Electrical energy storage for a motor vehicle

Abstract

Electrical energy storage device (1) for a motor vehicle, comprising a storage housing (2) which at least partially delimits at least one receiving space (7), and comprising at least one storage element (8) which is arranged in the receiving space (7) between walls (3, 4) of the storage housing (2), wherein the storage element (8) extends obliquely to the walls (3, 4) and the walls (3, 4) are supported at least indirectly against each other via the storage element (8), and one of the walls (3, 4) is arranged on a lower surface (10) of the storage housing (2) extending downwards in the vehicle's vertical direction (9), and another of the walls (4) is arranged on a top surface (11) of the storage housing (2) extending upwards in the vehicle's vertical direction (9), and wherein at least one further storage element (14) is provided, arranged in the receiving space (7) and extending obliquely or perpendicularly to the storage element (8), characterized in thatthat the further storage element (14) is arranged at least predominantly in an intermediate space (17) which extends between the storage element (8) and one of the walls (3, 4).

Description

The invention relates to an electrical energy store for a motor vehicle according to the preamble of claim 1.WO 2020 / 259 879 A1 discloses an energy storage device for a motor vehicle, comprising a plurality of round cells for electrochemical storage of energy and a plurality of holding frames for holding the round cells.Furthermore, DE 10 2018 204 420 A1 discloses a battery arrangement for load-bearing structural integration of batteries into a vehicle, in particular an aircraft or spacecraft, having two cover plates with battery holders and a multiplicity of batteries which are held between the cover plates on both sides of the battery holders, wherein the batteries are arranged in battery rows along the cover plates, and wherein the batteries in the battery rows are each aligned at an angle of inclination with respect to the cover plates for receiving and forwarding loads.In addition, US 2013 / 0 224 574 A1 discloses a system for storing electrical energy for a vehicle. Furthermore, DE 10 2015 214 185 A1 discloses a battery module for a motor vehicle. In addition, a battery cell module is known from DE 10 2014 117 396 A1. Finally, KR 10 2022 0 030 545 A discloses a battery module.It is the object of the invention to provide an electrical energy store for a motor vehicle, such that a mechanical load capacity of the electrical energy store can be particularly improved.This object is achieved according to the invention by an electrical energy store for a motor vehicle having the features of patent claim 1. Advantageous embodiments of the invention are the subject matter of the dependent claims and the description.The invention relates to an electrical energy store for a motor vehicle, in particular an electrically drivable motor vehicle, which is designed, for example, as a motor vehicle, in particular as a passenger vehicle. The motor vehicle preferably has the electrical energy store, in particular in its completely produced state.The fact that the motor vehicle is electrically drivable can be understood in particular to mean that the motor vehicle has at least one electric machine, by means of which the motor vehicle can be driven, in particular electrically, in particular purely electrically. In other words, the motor vehicle is designed as a battery-electric vehicle or as a hybrid vehicle.The electrical energy store can be understood in particular as a battery or an accumulator. The electric machine can preferably be supplied with energy, in particular stored in the electric energy store or chemically bound energy, by means of the electric energy store in order to drive the motor vehicle. In other words, the electrical energy store is designed as an electrical traction store, in particular as a traction battery.In order to be able to realize a particularly high electrical power for electrically, in particular purely electrically, driving the motor vehicle, the electrical energy store can have an electrical voltage, in particular an electrical operating voltage or rated voltage, which is preferably greater than 50 volts, in particular above 60 volts, and is preferably a plurality of 100 volts. Accordingly, the electrical energy store is preferably designed as a high-voltage component, in particular as a high-voltage store.The electrical energy store has at least one storage housing, which can be referred to in particular as a housing. The storage housing can be understood in particular as a housing element of the electrical energy store.The storage housing delimits at least one receiving space at least partially, in particular predominantly or completely. This means that the electrical energy store has the at least one receiving space which is bounded at least partially, in particular predominantly or completely, for example directly. In other words, the receiving space is at least partially formed by the storage housing. Again in other words, the receiving space is at least partially, in particular predominantly or completely, covered by the storage housing. In particular, the receiving space extends at least partially, in particular predominantly or completely, within the storage housing.The electrical energy store has at least one storage element which is arranged, in particular completely, in the receiving space between walls, that is to say between a plurality of walls, for example between at least two walls, of the storage housing. This means that the storage element extends, in particular completely, in the receiving space, i.e. within the storage housing, and in particular between the walls. In other words, the storage element arranged in the receiving space or the memory housing adjoins a first of the walls on a first side of the storage element, for example at one end, at least indirectly, in particular directly, and the storage element adjoins a second of the walls on a second side of the storage element which is different from the first side and in particular faces away from the first side, for example at the other end, at least indirectly, in particular directly.The fact that the storage element is arranged between the walls can be understood in particular to mean that the storage element is arranged between the walls in at least one direction, that is to say extends between the walls in the at least one direction. The walls can be understood to mean, in particular, wall regions of the storage housing. The walls can be formed separately from one another or the walls can be formed together in one piece, that is to say from one piece, for example from a monoblock.The storage element is preferably designed as a storage cell. In particular, the storage element is designed for storing or chemically binding electrical energy. The storage cell is designed, for example, prismatically or round. In other words, the storage cell is designed as a prismatic cell or as a round cell.In order to be able to particularly improve, in particular particularly increase, a mechanical load capacity of the electrical energy store, in particular of the store housing, it is provided according to the invention that the storage element extends obliquely to the walls. This means that the storage element extends obliquely to the walls. In other words, a main extension direction of the storage element, in particular an axial direction of the storage element, runs obliquely to the walls, in particular to the first and the second wall. It is provided that, in particular when the memory housing is acted upon mechanically, the walls, in particular for stabilizing or reinforcing the memory housing, are supported or supportable at least indirectly, in particular directly, against one another via the memory element. This means that the walls of the storage housing are located via the storage element, i.e. via the storage element, in an at least indirect or direct support system. In other words, the walls, in particular the first and the second wall, can be coupled or are coupled to one another at least indirectly or directly, in particular mechanically, via the storage element. This means that the walls, in particular the first and the second wall, can be connected or are connected to one another, in particular mechanically, via the storage element. In other words, the storage element is arranged in a load path resulting from the mechanical loading of the storage housing and running between the walls, in particular the first and the second wall, as a result of which the load path runs via the storage element. This can be understood in particular to mean that the storage element is designed for, in particular, mechanical, load transmission between the walls, in particular the first and the second wall. The storage element is thus preferably part of a supporting structure of the storage housing, in particular of the electrical energy store. This means that the storage element is designed as a structural and / or force-absorbing component of the electrical energy store, in particular of the storage housing.The fact that the storage element extends obliquely to the walls can be understood in particular to mean that the storage element extends at an angle or with formation of an angle, i.e. in an angular position, to the walls, in particular to the first and the second wall, wherein the angle is greater than 0 degrees and less than 90 degrees and / or greater than 90 degrees and less than 180 degrees. The angle can be understood here in particular as an angle which the storage element and the walls enclose or form with one another.The invention is based in particular on the following findings and considerations: modern electrical energy stores, in particular high-voltage stores, can be produced increasingly or increasingly in so-called cell-to-pack methods. In this case, individual cells can no longer be divided into clearly separate modules, but rather the storage housing, which is referred to in particular as a battery housing, can be filled at least substantially completely with cells. The cells can assume a load-bearing role as a structural component. In a conventional electrical energy store, storage elements can usually run at a 90 degree angle to walls of the storage housing. This means that the storage cells of the conventional electrical energy store are not inclined, but run perpendicular to the walls. In this case, 90 degree angles can be unsuitable or not optimum for transmitting force, in particular when bent. However, in a conventional electrical energy store, cell-to-pack formats can also be used to install exclusively storage elements in 90 degree positions. A full structuring potential of the storage elements can thus not be utilized in the conventional electrical energy store, as a result of which weight, installation space or the like can be wasted, so to speak. In principle, it is conceivable to provide additional stiffening elements in the storage housing, which are formed separately from storage elements, but this can have a negative effect on installation space, energy density and / or weight. A crash-protected installation space between wheels can be a popular installation space for high-voltage accumulators in the motor vehicle. However, this installation space can be very limited, which is why the energy density can be maximized there. This may also be due to the fact that electrical energy stores may be orders of magnitude behind chemical energy carriers at the energy density.The electrical energy store according to the invention can overcome the aforementioned disadvantages. In the electrical energy store according to the invention, at least one inclined cell in the form of the storage element is used for connecting the walls, in particular the first and the second wall, of the storage housing. This means that at least two sides of the storage housing are connected to one another via the storage element, which is designed, for example, as a tie rod and as a push rod or acts as a tie rod and as a push rod, in particular in order to achieve the greatest possible bending stiffness of the storage housing, in particular of the electrical energy store. As a result, the mechanical load capacity of the electrical energy store, in particular the storage housing, can be particularly increased. In particular, the bending stiffness of the electrical energy store, in particular of the storage housing, can be particularly increased. The invention is based in particular on the finding that, analogously to physical construction, shear and tension struts between two components, for example beams, which are spaced apart as far as possible are particularly well suited to be able to particularly increase mechanical load-bearing capacity, in particular bending stiffness. Thus, light and yet stable structures can be created, for example analogous to the egg-piercing tower.Furthermore, it is provided that one of the walls, for example the first wall, is arranged on an underside of the storage housing, which underside points or faces downward in the vehicle vertical direction, in particular the installation position of the electrical energy store in the motor vehicle, and another of the walls, for example the second wall, is arranged on an upper side of the storage housing, which upper side points or faces upward in the vehicle vertical direction, in particular the installation position of the electrical energy store in the motor vehicle. This means that the walls which are supportable or supported against one another via the storage element delimit the receiving space at least partially in the vehicle vertical direction, wherein, for example, one of the walls, in particular the first wall, delimits the receiving space at least partially downward in the vehicle vertical direction and another of the walls, for example the second wall, delimits the receiving space upward in the vehicle vertical direction. In other words, the walls can be supported or supported on one another at least indirectly, in particular directly, in the vehicle vertical direction via the storage element. The upper side, which is referred to in particular as the storage upper side, and the lower side, which is referred to in particular as the storage lower side, of the storage housing, in particular of the electrical energy store, can thus be connected to one another via the storage element, which is designed, for example, as a tension and push strut, in order to achieve the greatest possible bending stiffness. In this case, an in particular complete storage height of the electrical energy store, in particular of the storage housing, which extends in the vehicle vertical direction can counteract bending. As a result, the mechanical load capacity, in particular the bending stiffness, of the electrical energy store or of the storage housing can be particularly increased.Furthermore, the electrical energy store has at least one further storage element which is arranged in the receiving space, in particular between the walls, and extends obliquely or perpendicularly to the first storage element, and which can be referred to in particular as a third storage element. In other words, the third storage element is accommodated in the accommodation space or the storage housing, wherein the first and the third storage element are arranged obliquely or perpendicularly to one another. This means in particular that main extension directions of the storage element and of the third storage element run obliquely or perpendicularly to one another. The main extension direction of the third storage element is, for example, an axial direction of the third storage element. The fact that the first storage element and the third storage element are arranged obliquely to one another can be understood in particular to mean that the first and the third storage element extend in or at a third angle to one another which is greater than 0 degrees and less than 90 degrees and / or greater than 90 degrees and less than 180 degrees. The third storage element is arranged at least predominantly, in particular completely, in an intermediate space which extends between the storage element and one of the walls, for example the first or the second wall. In other words, the intermediate space is bounded at one end at least partially by the first storage element and at the other end by at least one of the walls. Installation space in the form of the intermediate space, which is released by the inclined first storage element, can thus be exploited by a spatially differently arranged storage element in the form of the third storage element. As a result, particularly many storage elements can be arranged in the receiving space or in the storage housing. This means that a cell number, in particular a cell density, of the electrical energy store can be increased in a particular manner. As a result, an electrical range of the motor vehicle can be particularly increased.In a further embodiment, it is provided that the storage housing, in particular the receiving space, is or is filled at least in regions with a foam. In other words, the storage housing or the receiving space is at least partially, in particular predominantly or completely, foamed. The foam thus extends at least in regions in the receiving space or the storage housing. Preferably, the foam extends at least between the storage element and at least one of the walls, for example the first and / or the second wall. In other words, the foam is arranged at least between the storage element and at least one of the walls of the storage housing. In particular, the storage element can be supported or supported via the foam, that is to say with the aid of the foam, on at least one of the walls, in particular on the first and / or on the second wall. Thus, cavities remaining in particular in the storage housing or the receiving space can be filled with the foam, as a result of which a mechanical stability of the storage housing can be particularly increased. As a result, the mechanical load capacity of the storage housing or of the electrical energy store can be particularly increased. Furthermore, for example, cooling lines can be enclosed by the foam. The foam is, for example, polyurethane foam (PU). This means that the foam can be formed at least partially, in particular predominantly or completely, from polyurethane.In a further embodiment, it is provided that the storage element is galvanically separated from the walls, for example from the first and the second wall, in particular from the storage housing. In other words, the storage element is electrically insulated from the walls, in particular the storage housing. This means that the storage element is non-conductively connected to the storage housing, for example at the top and bottom in the vehicle vertical direction.In a further embodiment, the electrical energy store has at least one further storage element which is arranged in the receiving space between the walls, in particular the first and the second wall, of the storage housing and which can be referred to in particular as a second storage element. In other words, the further storage element is accommodated in the accommodation space or the storage housing and extends between the walls. Preferably, it is provided that, when the storage housing is acted upon, in particular mechanically, the walls, for example the first and the second wall, are supported on one another at least indirectly, in particular directly, via the second storage element, in particular for stabilizing the storage housing. This means that the walls, in particular the first and the second wall, can be coupled or are coupled to one another, in particular mechanically, via the further storage element. The walls can thus be connected to one another via the storage element and the further storage element. In other words, the further storage element is arranged in the load path, whereby the load path runs over the further storage element. As a result, the mechanical load capacity, in particular the bending stiffness, of the storage housing or of the electrical energy store can be particularly increased. In particular, the further storage element is part of the supporting structure of the storage housing. For example, the storage element and the further storage element are of identical construction.The fact that the further storage element extends obliquely to the walls can be understood in particular to mean that the further storage element and the walls, in particular the first and the second wall, run at a second angle, that is to say enclose the second angle with one another, wherein the second angle is greater than 0 degrees and less than 90 degrees and / or greater than 90 degrees and less than 180 degrees. In particular, a main extension direction of the further storage element runs obliquely to the walls.Preferably, it is provided that the storage element, which can be referred to in particular as a first storage element, and the second storage element extend obliquely, perpendicularly or parallel to one another. In other words, the storage element and the further storage element are arranged obliquely, perpendicularly or parallel to one another. Thus, for example, an optimum angle can be realized, via which the storage elements can be supported or supported on the respective wall. The angular position can thus be applied in a plurality of, in particular in all, spatial directions. As a result, the mechanical load capacity of the storage housing or of the electrical energy store can be particularly increased.In a further embodiment, the electrical energy store has at least one cell connector, via which the storage element and the further storage element are electrically connected, in particular directly. In other words, the storage element, which is designated in particular as the first storage element, and the further storage element can be electrically coupled or are electrically coupled to one another, in particular directly, via the cell connector.In a further embodiment, it is provided that the cell connector has a respective contact region, against which the respective storage element, i.e. the first and the further storage element or the second storage element, bears in its respective radial direction, in particular at least indirectly or directly. This means that the cell connector has at least one first contact region against which the first storage element abuts in its radial direction, and that the cell connector has at least one second contact region which is different from the first contact region, for example spaced apart from the first contact region, and against which the further or the second storage element abuts in its radial direction. In other words, the respective storage element, that is to say the first and the further or second storage element, can be supported or is supported at least indirectly, in particular directly, on the respective bearing region in the radial direction. The respective contact region is formed, for example, as a respective shell which surrounds, for example, at least a part of a circumference of the respective storage element. As a result, the storage elements can be electrically and mechanically connected to one another via the cell connector, wherein the mechanical connection can be embodied in a particularly stable manner. As a result, the mechanical load capacity of the electrical energy store or of the storage housing can be particularly increased.In a further embodiment, the electrical energy store has at least one cooling element which is arranged in the receiving space and through which a coolant can flow and extends obliquely with respect to the walls, in particular obliquely with respect to the first and the second wall. In other words, the cooling element, which can be referred to in particular as a first cooling element, extends at least in regions, in particular predominantly or completely, in the receiving space or within the storage housing, wherein the cooling element is arranged obliquely to the walls. The walls are supported or supportable at least indirectly, in particular directly, against one another via the cooling element. This means that the walls, in particular the first and the second wall, can be coupled or are coupled to one another, in particular mechanically, via the cooling element. In other words, the first cooling element is arranged in the load path, whereby the load path runs over the cooling element. As a result, the mechanical load capacity of the electrical energy store or of the storage housing can be particularly increased. This can be achieved in particular because the cooling element can realize additional stability of the storage housing.The cooling element extending obliquely to the walls can be understood in particular to mean that the cooling element and the walls extend in or at an angle, in particular designated as a fourth angle, which is greater than 0 degrees and less than 90 degrees and / or greater than 90 degrees and less than 180 degrees. In particular, the cooling element can be flowed through by the coolant in a direction running obliquely to the walls. The cooling element is preferably designed for cooling at least one storage element, in particular the first, the second and / or the third storage element. The first cooling element, which can be referred to in particular as a cell cooler, is preferably part of the supporting structure of the storage housing. Thus, an inclined cell cooler can be integrated as a structural and / or force-absorbing component in the electrical energy store, in particular in the storage housing. The first cooling element is designed, for example, as a side cooler and / or as a cooling coil. Thus, for example, an outer lateral surface of at least one of the storage elements, in particular of the first, of the second and / or of the third storage element, can be cooled by means of the first cooling element. The first cooling element is formed, for example, from metal, in particular from aluminum or from steel, or the first cooling element is formed, for example, as an inflatable cooling element.In a further embodiment, the electrical energy store has at least one cooling element which is arranged in the receiving space, in particular between the walls, and through which a coolant can flow, and which can be referred to in particular as a second cooling element. In other words, the second cooling element extends in the receiving space or within the storage housing. Via the second cooling element, the first storage element is or can be supported on at least one of the walls, in particular on the first and / or on the second wall, for example at least indirectly or directly. In other words, the second cooling element is arranged at least in regions between the first storage element and at least one of the walls. As a result, a connection of the storage element to at least one of the walls and also the cooling of the storage element can be realized simultaneously via the second cooling element. Furthermore, the storage element can be connected to the respective wall in a particularly secure manner, as a result of which the mechanical load capacity of the storage housing or of the electrical energy store can be particularly increased. Preferably, at least one storage element, in particular the first, the second and / or the third storage element, can be cooled by means of the second cooling element.Further features of the invention are evident from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description and the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination but also in other combinations or alone.The invention will now be explained in more detail on the basis of a preferred exemplary embodiment and with reference to the drawings. The following are shown: FIG. 1 shows a schematic partial sectional view of an electrical energy store according to the invention; and FIG. 2 shows a schematic and perspective partial view of an electrical energy store according to the invention according to a further embodiment; and FIG. 3 shows a schematic and perspective partial view of an electrical energy store according to the invention according to a further embodiment; and FIG. 4 shows a schematic partial sectional view of an electrical energy store according to the invention according to a further embodiment; and FIG. 5 shows a schematic partial sectional view of an electrical energy store according to the invention according to a further embodiment.In the figures, identical or functionally identical elements are provided with identical reference symbols.FIG. 1 shows a schematic partial sectional view of an electrical energy store 1 for a motor vehicle. The electrical energy store 1 has at least one storage housing 2, which can also simply be referred to as a housing.In the exemplary embodiment, the storage housing has a plurality of walls 3, 4, for example at least two walls 3, 4. A first of the walls 3 is designed, for example, as a base element, in particular as a base plate, of the storage housing 2. The second of the walls 4 is designed, for example, as a cover element, in particular as a cover plate, of the storage housing 2. The walls 3, 4 extend, for example, parallel to one another. The walls 3, 4 are spaced apart from one another. In the exemplary embodiment shown in FIG. 1, two further walls 5, 6 of the storage housing 2 which are spaced apart from one another can be seen, wherein the further walls 5, 6 can be referred to in particular as third wall 5 and as fourth wall 6. The further walls 5, 6 preferably extend obliquely or perpendicularly to the first and the second wall 3, 4. in particular, the first and the second wall 4 are connected to one another via the third and the fourth wall 5, 6, in particular directly. Thus, the third and the fourth walls 5, 6 are formed, for example, as side walls of the storage housing 2.The storage housing 2, in particular the walls 3, 4, 5, 6, at least partially, in particular predominantly or completely delimit at least one receiving space 7 of the electrical energy store 1. The electrical energy store 1 has at least one storage element 8, which is arranged in the receiving space 7 between the first and the second walls 3, 4, in particular the third and the fourth walls 5, 6, of the storage housing 2. The storage element 8 is preferably designed as a storage cell.In order to be able to particularly improve a mechanical load capacity of the electrical energy store 1, in particular of the storage housing 2, it is provided that the storage element 8 extends obliquely to the first and the second wall 3, 4 and, in particular when the storage housing 2 is acted upon mechanically, the first and the second wall 3, 4 are supported or supportable at least indirectly, in particular directly, against one another, in particular for stabilizing or reinforcing the storage housing 2, via the storage element 8. The storage element 8 can therefore be referred to in particular as an oblique storage element, in particular as an oblique battery cell. In the exemplary embodiment, the storage element 8 is designed as a tension strut and as a shear strut, in particular under the storage housing 2, to be reinforced in particular mechanically. Due to the fact that the storage element 8 extends obliquely to the walls 3, 4, that is to say by an oblique position of the storage element 8 relative to the walls 3, 4, a particularly advantageous load transmission between the walls 3, 4 via the storage element 8 can be realized, as a result of which the mechanical load capacity of the storage housing 2 can be particularly improved. The load transmission can take place in particular via a structure of the storage element 8 that is referred to as a cell can, for example.In the exemplary embodiment, it is provided that the first wall 3 is arranged on an underside 10 of the storage housing 2 pointing downward in the vehicle vertical direction 9, and the second wall 4 is arranged on an upper side 11 of the storage housing 2 pointing upward in the vehicle vertical direction 9.In the exemplary embodiment, it is provided that at least one further storage element 12 arranged between the first and the second wall 3, 4, in particular between the fourth and the fifth wall 5, 6, is arranged in the receiving space 7, wherein in this case a plurality of further storage elements 12, 13, 14 are preferably arranged in the receiving space 7 between the first and the second wall 3, 4, in particular between the third and the fourth wall 5, 6. For example, at least one of the further storage elements 12, 13, 14, for example at least one second of the storage elements 12, extends obliquely to the first and the second wall 3, 4. in particular when the storage housing 2 is acted upon mechanically, the third and the fourth wall 3, 4, in particular for stabilizing the storage housing 2, are supported or supportable against one another at least indirectly, in particular directly, via at least one of the further storage elements 12, 13, 14, in particular via the second storage element 12. The second storage element 12 and the storage element 8, which can be referred to in particular as the first storage element 8, extend, for example, obliquely, perpendicularly or parallel to one another. Furthermore, a plurality of the second storage elements 12 can be provided, which can be arranged spaced apart from one another. For example, the first storage element 8 is arranged between two of the second storage elements 12. Thus, the second storage element 12 or the second storage elements 12, in particular equivalent to the first storage element 8, are an oblique storage element or oblique storage elements. The electrical energy store 1 can thus have a plurality of oblique storage elements, in particular in the form of the first and the second storage element 8, 12. As a result, the storage housing can be supported via the storage elements 8, 12 in a plurality of, in particular in all, spatial directions.In the exemplary embodiment shown in FIG. 1, at least one of the further storage elements 12, 13, 14, for example at least a third of the storage elements 13, extends perpendicularly to the first or second wall 3, 4 and in particular at least substantially in the vertical direction 9 of the vehicle. For example, the third storage element 13 extends at least substantially parallel to the third and fourth walls 5, 6. The third and fourth walls 3, 4 can be supported or supportable against one another via the third storage element 13.In the exemplary embodiment shown in FIG. 1, at least one of the further storage elements 12, 13, 14, for example at least a fourth of the storage elements 14, is arranged at least in regions in an intermediate space 15. This storage element, in particular the fourth storage element 14, extends obliquely or perpendicularly to the first storage element 8, for example at least substantially in the vehicle longitudinal direction and / or in the vehicle transverse direction. For example, the fourth storage element 14 extends perpendicular to the third and fourth walls 5, 6. the intermediate space 15 extends at least in regions, in particular predominantly or completely, at least between the first storage element 8 and at least one of the walls 3, 4. As a result, gaps resulting from the oblique positions can be filled with the fourth storage element 14, as it were, as a result of which an installation space of the storage housing 2, in particular a size of the receiving space 7, can be utilized particularly efficiently. Thus, the fourth storage element 14 can be understood to mean, in particular, a cell rotated with respect to the first storage element 8, which can be provided for optimizing the installation space.In the exemplary embodiment, it is provided that the storage housing 2 is filled at least in regions with a foam 16. Preferably, it is provided that the foam 16 extends at least between one of the storage elements 8, 12, 13, 14, for example the first storage element 8, and at least one of the turns 3, 4. Furthermore, it is provided that the first, the second, the third and / or the fourth storage element 8, 12, 13, 14 is galvanically separated from the first or second wall 3, 4 and in particular from the fourth and the fifth wall 5, 6.FIGS. 2 and 3 show the electrical energy store 1 in a schematic and perspective partial view according to a further embodiment, in which the electrical energy store 1 has at least one cell connector 17. By way of the cell connector 17, for example, the first storage element 8 and at least one of the further storage elements 12, 13, 14, in particular at least one of the second storage elements 12, or a further storage element 18 formed separately from the storage elements 8, 12, 13, 14, which can be referred to in particular as a fifth storage element 18, are electrically connected to one another. In the respective exemplary embodiment shown in FIGS. 2 and 3, four fifth memory elements 18 are shown by way of example in each case. The respective fifth storage element 18 is arranged in the receiving space 7, in particular at least between the walls 3, 4. Preferably, the first and the second wall 3, 4 can be supported or can be supported on one another at least indirectly, in particular directly, via the respective fifth storage element 18. The respective fifth storage element 18 preferably extends obliquely to the first and the second wall 3, 4.In the exemplary embodiment shown in FIGS. 2 and 3, the first storage element 8 and the respective fifth storage element 18 run parallel to one another. Alternatively, it can be provided that the first storage element 8 and the respective fifth storage element 18 run obliquely or perpendicularly to one another, which is schematically illustrated in FIG. 3 by means of arrows 17 a.In the exemplary embodiment, the cell connector 17 has a respective contact region 19 against which the respective storage element 8, 18 bears in its radial direction 20. For example, the respective contact region 19 surrounds the respective storage element 8, 18 at least partially, in particular completely, in the circumferential direction of the respective storage element 8, 18. The cell connector 17 can be formed in one part or in multiple parts.FIG. 3 shows a multipart embodiment of the cell connector 17, in which the cell connector 17 has, for example, a respective second contact region 21, via which the respective storage element 8, 18 bears in its radial direction 20. In particular, the cell connector 17 can be designed at least in regions in the form of a shell, that is to say can have one or more shells, wherein the shells or the shell can be formed by the first and / or the second contact region 19, 21.Overall, it can be seen that in the form of the storage element 8 or in the form of the storage elements 8, 12, 18 push struts can be realized in the electrical energy store 1 via oblique cells, in particular by means of the foam 16.FIG. 4 shows the electrical energy store 1 in a schematic partial sectional view according to a further embodiment, in which the electrical energy store 1 has at least one cooling element 22 which is arranged at least in regions in the receiving space 7 and through which a coolant can flow, which cooling element can be referred to in particular as first cooling element 22. The first cooling element 22 extends obliquely to the first and the second wall 3, 4, which are supported or supportable against one another, in particular at least indirectly or directly, via the first cooling element 22. In the exemplary embodiment shown in FIG. 4, the first cooling element 22 is designed as a side cooler for the storage element 8.FIG. 5 shows the electrical energy store 1 in a schematic and perspective partial sectional view according to a further embodiment, in which at least one cooling element 23 through which a coolant can flow is arranged in the receiving space 7, which cooling element can be referred to in particular as a second cooling element 23. In order to be able to particularly increase the mechanical load capacity of the electrical energy store 1 or of the store housing 2, the storage element 8 is supported or supportable on at least one of the walls 3, 4, for example on the second wall 4, and is in particular connected to at least one of the walls 3, 4, for example a second wall 4, via the second cooling element 25. The second cooling element 23, which is referred to in particular as a cooler, is designed, for example, as a storage cover of the storage housing 2 or the second cooling element 23 is part of the storage cover. In the exemplary embodiment shown in FIG. 5, the second cooling element 23 adjoins the storage element 8 in the axial direction of the storage element 8, in particular at one end. For example, the second cooling element 23 is arranged between the storage element 8 and at least one of the walls 3, 4, for example the second wall 4. For example, the second cooling element 23, in particular on an end face of the storage element 8, bears flat against the storage element 8.In order to be able to connect the storage element 8 via the second cooling element 23 to at least one of the walls 3, 4 in a particularly advantageous manner, the second cooling element 23 has, for example, at least one first cooling element part 24 and at least one second cooling element part 25 which extends obliquely to the first cooling element part 24 and adjoins, for example, the first cooling element part 24 in particular directly. For example, the second cooling element 23 is connected above the first cooling element part 24, in particular directly, to at least one of the walls 3, 4, for example the second wall 4. For example, the second cooling element 23 is connected to the storage element 8 via the second cooling element part 25, in particular directly. For example, at least one third cooling element part 26, in particular directly, adjoins the second cooling element part 25, which cooling element part preferably extends obliquely or perpendicularly to the second cooling element part 25, wherein the second cooling element 25 is preferably connected at least indirectly, in particular directly, to at least one of the walls 3, 4, for example to the second wall 4, via the third cooling element part 26. For example, the first cooling element part 24 connects at one end to the second cooling element part 25 and the third cooling element part 26 connects at the other end to the second cooling element part 25. Thus, the inclined position of the storage element 8 can be bridged by shaping the second cooling element 25 so to speak in order to connect the inclined storage element 8 to the wall 3 or 4 running straight. Preferably, the coolant can flow through the first cooling element part 24, the second cooling element part 25 and the third cooling element part 26.In the exemplary embodiment shown in FIG. 5, the electrical energy store 1 has at least one holding device 27, by means of which the storage element 8, in particular directly, is connected to at least one of the walls 3, 4, in particular to the first wall 3. The holding device 27 is preferably formed separately from the second cooling element 23. For example, the holding device 27 is arranged, in particular axially, at one end on the storage element 8 and the second cooling element 23 is arranged, in particular axially, at the other end on the storage element 8.For example, at least one of the storage elements 8, 12, 13, 14, 18, in particular the first, the second, the third, the fourth and / or the fifth storage element 8, 12, 13, 14, 18, is bonded to the storage housing 2, in particular to at least one of the walls 3, 4. This is illustrated in FIG. 1 by way of example for the first storage element 8. Thus, in the exemplary embodiment shown in FIG. 1, adhesive 28 is provided, via which the first storage element 8 is glued to at least one of the walls 3, 4, in particular to the first wall 3.List of reference characters1 Electrical energy store 2 Storage housing 3 First wall 4 Second wall 5 Third wall 6 Fourth wall 7 Receiving space 8 First storage element 9 Vehicle vertical direction 10 Underside 11 Upper side 12 Second storage element 13 Third storage element 14 Fourth storage element 15 Intermediate space 16 Foam 17 Cell connector 17 a Pfeil 18 Fifth storage element 19 Contact region 20 Radial direction 21 Second contact region 22 First cooling element 23 Second cooling element 24 First cooling element part 25 Second cooling element part 26 Third cooling element part 27 Holding device 28 Adhesive

Claims

Electrical energy store (1) for a motor vehicle, having a storage housing (2) which at least partially delimits at least one receiving space (7), and having at least one storage element (8) which is arranged in the receiving space (7) between walls (3, 4) of the storage housing (2), wherein the storage element (8) extends obliquely to the walls (3, 4) and the walls (3, 4) are supported at least indirectly on one another via the storage element (8), and one of the walls (3, 4) is arranged on an underside (10) of the storage housing (2) which faces downward in the vehicle vertical direction (9) and another of the walls (4) is arranged on an upper side (11) of the storage housing (2) which faces upward in the vehicle vertical direction (9), and wherein at least one further storage element (14) which is arranged in the receiving space (7) and extends obliquely or perpendicularly to the storage element (8) is provided, characterized in that, the further storage element (14) is arranged at least predominantly in an intermediate space (17) which extends between the storage element (8) and one of the walls (3, 4).Electrical energy store (1) according to Claim 1, characterized in that the storage housing (2) is filled at least in regions with a foam (16), which preferably extends at least between the storage element (8) and at least one of the walls (3, 4).Electrical energy store (1) according to Claim 1 or 2, characterized in that the storage element (8) is galvanically separated from the walls (3, 4).Electrical energy store (1) according to one of the preceding claims, characterized byat least one further storage element (12) which is arranged in the receiving space (7) between the walls (3, 4) of the storage housing (2) and extends obliquely to the walls (3, 4) and the walls (3, 4) are supported at least indirectly on one another via the further storage element (12), wherein the storage element (8) and the further storage element (12) extend obliquely, perpendicularly or parallel to one another.Electrical energy store (1) according to Claim 4, characterized byat least one cell connector (17), via which the storage element (8) and the further storage element (12, 18) are electrically connected to one another.Electrical energy store (1) according to Claim 5, characterized in that the cell connector (17) has a respective bearing region (19), against which the respective storage element (8, 18) bears in its respective radial direction.Electrical energy store (1) according to one of the preceding claims, characterized byat least one cooling element (22) which is arranged in the receiving space (7) and through which a coolant can flow and extends obliquely to the walls (3, 4) which are supported on one another via the cooling element (22).Electrical energy store (1) according to one of the preceding claims, characterized byat least one cooling element (23) which is arranged in the receiving space (7) and through which a coolant can flow, and by means of which the storage element (8) is supported on at least one of the walls (3, 4).

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