DE102018203920A1 - Spare wheel well for a motor vehicle and method for producing a spare wheel well - Google Patents

Abstract

The invention relates to a spare wheel well (1) for a motor vehicle, comprising at least one cooling device (7) for cooling an electrical energy store (5) arranged or disposable in a recess (2) of the spare wheel well (1). It is provided that in a plastic part (9) of the spare wheel well (1) at least one open-edged recess (10) is formed, wherein the plastic part (9) for forming a closed-circuit cooling channel (8) through the recess (10) on a Element (11) of the spare wheel well (1) is applied. The invention further relates to a method for producing a spare wheel well (1) for a motor vehicle.

Description

The invention relates to a spare wheel well for a motor vehicle, comprising at least one cooling device for cooling an electrical energy accumulator which is arranged or can be arranged in a hollow recess of the spare wheel well. The invention further relates to a method for producing such a spare wheel well.

From the prior art, for example, the publication DE 10 2009 032 768 A1 known. This relates to a motor vehicle with an electric drive, comprising a drive motor and at least a first and a second battery group for powering the drive motor, wherein the at least two battery groups each comprise at least one battery, wherein the first battery group and the second battery group are arranged spatially separated. It is provided that at least the first and the second battery group or heat sink of the first and the second battery group are connected via at least one first channel.

It is an object of the invention to propose a spare wheel well for a motor vehicle, which has advantages over known spare wheel wells, in particular an efficient cooling of the arranged in the Muldenausnehmung or arranged energy storage with high reliability converts.

This is inventively achieved with a spare wheel well for a motor vehicle having the features of claim 1. It is provided that in a plastic part of the spare wheel recess at least one open-edged recess is formed, wherein the plastic part for forming a closed-circuit cooling channel through the recess on an element of the spare wheel well, in particular on a standing in heat transfer connection with the energy storage element of the spare wheel well ,

The spare wheel well can be arranged and fastened on or in the motor vehicle, for example, the spare wheel well is inserted into a recess provided thereon of the body of the motor vehicle during assembly of the motor vehicle. The spare wheel well limits the Muldenausnehmung that exists as a depression in the spare wheel well. For example, the spare wheel well on a bottom and a side wall, which define the Muldenausnehmung together. The side wall starts from the bottom and extends in the direction away from the ground. The side wall surrounds the recess recess at least one direction, in particular in the circumferential direction, preferably completely, is thus formed as a continuous wall.

The spare wheel well is usually arranged in a rear of the motor vehicle, for example - seen in the forward direction of the motor vehicle - behind a rear wheel axle of the motor vehicle. In any case, the spare wheel well is a component manufactured or formed separately from the body, which is connected to the body during assembly of the motor vehicle. For example, the spare wheel well for this purpose at least partially or even completely encircling edge, which is placed on the mounting of the spare wheel well on the body on a corresponding bearing surface of the body. Subsequently, the spare wheel well is attached to the body, for example, positively and / or cohesively. Under the positive fastening, for example, the attachment by means of a screw, a bolt, a rivet or the like to understand. The cohesive fastening takes place for example by welding, soldering or the like, depending on a material of the spare wheel well and the body.

In the Muldenausnehmung the spare wheel well of the electrical energy storage can be arranged. The energy storage can also be referred to as an electric battery. It consists of at least one battery cell, but preferably of a plurality of battery cells, which are combined to form a battery group or a battery pack and for this purpose, for example, in a common battery housing. The energy storage is for example part of a vehicle electrical system of the motor vehicle. Preferably, it is present as a low-energy storage and accordingly has a source voltage of at most 100 V, at most 50 V, at most 48 V, at most 36 V, at most 24 V or at most 12 V. For example, the energy storage is designed as a lithium battery.

For cooling the energy storage, the spare wheel well has the at least one cooling channel, which serves to guide a coolant. The coolant is particularly preferably in the form of liquid coolant and is circulated during operation of the cooling device in a closed cooling circuit, of which the at least one cooling channel forms part. With such a design of the cooling device, a particularly efficient cooling of the energy store is achieved.

It can only be a single cooling channel part of the cooling device. Alternatively, the cooling device has a plurality of cooling channels, which fluidly separate from each other present or fluidically connected to each other. For example, the plurality of cooling channels are fluidically connected in parallel or in series. If, in the context of this description, only the cooling channel or the at least one cooling channel is discussed, the embodiments can always be applied to a plurality of cooling channels, in particular to each of the plurality of cooling channels.

The spare wheel well has both the plastic part and the preferably in heat transfer connection with the energy storage element. To form the at least one cooling channel, the open-edged recess is formed in the plastic part, which is closed by the application of the element in cross section. In other words, the depression is formed in the plastic part in such a way that it is open in the direction of the element, that is to say that it engages through a side of the plastic part facing the element. By interaction of the plastic part with the element, the recess is closed in cross-section, so that finally the cooling channel is present. In order to avoid leaks in the cooling channel, the plastic part is fluid-tightly connected to the element, for example, materially bonded. For example, the plastic part is glued to the element of the spare wheel well. However, it can also be provided that the plastic part is formed directly on the element, for example, is molded onto this.

The cooling channel has, on the one hand, a fluidic inlet and, on the other hand, a fluidic outlet. Through the inlet coolant can enter the cooling channel and on the other hand exit through the outlet of him. The inlet and the outlet are formed for example on the front side of the plastic part. However, it can also be provided that the inlet and / or the outlet are each in the form of a recess opening into the cooling channel, which opens at an angle to a longitudinal central axis of the cooling channel. The angle here is greater than 0 ° and smaller than 180 °, preferably it is 90 °, so that a vertical merging is realized. The opening may be formed in the plastic part or alternatively in the element of the spare wheel well.

With the described configuration of the spare wheel well, a particularly high reliability of the cooling device, in particular a permanent tightness, is realized with at the same time low assembly costs. So it is not necessary to arrange a plurality of individual parts in the spare wheel well or the Muldenausnehmung. Rather, only the plastic part is applied to the element of the reserve trough or formed adjacent to this.

Due to the open-edge design of the recess in the plastic part and complex three-dimensional curves of the cooling channel can be implemented. In addition, small local coolant circuits can be provided where the highest heat density is present during operation of the energy store or a large amount of heat is generated. Thus, the cooling device or the cooling channel can be adapted to the cooling requirement of the energy storage.

In addition, the cooling of the energy storage from outside, so there is no fluid passed through the energy storage itself, so that no fluid-related damage to the energy storage can occur. Also, the cooling device can be integrated into existing spare wheel wells, namely, for example, by the plastic part of the existing spare wheel well is assigned.

A further embodiment of the invention provides that the element is a metal part delimiting the hollow recess of the spare wheel well, or that the plastic part delimits the hollow recess of the spare wheel well and the element is present as the cover element closing the cross section at least one cooling channel. The first case essentially describes the integration of the plastic part in an existing spare wheel well, in which the metal element delimits the Muldenausnehmung. The present as a metal part element forms so far the above-mentioned soil and the wall. At this metal part, the plastic part is attached. Alternatively, the plastic part can limit the Muldenausnehmung so that it forms the floor and the wall.

The element or the element in heat transfer connection with the energy storage element is designed in the form of the cover element, which serves to close the open-edged recess for forming the cooling channel. Overall, an extremely flexible design of the spare wheel well is realized, wherein the cooling device can be used both in existing spare wheel wells as well as in other embodiments.

In the context of a further embodiment of the invention can be provided that the at least one cooling channel facing with its open-edge side of the trough recess or facing away from it. The open-edge side of the cooling channel is always associated with the element or is for closing the cooling channel to him. Due to the various refinements of the spare wheel well, to which already above was pointed out, however, different arrangements or orientations of the cooling channel or the plastic part can be implemented. Thus, the cooling channel may be facing, for example, with its open-edge side of the Muldenausnehmung.

In this case, the heat transfer connection between the cooling channel or the coolant present in it over the element, so for example via the metal part or the cover. In any case, a particularly efficient heat transfer between the coolant and the energy storage is ensured. Alternatively, the edge-open side of the cooling channel may be remote from the Muldenausnehmung. In this case, the heat transfer connection is over the plastic part. This also makes it possible to ensure particularly efficient heat transfer, for example by appropriate choice of the material of the plastic part. Preferably, a plastic having a high thermal conductivity is used.

A particularly preferred further embodiment of the invention provides that the plastic part is arranged in the trough recess or abuts on the side remote from the trough recess on the element. The arrangement of the plastic part in the Muldenausnehmung allows a particularly efficient heat transfer between the coolant and the energy storage or vice versa, whereas the arrangement of the plastic part outside the Muldenausnehmung, ie on the Muldenausnehmung side facing away from the element ensures a particularly excellent protection of the energy storage before the coolant.

A development of the invention provides that the cover is a film. In other words, the cover element is in the form of a thin metal or plastic sheet, which serves to form the cooling channel. The film is so far arranged or fixed to the plastic part, that the recess for forming the cooling channel in cross-section of the plastic part and the film is limited together. Particularly preferably, the energy store is located on the side of the foil facing away from the cooling channel. In this way, a particularly efficient heat transfer is ensured.

A further embodiment of the invention provides that the plastic part is attached to the element for sealing the at least one cooling channel by means of a bonding agent. The use of the adhesion promoter or primer ensures that the cooling channel is completely dense in cross-section, so that the coolant present in the cooling channel can not escape from it and, in particular, can not enter the depression recess.

A further preferred embodiment of the invention provides that the plastic part is produced by means of injection molding, blow molding, pressing or foaming. The plastic part can be formed separately from the element of the spare wheel well and only subsequently arranged on this or connected to it. However, it can also be provided that the plastic part is formed directly adjacent to the element. In any case, the plastic part can be produced particularly inexpensively by the mentioned methods.

A preferred development of the invention provides that the plastic part is arranged on a floor or on a wall of the spare wheel well. On the floor and the wall of the spare wheel well, which limit the Muldenausnehmung together, has already been noted. If the energy store is in the form of at least one prismatic cell, the arrangement of the plastic part on the ground is particularly preferably provided. If other cell shapes, for example pouch cells, are present, additionally or alternatively the arrangement can be provided on the wall. The cooling effect of the cooling device on the energy storage device can be adapted particularly effectively to the cooling requirements of the energy storage device.

Finally, it can be provided within the scope of a further embodiment of the invention that the energy storage rests directly or indirectly via a compensation element on the cover or the plastic part. To produce the heat transfer connection between the energy store and the cooling channel or the coolant therein, the direct arrangement of the energy store is particularly preferably provided on the cover or the plastic part, because in this way usually a particularly high heat transfer is realized.

However, to compensate for tolerances of the spare wheel well or the energy storage device, alternatively, only a merely indirect contact of the energy storage device with the cover element or the plastic part can be realized via the compensation element. The compensation element consists of a material which has a high thermal conductivity. For example, the compensation element is designed as a heat conducting pad. Both by the immediate and the indirect concern can be realized in this respect effective cooling of the energy storage means of the cooling device.

Of course, the invention also relates to a motor vehicle having a spare wheel well and at least one cooling device for cooling an electrical energy accumulator which is arranged or can be arranged in a recess of the spare wheel well. It is provided that formed in a plastic part of the spare wheel recess at least one open-edged recess which abuts the formation of a closed-channel cooling channel on an element of the spare wheel well, in particular on a standing in heat transfer connection with the energy storage element of the spare wheel well. For particularly advantageous developments of the motor vehicle or the spare wheel well, reference is made to the statements in the context of this description.

The invention additionally relates to a method for producing a spare wheel well for a motor vehicle, in particular a spare wheel well according to the statements within the scope of this description, wherein the spare wheel well has at least one cooling device for cooling an electrical energy store arranged or locatable in a recess of the spare wheel well. It is provided that in a plastic part of the spare wheel recess at least one open-edged recess is formed, which is applied to form a cross-sectionally closed cooling channel on an element of the spare wheel well, in particular on a standing in heat transfer connection with the energy storage element of the spare wheel well.

The advantages of such an approach or such an embodiment of the spare wheel well have already been pointed out. Both the spare wheel well and the method for their manufacture can be further developed according to the statements in the context of this description, so that reference is made to this extent.

• 1 eine schematische Darstellung einer Reserveradmulde für ein Kraftfahrzeug in einer ersten Ausführungsform, wobei in einer Muldenausnehmung der Reserveradmulde ein elektrischer Energiespeicher angeordnet ist,
• 2 eine schematische Darstellung der Reserveradmulde in einer zweiten Ausführungsform,
• 3 eine schematische Darstellung der Reserveradmulde in einer dritten Ausführungsform, sowie
• 4 eine schematische Darstellung der Reserveradmulde in einer vierten Ausführungsform.

The invention will be explained in more detail with reference to the embodiments illustrated in the drawings, without any limitation of the invention. Showing:

• 1 a schematic representation of a spare wheel well for a motor vehicle in a first embodiment, wherein in an indentation recess of the spare wheel well, an electrical energy storage is arranged,
• 2 a schematic representation of the spare wheel well in a second embodiment,
• 3 a schematic representation of the spare wheel well in a third embodiment, and
• 4 a schematic representation of the spare wheel well in a fourth embodiment.

The 1 shows a schematic representation of a spare wheel well 1 in a first embodiment. The spare wheel well 1 is to be arranged on or in a motor vehicle not shown here and formed. The spare wheel well 1 has a Muldenausnehmung 2 on top of a floor 3 as well as a wall 4 the spare wheel well 1 is limited. The floor 3 limits here the Muldenausnehmung 2 if the spare wheel well is arranged as intended 1 in geodetic view down and the wall 4 in the lateral direction. The wall 4 this goes from the ground 3 out and surrounds the Muldenausnehmung 2 preferably completely in at least one direction.

In the hollow recess 2 is an energy storage 5 arranged or at least be arranged, which serves for the intermediate storage of electrical energy. The energy storage 5 In this respect, for example, has at least one battery cell, in particular a lithium battery cell. The energy storage 5 has, for example, a housing 6 in which a plurality of battery cells are arranged. For cooling the energy storage 5 is a cooling device 7 provided and formed, which via at least one cooling channel 8th features. In the embodiment shown here are several cooling channels 8th formed, of which only a few are exemplified. The following is just a single of the cooling channels 8th received. However, the versions are always on the multiple cooling channels 8th transferable.

For the formation of the cooling channel 8th is in a plastic part 9 an open-edged recess 10 educated. The plastic part 9 is due to an element 11 the spare wheel well 1 , which with the energy storage 5 in heat transfer connection, in such a way that the recess 10 seen in cross section from the element 11 for the formation of the cooling channel 8th is closed. In other words, the plastic part lies 9 for the formation of the closed cross-section cooling channel 8th through the depression 10 at the with the energy storage 5 in heat transfer connection element 11 the spare wheel well 1 at.

In the illustrated here first embodiment of the spare wheel well 1 limits the element 11 the trough recess 2 So that's the bottom 3 and the wall 4 from the element 11 are formed. The element 11 is in the form of a metal part, which so far consists of metal. At the element 11 is the plastic part 9 attached, namely such that the cooling channel 8th with its edge-open side of the Muldenausnehmung 2 is facing. In addition, the plastic part lies 9 outside the hollow recess 2 before, namely on the Muldenausnehmung 2 opposite side of the element 11 , The energy storage 5 relies on a compensation element 12 on the ground 3 or the element 11 off, so the energy store 5 only indirectly via the compensation element 12 on the element 11 is applied.

The 2 shows a schematic representation of a second embodiment of the spare wheel well 1 , This is fundamentally similar to the first embodiment, so reference is made to the corresponding statements and will be discussed below only the differences. These are in that the plastic part 9 now in the Muldenausnehmung 2 is arranged, wherein the open-edge side of the cooling channel 8th the Muldenausnehmung 2 and therefore the energy storage 5 turned away. The compensation element 12 is not shown here, but may be optional.

The 3 shows a schematic representation of the spare wheel well 1 in a third embodiment. Reference is made to the comments on the other embodiments, in particular to the first embodiment, and reference is made only to the differences below. These are in that the plastic part 9 now the Muldenausnehmung 2 limited and according to the soil 3 and the wall 4 on the plastic part 9 are formed.

The element 11 on the other hand, it is present as a cover element which has the at least one cooling channel 8th seen in cross-section closes. The element 11 or the cover is formed in the embodiment shown here as a film. It can be seen that the energy storage 5 directly on the element 11 is applied, so that a particularly efficient cooling of the energy storage 5 is realized. The element 11 may be the function of the compensation element already described above 12 exercise. The compensation element 12 However, it may optionally be provided in addition.

The 4 shows a fourth embodiment of the spare wheel well 1 in a schematic representation. Again, reference is made to the comments on the other embodiments, in particular to the second embodiment, and discussed below only the differences. These are that again - as in the third embodiment - the plastic part 3 the trough recess 2 limited, and that the element 11 is designed as a cover, in particular as a film. The cooling channels 8th are with their open-edge side of the Muldenausnehmung 2 away. The energy storage 5 relies on the compensation element 12 on the element 11 or the soil 3 from.

With the described embodiments of the spare wheel well 1 can be a particularly simple and efficient cooling of the energy storage 5 respectively. Preferably, the plastic part 9 by means of an adhesion promoter on the element 11 attached, so that excellent tightness of the cooling channel 8th is guaranteed.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102009032768 A1 [0002]

Claims (10)

Spare wheel well (1) for a motor vehicle, comprising at least one cooling device (7) for cooling an electrical energy store (5) arranged or disposable in a depression recess (2) of the spare wheel well (1), characterized in that the spare wheel well is contained in a plastic part (9) (1) at least one open-edged recess (10) is formed, wherein the plastic part (9) for forming a closed-circuit cooling channel (8) through the recess (10) on an element (11) of the spare wheel well (1). Spare wheel well after Claim 1 Characterized in that the element (11) the Muldenausnehmung (2) of the spare wheel (1) is limiting metal part to which the plastic part (9) is fixed, or that the plastic part (9), the Muldenausnehmung (2) of the spare-wheel well ( 1) is limited and the element (11) as the at least one cooling channel (8) in cross-section occlusive cover exists. Spare wheel well according to one of the preceding claims, characterized in that the at least one cooling channel (8) faces with its edge-open side of the trough recess (2) or facing away from it. Spare wheel well according to one of the preceding claims, characterized in that the plastic part (9) is arranged in the recess recess (2) or abuts on the side facing away from the recess recess (2) on the element (11). Spare wheel well according to one of the preceding claims, characterized in that the cover element is a film. Spare wheel well according to one of the preceding claims, characterized in that the plastic part (9) for sealing the at least one cooling channel (8) by means of a bonding agent to the element (11) is attached. Spare wheel well according to one of the preceding claims, characterized in that the plastic part (9) is produced by means of injection molding, blow molding, pressing or foaming. Spare wheel well according to one of the preceding claims, characterized in that the plastic part (9) is arranged on a floor (3) and / or on a wall (4) of the spare wheel well (1). Spare wheel well according to one of the preceding claims, characterized in that the energy store (5) rests directly or via a compensation element (12) indirectly on the cover or the plastic part (9). Method for producing a spare wheel well (1) for a motor vehicle, in particular a spare wheel well (1) according to one or more of the preceding claims, wherein the spare wheel well (1) has at least one cooling device (7) for cooling one in a hollow recess (2) of the spare wheel well ( 1) arranged or arranged electrical energy storage device (5), characterized in that in a plastic part (9) of the spare wheel well (1) at least one open-edged recess (10) is formed, wherein the plastic part (9) for forming a closed-circuit cooling channel (8) by the recess (10) on an element (11) of the spare wheel well (1) arranged adjacent or formed.

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