Plug connection for a charging system for charging an electric vehicle

Abstract

The invention relates to a plug connector (5) for a charging system for charging an electric vehicle (4), comprising: a first housing part (503), which is designed with a plug section (501) for plug connection to a mating plug connector (3); a second housing part (504) connected to the first housing part (503); at least one plug contact (51A, 51B) arranged on the first housing part (501) for electrically contacting a mating contact element (31) of a mating plug connector (3); a sealing element (54) having a first sealing section (540) which seals a transition between the first housing part (503) and the second housing part (504) in a moisture-proof manner; and a temperature sensor assembly (55) having a temperature sensor (550). The sealing element (54) has a second sealing section (541A, 541B) which is connected to the first sealing section (540) and which seals a transition between the first housing part (503) and the at least one plug contact (51A, 51B) in a moisture-proof manner, and wherein the temperature sensor (550) is arranged on the sealing element (54) in order to measure a temperature rise at the at least one plug contact (51A, 51B).

Description

Technical Field

[0001] The invention relates to a plug connection for a charging system for charging an electric vehicle according to the preamble of claim 1 , and a charging system for charging an electric vehicle. Background Art

[0002] Such plug connectors include a first housing part, which is configured with a plug section for plug-in connection with a mating plug connector. A second housing part is connected to the first housing part. At least one plug contact is arranged on the first housing part, which is used to make electrical contact with a mating contact element of the mating plug connector. The sealing element has a first sealing section, which seals the transition between the first housing part and the second housing part in a moisture-tight manner. The temperature sensor assembly has a temperature sensor for measuring the temperature rise at the at least one plug contact.

[0003] Such plug connectors can be designed in particular as charging sockets and arranged on the electric vehicle. With such charging sockets, a mating plug connector in the form of a charging plug arranged on a charging cable can be connected in order to establish an electrical connection between the charging station and the electric vehicle in this way and to electrically charge the electric vehicle.

[0004] In the field of electric vehicles, it is desirable to charge the electric vehicle quickly and efficiently in order to reduce the charging time and the driving interruption time associated therewith. In order to achieve rapid charging of electric vehicles within the scope of a fast charging process, high charging powers are used, which result in large charging currents, for example current strengths of 700 A or even more.

[0005] The structure and dimensions of the electrical contact elements on plug-in connectors for charging electric vehicles are usually standardized. Therefore, the contact geometry on such plug-in connectors cannot be scaled arbitrarily in order to achieve the greatest possible current carrying capacity on the contact elements.

[0006] The challenge is to achieve the highest possible power transfer with existing contact geometries.

[0007] When transmitting high charging currents, the contact elements and other components of the plug connector heat up. It is stipulated that the temperature rise at the plug connector must not exceed 50 K. Therefore, if high charging currents are used, it should be ensured that the plug connector does not heat up excessively.

[0008] For the reasons mentioned above, a temperature monitoring device is provided in the plug-in connection of the type discussed here, which is used to monitor the temperature increase at the corresponding plug-in contact by means of a temperature sensor assembly. Depending on the temperature increase at the plug-in contact, countermeasures can be introduced in this way as soon as the temperature increase approaches a permissible limit or exceeds this limit.

[0009] As a countermeasure when an excessive temperature rise is detected, a circuit breaker is usually introduced during the charging process using a charging current in the form of an alternating current, within the scope of which the charging current is completely cut off and the charging process is thus interrupted as soon as the permissible limit is exceeded. In contrast, during the charging process using a charging current in the form of a direct current, the charging current is usually adjusted to be reduced before the permissible limit is reached, so that the temperature rise approaches the permissible limit but does not exceed the permissible limit. In this case, the more accurately the temperature measurement is carried out, the more accurately the charging current can be adjusted, so that the temperature rise is limited to a permissible extent, and the maximum possible charging current is transmitted despite being within the permissible temperature rise range, and thus efficient charging of the electric vehicle is achieved.

[0010] When measuring the temperature on the plug contacts, it is desirable on the one hand to detect the temperature on the plug contacts as accurately as possible and with a short time delay. In addition, however, it should be ensured that the temperature sensor assembly is reliably electrically insulated from the corresponding plug contact even at the high voltages that are common in charging systems, so that no voltage flashover occurs between the plug contact and the temperature sensor assembly.

[0011] In the temperature detection device for a plug connection disclosed by DE 10 2020 126 192 A1, a latching element is arranged on a contact element. A sensor holder is arranged on the latching element, which fixes the temperature sensor on the latching element.

[0012] In the case of the plug connection known from EP 3 402 012 A1, the temperature sensor is connected to the corresponding plug contact via a heat-conducting element made of silicone. Summary of the invention

[0013] The object of the present invention is to provide a plug connection which allows reliable temperature measurement with reliable electrical insulation between the temperature sensor element and the associated plug contact.

[0014] This object is achieved by the subject matter having the features of claim 1 .

[0015] The sealing element thus has a second sealing section connected to the first sealing section, which seals the transition between the first housing part and the at least one plug contact in a moisture-tight manner. A temperature sensor is arranged on the sealing element in order to measure a temperature increase at the at least one plug contact.

[0016] The plug connector is designed for use on a charging system for charging an electric vehicle. The plug connector can be designed, for example, by a charging socket that is arranged on the electric vehicle and can be plug-connected to a corresponding mating plug connector in the form of a charging plug on a charging cable coupled to the charging station.

[0017] The plug connector has a housing which comprises two housing parts which are attached to one another and in the interior of which components of the plug connector are accommodated, for example connection components for connecting plug contacts to corresponding electrical connection lines or control components such as printed circuit boards, etc. The housing parts thus form an interior which is sealed to the outside, thereby preventing moisture from entering the housing interior of the plug connector from the exterior of the plug connector during operation.

[0018] To seal the transition between the first housing part and the second housing part, a sealing element is provided which is arranged with a first sealing section between the first housing part and the second housing part such that moisture cannot penetrate between the first housing part and the second housing part into the interior of the plug connector.

[0019] In addition, the sealing element also serves to seal the transition between the first housing part and the at least one plug contact in a moisture-tight manner. For this purpose, the sealing element has a second sealing section, which occupies the interlayer between the section of the first housing part and the at least one plug contact and thereby seals the transition between the plug contact and the first housing part. The at least one plug contact can thus extend through the first housing part, for example into the region of the plug section formed on the first housing part, so that the at least one plug contact can be plug-connected to a corresponding mating contact element of a mating plug connector in order to connect the plug connector to the mating plug connector. The second sealing section thus prevents moisture from being able to enter the interior of the plug connector from the region of the plug surface, which is formed on the plug connector by the at least one plug contact.

[0020] The sealing element with the first sealing section and the second sealing section is preferably formed integrally and in one piece from associated parts. In any case, the first sealing section and the second sealing section are connected to each other so that the first sealing section and the second sealing section are linked together. This results in a sealing element that can be easily mounted between housing parts to provide a sealing effect.

[0021] The sealing element performs a sealing function by means of a first sealing section and a second sealing section, so as to seal the interior of the housing formed by the first housing part and the second housing part relative to the outside. In addition, a thermally conductive connection is established between the temperature sensor assembly and at least one plug contact by means of the sealing element, in that a temperature sensor of the temperature sensor assembly is arranged on the sealing element and heat is thus received by the sealing element on the at least one plug contact. Therefore, the sealing element also serves to conduct heat from the at least one plug contact, on which the sealing element rests for sealing, to the temperature sensor assembly, so that heat can be received and measured at the temperature sensor of the temperature sensor assembly.

[0022] In one embodiment, the sealing element is made of a soft elastic material, in particular a rubber material or a silicone material. The sealing element can be made of a common silicone material, for example a common sealing silicone.

[0023] Advantageously, the silicone material can have increased temperature resistance, for example temperatures greater than 200°C, preferably greater than 500°C.

[0024] In one design, the sealing element is made of an elastic plastic material, such as a silicone material containing a ceramic filler. By using a ceramic filler, the thermal conductivity of the elastic plastic material can be increased while ensuring good electrical insulation. The thermal conductivity can be, for example, greater than 1.5 W / mK, such as greater than 2.0 W / mK, preferably greater than 3.0 W / mK, and more preferably greater than 5.0 W / mK.

[0025] As ceramic fillers, aluminum oxide, aluminum nitride or boron nitride, for example, can be used, which are mixed in particulate form with the silicone matrix.

[0026] Silicone materials in the form of thermally conductive silicone-rubber compositions are described, for example, in EP 1 331 248 B1 and can be used for sealing elements.

[0027] In one embodiment, the first sealing section is arranged between a first edge section of the first housing part and a second edge section of the second housing part and thereby seals the transition between the first housing part and the second housing part in a moisture-tight manner. The housing parts are preferably attached to one another via their edge sections in such a way that the first sealing section of the sealing element occupies the gap between the first edge section and the second edge section and thereby seals the transition between the first edge section and the second edge section in a moisture-tight manner. Moisture cannot therefore pass between the first edge section and the second edge section into the interior of the housing of the plug connector, which is enclosed by the first housing part and the second housing part.

[0028] In one embodiment, the first sealing section extends along an extension curve, along which the first edge section and the second edge section are attached to each other, with the first sealing section occupying the interlayer. The first sealing section is preferably closed in the circumferential direction along the extension curve, so that the sealing section forms a circumferentially closed ring, which seals the transition between the edge sections of the housing parts along the extension curve in a moisture-tight manner. The first sealing section, which is closed in the circumferential direction, thus follows the extension curve, along which the edge sections of the housing parts are attached to each other and occupy the interlayer between the edge sections of the housing parts. By connecting the housing parts to each other, the first sealing section is preferably compressed at least to a certain extent, so that the sealing effect of the first sealing section is reliably established between the edge sections of the housing parts.

[0029] In one embodiment, at least one plug contact has a shaft section extending along the longitudinal axis, around which the second sealing section extends. The shaft section can, for example, have a cylindrical shape, whose cylinder axis extends along the longitudinal axis. The second sealing section surrounds the shaft section and occupies the intermediate layer between the shaft section and the first housing part, so that the transition between the shaft section and the first housing part is sealed by the second sealing section of the sealing element.

[0030] In one embodiment, at least one plug contact extends through the first housing part along the longitudinal axis. In particular, the at least one plug contact can extend from the interior of the housing of the plug connector, which is enclosed by the first housing part and the second housing part, through the first housing part to the outside, for example, into the region of a plug section formed on the first housing part, so that for the plug connector to be plugged in and connected to a corresponding mating plug connector, the at least one plug contact can be in plugged, electrically contacting connection with a corresponding mating contact of the mating plug connector on the outside of the first housing part. In this case, the second sealing section prevents moisture from being able to pass between the plug contact and the first housing part and into the interior of the housing of the plug connector.

[0031] In one embodiment, at least one plug-in contact is accommodated in a receiving dome formed on the first housing part. The second sealing section is arranged between the shaft section and the receiving dome, viewed radially with respect to the longitudinal axis. The receiving dome can in particular have the shape of a cylindrical sleeve, which extends around the shaft section of the plug-in contact. Here, the second sealing section occupies the sandwich between the shaft section and the receiving dome, so that the second sealing section is arranged between the shaft section and the receiving dome, viewed radially with respect to the longitudinal axis. The second sealing section thus acts as a radial seal in that the second sealing section surrounds the shaft section of the corresponding plug-in contact in the circumferential direction and is further embedded in the receiving dome of the first housing part. The second sealing section is preferably compressed here to such an extent that the transition between the receiving dome and the shaft section is reliably sealed by the second sealing section.

[0032] The plug connector can have, for example, a plurality of plug contacts, for example two plug contacts for transmitting a charging current in the form of a direct current. In this case, each plug contact is provided with a second sealing section, which is respectively connected to the first sealing section of the sealing element. In this case, each plug contact can (also) be provided with a temperature sensor assembly having a temperature sensor, so that the temperature can be measured at each plug contact.

[0033] In one embodiment, the second sealing section is connected to the first sealing section via the connecting section. In this case, the first sealing section and the second sealing section are preferably formed integrally and in one piece with the connecting section, so that a related, integral sealing element is obtained.

[0034] The connecting section can, for example, have the structure of a web which connects a first sealing section, which is situated radially outside the second sealing section and is preferably closed in the circumferential direction, to the second sealing section.

[0035] For example, the sealing element can have a plurality of connecting sections, wherein each second sealing section is connected to an outer surrounding first sealing section via one or more connecting sections. For example, each plug contact can be provided with a second sealing section, which is connected to the first sealing section via one or more connecting sections.

[0036] The first sealing section, the second sealing section and the connecting section can be made of the same material or, for example, of different materials using a two-component plastic injection molding technique.

[0037] In one embodiment, the temperature sensor is arranged on the sealing element in the region of the second sealing section in order to measure the temperature rise at the at least one plug contact. If the plug connector has a plurality of plug contacts and each plug contact is provided with a second sealing section for sealing the transition between the respective plug contact and the first housing part, a temperature sensor can be arranged in the region of each second sealing section in order to be able to detect the temperature at each plug contact.

[0038] For example, the sealing element has a temperature acquisition section connected to the second sealing section, on which the temperature sensor is arranged. The temperature acquisition section protrudes radially from the second sealing section, for example, in that the temperature acquisition section made of the material of the sealing element is molded onto the second sealing section, for example in the form of a web protruding radially outwards on the second sealing section. The temperature sensor is arranged on the temperature acquisition section and can therefore measure the temperature rise on the plug-in contact equipped with the second sealing section via the temperature acquisition section.

[0039] In one embodiment, the temperature sensor is embedded in the material of the sealing element. For example, when the sealing element is manufactured, the temperature sensor can be encapsulated by the material of the sealing element by injection molding. In another embodiment, after the sealing element is manufactured, for example by injection molding, the temperature sensor can be installed in a preformed cavity on the sealing element. In the operating state, the temperature sensor is respectively embedded in the sealing element in such a way that heat can be conducted to the temperature sensor via the sealing element and absorbed at the temperature sensor.

[0040] One or more sensor wires may extend through the material of the sealing element toward the temperature sensor.

[0041] In one embodiment, the temperature sensor is arranged on a circuit board that bears against the sealing element. The temperature sensor can be designed, for example, as a so-called SMD component, arranged on the circuit board, and connected to the circuit board via a solder connection (SMD: surface mount device).

[0042] An electrical connection of the temperature sensor can be realized via the printed circuit board, for example in order to connect the temperature sensor to a control element, for example a microcontroller.

[0043] The circuit board can be placed against the sealing element, such as the corresponding second sealing section or the temperature acquisition section, in the axial direction, for example. In another embodiment, the circuit board can be placed against the sealing element, such as the corresponding second sealing section or the temperature acquisition section, in the radial direction.

[0044] In one embodiment, the plug contact has a contact section, which is used to establish an electrical contact plug connection with a corresponding mating contact element of a mating plug connector. The contact section can, for example, have the shape of a contact pin or a contact socket. The mating contact element is correspondingly shaped to be complementary and has the shape of a contact socket or a contact pin. By means of the contact section, when the plug connector is connected to the mating plug connector, the plug contact is plug-connected to the corresponding mating contact element, thereby establishing an electrical connection.

[0045] The plug connector has one or more plug contacts which, when the plug connector is plugged onto a corresponding mating plug connector, engage in a plug-in manner with a respectively corresponding mating contact element of the mating plug connector and thus establish an electrical contact between the plug connector and the mating plug connector. The plug contacts can, for example, each be designed to transmit a charging current in the form of a direct current.

[0046] A charging system for charging an electric vehicle comprises a plug connector of the above-described type. The charging system also comprises a mating plug connector, which can be plug-connected to the plug connector. The plug connector can be arranged on the electric vehicle as a charging socket, for example. Conversely, the mating plug connector can be realized, for example, as a charging plug, which is arranged on a charging cable and can be connected to a plug connector in the form of a charging socket. The charging plug can be connected to a charging station, for example, via a charging cable, so that when the plug connector and the mating plug connector are in a connected state, a charging current can be transmitted from the charging station to the electric vehicle.

[0047] A plug connection of the type described here can be used in particular for transmitting a charging current in the form of a direct current. However, such a plug connection can also be used for transmitting a charging current in the form of an alternating current. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The idea underlying the present invention is explained in detail below with reference to the exemplary embodiments shown in the drawings. It is shown in the drawings:

[0049] Figure 1 : A view of a charging station having a charging cable arranged thereon for connecting to an electric vehicle;

[0050] Figure 2 : View of a plug-in connector in the form of a charging plug;

[0051] Figure 3 : A view of an embodiment of a plug connector in the form of a charging socket on an electric vehicle;

[0052] Figure 4 : Another view of the plug connector;

[0053] Figure 5: A view of an embodiment of a housing part of a plug connector;

[0054] Figure 6 :Along the basis Figure 5 A cross-sectional view of the section line BB in FIG.

[0055] Figure 7 :Along the basis Figure 6 A cross-sectional view of the section line AA in FIG.

[0056] Figure 8 :Along the basis Figure 7 A cross-sectional view of the section line CC in FIG.

[0057] Fig. 9 : A sectional view of an embodiment of a housing part having plug contacts arranged thereon; and

[0058] Fig.10 : A sectional view of another embodiment of a housing part having plug-in contacts arranged thereon. DETAILED DESCRIPTION

[0059] Figure 1 A charging system is shown, which comprises a charging station 1 for charging an electrically driven vehicle 4 (also referred to as an electric vehicle). The charging station 1 is designed to provide a charging current in the form of an alternating current or a direct current and has a cable 2 which is connected at one end 201 to the charging station 1 and at the other end 200 to a mating plug connector 3 in the form of a charging plug.

[0060] As from Figure 2 As can be seen, in one embodiment, the mating plug connector 3 has plug sections 300, 301 on the housing 30, with which the mating plug connector 3 can be plugged into a corresponding plug connector 5 in the form of a charging socket on the vehicle 4. In this way, the charging station 1 can be electrically connected to the vehicle 4 in order to transmit a charging current from the charging station 1 to the vehicle 4.

[0061] exist Figure 3 and Figure 4 In the embodiment of the plug-in connector 5 shown in the figure, which is in the form of a charging socket to be arranged on the electric vehicle 4, plug-in sections 500, 501 are formed on the housing 50, which can be connected along the insertion direction E to the plug-in sections 300, 301 of the mating plug-in connector 3 in the form of a charging plug, so as to establish a mechanical plug-in connection between the charging plug 3 and the charging socket 5 in this way.

[0062] In the embodiment shown, contact elements 52 for transmitting alternating current and control contacts are arranged on the upper plug section 500 of the plug connector 5. On the other hand, plug contacts 51A, 51B for transmitting charging current in the form of direct current are arranged on the lower plug section 501.

[0063] The plug-in contacts 51A, 51B can be constructed as pin-shaped contacts, for example, and when the plug-in connector 5 in the form of a charging socket is plug-connected to the mating plug-in connector 3 in the form of a charging plug, the plug-in contacts are electrically engaged with the corresponding mating contact elements 31 on the plug-in section 301, thereby establishing an electrical connection between the plug-in connector 5 and the mating plug-in connector 3.

[0064] The plug-in contacts 51A, 51B are each connected to a load line 53A, 53B, which is introduced into the housing 50 and is laid inside the electric vehicle 4 in order to conduct the charging current.

[0065] In order to enable rapid charging of the electric vehicle 4 , for example within the scope of a so-called fast charging process, the transmitted charging current has a high current intensity, for example greater than 500 A, possibly even in the order of magnitude of 700 A or more. Due to such high charging currents, heat losses occur at the cable 2 , as well as at the charging plug 3 and the charging socket 5 , which lead to an increase in the temperature of the cable 2 , the charging plug 3 and the charging socket 5 .

[0066] The permissible temperature rise at charging system components is limited as a standard, for example to a maximum value of 50 K. Measures must therefore be taken to prevent excessive temperature rise during charging operations, in particular when using high current intensities, for example in the order of magnitude of 700 A or more.

[0067] In the illustrated embodiment, the housing 50 is composed of two housing parts 503, 504, which are attached to each other and together enclose an interior space in which the plug contacts 51A, 51B, 52 are connected to corresponding electrical conductors, and functional components of the plug connector 5, such as control components on a circuit board, are accommodated in the interior of the interior space. The interior space is sealed in a moisture-proof manner to prevent moisture from possibly penetrating into the plug connector 5, which may affect the electrical insulation between the electrical components of the plug connector 5.

[0068] Figures 5 to 8An embodiment of a housing part 503 is shown, which together with a further housing part 504 to be attached thereto forms a housing 50 of a plug connector 5. The housing parts 503, 504 are provided with edge sections 508, 509 to one another and are attached to one another in such a way that the housing parts 503, 504 join one another in a moisture-tight manner and thus together enclose the interior of the housing 50 within themselves.

[0069] The edge section 509 of the housing 504 is Figure 7 504 and extends circumferentially on the housing part 504 in such a way that the edge section 509 can be attached to the circumferential edge section 508 which is formed on the housing part 503 .

[0070] In order to seal the transition between the edge sections 508, 509 in a moisture-tight manner, a sealing element 54 is provided which has a first sealing section 540 which extends along a closed circumferential extension curve and follows the edge section 508, such as Figure 6 and Figure 8 In this way, the sealing section 540 forms a circumferentially closed sealing contour which, in the assembled state of the plug connector 5, is located between the edge sections 508, 509 of the housing parts 503, 504, so that the transition between the edge sections 508, 509 is sealed in a moisture-tight manner by the sealing section 540.

[0071] In the assembled state, the housing parts 503, 504 are fixed to each other, for example, by means of a screw connection or a latching connection. By connecting the housing parts 503, 504 to each other, the edge section 509 of the housing part 504 abuts against the sealing section 540 of the sealing element 54, so that the sealing section 540 occupies the gap between the edge sections 508, 509 and is compressed to a certain extent, so as to seal the transition between the edge sections 508, 509 in a moisture-tight manner.

[0072] The sealing element 54 is preferably composed of a soft elastic plastic material, such as a silicone material. Thus, the sealing element 54 can be deformed in a soft elastic manner and can be compressed to produce a sealing effect.

[0073] A plug section 501 is formed on the housing part 503, in the region of which plug contacts 51A, 51B are arranged. To this end, the plug contacts 51A, 51B extend through the housing part 503, so that the plug contacts 51A, 51B are respectively inserted into the plug section 501 with the contact section 510 and extend into the interior of the housing 50 with the end 512, as shown in particular from the Figure 7 As can be seen in the sectional view of . Through the end 512, the corresponding plug contacts 51A, 51B, 52 are connected to the corresponding wires in the interior of the housing 50.

[0074] Furthermore, the plug-type contacts 52 also extend through the housing part 503 in the region of the plug-in section 500 .

[0075] In order to seal the transition between the respective plug-in contact 51A, 51B, 52 and the housing part 503 in a moisture-tight manner, the sealing element 54 has second sealing sections 541A, 541B, 544, which each extend circumferentially around the shaft section 511 of the corresponding plug-in contact 51A, 51B, 52, such as Figure 7 Each sealing section 541A, 541B, 544 is accommodated in a corresponding receiving dome 505A, 505B, 507, so that the sealing section 541A, 541B, 544 is arranged radially between the corresponding plug-in contact 51A, 51B, 52 and the receiving dome 505A, 505B, 507 extending longitudinally along the longitudinal axis L, and thus acts as a radial seal between the housing part 503 and the shaft section 511 of the respectively corresponding plug-in contact 51A, 51B, 52.

[0076] In the region of the shaft section 511, the plug contacts 51A, 51B, 52 are cylindrically shaped, wherein the cylinder axis corresponds to the longitudinal axis L of the respective plug contact 51A, 51B, 52. Correspondingly, the corresponding receiving dome 505A, 505B, 507 is also cylindrically shaped on the housing part 503. The sealing sections 541A, 541B, 544 surround the cylindrical shaft section 511 circumferentially and occupy a gap between the shaft section 511 and the corresponding receiving dome 505A, 505B, 507, so that the transition between the respective plug contact 51A, 51B, 52 and the housing part 503 is sealed in a moisture-tight manner.

[0077] The second sealing sections 541A, 541B, 544 are components of the sealing element 54. The second sealing sections 541A, 541B, 544 are connected to the first sealing section 540 surrounding the outside via connecting sections 542A, 542B, 545 in the form of webs, thereby obtaining an integral, associated sealing element 54, which can be arranged in a uniform manner between the housing parts 503, 504 for the assembly of the plug connector 5, so that the housing parts 503, 504 can be assembled to each other.

[0078] In order to monitor the temperature of the plug contacts 51A, 51B, which are designed in particular for transmitting a charging current in the form of a direct current, a temperature acquisition section 543A, 543B is formed on the second sealing section 541A, 541B corresponding to the plug contacts 51A, 51B, respectively. Figure 6 Combination Figure 7The temperature acquisition sections 543A, 543B protrude radially outward from the respective sealing sections 541A, 541B and cover the housing sections 506A, 506B formed on the housing part 503 .

[0079] In the temperature acquisition sections 543A and 543B, there are arranged Fig. 9 and Fig.10 The temperature sensor assembly 55 shown in different embodiments has a temperature sensor 550, which is in operative connection with the material of the temperature acquisition sections 543A, 543B in such a way that heat is introduced from the corresponding plug contacts 51A, 51B via the sealing sections 541A, 541B and the temperature acquisition sections 543A, 543B into the temperature sensor 550 and is received there for the purpose of temperature measurement.

[0080] In accordance with Fig. 9 In the embodiment of the present invention, the temperature sensor 550 is arranged on a circuit board 552. The circuit board 552 serves as a supporting element for the temperature sensor 550 and is embedded in the material of the temperature acquisition sections 543A, 543B. In the embodiment shown, the circuit board 552 rests in the axial direction (with reference to the longitudinal axis L of the corresponding plug-in contact 51A, 51B) on the temperature acquisition sections 543A, 543B protruding radially from the corresponding sealing sections 541A, 541B.

[0081] In accordance with Fig.10 In the embodiment of the present invention, the temperature sensor 550 is embedded in the material of the corresponding temperature acquisition section 543A, 543B and is completely surrounded by the material of the temperature acquisition section 543A, 543B. The temperature sensor 550 can be, for example, injection-molded by the material of the temperature acquisition section 543A, 543B and, therefore, has been embedded in the material of the temperature acquisition section 543A, 543B when the sealing element 54 is manufactured. In another embodiment, the sealing element 54 can be manufactured to have a cavity formed in the respective temperature acquisition section 543A, 543B so that after the sealing element 54 is manufactured, the corresponding temperature sensor 550 is installed in the corresponding cavity inside the temperature acquisition section 543A, 543B.

[0082] The temperature sensor 550 is connected to one or more sensor wires 551 for electrical connection.

[0083] In order to conduct heat from the corresponding plug contacts 51A, 51B toward the corresponding temperature sensor component 55, the sealing element 54 is molded entirely or at least in the area of ​​the corresponding second sealing section 541A, 541B and the temperature acquisition section 543A, 543B from a material with good thermal conductivity, in particular a silicone material, and a ceramic filler, such as aluminum oxide, aluminum nitride or boron nitride, can be embedded in the sealing element to improve the thermal conductivity.

[0084] The sealing element 54 seals the transition between the housing parts 503, 504 and the transition between the plug contacts 51A, 51B, 52 and the corresponding housing part 503, so that the interior of the housing 50 is sealed in a moisture-tight manner and no moisture can penetrate from the outside into the housing 50. In addition, the sealing element 54 enables the coupling of the temperature sensor assembly 55 to the respectively corresponding plug contacts 51A, 51B, so that heat conduction for measuring the temperature at the plug contacts 51A, 51B is achieved through the sealing element 54.

[0085] The sealing element 54 is made of an electrically insulating material and therefore also produces electrical insulation between the respective temperature sensor component 55 and the associated plug-type contact 51A, 51B.

[0086] The idea underlying the present invention is not limited to the above-described exemplary embodiments but can also be realized in other ways.

[0087] Such a contact assembly can be, for example, a component of a plug connector in the form of a charging socket on the electric vehicle side. However, such a contact assembly can also be a component of a plug connector in the form of a charging plug on a charging cable.

[0088] Description of Reference Numerals

[0089] 1 Charging Station

[0090] 2 Charging cables

[0091] 200, 201 end

[0092] 3 Charging plug

[0093] 30 Shell

[0094] 300, 301 plug-in section

[0095] 31 Mating contact elements

[0096] 4 Vehicles

[0097] 5 Charging jack

[0098] 50 Shell

[0099] 500, 501 plug-in section (accommodating socket)

[0100] 502 back cover

[0101] 503, 504 shell parts

[0102] 505A, 505B contain domes

[0103] 506A, 506B shell section

[0104] 507 Accommodating Dome

[0105] 508, 509 edge segments

[0106] 51A, 51B plug contacts

[0107] 510 contact section

[0108] 511 pole section

[0109] 512 end

[0110] 52 contact elements

[0111] 53A, 53B load wire

[0112] 54 Sealing element

[0113] 540 Sealing section

[0114] 541A, 541B sealing section

[0115] 542A, 542B connecting section

[0116] 543A, 543B temperature acquisition section

[0117] 544 Sealing section

[0118] 545 connection section

[0119] 55 Temperature sensor assembly

[0120] 550 Temperature Sensor

[0121] 551 sensor wire

[0122] 552 Circuit Board

[0123] EInsert direction

[0124] L longitudinal axis

Claims

1. A plug connector (5) for a charging system for charging an electric vehicle (4), comprising: a first housing part (503) which is provided with a plug section (501) for plug-in connection with a mating plug connector (3), a second housing member (504) connected to the first housing member (503), at least one plug-in contact (51A, 51B) arranged on the first housing part (503) and used for making electrical contact with a mating contact element (31) of a mating plug-in connector (3), A sealing element (54) having a first sealing section (540) which seals the transition between the first housing part (503) and the second housing part (504) in a moisture-tight manner, and a temperature sensor assembly (55) having a temperature sensor (550), It is characterized in that The sealing element (54) has a second sealing section (541A, 541B) connected to the first sealing section (540), which second sealing section seals the transition between the first housing part (503) and at least one plug-in contact (51A, 51B) in a moisture-proof manner, wherein a temperature sensor (550) is arranged on the sealing element (54) in order to measure the temperature increase on at least one plug-in contact (51A, 51B).

2. The plug connector (5) according to claim 1, characterized in that The sealing element (54) is made of a soft elastic material, in particular a rubber material or a silicone material.

3. The plug connector (5) according to claim 1 or 2, characterized in that The sealing element (54) is made of a resilient plastic material containing a ceramic filler.

4. The plug connector (5) according to any one of claims 1 to 3, characterized in that The first sealing section (540) is arranged between a first edge section (508) of the first housing part (503) and a second edge section (509) of the second housing part (504) and thereby seals the transition between the first housing part (503) and the second housing part (504) in a moisture-tight manner.

5. The plug connector (5) according to claim 4, characterized in that The first sealing section (540) is closed in the circumferential direction along an extension curve along which the first edge section (508) and the second edge section (509) are attached against each other with the first sealing section (540) occupying the interlayer.

6. The plug connector (5) according to any one of the preceding claims, characterized in that At least one plug-type contact (51A, 51B) has a shaft section (511) extending along a longitudinal axis (L) and around which a second sealing section (541A, 541B) extends.

7. The plug connector (5) according to claim 6, characterized in that At least one plug-in contact (51A, 51B) extends along a longitudinal axis (L) through the first housing part (503).

8. The plug connector (5) according to claim 6 or 7, characterized in that At least one plug-in contact (51A, 51B) is accommodated in a receiving dome (505A, 505B) formed on a first housing part (503), wherein, viewed radially with respect to the longitudinal axis (L), a second sealing section (541A, 541B) is arranged between the rod section (511) and the receiving dome (505A, 505B).

9. The plug connector (5) according to any one of the preceding claims, characterized in that The second sealing section (541A, 541B) is connected to the first sealing section (540) via the connecting section (542A, 542B).

10. The plug connector (5) according to any one of the preceding claims, characterized in that A temperature sensor (550) is arranged on the sealing element (54) in the region of the second sealing section (541A, 541B) in order to measure a temperature increase at at least one plug-in contact (51A, 51B).

11. The plug connector (5) according to any one of the preceding claims, characterized in that The sealing element (54) has a temperature acquisition section (543A, 543B) connected to the second sealing section (541A, 541B), and a temperature sensor (550) is arranged on the temperature acquisition section.

12. The plug connector (5) according to any one of the preceding claims, characterized in that The temperature sensor (550) is embedded in the material of the sealing element (54).

13. The plug connector (5) according to any one of the preceding claims, characterized in that The temperature sensor (550) is arranged on a circuit board (552) which bears against the sealing element (54).

14. A charging system for charging an electric vehicle (4) having a plug connector (5) according to any one of the preceding claims.

15. The charging system according to claim 14, characterized in that: The plug connector (5) is a charging socket arranged on the electric vehicle (4).

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