Bipolar plate for use in an electrochemical device

Patent metadata

Field	Value
Publication number	US-11618956-B2
Application number	US-201916689526-A
Country	US
Kind code	B2
Filing date	Nov 20, 2019
Priority date	Nov 27, 2018
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A bipolar plate for use in an electrochemical device is proposed, in which a flow duct runs between two outer boundary surfaces and extends from a peripheral fluid inlet to a peripheral fluid outlet. As a result, very good cooling of electrochemical cells via a bipolar plate which is in surface contact therewith can be achieved.

First claim

What is claimed is:

1. A bipolar plate for use in an electrochemical device comprising:
a first boundary surface; and
a second boundary surface arranged parallel to and facing the first boundary surface,
wherein the first and second boundary surfaces are arranged at a distance from each other, enclosing an intermediate space,
wherein the intermediate space contains at least one flow duct which is connected to a peripherally arranged fluid inlet and a peripherally arranged fluid outlet and is arranged at least in an encircling manner in the intermediate space,

wherein the at least one flow duct has a first flow path and a second flow path,
wherein the first flow path is parallel to the second flow path, and the first flow path and the second flow path are not connected to one another,
wherein the at least one flow duct extends at least once about a center point, and
wherein a first coolant flow within the first flow path flows and a second coolant flow within the second flow path flow in one of a same direction or opposite directions
wherein at least one heat pipe arranged in the intermediate space, wherein the at least one flow duct is thermally coupled to the at least one heat pipe.

2. The bipolar plate according to claim 1 , wherein the at least one flow duct extends spirally at least in regions in the intermediate space.

3. The bipolar plate according to claim 2 , wherein the at least one flow duct has a first strand and an adjoining second strand, wherein the first strand is curved in a first direction and the second strand in an opposite second direction.

4. The bipolar plate according to claim 1 , wherein:
the first boundary surface is formed on a first plate like component;
the second boundary surface is formed on a second plate like component; and the first and second plate like components enclose the at least one flow duct, and are connected to each other peripherally at least in regions.

5. The bipolar plate according to claim 4 , wherein the at least one flow duct is formed by at least one depression which is arranged in at least one of the first and second plate like components.

6. The bipolar plate according to claim 1 , wherein the bipolar plate is produced by a generative manufacturing method, and the at least one flow duct is integrated in the bipolar plate without joining points.

7. An electrochemical device comprising:
a plurality of electrochemical cells; and
a plurality of bipolar plates according to claim 1 , wherein the electrochemical cells and the bipolar plates are provided in an alternating sequence.

8. The electrochemical device according to claim 7 , wherein the cells are electrolysis cells.

9. The electrochemical device according to claim 7 , further comprising at least one bipolar plate formed without a flow duct.

10. The electrochemical device according to claim 7 , wherein the cells are matrix cells.

11. The electrochemical device according to claim 7 , wherein the at least one flow duct has two or more flow paths, wherein the electrochemical device is configured for a coolant to flow through the flow paths in opposite directions.

12. A vehicle comprising at least one electrochemical device according to claim 7 .

Assignees

• Airbus Defence & Space Gmbh

Inventors

• Eck Thomas
• Jehle Walter
• Lohmiller Winfried

Classifications

• H01M2250/20

  Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M8/04074

  Heat exchange unit structures specially adapted for fuel cell · CPC title

• C25B9/67

  Heating or cooling means · CPC title

• H01M8/0267 Primary

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

• Y02E60/50

  Fuel cells · CPC title