DE102016115647B3 - Battery carrier for an electric motor vehicle and method for assembling and mounting a battery carrier - Google Patents

Abstract

The present invention relates to a battery carrier (1) for an electric motor vehicle and to a method for assembling and mounting the battery carrier (1). The battery carrier (1) according to the invention is characterized in that the trough (3) in an assembly position for receiving at least one battery (2) with its opening (9) on the motor vehicle vertical direction (Z) facing upwards can be arranged and in the installed position with its opening (9) facing downward in the motor vehicle vertical direction (Z), the opening (9) being closed by a cover (12).

Description

The present invention relates to a battery carrier for an electric motor vehicle according to the features in the preamble of claim 1.

The present invention further relates to a method for assembling and mounting a battery carrier in an electric motor vehicle.

In the prior art motor vehicles are known to bring people or loads from one place to another place. For this purpose, these motor vehicles have a motor vehicle bodywork, to which on the one hand the chassis component and on the other hand at least one drive unit comprises. As drive units mostly internal combustion engines are used, which convert the chemical energy contained in the fuel into drive energy. The transformation process is limited by the ideal carnot process. Thus, up to about 40% of the chemical energy contained in the fuel can currently be converted into driving energy. The remaining energy is dissipated by friction and waste heat, in particular via the exhaust gas. In addition, due to the combustion process emissions, which are also discharged via the exhaust gas to the environment.

Electric mobility has therefore become increasingly important in recent years. The drive unit used here is an electric motor, which in turn receives its electrical energy from batteries or itself via an electricity generator of an internal combustion engine.

Particularly in the batteries, progress has been made with the ion technique which, by reducing the internal resistance, makes it possible to charge the cells of the batteries connected in series or in parallel in a shorter time than cells with gel- or tether-bound electrolytes as well as more charge cycles with little power loss and to allow for longer battery life. Batteries are also referred to as energy storage or accumulator, in short form as a battery, or as a traction battery. Whereas in the past lead-acid steel accumulators were used, today in electrically driven vehicles nickel-metal hybrid or lithium-ion accumulators, in particular lithium-iron-phosphate accumulators, are in use. Such a vehicle is referred to below as an electric motor vehicle.

The power output as well as the lifetime of such batteries are temperature dependent. On the one hand, the power output at low temperatures, in particular below 10 ° C, decreases as the mobility of the charge carriers in the batteries decreases. During operation, and thus during power extraction, especially at a high electric current, the batteries heat up. The calendar aging of the battery is reduced when operating temperatures, in particular above 30 ° C.

Therefore, cooling and / or heating systems for batteries in electric vehicles are known from the prior art.

Unlike a starter battery, traction batteries require a relatively large amount of space due to the capacity required for the energy to be stored and are relatively heavy. The required for the drive amount of batteries each consisting of several cells can have a total mass of up to several hundred kilograms. The batteries are therefore preferably arranged in the underfloor area of electric motor vehicles. In particular, for the purpose of mountability in the motor vehicle, but also to provide a corresponding cooling and heating system, the batteries are housed in a battery carrier. Such a battery carrier is also referred to as a "battery tray".

From the DE 10 2010 004 549 A1 a battery system for a motor vehicle is known in which a floor is displaceable in the vertical direction.

From the JP 2009 231125 A Furthermore, a battery arrangement is known in which individual battery cells are arranged on a support plate and accommodated in a housing.

Object of the present invention is to provide starting from the prior art, a battery carrier, which has a simple equipping with batteries and at the same time allows easy mounting of the battery carrier on or in the motor vehicle and optionally provides a highly effective cooling system.

The present object is achieved in a battery carrier for an electric motor vehicle with the features in claim 1.

A procedural part of the object is achieved with a method for equipping and mounting a battery carrier in an electric motor vehicle according to the features in claim 12.

Advantageous embodiments of the present invention are described in the dependent claims.

The battery carrier for an electric motor vehicle is in an underfloor area of a Electric motor vehicle arranged. The invention thus also relates to an electric motor vehicle having a corresponding arrangement with a battery carrier mounted thereon or therein. The battery carrier is mounted in particular below the body of the electric motor vehicle. The battery carrier itself has a trough for receiving at least one battery, preferably a plurality of batteries and a lid which closes the trough. The tub and the lid can be at least partially formed of metallic material. It is also conceivable that the tub and / or the lid are made of a plastic material or fiber composite material.

According to the invention, the battery carrier is characterized in that the trough of the battery carrier can be oriented upward in a mounting position for receiving at least one battery or for equipping with at least one battery with its opening in the vertical direction of the motor vehicle. In the installed position in the electric motor vehicle, the battery tray is disposed with the opening facing downward in the automotive vertical direction, the opening being closed by a lid.

This offers the advantage according to the invention that the tray is arranged with its opening facing upwards for equipping the battery carrier. Each battery can be inserted into the tub and is there due to gravity on the bottom of the tub. Thereafter, each battery is fixed in position in the tub, which is done for example by a screw and / or terminals of the batteries. The tub preassembled in this way with at least one battery is subsequently rotated by 180 °. Each battery thus hangs in the tub. In particular, the poles for electrical connection of the battery depend on the motor vehicle vertical direction downwards. The tub is then mounted below a motor vehicle body. Before or after turning each battery can be equipped with an electrical connection, so that they are electrically coupled to each other or to an electrical device or to corresponding electrical lines to be electrically connected to the drive unit during assembly in the motor vehicle.

Before or after turning then the tub can also be closed with the lid. In particular, the tub and lid are fluid-tightly coupled to each other, so that fluids or gases can neither enter nor escape from an interior of the battery carrier. The lid can be joined by gluing or even by screws to the tub.

In a further preferred embodiment variant, the trough has a base and an outer peripheral frame, wherein a cooling system is arranged on the opposite side of the trough bottom touched by the battery bottom, wherein the cooling system is arranged in the installed position above the battery carrier, thus between battery carrier and motor vehicle body , This offers the particular advantage that the cooling system can be arranged flat on the bottom of the trough, so that the heat given off by each battery due to the surface contact of the system can be dissipated effectively via the bottom and the cooling system. The cooling system is in particular further away than the cover or the edge of the frame from the road surface, so that damage to the cooling system, in particular the cooling lines, for example due to touchdown or touching an obstacle or an object on the road surface and a driving under objects are avoided. Due to the fact that each battery is contacted in particular flatly with the ground, there is effective heat conduction from the battery to the ground as well as heat dissipation via the cooling system coupled to the ground or integrated into the ground. Because the cooling system is arranged between the motor vehicle body and the battery carrier, there is no heating of the interior of the electric motor vehicle due to the cooling system.

In particular, mounting supports for receiving at least one battery are arranged in the tub. The mounting supports may be, for example, a rib structure or transverse strut structure, formed by transverse webs and / or longitudinal webs within the tub. Each battery is particularly coupled by screws to the mounting brackets. This in turn offers the advantage that during a repair or maintenance a single battery can be removed from the battery carrier or replaced. In the installation position of the battery carrier or in the installed state of the battery carrier in the vehicle body each battery is mounted hanging, which can also be referred to as overhead mounting. However, this does not mean that a battery hangs freely in the battery tray. Rather, each battery is mounted adjacent to the bottom of the tub. In particular, each battery is mounted under tension on the ground so that a contact pressure and thus a surface contact of the batteries is ensured at the bottom of the tub. Compared with a line-shaped or punctiform installation, better heat conduction from the battery to the bottom of the trough takes place through a planar system, which also leads to a better cooling behavior of each battery during operation of the electric motor vehicle, in particular during charging or discharging with high current intensity. Also it is conceivable that one Intermediate layer between the battery bottom and the bottom of the tub is incorporated. The intermediate layer improves the system contact of battery bottom on the ground and thus the heat conduction from the battery into the ground or the cooling system. In particular, the intermediate layer is a thermal compound. It is also conceivable that a thin bottom is chosen such that when pressurizing the cooling system with an overpressure, the bottom of the tub is pressed against the battery bottom. The contact with the system also improves the heat transfer here.

Further preferably, a layer with a bulge structure and / or honeycomb structure is arranged on or on the lid, which serves in particular as underrun protection. As honeycomb sizes in particular key widths of 17 mm, 33 mm, 39 mm or 50 mm are used. The honeycomb structure or arch structure serves in particular to further increase the strength and the component rigidity of the lid. This increase in strength and rigidity is provided here by an underrun protection, so that a better protection of the battery carrier is given in a collision with an object of the motor vehicle from below. However, the increased strength and rigidity result in particular as shear field. Consequently, a better strength or higher rigidity in the surface direction of the layer or of the cover is provided. In addition, there is the advantage that in cases of damage of varying severity on the underbody of the vehicle only one layer with a vault structure or the one layer and the cover must be replaced while the batteries and the cooling system remain undamaged. A complete replacement of the entire battery carrier is not necessary.

The position with the arch structure or honeycomb structure can be formed from a metallic material. However, the layer itself may also be formed of a fiber-reinforced material, in particular of a glass-fiber-reinforced polymer material or of a co-polymer.

The bottom of the tub is designed in particular as a double bottom, wherein the cooling system is arranged in the double bottom. Thus, the raised floor offers the advantage that the double floor accommodates the cooling system on the one hand and on the other hand, the raised floor serves as an insulator, so that no additional heat takes place in the direction of an interior of the vehicle body. Further preferably, the two double bottom layers are electrically conductively bonded to each other. As a result, a greater shielding attenuation and Ableitfähigkeit in relation to the electromagnetic compatibility (EMC) of the battery carrier is realized.

Further preferably, an electrical line system is arranged between at least one battery and the lid. The electrical line system binds each battery to another and / or to the high-voltage (HV) board network of the electric motor vehicle. In particular, this may be an insulated copper rail arrangement with electrical isolation. This is in particular a pre-assembled and tested unit. This can then be arranged between each battery and the lid. Preferably, the line system on spring contacts, such that when the lid is closed, the spring contacts abut the poles of each battery and tie them electrically to each other and to electrical lines for connection to the electric motor vehicle. For example, these are deep-drawn resilient connection pins. This offers in particular the advantage that after fitting the tub with at least one battery, the electrical line system can be arranged and an electrical connection of each battery is given by mounting the lid with the tub. The battery tray with at least one battery therein may then be electrically tested and each battery preconditioned for use in the vehicle. This means that each battery is charged in a certain way by an electric current dependent on the state of charge with electrical energy. Also, the contacts of the wiring harness can be cohesively and / or positively and / or positively coupled to the poles of the batteries.

Further preferably, the lid is coupled fluid-tight with the tub. In particular, the lid is joined to the tub by screws, incorporating a seal.

• – Bereitstellen der Wanne, ausgerichtet mit ihrer Öffnung auf die Vertikalrichtung nach oben gerichtet,
• – Einsetzen und mechanisches Koppeln von wenigstens einer Batterie in der Wanne,
• – Schließen der Wanne mit einem Deckel und Drehen des Batterieträgers um etwa 180 Grad, so dass die Batterien in der Wanne hängen und
• – Montieren des Batterieträgers unter dem Kraftfahrzeug, so dass die Öffnung der Wanne mit dem Deckel nach unten gerichtet ist.

The present invention further relates to a method for equipping a battery carrier with at least one battery and then mounting the stocked battery carrier in an electric motor vehicle. For this purpose, the method has the following steps according to the invention:

• Providing the trough, aligned with its opening in the vertical direction upwards,
• Inserting and mechanically coupling at least one battery in the tub,
• - Close the tub with a lid and turn the battery tray about 180 degrees so that the batteries hang in the tub and
• - Mounting the battery tray under the motor vehicle, so that the opening of the tub with the lid is directed downward.

With the battery carrier according to the invention, however, a method can continue to be carried out, after which the profile is provided and the profile ends are edited and appropriate cutouts are performed so that the corners can be bent. Preferably, two circumferential sections are thus provided here in plan view as a C-shape of the frame and the ends of the C-shape joined together. Following this, the dividers are inserted into the frame and, in turn, the batteries are attached between the dividers. Optionally, an electrical connection of the batteries can already take place. If an electrical connection is made, the cover can already be put on to close the tub, in particular it can be glued. The lid already preferably still has the cooling system. Following this, the frame is preferably rotated with the batteries inserted, in particular by 180 ° and the actual bottom of the tub is coupled to the frame to form the tub. In particular, the floor is coupled in such a way that it rests against the respective battery bottom at least in a form-fitting manner. In particular with a surface pressure. There is an optional leak test and continue to install an underrun protection on the lid or the cooling system. Then the battery carrier can be conditioned with the batteries used, thus electrically charged. The battery carrier thus produced with batteries inserted can then be mounted in the underfloor area of an electric motor vehicle.

Further advantages, features, characteristics and aspects of the present invention are the subject of the following description. Preferred embodiments are shown in the schematic figures. These are for easy understanding of the invention. Show it:

1 a battery tray in position for placement with at least one battery in a perspective view;

2 a cross-sectional view according to the section line II-II 1 but rotated 180 degrees;

3 a longitudinal sectional view according to the section line III-III 1 also rotated 180 degrees;

4 a battery carrier according to the invention in the installed position in an electric motor vehicle;

5 a tub according to the invention in plan view;

6 the frame during its manufacture in plan view;

7 an inventive manufacturing method for a frame in plan view;

8th a cross section through a hollow profile for the production of a frame;

9 a hollow profile in plan view during manufacture;

10 a bent corner of a hollow profile;

11 two dividers in a perspective view to form a receiving opening;

12 a cross-sectional view of a battery carrier according to the invention in the installed position in a motor vehicle with batteries;

13 a cross-sectional view through a tub according to the invention with an inclined inner wall;

14 a longitudinal sectional view through a battery carrier with cooling system;

15 a partial longitudinal sectional view through a battery carrier according to the invention with a cooling system;

16 a three-dimensional floor;

17 an example of a cooling system in plan view.

In the figures, the same reference numerals are used for the same or similar components, even if a repeated description is omitted for reasons of simplicity.

1 shows a battery carrier 1 in perspective view. The battery carrier 1 is in a position to work with at least one battery 2 to be equipped. This is the tub 3 through an outside surrounding frame 4 , made of hollow sections 5 , as well as formed by a not visible in this illustration floor. Within the frame 4 are individual dividers 6 , also preferably formed from hollow profiles 5 arranged. The dividers 6 are preferably designed as a mounting bracket. The battery carrier 1 will then be in this position with at least one battery 2 stocked. Due to the gravitational force g are the batteries 2 on the ground 8th on and can by coupling with the ground 8th be held, for example by screwing, but also alternatively or additionally by a clamping or snap fixation. Preferably, each battery 2 with the ground 8th coupled with the formation of a preload force, so that each battery 2 flat on the ground 8th issue.

When the assembly is complete, the battery carrier becomes 1 around a central longitudinal axis 7 rotated about 180 degrees. The opening 9 the tub 3 then shows no longer upwards with respect to the automotive vertical direction Z, as in the case of equipping with at least one battery 2 the case was, but down.

A cross-sectional view and a longitudinal sectional view are in the 2 and 3 shown, in which case the battery carrier 1 with the opening 9 is shown pointing down. On the outside is the surrounding frame 4 with the hollow profiles 5 arranged. The frame 4 is encircling with a floor 8th , in particular fluid-tight, coupled. Within the frame 4 and the floor 8th trained tub 3 is at least a battery 2 arranged. An opening 9 the tub 3 now shows down to the motor vehicle vertical direction Z down. The battery carrier 1 is located with the at least one battery disposed therein 2 thus in an installed position in the electric motor vehicle. The batteries 2 For this purpose, for example, via the graphically indicated screws 10 to the ground 8th , the frame 4 and / or the dividers 6 be joined. A battery bottom 11 is like that with the adjacent soil 8th surface in contact that there is an increased surface pressure.

The opening 9 is through a double-layered lid 12 closed, leaving an interior space 13 of the battery carrier 1 in which also at least one battery 2 is arranged, is isolated from the environment U. For this purpose, in particular the lid 12 and the tub 3 coupled fluid-tight with each other. An outer situation 14 has a vault structure or honeycomb structure. In particular, in a thrust direction S is thus an increased rigidity, including the lid 12 , given. The actual lid 12 can be formed for example by a metal sheet or a fiber composite sheet. This is reinforced in particular by the position of the vault structure. Between lid 12 and batteries 2 is an electrical line system 19 arranged. This electrical line system 19 is preferred by a contact pressure between the lid 12 and battery 2 clamped so that the electrically conductive contacts on the poles of the batteries 2 issue.

3 shows a longitudinal sectional view according to the section line III-III 1 also in installation situation within the electric motor vehicle. The individual dividers 6 as well as the outside surrounding frame 4 , formed from the hollow sections 5 , are easily recognizable, as well as the lid 12 with the outer layer 14 with the vault structure. In the vehicle vertical direction Z in installation position above the floor 8th are cooling pipes 15 available. There is a heat conduction over the battery bottom 11 to the ground 8th and finally a heat dissipation via the cooling lines 15 , For this purpose, there is also an underfloor area 16 a motor vehicle body indicated, in which the battery carrier 1 is arranged. The underfloor area 16 is at the height of the vehicle wheels 17 , the cooling pipes 15 are then located between an interior 18 of the motor vehicle and the battery carrier 1 , A warming of the interior 18 can through the cooling lines 15 above the ground 8th be avoided.

4 shows the battery carrier 1 in a perspective view. The battery carrier 1 is shown for this purpose in the installed position in the electric motor vehicle. The surrounding frame 4 is through the hollow sections 5 educated. These are coupled with the ground 8th , In installation position is above the ground 8th a system of cooling pipes 15 arranged. Optional on or in the ground 8th can latent heat storage 41 be arranged. These are in particular flat.

5 shows a plan view of the tub 3 of the battery carrier 1 from above. Used is a battery 2 between the dividers 6 , which as crossbars 19 and a longitudinal ridge 20 are formed, resulting in each case a receiving space 21 each for receiving a battery 2 , The crossbars 19 and longitudinal webs 20 are in particular with the frame 4 in the tub 3 coupled, because the ground 8th itself has a subordinate supporting function. Preferably, they are with an inner wall 22 coupled, in the simplest embodiment variant, these may be thermally joined. However, it is also conceivable that the inner wall 22 even at an angle, for example towards the ground 8th tapered inward, runs. The dividers 6 can then be arranged as a wedge assembly and here in particular via a frictional connection in the frame 4 be attached. In addition, locking lugs or spring bars are then formed, so that in particular to the wedge-shaped mounting by means of adhesion a form fit is added. During assembly, then the dividers 6 in the tub 3 be plugged. This is shown in 13 , The inner wall 22 is larger at an angle α 90 Degree inclined to the ground. Further preferred may already be the hollow profile 5 in this form with to the outside wall 30 inclined inner wall 22 be extruded.

Furthermore, it can be seen that at least one transverse web 19 and at least one longitudinal ridge 20 cross. Out 2 and 3 It can be seen that a height H19 of the transverse webs 19 and a height H20 of the longitudinal bar 20 essentially a height H13 of the interior 13 of the battery carrier 1 equivalent. These are the transverse webs 19 and the longitudinal ridge 20 provided with recesses, so that after the Principle of a tongue and groove connector system can be inserted into one another like a cross.

6 and 7 show a respective plan view of a frame 4 , The frame 4 is integrally formed circumferentially and configured rectangular. In his corners 23 he is made by turning. On a short side of the rectangle gem. 6 two end faces 24 butting to the plant and can be coupled by cohesive bonding. Also can be in a corner 23 such a system can be formed.

7 alternatively shows an embodiment variant in which the frame 4 by two in plan view U-shaped frame parts 25 is trained. These come on faces 24 to the plant and can be coupled together here by material joining.

For the production of the frame 4 will continue according to 8th a cross-sectionally L-shaped hollow profile 5 produced. A shorter jetty 26 points in installation position to the outside. The longer jetty 27 the L-shape forms the outside surrounding frame 4 and the inner wall 22 as well as outer wall 30 out. The hollow profile 5 has a bottom coupled thereto 8th on. The floor 8th has a wall thickness W8, which is preferably smaller 3 mm, in particular less than 1.5 mm is formed. The floor 8th is made in particular of light metal. At the shorter jetty 26 can the manufactured battery carrier 1 be coupled for example via screws on a motor vehicle. Also, a better rigidity of the frame is thereby formed, in particular in the thrust direction S gem. 3 realized.

For the production of the hollow profile 5 initially an endless strand is provided. This is on an inner side, thus on the inner wall to be formed 22 , with a 90 degree cutout 28 and on an outside with a separating slot 29 Mistake. This is shown in 9 ,

According to 10 then becomes the hollow profile 5 90 degrees to form a corner 23 of the frame 4 bent. An outer circumferential outer wall 30 of the frame 4 thus has no separation point and is in particular formed fluid-tight. Adjacent end faces, for example via a thermal joint seam 31 be coupled together materially.

11 shows a detailed view of the dividers 6 , There is a crosspiece for this purpose 19 with its front side abutting the longitudinal web 20 at. The longitudinal bar 20 and crossbar 19 can also be placed crosswise in one another. On a sidewall 35 of the longitudinal bar 20 is a first flange 32 bent in the vertical direction V upwards bent. A second flange 33 is from a sidewall 35 to the side of the crossbar 19 bent. The two flanges 32 and 33 are each via a thermal joint seam 31 coupled together. A recording 34 is for example provided with a rivet nut or a weld nut. Thus, according to 12 a screw 10 the battery 2 go through and into the recording 34 be coupled. The battery 2 can thus in the respective recording room 21 to be ordered. Between the upper flange 31 and the battery 2 is a free space 36 remaining, leaving the battery bottom 11 with a surface pressure against the ground 8th can be pressed by screwing. It thus finds an optimal heat conduction of battery 2 to the ground 8th instead of. The battery 2 hangs in the installation position of the battery carrier 1 in the electric motor vehicle thus referred to the motor vehicle vertical direction Z with their electrical poles P pointing down in the tub 3 ,

13 shows the tub 3 of the battery carrier according to the invention in cross-sectional view. The frame 4 is formed of a hollow profile. An interior wall 22 of the frame 4 is at an angle α greater than 90 degrees to the ground 8th arranged. Preferably, the angle α is between 90 degrees and 100 degrees. Due to the angular arrangement of the inner wall 22 For example, the partitions may be in the vertical direction V from above into the trough 3 be used form-fitting and in particular wedged. These dividers can then, for example, with a locking connection, not shown, an adhesive bond, a welded joint or even a screw in the tub 3 be fixed in position.

As per 14 and 15 , is the ground 8th not only single-layered but double-layered. This has for this purpose a first bottom layer 37 on that together with the encircling frame 4 from the hollow profiles 5 the tub 3 formed. Every battery 2 is with her battery bottom 11 at the first floor location 37 attached attached. Now is a second bottom layer 38 arranged. Between first floor situation 37 and the second bottom layer 38 is a cooling system 42 educated. For this purpose, in this example between the first floor layer 37 and second floor location 38 cooling channels 45 formed in the form of a respective flow 39 and rewind 40 , Furthermore, a latent heat storage 41 arranged. A not-shown cooling medium thus flows through the flow 39 over the first floor situation 37 , this is a heat quantity Q. from the battery bottom 11 over the first floor layers 37 transmitted by heat conduction and then removed by the cooling medium, not shown.

At the same time, the one between the bottom layers 37 . 38 and also between the cooling channels 45 each at the lead 39 and return 40 arranged latent heat storage 41 also tempered. In case of shutdown or failure of the active cooling system 42 can additionally heat amount Q. _{L of} the battery 2 in the latent heat storage 41 be dissipated. In the case of a cold start, conversely, a correspondingly stored heat quantity of the latent heat accumulator would occur 41 for a pre-conditioning of the battery 2 to care.

The second or outer bottom layer 38 is towards an underfloor area 16 a motor vehicle oriented arranged. An accidental touchdown or touching an obstacle or an object on a road surface 43 would mean at most a deformation of the lid, but no damage to the above the battery support arranged cooling system 42 ,

The second floor situation 38 is designed as a profiled sheet or honeycomb or Riffelblech, so that in positive and preferably fluid-tight coupling with the first bottom layer 37 the cooling channels 45 are formed. It is also conceivable that the first floor situation 37 has a three-dimensional profiling. Alternatively, it is conceivable that a third party in 16 shown in detail bottom layer 44 between first floor position 37 and second floor location 38 is arranged. This would then be the first bottom layer 37 the actual bottom of the tub 3 form. This is shown in 16 , Shown here is a third floor location 44 , The third bottom layer is between the first and second bottom layers 37 . 38 incorporated. The cooling channels 45 are then between the second bottom layer 38 and third floor location 44 educated. The individual floor layers 37 . 38 . 44 can be joined together by screwing and / or gluing and / or welding or soldering.

17 shows an example of a cooling system 42 in plan view. The cooling medium flows serially through the cooling channels. Also conceivable would be a parallel connection of the cooling channels 45 ,

LIST OF REFERENCE NUMBERS

1

battery carrier

2

battery

3

tub

4

frame

5

hollow profile

6

divider

7

central longitudinal axis

8th

ground

9

opening

10

 screw

11

 battery Tray

12

 cover

13

Interior too 1

14

 location

15

 cooling line

16

 Underfloor

17

 wheel

18

Interior too 1

19

 crosspiece

20

 longitudinal web

21

 accommodation space

22

 inner wall

23

 corner

24

 front

25

 frame part

26

 shorter bridge of the L-shape

27

 longer bridge of the L-shape

28

 Characterization / milling

29

 separating slot

30

 outer wall

31

 joint seam

32

Flange too 20

33

Flange too 19

34

 admission

35

 Side wall

36

 free space

37

 first floor situation

38

 second floor location

39

 leader

40

 returns

41

 Latent heat storage

42

 cooling system

43

 road surface

44

 third floor location

45

 cooling channel

G

Gravity

Z

Automotive vertical direction

S

thrust direction

U

Surroundings

H19

Height v. 19

H20

Height v. 20

H13

Height v. 13

W8

Wall thickness too 8th

V

vertical direction

α

 angle

Q.

 heat

P

 electric pole

Claims (12)

Battery carrier ( 1 ) for an electric motor vehicle, which in an underfloor area ( 16 ) of an electric motor vehicle is mounted, wherein the battery carrier ( 1 ) a tub ( 3 ) with an opening ( 9 ), wherein the opening ( 9 ) from a lid ( 12 ) is closed, characterized in that the tub ( 3 ) in the installed position in the electric motor vehicle with its opening ( 9 ) is arranged pointing downward in the vehicle vertical direction (Z) and that at least one battery ( 2 ) in the tub ( 3 ) by coupling with a ground ( 8th ) of the tub ( 3 ) or on in the tub ( 3 ) arranged mounting supports, in the installed position of the battery carrier ( 1 ) arranged is that the battery ( 2 ) is mounted with their electric poles (P) hanging downwards pointing. Battery carrier ( 1 ) according to claim 1, characterized in that the tub ( 3 ) a floor ( 8th ) and an outer peripheral frame ( 4 ) and / or that a cooling system ( 42 ) with the ground ( 8th ) or in the ground ( 8th ), the cooling system ( 42 ) in the installed position above the battery carrier ( 1 ) between battery carrier ( 1 ) and motor vehicle body is arranged. Battery carrier ( 1 ) according to claim 1 or 2, characterized in that the trough ( 3 ) and / or the lid ( 12 ) are at least partially formed of a metallic material. Battery carrier ( 1 ) according to one of claims 1 to 3, characterized in that the mounting support as a crossbar ( 19 ) and / or longitudinal web ( 20 ) are formed. Battery carrier ( 1 ) according to one of claims 1 to 4, characterized in that at least one battery ( 2 ) with a contact pressure to the ground ( 8th ) of the tub ( 3 ) is mounted. Battery carrier ( 1 ) according to one of claims 1 to 5, characterized in that on the lid ( 12 ) a location ( 14 ) is arranged with a vault structure and / or honeycomb structure. Battery carrier ( 1 ) according to claim 6, characterized in that the position ( 14 ) is formed of a metallic material or that the position ( 14 ) made of glass fiber reinforced material is formed. Battery carrier ( 1 ) according to one of claims 2 to 7, characterized in that the bottom ( 8th ) of the tub ( 3 ) is formed as a double bottom, wherein the cooling system ( 42 ) is arranged in the double bottom and / or that the two double bottom layers are electrically conductively bonded to each other. Battery carrier ( 1 ) according to one of claims 1 to 8, characterized in that between at least one battery ( 2 ) and the lid ( 12 ) an electrical line system ( 19 ) is arranged. Battery carrier ( 1 ) according to claim 9, characterized in that on the line system ( 19 ) Are formed contacts, such that when the lid is closed ( 12 ) the contacts on the poles of at least one battery ( 2 ) and electrically connect them with each other and with electrical connection cables. Battery carrier ( 1 ) according to claim 10, characterized in that the contacts are designed as spring contacts and / or that the contacts with electrical poles (P) of the battery ( 2 ) are coupled non-positively and / or positively and / or materially electrically conductive. Method for assembling and mounting a battery carrier ( 1 ) in a motor vehicle with the features of claim 1, characterized by the following steps: - providing the tub ( 3 ), aligned with its opening ( 9 ) upwards, - insertion and mechanical coupling of at least one battery ( 2 ) in the tub ( 3 ), - closing the tub ( 3 ) with a lid ( 12 ) and turning the battery carrier ( 1 ) by 180 degrees, leaving the opening of the tub ( 3 ) with the lid ( 12 ) is directed downwards and each battery ( 1 ) in the tub ( 3 ) and - mounting the battery carrier ( 1 ) under the motor vehicle.

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