DE102016011036A1 - Electric charging device, charging plug and electric charging device in combination with the charging plug - Google Patents

Abstract

The invention relates to an electrical charging device (1) for an electrical energy store of a vehicle with a charging socket (1.1), comprising - a socket housing (1.1.1), - at least one earthing contact pin (1.1.3) and - at least one electrical contact (1.1. 2) with a receiving area (1.1.2.1) for receiving a corresponding electrical contact (2.1.1) of a charging plug (2). According to the invention, it is provided that - the earthing contact pin (1.1.3) is connected to a drive motor (1.3) by means of which the earthing contact pin (1.1.3) is rotatable relative to the socket housing (1.1.1), - the earthing contact pin (1.1.3) is provided with a thread (1.1.3.1) which can be brought into operative engagement with a corresponding mating thread (2.1.2.1) of a protective sleeve (2.1.2) of the charging plug (2), and - the receiving area (1.1.2.1) of the at least one electrical contact (1.1.2) in the direction of a free end (1.1.2.2) is conically widening. The invention further relates to a charging plug (2) for connection to a charging socket (1.1) of such an electrical charging device (1) and to an electric charging device (1) in combination with such a charging plug (2).

Description

The invention relates to an electrical charging device of an electrical energy storage device of a vehicle with a charging socket according to the preamble of claim 1. The invention further relates to a charging plug for connecting to a charging socket of such an electric charging device. The invention further relates to an electrical charging device in combination with such a charging connector.

Electric charging devices for vehicles, in particular for electric vehicles, are known from the prior art. For example, in the DE 10 2011 004 648 A1 a charging device for an electric vehicle described. The charging device comprises a plurality of electrical contacts for charging the battery of the electric vehicle with direct current and / or alternating current. At least two displaceable electrical contacts are provided, which can be moved between a starting position and an end position for electrical connection with electrical contacts of a corresponding charging device by a drive. Furthermore, at least one detector device is provided, in particular with one, preferably two microswitches, which is able to determine the position of a displaceable electrical contact.

The invention is based on the object of specifying an improved over the prior art electrical charging device. The invention is further based on the object to provide an improved charging connector and an electric charging device in combination with such a charging connector.

With regard to the electric charging device, the object is achieved according to the invention with the features specified in claim 1. With regard to the charging plug, the object is achieved according to the invention with the features specified in claim 3.

With regard to the electric charging device in combination with the charging plug, the object is achieved according to the invention with the features specified in claim 4.

Advantageous embodiments of the invention are the subject of the dependent claims.

An electrical charging device for an electrical energy store of a vehicle comprises a charging socket with a socket housing, at least one safety contact pin and at least one electrical contact with a receiving area for receiving a corresponding electrical contact of a charging plug.

According to the invention it is provided that the protective contact pin with a drive motor, for. As a hand spindle or an electric motor, is connected, by means of which the protective contact pin is rotatable relative to the socket housing, that the protective contact pin is provided with a thread which can be brought into operative engagement with a corresponding mating thread of a protective sleeve of the charging plug, and that the receiving area of at least an electrical contact in the direction of a free end is conically widening.

The charging socket formed in this way enables a positive and non-positive connection with a corresponding charging plug, in which a contact surface between the electrical contacts of the charging socket and the electrical contacts of the charging plug over the prior art is increased. This is due on the one hand to the conical shape of the electrical contacts and the other to the non-positive connection between the charging plug and the charging socket, wherein when connecting the charging plug with the charging socket of the drive motor rotates the protective contact pin relative to the protective sleeve and the thread of the protective contact pin the mating thread of the protective sleeve engages. In this case, the plug housing is moved relative to the socket housing in the direction of the socket housing, resulting in the electrical contacts of the charging plug are each pressed into the receiving area of the electrical contacts of the charging socket. Due to the increased contact area, a contact resistance between the electrical contacts and thus a power dissipated as heat flow power loss can be reduced. This allows higher charging currents compared to the prior art and thus reduced charging times and avoiding or at least reducing thermal overloading of the electrical contacts. The charging socket thus makes it possible for a layman quickly releasable plug-in connection, which can be plugged with a comparatively small, applied by a user, force and also released again. Furthermore, the charging socket requires very little space. Embodiments of the invention will be explained in more detail below with reference to a drawing.

Showing:

1 schematically a sectional view of an electrical charging device in combination with a charging plug in the disconnected state.

The only 1 shows an embodiment of an electric charging device 1 one not shown electrical energy storage of a vehicle and a charging plug 2 in a sectional view, in particular in a longitudinal section.

The electric charging device 1 includes a charging socket 1.1 which is arranged in or on the vehicle and firmly connected thereto. The vehicle is a hybrid vehicle with an electric drive, not shown, or a purely electrically powered vehicle. For storing electrical energy, the vehicle comprises the electric energy storage, not shown.

The charging socket 1.1 includes a female housing 1.1.1 in which a number of electrical contacts 1.1.2 is arranged. According to the present embodiment, two electrical contacts 1.1.2 arranged. The electrical contacts 1.1.2 each have a receiving area 1.1.2.1 on, which towards a free end 1.1.2.2 widening conically. That is, a diameter of the receiving area 1.1.2.1 increases towards the free end 1.1.2.2 continuously. To charge the electrical energy storage is this with the electrical contacts 1.1.2 via electrical lines 1.2 , which are shown only partially in the present embodiment, electrically connected.

Furthermore, in the socket housing 1.1.1 between the electrical contacts 1.1.2 a protective contact pin 1.1.3 arranged, which a protective ground of the charging device 1 and one with the charging plug 2 connected energy source is used. This is the protective contact pin 1.1.3 connected in a manner not shown with a protective conductor. The protective contact pin 1.1.3 continues to serve a positive connection between the charging socket 1.1 and the charging plug 2 when charging the electrical energy storage. This is the protective contact pin 1.1.3 with a schematically indicated drive motor 1.3 , z. As a servo motor or a hand spindle, connected by means of which the ground contact pin 1.1.3 relative to the socket housing 1.1.1 as well as relative to the charging plug 2 is rotatable. Furthermore, the protective contact pin 1.1.3 a thread 1.1.3.1 on, in particular an external thread, which is provided for producing the frictional connection, in particular a screw connection, which will be discussed in more detail later. In addition, not shown insulation of the electrical contacts 1.1.2 provided against touching with fingers.

The charging plug 2 includes a connector housing 2.1 in which a number of corresponding electrical contacts 2.1.1 is arranged. According to the present embodiment, two corresponding electrical contacts 2.1.1 arranged. The corresponding electrical contacts 2.1.1 are pin-shaped and have a towards a free end 2.1.1.1 conically tapering course. That is, a diameter of the corresponding electrical contacts 2.1.1 decreases towards the free end 2.1.1.1 continuously. The corresponding electrical contacts 2.1 .1 thus form a positive shape to the receiving areas 1.1.2.1 the electrical contacts 1.1.2 the charging socket 1.1 so that the corresponding electrical contacts 2.1.1 positive fit in the receiving areas 1.1.2.1 can be arranged if the charging plug 2 with the charging socket 1.1 is mechanically connected. Due to the conical shape of both the electrical contacts 1.1.2 as well as the corresponding electrical contacts 2.1.1 is a contact surface between the electrical contacts 1.1.2 . 2.1.1 increased in the connected state compared to constant diameters. Furthermore, the corresponding electrical contacts 2.1.1 according to the present embodiment, a profiled surface 2.1.1.2 auf, which serves a compensation of possible bumps.

Furthermore, in the connector housing 2.1 between the corresponding electrical contacts 2.1.1 a protective sleeve 2.1.2 arranged. The protective sleeve 2.1.2 has a counter thread 2.1.2.1 , in particular an internal thread, which, with the thread 1.1.3.1 the protective contact pin 1.1.3 is operatively engageable.

For connecting the charging plug 2 with the charging socket 1.1 becomes the connector housing 2.1 in the socket housing 1.1.1 introduced. In the process, the corresponding electrical contacts 2.1.1 positive fit in the receiving areas 1.1.2.1 the electrical contacts 1.1.2 added. After that, the drive motor becomes 1.3 activated and the protective contact pin 1.1.3 relative to the protective sleeve 2.1.2 rotated, causing the thread 1.1.3.1 in the mating thread 2.1.2.1 engages and a non-positive connection, in particular a screw, between the charging socket 1.1 and the charging plug 2 will be produced. When making the screw is the charging plug 2 axially in the direction of the charging socket 1.1 moves, causing the corresponding electrical contacts 2.1.1 continue into the respective recording area 1.1.2.1 be pressed. This will change the contact area between the electrical contacts 1.1.2 . 2.1.1 further increased and the charging plug 2 placed in a locked position. Preferably, a contact resistance between the electrical contacts 1.1.2 . 2.1.1 detected, so that after exceeding a predetermined threshold value of the drive motor 1.3 is switched off. The frictional connection also allows a comparison with the prior art improved sealing of the connection between the charging plug 2 and the charging socket 1.1 ,

The increased contact area results in a reduced contact resistance and thus a reduced power dissipation in the form of a heat flow. Thus, over the prior art, higher charging currents can be transmitted until, due to the dissipated power loss, a maximum allowable temperature of the electrical contacts 1.1.2 . 2.1.1 is reached.

As an alternative to the exemplary embodiment shown, in addition to the protective contact pin 1.1.3 be provided a further contact element, which instead of the protective contact pin 1.1.3 with the thread 1.1.3.1 provided and with the drive motor 1.3 connected is. The charging plug 2 has a corresponding additional contact element in this alternative embodiment. In addition, the drive motor shown 1.3 also in the charging plug 2 be arranged and, for example, the protective sleeve 2.1.2 or drive the additional contact element.

LIST OF REFERENCE NUMBERS

1

loader

1.1

charging socket

1.1.1

socket housing

1.1.2

electric contact

1.1.2.1

reception area

1.1.2.2

free end

1.1.3

Earth Contact

1.1.3.1

thread

1.2

electrical line

1.3

drive motor

2

charging plug

2.1

plug housing

2.1.1

corresponding electrical contact

2.1.1.1

free end

2.1.1.2

surface

2.1.2

protective sleeve

2.1.2.1

mating thread

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 102011004648 A1 [0002]

Claims (5)

Electric charging device ( 1 ) for an electrical energy store of a vehicle with a charging socket ( 1.1 ), comprising - a female housing ( 1.1.1 ), - at least one safety contact pin ( 1.1.3 ) and - at least one electrical contact ( 1.1.2 ) with a receiving area ( 1.1.2.1 ) for receiving a corresponding electrical contact ( 2.1.1 ) of a charging plug ( 2 ), characterized in that - the protective contact pin ( 1.1.3 ) with a drive motor ( 1.3 ), by means of which the protective contact pin ( 1.1.3 ) relative to the socket housing ( 1.1.1 ), - the protective contact pin ( 1.1.3 ) with a thread ( 1.1.3.1 ) provided with a corresponding mating thread ( 2.1.2.1 ) a protective sleeve ( 2.1.2 ) of the charging plug ( 2 ) is operatively engageable, and - the receiving area ( 1.1.2.1 ) of the at least one electrical contact ( 1.1.2 ) towards a free end ( 1.1.2.2 ) is conically widening. Electric charging device ( 1 ) according to claim 1, characterized in that a receiving area ( 1.1.2.1 ) of the at least one electrical contact ( 1.1.2 ) limiting inner wall with a profiled surface ( 2.1.1.2 ) is provided. Charging plug ( 2 ) for connecting to a charging socket ( 1.1 ) an electrical charging device ( 1 ) according to one of the preceding claims, having - a plug housing ( 2.1 ), - the protective sleeve ( 2.1.2 ), which with the mating thread ( 2.1.2.1 ) and - the at least one corresponding electrical contact ( 2.1.1 ), which corresponds to the receiving area ( 1.1.2.1 ) towards a free end ( 2.1.1.1 ) is conically tapered. Electric charging device ( 1 ) according to claim 1 or 2 in combination with a charging plug ( 2 ) according to claim 3. Electric charging device ( 1 ) in combination with a charging plug ( 2 ) according to claim 4, characterized in that - for connecting the charging socket ( 1.1 ) with the charging plug ( 2 ) the plug housing ( 2.1 ) in the socket housing ( 1.1.1 ) is insertable, so that the at least one corresponding electrical contact ( 2.1.1 ) of the charging plug ( 2 ) positively in the receiving area ( 1.1.2.1 ) of the at least one electrical contact ( 1.1.2 ) of the charging socket ( 1.1 ) and - the connection between the charging plug ( 2 ) and the charging socket ( 1.1 ) is locked by means of a frictional connection, wherein the non-positive connection by means of activating the drive motor ( 1.3 ) and a resulting rotation of the at least one protective contact pin ( 1.1.3 ) relative to the socket housing ( 1.1 ) and relative to the protective sleeve ( 2.1.2 ) is made.

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