Bipolar plate, retention sample for a bipolar plate, system, and method for producing and testing a bipolar plate

1. A bipolar plate configured for an electrochemical system, comprising:

two separator plates which are connected to one another, at least one of the separator plates comprising:

a plate body; and

at least one tab which is formed in one piece with the plate body and separable from the plate body via a predetermined breaking point;

wherein the at least one tab has a first coding which is associated with the respective separator plate, and said separator plate has a second coding which corresponds to the first coding on the at least one tab.

2. The bipolar plate according to claim 1 , comprising at least one through-opening for the passage of a fluid, and the at least one tab being arranged on an inner edge of the at least one through-opening or on an outer edge of the plate body.

3. The bipolar plate according to claim 1 , wherein a stiffening structure, which extends at least partially along the predetermined breaking point, for separating the at least one tab in a defined manner along the predetermined breaking point is arranged on at least one side of the predetermined breaking point.

4. The bipolar plate according to claim 3 , wherein the at least one tab has at least one further stiffening structure for stiffening the at least one tab.

5. The bipolar plate according to claim 4 , wherein the at least one further stiffening structure is configured as an embossed structure, a bead, or a group of embossings.

6. The bipolar plate according to claim 1 , wherein the predetermined breaking point comprises an indentation and/or a perforation.

7. The bipolar plate according to claim 1 , wherein the respective coding comprises an inscription, a coloured pattern, a punched pattern and/or an embossed pattern.

8. The bipolar plate according to claim 1 , wherein the at least one tab has at least one process monitoring area.

9. The bipolar plate according to claim 8 , wherein the at least one process monitoring area has a coating, a surface treatment, and/or a structuring.

10. The bipolar plate according to claim 1 , wherein the at least one tab has a positioning opening for receiving a centering pin or for position control.

11. The bipolar plate according to claim 1 , wherein each of the two separator plates comprises one of the at least one tab, and the tabs at least partially overlapping in a direction perpendicular to a plate plane of the bipolar plate.

12. A retention sample of a bipolar plate for an electrochemical system, comprising:

a tab with a first breaking edge which can be separated from the bipolar plate via a predetermined breaking point, the tab having a process monitoring area and/or a first coding which is associated with the bipolar plate and/or with a separator plate of the bipolar plate.

13. A system, comprising the retention sample according to claim 12 and the associated bipolar plate for an electrochemical system, which comprises:

two separator plates which are connected to one another, the bipolar plate having a second breaking edge which has a shape complementary to the first breaking edge.

14. A method for producing a bipolar plate for an electrochemical system, comprising the steps of:

providing a plate;

forming a first separator plate having a plate body and at least one tab formed in one piece with the plate body;

introducing a material weakening into the first separator plate so as to form a predetermined breaking point, via which the tab can be separated from the plate body;

providing a second separator plate; and

forming the bipolar plate by connecting the first separator plate to the second separator plate;

wherein the at least one tab has a first coding which is associated with the first separator plate, and said first separator plate has a second coding on the plate body which corresponds to the first coding on the at least one tab.

15. The method according to claim 14 , comprising the additional step of:

separating the tab from the first separator plate along the predetermined breaking point, by applying energy using laser or induction, or by separating the tab mechanically.

16. A bipolar plate configured for an electrochemical system, comprising:

two separator plates which are connected to one another, at least one separator plate of the two separator plates comprising:

a plate body; and

at least one tab which is formed in one piece with the plate body of the separator plate and is separable from the plate body via a predetermined breaking point;

wherein the at least one tab has a first coding which is associated with the bipolar plate, and the bipolar plate has a second coding which corresponds to the first coding on the at least one tab.