Charging socket for a car charging connector

Abstract

The invention relates to a charging socket (1) for installation in a charging device for electric vehicles, wherein the charging socket (1) has an insulating body (2) and a plurality of contact elements (5, 5') arranged therein, wherein the contact elements (5, 5') each have a connection area (5a) for electrically contacting an end section of an electrical conductor and wherein the connection area (5a) is designed as a screw connection.

Description

[0001] The invention is based on a charging socket for a car charging connector according to the preamble of independent claim 1.

[0002] Such charging sockets are installed in particular in stationary wall boxes and / or charging stations, where electric cars or their energy storage devices can be charged. State of the art

[0003] DE 88 040 92 U1 shows a charging socket for an electric vehicle. When the battery of an electric vehicle is to be charged, a charger is connected to the on-board battery via a charging cable and a charging connector, and via the charging socket located on the vehicle body and accessible from the outside. When the charging plug is inserted into the charging socket, the power contacts of the charging socket engage with corresponding mating contacts of the charging plug and are electrically connected. The charging socket and charging plug also have connectors for signal lines, which are used to exchange control signals between the charger and the battery and the associated electronics in the vehicle.

[0004] The aforementioned charger is usually integrated into the electric vehicle. Charging sockets installed in electric cars must be able to withstand specific mechanical stresses. In particular, such charging sockets and the connection points of conductors and contact elements must be vibration-resistant. Task

[0005] The charger according to the invention is powered either by a wallbox, which is typically installed in a home environment, or by a charging station, which is generally located in public spaces. A charging cable for electric cars has charging connectors on both sides, with one charging connector plugged into the charging socket of the electric car and the other charging connector plugged into a charging socket of the wallbox or charging station.

[0006] The object of the invention is to provide a charging socket for a wallbox and / or a charging station that can be easily installed and produced cost-effectively.

[0007] The problem is solved by the subject matter of independent claim 1.

[0008] Advantageous embodiments of the invention are specified in the subclaims and the following description.

[0009] The charging socket according to the invention is intended for installation in a wallbox or charging station. The charging socket is also limited to this application, as it would not meet the requirements for installation in an electric car.

[0010] The charging socket according to the invention comprises an insulating body and a plurality of contact elements arranged therein. The contact elements each have a connection area for electrically contacting an end section of an electrical conductor. In other words, the electrical conductor is connected to the end section of the contact element. The connection area of ​​the contact element is designed as a screw connection.

[0011] The screw connection allows the contact element receptacles within the insulating body to be shorter and more compact than is possible with charging sockets for electric vehicles. This reduces the required installation space and simplifies the installation of the charging socket.

[0012] Preferably, the insulating body can be attached to a housing of the wallbox or charging station. For this purpose, the insulating body has, for example, screw openings through which the charging socket can be screwed to a housing wall.

[0013] Advantageously, the insulating body has contact receptacles, each of which houses a contact element. Due to the compact design of the contact elements, the contact receptacles can be designed to be correspondingly short—as seen in the axial direction of the charging socket—or compact.

[0014] Preferably, the contact elements each have a contact area provided for electrically contacting a corresponding contact element of a charging connector. The contact areas are each designed as a contact socket.

[0015] Preferably, a grub screw is provided at the connection area of ​​the contact element. The grub screw can be screwed in toward the insertion opening for the conductor end section. When screwed in, the grub screw engages a wire end ferrule, which is pushed onto the end section of the electrical conductor and crimped to it. This ensures a particularly reliable conductor connection.

[0016] The grub screws and cross holes in the insulating body also hold the contact elements in position, which means that an additional component and, for example, a retaining clip provided for this purpose in the insulating body can be omitted.

[0017] The contact elements are each arranged in individual chambers of the insulating body. They are separated from each other by partition walls to ensure good electrical insulation. This makes it possible to use wire end ferrules without insulating collars, which simplifies assembly overall.

[0018] Advantageously, the charging socket has at least two contact elements designed as power contact elements. The power contact elements are designed and intended for transmitting high currents. Furthermore, the charging socket has at least two contact elements designed as signal contact elements. The signal contact elements are designed and intended for transmitting control signals during the charging process. The wallbox and charger can communicate with each other via the signal contact elements, thus optimizing the charging process. Example

[0019] An embodiment of the invention is illustrated in the drawings and explained in more detail below. They show: Fig. 1 a perspective exploded view of a charging socket according to the invention.

[0020] Some of the figures contain simplified, schematic representations. Identical reference symbols are used for similar, but possibly not identical, elements. Different views of the same elements may be scaled differently. Directional references such as "left," "right," "top," and "bottom" are to be understood with reference to the respective figure and may vary in the individual illustrations relative to the object depicted.

[0021] The Fig. 1 shows a perspective exploded view of a charging socket 1 according to the invention.

[0022] The charging socket has an insulating body 2 which can be fixed to a housing wall of a charging station or a wall box (both not shown) via screw openings 3.

[0023] The insulating body 2 has contact receptacles 4, 4', in each of which a contact element 5, 5' is arranged. The contact receptacles 4, 4' are essentially cylindrical and have different diameters to accommodate different contact elements 5, 5'. The lower two rows of contact receptacles 4 are intended to accommodate the aforementioned power contact elements 5, whereas the upper row of contact receptacles 4' is intended to accommodate signal contact elements 5'.

[0024] The contact elements 5, 5' each have a connection area 5a for electrically contacting an end section of an electrical conductor (not shown). The connection area 5a has a hollow cylindrical opening into which the end section of the conductor is inserted. The end section of the conductor has previously been provided with a wire end ferrule.

[0025] The connection area 5a has a grub screw 6 that can be screwed radially into the hollow cylindrical conductor receptacle. By screwing in the screw, the conductor is electrically and reliably attached to the contact element 5, 5'.

[0026] The contact elements 5, 5' each have a contact area 5b, which is provided for electrically contacting a corresponding contact element of a charging connector (not shown). The contact area 5b is designed as a contact socket. This means that circumferential contact blades are provided, which are slightly bent radially inward, thus forming a receiving space for a contact pin.

[0027] Openings 7 are provided in the rear part of the insulating body 2, through which access to the grub screws 6 of the contact elements 5, 5' is possible. The grub screws 6 securely hold the contact elements 5, 5' in the insulating body 2.

[0028] Although various aspects or features of the invention are shown in combination in the figures, it will be apparent to those skilled in the art—unless otherwise stated—that the illustrated and discussed combinations are not the only possible ones. In particular, corresponding units or feature complexes from different embodiments can be interchanged. List of reference symbols 1 charging socket 2 insulating bodies 3 screw openings 4 Contact 5 Contact element 5a Connection area of ​​the contact element 5b Contact area of ​​the contact element 6 grub screw 7 Opening for grub screw 6 QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] DE 88 040 92 U1

[0003]

Claims

[1] Charging socket (1) for installation in a charging device for electric vehicles, wherein the charging socket (1) has an insulating body (2) and a plurality of contact elements (5, 5') arranged therein, wherein the contact elements (5, 5') each have a connection area (5a) for electrically contacting an end section of an electrical conductor and wherein the connection area (5a) is designed as a screw connection. [2] Charging socket (1) according to claim 1 characterized by that the insulating body (2) can be fastened to a housing of the charging device, in particular in the housing of a wall box or a charging station. [3] Charging socket (1) according to one of the preceding claims characterized by that the insulating body (2) has contact receptacles (4, 4') in each of which a contact element (5, 5') is arranged. [4] Charging socket (1) according to one of the preceding claims characterized bythat the contact elements (5, 5') each have a contact area (5b) for electrically contacting a corresponding contact element of a charging connector and that the contact area (5b) is designed as a contact socket. [5] Charging socket (1) according to one of the preceding claims characterized by that a grub screw (6) is provided on the connection area (5a) of the contact element (5, 5'), which, when screwed in, acts on a wire end sleeve which is pushed onto the end section of the electrical conductor and crimped thereto. [6] Charging socket (1) according to one of the preceding claims characterized bythat the charging socket (1) has at least two contact elements (5) which are designed as power contact elements and are provided for transmitting high currents and that the charging socket (1) has at least two contact elements (5') which are designed as signal contact elements and are provided for transmitting control signals during the charging process. [7] Charging socket (1) according to one of the preceding claims characterized by that the insulating body (2) has screw openings (3). [8] Charging socket (1) according to claim 5 characterized by that openings (7) are provided in the insulating body (2) for access to the grub screws (6).

Images