DE102015202173B4 - Connection device for an energy storage device to a motor vehicle internal cooling system - Google Patents

Abstract

Connecting device (10) for an electrochemical energy storage device for use in a motor vehicle, which is adapted for the fluid-conducting connection of the energy store with a cooling system of the motor vehicle, while this connection device (10) at least one Durchströmausnehmung (32), which of a temperature control in a flow direction (40I, 40II) can be flowed through, and a contacting component (22, 22a), which is provided for electrical contacting of the connection device, said connection device comprises a plastic as a component or at least substantially consists of this, and wherein said plastic is electrically non-conductive, characterized in that the Durchströmausnehmung (32) at least in a contact region (41) is contacted by this tempering and that this contacting component (22, 22a) with this contact region (41) by a Stromleiteinrichtung (42, 42a, 42b, 42c) e electrically conductive is connected.

Description

The present invention relates to a connection device for connecting an electrochemical energy store to a motor vehicle internal cooling system. It is known that an energy storage device is connected to the cooling system of a motor vehicle, wherein the energy storage device via a connection device, in particular a connecting flange, is fluid-conductively connectable to the cooling system.

The energy which can be taken from an electrochemical energy store (accumulator) depends inter alia on the temperature of this store. For applications in a motor vehicle, it has proven to be advantageous to preheat the energy storage in the case of low temperatures and in the case of high temperatures, which may also occur during operation of the accumulator by the injection or withdrawal of energy to cool (tempering of accumulator). A particularly efficient type of temperature control is achieved by supplying cooling medium from the in-vehicle cooling system.

For mobile applications, ie in a motor vehicle, the weight of components and their production costs in the large numbers of vehicles typical in the automotive industry is of particular importance. It is therefore a general goal in the automotive industry to produce components from plastics. In the case of a rechargeable battery, which provides an electrical voltage, there may be potential differences / differences between this and other components of the motor vehicle train. Such potential difference are undesirable. Furthermore, the tempering media used in the motor vehicle internal cooling systems can be under overpressure. Both the desired electrical conductivity, as well as the mechanical stress when passing the tempering speak against the use of plastics for such connection flanges.

From the US 2012/0177960 A1 an electrical energy storage device with a cooling device for passing a cooling medium is known. From the DE 10 2012 214 783 A1 a heat exchanger for a battery unit for potential equalization between the heat exchanger and the housing of the battery is known.

It is an object of the invention to provide an improved connection flange, in particular a connection flange, which consists at least partially of a plastic, with improved electrical equipotential bonding.

A conventional plastic flange (plastic flange) has the problem that it is electrically insulating and potential equalization is not readily possible. Furthermore, it has proven to be a problem that tempering media in vehicle-internal cooling systems are frequently under overpressure and, as a result, the lines which are provided for guiding the temperature control medium, and in particular connection regions of these lines, are mechanically heavily loaded. These problems are in particular solved by providing a flow-through recess in a connection device according to the invention, which consists at least substantially of a plastic, which can be flowed through by a temperature-control medium in a flow-through direction. Furthermore, this flow-through recess has at least one contact region in which it can be contacted by the tempering medium. In addition, this contacting region is electrically conductively connectable to a contacting component of the connection device, in particular connectable via a current conducting device. This configuration of the connection device (connection flange) makes it possible to connect the temperature control medium in an electrically conductive manner to the contacting component, and thus to further components in connection therewith, in particular vehicle components. By means of this electrical connection between the temperature control medium and the contacting component, a connection device with potential equalization is achieved.

For the purposes of the invention, a connection device is to be understood as a device by means of which a temperature control medium can be conducted from an internal-vehicle cooling system to an electrochemical energy store. Preferably, this connection device is set up as a connection flange of a housing of the electrochemical energy store, or of a cooling system of the electrochemical energy store, with which it can be fluid-conductively connected to the motor vehicle-internal cooling system. Further preferably, the connection device has at least one Durchströmungsausnehmung, more preferably two Durchströmungsausnehmungen of which one is set up as an inlet and a drain.

In the context of the invention, a flow-through recess is to be understood as meaning a recess which is set up to be permeable by a temperature-control medium in a flow-through direction. Further preferably, a Durchströmungsausnehmung is to be understood as a recess in this connection device. Preferably, this connection device has at least one first flow-through recess for Feeding the tempering to the electrochemical energy storage and a second Durchströmungsausnehmung for discharging the tempering of this electrochemical energy storage on (inlet / outlet). Preferably, such a flow-through recess is arranged in an at least partially tubular region of this connection device. The flow-through recess is arranged in particular directly in the connection device, whereby a particularly simple construction is made possible. Preferably, the flow-through recess is arranged indirectly in the connection device, ie in a further component, in particular a tempering medium tube, which is inserted into the connection device. By an indirect arrangement of the flow-through in the connection device, it is possible that this component in particular has a high radial stiffness and so a particularly high reliability is achievable.

For the purposes of the invention, a contacting component is to be understood as meaning a component which, on the one hand, is set up for electrical contacting and, on the other hand, for the mechanical fastening of the connection device. Preferably, the contacting component is designed as a metallic fastening device, which can be arranged in the connection device.

• – Polyamid,
• – Polypropylen,
• – Polyethylen,
• – Polystyrol,
• – Polyvinylchlorid,
• – Acrylnitril-Butadien-Styrol,
• – Polytetrafluorethylen,
• – Polycarbonat,
• – Phenol-Formaldehyd,
• – Polysulfon
• – Polybutylenterephthalat,

und andere thermoplastische Werkstoffe.Preferably, the connection device has as a component a plastic, preferably the connection device, at least substantially consists of such a plastic. Preferably, a base body of the connection device consists of such a plastic. Further preferably, such a plastic is to be understood as an injection-moldable plastic. Preferably, this plastic is selected from a group of plastics comprising at least the following:

• - polyamide,
• - polypropylene,
• - polyethylene,
• - polystyrene,
• - polyvinyl chloride,
• Acrylonitrile butadiene styrene,
• Polytetrafluoroethylene,
• - polycarbonate,
• Phenol-formaldehyde,
• - polysulfone
• Polybutylene terephthalate,

and other thermoplastic materials.

According to the invention, the flow-through recess can be contacted by this temperature-control medium, at least in a contact region. Preferably, this contact region is to be understood as a surface portion or as a surface, this Durchströmungsausnehmung. In particular, the contact region is to be understood at least as a section of a tube inner surface.

Furthermore, this contact region can be electrically conductively connected to this contacting component via a current-conducting device. A current-conducting device is preferably an electrically conductive component, preferably an electrically conductive coating. Further preferably, a current-conducting device is to be understood as meaning a metallic component, such as, for example, a wire, a printed conductor or a yoke.

Further preferably, the connection device can be connected to a housing of the electrochemical energy store. For this purpose, a connecting element such as, for example, a metallic screw is used in this contacting component. The contacting component thus makes it possible to connect the connection device to the housing of the electrochemical energy store in an electrically conductive manner, thereby achieving potential equalization between the contacting component and the temperature control medium, with which the latter is in electrically conductive contact. In particular, by such potential equalization an improved connection device can be displayed.

In a preferred embodiment, the contacting component is at least partially made of a metallic material. The contacting component preferably has an internally threaded portion, which is set up in particular for receiving a fastening screw. Preferably, this internally threaded portion is adapted to cooperate with the connection of the connection device with another housing component, in particular the housing of the electrochemical energy store. Further preferably, this Kontaktierungsbauteil is understood as a Gewindeinsert which is screwed into this connection device or integrally connectable with this. In particular, by the use of a threaded insert is a particularly simple electrical connection can be displayed and thus a potential equalization can be achieved and an improved connection device can be displayed.

In a preferred embodiment, this contact region is arranged on an inner surface of the flow-through recess. Preferably, this inner surface of the flow-through at least in the contact region as a component of a metallic material. In particular, the flow-through recess has a metallic coating in the contact region. Preferably, the Durchströmungsausnehmung arranged in a Temperiermediumsrohr. Further preferably, this Temperiermediumsrohr is set up to conduct the Temperiermediumsstroms by this connection device. In particular, the fact that a metallic coating or a metallic Temperiermediumsrohr is provided, a particularly simple equipotential bonding and thus an improved connection device can be displayed.

In a further preferred embodiment, the Temperiermediumsrohr as an ingredient on an aluminum material or steel material or consists of one of these materials. In connection with high-pressure vehicle cooling systems, in which the temperature control medium is under pressure of 20, 30 and more bar pressure, it has been found that the aforementioned materials have the necessary strength and rigidity to guide the temperature control medium safely through the connection device. Especially in cooling systems in which the tempering medium is CO2 or at least substantially CO2, high pressures for operation are necessary. In such systems operating pressures of 120 bar and more are achievable with corresponding effects on the sizing of the components. In order to be able to use such a tempering medium safely, the connection device must also be set up to meet these requirements. With a connection flange according to the invention, it is possible to use a lightweight plastic for the base body, to provide solid tubes for receiving the flow openings and to connect at least one contacting component in an electrically conductive manner to the flow opening and thus to provide an improved connection device.

In a preferred embodiment, the Temperiermediumsrohr is set up for the passage of a CO2 tempering and has as an ingredient on an aluminum or steel material or consists of this. The tempering medium tube preferably has a wall thickness of 0.75 mm or more, preferably 1 mm or more and preferably 1.5 mm or more. Further preferably, the Temperiermediumsrohr a wall thickness of 5 mm or less, preferably of 3 mm or less, and preferably of 2 mm or less. Investigations have shown that, in particular with such a wall thickness, on the one hand sufficient strength of the temperature control medium tube can be represented and, on the other hand, the weight of the connection device is low. In particular, by the use of such Temperiermediumsrohrs an improved connection device can be displayed.

In a preferred embodiment, the current-conducting device is formed integrally with this connection device. Preferably, a one-piece design of the Stromleiteinrichtung with the connection device can be achieved in that an electrical conductor is poured into the connection device, or at least partially completely surrounded by this. Preferably, the Stromleiteinrichtung is formed as a cast-in conductor track.

In a further preferred embodiment, the current-conducting device is applied as a coating on a surface of the connection device. Further preferably, the Stromleiteinrichtung is to be understood as a, at least partially applied, metallic coating of the connection device. In particular, by the one-piece design of the Stromleiteinrichtung with the connection device, a particularly cost-effective structure of this is possible and thus an improved connection device can be displayed.

In a preferred embodiment, the current conducting device is designed as an at least partially metallic, separate connecting device. Preferably, it is to be understood separately in this sense that the current conducting device is at least partially not integrally received in or on the connecting device. Further preferably, the current-conducting device can be embodied as a metal strap, preferably a metal clip or particularly preferably a cable. Further preferably, the Stromleiteinrichtung is arranged as an electrical conductor between the Temperiermediumsrohr and the contacting component. In particular, by a separate connection of the contacting device with the contact area a particularly secure connection of these is represented.

In a preferred embodiment, the Stromleiteinrichtung is at least connected to the Temperiermediumsrohr or the contacting component or both preferably cohesively, preferably form-fitting or particularly preferably non-positively. In particular, by the aforementioned type of connection, a particularly secure electrically conductive connection can be produced and thus an improved connection device can be displayed.

In a preferred embodiment, the connection device comprises as a component a fiber-reinforced plastic or preferably consists, at least substantially, of such a fiber-reinforced plastic. In particular, fiber-reinforced plastics are particularly easy to produce and have a relatively high strength and thus an improved connection device can be displayed.

In a preferred embodiment, the reinforcing fibers are partially or completely in an angle between 0 and 60 °, relative to the direction of flow, in which the Durchströmungsausnehmung is flowed through by the temperature control, aligned. Preferably, the reinforcing fibers are arranged annularly or preferably helically around the flow-through recess. Preferably, the reinforcing fibers are oriented only in the region of the flow-through at this angle. Further preferably, the reinforcing fibers are aligned at an angle between 0 and 45 ° and preferably at an angle between 5 and 30 ° to the flow direction. By such an orientation of the reinforcing fibers, a particularly high rigidity of the connection device in the region of the flow-through recess, in particular in the radial direction, can be achieved, and thus an improved connection device can be produced.

In a preferred embodiment, the fiber-reinforced plastic, in particular based on the volume, at least on average, a fiber content of 5% or more. Preferably, the fiber-reinforced plastic has a fiber content of more than 15%, and preferably of more than 25%. Further preferably, the fiber-reinforced plastic has a fiber content of less than 75%, preferably less than 66% and preferably less than 40%. Further preferably, the reinforcing fibers are aligned in the connection device at least partially multidirectional. Further preferably, the reinforcing fibers in the connection device are arranged in regions multidirectional and partially unidirectionally directed. In this sense, multidirectional is to be understood such that the reinforcing fibers have no preferred orientation. In particular, by a fiber content from the range mentioned is a particularly light and strong connection device can be displayed.

• – Kunststofffasern, insbesondere Nylon- Polyamid- oder Aramidfasern,
• – Stahlfasern,
• – Glasfasern,
• – Carbonfasern oder

eine Mischung auf wenigstens zwei der genannten Fasertypen.In a preferred embodiment, the reinforcing fibers are selected from a group having at least the following fiber types:

• Plastic fibers, in particular nylon-polyamide or aramid fibers,
• - steel fibers,
• - glass fibers,
• - Carbon fibers or

a mixture of at least two of the mentioned fiber types.

Investigations have shown that particularly solid components can be represented, in particular with the fiber types mentioned, and thus an improved connection device can be produced.

According to the invention, the connection device can be used in an electrochemical energy store, in particular an accumulator, which is provided as a so-called traction battery in a motor vehicle. The connection device according to the invention makes it possible to produce a particularly light and reliable electrochemical energy store for a motor vehicle.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments of the invention with reference to the accompanying, partially schematic drawings. In these shows:

1 perspective connection flanges shown with various possibilities of electrical connection of the contacting with the Temperiermediumsrohr,

2a a perspective view of a connecting flange and 2 B a top view of this connection flange,

2 B a plan view of the connection flange 2a ;

2c a sectional view of the connection flange along the line II-II in 2 B ;

2d a sectional view of the connection flange along the line III-III in 2 B ;

3a a perspective view of a connecting flange;

3b a plan view of the connection flange 3a .

3c a sectional view of the connection flange according to the line IV-IV in 3b .

4 a perspective view of an electrochemical energy storage housing with a connecting flange according to the invention.

In 1 are different embodiments of a connection flange 10 shown. In 1a has the connection flange 10 a tempering medium tube 32 _I on which is set up as a return line. It flows through the return line 32 _I the temperature control medium not the direction of the flow direction 40 _I from the housing of the electrochemical energy storage (not shown) in the motor vehicle internal cooling system (not shown) back. The electrochemical energy storage is the tempering through the as a feed line 32 _II trained Temperiermediumsrohr supplied. The temperature control medium flows in direction 40 _I in the electrochemical energy storage.

The connection flange 10 is by means of metal inserts 22 . 22a , where the metal insert 22a is formed as Kontaktierungsbauteil, connectable to the housing of the electrochemical energy store. The metal insert 22a is over the wire hanger 42a (Conductor) electrically conductive with the Temperiermediumsrohr 32 _II and thus with a contact area (not shown) in this tube, which contacts the temperature control medium as it flows through.

By this arrangement, a potential equalization between the temperature control medium and the housing of the electrochemical energy storage and other vehicle components is made possible.

1b shows a further embodiment of the invention. Below ( 1b and 1c ) is based on the main differences to those in 1a illustrated embodiment received. The supply line 32II is in this embodiment via a metal plate 42b with the metal insert 22a connected. In this embodiment, a contact surface between the Stromleiteinrichtung (metal plate 42b ) and the metal insert 22a and the Temperiermediumsrohr 32 _II lowered, whereby the electrical resistance is lowered and the equipotential bonding is improved.

In 1c a further embodiment of the invention is shown in which the supply line 32 _II over a clamped metal clasp 42c (Stromleiteinrichtung) with the metal insert 22a connected is. Such a metal clasp 42c is particularly easy to install and has a relatively large contact surface to the metal insert 22a and to the supply line 32II on, whereby the equipotential bonding is improved.

The 2a to 2d show a connection flange 10 an electrochemical energy storage, which serves the connection of the cooling device with a vehicle-side refrigerant or coolant circuit. The connection flange 10 has a, at least substantially, trapezoidal base plate 12 made of a fiber-reinforced plastic whose corners are rounded and the two diagonally opposite connection points 14 for the tempering medium.

Each of the connection points 14 includes one in the base plate 12 trained Durchströmungsausnehmung 16 as well as one piece with the base plate 12 manufactured, tubular projection 18 , The two projections 18 extend on the side facing the vehicle-side cooling or cooling medium side (in 2c Left). Also on the electrochemical energy storage system side facing are the Durchtrittsausnehmungen 16 around small projections 19 educated; furthermore, the base plate points 12 Stiffening ribs on both sides 20 for stabilization.

The base plate 12 is together with the projections 18 . 19 and the stiffening ribs 20 produced in an injection molding of plastic.

The connection flange 10 has a total of four on the base plate 12 arranged fasteners 22 respectively. 24 , which are formed as metal inserts.

A metal insert is understood as a component which can be inserted in the manufacture of the connection flange, so that it is extrusion-coated by the plastic, or as a subsequently insertable or screw-in component.

For connecting the connection flange 10 with the housing of the energy storage system, the fastening elements ( 22 . 24 ) each have a thread 26 on, by one in the base plate 12 arranged insert 28 made of metal, in particular steel, is formed (see in particular 2d ).

Here are the fasteners 22 at diagonally opposite corners in an edge region of the base plate 12 arranged and serve to screw the connection flange 10 with the housing of the energy storage system or the cooling device of the electrochemical energy storage. The fasteners 24 are in an inner area of the base plate 12 arranged and lying on a line, which is an imaginary connecting line between the two connection points 14 crosses at right angles. These fasteners 24 serve the screwing of fluid lines and / or valves, such as an expansion or shut-off valve, which belong to a vehicle-side refrigerant or coolant circuit, with the connection flange 10 ,

Furthermore, two Temperiermediumsrohre 30 for fluid connection of the connection flange 10 provided with the cooling device of the battery system connected to the connection points 14 completely through the connection flange 10 or through the tubular projections 18 . 19 passed through. The Temperiermediumrohre are made of aluminum and thus have a high rigidity over plastic. Especially when using CO2 as tempering medium, which is under high pressure, a high rigidity (in the radial direction) has a particularly positive effect on the reliability of the connection flange 10 out.

On the in 2c right side, so the vehicle-facing side, has each of the tubes 30 a passageway 32 for connection to a vehicle-side refrigerant or coolant circuit. The pipes 30 are in the connection flange 10 or the base plate 12 pressed, glued, and / or overmoulded with the plastic. When in the 2 As shown embodiment, therefore, the fluid is not in direct contact with the plastic of the connection flange 10 , At least one of the Temperiermediumrohre 30 has a contact area inside 41 on, which can be contacted by the tempering medium when flowing through.

In order to ensure a sufficient rigidity of Temperiermediumrohre have these have a mean wall thickness TI, TII. The tempering medium pipes 32 are in opposite directions of flow 40I . 40II can flow. The contact area 41 is via the electrical line 42 (Stromleiteinrichtung) for equipotential bonding with at least one of the metal inserts 22 connected. Here is the electrical line 42 in the connection flange 10 recorded and not recognizable from the outside.

For sealing against the housing of the energy storage system, the base plate 12 also a multi-part circumferential sealing frame 34 or a one-piece sealing frame with multiple sealing lips.

Additionally is in 2d recognizable as the electrical line 42 to the metal insert 22 is guided and contacted this for equipotential bonding.

The 3a to 3c show a connection flange 10 an electrochemical energy store, wherein the differences to previously described embodiments will be discussed below.

The connection flange 10 is different from that in the 2 shown by the fact that the pipes 30 for fluid connection of the connection flange 10 with the cooling device of the battery system only on one side at the connection points 14 in the connecting flange 10 or in the tubular projections 19 protrude. In this embodiment, therefore, the cooling fluid is in direct contact with the plastic of the connection flange 10 , Again the pipes are 30 in the connecting flange 10 pressed, glued and / or overmoulded with the plastic of the connection flange. The vehicle-side cables are at the connection points 14 or the projections 18 placed on the flange or in the projections 18 inserted and by means of fasteners 24 with the base plate 12 screwed.

Next is in 3c clarifies the orientation of the reinforcing fibers of the plastic. This fiber orientation is independent of the design of the connection flange according to the invention. The reinforcing fibers become at least substantially in the radial direction about the flow direction 40 _II oriented. By means of this ring-like alignment of the reinforcing fibers around the passage recess, a particularly high radial rigidity of these can be achieved. The orientation 43 the reinforcing fibers (not shown) closes with the flow direction 40II the angle α.

4 shows a perspective view of a housing 50 for an electrochemical energy store in a motor vehicle. By, with the case 50 connected connection flange 10 , temperature control medium in the housing 50 or flow into and out of a cooling system of the energy storage. In this case, heat is supplied to the energy store via a tempering medium flow (preheating) or dissipated (cooling). The housing 50 has fastening means 52 for connection to the motor vehicle. In the interior 51 of the housing 50 are energy storage cells (not shown) can be arranged. The housing 50 is closed by means of a lid (not shown).

Claims (14)

Connection device ( 10 ) for an electrochemical energy store for use in a motor vehicle, which is set up for the fluid-conducting connection of the energy store with a cooling system of the motor vehicle, this connection device ( 10 ) at least one Durchströmausnehmung ( 32 ), which of a temperature control medium in a flow direction ( 40I . 40II ) is flowed through, and a contacting component ( 22 . 22a ), which is provided for electrical contacting of the connection device, wherein this connection device comprises a plastic as a component or at least substantially consists of this, and wherein this plastic is electrically non-conductive, characterized in that the Durchströmausnehmung ( 32 ) at least in one contact area ( 41 ) is contactable by this temperature control medium and that this contacting component ( 22 . 22a ) with this contact area ( 41 ) by a current conducting device ( 42 . 42a . 42b . 42c ) is electrically conductively connected. Connecting device according to claim 1, characterized in that the contacting component ( 22 . 22a ) as a component comprises or consists of a metallic material and has an internal thread. Connecting device according to one of the preceding claims, characterized in that the contact region ( 41 ) on an inner surface of the Durchströmungsausnehmung ( 32 ) is arranged, that the inner surface of the flow-through, at least in the contact region, as a component comprises a metallic material, in particular a metallic coating or as a metallic Temperiermediumsrohr ( 30 ) is trained. Connecting device according to claim 3, characterized in that the Durchströmungsausnehmung ( 32 ) receiving metallic tempering medium tube ( 30 ) as an ingredient has an aluminum material or steel material or consists of one of these materials. Connecting device according to claim 4, characterized in that the Temperiermediumsrohr is adapted for the passage of a CO ₂ -Mediums and that Temperiermediumsrohr ( 30 ) has a wall thickness (T _I , T _II ) of 0.75 mm or more, preferably 1 mm or more and preferably 1.5 mm or more and further 5 mm or less, preferably 3 mm or less and preferably from 2 mm or less. Connecting device according to one of the preceding claims, characterized in that the current conducting device ( 42 ) is formed integrally with the connection device. Connecting device according to claim 6, characterized in that the current conducting device ( 42 ) is formed as a metallic coating of the connection device or as an electrical conductor accommodated at least partially within the connection device. Connecting device according to one of claims 1 to 4, characterized in that the current conducting device ( 42a . 42b . 42c ) is formed as an at least partially metallic, separate connection direction. Connecting device according to claim 7, characterized in that the current conducting device ( 42 . 42a . 42b . 42c ) at least with the Temperiermediumsrohr ( 30 ) or the contacting component ( 22 . 22a ) or both cohesively, positively or positively connected. Connecting device according to one of the preceding claims, characterized in that it comprises a fiber-reinforced plastic as a component. Connecting device according to claim 10, characterized in that reinforcing fibers in the region of Durchströmausnehmung ( 32 ) a preferred orientation ( 43 ) that the reinforcing fibers are partially or completely at an angle between 0 ° and 60 °, relative to a flow direction ( 40 _I , 40 _II ), in which the Durchströmungsausnehmung of the temperature control medium can be flowed through, aligned (α) are, preferably between 0 ° and 45 °, preferably between 5 ° and 30 ° are aligned. Connecting device according to one of claims 10 or 11, characterized in that the fiber-reinforced plastic on average a fiber content, preferably by volume, of more than 5%, preferably more than 15% and preferably 25% or more and less than 75%, preferably less than 66% and preferably less than 40%. Connection device according to one of claims 10 to 12, characterized in that the reinforcing fibers are selected from a group comprising at least the following fibers: - Kunstofffasern, in particular nylon or polyamide fibers, - steel fibers, - glass fibers, - carbon fibers or a mixture of at least two of fiber types mentioned. Electrochemical energy storage device with a housing ( 50 ) for use in a motor vehicle with a connection flange ( 10 ) according to any one of the preceding claims.

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