DE102017216783A1 - Charging socket for an electrically driven motor vehicle - Google Patents

Abstract

The invention relates to a charging socket (1) for an electrically driven motor vehicle for producing an electrical plug connection during a charging process. The charging socket (1) has a first plug-in area (11) for an AC charging plug (2) and a second plug-in area (12) for a DC charging plug (3). There is at least one locking device for locking an inserted charging plug (2, 3) with the charging socket (1). The invention proposes that each insertion region (11, 12) is assigned at least one locking element (23, 17) through which in the plug-in area (11, 12) plugged in charging plug (2, 3) is lockable, wherein an actuator (21) is present, through which both at least one of the first plug-in area (11) associated locking element (23) and at least one of the second plug-in area In this way, it is possible to provide a simple and inexpensive charging socket, which is suitable both for DC and for AC charging.

Description

The invention relates to a charging socket for an electrically driven motor vehicle having the features of the preamble of patent claim 1.

The charging of a traction battery for an electrically driven motor vehicle is possible both by means of alternating current (AC) and by means of direct current (DC). In both cases, for charging a corresponding, infrastructure-side charging plug is plugged into a corresponding, vehicle-side charging socket. During a charging process, a charging plug is to be locked with a charging socket. The lock is required by law for some applications. This should take into account safety aspects, on the other hand, this also prevents unintentional disconnection of the charging plug from the charging socket.

Charging by means of AC charging systems can be done on many existing AC outlets or charging stations, DC charging systems have the advantage that can be charged with much higher charging currents, with which a fast charging of a traction battery is possible.

The trend is therefore that the car manufacturers equip their electrically driven vehicles with combination charging sockets, which allow the insertion of both an AC charging plug and a DC charging plug.

In any case, however, a locking of the respective charging plug must be ensured in the charging socket.

From the DE 196 42 687 A1 is a locking device for securing a charging socket known. Specifically, a pivot cover is arranged on the charging socket, which is fixable by means of an actuatable by a switching signal actuator in such a position in which it covers a plugged into the charging socket charging plug and protects inextricably.

In the DE 10 2011 050 536 A1 a connector for electrically connecting an electric vehicle to a charging device is described. The connector has an activatable by an electrical pulse actuator for locking or unlocking the connector. Further, the connector is equipped with a power source for generating the electrical pulse. If the electrical pulse can not be generated by the charging device and / or by a vehicle battery associated with the electric vehicle, a switching device of the connector connects the energy source of the connector to the actuator. In this way it is possible to actuate the actuator even in case of failure of the electrical system.

Finally, that describes DE 10 2013 017 845 A1 an electrical connector for electric vehicles with a locking element which is coupled in terms of movement via a Bowden cable with an actuator. In particular, the locking element is integrally formed on the Bowden cable.

Prior to the cited prior art, the present invention is based on the object to provide a charging socket for an electrically driven motor vehicle with the features of the preamble of claim 1, which allows reliable locking both an AC charging plug and a DC charging plug and is constructed inexpensively.

The present object is achieved with a charging socket with the features of claim 1. Advantageous embodiments or developments of the invention can be found in the dependent claims.

The invention relates to a charging socket for an electrically driven motor vehicle for producing an electrical plug connection during a charging process. The electrically driven motor vehicle may be, for example, a hybrid vehicle or else a vehicle that can be driven purely electrically.

The charging socket has a first plug-in area for an AC charging plug and a second plug-in area for a DC charging plug. Furthermore, at least one locking device is provided for locking a respectively inserted, suitable charging plug with the charging socket.

The invention now proposes that each insertion region is assigned at least one locking element, by means of which a charging plug inserted in the plug-in region can be locked. In this case, a controllable actuator is provided by which both at least one of the first plug-in area associated locking element and at least one of the second plug-in area associated locking element can be brought either in a locking or in an unlocking position.

In this way, it is thus possible to accomplish a locking of charging plugs in both plug-in areas of the charging socket with only a single actuator. So it can At least one actuator can be saved, resulting in space and cost savings.

According to a first embodiment of the invention, the locking elements are simultaneously brought by the actuator either in a locking or in an unlocking position. This contributes to a simplification of the switching effort, since both locking elements are synchronized in this way in their movement. In addition, a second actuator can be saved.

In another advantageous embodiment of the inventive concept it is proposed that the actuator is arranged in the immediate vicinity of one of the plug-in areas and is coupled in terms of movement by means of a flexible actuating element to the at least one locking element which is assigned to the other of the plug-in areas.

As a result, a coupling of the different plug-in areas associated locking elements is possible even in unfavorable space, as a flexible actuator is easily adaptable to a variety of geometric conditions.

For example, it is conceivable that the actuator is arranged in the immediate vicinity of the plug-in area for a DC charging plug and is operatively connected via a trained as a Bowden cable flexible actuating element with the at least one locking element which is associated with the plug-in area for an AC charging plug.

In this way, a very simple, robust construction of the charging socket can be realized.

However, it is also conceivable to arrange the actuator in the immediate vicinity of the plug-in area for an AC charging plug and to bring about the designed as a Bowden cable, flexible actuator with the locking element in operative connection, which is associated with the plug-in area for the DC charging plug.

In another embodiment of the invention, the at least one locking element is pin-shaped and there is at least one charging socket side recess or opening into which the locking element engages in its locking position additionally. In this way, a particularly stable mounting of a locked charging plug in the charging socket is possible. Because the locking element of the charging socket engages not only locking in a through hole from the housing of the charging plug, but is additionally supported on the housing of the charging socket.

Finally, the invention also seeks protection for a motor vehicle which is equipped with a charging socket according to the invention.

There are AC and DC charging plugs with locking hooks. In charging plugs with locking hooks, both the AC and the DC charging plugs are blocked from being pulled out by a charging plug socket-side blocking device, which prevents unlocking of the charging plug-side locking hook. With charging plugs without locking hooks, a plug-type socket-side mounted, pin-like locking element moves into a normatively provided opening in the charging plug and thus prevents the withdrawal of the charging plug.

The invention can be used in both types of locking.

For charging plugs without locking hooks, a lever can still be present at the interface between the locking actuator and the actuating element designed as a Bowden cable, for example, which can unlock the locking element driven by the actuator into the locking position by actuation by means of a suitable tool. With this lever, e.g. in the case of a failure of the 12 V vehicle electrical system voltage, the charging plug can be unlocked manually

A preferred embodiment of the invention is illustrated in the figures and will be explained in more detail with reference to the figures in the following description. As a result, even further advantages of the invention become apparent. The same reference numerals, even in different figures, refer to the same, comparable or functionally identical components. In this case, corresponding or comparable properties and advantages are achieved, even if a repeated description or reference does not occur. The figures are not always to scale. In some figures, proportions may be exaggerated to more clearly highlight features of an embodiment.

• 1 ein elektrisch antreibbares Kraftfahrzeug mit einer erfindungsgemäßen Ladesteckdose,
• 2 die erfindungsgemäße Ladesteckdose mit der Verriegelungsvorrichtung für die Steckbereiche und
• 3 eine Prinzip-Schnittansicht gemäß Schnittverlauf III aus 2, für die Ausführung des Ladesteckers mit Verriegelungshaken.

It show, each schematically

• 1 an electrically driven motor vehicle with a charging socket according to the invention,
• 2 the charging socket according to the invention with the locking device for the plug-in areas and
• 3 a principle sectional view according to section line III from 2 , for the execution of the charging plug with locking hook.

In 1 is an electrically driven motor vehicle K seen. The car K is designed as a pure electric vehicle. It has an electric motor 7 in the engine operation with the electric energy of a traction battery 6 is available. Conversely, the traction battery 6 in generator mode (recuperation) by the electric motor 7 to be charged. However, the invention can also be applied to a plug-in hybrid vehicle in which the traction battery 6 can be charged both to a DC charger and to an AC charger.

Further, the motor vehicle K with a combined charging socket 1 equipped, which behind a cover flap 4 is arranged. The charging socket 1 is therefore suitable for the connection of both an AC charging plug and a DC charging plug. This will be explained in more detail below.

Purely exemplary is between the charging socket 1 and the traction battery 6 a suitable charger 5 interposed. The charger 5 starts and regulates a charging process in a suitable manner, so that, for example, overcharging or overheating of the traction battery 6 and thus their damage is excluded. It also serves to convert AC voltage to DC voltage if an AC charging plug is connected to the charging socket 1 connected. Notwithstanding the embodiment, it is also conceivable that the charger 5 On the infrastructure side, so for example in a charging station is maintained.

Based on 2 now becomes the charging socket 1 for an AC charging plug with locking hook and a DC charging plug without locking hook described in detail. The principle of the invention can also be applied to a combined charging socket without any locking hooks:

The charging socket 1 has a housing 10 on, which in the figure apparent upper part with a plug-in area 11 for an AC charging plug and in the lower area with a plug-in area 12 is provided for a DC charging plug.

The plug-in area 11 has in known manner an "AC mating face", which by energized inputs (phases) 13 and by a noncurrent input (neutral) 14 is marked. Further, as signal lines, protective earth or plug adjustment serving inputs are not quantified.

Equally, the plug-in area points 12 the well-known "DC mating face", with a current-carrying input 15 (Positive pole) and an input 16 , Furthermore, contact protection cylinders 15a and 16a It can be seen that the mentioned inputs 15 and 16 Protective surround and part of the housing 10 the charging socket 1 are. Other inputs serving the signal transmission or the plug adjustment are not quantified. This is not necessary for the understanding of the invention.

As already mentioned, the charging socket provides 1 now the option of either a DC charging plug in the plug-in area 12 or an AC charging plug into the plug-in area 11 to stick.

In the figure are contours of an inserted charging plug 3 for direct current. These are an inner contour of the housing 10 in the area of the entrances 15 and 16 or in the area of the contact protection cylinder 15a and 16a tracked. It can also be seen that on the outside of the housing 10 the charging socket 1 , in the immediate vicinity of the plug-in area 12 , a controllable actuator 21 is arranged. The actuator 21 is preferably controlled electronically by a suitable control device (not shown). But it is also conceivable to use an actuator which is controlled in other ways, for example hydraulically or pneumatically.

First, the actuator is used 21 now to the movement of a pin-like locking element 17 , The locking element 17 is shown in the figure in a locking position, in which it passes through a through hole 18 in the case 10 the charging socket 1 protrudes and into a through hole 30 from the housing of the charging plug 3 so immersed that the charging plug 3 no longer from the charging socket 1 can be pulled out.

It is even conceivable that the locking element 17 so far through the passage opening 30 protrudes until it is in a radial opening or recess 16b of the contact protection cylinder 16a intervenes. In this way, one is in the charging socket 1 plugged in charging plug 3 especially safe with the charging socket 1 locked.

As will be further apparent from the figure, the actuator is 21 about a flexible actuator 22 in movement with another locking element 23 coupled. The flexible actuator 22 is formed in the embodiment as Bowden cable, which also of a rubber-like protective cover 24 is surrounded. The locking element 23 is in the embodiment as the actuator 22 formed molded element.
The actuator not shown in detail 21 acts in such a way that it upon receipt of a suitable switching pulse by the associated control unit both the plug-in area 12 associated locking element 17 as well as the plug-in area 11 associated locking element 23 at the same time can bring either in a locking position (as shown) or in an unlocked position.

For example, instead of the charging plug 3 in the plug-in area 12 a charging plug for alternating current in the plug-in area 11 the charging socket 1 inserted, so prevents the locking element 23 in the illustrated locking position the movement of a plug connector-side locking hook 25 in a vertical direction of movement R2 ,

Such a direction of movement R2 However, it is necessary for the locking hook 25 an inserted AC charging plug 2 (Its housing is only indicated by dashed lines) via a pivot point S manually pivoted upwards and a hook-like projection 25a from an elongated groove 26 of the housing 10 can be moved out (see also 3 ).

So is a switching signal to unlock the actuator 21 sent, so is through the actuator 21 the locking element 17 in a horizontal direction of movement R1 to the right from the depression 16b and also from the passage opening 30 moved out.

The actuator 21 But it is also about the flexible actuator 22 so in movement with the locking element 23 coupled, that this simultaneously with an equally horizontal direction of movement R3 is brought to the right in a unlocking position (see. 23 ' ), in which the plug-side locking tab 25 has enough range of movement to the top. It can thus be raised and the plug 2 is from the charging socket 1 again deductible.

Notwithstanding the embodiment, it is also conceivable, instead of the actuator 21 an actuator on the other side of the mating area 12 , ie in the immediate vicinity of the live input 15 to arrange (indicated by dashed lines; 17 ' . 21 ' and 24 ' ,).

It is also conceivable to have an actuator in the immediate vicinity of the plug-in area 11 to arrange the one there the plug-in area 11 associated locking element can operate and the via a flexible actuator with a plug-in area 12 associated locking element is coupled in terms of movement.

Furthermore, in the 2 an emergency release device 21a seen. The emergency release device 21a For example, it may be formed as a lever that by actuation by means of a suitable tool (not shown) by the actuator 21 in the locked position driven locking element 17 can unlock. With this lever, for example, in the event of a failure of the 12 V vehicle electrical system voltage, the charging plug 3 be manually unlocked.

LIST OF REFERENCE NUMBERS

1

charging socket

2

Charging plug for AC

3

Charging plug for DC

4

cover flap

5

charger

6

traction battery

7

electric motor

10

Housing of the charging socket

11

Plug-in area for AC charging plug

12

Plug-in area for DC charging plug

13

live inputs (phases)

14

non-live input (neutral)

15

live input (positive pole)

15a

Berührschutzzylinder

16

non-live input

16a

Berührschutzzylinder

16b

deepening

17, 17 '

locking element

18

Through opening

21

actuator

21a

emergency unlocking

22

flexible actuator, Bowden cable

23, 23 '

locking element

24

protective coating

25

plug-side locking hook

25a

hook-like projection

26

elongated groove

30

Through opening

K

motor vehicle

R1, R2, R3

directions of movement

S

pivot point

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 19642687 A1 [0006]
• DE 102011050536 A1 [0007]
• DE 102013017845 A1 [0008]

Claims (7)

Charging socket (1) for an electrically driven motor vehicle (K) for producing an electrical plug connection during a charging process, wherein the charging socket (1) has a first plug-in area (11) for an AC charging plug (2) and a second plug-in area (12) for a DC charging plug (3) and at least one locking device for locking an inserted charging plug (2, 3) with the charging socket (1), characterized in that each insertion region (11, 12) is associated with at least one locking element (23, 17), by which a charging plug (2, 3) plugged into the plug-in area (11, 12) can be locked, wherein an actuator (21) is present, through which at least one locking element (23) associated with the first plug-in area (11) and at least one the second plug-in area (12) associated locking element (17) can be brought either in a locking or in an unlocking position. Charging socket (1) after Claim 1 , characterized in that the locking elements (17, 23) by the actuator (21) can be brought simultaneously either in a locking or in an unlocking position. Charging socket (1) after Claim 1 or 2 , characterized in that the actuator (21) in the immediate vicinity of one of the plug-in areas (11, 12) is arranged and via a flexible actuating element (22) with the at least one locking element (17, 23) is coupled in terms of movement, which is the other of the plug-in areas (11,12) is assigned. Charging socket (1) according to one of the preceding claims, characterized in that the actuator (21) in the immediate vicinity of the plug-in area (12) for a DC charging plug (3) is arranged and via a designed as a Bowden cable, flexible actuator (22) the at least one locking element (23) is in operative connection, which is associated with the plug-in area (11) for an AC charging plug (2). Charging socket (1) according to one of the preceding claims, characterized in that the actuator (21) at least one emergency unlocking device (21a) is provided, with which the locking elements (17, 23) can be brought manually into an unlocking position. Charging socket (1) according to one of the preceding claims, characterized in that at least one locking element (17) is pin-shaped and at least one charging plug socket-side recess (16b) or opening is present, in which the locking element (17) additionally engages in its locking position. Motor vehicle (K), characterized by a charging socket (1) according to one of the preceding claims.

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