , wherein the first channel widening and the second channel widening at least partially overlap in the contact zone, and the welded connection is provided in the region of overlap of said channel widenings.

15 . The separator plate according to claim 10 , wherein the first channel widening and the second channel widening at least partially overlap in the contact zone, and the welded connection is provided in the region of overlap of said channel widenings.

16 . The separator plate according to claim 1 , wherein each individual plate comprises at least one passage opening for passage of a fluid, an electrochemically active region and a distribution or collection region which fluidically connects the passage opening to the electrochemically active region, wherein the first channels are arranged in the distribution or collection region of the first individual plate and the second channel is arranged in the distribution or collection region of the second individual plate.

17 . The separator plate according to claim 1 , wherein the welded connection is a laser welded connection.

18 . The separator plate according to claim 1 , wherein the welded connection is formed as a continuous welded connection.

19 . The separator plate according to claim 1 , wherein the welded connection has a shape which is formed in such a way that it can be formed without stoppage or with at most two stoppages of a welding tool and/or welding laser beam.

20 . An electrochemical system comprising a plurality of stacked separator plates according to claim 1 .

Assignees

• Reinz Dichtungs Gmbh

Inventors

• Senf Felix
• Luksch Christian
• Speidel Andre

Classifications

• H01M8/0297

  Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other (H01M8/0271 takes precedence) · CPC title

• H01M8/0254

  corrugated or undulated · CPC title

• H01M8/0206

  Metals or alloys · CPC title

• C25B9/77

  having diaphragms · CPC title

• H01M8/0258 Primary

  characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant · CPC title