Rectifier module and electrolysis system

Abstract

The invention relates to a rectifier module (4) for an electrolyzer (2), comprising a module housing (9), which comprises a rectifier system (10), which in particular has a linear arrangement along a longitudinal direction (x). The rectifier system (10) comprises at least one rectifier (11), which is designed to provide a direct current for the electrolyzer (2) from an alternating current, and in particular a cooling system (22) for the rectifier (11). Furthermore, the rectifier module (4) comprises an alternating current interface (12) for an electrical connection of the rectifier system (10) to a transformer and / or a direct current interface (13) for the electrical connection of the rectifier system (10) to the electrolyzer (2). According to the invention, the rectifier system (10) is arranged in the module housing (9) and also has a cooling system interface and a control system interface for simple installation in an electrolysis system (1).

Description

[0001] 2024 PF00840

[0002] 1

[0003] Description

[0004] rectifier module and an electrolysis system

[0005] Technical field

[0006] The present invention relates to a rectifier module and an electrolysis system comprising the rectifier module.

[0007] State of the art

[0008] The decarbonization of the energy sector and industrial processes poses enormous challenges to infrastructure. This infrastructure is being gradually restructured to enable the use of renewable energies, such as wind power and photovoltaics, as the primary resource. Hydrogen produced from renewable energy sources will play a crucial role in this process, as it is used in the energy sector as an energy storage medium for electrical and thermal energy, and in industrial processes as a feedstock for synthesis processes such as ammonia and hydrocarbon synthesis.

[0009] Electrolysis, used to split water into hydrogen and oxygen, forms the basis for these applications. It will be installed worldwide in the coming decades in the two- to three-terawatt (TW) power range. Such large electrolysis capacities were unprecedented in the past.

[0010] To enable the required growth of three to four orders of magnitude in terms of currently installed electrolysis capacity, mass-producible production and installation methods must be employed that efficiently install high-performance electrolysis systems in the power range of more than 50 megawatts (MW), ideally more than 100 MW, but also up to over 1000 MW. As a first step in the development of the modular electrolysis system, gas separators, heat exchangers, and measurement and control technology were pre-assembled into module groups for quick and efficient on-site assembly. 2024 PF00840

[0011] However, modularizing the rectification process, in which a mains-side alternating current is converted into a direct current for electrolysis, proves difficult due to the complexity of this component.

[0012] Description of the invention

[0013] It is therefore an object of the present invention to provide an easy-to-install rectifier module and an improved, modularized electrolysis system.

[0014] A solution is provided by the subject matter according to the independent claims. Advantageous further embodiments of the invention are described in the dependent claims, in the following description, and in the figures.

[0015] The invention relates to a rectifier module for an electrolyzer comprising a module housing which includes a rectifier system, which in particular has a linear arrangement along a longitudinal direction, wherein the rectifier system comprises at least one rectifier which is configured to provide a direct current for the electrolyzer from an alternating current, and in particular a cooling system for the rectifier, wherein the module housing comprises an AC interface for an electrical connection of the rectifier system to a transformer and / or a DC interface for the electrical connection of the rectifier system to the electrolyzer.

[0016] According to the invention, the rectifier system is arranged in the module housing.

[0017] In other words, the rectifier system can be designed for pre-assembly in the module housing and, in particular, can have a cooling system interface for supplying a cooling medium and / or a control system interface. The components of the rectifier system can be found in 2024 PF00840.

[0018] 3

[0019] The components of the rectifier system are arranged linearly in the longitudinal direction within an interior space of the module housing. "Linear" in this context can refer to components of the rectifier system arranged in a row along the longitudinal direction. The components of the rectifier system can include the rectifier and / or the cooling system and / or the control interface, in particular a user interface.

[0020] The rectifier system can comprise at least one rectifier and a cooling system, which can be arranged in series longitudinally within the module housing. The module housing can include the DC interface for an electrical connection between the rectifier and the electrolyzer, and the AC interface for an electrical connection between the rectifier and a transformer.

[0021] This offers the advantage that the rectifier system can be prefabricated and easily transported to the construction site of an electrolysis system. Furthermore, the installation of the rectifier module into an electrolysis plant is significantly simplified, as only the interfaces of the pre-assembled rectifier module—in particular the DC and AC interfaces, and optionally the cooling system interface—need to be connected. This allows for a more efficient construction of the electrolysis plant.

[0022] The rectifier module also includes embodiments that offer further advantages.

[0023] One embodiment provides that the AC interface and the DC interface are arranged on different, in particular opposite, sides of the module housing. In other words, the DC interface can be arranged on an electrolyzer side of the module housing and / or the AC interface can be located on 2024 PF00840

[0024] 4

[0025] The electrolyzer side of the module housing may be arranged on the transformer side. When the module housing is arranged in an electrolysis plant comprising the electrolyzer and the transformer, the electrolyzer side may be located opposite the electrolyzer, and / or the transformer side of the module housing may be located opposite the transformer. The electrolyzer side and the transformer side of the module housing may be different sides of the module housing, in particular adjacent sides or orthogonal to each other.

[0026] Additionally, the electrolyzer side and the transformer side can be opposite sides of the module housing.

[0027] This offers the advantage of simplifying the installation of the module housing in an electrolysis system. Furthermore, the DC and AC interfaces can be positioned as far apart as possible, thus reducing electromagnetic interference.

[0028] One embodiment provides that the module housing has a double-walled side, in particular a double bottom, within which a DC busbar, which electrically connects the DC interface to a DC side of the rectifier, and / or an AC busbar, which electrically connects the AC interface to an AC side of the rectifier, is arranged. In other words, at least one side of the module housing can be double-walled, with the DC busbar and / or the AC busbar each being arranged between an outer wall and an inner wall of the double-walled side. For example, the bottom side of the module housing can be double-walled, and / or the electrolyzer side and / or the transformer side. This has the advantage of reducing electromagnetic interference and thus making the rectifier module safer.2024 PF00840.

[0029] 5

[0030] One embodiment provides that the double bottom in an interior of the module housing forms a service level for the rectifier system on a bottom side facing away from the DC busbar and / or the AC busbar. In particular, the DC interface is arranged on a side of the module housing such that it is located vertically between the service level and the ground. In other words, a double-walled side can be configured as a bottom side of the module housing, with the inner wall of the bottom side being configured to serve as a service level for the rectifier system. The DC interface can be located, in particular, on the electrolyzer side of the module housing, vertically between the ground and the inner wall of the double-walled bottom side, specifically between the ground and the service level.

[0031] Additionally, the AC interface can be arranged, in particular on the transformer side of the module housing, in the vertical direction above the inner wall of the double-walled bottom side of the module housing, especially between the inner wall and a top side of the module housing which is opposite the bottom side.

[0032] This offers the advantage of improved electromagnetic compatibility. Furthermore, locating the DC interface near the ground reduces the installation effort for the electrolysis system when installing the DC busbar for the electrolyzer.

[0033] One embodiment provides that the AC busbar is made of copper and / or aluminum, and / or the DC busbar is made of aluminum and / or copper. In other words, the AC busbar can be made of copper and / or the DC busbar can be made of aluminum. This offers the advantage of an optimum in manufacturing and maintenance costs.

[0034] 6

[0035] electrical losses during operation can be achieved.

[0036] One embodiment provides that the module housing includes a cooling system interface for the cooling system, wherein, in particular, the cooling system interface is configured for supplying and discharging a cooling medium for the cooling system. In other words, the module housing can include the cooling system interface on a cooling system side of the module housing. The cooling medium for the cooling system can be a gas or a liquid. In particular, the cooling system can be gas- or liquid-based, and especially a ventilation system.

[0037] Additionally, the cooling system can be designed as a multi-stage cooling system, in particular as a two-stage cooling system. For example, the cooling system interface can be designed for the introduction and discharge of a gas and / or liquid as a cooling medium into a cooling circuit of the rectifier system.

[0038] Additionally, the cooling system interface can be located vertically below the DC interface and / or the AC interface.

[0039] Additionally, the cooling system interface can be arranged on one side, in particular a cooling system side, of the module housing, wherein the cooling system side is adjacent to the electrolyzer side and the transformer side. The cooling system side can be different from the electrolyzer side and / or the transformer side and / or the bottom side and / or the top of the module housing, in particular being orthogonal to the respective sides.

[0040] Additionally, the cooling system side can be located opposite a control system side of the module housing. 2024 PF00840

[0041] 7

[0042] For example, the cooling system side can be opposite a control system side of the module housing and, in particular, can be orthogonal to the electrolyzer side and / or the transformer side and / or to the top and / or bottom side of the module housing.

[0043] Additionally, the cooling system side of the module housing can be designed to exclusively include the cooling system clamp as an interface to external supply components.

[0044] This offers the advantage that if there is a leak in the cooling system interface, especially during assembly, the cooling medium cannot come into contact with electrical components.

[0045] One embodiment provides that the module housing includes a ventilation system designed for positive pressure and / or negative pressure ventilation of the module housing, wherein the ventilation system is specifically designed for humidity control and / or for enhancing natural air circulation within the module housing, particularly an upward-sloping air supply in the interior of the module housing. In other words, the cooling system, and especially the ventilation system, can be designed for positive pressure and / or negative pressure ventilation of the module housing. This offers the advantage that the rectifier module can be used indoors and outdoors, and in particular, can be used prefabricated. This results in more versatile applications for the mass-produced, pre-assembled rectifier module.

[0046] Additionally, the ventilation system can be designed to provide negative pressure ventilation in the event of a fire. This has the advantage of reducing the amount of smoke escaping in case of fire. 2024 PF00840

[0047] 8

[0048] Additionally, the ventilation system can be designed to dehumidify the air. This has the advantage of preventing condensation from forming inside the module housing.

[0049] Additionally, the ventilation system can be designed to provide, and in particular amplify, an upward air supply from a bottom side to a top side of the module housing. This offers the advantage of more efficient ventilation.

[0050] One embodiment provides that the module housing is weatherproof and / or thermally insulated. In other words, the module housing can be gas-tight and / or liquid-tight. This offers the advantage that the module housing can be used both indoors and outdoors. In particular, a gas-tight design of the module housing allows it to be installed in dry and dusty environments. The module housing can have a ventilation interface, which can be designed to prevent dust from entering the interior of the module housing.

[0051] Additionally, the module housing can include thermal insulation, in particular heat insulation. This has the advantage that the module housing can be kept within a more suitable operating temperature range for the rectifier.

[0052] One embodiment provides that comprising a control interface, wherein in particular the control interface includes a user interface arranged on an outside of the module housing. In other words, the control interface can be arranged on a control side of the module housing, which is in particular adjacent to or orthogonal to the electrolyzer side and / or the transformer side of the module housing. Additionally, the 2024 PF00840

[0053] 9

[0054] The control system side of the module housing may correspond to or differ from the cooling system side, in particular being located opposite the cooling system side. The outer surface may correspond to an outer surface of the control system side of the module housing. The control system interface may be configured as a data interface, in particular as a data bus system interface, such as according to a PROFINET® standard. The user interface may be configured to measure and / or adjust an operating parameter of the rectifier system via the control system interface and optionally via user input. The operating parameter may, for example, include a current, a voltage, and / or a cooling capacity of the rectifier system. The user interface may, for example, include a control and / or measuring unit for the rectifier system, in particular for the rectifier and / or the cooling system.The control system interface can also include a power supply for the control system, particularly for the user interface. This offers the advantage that the user interface can be easily connected to the rectifier module.

[0055] Additionally, the user interface can be designed to provide electromagnetic shielding. This offers the advantage that the user interface remains accessible to a user during operation of the rectifier system.

[0056] One embodiment provides that the rectifier module, in particular the module housing, is designed for road and / or rail transport. In other words, the rectifier module, in particular the rectifier system, can have a total weight that is below a weight limit for road and / or rail transport. Suitability for road and / or rail transport can, for example, correspond to a total rectifier module weight of 27 tons or less. Additionally, the module housing can have dimensions which 2024 PF00840

[0057] 10

[0058] may be smaller than the maximum permissible limits for road and / or rail transport.

[0059] Additionally, the module housing may have at least one load-bearing point designed to support the module housing. For example, the load-bearing point may be designed to support the module housing on a crane and / or to accommodate a forklift for lifting the module housing.

[0060] This offers the advantage that the rectifier module can be easily transported to the construction site of the electrolysis plant.

[0061] One embodiment provides that the module housing includes a lifting device for a component of the rectifier system, in particular the rectifier and / or the cooling system. In other words, the module housing can include a lifting device which may be configured to lift a weight that can correspond at most to the weight of the rectifier or the cooling device.

[0062] Additionally, the lifting device can be designed to move longitudinally and / or transversely within the module housing. For example, the lifting device can be an overhead crane or a cable hoist. This offers the advantage that components of the rectifier system can be easily replaced for maintenance.

[0063] One embodiment provides that the module housing includes a potential grounding interface for grounding an electrostatic and / or induced electrical voltage. In other words, the potential grounding interface can be configured as a ground for at least one electrical component of the rectifier system. Additionally, the potential grounding interface can provide electromagnetic shielding for the AC busbar.

[0064] 11

[0065] and the DC busbar, in particular a double-walled side of the module housing. For example, an inner wall of a double-walled side of the module housing, in particular the double-walled bottom, can be designed to be electromagnetically shielded.

[0066] Additionally, the potential separation interface can include an electrical fuse, in particular for the AC busbar and / or the DC busbar.

[0067] This offers the advantage of improving the electromagnetic compatibility of the rectifier module.

[0068] One embodiment provides that the module housing includes an extinguishing agent interface for supplying an extinguishing medium to a fire protection system, wherein, in particular, the module housing encompasses the fire protection system and the fire protection system is designed for fire extinguishing within the module housing. In other words, the extinguishing agent interface can be located on the coolant side of the module housing, especially in the vertical direction below the DC interface and / or the AC interface. This offers the advantage that, in the event of a leak at the extinguishing agent interface during assembly, the electrical components are not affected. Furthermore, this increases the spatial distance to the electrical components.

[0069] Additionally, the cooling system interface can include the extinguishing agent interface, and in particular, the fire protection system can be designed to use the cooling medium as an extinguishing agent in the event of a fire. This offers the advantage that the rectifier module can be designed more compactly and, in particular, requires fewer connections, which simplifies installation. 2024 PF00840

[0070] 12

[0071] The invention also relates to an electrolysis system comprising at least one electrolyzer and optionally a transformer system for electrical connection to an electrical grid, including the rectifier module. In other words, the electrolysis system can be configured to produce an energy carrier, such as hydrogen, from electrical power supplied by the transformer system via the rectifier module by means of electrolysis. The transformer system can include a transformer configured to supply alternating current from the electrical grid for electrolysis. The rectifier module can be configured to convert the alternating current from the transformer into direct current for electrolysis. The rectifier module can be designed modularly, as described above.This offers the advantage that the electrolysis system is easier and faster to set up.

[0072] The electrolysis system also included embodiments, in particular the embodiments of the rectifier module, which offer further advantages.

[0073] One embodiment provides that the electrolysis system includes a protective shield configured to provide electromagnetic shielding, at least for the electrolyzer, wherein the module housing and the protective shield are dimensioned such that the user interface of the control system interface is accessible to a user outside the protective shield. In other words, the protective shield can be configured as a protective fence or a Faraday cage, wherein the rectifier module, in particular the user interface for the control system interface, and the protective shield are dimensioned such that the user interface is accessible to a user outside the protective shield. For this purpose, the user interface can be arranged on an outside of the module housing, in particular on the control system side of the module housing. The user interface can be 2024 PF00840

[0074] 13

[0075] It must be designed to provide electromagnetic shielding, in particular from the DC busbar and / or the AC busbar, in conjunction with the protective shielding. This offers the advantage of allowing safe access to the control system for monitoring purposes during operation.

[0076] The invention also includes implementations that comprise a combination of the features of several of the described embodiments.

[0077] Brief description of the characters

[0078] Preferred further embodiments of the invention are explained in more detail by the following description of the figures. These show:

[0079] Figure 1 shows a schematic top view of the electrolysis system including the rectifier module;

[0080] Figure 2 shows a schematic first perspective view of the rectifier module looking towards one side of the electrolyzer, which is facing the electrolyzer;

[0081] Figure 3 shows a schematic second perspective view of the rectifier module looking towards a transformer side facing a transformer; and

[0082] Figure 4 shows a schematic side view of a cooling system side of the rectifier module.

[0083] Figure 1 shows a schematic top view of an electrolysis system 1, which comprises at least one electrolyzer 2, in particular an array of several electrolyzers 2. The electrolysis system 1 has the rectifier module 4, which forms an interface to the transformer system 3, which comprises at least one transformer and optionally a tap changer (not shown!) and is connected to the 2024 PF00840

[0084] 14

[0085] The electrolyzer 2 is electrically connected to the electrical network (not shown!). It is designed to produce an energy carrier, such as hydrogen, using the electrical power provided by the rectifier module 4.

[0086] The rectifier system 10 can, for example, be a Thyripol® rectifier system. In addition, the rectifier system 10 requires further components, such as a safety device, a shutdown device, and a cooling system. Due to the relatively high heat load during the supply of direct current to the electrolyzer 2, the rectifier system 10 must be cooled by a cooling medium, such as water, and thus constantly supplied with the cooling medium. The installation of such a rectifier system 10 takes place on-site at the construction site of the electrolysis system 1 using prefabricated sub-components. However, this requires time-consuming and labor-intensive testing routines that must be repeated during the construction of each electrolysis system 1 before the rectifier system 10 can be put into operation. This can be improved by using the prefabricated rectifier module 4.

[0087] The rectifier module 4 comprises a rectifier system 11 arranged in a module housing 9, which includes at least one rectifier and a cooling system 22 for cooling the rectifier. The module housing 9 is dimensioned for road and / or rail transport. In particular, the rectifier module 4 is dimensioned with respect to its total weight for road and / or rail transport. The rectifier system 1 is pre-assembled in the module housing 9, so that the module housing 9, comprising the rectifier system 10, can be transported as a whole to the construction site of the electrolysis system 1 by road and / or rail transport and can be connected on site only electrically to the electrolyzer 2, in particular the array of electrolyzers 2, the transformer system 3, a cooling medium supply system (not shown), and a control system (not shown).

[0088] 15

[0089] (as shown) needs to be connected. The control system can include a control system power supply. This accelerates the construction time of the electrolysis system 1. This improves the production of electrolysis systems 1 by allowing a mass-produced, pre-assembled rectifier module 4 to be transported as a whole to the construction site of the electrolysis system 1 and only needing to be connected.

[0090] The rectifier module 4 thus forms an interface between the electrolyzer 2 and the transformer system 3, wherein the rectifier module 4 is electrically connected to the electrolyzer, in particular the array of electrolyzers 2 and the transformer system 3. Furthermore, the rectifier module 4 is separated from the transformer system 3 by means of a transformer shield 8.

[0091] The rectifier system 11 has a linear arrangement in the rectifier module 4 along a longitudinal direction x, so that the rectifier system 11 can be easily serviced via a service level 19 running parallel in the longitudinal direction x, which can be accessed via the staircase 26.

[0092] During operation of the electrolysis system 1, the electrolysis system 1 is surrounded by a protective shield 5, which is specifically designed to provide electromagnetic shielding of at least the electrolyzer 2, and in particular of the array of electrolyzers 2. The protective shield 5 can, for example, be a fence or a cage, in particular a Faraday cage, which surrounds the electrolyzer 2 and the module housing 9. The protective shield 5 and the module housing 9 are dimensioned such that a user interface 7 for a control system of the rectifier system 10 is accessible to a user outside the protective shield 5. In particular, the user interface 7 and the protective shield 5 are designed to provide electromagnetic shielding for a 2024 PF00840

[0093] 16

[0094] To provide users, especially in a transition area between the protective shield 5 and the user interface 7.

[0095] The rectifier module 4 is described in more detail below. Figure 2 shows a first perspective view of the rectifier module 4 on an electrolyzer side 15 of the module housing 9, which, when the rectifier module 4 is arranged in the electrolysis system 1, faces the electrolyzer 2, in particular the array of electrolyzers 2. The rectifier module 4 comprises the module housing 9 and a rectifier system 10 arranged therein. The rectifier system 10 comprises at least one rectifier 11, which is configured to convert an alternating current from the transformer system 3 into a direct current for the electrolyzer 2, and a cooling system 22, which is configured to cool the rectifier 11 during operation.

[0096] Additionally, the rectifier system 10 is arranged in the module housing 9 in a linear arrangement, particularly in the longitudinal direction x. This allows easy access to the individual components of the rectifier system 10 via the service level 19, which runs parallel to the linear arrangement of the rectifier system 10, particularly in the longitudinal direction x.

[0097] Additionally, the rectifier system 10 has a control system interface 6, which in particular includes the user interface 7. The control system interface 6 is located on the control system side 29 of the module housing 9. Furthermore, the linear arrangement of the rectifier system 10 along the longitudinal direction x also includes the control system interface 6 and optionally the user interface 7.

[0098] Additionally, the control system interface 6 and, in particular, the user interface are arranged on an outer side of the module housing 9, specifically on the outside of the control system side 29. 2024 PF00840

[0099] 17

[0100] The rectifier module 4, in particular the module housing 9, has an AC interface (not shown!) which is designed for electrical connection of the rectifier system 10, in particular the rectifier 11, to the external transformer system 3. Furthermore, the rectifier module 4, in particular the module housing 9, has a DC interface 13 which is designed for electrical connection of the rectifier system 10, in particular the rectifier 11, to the electrolyzer 2.

[0101] Additionally, the AC interface and the DC interface 13 are arranged on different sides 14, 15 of the module housing 9, in particular on opposite sides 14, 15. For example, the DC interface 13 can be arranged on the electrolyzer side 14 and the AC interface on the transformer side 15 of the module housing 9. The electrolyzer side 14 and the transformer side 15 can be adjacent to each other, in particular orthogonal to each other, or opposite each other. This can achieve improved electrical protection.

[0102] A DC busbar 16 is arranged in the module housing 9, which electrically connects the DC interface 13 to the rectifier 11. Furthermore, an AC busbar (not shown!) is arranged in the module housing 9, which is designed to electrically connect the rectifier 11 to the AC interface.

[0103] Additionally, the module housing 9 has at least one double-walled side 18. For example, the bottom side 27 and / or the electrolyzer side 14 and / or the transformer side 15 and / or the top side 28 and / or the control system side 29 of the module housing 9 can be double-walled. The respective double-walled sides 18 can be arranged on different sides of the module housing 9, in particular on opposite sides 14, 15, 27, 28, 29, 30 of the module housing 9. The DC bus 16 and / or the 2024 PF00840

[0104] 18

[0105] AC busbars can each be arranged within the various double-walled sides 18.

[0106] Additionally, the DC busbar 16 and / or the AC busbar can be arranged within the double floor 18 on the bottom side 27 of the module housing 9. The inner wall of the double floor 18 can form the service level 19, while the ground 20 can form an outer wall if the module housing 9 rests with its bottom side 27 on the ground 20. The DC busbar can therefore be arranged between the floor 18 and the ground 20. This results in improved electrical shielding and easier assembly of the electrolyzer array 2.

[0107] Additionally, the double bottom 18 in an interior of the module housing 9, in particular an inner wall of the double-walled bottom side 27, on a side facing away from the DC busbar 16 and / or the AC busbar, forms the service level 19 for the rectifier system 10 in the interior of the module housing 9. Additionally, the service level 19 is designed to provide electromagnetic shielding for the DC busbar 16.

[0108] Additionally, the DC interface 13 is arranged on an electrolyzer side 14 of the module housing 9 such that it is located in a vertical direction z between the service level 19 and the ground 20. The DC busbar 16 can therefore be arranged in the vertical direction z below the service level 19 in the double-walled bottom side 27 of the module housing 9.

[0109] Additionally or alternatively, the AC interface 12 can be located on the transformer side 15 of the module housing 9 in the vertical direction z between the service level and the top 28 of the module housing 9.

[0110] Additionally or alternatively, the AC interface 12 can be located on the transformer side 15 of the module housing 92024 PF00840.

[0111] 19

[0112] It should be arranged so that it is located in a vertical direction z between the service level 19 and the ground 20.

[0113] This simplifies the assembly of the electrolysis system. The rectifier module 4 can simply be placed over the busbars of the electrolyzer array 2.

[0114] The DC busbar 16 and / or the AC busbar can each be made of copper and / or aluminum. In particular, the DC busbar 16 can be made of aluminum and the AC busbar of copper. This achieves an optimal compromise between manufacturing costs and operational efficiency.

[0115] Furthermore, the module housing 9 includes a cooling system interface (not shown!), specifically on a cooling system side 30 of the module housing 9. The cooling system interface is designed for supplying and discharging a cooling medium for the cooling system 22. The cooling medium can be, for example, a gas or a liquid, in particular demineralized water. The cooling system 22 can be a liquid-based cooling system and / or a gas-based cooling system, in particular a ventilation system. The cooling system side 30 is orthogonal to the electrolyzer side 14 and / or the transformer side 15 of the module housing 9. Additionally, the cooling system side 30 is opposite the control system side 29. This ensures an optimal distance between the cooling system interface and the electrical components.

[0116] Furthermore, the rectifier module 4 has a ventilation system (not shown!) designed for positive pressure ventilation and / or negative pressure ventilation of the module housing 9. The ventilation system is for regulating air humidity and / or for enhancing natural air circulation within the module housing 9, in particular an increasing air supply in the interior of the module housing 9 in the vertical direction z. 2024 PF00840

[0117] 20

[0118] Module housing 9, designed. For this purpose, the module housing 9 is further designed to be weatherproof and / or thermally insulated.

[0119] The rectifier module 4 further comprises a control interface 6, which is arranged, in particular, on an outer surface of the module housing 9. Additionally, the control interface is arranged externally on a control side 29 of the module housing 9, which faces away from, and is in particular different from, the sides 14 and 15 of the DC interface 13 and the AC interface 12. For example, the control side can be orthogonal to the electrolyzer side 14 and / or to the transformer side 15.

[0120] In addition, the control system interface 6 has a user interface 7, which is designed for measurement and / or control, in particular for the management of electrical protection functions.

[0121] The module housing 9 further comprises a lifting device for a component of the rectifier system 10, in particular the rectifier 11 and / or the cooling system 22. The lifting device may, for example, include a crane and / or a pulley system. Additionally, the lifting device is designed to move at least partially over the service level 19, in particular along the longitudinal direction x. This facilitates the replacement of components of the rectifier system 10 during maintenance.

[0122] The rectifier module 4 further includes a potential grounding interface (not shown!) for the potential grounding of an electrostatic and / or induced electrical voltage. This ensures electromagnetic compatibility. For example, the potential grounding interface can be designed as a double-walled side 18 of the module housing 9, in particular as the double bottom 18. 2024 PF00840

[0123] 21

[0124] The rectifier module 4 also includes an extinguishing agent interface (not shown!) for supplying an extinguishing agent to a fire protection system (not shown!). The module housing 9 can contain the fire protection system, which is designed for fire extinguishing within the module housing 9. Additionally, the fire protection system is designed to generate negative pressure within the module housing 9 in the event of a fire.

[0125] Furthermore, the module housing 4 has an access opening 24 through which the service level 19 can be reached, advantageously via the staircase 26. The access opening 24 can be arranged on the electrolyzer side 14 or the transformer side 15 of the module housing 9.

[0126] Additionally, the module housing 4 has at least one second access opening 25, which can serve as an emergency exit. The second access opening 25 can also be located on the electrolyzer side 14 or the transformer side 15 of the module housing 9.

[0127] Furthermore, the module housing 4 has external dimensions that make it suitable for road and / or rail transport. Additionally, the rectifier module 4 has a total weight that makes it suitable for road and / or rail transport. For example, the total weight can be 27 tons or less.

[0128] Figure 3 shows a second schematic perspective view of the transformer side 15 of the rectifier module 4. When the rectifier module 4 is arranged in the electrolysis system 1, the transformer side 15 faces the transformer system 3. Figure 3 shows some of the same elements as Figure 2, for whose description reference is made to Figure 2.

[0129] The AC interface 12 is located on the transformer side 15 of the module housing 9. The 2024 PF00840

[0130] 22

[0131] AC interface 12 comprises an AC busbar 17, which is made in particular of copper or aluminium.

[0132] In addition, the AC interface 15 is arranged on a different side 15 of the module housing 9 than the DC interface 13, which in particular includes the DC bus 16.

[0133] Additionally, the DC busbar 16 and / or the AC busbar 17 is arranged within a double-walled side 18, in particular on an outer side of the module housing 9 or on an outer side of the double-walled side 18. This allows for improved electrical insulation and more compact dimensions of the module housing 9.

[0134] Additionally, the AC interface 12 can be arranged on the transformer side 15 of the module housing 9 such that it is located in the vertical direction z between the inner wall of the double-walled side 18, in particular the service level 19, and a top surface 28 of the module housing 9.

[0135] This allows good electrical isolation from the DC interface 13 to be achieved.

[0136] Additionally, the DC interface 13 can be arranged on the electrolyzer side 14 of the module housing 9 such that it is located in the vertical direction z between the inner wall of the double-walled side 18, in particular the service level 19, and the ground 20. This combination of the arrangement of the DC interface 13 and the AC interface 12 reduces the overall assembly effort during the installation of the electrolysis system 1.

[0137] Figure 4 shows a schematic side view of the rectifier module 4 on the cooling system side 30 of the module housing 9. Figure 4 shows some of the same elements as Figures 2 and 3, for whose description reference is made to Figures 2 and 3. Figure 4 shows a cooling system interface 21, via 2024 PF00840

[0138] 23

[0139] which supplies and removes a cooling medium for the cooling system 22. The cooling medium can be a gas or a liquid. The cooling system interface 21 is located on a cooling system side 30 of the module housing 9, which is optionally different from the electrolyzer side 14 and / or the transformer side 15 and / or the control system side 29 and / or the top 29 and / or the bottom 27 of the module housing 9.

[0140] Additionally, the cooling system side 30 is orthogonal to the electrolyzer side 14 and / or the transformer side 15 and / or to the top 28 and / or to the bottom side 27.

[0141] Additionally or alternatively, the cooling system side 30 is opposite the control system side 29. This can improve system reliability.

[0142] Additionally, the cooling system interface 21 can be arranged in the vertical direction z below the DC interface 13 and / or the AC interface 12. This can improve system safety in the event of a leak of the cooling medium at the cooling system interface 21.

[0143] Additionally, the cooling system interface 21 can be arranged on an outer side of a double-walled side 18. The cooling system side 30 can therefore, in particular, be designed as a double wall.

[0144] Overall, a rectifier module 4 is proposed, which:

[0145] is located in an enclosure, the module housing 9; - enables the absorption of loads, thus allowing transportability;

[0146] - has geometric dimensions as well as a total weight that are based on typical limits for road and / or rail transport;

[0147] - has the following interfaces: electrical power interfaces (AC for the 2024 PF00840)

[0148] 24

[0149] Transformer system 3, direct current for the electrolyzer 2), interfaces for cooling water or to a compression cooling system, interface 6 for signals and control technology, some of which are designed as low-voltage connections, interface for interior ventilation, interface for potential dissipation (electrostatically generated as well as inductively generated voltages by alternating fields);

[0150] - has load points for lifting equipment and / or forklifts;

[0151] - the electrical power interfaces for direct current and alternating current are located on different sides of the module housing 9;

[0152] - has an AC interface 12 to the transformer system 3 made of copper or optionally of aluminum and / or has a DC interface 12 made of aluminum or optionally of copper; - is fully pre-assembled;

[0153] - has an interior ventilation system designed to operate from bottom to top in the vertical direction z, and optionally includes a relative humidity rating;

[0154] - if condensation is not permitted, a relative humidity measurement is used for protection;

[0155] - has a fire detection system and a fire suppression system, for example a CO2-based fire suppression system, or an interface to the fire suppression system;

[0156] - has one escape route and optionally a second escape route or exit, i.e. at least two access openings;

[0157] - has a lifting device (ceiling crane) for carrying out maintenance and repair work;

[0158] - has thermal insulation, in particular of the module housing 9.

[0159] Preferred embodiments are described below with reference to the figures. Identical, similar, or equivalent elements in the different figures are denoted by 2024 PF00840.

[0160] 25

[0161] The elements are marked with identical reference symbols, and repeated descriptions of these elements are sometimes omitted to avoid redundancies.

Claims

2024 PF00840 26 Patent claims 1. Rectifier module (4) for an electrolyzer (2) comprising a module housing (9) which includes a rectifier system (10) which in particular has a linear arrangement along a longitudinal direction (x) , wherein the rectifier system (10) comprises at least one rectifier (11) which is configured to provide a direct current for the electrolyzer (2) from an alternating current, and in particular a cooling system (22) for the rectifier (11) , wherein the module housing (9) has an AC interface (12) for an electrical connection of the rectifier system (10) to a transformer and / or a DC interface (13) for the electrical connection of the rectifier system (10) to the electrolyzer ( 2 ) includes st , characterized by the fact that s the rectifier system ( 10 ) is arranged in the module housing ( 9 ).

2. Rectifier module (4) according to claim 1, characterized in that the AC interface (12) and the DC interface (13) are arranged on different, in particular opposite, sides (14, 15) of the module housing (9).

3. Rectifier module (4) according to one of the preceding claims, characterized in that the module housing (9) has a double-walled side (18), in particular a double bottom (18), within which a DC busbar (16) which electrically connects the DC interface (13) to a DC side of the rectifier (11) and / or an AC busbar (17) which electrically connects the AC interface (12) to an AC side of the rectifier (11) is arranged. 2024 PF00840 27 4. Rectifier module (4) according to claim 3, characterized in that the double bottom (18) in an interior of the module housing (9) on a bottom side facing away from the DC busbar (16) and / or the AC busbar (17) forms a service level (19) for the rectifier system (10) in the interior of the module housing (9), wherein in particular the DC interface (13) is arranged on a side (14) of the module housing (9) such that it is located in a vertical direction (z) between the service level (19) and the ground (20).

5. Rectifier module ( 4 ) according to one of the preceding claims , characterized in that the AC busbar ( 17 ) is formed from copper and / or from aluminium and / or the DC busbar ( 16 ) is formed from aluminium and / or from copper .

6. Rectifier module (4) according to one of the preceding claims, characterized in that the module housing (9) comprises a cooling system interface (21) for the cooling system (22), wherein in particular the cooling system interface (21) is designed for supplying and discharging a cooling medium for the cooling system (22).

7. Rectifier module (4) according to one of the preceding claims, characterized in that the module housing (9) comprises a ventilation system, which is designed for positive pressure ventilation and / or negative pressure ventilation of the module housing (9), wherein in particular the ventilation system is designed for humidity control and / or for enhancing natural air circulation in the module housing (9), in particular an upward air supply in the interior of the module housing (9).

8. Rectifier module (4) according to one of the preceding claims, characterized in that the module housing 2024 PF00840 28 ( 9 ) is weatherproof and / or thermally insulated .

9. Rectifier module (4) according to one of the preceding claims, characterized in that the module comprises a control technology interface (6), wherein in particular the control technology interface (6) comprises a user interface (7) arranged on an outside of the module housing (9).

10. Rectifier module ( 4 ) according to one of the preceding claims , characterized in that ses , in particular the module housing ( 9 ) , is designed for road and / or rail transport .

11. Rectifier module (4) according to one of the preceding claims, characterized in that the module housing (9) comprises a lifting device for a component of the rectifier system (10), in particular the rectifier (11) and / or the cooling system (22).

12. Rectifier module (4) according to one of the preceding claims, characterized in that the module housing (9) comprises a potential dissipation interface for a potential dissipation of an electrostatic and / or an induced electrical voltage.

13. Rectifier module (4) according to one of the preceding claims, characterized in that the module housing (9) comprises an extinguishing medium interface for supplying an extinguishing medium for a fire protection system, wherein in particular the module housing (9) comprises the fire protection system and the fire protection system is designed for fire extinguishing in the interior of the module housing (9).

14. Electrolysis system (1) comprising at least one electrolyzer (2) and optionally a transformer system (3) for electrical connection to an electrical network, 2024 PF00840 29 encompasses the rectifier module ( 4 ) according to one of the preceding claims .

15. Electrolysis system (1) according to claim 14, characterized in that it comprises a protective shield (5) which is designed to provide electromagnetic shielding at least of the electrolyzer (2), wherein the module housing (9) and the protective shield (5) are dimensioned such that the user interface (7) of the control interface (6) is accessible to a user outside the protective shield (5).

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