DE102020112332A1 - Charging socket for an electric vehicle, electrical connection arrangement and motor vehicle - Google Patents

Abstract

The invention relates to a charging socket for an electric vehicle, with a first DC contact (210) and a second DC contact (220), the first and second DC contacts (210, 220) being set up to accommodate a charging plug, wherein a connection (240) for receiving a plug (300) is arranged on a side (230) facing away from the first and second DC contact (210, 220), the connection (240) having a first pole (241) and a second Pole (242), the first pole (241) being electrically conductively connected to the first DC contact (210), the second pole (242) being electrically conductively connected to the second DC contact (220) and the the first pole (241) and the second pole (242) are arranged coaxially to one another.

Description

The invention relates to a charging socket for an electric vehicle. The invention also relates to an electrical connection arrangement and a motor vehicle.

Motor vehicles that are partially or completely driven by an electric motor have an electric motor which is connected to a traction battery in order to supply the electric motor with electrical power.

To charge the traction battery, a charging socket on the electric vehicle is connected, for example, to a charging plug of a public charging station, a wallbox or the like. The charging socket forms a charging connector with the matching charging plug. Such charging plug connections formed from charging socket and charging plug are standardized.

Charging plug connections can be set up for charging with direct current and / or with alternating current. Charging a traction battery with direct current has the advantage that very high charging capacities can be transferred and thus the charging time is shortened compared to charging with alternating current. For charging with direct current, a charging socket usually has two standardized direct current contacts (DC contacts), which are arranged next to one another in the charging socket.

The two DC contacts are connected to the poles of the traction battery within the motor vehicle via battery cables or battery lines in order to transfer the charging power from the charging station to the traction battery via the charging plug connection. To connect the battery cable to the charging socket, it is known to crimp or weld the cable ends to the rear of the charging socket. This type of connection is expensive to repair in the event of a defect in the cable, plug or charging socket.

It is known to use battery connectors to connect the battery cables in the area of the traction battery. These battery connectors are either designed individually for each pole of the battery or contact both poles through a single battery connector. The two poles are usually arranged next to one another in such a battery connector.

Known battery connectors cannot easily be used within the motor vehicle to connect the battery cables to the charging socket. Because the shape of the battery connector and the orientation of a connector receptacle of the charging socket would determine the direction of the cable outlet in the area of the charging socket. For example, a manufacturer-specific connector would be required for each deviating vehicle manufacturer specification for orienting the cable outlet. This would result in a high development effort and thus high costs. Furthermore, battery connectors of this type have a very large overall size, so that they do not fit into the limited installation space of a charging socket.

The present invention is based on the object of specifying an improved charging socket for an electric vehicle which can be produced in a simple and cost-effective manner and in particular enables a large number of different cable outlet directions. Furthermore, an electrical connection arrangement and a motor vehicle with such a charging socket are to be specified.

The object is achieved in each case by the independent claims. Advantageous developments of the invention emerge from the dependent claims and the description below.

The invention relates to a charging socket for an electric vehicle, with a first DC contact and with a second DC contact, the first and second DC contacts being designed to accommodate a charging plug, with on a side facing away from the first and second DC contact a connection for receiving a plug is arranged, the connection having a first pole and a second pole, the first pole being electrically conductively connected to the first DC contact, the second pole being electrically conductively connected to the second DC contact and wherein the first pole and the second pole are arranged coaxially with one another.

Because the first pole and the second pole are arranged coaxially to one another, the connection is not restricted to a single orientation of an associated plug. Rather, it can be provided that a plug assigned to the connection can be positioned in at least two or more orientations, in particular a multiplicity of orientations, relative to the connection.

The first pole and the second pole are in particular arranged coaxially with respect to an axis, an insertion direction along which an associated plug can be inserted into the connection running along this axis.

If a DC contact is mentioned here, it is a direct current contact. The terms “DC contact” and “direct current contact” are used synonymously here.

The charging socket can be a charging socket for direct current charging, for example according to the IEC 62196 standard (DIN EN 62196) or a charging socket according to a vehicle manufacturer-specific standard. The charging socket can only be set up for direct current charging and not be suitable for alternating current charging. Alternatively, the charging socket can be set up for both AC charging and DC charging.

When a motor vehicle with an electric motor is mentioned here, it is an electric vehicle that is driven exclusively by an electric motor, or a hybrid vehicle that is partially driven by an electric motor.

In order to achieve a construction that is as compact as possible, it can be provided that the first pole surrounds the second pole at least in sections on the circumferential side. In particular, it can be provided that the first pole completely surrounds the second pole on the circumferential side.

The first pole can have a sleeve or consist of a sleeve. Alternatively or in addition, the second pole can have a pin or consist of a pin. The sleeve can, for example, have a circular cylindrical shape with a circular cylindrical through opening in which the second pole is seated. The second pole can also have a circular cylindrical shape. The circular cylindrical shape favors the coaxially arranged poles favors that a complementary shaped plug can be plugged onto the receptacle in any orientation.

According to alternative embodiments, it can be provided that the second pole is also a sleeve.

According to further refinements, it can be provided that the pin and / or the sleeve, viewed in a section perpendicular to the insertion direction, have a polygonal shape, for example a triangular, square, pentagonal, hexagonal or polygonal shape, instead of the circular-cylindrical cross-section described above. The polygonal cross-sectional shape of the receptacle specifies the number of possible orientations of the plug relative to the charging socket for a complementarily shaped plug. The polygonal shape has the advantage that the shape of the poles can be used to secure a plug in the receptacle against twisting.

An air gap can be provided between the first pole and the second pole in order to reliably separate the two poles from one another.

In the event that the first pole has a sleeve and the second pole has a pin, it can be provided that the pin has an outer jacket surface which is at a constant radial distance from an inner jacket surface of the sleeve, the inner jacket surface of the sleeve facing the outer surface of the pin.

The first pole and the first DC contact can be connected to one another in an electrically conductive manner via a first contact element. As an alternative or in addition, the second pole and the second DC contact can be connected to one another in an electrically conductive manner via a second contact element. A respective contact element can serve to compensate for a transverse offset between a respective DC contact and a respectively assigned pole. For example, it can be provided that a respective contact element is a plate.

It can be provided that at least one of the contact elements has a through opening for leading through a pole. For example, it can be provided that a sleeve-shaped first pole is assigned to the first DC contact and a pin-shaped second pole is assigned to the second DC contact, the pin-shaped second pole being guided through a through opening of the first contact element. A compact arrangement of the coaxial poles and the associated contact elements can thus be achieved.

The contact elements can comprise an electrically conductive material or consist of an electrically conductive material such as copper, aluminum or the like.

On the side facing away from the first and second DC contact, shaped elements can be arranged in order to receive a connector on the connection in a rotationally secure manner. In particular, the shaped elements form a stop which positively counteracts any rotation of the plug relative to the charging socket.

The shaped elements can be arranged or formed on a housing of the charging socket.

The shaped elements can be arranged distributed around the first and second pole at equidistant angular intervals. The angular distances between the shaped elements therefore determine the mounting options for the relative orientation of a plug on the charging socket.

The shaped elements can be webs and / or recesses.

The shaped elements can be arranged or molded onto an essentially annular collar of the housing.

The shaped elements can be arranged on an inner lateral surface of the collar facing the first pole. As an alternative or in addition, the shaped elements can be arranged on an outer jacket surface of the collar facing away from the first pole.

A longitudinal extension of the shaped elements of the charging socket can be oriented essentially parallel to the axis with respect to which the first pole and the second pole are arranged coaxially.

The collar can delimit a through opening within which the first pole and the second pole are arranged.

The housing can have an electrically insulating material or consist of an electrically insulating material.

At least one contact spring, which is set up to rest on a plug, can be arranged on the first pole. The contact spring can be a spiral spring or a lamellar sleeve.

The contact spring can sit in a recess or groove in the first pole and be secured in a form-fitting manner against being pulled off or slipping off along the insertion direction. The contact spring is used to bring about reliable contact with a plug inserted into the receptacle. In particular, the contact spring is used to form a plurality of contact points for a plug inserted into the receptacle.

At least one contact spring, which is set up for contact with a plug, can be arranged on the second pole. The contact spring can be a spiral spring or a lamellar sleeve.

The contact spring can sit in a recess or groove in the second pole and be secured in a form-fitting manner against being pulled off or slipping off along the insertion direction. The contact spring is used to bring about reliable contact with a plug inserted into the receptacle. In particular, the contact spring is used to form a plurality of contact points for a plug inserted into the receptacle.

The invention further relates to an electrical connection arrangement with a charging socket configured in the manner according to the invention and with a plug, the plug having a first plug contact, the plug having a second plug contact, the first plug contact and the second plug contact being coaxial with one another are arranged, wherein the plug is plugged onto the connection of the charging socket, the first plug contact is electrically connected to the first pole of the charging socket and the second plug contact is electrically connected to the second pole of the charging socket.

Accordingly, the plug with its coaxial plug contacts sits in the connection with its coaxial poles. Thus, in the mated state, the first plug contact, the second plug contact, the first pole and the second pole are arranged coaxially. In this way, a compact plug connection that is flexible in terms of the relative orientation of the plug to the charging socket can be specified, so that a multitude of different possible uses are given in a multitude of different vehicle types, each of which specifies different cable outlet directions for the plug.

The first plug contact and the second plug contact can be sleeve-shaped.

In particular, the second plug contact can be a pin or a sleeve. The first plug contact and the second plug contact can have a substantially circular cylindrical shape. Alternatively, the first plug contact and / or the second plug contact can have a polygonal cross-sectional shape.

A cable outlet on the plug can be inclined at 90 ° to the plug-in direction of the plug. It goes without saying that other orientations of the cable outlet can also be provided. For example, a cable outlet can also be oriented along the insertion direction so that the cable outlet is not inclined relative to the insertion direction.

A contact spring can be arranged between the first pole and the first plug contact in order to achieve reliable contact between the first pole and the first plug contact. In particular, it can be provided that the contact spring is elastically tensioned in a resilient manner between the first pole and the first plug contact.

Alternatively or in addition, it can be provided that the second contact spring is arranged between the second pole and the second plug contact. The second contact spring is used for reliable contact between the second pole and the second plug contact.

The first contact spring and / or the second contact spring can each be designed as a spiral spring. Such a spiral spring can in particular be bent in a ring shape and one at a time Have a plurality of contact points to the respectively assigned pole and plug contact.

For example, the spiral spring can surround the first pole at least in sections on the circumferential side, in particular surround it completely on the circumferential side.

Alternatively, the first contact spring and / or the second contact spring can be a lamellar spring, in particular a sleeve-shaped spring. For example, it can be provided that such a lamellar spring sits on the first pole and / or the second pole of the connection and is elastically tensioned between the respective plug contacts and the respectively assigned poles by pushing the plug on.

The plug can have at least one shaped element which rests against at least one shaped element of the housing in order to secure the plug against twisting relative to the charging socket. When plugged in, the plug is therefore positively secured against twisting, so that the orientation of the plug relative to the charging socket established by inserting the plug into the receptacle is reliably maintained even during the operation of a vehicle and the dynamic loads that occur.

The shaped element of the plug can be formed on a plug housing of the plug.

A longitudinal extension of the molded element of the plug can be oriented essentially parallel to the axis with respect to which the first plug contact and the second plug contact are arranged coaxially.

The plug can have two or more shaped elements or exactly two shaped elements in order to secure the plug against twisting relative to the charging socket.

At least one shaped element of the plug can be a web. Alternatively or in addition, at least one shaped element of the plug can be a recess.

The invention further relates to a motor vehicle, with an electric motor for the electric motor drive of the motor vehicle, with a traction battery for supplying energy to the electric motor, and with an electrical connection arrangement described above, wherein the connector is arranged at a first end of a battery line and a second end of the battery line with a The first battery pole and a second battery pole of the traction battery are connected, the first pole of the plug being connected to the first battery pole of the traction battery via a first conductor of the battery line and the second pole of the plug being connected to the second battery pole of the traction battery via a second conductor of the battery line connected is.

• 1A eine erfindungsgemäße elektrische Anschlussanordnung in einer perspektivischen Rückansicht im gesteckten Zustand,
• 1 B die Anschlussanordnung aus 1A in einer perspektivischen Rückansicht im nicht gesteckten Zustand,
• 1C die Anschlussanordnung aus 1A in einer Rückansicht,
• 1D die Anschlussanordnung aus 1A in einer Seitenansicht,
• 1E die Anschlussanordnung aus 1A in einer Frontansicht,
• 2 die Ladedose der Anschlussanordnung aus 1A in einer Rückansicht,
• 3A eine Variante A der Anschlussanordnung in einem Querschnitt A-A gemäß 1E,
• 3B eine Ausschnittvergrößerung der 3A,
• 4A eine Variante B der Anschlussanordnung in einem Querschnitt B-B gemäß 1E,
• 4B eine Ausschnittvergrößerung der 4A,
• 5A den Stecker der Anschlussanordnung in einer perspektivischen Ansicht,
• 5B den Stecker der Anschlussanordnung in einer weiteren perspektivischen Ansicht,
• 6 DC-Kontakte der Ladedose in einer vereinzelten perspektivischen Darstellung,
• 7A die Anschlussanordnung mit dem Stecker in einer ersten Orientierung relativ zur Ladedose,
• 7B die Anschlussanordnung mit dem Stecker in einer zweiten Orientierung relativ zur Ladedose,
• 7C die Anschlussanordnung mit dem Stecker in einer dritten Orientierung relativ zur Ladedose,
• 7D die Anschlussanordnung mit dem Stecker in einer vierten Orientierung relativ zur Ladedose,
• 7E die Anschlussanordnung mit dem Stecker in einer fünften Orientierung relativ zur Ladedose.

The invention is described in more detail below with the aid of a drawing showing exemplary embodiments. They each show schematically:

• 1A an electrical connection arrangement according to the invention in a perspective rear view in the plugged-in state,
• 1 B. the connection arrangement 1A in a perspective rear view when not plugged in,
• 1C the connection arrangement 1A in a rear view,
• 1D the connection arrangement 1A in a side view,
• 1E the connection arrangement 1A in a front view,
• 2 the charging socket of the connection arrangement 1A in a rear view,
• 3A a variant A of the connection arrangement in a cross section AA according to 1E ,
• 3B an enlarged section of the 3A ,
• 4A a variant B of the connection arrangement in a cross section BB according to 1E ,
• 4B an enlarged section of the 4A ,
• 5A the plug of the connection arrangement in a perspective view,
• 5B the plug of the connection arrangement in a further perspective view,
• 6th DC contacts of the charging socket in an isolated perspective view,
• 7A the connection arrangement with the plug in a first orientation relative to the charging socket,
• 7B the connection arrangement with the plug in a second orientation relative to the charging socket,
• 7C the connection arrangement with the plug in a third orientation relative to the charging socket,
• 7D the connection arrangement with the plug in a fourth orientation relative to the charging socket,
• 7E the connection arrangement with the plug in a fifth orientation relative to the charging socket.

1A shows an electrical connection arrangement 100 with a charging socket according to the invention 200 and with a plug 300 .

Below is the charging socket 200 described in more detail.

The charging socket 200 is a charging socket for an electric vehicle. The charging socket 200 has a first DC contact 210 and a second DC contact 220 . The DC contacts 210 , 220 are set up to accept a charging plug ( 1E , 3A , 4A , 6th ).

On one of the first DC contact 210 and the second DC contact 220 remote side 230 the charging socket 200 is a connection 240 to accommodate the plug 300 arranged (see 1B) .

The connection 240 has a first pole 241 and a second pole 242 on. The first pole 241 is electrically conductive with the first DC contact 210 tied together. The second pole 242 is electrically conductive to the second DC contact 220 tied together.

The first pole 241 and the second pole 242 are arranged coaxially to one another. In the present case are the first pole 241 and the second pole 242 coaxial to an axis Z arranged, for example in 3A is drawn.

Like depicting the 1B can be seen from the first pole 241 the second pole 242 on the circumference. To illustrate the individual components of the charging socket 200 and the plug 300 is the connector 300 in 1 B. im not plugged in and to the charging socket 200 shown spaced.

The first pole 241 is in the present case a sleeve 241 and the second pole 242 is in the present case a pen 242 .

Between the first pole 241 and the second pole 242 is an air gap 243 intended.

The first pole 241 and the first DC contact 210 are via a first contact element 250 electrically connected to each other (see 3A , 3B) . The second pole 242 and the second DC contact 220 are via a second contact element 260 electrically connected to each other. The first contact element 250 and the second contact element 260 are each designed plate-shaped.

The first contact element 250 has a through opening 251 on through which the second pole 242 is pushed through.

As in 3A the first DC contact can be seen 210 and the second DC contact 220 at a distance next to each other and parallel to the axis Z oriented extends.

The first contact element 250 and the second contact element 260 serve to offset the DC contacts axially 210 , 220 to the poles 241 , 242 to bridge.

The DC contacts 210 , 220 , the contact elements 250 , 260 and the poles 241 , 242 consist in the present case of an electrically conductive material.

On the DC contacts 210 , 220 remote side 230 are form elements 271 on a housing 270 the charging socket 200 provided (see e.g. 1 B. , 2 ). The case 270 and the form elements 271 presently have an electrically insulating material.

The form elements 271 are bridges 271 at equidistant angular intervals around the first pole 241 and the second pole 242 are arranged. A longitudinal extension of the webs 271 is parallel to the axis Z oriented.

The form elements 271 are at one essentially circular around the axis Z all-round collar 272 of the housing 270 formed, the shaped elements 271 starting from one of the first pole 241 facing away, outer jacket surface 273 of the collar 272 are extended.

The collar 272 delimits a passage opening 274 of the housing 270 , within which the first pole 241 and the second pole 242 are arranged. In other words, the collar holds 272 the first pole 241 and the second pole 242 on the circumference.

The plug 300 has a first plug contact 310 and a second plug contact 320 . The first plug contact 310 and the second plug contact are arranged coaxially to one another (see e.g. 3A , 5A , 5B) .

In the fully assembled state of the electrical connection arrangement 100 , such as 1A the plug can be seen 300 on the connection 240 the charging socket 200 attached.

The first plug contact is here 310 electrically conductive with the first pole 241 the charging socket 200 connected and the second plug contact 320 is electrically conductive with the second pole 242 the charging socket 200 tied together.

The plug 300 has a first shape element 330 and a second shape element 340 . The form elements 330 , 340 when plugged are in each case on assigned form elements 271 of the housing 270 the charging socket 200 to the plug 300 relative to the charging socket 200 against twisting the axis Z to secure. The form elements 330 , 340 are on a housing 350 of the plug 300 educated.

5B shows the connector 300 without the case 350 . The plug 300 is at a first end 510 a battery line 500 arranged. The battery line 500 has a first leader 520 , the one with the first plug contact 310 of the plug 300 is electrically connected. The battery line 500 has a second head 530 the one with the second plug contact 320 of the plug 300 is electrically connected. A second end of the battery line, not shown here 500 is intended for connection to a traction battery of a motor vehicle with an electric motor.

The electrically conductive contact between the poles 241 , 242 and the respectively assigned plug contacts 310 , 320 in the present case takes place via contact springs between the poles 241 , 242 and the respectively assigned plug contacts 310 , 320 are arranged. In this regard, the 3A and 3B a first variant A of an embodiment of contact springs is described. the 4A and 4B describe a second variant B of a further embodiment of contact springs. The sectional views AA and BB therefore show the same sectional plane for different structural configurations of the electrical connection arrangement 100 according to the first variant A and according to the second variant B.

According to variant A is between the first pole 241 and the first plug contact 310 a contact spring 410 in the form of a spiral spring 410 arranged. Between the second pole 242 and the second plug contact 320 are two contact springs 420 , 430 in the form of the spiral spring 420 and the coil spring 430 arranged.

The spiral spring 410 is curved in a ring and encloses the first pole 241 circumferential. The spiral spring 410 is in a circular shape around the axis Z circumferential groove 311 of the first plug contact 310 recorded.

The coil springs 420 , 430 are each bent in a ring and enclose the second pole 242 circumferential. The spiral spring 420 is circular in a first around the axis Z circumferential groove 321 of the second plug contact 320 arranged. The spiral spring 430 is circular in a second around the axis Z circumferential groove 322 of the second plug contact 320 arranged.

The coil springs 410 , 420 , 430 are each resiliently elastic between the associated poles 241 , 242 and the assigned plug contacts 310 , 320 tense. Due to the spiral shape of the coil springs 410 , 420 , 430 are a multitude of contact points of the respective spiral springs 410 , 420 , 430 to the respective poles 241 , 242 and the assigned plug contacts 310 , 320 educated.

The coil springs 410 , 420 , 430 consist of an electrically conductive material.

the 4A and 4B show the compared to the 3A and 3B Modified structural variant B, which differs from variant A described above in that, instead of the spiral springs, lamellar springs are now used to make contact between the poles and the plug contacts.

So is between the first pole 241 and the first plug contact 310 a lamellar spring 440 arranged. Between the second pole 242 and the second plug contact 320 is a lamellar spring 450 arranged.

The lamellar spring 440 is essentially sleeve-shaped and has a plurality of lamellae 441 on starting from the pole 241 viewed convex in the direction of the first plug contact 310 are arched. The lamellar spring 450 a plurality of lamellas 451 on starting from the pole 242 convex in the direction of the second plug contact 320 are arched.

The lamellar spring 440 is resilient between the first pole 241 and the first plug contact 310 tense. The lamellar spring 450 is resiliently elastic between the second pole 242 and the second plug contact 320 tense.

The lamellar spring 440 sits in a groove 243 of the first pole 241 . The lamellar spring 450 sits in a groove 244 of the second pole 242 .

The lamellar spring 440 forms through the plurality of lamellae distributed around the circumference 441 a plurality of contact points to the first plug contacts 310 the end. The lamellar spring forms the same 450 by the plurality of lamellae distributed around the circumference 451 a plurality of contact points to the second plug contact 320 the end.

6th shows the DC contacts 210 , 220 together with the contact elements 250 , 260 and the Poland 241 , 242 in an isolated perspective representation.

the 7A until 7E show examples of five different orientations of the connector 300 relative to the charging socket 200 . For connecting the plug 300 with the charging socket 200 becomes the connector 300 from the in 1B position shown along an insertion direction on the receptacle 240 the charging socket 200 pushed on or inserted into the receptacle. The direction of insertion is along the axis Z oriented.

Using the features 330 , 340 of the plug 300 and the form elements 271 the charging socket 200 is the connector 300 twist-proof on the charging socket 200 held so that the plug is on the receptacle 240 attached state not around the axis Z can be twisted. In each of the exemplarily with the 7A until 7E orientations shown is the connector 300 therefore positively secured against twisting on the charging socket 200 set.

As for example in 3A to recognize closes a longitudinal axis L. of the head 530 with the axis Z an angle a of 90 °. Accordingly, it is parallel to the longitudinal axis L. running cable outlet direction of the battery cable 500 by 90 ° to the axis Z and inclined in the direction of insertion. According to alternative embodiments, it can be provided that the angle a is smaller or larger than 90 °. In particular, it can be provided that the angle a between the longitudinal axis L. and the axis Z is greater than 90 °. For example, it can be provided that the longitudinal axis L. in the in 3A top view shown collinear to the axis Z is oriented.

List of reference symbols

100

electrical connection arrangement

200

Charging socket

210

DC contact

220

DC contact

230

page

240

connection

241

first pole

242

second pole

243

Air gap

244

Groove

245

Groove

250

first contact element

251

Through opening

260

second contact element

270

casing

271

Form elements

272

collar

273

outer jacket surface

274

Through opening

300

plug

310

first plug contact

311

Groove

320

second plug contact

321

Groove

322

Groove

330

first form element

340

second form element

350

casing

410

Coil spring

420

Coil spring

430

Coil spring

440

Lamellar spring

441

Slats

450

Lamellar spring

451

Slats

500

Battery line

510

first end

520

first head

530

second head

Z

axis

L.

Longitudinal axis

a

angle

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Non-patent literature cited

• Standard IEC 62196 [0014]
• (DIN EN 62196) [0014]

Claims (15)

Charging socket for an electric vehicle, with a first DC contact (210) and with a second DC contact (220), the first and second DC contacts (210, 220) being set up to accommodate a charging plug, with one of the first and a connection (240) for receiving a plug (300) is arranged on the second DC contact (210, 220) facing away from the side (230), the connection (240) having a first pole (241) and a second pole (242) , wherein the first pole (241) is electrically conductively connected to the first DC contact (210), wherein the second pole (242) is electrically conductively connected to the second DC contact (220) and wherein the first pole (241) and the second pole (242) are arranged coaxially with one another. Charging socket after Claim 1 , characterized in that the first pole (241) surrounds the second pole (242) at least in sections on the circumferential side. Charging socket according to one of the Claims 1 or 2 , characterized in that the first pole (241) has a sleeve and / or the second pole (242) has a pin. Charging socket according to one of the preceding claims, characterized in that an air gap (243) is provided between the first pole (241) and the second pole (242). Charging socket according to one of the preceding claims, characterized in that the first pole (241) and the first DC contact (210) are electrically conductively connected to one another via a first contact element (250) and / or the second pole (242) and the second DC contact (220) are connected to one another in an electrically conductive manner via a second contact element (260). Charging socket according to one of the preceding claims, characterized in that on the side (230) facing away from the first and second DC contacts (210, 220), molded elements (271) are arranged on a housing (270) of the charging socket (200) to provide a The plug (300) can be accommodated on the connection (240) so that it cannot twist. Charging socket after Claim 6 , characterized in that the shaped elements (271) are arranged distributed at equidistant angular intervals around the first and second pole (241, 242). Charging socket after Claim 6 or Claim 7 , characterized in that the shaped elements (271) are arranged or formed on a collar (272) of the housing (270) of the charging socket (200), which is essentially ring-shaped. Charging socket after Claim 8 , characterized in that the shaped elements (271) are extended starting from an inner jacket surface of the collar (272) facing the first pole (241) and / or starting from an outer jacket surface (273) of the collar (272) facing away from the first pole (241) Collar (272) are extended. Charging socket after Claim 8 or Claim 9 , characterized in that the collar (273) delimits a through opening (274) within which the first pole (241) and the second pole (242) are arranged. Electrical connection arrangement, with a charging socket (200) according to one of the preceding Claims 1 until 10 and with a plug (300), wherein the plug (300) has a first plug contact (310) and wherein the plug (300) has a second plug contact (320), wherein the first plug contact (310) and the second plug contact (320) are arranged coaxially to one another, the plug (300) being plugged onto the connection (240) of the charging socket (200), the first plug contact (310) being electrically conductively connected to the first pole (341) of the charging socket (200) and wherein the second plug contact (320) is electrically conductively connected to the second pole (342) of the charging socket (200). Electrical connection arrangement according to Claim 11 , characterized in that at least one first contact spring (410, 440) is arranged between the first pole (341) and the first plug contact (310) and / or at least one second contact spring (420) between the second pole (342) and the second plug contact , 430, 450) is arranged. Electrical connection arrangement according to Claim 12 , characterized in that the first and / or the second contact spring is a spiral spring (410, 420, 430), or that the first and / or the second contact spring is a particularly sleeve-shaped lamellar spring (440, 450). Electrical connection arrangement according to one of the Claims 11 until 13th , with a charging socket (200) according to one of the preceding Claims 6 until 10 , characterized in that the plug (300) has at least one shaped element (330, 340) which rests against at least one shaped element (271) of the housing (270) in order to secure the plug against twisting relative to the charging socket. Motor vehicle, with an electric motor for the electric motor drive of the motor vehicle, with a traction battery for supplying energy to the electric motor, with an electrical connection arrangement (100) according to one of the Claims 11 until 14th , the plug (300) at a first end (510) of a battery line (500) is arranged and a second end of the battery line is connected to a first battery pole and a second battery pole of the traction battery, the first pole (310) of the plug (300) via a first conductor (520) of the battery line (500) is connected to the first battery pole of the traction battery and wherein the second pole (320) of the plug is connected to the second battery pole of the traction battery via a second conductor (530) of the battery line (500).

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