DE102018133100A1 - TEMPERATURE DETECTING UNIT FOR A HIGH VOLTAGE CONNECTION AND METHOD FOR PRODUCING A HIGH VOLTAGE CONNECTION - Google Patents

Abstract

The invention relates to a temperature detection unit (14) for a high-voltage connection (10), comprising a sleeve (16) made of an electrically insulating and thermally conductive plastic, which at least partially surrounds a current-carrying contact element (18) of the high-voltage connection (10); a temperature sensor (22) attached at least indirectly to the sleeve (16) for temperature detection of the contact element (18); a contact device connected to the temperature sensor (22) for providing temperature signals of the temperature sensor (22) for an evaluation device. The invention also relates to a high-voltage connection (10) with a temperature detection unit (14) and to a method for producing a high-voltage connection (10).

Description

Technical field

The present invention relates to a temperature detection unit for a high-voltage connection, a high-voltage connection with such a temperature detection unit, and a method for producing a high-voltage connection.

State of the art

Due to the increasing electrification of the drive train, it is increasingly necessary in motor vehicles to provide options for charging a high-voltage battery of electrically driven motor vehicles. Plug-in hybrid vehicles and purely electrically driven motor vehicles usually have a high-voltage connection, so-called charging sockets, which serve as an interface for charging the respective batteries of such vehicles. Charging plugs can be inserted into such charging sockets in order to charge the batteries of the motor vehicle in question, for example on a charging station.

Such charging sockets usually have a plurality of current-conducting contact elements in the form of high-voltage pins, which are used to charge the respective batteries of the motor vehicles in question. Currents in the range of 500 A often flow via such high-voltage pins, for example when direct current is applied to them. When using such charging sockets, the high-voltage pins should be prevented from becoming too hot. For example, due to contamination on such high-voltage pins, a contact resistance may increase, as a result of which the affected high-voltage pins become very hot. During the operation of such charging sockets, it is therefore of great interest to be able to monitor the temperature of such high-voltage pins as precisely as possible. Due to high voltages and currents, however, it can be difficult to reliably and precisely determine the temperature at such high-voltage pins during the operation of a charging socket - that is to say during a charging operation.

In principle, such a problem can also arise with other high-voltage connections, ie not only with charging sockets of motor vehicles. For example, the problem of reliable temperature detection on current-carrying contact elements, especially occur in the high-voltage range, of plugs or sockets of charging stations or in general in industrial environments with plug contacts.

Description of the invention

It is therefore the object of the present invention to provide a solution by means of which a temperature at a current-carrying contact element of a high-voltage connection can be monitored as precisely as possible in a particularly simple and reliable manner.

This object is achieved by a temperature detection unit for a high-voltage connection and by a method for producing a high-voltage connection with the features of the independent claims. Advantageous refinements with expedient and non-trivial developments of the invention are specified in the dependent claims.

The temperature detection unit according to the invention for a high-voltage connection comprises a sleeve made of an electrically insulating and thermally conductive plastic, which at least partially encloses a current-carrying contact element of the high-voltage connection on the circumference. Furthermore, the temperature detection unit comprises a temperature sensor, at least indirectly attached to the sleeve, for temperature detection of the contact element. Furthermore, the temperature detection unit has a contact device connected to the temperature sensor for providing temperature signals of the temperature sensor for an evaluation device.

An essential core idea of the invention is as follows: in order to enlarge creepage distances and clearances and thus to achieve better dielectric strengths, the current-carrying contact element, for example in the form of a high-voltage pin of the high-voltage connection designed as a charging socket for a motor vehicle, is at least partially enclosed on the circumference of the sleeve . The current-carrying contact element can also be electrically insulated in a completely circumferential manner by the cuff correspondingly completely enclosing it. The sleeve, which at least partially surrounds the contact element and is made of a thermally conductive but electrically insulating plastic, ensures that reliable heat conduction from the contact element via the sleeve to the temperature sensor can take place. At the same time, the electrically insulating sleeve ensures that the risk of flashovers from the high-voltage area to the low-voltage area - i.e. from the contact element to the temperature sensor - is minimized. The temperature sensor can preferably be placed directly on the cuff in order to optimize a thermal connection.

The current-carrying contact element can in principle be any type of current-carrying contact elements, for example a pin, a socket for a pin, a cylindrical plug contact element, a plug contact element with an angular cross section and the like. As already mentioned, the high-voltage connection can be, for example, a charging socket of a motor vehicle. It is also possible that the high-voltage connection is part of a charging plug or a charging socket of a charging station. The high-voltage connection can also be a connection in an industrial environment, in which plug contacts are used for power transmission.

At least the cuff and the temperature sensor attached at least indirectly to the cuff preferably form a unit or a preassembled module. This can ensure that the temperature sensor is arranged at least indirectly on the cuff. Said contact device, which is used to provide temperature signals of the temperature sensor for an evaluation device, can also be part of said unit or the preassembled module. In both cases, manual assembly, in particular of the temperature sensor, can be omitted when assembling the high-voltage connection. It is particularly advantageous if the current-carrying contact element is already present as a unit or preassembled module in the state enclosed by the sleeve with a temperature sensor attached. In this case it can be ensured that reliable heat conduction can take place from the contact element via the sleeve to the temperature sensor.

The contact element can be, for example, an at least substantially cylindrical plug contact made of copper, a copper alloy or another suitable alloy with good current-conducting properties. The contact element is preferably solid. A core of the contact element can also be made of copper, for example, wherein a coating made of another material, for example silver, can be provided. The cuff can be made from a wide variety of plastics. It is essential here that the material from which the sleeve is made has, on the one hand, high thermal conductivity and, on the other hand, good electrical insulating properties.

By means of the contact device, which is connected to the temperature sensor, temperature signals provided by the temperature sensor can be transmitted to an evaluation device. The evaluation device can, for example, be part of the e.g. be designed as a charging socket high-voltage connection itself. Alternatively, the evaluation device can also be arranged outside the high-voltage connection and can be, for example, a vehicle-side control device. The contact device is used in particular to tap and forward analog temperature signals from the temperature sensor. The shorter the analog signal transmission path, the better it is for the exact evaluation of the temperature signals. For example, analog temperature signals of the temperature sensor can be converted into digital temperature signals by means of said evaluation device and then transmitted to a CAN bus of the motor vehicle in question. The CAN bus is a common example of a field bus, other field buses such as LIN bus, Flexray, Ethernet are also conceivable here. In the simplest case, the contact device is an electrical conductor, by means of which analog temperature signals can be passed on from the temperature sensor to an evaluation device of whatever type.

By means of the temperature detection unit according to the invention, it is possible in a simple and reliable manner to detect temperatures at the current-carrying contact element of the high-voltage connection. Because the temperature sensor is arranged at least substantially in the immediate vicinity of the current-carrying contact element, temperature changes on the contact element can be detected particularly quickly.

In particular due to the good thermal conductivity of the sleeve, it can be ensured that temperature changes on the contact element can be detected very quickly by means of the temperature sensor attached at least indirectly to the sleeve. If, for example, a contact resistance increases due to impurities on the contact element, the contact element can e.g. become very hot during a charging process if the contact element is a high-voltage pin of a charging socket of a motor vehicle. Such a heating of the contact element can be determined with the temperature detection unit without great delays. For example, temperature rises of several degrees Celsius per minute or even shorter time units can be easily determined using the temperature detection unit. If necessary, appropriate measures can then be initiated to avoid further heating of the contact element or to achieve cooling of the contact element. For example, if the contact element belongs to a charging socket of a motor vehicle, a charging current can be reduced if the contact element warms up faster than permitted or has reached a predetermined threshold temperature. It is also possible that the charging process is interrupted when a temperature defined as critical is detected in the contact element.

An advantageous embodiment of the invention provides that a contact ring is arranged between the sleeve and the current-carrying contact element, which connects the contact element and the sleeve to one another in a thermally conductive manner. The thermal connection can thus take place via said contact ring, which is arranged within the sleeve. This contact ring can be made, for example, of copper or other good heat-conducting materials. The contact ring preferably has a large number of individual lamellae. These fins can be bulged inwards in the radial direction. When the contact element is inserted, the lamellae are pressed slightly radially outwards and elastically deformed. This results in a reliable and permanent contact between the contact element and the individual lamellae of the contact ring. The contact ring can, for example, be encapsulated by the sleeve. With a suitable component geometry, the contact ring can also simply be inserted on the inside into the sleeve. In the latter it is essential that the inserted contact ring cannot slip when the contact element is inserted. In addition to the heat conduction, the contact ring also compensates for play or tolerance, in particular in the radial direction. In addition, when the contact element is installed inside the sleeve, no excessively strong forces act on the sleeve itself. This is because friction only occurs between the contact element and the contact ring during assembly or insertion of the contact element.

An alternative advantageous embodiment of the invention provides that the sleeve rests directly on the contact element. The aforementioned contact ring is therefore not required in this embodiment of the invention. In this case, a diameter of the sleeve can turn out to be smaller than in the previously mentioned embodiment. This also results in a somewhat smaller thermal mass directly on the contact element, which can have a positive effect on the temperature detection on the contact element. The sleeve can, for example, be an injection molded part, in which case the contact element can be overmolded by means of the sleeve during manufacture. In this case, a particularly dimensionally stable assembly can be produced from the sleeve and the contact element. It is therefore not necessary to insert the contact element into the sleeve. Corresponding mechanical forces that otherwise act on the cuff do not occur. In contrast to the case in which the contact element is pushed into the sleeve, the sleeve itself does not have to be made as solid or with such large wall thicknesses when the contact element is encapsulated by means of the material of the sleeve. In this case, the wall thickness of the sleeve is preferably chosen to be only so large that electrically insulating properties or requirements can be reliably met.

A further advantageous embodiment of the invention provides that the contact element has a polygonal cross section. The contact element can e.g. be pin-shaped or elongated, the contact element having the polygonal cross-section in a plane transverse to the main direction of extension. This is particularly advantageous when the sleeve lies directly on the contact element, especially when the sleeve is an injection molded part and the contact element is encapsulated by means of the sleeve. For example, the contact element can have an octagonal cross section. Other polygonal cross sections are of course also possible. The polygonal cross-section can prevent the contact element from rotating on the one hand about its longitudinal axis relative to the sleeve and on the other hand relative to the housing of the charging socket.

According to a further advantageous embodiment of the invention, it is provided that the contact device has at least one printed conductor printed on the sleeve, which is connected to the temperature sensor. Preferably, two conductor tracks are printed on the sleeve, which are connected to respective outputs of the temperature sensor. The temperature sensor can be soldered to the outside of the sleeve, for example. In this case, the temperature sensor can also be electrically conductively connected to the at least one conductor track, for example by a soldering process. Because at least one conductor track is printed on the sleeve, contact can be made between the temperature sensor and the conductor track in a particularly simple manner. The conductor track can be used, in particular, to tap and forward analog temperature signals which are provided by means of the temperature sensor.

In a further advantageous embodiment of the invention, it is provided that the contact device has at least one contacting clip attached to the sleeve, which is connected at least indirectly to the temperature sensor and is designed for contacting a circuit board or conductor track of the high-voltage connection. For example, the high-voltage connection can have a printed circuit board with a through opening. The sleeve can be pushed or inserted so far through this through opening that the at least one contacting clip attached to the sleeve is contacted in an electrically conductive manner with the printed circuit board. If the high-voltage connection itself has no circuit board integrated into the housing it should also be provided that, for example, one or more conductor tracks are provided on the upper side of a housing of the high-voltage connection. In this case, the at least one contact clip can serve to establish an electrically conductive connection with this conductor track or these conductor tracks. In order to achieve as uniform a load as possible on the sleeve and, for example, also on a printed circuit board of the high-voltage connection, it is particularly preferred to provide two of these contact clips on opposite sides of the sleeve. Instead of attaching one or more contacting clips directly to the sleeve, it is alternatively also possible for at least one such contacting clip to be provided on the guide plate itself. This can serve to establish an electrically conductive connection, for example with the conductor tracks printed on the sleeve.

A further advantageous embodiment of the invention provides that the at least one contact clip has an indentation in the radial direction for establishing a snap connection with the printed circuit board of the high-voltage connection. In this way, the sleeve with the contacting clip attached to it can be pushed through a through opening in the printed circuit board. The contacting clip is compressed somewhat in the radial direction and then snaps outwards as soon as said indentation of the contacting clip is arranged at the level of the through opening or the border of the through opening of the printed circuit board. In this way, an electrically conductive connection between the temperature sensor attached to the sleeve and the printed circuit board of the high-voltage connection can be produced in a particularly simple manner. In addition, when the sleeve is inserted through the through opening of the circuit board, hardly any forces act perpendicular to the circuit board, but at least essentially only within the plane of the circuit board. In other words, there are hardly any or no bending forces on the circuit board.

An alternative advantageous embodiment of the invention provides that the at least one contacting clip is designed for wedging on the printed circuit board of the high-voltage connection. For example, the contact clip can have two spring arms that converge in a wedge shape. One of the two spring arms can, for example, be attached to the outside of the sleeve in a flat manner, while the other spring arm projects outward in a wedge shape. If the sleeve is then pushed through said passage opening of the printed circuit board again, the wedge-shaped spring arm protruding outwards is bent inwards in the radial direction, that is to say pressed in the direction of the spring arm lying flat against the sleeve. As a result, the sleeve is wedged in the area of the through opening of the circuit board by means of the contact clip. On the one hand, this can in turn result in reliable electrical contacting between the temperature sensor, which is at least indirectly attached to the sleeve, and the printed circuit board. On the other hand, in the case there are no excessive forces perpendicular to the circuit board, so that no or at least hardly any bending forces occur on the circuit board.

According to a further advantageous embodiment of the invention, it is provided that the sleeve has a radial projection for interacting with a receptacle on a housing of the high-voltage connection for centering the sleeve. The interaction between the radial projection and the receptacle ensures that the sleeve is positioned precisely relative to the rest of the high-voltage connection. A reliable electrically conductive contacting of the temperature sensor can thereby be ensured in particular.

In a further advantageous embodiment of the invention, it is provided that the sleeve completely encloses the contact element and has a heat compensation area for compensating for different thermally induced expansions of the contact element and the sleeve, or the sleeve for compensating for different thermally induced extensions of the contact element and the sleeve does not have the contact element completely encloses. In both cases, it can be ensured that thermally induced different expansions of the contact element and the sleeve, in particular in the radial direction, can be compensated for without any problems, so that it can be ensured at any time that the sleeve is always at least indirectly in contact with the contact element. This makes it possible to achieve reliable heat conduction from the contact element to the temperature sensor attached at least indirectly to the sleeve. So even if the contact element and the sleeve expand to different extents due to thermal reasons, it can be ensured that the temperature measurement with respect to the contact element can be carried out reliably at any time.

A further advantageous embodiment of the invention provides that a measuring board is arranged between the sleeve and the temperature sensor and is connected to the contact device. In other words, it can be provided that the temperature sensor itself is not attached directly to the outside of the sleeve. Instead, it is provided that said measuring plate is attached to the outside of the cuff, again on the side of the measuring plate facing away from the cuff Temperature sensor is attached. The charging socket itself can in turn have a type of main board or printed circuit board which can be connected to the measuring board in an electrically conductive manner. The measuring board can be glued to the outside of the cuff, for example, by means of a highly thermally conductive adhesive. In addition, it can be provided that one or more vias, also referred to as thermal vias, are provided on the temperature sensor in order to optimally couple the temperature sensor to the measuring board.

According to a further advantageous embodiment of the invention, it is provided that the sleeve has a recess in the radial direction, in which the temperature sensor is accommodated, which is arranged with its radially outward-facing side on a measuring board which is connected to the contact device. The depression is preferably a blind hole. In order to optimize the thermal connection to the cuff, a gap filler or a thermal paste is preferably applied in the recess of the cuff before the temperature sensor is inserted. Retaining lugs can preferably be provided around the area of the recess of the sleeve, which lugs are preferably used to fix the measuring board to which the temperature sensor is attached. In this case, it is possible in particular to dispense with an additional adhesive for fixing the measuring board. In this case, the temperature sensor is thus arranged on the cuff in the area of a particularly thin wall thickness - namely in the radial recess in question. The advantage here is that the distance between the current-carrying contact element and the temperature sensor is particularly small. In particular, heat conduction from the contact element to the temperature sensor only has to overcome a very short distance or reduced wall thickness of the sleeve. As a result, temperature changes on the contact element can be detected particularly quickly by means of the temperature sensor.

A further alternative advantageous embodiment of the invention provides that the temperature sensor is accommodated in a through opening of the sleeve and is arranged in the radial direction between an electrically insulating heat-conducting pad resting on the contact element and a measuring board connected to the contact device. In this variant of the invention, the temperature sensor lies in a kind of breakthrough of the cuff, i.e. H. there is no longer any material layer of the sleeve between the temperature sensor and the contact element. For this purpose, a receiving trough for the electrically insulating heat-conducting pad is provided within the passage opening of the sleeve. This thermal pad has sufficient dielectric strength to ensure a defined separation of high-voltage and low-voltage areas. The thermal pad is preferably so soft that it can be compressed. Due to the deformability of the thermal pad, it can rest flat on the contact element and on the temperature sensor. For assembly, it is advantageous if at least one side of the thermal pad is self-adhesive, preferably the side that faces the temperature sensor. An essential advantage in this embodiment of the invention is a relatively large freedom in the choice of the material of the sleeve, since the heat conduction is taken over or defined solely by the heat conduction pad. This thermal pad can have a much better thermal conductivity than the plastics suitable for the sleeve. In addition, the probability of the formation of an air gap between the contact element and the temperature sensor is very low over the entire service life, since the preferably elastically deformable heat-conducting pad ensures a permanent and gap-free connection between the contact element and the temperature sensor.

The high-voltage connection according to the invention comprises the temperature detection unit according to the invention or an advantageous embodiment of the temperature detection unit according to the invention, which is arranged on the high-voltage connection. For example, the temperature detection unit can be inserted into a housing of the high-voltage connection. The high-voltage connection can e.g. act as a charging socket for a motor vehicle. The high-voltage connection can also be a plug or a socket of a charging station. The high-voltage connection can also be a plug contact in an industrial, non-automotive environment. Said housing is preferably a 2K housing. A receiving area or a recess in the housing into which the temperature detection unit can be inserted is preferably made of silicone or a silicone layer. This silicone layer can serve as a compensation element for tolerances and thermal stresses.

In the method according to the invention for producing a high-voltage connection, the temperature detection unit according to the invention or an advantageous embodiment of the temperature detection unit according to the invention is preassembled at least to the extent that the temperature sensor is fixed relative to the cuff, and only then is the at least partially preassembled temperature detection unit mounted on or in the high-voltage connection, whereby the temperature sensor is electrically contacted with the high-voltage connection by means of the contact device. This results in a defined position of the temperature sensor relative to the cuff. The temperature sensor itself does not have to be positioned manually on the cuff and fixed while the entire socket is fully assembled. A particularly reliable temperature detection by means of the temperature sensor with respect to the current-carrying contact element can thereby be ensured. An essential effect results from the design of the temperature detection unit: The temperature sensor is electrically contacted to the evaluation unit automatically if the temperature detection unit - together or separately from the current-carrying contact element - is arranged on or in the high-voltage connection, e.g. plugged into a housing of the high-voltage connection. Advantageous configurations of the temperature detection unit according to the invention or of the high-voltage connection are to be regarded as advantageous configurations of the method according to the invention and vice versa.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing. The features and combination of features mentioned above in the description and the combination of features and features shown below in the description of the figures and / or in the figures alone can be used not only in the combination specified in each case, but also in other combinations or on their own, without leaving the scope of the invention.

Figure list

• 1 eine geschnittene Frontalansicht einer ersten Ausführungsform einer Ladedose für ein Kraftfahrzeug
• 2 eine teilweise geschnittene Seitenansicht der ersten Ausführungsform der Ladedose;
• 3 eine Draufsicht auf die erste Ausführungsform der Ladedose;
• 4 eine Perspektivansicht einer Kontaktierspange der Ladedose;
• 5 eine Perspektivansicht auf verschiedene mögliche Ausführungsformen eines Kontaktkranzes der Ladedose;
• 6 eine geschnittene Frontalansicht einer zweiten Ausführungsform der Ladedose;
• 7 eine Draufsicht auf die zweite Ausführungsform der Ladedose;
• 8 eine teilweise geschnittene Seitenansicht einer dritten Ausführungsform der Ladedose;
• 9 eine Draufsicht auf die dritte Ausführungsform der Ladedose;
• 10 eine Perspektivansicht einer weiteren Ausführungsform der Kontaktierspange;
• 11 eine teilweise geschnittene Seitenansicht einer vierten Ausführungsform der Ladedose;
• 12 eine Draufsicht auf die vierte Ausführungsform der Ladedose;
• 13 eine teilweise geschnittene Seitenansicht einer fünften Ausführungsform der Ladedose;
• 14 eine Draufsicht auf die fünfte Ausführungsform der Ladedose;
• 15 eine geschnittene Frontalansicht einer sechsten Ausführungsform der Ladedose;
• 16 eine teilweise geschnittene Seitenansicht der sechsten Ausführungsform der Ladedose;
• 17 eine Draufsicht auf die sechste Ausführungsform der Ladedose;
• 18 eine teilweise geschnittene Seitenansicht einer siebten Ausführungsform der Ladedose;
• 19 eine geschnittene Frontalansicht einer achten Ausführungsform der Ladedose;
• 20 eine geschnittene Seitenansicht der achten Ausführungsform der Ladedose;
• 21 eine Draufsicht auf die achte Ausführungsform der Ladedose;
• 22 eine geschnittene Frontalansicht einer neunten Ausführungsform der Ladedose;
• 23 eine teilweise geschnittene Seitenansicht der neunten Ausführungsform der Ladedose;
• 24 eine Detailansicht der neunten Ausführungsform der Ladedose in einer geschnittenen Seitenansicht;
• 25 eine Draufsicht auf die neunte Ausführungsform der Ladedose;
• 26 eine Draufsicht auf eine mögliche Ausgestaltung einer Manschette, welche einen Hochvolt-Pin der Ladedose teilweise umschließt;
• 27 eine Draufsicht auf eine weitere mögliche Ausgestaltung der Manschette, welche den Hochvolt-Pin der Ladedose vollständig umschließt.
• 28 eine geschnittene Frontalansicht einer zehnten Ausführungsform der Ladedose;
• 29 eine teilweise geschnittene Seitenansicht der zehnten Ausführung von der Ladedose;
• 30 eine Abfolge von Montageschritten zum Vormontieren der zehnten Ausführungsform der Ladedose in einer teilweise geschnittenen Seitenansicht; und
• 31 eine Abfolge von Montageschritten zum Vormontieren der zehnten Ausführungsform der Ladedose in einer geschnittenen Draufsicht.

The drawing shows in:

• 1 a sectional front view of a first embodiment of a charging socket for a motor vehicle
• 2nd a partially sectioned side view of the first embodiment of the charging socket;
• 3rd a plan view of the first embodiment of the charging socket;
• 4th a perspective view of a contact clip of the charging socket;
• 5 a perspective view of various possible embodiments of a contact ring of the charging socket;
• 6 a sectional front view of a second embodiment of the charging socket;
• 7 a plan view of the second embodiment of the charging socket;
• 8th a partially sectioned side view of a third embodiment of the charging socket;
• 9 a plan view of the third embodiment of the charging socket;
• 10 a perspective view of another embodiment of the contact clip;
• 11 a partially sectioned side view of a fourth embodiment of the charging socket;
• 12th a plan view of the fourth embodiment of the charging socket;
• 13 a partially sectioned side view of a fifth embodiment of the charging socket;
• 14 a plan view of the fifth embodiment of the charging socket;
• 15 a sectional front view of a sixth embodiment of the charging socket;
• 16 a partially sectioned side view of the sixth embodiment of the charging socket;
• 17th a plan view of the sixth embodiment of the charging socket;
• 18th a partially sectioned side view of a seventh embodiment of the charging socket;
• 19th a sectional front view of an eighth embodiment of the charging socket;
• 20 a sectional side view of the eighth embodiment of the charging socket;
• 21st a plan view of the eighth embodiment of the charging socket;
• 22 a sectional front view of a ninth embodiment of the charging socket;
• 23 a partially sectioned side view of the ninth embodiment of the charging socket;
• 24th a detailed view of the ninth embodiment of the charging socket in a sectional side view;
• 25th a plan view of the ninth embodiment of the charging socket;
• 26 a plan view of a possible embodiment of a sleeve that partially encloses a high-voltage pin of the charging socket;
• 27 a plan view of a further possible embodiment of the sleeve, which completely encloses the high-voltage pin of the charging socket.
• 28 a sectional front view of a tenth embodiment of the charging socket;
• 29 a partially sectioned side view of the tenth embodiment of the charging socket;
• 30th a sequence of assembly steps for preassembling the tenth embodiment of the Charging socket in a partially sectioned side view; and
• 31 a sequence of assembly steps for preassembling the tenth embodiment of the charging socket in a sectional plan view.

Identical or functionally identical elements have been provided with the same reference symbols in the figures.

A first embodiment of a charging socket 10 for an unspecified motor vehicle is in a sectional front view in 1 shown. The charging socket 10 is to be understood only as an example both in this and in the subsequent embodiments. The following explanations do not only apply to charging sockets 10 of motor vehicles. In general, it can be a high-voltage connection, for example in the form of a charging socket 10 or also in the form of a plug or socket of a charging station or a plug contact in an industrial, non-automotive environment.

The charging socket 10 includes a housing 12th with an unspecified conical recess in which a total of 14 designated temperature detection unit is partially included. The temperature detection unit 14 includes one in the housing 12th inserted cuff 16 made of an electrically insulating and thermally conductive plastic. The cuff 16 is in this case with a conical region (not specified) in the conical recess in the housing 12th used.

The cuff 16 encloses a high-voltage pin 18th circumferential. The high-voltage pin 18th stands for a current-carrying contact element in this and in all subsequent embodiments. The current-carrying contact element can be, for example, the said high-voltage pin 18th act. But it can also be another plug contact element; eg in the form of a male or female part of a connector.

The high-voltage pin 18th is made of an electrically highly conductive material, for example copper, a copper alloy or the like. In addition, the high-voltage pin 18th for example with a particularly good electrically conductive coating, such as silver or the like. Part of the high-voltage pin 18th is in a conical recess 20 of the housing 12th arranged. In this conical recess 20 can be inserted part of a shop plug, not shown, to this with the high-voltage pin 18th to contact.

Such a charging socket usually has 10 several such high-voltage pins 18th on. The charging socket 10 and the one for the charging socket 10 belonging high-voltage pins 18th serve to charge a battery of an electrically powered motor vehicle. Such high-voltage pins can occur during a charging process 18th become very hot. Usually, it should be avoided that such high-voltage pins 18th be heated above a predetermined temperature. In addition, it can be due to contamination on such high-voltage pins 18th happen that they heat up particularly quickly and strongly. Temperature monitoring of such high-voltage pins 18th is therefore desirable during charging.

At a temperature of the high-voltage pin 18th To be able to detect is a temperature sensor in the embodiment of the charging socket shown here 22 directly on the outside of the cuff 16 appropriate. In the case shown here, the cuff lies 16 in the area of the temperature sensor 22 not directly on the high-voltage pin 18th on. For the thermal connection of the sleeve 16 - and thus also the temperature sensor 22 - to the high-voltage pin 18th is a contact wreath 24th provided which is inside the cuff 16 is arranged. The contact wreath 24th can, for example, by means of the material of the cuff 16 overmolded or injected. With a suitable component geometry, the contact ring can 24th also, for example, only in the cuff 16 be inserted. In the embodiment shown here, the high-voltage pin 18th simply into the cuff from top to bottom as shown below 16 and thus also in the contact ring 24th inserted. If the contact ring 24th just in the cuff 16 has been inserted or arranged therein, axial stops can be provided which prevent the contact ring 24th when inserting the high-voltage pin 18th slipped further down.

With the housing 12th it is a 2K housing, being a component of the housing 12th is made of silicone and a silicone seal 26 forms. A locking element 28 serves the cuff 16 to the silicone gasket 26 keep pressed.

In 2nd is the first embodiment of the charging socket 10 shown in a partially sectioned side view. On the cuff 16 are two conductor tracks 30th printed, which with the temperature sensor 22 are electrically connected. From the temperature sensor 22 Provided temperature signals can by means of the conductor tracks 30th with the mediation of respective contact clips 32 on a circuit board 34 the charging socket 10 to get redirected. The conductor tracks 30th are part of an unspecified contact device of the Temperature detection unit 14 and serve temperature signals from the temperature sensor 22 to provide an evaluation device, not shown here.

This evaluation device can, for example, be part of the charging socket 10 be, the evaluation device also outside the charging socket 10 can be arranged.

In 3rd is the first embodiment of the charging socket 10 shown in a top view. In the present illustration it can be clearly seen that the cuff 16 a radial projection 36 to interact with a recording 38 on the housing 12th the charging socket 10 to center the cuff 16 having.

For mounting the charging socket 10 can be done as follows: The circuit board 34 is first in the housing 12th placed. Then the cuff 16 with the inserted or injected contact ring 24th in the housing 12th placed. The temperature sensor 22 is already on the cuff 16 been soldered. When inserting the cuff 16 in the housing 12th is made using the contact clips 32 an electrical connection between the circuit board 34 and the conductor tracks 30th , thus also to the temperature sensor 22 , manufactured. The correct positioning of the cuff 16 to the housing 12th is due to the radial projection 36 in interaction with the recording 38 on the housing 12th given. After that, the locking element 28 inserted in an unlocked position and the high-voltage pin 18th is pushed into a locking position, which causes the high-voltage pin 18th and the cuff 16 be locked in the direction of their longitudinal axis.

The silicone gasket 26 of the housing 12th serves on the one hand to seal between the housing 12th and the cuff 16 and on the other hand also for sealing between the housing 12th and the high-voltage pin 18th . The silicone seal also serves 26 also to compensate for tolerances and thermal tension. The silicone gasket 26 is in the placement trough of the housing, not specified here 12th into which the cuff 16 is inserted up to an upper edge of the housing 12th pulled so the cuff 16 correspondingly flat on the silicone seal 26 is present.

The locking element 28 is preferably designed so that it is the cuff 16 easily into the silicone gasket 26 pushes in. This allows mechanical tolerances to be compensated. The contact wreath 24th is just put in the cuff, for example 16 inserted because of the high-voltage pin 18th on lamellae of the contact ring, which are not specified here 24th presses radially outwards and thus the contact ring 24th in the cuff 16 holds on. In the cuff 16 is preferably provided only a step, not specified, which the contact ring 24th - According to the present presentation in the 1 and 2nd - supports downwards so that the contact ring 24th when inserting the high-voltage pin 18th cannot slip down.

The contact wreath 24th ensures very good heat conduction from the high-voltage pin 18th over the cuff 16 to the temperature sensor 22 . In addition, the contact ring 24th any play and tolerances of the high-voltage pin 18th equalize so that the high-voltage pin always has at least almost optimal heat connection 18th can be taken care of.

In 4th is a possible embodiment of the contact clip 32 shown in a perspective view. The contact clip 32 has several extensions 40 by means of which the contact clip 32 into the circuit board 34 inserted and can be contacted at this. In addition, the contact clip 32 a spring element 42 on when inserting the cuff 16 into the housing 12th pushed away and in the correct position of the cuff 16 on the printed conductor tracks 30th is present. The contact areas of the conductor tracks 30th can also be refined - for example by galvanic treatment or by soldering gold-plated contact surfaces.

In 5 are different possible embodiments of the contact ring 24th shown in a perspective view. As can be seen, the embodiments of the contact ring shown here are 24th not completely closed in the circumferential direction. In addition, all embodiments of the contact ring have 24th a plurality of lamellae, not specified, which are bulged in a central region radially inwards. These slats are when the high-voltage pin is inserted 18th bent radially outwards and nestle against the outside of the high-voltage pin 18th on.

In 6 is a second embodiment of the charging socket 10 shown in a sectional frontal view. This embodiment of the charging socket 10 differs from the first embodiment in that inside the cuff 16 no contact ring 24th is provided. Instead, the cuff lies 16 flat on the outside of the high-voltage pin 18th on. Around the high-voltage pin 18th through the cuff 16 To be able to push through, it can be provided that the inner diameter of the sleeve 16 is minimally larger than the outside diameter of the high-voltage pin 18th at its thickest point.

In 7 is the second embodiment of the charging socket 10 shown in a top view. The contact clips 32 are at least substantially immediately adjacent to the temperature sensor 22 in this embodiment and not opposite one another as in the first embodiment. This arrangement of the contact clips 32 ensures a slight spring force on the cuff 16 consequently the cuff is exercised 16 to the high-voltage pin 18th is pressed. This can ensure that it is the area of the inner circumference of the cuff 16 on the high-voltage pin 18th which is the temperature sensor 22 is closest. The locking element 28 (please refer 6 ) can also, for example, by a correspondingly beveled surface, the cuff 16 additionally to the high-voltage pin in a defined direction 18th to press. The cuff can do that 16 also have a bevelled surface. In comparison to the first embodiment, the elimination of the contact ring 24th the diameter of the cuff 16 turn out a bit smaller.

In 8th is a third embodiment of the charging socket 10 shown in a partially sectioned side view. This third embodiment of the charging socket 10 can both with contact wreath 24th as well as without a contact ring 24th be trained, which cannot be seen here from the chosen perspective. In this embodiment, the contact clips 32 directly on the cuff 16 soldered on, for example using so-called SMD technology. The contact clips form here 32 together with those on the cuff 16 printed conductor tracks 30th a contact device for tapping and providing temperature signals from the temperature sensor 22 .

The contact clips 32 lie with their underside on respective conductor tracks 44 of the housing 12th on. These traces 44 can, for example, in or on the housing 12th to be printed. In this embodiment, the circuit board, not shown, could 34 the charging socket 10 independent of a connector face - i.e. the arrangement of the high-voltage pins 18th to each other - always be kept the same. Contrary to the present representation, the contact clips 32 also on the circuit board, not shown here 34 lie on instead of the housing 12th The locking element 28 In this embodiment, an axial force must be exerted on the cuff 16 exercise this towards the case 12th or the circuit board 34 to press.

In 9 is the third embodiment of the charging socket 10 shown in a top view. There is a version with a contact ring 24th shown. However, it is also possible to use the third embodiment of the charging socket 10 without contact ring 24th to perform, in which case the cuff 16 directly on the high-voltage pin 18th is present. In this top view it is again easy to see how the conductor tracks 44 of the housing 12th run. For example, one from the temperature sensor 22 tapped analog temperature signal via the on the housing 12th printed conductor tracks 44 are dissipated and fed to an evaluation device which converts the analog temperature signal into a digital temperature signal.

In 10 is another possible embodiment of the contact clips 32 shown, exactly as they are shown in the 8th and 9 illustrated embodiment of the charging socket 10 can be used.

In 11 is a fourth embodiment of the charging socket 10 shown in a partially sectioned side view. This embodiment differs from the third embodiment in that the cuff 16 no printed conductor tracks 30th having. Instead, the contact clips 32 designed so that this directly with the temperature sensor 22 electrically connected and in the cuff 16 are integrated. The contact clips 32 can, for example, be inserted into an appropriate injection molding tool, after which a plastic material from which the cuff 16 is produced, is injected into the injection molded part. This will make the contact clips 32 partly from the material of the cuff 16 encapsulated and in the cuff 16 integrated. The contact clips 32 can be stamped and bent parts, for example. In this embodiment, the contact clips 32 not on the cuff 16 attached, for example soldered.

In 12th is the fourth embodiment of the charging socket 10 shown in a top view. In this representation, you can see again clearly the shape of the contact clips 32 exhibit. Because the cuff 16 has no printed conductor tracks, are the contact clips, which are preferably designed as stamped and bent parts 32 shaped so that they have a sufficiently large extent in the circumferential direction so that they directly with the temperature sensor 22 can be electrically connected.

In 13 is a fifth embodiment of the charging socket 10 shown in a partially sectioned side view. As with the fourth embodiment, the fifth embodiment has the charging socket 10 none on the cuff 16 printed conductor tracks 30th on. Instead, the contact clips 32 shaped again and into the cuff 16 integrated that the contact clips 32 directly electrically conductive with the temperature sensor 22 are connected. The fifth embodiment differs from the fourth embodiment in particular in that the contact clips 32 with a circuit board 34 and not directly with the conductor tracks 44 on the housing 12th be contacted. The circuit board 34 has respective conductor tracks 46 on which, for example, on the circuit board 34 can be printed.

The contact clips 32 have respective radially inward indentations 48 on which is a snap connection to the circuit board 34 can enter into. The contact between the contact clips 32 and the circuit board 34 is done by a kind of radial snap-fit. Forces act at least essentially only in the plane of the circuit board and not perpendicular to it. The conductor tracks 46 on the circuit board 34 are over a respective, the contact clips 32 facing edge led out, so that a sufficiently good electrical contact between the contact clips 32 and the conductor tracks 46 can be ensured. The contact clips 32 can in turn be designed as a stamped and bent part. But it is also possible that the contact clips 32 on the cuff 16 be soldered, in which case, for example, again on the cuff 16 printed conductor tracks, not shown here 30th can be provided.

The advantage with this embodiment is that respective spring forces of the contact clips 32 can cancel each other out in total or be chosen so that the resulting spring force the cuff 16 defined on the high-voltage pin 18th presses (as with the in 7 shown embodiment). In the embodiment shown here, the cuff snaps 16 So with the mediation of the contact clips 32 into the circuit board 34 one and does not necessarily have to go through the locking element 28 against the housing 12th be tense. In this respect, a version is also possible in which the silicone seal 26 does not have to be pulled up to the inside of the housing - up to the top as shown.

In 14 is the fifth embodiment of the charging socket 10 shown in a top view. Again there is a contact ring 24th provided, which is for thermal contacting of the high-voltage pin 18th to the cuff 16 serves. As already mentioned, it is also possible that the contact ring 24th is omitted, in which case the thermal contact directly between the cuff 16 and the high-voltage pin 18th he follows.

In 15 is a sixth embodiment of the charging socket 10 shown in a sectional frontal view. In this embodiment, the high-voltage pin 18th encapsulated with a plastic material from which the cuff 16 has been manufactured. Because with this method the mechanical load on the cuff 16 is relatively low because of the high-voltage pin 18th not yet in the cuff 16 relatively small material thicknesses of about 0.5 mm are possible. Decisive for the material thickness or layer thickness are only the requirements for the electrical insulation and the stability of the cuff 16 formed plastic sheath over the life.

In this context, signs of aging due to climatic changes and strong temperature changes play a role. The length of the high-voltage pin 18th overmolded is dependent on the necessary dielectric strength, since the electrically insulating sheathing by means of the sleeve 16 has a direct influence on the creepage distances and clearances and is intended to prevent a voltage flashover from a high-voltage to a low-voltage side. It is advantageous here if the sleeve serving as the jacket 16 at least to a certain extent in the housing 12th reaches into it.

The high-voltage pin 18th itself in this embodiment is preferably not round over its entire length, but has a polygonal cross section, for example an octagonal cross-sectional area. This is particularly useful for the high-voltage pin 18th rotation-proof in the housing 12th the charging socket 10 to center. This polygonal shape is preferably also after the encapsulation with the plastic material from which the cuff 16 is maintained, so that at least one flat outer surface with the smallest possible layer thickness of the surrounding plastic is provided, on which a small measuring board 50 is glued to the outside of which the temperature sensor 22 is appropriate. For sticking the measuring board 50 an adhesive is preferably used which has good thermal conductivity. Furthermore, between the temperature sensor 22 and the measuring board 50 preferably a certain number of thermal vias (vias to improve vertical heat conduction) are provided around the measurement board 50 thermally as optimal as possible to the temperature sensor 22 to couple.

So that the high-voltage pin 18th regardless of its later rotational position, an installation coding is made by means of the extrusion coating using the plastic material from which the sleeve is made 16 is made. For this there is at least one radial projection 36 on the cuff 16 provided, which serves as a kind of positioning lug. The radial lead 36 ensures that the cuff 16 even just twisted around its longitudinal axis into the housing 12th can be used that at least one on the measuring board 50 attached contact clip 32 also correctly positioned to the conductor track 44 the circuit board 34 can be arranged. This ensures that the electrical contacting takes place at the correct point or side.

In the case shown here is the contact clip 32 formed obliquely, so that there is a jam on the circuit board 34 can be done. The design of the sixth embodiment of the charging socket 10 is in 16 in a partially sectioned side view and in 17th shown again in a top view. From these representations it can be seen that two of the wedge-shaped contacting clips 32 are provided to provide an electrically conductive connection between the measuring board 50 and the conductor tracks 44 the circuit board 34 to manufacture.

In 18th is a seventh embodiment of the charging socket 10 shown in a sectional frontal view. This embodiment differs from the sixth embodiment only in the configuration of the contacting clips used 32 . In the case shown here are the contact clips 32 than on the circuit board 34 engaging spring contacts, very similar to that in 13 shown embodiment. Instead of such contact clips 32 on the measuring board 50 to fasten, it can also be provided that such contact clips 32 or spring contacts on the circuit board 34 are attached. You can also cut contacts from the circuit board 34 with the measuring board 50 work together.

In 19th is an eighth embodiment of the charging socket 10 shown in a sectional frontal view. In the 20 and 21st the eighth embodiment is shown in a partially sectioned side view and in a top view. The eighth embodiment of the charging socket 10 differs from the sixth and seventh embodiment only in that the two contact clips used 32 not on the measuring board 50 , but instead on the conductor tracks 46 the circuit board 34 are attached.

The assembly of the sixth to eighth embodiment of the charging socket 10 can be done in principle the same. The high-voltage pin 18th is together with the measuring board 50 delivered, which already with the temperature sensor 22 is equipped. After the injection of the high-voltage pin 18th with the plastic material to form the cuff 16 all that remains is the finished measuring board 50 on the cuff 16 to be soldered on. In the case 12th the charging socket 10 becomes the main circuit board 34 inserted and securely positioned. Then the fully assembled high-voltage pin 18th through the circuit board serving as the main circuit board 34 in the housing 12th inserted and then locked. Upon reaching the intended end position of the high-voltage pin 18th then the electrical contact between the circuit board serving as the main board 34 and the measuring board 50 through the respective contact clips 32 manufactured. This enables completely automated production.

In 22 is a ninth embodiment of the charging socket 10 shown in a sectional frontal view. In this embodiment, the cuff has 16 a deepening 52 in the radial direction in which the temperature sensor 22 is recorded, with its radially outward-facing side on a measuring board 50 is arranged, which in turn through the mediation of respective contact clips 32 with respective conductor tracks 46 a circuit board 34 connected is. The high-voltage pin 18th can in turn be encapsulated by the plastic material from which the cuff 16 is trained.

The deepening 52 in the cuff 16 is in the form of a blind hole in which the temperature sensor 22 is arranged. On the cuff 16 are also two retaining lugs 54 molded which is the measurement board 50 reach around and thus fix it.

In 23 is the ninth embodiment of the charging socket 10 shown in a partially sectioned side view. In the present case you can clearly see how the two retaining lugs 54 the measuring board 50 embrace and thus in the recess 52 fix.

In 24th is the area around the temperature sensor 22 the ninth embodiment of the charging socket 10 shown in an enlarged view. To the thermal connection to the cuff 16 to optimize, before inserting the measuring board 50 and the temperature sensor 22 a gap filler 56 or a thermal paste in the recess 52 appropriate.

A major advantage with the ninth embodiment of the charging socket 10 is that the wall thickness of the cuff 16 in the area of deepening 52 is reduced, so that a thermal pad from the high-voltage pin 18th to the temperature sensor 22 is relatively short. The rest of the cuff 16 can be made thick-walled and therefore mechanically more stable. This also makes the cuff possible 16 on the high-voltage pin 18th to stake cold or warm or only to postpone or clip. For the electrical contacting of the temperature sensor 22 are all the variants already mentioned above with regard to the contact clips 32 possible.

In 26 is a possible design of the cuff 16 shown in a top view. Especially at very low ambient temperatures, there is a risk that the high-voltage pin heats up 18th and its associated thermal expansion the cuff 16 bursts open or tears open. This would be the electrical insulation and the defined heat conduction from the high-voltage pin 18th to the temperature sensor 22 no longer guaranteed. In order to prevent this, various variants are conceivable, such as the mechanical stresses that arise in the cuff 16 defined to compensate. In the case shown here, the cuff points 16 just an opening 58 on. This opening 58 allows the cuff to stretch 16 in the radial direction. Regarding the dimensioning and arrangement of the opening 58 It should be noted that all air gaps between the high-voltage and low-voltage areas are observed to avoid flashovers. A good position for opening 58 would be the temperature sensor 22 opposite side of the cuff 16 , as shown here.

In 27 is another possible design of the cuff 16 Shown in a top view to tear or burst the cuff 16 to be able to avoid. In the case shown here, the cuff points 16 a compensation area 60 which, like a spring, extends the high-voltage pin 18th can compensate receiving. It should be noted here that the compensation area is shaped appropriately 60 the the temperature sensor 22 facing area of the cuff 16 always on the high-voltage pin 18th is present.

In 28 is a tenth embodiment of the charging socket 10 shown in a sectional frontal view. This embodiment is a modification of the embodiment in which in the cuff 16 the recess designed as a blind hole 52 was provided. Instead of the recess designed as a blind hole 52 is present in the cuff 16 a through opening 62 intended. In other words, is in the cuff 16 a breakthrough in the form of the passage opening 62 provided in which the temperature sensor 22 is arranged. Within this through opening 62 is a kind of recess for an electrically insulating thermal pad 64 intended. This thermal pad 64 has a sufficiently high dielectric strength to ensure a defined separation of the high-voltage range and the low-voltage range. In addition, the thermal pad 64 sufficiently deformable so that it can be elastically compressed.

In 29 is the tenth embodiment of the charging socket 10 shown in a partially sectioned side view. In 30th is a sequence of steps for assembling the tenth embodiment of the charging socket 10 shown schematically in a partially sectioned side view. In 31 the same sequence of steps for assembling the tenth embodiment of the charging socket is shown schematically in a sectional plan view.

The thermal pad 64 is in the area of the through opening 62 the cuff 16 placed. As you can see, the thermal pad is 64 between the high-voltage pin 18th and the temperature sensor 22 arranged. The cuff 16 can for example have an opening on the side facing away from the temperature sensor, so that the sleeve 16 on the side of the high-voltage pin 18th can be clipped on. The thermal pad 64 lightly compressed and thus closes tightly between the high-voltage pin 18th and the temperature sensor 22 from. Basically, the cuff 16 also be trained differently and on the high-voltage pin 18th to be assembled.

For assembly, it is advantageous if at least one side of the thermal pad is self-adhesive, preferably the side which is the temperature sensor 22 is facing. In this case, the thermal pad 64 first defined on the temperature sensor 22 be glued, which previously in the through opening 62 has been ordered. Then the cuff 16 on the high-voltage pin 18th clipped or otherwise attached.

A mounting direction perpendicular to the longitudinal axis of the high-voltage pin 18th is recommended so that there is no friction on the surface of the thermal pad 64 occurs, which could damage it and counterproductive for its thermal connection to the high-voltage pin 18th would. For the defined axial fixation of the cuff 16 can, for example, slots in the high-voltage pin 18th are provided, which are not shown here.

A major advantage of this embodiment is that you have a relatively large freedom in the choice of material for the cuff 16 because the heat conduction from the high-voltage pin 18th to the temperature sensor 22 solely through the thermal pad 64 is adopted and determined. This thermal pad 64 can have a significantly better thermal conductivity than the cuff 16 exhibit. It also increases the likelihood of an air gap forming between the high-voltage pin 18th and temperature sensor 22 through the use of the elastically deformable thermal pad 64 minimized. The electrical contact between the measuring board 50 and the circuit board serving as the main circuit board 34 is not limited to the variants shown.

The various contacting options of the temperature sensor described 22 can basically be applied to all the described embodiments and can be interchanged. It is essential for all embodiments that the high-voltage pin 18th at least partially circumferentially enclosing cuff 16 who is at least indirectly on the cuff 16 attached temperature sensor 22 and a cuff-side contacting device (for example in the form of that on the cuff 16 printed conductor tracks 30th ) for the temperature sensor 22 said temperature detection unit 14 form. In all cases the temperature sensor 22 relatively close to the high-voltage pin 18th arranged, with a defined orientation and spacing between the temperature sensor in all embodiments 22 and the high-voltage pin 18th given is. This enables reliable temperature measurement on the high-voltage pin 18th take place, with temperature changes on the high-voltage pin 18th can be determined within a short period of time.

Reference list

10th

Charging socket for a motor vehicle

12th

casing

14

Temperature detection unit

16

cuff

18th

High-voltage pin

20

conical recess of the housing

22

Temperature sensor

24th

Contact wreath

26

Silicone gasket

28

Locking element

30th

Conductor on the cuff

32

Contact clip

34

Circuit board

36

radial projection of the cuff

38

Mount on the housing for the radial projection of the cuff

40

Extensions of the contact clip

42

Spring element of the contact clip

44

Conductor on the housing

46

Conductor on the circuit board

48

radially inward indentation on contact clip

50

Measuring board

52

Deepening in the cuff

54

Retaining lugs on the cuff

56

Gapfiller or thermal paste

58

Opening the cuff

60

Compensation area of the cuff

62

Through opening in the cuff

64

Thermal pad

x

Longitudinal direction

y

Cross direction

e.g.

Vertical direction

Claims (15)

Temperature detection unit (14) for a high-voltage connection (10), comprising - A sleeve (16) made of an electrically insulating and thermally conductive plastic, which at least partially surrounds a current-carrying contact element (18) of the high-voltage connection (10); - an at least indirectly attached to the sleeve (16) temperature sensor (22) for temperature detection of the contact element (18); - A contact device connected to the temperature sensor (22) for providing temperature signals of the temperature sensor (22) for an evaluation device. Temperature detection unit (14) after Claim 1 , characterized in that between the sleeve (16) and the contact element (18) a contact ring (24) is arranged, which connects the contact element (18) and the sleeve (16) to each other in a thermally conductive manner. Temperature detection unit (14) after Claim 1 , characterized in that the sleeve (16) rests directly on the contact element (18). Temperature detection unit (14) after Claim 3 , characterized in that the contact element (18) has a polygonal cross section. Temperature detection unit (14) according to one of the preceding claims, characterized in that the contact device has at least one printed conductor (30) printed on the sleeve (16), which is connected to the temperature sensor (22). Temperature detection unit (14) according to any one of the preceding claims, characterized in that the contact device has at least one contact clip (32) attached to the sleeve (16), which is connected at least indirectly to the temperature sensor (22) and for contacting a circuit board (34) or conductor track (44) of the high-voltage connection (10) is designed. Temperature detection unit (14) after Claim 6 , characterized in that the at least one contact clip (32) has an indentation (48) in the radial direction for establishing a snap connection with the printed circuit board (34) of the high-voltage connection (10). Temperature detection unit (14) after Claim 6 , characterized in that the at least one contact clip (32) is designed for wedging on the printed circuit board (34) of the high-voltage connection (10) Temperature detection unit (14) according to one of the preceding claims, characterized in that the sleeve (16) has a radial projection (36) for cooperation with a receptacle (38) on a housing (12) of the high-voltage connection (10) for centering the sleeve (16 ) having. Temperature detection unit (14) according to one of the preceding claims, characterized in that the sleeve (16) completely surrounds the contact element (18) and has a heat compensation area (60) for compensating for thermally induced different expansions of the contact element (18) and the sleeve (16) , or the sleeve (16) for compensating for thermally induced different expansions of the contact element (18) and the sleeve (16) does not completely surround the contact element (18). Temperature detection unit (14) according to one of the preceding claims, characterized in that between the sleeve (16) and the temperature sensor (22) a measuring board (50) is arranged, which is connected to the contact device. Temperature detection unit (14) according to one of the Claims 1 to 10 , characterized in that the sleeve (16) has a recess (52) in the radial direction, in which the temperature sensor (22) is accommodated, which is arranged with its radially outwardly facing side on a measuring board (50) which is connected to the Contact device is connected. Temperature detection unit (14) according to one of the Claims 1 to 10 , characterized in that the temperature sensor (22) is received in a through opening (62) of the sleeve (16) and in the radial direction between an electrically insulating heat-conducting pad (64) resting on the contact element (18) and a measuring board (50) connected to the contact device is arranged. High-voltage connection (10) with a temperature detection unit (14) arranged on the high-voltage connection (10) according to one of the preceding claims. Method for producing a high-voltage connection, in which a temperature detection unit (14) according to one of the Claims 1 to 13 is preassembled at least to the extent that the temperature sensor (22) is fixed relative to the sleeve (16), and only then is the at least partially preassembled temperature detection unit (14) mounted on the high-voltage connection (10) and the temperature sensor (22) is also electrically connected by means of the contact device the high-voltage connection is contacted.

Images