Housing for a battery cell arrangement, method for its production and temperature-controlled battery cell arrangement

Abstract

Housing (1) for a battery cell arrangement, in particular for use in an electrically powered motor vehicle, comprising: at least one first housing part (2); and at least one second housing part (3), which second housing part (3) is or can be detachably connected to the first housing part (2); in which, in a connected state, a housing interior (5) for accommodating a number of battery cells (11) is formed between the first housing part (2) and the second housing part (3); in which at least one of the two housing parts (2, 3) has the following structure: a first cover layer (2a, 3a) made of sheet metal; a second cover layer (2b, 3b) made of sheet metal; an intermediate layer (2c, 3c) arranged between the first cover layer (2a, 3a) and the second cover layer (2b, 3b) made of a shear and compression-resistant, formable material, which material is permanently connected to the cover layers (2a, 2b, 3a, 3b); in which at least one of the cover layers (3a) is formed from at least two adjacent metal sheets (3aa, 3ab), of which at least one (3ab) has a structure, so that channels (6, 6', 6") for a heat-conducting fluid for dissipating heat from the housing (1) are formed between the two metal sheets, in which a supply line (8) and a discharge line are formed on at least one of the two metal sheets (3aa) for supplying a heat conduction fluid to the channels (6, 6', 6") and for discharging a heat conduction fluid from the channels (6, 6', 6").

Description

[0001] The invention relates to a housing for a battery cell arrangement, in particular for use in an electrically powered motor vehicle, according to claim 1.

[0002] Furthermore, the invention relates to a temperature-controlled battery cell arrangement according to claim 10 and to a method for producing a housing for a battery cell arrangement, in particular for use in an electrically powered motor vehicle, according to claim 12.

[0003] Housings for battery cell assemblies are known from the prior art, which are manufactured as costly cast parts to provide a temperature control function. Furthermore, it is known that such housings for battery cell assemblies are assembled from a multitude of individual parts, resulting in high assembly costs and requiring considerable installation space.

[0004] DE 10 2016 119 986 A1 discloses a heat exchanger plate for battery packs for electrified vehicles. Specifically, the Fig. 6 illustrates a heat exchanger plate comprising a plate body constructed from a plurality of stamped metal pieces that are either soldered or welded. Specifically, this involves a first plate piece that forms the inner wall of the heat exchanger plate, a second plate piece that forms the outer wall of the heat exchanger plate, and a third plate piece that may be formed from corrugated material. First, the third plate piece is attached to the first plate piece, and then the second plate piece is attached to the first plate piece. Furthermore, it is provided that an air gap is formed between the second plate piece and the third plate piece. The edges designated by reference numerals (actually "wave crests") of the third plate piece should not touch the second plate piece so that the air gap is not interrupted.

[0005] US 2009 / 0142628 A1 relates to a battery system that is cooled by means of a coolant. In this case, cavities of a cooling plate can be filled with a plastic foam, which is evident, for example, from the illustration in Fig. 4. Reference numeral 6 denotes cooling lines, which are incorporated as additional elements into the actual cooling plate. The plastic foam has heat-insulating properties.

[0006] DE 10 2017 104 711 A1 relates to a high-voltage energy storage device in a motor vehicle, which has a multi-layer housing cover. The housing cover comprises a lower metal layer and an upper metal layer, which define a cover space between them and are firmly connected to each other at the edges. Furthermore, the cover space is substantially filled with a plastic core layer, wherein the plastic core layer mechanically connects the two metal layers. The plastic core layer substantially completely fills the cover space and is mechanically firmly connected to the two metallic cover layers over their entire surface via an adhesive bond.

[0007] DE 10 2013 104 635 A1 describes a method for producing a component from a composite material. The component described in the cited document has two metallic cover layers and at least one plastic layer made of at least one thermoplastic polymer foam arranged between the metallic cover layers. Furthermore, the polymer foam is heated, allowing the composite material to be optionally formed.

[0008] The invention is based on the object of providing a novel housing for a battery cell arrangement, particularly for traction batteries in electric vehicles, which, while offering good temperature control, is characterized by reduced costs, reduced assembly effort, and smaller installation space compared to the prior art. The housing can be integrated into an existing circuit for a heat-conducting fluid in order to efficiently dissipate heat from the interior of the housing. The invention is further based on the object of providing a method for producing such a housing and a temperature-controlled battery cell arrangement that has corresponding advantages.

[0009] The object is achieved according to the invention by a housing for a battery cell arrangement having the features of claim 1, by a temperature-controlled battery cell arrangement having the features of claim 10 and by a method for producing a housing for a battery cell arrangement having the features of claim 12. Advantageous further developments are each the subject of subclaims.

[0010] According to a first aspect of the invention, a housing according to the invention for a battery cell arrangement, in particular for use in an electrically powered motor vehicle, comprises: at least one first housing part; and at least one second housing part, which second housing part is detachably connected or connectable to the first housing part, preferably screwed; in which, when the housing parts are connected, a housing interior for accommodating a number of battery cells is formed between the first housing part and the second housing part; in which at least one of the two housing parts has the following structure: a first cover layer made of sheet metal; a second cover layer made of sheet metal; an intermediate layer arranged between the first cover layer and the second cover layer and made of a shear- and compression-resistant, formable material, which material is permanently connected to the cover layers;in which at least one of the cover layers is formed from at least two adjacent metal sheets, at least one of which has a structure, so that channels for a heat-conducting fluid for dissipating heat from the housing are formed between the two metal sheets. It is provided that a supply line and a discharge line are formed on at least one of the two metal sheets for supplying a heat-conducting fluid to the channels and for discharging a heat-conducting fluid from the channels. With such a supply line or discharge line, the housing can be integrated into an existing circuit for a heat-conducting fluid in order to efficiently dissipate heat from the interior of the housing.

[0011] The aforementioned channels, which are created by the structuring of at least one of the metal sheets, form a flow space for the heat-conducting fluid to dissipate heat from the housing, i.e., from the battery cell arrangement. Due to the above-described design of the housing according to the invention, the channels are integrated into the housing structure, resulting in an overall simplified design with corresponding advantages in terms of cost and assembly effort. The required installation space can also be reduced compared to the prior art.

[0012] "Structuring" is understood here and below to mean any type of three-dimensional shaping of the at least one metal sheet, due to which the two metal sheets of the aforementioned cover layer do not lie flat against each other, but rather form defined cavities (channels) between them that can be filled with a heat-conducting fluid. The channels can be—without limitation—regular or irregular, symmetrical or asymmetrical, or formed in some other way. They are preferably fluidically connected to each other to create a continuous flow space for a heat-conducting fluid.

[0013] Preferably, the supply and discharge lines are located outside the housing interior. Accordingly, the channels within the respective housing section can be routed "outwards," i.e., to the supply / discharge lines. This eliminates the need for additional seals in the other housing section acting as the cover, and assembly is simplified.

[0014] According to a second aspect of the invention, a temperature-controlled battery cell arrangement according to the invention comprises: a housing according to the invention; at least one battery cell accommodated in the interior of the housing; and a heat-conducting fluid filled into the channels; in which the battery cell is in heat-conducting contact with one of the two metal sheets, preferably a substantially planar one of the two metal sheets.

[0015] In this way, the temperature-controlled battery cell arrangement according to the invention benefits from the aforementioned advantages of the housing according to the invention and thus enables the temperature control of a battery cell arrangement with reduced effort in terms of costs, assembly, and required installation space. The invention is fundamentally not limited to the temperature control of battery cells, but can be used to temperature control virtually any object (electrical modules, such as electric motors).

[0016] A method according to a third aspect of the invention for producing a housing for a battery cell arrangement, in particular for use in an electrically powered motor vehicle, comprises the following steps: producing at least one first housing part; and producing at least one second housing part, which second housing part is detachably connectable to the first housing part; so that between the first housing part and the second housing part, in a connected state, a housing interior for accommodating a number of battery cells is formed; in which at least one of the two housing parts is produced as follows: providing a first cover layer made of sheet metal; providing a second cover layer made of sheet metal; arranging an intermediate layer made of a shear- and compression-resistant, formable material, preferably a thermoplastic,between the first cover layer and the second cover layer; permanently connecting the intermediate layer to the cover layers; forming the arrangement of cover layers and intermediate layer to form the respective housing part, preferably after prior heating; and preferably detachably connecting the two housing parts to form the housing. At least one of the cover layers is made from at least two superimposed metal sheets, which metal sheets are firmly connected to one another in areas, preferably by a material bond, most preferably welded, soldered, or glued. Furthermore, a supply line and a discharge line are formed on at least one of the two metal sheets for supplying a heat-conducting fluid to the channels and for discharging a heat-conducting fluid from the channels. In this way, the finished housing - as already mentioned - can be integrated into an (existing) circuit for a heat-conducting fluid.to guide the heat-conducting fluid into the channels via the supply line and to discharge it from the channels again via the discharge line. This allows for effective temperature control of an (electrical) module located or to be located in the interior of the housing, in particular a battery cell arrangement.

[0017] In this way, a novel housing for a battery cell assembly can be manufactured in a simple and cost-effective manner. A particularly advantageous feature is that the two cover layers made of sheet metal and the intermediate layer made of a shear- and compression-resistant (structural) material are formed in a single operation, which reduces the required effort. If the material in question is a thermoplastic, the aforementioned forming preferably takes place after prior heating of the entire assembly consisting of the two cover layers and the material arranged between them, after the two cover layers and the material have been permanently bonded together, e.g., by gluing.

[0018] In a further development of the housing according to the invention, it can be provided that the at least one housing part has a substantially flat, plate-shaped configuration. Such a flat, plate-shaped housing part can advantageously be used to arrange a battery cell assembly to be temperature-controlled or another (electrical) module to be temperature-controlled, such as an electric motor or the like, in order to achieve the largest possible heat transfer area.

[0019] In a further development of the housing according to the invention, the other housing part can also be provided with a trough- or bowl-shaped configuration. A housing part shaped in this way can easily cover a battery cell assembly or other modules that require temperature control, in particular to protect them from external damage.

[0020] Furthermore, in a further development of the housing according to the invention, it can be provided that the at least one, preferably flat, housing part has a circumferentially closed contact structure in the form of a step or the like, which is designed to cooperate sealingly with an edge of the other, preferably trough-shaped housing part. Such a circumferentially closed contact structure, which can be designed as a continuous step, functions as a type of centering edge, in particular to enable a trough- or bowl-shaped cover housing part to be placed in a defined manner onto the at least one housing part. In addition, a seal can be present in the region of the contact structure on one and / or the other housing part.

[0021] In another embodiment of the housing according to the invention, the cover layers can be made of steel, preferably stainless steel. This material selection has proven particularly advantageous because it imparts the housing with exceptional resistance to external, particularly corrosive, damage.

[0022] In yet another embodiment of the housing according to the invention, the intermediate layer can be formed from a plastic, preferably a thermoplastic, most preferably a polyimide, in particular polymethacrylimide (PMI) or a comparable material. Such a material advantageously has a closed cell structure, a high degree of mechanical stability, high temperature resistance, and good formability after appropriate heating.

[0023] In an advantageous development of the housing according to the invention, it can be provided that the other metal sheet extends essentially in one plane, and in which at least one metal sheet is deformed (structured) to form the channels in such a way that the walls of the channels are oriented at an angle of less than or equal to 45 degrees with respect to the plane. Such a design of the channel walls has proven advantageous because it allows for optimal absorption of shear forces, in particular.

[0024] It has proven advantageous if, in a further development of the housing according to the invention, the cover layers are firmly bonded, preferably glued, to the intermediate layer. This achieves a permanently strong connection between the cover layers and the intermediate layer, resulting in excellent durability of the entire housing.

[0025] Finally, in a further development of the housing according to the invention, it can be provided that the metal sheets are also connected to one another in the areas between the channels, preferably by a material bond, most preferably by welding. This results in a permanent, defined shape of the channels. Furthermore, such a design has advantages with regard to the manufacturability of the housing according to the invention.

[0026] A preferred development of the battery cell arrangement according to the second aspect of the invention comprises storage and conveying means for the heat conduction fluid for providing the heat conduction fluid, for supplying the heat conduction fluid to the channels, and for discharging the heat conduction fluid from the channels. In this way, the housing and its channels are integrated into a circuit for the heat conduction fluid, so that heat can be dissipated from the interior of the housing or from the battery cell arrangement in a process-reliable manner. Furthermore, the housing can advantageously also have at least one electrical connection for contacting the battery cell arrangement.

[0027] In an advantageous development of the method according to the invention according to the third aspect of the invention, it can be provided that at least one of the metal sheets is provided with a structure, so that channels for a heat-conducting fluid for dissipating heat from the housing are formed between the two metal sheets, by introducing a fluid under pressure between the metal sheets between interconnected regions of the metal sheets in order to deform at least one of the metal sheets, while preferably at least one of the metal sheets, most preferably the other metal sheet, is supported against a compressive force of the fluid.

[0028] The integral connection between the two metal sheets allows the channels to be geometrically predefined and then formed in a technically simple manner by introducing a pressurized fluid between the metal sheets. Preferably, at least one of the metal sheets can be supported against the pressure of the fluid, for example, to achieve a flat, level configuration for this one metal sheet. Additionally or alternatively, the other metal sheet can also be supported to achieve a desired structuring of the channels. This support is preferably achieved by providing a suitable tool.

[0029] The invention is summarized below using a specific exemplary embodiment. It accordingly comprises the integral construction of a battery housing (housing for a battery cell arrangement) with a sandwich structure (cover layers and intermediate layer) and integrated battery cooling (channels).

[0030] A possible housing structure comprises (from outside to inside) a first cover layer, preferably a thin-walled steel sheet, a core made of the aforementioned material, a so-called cooling layer in the form of a thin-walled metal / steel sheet, corrugated or structured, and a second metal sheet (preferably a thin-walled steel sheet). The two metal sheets together form a second cover layer.

[0031] All layers are preferably connected to each other in such a way that shear and compressive forces can be transmitted.

[0032] The preferred manufacturing procedure is as follows: 1. Introduction of hydraulic connections into the second cover layer, i.e. the second metal sheet; 2. Welding / joining the two metal sheets of the second cover layer in the required cooling channel pattern, whereby the geometry of the weld / joining requires a corresponding course of the channels; 3. Surface treatment (cleaning / roughening, e.g. corona treatment); 4. Stacking of the structure including adhesive application for the purpose of joining the cover layers and core; 5. Heating of all components to forming temperature; 6. Thermoplastic forming of the core and forming of the cover layers (together); 7. Hydraulic forming of the (cooling) channels with a closed (tool) cavity into the core, i.e. into the relevant material, by applying (fluid) pressure to the hydraulic connections. 8. Crosslinking of the adhesive under suitable temperature influence; 9. Demolding; 10.Trimming / flanging of the cover layers to ensure a secure connection at the edges.

[0033] It is also possible to form the components (layers) individually or to form only the metal sheets beforehand if the thermoformable core cannot absorb the forming forces of the steel sheets. Alternatively, aluminum or another cover layer material, or a combination of different materials, can be used.

[0034] Furthermore, the (cooling) channel structure in the housing wall can be designed in such a way that the fluid inlet and outlet (supply line and drain) are routed outward through the core material, which facilitates connection to a circuit for the heat-conducting fluid, in particular the temperature control circuit of a vehicle. Openings through the housing for cables for control and power supply and discharge are also advantageously provided.

[0035] In addition, a pressure in the interior of the housing can be equalized via the heat conduction fluid between the interior and the outside via a large-area cooling channel at a mechanically low-stress location of the housing by elastic deformation of the inner cover layer, i.e. the metal sheet in question, in the direction of the fluid or inwards (towards the interior of the housing).

[0036] The present invention provides extensive functional integration, including tightness / leakage resistance, corrosion protection (especially when using a suitable steel), prevention of water absorption (compared to plastic housings), fire protection, resistance to intrusion (crash), thermal insulation, rigidity / damping and installation space reduction through cooling integrated into the supporting structure.

[0037] Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the drawings. Fig. 1 shows a section through a housing according to the invention for a battery cell arrangement; Fig. Figure 2 shows an enlarged (detail) sectional view of one side of the housing according to Fig. 1; Fig. 3 shows a (detail) sectional view of the other side of the housing 1 according to Fig. 1; Fig. 4 shows a section through the housing according to Fig. 1 with exemplary arrangement of battery cells; Fig. 5 shows the housing according to Fig. 4 in various sections; and Fig. 6 shows the same housing as in Fig. 5 rotated slightly.

[0038] In Fig. 1, reference numeral 1 shows a housing according to the invention for a battery cell arrangement in section, as it can be used in particular for accommodating a traction battery for an electrically powered motor vehicle. The housing 1 comprises a first housing part 2, which is bowl-shaped or trough-shaped in the manner of a lid. In addition, the housing 1 comprises a second housing part 3, which is essentially flat in the form of a plate. The first housing part 2 and the second housing part 3 are detachably connected or connectable to one another, which connection is secured by means of peripheral pins or bolts, of which Fig. 1 at reference numeral 4, only two are shown as examples. The bolts at reference numeral 4 can additionally or alternatively also be used for mounting the housing 1 in a vehicle (not shown). The smaller screws 4a next to them then serve to close the housing 1. Between the first housing part 2 and the second housing part 3, a housing interior 5 is formed, which is suitable for accommodating a number of battery cells or another (electrical) module, as will be explained below with reference to Fig. 4 to 6 are shown in more detail.

[0039] The two housing parts 2, 3 basically have the following structure: They are formed from a first cover layer 2a, 3a made of sheet metal and a second cover layer 2b, 3b made of sheet metal, preferably each made of (stainless) steel. Between the first cover layer 2a, 3a and the second cover layer 2b, 3b is an intermediate layer 2c, 3c or a core made of a shear- and compression-resistant, formable (plastic) material, which material is permanently bonded, in particular glued, to the cover layers 2a, 2b, 3a, 3b. In the lower, substantially flat housing part 3, the upper cover layer 3a is in turn formed from two superimposed or adjacent metal sheets 3aa, 3ab, of which one, namely the lower 3ab, has a structure, whereby channels 6 for a heat conduction fluid (not shown) for dissipating heat from the housing 1 are formed between the two metal sheets 3aa, 3ab.

[0040] When a heat conduction fluid flows through the channels 6, it can absorb heat from the housing interior 5 or from a battery cell arrangement (not shown) arranged therein due to the heat-conducting property of the overlying metal sheet 3aa and dissipate it to the outside of the housing 1. For this purpose, the housing 1 has at least one supply line and at least one discharge line for a heat conduction fluid, which supply line or discharge line is in fluidic connection with the channels 6. This will be discussed further below with reference to Fig. 3. The edge areas of the housing parts 2, 3 can be enclosed by suitable profile elements 7.

[0041] Fig. 2 shows an enlarged (detail) sectional view of the structure of the housing 1 according to Fig. 1 in more detail. The formation of channels 6 is particularly clearly visible here. Fig. 2 continues to remove, walls 6a of the channels 6 run at an angle α less than or equal to 45° with respect to the flat metal sheet 3aa, which is advantageous for stability reasons.

[0042] How to Fig. 2 is still removed, the housing part 3 has a circumferential step 3d, also called a contact structure, which serves as a centering aid for the attached upper housing part 2 by mechanically interacting with the latter in a bending area 2d, also called edge, of the upper housing part 2.

[0043] Fig. 3 shows a (detail) sectional view of the opposite Fig. 2 other side of the housing 1 according to Fig. 1. Here, a supply line 8 or a corresponding (VDA) connection is additionally shown, which is in operative connection with conveying means 9 and storage means 10 for a heat conduction fluid. Furthermore, the supply line 8 is in fluidic operative connection with a channel 6', which is designed corresponding to the channels 6 and is in fluidic operative connection with them. At reference number 6" a further channel is shown, which communicates with a discharge line (not shown) for the heat conduction fluid. Advantageously, the said discharge line is in operative connection with the storage means 10 for the heat conduction fluid, which in Fig. 3 is also not explicitly shown, but is shown only schematically by means of a dashed line. In this way, heat-conducting fluid can flow from the storage means 10 via the conveying means 9 through the supply line 8 and the channel 6' into the channels 6 and thus temper, in particular cool, an object located in the interior 5 of the housing 1 before returning to the storage means 10 via the channel 6". The temperature control circuit thus formed can comprise further elements, e.g., heat exchangers, which are not shown here.

[0044] The housing 1 is preferably manufactured as follows: First, hydraulic connections are introduced into the cover layer 3a of the housing part 3, which has two metal sheets 3aa, 3ab. These connections (not shown) are preferably formed in one of the metal sheets 3aa, 3ab and open into an area between the metal sheets 3aa, 3ab. Then, the two metal sheets 3aa, 3ab are welded in the required cooling channel pattern, with the geometry of the weld determining a corresponding course of the channels 6. This is followed by a surface treatment of the metal sheets 3aa, 3ab or, in general, of the cover layers 2a, 2b, 3a, 3b (cleaning / roughening, e.g., corona treatment) - also for the housing part 2. The assembly is then stacked, including the application of adhesive to bond the cover layers 2a, 2b, 3a, 3b and the core material 2c, 3c. All components are then heated to the forming temperature (of the core material).Subsequently, thermoplastic forming of the core 2c, 3c and forming of the cover layers 2a, 2b, 3a, 3b can take place together. The (cooling) channels 6 on the housing part 3 are then hydraulically formed into the core 3c, i.e. into the material in question, with the (tool) cavity (not shown) closed, by introducing a pressurized forming fluid via the hydraulic connections mentioned. The upper metal sheet 3aa preferably rests against a suitable (flat) tool so that it remains essentially flat. A tool can be provided for the lower metal sheet 3ab, the shape of which corresponds to the desired channel shape. In this context, step 3d can also be carried out. The adhesive is then crosslinked under suitable temperature influences. The manufacturing process ends with demolding of the finished housing parts 2, 3 from the relevant forming tool.Afterwards, the cover layers 2a, 2b or 3a, 3b can be trimmed or flanged in order to obtain a secure connection at the edges.

[0045] In Fig. 4 basically shows the same housing 1 as in the Fig. 1 to 3, however, reference numeral 11 now also shows battery cells, which are arranged as a battery cell array in the housing interior 5 and are in thermally conductive connection with the upper metal sheet 3aa of the lower housing part 3. In this way, heat from the battery cells 11 can be dissipated from the housing 1 via the channels 6.

[0046] The Fig. 5 and Fig. 6 show further perspective views of the object from Fig. 4, so there is no need to discuss this further. The course of the channels 6, in particular according to Fig. 5 and Fig. 6 is shown only as an example and in practice is not limited to the geometry shown.

Claims

[1] Housing (1) for a battery cell arrangement, in particular for use in an electrically driven motor vehicle, comprising: at least one first housing part (2); and at least one second housing part (3), which second housing part (3) is or can be detachably connected to the first housing part (2); in which, in a connected state, a housing interior (5) for accommodating a number of battery cells (11) is formed between the first housing part (2) and the second housing part (3); in which at least one of the two housing parts (2, 3) has the following structure: a first cover layer (2a, 3a) made of sheet metal; a second cover layer (2b, 3b) made of sheet metal; an intermediate layer (2c, 3c) arranged between the first cover layer (2a, 3a) and the second cover layer (2b, 3b) made of a shear and compression-resistant, formable material, which material is permanently connected to the cover layers (2a, 2b, 3a, 3b); in which at least one of the cover layers (3a) is formed from at least two adjacent metal sheets (3aa, 3ab), of which at least one (3ab) has a structure, so that channels (6, 6', 6") for a heat-conducting fluid for dissipating heat from the housing (1) are formed between the two metal sheets, in which a supply line (8) and a discharge line are formed on at least one of the two metal sheets (3aa) for supplying a heat conduction fluid to the channels (6, 6', 6") and for discharging a heat conduction fluid from the channels (6, 6', 6"). [2] Housing (1) according to claim 1, wherein the at least one housing part (3) has a substantially flat, plate-shaped configuration. [3] Housing (1) according to claim 2, wherein the other housing part (2) has a trough- or bowl-shaped design. [4] Housing (1) according to claim 2 or 3, wherein the at least one housing part (3) has a circumferentially closed contact structure (3d) which is designed to cooperate with an edge (2d) of the other housing part (2) in a centering and / or sealing manner. [5] Housing (1) according to one of claims 1 to 4, wherein the cover layers (2a, 2b, 3a, 3b) are formed from steel, preferably from stainless steel. [6] Housing (1) according to one of claims 1 to 5, wherein the intermediate layer (2c, 3c) is formed from a plastic, preferably a thermoplastic, most preferably a polyimide, in particular polymethacrylimide, PMI. [7] Housing (1) according to one of claims 1 to 6, in which the other metal sheet (3aa) extends substantially in a plane and in which the at least one metal sheet (3ab) is deformed for the purpose of forming the channels (6, 6', 6") in such a way that walls (6a) of the channels (6, 6', 6") are oriented at an angle (α) of less than or equal to 45 degrees with respect to the plane. [8] Housing (1) according to one of claims 1 to 7, in which the cover layers (2a, 2b, 3a, 3b) are integrally connected, preferably glued, to the intermediate layer (2c, 3c). [9] Housing (1) according to one of claims 1 to 8, in which the metal sheets (3aa, 3ab) are connected to one another in regions between the channels (6, 6', 6"), preferably by means of a material bond, most preferably by welding, soldering or adhesive bonding. [10] Tempered battery cell assembly, comprising: a housing (1) according to one of the preceding claims; at least one battery cell (11) accommodated in the interior (5) of the housing (1); a heat conducting fluid which is filled into the channels (6, 6', 6"); in which the battery cell (11) is in heat-conducting contact with one (3aa) of the two metal sheets (3aa, 3ab), preferably with a substantially planar (3aa) of the two metal sheets (3aa, 3ab). [11] Battery cell arrangement according to claim 10, with storage and conveying means (10, 9) for the heat conduction fluid for providing the heat conduction fluid, for supplying the heat conduction fluid to the channels (6, 6', 6") and for discharging the heat conduction fluid from the channels (6, 6', 6"). [12] Method for producing a housing (1) for a battery cell arrangement, in particular for use in an electrically driven motor vehicle, comprising: Producing at least one first housing part (2); Producing at least one second housing part (3), which second housing part (3) can be detachably connected to the first housing part (2); so that between the first housing part (2) and the second housing part (3), in a connected state, a housing interior (5) for accommodating a number of battery cells (11) is formed; and preferably detachably connecting the two housing parts (2, 3) to the housing (1); in which at least one of the two housing parts (2, 3) is manufactured as follows: Providing a first cover layer (2a, 3a) made of sheet metal; Providing a second cover layer (2b, 3b) made of sheet metal; Arranging an intermediate layer (2c, 3c) made of a shear and compression stiff, formable material, preferably a thermoplastic, between the first cover layer (2a, 3a) and the second cover layer (2b, 3b); permanently connecting the intermediate layer (2c, 3c) to the cover layers (2a, 3a, 2b, 3b); characterized by , that at least one of the cover layers (3a) is made of at least two superimposed metal sheets (3aa, 3ab), which metal sheets (3aa, 3ab) are firmly connected to one another in regions, preferably by means of a material bond, most preferably by welding; the arrangement of cover layers (2a, 3a, 2b, 3b) and intermediate layer (2c, 3c) is formed into the respective housing part (2, 3), preferably after prior heating; and on at least one (3aa) of the two metal sheets (3aa, 3ab) a supply line (8) and a discharge line are formed for supplying a heat conduction fluid to the channels (6, 6', 6") and for discharging a heat conduction fluid from the channels (6, 6', 6"). [13] Method according to claim 12, in which at least one of the metal sheets (3ab) is provided with a structure so that channels (6, 6', 6") for a heat-conducting fluid for dissipating heat from the housing (1) are formed between the two metal sheets (3aa, 3ab), by introducing a fluid under pressure between the metal sheets (3aa, 3ab) between interconnected regions of the metal sheets (3aa, 3ab) in order to reshape at least one (3ab) of the metal sheets (3aa, 3ab), while preferably at least one (3aa) of the metal sheets (3aa, 3ab), most preferably the other metal sheet (3aa), is supported against a compressive force of the fluid.

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