DE102017100612A1 - Battery carrier with spacer sleeve - Google Patents

Abstract

The invention relates to a battery carrier 1 for placement on an electric motor vehicle, wherein the battery carrier 1 is suitable for receiving at least one battery and a trough 3 having a bottom 2 and a trough 3 occlusive lid 4, wherein between cover 4 and bottom 2 at least one arranged by a bolt 7 spaced sleeve 8 is arranged, which is characterized in that the spacer sleeve 8 is materially coupled to the bottom 2 and / or that between the spacer sleeve 8 and bottom 2 and / or between bolt 7 and bottom 2, a seal 16 is incorporated ,

Description

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

Electric motor vehicles are known from the prior art. In this case, necessary for driving electrical energy is stored in batteries. These batteries are also called accumulators or traction batteries. In order to achieve an acceptable range of up to several hundred kilometers, often a variety of batteries is necessary, which have a total of a large volume and weight.

For this purpose, it is known from the prior art to arrange these batteries in the underfloor area of a motor vehicle. The batteries themselves must also be protected against external weather conditions. Furthermore, leakage of vapors or liquids from the batteries should be compensated so that they do not end up in the environment.

For this purpose, battery carriers are also known from the prior art, also called battery tray or battery tray. These battery carriers usually have a trough, in which the batteries are arranged, and a cover closing the tub. Such a battery carrier sometimes has an areal extent of up to several square meters, for example more than 2 m ² , in particular more than 3 m ³ area. Accordingly, the bottom of the tub, but also the lid sag or swing while driving. Therefore, the bottom and lid are constantly spaced from each other. For this purpose, spacers which are arranged in the battery carrier for this purpose are known from the state of the art, with a threaded bolt passing through the spacer sleeve being arranged in the latter. By means of the bolts, the battery carrier is usually screwed at the same time also at the bottom of the vehicle body. Thus, the entire weight of the battery carrier is distributed to the body at several Durchschraubpunkten. Furthermore, there is a stiff connection.

Object of the present invention is to simplify a known from the prior art battery carrier with spacers constructive, while improving the precision and the sealing effect.

The object of the invention is achieved with a battery carrier according to the features in claim 1.

Advantageous embodiments are the subject of the dependent claims.

The battery tray is suitable for placement on an electric motor vehicle. In particular, it is mounted in an underfloor area of an electric motor vehicle. The battery carrier is suitable for receiving at least one battery, preferably of a plurality of batteries, which may be connected in series or in parallel.

For this purpose, the battery carrier has a trough with a bottom. The tub and in particular the bottom of the tub are preferably made of a metallic material, for example steel material or light metal material.

Furthermore, the battery carrier has a lid closing the tub. The lid itself may be flat. However, the cover itself may also be formed trough-shaped. The lid may be formed of the same material of the tub. However, the lid can also be made of plastic or other materials.

Between the lid and the bottom of at least one of a threaded bolt spaced spacer sleeve is arranged. Preferably, at least two, in particular a plurality of spacer sleeves between the lid and the bottom are arranged. Optionally, a cooling system may also be present in the battery carrier.

According to the invention it is now provided that the spacer sleeve is materially coupled to the ground, in particular welded. Alternatively or additionally, the invention provides that between the spacer sleeve and the bottom and / or between the bolt and the bottom a seal is incorporated. In this case, the spacer sleeve may also be non-positively and / or positively coupled to the ground.

Due to the fact that the spacer sleeve is welded to the bottom, no further sealing action would have to be made between the spacer sleeve and the base first. Further preferred between spacer sleeve and cover also incorporated a seal. Also, a seal between the bottom and spacer sleeve can be incorporated. Moisture and / or rain or spray water located outside the battery carrier can thus not penetrate into the interior space created between trough, cover and spacer sleeve. At the same time leaking battery vapors and / or battery fluids can not escape from the interior. The manufacture and installation is easy to make, especially as the spacers are welded into the tub. The welding is preferably carried out from the outside, so that an end face or outer circumferential surface of the spacer sleeve is joined to an outer side of the bottom with a radially circumferential weld.

The spacer sleeve is for this purpose in particular in one piece and made of the same material produced by massive forming or as an extrusion component. A complex processing for the preparation of the spacer sleeve, for example as a rotating part, can thus be omitted. The spacer sleeve itself is in particular made of a steel material or a light metal material, in particular the latter case of an aluminum material. The choice of material takes place in particular depending on the material of the soil, so that a good weldability of spacer sleeve and bottom is given.

Thus, the strength of the compound produced is further increased, it is preferably provided that the spacer sleeve is radially widened end. The radial broadening can be done for example by a widening or upsetting. Preferably provided is a collar. The broadening can be formed on each end side of the spacer sleeve. However, the broadening is preferably formed at the bottom end of the spacer sleeve. However, the broadening can also be formed only on the cover-side end of the spacer sleeve.

Further preferably, a seal can be incorporated between a front end and the lid. In particular, the seal is a seal made of rubber-like material or elastomer material. Particularly preferred is an O-ring. Further preferably, a groove can be introduced at the front end, so that the seal is at least partially disposed in the groove.

For the initial installation of the battery carrier, in particular the trough, the spacer sleeve further preferably has a positioning aid. The positioning aid can be formed in a design variant by a stepped shoulder. The stepped shoulder is formed on the outer circumferential surface. Preferably, the spacer sleeve is inserted into an opening in the floor with the step shoulder until it rests on an inner side of the floor. Furthermore, the spacer sleeve can then be materially coupled to the ground with a radially circumferential weld seam.

As an alternative to the cohesive coupling, the bottom can also be positively and / or positively coupled to the spacer sleeve, in particular by incorporation of a seal. For this purpose, in particular, the bottom can be flanged in the region of an opening. The flanged edge engages around the spacer sleeve. In particular, it engages from the inside into the spacer sleeve and comes to an inner circumferential surface of the spacer sleeve form-fitting to the plant. Preferably, furthermore, the inner lateral surface of the bottom end of the spacer sleeve can have a receiving groove, wherein the flanged edge of the opening of the base in the receiving groove comes into positive engagement with the receiving groove.

In a further preferred embodiment variant, an opening or the area surrounding the opening can have a denting or embossing in the direction of an interior space of the battery carrier. Preferably, in the Einmuldung the head of the bolt is at least partially included. This prevents over the bottom strongly projecting heads of bolts after installation of the battery carrier in or under the vehicle. Furthermore, the bolt and / or a seal is calibrated.

In a further preferred embodiment variant, the spacer sleeve is coupled by means of friction welding to an inner side of the base.

A further preferred embodiment variant of the present invention provides that a slip-on sleeve is mounted positively and optionally non-positively on the spacer sleeve, in particular on a cover-side end of the spacer sleeve. The slip-on can also be called Aufpresshülse. The slip-on sleeve then abuts on an inner side of the cover and / or is coupled to the cover. Preferably, a seal is incorporated between the slip-on sleeve and the cover. Furthermore preferably, a seal can also be incorporated between the slip-on sleeve and the spacer sleeve. Furthermore, the slip-on sleeve can have a larger diameter than the spacer sleeve. Thus, the sealing surface can be increased towards the lid. Furthermore, a tolerance compensation is preferably provided between spacer sleeve and slip sleeve. For example, with increasingly strong tightening of the bolt, the slip-on sleeve can be pressed more strongly onto the spacer sleeve. Different distances between lid and bottom can thus be compensated.

Preferably, a conically tapered design of the end of the spacer sleeve facing toward the slip-on sleeve or the end of the slip-on sleeve facing the spacer sleeve permits tolerance compensation and self-centering of the sleeves and the cover to the bottom.

Furthermore, a radial tolerance compensation between the engaged spacer sleeve and the hole in the lid can be made.

• 1a und b jeweils einen erfindungsgemäßen Batterieträger in perspektivischer Ansicht und
• 2 bis 9 verschiedene Ausgestaltungsvarianten eines Batterieträgers mit Abstandshülse in Schnittansicht.

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:

• 1a and b in each case a battery carrier according to the invention in a perspective view and
• 2 to 9 various design variants of a battery carrier with spacer sleeve in a sectional 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.

1a and 1b show a battery carrier according to the invention 1 each in a perspective view, but without cover. The battery carrier 1 according to 1a is a built part. A floor 2 is with a laterally encircling frame 35 , formed of particular extruded profiles, coupled. Thus, a tub 3 educated. In the battery carrier 1 are spacer sleeve according to the invention 8th arranged so that after coupling with a lid, not shown, the peripheral frame 35 and the spacer sleeves 8th coupled with the lid. In case of 1b is the tub 3 of the battery carrier 1 designed as a deep-drawn component. Consequently, the ground 2 and the surrounding frame 35 formed in one piece and material uniform. Opposite the frame 35 is on the top again outward a flange 36 from. Again, in the battery tray 1 spacer sleeves 8th arranged so that after coupling with a lid, not shown, the flange 36 and the spacer sleeves 8th each comes with the lid to the plant.

2 shows a section of a battery carrier according to the invention 1 in sectional view. At the bottom of the picture there is a floor 2 the tub 3 of the battery carrier 1 , At the top of the picture there is a lid 4 , Between lid 4 and tub 3 is an interior 5 provided for receiving batteries not shown. So now the lid 4 and the ground 2 at a predetermined distance 6 held to each other and at the same time the battery carrier 1 can be screwed to a non-illustrated motor vehicle body, passes through a bolt 7 , Preferably pass through several, but not shown in detail screw 7 , the battery carrier 1 and attach this below or on the vehicle body K which are above the lid 4 by the reference numeral K is indicated. So that the tightening torque of the bolt 7 as it were not the ground 2 deformed, is a spacer sleeve 8th used. The spacer sleeve 8th keeps the ground 2 and the lid 4 at a predetermined distance 6 to each other. At the same time, the spacer sleeve supports 8th that from the head 9 of the bolt 7 Applied tightening torque against the lid 4 from. The bolt 7 For example, on a seat cross member or on a underbody support of the vehicle body K be attached.

Now, the invention provides that on the ground 2 , and shown here on an outside 10 of the soil 2 , a circumferential weld 11 the spacer sleeve 8th with the ground 2 coupled. As a result, a solid and dense connection is provided. Optionally additionally or alternatively, a particularly dense weld 11 with an inside 12 coupled to the bottom 2. This also connects the ground 2 with the spacer sleeve 8th ,

The spacer sleeve 8th is here formed as an elongated, cylindrical body, having an outer diameter A8 and an inner diameter I8. From inside is the spacer sleeve 8th hollow, leaving the bolt 7 this is passed through. A lid-side end 13 the spacer sleeve 8th is widened, so that a larger contact surface on the inside 14 of the lid 4 is made. At one end 15 the lid-side end 13 a groove is provided, wherein in the groove a seal 16 is arranged. The seal 16 is designed in particular as a circumferential O-ring and seals the interior 5 formed by spacer sleeve 8th and lid 4 opposite the environment U from. At a bottom end 17 is a stepped heel 18 on the outer circumferential surface 19 the spacer sleeve 8th provided, wherein the stepped shoulder 18 an opening of the floor 2 passes through and then on the inside 12 of the soil 2 positive fit. As a result, a centering when inserting the spacer sleeve 8th allows. In case of a weld 11 on the outside 10 of the soil 2 has the spacer sleeve 8th between the step heel 18 and its frontal end 13 a distance A on, a sufficient space for the weld 11 and the head 9 of the bolt 7 leaves.

3 shows an alternative embodiment variant of a spacer sleeve 8th , This is at a bottom end 17 the spacer sleeve 8th radially with a collar 20 widened. The collar 20 lies at least partially on the outside 10 of the soil 2 on and is with a circumferential weld 11 with the ground 2 welded. As a result, the supporting force in the motor vehicle vertical direction Z improved. The collar 20 in particular serves to improve the weldability, since an overlapping connection can be welded easily with aluminum. At the same time, the opening 21 in the ground 2 be formed enlarged, so that the spacer sleeve 8th the opening 21 penetrating in the radial direction R can be moved to compensate for tolerances. At a lid-side end 13 is the spacer sleeve 8th formed tapered, in particular tapered.

Furthermore, a slip-on 22 provided on the spacer sleeve 8th is plugged. The slip-on sleeve 22 has a tapered inner diameter I22 , Corresponding to the conical outer diameter in the region of the lid-side end 13 the spacer sleeve 8th , At one end 23 the slip-on sleeve 22 is again a seal 16 between inside 12 the lid 4 and front side 23 the slip-on sleeve 22 arranged, which has an interior 5 opposite the environment U seals. Furthermore, a tongue and groove connector system in the manner of a clip connection 24 between slip-on sleeve 22 and spacer sleeve 8th be educated. In addition, a step heel 18 be provided so that the slip-on 22 positively in the axial direction or motor vehicle vertical direction z with the spacer sleeve 8th is applied. Due to the conical course, initially an increasing adhesion can be provided, so that, depending on the tightening torque in the motor vehicle vertical direction Z Tolerances regarding the distance 6 between ground 2 and lid 4 be compensated.

Furthermore, just by the positioning of the spacer sleeve 8th in the opening 21 of the soil 2 a tolerance in the radial direction R to the opening 25 in the lid 4 be compensated. Here is on the image plane on the right side a larger distance of the bolt 7 to the opening 25 of the lid 4 given what by positioning the spacer sleeve 8th in the radial direction R in the opening 21 of the soil 2 can be compensated.

4 shows in a modification to 3 that the opening 21 of the soil 2 a draft 26 having. The passage 26 serves to stabilize the opening 21 and thus the edge of the opening 21 or the contact surface to the spacer sleeve 8th and bolts 7 , The passage 26 lies on the outer circumferential surface 19 the spacer sleeve 8th positively. By this measure, the spacer sleeve 8th through the ground 2 be guided and is simultaneously positioned herein and held in positive and / or non-positive position. Following this, then the weld 11 , shown here between outside 10 of the soil 2 and collar 20 of the spacer sleeve 8th be executed. It would also be conceivable that the lid-side end 13 , which in this case is conical, when inserting the spacer sleeve 8th the passage 26 in the opening 21 of the soil 2 generated.

5 shows an alternative embodiment variant. This is at a bottom end 17 the spacer sleeve 8th an extension 27 educated. This extension 27 can also be described as a centering extension. This reaches into the opening 21 in the ground 2 one. The floor 2 even has a credit 28 on with which he in motor vehicle vertical direction Z opposite the outside 10 of the soil 2 in the interior 5 is set back. The monotony 28 is that the opening 21 in the ground 2 bordering area. Between outside 10 of the soil 2 in the area of crediting 28 and the head 9 of the bolt 7 is also a seal 16 incorporated. This seal 16 can also be designed in the form of an O-ring. At a lid-side end 13 is also a groove 29 opposite the front 15 formed back and formed in the groove 29 is also a seal 16 arranged so that between spacer sleeve 8th and inside 14 of the lid 4 a seal is made.

6 shows an alternative embodiment variant. Accordingly, the spacer sleeve 8th positive fit on the inside 12 of the soil 2 coming to the plant coming. Between a front side 30 the bottom end 13 the spacer sleeve 8th and the inside 12 of the soil 2 is also a seal 16 incorporated. The inner lateral surface 31 the spacer sleeve 8th also has a receiving groove 32 on, such that a flanged edge 33 the opening 21 of the soil 2 positively in the receiving groove 32 intervenes. The spacer sleeve 8th is thus form-fitting by the flanging on the ground 2 held. At the lid-side end 13 is again a groove 29 arranged to receive a seal 16 to the spacer sleeve 8th opposite the inside 14 of the lid 4 seal.

7 showed an alternative embodiment variant. Here is a bottom end 17 the spacer sleeve 8th by friction welding, in particular rotational friction welding, with the inside 12 of the soil 2 coupled. This results in a Schweißwulst 34 which is projecting radially outwardly or in the axial direction. The weld bead 34 can be inside and / or outside in the battery carrier 1 remain or be removed if necessary. In this illustration, the lid-side end 13 formed radially widened, so that a larger support surface on the front side 15 relative to the inside 14 of the lid 4 is given, with inclusion of a seal 16 ,

In 8th and 9 two further variants are shown. Accordingly, at the opening 21 in the ground 2 one passage each 26 educated. The passage 26 from 8th is to the interior 5 directed towards. The passage 26 from 9 is directed to the outside. Each at one end of the passage 26 is a weld 11 formed radially encircling. The lid-side end 13 of the bolt 7 is each widened formed.

LIST OF REFERENCE NUMBERS

1 -

battery carrier

2 -

ground

3 -

tub

4 -

cover

5 -

inner space

6 -

distance

7 -

bolts

8th -

spacer

9 -

Head to 7

10 -

Outside to 2

11 -

Weld

12 -

Inside to 2

13 -

End to 8

14 -

Inside to 4

15 -

Front side to 13

16 -

poetry

17 -

bottom end to 8

18 -

stepped shoulder

19 -

Outer circumferential surface to 8

20 -

collar

21 -

Opening in 2

22 -

slip-on

23 -

Front side to 22

24 -

clip connection

25 -

Opening to 4

26 -

Draft

27 -

extension

28 -

Einmuldung

29 -

groove

30 -

front

31 -

Inner surface area

32 -

receiving groove

33 -

flanged edge

34 -

weld bead

35 -

frame

36 -

flange

A-

distance

Z -

Automotive vertical direction

A8 -

Outside diameter to 8

18 -

Inner diameter to 8

I22 -

Inner diameter to 22

U -

Surroundings

R -

radial direction

K -

Automotive body

Claims (14)

A battery carrier (1) for mounting on an electric motor vehicle, the battery carrier (1) being suitable for receiving at least one battery and having a trough (3) with a bottom (2) and a lid (4) closing the trough (3), wherein between the cover (4) and the bottom (2) at least one of a screw bolt (7) through-spaced sleeve (8) is arranged, characterized in that the spacer sleeve (8) to the bottom (2) is cohesively coupled and / or that between the spacer sleeve (8) and bottom (2) and / or between bolt (7) and bottom (2) a seal (16) is incorporated. Battery carrier (1) after Claim 1 , characterized in that the spacer sleeve (8) is made in one piece and of the same material, in particular as a massive forming component or as an extrusion component, preferably, the spacer sleeve (8) made of a steel material or a light metal material. Battery carrier (1) after Claim 1 or 2 , characterized in that the spacer sleeve (8) on the bottom (2) on an inner side (12) and / or an outer side (10) with a circumferential weld seam (11) is coupled. Battery carrier (1) according to one of Claims 1 to 3 , characterized in that the spacer sleeve (8) on a cover side has a widened end (13), wherein in particular frontally between widened end (13) and cover (4) a seal (16) is incorporated, preferably in a front-side groove (29 ) of the end (13). Battery carrier (1) according to one of Claims 1 to 4 , characterized in that at a bottom end (17) of the spacer sleeve (8) is formed a positioning aid, in particular, the spacer sleeve (8) has a stepped shoulder (18) which engages in an opening (21) of the bottom (2). Battery carrier (1) according to one of Claims 1 to 5 , characterized in that the spacer sleeve (8) at a bottom end (17) has a collar (20), wherein the spacer sleeve (8) with the collar (20) on an outer side (10) of the bottom (2) and circumferentially welded to the bottom (2). Battery carrier (1) according to one of Claims 1 to 6 , characterized in that on the cover side of the spacer sleeve (8) a slip-on sleeve (22) is provided, in which the spacer sleeve (8) engages, wherein the slip-on sleeve (22) on an inner side (12) of the lid (4). Battery carrier (1) after Claim 7 , characterized in that the spacer sleeve (8) and the slip-on sleeve (22) are positively coupled and optionally non-positively with each other. Battery carrier (1) according to one of Claims 7 or 8th , characterized in that the slip-on sleeve (22) rests against the inside (14) of the cover (4), preferably a seal (16) between slip-on sleeve (22) and spacer sleeve (8) is incorporated. Battery carrier (1) according to one of Claims 7 to 9 , characterized in that between Aufsteckhülse (22) and spacer sleeve (8) a tolerance compensation is provided, which compensates tolerances of the distances (6) between the cover (4) and the bottom (2). Battery carrier (1) according to one of Claims 1 to 10 , characterized in that an opening (21) of the bottom (2) through which the spacer sleeve (8) is guided, a passage (26) or a flanged edge (33). Battery carrier (1) according to one of Claims 1 to 11 , characterized in that an opening (21) of the bottom (2), through which the spacer sleeve (8) is guided, a Einmuldung (28) towards an interior (5) of the battery carrier (1), wherein preferably in the Einmuldung (28) of the head (9) of the bolt (7) is at least partially received. Battery carrier (1) according to one of Claims 1 to 12 , characterized in that a bottom end (17) of the spacer sleeve (8) is non-positively and / or positively coupled to the bottom (2), in particular by a flanging of the bottom (2), preferably a seal (16) is incorporated, in particular between an end face (13) of the spacer sleeve (8) and the bottom (2) and / or preferably has an inner circumferential surface (31) of the bottom end (17) of the spacer sleeve (8) has a receiving groove (32) for receiving a flanged edge (33) of the opening (21) of the bottom (2). Battery carrier (1) after Claim 1 , characterized in that the spacer sleeve (8) is coupled by means of friction welding with an inner side (12) of the bottom (2).

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