CN111312946A

CN111312946A - Battery module with a plurality of battery cells

Info

Publication number: CN111312946A
Application number: CN201911266676.4A
Authority: CN
Inventors: C.G.普弗吕格; M.施密特
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2018-12-12
Filing date: 2019-12-11
Publication date: 2020-06-19
Also published as: DE102018221477A1

Abstract

A battery module is proposed, having a plurality of battery cells, in particular lithium ion battery cells, wherein the battery module has a separating element arranged between a first battery cell and a second battery cell, the separating element comprising a carrier element having a first surface facing the first battery cell and a second surface facing the second battery cell. The first surface includes a plurality of first compensation elements configured to be elastically deformable and respectively arranged to be in contact with the first battery cells. The second surface also includes a plurality of second compensation elements configured to be elastically deformable and each disposed in contact with the second battery cell. Furthermore, a first flow space is formed between the separating element and the first battery cell for the tempered fluid to flow through, and a second flow space is formed between the separating element and the second battery cell for the tempered fluid to flow through.

Description

Battery module with a plurality of battery cells

Technical Field

The invention relates to a battery module having a plurality of battery cells according to the independent claim. Furthermore, the use of such a battery module is also subject of the present invention.

Background

DE 102015112683 a1 discloses a cooling plate construction for cooling battery cells.

Disclosure of Invention

According to the invention, a battery module is provided, having a plurality of battery cells, in particular lithium ion battery cells. In this case, the battery module has a separating element arranged between the first battery cell and the second battery cell, which separating element comprises a carrier element having a first surface facing the first battery cell and a second surface facing the second battery cell. The first surface includes a plurality of first compensation elements configured to be elastically deformable and respectively arranged to be in contact with the first battery cells. Further, the second surface includes a plurality of second compensation elements configured to be elastically deformable and respectively arranged to be in contact with the second battery cells. Furthermore, a first flow space is formed between the separating element and the first battery cell for the tempered fluid to flow through, and a second flow space is formed between the separating element and the second battery cell for the tempered fluid to flow through.

The battery module may be configured to accommodate a plurality of battery cells, and may be used, for example, in a Vehicle, particularly in an Electric Vehicle (EV) and/or a Hybrid Electric Vehicle (HEV). Such vehicles use, in particular, high-energy and high-power battery systems, so that the electric drive machine can output the desired driving power. For example, such a battery may comprise one or more battery packs, wherein the battery packs comprise in particular a plurality of battery modules, wherein a battery module may also comprise a plurality of cells or battery cells.

The battery module housing can be designed in particular to accommodate a battery module and thus in particular also a plurality of battery cells. In other words, the respective battery cells may be interconnected into a battery module. The battery modules are interconnected into battery packs and further interconnected into batteries or battery systems. In order to utilize the installation space of a large number of different vehicle installation spaces, variable module sizes can be used.

As the electric energy storage device (EES), for example, a battery pack having a lithium ion battery cell or a lithium polymer battery cell may be used. Lithium-ion or lithium-polymer battery cells can generate heat as a result of chemical conversion processes, in particular during rapid energy output and energy absorption. The more powerful the battery pack, the more heat it generates. Thus, the battery module may in particular comprise an efficient active thermal management system. Whereby the battery unit may be cooled and/or heated. The optimum operating temperature of the lithium ion battery system or the lithium polymer battery cell is about +5 ℃ to +35 ℃. Starting from an operating temperature of about +40 ℃, the service life of the battery cell may be shortened. Therefore, in order to be able to meet the service life requirement of approximately 8 to 10 years, in particular, sufficient thermal conditioning of the battery is required. The battery cell should be maintained in a thermally non-critical state below +40 ℃ in all operating conditions. To achieve synchronization of the aging of the battery cells, the temperature gradient between different battery cells should preferably only be about 5 kelvin. Battery heating and battery de-heating or battery cooling is particularly configured for liquid tempering using a tempering fluid, particularly a water/glycol mixture. The tempering fluid can flow through the flow space formed. The supply to the flow space can be effected, for example, by means of a tempering fluid line (Verschlauchung) with corresponding further components in the cooling circuit.

The advantage of the invention is that the cell can be prestressed, in particular by means of a synthetic element. In particular, volume changes of the battery cells, for example so-called cell swelling, can thereby be compensated. In particular, shape and position tolerances can thereby also be compensated for. In addition, in particular, adjacent battery cells can be prevented from contacting each other. In other words, a distance between two adjacent battery cells may be ensured such that the battery cells do not contact each other. Thereby, an electrical insulation can be achieved.

Another advantage of the invention is that the flow space, in other words the space between adjacent cells, can be divided. Thereby, a constant fluid film between adjacent battery cells may be ensured. In other words, it can be ensured that a fluid film is maintained between two adjacent battery cells. This can prevent or reduce the co-heating of two adjacent battery cells, for example.

Preferably, a cost-effective integration of the tempering function and/or the compensation function in one component can be achieved. In addition, in particular, construction space can be saved. The described advantages make it possible to use the invention for pouch cells and prismatic cells. By means of the invention, in particular pressure losses, tolerance compensation between the battery cells and safe operation of the battery cells can be achieved. Tempering, in particular heat generation and/or cooling, of the battery module can thereby be ensured, as a result of which the long life of the battery cells in the battery module can be improved.

In an advantageous embodiment, the carrier element can be constructed from a metallic material or from a polymer material. This can improve the mechanical stability of the carrier element. Another advantage resides in simple processing of metallic or polymeric materials. In addition, a weight saving can be achieved in particular by means of the polymer material. For example, mechanical stability can be ensured by means of a metallic material.

In one development, the first and/or second plurality of compensation elements can each be formed from an elastomer material. The compensation element can thereby be in particular elastically deformable, whereby changes in the volume of the battery cell can be compensated for. Furthermore, shape tolerances and position tolerances can be compensated. Furthermore, the elastic material makes it possible to deform, which in particular can return to its original initial state. Advantageously, the elastomeric material may in particular be at least partially incompressible. Incompressibility refers to the property of a material that does not change its volume, i.e. cannot be compressed, under pressure at a constant temperature. This ensures that, in particular, a flow space is always present between the battery cells. In other words, it is possible to ensure that the fluid film is maintained between two adjacent battery cells. Tempering, in particular heat generation and/or cooling, of the battery module can thereby be ensured or ensured, as a result of which the long life of the battery cells in the battery module can be improved.

Advantageously, the first and/or second compensating elements can be connected to the carrier element in a form-fitting, material-fitting or force-fitting manner. This ensures that the compensating element is securely arranged on the carrier element. It is thus possible to ensure compensation for volume variations and for shape and position tolerances. Tempering, in particular heat generation and/or cooling, of the battery module can thereby be ensured, as a result of which the long life of the battery cells in the battery module can be improved.

In a further embodiment, the plurality of battery cells may be configured as prismatic battery cells, respectively. This makes it possible to easily construct the battery module and the battery cell arrangement, in particular.

Furthermore, the plurality of first compensation elements and/or the plurality of second compensation elements may each have a cross section arranged perpendicular to the shortest distance between the first battery cell and the second battery cell, wherein the cross section may have the shape of a ring, a circle, an ellipse, a triangle, a rectangle, or a square. In addition, in another embodiment, the plurality of first compensation elements and/or the plurality of second compensation elements may each be configured in the shape of a sphere, a cuboid, a cone, a cube, or an ellipse. In particular, it can thereby be ensured that volume changes of the battery cells can be reliably compensated for by means of the compensation element. It is furthermore ensured that an always present flow space is advantageously formed between the separating element and the adjacent battery cell or between two adjacent battery cells, so that a constant fluid film is formed between the separating element and the adjacent battery cell or between two adjacent battery cells. Cooling of the battery module can thereby be ensured, whereby the long life of the battery cells in the battery module can be improved.

In an advantageous embodiment of the invention, the first and second compensation elements can be arranged mirror-symmetrically to one another. By means of the proposed arrangement of the compensation element, in particular a compensation of volume changes of the battery cell can be ensured. For example, volume changes of the battery cell can be absorbed by means of the compensation element. Furthermore, a constant cooling and/or heating of the battery cells can be ensured, since in particular a constant flow space between adjacent battery cells is ensured. In this way, a constant fluid film between adjacent cells may be maintained. Tempering, in particular heat generation and/or cooling, of the battery module can thereby be ensured, as a result of which the long life of the battery cells in the battery module can be improved.

Preferably, the plurality of first compensation elements and/or the plurality of second compensation elements can be configured in particular to increase the turbulence and/or to deflect the tempering fluid flowing through the first flow space or through the second flow space, respectively, such that a heat transfer is configured between the tempering fluid and the first battery cell or the second battery cell. In particular, cooling and/or heating of the battery cell can thereby be ensured by means of the tempering fluid, wherein preferably the heat and/or cold of the battery cell can be dissipated by means of the tempering fluid. Tempering, in particular heat generation and/or cooling, of the battery module can thereby be reliably ensured, as a result of which the long life of the battery cells in the battery module can be improved.

In one development, the separating element can have a first region with a first or second compensating element of a first density and a second region with a first or second compensating element of a second density, wherein the first density has a higher value than the second density. In a further exemplary embodiment, the plurality of first compensation elements and/or the plurality of second compensation elements are arranged in a first configuration or in a second configuration relative to one another, such that a first flow channel, which is formed jointly by the plurality of first compensation elements, is formed in the first flow space and/or a second flow channel, which is formed jointly by the plurality of second compensation elements, is formed in the second flow space. The flow path for the tempering fluid can thus advantageously be predetermined. Preferably, a fluid flow, for example a defined fluid flow, can be formed or established by means of these compensation elements. In particular, a defined flow guidance of the tempering fluid can be configured. In other words, the tempering fluid can be deflected or directed in a defined direction by different arrangements of these compensating elements by means of different densities or different numbers. This ensures that, in particular, the battery cells are cooled and/or heated uniformly, so that tempering, in particular heating and/or cooling, of the battery module can be ensured. The long life of the battery cells in the battery module can thereby be improved.

Preferably, the carrier element also has at least one opening extending through the carrier element, so that the tempering fluid can flow through the carrier element between the first flow space and the second flow space. In other words, openings are introduced into the carrier element, wherein the tempering fluid can flow through these openings. The openings can also be embodied, for example, as channels. The tempering fluid can thereby advantageously be flowed, guided and/or deflected from one flow space to the other. Tempering, in particular heat generation and/or cooling, of the battery module can thereby be ensured, as a result of which the long life of the battery cells in the battery module can be improved.

Furthermore, a use of a battery module is proposed, wherein a tempering fluid flows through the first flow space and the second flow space, such that a direct contact is configured between the tempering fluid and the first battery cell or the second battery cell, and a plurality of battery cells have a temperature below 40 ℃, in particular between 5 ℃ and 35 ℃. Tempering, in particular heat generation and/or cooling, of the battery module can thereby be ensured, whereby the life of the battery cells in the battery module can be improved.

In one development, the battery module can be used such that the plurality of first and second compensation elements elastically absorb the volumetric deformation of the first and second battery cells. In particular, volume changes of the battery cells and shape and position tolerances of the battery cells can thereby be compensated. In addition, fluid flow between the battery cells can be ensured despite volume changes of the battery cells. This ensures that the battery module can be reliably cooled and/or heated, so that the functionality and/or the service life of the battery cells can be improved.

Furthermore, a separating element for a battery module is proposed, in particular the separating element for a battery module according to the invention which has just been described, wherein the separating element for example comprises a carrier element having a first surface and a second surface. The first surface may in particular comprise a plurality of first compensation elements which are configured to be elastically deformable and may each be arranged in contact with a first battery cell, while the second surface may comprise a plurality of second compensation elements which are configured to be elastically deformable and may each be arranged in contact with a second battery cell. By means of the separating element with these compensating elements, it is advantageously possible to compensate for variations in the volume of the battery cells and for shape tolerances and position tolerances of the battery cells. Furthermore, a fluid flow between the battery cells can be ensured, as a result of which the battery module can be tempered, in particular cooled and/or heated. The functionality and/or the long life of the battery cell can thereby be improved.

Drawings

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. For elements shown in the various figures and functioning similarly, the same reference numerals are used, wherein a repeated description of these elements is omitted.

Fig. 1 shows a schematic view of a battery module according to an embodiment of the invention in a cross-sectional view;

fig. 2 shows a schematic exploded view of a battery module according to an embodiment of the invention in a perspective view;

fig. 3 shows a schematic diagram of a battery module according to a first embodiment of the invention in a cross-sectional view;

fig. 4 shows a schematic diagram in cross-section of a battery module according to a second embodiment of the invention;

fig. 5 shows a schematic diagram of a battery module according to a third embodiment of the invention in a cross-sectional view;

fig. 6 shows a schematic diagram of a battery module according to a fourth embodiment of the invention in a cross-sectional view;

fig. 7 shows a schematic diagram of a battery module according to a fifth embodiment of the invention in a cross-sectional view;

fig. 8 shows a schematic view of a separating element according to a sixth embodiment of the invention in a sectional view;

fig. 9 shows a schematic view of a part of a separating element according to an embodiment of the invention in a sectional view;

fig. 10 shows a schematic view of a carrier element according to an embodiment of the invention in a perspective view;

fig. 11 shows a schematic view of a separating element according to an embodiment of the invention in a perspective view.

Detailed Description

Fig. 1 shows a schematic diagram of a battery module 20 according to an embodiment of the invention in a cross-sectional view. The battery module 20 has a battery module housing 22, wherein the battery module housing 22 is designed to accommodate a plurality of battery cells 24 and, in the exemplary embodiment shown in fig. 1, also a plurality of battery cells 24. In other words, a plurality of battery cells 24 may be disposed or housed within the battery module housing 22 and thus within the battery module 20. For the use of the battery module 20, the battery cells 24 can be connected to one another, for example in parallel or in series, wherein the individual battery cells 24 can be connected to one another in an electrically conductive manner, in particular by means of cell connectors. The battery module 20 may be used, for example, in a vehicle, particularly an Electric Vehicle (EV) and/or a Hybrid Electric Vehicle (HEV).

As the electric energy storage device (EES), for example, a battery pack having a lithium ion battery cell or a lithium polymer battery cell may be used. The optimum operating temperature of the lithium ion battery cell or the lithium polymer battery cell is about +5 ℃ to +35 ℃. Starting from an operating temperature of about +40 ℃, the service life of the battery cell may be shortened. Therefore, in order to be able to meet the service life requirement of approximately 8 to 10 years, in particular, sufficient thermal conditioning of the battery is required. In one development, the battery module can comprise a tempering system for this purpose, in particular, whereby the battery cells can be cooled and/or heated. The tempering system or thermal management system of the battery module may in particular be configured for liquid tempering using a tempering fluid, in particular a water/glycol mixture. The tempering fluid can flow through the flow space formed. The supply to the flow space can be effected, for example, by means of a tempering fluid line (Verschlauchung) with corresponding further components in the cooling circuit.

Furthermore, the battery module 20 has a separating element 26. The separating element 26 is arranged in particular between two battery cells 24, in particular between a first battery cell and a second battery cell. The separating element 26 may in particular comprise a carrier element having a first surface facing the first battery cell and a second surface facing the second battery cell. In one development, the carrier element can be constructed from a metallic material or from a polymer material. The separating elements 26 and the battery cells 24 are arranged in particular alternately.

Fig. 2 shows a schematic diagram of a battery module 20 according to an embodiment of the invention in a perspective view. The battery module 20 according to fig. 2 may be implemented according to the battery module 20 of fig. 1. In contrast to the battery module 20 according to fig. 1, the battery module 20 according to fig. 2 is shown in three dimensions in an exploded type or exploded view.

In this advantageous embodiment according to fig. 2, the battery module housing 22 further comprises in particular a first housing part 28 which accommodates the battery cells 24 and the separating element 26, and a second housing part 30 which is arranged on the first housing part 28 such that the battery module housing 22 is closed. The second housing part 30 can be embodied in particular as a cover 30. In particular, an opening 32 can be introduced into the second housing part 30, wherein in particular the voltage of the battery module 20 or of the individual battery cells 24 can be tapped off by means of the opening 32. The second housing part 30 is arranged on the first housing part 28 corresponding to the arrow 33. In one development, the separating elements 26 can be arranged between the battery cells 24 in the battery module 20 according to a sedimentation basin (Setzkasten).

In this advantageous embodiment, the battery module 20 also has, in particular, a fastening element 34. The fixing element 34 may in particular be arranged such that the battery cell 24 can be fixed by means of said fixing element. Preferably, the fixing element 34 is arranged between the battery module housing 22, in particular the first housing part 28, and the battery cell 24.

Furthermore, the battery module 20 and/or the battery module housing 22 and/or the first housing part 28 according to fig. 2 have an inlet opening 36, wherein a tempering fluid can be introduced into the battery module 20 corresponding to the arrow 38 by means of the inlet opening 36. The tempering fluid can be guided in particular within the battery module, so that the battery cells can be optimally tempered, in particular cooled and/or heated. The tempering fluid can be discharged from the battery module 20 corresponding to the arrow 40, in particular via a discharge opening. The arrangement of the inlet opening 36 and the outlet opening can be designed variably and is not limited to the position shown in fig. 2.

Fig. 3 shows a schematic diagram of a battery module 20 according to an embodiment of the invention in a cross-sectional view. The battery module 20 according to fig. 3 may be implemented according to the battery module 20 of fig. 1 and/or according to the battery module 20 of fig. 2. The battery module 20 is shown in fig. 3, in which the battery cells are shown in their initial positions. In the initial position, the battery cells are therefore the battery module in a state before the battery module is pressed or in a state before the prestressing force required for setting the battery module.

The battery module 20 according to fig. 3 has a plurality of

battery cells

42, 44, in particular lithium-ion battery cells. In one development, the

battery cells

42, 44 can be designed, for example, as prismatic battery cells 47. In this advantageous embodiment, the battery module 20 has a first battery cell 42 and a second battery cell 44. The first battery cell 42 has a first voltage tap 46 for tapping off the voltage of the first battery cell 42. The second battery cell 44 has a second voltage tap 48 for tapping off the voltage of the second battery cell 44. The first voltage tap 46 and the second voltage tap 48 may be connected to each other in an electrically conductive manner.

Furthermore, the battery module 20 has a separating element 26 arranged between the first battery cell 42 and the second battery cell 44. The separating element 26 comprises in particular a carrier element 52 having a first surface 54 facing the first battery cell 42 and a second surface 56 facing the second battery cell 44. The first surface 54 includes a plurality of first compensation elements 58 configured to be elastically deformable and respectively disposed in contact with the first battery cells 42. The second surface 56 includes a plurality of second compensation elements 60 configured to be elastically deformable and respectively disposed in contact with the second battery cells 44. In other words, the first surface 54 has a plurality of first compensation elements 58 configured to be elastically deformable and each arranged in contact with the first battery cell 42, wherein the second surface 56 has a plurality of second compensation elements 60 configured to be elastically deformable and each arranged in contact with the second battery cell 44. In other words, the first compensation element 58, which is configured to be elastically deformable, is arranged on the first surface 54 of the carrier element 52 such that the first compensation element 58 contacts the first battery cell 42. Furthermore, a second compensation element 60, which is configured to be elastically deformable, is arranged on the second surface 56 of the carrier element 52, such that the second compensation element 60 contacts the second battery cell 44.

The carrier element 52 may advantageously be constructed from a metallic material or from a polymeric material. Furthermore, the first and/or second plurality of compensating

elements

58, 60 are each constructed from an elastomeric material. The first compensation elements 58 and/or the second compensation elements 60 can be connected to the carrier element 52, in particular in a form-fitting, material-fitting or force-fitting manner, respectively. For example, the compensating

elements

58, 60 can be connected to the carrier element 52 and/or fixed on the carrier element 52 by means of fixing means and/or by means of an adhesive (for example a liquid adhesive or an adhesive tape).

The first and/or second plurality of compensating

elements

58, 60 in particular each have a cross section which is arranged perpendicular to the shortest distance between the first and

second battery cells

42, 44. The cross section may for example have the shape of a circle, an ellipse, a triangle, a rectangle or a square. In other words, the cross section of the compensating

elements

58, 60 can be configured, for example, as a ring, a circle, an ellipse, a triangle, a rectangle or a square. In one development, the first compensation elements 58 and/or the second compensation elements 60 can each be of spherical, cuboid, conical, cubic, elliptical shape. In other words, the compensating

elements

58, 60 can be designed as spheres or spheres, cuboids or cuboids, cones or cones, cuboids and/or cylinders. In a first implementation, all of the compensating

elements

58, 60 may have the same shape. In one development, the compensation element can be configured to have different shapes. In this advantageous embodiment, the compensating

elements

58, 60 are embodied, for example, as conical, wherein the outer surface of the cone of the compensating

elements

58, 60 is embodied, in particular, as convex.

Furthermore, in one embodiment, the first and

second compensation elements

58, 60 are arranged mirror-symmetrically to one another. The mirror axis may in particular extend along the carrier element 52. In other words, the plurality of first compensation elements 58 may be arranged mirror-symmetrically to the plurality of second compensation elements 60 about a mirror axis, in particular about a mirror axis through the carrier element 52. In other words, the plurality of first compensation elements 58 may be arranged such that the plurality of first compensation elements 58 is configured as a mirror image of the plurality of second compensation elements 60 on the respective mirror axis, in particular a mirror axis through the carrier element 52.

Furthermore, a first flow space 62 for the tempered fluid to flow through is formed between the separating element 26 and the first battery cell 42, and a second flow space 64 for the tempered fluid to flow through is formed between the separating element 26 and the second battery cell 44. In other words, the separating element 26 is arranged between at least two

adjacent battery cells

42, 44, wherein in particular two

flow spaces

62, 64, in particular a first flow space 62 and a second flow space 64, are formed by means of the separating element 26. In other words, the partition member 26 divides or partitions the region between the adjacent two battery cells into two

flow spaces

62, 64. The

flow spaces

62, 64 can also be closed by the battery module housing. In other words, the

flow spaces

62, 64 can be closed by means of the battery module housing.

In particular, a tempering fluid can flow through the

flow spaces

62, 64, wherein the tempering fluid is in particular designed to temper the

battery cells

42, 44 and in particular to conduct heat and/or cold away from the

battery cells

42, 44. For this purpose, the tempering fluid flows in particular around the compensating

elements

58, 60. The compensating

elements

58, 60 can in a further embodiment be designed such that the tempering fluid can flow according to a predetermined trajectory.

Furthermore, the plurality of first compensation elements 58 and/or the plurality of second compensation elements 60 may be configured to increase turbulence of the tempering fluid flowing through the first flow space 62 or the second flow space 64, respectively. Additionally or alternatively, in one development, the tempering fluid flowing through the first flow space 62 or through the second flow space 64 can be deflected, so that a heat transfer between the tempering fluid and the first battery cell or the second battery cell can be configured and/or improved. In other words, for example, the turbulence of the tempering fluid can be increased by means of the compensating

elements

58, 60, so that the tempering and in particular the heat transfer between the tempering fluid and the battery cell can be improved. For example, the flow speed of the tempering fluid can be adjusted in a defined manner, for example the flow speed is increased, and/or turbulent eddies can be generated in the flow of the tempering fluid. This can improve, in particular, the heat transfer between the tempering fluid and the battery cell.

In this advantageous embodiment, the compensating

elements

58, 60 are distributed uniformly over the carrier element 52. In other words, the compensating

elements

58, 60 have a uniform density in the region above the separating element 52.

The battery module 20 with the

battery cells

42, 44 and the separating element 26 can be used, in particular, for: a tempering fluid is flowed through the first flow space 62 and the second flow space 64, such that a direct contact is formed between the tempering fluid and the first battery cell 42 and the second battery cell 44, and the plurality of

battery cells

42, 44 have a temperature below 40 ℃, in particular a temperature between 5 ℃ and 35 ℃. In other words, by means of the battery module 20 and in particular by means of the separating element 26 and by means of the configured

flow spaces

62, 64, the

battery cells

42, 44 in the battery module 20 can be tempered and in particular have a temperature of less than 40 ℃, in particular a temperature of between 5 ℃ and 35 ℃.

Due to the elastic deformability of the

compensation elements

58, 60, the volumetric deformation of the

battery cells

42, 44, in particular of the first battery cell 42 and the second battery cell 44, is elastically absorbed by the plurality of first compensation elements 58 and/or by the plurality of second compensation elements 60.

The separating element 26 can also be referred to as an intermediate plate. The separating element can be designed in particular as an elastomer-metal composite part or as an elastomer-plastic composite part. The connection between the elastomer and the metal or plastic can be designed to be positive-fit or non-positive-fit, wherein the composite part can be extruded or assembled from individual parts.

Fig. 4 shows a schematic diagram of a battery module 20 according to an embodiment of the invention in a cross-sectional view. The battery module 20 according to fig. 4 may be implemented according to the battery module 20 of fig. 3. In contrast to the battery module 20 according to fig. 3, the battery module 20 according to fig. 4 is designed in a nominally pressed state. In other words, the battery cells are arranged or pressed with a defined distance between each other. In other words, fig. 4 shows the initial constructional prestress required in particular in the case of pouch cells and prismatic cells. By means of the prestress, it is ensured that the compensating

elements

58, 60 contact the battery cells. For example, it is thereby ensured that a majority of the first compensation element 58 contacts the first battery cell 42 and/or a majority of the second compensation element 60 contacts the second battery cell 44. In the compressed state, the

battery cells

42, 44 and thus the battery module 20 are in a state in which the pre-stress required for the battery module 20 is set.

Fig. 5 shows a schematic diagram of a battery module 20 according to an embodiment of the invention in a cross-sectional view. The battery module 20 according to fig. 5 may be implemented according to the battery module 20 of fig. 3 and/or according to the battery module 20 of fig. 4. Unlike the battery module 20 according to fig. 3, the battery module 20 according to fig. 5 is shown in a compressed state, and the

battery cells

42, 44 of the battery module 20 according to fig. 5 are shown in an expanded state. Unlike the battery module 20 according to fig. 4, the

battery cells

42, 44 of the battery module 20 according to fig. 5 are shown in an inflated state. In other words, the

battery cells

42, 44 bulge out, in particular due to the charging process and/or the discharging process of the

battery cells

42, 44. In other words, the sides of the

battery cells

42, 44 which are arranged parallel to the separating element 26 are convex. Swelling of the

battery cells

42, 44 may occur particularly at the beginning of the Life cycle of the

battery cells

42, 44, such as at the beginning of Life (BOL). At this time, no deformation due to aging occurred.

The elastically designed compensation element compensates for the expansion of the

battery cells

42, 44. In other words, the elastically designed compensating

elements

58, 60 can provide the required space in the event of expansion of the

battery cells

42, 44, and at the same time maintain a corresponding restoring force. Due to the incompressibility of the elastomeric material of the

compensation elements

58, 60, the

battery cells

42, 44 may be prevented from making electrical contact with each other. This prevents a short circuit of the

battery cells

42, 44, since in particular a sufficient insulation layer is formed by means of the

compensation elements

58, 60. Furthermore, despite the expanded state of one or

more battery cells

42, 44, two

flow spaces

62, 64 are still present for the tempered fluid to flow through, whereby tempering of the

battery cells

42, 44 can be ensured.

Fig. 6 shows a schematic diagram of a battery module 20 according to an embodiment of the invention in a cross-sectional view. The battery module 20 according to fig. 6 may be implemented according to the battery module 20 of fig. 3 and/or according to the battery module 20 of fig. 4. Unlike the battery module 20 according to fig. 3, the battery module 20 according to fig. 6 is shown in a compressed state, and the

battery cells

42, 44 of the battery module 20 according to fig. 6 are shown in an expanded state. Unlike the battery module 20 according to fig. 4, the

battery cells

42, 44 of the battery module 20 according to fig. 6 are shown in an expanded state. In other words, the

battery cells

42, 44. In other words, the sides of the

battery cells

42, 44 may occur in particular at the End of the Life cycle of the

battery cells

42, 44, for example at the End of Life (EoL).

battery cells

42, 44. In other words, the elastically designed compensating

elements

58, 60 can provide the required space in the event of expansion of the

battery cells

42, 44, while maintaining the corresponding restoring forces. Due to the incompressibility of the elastomeric material of the

compensation elements

58, 60, the

battery cells

42, 44 may be prevented from contacting each other. This prevents a short circuit of the

battery cells

compensation elements

58, 60. Furthermore, despite the expanded state of one or

more battery cells

42, 44, two

flow spaces

battery cells

42, 44 can be ensured.

Fig. 7 shows a schematic diagram of a battery module 20 according to an embodiment of the invention in a cross-sectional view. Unlike the battery module 20 according to fig. 3, the battery module 20 according to fig. 7 is shown in a compressed state, and the

battery cells

42, 44 of the battery module 20 according to fig. 7 are shown in an expanded state. In other words, the

battery cells

42, 44 bulge out, for example, as a result of a charging process and/or a discharging process of the

battery cells

42, 44. In other words, the sides of the

battery cells

42, 44 which are arranged parallel to the separating element 26 project.

The compensation element compensates for expansion of the

battery cells

42, 44. In other words, the

compensation elements

58, 60 may provide the required space in case of expansion of the

battery cells

42, 44, while maintaining the respective restoring force. The compensating

elements

58, 60 can in particular be deformed with different strengths. Thus, expansions having different strengths in different regions are compensated by the

compensation elements

58, 60 accordingly. In other words, it is shown in fig. 7 how the separating element can compensate for tolerances in shape and position.

Due to the incompressibility of the elastomeric material of the

compensation elements

58, 60, the

battery cells

42, 44 are prevented from contacting each other. This prevents short-circuiting of the

battery cells

42, 44, since in particular sufficient insulation is present, in particular of the

compensation elements

58, 60. In addition, although the

battery cells

42, 44 are in the expanded state, there is a flow space for the tempered fluid to flow through, whereby the tempering of the battery cells can be ensured.

Fig. 7a shows a schematic view of the battery module 20 in a cross-sectional view, wherein the first battery cell 42 is shown in an expanded, deformed state and the second battery cell 44 is shown in a normal, undeformed state. The first compensation element 58 compensates for the swelling or bulging of the first battery cell 42. The second compensating element 60 can accordingly be held in the original state or in the pre-stressed state.

Fig. 7b shows a schematic view of the battery module 20 in a cross-sectional view, wherein the first battery cell 42 is shown in a relatively slightly swollen, deformed state, and the second battery cell 44 is shown in a swollen, deformed state of different strength. In other words, the swelling of the second battery cell 44 at different regions of the side of the second battery cell 44 has different strengths or different sizes. The first compensation element 58 compensates for the swelling or bulging of the first battery cell 42. The second compensation element 60 compensates for the different strengths of the swelling or bulging of the second battery cell 44 accordingly.

Fig. 8 shows a schematic representation of a separating element 26 according to an embodiment of the invention in a sectional view. The separating element 26 according to fig. 8 can be implemented with the separating element 26 according to fig. 3 and/or with the separating element 26 according to fig. 4, 5, 6 and/or 7. The separating element 26 comprises in particular a carrier element 52 having a first surface 54 which can face the first battery cell 42 and a second surface 56 which can face the second battery cell 44. The carrier element 52 according to fig. 8 can be implemented according to the carrier element 52 of fig. 3.

First surface 54 has a plurality of first compensation elements 58 configured to be elastically deformable and respectively disposable in contact with first battery cell 42, wherein second surface 56 has a plurality of second compensation elements 60 configured to be elastically deformable and respectively disposable in contact with second battery cell 44. The first compensation element 58 according to fig. 8 can be implemented according to the first compensation element 58 of fig. 3. The second compensation element 60 according to fig. 8 can be implemented according to the second compensation element 60 of fig. 3.

Fig. 8a shows a separating element 26 with a carrier element 52, wherein the carrier element 52 is designed as a continuous element. In other words, the carrier element 52 according to fig. 8a has no openings.

Fig. 8b shows a separating element 26 with a carrier element 52, wherein the carrier element 52 also has at least one opening 66 which is penetrated by the carrier element, so that the tempering fluid can flow through the carrier element 52 between the first flow space and the second flow space. The carrier element 52 may have one or more openings 66 therethrough. In this advantageous embodiment according to fig. 8b, the carrier element has a plurality of openings 66. In one development, the openings 66 can be introduced uniformly on the carrier element and/or in a defined pattern and/or in an undefined pattern.

Fig. 9 shows a schematic representation of a separating element 26 according to an embodiment of the invention in a sectional view. The separating element 26 according to fig. 9 can be implemented as the separating element 26 according to fig. 3 and/or as the separating element 26 according to fig. 8 and/or as the separating element 26 according to fig. 4, 5, 6 and/or 7. In contrast to the separating element 26 according to fig. 3 and/or 8 and/or 4, 5, 6 and/or 7, the compensating

elements

58, 60 have a different shape. The first and/or second plurality of compensating

elements

second battery cells

42, 44. In this embodiment, the first compensation element 58 and the second compensation element 60 of the separating element 26 have the same shape. In one development, the first compensation element 58 and the second compensation element 60 of the separating element 26 can be formed in different shapes.

Fig. 9a shows a separating element 26 with compensating

elements

58, 60 which have an oval cross section. In other words, the cross section of the compensating

elements

58, 60 is designed as an oval. In particular, the

compensation elements

58, 60 form an elliptical shape. In other words, the compensating

elements

58, 60 are designed as ellipses.

In a further embodiment, the compensating

elements

58, 60 is embodied, in particular, as convex.

Fig. 9b shows a separating element 26 with compensating

elements

58, 60, the compensating

elements

58, 60 having a rectangular and/or square cross section. In other words, the cross section of the compensating

elements

58, 60 is configured as a rectangle and/or a square. In particular, the

compensation elements

58, 60 form a rectangular parallelepiped shape. In other words, the

compensation elements

58, 60 are configured as rectangular parallelepipeds.

In a further advantageous embodiment, the

compensation elements

58, 60 are of cuboid cross-sectional configuration. In particular, the

compensation elements

58, 60 form a cubic shape. In other words, the compensating

elements

58, 60 are configured as cubes.

In a further advantageous embodiment, the cross section of the compensating

elements

58, 60 is designed as a cylinder. The compensating

elements

58, 60 are in particular formed in a cylindrical shape. In other words, the compensating

elements

58, 60 are configured as cylinders.

In one development, the compensating

elements

58, 60 can have a recess 67. In this advantageous embodiment, the compensating

elements

58, 60 have conical and/or pyramidal recesses 67 on the side of the compensating

elements

58, 60 opposite the carrier element 52. In other words, conical and/or pyramidal recesses 67 or depressions 67 are introduced on the side of the compensating

elements

58, 60 opposite the carrier element 52.

Fig. 9c shows a separating element 26 with a compensating

element

58, 60 having a circular (rund) and/or annular (kreisf ö rmig) cross section, in other words the cross section of the compensating

element

58, 60 is designed as a circle and/or as an annulus, in particular the compensating

element

58, 60 forms a spherical shape, in other words the compensating

element

58, 60 is designed as a sphere.

Fig. 9d shows a separating element 26 with compensating

elements

58, 60, the compensating

elements

58, 60 having a triangular cross section. In other words, the cross section of the compensating

elements

58, 60 is triangular. In particular, the compensating

elements

58, 60 form a conical and/or pyramidal shape. In other words, the compensating

elements

58, 60 are configured as cones and/or pyramids. In a development, the

compensation elements

58, 60 are embodied as truncated cones and/or truncated pyramids.

In another embodiment, for example, the first truncated cone 68 can be arranged with its bottom surface on the carrier element 52. Furthermore, a further second truncated cone 70 may be arranged on the first truncated cone 68. For example, the second truncated cone 70 may be arranged on the first truncated cone 68 such that the bottom surface of the second truncated cone 70 points away from the carrier element 52. In a further embodiment, for example, the first truncated pyramid 68 can be arranged with its base surface on the carrier element 52. Furthermore, a further second truncated pyramid 70 may be arranged on the first truncated pyramid 68. For example, the second truncated pyramid 70 may be arranged on the first truncated pyramid 68 such that the base surface of the second truncated pyramid 70 faces away from the carrier element 52. In an extension, for example, a truncated cone can be combined with a truncated pyramid.

Fig. 9e shows a separating element 26 with compensating

elements

58, 60, the compensating

elements

58, 60 is triangular. In particular, the compensating

elements

58, 60 form a conical and/or pyramidal shape. In other words, the

compensation elements

58, 60 are configured as cones and/or pyramids. In a development, the

compensation elements

58, 60 are embodied as truncated cones and/or truncated pyramids.

In a further advantageous embodiment, the conical and/or pyramidal compensating

elements

58, 60 have different dimensions. For example, the plurality of tapered and/or pyramidal first compensation elements 72 may have a first size, wherein the plurality of tapered and/or pyramidal second compensation elements 74 have a second size, wherein the first size is greater than the second size.

Fig. 10 shows a schematic representation of a carrier element 52 according to an embodiment of the invention in a perspective view. The carrier member 52 includes a first surface 54 and a second surface 56, the first surface 54 may face the first battery cell 42, and the second surface 56 may face the second battery cell 44. The carrier element 52 according to fig. 10 may be implemented according to the carrier element 52 of fig. 3 and/or according to the carrier element 52 of fig. 8 and/or according to the carrier element 52 of fig. 4, 5, 6 and/or 7. In contrast to the carrier element 52 according to fig. 3 and/or 8 and/or 4, 5, 6 and/or 7, the carrier element 52 does not have the

compensation elements

58, 60.

Fig. 11 shows a schematic representation of a separating element 26 according to an embodiment of the invention in a perspective view. The separating element 26 according to fig. 11 can be implemented as the separating element 26 according to fig. 3 and/or as the separating element 26 according to fig. 8 and/or as the separating element 26 according to fig. 4, 5, 6, 7 and/or 9. In contrast to the separating element 26 according to fig. 3 and/or 8 and/or 4, 5, 6, 7 and/or 9, the compensating

elements

58, 60 are arranged differently or in a different pattern on the carrier element 52. The separating element 26 according to fig. 11 is only shown visible from the first surface 54 of the separating element 26, or only the first surface 54 is visible according to fig. 11. However, the arrangement of the compensating

elements

58, 60 on the second surface 56 (not shown here) is configured identically and/or mirrored. In other words, the plurality of first compensation elements 58 and the plurality of second compensation elements may be arranged mirror-symmetrically with respect to one another, wherein for example the carrier element 52 may be configured as a mirror axis, a mirror surface or a plane of symmetry, an axis of symmetry.

Fig. 11 shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is designed in the form of an oval. Furthermore, the first compensation element 58 of oval design is arranged on the carrier element 52 in a wavy manner. In other words, the first compensation element 58 is arranged such that wavy lines, in particular parallel wavy lines, are generated, wherein these wavy lines extend in the direction of the longer edge of the first surface 54. By means of the wavy lines of the first compensating element 58, tempering fluid can be guided and/or deflected, for example. In this advantageous embodiment, the plurality of first compensation elements 58 and/or the plurality of second compensation elements are arranged in a first configuration or a second configuration relative to one another, such that a first flow channel, which is formed jointly by the plurality of first compensation elements, is formed in the first flow space and/or a second flow channel, which is formed jointly by the plurality of second compensation elements, is formed in the second flow space.

Fig. 11b shows a schematic representation of the separating element 26 in a perspective view, wherein the first compensating element 58 has two different sizes. The first compensation element 80 is embodied as elliptical. The third compensating element 82 is embodied as circular, wherein the third circular compensating element 82 has a larger base surface and/or a larger volume than the first elliptical compensating element 80. The third circular compensation element 82 is arranged such that the third circular compensation element 82 forms two lines extending parallel to each other, wherein the lines are arranged perpendicular to the longer sides of the first surface 54 of the carrier element 52 and thus perpendicular to the length of the first surface 54 of the carrier element 52. Furthermore, the third circular compensation elements 82 are arranged in lines such that these lines do not reach the entire length of the carrier element 52. The first elliptical compensation elements 80 are correspondingly evenly arranged on the first surface 54 and distributed on the first surface 54 around the third circular compensation element 82. By means of this arrangement of the first elliptical compensation element 80 and the third circular compensation element 82, for example, the tempering fluid can be guided and/or deflected. For example, the tempering fluid can be deflected by means of a third circular compensation element 82 in the form of an S-curve corresponding to the arrow 84. In other words, the tempering fluid is deflected around the third circular compensation element 82. Tempering of the battery cell may thereby be improved. In this advantageous embodiment, the plurality of first compensation elements 58 and/or the plurality of second compensation elements are arranged in a first configuration or in a second configuration relative to one another, such that a first flow channel, here an S-curve, which is formed jointly by the plurality of first compensation elements is formed in the first flow space and/or a second flow channel, which is formed jointly by the plurality of second compensation elements, is formed in the second flow space.

Fig. 11c shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is embodied in an oval shape. Furthermore, first compensation elements 58 of oval configuration are arranged diagonally in a line on the carrier element 52. In other words, the first compensation element 58 is arranged such that diagonal lines, in particular parallel lines and/or straight lines, are formed, wherein these lines extend in a diagonal direction with respect to the first surface 54 of the carrier element 52 on the first surface 54, wherein the first surface 54 is embodied in particular as a rectangle. Furthermore, the first compensation elements 58 may be arranged in other lines, wherein the other lines are arranged perpendicular to the lines of the first compensation elements 58 and thus likewise in a direction opposite to the other diagonal with respect to the first surface 54 of the carrier element 52.

Fig. 11d shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is designed in an annular and/or circular manner. Furthermore, first compensation elements 58 of annular and/or circular configuration are arranged in an evenly distributed manner on the first surface 54 of the carrier element 52. In other words, the first compensation elements 58 are arranged such that a uniformly distributed pattern is constructed on the first surface 54 of the carrier element 52 by means of a plurality of first compensation elements 58.

Fig. 11e shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is designed in the form of a ring and/or a circle or a sphere. The first compensation element 58, which is of annular and/or circular configuration, is arranged on the first surface 54 of the carrier element 52, such that two regions of the

first compensation element

58, 60 are configured which have different densities. In this advantageous embodiment, the separating element 52 has a first region 86 with a first density of the first compensation elements 58 and a second region with a second density of the first compensation elements 58, wherein the first density has a value greater than the second density. In other words, more compensating elements 58 are arranged in the first region 86 than in the second region 88. In other words, the number of first compensation elements 58 in the first region 86 is higher than the number of first compensation elements 58 in the second region 88. Corresponding bulges or protrusions of the battery cells, which may have different strengths in different regions, may thus be compensated accordingly.

Fig. 11f shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is configured in an annular and/or circular shape. A first compensation element 58 of annular and/or circular configuration is arranged on the first surface 54 of the carrier element 52, such that a vertical line is formed by means of the first compensation element 58. Perpendicular means perpendicular to the longest side of the first surface 54 of the carrier element 52 or perpendicular to the length, so that the line of the first compensation element 58 is parallel to the broad side of the first surface 54 of the carrier element 52. In other words, the first compensation element 58, which is of annular and/or circular configuration, is arranged on the first surface 54 of the carrier element 52 such that a striped pattern is formed. In other words, the compensation elements 58 are arranged such that vertical lines, in particular parallel lines, are formed, wherein these vertical lines extend perpendicular to the longer edges of the first surface 54. For example, each compensation element 58 may be arranged as a line that is continuous perpendicular to the length of the first surface 54 of the carrier element 52. In this advantageous implementation, two rows of first compensation elements 58 are respectively arranged side by side in a line perpendicular to the length of the first surface 54 of the carrier element 52. In particular, no compensation element is arranged in a subsequent region on the first surface 54 of the carrier element 52. Another line of first compensation elements 58 is then arranged at a distance. Thereby creating a fringe pattern of the first compensation element 58.

By means of the vertical lines of the compensating element 58, the tempering fluid can be guided and/or deflected, for example. In this advantageous embodiment, the plurality of first compensation elements 58 and/or the plurality of second compensation elements are arranged in a first configuration or in a second configuration relative to one another, such that a first flow channel, which is formed jointly by the plurality of first compensation elements, is formed in the first flow space and/or a second flow channel, which is formed jointly by the plurality of second compensation elements, is formed in the second flow space.

Fig. 11g shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is configured in an annular and/or circular shape. The separating element 26F according to fig. 11F is constructed according to the separating element 26 of fig. 11 e. In contrast to the separating element 26 according to fig. 11e, the first compensation element 58 of the separating element 26 according to fig. 11f is arranged perpendicularly to the shorter side of the first surface 54 of the carrier element 52 and thus perpendicularly to the width of the first surface 54 of the carrier element 52. In other words, the compensation element according to fig. 11f is arranged parallel to the longest side of the first surface 54 of the carrier element 52 and thus parallel to the length of the first surface 54 of the carrier element 52.

Fig. 11h shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is configured in an annular and/or circular shape. The separating element 26 according to fig. 11h is constructed from the separating element 26 according to fig. 11e and/or the separating element 26 according to fig. 11 f. In contrast to the separating element 26 according to fig. 11e and/or fig. 11f, the first compensating elements 58 of the separating element 26 according to fig. 11h are arranged diagonally in a line on the carrier element 52. In other words, the first compensation element 58 is arranged such that diagonal lines, in particular parallel lines and/or straight lines, are formed, wherein these lines extend on the first surface 54 in a diagonal direction with respect to the rectangular first surface 54 of the carrier element 52. In other words, a stripe pattern can be formed in particular by means of the first compensation element 58, so that, for example, stripes having a width of three first compensation elements 58 are formed diagonally on the first surface 54 of the carrier element 52.

Fig. 11i shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is configured in the form of a ring and/or a circle, and wherein the first compensating element has two different sizes. The first compensation element 80 has a first dimension and the third compensation element 82 has a second dimension, wherein the first dimension is smaller than the second dimension. In other words, the diameter of the first compensation element 80 is smaller than the diameter of the third compensation element 82. The first compensation element 80 and the third compensation element 82 are alternately arranged on the first surface 54 of the carrier element 52 at a uniform distance and/or in a uniform pattern. In other words, the first compensation element 80 and the third compensation element are arranged alternately in succession, in particular in a straight line.

Furthermore, the carrier element 52 has at least one opening 66 extending through the carrier element, so that the tempering fluid can flow through the carrier element 52 between the first flow space and the second flow space. In this advantageous embodiment, the carrier element 52 has a plurality of openings 66 extending through the carrier element 52, wherein these openings 66 have different sizes and/or are arranged in an undefined pattern on the first surface 54 of the carrier element 52. In other words, the carrier member 52 has a plurality of openings 66 extending through the carrier member 52, the openings 66 being of different sizes and/or being arranged in an undefined pattern.

Fig. 11j shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is configured in an annular and/or circular shape. Furthermore, first compensation elements 58 of annular and/or circular configuration are arranged in an evenly distributed manner on the first surface 54 of the carrier element 52. In other words, the first compensation elements 58 are arranged such that a uniformly distributed pattern is constructed on the first surface 54 of the carrier element 52 by means of a plurality of first compensation elements 58.

Furthermore, the carrier element 52 has at least one opening 66 extending through the carrier element, so that the tempering fluid can flow through the carrier element 52 between the first flow space and the second flow space. In this advantageous embodiment, the carrier element 52 has a plurality of openings 66 of rectangular configuration, which extend through the carrier element 52, wherein the openings 66 are arranged in a defined pattern on the first surface 54 of the carrier element 52. In other words, the carrier element 52 has a plurality of openings 66 extending through the carrier element 52, wherein the openings 66 are arranged in a uniformly distributed pattern on the first surface 54. In other words, the openings 66 are arranged such that they are arranged in lines on the first surface 54, wherein a plurality of lines are arranged in parallel.

Fig. 11k shows a schematic illustration of the separating element 26 in a perspective view, wherein the first compensating element 58 is designed in an elliptical manner. Furthermore, the elliptically configured first compensation elements 58 are arranged uniformly distributed on the first surface 54 of the carrier element 52. In other words, the first compensation elements 58 are arranged such that a uniformly distributed pattern is constructed on the first surface 54 of the carrier element 52 by means of a plurality of first compensation elements 58. For example, elliptical first compensation elements 58 may be arranged at a first angle to each other. The further compensating element 58 can be arranged, in particular, at a second angle, wherein the second angle is configured to be rotated by 90 ° relative to the first angle.

Furthermore, the carrier element 52 has at least one opening 66 extending through the carrier element, so that the tempering fluid can flow through the carrier element 52 between the first flow space and the second flow space. In this advantageous embodiment, the carrier element 52 has a plurality of openings 66 extending through the carrier element 52, wherein these openings 66 are arranged in a defined pattern, in particular in a uniformly distributed pattern, on the first surface 54 of the carrier element 52. In this embodiment, the opening 66 has, in particular, the shape of an arrow point. For example, the openings 66 may be arranged such that the tips of the arrow-shaped openings 66 point in a first direction. Further, the other openings 66 may be arranged such that the arrow tips of the arrow-shaped openings 66 point in a second, opposite direction.

Claims

1. A battery module (20) comprises a plurality of battery cells (24, 42, 44), in particular lithium ion battery cells (24, 42, 44), wherein

The battery module (20) has a separating element (26) arranged between a first battery cell (42) and a second battery cell (44), which separating element comprises a carrier element (52) having a first surface (54) facing the first battery cell (42) and a second surface (56) facing the second battery cell (44), wherein

The first surface (54) includes a plurality of first compensation elements (58) configured to be elastically deformable and respectively arranged in contact with the first battery cells (42), and

the second surface (56) comprises a plurality of second compensation elements (60) which are configured to be elastically deformable and are each arranged in contact with the second battery cells (44), wherein, furthermore, the second surface comprises

A first flow space is formed between the separating element (26) and the first battery cell (42) for the tempered fluid to flow through, and

a second flow space is formed between the separating element (26) and the second battery cell (44) for the tempering fluid to flow through.

2. The battery module (20) of claim 1,

it is characterized in that the preparation method is characterized in that,

the carrier element (52) is constructed from a metallic material or from a polymeric material.

3. The battery module (20) according to any one of the preceding claims 1 to 2,

it is characterized in that the preparation method is characterized in that,

the first and/or second plurality of compensating elements (58, 60) are each constructed from an elastomeric material.

4. The battery module (20) according to any one of the preceding claims 1 to 3,

it is characterized in that the preparation method is characterized in that,

the first plurality of compensation elements (58) and/or the second plurality of compensation elements (60) are each connected to the carrier element (52) in a form-fitting, material-fitting or force-fitting manner.

5. The battery module (20) according to any one of the preceding claims 1 to 4,

it is characterized in that the preparation method is characterized in that,

the plurality of battery cells (24, 42, 44) are each designed as prismatic battery cells (47).

6. The battery module (20) according to any one of the preceding claims 1 to 5,

it is characterized in that the preparation method is characterized in that,

the first and/or second compensating elements (58, 60) each have a cross section which is arranged perpendicular to the shortest distance between the first and second battery cells (42, 44), wherein

The cross-section has the shape of a circle, ellipse, triangle, rectangle, or square.

7. The battery module (20) according to any one of the preceding claims 1 to 6,

it is characterized in that the preparation method is characterized in that,

the first plurality of compensation elements (58) and/or the second plurality of compensation elements (60) form a spherical, a cuboid, a conical, a cubic, an elliptical shape, respectively.

8. The battery module (20) according to any one of the preceding claims 1 to 7,

it is characterized in that the preparation method is characterized in that,

the first and second plurality of compensation elements (58, 60) are arranged mirror-symmetrically to each other.

9. The battery module (20) according to any one of the preceding claims 1 to 8,

it is characterized in that the preparation method is characterized in that,

the first and/or second plurality of compensating elements (58, 60) are each designed to increase the turbulence and/or to deflect the tempering fluid flowing through the first or second flow space, such that a heat transfer is formed between the tempering fluid and the first or second battery cell (42, 44).

10. The battery module (20) according to any one of the preceding claims 1 to 9,

it is characterized in that the preparation method is characterized in that,

the separating element (26) has a first region (86) with a first density of the first or second compensating element (58, 60) and a second region (88) with a second density of the first or second compensating element (58, 60), wherein

The first density has a higher value than the second density.

11. The battery module (20) according to any one of the preceding claims 1 to 10,

it is characterized in that the preparation method is characterized in that,

the first and/or second compensating elements (58, 60) are arranged relative to one another in a first or second configuration such that

A first flow channel formed jointly by the first compensation elements (58) is formed in the first flow space, and/or

A second flow channel, which is formed jointly by the second compensation elements (60), is formed in the second flow space.

12. The battery module (20) according to any one of the preceding claims 1 to 11,

it is characterized in that the preparation method is characterized in that,

the carrier element (52) further having at least one opening (66) extending through the carrier element (52),

such that the tempering fluid can flow through the carrier element (52) between the first flow space and the second flow space.

13. Use of the battery module (20) according to any one of claims 1 to 12,

wherein a tempering fluid flows through the first and second flow spaces such that a direct contact is configured between the tempering fluid and the first battery cell (42) and the second battery cell (44) and the plurality of battery cells (24, 42, 44) have a temperature below 40 ℃, in particular between 5 ℃ and 35 ℃.

14. Use of the battery module (20) according to the preceding claim 13,

it is characterized in that the preparation method is characterized in that,

the plurality of first compensation elements (58) and the plurality of second compensation elements (60) elastically absorb volumetric deformation of the first battery cell (42) and the second battery cell (44).

15. The separating element (26) of a battery module (20) according to one of claims 1 to 12, comprising a carrier element (52) having a first surface (54) and a second surface (56), wherein

the second surface (56) includes a plurality of second compensation elements (60) configured to be elastically deformable and respectively disposed in contact with the second battery cells (44).