Receiving device for energy storage units and method for producing a receiving device

Abstract

Method for producing a temperature-controlled receiving device for, in particular, electrical energy storage units, comprising: - Providing a base body (64) with recesses (66) in a predefined arrangement for receiving elements (50) which are assigned to at least one energy storage unit, and arranging the receiving elements (50) in the recesses (66); - Providing a holding body (16) for fixing the receiving elements (50), wherein the holding body (16) is formed at least in sections around the base body (64) and an inlet (42) for a heat transfer medium and an outlet (46) for the heat transfer medium are arranged or formed on the holding body (16); - Decomposing the base body (64), wherein the holding body (16) is in engagement with connecting regions (74) of the receiving elements (50), so that the receiving elements (50) remain fixed to the holding body (16) after decomposing the base body (64) and, due to the existing engagement between the holding body (16) and the receiving elements (50), regions positioned between them and remaining after decomposing the base body (64) are sealed off from the outside.

Description

[0001] The present invention relates to a method for producing a temperature-controlled receiving device for, in particular, electrical energy storage units.

[0002] Furthermore, the present invention relates to a temperature-controlled receiving device for, in particular, electrical energy storage units.

[0003] Mounting devices for electrical energy storage units, in particular battery cells, are known, for example, from DE 10 2008 010 821 A1 and DE 10 2015 013 377 A1. Such mounting devices form modules, for example, to provide electrical power in a way that is easily scalable with regard to the application. In the case of electric batteries, the electrochemical processes are temperature-dependent. Therefore, temperature control is required. High temperatures prove beneficial for the capacity of the batteries and increase their ion and electron mobility. However, excessive temperatures should be avoided, as they can cause irreversible chemical reactions or the loss of electrolytes.

[0004] When controlling the temperature of batteries, it is known to use a heat transfer medium, which can be liquid. For example, a water-glysantin mixture is used. It is known that the energy storage units are enclosed in a hollow body through which the heat transfer medium flows.

[0005] Conventional storage systems utilize numerous individual components that must be sealed relative to one another, requiring considerable manufacturing effort. Dead spaces can form inside the hollow body, preventing the heat transfer medium from flowing through them. This can lead to areas of excessive temperature in the energy storage units and thus cause failures.

[0006] EP 3 471 167 A1 describes a battery housing for the structural integration of batteries in a vehicle, in particular an aircraft or a spacecraft. The battery housing comprises an inner housing for accommodating a battery and an outer housing surrounding the inner housing. A cavity is formed between the inner housing and the outer housing. Pins are formed in the cavity and connect the inner housing to the outer housing. A battery assembly comprises at least one battery housing of the type described above and at least one battery arranged in the inner housing.

[0007] DE 10 2017 204 724 A1 describes a battery module comprising a cell carrier plate and a plurality of battery cells. The battery cells are arranged on the cell carrier plate and have a cell housing and at least one cell coil arranged therein. The cell housings are preferably cup-shaped and formed integrally with the cell carrier plate.

[0008] The object of the present invention is to provide a method for the cost-effective and simple production of a temperature-controlled receiving device for energy storage units.

[0009] This object is achieved by a method according to the invention for producing a temperature-controlled receiving device for, in particular, electrical energy storage units, which method comprises the features of claim 1.

[0010] In the method according to the invention, recesses for the receiving elements are formed on or in a base body. It is possible to pre-fix the receiving elements to the base body. By means of the holding body, the receiving elements can be fixed in the desired position for the receiving device, wherein the holding body surrounds the base body at least partially and preferably completely. The method according to the invention further provides for decomposing the base body. The receiving elements remain fixed to the holding body and are arranged at least partially in its interior. During operation of the receiving device, a heat transfer medium can flow from the inlet to the outlet and dissipate heat from the receiving elements, into which the energy storage units can be inserted.

[0011] It is shown that the method according to the invention makes it possible to manufacture the receiving device with few manufacturing steps and using fewer components.

[0012] Before it is decomposed, the base body can be considered an inner body arranged within the holding body forming an outer body. The holding body can, in particular, form a housing that encloses the base body on all sides and, after the base body is decomposed, becomes a housing for the receiving device.

[0013] It is advantageous that the holding body engages with the connection areas of the receiving elements. This allows the receiving elements to be fixed and remain attached to the holding body even after the base body has been disintegrated.

[0014] It is advantageous that the existing engagement of the holding body with the receiving elements seals off the areas positioned between them after the base body has disintegrated. The interior of the holding body is sealed off from the outside, in particular, by the holding body engaging with the receiving elements.

[0015] The holding body is advantageously formed such that the receiving elements with insertion openings for the energy storage units protrude from the base body. The holding body can then be arranged such that the insertion openings are located in a wall of the holding body or protrude beyond it. This allows for the energy storage units to be inserted into the receiving elements in a simple manufacturing process.

[0016] In particular, after the base body has been decomposed, battery cells are inserted into the receiving elements as energy storage units and electrically contacted.

[0017] It is advantageous if, before the holding body is provided, connection elements forming the inlet and outlet are arranged on the base body, which are not subject to decomposition. For example, the connection elements are fixed by the holding body when it is provided and remain so even after the base body has been decomposed.

[0018] The inlet and the outlet, in particular the two connecting elements, are advantageously arranged on opposite end sides of the receiving device.

[0019] It is advantageous if the base body is decomposed by dissolving it with a liquid. The base body is advantageously made of a liquid-soluble material, in particular a water-soluble material, a material soluble in alcohol (especially ethanol), or a terpene-soluble material (e.g., limonene). After the holding body is provided, the base body can be exposed to the liquid, making it easy to dissolve during production.

[0020] For example, the dissolution step is carried out by means of an immersion bath into which the holding body surrounding the base body is immersed, or the dissolution of the base body is carried out by means of liquid flowing through the holding body.

[0021] The base body is made, for example, at least partially of polyvinyl acetate (PVA), high-impact polystyrene (HIPS), isomalt, or a salt (e.g., uniaxially pressed or cast), or of a material based on these. These materials are liquid-soluble and allow easy decomposition of the base body, for example, in an immersion bath. For example, PVA is water-soluble, and HIPS dissolves in limonene.

[0022] A suitable material is the PVA-based Ethy-Lay, which can be dissolved in alcohol (e.g., denatured alcohol) (https: / / 3druck.com / 3d-druckmaterialien / lay-away-filament-reihe-fuerstuetzstrukturen-entwickelt-von-kai-parthy-1344455 / ) and can withstand higher temperatures than PVA. Ethy-Lay is available, for example, under the product number MNQSU7M8 from Matterhackers, Foothill Ranch (CA), USA (https: / / www.matterhackers.com / ).

[0023] It can be advantageous if the base body is decomposed by mechanical action, whereby the base body is preferably made of an embrittling material. For example, the material Spoolworks Scaffold SNAP, which consists partly of HIPS, may prove suitable and can become brittle and fracture during curing. (https: / / www.3dmensionals.de / spoolworks-scaffold-snap-support-filamentsilber-silver). Any residue can be removed. Spoolworks Scaffold SNAP is available, for example, under product number MRZDU4J1 from Matterhackers, Foothill Ranch (CA), USA. (https: / / www.matterhackers.com / ).

[0024] The base body can be produced, for example, by an additive process, in particular by 3D printing. The recesses can advantageously be formed integrally in the base body during the additive process. Accordingly, the material for manufacturing the base body is preferably a 3D-printable material, such as PVA, HIPS, Ethy-Lay, or Spoolworks Scaffold SNAP.

[0025] Alternatively, it can be provided that the base body is provided by a casting process, wherein in this case too the recess is preferably formed integrally in the base body.

[0026] In a preferred embodiment of the method, the receiving elements can be positioned in the receptacles, for example, by casting or pressing. For example, the receiving elements can be encapsulated if the base body is provided by a casting process. In the case of a base body produced by additive manufacturing, particularly 3D printing, this could, for example, be printed around the receiving elements.

[0027] The receiving elements are advantageously arranged in a form-fitting manner in the receptacles.

[0028] It is advantageous if the recesses are formed as through-openings in the base body, and if the receiving elements protrude from the base body with at least one end section and preferably two opposite end sections, wherein an insertion opening for the energy storage unit is formed at at least one end section. For example, the holding body can be provided such that it surrounds the end section of the receiving element, while the insertion opening remains freely accessible for inserting the energy storage unit.

[0029] It can be provided that the base body and / or the receiving elements are coated, particularly in the region of the edges of the recesses, before the holding body is provided. For example, the base body is coated, whereby, for example, two-component epoxy compounds or liquid rubber can be used. Alternatively or additionally, a coating of the receiving elements is conceivable. By means of the coating, particularly in the region of the edges of the recesses on the receiving element and / or the base body, it can be prevented, for example, that material used to cast the holding body penetrates into the base body and / or the recesses.

[0030] A coating on the receiving elements can also have the advantage that a seal can be achieved so that no heat transfer medium can escape to the outside between the holding body and the receiving elements during operation of the receiving device.

[0031] The receiving elements are, for example, sleeve-shaped.

[0032] Advantageously, the receiving elements are made of a thermally conductive material, for example of a metal, in particular of aluminum.

[0033] In a preferred embodiment of the method, the holding body is advantageously produced by casting on and in particular by casting around the base body(s) comprising the receiving elements.

[0034] The retaining body is manufactured using a plastic molding process, such as vacuum casting from polyurethane or an injection molding process. Various materials can be used in injection molding processes, including ABS, ABS / PC, HDPE, LDPE, LSR, nylon-polyamide, PPT, PC, PEEK, PEI, POM (acetate), PP, PPS, PS, TPC-ET, TPE / TPV, or TPU.

[0035] A vacuum casting resin (e.g. SG95) is used as a material for casting the holding body.

[0036] For example, a silicone negative mold can be used as a casting mold for the holding body.

[0037] The holding body is advantageously made of a liquid-insoluble, in particular water-insoluble, and / or a thermally and / or electrically non-conductive material.

[0038] The connection elements are, for example, grooves in the receiving elements into which the holding body engages. For example, the receiving elements protrude beyond the base body with a respective section where the connection area is arranged. During the positioning of the holding body, particularly during the casting process, its material can engage with the connection areas and thus be fixed to the receiving elements. For example, the casting material for the holding body can engage in the aforementioned grooves.

[0039] In particular, there is an engagement between the receiving elements at the above-mentioned connection areas with walls of the holding body which enclose the interior of the receiving device.

[0040] It is advantageous if the receiving elements are positioned in a regular arrangement. For example, rows of receiving elements positioned laterally next to each other are provided, with the receiving elements in adjacent rows arranged with gaps between them. The receiving elements can be positioned at the corners of equilateral triangles when viewed from above, similar to an arrangement according to the closest "sphere" packing.

[0041] In a preferred embodiment, it is provided that a total of 28 receiving elements are present, which are arranged in three rows, in a middle row of ten and two outer rows of nine each.

[0042] It is advantageous if the receiving elements are free of contact with each other after the base body has decomposed. This prevents thermal bridging between the receiving elements. The cooling properties of the receiving device are improved by allowing the heat transfer medium to flow past the receiving elements.

[0043] Preferably, the receiving elements can be flowed around by the heat transfer medium transversely to a direction of extension.

[0044] The receiving elements are advantageously accommodated in the base body with the same orientation. For example, as mentioned above, the receiving elements are sleeve-shaped with axes running parallel to one another.

[0045] In terms of structural simplification, it is advantageous if the receiving elements are designed to be identical or have the same function.

[0046] It is advantageous if coupling elements are formed on the holding body for interaction with corresponding coupling elements of an identically constructed receiving device. In particular, it is possible for corresponding coupling elements of adjacent receiving devices to abut one another in a form-fitting manner or to engage with one another. A plurality of receiving devices can be arranged compactly in this way.

[0047] As mentioned above, the present invention also relates to a receiving device. The object of the present invention is to provide a receiving device that can be manufactured more easily.

[0048] This object is achieved by a receiving device according to the invention according to independent claim 18.

[0049] The object is further achieved by a receiving device according to the invention, comprising the features of independent claim 19.

[0050] The advantages of the recording device according to the invention are evident from the preceding explanations. To avoid repetition, reference is made to the above explanations.

[0051] Advantageous embodiments of the recording device result from advantageous embodiments of the method according to the invention, so that reference can also be made to the above explanations in this regard.

[0052] The following description of preferred embodiments of the invention, taken in conjunction with the drawings, serves to explain the invention in more detail. They show: Fig. 1: a schematic perspective view of a base body for producing a receiving device according to the invention; Fig. 2: a sectional view along the line 2-2 in Fig. 1; Fig. 3: a representation corresponding Fig. 1 after inserting receiving elements into the base body and arranging connecting elements; Fig. 4: a sectional view along the line 4-4 in Fig. 3; Fig. 5: an enlarged view of detail A in Fig. 4; Fig. 6: a representation corresponding Fig. 3 after providing a holding body surrounding the base body; Fig. 7: a sectional view along the line 7-7 in Fig. 6; Fig. 8: an enlarged view of detail B in Fig. 7; Fig. 9: the base body with receiving elements and the surrounding holding body in an immersion bath for decomposing the base body; and Fig. 10: a plurality of receiving devices according to the invention with electrical supply units accommodated therein in a perspective view.

[0053] The present invention relates to a method for producing a temperature-controlled holding device for energy storage units, which in this case are, in particular, electrical energy storage units in the form of batteries. Furthermore, the present invention relates to a holding device according to the invention.

[0054] Fig. 10 shows a perspective view of a plurality of advantageous embodiments of the receiving device according to the invention, each of which is identical in construction and is designated overall by the reference numeral 10 and in which a plurality of batteries 12 are accommodated, in the present case 28 batteries.

[0055] The respective receiving device 10 comprises a housing 14 formed by a holding body 16. The housing 14 largely defines the external appearance and contour of the receiving device 10. The housing 14 is block-shaped and has a longitudinal extension along a longitudinal direction 18. A wall 20 is provided with an upper wall 22, a lower wall 24 spaced therefrom, and a circumferential side wall 26. In the present case, the walls 22, 24 are essentially planar and aligned parallel to one another. However, this is not absolutely necessary.

[0056] The side wall 26 is corrugated on a front side 28 and a rear side 30, respectively, and adapted to the contour of the receiving elements explained below. Coupling elements 32 and 34, respectively, are positioned on the front side 28 and the rear side 30. These coupling elements 32, 34 can interact with corresponding coupling elements 34 and 32, respectively, of an adjacent receiving device 10. Several receiving devices 10, each of which forms a module for receiving batteries 12, can be compactly connected to one another in this way.

[0057] In the present case, the coupling elements 34 are designed as ribs which engage in the coupling elements 32 designed as grooves.

[0058] On the front side, the housing 14 has a first end wall 36 and on an opposite side, a second end wall 38. A connection element 40 for connecting a supply line (not shown in the drawing) is arranged on the end wall 36. The receiving device 10 forms an inlet 42 on the connection element 40.

[0059] A connection element 44 is arranged on the end wall 38 for connecting a discharge line (not shown in the drawing). The receiving device 10 forms an outlet 46 on the connection element 44.

[0060] A heat transfer medium, in particular a water-glysantin mixture, can flow through the receiving device 10, since the housing 14 is hollow on the inside and encloses an interior space 48 in which receiving elements 50 for the batteries 12 (battery cells) are positioned at a distance from one another. The heat transfer medium flows through the interior space 48 and the gaps 52 between the receiving elements 50 transversely to their direction of extension. Heat generated at the receiving elements 50 can thus be effectively dissipated.

[0061] The receiving device 10 comprises a receiving element 50 assigned to a respective battery 12. The receiving elements 50 are elongated sleeves 56 aligned parallel to one another. In the present case, 28 sleeves 56 are provided, corresponding to the number of batteries 12.

[0062] The sleeves 56, and thus the batteries 12, are positioned in a regular array. In a top view of the receiving device 10, the sleeves 56 are arranged at the corners of imaginary triangles, similar to a densely packed "sphere." The sleeves 56 are positioned side by side in rows, with the sleeves in adjacent rows arranged "with gaps."

[0063] However, the sleeves 56 are spaced apart from one another and do not contact one another, particularly with sections 58 arranged in the interior space 48. The heat transfer medium can thus flow through the gaps 52. Thermal contact between the sleeves 56 is avoided. The sleeves 56 are also spaced apart from the side wall 26, so that the heat transfer medium can flow between the sleeves 56 and the side wall 26.

[0064] The sleeves 56 engage at the ends in openings 62 of the housing and in particular of the walls 22, 24.

[0065] The batteries 12 are inserted into the sleeves 56 and electrically connected therein. Depending on the requirements, a series or parallel connection can be provided.

[0066] The following is based on reference to the Fig. 1 to 9 an advantageous embodiment for producing the receiving device 10 is discussed.

[0067] The process is particularly characterized by simple and cost-effective production using fewer components.

[0068] In a first procedural step ( Fig. 1 and Fig. 2) A base body 64 is provided. The base body 64 is manufactured, for example, by means of an additive process, in particular 3D printing, or by a casting process.

[0069] It is advantageous if the shape of the base body 64 is already adapted, or largely or essentially adapted, to the shape of the housing 14 to be achieved later. In particular, the outer contour of the base body 64 and the housing 14 can be approximately spatially congruent.

[0070] Recesses 66 are provided in the base body 64 for later accommodating the receiving elements 50 in a defined arrangement. In the present case, the recesses 66 are formed as through-openings of the base body 64, particularly integrally during its manufacture. The recesses 66 are arranged regularly according to the later arrangement of the receiving elements 50, corresponding to the arrangement of the receiving elements 50 with gaps at the corners of imaginary equilateral triangles.

[0071] On the base body 64, projections 68, 70 are formed on opposite sides, which correspond to the later sides 28, 30, for example in the form of peg-like projections.

[0072] In a subsequent process step, the receiving elements 50 are arranged in the recesses 66. In this case, the receiving elements 50 are dimensioned such that they are inserted into the recesses 66 in a form-fitting manner in a circumferential direction. In doing so, they each protrude from the base body 64 with opposing end sections 72.

[0073] In the present example, the receiving elements 50 are secured to the base body 64 by means of a press fit. Alternatively, it is conceivable that the receiving elements 50 are cast directly into the base body 64 during its manufacture using a casting process, i.e., the "recesses" are not exposed during the casting process, but rather the receiving elements 50 are already arranged in them.

[0074] At the end sections 72, the receiving elements 50 comprise connection areas 74 for later fixing to the holding body 16. It is advantageous, for example, if the connection areas comprise grooves 76 which are arranged circumferentially on the sleeves 56 ( Fig. 4 and Fig. 5). The receiving elements 50 are dimensioned such that the grooves 76 protrude beyond the edges of the recesses 66.

[0075] Furthermore, the connecting elements 40 and 44 are arranged on the base body 64 at the projections 68 and 70, respectively. In this case, the connecting elements 40 are sleeve-shaped and dimensioned such that they overlap the projections 68, 70 ( Fig. 4).

[0076] It is possible to coat the base body 64 before providing the holding body 16, for example, with a two-component epoxy material or liquid rubber. Advantageously, the receiving elements 50 are coated, in particular, at the connection areas 74 and the edges of the recesses 66. This proves advantageous for the subsequent sealing of the housing 14 relative to the sleeves 56.

[0077] In a subsequent process step, the holding body 16 is provided. It is advantageous, for example, if the holding body 16 is provided by a casting process. A vacuum casting resin, such as SG 95, is used, for example, to enclose the base body 64 in an external negative mold. This mold gives the holding body 16 the subsequent shape of the housing 14. The holding body 16 surrounds the base body 64 on all sides.

[0078] In particular, it is advantageous if the receiving elements 50 are fixed by means of the holding body 16 ( Fig. 7 and Fig. 8). The material of the holding body 16 engages the connection areas 74 and, in particular, the grooves 76. As the material hardens, the receiving elements 50 are thereby secured in their final position. At the same time, a seal is ensured between the material of the holding body 16 and the receiving elements 50.

[0079] It is advantageous if the layer thickness of the material of the holding body 16, with which the base body 64 is cast, is homogeneous or substantially homogeneous.

[0080] After the material of the holding body 16 has been prepared and cured, insertion openings 78 of the receiving elements 50 remain freely accessible for inserting the batteries 12. The batteries 12 can be inserted into the receiving elements 50 through these insertion openings 78 and then electrically contacted.

[0081] As already mentioned, the base body 64 is made of a liquid-soluble and, in particular, water-soluble material. In contrast, the holding body 16 is made of a liquid-soluble and, in particular, water-insoluble material. Furthermore, the material of the holding body 16 has only low thermal conductivity. Therefore, the housing 14 essentially does not heat up during operation. Waste heat is dissipated via the heat transfer medium.

[0082] In a subsequent process step, the base body 64 is decomposed ( Fig.9). The decomposition occurs by dissolving the material of the base body 64 using a liquid.

[0083] Conveniently, an immersion bath 80, filled, for example, with water 82 as the liquid, is provided. The cast base body 64 is immersed in the immersion bath 80 and dissolved.

[0084] What remains is the receiving device 10 with the housing 14 formed by the holding body 16, to which the connecting elements 40 and 44 as well as the receiving elements 50 are fixed. List of reference symbols 10 Recording device 12 Battery 14 housings 16 holding bodies 18 Longitudinal direction 20 wall 22 upper wall 24 lower wall 26 Side wall 28 front page 30 back page 32 coupling element 34 coupling element 36 front wall 38 front wall 40 connecting element 42 Entrance 44 connecting element 46 Outlet 48 Interior 50 receiving element 52 space 56 sleeve Section 58 62 Opening 64 basic bodies 66 recess 68 approach 70 approach 72 final section 74 Connection area 76 grooves 78 insertion opening 80 Immersion bath 82 Water

Claims

[1] Method for producing a temperature-controlled receiving device for, in particular, electrical energy storage units, comprising: - Providing a base body (64) with recesses (66) in a predefined arrangement for receiving elements (50) which are assigned to at least one energy storage unit, and arranging the receiving elements (50) in the recesses (66); - Providing a holding body (16) for fixing the receiving elements (50), wherein the holding body (16) is formed at least in sections around the base body (64) and an inlet (42) for a heat transfer medium and an outlet (46) for the heat transfer medium are arranged or formed on the holding body (16); - Decomposing the base body (64), wherein the holding body (16) is in engagement with connecting regions (74) of the receiving elements (50), so that the receiving elements (50) remain fixed to the holding body (16) after decomposing the base body (64) and, due to the existing engagement between the holding body (16) and the receiving elements (50), regions positioned between them and remaining after decomposing the base body (64) are sealed off from the outside. [2] Method according to claim 1, characterized by that the holding body (16) is formed such that the receiving elements (50) with insertion openings (78) for the energy storage units protrude from the base body (64). [3] Method according to claim 1 or 2, characterized by that after the decomposition of the base body (64), battery cells (12) are inserted into the receiving elements (50) as energy storage units and electrically contacted. [4] Method according to one of the preceding claims, characterized bythat before the holding body (16) is provided, connecting elements (40, 44) forming the inlet (42) and the outlet (46) are arranged on the base body (64) and are not decomposed. [5] Method according to one of the preceding claims, characterized by that the base body (64) is decomposed by dissolving by means of a liquid, wherein the base body (64) is made of a liquid-soluble material, in particular a water-soluble material. [6] Method according to claim 5, characterized by that the dissolving step is carried out by means of an immersion bath (80) or by means of liquid flowing through the holding body (16). [7] Method according to one of the preceding claims, characterized by that the base body (64) is decomposed by mechanical action, wherein the base body (64) is made of an embrittling material. [8] Method according to one of the preceding claims, characterized bythat the base body (64) is provided by an additive process, in particular 3D printing, or by a casting process, wherein the recesses (66) are preferably formed integrally in the base body (64). [9] Method according to one of the preceding claims, characterized by that the receiving elements (50) are positioned in the recesses (66) by casting or by pressing in and / or that the receiving elements (50) are arranged in a form-fitting manner in the recesses (66). [10] Method according to one of the preceding claims, characterized by that the recesses (66) are formed as through-openings of the base body (64) and that the receiving elements (50) protrude from the base body (64) with at least one end section (72) and preferably two mutually opposite end sections (72), wherein an insertion opening (78) for the energy storage unit is formed at at least one end section (72). [11] Method according to one of the preceding claims, characterized by that the base body (64) and / or the receiving elements (50) are coated, in particular in the region of edges of the recesses (66), before the holding body (16) is provided. [12] Method according to one of the preceding claims, characterized by that the receiving elements (50) are sleeve-shaped and / or are made of a thermally conductive material, for example of a metal. [13] Method according to one of the preceding claims, characterized by that the holding body (16) is produced by casting on and in particular by casting around the base body(s) (64) comprising the receiving elements (50). [14] Method according to one of the preceding claims, characterized by that the holding body (16) is made of a liquid-insoluble, in particular water-insoluble, and / or a thermally and / or electrically non-conductive material. [15] Method according to one of the preceding claims, characterized by that the connection areas (74) are or comprise grooves (76) into which the holding body (16) engages. [16] Method according to one of the preceding claims, characterized by that the receiving elements (50) are positioned in a regular arrangement, in particular that rows of receiving elements (50) positioned laterally next to one another are provided, wherein the receiving elements (50) are arranged in adjacent rows with a gap to one another and / or that the receiving elements (50) are positioned at corner points of equilateral triangles in plan view. [17] Method according to one of the preceding claims, characterized by that the receiving elements (50) are free from contact with one another after decomposition of the base body (64) and / or that the receiving elements (50) can be flowed around by a heat transfer medium transversely to a direction of extension. [18] Receiving device, manufactured according to a method according to one of the preceding claims, wherein electrical energy storage units are arranged in the receiving elements (50) and are electrically contacted, and wherein the holding body (16) is in engagement with connection regions (74) of the receiving elements (50), so that the receiving elements (50) are fixed to the holding body (16) and, due to the existing engagement between the holding body (16) and the receiving elements (50), regions positioned between them are sealed off from the outside. [19] A receiving device comprising a holding body (16) with a wall and an interior space (48) surrounded by the wall (20), an inlet (42) into the interior space (48) for connecting a supply line and an outlet (46) from the interior space (48) for connecting a discharge line, wherein the receiving device (10) further comprises receiving elements (50) which engage with the holding body (16) at connection regions (74) and are thereby fixed to the holding body (16), wherein the receiving elements (50) are positioned at least in sections in the interior space (48) and have a respective insertion opening (78) for inserting an energy storage unit, in particular an electrical one, wherein the receiving device (10) further comprises energy supply devices inserted into the receiving elements (50), and wherein the holding body (16) is sealed in the region of openings (62) of the wall (20) by the existing engagement with the receiving elements (50).

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