Electrochemical cell stack unit

Abstract

The invention comprises an electrochemical cell stack unit (10) consisting of electrochemical cells, which can be used, for example, as a fuel cell unit for electrochemically generating electrical energy from hydrogen and / or as an electrolysis cell unit for generating hydrogen and oxygen from electrical energy.

Description

[0001] Description

[0002] title

[0003] Electrochemical

[0004] The invention relates to an electrochemical cell stacking unit / cell unit consisting of electrochemical cells, which can be used, for example, as a fuel cell unit for the electrochemical generation of electrical energy from hydrogen and / or as an electrolysis cell unit for the generation of hydrogen and oxygen from electrical energy.

[0005] State of the art

[0006] Electrochemical cell stacking units are used in a wide variety of stationary and mobile applications.

[0007] In electrochemical cell stacking units, a large number of individual electrochemical cells are arranged on top of each other as a cell stack, so that cell stacking units can generally be considered as galvanic energy generators or energy converters that convert continuously supplied fuel and oxidant into electrical energy and vice versa by means of redox reactions at an anode and cathode.

[0008] Various technology options are available for electrolysis and fuel cells, in particular PEM electrolysis or PEM fuel cells, where PEM stands for Proton Exchange Membrane; alternatively, AEM (anion exchange membrane), SOEC (solid oxide electrolysis cell), or AEL (liquid alkaline electrolysis). The electrochemical cell stack of a cell stack unit is typically bounded by two high-voltage contact plates, each of which includes a high-voltage connection for tapping an output voltage.

[0009] For example, the high-voltage contact plate with the positive high-voltage connection is located directly above and the high-voltage contact plate with the negative high-voltage connection is located directly below the end of the cell stack. It is also possible that the high-voltage contact plate with the negative high-voltage connection is located directly above and the high-voltage contact plate with the positive high-voltage connection is located directly below the end of the cell stack.

[0010] In certain embodiments, the electrochemical cell stack may exhibit changes in length due to operational factors, so that, according to the cell stack height, the distance between the two high-voltage terminals, in particular the distance between the positive high-voltage terminal and the negative high-voltage terminal, also varies.

[0011] Since the spacing of the high-voltage connections is therefore not constant, a very complex, space-consuming and costly busbar assembly is required to carry the current from the electrochemical cell stack.

[0012] Disclosure of the invention

[0013] According to the first aspect of the invention, an electrochemical cell stacking unit is presented. The electrochemical cell stacking unit comprises:

[0014] - a first end plate arrangement comprising a first end plate, a first insulator plate and a first high-voltage contact plate, wherein the first high-voltage contact plate has a first high-voltage terminal,

[0015] - a second end plate arrangement comprising a second end plate, a second insulator plate and a second high-voltage contact plate, wherein the second high-voltage contact plate has a second high-voltage terminal,

[0016] - an adjustment plate arrangement comprising a movable adjustment plate and a high-voltage current collector plate, wherein the adjustment plate arrangement is arranged between the first end plate arrangement and the second end plate arrangement,

[0017] - an electrochemical cell stack with a first lower end region and a second upper end region, wherein the electrochemical cell stack is extendable, in particular length-variable, along a longitudinal axis of the electrochemical cell stack, wherein the first lower end region is electrically connected to the first high-voltage contact plate and the second upper end region is electrically connected to the high-voltage current collector plate,

[0018] - a plurality of elastic elements for exerting pressure on the electrochemical cell stack and for performing a stroke compensation as a result of a change in length of the electrochemical cell stack, wherein the elastic elements are arranged between the adjusting plate arrangement and the second end plate arrangement,

[0019] - a plurality of clamping elements, wherein the first end plate arrangement, the second end plate arrangement, the adjustable plate arrangement, the electrochemical cell stack and the plurality of elastic elements are held in place by the plurality of clamping elements, wherein the plurality of clamping elements are in a tensioned state and the plurality of elastic elements are in a compressed state,

[0020] - at least one electrical current conductor for the transmission of electrical energy, in particular for the transport of a high-voltage current, between the high-voltage current collector plate of the adjusting plate arrangement and the second high-voltage terminal of the second high-voltage contact plate of the second end plate arrangement, wherein the at least one electrical current conductor is arranged between the high-voltage current collector plate and the second high-voltage terminal,

[0021] - wherein at least one electrical current conductor is length-variable during the execution of the stroke compensation of the electrochemical cell stack.

[0022] The core idea of ​​the invention is therefore to tap the output voltage not directly above the height-adjustable end of the cell stack, as in the prior art, but to conduct the current at the cell stack end further via the adjustment plate arrangement and via the at least one electrical current conductor into the end plate arrangement, so that the output voltage can be tapped, in particular, at the high-voltage contact plate of the end plate arrangement. By conducting the current further via the adjustment plate arrangement and the at least one electrical current conductor, the second high-voltage connection for tapping the output voltage is, in particular, moved further upwards, i.e., into the end plate arrangement above the electrochemical cell stack.

[0023] In the present invention, the first high-voltage connection is preferably configured as a negative high-voltage connection, and the second high-voltage connection is preferably configured as a positive high-voltage connection. Conversely, it is also possible that the first high-voltage connection is configured as a positive high-voltage connection and the second high-voltage connection as a negative high-voltage connection.

[0024] Relocating the positive high-voltage connection to the end plate arrangement above the electrochemical cell stack has the particular advantage over the prior art that a constant distance between the two high-voltage connections, in particular a constant distance between the positive high-voltage connection and the negative high-voltage connection, can be ensured.

[0025] Therefore, a highly complex, space-consuming, and costly assembly of multiple busbar systems is no longer required to conduct the current from the electrochemical cell stack. The current can be conducted to the outside very simply via the high-voltage connections of the end plate assemblies.

[0026] Further features and advantages of the invention are given below.

[0027] To enable the current to be conducted further at the end of the cell stack via the adjustment plate arrangement, a first embodiment preferably provides that the movable adjustment plate is electrically conductive in a contact area with the electrical current conductor or comprises an electrically conductive material, wherein the contact area is fluid- and pressure-tight and electrically insulated from the external environment. Alternatively, as is common in the prior art, the movable adjustment plate can also be non-electrically conductive and not comprise an electrically conductive material.

[0028] However, in order to still be able to transmit the current at the end of the cell stack, a second embodiment preferably provides that the at least one electrical current conductor is directly connected to a current collector of the high-voltage current collector plate to establish a high-voltage connection.

[0029] The basic idea of ​​the invention is to provide a simple and cost-effective electrical current conductor for the transmission of electrical energy, in particular for the transport of a high-voltage current, between the high-voltage current collector plate of the adjusting plate arrangement and the second high-voltage connection of the second high-voltage contact plate of the second end plate arrangement.

[0030] According to the invention, at least one electrical current conductor is arranged between the high-voltage current collector plate and the second high-voltage connection.

[0031] Furthermore, according to the invention, it is provided that the length of at least one electrical current conductor is variable during the execution of the stroke compensation of the electrochemical cell stack.

[0032] Preferably, at least one electrical current conductor is designed as an electrically conductive high-voltage spring.

[0033] Preferably, in a further embodiment, at least one electrical current conductor is designed as a flexible high-voltage power cable.

[0034] Preferably, in a further embodiment, the at least one electrical current conductor is designed as a multi-layered flexible high-voltage rail. Preferably, in a further embodiment, the at least one electrical current conductor is designed as a deflectable high-voltage rail system.

[0035] Preferably, in a further embodiment, at least one electrical current conductor is designed as a flexible grounding strap.

[0036] Further advantages, features, and details of the invention will become apparent from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination.

[0037] The invention will be explained in more detail below with reference to the attached drawings.

[0038] Each schematically illustrates:

[0039] Figure 1 shows a perspective view of an electrochemical cell stacking unit according to a first embodiment of the present invention,

[0040] Figure 2 shows a front view of an electrochemical cell stacking unit according to the first embodiment of the present invention with several electrically conductive high-voltage springs,

[0041] Figure 3 shows a front view of an electrochemical cell stacking unit according to the first embodiment of the present invention with several flexible high-voltage power cables,

[0042] Figure 4 shows a front view of an electrochemical cell stacking unit according to the second embodiment of the present invention with an electrically conductive high-voltage spring, Figure 5 shows a view of a first end plate arrangement according to a further embodiment of the present invention and

[0043] Figure 6 shows a view of a second end plate arrangement according to a further embodiment of the present invention.

[0044] Fig. 1 shows a perspective view of an electrochemical cell stacking unit 10 according to a first embodiment of the present invention.

[0045] The electrochemical cell stacking unit 10 comprises a first end plate arrangement 40, a second end plate arrangement 60, an adjustable plate arrangement 50, an electrochemical cell stack 20 with a first lower end region 21 and a second upper end region 22, and a plurality of clamping elements 90. The electrochemical cell stacking unit 10 according to the invention can, in principle, be used as a fuel cell unit for the electrochemical generation of electrical energy from hydrogen and / or as an electrolysis cell unit for the generation of hydrogen and oxygen from electrical energy. Thus, the electrochemical cell stacking unit 10 according to the invention can generally be considered a galvanic energy generator or energy converter that converts continuously supplied fuel and oxidant into electrical energy and vice versa by means of redox reactions at an anode and cathode.In the figures shown, the electrochemical cell stack 20 is specifically designed as an FC cell stack, which is made up of individual electrochemical cells stacked on top of each other.

[0046] Fig. 2 shows a front view of an electrochemical cell stacking unit 10 according to the first embodiment of the present invention. The electrochemical cell stack 20 is extendable, in particular its length is variable, along a longitudinal axis L of the electrochemical cell stack 20.

[0047] The electrochemical cell stack 20 is composed of individual electrochemical cells stacked on top of each other, which can expand and contract during operation due to pressure and heat. The expansion of the individual electrochemical cells, in turn, leads to an extension or contraction of the electrochemical cell stack 20. In other words, the electrochemical cell stack 20 exhibits changes in length due to operational conditions, which are compensated for by a multitude of elastic elements 80.

[0048] The elastic elements 80 serve in particular to exert pressure on the electrochemical cell stack 20 and to compensate for stroke changes resulting from the length changes of the electrochemical cell stack 20. The elastic elements 80 compress the electrochemical cell stack 20, thus compensating for the loss of tension due to settling effects over the service life. In the figures shown, the elastic elements 80 are designed as tension springs by way of example.

[0049] As can be clearly seen in Fig. 2, the electrochemical cell stacking unit 10 further comprises a plurality of clamping elements 90. The clamping elements 90 can be designed, for example, as tie rods, studs, strapping bands or the like.

[0050] In the present invention, the clamping elements 90 are preferably designed as strapping tension bands with fastening ends 95, wherein the strapping tension bands 90 each surround the first end plate arrangement 40 and the fastening ends 95 of the strapping tension bands 90 are each connected to the second end plate arrangement 60, so that the first end plate arrangement 40, the second end plate arrangement 60, the adjusting plate arrangement 50, the electrochemical cell stack 20 and the plurality of elastic elements 80 are held by the plurality of strapping tension bands 90, wherein the plurality of strapping tension bands 90 are in a tensioned state and the plurality of elastic elements 80 are in a compressed state.

[0051] The first end plate assembly 40 comprises a first end plate 41, a first insulator plate 42, and a first high-voltage contact plate 43, wherein the first high-voltage contact plate 43 has a first high-voltage terminal 44. The second end plate assembly 60 comprises a second end plate 61, a second insulator plate 62, and a second high-voltage contact plate 63, wherein the second high-voltage contact plate 63 has a second high-voltage terminal 64.

[0052] In the present invention, the first high-voltage connection 44 is preferably configured as a negative high-voltage connection and the second high-voltage connection 64 is preferably configured as a positive high-voltage connection. Conversely, it is also possible that the first high-voltage connection 44 is configured as a positive high-voltage connection and the second high-voltage connection 64 as a negative high-voltage connection.

[0053] The distance between the first high-voltage terminal 44, in particular the positive high-voltage terminal, and the second high-voltage terminal 64, in particular the negative high-voltage terminal, is constant.

[0054] In other words, the distance between the first high-voltage terminal 44 and the second high-voltage terminal 64 does not vary at any time during operation, especially during current transmission and tapping of the output voltage.

[0055] In Figures 1 to 7, the high-voltage connections 44, 64 are shown in a lateral area of ​​the high-voltage contact plates 43, 63 for illustrative purposes and better understanding. In reality, the high-voltage connections 44, 64 can be located in any suitable area of ​​the high-voltage contact plates 43, 63.

[0056] The adjustment plate arrangement 50 comprises a movable adjustment plate 51 and a high-voltage current collector plate 53, wherein the adjustment plate arrangement 50 is arranged between the first end plate arrangement 40 and the second end plate arrangement 60.

[0057] As can be clearly seen in Fig. 2, the electrochemical cell stacking unit 10 further comprises at least one electrical current conductor 70 for transmitting electrical energy, in particular for transporting a high-voltage current, between the high-voltage current collector plate 53 of the adjustment plate arrangement 50 and the second high-voltage connection 64 of the second high-voltage contact plate 63 of the second end plate arrangement 60, wherein the at least one electrical current conductor 70 is arranged above the high-voltage current collector plate 53 and below the second high-voltage connection 64, wherein the at least one electrical current conductor 70 is variable in length during the execution of the stroke compensation of the electrochemical cell stack 20.

[0058] The first lower end region 21 of the electrochemical cell stack 20 is electrically connected to the first high-voltage contact plate 43 and the second upper end region 22 of the electrochemical cell stack 20 is electrically connected to the high-voltage current collector plate 53.

[0059] During operation of the electrochemical cell stacking unit 10, a high-voltage electrical current of high intensity is generated by the numerous individual electrochemical cells of the electrochemical cell stack 20. This current can be tapped from the first high-voltage terminal 44 and the second high-voltage terminal 64 for connection to external power-consuming devices. The insulating plates 42, 62 serve in particular to completely prevent any electrical loss from the high-voltage contact plates 43, 63 to the outside.

[0060] In the prior art, the second high-voltage connection 64, i.e., the positive high-voltage connection, is attached directly to the second upper end region 22 of the electrochemical cell stack 20. Since the electrochemical cell stack 20 undergoes changes in length due to operational factors, the distance between the two high-voltage connections 44, 64 also varies according to the cell stack height. This necessitates a very complex, space-consuming, and costly busbar assembly to conduct the current from the electrochemical cell stack 20. The electrical current conduction system 70 according to the invention is intended to eliminate this problem.

[0061] The core idea of ​​the invention is not to tap the output voltage directly at the second upper end region 22 of the electrochemical cell stack 20 as in the prior art, but to conduct the current at the second upper end region 22 of the electrochemical cell stack 20 further via the adjusting plate arrangement 50 and via the at least one electrical current conductor 70 into the second end plate arrangement 60, so that the output voltage can be tapped in particular at the second high-voltage connection 64 of the second high-voltage contact plate 61 of the second end plate arrangement 60.

[0062] By conducting the current via the adjusting plate arrangement 50 and the at least one electrical current conductor 70, the positive high-voltage connection 64 for tapping the output voltage is in particular relocated further upwards, i.e., to the second high-voltage contact plate 61 of the second end plate arrangement 60 above the electrochemical cell stack 20. The relocation of the positive high-voltage connection 64 has the particular advantage over the prior art that a constant distance between the two high-voltage connections 44, 64, in particular a constant distance between the positive high-voltage connection 64 and the negative high-voltage connection 44, can be ensured.

[0063] According to the invention, at least one electrical current conductor 70 is provided. Preferably, several electrical current conductors 70 are provided.

[0064] In the illustrated Fig. 2, several electrical current guides 70 are provided, which are designed as electrically conductive high-voltage springs 71.

[0065] The electrically conductive high-voltage springs 71 differ from the elastic elements 80 designed as tension springs. However, it is possible that some or all of the elastic elements 80 are designed as electrically conductive high-voltage springs 71.

[0066] The electrically conductive high-voltage springs 71 are particularly suitable for static or dynamic electrical applications. The electrically conductive high-voltage springs 71 ensure a consistent and reliable high-voltage connection even under shock and vibration. The electrically conductive high-voltage springs 71 effectively handle high, medium, and low currents over extended periods with minimal heat generation in a compact space. To further conduct the current at the second upper end region 22 of the electrochemical cell stack 20 via the adjustment plate arrangement 50, a first embodiment preferably provides that the movable adjustment plate 51 is electrically conductive in a contact area 55 with the electrical current conductor 70 or comprises an electrically conductive material, wherein the contact area 55 is electrically insulated from the external environment.

[0067] It is possible that the contact area 55 has at least one high-voltage passage for carrying the at least one electrical current conductor 70. A direct high-voltage connection between the electrical current conductor 70 and the high-voltage current collector plate 53 of the adjustment plate assembly 50 can be established via the high-voltage passage.

[0068] Fig. 3 shows a front view of an electrochemical cell stacking unit 10 according to the first embodiment of the present invention with several flexible high-voltage power cables 72.

[0069] In this embodiment, no more expensive and high-quality electrically conductive high-voltage springs 71 are required to conduct the current at the second upper end region 22 of the electrochemical cell stack 20 further via the adjustment plate arrangement 50. The flexible high-voltage current cables 72 can be easily guided within the already installed elastic elements 80, i.e., the tension springs, or laterally parallel to the tension springs.

[0070] The flexible high-voltage power cables 72 exhibit very good electrical conductivity. Furthermore, the flexible high-voltage power cables 72 have very good insulation in certain areas, enabling them to be routed within the already installed elastic elements 80.

[0071] Figure 4 shows a front view of an electrochemical cell stacking unit 10 according to the second embodiment of the present invention with an electrically conductive high-voltage spring 71. In this embodiment, the movable adjusting plate 51, as is customary in the prior art, is not electrically conductive and does not comprise any electrically conductive material. The elastic elements 80 also do not have an electrically conductive function and are designed as conventional tension springs.

[0072] However, in order to still be able to conduct the current at the second upper end region 22 of the electrochemical cell stack 20, the second embodiment provides that the at least one electrical current conductor 70, in particular the electrically conductive high-voltage spring 71, is directly connected to a current collector 54 of the high-voltage current collector plate 53 to establish a high-voltage connection.

[0073] To completely avoid electrical loss from the high-voltage current collector plate 53 to the outside, the adjustable plate arrangement 50 has a third insulator plate 52.

[0074] In the figures shown, the electrical current conductor 70 is routed in a lateral region of the electrochemical cell stack 20 for illustrative purposes and better understanding. In reality, the electrical current conductor 70 can be routed in any suitable region.

[0075] It is also possible that the electrical current conductor 70 according to the invention is designed in a further embodiment as a multi-layered flexible high-voltage rail 73.

[0076] Such a multi-layer flexible high-voltage busbar 73 can, for example, consist of several individual copper busbars which are deformable, in particular bendable. This makes the multi-layer flexible high-voltage busbar 73 very suitable for high dynamic loads and high temperatures. At the same time, the multi-layer flexible high-voltage busbar 73 is very suitable for compensating for system movements, in particular for compensating for the movement of the electrochemical cell stack 20 during operation.

[0077] The multi-layered flexible high-voltage rail 73 is also very lightweight and exhibits excellent electrical conductivity. Furthermore, the flexible high-voltage rail 73 offers very good insulation against the external environment in certain areas.

[0078] It is also possible that the electrical current guide 70 according to the invention is designed in a further embodiment as a deflectable high-voltage rail linkage 74.

[0079] Such a deflectable high-voltage rail linkage 74 can, for example, consist of electrically conductive and insulated rods, hinges, and ball joints. The rods can be made of, for example, copper, aluminum, or another electrically conductive material.

[0080] The rods are very robust and are very well suited for precise translational movements under high dynamic loads and high temperatures.

[0081] The deflectable high-voltage rail linkage 74 is therefore also very suitable for compensating for the stroke of the electrochemical cell stack 20 during operation.

[0082] In a further embodiment, the electrical current conductor 70 according to the invention can be designed as a flexible grounding strap 75. Such a flexible grounding strap 75 can, for example, have a flat cross-sectional profile and consist of a braid of a plurality of thin copper wires or a bundle of thin copper sheets. The flexible grounding strap 75 exhibits very good electrical conductivity and, in certain areas, very good insulation.

[0083] In the figures 1 to 4 shown, the end plates 41, 61, the insulator plates 42, 62 and the high-voltage contact plates 43, 63 are designed as separate components.

[0084] In a further embodiment, the insulator plates 42, 62 and the high-voltage contact plates 43, 63 are integrated into the end plates 41, 61, so that the end plate assemblies 40, 60 each consist of only one plate. Such a single plate can, for example, be a plate made of several different materials, exhibiting electrical conductivity and electrical insulation in certain areas.

[0085] In another embodiment, the insulator plate 52 and the high-voltage current collection plate 53 are integrated into the movable adjustment plate 51, so that the adjustment plate arrangement 50 consists of only one plate.

[0086] Fig. 5 shows a view of a first end plate arrangement 40 according to a further embodiment of the present invention. In the illustrated first end plate arrangement 40, the first end plate 41, the first insulator plate 42 and the first high-voltage contact plate 43 are integrated, so that the illustrated first end plate arrangement 40 consists of only one plate.

[0087] The first end plate arrangement 40 shown has a plurality of openings 45 for the connection points of the connecting lines (media supply, -discharge).

[0088] As can be clearly seen in Fig. 5, the first high-voltage connection 44, i.e., the negative high-voltage connection, is provided in a lateral edge region. However, the first high-voltage connection 44 can be located in any suitable area of ​​the illustrated first end plate arrangement 40.

[0089] Fig. 6 shows a view of a second end plate arrangement 60 according to a further embodiment of the present invention.

[0090] In the illustrated second end plate arrangement 60, the second end plate 61, the second insulator plate 62 and the second high-voltage contact plate 63 are integrated, so that the illustrated second end plate arrangement 60 consists of only one plate.

[0091] In contrast to the first end plate arrangement 40 shown in Fig. 5, the second end plate arrangement 60 shown in Fig. 6 has no openings for the connection points of the connecting lines (media supply, discharge). As can be clearly seen in Fig. 6, the second high-voltage connection 64, i.e., the positive high-voltage connection, is provided in a corresponding lateral edge area. However, the second high-voltage connection 64 can be located in any suitable area of ​​the illustrated second end plate arrangement 60.

[0092] The first high-voltage terminal 44 and the second high-voltage terminal 64 can be arranged identically to each other. Alternatively, the first high-voltage terminal 44 and the second high-voltage terminal 64 can be arranged independently in different positions.

Claims

Claims 1. Electrochemical cell stacking unit (10) comprising: - a first end plate arrangement (40) comprising a first end plate (41), a first insulator plate (42) and a first high-voltage contact plate (43), wherein the first high-voltage contact plate (43) has a first high-voltage terminal (44), - a second end plate arrangement (60) comprising a second end plate (61), a second insulator plate (62) and a second high-voltage contact plate (63), wherein the second high-voltage contact plate (63) has a second high-voltage terminal (64), - an adjustment plate arrangement (50) comprising a movable adjustment plate (51) and a high-voltage current collector plate (53), wherein the adjustment plate arrangement (50) is arranged between the first end plate arrangement (40) and the second end plate arrangement (60), - an electrochemical cell stack (20) with a first lower end region (21) and a second upper end region (22), wherein the electrochemical cell stack (20) is extendable, in particular length-variable, along a longitudinal axis (L) of the electrochemical cell stack (20), wherein the first lower end region (21) is electrically connected to the first high-voltage contact plate (43) and the second upper end region (22) is electrically connected to the high-voltage current collector plate (53), - a plurality of elastic elements (80) for exerting pressure on the electrochemical cell stack (20) and for performing a stroke compensation as a result of a change in length of the electrochemical cell stack (20), wherein the elastic elements (80) are arranged between the adjusting plate arrangement (50) and the second end plate arrangement (60), - a plurality of clamping elements (90), wherein the first end plate arrangement (40) and the second end plate arrangement (40) are formed by the plurality of clamping elements (90) The end plate arrangement (60), the adjustment plate arrangement (50), the electrochemical cell stack (20) and the plurality of elastic elements (80) are fixed, wherein the plurality of clamping elements (90) are in a tensioned state and the plurality of elastic elements (80) are in a compressed state. - at least one electrical current conductor (70) for transmitting electrical energy, in particular for transporting a high-voltage current, between the high-voltage current collector plate (53) of the adjustment plate arrangement (50) and the second high-voltage connection (64) of the second high-voltage contact plate (63) of the second end plate arrangement (60), wherein the at least one electrical current conductor (70) is arranged between the high-voltage current collector plate (53) and the second high-voltage connection (64), - wherein at least one electrical current conductor (70) is length-variable during the execution of the stroke compensation of the electrochemical cell stack (20) 2. Electrochemical cell stacking unit (10) according to claim 1, characterized in that the movable adjusting plate (51) is electrically conductive in a contact area (55) with the at least one electrical current guide (70) or comprises an electrically conductive material, wherein the contact area (55) is electrically insulated from the external environment.

3. Electrochemical cell stacking unit (10) according to claim 1, characterized in that the at least one electrical current conductor (70) is directly connected to a current collector (54) of the high-voltage current collector plate (53) to establish a high-voltage connection.

4. Electrochemical cell stacking unit (10) according to one of the preceding claims, characterized in that the at least one electrical current guide (70) is designed as an electrically conductive high-voltage spring (71).

5. Electrochemical cell stacking unit (10) according to one of the preceding claims 1 to 3, characterized in that the at least one electrical current conductor (70) is designed as a flexible high-voltage power cable (72).

6. Electrochemical cell stacking unit (10) according to one of the preceding Claims 1 to 3, characterized in that the electrical current conductor (70) is designed as a multi-layer flexible high-voltage rail (73).

7. Electrochemical cell stacking unit (10) according to one of the preceding Claims 1 to 3, characterized in that the electrical current guide (70) is designed as a deflectable high-voltage rail linkage (74).

8. Electrochemical cell stacking unit (10) according to one of the preceding Claims 1 to 3, characterized in that the electrical current conductor (70) is designed as a flexible ground strap (75).

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