阅读说明：本技术 包含设于接触元件的接触片上的传感器装置的插式连接器部件 (Plug connector part comprising a sensor device arranged on a contact piece of a contact element ) 是由 托马斯·菲雷尔 于 2020-05-06 设计创作，主要内容包括：一种用于为电动车辆充电的插式连接器部件(5),包括至少一个电接触元件(52),其可沿插入方向(E)与对配插式连接器部件(4)的对配接触元件(40)连接并且具有数个成组将用于容置对配接触元件(40)的插口(522)围绕的接触片(521)。一个弹簧元件(526)布置在接触片(521)上,并且为了在接触片(521)上提供机械预紧而围绕插入方向(E)至少部分地将接触片(521)周向环扣。插式连接器部件(5)还包括用于检测被测变量的传感器装置(53),其布置在接触片(521)中的至少一个上并且通过弹簧元件(526)保持在所述接触片(521)中的至少一个上。(A plug connector part (5) for charging an electric vehicle comprises at least one electrical contact element (52) which can be connected in an insertion direction (E) to a mating contact element (40) of a mating plug connector part (4) and has a plurality of contact pieces (521) which surround groups of receptacles (522) for receiving the mating contact elements (40). A spring element (526) is arranged on the contact plate (521) and, in order to provide a mechanical pretension on the contact plate (521), the contact plate (521) is at least partially circumferentially looped around the insertion direction (E). The plug connector part (5) further comprises a sensor device (53) for detecting a measured variable, which is arranged on at least one of the contact pieces (521) and is held on at least one of the contact pieces (521) by a spring element (526).)

1. Plug-in connector part (5) for charging an electric vehicle, comprising at least one electrical contact element (52), the contact elements are connectable in an insertion direction (E) with mating contact elements (40) of a mating connector part (4) and have a plurality of contact strips (521) which surround groups of insertion openings (522) for receiving the mating contact elements (40), and comprising a spring element (526) which is arranged on the contact plate (521) and which, in order to provide a mechanical pretensioning, at least partially circumferentially buckles the contact plate (521) about the insertion direction (E), characterized by a sensor device (53) for detecting a measured variable, which is arranged on at least one of the contact pieces (521) and is held on the at least one of the contact pieces (521) by a spring element (526).

2. Connector part (5) according to claim 1, characterised in that the spring (526) exerts a pretensioning force radially inward with respect to the insertion direction (E) on the sensor device (53).

3. Plug connector part (5) according to claim 1 or 2, characterised in that the spring element (526) is placed in a groove (524) formed on the contact piece (521) which runs circumferentially around the contact piece (521).

4. Plug connector part (5) according to one of claims 1 to 3, characterised in that the spring element (526) has at least one coil which is wound around the contact piece (521) in the circumferential direction.

5. Connector part (5) according to claim 4, characterized in that the spring element (526) has a spring arm (527) which extends out of the at least one coil and a spring end (528) which is connected to the spring arm (527), wherein the spring end (528) acts on the sensor device (53).

6. Plug connector part (5) according to claim 5, characterised in that the spring arms (527) are placed in recesses (529) formed on one of the contact pieces (521) which extend longitudinally in the insertion direction (E).

7. Plug-type connector part (5) according to one of the preceding claims, characterised in that an accommodating groove (537) extending longitudinally in the plug-in direction (E) is formed on at least one of the contact tabs (521), in which accommodating groove the sensor device (53) is disposed.

8. Plug connector part (5) according to one of the preceding claims, characterised in that the sensor device (53) has a sensor element (530) and an electrically insulating housing (535) which surrounds the sensor element (530).

9. Plug connector part (5) according to claim 8, characterised in that the housing (535) is formed by a film tube.

10. Plug connector part (5) according to claim 8 or 9, characterised in that the sensor device (53) has a line inlet element (531) on which the sensor element (530) is arranged and which leads out of the housing (535) in an insertion direction (E).

11. Connector part (5) according to claim 10, characterised in that the line elements (521) are formed by a flexible printed circuit board.

12. Plug connector part (5) according to claim 10 or 11, characterised in that the sensor device (53) has a carrier element (534) which is enclosed in the housing (535) and which is arranged on the side of the wire inlet element (531) facing away from the sensor element (530).

13. Plug connector part (5) according to one of claims 10 to 12, characterised by a securing element (536) provided on the at least one contact element (52) which loops the contact piece (521) and secures the line inlet element (531) on the contact piece (521).

14. Plug connector part (5) according to one of claims 10 to 13, characterised in that the wire inlet element (531) has a bent section (532) which is placed in a recess (525) formed on the contact piece (521) which runs around the insertion direction (E).

Technical Field

The invention relates to a plug connector part for charging an electric vehicle according to the preamble of claim 1.

Background

Such a plug connector part can be designed, for example, as a charging plug for charging an electric vehicle and can be arranged, for example, on a charging cable connected to a charging station. However, such a plug connector part can also be used to implement a charging socket, for example on the side of an electric vehicle.

The plug connector part comprises at least one electrical contact element which can be connected in the plug-in direction with a mating contact element of a mating plug connector part and has a plurality of contact strips which surround groups of receptacles for receiving the mating contact elements. Spring elements are provided on the contact plates, which at least partially circumferentially loop the contact plates around the insertion direction in order to provide a mechanical pretensioning, and are also referred to as upper springs

This contact element is connected, for example, to a load line and, when a connection is established, serves, for example, to transmit a load current between the connector part and the corresponding mating connector part. In a charging operation for charging an electric vehicle, a charging current of a relatively high current intensity (for example 500A or even more) may flow, and therefore, in the charging operation, a temperature rise may occur in the charging system, in particular also on the plug-in connector part.

In this case, in particular, a temperature increase may also occur in the region of the contact elements of the plug connector part. Dirt or damage on the contact elements may lead to an increase in the contact resistance and thus to an increase in the heat loss during operation, which needs to be detected during the temperature monitoring of the plug-in connector part, so that damage to the plug-in connector part due to excessive temperature rise is prevented as far as possible.

In this case, the temperature of the contact element can be monitored without any time by measuring indirectly on a component at a distance from the contact element, for example on a charging cable. In the case of charging systems, for example, liquid-cooled devices may be provided on the charging cable and also on the components of the connector part itself, which achieve cooling during operation but do not extend to the contact pieces of the contact elements and therefore do not provide cooling directly on the contact pieces. By measuring the temperature on the cooled component, for example on the charging line, it is not possible to reliably infer a possible increase in temperature on the contact element, in particular on the contact piece of the contact element.

There is therefore a need for the following plug connector components: in the case of contact elements which carry a load current during operation and therefore can heat up during operation, the temperature measurement is carried out directly on such contact elements, whereby reliable temperature monitoring is achieved.

It should be noted here that the installation space in the plug connector part is generally limited, in particular in the region of the contact elements, so that the sensor device for detecting the temperature should have a smaller installation space requirement.

In the case of the electrical contact element disclosed in DE 102015115657B 3, an optical fiber is inserted into a groove located on the contact element. This optical fiber is constructed as a sensor and can be used, for example, for measuring temperatures.

In the case of the charging connector disclosed in DE 102016001572 a1, the sensor is arranged on the connection partner by means of a heat shrink tube.

WO 02/13330 a1 describes a plug connector having contacts which are sleeve-shaped or sleeve-shaped for receiving contact pins, wherein a temperature sensor is provided on at least one of the contacts.

Disclosure of Invention

The object of the invention is to provide a plug-in connector component for charging an electric vehicle, which allows a measured variable, in particular a temperature, to be detected on the contact strip of a contact element while making efficient use of the installation space.

The solution of the invention to achieve the above object is the subject matter with the features of claim 1.

The plug connector part has a sensor device for detecting a measured variable, which is arranged on at least one of the contact plates and is held on the at least one of the contact plates by a spring element.

The sensor device may in particular be adapted to detect a temperature. The sensor device may have a sensor element in the form of a temperature-sensitive resistor, for example, so that a temperature change at the contact plate can be inferred from a resistance change.

The sensor device is arranged on at least one of the contact pieces and is fixed on the contact piece by a spring element of the contact piece ring buckle. The spring element, which is also referred to as an upper spring, serves on the one hand to provide a resilient pretensioning on the contact plate, in particular to achieve a (sufficient) contact normal force (kontaktnormal) between the contact plate and a counter-mating contact element, which is designed, for example, as a contact pin, in the connected state of the contact plate with the corresponding counter-mating contact element. On the other hand, the spring element serves as a fixing member for fixing the sensor device to the contact piece. In order to provide a pretensioning force on the contact strip, a spring element must be provided, and since this spring element is also used for fastening the sensor device, the number of components is reduced and the installation space required for the sensor device is also smaller.

Since the sensor device is arranged directly on the contact strip, the sensor device can directly record the measured variable, in particular the temperature, on the contact strip, thereby enabling temperature monitoring on the contact strip. In this way, possible temperature increases on the contact strip can be detected substantially without delay and accurately, so that countermeasures, such as interruption or modification of the charging operation, can be taken in the event of a fault. This makes it possible to monitor the temperature, in particular in the region of the contact points, at which the contact lugs make electrical contact with the mating contact elements.

The spring element is thus used to secure the sensor device to the contact patch. In this case, the sensor device can be placed against a single contact strip. The sensor device can however also rest against several contact pads simultaneously.

In one embodiment, the spring element provides a radially inward pretensioning force with respect to the insertion direction, which acts on the sensor device and presses the sensor device against the corresponding contact plate. In this way, the spring element ensures that the sensor device abuts against the corresponding contact piece, and the temperature on the corresponding contact piece can be recorded.

The spring element, which extends circumferentially around the contact piece of the contact element, can have, for example, one or several coils and is formed, for example, by a spring wire. The spring element can, for example, be arranged in a groove formed on the contact plate, which groove runs around the contact plate in the circumferential direction of the contact plate in the insertion direction, and thereby the contact plate can be snapped around, so that a radially inward pretensioning force is provided on the contact plate, which pretensioning force serves to adjust the contact force during the plug-in connection with a corresponding mating contact element. The recess may be formed, for example, in the region of the free end of the contact piece. The contact piece can project from the shaft section of the contact element, for example, in the insertion direction, and can carry a spring element at its free end, so that the spring element provides a radially inward pretensioning force in the region of the free end, which counteracts the expansion of the contact piece.

In one aspect, the spring element has a spring arm extending from the coil and a spring end connected to the spring arm. The spring arm can, for example, extend in the insertion direction from a coil which is wound around the contact plate in the circumferential direction and carries a spring end on the end facing away from the coil, which spring end can, for example, be angled by approximately 90 ° relative to the spring arm and act on the sensor device in order to secure the sensor device on the contact plate. In this case, the spring ends can be bent, for example, in order to act on the sensor device and to apply a radially inward pretensioning force to the sensor device.

In one solution, one of the contact pieces has a recess which extends longitudinally in the insertion direction, and the spring arm is placed in this recess. The recess forms an anti-rotation element for the spring element on the contact strip and in particular prevents the spring arm from sliding in the circumferential direction, thus ensuring that the sensor device is fixed by the spring end provided on the spring arm. The recess may be formed, for example, as a milled groove on the outer side of one of the contact pieces, wherein the recess may also be formed between two adjacent contact pieces and may thus extend over two adjacent contact pieces.

In one technical scheme, a containing groove extending along the inserting direction is formed on a contact piece provided with a sensor device, and the sensor device is arranged in the containing groove. The receiving grooves are formed outside the corresponding contact pieces and receive the sensor devices, so that the sensor devices are at least partially embedded in the corresponding contact pieces, and the additionally required structural space of the sensor devices is further reduced. Furthermore, the sensor device is accommodated in a defined position on the corresponding contact piece by being accommodated in the accommodating groove and is locked in particular in the circumferential direction on the contact piece, wherein the sensor device is also locked in particular in the radial direction by the spring element and is thus held on the contact piece.

In one embodiment, the sensor device has a sensor element and an electrically insulating housing which surrounds the sensor element. The sensor element may, for example, be formed by a temperature-sensitive resistor, wherein such a resistor may have a negative temperature coefficient (NTC resistor) or a positive temperature coefficient (PTC resistor). The housing encloses the sensor element and may for example consist of a thin-film tube with a relatively small wall thickness, for example with a wall thickness between 0.01mm and 0.1 mm. The housing is electrically insulating and also sufficiently voltage-resistant, so that even a large voltage, for example even 1000V, across the contact element does not lead to a voltage breakdown of the sensor element. The housing is thermally conductive, so that the temperature increase occurring at the corresponding contact element can be registered and detected by the sensor element.

In one embodiment, the sensor device has a line element, which is formed, for example, by a flexible printed circuit board, and the sensor element is arranged on this line element. The line inlet element can have one or several line inlets for the sensor element and can be led out of the housing at one end, for example, in the plug connector part, in order to make electrical contact with a superordinate electrical or electronic component, for example, a signal contact, whereby temperature monitoring is effected on the contact element.

The line inlet element may, for example, extend in the form of a strip and carry the sensor element. The housing encloses the sensor element and the line inlet element, wherein the line inlet element can be guided out of the housing in the insertion direction in order to connect the sensor element to the superordinate electrical component.

In one embodiment, the sensor device has a carrier element, which is also enclosed in the housing and is arranged on the side of the line inlet element facing away from the sensor element. The carrier element serves to mechanically stabilize the sensor device, in particular in the region of the sensor element, so that the pretensioning force provided by the spring element is transmitted to the sensor element and is caused to act on the sensor element in a manner radially toward the corresponding contact piece.

In one embodiment, the contact element has a fastening element, for example in the form of an elastically deformable annular element, for example an elastomer ring, which is arranged on the contact strip in such a way that the fastening element circumferentially buckles the contact strip. The fastening device can be used, for example, for fastening the line inlet element on the contact plate and is arranged in a recess formed on the contact plate, which recess surrounds the insertion direction. The recess is formed, for example, on the ends of the contact pieces facing away from the free ends, and the contact pieces are connected at these ends, for example, with solid rod sections of the contact element.

The fastening element can cause the fastening of the line inlet element as follows: the fastening element loops the line element, for example formed by a flexible printed circuit board, thereby holding it on the contact strip. The line inlet element can have, for example, a curved section which is arranged in a recess formed on the contact plate and which runs around the insertion direction.

Plug-in connector parts of the type mentioned can be used, for example, as charging plugs for charging systems for charging electric vehicles. Such a plug connector part can be arranged, for example, on a charging cable and be connected to a charging station via the charging cable. For example, the plug connector part can be plug-connected to a corresponding mating plug connector part in the form of a charging socket on the electric vehicle side.

However, the plug connector part can also be embodied as a charging socket, for example on the side of an electric vehicle.

Furthermore, the plug connector part can also be used in other applications in which a particularly high current is to be transmitted.

Drawings

The basic idea of the present invention will be described in detail below with reference to the embodiments shown in the drawings. Wherein:

fig. 1 is a schematic view of an electric vehicle (electric vehicle) having a charging cable and a charging station for charging;

FIG. 2 is a view of an embodiment of a plug connector member in the form of a charging plug for charging an electric vehicle;

FIG. 3 is a side view in partial cross-section of the male connector part as shown in FIG. 2;

FIG. 4 is an enlarged view of section A of FIG. 3;

FIG. 5 is an isolated view of a contact element of the male connector part comprising a sensor device provided on the contact element;

FIG. 6 is a side view of the contact element;

FIG. 7 is an exploded view of the contact element;

FIG. 8 is a front view of the contact element;

FIG. 9 is an enlarged view of section B of FIG. 8;

fig. 10 is an isolated view of a spring element arranged on a contact piece of a contact element;

fig. 11 is an enlarged view of the contact element in the region of the free end of the contact plate, wherein the spring element provided on the contact plate is not shown;

fig. 12 is a view of the contact strip in the region of its free end, wherein the spring element and the sensor device provided on the contact strip are shown; and

fig. 13 is a cross-sectional view of a fixing element arranged on the contact piece for fixing the line inlet element.

Detailed Description

Fig. 1 is a schematic view of a vehicle 1 in the form of a motor-driven automobile (also referred to as an electric vehicle). The electric vehicle 1 has a rechargeable battery for powering the motor, thereby moving the vehicle 1.

To charge the battery of the vehicle 1, the vehicle 1 may be connected to a charging station 2 through a charging cable 3. For this purpose, a charging cable 3 can be plugged at one end into a mating connector part 4 in the form of a corresponding charging socket of the vehicle 1 by means of a connector part 5 in the form of a charging plug, and said charging cable is connected at its other end to the charging station 2, for example, in such a way that a further charging plug 6 is electrically connected to a mating connector part 20 in the form of a charging socket on the charging station 2. The charging current having a relatively large current intensity is transmitted to the vehicle 1 through the charging cable 3.

Fig. 2 shows an exemplary embodiment of a plug connector part 5 which is arranged on the charging cable 3 and can be plugged, for example, into a mating plug connector part 4 in the form of a corresponding charging socket on the vehicle 1 side. The plug connector part 5 has a housing 50, on which plug sections 500, 501 are formed, in the region of which contact elements 51, 52 are provided for plug connection with corresponding mating contact elements of the mating plug connector part 4.

In the exemplary embodiment shown, the contact elements 51 located in the region of the upper plug section 500 serve as signal contacts for transmitting control signals. The contact elements 52 on the lower plug section 501 are used to transmit a charging current in the form of a direct current for charging a vehicle battery of the vehicle 1.

Since the load current to be transmitted may have a high amperage (e.g. 500A or even higher), during operation of the charging system, a temperature rise may occur on different components of the charging system, e.g. on the charging cable 3 and on the plug connector part 5. In order to suppress such a temperature increase, active cooling means, for example in the form of liquid cooling, can be provided on charging cable 3 and on plug connector part 5, which can absorb and dissipate heat on charging cable 3 and on plug connector part 5, so that excessive temperature increases on charging cable 3 and on plug connector part 5 are prevented.

In this case, such a cooling element can extend as far as the load contact element 52, but it is not possible to directly cool the contact plates of the sleeve-like contact element 52 inserted into the plug-in projection (Steckdome)502 located inside the lower plug-in section 501.

However, particularly on the contact element 52, a temperature rise may occur during operation. Under normal operating conditions, the electrical resistance between the contact elements 52 of the plug connector part 5 and the corresponding mating contact elements of the mating plug connector 4 is generally low, whereas, for example in the case of contamination or damage to the contact elements 52 or the mating contact elements, this electrical resistance increases significantly, which can lead to a considerable increase in the temperature rise at the contact elements 52.

There is therefore a need for temperature monitoring directly in the region of the contact strips of the contact element 52, wherein the installation space provided in the region of the contact strips in the plug-in projection 502 is small, so that only a small installation space is available for this temperature monitoring.

As shown in fig. 3 in a side view and in fig. 4 in an enlarged sectional view, in combination with the individual views of the contact element 52 according to fig. 5 to 7 for one embodiment, it can be seen that the contact element 52 is placed in the corresponding plug projection 502 by means of a contact tab 521 extending from a rod section 520. Here, each contact element 52 can be connected in the insertion direction E to a mating contact element 40 in the form of a corresponding contact pin (see fig. 4) by inserting the mating contact element 40 in the form of a contact pin into the receptacle 522 formed by the contact plate 521 and then receiving it in the receptacle 522.

The contact plates 521 extend in the insertion direction E from the cylindrical shaft section 520, wherein adjacent contact plates 521 are separated from one another by a slot. In the inserted state, the contact plate 521 is in contact with the mating contact element 40, wherein the contact plate 521 is at least slightly elastically deflectable and in the inserted state rests against the mating contact element 40 with an elastic pretension (contact normal force).

In order to provide a defined normal contact force for the contact between the pin contact piece 521 and the counter-mating contact element 40 designed as a contact pin in the inserted state, a spring element 526, which is made of a coiled spring wire and which buckles the contact piece 521 on the outside in the circumferential direction around the insertion direction E, is provided in the region of the free end 523 of the contact piece 521 facing away from the shaft section 520, as shown, for example, in fig. 5 and 6.

The spring element 526, which is also referred to as an upper spring, has, for example, more than one winding, for example, approximately two windings, and is seated in a recess 524 formed on the contact piece 521, which is circumferential in the insertion direction E, and is thereby held axially on the contact piece 521. The spring element 526 exerts a radially inward pretensioning force on the contact piece 521, and thereby elastically dampens the expansion of the contact piece 521, so that the contact piece 521 is ensured by the spring element 526 to bear with sufficient pretensioning force on the inserted mating contact element 40.

In the embodiment shown in the figures, a sensor device 53 is provided on the contact element 52, which is suitable for detecting a measured variable, in particular a temperature, on the contact strip 521.

In the exemplary embodiment shown, the sensor device 53 has a sensor element 530 in the form of, for example, a temperature-sensitive resistor, which is arranged on a line element 531 in the form of, for example, a flexible printed circuit board and is enclosed together with a carrier element 534 in a housing 535.

As shown in fig. 8 and 9, the sensor element 530 is arranged on a side of the wire inlet element 531 facing the corresponding contact piece 521. The carrier element 534 is then located on the side of the line inlet element 531 facing away from the contact plate 521 and serves to mechanically stabilize the sensor device 53.

The housing 535 circumferentially surrounds the sensor element 530, the line feed element 531 and the carrier element 534 and is formed, for example, from a thin-film tube with a small wall thickness, for example, a wall thickness of a few hundredths of a millimeter. The housing 535 is electrically insulating and has a sufficient voltage resistance, so that even if the voltage across the contact element 52 is high, no voltage breakdown of the sensor element 530 located in the housing 535 will occur.

The housing 535 is circumferentially closed and also closed at its ends, so that the sensor element 530 is enclosed in a moisture-tight manner within the housing 535.

As can be seen in particular from fig. 5 and 6, the line inlet element 531, for example in the form of a strip, consisting of a flexible printed circuit board, is led out of the housing 535 at one end and is insulated from the housing 535 in such a way that moisture is prevented from entering the interior of the housing 535. The line feed element 531 is accommodated in a recess 525 by means of a curved section 532, which is formed on the contact plate 521 in the region of the end facing the rod section 520 and circumferentially surrounds around the insertion direction E and communicates with a connection section 533, by means of which the sensor device 53 can be connected to a superordinate electrical or electronic component, for example a signal contact 51, for temperature monitoring.

From fig. 5 to 7, in combination with fig. 13, it can be seen that in the region of the recess 525, the fixing element 536 extends around the contact piece 521. In the shown embodiment the fastening element 536 is formed by an elastomer ring and is intended to act on the curved section 532 of the wire inlet element 531, thereby fastening the wire inlet element 531 to the contact plate 521.

The sensor device 53 is disposed in a receiving groove 537 formed on one of the contact pieces 521 and extending outside the corresponding contact piece 521 in the insertion direction E, and is held in the receiving groove 537 by a spring member 526, and is thereby held on the contact member 52. As shown in fig. 10 and 12, the spring element 526 has spring arms 527 that project axially in the insertion direction E from the coils of the spring element 526 and that carry curved spring ends 528 that face away from the coils and are angled with respect to the spring arms 527. As can be seen from fig. 11 in conjunction with fig. 12, in the installed position (fig. 12), the spring arm 527 rests in a recess 529 formed on one of the contact lugs 521 and, by means of the spring end 528, catches the sensor device 53 resting in the receiving groove 537 of the respective contact lug 521 from above, so that the sensor device 53 is fixed to the respective contact lug 521 by means of the spring element 528. Since the spring arms 527 are seated in the recesses 529, the spring elements 526 are locked circumferentially against rotation, so that the spring arms 527 cannot slide in particular circumferentially and the spring ends 528 cannot disengage from the sensor device 53.

Since the spring end 528 externally loops the sensor device 53 and acts radially on the sensor device 53, the spring element 526 presses the sensor device 53 elastically with the spring end 528 provided on the spring arm 527, so that it abuts against the corresponding contact piece 521. In this way, as is shown in particular in an enlarged view in fig. 9, the (thermally conductive) housing 535 is brought into abutment against the corresponding contact piece 521 and a thermal connection of the sensor element 530 to the contact piece 521 is established.

The sensor device 53 is thereby fixed to the contact plate 521 by means of a spring element 526 (which also serves to bias the contact plate 521 against force). In the event of a deflection of the contact plate 521 during the plug-in connection with the mating contact element 40, the sensor device 53 can be moved unhindered by the spring arm 527 and the spring end 528 provided thereon.

Since the sensor device 53 is arranged on the corresponding receiving groove 537 on the contact plate 521 and the sensor device 53 is fixed to the contact plate 521 by means of the spring element 526, which is a device that must be provided, almost no additional space requirement is created by the sensor device 53 in the region of the contact plate 521. Therefore, the sensor device 53 does not collide with the insertion projection 502 (see fig. 3 and 4) accommodating the contact piece 521, so that temperature monitoring can be performed directly on the contact piece 521 during operation.

The basic idea of the invention is not limited to the embodiments described above but may be implemented in other ways as well.

The sensor device can be arranged as described on one or several contact elements of the plug connector part. Preferably, a sensor device of the type mentioned can be provided in particular on each contact element for transmitting a load current during operation.

The sensor device can be used for detecting a temperature, wherein the sensor device has a sensor element in the form of, for example, a temperature-sensitive resistor, which in turn generates a measurement signal or at least contributes to the generation of a measurement signal. In principle, however, other measured variables can also be recorded.

Plug connector parts of the type described can be used advantageously for charging electric vehicles, wherein other applications are also conceivable.

Description of the reference numerals

1 vehicle

2 charging station

20 pairs of plug-in connector parts (charging socket)

3 charging cable

4 pairs of plug-in connector parts (charging socket)

40 pairs of mating contact elements

5.6 plug-in connector component (charging plug)

50 casing

500, 501 plug section

502 inserting projection

51 contact element (Signal contact)

52 contact element (load contact)

520 pole segment

521 contact sheet

522 socket

523 end portion

524 groove

525 recess

526 spring element (Upper spring)

527 spring arm

528 end part

529 recess

53 sensor device

530 sensor element

531 incoming line element

532 curved section

533 a connecting section

534 bearing element

535 casing

536A fixture element

537 accommodating groove

E the insertion direction.