DE102019113603A1 - COOLING PLATE FOR A BATTERY FOR A MOTOR VEHICLE AND BATTERY FOR A MOTOR VEHICLE WITH A COOLING PLATE - Google Patents

Abstract

The invention relates to a cooling plate (14) for a battery (10) of a motor vehicle, comprising a hollow profile (20) through which a cooling medium can flow, the height of which can be increased in relation to an initial shape by applying an internal pressure and reduced by applying an external pressure; wherein the hollow profile (20) has at least one expansion web (34) connecting an upper hollow profile inside (36) and a lower hollow profile inside (38), the expansion web (34) having a cross-section which defines the upper hollow profile inside (36) and the lower hollow profile inside ( 38) does not connect to one another in the shortest possible way when the hollow profile (20) has its original shape and is stretched when the height of the hollow profile (20) is increased and is compressed when the height of the hollow profile (20) is reduced. The invention also relates to a battery (10) for a motor vehicle with such a cooling plate (14).

Description

Technical area

The present invention relates to a cooling plate for a battery of a motor vehicle and a battery for a motor vehicle having such a cooling plate.

State of the art

It is known per se to provide cooling plates for cooling batteries through which a cooling medium can flow. For example, cooling plates of this type are arranged between individual battery modules so that excess heat generated in particular in the respective battery cells of the battery modules can be dissipated.

Such cooling plates and battery modules usually only have flat surfaces within certain limits. In fact, hard surfaces are never completely flat without a lot of reworking, but instead have bumps, dents, notches and the like. In order to be able to transfer heat effectively, it is advantageous to realize the largest possible contact without air inclusions between such cooling plates and battery modules.

If a battery module is placed or positioned on a cooling plate, in practice there is usually no complete flat contact, but rather point-like or linear contacts. There is usually always a certain gap between the cooling plates and the battery modules. Due to tolerances, there can be relatively large component, shape and / or position tolerances between the cooling plates and the battery modules. It may well happen that gaps of up to 0.7 mm or more have to be bridged.

In order to enable the best possible thermal connection between cooling plates and battery modules, it is common to use so-called gap filler material. This is a heat-conducting material that can fill gaps or air pockets between cooling plates and battery modules. Such gap filler material does not conduct heat optimally, but it does so much better than air. The thinner such a gap filler material can be applied, the better the thermal connection between the cooling plate and the battery module. In addition, it is desirable to use as little as possible of this very expensive gap filler material in order to save costs.

Description of the invention

It is therefore the object of the invention to provide a solution by means of which a particularly good thermal connection between a cooling plate and at least one battery module of a battery can be made possible in a particularly simple and reliable manner.

This object is achieved by a cooling plate for a battery of a motor vehicle and by a battery with such a cooling plate having the features of the independent claims. Further possible configurations of the invention are given in particular in the subclaims.

The cooling plate according to the invention for a battery of a motor vehicle comprises a hollow profile through which a cooling medium can flow, the height of which can be increased in relation to an initial shape by applying an internal pressure and reduced by applying an external pressure. Deformation of the hollow profile can take place elastically or also plastically due to the material and / or temperature properties of the hollow profile or due to additional structural elements of the hollow profile. The hollow profile can in particular be a thin-walled hollow profile, for example with a wall thickness of approx. 0.4 mm. The thin-walled hollow profile can be made from aluminum, for example, and the hollow profile can be an extruded profile, for example. A mixture of water and glycol, for example, can be used as a cooling medium, which can flow through the hollow profile and thus absorb and transport away excess heat from battery cells and battery modules.

The hollow profile has at least one expansion web connecting an upper hollow profile inside and a lower hollow profile inside. The expansion bar has a cross-section which does not connect the upper hollow profile inside and the lower hollow profile inside by the shortest route when the hollow profile has its original shape, the cross section of the expansion bar being stretched when the height of the hollow profile is increased and compressed when the height of the hollow profile is reduced . The cross-section of the expansion bar does not extend straight up in the vertical direction of the hollow profile or the cooling plate from bottom to top in order to connect the two inner sides of the hollow profile. The starting shape of the hollow profile is to be understood in particular as that shape which the hollow profile has after manufacture. The initial shape of the hollow profile is also to be understood in particular as that shape or shape of the hollow profile when no pressure is exerted on the hollow profile from either the inside or the outside.

Because the cross section of the expansion bar does not connect the upper hollow profile inside and the lower hollow profile inside by the shortest path, the hollow profile can be deformed particularly easily in order to increase or decrease its height relative to its original shape. Said internal pressure for increasing the height of the hollow profile can be applied, for example, by means of the cooling medium by introducing it into the hollow profile with an increased pressure. As a result, the hollow profile can be expanded by a type of internal high-pressure forming process, as a result of which the height of the hollow profile can be changed. It is also possible to exert pressure on the hollow profile from the outside, for example from an upper side and from a lower side, as a result of which the height of the hollow profile can be reduced.

Both when increasing and reducing the height of the hollow profile, the at least one expansion web contributes to the fact that the hollow profile is reliably supported on the inside and, on the other hand, can still be deformed relatively easily. When the height of the hollow profile is increased, the expansion web, which in the initial shape has in particular a compressed shape, is stretched in particular in the vertical direction of the hollow profile. The shape of the cross section of the expansion bar changes. If, on the other hand, the height of the hollow profile is reduced, the cross section of the expansion web is compressed, in particular viewed in the vertical direction of the hollow profile.

By providing the at least one expansion web, it is therefore possible, in particular, to change the height of the hollow profile by applying force or applying pressure from inside and outside. It is thus possible, in particular, to adapt the height of the hollow profile to an installation situation or tolerance situation within a battery of a motor vehicle.

For example, if component, shape and / or positional tolerances on the hollow profile and / or an associated battery module lead to a relatively large gap between the hollow profile and the battery module, the hollow profile can be inflated from the inside, so to speak, by the height of the To enlarge the hollow profile. As a result, a gap between the hollow profile and a battery module side can be significantly reduced. In the same way, the reverse procedure can also be used if the situation should actually require that the height of the hollow profile should be too great. In that case, the hollow profile is simply compressed in the vertical direction. For example, in the case of the cooling plate according to the invention, it is possible to expand the height of the hollow profile by 0.4 mm by applying an internal pressure of 1 bar. If, without the measure, a gap between the hollow profile and a battery module side would be 0.7 mm high, for example, this is only 0.3 mm high after the hollow profile has been expanded. Correspondingly less gap filler material has to be used. On the one hand, this saves costs and, on the other hand, the thermal connection between the hollow profile of the cooling plate and a corresponding battery module side can be improved.

A possible embodiment of the invention provides that an upper connection area, on which the expansion bar is connected to the upper hollow profile inside, and a lower connection area, at which the expansion bar is connected to the lower hollow profile inside, are arranged opposite one another. Since these connection areas or connection points are arranged in the same position in relation to a transverse direction of the hollow profile, when expanding the hollow profile and also when compressing the hollow profile, it can be prevented that an upper side and a lower side of the hollow profile slide relative to one another in relation to the transverse direction of the hollow profile. shift towards each other.

Another possible embodiment of the invention provides that the cross section of the expansion web has at least one at least substantially S-shaped section. For example, the cross section can run in a zigzag shape from the upper hollow profile inside to the lower hollow profile inside. This zigzag shape has at least a simple s-shape. Within a plane spanned by the vertical and transverse directions, e.g. two sections of the cross-section run diagonally with an intermediate section e.g. can run in the transverse direction. If the hollow profile is widened, the diagonal sections stand up more steeply and thus enable a controlled widening of the hollow profile. It is also possible that the cross section of the expansion web has several S-shaped sections which follow one another. In other words, the cross-section of the expansion web can thus have a plurality of sections which are lined up in a zigzag shape. This shaping of the cross section in particular promotes the expansion of the hollow profile in the vertical direction. At the same time, this shape of the cross section ensures a good support effect for the hollow profile inside.

According to a further possible embodiment of the invention, it is provided that the expansion web extends parallel to the longitudinal direction of the cooling plate, in particular over the entire length of the hollow profile. As a result, the hollow profile can be divided into two chambers if only a single expansion web is provided.

In a further possible embodiment of the invention, it is provided that the cooling plate has several of the expansion webs, which are arranged parallel to one another. In this way, a particularly uniform expansion and compression of the hollow profile in the vertical direction can be ensured. In addition, the large number of expansion bars ensures that the hollow profile is supported relatively stable on the inside. In addition, the expansion bars ensure that the heat given off by a battery module does not only heat the cooling plate, in particular the hollow profile, on the outside. Heat can be conducted into the interior of the hollow profile via the expansion webs, through which the cooling medium can flow.

Another possible embodiment of the invention provides that the hollow profile has at least one separating web, which is arranged on one of the hollow profile insides and is spaced apart from the other hollow profile inner. In relation to the vertical direction of the hollow profile, this separating web is therefore not continuous. The separating web ensures in particular that the hollow profile is not only heated in the outer regions, but that heat is also transferred into the interior of the hollow profile when the hollow profile is arranged on a battery module. This allows particularly good heat transfer from the battery module in question via the hollow profile to the cooling medium which flows through the hollow profile. Because the at least one separating web does not connect the inner sides of the hollow profile to one another, the separating web does not prevent the hollow profile from expanding or compressing in the vertical direction.

According to a further possible embodiment of the invention, it is provided that a cross section of the separating web runs parallel to the vertical direction of the cooling plate. In other words, the separating web runs straight in relation to the vertical direction of the cooling plate or the hollow profile. However, other shapes are also possible, for example also a zigzag shape or the like, as long as the separating web does not connect the inner sides of the hollow profile to one another. A non-straight shape of the cross-section can in particular contribute to increasing the surface area of the separating web, which can have a positive effect on the thermodynamic properties of the hollow profile.

Another possible embodiment of the invention provides that the separating web extends parallel to the longitudinal direction of the cooling plate, in particular over the entire length of the hollow profile. As a result, heat can be introduced from the battery in a particularly uniform manner to the cooling medium, which flows through the hollow profile, through the intermediary of the separating web.

In a further possible embodiment of the invention, it is provided that, with respect to the transverse direction of the cooling plate, several of the separating webs are arranged between two of the expansion webs. The expansion webs thus subdivide the hollow profile into chambers which are separate from one another, several of the separating webs being arranged within these chambers. As a result, the cooling medium flowing through the respective chambers can absorb heat from the associated battery module in a particularly homogeneous manner.

Another possible embodiment of the invention provides that the separating webs are arranged alternately on the upper hollow profile inside and the lower hollow profile inside. In particular, if respective battery modules are arranged on the top and bottom of the hollow profile, this contributes to the fact that heat can be transferred to the cooling medium within the hollow profile particularly evenly from both the upper and the lower battery module.

A further possible embodiment of the invention provides that opposite longitudinal sides of the hollow profile each do not connect a hollow profile side and a hollow profile underside to one another by the shortest path when the hollow profile has its original shape. For example, the longitudinal sides of the hollow profile can have an arcuate cross-section or at least one at least essentially S-shaped section. In other words, the respective cross-sections of the longitudinal sides of the hollow profile can be designed in an arc-shaped or, for example, an S-shape. For example, it is possible for the longitudinal sides of the hollow profile to have the same shape as the expansion webs in relation to their cross section. This can promote the expansion and compression of the hollow profile in the vertical direction.

According to a further possible embodiment of the invention, it is provided that respective open end faces of the hollow profile are closed by respective end sections of the cooling plate, at least one of the end sections having a connection for supplying and / or discharging the coolant.The end sections can, depending on how the connections are arranged for the supply and discharge of the coolant, also serve to accomplish a coolant deflection from one chamber of the hollow profile to the other chamber of the hollow profile.

The battery according to the invention for a motor vehicle comprises at least one cooling plate according to the invention or at least one possible embodiment of the cooling plate according to the invention, this being arranged on a battery module side of a battery module of the battery. For example it is also possible to arrange one of the cooling plates between a pair of battery modules. In particular, due to the possibility of widening the cooling plate in the vertical direction, it is possible to reduce gaps between the cooling plate and the respective battery module sides.

Finally, one possible embodiment of the battery provides that a mat made of a thermally conductive material is arranged on a side of the hollow profile of the cooling plate assigned to the battery module side. In other words, it is possible to glue or otherwise arrange a type of gap filler mat on the side of the hollow profile which is assigned to the battery module side. The handling of such gap filler mats is much easier and you don't need a dosing system to apply the gap filler.

Further possible advantages, features and details of the invention emerge from the following description of possible exemplary embodiments and with reference to the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations shown below in the description of the figures and / or in the figures alone can be used not only in the respectively specified combination, but also in other combinations or alone, without the scope of the invention to leave.

Figure list

• 1 eine Perspektivansicht einer Batterie für ein Kraftfahrzeug mit mehreren Batteriemodulen, wobei zwischen den Batteriemodulen Kühlplatten angeordnet sind;
• 2 eine Draufsicht auf die Batterie;
• 3 eine Querschnittansicht der Batterie entlang der in 2 gekennzeichneten Schnittebene A-A;
• 4 eine Perspektivansicht einer ersten Ausführungsform der Kühlplatte;
• 5 eine Perspektivansicht einer zweiten Ausführungsform der Kühlplatte;
• 6 eine Perspektivansicht einer dritten Ausführungsform der Kühlplatte;
• 7 eine Perspektivansicht einer ersten Ausführungsform eines Endabschnitts für die Kühlplatten;
• 8 eine Perspektivansicht einer zweiten Ausführungsform eines Endabschnitts für die Kühlplatten;
• 9 eine Perspektivansicht einer weiteren Ausführungsform eines Endabschnitts der Kühlplatte;
• 10 eine Perspektivansicht eines Hohlprofils der Kühlplatte, welches mittels eines Kühlmediums durchströmbar ist;
• 11 eine perspektivische Detailansicht des Hohlprofils;
• 12 eine Frontalansicht des Hohlprofils.

The drawing shows in:

• 1 a perspective view of a battery for a motor vehicle with a plurality of battery modules, wherein cooling plates are arranged between the battery modules;
• 2 a plan view of the battery;
• 3 a cross-sectional view of the battery along the line in FIG 2 marked cutting plane AA;
• 4th a perspective view of a first embodiment of the cooling plate;
• 5 a perspective view of a second embodiment of the cooling plate;
• 6th a perspective view of a third embodiment of the cooling plate;
• 7th a perspective view of a first embodiment of an end portion for the cooling plates;
• 8th a perspective view of a second embodiment of an end portion for the cooling plates;
• 9 a perspective view of a further embodiment of an end portion of the cooling plate;
• 10 a perspective view of a hollow profile of the cooling plate, through which a cooling medium can flow;
• 11 a perspective detailed view of the hollow profile;
• 12 a front view of the hollow profile.

Identical or functionally identical elements have been provided with the same reference symbols in the figures.

One battery 10 for a motor vehicle is in a perspective view in 1 shown. The battery 10 includes several battery modules 12 which are arranged one above the other according to the present illustration. Between the top two battery modules 12 and between the lower two battery modules 12 is a cooling plate each 14th arranged, through which a cooling medium can flow, in order to remove excess heat, in particular from battery cells, not shown here, of the battery modules 12 discharge. When the ambient temperature is cold, the cooling plates 14th can also be used, for example, for the battery modules 12 , especially the battery cells contained therein, to be heated to a favorable operating temperature. About an inlet 16 can use the cooling plates 14th are supplied with the cooling medium. About a process 18th the heated coolant can be discharged.

In 2 is the battery 10 shown in a top view. This view is used in particular to identify a section plane AA.

In 3 is the battery 10 in a cross-sectional view along the in 2 shown cutting plane AA. Here you can see again how the cooling plates 14th between the respective battery modules 12 are arranged. To ensure particularly good heat transfer from the battery modules 12 on that in the cold plates 14th To ensure existing cooling medium, it is desirable to use the battery modules 12 as flat as possible on the cooling plates 14th to be connected, especially without air pockets being present. Usually, so-called gap filler materials are used for this, since usually neither the battery modules are due to production 12 nor the cooling plates 14th are designed quite flat on their surfaces. For example, the surfaces of the battery modules 12 and the cooling plates 14th Have bumps, dents, notches, etc. Depending on the component, shape and position tolerance, this can result in gaps.

In 4th is a possible embodiment of the cooling plate 14th shown in a perspective view. This embodiment of the cooling plate 14th is between the top two battery modules 12 (please refer 1 and 3 ) arranged. The cooling plate 14th comprises a hollow profile 20th , which can be a thin-walled hollow profile with a wall thickness of, for example, approximately 0.4 mm. The entire hollow profile 20th can for example be produced by extrusion. At open ends of the hollow profile that are not each recognizable here 20th are end sections 22nd , 24 arranged which the hollow profile 20th close liquid-tight. The front end section according to the present illustration 22nd has multiple connections 26th for supplying and discharging as well as for passing coolant through.

For example, it is possible that through the top right connector 26th Coolant in the hollow profile 20th is introduced. The hollow profile can for example have a left and a right chamber. So the coolant is first fed to the right chamber and flows to the end section 24 , which has a coolant deflection that cannot be seen here. The coolant then reaches the left-hand chamber of the hollow profile via this coolant deflection 20th and then flows to the connection 26th , through which the now heated coolant the hollow profile 20th can leave. The lower two connections 26th serve to the lower cooling plate 14th (please refer 1 and 3 ) also to be supplied with coolant or to discharge the coolant again.

In 5 is a further embodiment of the cooling plate 14th shown in a perspective view. This embodiment is with the battery 10 between the lower two battery modules 12 (please refer 1 and 3 ) installed. This cold plate 14th thus serves as a type of end piece, which can also be seen from the fact that a front end section according to the present illustration 28 only two of the connections 26th having. One of the connections 26th in turn serves to supply coolant, the other of the connections 26th serves to discharge coolant.

In 6th is another possible embodiment of the cooling plate 14th shown. As you can see here, both end sections have 28 respective connections 26th on. The connections arranged on the left according to the present illustration 26th can serve, for example, to supply coolant, with the right connections 26th can serve to allow the coolant to drain. It is also possible to use the cooling plate 14th to operate in countercurrent operation.

In 7th is the end section 22nd the cooling plate 14th shown in a perspective view. In the present case you can use a partition 30th within the end section 22nd detect. This enables separate supply and removal of the coolant.

In 8th is the end section 28 shown in a perspective view, this also being a partition 30th having.

In 9 is the end section 24 with said coolant deflection shown in a perspective view. This end section 24 is used by those in the 4th and 5 shown embodiments of the cooling plate 14th So for example, coolant from one to another chamber of the hollow profile 20th redirect.

In 10 is the hollow profile 20th shown alone in a perspective view. In the embodiment of the hollow profile shown here 20th this has four separate chambers 32 on, which are separated from each other and extend in the longitudinal direction x of the hollow profile 20th or the cooling plate 14th extend.

In 11 is the hollow profile 20th shown in a perspective detailed view. Here, above all, is the chamber on the far right 32 and another part of the chamber next to it 32 to recognize. The two chambers 32 are made by an expansion bar 34 of the hollow profile 20th separated from each other. The expansion bar 34 connects an upper hollow profile inside 36 with a lower hollow profile inside 38 and is an integral part of the hollow profile 20th , can therefore also be produced by extrusion, for example.

The hollow profile through which the cooling medium can flow 20th can be achieved by applying internal pressure, particularly in the vertical direction z be expanded. It is also possible to adjust the height of the hollow profile by applying external pressure from above and below 20th to zoom out. This expansion and compression of the hollow profile 20th is determined by the cross-sectional shape of the expansion bars 34 favored. As can be seen, the expansion bar that can be seen here has 34 a cross section, which the upper hollow profile inside 36 and the lower hollow profile inside 38 not connecting by the shortest route. In other words, the expansion web runs 34 so not exactly in a vertical direction z , but s-shaped or zigzag. In the present case, the expansion bar 34 two unspecified diagonal struts and one in the transverse direction y running strut. When expanding or increasing the height of the hollow profile 20th becomes the cross section of the expansion bar 34 stretched, whereas when upsetting the hollow profile 20th based on its vertical direction z the cross section of the expansion bar 34 is also compressed. Both when expanding and compressing the hollow profile 20th the expansion bar ensures 34 on the one hand that the hollow profile 20th reliable on the inside is supported. On the other hand, the cross-sectional shape of the expansion bar is beneficial 34 expanding and compressing the hollow profile 20th . The remaining expansion bars that cannot be seen here 34 have the same shape as the expansion bar that can be seen here 34 on.

As can be seen, there is an upper, unspecified connection area on which the expansion web is located 34 with the upper hollow profile inside 36 is connected, and an unspecified lower connection area on which the expansion web 34 with the lower hollow profile inside 38 is connected, based on the transverse direction y opposite from each other. Both when expanding and compressing the hollow profile 20th this contributes to the fact that the top and bottom of the hollow profile, which are not designated in any more detail here 20th not in the transverse direction y slide towards one another or shift towards one another. The expansion bar 34 also extends parallel to the longitudinal direction x the cooling plate 14th over the entire length of the hollow profile 20th , as a result of which the respective chambers 32 be separated from each other.

As with 10 can already be seen, the cooling plate 14th or the hollow profile 20th several of the expansion bars 34 which are arranged parallel to each other. The hollow profile 20th also has several dividers 40 each on one of the hollow profile insides 36 , 38 are arranged and from the other hollow profile inside 36 , 38 are spaced. Respective cross-sections of the dividers 40 run straight or parallel to the vertical direction z the cooling plate 14th or the hollow profile 20th . The dividers 40 serve in particular to ensure good heat transfer from the battery modules 12 to ensure the cooling medium, which the individual chambers 32 of the hollow profile 20th flows through. Because the dividers 40 inside the hollow profile 20th protrude, the hollow profile 20th not only heated on the outside but also on the inside when heat from the battery modules 12 over the hollow profile 20th is transferred to the cooling medium.

As you can see, the dividers are 40 alternating on the upper hollow profile inside 36 and the lower inside of the hollow profile 38 arranged. Both when expanding and compressing the hollow profile 20th obstruct the dividers 40 the deformation of the hollow profile 20th Not. Because, as already mentioned, the dividers connect 40 the hollow profile insides 36 , 38 not with each other. This facilitates both the expansion and compression of the hollow profile 20th especially in vertical direction z .

In 12 is the hollow profile 20th shown in a front view. In the present case you can again see the cross-sectional shapes of the expansion bars 34 and the dividers 40 detect. In relation to the transverse direction y are several of the dividers 40 between two of the expansion bars 34 arranged. Respective opposite long sides 42 of the hollow profile 20th each connect a hollow profile top 44 and a hollow profile underside 46 not by the shortest route, since according to the present illustration they are arcuate with respect to their cross-section. Other cross-sectional shapes are also possible, so that the opposite long sides 42 for example the same cross-sectional shape as the expansion bars 34 can have. By having the opposite long sides 42 not straight up z run, favors the shape of the long sides 42 also expanding and compressing the hollow profile 20th especially in vertical direction z .

Through the design of the hollow profile described 20th it is therefore possible to change its shape, in particular its thickness in the vertical direction z , relatively easy to change by applying either an internal pressure or an external pressure. Respective gap between the top of the hollow profile 44 or hollow profile underside 46 and outsides of the battery modules 12 can be reduced above all. As a result, the gap filler material to be used can be reduced to a considerable extent. In addition, it is also possible, for example, on the upper side of the hollow profile 44 and / or the underside of the hollow profile 46 to arrange a gap filler mat, not shown here. In the case of gap filler mats of this type, the handling is relatively simple in contrast to when the gap filler is applied, for example, in the form of a caterpillar or the like by means of a metering system.

List of reference symbols

10

battery

12

Battery modules

14th

Cooling plates

16

Intake

18th

procedure

20th

Hollow profile of the cooling plate

22nd

End section of the cooling plate

24

End section of the cooling plate with coolant deflection

26th

Connections of the end sections

28

End section of the cooling plate

30th

Partition wall in the end sections

32

Chambers in the hollow profile

34

Expansion bars of the hollow profile

36

upper hollow profile inside

38

lower hollow profile inside

40

Separators of the hollow profile

42

Long sides of the hollow profile

44

Hollow profile top

46

Hollow profile underside

x

Longitudinal direction

y

Transverse direction

z

Vertical direction

Claims (15)

Cooling plate (14) for a battery (10) of a motor vehicle, comprising - A hollow profile (20) through which a cooling medium can flow, the height of which, in relation to an initial shape, can be increased by applying an internal pressure and reduced by applying an external pressure; - the hollow profile (20) having at least one expansion web (34) connecting an upper hollow profile inside (36) and a lower hollow profile inside (38), - The expansion web (34) has a cross section which does not connect the upper hollow profile inside (36) and the lower hollow profile inside (38) to one another by the shortest path when the hollow profile (20) has its original shape, and when the height of the hollow profile is increased ( 20) is stretched and when reducing the height of the hollow profile (20) is compressed. Cooling plate (14) Claim 1 , characterized in that an upper connection area, on which the expansion web (34) is connected to the upper hollow profile inside (36), and a lower connection area, at which the expansion web (34) is connected to the lower hollow profile inside (38), opposite one another are arranged. Cooling plate (14) Claim 1 or 2 , characterized in that the cross section of the expansion web (34) has at least one at least substantially S-shaped section. Cooling plate (14) according to one of the preceding claims, characterized in that the expansion web (34) extends parallel to the longitudinal direction (x) of the cooling plate (14), in particular over the entire length of the hollow profile (20). Cooling plate (14) according to one of the preceding claims, characterized in that the cooling plate (14) has several of the expansion webs (34) which are arranged parallel to one another. Cooling plate (14) according to one of the preceding claims, characterized in that the hollow profile (20) has at least one separating web (40) which is arranged on one of the hollow profile inner sides (36, 38) and is spaced from the other hollow profile inner side (36, 38) . Cooling plate (14) Claim 6 , characterized in that a cross section of the separating web (40) runs parallel to the vertical direction (z) of the cooling plate (14). Cooling plate (14) Claim 6 or 7th , characterized in that the separating web (40) extends parallel to the longitudinal direction (x) of the cooling plate (14), in particular over the entire length of the hollow profile (20). Cooling plate (14) after one of the Claims 6 to 8th , in their reference to Claim 5 , characterized in that, based on the transverse direction of the cooling plate (14), a plurality of the separating webs (40) are arranged between two of the expansion webs (34). Cooling plate (14) Claim 9 , characterized in that the separating webs (40) are arranged alternately on the upper hollow profile inside (36) and the lower hollow profile inside (38). Cooling plate (14) according to one of the preceding claims, characterized in that opposite longitudinal sides (42) of the hollow profile (20) each do not connect a hollow profile upper side (44) and hollow profile lower side (46) to one another by the shortest route when the hollow profile (20) is in its original shape having. Cooling plate (14) Claim 11 , characterized in that the longitudinal sides (42) of the hollow profile (20) have an arcuate cross-section or at least one at least substantially S-shaped section. Cooling plate (14) according to one of the preceding claims, characterized in that the respective open end faces of the hollow profile (20) are closed by respective end sections (22, 24, 28) of the cooling plate (14), at least one of the end sections (22, 24, 28) has a connection (26) for supplying and / or removing the coolant. Battery (10) for a motor vehicle with at least one cooling plate (14) according to one of the preceding claims, which is arranged on a battery module side of a battery module (12) of the battery (10). Battery (10) Claim 14 , characterized in that on one of the battery module side associated side of the hollow profile (20) the Cooling plate (14) a mat made of a thermally conductive material is arranged.

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