WO2012031617A1

WO2012031617A1 - Cable store for a charging cable of a hybrid or battery electric vehicle, and electric vehicle, in particular electric car, having such a cable store

Info

Publication number: WO2012031617A1
Application number: PCT/EP2010/063043
Authority: WO
Inventors: Frank Zappe
Original assignee: Coroplast Fritz Müller Gmbh & Co. Kg
Priority date: 2010-09-06
Filing date: 2010-09-06
Publication date: 2012-03-15

Abstract

The invention relates to a cable store (1) for an electric charging cable (2) of a hybrid or battery electric vehicle (3), comprising a rotatable drum (4), onto the circumferential surface (4a) of which the charging cable (2) can wound. In order to design the cable extraction and the cable winding to be comfortable while the cable and the cable store have a long service life, a groove-like guide profile (P) is formed on the circumferential surface (4a) of the drum (4). Said guide profile at least partially accommodates the charging cable (2) and extends around the outside of the drum (4) in the form of a helix.

Description

"Cable storage for a charging cable of a hybrid or battery electric vehicle, and electric vehicle, in particular electric car, with such a cable storage"

The present invention relates to a cable storage for a charging cable of a rechargeable battery of a hybrid or battery electric vehicle, in particular an electric car, with a rotatable drum, on the peripheral surface of the charging cable is rechargeable.

Furthermore, the invention relates to a hybrid or battery electric vehicle, in particular an electric car, with such a cable storage.

An electric vehicle and a cable storage for a charging cable of a rechargeable battery of a hybrid or battery electric vehicle, in particular an electric car, of the aforementioned type are known from DE 82 13 269 U1. The electric car described there has a built-in charger, a charging cable with power plug and serving as a departure protection safety switch on. The power plug is located at the end of the charging cable in a holder which is located in a wall of the electric vehicle and corresponds in shape exactly the outer dimensions of the power plug. On the inside of the wall is an opening through which the charging cable is led. Within the wall, an actuating lever is arranged, which activates a detachment when removing the power plug. When reinserting the power plug, the driving protection of the electric vehicle is deactivated and the driving readiness is restored. The charging cable is on the Scope of serving as a cable storage, rotatable take-up drum, which is shown schematically in a figure, but not described in detail.

The present invention has for its object to provide a cable storage of the type mentioned and a battery-powered electric vehicle, especially an electric car with such a cable storage, the cable extension and the rewind with high life of the cable and the cable memory can be realized in a comfortable manner should.

The problem underlying the invention is achieved with a cable storage of the type mentioned, in which on the peripheral surface of the drum, a groove-like guide profile is formed, which at least partially receives the charging cable and runs in the form of a helical line around the outside of the drum. The guide profile ensures according to the invention a safe unwinding and winding of the charging cable, advantageously twisting and twisting of the cable, which can lead to premature stop the winding movement and increased wear of the drum and cable insulation, effectively prevented. The guide profile acts during the winding movement as a guide and in the cable storage in the sense of fixing and securing the position of the charging cable.

The guide profile may be formed in a preferred embodiment as a thread-like groove, which runs continuously coiled outside the preferably cylindrical wall of the drum. In this case, if the cross section of the groove in shape and size, in particular circular or elliptical rounded or in

Trapezoidal shape, is adapted to the cross section of the charging cable, a very gentle, especially low-friction and therefore a low winding force requiring winding and unwinding of the cable can be achieved. The elevations extending between the grooves can also be advantageously designed in this way.

In a further preferred embodiment of the cable memory according to the invention can be provided with advantage that the length and / or the diameter of the drum and / or the slope of the helical course of the guide profile are dimensioned such that the charging cable with almost its entire length - except for a not provided for winding connection region of the cable to the plug - is einlagig on the peripheral surface of the drum wound. This, too, favors the already mentioned simple ease of winding the cable, but with additional advantage additionally that the heat generated during the charging process by the passage of current in the cable in an efficient manner and - faster in comparison with a multi-layer cable winding - can be dissipated through the drum , The strength of the magnetic field generated during current flow is comparatively smaller, since the number of turns per unit length is less than with multi-layer winding.

To prevent soiling, the drum may be disposed in a protective tube which surrounds the charging cable in its state wound on the drum. The protective tube can in this case have an analysis, in particular a longitudinal slot, for the passage of the charging cable, in whose or its edge region, for example, brush or scraper elements can be arranged, which serve to remove dirt particles from the cable.

Finally, in the invention in the winding and unwinding of the cable in the cable memory according to the invention find a special gate control application, which also contributes to solving the problem underlying the invention and will be described in more detail below.

An inventive hybrid or battery electric vehicle, in particular an electric car according to the invention, is characterized by the presence of a cable memory according to the invention.

Further advantageous embodiments of the invention are contained in the subclaims and the following specific description. Reference to an embodiment illustrated by the accompanying drawings, the invention is explained in detail. Showing:

1 is a perspective view of a cable memory according to the invention with almost completely unwound electrical charging cable, schematically implements in an inventive electric vehicle,

1 is an enlarged perspective view of a cable storage device according to the invention with almost completely wound electrical charging cable,

Fig. 3 is an exploded perspective view of an inventive

Cable storage with almost completely wound electrical charging cable,

Fig. 4 is an illustration of a cable memory according to the invention in

Cross-section along the line IV-IV in Figure 5 without the base plate shown in Figure 5 and without side part.

5 shows a partially cutaway longitudinal view, an illustration of a cable storage device according to the invention in the assembled state with an almost completely wound electric charging cable,

Fig. 6 in a Fig. 5 corresponding representation, but uncut, a

Drum of a cable storage according to the invention,

Fig. 7 in a Fig. 5 corresponding representation, but in half section, a

Protective tube of a cable storage according to the invention, Fig. 8 in a Fig. 5 corresponding representation, but in an enlarged

Half-section, a bearing cover of a cable storage according to the invention,

9 in a representation corresponding to FIG. 5, but enlarged and uncut, a sleeve part of a cable memory according to the invention, FIG.

5 in a representation corresponding to FIG. 5, but in an enlarged, longitudinally sectioned half section, a nut of a cable memory according to the invention, FIG.

1 1 in a Fig. 4 corresponding sectional view, but enlarged and rotated, a sliding block of a cable memory according to the invention,

12 in a representation corresponding to FIG. 5, but enlarged and rotated, a sliding block of a cable memory according to the invention, FIG.

FIG. 13 is a cross-sectional view corresponding to FIG. 4, but enlarged and rotated, showing a nut of a cable store according to the invention, FIG.

Fig. 14 in a comparison with FIG. 5 enlarged view and in front view, a side part of a cable storage according to the invention.

In the various figures of the drawing, the same parts are always provided with the same reference numerals, so that they are usually described only once in each case.

A cable storage 1 according to the invention, as shown in various views in FIGS. 1 to 5 as an overall component, serves for receiving and winding and unwinding an electrical charging cable 2 of a hybrid or battery according to the invention. Rie electric vehicle 3, as such in Fig. 1 is indicated. The cable storage 1 can be arranged within the body at any suitable location, in particular where usually the tank filling opening is in motor vehicles with internal combustion engines.

Fig. 1 shows the cable memory 1 with almost completely unwound electrical charging cable 2, while Fig. 2, 3 and 5 show the cable memory 1, wherein the charging cable 2 with almost its entire length - up to a not provided for winding connection region 2a of the charging cable 2 to a plug, not shown - is wound. The settlement, but in particular preferably the winding of the charging cable 2 can be done in a manner known to those skilled in the art, in particular by means of a spring mechanism, not shown, for example by means of a coil spring, or via an electric motor, whereby a rotatable drum 4 is driven on the Peripheral surface 4a, the charging cable 2 is wound up.

According to the invention - as shown in particular the single part illustration of the drum 4 in Fig. 6 - provided that on the peripheral surface 4a of the drum 4, a guide profile P is formed. The guide profile P of the drum 4 can be designed in different ways. It acts in the winding movement as a guide and in the cable storage fixing and position locking on the charging cable 2, the winding and unwinding of the charging cable 2 can be made safer than is the case with a known, not profiled and evenly curved cylindrical drum surface.

In a preferred embodiment, as illustrated by the drawing, in particular FIGS. 3 to 6, the guide profile P of the drum 4 is formed as a thread-like groove G. In this case, it is advantageous if the groove G has passages (reference symbol GG in FIG. 6) whose shape and size, in particular, as shown, are adapted to the cross-section of the charging cable 2 in the manner of a round or even trapezoidal thread. Charging cable 2 thus receives a safe during winding and storage Hold on the drum 4, without causing the risk of destruction of the cable insulation or premature wear. The individual turns of the charging cable 2 can be arranged in the individual passages GG of the groove G arranged side by side, preferably single-layered and optionally - advantageously contactless - so spaced from each other, in an orderly manner. They do not come together and do not form entanglements. Areas of the charging cable 2, which are intended to first emerge from the cable storage 1 during unwinding, are located closer to the exit point than areas which later emerge or enter during winding up.

As regards the geometric design of the drum 4, it is in the sense of a simple Wickeins the charging cable 2 and an optimal high heat transfer from the charging cable 2 to the drum 4 is advantageous if the axial length L and / or the diameter D and / or Increase of the helix of the profile P of the drum 4 are dimensioned such that the charging cable 2 with almost its entire length in one layer on the peripheral surface 4a of the drum 4 can be wound. As a result, the heat density occurring during charging is lower on the peripheral surface 4a of the drum, which is particularly important when rapid charging operations are carried out at an increased current intensity and / or voltage.

As further shown in Fig. 1 to 5, the drum 4 is preferably arranged in a protective tube 5, which surrounds the charging cable 2 in its wound state on the drum 4. The protective tube 5, which can be seen as an individual part in the exploded view of FIG. 3 and also in FIG. 7, has a longitudinal slot 5 a for carrying the charging cable 2. Depending on how far the charging cable 2 is wound up or unwound from the drum 4, the charging cable 2 passes through the longitudinal slot 5a at different points. Thus, such a passage position shown in FIG. 1 is in the vicinity of the front end side of the drum 4 in the figure, while the passage position shown in FIG. 2 at the other end, ie in the vicinity of the rear end side of the drum 4 in the figure , The protective tube 5 can advantageously be closed at both ends in each case by a bearing end cover 6 shown as an individual part in FIGS. 3 and 8 in a manner as illustrated in FIG. 5. In this case, in particular a releasable fixation of the bearing end cap 6 in the end region 5b of the protective tube 5, z. B. with a small Madensschraube be provided. The Lagerabschlussdeckel 6 can also have a stepped in its inner diameter DI passage opening 6a, each of which serves to receive a rolling bearing 7 (see FIGS. 3 and 5). The bearings 7 in turn serve a rotation gestattenden storage of axle stubs 4b, 4c of the rotatable drum. 4

Another component that the cable storage 1 according to the invention may advantageously have is an annular, displaceable along the drum 4, the drum 4 including the optionally wound charging cable 2, and in particular including the optionally existing protective tube 5, encompassing sleeve part 8. Das Sleeve part 8 can be seen in Fig. 1, 2, 4 and 5 in the assembled state and in Fig. 3 and 9 as a single part. The sleeve part 8 has an axial length LH, which is small compared to the axial length L of the drum 4, z. B. smaller than 20 percent, is and has a, in particular adapted to the cross section of the charging cable feedthrough opening 8a for the charging cable 2 on. When winding and rewinding the charging cable 2, the sleeve part 8 moves in the axial direction X-X relative to the drum 4, wherein it leads the charging cable 2 at its exit point from the cable storage according to the invention, stabilized and prevents twisting, twisting and looping of the charging cable 2.

A recoverable in this sense advantage is the use of a screw-on the drum 4 nut 9, as shown in FIG. 3, 10 and 13 in an illustration as a single part and Fig. 4 can be seen in the assembled state. As particularly illustrated in FIG. 10, the threads GM of the thread 9a of the nut 9 are preferably formed complementary to the groove pitches GG (FIG. 6) of the drum 4, and the respective pitch of the flights of the groove G and the thread 9a is chosen such that that the mother 9 by the winding or unwinding of the charging cable 2 respectively applied forces can perform their screwing movement along the axis of the drum 4 smoothly.

By means of the sleeve part 8 and the nut 9 can be realized with advantage in the cable memory 1 according to the invention the aforementioned slide control. For this purpose, additionally a sliding block 10, which is shown in different views in Fig. 1, 2, 4 and 5 in the assembled state and in Fig. 3, 1 1 and 12 as a single part. By means of insertable into the sleeve part 8 and the nut 9 and used and fastened or fixed sliding block 10, the sleeve part 8 and the nut 9 rotatably and axially fixed to each other connected or connected, wherein the sleeve part 8, the nut 9 on the outside form-fitting surrounds , The sliding block 10 is guided or guided in the longitudinal slot 5a of the protective tube 5, through which the charging cable 2 is guided, wherein it is axially movable or moved by the mother 9 upon rotation of the drum 4 by forced operation. By this link control the charging cable 2 is lifted during unwinding of the drum 4 and urged through the passage opening 8a of the sleeve part 8 to the outside. When rewinding takes place a reverse movement process. The sliding block 10 moves with the nut 9 and the surrounding sleeve part 8 in the opposite axial direction, whereby the charging cable 2 is drawn into the cable storage 1 according to the invention and in the corridors GG of the trained as a groove G guide profile P of the drum 4 is inserted.

The sliding block 10 itself, which seen in cross-section in the direction of a secant S (see Fig. 3 and in particular 5 and 6) in a receiving opening 8b (see in particular Fig. 9) of the sleeve part 8 is inserted and can be recorded there and held in a form-fitting manner is, as shown in FIG. 4 - releasably connectable in particular unspecified mounting screws with the nut 9. For this purpose, the sliding block 10 preferably has stepped holes 10 a, in which the fastening screws can be sunk. For engagement in the nut 9, the sliding block 10 - as shown in particular Fig. 1 1 - seen in cross-section on a stepped contour, of a base body 10b of the sliding block 10, in which the stepped bore 10a is located and with a lower inner edge 10c in the inserted into the nut 9 state whose thread 9a tangent, a base 10d protrudes. The foot body 10d is tangent to the outer circumference of the nut 9 with a lower outer edge 10e in the state inserted in the nut 9. The nut 9 in this case has a correspondingly stepped mating contour 9b, in which - as in particular Fig. 10 shows - are also screw holes 9c for the mounting screws 1 1. With this design, the sliding block 10 can be mounted easy to install, but functionally reliable and tilt-free in the nut 9.

As already apparent from the foregoing, the invention is not limited to the described embodiment, but also includes all the same in the context of the invention embodiments. Thus, the pitch of the helical line of the guide profile P does not necessarily have to be constant over the length L of the drum 4, but may also increase or decrease as needed. Areas with larger and smaller pitch can alternate. In this case, it can be taken into account that with increasing pitch of the helix, the cable length which emerges from the cable store according to the invention or enters it during one revolution of the drum 4 also increases. The term "groove-like guide profile P" is also subsumed such profile forms in which the leadership of the charging cable 2 is not - as shown - over continuously formed massive side walls of a groove G is realized, but for this purpose of discrete, juxtaposed elements, such as Also, the peripheral surface 4a of the drum does not necessarily have to be of cylindrical basic shape, but may also have a conical, barrel-shaped or concave-domed shape without departing from the scope of the invention.

In addition, the skilled person can supplement the cable storage 1 according to the invention by further advantageous technical details. This relates, for example, to the unillustrated drive of the drum 4 and an unillustrated design of a lead-out of the charging cable 2 from the cable storage 1 according to the invention to a battery, which should in particular be centric on one of the end sides of the cable storage 1. Further expedient parts associated with the cable storage according to the invention show Fig. 5 in the assembled state and Fig. 14 in an individual view. Thus, it can advantageously be provided that the drum 4, in particular via its axially projecting stub axle 4b, 4c, in - preferably designed according to the type of support cheeks - side parts 1 1, which are preferably on or on a base plate 12, for example via screw, fixed , is rotatably mounted. Accordingly, the side parts 1 1 screw holes 1 1 a for connection to the base plate 1 1 and each have a receiving opening 1 1 b for the stub axle 4b, 4c. Furthermore, it can be provided for the passage of screws 13 therein screw holes 1 1 c, which serve the attachment of the side parts 1 1 on Lagerabschlussdeckel 6.

In an electric vehicle 3 according to the invention, which contains a cable storage 1 according to the invention, the charging cable 2, for which the cable storage 1 according to the invention is designed, can be prefabricated with known, in particular standardized, plugs, as they are mentioned below. For example, the charging cable 2 can be equipped with a charging plug for a single-phase 230 V connection and / or for a three-phase 400 V connection and designed for a charging current of up to 63 A. The charging cable 2 can also contain communication lines, such as for activating an immobilizer and / or for exchanging data.

According to a standard design for charging plugs agreed by leading European car manufacturers and utilities in early 2009, the designed charging plugs are no larger than conventional 16A plugs and are suitable for both the single-phase 230V and three-phase 400V Connection up to 63 A charging current suitable. The plugs also contain the required communication interfaces between the charging station and the vehicle. A so-called "proximity" contact provides for the activation of an immobilizer, and a "control pilof" contact allows communication for the exchange of data using these plugs, the charging of the vehicle batteries on the one hand in the home area, the electric car z B. overnight a 230 V Schuko socket can be charged, and on the other hand on time-saving charging stations with up to 63 A charging current be possible with which the charging times can be reduced to less than ten percent compared to a charge at home.

The electric vehicle 3 according to the invention may also be a road vehicle with a hybrid drive, in which various drive technologies, for example electric and combustion engine drives, are combined.

Finally, the invention is not limited to the feature combinations defined in claims 1 and 12, but may also be defined by any other combination of particular features of all the individual features disclosed overall. This means that each individual feature of claim 1 can be omitted or replaced by at least one feature disclosed elsewhere. In this respect, the claims are to be understood merely as a first formulation attempt for an invention.

LIST OF REFERENCE NUMBERS

1 cable storage

2 charging cables

2a connection area of 2

3 electric vehicle

4 drum of 1

4a peripheral surface of 4

4b, 4c stub axle of 4

5 thermowell of 1

5a longitudinal slot in 5

5b end area of 5

6 Bearing cover from 1

6a passage opening of 6 for 7 and 4b, 4c

7 rolling bearings

8 sleeve part of 1

8a passage opening of 8 for 2

8b receiving opening of 8 for 10

9 mother of 1

9a thread of 9

9b Against contour of 9 for 10

9c screw hole in 9 for 1 1

10 sliding block from 1

10a stepped bore in 10 for 1 1

10b basic body of 10

10c inner edge to 10b

10d foot of 10

10e outer edge of 10d

1 1 side panel of 1 1 1 a screw holes in 1 1 for attachment to 12

1 1 b Opening in 1 1 for 4b, 4c

1 1 c screw holes in 1 1 for 13

12 base plate of 1

13 screws for fixing 1 1 to 6

D diameter of 4

DI inner diameter of 6

G groove in 4a

GG gear by GG

GM thread of 9a

L axial length of 4

LH axial length of 8

P guide profile on 4a

S secant through 8, 9

X-X longitudinal axis of 1

Claims

claims

1 . Cable storage (1) for an electric charging cable (2) of a hybrid or battery electric vehicle (3), with a rotatable drum (4) on whose peripheral surface (4a) the charging cable (2) can be recharged,

characterized in that on the peripheral surface (4a) of the drum (4) a groove-like guide profile (P) is formed, which at least partially receives the charging cable (2) and extends in the form of a helical line around the outside of the drum (4).

2. cable memory (1) according to claim 1,

characterized in that the guide profile is formed as a thread-like groove (G) having gears (GG) whose shape and size, in particular rounded in cross-section or trapezoidal, are adapted to the cross section of the charging cable (2).

3. cable memory (1) according to claim 1 or 2,

characterized in that the axial length (L) and the diameter (D) of the drum (4) are dimensioned such that the charging cable (2) with almost its entire length in one layer on the peripheral surface (4a) of the drum (4) can be wound.

4. cable memory (1) according to one of claims 1 to 3,

characterized in that the drum (4) in a protective tube (5) is arranged, which surrounds the charging cable (2) in its wound on the drum (4) state.

5. Cable storage (1) according to claim 4,

characterized in that the protective tube (5) has a longitudinal slot (5a) for the passage of the charging cable (2).

6. cable memory (1) according to one of claims 1 to 5,

characterized by an annular, along the drum (4) displaceable, the drum (4) including the optionally wound thereon charging cable (2), and in particular including the optionally existing protective tube (5), encompassing sleeve part (8) whose axial length ( LH) is small compared to the axial length (L) of the drum (4) and which has a, in particular adapted to the cross section of the charging cable through opening (8a) for the charging cable (2).

7. cable memory (1) according to one of claims 1 to 6,

characterized by a screwed onto the drum (4) nut (9) whose threads (GM) preferably complementary to the passages (GG) of the groove (G) on the drum (4) are formed.

8. cable memory (1) according to claim 6 and 7,

characterized in that the sleeve part (8) surrounds the nut (9) on the outside form adapted and rotatably and axially fixed to the nut (9) connected or connectable.

9. cable memory (1) according to claim 5 and 8,

characterized in that the sleeve part (8) and the nut (9) via a in the sleeve part (8) and the nut (9) can be inserted or inserted and fastened or fastened therein sliding block (10) are connected or connected, wherein the sliding block (10) in the longitudinal slot (5a) of the protective tube (5) through which the charging cable (2) is guided, guided or guided is and is axially movable by the mother (9) by positive guidance or is moved.

10. Cable storage (1) according to one of claims 1 to 9,

characterized in that the drum (4) via a spring mechanism, for example by means of a coil spring, or driven or driven by an electric motor.

1 1. Cable storage (1) according to one of claims 1 to 10,

characterized in that the drum (4), in particular on axially projecting axle stub (4b, 4c), in side parts (1 1), which are preferably fastened or fastened on or on a base plate (12) is rotatably mounted.

12. hybrid or battery electric vehicle (3), in particular electric car,

characterized by a cable store (1) according to one of claims 1 to 1 1.

13. hybrid or battery electric vehicle (3) according to claim 12,

characterized in that on the cable memory (1) a charging cable (2) is wound up.

14. hybrid or battery electric vehicle (3) according to claim 13,

characterized in that the charging cable (2) is assembled with a charging plug for single-phase 230 V connection and / or three-phase 400 V connection and designed for a charging current of up to 63 A.

A hybrid or battery electric vehicle (3) according to claim 13 or 14,

characterized in that the charging cable (2) contains communication lines, such as for activating an immobilizer and / or for exchanging data.