NL2006706C2 - Electronic interface device for connecting a trailer lighting system to a vehicle lighting system. - Google Patents
Electronic interface device for connecting a trailer lighting system to a vehicle lighting system. Download PDFInfo
- Publication number
- NL2006706C2 NL2006706C2 NL2006706A NL2006706A NL2006706C2 NL 2006706 C2 NL2006706 C2 NL 2006706C2 NL 2006706 A NL2006706 A NL 2006706A NL 2006706 A NL2006706 A NL 2006706A NL 2006706 C2 NL2006706 C2 NL 2006706C2
- Authority
- NL
- Netherlands
- Prior art keywords
- lighting system
- cable
- towbar
- circuit board
- vehicle
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
- H05K1/0204—Cooling of mounted components using means for thermal conduction connection in the thickness direction of the substrate
- H05K1/0206—Cooling of mounted components using means for thermal conduction connection in the thickness direction of the substrate by printed thermal vias
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3677—Wire-like or pin-like cooling fins or heat sinks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/51—Fixed connections for rigid printed circuits or like structures
- H01R12/53—Fixed connections for rigid printed circuits or like structures connecting to cables except for flat or ribbon cables
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10166—Transistor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/10287—Metal wires as connectors or conductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3405—Edge mounted components, e.g. terminals
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Description
Electronic interface device for connecting a trailer lighting system to a vehicle lighting system
FIELD OF THE INVENTION
The invention relates to an electronic interface device for connecting an auxiliary lighting system, such as a trailer lighting system, to a vehicle lighting system of a vehicle and driving the auxiliary lighting system from the vehicle lighting system.
5 BACKGROUND OF THE INVENTION
When connecting e.g. a trailer to a vehicle, it is required to connect the trailer lighting system to the vehicle lighting system in such a manner that the lamps of the trailer are operated in accordance with the corresponding lights of the vehicle. For example, the rear lights, the left and right indicator lights and the brake light(s) of the trailer have to illuminate 10 together with the rear lights, the left and right indicator lights and the brake light(s) of the vehicle to which the trailer is connected. It may further be required for some lamps that specific lamps are only illuminated on the trailer, while the corresponding lamp of the vehicle remains dark. For example, legislation may require that the fog lamp of the vehicle is not illuminated once a trailer is connected to the vehicle. Similarly, when other devices are 15 connected to the vehicle’s towbar, such as a bicycle carrier rack, the bicycle rack may hamper visibility of the vehicle’s light, and it may be necessary to also connect an auxiliary lighting system in a similar manner as when connecting a trailer.
Hereto, it is known to use an electronic interface device for connecting an auxiliary lighting system, such as a trailer lighting system, to a vehicle lighting system of a 20 vehicle and driving the auxiliary lighting system from the vehicle lighting system. In known systems, the interface device may comprise an input power terminal for electrically connecting to a power supply circuit in the vehicle, an output power terminal for electrically connecting to the auxiliary lighting system, a control terminal for electrically connecting to the vehicle lighting system for receiving a control signal corresponding to an operation of a 25 lamp of the vehicle lighting system, a semiconductor switching device electrically connected to the input power terminal and to the control terminal for selectively connecting the output power terminal to the input power terminal in dependence on the control signal for operating a lamp of the auxiliary lighting system corresponding to the lamp of the vehicle lighting 2 system, and a towbar cable extending from a towbar cable end to the output power terminal. The input power terminal may e.g. be a cable end of a 2,5 mm2 power cable that is connected in the vehicle’s fuse box to the vehicle’s power supply circuit to obtain power from the vehicle’s battery. The output power terminal is provided at the other end of towbar cable and 5 connects to a pin in a towbar socket connector, such as e.g. the corresponding pin in a seven-pin connector defined in the seven-pin trailer connection system ISO 1724 or a thirteen-pin connector defined in the thirteen-pin trailer connection system DIN 11446:2004, or extended or alternative connectors. The control terminal may e.g. be a control cable end connecting to the vehicle’s lighting control signal lines, e.g. using T-shaped connectors, such as an 10 analogue line or a CAN-bus. The semiconductor switching device may in particular be a Power Transistor, such as a MOSFET power transistor. In known interface devices, the semiconductor switching device is arranged on a printed circuit board (PCB) in a module housing. The control cable, the towbar cable and the power cable are connected to the printed circuit board via detachable connectors, e.g. with female cable connectors provided at the 15 cables that connect to respective male board connectors provided on the printed circuit board. The printed circuit board is provided with conductive copper traces which connect the male board connectors to the semiconductor switching device. Some known interface devices directly connect the control cable with its control signal to the semiconductor switching device, while other known interface devices connect the control cable with its control signal 20 to the semiconductor switching device via a microcontroller which may e.g. transform the control signal to a signal suitable for operating the semiconductor switching device. Typically, a lamp of a vehicle as well as a lamp of a trailer is operated at the battery voltage of the vehicle, i.e. at 9 - 14V, and a current in the range of 5 - 7 A.
During operation, the semiconductor switching device and other electrical 25 components in the module housing may generate a significant amount of heat. Combined with the environmental conditions in a vehicle, the temperature in the module may hereby increase to temperatures of e.g. 80 - 140 °C. A robust operation of a semiconductor switching device, such as a power transistor, under these conditions may require the use of high-graded devices, which may be costly. This may also apply to the other electrical 30 components. Further, the temperatures achieved during operation may limit the possible positions in the vehicle where the module can be placed. Also, the temperatures achieved during operation may impose a practical limit as to size of the interface device or one of its components, such as e.g. the module housing.
3
SUMMARY OF THE INVENTION
It would be advantageous to have an improved interface device. In particular may it be a wish to have an interface device which is cheaper. It may be additional or alternative wishes to be more robust and/or more compact. To better address at least one of 5 these wishes, a first aspect of the invention provides an electronic interface device for connecting an auxiliary lighting system, such as a trailer lighting system, to a vehicle lighting system of a vehicle and driving the auxiliary lighting system from the vehicle lighting system, the interface device comprising: an input power terminal for electrically connecting to a power supply 10 circuit in the vehicle, an output power terminal for electrically connecting to the auxiliary lighting system, a control terminal for electrically connecting to the vehicle lighting system for receiving a control signal corresponding to an operation of a 15 lamp of the vehicle lighting system, a semiconductor switching device electrically connected to the input power terminal and to the control terminal for selectively connecting the output power terminal to the input power terminal in dependence on the control signal for operating a lamp of the auxiliary lighting system 20 corresponding to the lamp of the vehicle lighting system, a printed circuit board having a first side and a second side opposite of the first side, the semiconductor switching device being arranged on a placement area on the first side of the printed circuit board, 25 the printed circuit board having a plurality of vias extending through the printed circuit board from at least part of the placement area on the first side to an output interface area on the second side and electrically connecting the semiconductor switching device to the output interface area, and 30 - a towbar cable extending from a towbar cable end to the output power terminal, the towbar cable end being soldered onto the output interface area and electrically connected to the output interface area.
By having the plurality of vias extending through the printed circuit board from at least part of the placement area on the first side to the output interface area on the 4 second side and electrically connecting the semiconductor switching device to the output interface area, and having the towbar cable end being soldered onto the output interface area and electrically connected to the output interface area, the semiconductor switching device is connected with a reduced electrical resistance as well as a reduced thermal resistance to the 5 towbar cable. The temperature levels reached in the semiconductor switching device may hereby be reduced. The reduced electrical resistance may in particular reduce the amount of dissipated heat because of reduced resistive losses. The reduced thermal resistance may in particular improve the heat transfer away from the semiconductor switching device. The reduction if the electrical and thermal resistance may e.g. result from the reduction of the 10 length, or even substantially removal, of the conductive path through relatively thin layers on the printed circuit board from the semiconductor switching device to the towbar cable end, as no routing of the high currents is anymore necessary if the towbar cable end is substantially only connected to the semiconductor switching device via the vias. Also, the use of a solder connection to replace the male-female connectors may correspond to a reduced contact 15 resistance and thereby contribute to the reduction of the electrical and thermal resistance.
In an embodiment, the printed circuit board comprises a cutout extending from the first side to the second side of the printed circuit board and the output interface area comprises an output interface area extension extending to the cutout, the towbar cable end being received in the cutout, and 20 the towbar cable end being soldered onto the output interface area extension of the output interface area and electrically and thermally connected to the output interface area extension of the output interface area.
The cutout may facilitate the positioning of the towbar cable end relative to the output interface area. Soldering the towbar cable end while being received in the cutout 25 may improve the mechanical strength and/or the thermal resistance of the soldering connection. In this embodiment, the towbar cable end is preferably received substantially perpendicular to the printed circuit board. The cutout may e.g. be a cutout provided at an edge of the printed circuit board, allowing to position the towbar cable in the cutout sideways. The cutout may alternatively be e.g. a though-hole away from the edge of the printed 30 circuit board, allowing to position the towbar cable in the cutout by passing it through the hole from e.g. the first side of the printed circuit board until it projects out on the second side.
In a further embodiment, the placement area comprises a placement area extension extending to the cutout, the towbar cable end further being soldered onto the placement area extension of the placement area and electrically and thermally connected to the placement 35 area extension of the placement area.
5
The towbar cable end is thus soldered onto the printed circuit board on both sides of the printed circuit board, which may further improve the easy of manufacturing and/or the strength of the connection, and/or the thermal resistance of the soldering connection.
5 In an embodiment, the cutout is engaged with the towbar cable end with a clamping force.
The cutout may e.g. be shaped so as to provide a clamping force when the towbar cable end is received in the cutout. The clamping force may hold the towbar cable end in position while soldering. The clamping force may further improve the mechanical strength 10 of the connection.
The plurality of vias may have a total cross-section in a range of 0,5 - 5,0 mm2, such as in a range of 1,0 - 2,0 mm2, for example about 1,5 mm2. Each of the vias may be substantially filled with copper. A plurality of copper vias with such cross-section may provide a particularly suitable thermal conductivity for leading heat away from the 15 semiconductor switching device.
The plurality of vias extend preferably through the printed circuit board from substantially the whole of the placement area to the output interface area. Hereby, the thermal and electrical resistance of the connection through the printed circuit board may be reduced.
The placement area preferably comprises a footprint of the semiconductor 20 switching device. The placement area may correspond to the footprint of the semiconductor switching device. Hereby, thermal contact may be improved relative to the complete area of the semiconductor switching device that faces the printed circuit board.
In an embodiment, the electronic interface device further comprises a power supply cable extending from the input power terminal to a supply cable end, the supply cable 25 end being soldered to an input interface area on the first side, and the input interface area being electrically connected to the semiconductor switching device via a conductive structure arranged on the first side of the printed circuit board.
Hereby, the electrical and/or thermal resistance of the power supply and power distribution may be improved in an analogous manner as described above in relation to the 30 towbar cable connection, which may further contribute to a reduced thermal load.
Further, it may be advantageous e.g. for reasons of achievable compactness of the printed circuit board if the input cable is soldered on the same side on the printed circuit boards as the semiconductor switching device and with the input cable and towbar cable being soldered on the opposite sides of the printed circuit board.
6
In an alternative embodiment, the electronic interface device further comprises a power supply cable extending from the input power terminal to a supply cable end, the supply cable end being soldered to an input interface area on the second side, and the input interface area being electrically connected to the semiconductor switching device via a 5 conductive structure on the second side of the printed circuit board and a further plurality of vias extending from the second side of the printed circuit board to the first side.
Hereby, the electrical and/or thermal resistance of the power supply and power distribution may be improved in an analogous manner as described above in relation to the towbar cable connection, which may further contribute to a reduced thermal load.
10 Further, electrical design may be facilitated in view of the input cable being soldered on an opposite side on the printed circuit board as the semiconductor switching device and with the input cable and towbar cable being soldered on the same side, i.e., the second side, of the printed circuit board. For example, all other electronic circuitry, such as a microcontroller, control signal distribution and monitor functions may be placed and routed 15 on the first side, together with the semiconductor switching device. Alternatively, the other electronic circuitry may e.g. be distributed over both the first and the second side, which may reduce the size of the printed circuit board.
In a further embodiment, the printed circuit board comprises an input cutout extending from the first side to the second side of the printed circuit board and the input 20 interface area comprises an input interface area extension extending to the input cutout, the supply cable end being received in the input cutout, and the supply cable end being soldered onto the input interface area extension of the input interface area and electrically and thermally connected to the input interface area extension of the input interface area.
The input cutout may facilitate the positioning of the supply cable end relative 25 to the input interface area. Soldering the supply cable end while being received in the input cutout may improve the mechanical strength and/or the thermal resistance of the soldering connection.
In a further embodiment, the conductive structure comprises a conductive layer arranged on the printed circuit board and defining an input power plane.
30 The input power plane may thus act as a shielding against external disturbances.
In an embodiment, the conductive layer has a thickness in a range of 10 - 50 pm, preferably in the range of 20 - 40 pm.
7
With such relatively thin layers, cost of the interface device may be reduced. As a comparison, in known systems, conductive layers of a thickness in the range of 75 - 150 pm are used.
In an embodiment, the towbar cable has a cross-section on a range of 1,0 - 5,0 5 mm2, preferably in a range of 1,0 - 2,5 mm2.
This may provide a good thermal conductivity for conducting heat away from the output interface area and, via the plurality of vias, the semiconductor device. The towbar cable preferably is made of a metal or a metal allow, such as copper or a copper-alloy.
In an embodiment, the plurality of vias has a total conductive cross-section in 10 a range of 1,0 - 5,0 mm2, preferably in a range of 1,0 - 2,5 mm2.
This may provide a good thermal conductivity for conducting heat away from the semiconductor switching device to the output interface area.
In an embodiment, the electronic interface device further comprises: a further output power terminal, 15 - a further control terminal for electrically connecting to the vehicle lighting system for receiving a further control signal corresponding to an operation of a further lamp of the vehicle lighting system, a corresponding further semiconductor switching device electrically connected to the input power terminal and to the further control terminal 20 for selectively connecting the further output power terminal to the input power terminal in dependence on the further control signal for operating a further lamp of the auxiliary lighting system corresponding to the further lamp of the vehicle lighting system, the corresponding further semiconductor switching device arranged on 25 the first side on a further placement area of the printed circuit board, a corresponding further plurality of vias extending through the printed circuit board from at least part of the further placement area on the first side to a further output interface area on the second side and electrically and thermally connecting the further semiconductor switching device to 30 the further output interface area, a corresponding further towbar cable extending from a further towbar cable end to the further output power terminal, the further towbar cable end being soldered onto the further output interface area and electrically and thermally connected to the further output interface area.
8
The electronic interface device may thus be suitable for connecting and driving a plurality of different lamps in the auxiliary lighting system, such a brake light from the first output power terminal and a rear light from the second output terminal.
In a further embodiment, the towbar cable and the further towbar cable are 5 arranged in a cable harness.
The towbar cable and further towbar cable may thus be conveniently handled.
In an embodiment, the control terminal is arranged to electrically connect to a vehicle signal bus of the vehicle lighting system to receive the control signal from the vehicle signal bus.
10 The interface device may thus accept control signals from the vehicle’s signal bus. The interface device may comprise a bus controller, e.g. a microcontroller, arranged to receive the control signal from the control terminal in a form as provided by the vehicle signal bus, and e.g. transform this control signal into a form suitable for operating the semiconductor device. The vehicle signal bus may e.g. be a CAN-bus and the bus controller 15 may e.g. be a CAN-bus controller.
This may particularly be advantageous in an embodiment for connecting a plurality of lamps. Therefore, in an embodiment, are one and the same control terminal and arranged to electrically connect to the vehicle signal bus of the vehicle lighting system to receive the control signal as well as the further control signal from the vehicle signal bus. The 20 bus controller may, in this embodiment, be arranged to the control signal and the further control signal and from the control terminal in a form as provided by the vehicle signal bus, and e.g. transform the control signal and the further control signal into signal forms suitable for operating the semiconductor device and the further semiconductor device.
In an embodiment, the further control terminal is arranged to electrically 25 connect to a vehicle break light control line of the vehicle lighting system via a break control line to receive the further control signal.
The further semiconductor switching device may thus operate the break light of the auxiliary lighting system substantially directly from the vehicle break light control line, even when the other lamps of the vehicle and the auxiliary lighting system are operated via a 30 CAN-bus or another signal bus. The well-functioning of the brake light may thus be better guaranteed than if it would be operated from a further control signal provided on the same signal bus as the control signal(s) for the other lamps.
In an embodiment, a towbar socket is moulded-on to the towbar cable or the cable harness.
9
Hereby, the mechanical robustness of the mechanical connection from the output cable to the towbar socket may be improved.
A second aspect provides a lighting system comprising a vehicle lighting system, an auxiliary lighting system, such as a trailer lighting system, and an interface device 5 according to any one of the embodiments described above, the interface device electrically connecting the auxiliary lighting system to the vehicle lighting system and arranged to drive the auxiliary lighting system from the vehicle lighting system.
A third aspect provides a vehicle comprising a vehicle lighting system and an interface device according to any one of the embodiments described above, the electronic 10 interface device being arranged to connect an auxiliary lighting system, such as a trailer lighting system, to the vehicle lighting system of the vehicle and to, when connected, drive the auxiliary lighting system from the vehicle lighting system.
A fourth aspect provides a method of manufacturing an electronic interface device according to any one of the embodiments described above for connecting an auxiliary 15 lighting system, such as a trailer lighting system, to a vehicle lighting system of a vehicle and driving the auxiliary lighting system from the vehicle lighting system. According to the fourth aspect, the method comprises: providing a printed circuit board having a first side and a second side opposite of the first side, 20 a semiconductor switching device being arranged on a placement area on the first side of the printed circuit board , the printed circuit board having a plurality of vias extending through the printed circuit board from at least part of the placement area on the first side to an output interface area on the second side and electrically and 25 thermally connecting the semiconductor switching device to the output interface area, connecting an input power terminal to the printed circuit board, the input power terminal being arranged to electrically connect to a power supply circuit in the vehicle, 30 - connecting an output power terminal to the printed circuit board, the output power terminal being arranged to electrically connect to the auxiliary lighting system, and connecting a control terminal to the printed circuit board, the control terminal being arranged to electrically connect to the vehicle lighting 10 system for receiving a control signal corresponding to an operation of a lamp of the vehicle lighting system, whereby the semiconductor switching device is electrically connected to the input power terminal and to the control terminal, the semiconductor 5 switching device being arranged to selectively connect the output power terminal to the input power terminal in dependence on the control signal for operating a lamp of the auxiliary lighting system corresponding to the lamp of the vehicle lighting system; wherein connecting the output power terminal to the printed circuit board comprises: 10 - providing a towbar cable extending from a towbar cable end to a towbar cable terminal, and soldering the towbar cable end onto the output interface area, whereby the towbar cable end is electrically and thermally connected to the output interface area and the towbar cable terminal forms the output power 15 terminal.
Hereby, an interface device is provided which may have improved electrical and thermal resistance between the semiconductor switching device and the towbar cable, which may result in a reduced heat dissipation and an improved heat conduction away from the semiconductor switching device to the towbar cable.
20 In an embodiment, the printed circuit board comprises a cutout extending from the first side to the second side of the printed circuit board and the output interface area comprises an output interface area extension extending to the cutout, and connecting the output power terminal to the printed circuit board comprises arranging the towbar cable end in the cutout, and soldering the towbar cable end onto the output interface area extension of 25 the output interface area, whereby the towbar cable end is electrically and thermally connected to the output interface area extension of the output interface area.
Hereby, soldering the towbar cable end is facilitated and an improved connection and/or an improved thermal conductivity away from the semiconductor switching device may be provided.
30 In an embodiment, the placement area comprises a placement area extension extending to the cutout, and connecting the output power terminal to the printed circuit board comprises soldering the towbar cable end onto the placement area extension of the placement area, whereby the towbar cable end is electrically and thermally connected to the placement area extension of the placement area.
11
Hereby, an further improved connection and/or an further improved thermal conductivity away may be provided.
In an embodiment, arranging the towbar cable end in the cutout comprises arranging the towbar cable in a handling device, the handling device comprising a thermal 5 conductive material and the towbar cable being arranged with its cladding in contact with the thermal conductive material, and receiving the towbar cable end of the towbar cable in a position in the cutout, and the method comprises holding the towbar cable in the position in the cutout using the handling device while soldering the towbar cable end.
Hereby, the handling of the towbar cable during soldering may be facilitated. 10 Also, the integrity of the towbar cable may be improved, e.g. because of a reduced risk of solder penetration into the towbar cable.
Further advantages of the second, third and fourth aspects may be derived from the description given above for embodiments of the first aspects.
It will be appreciated by those skilled in the art that two or more of the above-15 mentioned embodiments, implementations, and/or aspects of the invention may be combined in any way deemed useful.
Modifications and variations of the lighting system, the vehicle and/or the method, which correspond to the described modifications and variations of the electronic interface device, can be carried out by a person skilled in the art on the basis of the 20 present description.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other aspects of the invention are apparent from and will be elucidated with reference to the embodiments described hereinafter. In the drawings,
Fig. 1 schematically illustrates a lighting system comprising a vehicle lighting 25 system, a trailer lighting system and an interface device;
Fig. 2 and Fig. 3 schematically illustrate an interface device according to the prior art;
Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8 schematically illustrate embodiments of interface devices according to embodiments; 30 Fig. 9 schematically illustrates a method of manufacturing according to an embodiments; and
Fig. 10 schematically illustrates an interface device according to an embodiment.
12
DETAILED DESCRIPTION OF EMBODIMENTS
Fig. 1 schematically illustrates a lighting system 100 comprising a vehicle lighting system 110 of a vehicle, a trailer lighting system 210 of a trailer and an interface device 300 for connecting the trailer lighting system 210 to the vehicle lighting system 110.
5 The vehicle lighting system 110 comprises a vehicle power and control system 112 connected to a battery (not shown), to a plurality of vehicle lamps 120 with respective vehicle lamp switched power lines L, 58L, 54, 54g, 58R and R, and to a vehicles common with ground line 31. Herein, the vehicle lamp switched power lines L, 58L, 54, 54g, 58R and R and ground line 31 are indicated with commonly used reference symbols, wherein L 10 indicates a left indicator light, 58L indicates a left rear light, 54 indicates a brake light, 54g indicates a fog light, 58R indicates a right rear light, R indicates a right indicator light and 31 indicates a ground line. The vehicle power and control system 112 comprises, in the example shown, a CAN-bus for communicating control signals through the vehicle, including control signals for operating the lamps. However, other control signal means may be provided 15 alternatively or additionally. For example, the vehicle switched power line 54, corresponding to the operation of the brake light, may directly controlled from the break pedal.
The trailer lighting system 210 has a plurality of trailer lamps 220 which are connected with trailer lamp power lines L, 58L, 54, 54g, 58R and R and a trailer common line 31 to respective trailer terminals 212. It is remarked that the same reference numbers are 20 used for the trailer lamp power lines as for the vehicle, as this is common practice in the field of trailer lighting. Where a specific reference to a trailer lamp power line is meant, an additional “_T” may be added to the reference symbols, e.g. L_T indicating the left indicator light of the trailer. The trailer terminals 212 are arranged in a plug, in this example a 7-pole plug according to the seven-pin trailer connection system ISO 1724.
25 The interface device 300 is installed in the vehicle. The interface device 300 has an input cable harness 310, an output cable harness 370 (which may also be referred to as a towbar cable harness 370), and an interface module 360. The interface module 360 is connected to the vehicle lighting system 110 with the input cable harness 310. The input cable harness connects with a bidirectional communication line 315a, 315b, a 12Y - 15A 30 supply line 330a, a 12V - 5A supply line 330b, a brake control line 354, a signal bus 340 and a ground line 331. The 12V - 15A supply line 330a and the 12V - 5A supply line 330b may together be referred to as supply line 330. The ground line is provided with an eye 332 for connecting the ground line to the vehicle’s chassis. The output cable harness 370 connects the interface module 360 to a towbar socket, in this example a 7-pole socket 380 according to 13 the seven-pin trailer connection system ISO 1724. The 7-pole socket has seven pins 382, labeled as L, 58L, 54, 54g, 58R, R and 31, again using same reference numbers as for the vehicle power lines and trailer power lines in view of the common practice in the field of trailer lighting. The pins 382 are arranged to receive the corresponding trailer terminals 212.
5 In the example given, the signal bus is a CAN-bus. In the example give, the brake control line 354 is directly taken from the vehicle switched power line 54 corresponding to the operation of the brake light.
Fig. 2 schematically illustrates an interface module 360 according to the prior art. The input cable harness 310 and the output cable harness 370 are only drawn in part in 10 order not to obscure the figure. The supply line 330 of the input cable harness will further be referred to as power supply cable 330. One end 3302 of the power supply cable is received in an input cable connector 3140. This one end may further be referred to as the supply cable end. The other end (not shown in Fig. 2) of the power supply cable 330 that is connected to the vehicle lighting system may further be referred to as input power terminal 3301. One end 15 of the signal bus 340 is received in the input cable connector 3140. This one end may further be referred to as the input signal bus end. The other end of the signal bus 340 that is connected to the vehicle lighting system may further be referred to as control terminal 3401. In Fig. 2, only four of the seven lines of the output cable harness 370 are drawn, of which one line is labeled as 371. Line 371 of the output cable harness may further be referred to as 20 towbar cable 371. One end 3712 of the towbar cable 371 is received in an output cable connector 3740. This end 3712 may further be referred to as the towbar cable end 3712. The other end (not shown in Fig. 2) of the towbar cable in the towbar socket may further be referred to as output power terminal 3711. In the example shown, the input cable connector 3140 and the output cable connector 3740 are drawn as two separate connectors, but prior art 25 devices are also known wherein the two connectors are formed as a single physical device.
The interface module 360 comprises a printed circuit board 3600 having a first side 3601 and a second side 3602. The interface module 360 carries an input board connector 3640 wherein the input cable connector 3140 is received. The interface module 360 carries an output board connector 3670 wherein the output cable connector 3740 is received. An 30 interface controller unit 3620 is arranged on the first side 3601 and connected via board input control lines 3641 to the input board connector 3640 as well as, with a plurality of control lines 3640, to respective control inputs of respective semiconductor switching devices 3610 of a respective plurality of semiconductor switching devices, each in the form of a power transistor. Each of the semiconductor switching devices 3610 is connected with input power 35 lines 3632 to the supply cable via the input board connector 3640 and the input cable 14 connector 3140. Each of the semiconductor switching devices 3610 is connected with output power lines 3612 to respective towbar cable end 3712 via the output board connector 3670 and the output cable connector 3740. The interface controller unit 3620 is connected with board control lines 3643 semiconductor switching devices 3610 for selectively switching the 5 each of the semiconductor switching devices 3610 in dependence on a respective control signal received or derived from the signal bus 340. The selective switching relates to, as the skilled person will understand, switching between a first switching state and a second switching state. In the first state, the respective semiconductor switching device 3610 provides its output power lines 3612 with the supply voltage received from the input power 10 lines 3632, for supplying the corresponding pin 382 of the towbar socket 380 with a voltage and, if a lamp is connected, a current for turning on the lamp in accordance with the control signal. In the second state, the respective semiconductor switching device 3610 sets its output pin connected to the output power lines 3612 into a high-impedance state wherein a pulldown resistor (not shown) pulls the output power lines 3612 substantially to the common 15 voltage to turn off the lamp.
Fig. 3 schematically illustrates a cross-sectional detail of the interface module 360 of the prior art device of Fig. 2. The detail shows one of the semiconductor switching devices 3610, arranged on a placement area 3630 on the first side 3601 of the PCB and connected via vias 3614 extending through the PCB to its board control line 3643, provided 20 as a trace on the second side 3602 of the PCB. The input power lines 3632 and its connection to the semiconductor switching device 3610 is not visible in the cross-section shown. The output power lines 3612 is provided on the first side 3601 and is connected to a lead 3613 semiconductor switching devices 3610, from where it extends as a trace on the PCB to the output board connector 3670. As shown, the output board connector 3670 is mechanically 25 and electrically connected to the PCB 3600 and substantially comprises a metal male part, which is received in a metal female part of the output cable connector 3740. The metal female part of the output cable connector 3740 is connected to the towbar cable end 3712 of the towbar cable 371.
In the prior art device, the thickness of traces 3612, 3642 and other traces on 30 the PCB is about 75 pm.
The semiconductor switching devices 3610 on the known device of Fig. 1 and Fig. 2 are high-class devices, operated typically at temperatures of 120 - 140 °C and designed to withstand the temperatures up to about 160 °C in order to be sufficiently robust against the temperatures that may occur during use, e.g. in a moving car with all lights on and 35 a relatively large amount of heat generation due to dissipation in the device, and especially in 15 the semiconductor switching devices 3610 as well as in the traces on the PCB forming the output power lines 3612. The inventors have found that, under such conditions, the generated heat is lead away only to a very small amount by convection or radiation from the relatively small surface of the semiconductor device 3610 itself. The inventors have also found that the 5 generated heat is partially conducted via the traces on the PCB forming the output power lines 3612, the output board connector 3670 and the output cable connector 3740 to the towbar cable 371.
Fig. 4 and Fig. 5 schematically illustrate an interface module 360 according to an embodiment. The interface module 360 shown in Fig. 4 and Fig. 5 differs from that shown 10 in Fig. 3 and 4 in at least the following manner.
The towbar cable end 3712 is not connected to the printed circuit board 3600 via an output board connector 3670 and output cable connector 3740, but is directly soldered onto an output interface area 3713 on the second side 3602 of the PCB 3600. The output interface area 3713 is provided immediately opposite the placement area 3630 of the 15 semiconductor switching devices 3610 on the first side 3601. The placement area 3630 and the output interface area 3713 are connected with a plurality of vias 3714. Hereby, the plurality vias 3714 provides a path with a low electrical as well as a low thermal resistance from the placement area 3630 to the output interface area 3713, and, thereby, from the semiconductor switching device 3610 to the towbar cable 371. This may reduce heat 20 generation because of lower resistive losses and may at the same time improve the transfer of heat away from the semiconductor switching device 3610 to the towbar cable 371. The plurality of vias may e.g. be filled with copper and comprise a total cross-section of about 1,5 mm2. The semiconductor switching device 3610 is, in the example of Fig. 5, a p-type FET in a surface mount package with its switched output provided via a substrate 361 la at a bottom 25 side of the semiconductor switching device 3610, its supply voltage provided via a lead 3613a and a control input provided via a further lead (not shown).
Another difference is that the supply cable end 3302 is not connected to the printed circuit board 3600 via an input board connector 3640 and an input cable connector 3140, but is directly soldered onto an input interface area 3633. A further plurality of vias 30 3634 is extending through the PCB in the vicinity of the semiconductor switching device 3610 from the input interface area 3633 (optionally via a intermediate trace 3632) to an input power connection trace 3635 on the first side of the PCB and from there connected to the lead 3613a of the semiconductor switching device 3610.
In Fig. 5, the input interface area 3633 is arranged on the second side 3602, 35 whereby the supply cable end 3302 is soldered to the PCB on the same side as the towbar 16 cable 371. Board control lines 3643 (see Fig. 4; not shown in Fig. 5) are arranged on the same side as the semiconductor switching device 3610.
In the device according to this embodiment, the thickness of traces 3643, 3633, 3632 and other traces on the PCB is about 35 μιη, but could in alternative 5 embodiments be another thickness in the range of 20 - 50 μιη, but could also be larger, such as 75 μιη. A thickness of 75 μιη may be advantageous in terms of e.g. further reducing the resistive losses. A thickness of 20 - 35 μιη may be advantageous in terms of e.g. PCB manufacturing cost.
Fig. 6 schematically illustrates an interface module 360 according to an 10 alternative embodiment. The interface module 360 shown in Fig. 6 differs from that shown in Fig. 4 and Fig. 5 in at least that, in Fig. 6, the input interface area 3633 is arranged on the first side 3601, whereby the supply cable end 3302 is soldered to the PCB on the opposite side as the towbar cable 371. The semiconductor device 3610 is an n-type FET in a surface mount package with its supply voltage provided via a substrate 3611b at a bottom side of the 15 semiconductor switching device 3610, its switched output provided via a lead 3513b and its control input provided via a further lead (not shown).
Board control lines 3643 are arranged on the second side, i.e. on the opposite side of the PCB than where the semiconductor switching device 3610 is mounted: a (small) plurality of vias (not shown in this cross-section) extending through the PCB connects the 20 board control lines 3643 to the semiconductor switching device 3610 via lead 1513b.
Fig. 7 and Fig. 8 schematically illustrate an interface module 360 according to again another embodiment. The interface module 360 shown in Fig. 6 differs from that shown in Fig. 4 and Fig. 5 in at least that the placement area 3630 comprises a placement area extension 3630e and the output interface area 3713 comprises an output interface area 25 extension 3713e, whereby the placement area 3630 and the output interface area 3713 extend respectively with the placement area extension 3630e and the output interface area extension 3713e from an immediate vicinity of the semiconductor switching device 3610 towards a plurality of cutouts 3650 in the PCB 3600. The plurality of cutouts 3650 extend from the first side 3601 to the second side 3602 of the PCB along respective cutouts walls 3650. The 30 towbar cables 371 are positioned with their towbar cable ends 3712 in the respective cutouts 3650 against the walls 3650. The towbar cables 371 are soldered with their towbar cable ends 3712 onto the first side 3601 of the PCB 3600 to the placement area extension 3630e of the placement area 3630 to form an electrical and thermal contact with the placement area 3630 and onto the second side 3602 of the PCB 3600 to the output interface area extension 3713e 35 of the output interface area 3713 to form an electrical and thermal contact with the output 17 interface area 3713. Hereby, the thermal resistance from each of the semiconductor switching device 3600 to the respective towbar cable 371 may be reduced, while at the same time a robust mechanical connection may be provided between the towbar cables 371 and the PCB 3600. In further embodiments, the power supply cable 330 is connected in a similar manner 5 with its supply cable end 3302 received in a similar cutout.
Fig. 8 schematically illustrates the PCB 3600 with the cutouts 3650. In Fig. 8, most components shown in Fig. 7 are not drawn in order not to obscure the figure. Fig. 8 shows that the semiconductor switching device 3600 is positioned on the placement area 3630, which extends with its placement area extension 3630e towards a respective cutout 10 3650. Also, the output interface area 3713 extends, on the opposite side of the PCB, with its output interface area extension 3713e to the respective cutout 3650. In the example shown, the cutouts 3650 are V-shaped, allowing to receive the towbar cable ends 3712 in well-defined positions. In alternative embodiments, the cutouts 3650 may be shaped alternatively, with other shapes suitable to receive the towbar cable ends 3712. The cutouts 3650 may 15 further be shaped to provide a clamping force to hold the towbar cable ends 3712. The cutouts 3650 may e.g. have been formed by drilling, cutting or sawing. The cutouts 3650 may further be provided with a copper layer on its wall 3651.
Fig. 9 illustrates a method of connecting the plurality of towbar cables 371 of the output cable harness 370 to a PCB 3600 provided with such cutouts 3650. All other 20 components on the PCB, e.g. as shown in Fig. 7, are not drawn in order not to obscure the figure. Fig. 9 shows a handling device 800, e.g. as a chuck. The handling device 800 is arranged to temporarily receive the plurality of towbar cables 371 at their insulating cladding 3722 at mutual distances corresponding to the distances between the cutouts 3650 provided in the PCB 3600. The handling device 800 can hereby be operated to place the plurality of 25 towbar cables 371 with their cable ends 3712 in the respective cutouts 3650 in the PCB 3600, allowing to solder the cable ends 3712 to the PCB 3600 in direct contact with the placement area 3630 as well as the output interface area 3713. The handling device 800 comprises a thermally conductive material, e.g. a suitable metal. The thermally conductive material is in contact with the cladding 3722 during the soldering, allowing to transfer the heat generated 30 by the soldering away from the cladding 3722 and preventing the solder to penetrate into the towbar cable 371. Such penetration could be disadvantageous, at it could e.g. reduce the flexibility of the towbar cable 371.
Fig. 10 schematically illustrates a use of an interface device 300 according to embodiments. Fig. 10 schematically shows an interface device 300 connected to a vehicle 35 lighting system 110 of a vehicle. The interface device 300 has an input cable harness 310, an 18 output cable harness 370 (which may also be referred to as a towbar cable harness 370), and an interface module 360. The interface module 360 is connected to the vehicle lighting system 110 with the input cable harness 310. The interface module 360 is connected to a towbar socket 380 with the output cable harness 370. In this embodiment, the towbar socket 5 380 is moulded onto the output cable harness 370, whereby the part of the system that is exposed to an outside environment may be made more moisture-resistant.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative 10 embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Use of the verb "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by 15 means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Claims (25)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2006706A NL2006706C2 (en) | 2011-05-03 | 2011-05-03 | Electronic interface device for connecting a trailer lighting system to a vehicle lighting system. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2006706A NL2006706C2 (en) | 2011-05-03 | 2011-05-03 | Electronic interface device for connecting a trailer lighting system to a vehicle lighting system. |
NL2006706 | 2011-05-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL2006706C2 true NL2006706C2 (en) | 2012-04-03 |
Family
ID=44534565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL2006706A NL2006706C2 (en) | 2011-05-03 | 2011-05-03 | Electronic interface device for connecting a trailer lighting system to a vehicle lighting system. |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL2006706C2 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7414619U (en) * | 1974-04-26 | 1975-11-06 | Philips Patentverwaltung | Layer connection with connection conductor |
US6058013A (en) * | 1998-07-02 | 2000-05-02 | Motorola Inc. | Molded housing with integral heatsink |
US20010026441A1 (en) * | 2000-03-29 | 2001-10-04 | Rohm Co., Ltd. | Printed wiring board having heat radiating means and method of manufacturing the same |
US20040136162A1 (en) * | 2002-11-21 | 2004-07-15 | Nobuhiro Asai | Heat dissipating device for electronic components of electronic control devices |
DE102004030443A1 (en) * | 2004-06-24 | 2006-01-19 | Robert Bosch Gmbh | Control apparatus especially a surface mounted power element has power component in a housing with both upper and lower heat dissipating surfaces |
-
2011
- 2011-05-03 NL NL2006706A patent/NL2006706C2/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7414619U (en) * | 1974-04-26 | 1975-11-06 | Philips Patentverwaltung | Layer connection with connection conductor |
US6058013A (en) * | 1998-07-02 | 2000-05-02 | Motorola Inc. | Molded housing with integral heatsink |
US20010026441A1 (en) * | 2000-03-29 | 2001-10-04 | Rohm Co., Ltd. | Printed wiring board having heat radiating means and method of manufacturing the same |
US20040136162A1 (en) * | 2002-11-21 | 2004-07-15 | Nobuhiro Asai | Heat dissipating device for electronic components of electronic control devices |
DE102004030443A1 (en) * | 2004-06-24 | 2006-01-19 | Robert Bosch Gmbh | Control apparatus especially a surface mounted power element has power component in a housing with both upper and lower heat dissipating surfaces |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7898811B2 (en) | Thermal management of LEDs on a printed circuit board and associated methods | |
US9095069B2 (en) | Direct mechanical/electrical printed circuit board interface | |
US11056629B2 (en) | Mounting an LED element on a flat carrier | |
US9033742B2 (en) | Connector and illumination device | |
CA2562357A1 (en) | Metal carrier for leds in composite lamps | |
JP2004172459A (en) | Heat dissipation structure of electronic component in electronic controller | |
US20100303424A1 (en) | Optical wiring cable | |
CN111372815B (en) | Lighting module and vehicle headlamp | |
CN102365491A (en) | Lighting system comprising at least one luminous band | |
JP2002163912A (en) | Light emitting equipment system and light emitting diode array | |
US20120090881A1 (en) | Metal core substrate | |
US20080311767A1 (en) | Surface mount electrical connector having insulated pin | |
EP2672177A1 (en) | LED lighting device and LED lighting arrangement | |
KR102053275B1 (en) | Junction block with heat dissipation structure | |
NL2006706C2 (en) | Electronic interface device for connecting a trailer lighting system to a vehicle lighting system. | |
US20090111294A1 (en) | Bus bar to printed circuit board interface for electric and hybrid electric vehicles | |
JP2007325345A (en) | Electrical connection box | |
US9532458B2 (en) | Electrical assembly within a connector housing | |
US9849823B2 (en) | Indicator unit for a system for indirect vision of a vehicle and system for indirect vision comprising an indicator unit | |
WO2011052943A2 (en) | Lighting apparatus using semiconductor light emitting device | |
CN102313225A (en) | Has the lighting apparatus that strengthens heat dissipation ability | |
CN214338203U (en) | Circuit structure and electric control device | |
CN109937159A (en) | Connecting elements in interconnection module and interconnection module | |
CN112352473B (en) | Circuit substrate | |
JP2018076013A5 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Lapsed because of non-payment of the annual fee |
Effective date: 20180601 |