Battery housing with cooling device, battery with a battery housing and method for producing a battery housing

Abstract

The present invention relates to a battery housing (10) for accommodating at least one battery component, wherein the battery housing (10) has an outer wall (20) at least partially enclosing a receiving volume (11) and a cooling device (30). The cooling device (30) has a base plate (40) having a first connecting surface (42) and a cover plate (50) having a second connecting surface (52), wherein the connecting surfaces (42, 52) of the base plate (40) and the cover plate (50) are integrally connected to one another at least in an edge region (60) extending circumferentially around the cooling device (30) in such a way that a fluid channel (70) for conducting a cooling fluid is formed between the base plate (40) and the cover plate (50).The cooling device (30) is connected to the battery housing (10) in such a way that the entire edge region (60) of the cooling device (30) is arranged within the outer wall (20) of the battery housing (10), and the cooling device (30) forms the housing base (12) of the battery housing (10). The invention further relates to a battery comprising a battery housing (10). Finally, the invention relates to a method for producing a battery housing (10).

Description

The present invention relates to a battery housing having a cooling device, a battery having a battery housing and a method for producing a battery housing.In batteries, for example in traction batteries or storage batteries (current storages) for solar installations and / or wind turbines, for example, large charging and discharging currents cause large thermal losses, which lead to heating of battery cells and / or battery modules of the battery. In order to protect the batteries from thermal damage and achieve high efficiency, it is important to maintain them in a desired temperature range. Therefore, heat must be dissipated from the battery. In order to ensure sufficient heat dissipation, battery cells of batteries are cooled during operation, i.e. during charging and / or discharging. In this case, different types of cooling-for example liquid cooling-are currently used.Furthermore, for the same reasons mentioned above, it may be advantageous to heat the battery cells at low external temperatures.In systems for liquid cooling, in principle, an active or passive circulation of the heat transport medium can take place in order to dissipate the emitted heat by convection. In the passive circulation, the heat transport medium is moved exclusively by a temperature gradient within the heat transport medium, while in an active circulation the heat transport medium is actively circulated in order to remove the heat from the battery cells.In systems for liquid cooling known from the prior art, sealing points are frequently arranged in the receiving volume of battery housings. As a result, a short circuit of battery cells arranged in the receiving volume can occur when cooling liquid runs out of the sealing points and comes into contact with the battery cells.One approach to avoiding contact between battery cells and cooling liquid is to provide no sealing points in the receiving volume of battery housings. Battery housings formed in this way are produced in a plurality of production steps, in which, for example, a cooling device made of metal is encapsulated by injection molding with a thermoplastic material. To increase the mechanical stability of the battery housings and to avoid sealing points in the receiving volume of battery housings, the cooling devices are partially encapsulated and overmolded. However, the process loads caused by temperature and pressure during overmolding and overmolding of the cooling device frequently result in cavities of the cooling device, for example fluid channels, being collapsed under the process loads and irreversibly mechanically deformed. This leads to high production costs due to production of defective parts, up to the cost-effective manufacture of such battery housings.The object of the present invention is to provide a battery housing with a cooling device with improved protection against leakage of cooling fluid and at the same time improved mechanical properties, in particular improved resistance to temperature and pressure loads during production.The object underlying the present invention is achieved by a battery housing having the features of claim 1. Advantageous embodiments of the battery housing are described in the claims dependent on claim 1.More specifically, the object underlying the present invention is achieved by a battery housing having an outer wall at least partially enclosing a receiving volume and a cooling device. The cooling device has a base plate having a first connecting surface and a cover plate having a second connecting surface, wherein the connecting surfaces of the base plate and the cover plate are connected to one another in a materially bonded manner at least in an edge region formed circumferentially around the cooling device in such a way that a fluid channel for conducting a cooling fluid is formed between the base plate and the cover plate. The cooling device is connected to the battery housing in such a way that the entire edge region of the cooling device is arranged within the outer wall of the battery housing, and the cooling device forms at least a part of the housing base of the battery housing, preferably the entire housing base of the battery housing. The battery housing has at least one inner wall connected to the outer wall, wherein the inner wall extends between two preferably opposite wall sections of the outer wall, and the inner wall of the battery housing is in contact at least in sections with a cooling surface of the cooling device facing the receiving volume. Preferably, the inner wall of the battery housing is connected at least in sections to the cooling surface of the cooling device facing the receiving volume.The battery housing according to the invention has the advantage that efficient cooling of battery components (e.g. battery cells and / or battery modules) mounted in the battery housing is made possible. Furthermore, the battery housing according to the invention has the advantage that it has improved protection against cooling fluid leaking out of the cooling device. Because the entire edge region of the cooling device is arranged within the outer wall of the battery housing, cooling fluid cannot enter the receiving volume. Battery components which can be arranged in the receiving volume of the battery housing according to the invention are thus protected from the cooling fluid, so that there is improved protection against a short circuit of the battery components. Finally, the battery housing according to the invention has an improved mechanical strength due to the inner wall.The inner wall can also be referred to as a stiffening wall or as a supporting wall.The inner wall is arranged in the receiving volume of the battery housing.The inner wall can be connected to the outer wall in a materially integral manner. Preferably, the inner wall is formed monolithically with the outer wall.The inner wall can have the same height extension as the outer wall. The inner wall preferably has a smaller height extension than the outer wall. In this case, the inner wall can also be referred to as a rib or a flat rib.A battery housing formed in this way has the advantage that the battery housing, in particular the outer wall and the inner wall, can / are produced in one production step.The inner wall can enclose an angle of less than or equal to 90° with the outer wall. The inner wall can enclose an angle of less than or equal to 45° with the outer wall.A wall section of the outer wall can be a section of the outer wall running in a straight line. Alternatively or additionally, a wall section of the outer wall can also be a corner region of the outer wall.Preferably, the inner wall extends orthogonally from a first wall section of the outer wall to a second wall section of the outer wall opposite the first wall section of the outer wall.The first connecting surface of the base plate and / or the second connecting surface of the cover plate can / can be formed from a metal.The cooling surface of the cover plate may be formed of a metal.A battery housing formed in this way has the advantage that improved efficient cooling of battery components mounted in the battery housing is made possible.The base plate may have a bottom side arranged opposite the first connecting surface of the base plate. The bottom side may be formed of a metal.The connecting surfaces of the base plate and the cover plate are arranged opposite to each other.The connection surfaces of the base plate and the cover plate may be welded together.A battery housing formed in this way has the advantage that it has an even improved protection against the outflow of cooling fluid.Preferably, the joint surfaces of the base plate and the cover plate are welded together by means of contact welding. A battery housing formed in this way has the advantage that it can be produced in a simplified manner.Contact welding is known to those skilled in the art. Contact welding is a solid state welding method in which joining takes place without melting the two components to be welded at the intersection of the two components to be welded.Alternatively or additionally, the connecting surfaces of the base plate and the cover plate are welded to one another by means of laser welding.A battery housing formed in this way has the advantage that it has an even improved protection against the outflow of cooling fluid.The fluid channel can be fluidically connected to an inlet connection and an outlet connection.The underside of the base plate, which underside is arranged opposite the connecting surface of the base plate, can be designed to be curved, forming the fluid channel.A battery housing formed in this way has the advantage that an increased cooling capacity of the cooling device is made possible.The feature according to which the bottom surface of the base plate bulges downward may also be expressed such that the bottom surface of the base plate has at least one protrusion. In other words, the underside of the base plate is preferably not flat.The fluid channel can be formed meander-shaped or spiral-shaped between the base plate and the cover plate.A battery housing formed in this way has the advantage that, owing to the longer cooling path of the fluid channel, efficient cooling of battery components arranged in the battery housing is made possible in an improved manner.The edge region formed circumferentially around the cooling device is a component of the cooling device. In other words, the edge region formed circumferentially around the cooling device is connected to the cooling device without gaps.The edge region formed circumferentially around the cooling device can be angled at least in sections with respect to the cooling surface of the cover plate.A battery housing formed in this way has the advantage that it has an even improved protection against the outflow of cooling fluid. Due to the edge region angled with respect to the cooling surface, the battery housing, in addition to the materially bonded connection between the first connecting surface of the base plate and the second connecting surface of the cover plate, has additional protection by the shaping of the edge region from leaking of cooling fluid. Furthermore, by the angled configuration of the edge region of the cooling device, the edge region can be enclosed in an improved manner by the material which forms an outer wall of the battery housing. Finally, the bending and torsional rigidity of the battery housing is improved by the edge region angled with respect to the cooling surface.The angled edge region and the cooling surface can enclose an angle of greater than or equal to 90° with respect to one another.The angled edge region formed circumferentially around the cooling device can be angled with respect to the cooling surface by bending the edge region. In other words, the angled edge region can be monolithically connected to the cooling device.A battery housing formed in this way has the advantage that the battery housing can be produced in a simplified manner.Preferably, the battery housing is designed such that the inner wall extends between two opposite wall sections of the outer wall such that the receiving volume is divided into two or more subvolumes.A battery housing formed in this way has the advantage that battery components can be arranged with an increased accuracy of fit and a more secure fit in the receiving volume or in the subvolumes of the receiving volume of the battery housing. This improves contact between the battery components and a cooling surface of the cooling device, so that the battery housing enables an improved efficient cooling of the battery components.The inner wall can extend between two opposite wall sections of the outer wall in such a way that the receiving volume is divided into four or more subvolumes.The subvolumes may be subvolumes of equal size.The battery housing is preferably designed in such a way that the battery housing has a reinforcing structure arranged on the cooling surface of the cooling device, wherein the reinforcing structure has at least one first connecting section, and wherein the reinforcing structure is connected to the battery housing in such a way that the first connecting section is arranged at least partially within the inner wall. Preferably, the entire first connecting portion is arranged within the inner wall.A battery housing formed in this way has the advantage that the battery housing has an increased resistance to the fluid channels collapsing during the production of the battery housing. As a result of the thermal and mechanical process loads acting on the fluid channels of the cooling device during the production of the battery housing, in particular during the overmolding and overmolding of the cooling device, the fluid channels can be irreversibly mechanically deformed both on the cooling surface of the cover plate and on the underside of the base plate. A reinforcing structure arranged on the cooling surface increases the moment of inertia of the relevant cross-sectional area, so that the battery housing has an increased resistance to a collapse of the fluid channels during the production of the battery housing.The first connecting portion of the reinforcing structure may have an angle of greater than 0° to the cooling surface of the cooling device.A battery housing formed in this way has the advantage that the material forming the inner wall can flow around the first connecting section in an improved manner when the battery housing is produced. As a result, the connection between the first connecting portion and the inner wall can be improved, so that the battery housing has improved mechanical strength.The reinforcing structure may be welded to the cooling surface of the cooling device.Preferably, the battery housing is formed in such a way that the reinforcing structure has a second connecting portion, wherein the second connecting portion is angled with respect to the first connecting portion, and wherein the reinforcing structure is connected to the cooling surface by means of the second connecting portion.A battery housing formed in this way has the advantage that the battery housing has an even greater resistance to the fluid channels collapsing during the production of the battery housing. A second connecting section, which is arranged at an angle to the first connecting section, increases the moment of inertia of the relevant cross-sectional area, so that the battery housing has an even greater resistance to the fluid channels collapsing during the production of the battery housing.The reinforcing structure may have an L-profile, a T-profile or a U-profile. The first connecting portion and the second connecting portion may form the L-profile and / or the T-profile.A battery housing formed in this way has the advantage that the battery housing has an even greater resistance to the fluid channels collapsing during the production of the battery housing.The reinforcing structure may include a third connecting portion disposed substantially parallel to the first connecting portion and connected to the second connecting portion such that the first connecting portion, the second connecting portion, and the third connecting portion form the U-profile.The first connecting portion and / or the second connecting portion can / can have a thickness extension of greater than or equal to 1 mm.The first connecting portion and / or the second connecting portion can / can have a width extension of less than or equal to 10 mm, preferably of less than or equal to 5 mm.The battery housing is preferably designed in such a way that the first connecting section has through-openings which are filled by the material forming the inner wall.A battery housing formed in this way has the advantage that it can be produced in a simplified manner. In particular, material forming the inner wall of the battery housing can flow through the through openings of the first connecting portion of the reinforcing structure while the battery housing is being manufactured. This makes it possible to achieve an improved connection between the cooling device and the inner wall of the battery housing.A free cross section of the through-openings can be circular, rectangular, oblong hole-shaped or diamond-shaped. The free cross section can have a diameter which is as large as a thickness extension of the inner wall of the battery housing.The through openings preferably have equidistant distances from one another. The distance between two passage openings is preferably 2.5 times a thickness extension of the inner wall of the battery housing to which the cooling device is connected.A battery housing formed in this way has the advantage that it has an improved connection between the inner wall and the cooling device. As a result, the battery housing has improved mechanical strength.The battery housing is preferably designed in such a way that a supporting structure is arranged in a free cross section of the fluid channel.A battery housing formed in this way has the advantage that the battery housing has an increased resistance to collapse of the fluid channels during the production of the battery housing. The supporting structure arranged in the fluid channel counteracts the mechanical loads during the production of the battery housing, so that a collapsing of the fluid channel can be avoided. Furthermore, a directed flow of cooling fluid in the fluid channel can be assisted by the supporting structure, so that the cooling capacity of the cooling device is improved.Preferably, the support structure does not extend over an entire longitudinal extent of the fluid channel.The battery housing is preferably designed in such a way that the support structure has a wave shape or a rectangular shape in a cross section.A battery housing formed in this way has the advantage that the battery housing has an even greater resistance to collapse of the fluid channels during the production of the battery housing.The battery housing is preferably designed in such a way that a free cross section of the fluid channel has a width extension of less than or equal to 21 mm.A battery housing formed in this way has the advantage that the battery housing has an increased resistance to collapse of the fluid channels during the production of the battery housing. By reducing the width extension of the free cross section, an increased area moment of inertia of the relevant cross-sectional area can be achieved. This can increase the resistance to collapsing of the fluid channels.The free cross section of the fluid channel can have a width extension of less than or equal to 19 mm, preferably of less than or equal to 15 mm, further preferably of less than or equal to 12 mm.The battery housing is preferably designed in such a way that a channel dividing device is arranged in the fluid channel, which dividing a free cross section of the fluid channel at least partially into two free sub-cross sections separated from one another.A battery housing formed in this way has the advantage that the battery housing has an increased resistance to collapse of the fluid channels during the production of the battery housing. By means of a channel dividing device, the width extension of the free cross section of the fluid channel can be reduced, so that in turn an increased area moment of inertia of the relevant cross-sectional area can be achieved. This can increase the resistance to collapsing of the fluid channels.The channel dividing device can be arranged in the fluid channel in such a way that the channel dividing device divides a free cross section into two free sub-cross sections of equal size which are separated from one another.The channel dividing device can be arranged in the fluid channel in such a way that the channel dividing device has a distance from a wall of the fluid channel in the width extension direction of the fluid channel of greater than or equal to 21 mm.The channel dividing device can be arranged in the fluid channel in such a way that the channel dividing device is at a distance of greater than or equal to 21 mm in the width extension direction of the fluid channel from two mutually opposite walls of the fluid channel.The channel dividing device can be arranged in the region of the inlet connection and / or in the region of the outlet connection in a free cross section of the fluid channel.A battery housing formed in this way has the advantage that a flow resistance of the fluid channel in the region of the inlet connection and / or of the outlet connection is reduced.The underside of the base plate can be curved in the region of the fluid channel in the direction of the cover plate, forming the channel dividing device, and be connected to the cover plate.A battery housing formed in this way has the advantage that the battery housing can be produced in a simplified manner. In particular, the cooling device of the battery housing can be produced with a reduced number of production steps.The channel dividing device can have a width extension of greater than or equal to 3 mm, preferably a width extension of greater than or equal to 5 mm and particularly preferably a width extension of greater than or equal to 7 mm.The battery housing is preferably designed in such a way that the edge region encircling the cooling device has through-openings which are filled by the material forming the outer wall.The battery housing of corresponding design has the advantage that it can be produced in a simplified manner. In particular, material forming the outer wall of the battery housing can flow through the through-openings of the edge region while the battery housing is being produced. This makes it possible to achieve an improved connection between the cooling device and the outer wall of the battery housing.A free cross section of the through-openings can be circular, rectangular, oblong hole-shaped or diamond-shaped. The free cross section can have a diameter which is as large as a thickness extension of the outer wall of the battery housing to which the cooling device is connected.The through openings preferably have equidistant distances from one another. The distance between two passage openings is preferably 2.5 times a thickness extension of the outer wall of the battery housing to which the cooling device is connected.A battery housing formed in this way has the advantage that it has an improved connection between the outer wall and the cooling device. As a result, the battery housing has an even improved protection against leakage of cooling fluid.The battery housing is preferably designed in such a way that the cover plate has a thickness extension of greater than or equal to 0.8 mm, and / or the base plate has a thickness extension of greater than or equal to 0.6 mm.A battery housing formed in this way has the advantage that the battery housing has an increased resistance to the fluid channels collapsing during the production of the battery housing.The cover plate can have a thickness extension of greater than or equal to 0.9 mm, preferably of greater than or equal to 1.0 mm.The base plate can have a thickness extension of greater than or equal to 0.7 mm, preferably of greater than or equal to 0.8 mm.It is a further object of the present invention to provide a battery with a cooling device with improved protection against leakage of cooling fluid and at the same time improved mechanical properties, in particular improved resistance to temperature and pressure loads during production.The object underlying the present invention is achieved by a battery having the features of claim 12.More specifically, the object underlying the present invention is achieved by a battery having at least one battery component, wherein the battery has a battery housing according to one of the preceding claims, and wherein the at least one battery component is arranged in the receiving volume of the battery housing and is in contact with the cooling surface of the cooling device.The battery according to the invention has the advantage that efficient cooling of battery components (e.g. battery cells and / or battery modules) of the battery is made possible. Furthermore, the battery according to the invention has the advantage that it has improved protection against cooling fluid leaking out of the cooling device. Because the entire edge region of the cooling device is arranged within the outer wall of the battery housing, cooling fluid cannot enter the receiving volume. Thus, the battery components of the battery are protected from the cooling fluid, so that there is improved protection against a short circuit of the battery. Finally, the battery according to the invention has an improved mechanical strength due to the inner wall of the battery housing.The present invention is further based on the object of providing a method for producing a battery housing described above.The object underlying the present invention is achieved by a method having the features of claim 13.Advantageous embodiments of the method are described in the claims dependent on claim 13.More specifically, the object underlying the present invention is achieved by a method for producing a battery housing described above, wherein the method has the following method steps:providing a mold, preferably an injection mold, wherein the mold has at least two mold parts;providing the cooling device, wherein the cooling device comprises a fluid channel;introducing the cooling device into a first tool part of the forming tool;closing the mold by moving the at least two mold parts toward one another until they are in contact with one another and form a cavity for filling with a thermoplastic material, wherein the cooling device is arranged within the cavity;filling the cavity with a thermoplastic material, so that the entire edge region of the cooling device is surrounded by the material forming the outer wall of the battery housing;opening the forming tool and removing the finished battery housing.The method according to the invention has the advantage that the battery housing, in particular the outer wall and the inner wall of the battery housing, can / are produced in one method step.The method is preferably designed in such a way that the method has the following method steps before the closing of the molding tool:filling the fluid channel of the cooling device with a fluid, preferably with water; andclosing the fluid channel in such a way that the fluid cannot escape from the fluid channel; and wherein the method preferably comprises the following method step before opening the forming tool:emptying the fluid channel of the cooling device.A method embodied in this way has the advantage that increased resistance to collapsing of the fluid channels can be achieved during the production of the battery housing. Because the fluid channels are filled with a fluid before the closing of the two tool halves and before the filling of thermoplastic material into the cavity and the latter remains in the fluid channel, there is no cavity in the cooling device due to the free cross section of the fluid channel, so that the latter is not deformed by the acting mechanical loads.Preferably, the first tool part has a receiving region for receiving the cooling device, wherein the receiving region has, at least in sections, a surface contour corresponding to the underside of the base plate of the cooling device, and wherein the method has the following method step:introducing the cooling device into the first tool part of the molding tool in such a way that the underside of the base plate of the cooling device is in planar surface contact with the surface contour of the receiving region of the first tool part with substantially the entire surface of the underside.A method embodied in this way has the advantage that increased resistance to collapsing of the fluid channels can be achieved during the production of the battery housing. Because the underside of the base plate is in planar contact with the receiving region of the first tool part, forces acting on the fluid channels of the cooling device can be absorbed during production, such that the fluid channels are supported by the first tool part.Further advantages, details and features of the invention are evident below from the explained exemplary embodiments. In this context, the following show in detail: FIG. 1 : a battery housing according to a first embodiment in a perspective view, FIG. 2 : shows a cooling device of the battery housing according to the first embodiment in a perspective view, FIG. 3 : a sectional view of the battery housing according to the first embodiment in the connection region between an edge region of the cooling device and the outer wall, FIG. 4 : a sectional view of the battery housing according to a second embodiment in the region of a fluid channel of the cooling device of the battery housing, FIG. 5 : a sectional view of a battery housing according to a third embodiment in the region of a fluid channel of the cooling device of the battery housing, FIG. 6 : a sectional view of a battery housing according to a fourth embodiment in the region of a fluid channel of the cooling device of the battery housing, FIG. 7 : shows a perspective view of the battery housing according to the fourth embodiment in the region of the fluid channel of the cooling device of the battery housing, and FIG. 8 is a perspective view of a first die part of a forming die for manufacturing the battery case according to the first embodiment.In the description which follows, the same reference numerals designate the same components or the same features, so that a description with respect to a component carried out with respect to a figure also applies to the other figures, so that a repetitive description is avoided. Furthermore, individual features that have been described in connection with an embodiment can also be used separately in other embodiments.FIG. 1 shows a battery housing 10 according to a first embodiment in a perspective view. The battery housing 10 has an outer wall 20 at least partially enclosing a receiving volume 11 and a cooling device 30. The cooling device 30 has a base plate 40 which is not visible in FIG. 1 and has a first connecting surface 42 and a cover plate 50 which has a second connecting surface 52, the second connecting surface 52 likewise not being visible in FIG. 1. The connecting surfaces 42, 52 of the base plate 40 and the cover plate 50 are connected to one another in a materially integral manner at least in an edge region 60 which is not visible in FIG. 1 and is arranged around the cooling device 30, in such a way that a fluid channel 70 which is not visible in FIG. 1 for the passage of a cooling fluid between the base plate 40 and the cover plate 50 is formed. The cooling device 30 is connected to the battery housing 10 in such a way that the entire edge region 60 of the cooling device 30 is arranged within the outer wall 20 of the battery housing 10, and the cooling device forms the housing base 12 of the battery housing 10. The battery housing 10 has at least one inner wall 80 connected to the outer wall 20, which inner wall extends between two opposite wall sections of the outer wall 20, and is connected at least in sections to a cooling surface 51 of the cooling device 30.The inner wall 80 extends between two opposite wall sections of the outer wall 20 in such a way that the receiving volume 11 is divided into two subvolumes 13 of equal size.FIG. 2 shows a cooling device 30 of the battery housing 10 according to the first embodiment in a perspective view. The base plate 40 has a bottom side 41 arranged opposite the first connecting surface 42 not visible in FIG. 2. The lower side 41 of the base plate 40 is designed to bulge out, forming the fluid channel 70.The fluid channel 70 is formed in a meander shape between the base plate 40 and the cover plate 50 and is fluidically connected to an inlet connection 71 and an outlet connection 72.The edge region 60 encircling the cooling device 30 is angled with respect to the cooling surface 51 of the cover plate 50, wherein the angled edge region 60 and the cooling surface 51 enclose an angle of 90° with respect to one another. The edge region 60 running around the cooling device 30 has through-openings 61.FIG. 3 shows a sectional view of the battery housing 10 according to the first embodiment in the connection region between an edge region 60 of the cooling device 30 and the outer wall 20.The connecting surface 42 of the base plate 40 is arranged opposite to the connecting surface 52 of the cover plate 50 and connected thereto. The edge region 60 angled with respect to the cooling surface 51 of the cover plate 50 is arranged completely within the wall 120 of the battery housing 10. The through-openings 61 of the edge region 60 of the cooling device 30 are filled by material of the outer wall 20.FIG. 4 shows a sectional view of a battery housing 10 according to a second embodiment in the region of a fluid channel 70 of the cooling device 30 of the battery housing 10. The support structure 100 has a wave shape in a cross section.FIG. 5 shows a sectional view of a battery housing 10 according to a third embodiment in the region of a fluid channel 70 of the cooling device 30 of the battery housing 10. the battery housing 10 has a reinforcing structure 90 arranged on the cooling surface 51 of the cooling device 30, wherein the reinforcing structure 90 has at least one first connecting portion 91 and the reinforcing structure 90 is connected to the battery housing 10 in such a way that the entire first connecting portion 91 is arranged within the inner wall 80.The reinforcing structure 90 has a second connecting portion 92, wherein the second connecting portion 92 is angled with respect to the first connecting portion 91, and wherein the reinforcing structure 90 is connected to the cooling surface 51 of the cooling device 30 by means of the second connecting portion 92.The first connecting section 91 has through-openings 93 and is penetrated in the region of the through-openings 93 by material of the inner wall 80 of the battery housing 10.FIG. 6 shows a sectional view of a battery housing 10 according to a fourth embodiment in the region of a fluid channel 70 of the cooling device 30 of the battery housing 10. The free sub-cross-sections 74 are of the same size. The channel dividing device 110 is arranged in the fluid channel 70 in such a way that the channel dividing device 110 is in each case at the same distance in the width extension direction of the fluid channel 70 from two mutually opposite walls of the fluid channel 70.FIG. 7 shows a perspective view of the battery housing 10 according to the fourth embodiment in the region of the fluid channel 70 of the cooling device 30 of the battery housing 10. the underside 41 of the base plate 40 is curved in the region of the fluid channel 70 in the direction of the cover plate 50, forming the channel dividing device 110, and is connected to the cover plate 50.FIG. 8 is a perspective view of a first die 120 of a die for manufacturing the battery case 10 according to the first embodiment. The first tool part 120 has a receiving region 121, wherein the receiving region 121 has a surface contour corresponding to the underside 41 of the base plate 40 of the cooling device 30.List of reference characters10 Battery housing 11 Receiving volume 12 Housing base 20 Outer wall (of the battery housing) 30 Cooling device 40 Base plate (of the cooling device) 41 Underside (of the base plate) 42 First connecting surface (of the base plate) 50 Cover plate (of the cooling device) 51 Cooling surface (of the cover plate) 52 Second connecting surface (of the cover plate) 60 Edge region (of the cooling device) 61 Through opening (of the edge region of the cooling device) 70 Fluid channel 71 Inflow connection 72 Outflow connection 73 Free cross section (of the fluid channel) 74 Sub cross section (of the free cross section of the fluid channel) 80 Inner wall (of the battery housing) 90 Reinforcing structure 91 First connecting portion (of the reinforcing structure) 92 Second connecting portion (of the reinforcing structure) 93 Through openings (of the first connecting portion) 100 Supporting structure 110 Channel dividing device 120 First tool part 121 receiving region (of the first tool part)

Claims

Battery housing (10) for accommodating at least one battery component, wherein the battery housing (10) has the following features: - the battery housing (10) has an outer wall (20) at least partially enclosing an accommodation volume (11); - the battery housing (10) has a cooling device (30); - the cooling device (30) has a base plate (40) having a first connecting surface (42) and a cover plate (50) having a second connecting surface (52); - the connecting surfaces (42, 52) of the base plate (40) and of the cover plate (50) are connected to one another in a materially bonded manner at least in an edge region (60) formed encircling the cooling device (30) in such a way that a fluid channel (70) for passing a cooling fluid through is formed between the base plate (40) and the cover plate (50); the cooling device (30) is connected to the battery housing (10) in such a way that the entire edge region (60) of the cooling device (30) is arranged within the outer wall (20) of the battery housing (10); the cooling device (30) forms at least a part of the housing base (12) of the battery housing (10); the battery housing (10) has at least one inner wall (80) connected to the outer wall (20); the inner wall (80) extends between two wall sections of the outer wall (20); and the inner wall (80) of the battery housing (10) is in contact at least in sections with a cooling surface (51) of the cooling device (30) facing the receiving volume (11).Battery housing (10) according to Claim 1, characterized in that the inner wall (80) extends between two opposite wall sections of the outer wall (20) in such a way that the receiving volume (11) is divided into two or more subvolumes (13).Battery housing (10) according to one of the preceding claims, characterized by the following features: - the battery housing (10) has a reinforcing structure (90) arranged on the cooling surface (51) of the cooling device (30); - the reinforcing structure (90) has at least one first connecting section (91); and - the reinforcing structure (90) is connected to the battery housing (10) in such a way that the first connecting section (91) is arranged at least partially within the inner wall (80).Battery housing (10) according to Claim 3, characterized in that the reinforcing structure (90) has a second connecting section (92), wherein the second connecting section (92) is angled with respect to the first connecting section (91), and wherein the reinforcing structure (90) is connected to the cooling surface (51) by means of the second connecting section (92).Battery housing (10) according to either of Claims 3 and 4, characterized in that the first connecting section (91) has through-openings (93) which are filled by the material forming the inner wall (80).Battery housing (10) according to one of the preceding claims, characterized in that a supporting structure (100) is arranged in a free cross section (73) of the fluid channel (70).Battery housing (10) according to Claim 6, characterized in that the supporting structure (100) has a wave shape or a rectangular shape in a cross section.Battery housing (10) according to one of the preceding claims, characterized in that a free cross section of the fluid channel (70) has a width extension of less than or equal to 21 mm.Battery housing (10) according to one of the preceding claims, characterized in that a channel dividing device (110) is arranged in the fluid channel (70), which dividing a free cross section (73) of the fluid channel (70) at least in sections into two free sub-cross sections (74) which are separated from one another.Battery housing (10) according to one of the preceding claims, characterized in that the edge region (60) encircling the cooling device (30) has through-openings (61), which are filled by the material forming the outer wall (20).Battery housing (10) according to one of the preceding claims, characterized by the following features: - the cover plate (50) has a thickness extension of greater than or equal to 0.8 mm; and / or - the base plate (40) has a thickness extension of greater than or equal to 0.6 mm.A battery comprising at least one battery component, wherein the battery comprises the following features: - the battery comprises a battery housing (10) according to one of the preceding claims; and - the at least one battery component is arranged in the receiving volume (11) of the battery housing (10) and is in contact with the cooling surface (51) of the cooling device (30).Method for producing a battery housing (10) according to one of Claims 1 to 11, wherein the method has the following method steps: - providing a moulding tool, preferably an injection moulding tool, wherein the moulding tool has at least two tool parts; - providing the cooling device (30), wherein the cooling device (30) has a fluid channel (70); - introducing the cooling device (30) into a first tool part (120) of the moulding tool; - closing the moulding tool by moving the at least two tool parts towards one another until they are in contact with one another and form a cavity for filling with a thermoplastic material, wherein the cooling device (30) is arranged within the cavity; - filling the cavity with a thermoplastic material, such that the entire edge region (60) of the cooling device (30) is surrounded by the material forming the outer wall (20) of the battery housing (10); opening the forming tool and removing the finished battery housing (10).Method for producing a battery housing (10) according to claim 13, wherein the method comprises the following method steps before the closing of the forming tool: - filling the fluid channel (70) of the cooling device (30) with a fluid, preferably with water; and - closing the fluid channel (70) such that the fluid cannot escape from the fluid channel; and wherein the method comprises the following method step before the opening of the forming tool: - emptying the fluid channel (70) of the cooling device (30).Method for producing a battery housing (10) according to one of Claims 13 or 14, wherein the first tool part (120) has a receiving region (121) for receiving the cooling device, wherein the receiving region (121) has, at least in sections, a surface contour corresponding to the underside (41) of the base plate (40) of the cooling device (30), and wherein the method has the following method step: - introducing the cooling device (30) into the first tool part (120) of the moulding tool in such a way that the underside (41) of the base plate (40) of the cooling device (30) is in planar surface contact with the surface contour of the receiving region of the first tool part (120) with substantially the entire surface of the underside (41).

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