Energy storage arrangement

Abstract

The invention relates to an energy storage arrangement with a redox energy storage device (7) comprising several redox flow cells (8) and connected via two channel systems to two electrolyte containers, each containing an electrically conductive electrolyte (5), and an MHD module comprising an evaluation and control unit and, for each of the individual redox flow cells (8), two magnetohydrodynamic pump modules (20) integrated into the individual redox flow cells (8), wherein the evaluation and control unit is configured to control the magnetohydrodynamic pump modules (20) via at least one control unit (7.2), wherein the two magnetohydrodynamic pump modules (20) each comprise at least one magnet device (24) and one electrode device (22), which is configured to receive a signal from the control unit (7.2).2) to conduct the supplied electric current within the corresponding redox flow cell (8) through the corresponding electrically conductive electrolyte (5), so that, through interaction with a magnetic field generated by the magnetic device (24), a Lorentz force is created which selectively accelerates the electrically conductive electrolyte (5) within the corresponding redox flow cell (8), so that a resulting pressure build-up causes a desired volume flow of the electrically conductive electrolyte (5) through the corresponding channel system and the redox energy storage (7).

Description

[0001] The invention relates to an energy storage arrangement with a redox energy storage device comprising several redox flow cells and connected via at least two channel systems to at least two electrolyte containers, each containing an electrically conductive electrolyte.

[0002] Magnetohydrodynamics (MHD) is a subfield of physics. It describes the behavior of electrically conductive fluids permeated by magnetic and electric fields. Magnetohydrodynamics in the narrower sense deals with liquids, especially plasmas, which are described as fluids within the framework of MHD. Typical applications of magnetohydrodynamics include flow control and flow measurement in metallurgy and semiconductor single-crystal growth. Disclosure of the invention

[0003] The energy storage arrangement with the features of independent claim 1 has the advantage that an MHD module (magnetohydrodynamic module) with magnetohydrodynamic pump modules, instead of mechanical pumps, moves electrolytes from at least two electrolyte containers within the channel systems of the energy storage arrangement. The electrolytes in an energy storage arrangement with a redox energy storage system are electrically conductive and therefore ideally suited for magnetohydrodynamic pump modules. By using magnetohydrodynamic pump modules integrated into the individual redox flow cells, the volumetric flow rates of the electrolytes within the individual redox flow cells of the energy storage arrangement can be better controlled and adjusted.

[0004] Embodiments of the present invention provide an energy storage arrangement with a redox energy storage device comprising several redox flow cells and connected via at least two channel systems to at least two electrolyte containers, each containing an electrically conductive electrolyte, and an MHD module comprising at least one evaluation and control unit and at least two magnetohydrodynamic pump modules integrated into each of the individual redox flow cells. The at least one evaluation and control unit is configured to control the magnetohydrodynamic pump modules via at least one control unit.The at least two magnetohydrodynamic pump modules comprise at least one magnet device and one electrode device each, which is designed to conduct an electric current provided by the at least one control unit through the corresponding electrically conductive electrolyte within the corresponding redox flow cell, so that, in conjunction with a magnetic field generated by the at least one magnet device, a Lorentz force is created which selectively accelerates the electrically conductive electrolyte within the corresponding redox flow cell, so that a resulting pressure build-up causes a desired volume flow of the electrically conductive electrolyte through the corresponding channel system and the redox energy storage.

[0005] A redox energy storage system is defined as an energy storage device comprising multiple redox flow cells connected via at least two channel systems to at least two electrolyte reservoirs, each containing an electrically conductive electrolyte serving as the storage medium. The electrolytes are pumped through the at least one redox flow cell by at least two magnetohydrodynamic pump modules to charge and discharge the redox energy storage system. This process binds electrons. The amount of electrolyte determines the capacity, while the number of redox flow cells determines the power output of the redox energy storage system. This allows the power output and capacity of the redox energy storage system to be set independently.During the charging process of the redox energy storage system, ions migrate through an ion-permeable membrane in at least one redox flow cell, triggering a redox reaction in which electrical energy is converted into chemical energy. Reduction occurs at a first electrode in a negative half-cell, and oxidation takes place at a second electrode in a positive half-cell of the at least one redox flow cell. During the discharging process of the redox energy storage system, the redox process is reversed.

[0006] The term "at least one evaluation and control unit" can be understood as an electrical circuit or component that processes or evaluates acquired sensor signals and can generate and output corresponding control signals or the electrical current for the at least two magnetohydrodynamic pump modules. For this purpose, the evaluation and control unit can have at least one interface, which may be implemented in hardware and / or software. In the case of a hardware implementation, the interfaces can, for example, be part of a so-called system ASIC, which incorporates various functions of the evaluation and control unit. However, it is also possible that the interfaces are separate integrated circuits or consist at least partially of discrete components.In software-based training, the interfaces can be software modules, such as those found on a microcontroller alongside other software modules. A computer program product with program code stored on a machine-readable medium like semiconductor memory, hard disk storage, or optical memory is also advantageous. This code is used to perform the evaluation when the program is executed by the evaluation and control unit.

[0007] The measures and further developments listed in the dependent claims enable advantageous improvements to the energy storage arrangement specified in independent claim 1.

[0008] A particular advantage is that in each individual redox flow cell, a first magnetohydrodynamic pump module can be integrated into a positive half-cell of the corresponding redox flow cell, and a second magnetohydrodynamic pump module can be integrated into a negative half-cell of the corresponding redox flow cell. This allows the volumetric flow rates of the corresponding electrolytes in the half-cells of the corresponding redox flow cell to be controlled independently of each other.

[0009] In an advantageous embodiment of the energy storage arrangement, the at least one evaluation and control unit can be further configured to generate the electrical current for the electrode devices of the magnetohydrodynamic pump modules from the electrical current of the redox energy storage system or from an external energy source and to transmit this current to the magnetohydrodynamic pump modules via the at least one control unit. This means that the energy for the at least one evaluation and control unit and the magnetohydrodynamic pump modules can be supplied by the redox energy storage system during a discharge process or by the grid or another suitable energy source during a charging process. Furthermore, the at least one evaluation and control unit can switch between the external energy source and the redox energy storage system depending on the state of charge of the redox energy storage system.

[0010] In a further advantageous embodiment of the energy storage arrangement, the at least one evaluation and control unit can be further configured to individually adjust the flow velocity in the individual redox flow cells and the resulting output power of each redox flow cell via the at least one control unit and the corresponding magnetohydrodynamic pump modules. In this configuration, the current flow velocity in the corresponding redox flow cell can also be measured in each magnetohydrodynamic pump module based on MHD (magnetohydrodynamic hardness) and fed back to the evaluation and control unit via the at least one control unit. This enables very precise adjustment of the flow velocity in the redox flow cells.

[0011] In a further advantageous embodiment of the energy storage arrangement, the at least one evaluation and control unit can be further configured to combine the output power of the individual redox flow cells into a total output power of the redox energy storage system via at least one power switching unit by means of parallel and / or series connection. This allows the total output power of the redox energy storage system to be set and specified as desired.

[0012] In a further advantageous embodiment of the energy storage arrangement, the electrode devices can each comprise two electrodes, a first electrode of which can introduce an electric current flow with a predetermined current density into the corresponding electrically conductive electrolyte within the corresponding redox flow cell, and a second electrode of which can discharge the electric current flow from the electrically conductive electrolyte within the corresponding redox flow cell. The two electrodes of the individual electrode devices can be positioned such that the electric current flow is perpendicular to the generated magnetic field.

[0013] In a further advantageous embodiment of the energy storage arrangement, at least two magnetohydrodynamic pump modules can have a common magnetic device. This means that the at least two magnetohydrodynamic pump modules can each have an electrode device but a common magnetic device.

[0014] In a further advantageous embodiment of the energy storage arrangement, at least two redox flow cells can have a common reaction membrane. This means that the two half-cells of the at least two redox flow cells are separated from each other by a common reaction membrane.

[0015] In a further advantageous embodiment of the energy storage arrangement, the magnetic devices of the individual magnetohydrodynamic pump modules can each comprise at least one magnet, which can be designed as a permanent magnet or as an electromagnet. In the permanent magnet configuration, the at least one evaluation and control unit can selectively adjust the resulting Lorentz force in the half-cell of the corresponding redox flow cell and the desired volume flow rate of the electrically conductive electrolyte via the supplied electric current. In the electromagnet configuration, the at least one evaluation and control unit can additionally or alternatively selectively adjust the resulting Lorentz force in the half-cell of the corresponding redox flow cell and the desired volume flow rate of the electrically conductive electrolyte via the magnetic field provided by the magnetic device.

[0016] In a further advantageous embodiment of the energy storage arrangement, the multiple redox flow cells can be rectangular and arranged parallel to one another or parallel and offset from each other. Alternatively, the multiple redox flow cells can be honeycomb-shaped and form a honeycomb structure. Furthermore, the redox flow cells can be arranged in at least two layers within the redox energy storage system.

[0017] In a further advantageous embodiment of the energy storage arrangement, the at least one control unit can be arranged outside the redox energy storage system or integrated into it. Similarly, the at least one power switching unit can be arranged outside the redox energy storage system or integrated into it.

[0018] In a further advantageous embodiment of the energy storage arrangement, at least one fluid channel of the at least two channel systems can be thermally coupled to at least one electrical component of the energy storage arrangement, so that the electrically conductive electrolyte absorbs and transports waste heat from the at least one electrical component. The at least one electrical component of the energy storage arrangement can, for example, be the at least one evaluation and control unit and / or the at least one control unit and / or the at least one power switching unit.

[0019] Exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description. In the drawings, identical reference numerals denote components or elements that perform the same or analogous functions. Brief description of the drawings Fig. Figure 1 shows a schematic representation of a first embodiment of an energy storage arrangement according to the invention. Fig. Figure 2 shows a schematic sectional view of a first embodiment of a redox energy storage device for the energy storage arrangement according to the invention. Fig. 1. Fig. Figure 3 shows a schematic sectional view of an embodiment of a magnetohydrodynamic pump module for the redox energy storage system. Fig. 2. Fig. Figure 4 shows a schematic sectional view of a second embodiment of a redox energy storage device for the energy storage arrangement according to the invention. Fig. 1. Fig. Figure 5 shows a schematic sectional view of a detail V from Fig. 4. Embodiments of the invention

[0020] As from Fig. As can be seen from Figures 1 to 5, the illustrated embodiment of an energy storage arrangement 1 according to the invention comprises a redox energy storage device 7, which includes several redox flow cells 8 and is connected via at least two channel systems 4 to at least two electrolyte containers 3, in each of which an electrically conductive electrolyte 5 is stored, and an MHD module 10 (magnetohydrodynamic module), which includes at least one evaluation and control unit 12 and at least two magnetohydrodynamic pump modules 20 integrated into each of the individual redox flow cells 8. The at least one evaluation and control unit 12 is configured to control the magnetohydrodynamic pump modules 20 via at least one control unit 7.2.Here, the at least two magnetohydrodynamic pump modules 20 comprise at least one magnet device 24 and each an electrode device 22, which is configured to conduct an electric current provided by the at least one control unit 7.2 within the corresponding redox flow cell 8 through the corresponding electrically conductive electrolyte 5, so that, in conjunction with a magnetic field generated by the at least one magnet device 24, a Lorentz force is created which selectively accelerates the electrically conductive electrolyte 5 within the corresponding redox flow cell 8, so that a resulting pressure build-up causes a desired volume flow of the electrically conductive electrolyte 5 through the corresponding channel system 4 and the redox energy storage 7.

[0021] As from Fig. As can be seen further in Figure 1, the illustrated embodiment of the energy storage arrangement 1 comprises two electrolyte containers 3 and a redox energy storage device 7. The redox energy storage device 7 is connected via a first channel system 4A to a first electrolyte container 3A, in which a first electrolyte 5A is stored. The redox energy storage device is connected via a second channel system 4B to a second electrolyte container 3B, in which a second electrolyte 5B is stored. Alternatively, the two electrolyte containers 3 can also be designed as separate compartments or volumes within a single container.

[0022] As from Fig. 2 and Fig. As can be seen further in Figure 4, the illustrated redox energy storage devices 7 in the illustrated embodiments each comprise three redox flow cells 8. Each of the three redox flow cells 8 comprises a positive half-cell 8A, which is connected to the first electrolyte reservoir 3A via the first channel system 4A, and a negative half-cell 8B, which is connected to the second electrolyte reservoir 3B via the second channel system 4B. The two half-cells 8A, 8B of the three redox flow cells 8 are each separated from each other by a reaction membrane 8.1. The two electrolytes 5 are pumped through the redox flow cells 8 for charging and discharging the redox energy storage device 7. This allows electrons to be bound. Here, the amount of electrolytes 5 determines the capacity and the number of redox flow cells 8 determines the power of the redox energy storage device 7. During a charging process of the redox energy storage device 7, ions migrate through the ion-permeable reaction membrane 8.1 and lead to a redox reaction in which electrical energy is converted into chemical energy. In the redox flow cells 8, reduction takes place at a first electrode 8.3 in the negative half-cell 8B, and oxidation takes place at a second electrode 8.2 in the positive half-cell 8A. The first electrode 8.3 of each redox flow cell 8 can be connected to a negative contact (-) of an electrical interface 9 via a first power switching unit 7.3. The second electrode 8.2 of each redox flow cell 8 can be connected to the positive contact (+) of the electrical interface 9 via a second power switching unit 7.3. During the discharge process of the redox energy storage device 7, the redox process is reversed.

[0023] As from Fig. 1, Fig. 2 and Fig. As can be seen further in Figure 4, the MHD module 10 in the illustrated embodiment of the energy storage arrangement 1 comprises an evaluation and control unit 12, two control units 7.2, and six magnetohydrodynamic pump modules 20. In each of the individual redox flow cells 8, a first magnetohydrodynamic pump module 20A is integrated into the positive half-cell 8A of the corresponding redox flow cell 8. A second magnetohydrodynamic pump module 20B is integrated into a negative half-cell 8B of the corresponding redox flow cell 8. The positive half-cells 8A are fluidically connected via corresponding channels arranged within a housing 7.1 of the redox energy storage device 7 between an inlet 4.1A and a return 4.2A of the first channel system 4A. In the illustrated embodiments of the redox energy storage device 7, the positive half-cells 8A of the redox flow cells 8 are connected to the inlet 4 via simple, unspecified membrane valves.The negative half-cells 8B are fluidically connected between an inlet 4.1B and a return 4.2B of the second channel system 4B via corresponding channels arranged within the housing 7.1 of the redox energy storage device 7. In the illustrated embodiments of the redox energy storage device 7, the negative half-cells 8B of the redox flow cells 8 are also fluidically connected to the inlet 4.1B and the return 4.2B via simple, unspecified diaphragm valves. In this process, the membrane valves of the negative half-cell 8B of the corresponding redox flow cell 8 open when the corresponding second magnetohydrodynamic pump module 20B is activated and generates the volume flow.Should a section of the common reaction membrane 8.1 be defective, the magnetohydrodynamic pump modules 20 in the half-cells 8A, 8B of the corresponding redox flow cell 8 can be deactivated. This closes the membrane valves of the half-cells 8A, 8B of the corresponding redox flow cell 8, and the defective section of the common reaction membrane 8.1 is isolated from the volume flow of the electrolytes 5A, 5B.

[0024] As from Fig. 2 and Fig. As can be seen further in Figure 3, the three redox flow cells 8 in a first embodiment of the redox energy storage device 7A have a rectangular shape and a common reaction membrane 8.1 and are arranged longitudinally in a row above one another. As can be seen from Fig. As can be seen further in Figure 2, the first three electrodes 8.3 of the negative half-cells 8B of the three redox flow cells 8 are each electrically connected to a first power switching unit 7.3 on the right in the diagram. The second three electrodes 8.2 of the positive half-cells 8A of the three redox flow cells 8 are each electrically connected to a second power switching unit 7.3 on the left in the diagram.

[0025] As from Fig. As can be seen further in Figure 3, the electrode devices 22 of the individual magnetohydrodynamic pump modules 20 in the illustrated first embodiment of the redox energy storage system 7A each comprise two electrodes 22A, 22B. A first electrode 22A, which is electrically connected to the evaluation and control unit 12 via a control unit 7.2, introduces an electric current with a predetermined current density into the electrically conductive electrolyte 5 in the corresponding half-cell 8A, 8B. A second electrode 22B, which is electrically connected to the evaluation and control unit 12 via the control unit 7.2, conducts the electric current out of the electrically conductive electrolyte 5 in the corresponding half-cell 8A, 8B. The two electrodes 22A, 22B of the electrode devices 22 of the magnetohydrodynamic pump modules 20 are positioned such that the electric current flows perpendicular to the generated magnetic field.

[0026] As from Fig. As can be seen further in Figure 3, the magnetic device 24 of the individual magnetohydrodynamic pump modules 20 in the illustrated first embodiment of the redox energy storage system 7A each comprises a magnet 26 designed as an electromagnet. Alternatively, the magnet 26 can be designed as a permanent magnet. As can be seen from Figure 3, the magnetic device 24 of the individual magnetohydrodynamic pump modules 20 in the illustrated first embodiment of the redox energy storage system 7A each comprises a magnet 26 designed as an electromagnet. Alternatively, the magnet 26 can be designed as a permanent magnet. Fig. As can be seen further in Figure 3, the length of the two electrodes 22A, 22B of the electrode device 22 corresponds to the height of the magnet 26 of the magnet device. This prevents eddy currents which could restrict the volume flow of the electrolyte 5.

[0027] As from Fig. 4 and Fig. As can be seen further in Figure 5, the three redox flow cells 8 in a second embodiment of the redox energy storage device 7B have a rectangular shape, analogous to the first embodiment. In contrast to the first embodiment, the three redox flow cells 8 each have a reaction membrane 8.1 and a common magnetic device 24 and are arranged in a row one above the other in the transverse direction shown in the illustration. As can be seen from Figure 5, the three redox flow cells 8 have a rectangular shape. Fig. As can be seen further in Figure 4, the first three electrodes 8.3 of the negative half-cells 8B of the three redox flow cells 8 are each electrically connected to a first power switching unit 7.3 on the right in the diagram. The three second electrodes 8.2 of the positive half-cells 8A of the three redox flow cells 8 are each electrically connected to a second power switching unit 7.3 on the left in the diagram. Should one of the reaction membranes 8.1 be defective, the magnetohydrodynamic pump modules 20 in the half-cells 8A, 8B of the corresponding redox flow cell 8 can be deactivated. This closes the membrane valves of the half-cells 8A, 8B of the corresponding redox flow cell 8, and the defective reaction membrane 8.1 is disconnected from the volume flow of the electrolytes 5A, 5B.

[0028] As from Fig. 4 and Fig. As can be seen further in Figure 5, the electrode devices 22 of the individual magnetohydrodynamic pump modules 20 in the illustrated second embodiment of the redox energy storage device 7B each comprise two electrodes 22A, 22B. A first electrode 22A, which is electrically connected to the evaluation and control unit 12 via a control unit 7.2, introduces an electric current with a predetermined current density into the electrically conductive electrolyte 5 in the corresponding half-cell 8A, 8B. A second electrode 22B, which is electrically connected to the evaluation and control unit 12 via the control unit 7.2, conducts the electric current out of the electrically conductive electrolyte 5 in the corresponding half-cell 8A, 8B. The two electrodes 22A, 22B of the electrode devices 22 of the magnetohydrodynamic pump modules 20 are positioned such that the electric current flows perpendicular to the generated magnetic field.

[0029] As from Fig. 4 and Fig. As can be seen further in Figure 5, the length of the two electrodes 22A, 22B of the electrode device 22 corresponds to the width of the magnet 26 of the magnet device. This prevents eddy currents which could restrict the volume flow of the electrolyte 5.

[0030] As from Fig.As can be seen further in Figure 4, the common magnetic device 24 of the three magnetohydrodynamic pump modules 20 in the illustrated second embodiment of the redox energy storage device 7B comprises a magnet 26 designed as an electromagnet. Alternatively, the magnet 26 can be designed as a permanent magnet. In the illustrated second embodiment of the redox energy storage device 7B, the magnet 26 of the common magnetic device 24 covers all redox flow cells 8. In an alternative embodiment not shown, in particular in a multilayer embodiment of the redox energy storage device 7, the magnetic device 24 can comprise several magnets 26. The magnets 26 each cover a group of at least two redox flow cells 8 and have a gap between two groups of redox flow cells 8 that extends through a reaction membrane 8.1. This prevents an opening in the reaction membrane 8.1 must be introduced, which the magnet 26 of the common magnetic device penetrates.

[0031] In the illustrated embodiments of the redox energy storage device 7, the evaluation and control unit 12 is further configured to generate the electrical current for the electrode devices 22 of the magnetohydrodynamic pump modules 20 during a discharge process from the electrical current of the redox energy storage device 7, or during a charging process from an external energy source (not shown) connected to a positive terminal (+) and a negative terminal (-) of the electrical interface 9 of the redox energy storage device 7A. The evaluation and control unit 12 transmits the electrical current to the electrode devices 22 of the magnetohydrodynamic pump modules 20 via the at least one control unit 7.2.

[0032] In the illustrated embodiments of the redox energy storage system 7, the evaluation and control unit 12 is further designed to allow the flow velocity in the individual redox flow cells 8 and the resulting output power of each redox flow cell 8 to be individually adjusted via at least one control unit 7.2 and the corresponding magnetohydrodynamic pump modules 20. The evaluation and control unit 12 is further designed to allow the output power of the individual redox flow cells 8 to be combined into a total output power of the redox energy storage system 7 via at least one power switching unit 7.3 by means of parallel and / or series connection.

[0033] In the illustrated embodiments of the redox energy storage device 7, the electrodes 22A, 22B of the electrode assemblies 22 of the magnetohydrodynamic pump modules 20 are each designed as separate components. In alternative embodiments not shown, one of the electrodes 8.2, 8.3 of the individual redox flow cells 8 can simultaneously be used as one of the first electrodes 22A, 22B of the electrode assemblies 22. Furthermore, the reaction membranes 8.1 of the individual redox flow cells 8 can be coated section by section, thereby forming a contact surface as the second of the electrodes 22A, 22B of the electrode assemblies 22 of the corresponding magnetohydrodynamic pump module 20. In addition, the magnets 26 of the magnet assemblies 24 of the corresponding magnetohydrodynamic pump modules 20 are enlarged accordingly.

[0034] In the illustrated embodiments of the redox energy storage device 7, the at least one control unit 7.2 and the at least one power switching unit 7.3 are integrated into the redox energy storage device 7 or arranged within the housing 7.1 of the redox energy storage device 7. In alternative embodiments of the redox energy storage device 7 not shown, either the at least one control unit 7.2 or the at least one power switching unit 7.3 or the at least one control unit 7.2 and the at least one power switching unit 7.3 are arranged outside the redox energy storage device 7.

[0035] In further alternative embodiments of the redox energy storage device 7 not shown, the rectangular redox flow cells 8 described above can be arranged in at least two layers within the redox energy storage device 7. For example, three or more rectangular redox flow cells 8 can be arranged parallel to each other or parallel to each other in two to ten layers.

[0036] In another embodiment of the redox energy storage device 7 (not shown), the multiple redox flow cells 8 are honeycomb-shaped and form a honeycomb structure. With such a honeycomb structure, the honeycomb-shaped redox flow cells 8 can also be arranged in multiple layers of the redox energy storage device 7.

[0037] In an alternative embodiment of the energy storage arrangement 1 (not shown), at least one fluid channel of the at least two channel systems 4 is thermally coupled to at least one electrical component of the energy storage arrangement 1, so that the electrically conductive electrolyte 5 can absorb and transport waste heat from the electrical component. For example, the evaluation and control unit 12 and / or the at least one control unit 7.2 and / or the at least one power switching unit 7.3 can be thermally coupled to the at least one fluid channel.

[0038] In contrast to the embodiments described so far, alternative embodiments can include more or fewer redox flow cells, so that the performance of the redox energy storage system can be adapted to the required demand.

Claims

[1] Energy storage arrangement (1) with a redox energy storage device (7) comprising several redox flow cells (8) and connected via at least two channel systems (4) to at least two electrolyte containers (3) in each of which an electrically conductive electrolyte (5) is stored, and an MHD module (10) comprising at least one evaluation and control unit (12) and at least two magnetohydrodynamic pump modules (20) integrated into each of the individual redox flow cells (8), wherein the at least one evaluation and control unit (12) is configured to control the magnetohydrodynamic pump modules (20) via at least one control unit (7.2), wherein the at least two magnetohydrodynamic pump modules (20) each comprise at least one magnet device (24) and one electrode device (22) which is configured to control one of the magnets via the at least one control unit (7.2).2) to conduct the supplied electric current within the corresponding redox flow cell (8) through the corresponding electrically conductive electrolyte (5), so that, through interaction with a magnetic field generated by the at least one magnetic device (24), a Lorentz force is created which selectively accelerates the electrically conductive electrolyte (5) within the corresponding redox flow cell (8), so that a resulting pressure build-up causes a desired volume flow of the electrically conductive electrolyte (5) through the corresponding channel system (4) and the redox energy storage (7). [2] Energy storage arrangement (1) according to claim 1, characterized by, that in each of the individual redox flow cells (8) a first magnetohydrodynamic pump module (20A) is integrated into a positive half-cell (8A) of the corresponding redox flow cell (8), and a second magnetohydrodynamic pump module (20B) is integrated into a negative half-cell (8B) of the corresponding redox flow cell (8). [3] Energy storage arrangement (1) according to claim 1 or 2, characterized by , that the at least one evaluation and control unit (12) is further designed to generate the electric current for the electrode devices (22) of the magnetohydrodynamic pump modules (20) from the electric current of the redox energy storage (7) or from an external energy source and to transmit it to the magnetohydrodynamic pump modules (20) via the at least one control unit (7.3). [4] Energy storage arrangement (1) according to any one of claims 1 to 3, characterized by, that the at least one evaluation and control unit (12) is further designed to individually adjust the flow velocity in the individual redox flow cells (8) and the resulting output power of the individual redox flow cells (8) via the at least one control unit (7.2) and the corresponding magnetohydrodynamic pump modules (20). [5] Energy storage arrangement (1) according to any one of claims 1 to 4, characterized by , that the at least one evaluation and control unit (12) is further designed to combine the output power of the individual redox flow cells (8) by means of parallel connection and / or series connection to a total output power of the redox energy storage device (7) via at least one power switching unit (7.3). [6] Energy storage arrangement (1) according to any one of claims 1 to 5, characterized by, that the electrode devices (22) each comprise two electrodes (22A, 22B), of which a first electrode (22A) introduces an electric current flow with a predetermined current density within the corresponding redox flow cell (8) into the corresponding electrically conductive electrolyte (5) and a second electrode (22B) directs the electric current flow within the corresponding redox flow cell (8) out of the electrically conductive electrolyte (5). [7] Energy storage arrangement (1) according to claim 6, characterized by , that the two electrodes (22A, 22B) of the individual electrode devices (22) are positioned such that the electric current flow is perpendicular to the generated magnetic field. [8] Energy storage arrangement (1) according to any one of claims 1 to 7, characterized by , that at least two magnetohydrodynamic pump modules (20) have a common magnet device (24). [9] Energy storage arrangement (1) according to any one of claims 1 to 8, characterized by , that at least two redox flow cells (8) have a common reaction membrane (8.1). [10] Energy storage arrangement (1) according to any one of claims 1 to 9, characterized by , that the at least one magnetic device (24) comprises at least one magnet (26) which is designed as a permanent magnet or as an electromagnet. [11] Energy storage arrangement (1) according to any one of claims 1 to 10, characterized by that the multiple redox flow cells (8) are rectangular and arranged parallel to each other or parallel offset from each other. [12] Energy storage arrangement (1) according to any one of claims 1 to 10, characterized by , that the multiple redox flow cells (8) are honeycomb-shaped and form a honeycomb structure. [13] Energy storage arrangement (1) according to any one of claims 1 to 12, characterized bythat the redox flow cells (8) are arranged in at least two layers in the redox energy storage (7). [14] Energy storage arrangement (1) according to any one of claims 1 to 13, characterized by , that the at least one control unit (7.2) is arranged outside the redox energy storage device (7) or is integrated into the redox energy storage device (7). [15] Energy storage arrangement (1) according to any one of claims 1 to 14, characterized by that the at least one power switching unit (7.3) is arranged outside the redox energy storage unit (7) or is integrated into the redox energy storage unit (7). [16] Energy storage arrangement (1) according to any one of claims 1 to 15, characterized by , that at least one fluid channel of the at least two channel systems (4) is thermally coupled to at least one electrical component of the energy storage arrangement (1), so that the electrically conductive electrolyte (5) absorbs waste heat from the electrical component and transports it onward. [17] Energy storage arrangement (1) according to claim 16, characterized by , that the at least one electrical component of the energy storage arrangement (1) is the at least one evaluation and control unit (12) and / or the at least one control unit (7.2) and / or the at least one power switching unit (7.3).

Images