Battery carrier die-cast part and method for producing a battery carrier die-cast part

Abstract

The invention relates to a battery carrier die-cast part for at least partly delimiting a receiving chamber (4) for at least one battery cell and / or at least one battery module which is used as a drive energy storage device for an electrically powered vehicle, wherein the battery carrier die-cast part (2) has at least one portion (8, 10) which extends substantially along the longitudinal axis, and the portion (8, 10) has a substantially closed contour (20). The substantially closed contour (20) comprises a cavity (38), in particular the contour encloses a cavity (38), and the closed contour (20) extends integrally around the cavity (38). The invention likewise relates to a method for producing a battery carrier die-cast part.

Description

[0001] Battery carrier die-cast part and method for producing a battery carrier die-cast part

[0002] The invention relates to a battery carrier die-cast part for at least partially defining a receiving space for at least one battery cell serving as a drive energy storage device for an electrically powered vehicle and / or at least one battery module. The invention also relates to a method for producing a battery carrier die-cast part, in particular an aforementioned battery carrier die-cast part, from a light metal melt, in particular from a melt of an aluminum alloy, by high-pressure casting.

[0003] Electrically powered vehicles of the type in question here typically carry a plurality of battery modules and / or battery cells, which serve as propulsion energy storage devices and provide the electrical energy required for ferry operation. In particular, an electrically powered vehicle of the type in question here is an electric car, which is essentially powered exclusively by an electric motor. Alternatively, the aforementioned battery carrier die-cast part can also be used in a hybrid vehicle, which has an internal combustion engine in addition to an electric motor.

[0004] Since battery modules and / or battery cells are usually very heavy, their placement in the vehicle not only places high demands on the vehicle's supporting structure from a static point of view, but also influences the dynamic forces occurring during ferry operation.

[0005] With regard to driving performance, placing the individual battery modules and / or individual battery cells in the floor area of ​​the vehicle has proven advantageous. To achieve this, batteries have been proposed that are essentially flat and plate-like. Such battery carriers can be arranged in the floor area of ​​the vehicle and connected to the chassis.

[0006] Therefore, considerable demands are placed on the static and dynamic load-bearing capacity of the battery trays described above. The battery tray must not only be capable of supporting the individual battery modules, but also absorb the dynamic loads that arise during the vehicle's operation. Furthermore, the battery tray must provide the best possible protection for the highly flammable battery modules and / or battery cells, particularly in the event of an accident.

[0007] Furthermore, it is advantageous for a battery tray to be as lightweight as possible, so that the overall weight of the vehicle is not excessively increased by the battery tray and energy can be saved during vehicle movement. Furthermore, it is advantageous to manufacture battery trays as cost-effectively as possible. This presents a further challenge, since the aforementioned requirements for the static and dynamic load capacity of battery trays must still be met despite weight and cost reduction.

[0008] Accordingly, battery trays represent a critical component for the safety, functionality, and cost-effectiveness of vehicles. Such demands on the manufacturing of battery trays and their components sometimes lead to the provision of complex battery tray geometries. Due to the complex geometries of battery trays, manufacturing processes are often used in which several components must be connected, particularly welded, to one another. However, the resulting joints can lead to leaks, meaning that the battery modules accommodated in the battery tray are not reliably protected against the ingress of liquids, especially water.Likewise, the requirements placed on the battery carriers with regard to their mechanical properties often result in the battery carriers having a certain spatial expansion due to the provision of crash and crush structures, so that there is less space to accommodate battery modules and / or battery cells.

[0009] Against this background, the task arose of specifying a battery carrier of the type in question that exhibits advantageous static and dynamic properties as well as low weight and, at the same time, has the smallest possible spatial dimensions. Furthermore, a method for producing such a battery carrier is to be specified, which enables the production of a battery carrier that is as space-saving as possible with advantageous static and dynamic properties and low weight.

[0010] The above-mentioned object is achieved according to the invention according to a first aspect in a battery carrier die-cast part for at least partially delimiting a receiving space of at least one battery cell serving as a drive energy store for an electrically driven vehicle and / or at least one battery module in that the battery carrier die-cast part has at least one section extending substantially along a longitudinal axis, wherein the section has a substantially closed contour, wherein the substantially closed contour comprises a cavity, in particular encloses a cavity, and wherein the closed contour extends integrally around the cavity.

[0011] According to the invention, it was surprisingly discovered that a section comprising a substantially closed contour can be manufactured integrally around a cavity using the die-casting process. The sand cores conventionally used in the die-casting process usually do not have sufficient strength to withstand the pressures occurring in the die-casting process, particularly in the high-pressure casting process. Therefore, the prior art only discloses battery carriers that have an at least partially open contour, so that the molds used, in particular the metallic permanent casting molds used, can be removed from the battery carrier die-cast part after the casting process.

[0012] Preferably, the battery tray die-cast part is produced using the die-casting process in a split metal permanent mold (die-casting mold). The die-castable and liquid metal or liquid casting alloy is pressed into the mold cavity at high speed and solidifies rapidly under high pressure and with high heat dissipation in the permanent mold. Die-cast parts produced in this way are characterized by their high surface quality, dimensional accuracy, and near-net contour.

[0013] The section extending along the longitudinal axis is in particular a longitudinal side or a transverse side of the battery carrier die-cast part.

[0014] Preferably, a substantially circumferential contour simply means that the contour is completely closed around the longitudinal axis of the section. This preferably means an enclosure around the longitudinal axis of the section. For this purpose, it may be sufficient, for example, for the contour to be completely closed around the longitudinal axis, at least in sections. For example, the end faces of the section extending along the longitudinal axis may nevertheless be at least partially open. For example, the section has a substantially circumferential closed contour around the longitudinal axis.

[0015] By completely encompassing a cavity, in particular by enclosing the cavity, the battery carrier die-cast part can provide sufficient crash and crush properties in a space-saving manner. Preferably, the substantially closed contour encloses the cavity along the longitudinal axis of the section.

[0016] In this case, an integral extension of the closed contour around the cavity means, in particular, that the section of the battery carrier die-cast part extends integrally around the cavity, in particular in the longitudinal direction of the section around the cavity. In this context, it is further preferred that the entire battery carrier die-cast part is manufactured in one piece as a single die-cast part.

[0017] A preferred embodiment is characterized in that the battery carrier die-cast part is formed in one piece from a light metal material, in particular from an aluminum alloy. The one-piece design of the battery carrier die-cast part allows a battery carrier to be produced cost-effectively, namely by a die-casting process, which is inexpensive to manufacture and additionally has advantageous static and dynamic properties. The one-piece production of such a battery carrier die-cast part eliminates certain manufacturing steps, since individual components of the battery carrier die-cast part do not have to be subsequently connected to one another, and vulnerable connection areas of the battery carrier die-cast part can be avoided. Such a battery carrier die-cast part has particularly advantageous properties with regard to flexural rigidity and torsional rigidity.Furthermore, the one-piece design of the battery tray die-cast part offers advantageous properties for maintaining required tolerances, achieving sealing requirements, and the ratio of the weight of the battery tray die-cast part to the available space for battery cells and / or battery modules. In this case, a one-piece battery tray die-cast part can be a one-piece battery tray die-cast part.

[0018] A further preferred embodiment is characterized in that a battery carrier is formed by a plurality of battery carrier die-cast parts, in particular by a plurality of battery carrier die-cast parts cast in one piece from a light metal. This can be particularly advantageous from a manufacturing point of view, since, for example, even smaller casting machines can be used to produce a battery carrier.

[0019] According to a further preferred embodiment, it is preferable to connect a battery carrier die-cast part to other parts of the battery carrier, wherein the other parts of the battery carrier are manufactured in particular conventionally. This also allows for manufacturing advantages, since smaller battery carrier die-cast components allow existing manufacturing infrastructure to be utilized.

[0020] In particular, it is preferred that the battery carrier die-cast part forms at least one transverse side and / or at least one transverse web, whereby the resistance to buckling of the entire battery carrier can preferably be increased.

[0021] A further preferred embodiment is characterized in that the at least one section forms at least a part of at least one longitudinal side and / or at least one transverse side of a frame structure, and in that the battery carrier die-cast part in particular forms a substantially circumferential frame structure having longitudinal sides and transverse sides.

[0022] Preferably, the surrounding frame structure is formed substantially rectangular, wherein the longitudinal sides each run substantially parallel to one another and / or wherein the transverse sides run substantially parallel to one another.

[0023] The volume enclosed by the receiving space is preferably the volume which, when the die-cast battery carrier is installed in a vehicle, runs essentially horizontally between the surrounding frame structure and which can therefore accommodate at least one battery cell and / or at least one battery module. In particular, the volume of the receiving space is at least partially enclosed by the surrounding frame structure, wherein the volume of the receiving space is preferably delimited by the inner side surfaces of the longitudinal sides and by the inner side surfaces of the transverse sides of the surrounding frame structure and accordingly extends in particular within the inner side surfaces of the longitudinal sides and the transverse sides of the frame structure.

[0024] A further preferred embodiment is characterized in that at least one section essentially completely forms the longitudinal sides and / or the transverse sides. This makes it possible to provide an advantageous structure, in particular a one-piece structure, over at least one entire longitudinal side and / or one entire transverse side, which has sufficient crash and crush properties. Preferably, the battery carrier die-cast part forms both the longitudinal sides and the transverse sides, so that an essentially one-piece frame structure can be provided.

[0025] A further preferred embodiment is characterized in that the substantially closed contour of a section has at least one opening for the exit of casting cores, in particular sand cores. It has surprisingly been found that sand cores can also be used for the production of the battery carrier die-cast part, in particular the battery carrier die-cast part by high-pressure casting. By means of the openings for the exit of casting cores, the sand cores can be removed from the cavities after the casting process. Preferably, at least one further opening is arranged in the substantially opposite side of the closed contour opposite the opening.As a result, on the one hand, the sand core can be removed more easily from the cavity after the casting process, and on the other hand, the openings, which are in particular aligned with one another, can be advantageously used to connect the battery carrier die-cast part to the body of a vehicle. It is preferred that aligned openings are arranged on opposite sides of the at least one section. These are in particular circular. A further preferred embodiment is characterized in that the at least one substantially closed contour of a section is formed by a plurality of outer walls, and that the plurality of outer walls has a wall thickness in a range from 1 mm to 5 mm, in particular in a range from 2 mm to 4 mm, particularly preferably in a range from 2.5 mm to 3.5 mm.It has been determined that such a wall thickness or wall thickness in the aforementioned ranges can be sufficient to meet the static and dynamic load requirements placed on the battery carrier die-cast part. Furthermore, such thin wall thicknesses can only be realized through the use of a die-casting process, in particular through the use of a high-pressure casting process. Such thin wall thicknesses can advantageously provide additional installation space for the arrangement of the battery cells and / or at least one battery module.

[0026] A further preferred embodiment is characterized in that the closed contour of the at least one section comprises a profile structure on its inner side for stiffening the battery carrier die-cast part, that the profile structure comprises a plurality of profile webs, and that the plurality of profile webs essentially form a box profile and / or a honeycomb profile. The inner side of the closed contour of the at least one section is in particular the side of the closed contour facing the cavity. By providing a profile structure, crash structures in particular can be created which absorb any forces arising in the event of a vehicle accident and protect the battery cells arranged in the battery carrier. These crash structures are preferably represented by sand cores in the die-casting process.

[0027] A further preferred embodiment is characterized in that the profile structure extends only over a portion of the width and / or length of the cavity. In particular, the profile structure does not extend into a central region of the cavity. For example, the profile structure is arranged only on the inside of the closed contour and thus at the edge regions of the cavity. It has surprisingly been shown that the provision of such profile structures leads to sufficient crash properties of the battery carrier die-cast part, while also reducing weight and material requirements. In addition, this reliably enables the essentially complete removal of used sand cores.

[0028] A further preferred embodiment is characterized in that the at least one section has, on its outer contour facing the receiving space, at least one receptacle for at least one battery cell and / or at least one battery module, wherein the at least one receptacle corresponds in particular to the outer contour of at least one battery cell and / or at least one battery module, and wherein the at least one receptacle is preferably substantially curved, particularly preferably semi-cylindrical. As a result, the battery cells and / or the at least one battery module can be reliably fixed in the battery carrier die-cast part. A substantially semi-cylindrical shape is understood to mean a shape that has slight deviations from an ideal semi-cylindrical shape, for example deviations due to design and production. Such a shape is particularly advantageous for accommodating individual battery cells.In addition, other shapes of the at least one receptacle are also conceivable and advantageous depending on other possible battery shapes, for example a rectangular or triangular shape, in particular with rounded corners.

[0029] A further preferred embodiment is characterized in that the battery carrier die-cast part is cast using a high-pressure casting process or a low-pressure casting process using at least one lost casting core, in particular at least one lost sand core. The aforementioned processes have proven particularly preferred because they can provide thin wall thicknesses with sufficient strength. The aforementioned high-pressure casting process is, in particular, a process in which a molten metal is introduced into a two- or multi-part permanent mold at high pressure and high speed.

[0030] For example, the sand core used is a sand core comprising sand, in particular quartz sand, a binder, and at least one additive, wherein the binder in particular comprises at least one hydrophilic polymer. It has surprisingly been found that cores made from such a composition have sufficient strength to withstand the forces that occur during die casting, in particular high-pressure casting, while simultaneously being capable of being washed out of an internal cavity of a cast object, in particular with water alone.

[0031] It is preferred that the sand core used contains between 1 and 20 wt.%, in particular between 2 and 10 wt.%, of binder. The binder can, for example, be a binder known from the prior art for use in sand cores. For example, the sand core used can contain between 0.5 and 15 wt.%, in particular between 5 and 10 wt.%, of hydrophilic polymer. For example, the hydrophilic polymer comprises polysaccharide or polysaccharide derivatives. The sand core used preferably contains 1 to 10 wt.% of additives, for example pozzolanic additives. This makes it possible to provide a sand core that can withstand high pressures, so that it can be used in a high-pressure casting process.

[0032] For example, the casting core used can also be a salt core known from the state of the art.

[0033] A further preferred embodiment is characterized in that the cavity of the at least one section is filled, in particular completely filled, with an energy-absorbing material, in particular with a foam. For example, the energy-absorbing material can also have other properties, such as insulating properties. Preferably, the foam is already present during the casting process and / or is introduced during the casting process and thus forms a type of casting core, which, however, remains in the battery carrier die-cast component. For example, the energy-absorbing material, in particular the foam, is designed to absorb the energy occurring in the event of a crash, so that the crash and crush properties of the battery carrier die-cast part can be further improved. Preferably, the energy-absorbing material, in particular the foam, fills the entire cavity.By providing the energy-absorbing material with a preferably low density, it is possible to improve the mechanical properties of the battery carrier die-cast part despite its relatively low weight.

[0034] For example, the energy-absorbing material can comprise expanded polypropylene (EPP), polyurethane (PU), and / or expanded polyethylene (EPE, cross-linked or non-cross-linked), in particular consisting of expanded polypropylene (EPP), polyurethane (PU), and / or expanded polyethylene (EPE, cross-linked or non-cross-linked). This can, for example, enable a foam structure with high thermal conductivity and advantageous mechanical properties while maintaining a low weight. For example, the energy-absorbing material can also be metal foam.

[0035] For example, the energy-absorbing material can be a multi-component system, in particular a 2-component system, particularly preferably a 2-component plastic system, which only hardens when the two components are mixed together

[0036] A further preferred embodiment is characterized in that the at least one section has at least one flange, in particular a circumferential flange, on its outer contour facing the receiving space, as a support surface for a cooling plate. This enables a reliable connection of the battery carrier die-cast part to a cooling plate. Preferably, the flange is provided with openings that enable the cooling channels arranged in the cooling plate to be connected to the cavity of the at least one section.

[0037] A further preferred embodiment is characterized in that the at least one section has passages on its outer walls for arranging cooling channels, at least one HV connection, and / or other connections between the at least one battery cell and / or at least one battery module and the surroundings of the battery carrier die-cast part. This advantageously allows passages required during operation of the battery carrier die-cast part to be considered during production, so that they do not have to be subsequently introduced in a separate production step. This is also advantageous for the mechanical properties of the battery carrier die-cast part and for reduced overall complexity.

[0038] A further preferred embodiment is characterized in that the battery carrier die-cast part is cast in one piece from an aluminum alloy; and that the aluminum alloy is preferably an AlSi aluminum casting alloy. It has been found in practice that the use of a one-piece battery carrier die-cast part with the aforementioned aluminum alloy results in a battery carrier die-cast part with preferred static and dynamic properties, while simultaneously providing a reduced weight.

[0039] The above-mentioned object is achieved according to a second aspect of the present invention by a method for producing a battery carrier die-cast part, in particular an aforementioned battery carrier die-cast part, from a light metal melt, in particular from a melt of an aluminum alloy, by high-pressure casting, comprising the following steps: arranging at least one lost core and / or at least one energy-absorbing material, in particular an inlay, in a mold cavity comprising at least two movable mold parts; filling the light metal melt into the mold cavity by means of a gating system, keeping the mold cavity closed until the light metal melt filled into the mold cavity has substantially solidified, and opening the mold cavity and removing the battery carrier die-cast part molded in the mold cavity.

[0040] This makes it possible to provide a one-piece battery carrier die-cast part within the framework of a die-casting process, in particular within the framework of a high-pressure casting process, which has advantageous mechanical properties despite its compact dimensions. The invention is based on the discovery, surprising to those skilled in the art, that an aforementioned battery carrier die-cast part can be produced in one piece by casting based on a die-casting process using casting cores and / or an inlay remaining in the die-cast part. For example, the aforementioned specified sand cores, salt cores, and / or foams are used in connection with the method according to the second aspect.

[0041] According to a third aspect, the aforementioned object is achieved by a battery carrier comprising at least one battery carrier die-cast part. For example, at least one battery carrier die-cast part can form the entire battery carrier.

[0042] The above-described embodiments and exemplary configurations of all aspects of the present invention, which are initially basically stand-alone, are also to be understood as disclosed in all combinations with one another.

[0043] Further advantageous exemplary embodiments of the invention can be found in the following detailed description of some exemplary embodiments of the present invention, particularly in conjunction with the figures. However, the figures appended to the application are intended only for the purpose of illustration and not to define the scope of the invention. The accompanying drawings are not necessarily to scale and are intended merely to reflect the general concept of the present invention by way of example. In particular, features contained in the figures should in no way be considered a necessary part of the present invention.

[0044] The invention is explained in more detail below with reference to exemplary embodiments of the drawings. They show schematically:

[0045] Fig. 1 is a schematic view of an upper side of an embodiment of a battery carrier die-cast part in a perspective representation;

[0046] Fig. 2 is a schematic view of an underside of the embodiment of the battery carrier die-cast part in a perspective view; and

[0047] Fig. 3a to b sectional views along the section line 111 shown in Fig. 2.

[0048] In the following description of the various embodiments according to the invention, components and elements with the same function and the same mode of operation are provided with the same reference numerals, even if the components and elements in the various embodiments may have differences in their dimensions or shape.

[0049] Fig. 1 shows a battery carrier die-cast part 2 for at least partially defining a receiving space 4 for at least one battery cell serving as a drive energy storage device for an electrically powered vehicle and / or at least one battery module. The battery carrier die-cast part 2 has a circumferential frame structure 6, wherein the circumferential frame structure 6 has two longitudinal sides 8 and two transverse sides 10. The battery carrier die-cast part 2 is preferably cast in one piece from a light metal material, in particular from an aluminum alloy.

[0050] Between the longitudinal sides 8, two transverse webs 12 run essentially parallel to the transverse sides 10. Furthermore, between the transverse webs 12, a longitudinal web 14 runs essentially parallel to the longitudinal sides 8. The longitudinal web 14 is essentially rectangular, with the transverse webs 12 each having two recesses 16. The transverse webs 12 and the longitudinal webs 14 form a total of four areas 8 for storing battery cells and / or battery modules. Connecting sleeves 17 are arranged between the transverse webs 12 and the longitudinal webs 14, which serve, for example, to connect the battery carrier die-cast part 2 to the vehicle body.

[0051] The longitudinal sides 8 of the battery carrier die-cast part 2 are each formed by sections 8 extending along a longitudinal side. These sections 8 have a substantially closed contour 20. The substantially closed contour 20 of the sections 8 formed as longitudinal sides has a plurality of openings 22 for the exit of sand cores. In addition, the sections 8 formed as longitudinal sides have, on the side opposite the plurality of openings 22, smaller through-holes 26 arranged in a projection 24, which are aligned with the respective openings 22. By means of the openings 22 and the through-holes 26, the core sand arranged in the sections 8 can be reliably removed. In addition, the openings 22 and the through-holes 26 could also be used, for example, to connect the battery carrier die-cast part 2 to a vehicle, in particular to a vehicle body.

[0052] For example, openings 22 are also arranged within the transverse sides 10, through which the core sand can be removed from the battery carrier die-cast part 2 after the casting process. Connecting components 28 are also arranged on the transverse sides 10, which serve to connect the battery carrier die-cast part 2 to other components of the vehicle, such as the vehicle body.

[0053] It can also be seen that both the longitudinal sides 8 and the transverse sides 10 have a plurality of receptacles 30 for accommodating battery cells on the outer contour facing the receiving space 4. The receptacles 30 are semi-cylindrical in this case. On their upper side, the receptacles 30 form a circumferential flange 32, which serves as a support surface for a cooling plate.

[0054] The section formed as transverse side 10 also has corresponding passages 34 and 36 on its opposing outer walls. The passages 34 and / or 36 can serve, for example, to connect the battery cells and / or battery modules arranged in the battery carrier casting 2 to other components, such as the electric motor. It is also conceivable that the passages 34 and / or 36 serve to connect a cooling plate to a cooling circuit.

[0055] Fig. 3a and b show sectional views of the section 8 formed as a longitudinal side. It can be seen that the section 8 is enclosed by a substantially closed contour 20. A cavity 38 is enclosed within the closed contour 20, wherein the closed contour 20 extends integrally around the cavity 38 along the longitudinal axis of the section 8 or the longitudinal side 8.

[0056] The closed contour 20 is formed by a plurality of outer walls 40, 42, 44 and 46, which have a wall thickness in a range of 1 mm to 5 mm, preferably in a range of 2 mm to 4 mm.

[0057] Furthermore, it can be seen that the closed contour 20 has a profile structure 48 on its inner side for stiffening the battery carrier die-cast part 2. The profile structure 48 comprises a plurality of profile webs 50, 52, and 54, wherein the profile webs 50, 52, and 54 essentially form a box profile. The profile webs 50, 52, and 54 extend along the entire inner side of the closed contour 20, wherein the profile webs 50, 52, and 54 extend only over a portion of the width of the cavity 38. It can be seen that a substantially O-shaped region of the cavity 38, viewed in the longitudinal direction of section 8, has no profile structure 48.

[0058] The exemplary embodiments of the present invention described in this specification are to be understood as disclosed both individually and in all combinations with one another. In particular, the description of a feature encompassed by an embodiment should not be understood in this case - unless explicitly stated otherwise - to mean that the feature is essential or essential for the function of the embodiment. The sequence of the method steps described in this specification in the individual flow diagrams is not mandatory; alternative sequences of the method steps are conceivable. The method steps can be implemented in various ways; for example, an implementation in software (by program instructions), hardware, or a combination of both is conceivable for implementing the method steps.

[0059] Terms used in the claims such as "comprise," "have," "include," "contain," and the like do not exclude further elements or steps. The phrase "at least partially" encompasses both "partially" and "fully." The phrase "and / or" is intended to indicate that both the alternative and the combination are disclosed, thus "A and / or B" means "(A) or (B) or (A and B)." A plurality of units, persons, or the like, in the context of this specification, means multiple units, persons, or the like. The use of the indefinite article does not exclude a plurality. A single device may perform the functions of multiple units or devices recited in the claims. Reference numerals indicated in the claims are not to be construed as limitations on the means and steps employed.

[0060] List of reference symbols

[0061] 2 Battery carrier die-cast part

[0062] 4 Recording room

[0063] 6 Frame structure

[0064] 8 Long side or section of the battery carrier die-cast part

[0065] 10 Transverse side or section of the battery carrier die-cast part

[0066] 12 crossbar

[0067] 14 Longitudinal web

[0068] 16 recess

[0069] 17 Connection sleeve

[0070] 20 Closed contour of the section

[0071] 22 Opening for the exit of casting cores

[0072] 24 lead

[0073] 26 through holes

[0074] 28 Connection component

[0075] 30 recordings

[0076] 32 flange

[0077] 34 passage

[0078] 36 passage

[0079] 38 cavity

[0080] 40 exterior wall

[0081] 42 exterior wall

[0082] 44 Exterior wall

[0083] 46 exterior wall

[0084] 48 Profile structure

[0085] 50 profile web

[0086] 52 profile web

[0087] 54 profile web

Claims

Patent claims 1. Battery carrier die-cast part for at least partially delimiting a receiving space (4) of at least one battery cell serving as a drive energy store for an electrically powered vehicle and / or at least one battery module, wherein the battery carrier die-cast part (2) has at least one section (8, 10) extending substantially along a longitudinal axis, wherein the section (8, 10) has a substantially closed contour (20), wherein the substantially closed contour (20) comprises a cavity (38), in particular enclosing a cavity (38), and wherein the closed contour (20) extends integrally around the cavity (38).

2. Battery carrier die-cast part according to claim 1, characterized in that the battery carrier die-cast part (2) is formed in one piece from a light metal material, in particular from an aluminum alloy.

3. Battery carrier die-cast part according to claim 1 or 2, characterized in that the at least one section (8, 10) forms at least a part of at least one longitudinal side (8) and / or at least one transverse side (10) of a frame structure (6), and that the battery carrier die-cast part (2) forms in particular a substantially circumferential frame structure (6) having longitudinal sides (8) and transverse sides (10).

4. Battery carrier die-cast part according to claim 3, characterized in that at least one section (8, 10) essentially completely forms the longitudinal sides (8) and / or the transverse sides (10).

5. Battery carrier die-cast part according to one of claims 1 to 4, characterized in that the substantially closed contour (20) of a section (8, 10) has at least one opening (22) for the exit of casting cores, in particular sand cores.

6. Battery carrier die-cast part according to one of claims 1 to 5, characterized in that the at least one substantially closed contour (20) of a section (8, 10) is formed by a plurality of outer walls (40, 42, 44, 46), and in that the plurality of outer walls (40, 42, 44, 46) has a wall thickness in a range from 1 mm to 5 mm, in particular in a range from 2 mm to 4 mm, particularly preferably in a range from 2.5 mm to 3.5 mm.

7. Battery carrier die-cast part according to one of claims 1 to 6, characterized in that the closed contour (20) of the at least one section (8, 10) comprises on its inner side a profile structure (48) for stiffening the battery carrier die-cast part (2), that the profile structure (48) comprises a plurality of profile webs (50, 52, 54), and that the plurality of profile webs (50, 52, 54) essentially form a box profile and / or a honeycomb profile.

8. Battery carrier casting according to claim 7, characterized in that the profile structure (48) extends only over a part of the width and / or the length of the cavity (38).

9. Battery carrier casting, characterized in that the at least one section (8, 10) has at least one receptacle (30) for at least one battery cell and / or at least one battery module on its outer contour facing the receiving space (4), wherein the at least one receptacle (30) corresponds in particular to the outer contour of at least one battery cell and / or at least one battery module, and wherein the at least one receptacle (30) is preferably substantially curved, particularly preferably semi-cylindrical.

10. Battery carrier die-cast part according to one of claims 1 to 9, characterized in that the battery carrier die-cast part (2) is cast in the high-pressure casting process or in the low-pressure casting process using at least one lost core, in particular a lost sand core.

11. Battery carrier die-cast part according to one of claims 1 to 10, characterized in that the cavity (38) of the at least one section (8, 10) is filled, in particular completely filled, with an energy-absorbing material, in particular with a foam.

12. Battery carrier die-cast part according to one of claims 1 to 11, characterized in that the at least one section (8, 10) has at least one flange (32) as a support surface for a cooling plate on its outer contour facing the receiving space (4).

13. Battery carrier die-cast part according to one of claims 1 to 12, characterized in that the at least one section (8, 10) has on its opposite outer walls (40, 42, 44, 46) corresponding passages (34, 36) for arranging cooling channels, an HV connection and / or further connections between the at least one battery cell and the surroundings of the battery carrier die-cast part (2).

14. Battery carrier die-cast part according to one of claims 1 to 13, characterized in that the battery carrier die-cast part (2) is cast in one piece from an aluminum alloy; and that the aluminum alloy is preferably an AlSi aluminum casting alloy.

15. A method for producing a battery carrier die-cast part, in particular a battery carrier die-cast part according to one of claims 1 to 14, from a light metal melt, in particular from a melt of an aluminum alloy, in high-pressure casting, comprising the steps: Arranging at least one lost core and / or at least one energy-absorbing material, in particular an inlay, in a mold cavity comprising at least two movable mold parts; Filling the light metal melt into the mold cavity using a sprue system, Keeping the mold cavity closed until the light metal melt filled into the mold cavity has substantially solidified, and Opening the mold cavity and removing the battery carrier die-cast part molded in the mold cavity.

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