Module for an electroanalysis system with improved current conduction

Abstract

The invention relates to a module for an electrolysis system, comprising a plurality of electrolysis stacks, in particular proton-exchange membrane electrolysis stacks, wherein the module comprises two connections for connecting to an energy supply, the module comprising a plurality of outer faces and the two connections for connecting to the energy supply being provided in the direction of a first outer face of the module, and the module comprises a power line system which electrically connects the electrolysis stacks to the connections for connecting to the energy supply.

Description

[0001] 2024PF00292

[0002] 1

[0003] Description

[0004] Module for electrical analysis system with improved current flow

[0005] The present invention relates to the field of electrolysis devices, in particular devices for water electrolysis. Furthermore, the invention relates to the power supply of electrolysis cells in water electrolysis devices.

[0006] Due to the increasing share of renewable energies in electricity generation, water electrolysis for the production of hydrogen and oxygen is becoming increasingly important.

[0007] Industrial water electrolysis plants typically operate multiple electrolysis stacks for water electrolysis, each comprising a multiple electrolysis cells.

[0008] These stacks must be connected to a power supply, a water supply, and a product discharge or collection line for the reaction products hydrogen and oxygen. If several electrolysis stacks are combined into a module, the module must be powered at high electrical loads.

[0009] The electrolysis cells of an electrolysis stack are supplied with direct current and are typically connected in series.

[0010] Furthermore, in large-scale technical plants, it is desirable that the connections of a module for connection to the electrical power supply are arranged next to each other or in close proximity to each other.

[0011] A connection between electrolysis stacks via busbars through the module is known from the prior art. In this process, a leading electrolysis stack is connected to the power supply, followed by electrolysis stacks 2024PF00292.

[0012] The two electrolysis stacks are then connected in series. To create a closed circuit where both connections to the electrical power supply are adjacent, the prior art additionally includes a continuous conductor from a final electrolysis stack to a power supply connection near a first electrolysis stack of the module. This increases the total conductor length in a module relative to the number of electrolysis stacks, thus increasing material consumption and / or ohmic power loss relative to the number of electrolysis stacks. These effects are generally undesirable.

[0013] One object of the invention is to provide an improved module for use in an electrolysis plant.

[0014] Another optional objective of the invention is to provide a module with improved current conduction for use in an electrolysis plant.

[0015] A solution to this problem is provided in the independent claims. Further advantageous embodiments of the invention are described in the dependent claims, the following description, and the figures.

[0016] In a first aspect, a module for an electrolysis plant of fenbart is described. The module comprises a plurality of electrolysis stacks, in particular proton exchange membrane electrolysis stacks.

[0017] The module also includes two terminals for connecting to a power supply. The module also includes multiple outer surfaces. The two terminals for connecting to the power supply are located on one of the outer surfaces of the module. 2024PF00292

[0018] 3

[0019] The module includes a power supply system that electrically connects the electrolysis stacks to the connections for the power supply.

[0020] The electrolysis stacks can be for water electrolysis. In particular, they can be proton exchange membrane electrolysis stacks.

[0021] Electrolysis stacks can comprise a large number of electrolysis cells for water electrolysis. The electrolysis cells of a stack can be electrically connected in series.

[0022] The module can be a pre-assembled module. For example, the electrolysis stacks, preferably the electrolysis stacks and the power supply system, can be pre-assembled.

[0023] The two connections for connecting to the power supply, which are located towards the first outer side of the module, can, for example, be located on the first outer side of the module.

[0024] The two connections for the power supply can also be positioned at a distance from this outer surface. This can optionally facilitate transport of the module in a pre-assembled state.

[0025] The first outer surface of the module can, for example, face a side of the module with a maintenance access point. This allows the connections to be advantageously positioned at an easily accessible height without obstructing the maintenance access.

[0026] The first outer side can be vertically oriented. In other words, the first outer side can be oriented perpendicular to a horizontal direction. 2024PF00292

[0027] 4

[0028] The two connections for connection to the power supply can be specifically designed for connection to a direct current power supply.

[0029] The electrolysis stacks can be connected in series via the power supply system. In other words, the power supply system can be configured to connect the module's electrolysis stacks in series to the power supply connections.

[0030] This configuration can optionally be advantageous, since in a series circuit the voltages of the connected loads add up and the current through all loads remains the same, thus reducing ohmic power losses compared to a parallel circuit.

[0031] In some configurations, each electrolysis stack can have a cathode connection and an anode connection. In these configurations, the power supply system can connect each electrolysis stack to either exactly two other electrolysis stacks, or to one electrolysis stack and one connection to the power supply.

[0032] The cathode terminal of each electrolysis stack can have a cathode connection of the respective stack. The anode terminal of each electrolysis stack can have an anode connection of the respective stack.

[0033] In the following, anode terminals and cathode terminals will also be referred to as electrode terminals.

[0034] In other words, in some embodiments, each electrolysis stack comprises a cathode connection side and an anode connection side, each comprising a cathode connection and an anode connection, respectively. In these embodiments, each of the electrode connections can then be used. 2024PF00292

[0035] 5. It must not be connected to an electrode connection of an adjacent electrolysis stack or to a connection to the power supply.

[0036] The electrolysis stacks can be arranged in at least two rows, in particular in two rows. Within the rows, the cathode terminal of a first stack can be oriented towards the anode terminal of a second, adjacent electrolysis stack in the row. The current conduction system can connect the cathode terminal of the first electrolysis stack to the anode terminal of the second, adjacent electrolysis stack in the row.

[0037] The other electrolysis stacks within the respective series can be connected in the same way.

[0038] In particular, the electrolysis stacks of each row can be aligned parallel to each other. That is, the electrolysis stacks of each row can be geometrically aligned parallel to each other. This optionally allows for the advantageous implementation of an electrical series connection of the electrolysis stacks with short conductor lengths between adjacent stacks, thereby reducing ohmic power loss and material usage.

[0039] The electrolysis stacks in a first row can have a first orientation. The electrolysis stacks in a second row can have a second orientation. The electrolysis stacks in the second orientation and the electrolysis stacks in the first orientation can enclose an angle of substantially 180°.

[0040] In other words, the electrolysis stacks of the first row can be arranged antiparallel to the electrolysis stacks of the second row.

[0041] In particular, the anode sides of the electrolysis stacks of the first row and the anode sides of the electrolysis stacks 2024PF00292 can

[0042] 6

[0043] The second-row stacks are located on opposite sides of the electrolysis stacks. The same relationship can be observed for the cathode sides of the electrolysis stacks.

[0044] Thus, it is optionally advantageous to allow current to flow through the module during operation, so that a first electrolysis stack and a last electrolysis stack in the circuit can each be located near a connection to the power supply. Accordingly, an additional conductor, which, as in the case of a single row, connects an electrolysis stack of the module located furthest away from the power supply connections to a connection to the power supply, can optionally be omitted.

[0045] The power transmission system can have an electrical connection between a first-row electrolysis stack and a second-row electrolysis stack on a side of the power transmission system facing away from the connections to the power supply.

[0046] This allows, optionally and advantageously, a closed circuit of electrolysis stacks connected in series to be provided in one module.

[0047] The connection between the electrolysis stack of the first row and the electrolysis stack of the second row can have a section on the side of the power supply system facing away from the connections to the power supply, which can include a free space of at least 1.5 m, preferably at least 1.75 m above a receiving plane of the module.

[0048] This allows, optionally and advantageously, a maintenance access point to be provided on the side of the module opposite the power supply connections, without having to dismantle the power supply system in every case. 2024PF00292

[0049] The recording plane is preferably located within the recording volume. It can, for example, define a bottom surface of the recording volume.

[0050] Sections of the recording plane can be defined by parts of the module frame. However, the recording plane can also be positioned above lower parts of the module frame.

[0051] The acquisition plane can also be referred to as the common acquisition plane. The acquisition plane can be a common acquisition plane for the electrolysis stacks of the module.

[0052] The power supply system can include busbars for connecting the electrolysis stacks. Any two adjacent electrolysis stacks can be connected by at least one busbar, in particular by a plurality of busbars connected in parallel.

[0053] The busbars can also be called power rails. The busbars can consist of a conductive metal, such as copper or aluminum.

[0054] Different sections of the power line system can be constructed from busbars made of different materials. For example, aluminum busbars may be used in some sections and copper busbars in others.

[0055] The power transmission system and the electrolysis stacks can extend in a vertical projection, essentially in a U-shape, within the module.

[0056] This allows for optional and advantageous further improvement of the current flow through the module. In particular, adjacent electrolysis stacks can optionally be connected directly to each other, and the total length of the conductors in the power supply system, relative to the number of electrolysis stacks, can be further reduced. 2024PF00292

[0057] 8

[0058] In addition, a particularly compact design of the power supply system can optionally be advantageously enabled.

[0059] The power transmission system can be designed to carry a current of at least 5 kA, preferably at least 7.5 kA, and more preferably at least 9.5 kA.

[0060] The power supply system can be designed to be connected to a voltage of at least 800 V, preferably at least 1 kV. The power supply system can be designed to be connected to a voltage of at most 1500 V.

[0061] Thus, the electrical power can optionally and advantageously be provided for the efficient operation of a module of an industrial-scale electrolysis plant.

[0062] At least one section of the power line system may be made of aluminum. The cross-sectional area of ​​the power line system in this section may be at least 0.015 m². 2 preferably at least 0.0175 m 2 , and preferably at least 0.02 m 2 , amount to .

[0063] This optionally allows for a sufficiently low ohmic power loss and a correspondingly temperature-stable connection in the continuous operation of the module's electrolysis stacks.

[0064] The busbars may have elastic sections to compensate for thermal expansion.

[0065] These elastic sections may have a lower stiffness than other sections of the busbars. They may, for example, be constructed from layered sheets or thin metal plates. 2024PF00292

[0066] 9

[0067] This further simplifies continuous operation of the module and reduces mechanical stress on the busbars.

[0068] The device can include a modular frame that defines a receiving volume. In particular, the electrolysis stacks and the power supply system can be arranged essentially within the receiving volume.

[0069] The receiving volume can, for example, be an essentially cuboid space. The module frame can, for example, comprise frame elements that are essentially arranged at the edges of the cuboid space.

[0070] This can optionally simplify the transport of the module in a pre-assembled state.

[0071] The connections to the power supply can be at most 3.5 m apart, preferably at most 3 m, and more preferably at most 2.5 m apart.

[0072] The electrolysis stacks of the module can have a total power output of at least 0.8 MW, preferably at least 1.0 MW, and more preferably at least 1.2 MW, for example about 1.25 MW.

[0073] Thus, a module can be provided for operation in an industrial-scale electrolysis plant. Optionally, and advantageously, the power transmission system according to the invention can particularly increase the efficiency of modules with this total power output by reducing electrical power loss or material requirements.

[0074] The invention is further explained with reference to the accompanying illustrations. These illustrations show

[0075] Figure 1 is an isometric view of a module for an electrolysis plant; 2024PF00292

[0076] 10

[0077] Figure 2 shows a side view of the module for an electrolysis plant;

[0078] Figure 3 shows a top view of the module for an electrolysis plant;

[0079] Figure 4 shows a rear view of the module for an electrolysis plant, with a crane of the module visible;

[0080] Figure 5 shows a rear view of the module for an electrolysis plant, with components of the crane not shown;

[0081] Figure 6 shows a front view of the module for an electrolysis plant.

[0082] The invention is further explained below with reference to the figures. In the figures, identical elements are provided with the same reference numerals and are not explained multiple times to avoid duplication.

[0083] Figure 1 shows a module 10 for an electrolysis plant. In the embodiment shown in Figure 1, the module 10 comprises a module frame 12, which defines a receiving volume.

[0084] The module further comprises a plurality of electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g, which are arranged in the receiving volume.

[0085] The electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g are connected to at least one water supply line 30a, 30b, 30c, 30d. In the example of Figure 1, each product side of an electrolysis stack is connected to a water supply line 30a, 30b, 30c, 30d.

[0086] The electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g are configured to produce hydrogen and oxygen from water using electrical energy. The example shown in Figure 1 uses proton exchange membrane electrolysis stacks (PEM electrolysis stacks). However, modules with other electrolysis stacks are also conceivable, e.g., electrolysis stacks for alkaline water electrolysis. 2024PF00292

[0087] 11

[0088] Industrial electrolysis plants typically operate a large number of electrolysis stacks for water electrolysis.

[0089] Transporting and setting up the electrolysis stacks involves technical effort.

[0090] In particular, assembling the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, and 40g with sufficient accuracy on an electrolysis plant construction site can be challenging. Furthermore, assembling components of Module 10 on-site is often more difficult than in an industrial manufacturing environment. For example, the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, and 40g can each have an empty mass of 2.0–2.3 t, e.g., 2.1 t. Precisely moving components of such mass generally requires the use of a crane, as sufficiently precise positioning is usually not possible with forklifts.

[0091] The modules are often transported via the public road network and / or by sea. Therefore, it is desirable to be able to transport the modules as easily as possible by truck, and to provide as many electrolysis stacks as possible per module.

[0092] In the example shown in Figure 1, module 10 comprises a total of 10 electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g. Each electrolysis stack has one side with an electrical cathode connection and one side with an electrical anode connection. These are further explained with reference to Figure 3.

[0093] The module 10 shown in Figure 1, for example, can have an empty mass between 35 t and 45 t.

[0094] In the example shown in Figure 1, module 10 also includes a crane 60. A guide rail 68b of the crane 60 is shown in Figure 1. This guide rail 68b can be, for example, according to 2024PF00292.

[0095] 12

[0096] The module frame with the mounted electrolysis stacks is transported to the installation site to limit the length of module 10 during transport. However, the guide rail 68b can also be pre-mounted before transport to minimize on-site assembly.

[0097] As can be seen from Figure 1, the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g are arranged within a receiving volume defined by the module frame 12.

[0098] As can be seen from Figure 1, the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g are arranged in two parallel rows 18a, 18b in the longitudinal direction of the module 10.

[0099] Figure 2 shows a side view of module 10.

[0100] Figure 2 shows the module frame 12 and a plurality of frame elements 14a, 14b, 14c, 14d that the module frame 12 comprises. The frame elements 14a, 14b, 14c, 14d can, for example, be designed as rod-shaped elements.

[0101] The frame elements 14a, 14b, 14c, 14d can, for example, be screwed and / or welded together.

[0102] The electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g in Figure 2 each have a connection 46a for connection to a Cp manifold of the electrolysis plant and a connection 48a for connection to an H2 manifold of the electrolysis plant.

[0103] The electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g of module 10 are connected in series. The electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g are electrically connected by busbars. A plurality of busbars 50a, 50b, 50c, 50d, 50e are visible in Figure 2. These busbars 50a, 50b, 50c, 50d, 50e electrically connect adjacent electrolysis stacks as well as the two foremost electrolysis stacks of each row (left in Figure 2). 2024PF00292

[0104] 13

[0105] Module 10 has terminals 54a and 54b on its rear side (right in Figure 2) for connection to the power supply. These are shown in more detail in Figure 4.

[0106] In the example shown in the figures, the rearmost electrolysis stack of each row 18a, 18b is connected to the power supply. This results in a U-shaped current path between terminals 54a, 54b for connection to the power supply, as seen from a top view.

[0107] In operation, a current of, for example, 1 OkA can be carried.

[0108] Figure 3 shows a top view of module 10. In Figure 3, among other things, the water supply pipelines 30a, 30b, 30c, 30d already described can be seen below the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g.

[0109] The electrolysis stacks each have at least one electrical cathode connection 42a, 42b and one electrical anode connection 44a, 44b .

[0110] For the stacks in the example shown in the figures, the at least one anode connection 44a, 44b j is arranged on a first side of the stack, and the at least one cathode connection 42a, 42b j is arranged on a second side of the stack opposite the first.

[0111] In the example shown in the figures, the electrolysis stacks of a row are oriented such that the sides of the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g, which have the anode terminals 44a, 44b and the cathode terminals 42a, 42b, are each oriented perpendicular to the longitudinal direction of the module 10. Furthermore, the electrolysis stacks 40a, 40b, 40c, 40d, 40e in a first row are oriented essentially antiparallel to the electrolysis stacks in a second row. 2024PF00292

[0112] 14

[0113] Thus, a U-shaped current flow is obtained in a view from a vertical direction. Furthermore, the connections 54a and 54b to the power supply are accessible from the same longitudinal side of the device, simplifying the connection to the power supply. In addition, in the example of Figure 3, no additional conductor is required to connect the foremost electrolysis stack 40f to a power supply connection.

[0114] The module can be configured, for example, for use with a voltage between 1.0 and 1.5 kV.

[0115] The busbars, for example, have an elastic region 52a, 52b between each pair of stacks with a lower stiffness compared to the rest of the busbar. This allows thermally induced strains during operation of the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g to be advantageously compensated.

[0116] Figure 3 also shows the guide rails 68a, 68b of the crane and a cross rail 70 of the crane guided by the guide rails.

[0117] The guide rails 68a, 68b are designed as C-rails in the example shown in Figure 3. The cross rail 70 of the crane is designed as a double-T beam in the example shown in Figure 3.

[0118] Figure 4 shows a rear view of module 10. Figure 4 shows, among other things, the guide rails 68a, 68b of the crane, the cross rail 70 of the crane, a trolley 62, a chain drive 66 and a load handling device 64.

[0119] The trolley is mounted on the cross rail 70 of the crane so that it can slide in one lateral direction of the module. A lifting gear, in the case of Figure 4 a chain drive 66, is attached to the trolley. The lifting gear allows the load-handling device 64 to be moved in a vertical direction. 2024PF00292

[0120] 15

[0121] In the example shown in Figure 4, the chain drive 66 is designed to be driven manually. Furthermore, the chain drive 66 is designed so that an electrolysis stack 40a, 40b, 40c, 40d, 40e, 40f, 40g can be lifted by muscle power using the crane 60.

[0122] This allows electrical machines to be avoided near the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g and reduces the risk of explosion.

[0123] The load-handling device 64 is designed as a crane hook in the example shown in Figure 4. However, the load-handling device 64 can also be designed as an eyelet, for example.

[0124] Furthermore, Figure 4 shows the connections 54a and 54b for connecting to the power supply of the rearmost electrolysis stacks of each row. In the example of Figure 4, these are each configured as electrode connections for the two rearmost electrolysis stacks.

[0125] Furthermore, connections 46b and 48b for connection to the O2 and H2 manifolds are shown. As can be seen, module 10 is designed to be connected to two product manifolds arranged laterally next to module 10.

[0126] In the plant, the product collection lines transport the respective products further in the electrolysis plant, e.g. to respective collection facilities or for further processing.

[0127] Figure 4 also shows the busbars 50b, 50h, 50g, 50i for connecting the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g.

[0128] In the example shown in the figures, the busbars 50b, 50a on the front of module 10 form a free space, 2024PF00292

[0129] 16 through which a maintenance access is provided between the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g.

[0130] Figure 5 shows another rear view of module 10. In Figure 5, some components of the crane 60 are not shown, so that the guide rails 68a, 68b of the crane are more clearly visible.

[0131] Figure 5 also shows the rows 18a, 18b of the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g, which extend longitudinally along the module. The electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g are arranged on a common receiving plane 16. In the example shown in Figure 5, the common receiving plane 16 is defined, among other things, by the frame element 14e.

[0132] Figure 5 also shows electrically insulating connecting lines 32a, 32b between water inlets of the electrolysis stacks 40a, 40b, 40c, 40d, 40e, 40f, 40g and the water supply lines 30a, 30b, 30c, 30d.

[0133] In the example of Figure 5, the connecting lines 32a, 32b are connecting pipe sections.

[0134] Figure 6 shows a front view of module 10.

[0135] Figure 6 shows the foremost electrolysis stacks 40e, 40f of the two rows 18b, 18a.

[0136] Likewise, the passage formed by busbars 50a and 50b can be seen.

[0137] A person skilled in the art will readily recognize that these embodiments are merely examples of different ways of implementing the invention. Accordingly, the embodiments shown are not intended to limit the possible combinations of features of the disclosed invention (2024PF00292).

[0138] 17. The disclosure encompasses all possible combinations and configurations of the described features according to the invention.

Claims

2024PF00292 18 Patent claims 1. Module (10) for electrolysis system, comprising a plurality of electrolysis stacks (40a, 40b, 40c, 40d, 40e, 40f, 40g), in particular proton exchange membrane electrolysis stacks, wherein the module comprises two terminals for connection to a power supply (54a, 54b), wherein the module (10) comprises a plurality of outer surfaces, wherein the two terminals for connection to the power supply (54a, 54b) are arranged towards a first outer surface of the module, wherein the module (10) comprises a power supply system which electrically connects the electrolysis stacks (40a, 40b, 40c, 40d, 40e, 40f, 40g) to the terminals for connection to the power supply (54a, 54b).

2. Module (10) according to the preceding claim, wherein the electrolysis stacks (40a, 40b, 40c, 40d, 40e, 40f, 40g) are connected in series by the power line system.

3. Module (10) according to any of the preceding claims, wherein each electrolysis stack (40a, 40b, 40c, 40d, 40e, 40f, 40g) has a cathode connection side and an anode connection side, wherein the power supply system connects each electrolysis stack (40a, 40b, 40c, 40d, 40e, 40f, 40g) only to a. exactly two electrolysis stacks, or b. an electrolysis stack and a connection to the power supply (54a, 54b).

4. Module (10) according to one of the preceding claims, wherein the electrolysis stacks (40a, 40b, 40c, 40d, 40e, 40f, 40g) are arranged in at least two rows (18a, 18b), wherein within the rows (18a, 18b) the cathode terminal side of a first stack is oriented towards the anode terminal side of a second stack adjacent in the row, and the current conduction system 2024PF00292 19 connects the cathode terminal (42a, 42b) of the first stack with an anode terminal (44a, 44b) of the second stack adjacent in the series, wherein the electrolysis stacks of each series are in particular aligned parallel to each other.

5. Module (10) according to the preceding claim, wherein the electrolysis stacks (40f, 40g) in a first row (18a) have a first orientation, and the electrolysis stacks (40a, 40b, 40c, 40d, 40e) in a second row (18b) have a second orientation, wherein the electrolysis stacks in the second orientation and the electrolysis stacks in the first orientation enclose an angle of substantially 180°.

6. Module (10) according to the preceding claim, wherein the power supply system has an electrical connection between an electrolysis stack (40e) of the first row (18a) and an electrolysis stack (40f) of the second row (18b) on a side of the power supply system facing away from the connections to the power supply (54a, 54b).

7. Module (10) according to the preceding claim, wherein the connection between the electrolysis stack (40e) of the first row (18a) and the electrolysis stack (40f) of the second row (18b) has a section on the side of the power supply system facing away from the connections to the power supply (54a, 54b) which has a clearance of at least 1.5 m, preferably at least 1.75 m above a receiving plane (16) of the module (10) includes.

8. Module (10) according to one of the preceding claims, wherein the power transmission system comprises busbars (50a, 50b, 50c, 50d, 50e, 50f, 50g, 50h, 50i) for connecting the electrolysis stacks, wherein each pair of adjacent electrolysis stacks (40a, 2024PF00292 20 40b, 40c, 40d, 40e, 40f, 40g) are connected by at least one, in particular a plurality of, parallel connected busbars.

9. Module according to one of the preceding claims, wherein the power transmission system and the electrolysis stacks (40a, 40b, 40c, 40d, 40e, 40f, 40g) extend in a vertical projection substantially in a U-shape in the module (10).

10. Module (10) according to one of the preceding claims, wherein the power transmission system is designed to carry a current of at least 5 kA, preferably at least 7.5 kA, and further preferably at least 9.5 kA, and to be connected to a voltage of at least 800 V, preferably at least 1 kV.

11. Module (10) according to one of the preceding claims, wherein at least one area of ​​the power transmission system is made of aluminium, wherein a conductor cross-section of the power transmission system in this area is at least 0.015 m 2 , preferably at least 0.0175 m 2 and preferably at least 0.02 m 2 amounts .

12. Module (10) according to one of the preceding claims having the features of claim 8, wherein the busbars (50a, 50b, 50c, 50d, 50e, 50f, 50g, 50h, 50i) have elastic sections to compensate for thermal expansion.

13. Module (10) according to one of the preceding claims, wherein the module comprises a module frame (12) defining a receiving volume, wherein the electrolysis stacks ( (40a, 40b, 40c, 40d, 40e, 40f, 40g) and the power supply system are substantially arranged within the receiving volume. 2024PF00292 21 14. Module (10) according to one of the preceding claims, wherein the connections to the power supply (54a, 54b) have a distance of at most 3.5 m, preferably at most 3 m, and more preferably at most 2.5 m.

15. Module (10) according to one of the preceding claims, wherein the electrolysis stacks of the module (40a, 40b, 40c, 40d, 40e, 40f, 40g) have a total power of at least 0.8 MW, preferably at least 0.9 MW, and more preferably at least 1.0 MW.

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