Cell-stack system for a fuel-cell system

Abstract

The present invention relates to a cell-stack system (100) for a fuel-cell system (102), comprising a number of cell stacks (110), which are arranged in at least one cell-stack unit (20), wherein each cell stack (110) has an anode portion and a cathode portion, comprising a pipe system (50), which runs in a longitudinal direction (52) and is intended for conducting anode feed gas (AZG) and cathode feed gas (KZG) to the cell stacks (110) and for conducting anode off gas (AAG) and cathode off gas (KAG) away from the cell stacks (110), and comprising a manifold system (10) for each cell stack (110), wherein each manifold system (10) connects the anode portion and the cathode portion of the corresponding cell stack (110) to the pipe system (50) for fluid communication, and wherein each manifold system (10) has an anode feed portion (122) for feeding the anode feed gas (AZT) from an anode feed pipe (62) of the pipe system (50), an anode discharge portion (124) for discharging the anode off gas (AAG) to an anode discharge pipe (66) of the pipe system (50), a cathode feed portion (132) for feeding the cathode feed gas (KZG) from a cathode feed pipe (64) of the pipe system (50), and a cathode discharge portion (134) for discharging the cathode off gas (KAG) to a cathode discharge pipe (68) of the pipe system (50).

Description

[0001] Cell stack system for a fuel cell system

[0002] The present invention relates to a cell stack system for a fuel cell system, and in particular to a cell stack system in which cell stacks are fluidly connected to a longitudinally extending pipe system. Furthermore, the present invention relates to an arrangement comprising a plurality of cell stack systems.

[0003] Cell stack systems for fuel cell systems are known in the prior art. Such cell stack systems comprise multiple cell stacks. The cell stacks are fluidically connected directly to a distribution station to conduct the anode feed gas and the cathode feed gas to the cell stacks and to discharge the anode exhaust gas and the cathode exhaust gas from the cell stacks. This results in a technically complex piping system. Additional piping is required for each additional cell stack in the cell stack system.

[0004] Against this background, one object of the present invention is to at least partially remedy the disadvantages described above. In particular, the object of the present invention is to design a cell stack system in such a way that scaling of the cell stack system by increasing the number of cell stacks is possible in a cost-effective and technically simple manner.

[0005] The above object is achieved by a cell stack system having the features of claim 1 and by an arrangement having the features of claim 15. Further features and details of the invention emerge from the subclaims, the description, and the drawings. Features and details described in connection with the cell stack system according to the invention naturally also apply in connection with the arrangement according to the invention, and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is always made to each other.

[0006] Accordingly, a cell stack system for a fuel cell system is provided. The cell stack system comprises a plurality of cell stacks, a piping system, and a manifold system per cell stack. The cell stacks are arranged in at least one cell stack unit, each cell stack having an anode section and a cathode section. The piping system for supplying anode feed gas and cathode feed gas to the cell stacks and for discharging anode exhaust gas and cathode exhaust gas from the cell stacks extends in a longitudinal direction. Each manifold system fluidly connects the anode section and the cathode section of the corresponding cell stack to the piping system.Furthermore, each distribution system has an anode supply section for supplying the anode supply gas from an anode supply pipe of the pipe system, an anode discharge section for discharging the anode exhaust gas to an anode discharge pipe of the pipe system, a cathode supply section for supplying the cathode supply gas from a cathode supply pipe of the pipe system, and a cathode discharge section for discharging the cathode exhaust gas to a cathode discharge pipe of the pipe system.

[0007] Because the piping system runs longitudinally, the cell stack system can be easily expanded in terms of the number of cell stacks or cell stack units. With such scaling in the number of cell stacks or cell stack units, similar or identical distribution systems can be used for each cell stack. Scaling the cell stack system is therefore technically simple and cost-effective. No additional piping is required to scale the cell stack system.

[0008] A "pipe system running in a longitudinal direction" means that the pipe system preferably extends in a straight line. Alternatively, the longitudinal direction can also have one or more bends.

[0009] In the present application, a fuel cell system is understood to mean a system (e.g., SOFC: Solid Oxide Fuel Cell) that has fuel cells for generating electrical energy using a fuel, or a system (e.g., SOEC: Solid Oxide Electrolyzer Cell) that has electrolysis cells for generating a fuel using electrical energy. A cell stack therefore comprises multiple fuel cells or multiple electrolysis cells.

[0010] The anode section of the cell stack supplies all cells (fuel cells or electrolysis cells) with anode feed gas and removes anode exhaust gas from all cells (fuel cells or electrolysis cells). The cathode section of the cell stack supplies all cells (fuel cells or electrolysis cells) with cathode feed gas and removes cathode exhaust gas from all cells (fuel cells or electrolysis cells).

[0011] According to one embodiment of the cell stack system, the pipe system has at least four, in particular five, pipes, each with a pipe axis. Two pipe axes run in a first plane, and two further, in particular three further, pipe axes run in a second plane, which is spaced from the first plane. Advantageously, the pipes can be arranged in two planes. This allows space to be saved in the direction of the planes perpendicular to the longitudinal direction of the pipe system if not all pipes run side by side in one plane. In particular, the two planes can be parallel or substantially parallel to one another.

[0012] According to a further embodiment of the cell stack system, two anode feed tubes or two cathode feed tubes extend with their tube axes in the second plane. By having two similar tubes extend in one plane, it is possible to achieve a short length for the corresponding sections, i.e., the anode feed section or cathode feed section, of the distribution systems. With cell stacks arranged not only longitudinally one behind the other but also longitudinally side by side, an anode feed tube or a cathode feed tube can always extend in the immediate vicinity of the cell stack.

[0013] According to a further embodiment of the cell stack system, the second level extends between the first level and the cell stacks. Advantageously, three pipes in the second level are arranged closer to the cell stacks than two further pipes in the first level. In this way, the corresponding sections, i.e., the anode discharge section and the cathode discharge section, of the distribution systems can be routed between the pipes in the second level to reach the cell stacks. Overall, this results in a compact arrangement of the longitudinally extending pipe system and the distribution systems for each cell stack.

[0014] According to another embodiment of the cell stack system, supply pipes have a smaller diameter than discharge pipes. Because the discharge pipes have a particularly large diameter, a high fluid flow through the discharge pipes can be ensured.

[0015] According to a further embodiment of the cell stack system, the cell stack system has a plurality of cell stack units. Each cell stack unit comprises two, three, four, five, or six cell stacks. The cell stack units can all be designed identically or very similarly to one another. In this way, the cell stack system can be scaled quickly and technically easily by always using identical or very similar cell stack units. In principle, each cell stack unit can have between 1 and 10 cell stacks, preferably between 1 and 8 cell stacks, and even more preferably between 1 and 6 cell stacks. In principle, 3, 6, 9, 18, or twice these (i.e., 6, 12, 18, 36) cell stacks can also advantageously be provided.

[0016] According to a further embodiment of the cell stack system, the cell stacks are arranged in two rows, with each row extending along or substantially along the longitudinal direction of the pipe system. By providing two rows, two cell stacks are always arranged next to each other in the longitudinal direction. In this way, the cell stack system remains technically easily scalable, and the fluid-communicating connection between the pipe system and the individual cell stacks by means of the corresponding distribution systems can be easily implemented with short sections. Furthermore, all cell stacks in a row can be arranged parallel to one another. Thus, the distribution systems of the cell stacks in this row can also be identical or very similar.

[0017] According to a further embodiment of the cell stack system, the cell stacks in the two rows are arranged offset from one another along the longitudinal direction. The offset in the longitudinal direction can be 0% to 100% of the cell stack width in the longitudinal direction. Preferably, the offset in the longitudinal direction is 20% to 70% of the cell stack width in the longitudinal direction, and even more preferably, the offset in the longitudinal direction is 40% to 60% of the cell stack width in the longitudinal direction. The offset increases the space for the distribution systems. The design freedom when connecting the cell stacks to the piping system using the distribution systems is increased by the offset. According to a further embodiment of the cell stack system, the cell stack units have an even or odd number of cell stacks in a first row and an even or odd number of cell stacks in a second row.The cell stack units can have an even number of cell stacks in the first row, such as 2, 4, 6, etc., and an even number of cell stacks in the second row, such as 2, 4, 6, etc., or an odd number of cell stacks, such as 1, 3, 5, etc. Furthermore, the cell stack units can have an odd number of cell stacks in the first row, such as 1, 3, 5, etc., and an even number of cell stacks in the second row, such as 2, 4, 6, etc., or an odd number of cell stacks, such as 1, 3, 5, etc. The smallest cell stack unit results from a cell stack in the first row and a cell stack in the second row if both rows have an odd number of cell stacks.Alternatively, the smallest cell stacking unit is two cell stacks in the first row and two cell stacks in the second row if both rows have an even number of cell stacks. Or, the smallest cell stacking unit is one or two cell stacks in the first row and two or one cell stack in the second row if one row has an even number of cell stacks and the other row has an odd number of cell stacks.

[0018] According to a further embodiment of the cell stack system, cell stack units having an even number of cell stacks in one of the two rows and an odd number of cell stacks in the other of the two rows are arranged such that, in the longitudinal direction, consecutive cell stack units in each of the two rows alternately have the even number and the odd number of cell stacks. Advantageously, the cell stack units are arranged such that, if possible, the same number of cell stacks is present in both rows.

[0019] According to a further embodiment of the cell stack system, each cell stack unit has a bearing device, in particular in the form of a bearing plate, to which the cell stacks of the cell stack unit are mechanically connected. In particular, the cell stacks are held by the bearing device. In this way, the storage of the cell stacks can be separated from the pipe system and the distribution systems. The pipe system and the distribution systems do not need to be designed for mechanically supporting the cell stacks.

[0020] The bearing device can, in turn, be movably supported by a housing or frame. Different thermal expansion of the pipe system can then be compensated for by the movable bearing device. The bearing device can be movably supported by the housing or frame, for example, by using rollers on which the bearing device can roll. Alternatively, the bearing device can also slide on the housing or frame.

[0021] According to a further embodiment of the cell stack system, the bearing device, in particular the bearing plate, comprises a holding unit per cell stack and a connecting unit that mechanically connects the holding units. Advantageously, the bearing device with this structure can be manufactured in a technically simple manner.

[0022] According to a further embodiment of the cell stacking system, the bearing device, in particular the bearing plate, consisting of the holding units and the connecting unit, is formed as a single piece. The single-piece design of the bearing device results in a mechanically particularly stable bearing device. Designing the bearing device as a bearing plate is a technically particularly simple solution.

[0023] According to a further embodiment of the cell stacking system, the cell stacking system comprises a rail system for holding the bearing device, in particular the bearing plate, wherein the bearing device is movable in the longitudinal direction relative to the rail system. The bearing device is movably mounted by means of the rail system. Consequently, thermally induced differential expansion of the pipe system can be compensated.

[0024] Furthermore, an arrangement is provided. The arrangement comprises several cell stack systems. In the arrangement, two cell stack systems are always connected to a pipe system via their distribution systems in a fluid-communicating manner. The pipe systems are connected to at least one distribution station in a fluid-communicating manner. The purpose of the arrangement is to combine the cell stack systems into an even larger unit.

[0025] In this arrangement, two cell stack systems are always connected to a common piping system. These common piping systems converge at one or more distribution stations. The distribution stations thus consolidate the inflows to the cell stack systems and the outflows from the cell stack systems.

[0026] Further advantages, features, and details of the invention will become apparent from the following description, in which exemplary embodiments are described in detail with reference to the drawings. They show:

[0027] Fig. 1 is a perspective view of a first embodiment of a cell stack system;

[0028] Fig. 2 is a perspective view of another embodiment of a cell stack system;

[0029] Fig. 3 is a sectional view of a cell stack system;

[0030] Fig. 4 is a perspective view of another embodiment of a cell stack system;

[0031] Fig. 5 is a perspective view of another embodiment of a cell stack system;

[0032] Fig. 6 is a perspective view of another embodiment of a cell stack system;

[0033] Fig. 7 is a perspective view of another embodiment of a cell stack system;

[0034] Fig. 8 is a schematic view of storage devices on a rail system;

[0035] Fig. 9 is a perspective view of a fuel cell system;

[0036] Fig. 10 is a perspective view of another embodiment of a cell stack system; Fig. 11 is a perspective view of a first embodiment of an arrangement; and

[0037] Fig. 12 is a perspective view of another embodiment of an arrangement.

[0038] Fig. 1 shows a perspective view of a first embodiment of a cell stack system 100. The cell stack system 100 has three cell stacks 110 arranged as a cell stack unit 20. Each cell stack 110 has an anode section and a cathode section. The cell stack system 100 further comprises a pipe system 50 extending in a longitudinal direction 52. The longitudinal direction 52 can run along a straight line. Alternatively, the longitudinal direction can also have one or more bends. The anode section and the cathode section of each cell stack 110 are fluidly connected to the pipe system 50 via a respective distributor system 10 per cell stack 110.

[0039] The pipe system 50 has five pipes 54, which extend with their pipe axes 56 in the longitudinal direction 52. The pipe system 50 comprises two cathode supply pipes 64 for supplying the cathode supply gas KZG, one anode supply pipe 62 for supplying the anode supply gas AZG, one cathode discharge pipe 68 for discharging the cathode exhaust gas KAG, and one anode discharge pipe 66 for discharging the anode exhaust gas AAG. Alternatively, the pipe system can also have four, six, seven, or eight pipes 54. In particular, it is also possible for the pipe system to have two anode supply pipes 62 and one cathode supply pipe 64.

[0040] The cell stacks 110 are arranged in two rows 40, 42. The rows 40, 42 extend in the longitudinal direction 52. One cell stack 110 is arranged in the first row 40, and two cell stacks 110 are arranged in the second row 42.

[0041] Fig. 2 shows a perspective view of another embodiment of a cell stack system 100. The cell stack system 100 comprises a plurality of cell stacks 110. The supply pipes 62, 64 can have a smaller diameter 70 than the discharge pipes 66, 68. The large diameter of the discharge pipes 66, 68 allows the exhaust gas to be discharged particularly effectively. Alternatively, the supply pipes 62, 64 can have a larger diameter 70 than the discharge pipes 66, 68. Fig. 3 shows a sectional view through a cell stack system 100, as shown, for example, in Figs. 1, 2, 4, 5, 6, 7, and 10. As shown in Fig. 3, each distribution system 10 connects the anode section and the cathode section of the corresponding cell stack 110 in fluid communication with the pipe system 50.Each distribution system 10 has an anode feed section 122 for feeding the anode feed gas AZG from an anode feed pipe 62 of the pipe system 50, an anode discharge section 124 for discharging the anode exhaust gas AAG to an anode discharge pipe 66 of the pipe system 50, a cathode feed section 132 for feeding the cathode feed gas KZG from a cathode feed pipe 64 of the pipe system 50 and a cathode discharge section 134 for discharging the cathode exhaust gas KAG to a cathode discharge pipe 68 of the pipe system 50.

[0042] The tube axes 56 of the tubes 54 extend in two planes 58, 60. The tube axis 56 of the anode discharge tube 66 and the tube axis 56 of the cathode discharge tube 68 extend in a first plane 58. The tube axes 56 of the two cathode supply tubes 64 and the tube axis 56 of the anode supply tube 62 extend in a second plane 60. The two planes 58, 60 are spaced apart from each other. Furthermore, the second plane 60 extends between the first plane 58 and the cell stacks 110.

[0043] Fig. 4 shows a perspective view of another embodiment of a cell stack system 100. The cell stack system 100 has two cell stack units 20, each with three cell stacks 110. Because the pipe system 50 extends in the longitudinal direction 52, the cell stack system 100 can easily increase the number of cell stacks 110. The distribution systems can be used to fluidly connect the cell stacks 110 to the pipe system 50. However, new pipes 54 are not required if the number of cell stacks 110 is increased.

[0044] Figures 5, 6, 7 and 10 show further perspective views of further embodiments of a cell stack system 100. In Fig. 5, the cell stack system 100 has a cell stack unit 20 with four cell stacks 110. Alternatively, the cell stack system 100 could also have two cell stack units 20, each with two cell stacks 110. Fig. 6 shows a cell stack system 100 with ten cell stacks 110. The cell stacks 110 can be arranged, for example, in five cell stack units 20, each with two cell stacks 110, or in three cell stack units 20, each with three cell stacks 110 and an extra cell stack 110.

[0045] For example, each cell stack 110 can generate 10 kW of power. Accordingly, the cell stack system 100 shown in Fig. 5 can generate 40 kW of power, the cell stack system 100 shown in Fig. 6 can generate 100 kW of power, the cell stack system 100 shown in Fig. 7 can generate 90 kW of power, and the cell stack system 100 shown in Fig. 10 can generate 180 kW of power.

[0046] Fig. 7 relates to a cell stack system 100 with nine cell stacks 110. Four cell stacks 110 are arranged in the first row 40 and five cell stacks 110 are arranged in the second row 42. Each row 40, 42 extends along or substantially along the longitudinal direction 52 of the pipe system 50. The cell stack units 20 each have three cell stacks 110.

[0047] The first cell stack unit 20, which is arranged on the left in Fig. 7, has two cell stacks 110 in the second row 42 and one cell stack 110 in the first row 40. The middle cell stack unit 20 has two cell stacks 110 in the first row 40 and one cell stack 110 in the second row 42. Furthermore, the third cell stack unit 20, which is arranged on the right in Fig. 7, has two cell stacks 110 in the second row 42 and one cell stack 110 in the first row 40. Because in the longitudinal direction 52 successive cell stack units 20 in each of the two rows 40, 42 alternately have the even number and the odd number of cell stacks 110, it is achieved that the number of cell stacks 110 in both rows 40, 42 remains the same except for one cell stack 110.

[0048] The cell stacks 110 can be arranged offset from one another in the two rows 40, 42 along the longitudinal direction 52, as shown, for example, in Fig. 7. The greater this offset, the more space is available for the individual distribution systems 10 per cell stack 110 in the fluid-communicating connection to the pipe system 50.

[0049] Fig. 8 shows a schematic view of storage devices 30 on a rail system 80. The cell stack units 20 shown in Fig. 7 can each have a storage device 30 shown in Fig. 8. Each storage device 30 can be mechanically connected to the cell stacks 110 of the respective cell stack unit 20.

[0050] The bearing devices 30 shown in Fig. 8 are designed as bearing plates 36. Each bearing plate 36 comprises one holding unit 32 per cell stack 110, i.e., three holding units 32, and a connecting unit 34 that mechanically connects the holding units 32. In particular, the bearing plates 36 can be formed as a single piece.

[0051] The cell stack system 100 shown in Fig. 7 can have the rail system 80 shown in Fig. 8. The bearing plates 36 can be held by means of the rail system 80. The bearing plates 36 are movable in the longitudinal direction 52 relative to the rail system 80. In particular, the bearing plates 36 can slide on the rail system 80. The bearing plates 36 and the rail system 80 can separate the mechanical support of the cell stacks 110 from the fluid supply to the cell stacks 110. Furthermore, a thermally induced change in length of the pipe system 50 can be compensated for by means of the movable support of the cell stack units 20.

[0052] Fig. 9 shows a fuel cell system 102. A cell stack system 100, such as that shown in Figs. 1, 2, 4, 5, 6, 7, and 10, can be arranged in the housing of the fuel cell system 102. Only the pipe system 50 of the cell stack system 100 is visible in Fig. 9.

[0053] Fig. 11 shows a perspective view of a first embodiment of an arrangement 200. The arrangement 200 comprises a plurality of cell stack systems 100. Two cell stack systems 100 are always connected to a common pipe system 50 via their distribution systems 10 in a fluid-communicating manner. All four pipe systems 50 shown are connected to a distribution station 210 in a fluid-communicating manner. This arrangement is also referred to as "multi-level cross" because, here, several layers of cell stacks 110 are connected to a distribution station 210 and fluid pipe axes are arranged one above the other, each sharing a common pipe system 50. This configuration is particularly advantageous for uniform distribution and optimal pressure loss. Fig. 12 shows a perspective view of another embodiment of an arrangement 200.In this arrangement 200, two cell stack systems 100 are also connected to a common pipe system 50 via their distribution systems 10, enabling fluid communication. Furthermore, two pipe systems 50 are connected to a distribution station 210, enabling fluid communication, and two further pipe systems 50 are also connected to a distribution station 210, enabling fluid communication. Furthermore, the two distribution stations 210 are connected to each other via fluid communication. This arrangement 200 is optimal for space utilization and therefore has a very good KW7m. 2 Footprint.

[0054] List of reference symbols

[0055] 10 Distribution system

[0056] 20 cell stack unit

[0057] 30 storage device

[0058] 32 Holding unit

[0059] 34 Connection unit

[0060] 36 bearing plate

[0061] 40 first row

[0062] 42 second row

[0063] 50 pipe system

[0064] 52 Longitudinal direction

[0065] 54 pipe

[0066] 56 Pipe axis

[0067] 62 Anode feed pipe

[0068] 64 Cathode feed tube

[0069] 66 Anode discharge pipe

[0070] 68 Cathode discharge tube

[0071] 70 diameter

[0072] 80 rail system

[0073] 100 cell stack system

[0074] 102 Fuel cell system

[0075] 110 cell stacks

[0076] 122 Anode feed section

[0077] 124 Anode discharge section

[0078] 132 Cathode feed section

[0079] 134 Cathode discharge section

[0080] 200 arrangement

[0081] 210 distribution station

[0082] AZG anode feed gas

[0083] AAG anode exhaust gas

[0084] KZG cathode feed gas

[0085] KAG Kathodenabgas

Claims

Patent claims 1. Cell stack system (100) for a fuel cell system (102), comprising a plurality of cell stacks (110) arranged in at least one cell stack unit (20), each cell stack (110) having an anode section and a cathode section, characterized by a pipe system (50) extending in a longitudinal direction (52) for supplying anode feed gas (AZG) and cathode feed gas (KZG) to the cell stacks (110) and for discharging anode exhaust gas (AAG) and cathode exhaust gas (KAG) from the cell stacks (110), and a distribution system (10) per cell stack (110), each distribution system (10) fluidly connecting the anode section and the cathode section of the corresponding cell stack (110) to the pipe system (50), and each distribution system (10) having an anode feed section (122) for supplying the Anode feed gas (AZG) from an anode feed pipe (62) of the pipe system (50),an anode discharge section (124) for discharging the anode exhaust gas (AAG) to an anode discharge pipe (66) of the pipe system (50), a cathode feed section (132) for supplying the cathode feed gas (KZG) from a cathode feed pipe (64) of the pipe system (50), and a cathode discharge section (134) for discharging the cathode exhaust gas (KAG) to a cathode discharge pipe (68) of the pipe system (50).

2. Cell stack system (100) according to claim 1, characterized in that the pipe system (50) has at least four, in particular five pipes (54), each with a pipe axis (56), wherein two pipe axes (56) run in a first plane (58) and two further, in particular three further pipe axes (56) run in a second plane (60) which is spaced from the first plane (58).

3. Cell stack system (100) according to claim 2, characterized in that two anode feed tubes (62) or two cathode feed tubes (64) run with their tube axes (56) in the second plane (60).

4. Cell stack system (100) according to claim 2 or 3, characterized in that the second level (60) extends between the first level (58) and the cell stacks (110).

5. Cell stack system (100) according to claim 2 to 4, characterized in that supply pipes (62, 64) have a smaller diameter (70) than discharge pipes (66, 68).

6. Cell stack system (100) according to one of the preceding claims, characterized in that the cell stack system (100) has a plurality of cell stack units (20), and that each cell stack unit (20) comprises two, three, four, five or six cell stacks (110).

7. Cell stack system (100) according to one of the preceding claims, characterized in that the cell stacks (110) are arranged in two rows (40, 42), each row (40, 42) extending along or substantially along the longitudinal direction (52) of the pipe system (50).

8. Cell stack system (100) according to claim 7, characterized in that the cell stacks (110) in the two rows (40, 42) are arranged offset from one another along the longitudinal direction (52).

9. Cell stack system (100) according to claim 7 or 8, characterized in that the cell stack units (20) have an even or odd number of cell stacks (110) in a first row (40) and an even or odd number of cell stacks (110) in a second row (42).

10. Cell stack system (100) according to one of claims 7 to 9, characterized in that cell stack units (20) which have an even number of cell stacks (110) in one of the two rows (40, 42) and an odd number of cell stacks (110) in the other of the two rows (42, 40) are arranged such that in the longitudinal direction (52) successive cell stack units (20) in each of the two rows (40, 42) alternately have the even number and the odd number of cell stacks (110).

11. Cell stack system (100) according to one of the preceding claims, characterized in that each cell stack unit (20) has a Bearing device (30), in particular in the form of a bearing plate (36), to which the cell stacks (110) of the cell stack unit (20) are mechanically connected.

12. Cell stack system (100) according to claim 11, characterized in that the bearing device (30), in particular the bearing plate (36), has a holding unit (32) per cell stack (110) and a connecting unit (34) which mechanically connects the holding units (32).

13. Cell stack system (100) according to claim 12, characterized in that the bearing device (30), in particular the bearing plate (36), consisting of the holding units (32) and the connecting unit (34) is formed in one piece.

14. Cell stacking system (100) according to one of claims 11 to 13, characterized in that the cell stacking system (100) has a rail system (80) to hold the bearing device (30), in particular the bearing plate (36), wherein the bearing device (30) is movable in the longitudinal direction (52) relative to the rail system (80).

15. Arrangement (200) comprising a plurality of cell stack systems (100) according to one of the preceding claims, characterized in that two cell stack systems (100) are always connected to a pipe system (50) in a fluid-communicating manner by means of their distribution systems (10), and wherein the pipe systems (50) are connected to at least one distribution station (210) in a fluid-communicating manner.

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