DE102016115611B3 - Battery carrier with a frame made of hollow profiles - Google Patents

Abstract

The invention relates to a battery carrier (1) for an electric motor vehicle, which is arranged in an underfloor region of an electric motor vehicle, wherein the battery carrier (1) has a trough (3) and a cover (12) and is characterized in that the trough (3 ) is formed from an outer circumferential frame (4) and to a frame (4) coupled to the bottom (8), wherein on the bottom (8) opposite side an opening (9) is formed and the opening (9) of a Cover (12) is closed and that the frame (4) consists of a hollow profile (5) is formed.

Description

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

In the prior art motor vehicles are known to spend people or loads from one place to another place. For this purpose, these motor vehicles have a motor vehicle body which, on the one hand, comprises the chassis components and, on the other hand, at least one drive unit. 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 motive power. 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 receives its electrical energy from batteries or itself in turn via an electricity generator of an internal combustion engine.

In particular, in the batteries, progress has been made with the ion technique which, by decreasing the internal resistance, makes it possible to charge the cells connected in series or in parallel to the battery in a shorter time than cells bound with gel or tide, as well as more charging cycles low power loss and thus longer battery life. Batteries are also referred to as energy storage or accumulator, in short form as a battery, or as a traction battery. While lead or steel lithium-ion batteries were used in the past, nickel-metal hydride or lithium-ion batteries, in particular lithium-iron-phosphate batteries, are currently used in electrically driven vehicles. Such a vehicle is referred to below as an electric motor vehicle.

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 amount of batteries required for the drive, 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 protect against damage and to protect against environmental influences, the batteries are housed in a battery carrier. Such a battery carrier is also referred to as a battery tray. Such a battery carrier is, for example, from the WO 2011 061 571 A1 known.

A generic battery carrier is from the DE 10 2015 101 096 A1 known. This battery carrier is mounted in an underfloor region of an electric vehicle and has an externally formed on the hollow profile frame, wherein the hollow profile is formed in cross-section L-shaped.

Other battery carriers are from the US 2011/0143179 A1 , of the US 2012/0164500 A1 as well as the DE 10 2012 100 977 B3 known.

Object of the present invention is to provide a battery carrier for an electric motor vehicle, which is easy and inexpensive to produce and has a high rigidity.

The aforementioned object is achieved in a battery carrier for an electric motor vehicle having the features in claim 1. Advantageous embodiments are described in the dependent claims.

The battery carrier is designed for an electric motor vehicle and is mounted in an underfloor area of the electric motor vehicle. The battery carrier has a trough for receiving at least one battery, preferably a plurality of batteries and a lid. The trough is formed from an outer peripheral frame and a bottom in particular fluid-tight coupled to the frame. On the opposite side of the floor, an opening is formed and the opening is closed by a lid. The frame is inventively formed from a cross-sectionally L-shaped or T-shaped hollow profile.

The hollow profile is preferably a multi-chamber hollow profile. The longer leg of the L forms in particular the outer circumferential side wall of the tub. The shorter leg of the L is formed projecting over the frame or the outer wall to the outside. With a T-shaped configuration, a T-leg protrudes outwards. Preferably, the outwardly standing part in the form of the T-leg or L-leg consists of at least one hollow chamber.

The outwardly projecting part serves as a mounting surface for mounting the battery carrier under the electric motor vehicle, in particular at its sills. Thus, the outward Standing part of the hollow profile of the energy absorption in the event of a crash, increasing the rigidity and the connection to a sill.

The hollow profile itself is preferably formed as extruded hollow profile, in particular made of a light metal alloy, or as a rolled hollow profile, Abkantbauteil or mold component here preferably made of a steel alloy.

By constructing the battery carrier with an outer peripheral frame, a high rigidity can be provided, but at the same time a favorable and easy producibility is given, since the hollow profile can first be produced as a continuous material. A battery carrier constructed in accordance with the invention can be structurally simply adapted to the respective intended use or the application variable, thus the provided receiving volume for accommodating batteries.

For this purpose, the frame is particularly preferably configured rectangular in plan view, wherein the frame is made in one piece from a hollow profile or two in plan view U-shaped configured frame parts.

For this purpose, the hollow profile is provided with a length which substantially corresponds to the circumferential length of the outer wall of the tub to be produced. On an inner side of the tub, the hollow profile is recessed angularly, which corresponds in particular to a recess as a 90 degree section. On an outside, a separating slot is introduced into the hollow profile. The recess and the separating slot are made at a trainee corner of the hollow profile or the frame. In the corners to be produced, the hollow profile is now bent by 90 degrees, so that the corner of the tub is formed. At the coming to the plant end faces in the corners, the hollow profile is thermally joined together. As a result, the tightness of an interior space on the tub can preferably be produced.

Furthermore, an outer circumferential wall of the peripheral frame is formed continuously in the corners, wherein in a corner, the end sides are abutting and coupled to each other cohesively coupled, in particular are coupled fluid-tight or abutting the end faces abutting one another and thermally joined at a side edge of the rectangle , On the peripheral wall thus no joints and no separation, except for a thermal joint seam, given.

The bottom itself is preferably formed as a thin-walled, flat bottom, in particular as a metal floor. The bottom may be formed in particular with a thickness of less than 1.5 mm and is preferably formed of the same material as it is the frame. The floor may be formed in particular of light metal. However, the floor can also be formed of fiber composite material. The bottom is coupled to the frame, in particular coupled fluid-tight.

Now at least one battery, in particular more than 2 batteries, preferably more than 4, most preferably more than 10, in the battery carrier, in particular in the tub of the battery carrier, can be arranged fixed in position separately from each other, are still in the frame dividers in shape arranged by at least one transverse web and at least one longitudinal web. The transverse web and the longitudinal web are preferably also made of a hollow profile. The batteries are then further preferably coupled to the transverse web or to the longitudinal web, in particular joined by screws. The transverse web and the longitudinal web are in particular arranged at a respective 90 degree angle to an outer wall of the outer peripheral frame. Between the transverse web and the longitudinal web thus receiving spaces for the batteries are formed. At least one battery can then be inserted into the receiving spaces and fastened by screws, wherein in particular a battery bottom is in surface contact with the bottom of the trough and, in particular, lies flat against a bias. On the touched by the battery bottom side of the tub bottom, a cooling system is arranged. The heat emitted by at least one battery is thus discharged via heat conduction to the ground and from the bottom to the cooling system. The heat is then removed from the cooling system. The cooling system can also be integrated in the floor in such a way that a double-layered floor or a floor of several layers is designed as a "sandwich construction". Also, latent heat storage can be arranged on or in the ground. If the cooling system fails, they can still absorb the heat of the battery for a certain time and thereby cool it. During a starting process, the latent heat accumulators may have already preheated the batteries.

Further preferably, the battery carrier can be used such that first the frame is provided and coupled to the ground, so that the trough is formed. The coupling can take place cohesively and / or positively. In the tub then the transverse webs and the longitudinal webs are used. First, the dividers can be coupled together, then the frame are placed and then the floor are coupled to the frame and the dividers. The tub has with its opening the vertical direction pointing upwards. At least one battery can thus be inserted into the formed receiving spaces and secured in the tub by screws. The tub can then be closed with the lid. For this purpose, in particular the lid is coupled to the frame, most preferably coupled fluid-tight, which also takes place positively and / or cohesively. Also, the lid can be coupled to the separating webs, preferably cohesively and / or positively, for example by screwing.

Thereafter, the battery tray is rotated about 180 degrees so that the opening of the tray is oriented downwardly in the vertical direction. The bottom of the tub is thus arranged in the vertical direction at the top. On the ground, a cooling system can be arranged. The battery carrier can be installed in this position in the electric motor vehicle. The battery is thus arranged suspended in the battery carrier. The cooling system is located in the vertical direction above the battery and thus between the battery carrier and an interior of the electric motor vehicle. This mounting position in the electric motor vehicle increases the heat dissipation of each battery by natural convection. Further, it reduces or eliminates heat loss from each battery to the interior of the electric motor vehicle. In addition, the cooling system is farther away than the lid or frame edge from the road surface. An accidental placement of the electric motor vehicle on an obstacle or touching an object and thus damage to the cooling system is thus avoided. Furthermore, the first loading the battery carrier with at least one battery is clearly simple and safe by hand as well as machines executable.

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;

18 the circumferential hollow profile in cross-sectional view;

19 alternative embodiment variant of the frame-forming hollow profile in cross-sectional view;

20 an alternative embodiment variant of a longitudinal web or transverse web in cross-sectional view,

21a and b a coupling of frame and divider,

22a and b an alternative embodiment 22a and b,

23a and b an alternative embodiment 22a and b and

24a and b an alternative embodiment 22a and b.

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 lies every battery 2 on the ground 8th on and can by coupling with the ground 8th be held, for example by screws, but also alternatively or additionally by a clamping or snap fixing. Preferably, each battery 2 with the ground 8th coupled with the formation of a preload force, so that the batteries 2 flat on the ground 8th is applied.

When the assembly is complete, the battery carrier becomes 1 , as in 2 shown to 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 battery 2 can do this, 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 stands in such a way with the adjoining 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 the at least one battery 2 is arranged, is isolated from the environment U. The lid 12 is flat. 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 battery 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. It results in each case a recording room 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 inclined at an angle α greater than 90 degrees 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, in 5 recognizable that at least one crosspiece 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 they can be inserted crosswise into each other according to the principle of a tongue and groove connector system.

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 less than 3 mm, in particular less than 1.5 mm. 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 close to the outer wall 30 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. The outer wall is preferred 30 bent with a radius R, which is less than or equal to 3 times the wall thickness W30 of the outer wall, in particular less than or equal to 2 times the wall thickness W30 of the outer wall 30 is.

11 shows a detailed view of the dividers 6 with integrated recording 30 , There is a crosspiece for this purpose 19 with its front side abutting the longitudinal web 20 at. 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 the dividers 6 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 installed position in the electric motor vehicle of the battery carrier 1 thus referred to the motor vehicle vertical direction Z with their electrical poles P facing down in the battery carrier.

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. A inner 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. But it is also possible that the dividers 6 in the connection area to the inner wall 22 of the frame 4 among themselves in grooves 51 used and so fixed in a horizontal position, as in 11 shown. For this, the inner wall 22 of the hollow profile 5 or of the frame part 25 be located locally and a frontal recording for the dividers 6 form.

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 the first bottom layer 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 quantity of heat 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 an amount of heat _{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 ,

18 shows the circumferential hollow profile 5 in cross-sectional view. This is T-shaped. An outward leg or bridge 46 the T-shape is used for stiffening, for absorbing crash energy in an accident and for mounting on a sill, not shown. The jetty 46 stands over the outer wall 30 outward over. The floor 8th is with the hollow profile 5 coupled, in particular fluid-tight. The inner wall 22 and outer wall 30 of the hollow profile 5 form the inner wall 22 and outer wall 30 of the tub to be made 3 , Between them are arranged several hollow chambers 49 so the partitions 47 between the hollow chambers 49 of the hollow profile 5 stiffen.

19 shows an alternative embodiment variant which is also configured T-shaped. An outward shorter bridge 26 The L-shape also offers the possibility of stiffening the tub, the recording of crash energy and the coupling with a sill of a motor vehicle, not shown. Complementary here is on the inner wall 22 another hollow chamber 50 educated. These can be as shots 34 be designed for mounting of batteries not shown.

20 shows an alternative embodiment variant of a transverse web or longitudinal web shown here 20 in cross-sectional view. This is also configured T-shaped. The T-bar of the longitudinal bar 20 lies on the ground 8th on. The laterally projecting legs can then as recordings 34 be formed on which not shown batteries are coupled. Also, the crossbars 19 be formed in this cross-sectional configuration.

21a and b show another coupling possibility. A front page 51 of the divider 6 is at an angle β less than 90 ° to the ground 8th beveled. The angle β is complementary to the angle α with which the inner wall 22 of the surrounding frame 4 along a length section 52 locally impressed. This creates a recess 53 , This corresponds essentially to the width 54 of the divider 6 , The divider 6 can then form fit into the recess 53 be used. The remaining part of the inner wall 22 is substantially perpendicular to the ground 8th ,

22a and b show an analogous embodiment variant. Here, however, is the inner wall 22 locally over the length section 52 away. Also here is the front page 51 of the divider 6 interlock positively. The cut-out part runs at an angle α to the ground.

23a and b show an alternative embodiment variant. Here, the inner wall runs 22 at an angle α less than 90 ° to the ground 8th , The dividers 6 Thus, before mounting the floor 8th with the frame 4 coupled. For example, a screw connection or a cohesive joining can take place. Following this, the floor becomes 8th with the hollow profile 5 coupled.

24a and b show an embodiment variant according to which the hollow profile 5 with an inner wall 22 is made at an angle α greater than 90 ° to the ground 8th runs. The front side 51 of the divider 6 is beveled to complementarily at an angle β less than 90 °. In the assembled state come the front page 51 of the divider 6 and the inner wall 22 of the hollow profile form fit to the plant. These may additionally be cohesively or non-positively fixed and, for example, positively fixed by screwing or the like with each other.

The 21a . 22a . 23a and 24a each show a plan view, the 21b . 22b . 23b . 24b each show an associated sectional view along the section line AA.

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

46

 web

47

 partition wall

49

 hollow

50

 hollow

51

 front

52

 longitudinal section

53

 recess

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

W 30

Wall thickness

V

vertical direction

 R

radius

α

 angle

Q.

 heat

P

electric pole

Claims (13)

Battery carrier ( 1 ) for an electric motor vehicle, which is mounted in an underfloor area of an electric motor vehicle, wherein the battery carrier ( 1 ) a tub ( 3 ) and a lid ( 12 ), wherein the tub ( 3 ) from an outer peripheral frame ( 4 ) and one with the frame ( 4 ) coupled ground ( 8th ) is formed, wherein on the ground ( 8th ) opposite side an opening ( 9 ) is formed and the opening ( 9 ) from a lid ( 12 ) is closed and that the frame ( 4 ) from a hollow profile ( 5 ), wherein the hollow profile ( 5 ) is formed in cross-section L-shaped or T-shaped, wherein a leg of the L-shape or T-shape is oriented outwardly projecting, characterized in that for the production of the frame ( 4 ) the hollow profile ( 5 ) on an inner side of the tub ( 3 ) is recessed and on a outside a separating slot ( 29 ) has such that in the corners ( 23 ) of the produced tub ( 3 ) the hollow profile ( 5 ) is bent by 90 degrees to form the surrounding frame ( 4 ) and / or an outer wall ( 30 ) of the outer peripheral frame ( 4 ) in four corners ( 23 ) is formed continuously and on a longitudinal side or transverse side of the frame ( 4 ) two end faces ( 24 ) come into positive contact with each other and are thermally joined together. Battery carrier (1) according to claim 1, characterized in that the hollow profile ( 5 ) is formed in cross section as a multi-chamber hollow profile. Battery carrier (1) according to claim 1 or 2, characterized in that the hollow profile ( 5 ) is formed as an extruded hollow profile, or that the hollow profile ( 5 ) is formed as a sheet metal bent part,. Battery carrier (1) according to one of claims 1 to 3, characterized in that the frame ( 4 ) is rectangular in plan view, wherein the frame ( 4 ) in one piece from a hollow profile ( 5 ) or from two in U-shaped top view configured frame parts ( 25 ) is made. Battery carrier (1) according to one of claims 1 to 4, characterized in that the hollow profile ( 5 ) on the end faces ( 24 ) is thermally joined together. Battery carrier (1) according to one of claims 1 to 5, characterized in that a radius (R) of the outer wall ( 30 ) smaller than 3 times the wall thickness (W30) of the outer wall ( 30 ) is trained. Battery carrier (1) according to one of claims 1 to 6, characterized in that in the frame ( 4 ) at least one crosspiece ( 19 ) and at least one longitudinal web ( 20 ) are arranged. Battery carrier (1) according to claim 7, characterized in that between at least one transverse web ( 19 ) and at least one longitudinal web ( 20 ) Recording rooms ( 21 ) for the at least one battery ( 2 ) are arranged. Battery carrier (1) according to one of claims 1 to 8, characterized in that at least one battery ( 2 ) with the frame ( 4 ) and / or with a crosspiece ( 19 ) and / or with a longitudinal web ( 20 ) is joined by screws. Battery carrier (1) according to one of claims 1 to 9, characterized in that the cover ( 12 ) with the frame ( 4 ) is coupled fluid-tight. A battery carrier (1) according to any one of claims 1 to 10, characterized in that on the from a bottom of the battery ( 2 ) touched side of the soil ( 8th ) of the tub ( 3 ) a cooling system ( 42 ) and / or that the cooling system ( 42 ) in the ground ( 8th ) of the tub ( 3 ) is integrated. Battery carrier (1) according to one of claims 1 to 11, characterized in that the frame ( 4 ) an inner wall facing the batteries ( 22 ), and that the inner wall ( 22 ) of the trough at an angle (α) greater than 90 ° to the ground ( 8th ) and that the partitions ( 6 ) have an opposing angle (α) of less than 90 °, or that the angle (α) is less than 90 ° to the bottom ( 8th ) and that the partitions ( 6 ) have an opposing angle (α) greater than 90 ° at the front side, such that when the tub is assembled ( 3 ) the front side of the dividers ( 6 ) on the inner wall ( 22 ) of the frame ( 4 ) lie positively. Battery carrier (1) according to one of claims 1 to 11, characterized in that the frame ( 4 ) an inner wall facing the batteries ( 22 ), and the inner wall ( 22 ) to the separating webs ( 6 ) directed recesses ( 51 ), in which the partitions ( 6 ) interlock positively.

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