DE102017120725A1 - HEATING DEVICE FOR AN ELECTRICAL LINE, EQUIPPED LINE ARRANGEMENT AND METHOD FOR HEATING AN ELECTRICAL LINE - Google Patents

Abstract

The invention relates to a Entwärmungsvorrichtung (2) for attachment to an electrical line (1), with a flexible or pliable, sleeve or tubular body having a between an inner wall (7) and an outer wall (8) enclosed coolant chamber (9) and a to the inner wall (7) adjacent through opening (6) for receiving the conduit (1). Furthermore, the invention relates to an electrical line arrangement (100) with such a Entwärmungsvorrichtung (2) and a method for Entwärmen an electrical line (1).

Description

Technical area

The present invention relates to a flexible or pliable cooling device for an electrical line. Furthermore, the invention also relates to an electrical line arrangement equipped therewith and to a method for the warming up of an electrical line. The invention is particularly suitable for use with a high-voltage line, as used for example in electric or plug-in hybrid vehicles.

State of the art

Electric vehicles with rechargeable electric energy storage devices, eg traction batteries, have a charging socket for wired charging for connecting a charging plug, which is connected to a power source, eg a charging station, via a high-voltage line designed for high electrical charging currents so as to recharge the energy storage devices can. The usable charging plugs and high-voltage cables are among others in the international Standard IEC 62196 or the DIN EN 62196 are specified and should therefore be able to provide rated charging currents of 250 A and more, depending on the charging mode. The rated charging currents cause heat generation at the charging plug and in particular at the high-voltage line, as a result of which they are thermally stressed. In addition, thermally stressed electrical lines are also used in other areas of a motor vehicle.

For the warming up of the high-voltage line beats eg the DE 10 2015 221 571 A1 a device in which an electrical line or its insulating jacket along its length has a cavity through which a coolant is passed. The disadvantage of this is that this special cables are necessary, which are either not yet available on the market or are too expensive due to the special design features.

The DE 20 2017 102 368 U1 discloses a similar embodiment of an electrical line, which also has the disadvantage that the insulating jacket has a cavity as the coolant space. Again, the line is so structurally elaborate and accordingly costly in the production and provision.

An even more complex structural design is in the DE 10 2015 117 508 A1 described. Therein, the electrical line has a hose directly surrounding a line conductor, in which a fluid line for a coolant is arranged in addition to the line core. Again, the entire structure is structurally complex and correspondingly expensive.

Description of the invention

The object of the invention is therefore to provide a means for cooling or warming of conventional electrical lines using structurally simplest possible means.

The object is solved by the subject matters of the independent claims. Advantageous developments of the invention are specified in the dependent claims, the description and the accompanying figures.

An inventive Entwärmungsvorrichtung for attachment to an electrical line has a flexible or limp, so not dimensionally stable, as well as tubular or tubular body. This can e.g. be molded from a coolant-resistant plastic material with possibly elastic properties. The main body has a coolant space enclosed between an inner wall and an outer wall and a passage opening adjacent to the inner wall for receiving the conduit. The line may, in particular, be a so-called high-voltage line, as e.g. between a charging socket / socket and a rechargeable energy storage of an electric or plug-in hybrid vehicle is used.

That is, the heat dissipation device is manufactured and provided separately from the pipe to be cooled. In particular, there is no one-piece uniformity between an insulation jacket of the conduit and the heat dissipation device. As a result, it is advantageously possible to cool conventional lines, as they can be purchased on the market, if necessary, by simply mounting the cooling device around the insulating jacket and then through coolant. The heat-dissipation device can then also be installed only in critical areas, such as near the charging socket. In the prior art, this would be denomination by e.g. Plug connections necessary, whereby the total resistance of the line increases by additional contact resistance.

A particularly advantageous development of the invention provides that the coolant chamber opens at its end faces into a coolant inlet nozzle and a coolant outlet nozzle. As a result, the Entwärmungsvorrichtung has a particularly small outer diameter. The Kühlmitteleinlass- or Kühlmittelauslassstutzen can simply Material extension of the inner and / or outer wall be. But it is also possible that a form-stable insert, such as a metal insert, is provided as a kind of abutment.

As an alternative to the frontal arrangement, it is also possible for the coolant space to open in the radial direction into a coolant inlet nozzle and a coolant outlet nozzle. This can facilitate the supply and removal of the coolant depending on the installation situation of the line.

In order to ensure the closest possible application of the cooling device to the insulating jacket or the outer circumference of the line and thus the greatest possible heat transfer, a diameter of the passage opening may be smaller than an outer diameter of the line.

It has surprisingly been found that the line does not always have to be cooled over its entire length. Therefore, it is often sufficient due to the cost saving and the improved assembly, when the Entwärmungsvorrichtung has a length of 50 to 500 mm, preferably from 100 to 300 mm. Thus, a longer line can be cooled in the thermally critical sections, while the Entwärmungsvorrichtung can be recessed at the uncritical sections or does not need to be installed there.

The invention also relates to an electrical line arrangement. This has an electrical line, which has an inner conductor and a surrounding insulating jacket of a, preferably cavity-free, solid material. In other words, it is a conventional isolated line. Separately to or not integrally with the insulation jacket, a Entwärmungsvorrichtung with a flexible or pliable, sleeve or tubular body is provided which has a trapped between an inner wall and an outer wall coolant space and adjacent to the inner wall passage opening in which the line is received ,

The line arrangement thus makes it possible to supplement a conventional line with an easy-to-install cooling option. In this case, along the line, a plurality of spaced apart in the longitudinal direction of the line Entwärmungsvorrichtungen be provided, for. each in thermally critical sections.

The invention can be used particularly advantageously if the electrical line arrangement is arranged between two electrical components, preferably a charging socket and a rechargeable energy store of an electric vehicle, and during the operation of the components electric current with a current of 100 A to 200 A or more, preferably of 270 A or more, flows. Due to the flexibly arrangeable cooling device, a relatively small dimensioned line can be used.

• - Bereitstellen der elektrischen Leitung. Vorzugsweise handelt es sich dabei um eine Leitung mit einem Innenleiter und einem aus einem Vollmaterial gefertigten Isolationsmantel.
• - Anbringen einer eine Durchgangsöffnung aufweisenden, flexiblen oder biegeschlaffen Entwärmungsvorrichtung auf eine Außenumfangsfläche der Leitung. In anderen Worten wird die Entwärmungsvorrichtung um den Isolationsmantel herum angebracht, so dass diese vollflächig an dem Isolationsmantel anliegen kann.
• - Strömen lassen eines Kühlmittels in einem zwischen einer Innenwandung und einer Außenwandung der Entwärmungsvorrichtung gebildeten Kühlmittelraum. Zwischen der an dem Isolationsmantel anliegenden Innenwandung und der Außenwandung ist somit ein Hohlraum gebildet, in den Kühlmittel einbringbar ist.

The invention also relates to a method for warming up an electrical line. The procedure involves the following steps:

• - Provide the electrical line. Preferably, this is a line with an inner conductor and an insulating jacket made of a solid material.
• - Attaching a passage opening having a flexible or pliable cooling device on an outer peripheral surface of the conduit. In other words, the Entwärmungsvorrichtung is mounted around the insulation jacket, so that it can lie over the entire surface of the insulation jacket.
• - flowing a coolant in a coolant space formed between an inner wall and an outer wall of the Entwärmungsvorrichtung. Between the voltage applied to the insulating jacket inner wall and the outer wall thus a cavity is formed in the coolant can be introduced.

To attach the Entwärmungsvorrichtung the line can first be threaded through the through hole of the still limp Entwärmungsvorrichtung and then the coolant can be pressurized. Thus, the Entwärmungsvorrichtung is thus initially still limp, so that the line can be relatively easily threaded through the through hole, which may have a larger diameter than the outer diameter of the line. Then, when the coolant is admitted and pressurized, the Entwärmungsvorrichtung inflates and thereby creates the entire surface of the outer circumference of the line.

But it is also possible that the through hole is provided with a diameter which is smaller than an outer diameter of the conduit. Between the Entwärmungsvorrichtung and the line then there is an interference fit or press fit, which ensures a very close concern of the inner wall on the outer circumference of the line.

In order to simplify the attachment in the interference fit, the through-opening, in particular by using a spreading tool, spread open and then threaded through the line.

list of figures

• 1 eine schematisch dargestellte, erfindungsgemäße Leitungsanordnung mit einer erfindungsgemäßen Entwärmungsvorrichtung für eine elektrische Leitung.
• 2 einen Teilabschnitt der Leitungsanordnung mit einer erfindungsgemäßen Entwärmungsvorrichtung, die an einer zu kühlenden elektrischen Leitung angebracht ist, in einer perspektivischen Ansicht.
• 3 eine perspektivische Schnittansicht eines Teilabschnitts einer Leitungsanordnung mit einer Entwärmungsvorrichtung gemäß einer ersten Ausführungsvariante und
• 4 eine perspektivische Schnittansicht eines Teilabschnitts einer Leitungsanordnung mit einer Entwärmungsvorrichtung gemäß einer weiteren Ausführungsvariante.

Hereinafter, advantageous embodiments of the invention will be explained with reference to the accompanying drawings. Show it:

• 1 a schematically illustrated, inventive conduit arrangement with a cooling device according to the invention for an electrical line.
• 2 a partial section of the line arrangement with a cooling device according to the invention, which is mounted on an electric cable to be cooled, in a perspective view.
• 3 a perspective sectional view of a portion of a line arrangement with a Entwärmungsvorrichtung according to a first embodiment and
• 4 a perspective sectional view of a portion of a conduit assembly with a Entwärmungsvorrichtung according to another embodiment.

The figures are merely schematic representations and serve only to illustrate the invention. Identical or equivalent elements are consistently provided with the same reference numerals.

Detailed description

In 1 is an electrical wiring arrangement 100 schematically illustrated, which is an electrical line 1 has, for example, in an electric vehicle, for example, a charging socket 200 with a rechargeable energy storage 300 combines. For the sake of clarity, the line represents 1 here a direct connection forth, which can be realized in practice, however, also indirectly with intermediate elements. In the charging mode of the electric vehicle can over the line 1 For example, 200 A or more flow, whereby this is thermally stressed. The administration 1 is therefore at least in sections of a Entwärmungsvorrichtung 2 Surrounded for cooling the pipe 1 provides.

2 shows the with the Entwärmungsvorrichtung 2 cooled section of the line arrangement 100 in a perspective view. It can be seen that the line to be cooled 1 an inner conductor 3 and a surrounding insulating jacket 4 made of a plastic solid material, as is known from conventional lines for high currents. At the outer circumference 5 of the insulation jacket 4 lies the tubular or sleeve-shaped Entwärmungsvorrichtung 2 on, which is made of a flexible and / or pliable plastic material and a central passage opening 6 having. In this embodiment, the inner conductor 3 a round conductor made of copper, for example, with the passage opening 6 is concentrically aligned. Accordingly, the line is 1 in the radial direction of the Entwärmungsvorrichtung 2 surround.

In 3 , which is a schematic sectional view of the conduit arrangement 100 out 2 shows, it can be seen that the cooling device 2 adjacent to the insulation jacket 4 an inner wall adjacent thereto with its outer side 7 and an outer wall spaced therefrom in the radial direction 8th having. The inner wall 7 and the outer wall 8th are connected to one another such that a fluid-tight cavity is formed between them, which serves as the coolant space 9 serves for a preferably liquid coolant.

At a first end of the Entwärmungsvorrichtung 2 is a coolant inlet nozzle 10 for introducing the coolant and at a second end face is a Kühlmittelauslassstutzen 11 formed for discharging the coolant, which, for example, by a material extension of the plastic material of the Entwärmungsvorrichtung 2 and possibly realized by a nozzle-shaped metal insert as an abutment. The respective coolant nozzle 10 . 11 is open here in the pipe longitudinal direction, so that when connecting a (not shown) coolant line, the size of the line arrangement 100 remains small in the radial direction.

4 shows a further embodiment of the Entwärmungsvorrichtung 2 compared to the embodiment described above in the arrangement of the Kühlmitteleinlassstutzens 10 and Kühlmittelauslassstutzens 11 different. Here they now extend in the radial direction and are also open in this direction.

Based on 1 to 4 Now, let's consider a possible method of warming up the electric wire 1 be explained.

First, the electrical line 1 possibly provided as a single component. Then the sleeve or tubular Entwärmungsvorrichtung 2 provided, which can be done in different ways, either with an approximately the outer diameter of the line 1 corresponding or slightly larger diameter of the passage opening 6 or with a relative to the outer diameter of the conduit 1 smaller diameter of the passage opening 6 ,

If the diameter of the through hole 6 approximately the outside diameter of the pipe 1 is equal to or even slightly larger, so in principle has a clearance fit, the line 1 by due to their Material properties non-slippery cooling device 2 or the passage opening 6 Threaded through.

However, if the diameter of the through hole 6 , preferably slightly, is smaller than the outer diameter of the conduit 1 , So in principle has an interference fit, a (not shown) spreading tool is used, for example, in the through hole 6 intervenes and spreads these. This is supported by the plastic material of the cooling device 2 has at least slightly elastic properties. In the spread state, the line 1 then through the passage opening 6 threaded through or, conversely, the Entwärmungsvorrichtung 2 on the line 1 threaded.

Then the cooling device 2 over their coolant nozzles 10 . 11 connected to a coolant circuit and filled accordingly with coolant, which is then pressurized. Due to the fluidic pressure in the coolant space 9 stiffens the previously limp Entwärmungsvorrichtung 2 and the outside of the inner wall 7 lies completely on the outer circumference 5 the line 1 at.

During operation, so in particular in the loading mode, the line arrangement 100 becomes the line due to the high current of 200 A or more 1 heat, with the heat to the coolant of the Entwärmungsvorrichtung 2 is delivered.

LIST OF REFERENCE NUMBERS

100

Electrical line arrangement

200

charging socket

300

energy storage

1

Electrical line

2

Entwärmungsvorrichtung

3

inner conductor

4

insulation jacket

5

outer periphery

6

Through opening

7

inner wall

8th

outer wall

9

Coolant space

10

Coolant inlet port

11

Kühlmittelauslassstutzen

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102015221571 A1 [0003]
• DE 202017102368 U1 [0004]
• DE 102015117508 A1 [0005]

Cited non-patent literature

• Standard IEC 62196 [0002]
• DIN EN 62196 [0002]

Claims (11)

Entwärmungsvorrichtung (2) for attachment to an electrical line (1), with a flexible or limp, tubular or tubular body having a between an inner wall (7) and an outer wall (8) enclosed coolant chamber (9) and one to the inner wall (7) has adjacent passage opening (6) for receiving the conduit (1). Entwärmungsvorrichtung (2) after Claim 1 , characterized in that the coolant space (9) opens at its end faces into a coolant inlet pipe (10) and a coolant outlet pipe (11). Entwärmungsvorrichtung (2) after Claim 1 , characterized in that the coolant space (9) in the radial direction in a coolant inlet nozzle (10) and a coolant outlet (11) opens. Entwärmungsvorrichtung (2) according to any one of the preceding claims, characterized in that a diameter of the passage opening (6) is smaller than an outer diameter of the conduit (1). Entwärmungsvorrichtung (2) according to any one of the preceding claims, characterized in that the Entwärmungsvorrichtung (2) has a length of 50 to 500 mm, preferably from 100 to 300 mm. Electrical line arrangement (100), with an electrical line (1) having an inner conductor (3) and a surrounding insulating jacket (4) of a preferably void-free, solid material, and a Entwärmungsvorrichtung (2) with a flexible or pliable sleeves - or tubular body having a between an inner wall (7) and an outer wall (8) enclosed coolant space (9) and to the inner wall (7) adjacent through opening (6) in which the conduit (1) is accommodated. Electrical line arrangement (100) according to Claim 6 , characterized in that the electrical line arrangement (100) between two electrical components (200, 300), preferably a charging socket and a rechargeable energy storage of an electric vehicle, is arranged and during operation of the components (200, 300) current with a current of 270 A or more is flowing. Method for the decoupling of an electrical line (1), comprising the steps: Providing the electrical line (1), Attaching a flexible or non-rigid cooling device (2) having a passage opening (6) to an outer peripheral surface (5) of the line (1), - Let flow of a coolant in between a inner wall (7) and an outer wall (8) of the Entwärmungsvorrichtung (2) formed coolant space (9). Method according to Claim 8 , characterized in that the conduit (1) first threaded through the through hole (6) of the still limp Entwärmungsvorrichtung (2) and then the coolant is pressurized. Method according to Claim 8 or 9 , characterized in that the passage opening (6) is provided with a diameter which is smaller than an outer diameter of the conduit (1). Method according to Claim 10 , characterized in that the passage opening (6), in particular by use of a spreading tool, spread and then the line (1) is threaded therethrough.

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