Accumulator system

Abstract

Accumulator system with a plurality of accumulator modules (2), each comprising accumulator cells, and a cabinet unit (3) housing the accumulator modules (2), which provides a storage compartment (4) for each accumulator module (2), wherein the cabinet unit (3) comprises two cabinet elements (5, 6) combined by means of a common roof hood (7) and a common base section (8), wherein a cabinet element (5, 6) comprises a frame (17) made of several welded profile elements (18), which is subdivided into sections (26) arranged one above the other in the vertical direction (16) to form storage compartments (4), wherein a support plate (19) serving as the base plate of the associated storage compartment (4) for an accumulator module (2) is provided for each section (26).wherein the receiving compartments (4) provided by the sections (26) each have internal dimensions exceeding the external dimensions of an accumulator module (2) at least in the width direction (27) to form a gap space (23), characterized in that a front cover (12) is provided for each receiving compartment (4) and is arranged on the frame (17), which is double-walled, wherein the two walls (33, 34) are spaced apart from each other leaving a free space (37).

Description

[0001] The invention relates to a battery system with a plurality of battery modules, each comprising battery cells, and a cabinet unit housing the battery modules, which provides a receiving compartment for each battery module.

[0002] Accumulator systems of the type mentioned above are well known from the prior art, which is why a separate printed reference is not required here. Reference is therefore only made to WO 2019 / 105570 A1 as an example.

[0003] Other accumulator systems are known from DE 20 2020 101 218 U1, US 6 502 702 B1, DE 20 2019 105 570 U1 and US 2022 / 0 109 210 A1.

[0004] German patent application DE 20 2020 101 218 U1 discloses a battery system comprising a plurality of lithium-ion cell modules. The system includes a cabinet with several storage compartments and a front door.

[0005] US 6 502 702 B1 shows a shelving unit with several open compartments for holding battery modules.

[0006] DE 20 2019 105 570 U1 shows an open, shelf-like battery cabinet with several battery compartments.

[0007] US 2022 / 0 109 210 A1 also shows a shelf-like battery cabinet with multiple battery compartments and a removable front cover.

[0008] Previously known accumulator systems serve as stationary energy storage devices for the intermediate storage of electricity. They consist of accumulator modules on one side and a cabinet unit on the other, with the cabinet unit serving to house the accumulator modules. For this purpose, the cabinet unit has compartments, with one compartment provided for each accumulator module.

[0009] Each battery module contains multiple electrically interconnected battery cells. The battery modules themselves are also electrically interconnected, forming a complete battery, which can also be referred to as a large-scale battery.

[0010] Each battery system preferably also includes a control unit, which serves in particular to control the respective battery modules and / or cells during charging and / or discharging. The control unit, like the battery modules, is housed within the cabinet unit, thus creating a completely self-contained battery system.

[0011] In principle, it is possible to equip the cabinet unit of a battery system with battery modules of different cell technologies. For example, battery systems can be built based on lead-acid cells or on lithium-ion cells.

[0012] Depending on the cell technology used, the cabinet unit must meet specific requirements, particularly in the event of a failure, such as a fire. Therefore, the cabinet units of existing battery systems are specifically tailored to the cell technology used. This is considered a disadvantage because providing a cabinet unit tailored to the cell technology generates additional costs and also increases maintenance effort, as proper maintenance requires maintenance personnel to be familiar with the design features of a cabinet unit specifically designed for the cell technology used.

[0013] Therefore, starting from the aforementioned prior art, the object of the invention is to propose an accumulator system of the type mentioned at the outset which, with regard to its cabinet unit, makes it structurally possible to be used in a wider range of applications.

[0014] To solve this problem, the invention proposes an accumulator system with a plurality of accumulator modules, each comprising accumulator cells, and a cabinet unit housing the accumulator modules, which provides a receiving compartment for each accumulator module. The cabinet unit comprises two cabinet elements combined by means of a common roof hood and a common base section. One cabinet element has a frame made of several welded profile elements, which is subdivided into sections arranged one above the other in the vertical direction to form receiving compartments. Each section provides a support plate for an accumulator module, serving as the base plate of the associated receiving compartment. The receiving compartments provided by the sections each have internal dimensions that exceed the external dimensions of an accumulator module, at least in the width direction, to form a gap space.

[0015] The accumulator system according to the invention proposes a standardized cabinet unit. This unit can be used independently of the cell technology employed, thus allowing for the use of a consistently identical cabinet unit. This simplifies both manufacturing and maintenance, resulting in overall more cost-effective operation.

[0016] The cabinet unit provided according to the invention is designed to withstand emergency situations and can therefore also be referred to as a "fireproof cabinet" or "fireproof rack". Due to its design, the cabinet unit according to the invention can be used with different battery modules and / or different battery cells with respect to cell chemistry.

[0017] The cabinet unit according to the invention consists of two cabinet elements combined together. Looking towards the cabinet unit, a right-hand cabinet element and a left-hand cabinet element are provided, which can also be of identical construction.

[0018] The cabinet unit also features a roof vent and a base section, with the two cabinet elements being connected to each other by means of the roof vent on one side and the base section on the other. The roof vent and the base section are thus connected to the two cabinet elements.

[0019] Each cabinet unit has a frame formed from several welded profile elements. The frames of both cabinet units are preferably identical in design. These frames, constructed from welded profile elements, serve as a support structure and enable the secure and permanent mounting of even relatively heavy battery modules.

[0020] To accommodate multiple battery modules, the frame of a cabinet element is divided into individual sections arranged vertically. Each frame section serves as a separate compartment for holding one battery module.

[0021] Each frame section includes a support plate that serves as the base plate for the corresponding storage compartment. In normal use, the accumulator module housed in the respective storage compartment rests on this support plate. The support plate is preferably welded to the frame, which also contributes to a torsionally rigid and thus overall stable structure.

[0022] The receiving compartments provided by the frame are larger in terms of their receiving space than the external dimensions of the accumulator module received in the intended use. According to the invention, for this purpose, the receiving compartments provided by the sections each have internal dimensions that exceed the external dimensions of an accumulator module, at least in the width direction, in order to form a gap.

[0023] Depending on the cell chemistry used, this gap space, provided by the design, serves to accommodate insulating materials that are effective in the event of a breakdown.

[0024] According to the invention, each receiving compartment is provided with a front cover attached to the frame, which is double-walled, with the two walls spaced apart from each other, leaving a gap. This front cover is preferably removable and attached to the frame, for example by screws. Alternatively, a plug-in arrangement is also provided. An advantage of this design is that the cover can be easily removed, particularly for maintenance, and then reinstalled as intended after maintenance has been completed.

[0025] The cover has a double-walled design, meaning it has an outer skin on one side and an inner skin on the other. These two walls, serving as the inner and outer skins, are spaced apart from each other, thus creating a gap between them.

[0026] The design according to the invention thus proposes a standardized frame and therefore cabinet element construction that allows the available space to be used for insulating material tailored to the cell chemistry of the accumulator modules to be accommodated, depending on the type of cells. If insulating material is not used, or not used in this location, the space can also be left empty. As a result, the design according to the invention allows for individual configuration depending on the cell chemistry used. Therefore, the cabinet unit designed according to the invention can be used independently of cell chemistry, thus making it equally suitable for accumulator modules with different cell chemistry, in contrast to the prior art.

[0027] The gap provided by a cabinet element preferably extends not only in width but also in height. Insulation materials can therefore be provided both above and to the sides of an accumulator module. Depending on the cell chemistry used, different insulation materials can be employed. It is also possible, of course, to use a different insulation material on the sides of an accumulator module than on the top cover, in consideration of a potential failure. In this context, fire-resistant insulation materials, as well as water-absorbing or water-releasing textile materials, can be used.

[0028] As will be described in more detail below, the cabinet unit can also be equipped with air ducts that enable controlled cooling, particularly during intended use. In the event of a failure, these air ducts can be used to vent hot gases from inside the cabinet unit, thus helping to prevent fire from spreading from a failed battery module to an adjacent battery module.

[0029] The accumulator system can also be equipped with sensors, such as heat, smoke, and / or gas sensors, which are connected to the accumulator system's control unit via communication technology. In the event of detection, ventilation flaps can be controlled and / or warning signals perceptible to the user can be triggered.

[0030] According to an alternative design, the extra space in a receiving compartment compared to the accumulator module it houses can also be used to create an air space around the accumulator module. Under normal operating conditions, this air space can serve to cool the accumulator module, and in the event of a failure, it can be used for targeted degassing or smoke extraction. In this case, each receiving compartment is insulated by insulating materials applied externally, particularly to the side walls. For this purpose, the side walls of a receiving compartment are specially designed, as will be described in more detail below.

[0031] Overall, the inventive design provides a standardized cabinet unit for the cell-chemistry-independent storage of accumulator modules. Due to its design, a gap is provided between a storage compartment and the accumulator module held by that compartment. This gap can be individually filled with insulating material or left empty to allow for air space. In particular, if the gap is left empty, insulation is provided on the outside of the storage compartment. Both the external and / or internal insulation of the storage compartment can be selected and installed variably and individually, depending on the cell chemistry of the accumulator modules used.

[0032] According to a further feature of the invention, each receiving compartment is provided with a connecting plate arranged on the frame for connection to an accumulator module. This connecting plate serves to secure the position of the accumulator module within the corresponding receiving compartment. Preferably, it is screwed to the connecting plate, which is welded to the frame. This allows for disassembly, particularly for maintenance purposes, but also permits a secure position of the accumulator module within the receiving compartment, even if the gap surrounding the accumulator module according to the invention remains unobstructed.

[0033] According to a further feature of the invention, the gap space is provided to contain an insulating material, wherein a layer of insulating material is arranged within the receiving compartment on each side of the accumulator module.

[0034] According to this first alternative of the invention, the gap is filled with an insulating material. An insulating layer is used on each side of the accumulator, arranged within the receiving compartment, i.e., between the accumulator module and a side wall defining the receiving compartment. This insulating layer can be a textile fire-resistant material, but also a water reservoir and / or the like. Crucially, the insulating layer used helps prevent fire from spreading to an adjacent accumulator module in the event of a fire.

[0035] According to a further feature of the invention, a battery module is provided with a textile mat arranged in the receiving compartment on its upper side. This textile mat also serves as fire protection in the event of a failure. In particular, a water-binding textile mat can be used, which releases the bound water while generating heat. This serves both to extinguish fires and to cool the battery module.

[0036] For ventilation of the receiving compartment, both walls of the cover have openings. These are arranged in a staggered pattern, forming a labyrinthine guide. The space between the two walls acts as this guide. In the simplest case, the inner wall has lower openings, while the outer wall has upper openings. Particularly in the event of an accident, escaping hot gases or smoke are forced into a flow path diverted by the interposed space. This serves primarily to cool the air and also ensures that any entrained dirt and / or fire particles can be expelled and remain in the space between the two walls of the cover.

[0037] According to a further feature of the invention, it is provided that side walls are provided for each receiving compartment on the frame, each of which is designed in a shell-like manner and has a volume space open on one side towards the receiving compartment for receiving an insulating material.

[0038] The shell-shaped side walls according to the invention are received by the frame in the fully assembled state in such a way that they are surrounded by profile elements of the frame in the manner of a frame. For the secure positioning of the side walls on the frame, they can be screwed, riveted, or welded to the corresponding profile elements of the frame.

[0039] The trough-like design of the side walls creates a volumetric space in each side wall, which is flush with the outside of the frame. This volumetric space provided by a side wall can be used to accommodate insulation material, which is then positioned on the outside of the side wall.

[0040] Each compartment therefore has a side wall on both the left and right sides, designed to hold insulation material. To secure the insulation material held by the side walls of the compartments, additional side walls can be provided on both sides of a cabinet element – ​​a left side wall on the one hand and a right side wall on the other – which equally cover the open-sided volume spaces of the side walls of the individual compartments, filled with insulation material.

[0041] According to a further feature of the invention, the side walls have a spacer on their inner side facing the receiving compartment. In the fully assembled state, an accumulator module, as intended by a receiving compartment, rests between the spacers of the side walls that laterally delimit the receiving compartment. The spacers thus ensure additional positional security of the accumulator module in the associated receiving compartment.

[0042] According to a further feature of the invention, it is provided that each receiving compartment has a rear cover arranged on the frame, which is designed in a bowl-like shape and has a cover plate equipped with a through-opening.

[0043] The rear covers are also preferably shell-shaped. This allows for the optional integration of fire-resistant material. For cooling purposes, each cover has a plate equipped with perforations. This allows airflow through the front perforations, past the accumulator module laterally, and up to the perforations in the rear cover plate, or vice versa. The result is an air duct that provides air circulation for cooling the accumulators and, in the event of a failure, allows for the removal of exhaust gases or smoke.

[0044] According to a further feature of the invention, each cabinet element has a rear wall extending over all receiving compartments, which is spaced apart from the respective end panels of each receiving compartment. This creates a gap between the rear wall of a cabinet element and the individual rear covers of the receiving compartments. The rear wall is preferably equipped with through-openings, resulting in a rear labyrinth guide that offers the advantages already discussed with regard to the front labyrinth guide. The volumetric space between the covers on the receiving compartment side and the rear wall of the cabinet element can optionally be filled with insulating material.

[0045] According to a further feature of the invention, the cabinet unit has a common rear wall for both cabinet elements, which is spaced apart from the two cabinet elements to form an air duct. According to this proposal, a further rear wall is used, namely a cabinet unit rear wall. This is spaced apart from the two rear walls provided by the cabinet elements, thus forming an air duct between the rear wall of the cabinet unit and the rear walls of the cabinet elements. This air duct serves, in particular in the event of a malfunction, for the rearward discharge of hot gases, especially flue gases, upwards.

[0046] According to a further feature of the invention, the two frames of the cabinet elements are screwed together. This ensures both a secure stand and simplified assembly and disassembly.

[0047] According to a further feature of the invention, each cabinet element is provided with a drip tray arranged vertically below the lowest storage compartment. The drip trays are preferably slidably mounted on the frame and can be moved out of the frame so that they are accessible from above. The drip trays serve in particular to collect any condensation that may form and any electrolytes that may leak.

[0048] The invention further proposes a cabinet unit of the type described above. Such a cabinet unit offers the advantages already explained above. In particular, the invention provides that each storage compartment has a front-facing cover attached to the frame, which is double-walled, with the two walls spaced apart from each other, leaving a gap.

[0049] Further features and advantages of the invention will become apparent from the following description with reference to the figures. These show Fig. 1 in schematic perspective view an accumulator system according to the invention; Fig. 2 in a schematic front view the cabinet unit of the accumulator system according to the invention; Fig. 3 in a schematic side view the cabinet unit according to Fig. 2; Fig. 4 in schematic sectional view the cabinet unit according to Fig. 2 according to section line IV-IV; Fig. 5 in schematic view from below the cabinet unit after Fig. 2; Fig. 6 in schematic perspective view the accumulator system 1 according to the invention without side wall; Fig. 7 in schematic perspective view the accumulator system 1 according to the invention without side wall and with collection trays extended; Fig. 8 in schematic exploded view the accumulator system according to the invention; Fig. 9 in schematic perspective view the accumulator system according to the invention with partially removed front covers; Fig. 10 in schematic front view the accumulator system according to Fig. 9; Fig. 11 in a detailed view, section XI after Fig. 9; Fig. 12 in a detailed view, section XII after Fig. 10; Fig. 13 in schematic perspective view the left cabinet element of the cabinet unit according to the invention; Fig. 14 in schematic front view the cabinet element according to Fig. 13; Fig. 15 in a schematic side view the cabinet element according to Fig. 13; Fig. 16 in a schematic sectional view the cabinet element according to Fig. 15 according to section line XVI-XVI; Fig. 17 in schematic perspective view a right cabinet element; Fig. 18 in schematic perspective view a frame of a left cabinet element; Fig. 19 in schematic front view the frame according to Fig. 18; Fig. 20 in schematic side view the frame according to Fig. 18; Fig. 21 in cutaway view the frame after Fig. 20 according to section line XXI-XXI; Fig. 22 in schematic perspective view a frame of a cabinet element equipped with support plates; Fig. 23 in schematic front view the frame according to Fig. 22; Fig. 24 in schematic side view the frame according to Fig. 22; Fig. 25 in schematic front view a frame of a cabinet element fitted with front covers; Fig. 26 in schematic side view the cabinet element according to Fig. 25; Fig. 27 in a schematic detailed representation of section XXVII according to Fig. 26; Fig. 28 in a schematic detailed representation, section XXVIII after Fig. 26; Fig. 29 in schematic perspective view a front cover; Fig. 30 in a schematic front view the cover after Fig. 29 and Fig. 31 in schematic sectional view the cover 28 after Fig. 30 according to section line XXXI-XXXI

[0050] The Fig. Figures 1 to 31 show an accumulator system 1 according to the invention as well as individual components of the accumulator system 1 according to the invention in different views. The same reference numerals identify the same components.

[0051] As can be seen in particular from a review of the Fig. As 1 to 9 results, an accumulator system 1 according to the invention comprises a cabinet unit 3 and accumulator modules 2. The cabinet unit 3 serves to hold the accumulator modules 2, for which purpose the cabinet unit 3 provides a plurality of receiving compartments 4. Each receiving compartment 4 serves to hold one accumulator module 2.

[0052] In the illustrated embodiment, the cabinet unit 3 has a total of 12 storage compartments 4. Eleven of these storage compartments 4 serve to hold one accumulator module 2 each. Thus, the cabinet unit 3 houses eleven accumulator modules 2.

[0053] One of the twelve compartments 4 is used to house a control unit. This unit is in communication communication with the accumulator modules 2 or the accumulator cells provided by an accumulator module 2.

[0054] As can be seen in particular from the exploded view according to Fig. As 8 results, the cabinet unit 3 has two cabinet elements, namely a left cabinet element 5 and a right cabinet element 6. The two cabinet elements 5 and 6 are combined with each other via a common roof hood 7 on the one hand and a common base section 8 on the other.

[0055] As the representation according Fig. As can be seen from Figure 5, the foot section 8 has individual interconnected foot profile pieces 9. In the intended use, these serve to support the two cabinet elements 5 and 6. The foot section 8 is preferably covered at the front with a panel 25.

[0056] The design of cabinet elements 5 and 6 is shown using the example of the left cabinet element 5 in the Fig. 13 to 14 shown, whereas Fig. 17 shows a right-hand cabinet element 6.

[0057] Each cabinet element 5 or 6 has a frame 17, as shown in Fig. Figures 18 to 21 are shown. This frame 17 has individual profile elements 18 welded together.

[0058] For the formation of intake compartments 4, a frame 17 is divided in the vertical direction 16 into individual sections 26, as can be seen in particular from the illustration according to Fig. 20.

[0059] Each section 26 includes a support plate 19, serving as the base plate of the associated receiving compartment 4, for an accumulator module 2, which is preferably welded to the frame 17. The arrangement of the support plates 19 is shown in particular in the illustrations according to the Fig. 22 to 24. In the vertical direction, a cover plate 24 is arranged at the top as a finishing element.

[0060] The receiving compartments 4 provided by sections 26 each have internal dimensions, at least in the width direction 27, that exceed the external dimensions of an accumulator module 2 in order to form a gap space 23. This relationship is particularly evident from a review of the Fig. 9 to 12. This gap 23 can either be left open or filled with insulating material to form an air channel.

[0061] As can be seen in particular from the detailed presentation after Fig. Each support plate 19 is supported at its edge by a rail 20. The support plate 19 can be welded either to this rail 20 and / or to a profile element 18 of the frame 17.

[0062] For the secure positioning of an accumulator module 2 within a receiving compartment 4, preferably two connecting plates 21 are provided for each receiving compartment 4, with which the accumulator module 2 is screwed. Fig. Figure 11 shows a right-hand connecting plate 21 with reference to the accumulator module 2 shown here.

[0063] Spacers 22 are also provided to ensure the positional stability of an accumulator module 2 within a receiving compartment 4, as can be seen in particular from illustrations 16 and 26.

[0064] Each receiving compartment 4 has side walls 15. These side walls 15 provide the spacers 22 on the receiving compartment side. In the final assembly state, an accumulator module is arranged between the two spacers 22 of a receiving compartment 4.

[0065] As in particular a synthesis of Fig. 13 and Fig. As can be seen from Figure 22, each side wall 15 is designed in a tub-like manner and provides a volume space 38 that is open on one side and, in the final assembled state, is flush with the profile elements 18 of the frame 17 on the outside.

[0066] On the receiving side, the volume space 38 provided by a side wall 15 is limited by a cover plate. The volume space 38 serves for the optional storage of insulation material.

[0067] Each receiving compartment 4 is equipped on the rear with a cover 28, also shaped like a shell, which closes the corresponding receiving compartment from the rear. Each cover 28 has a cover plate 39 equipped with through-openings 29.

[0068] As can be seen in particular from a review of the Fig. 26 and Fig. As a result of the 28, a rear back panel 30 is provided for each cabinet element, spanning the individual covers 28 of the receiving surface 4. A gap 32 is formed between the back panel 30 of the cabinet element 5 or 6 and the individual covers 28 of the receiving compartments 4. Openings 31 formed in the back panel 30 are offset in the vertical direction 16 from the passage openings 29 in the covers 28, thus creating an overall labyrinthine guide.

[0069] Each receiving compartment 4 has a front cover 12 provided on the front, as can be seen from a review in particular of the Fig. 27 to 31.

[0070] A front cover 12 is double-walled and has two walls 33 and 34 spaced apart from each other, leaving a gap 37. Both walls 33 and 34 each have passage openings 35 and 36. In the illustrated embodiment, the passage openings 36 in wall 34 are letter-shaped.

[0071] In its intended use, cooling air can enter the respective storage compartments 4 through the front openings 35 and 36 and flow past the accumulator modules 2, which are arranged at a distance from the side walls of a storage compartment 4. Air is discharged through the rear openings.

[0072] In the event of an accident, flue gas can also be extracted via the air path described above.

[0073] The two cabinet elements 5 and 6 are housed within a casing of the cabinet unit 3, which has a rear wall 10 and two side walls 13. The rear wall 10 is positioned at a distance from the rear walls 30 of the cabinet elements 5 and 6, forming an air duct 11. The side walls 13, meanwhile, enclose the volume spaces 38 provided by the respective side walls 15 of the cabinet elements 5 and 3.

[0074] Each cabinet element 5 or 6 also has a respective drip tray 14, which is arranged to be movable and serves, for example, to collect any electrolyte that may leak out.

[0075] The aforementioned design is advantageously standardized and allows for the accommodation of accumulator modules 2 regardless of their cell chemistry. Depending on the cell chemistry used, the free space provided by the cabinet unit 3 can be used for individual fitting with insulating materials, thus enabling fire protection and emergency backup adapted to the cell chemistry. Reference sign 1 Accumulator system 2 Accumulator modules 3 cabinet units 4 Recording compartment 5 Cabinet element, left 6 Cabinet element, right 7 Roof hatch 8 foot section 9 Foot profile piece 10 Back panel 11 Air duct 12 Cover 13 Side wall 14 drip tray 15 side wall 16 Altitude 17 frame 18 profile elements 19 Support plate 20 rail 21 Connecting plate 22 spacers 23 gap space 24 Cover plate 25 aperture Section 26 27 Latitude 28 Cover 29 Passage opening 30 Back panel 31 Passage opening 32 gap space 33 Wall 34 Wall 35 Passage opening 36 Passage opening 37 Free space 38 Volume space 39 Cover plate

Claims

[1] Accumulator system comprising a plurality of accumulator modules (2) each containing accumulator cells and a cabinet unit (3) housing the accumulator modules (2), which provides a storage compartment (4) for each accumulator module (2), wherein the cabinet unit (3) comprises two cabinet elements (5, 6) combined by means of a common roof hood (7) and a common base section (8), wherein a cabinet element (5, 6) comprises a frame (17) made of several welded profile elements (18) which is subdivided into sections (26) arranged one above the other in the vertical direction (16) to form storage compartments (4), wherein a support plate (19) serving as the base plate of the associated storage compartment (4) for an accumulator module (2) is provided for each section (26),wherein the receiving compartments (4) provided by the sections (26) each have internal dimensions exceeding the external dimensions of an accumulator module (2) at least in the width direction (27) to form a gap space (23), characterized by , that each receiving compartment (4) has a front-facing cover (12) arranged on the frame (17), which is double-walled, wherein the two walls (33, 34) are spaced apart from each other leaving a free space (37). [2] Accumulator system according to claim 1, characterized by , that for each receiving compartment (4) a connecting plate (21) arranged on the frame is provided for connection to an accumulator module (2). [3] Accumulator system according to claim 1 or 2, characterized by , that the gap space (23) contains an insulating material, wherein a layer of insulating material is arranged within the receiving compartment (4) on each side of the accumulator module. [4] Accumulator system according to any one of the preceding claims, characterized by , that an accumulator module (2) carries on its upper side a textile mat arranged in the receiving compartment (4), in particular a water-binding textile mat which releases water under the influence of heat. [5] Accumulator system according to any one of the preceding claims, characterized by , that the two walls (33, 34) have passage openings (35, 36) arranged offset from each other, forming a labyrinthine guide. [6] Accumulator system according to any one of the preceding claims, characterized by , that each receiving compartment (4) on the frame (17) is provided with side walls (15) which are each shell-shaped and have a volume space (38) open on one side towards the receiving compartment for receiving an insulating material. [7] Accumulator system according to claim 6, characterized bythat the side walls (15) have a spacer (22) on their inner side facing the receiving compartment. [8] Accumulator system according to any one of the preceding claims, characterized by , that each receiving compartment (4) has a rear cover (28) arranged on the frame (17), which is shell-shaped and has a cover plate (39) equipped with through-openings (29). [9] Accumulator system according to any one of the preceding claims, characterized by , that for each cabinet element (5, 6) a rear wall (30) extending over all receiving compartments (4) is provided, which is arranged spaced apart from the respective cover plates (39) of each receiving compartment (4). [10] Accumulator system according to any one of the preceding claims, characterized by, that the cabinet unit (3) has a common rear wall (10) for both cabinet elements (5, 6), which is arranged at a distance from the two cabinet elements (5, 6) forming an air duct (11). [11] Accumulator system according to any of the preceding claims, characterized by , that the two frames (17) of the cabinet elements (5, 6) are screwed together. [12] Accumulator system according to any one of the preceding claims, characterized by , that for each cabinet element (5, 6) a drip tray (14) is provided arranged in the vertical direction (16) below the lowest receiving compartment (4). [13] Cabinet unit for an accumulator system according to any one of the preceding claims 1 to 12, wherein the cabinet unit (3) comprises two cabinet elements (5, 6) combined with one another by means of a common roof hood (7) and a common base section (8), wherein a cabinet element (5, 6) comprises a frame (17) made of several profile elements (18) welded together, which is subdivided into sections (26) arranged one above the other in the vertical direction (16) to form receiving compartments (4), wherein a support plate (19) for an accumulator module (2) is provided for each section (26) serving as a base plate of the associated receiving compartment, wherein the receiving compartments (4) provided by the sections (26) each have internal dimensions that exceed the dimensions of an accumulator module (2) at least in the width direction (27) to form a gap space (23), characterized by, that each receiving compartment (4) has a front-facing cover (12) arranged on the frame (17), which is double-walled, wherein the two walls (33, 34) are spaced apart from each other leaving a free space (37).

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