DE202016008372U1 - Connection unit for a device for detecting arcs in a vehicle electrical system - Google Patents

Abstract

Connection unit for a device for detecting arcs in a vehicle electrical system (20) with a coupling unit (12), which is attachable to a contacting point (50) of an electrical load (30) and connected to a detection conductor (11) or connectable, characterized in that the coupling unit (12) has a one-piece or two-piece contact carrier (120) which is provided with a fixing portion (126) for fixing to a holding part in the region of the contacting point (50) and comprises a detection conductor portion (113) arranged such that he after attachment of the coupling unit (12) at the contact point (50) extends at a small distance from this.

Description

The invention relates to a connection unit for a device for arc detection in a vehicle electrical system with a coupling unit, which is attachable to a contact point of an electrical load and connected to a detection conductor or connectable.

An apparatus for arc detection in a vehicle electrical system is in DE 10 2014 108 870 A1 in which contact points are also shown, to which the device for arc detection with detection conductors is connected. Especially at faulty, faulty contact points can develop high temperatures at the resulting voltage drop, especially when it comes to terminal contacts of consumers with high power requirements, the contact points are designed in many cases as screw. If the supply voltage of the vehicle electrical system in the range of 18 V to 60 V, for example at 36 V or 48 V, can at faulty contact points a sufficiently high ignition voltage for the formation of a serial arc form, which leads to fire. By means of from the DE 10 2014 108 870 A1 known device, the formation of an arc can be detected early and a fire by appropriate countermeasure, such as interrupting the supply current can be avoided.

The present invention has for its object to provide a connection unit of the type mentioned, by means of which in the region of a contacting point of a vehicle electrical system, the formation of an arc is detected as reliably as possible.

This object is achieved with the features of claim 1. In this case, it is provided that the coupling unit has a one-piece or two-piece contact carrier, which is provided with a fixing portion for fixing to a holding part in the region of the contacting point and comprises a detection conductor portion which is arranged so that it after attachment of the coupling unit at the contacting point in a small Distance from this runs.

By thus achieved clear determination of the coupling unit with the contact carrier at the contact point and the narrow guide the Detektionsleiterabschnitts along the contact point a occurring at the contact point arc is detected early reliably by means of the device for arc detection, so that to prevent the arc quickly adequate countermeasures, such z. B. shutdown of the supply current, error registration and / or troubleshooting, can be taken.

An advantageous measure for the reliable detection is that the detection conductor section is arranged in the coupling unit so that it extends around the contact point after connection.

For the installation or maintenance and review advantageous further measures are that the coupling unit is provided with a coupling part, via which the detection conductor portion is connected to an incoming and outgoing conductor portion of the detection conductor or connectable.

The construction and attachment of the connection unit at the contact point are further facilitated by the fact that the attachment portion has an opening into which a pin, in particular a bolt, the contacting point can be inserted for fixing. Since the bolt simultaneously represents a connection contact for high currents of a consumer with high power requirements, a mechanically stable and electrically secure attachment is given.

It is further advantageous for the attachment and contacting provided that the attachment portion has an annular washer whose central recess forms the opening and the radially outer peripheral edge is bordered by an insulating body.

An embodiment which is furthermore advantageous for the construction, the installation and the function consists in that the washer is made of metal and can be electrically and mechanically clamped at the contacting point by means of a contact nut.

Furthermore, for a reliable detection, the measures are advantageous in that the detection conductor section is guided around the opening.

For a reliable function and a permanently stable construction further contribute to the measures that the detection conductor portion is embedded in the insulating body.

A measure which is advantageous for additional security also consists in that a temperature fuse, in particular a temperature switch, is assigned to the detection conductor section. With this design can with the same unit with which an arc is detected, even at an early stage (before possibly developing an arc) leading to a temperature increase erroneous Detected contact or a safety-endangering temperature increase are prevented and signaled with an optionally further developed temperature sensor device.

For installation and construction is also advantageous that on the contact carrier, a holding portion with a recessed retaining sleeve, in particular metal bushing, is cast.

Further advantageous design features for the construction and the function consist in that the contact carrier has a cast-in stamped part which forms the detection conductor section, in particular designed as a stamped grid.

If it is provided that the contact carrier is provided with a connecting part for a connecting line, for example, a line arrangement arranged in a consumer for a supply current can be monitored for the generation of an arc.

The invention will be explained in more detail by means of embodiments with reference to the drawings. Show it:

1 a schematic view of an apparatus for arc detection in a vehicle electrical system,

2A an embodiment for a connection unit of the arc detection device in two different perspective views,

2 B a coupling unit of the connection unit according to 2A in perspective view,

3A FIG. 2 shows a further exemplary embodiment of a connection unit of the arc detection device in two different perspective views, FIG.

3B a coupling unit of the connection unit according to 2A in a perspective view from above and from below and

4 a further embodiment of a connection unit of the arc detection device in a perspective view.

1 shows a schematic view of a device 1 for arc detection in the electrical system of a motor vehicle, as in the aforementioned DE 10 2014 108 870 A1 is specified. For monitoring an electrical supply device in a vehicle electrical system 20 on generation of an arc on a supply line including contacting points 50 the same has the device 1 a detection circuit 10 and one about a Einkoppelstelle 103 and via a decoupling point 104 connected detection conductor arrangement with one along the supply lines with positive line 22 or minus line 23 guided detection manager 11 on which one feed 110 and a return 111 and one along an electrical load 30 leading loop 112 includes. The detection manager 11 is also along the contact point 50 (or in a corresponding manner along several contacting sites 50 ) with a detection conductor section 113 led, as explained below on the basis of 2A to 4 is explained in more detail.

The electrical supply device of the vehicle electrical system 20 includes, how out 1 further seen, a supply voltage 21 between a positive pole and a negative pole 24 formed by the vehicle body, for example. The negative lead 23 can also be omitted or formed by other mass points in such a supply device. In particular, at supply voltages in the range of about 18 V to 60 V can build up at faulty points of the supply device as a result of a voltage drop ignition voltages that can lead to an arc and trigger a fire.

The detection circuit 10 to which the detection manager 11 with his feeder 110 and repatriation 111 is connected, has a signal source 100 on, out of the over a series resistor 101 in the order of 100 ohms to some kOhm a defined signal is coupled into the detection conductor. By means of one in the detection circuit 10 still existing comparator 106 the signal is between two measuring points 102 and 105 compared and with a characteristic deviation due to an arc in the supply device 20 is created, this is signaled, so that appropriate measures for suppression and / or display are triggered. 1 also shows that the signal is the signal source 100 is related to a reference potential, which in turn with the potential of the supply device 20 in a fixed relationship. The comparator 106 is via a relevant signal line 108 with the measuring point 102 between the signal source 100 and the series resistor 101 in connection. Further details of design features and operation of the device 1 for arc detection are mentioned in the DE 10 2014 108 870 A1 made, which in this case is additionally referred to in this regard.

In particular, at the contact points 50 the electrical supply device of the vehicle electrical system 20 can occur as a result of improper or faulty contact voltage drops, the ignition voltages with Cause arcing and can cause a fire. In the 2A to 4 are connection units 2 for the device 1 for arc detection in the area of contact points 50 shown, which are designed in particular for consumers connected there with high power consumption or high currents. Such contacting sites 50 of high-current consumers 30 usually have contacting units with screw connections, such as components with motor or electric heaters. At the relevant contact point 50 of the consumer 30 is then usually a contact pin 51 or bolt and a contact nut 52 for clamping one to a supply line or a cable 40 connected cable lug 25 available, like that 2A . 3A and 4 demonstrate. The screw connections at the contacting points 50 can be open or tightly closed versions.

At the in 2A and 2 B shown embodiment, the at the contacting point 50 to be attached or attached coupling unit 12 a one-piece contact carrier 120 on, on which a clutch 121 for making an electrical connection of a feeding and a discharging portion of the detection conductor 11 with a detection conductor section 113 is attached, which in the contact carrier 120 is guided. The coupling 121 is with one on the contact carrier 120 connected or molded coupling part 121.1 in which to that in the contact carrier 120 embedded detection conductor section 113 leading contact sockets or contact pins are arranged to a plug contact for the feeding and outgoing portion of the detection conductor 11 to build. The detection conductor section 113 Can be used as a stamped part 123 , in particular formed as a stamped grid, be executed and on a holding element 122 arranged and by means of an encapsulation 124 be electrically insulated, which also mechanically high stability is obtained. Alternatively, the clutch 121 also for fixed connection between the feeding and outgoing section of the detection conductor 11 with the respective end portions of the detection conductor portion 113 be educated.

As the 2A and especially the 2 B continue to show, is the contact carrier 121 provided with a breakthrough in which a washer 125 is arranged with a central passage opening, which at its outer peripheral edge in the contact carrier 120 enclosed and stable. By means of the metal washer 125 can the contact carrier 120 firmly on the contact pin 51 or bolt by means of the contact nut 52 be clamped so that an electrically good conductive connection at the contact point 50 results. The on the cable 40 the supply device attached cable lug 25 can with respect to the contact mother 52 below the washer 125 or alternatively be arranged above it, wherein in each case the design is designed for a secure contact. The detection conductor section 113 in the contact carrier 120 is at a short distance to the contact pin or bolt 51 guided, so that a resulting arc in the region of the contact point 50 early on a change of the means of the detection circuit 10 detected signal is detected and detected. In the embodiment shown, the detection conductor section 113 spaced around the outer edge of the washer 125 guided. How out 2 B can be seen, the detection conductor section 113 a temperature fuse or a temperature switch 14 be assigned, in addition to the arc and a temperature increase at the contact point 50 to detect, which exceeds a predetermined temperature threshold. The encapsulation 124 can then also the temperature fuse or the temperature switch 14 include and also beneficial to the coupling part 121.1 extend to hold this and the local ends of the detection conductor section 113 embed. The temperature switch 14 can be z. B. is designed so that it opens when too high, the temperature threshold temperature exceeds (for example, between 200 ° C and 300 ° C, eg., From 250 ° C) occurs, wherein for detection, signaling, evaluation and / or storing a temperature sensor device may be present.

In the in the 3A and 3B shown further embodiment of the connection unit 2 is on the contact carrier 120 the coupling unit 12 laterally a holding section 15 arranged, which also from the encapsulation 124 is included and a holding breakthrough with a metal bushing 150 having. By means of the holding section 15 may also be integrally formed contact carrier 120 be set to an assigned vehicle component. As in the previous embodiment, the detection conductor section 113 at a short distance around the contact point 50 led to one in the area of the contact point 50 reliably and promptly detect the resulting arc. In this embodiment, the cable lug 25 between the contact carrier 120 and the contact mother 52 arranged, which assembly or maintenance may be favored.

How out 3B it can be seen in this embodiment, at the underside of the contact carrier facing a respective vehicle component 120 a connection cable 16 with a connecting part 161 and a seal 162 arranged. About the connection line 16 For example, another detection conductor section 113 be guided in the relevant vehicle component to detect the formation of an arc therein. Further features of the in the 3A . 3B shown connection unit 2 essentially correspond to those of the previous embodiment.

Also at the in 4 shown yet another embodiment of a connection unit 2 The components provided with the same reference numerals correspond to the previously described embodiments. In contrast to the preceding embodiments is on the coupling 121 a feed-in point 13 for a feed part 60 arranged, which at the clutch 121 can be inserted to z. B. to feed or remove a measurement signal. About the feed part 60 can be an additional evaluation of the contact point 50 be made individually.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102014108870 A1 [0002, 0002, 0024, 0026]

Claims (12)

Connection unit for a device for detecting arcs in a vehicle electrical system ( 20 ) with a coupling unit ( 12 ), which at a contact point ( 50 ) of an electrical consumer ( 30 ) and with a detection conductor ( 11 ) is connected or connectable, characterized in that the coupling unit ( 12 ) a one-piece or two-piece contact carrier ( 120 ), which with a mounting portion ( 126 ) for fixing to a holding part in the region of the contacting point ( 50 ) and a detection conductor section ( 113 ) which is arranged so that it after mounting the coupling unit ( 12 ) at the contact point ( 50 ) runs a short distance from this. Terminal unit according to claim 1, characterized in that the detection conductor section ( 113 ) in the coupling unit ( 12 ) is arranged so that it after connection to the contact point ( 50 ) runs around. Connection unit according to claim 1 or 2, characterized in that the coupling unit ( 12 ) with a coupling part ( 121.1 ), via which the detection conductor section ( 113 ) with an incoming and an outgoing conductor section of the detection head ( 11 ) is connected or connectable. Terminal unit according to one of the preceding claims, characterized in that the fixing section ( 126 ) has an opening into which a pin, in particular a bolt, the contacting point ( 50 ) can be used. Terminal unit according to claim 4, characterized in that the fixing section ( 126 ) an annular washer ( 125 ), whose central recess forms the opening and whose radially outer peripheral edge is bordered by an insulating body. Connection unit according to claim 5, characterized in that the washer ( 125 ) consists of metal and at the contact point ( 50 ) electrically conductive and mechanically by means of a contact nut ( 52 ) is clamped. Terminal unit according to one of claims 4 to 6, characterized in that the detection conductor section ( 113 ) led to the breakthrough. Terminal unit according to one of Claims 5 to 7, characterized in that the detection conductor section ( 113 ) is embedded in the insulating body. Terminal unit according to one of the preceding claims, characterized in that the detection conductor section ( 113 ) a temperature fuse, in particular temperature switch ( 14 ), assigned. Connection unit according to one of the preceding claims, characterized in that on the contact carrier ( 120 ) a holding section ( 15 ) with a recessed retaining bush, in particular metal bushing ( 150 ) is poured. Connection unit according to one of the preceding claims, characterized in that the contact carrier ( 120 ) a cast-in stamped part ( 123 ) having the detection conductor section ( 113 ), in particular designed as a stamped grid. Connection unit according to one of the preceding claims, characterized in that the contact carrier ( 120 ) with a connecting part ( 161 ) is provided for a connection line.

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