Source: https://patents.google.com/patent/EP1842407B1/en
Timestamp: 2020-05-27 10:35:12
Document Index: 434729401

Matched Legal Cases: ['art 3', 'art 6', 'art 6', 'art 7', 'art 7', 'art 2', 'art 2', 'art 7', 'art 2', 'art 6', 'art 14', 'art. 3', 'art 2', 'art 2', 'art 6', 'art 14', 'art 14', 'art 14', 'art 6', 'art 14', 'art 14', 'art 2', 'art 6', 'art 14', 'art 7', 'art 9', 'art 6', 'art 7', 'arts 6', 'art 2', 'arts 3', 'art 2', 'art 2', 'art 2', 'art 3', 'art 2', 'art 6', 'art 2', 'art 6', 'art 2', 'art 6', 'art 7', 'art 7', 'art 14', 'art 2', 'art 2', 'art 2', 'art 7', 'art 2', 'art 7', 'art 7', 'art 2', 'art 6', 'art 7', 'art 6', 'art 6', 'art 14']

EP1842407B1 - Control module - Google Patents
EP1842407B1
EP1842407B1 EP20060700718 EP06700718A EP1842407B1 EP 1842407 B1 EP1842407 B1 EP 1842407B1 EP 20060700718 EP20060700718 EP 20060700718 EP 06700718 A EP06700718 A EP 06700718A EP 1842407 B1 EP1842407 B1 EP 1842407B1
EP1842407A1 (en
The invention relates to a control module, in particular for a control module for a motor vehicle transmission having the features of the preamble of independent claim 1.
A control module with the features of the preamble of claim 1 is for example from the DE 199 07 949 A1 known. Such control modules are adapted to be fixed to a motor vehicle component such as the transmission or the engine, and have different, the motor vehicle component associated components on control modules for automatic transmission, for example, a hybrid control unit with an electronic circuit part, sensors and at least one connector for connection to the vehicle wiring harness on and are partially arranged on the gear so that they are exposed to the transmission fluid and the prevailing high temperatures of up to 150 ° C. To protect the sensitive electronic circuit part, an oil-tight encapsulation of the same is required. The known control module has for this purpose a bottom plate as the first housing part, which is laterally continued by a plastic carrier. A flexible conductor foil is laminated to the plastic carrier and the bottom plate. A cover with an inserted seal as a second housing part is placed on the conductor foil. The conductor foil is electrically connected in the interior of the housing with an electronic circuit part applied to the base plate via bonding wires. Since the flexible conductor foil is glued to the bottom plate for sealing, the relatively large composite part of bottom plate and plastic carrier in the manufacture of the bonding wire connections, the alignment of the circuit and other manufacturing steps must go through the entire electronics manufacturing.
The control module according to the invention with the characterizing features of claim 1 requires very little installation effort and is inexpensive to produce. By a stack-shaped structure in which the carrier is disposed with a first side on a provided with the circuit part inside of the first housing part, the circuit part is arranged in a recess of the carrier, the flexible conductor foil on the side facing away from the first housing part second side of the Carrier is arranged and the second housing part is placed on the flexible conductor foil, eliminating the need to laminate the flexible conductor foil on the provided with the circuit part first housing part and it is achieved in a particularly advantageous manner that the control module consists essentially of an assembly for the Connection functions and an assembly for the electronics functions and a cover part can be assembled, the two modules can be made separately and pre-tested in a particularly advantageous manner and are then simply stacked. The electrical interface between the two modules can be designed so that a simple and robust electrical connection of the two modules is possible.
Since the module for the electronics functions can be produced without the flexible conductor foil, this is less expensive to produce, since the assembly of the electronic circuit part and the contacting of the electronic components with the conductor tracks of the circuit part can be done by means of bonding wires in single substrate production. For this purpose, for example, an LTCC substrate (low-temperature cofired ceramic) is made in use and divided into individual substrates, which are then individually glued to each one the first housing part forming, small and flat metallic base plate, preferably an aluminum plate. As incorrectly identified LTCC substrates are sorted out immediately after separation. Each consisting of a base plate and an LTCC substrate individual modules are then equipped with electronic components. The electrical contacting of the components with the substrate can be effected by means of gold bonding wires or in another suitable manner. Due to the small size of the base plate, the processes of loading and bonding on standard machines can be carried out. Subsequently, the module can undergo various functional tests, some of which at very high and low temperatures of 120 ° C to -20 ° C are performed. Since the assembly has a very small mass, heating and cooling can be carried out quickly. The electronic module assembly of the control module can be largely manufactured as a standard component and be replaced by an assembly with a different standard but the same geometric dimensions regardless of the provided for the connection functions module.
The assembly for the connection functions includes the carrier and the applied flexible printed circuit foil and sensors, connectors and optionally an additional cover. The functionality of this module can be checked independently of the module for the electronics functions. Advantageously, individual electrical components, such as capacitors can be introduced with wire connections within a recess of the carrier and contacted with the conductor foil, so that these components are arranged in the finished control module within the housing interior and protected from contamination and thermal cycling. However, electronic components can also be applied directly to the conductor tracks of the flexible conductor foil, for example by soldering, conductive bonding or bonding. Since the assembly is done during the assembly assembly assembly, no consideration needs to be given to the fine structures of the LTCC substrate, for example, flux may not contaminate the LTCC substrate. In the finished control module, however, the components are housed protected in the sealed housing interior.
The two assemblies can be simply superimposed after their preparation. The electrical connection preferably takes place via bonding wires which connect the LTCC substrate to the flexible conductor foil. After a gel filling, in which gel is applied in the recess of the carrier, in which the LTCC substrate is arranged, the gel can be cured. Subsequently, the second housing part to be regarded as a cover is placed on the conductor foil. A separate opening for filling in the gel, which would have to be closed by a separate seal, can advantageously be dispensed with. The stack thus formed is finally held together by means of fastening elements.
3 shows a cross section through a first exemplary embodiment of the control module according to the invention,
the preparation of the embodiment Fig. 1 .
the production of a second embodiment,
a partial section of a cross section through a fourth embodiment,
a partial section of a cross section through a fifth embodiment,
a cross section through a sixth embodiment,
a cross section through a seventh embodiment.
Fig. 1 shows a cross section through a first embodiment of the control module according to the invention. The control module 1 comprises a carrier 2 made of metal or plastic which can be fixed, for example, to the transmission of a motor vehicle and to which various components, such as sensors 4, a plug part 3 and optionally not shown hydraulic valves for controlling Stellgfiedern the transmission and a transmission control unit 5 are fixed , The control unit 5 has a first housing part 6, which is preferably formed as a metallic base plate made of, for example, aluminum. On the inside 6a of the first housing part 6, an electronic circuit part 7, for example, an LTCC substrate (low temperature cofired ceramic), which is equipped with electronic components 8, glued. The devices 8 may be connected by gold bonding wires to the tracks of the LTCC substrate. The circuit part 7 is connected to a flexible conductor foil 9 via, for example, formed as aluminum bonding wires 10 contact elements. The flexible conductor foil 9 can consist of one of the customary carrier foils of polyimide, which carry conductor tracks made of copper and are structured in the photo process and formed by etching and are insulated from the outside by means of a protective coating or a further foil.
As in Fig. 1 can still be seen, the large-area flexible conductor foil 9 is applied to a support 2, 2a, which is formed in two parts in the first embodiment and a rectangular frame part 2a made of plastic, for example, and a surrounding the frame part 2a and this in a distance weiteretzendes Support member 2 made of metal or plastic. The carrier and the conductor foil 9 have a rectangular recess 31 for receiving the circuit part 7. The flexible conductor foil 9 rests against the side of the frame part 2 a facing away from the first housing part 6 and can be fastened there, for example, by means of an adhesive. In addition, the flexible conductor foil 9 rests on the side facing away from the first housing part side of the support member 2 and is fixed there outside of the second housing part 14 by a cover 18 which presses the conductor foil to the support member The cover 18 can simultaneously also for fixing the connector part. 3 and the sensors 4 are used. Between the frame part 2a and the support part 2, a circumferential gap 32 is provided in which a circumferential first sealing element 12 (for example, an elastic sealing ring) is arranged, which rests sealingly on the one hand on the inner side 6a of the first housing part 6 and on the other hand on the flexible conductor foil 9 ,
On the flexible conductor foil 9 a provided as a cover part second housing part 14 is placed, which may be, for example, a plastic injection molded part or a metallic cover part. In a groove of the second housing part 14, a circumferential second sealing element 13 is arranged, which rests sealingly on the one hand on the housing part 14 and on the other hand on the conductor foil 9. The second sealing element 14 has a slightly smaller diameter than the first sealing element 13, so that the two sealing elements are not superimposed, but are arranged offset from one another.
The stack formed from the first housing part 6, the carrier 2, the large-area conductor foil 9 and the second housing part 14 is provided at the edges of the first and second housing part with a plurality of through recesses into the fasteners 15 in the form of rivets, screws, locking means or similar means are used. By the fasteners 15 of the stack is compressed, so that the second housing part 14, the elastic second sealing element 13 presses against the top of the conductor foil 9 which is supported at this point on the frame part 2 a, and the first housing part 6, the elastic first sealing element 12 against the Bottom of the conductor foil 9 presses, which is supported at this point on a circumferential collar 33 of the second housing part 14. In this way, an oil-tight housing interior 16 is formed by means of only second sealing elements, in which the circuit part 7 and the bonding wires 10 are arranged protected. The components 8 of the electronic circuit part 9 are introduced into the recess 31 by means of a Covering material 17, for example a gel, passivated in a known manner.
Fig. 2 shows how the first embodiment of the control module according to the invention can be produced by means of testable modular assemblies. A first module 19 for the electronic functions comprises the first housing part 6 and the electronic circuit part 7 glued thereon. This module is produced by isolating an LTCC large-size substrate, which has been produced in terms of usefulness, into individual substrates, which are adhesively bonded to the housing parts 6. Subsequently, components 8 are mounted on the LTCC substrates and contacted by bonding wires with the conductor tracks of the substrate. These processes can be carried out on standard machines due to the relatively small spatial extent of the first housing part. Finally, the functionality of the finished assembly 19 is tested. The second assembly 20 for the connection functions comprises the support part 2 made of plastic or metal, to which plug parts 3 and sensors 4 are fixed, and a rectangular frame part 2a inserted into a rectangular recess of the support part 2, the first sealing element 12 and the large-area flexible conductor foil 9 In the production, the conductor foil 9 is first glued in its inner region to the peripheral frame part 2a. Subsequently, the conductor foil is placed with its outer peripheral portion on the support member 2 and then the cover 18 is placed on the conductor foil 9. Finally, the plug part 3 and the sensors 4 are electrically connected to the conductive foil.
The final assembly of the control module is carried out by stacking the modules 19 and 20, wherein the fasteners 15 serve as centering and joining means. For this purpose, as in Fig. 2 initially shown the fasteners are positioned on a workpiece carrier. The first assembly 19 is then first placed on this, so that the fastening elements 15 penetrate the recesses 34 of the base plate. Then, the second assembly 10 is placed, so that the frame part 2 a and the first sealing element 12 is positioned on the inner side 6 a of the first housing part 6. The frame part 2a is fixed in the housing part 6 imprinted pin or bonding between the frame part 2a and the housing part 6. The fasteners 15 engage through recesses 35 in the support member 2 and recesses 36 in the conductor foil 9. Finally, the two assemblies are electrically connected to each other by means of the bonding wires 10 between circuit part 7 and conductor foil 9 and a circuit part 7 covering gel introduced into the recess 31 this can be cured by applying the gel. Finally, the second housing part 14 is placed with the second sealing element 13 on the conductor foil 9, wherein the fastening elements engage through recesses 37 of the second housing part, and compressed the stack with the force F, so that the housing interior 16 is sealed oil-tight
Fig. 3 shows how a second embodiment of the control module according to the invention is produced by means of pre-testable assemblies. In this embodiment, no cover 18 is provided. Instead, the flexible Leiterfok 9 is glued not only on the frame part 2a but by means of an adhesive 21 on the support member 2. This bond can over the entire support surface of the large-area flexible conductor foil 9 on the support or just as in Fig. 3 shown in sub-areas.
If the support part 2 is manufactured as an injection-molded part made of plastic, the flexible conductor foil 9 can also be injected into the support part 2 in a third exemplary embodiment.
Fig. 4 shows a partial section of a cross section through a fourth embodiment of the invention. In this embodiment, individual electronic components 22 are outsourced from the formwork part 7 and disposed within the frame part 2 a in the housing interior 16. This outsourcing can be advantageous in order to be able to reduce the shade part 7. In particular, quite large components can therefore be arranged elsewhere except for the circuit part 7. Thus, for example, a wire element with an embedded in the frame part electrical conductor 23 in the form of a stamped lattice part, for example, by fork welding 24 are electrically contacted. The electrical contacting of the conductor 23 with conductor tracks of the conductor foil 9 takes place advantageously by means of bonding wires 25 which can be produced in the same connection process and with the same bonding means as the bonding wires 10 between the flexible conductor foil and the circuit carrier 7. The arrangement of the components 22 in a recess of the frame part 2 a, which is completed by the first housing part 6, additionally offers the advantage that the component 22 is well chambered on all sides and mechanically secured in its position, resulting in a high degree of robustness in vibration and vibration loads causes.
A fifth embodiment is in Fig. 5 Here, a single electrical device 26 is mounted within the oil-tight housing interior 16 directly on pads of the flexible conductor foil 9 and electrically connected thereto. This may be, for example, an SMD component (surface mounted device). We in Fig. 5 illustrated, the device 26 is electrically and mechanically connected to the conductor foil on the free side of the flexible conductor foil 9 by means of a contact adhesive 27.
Fig. 6 shows a sixth embodiment of the control module 1, in which the carrier 2 is integrally formed and the sealing of the control unit 5 is not via sealing elements, but by means of a sealing adhesive, for example, an epoxy adhesive or an acrylic adhesive takes place. Herzu a portion surrounding the circuit part 7 of the support 2 is glued to the underside on the circumferential adhesive layer 28 on the inside 6a of the first housing part 6 sealed. The flexible conductor foil 9 is glued tightly to the side facing away from the first housing part 6 side of the support 2 via the circumferential adhesive layer 30. On the side facing away from the carrier 2 side of the flexible conductor foil 9, the second housing part 14 is glued tightly over a third circumferential adhesive layer 29 on the flexible conductor foil 9. In this exemplary embodiment, therefore, the first and second sealing elements of the first exemplary embodiment are replaced by sealing adhesive and the gluing between the conductor foil and the carrier in the first exemplary embodiment is carried out by means of a sealing adhesive. It is particularly advantageous in this embodiment that the carrier 2 is guided as a quasi-third housing part in one piece directly into the control unit 5 and as a rigid assembly facilitating assembly for the connection functions is obtained. The insertion of the sealing elements is eliminated.
Fig. 7 shows a seventh embodiment of the ereindung, In this embodiment, the carrier 2 as a composite part in the region 2b of the adhesive layers 28, 29 and the fasteners 15 is made partially of metal, preferably aluminum. The remaining part of the carrier 2 is preferably formed as Kunststonspritzteil. Here there is the advantage that in the area of the adhesive bonds similar materials are bonded with the same coefficient of expansion.
It is understood that the embodiments shown can also be combined with each other and are encompassed by the invention, for example, embodiments in which only one of the sealing elements Fig. 1 is replaced by a sealing adhesive, or one of the sealing bonds in Fig. 6 and Fig. 7 is replaced by a sealing element. Of course, combinations of the embodiments are also made Fig. 4 and or Fig. 5 with the embodiments of Fig. 6 and 7 possible.
flexible conductor foil
Gabelschweißung
Control module, in particular for a motor vehicle transmission, comprising a first housing part (6) on which an electronic circuit part (7) is arranged, a second housing part (14) and comprising a carrier (2) composed of metal or plastic, which can be fixed to the motor vehicle transmission and on which is arranged a flexible conductor film (9) electrically connected, in a housing interior (16) situated between the first housing part and the second housing part, to the circuit part and electrically connected, outside the housing interior, to electrical components (4, 3) fixed to the carrier (2), characterized by a stacked construction in which
- the carrier (2, 2a, 2b) is arranged in a manner bearing with a first side on an inner side (6a) of the first housing part (6), said inner side being provided with the circuit part,
- the circuit part (7) is arranged in a cutout (31) of the carrier (2, 2a, 2b) and is contact-connected to the flexible conductor film (9) preferably by means of bonding wire connections (10),
- the flexible conductor film (9) is arranged on the second side of the carrier (2, 2a, 2b), said second side being remote from the first housing part (6), and
- the second housing part (14) is placed onto the flexible conductor film (9).
Control module according to Claim 1, characterized in that the carrier (2, 2a) is embodied in two parts, comprising a frame part (2a) surrounding the circuit part, and a supporting part (2) surrounding the frame part, wherein the frame part (2a) is spaced apart from the supporting part (2) by means of an interspace (32), in which interspace is arranged a first sealing element (12), which bears in sealing fashion against the inner side (6a) of the first housing part (6), on the one hand, and against the flexible conductor film (9), on the other hand. (Figure 1, Figure 4, Figure 5)
Control module according to Claim 1, characterized in that a sealing adhesive (28) is arranged between the carrier (2, 2b) and the inner side (6a) of the first housing part (6). (Figure 6, Figure 7)
Control module according to Claim 1, 2 or 3, characterized in that a second sealing element (13) is provided, which bears in sealing fashion against the flexible conductor film (9), on the one hand, and against the second housing part (14), on the other hand. (Figure 1, Figure 4, Figure 5)
Control module according to Claim 1, 2 or 3, characterized in that a sealing adhesive (29) is arranged between the second housing part (14) and the conductor film (9). (Figure 6, Figure 7)
Control module according to Claim 1, characterized in that a cover (18) is placed onto a region of the flexible conductor film (9) outside the region covered by the second housing part (14), said cover being fastened to the carrier (2, 2a). (Figure 1)
Control module according to Claim 1, characterized in that the carrier (2, 2b) is embodied as a composite part composed of a frame part (2b) surrounding the circuit part (7) and a supporting part (2) adjacent to the frame part outside the housing interior (16). (Figure 7)
Control module according to any of the preceding claims, characterized in that the stack formed from first housing part (6), carrier (2, 2a, 2b), flexible conductor film (9) and second housing part (14) is held together by means of at least one fastening element (15).
Control module according to Claim 8, characterized in that the stack formed from first housing part (6), carrier (2, 2a, 2b), flexible conductor film (9) and second housing part (14) has at least one cutout into which at least one fastening element (15) that holds the stack together is introduced.
Control module according to any of the preceding claims, characterized in that, between the first housing part (6) and the second housing part (14), at least one electrical component (22) is arranged in a cutout of the carrier (2, 2a, 2b) and is contact-connected to the flexible conductor film (9) by means of electrical connecting elements (23, 25). (Figure 4)
Control module according to any of the preceding claims, characterized in that, in the housing interior (16) between the first housing part (6) and the second housing part (14), at least one electrical component (26) is applied to the conductor film (9) and electrically contact-connected thereto. (Figure 5)
Method for producing a control module according to any of Claims 1 to 11, characterized in that the first housing part (6) with the circuit part (7) applied thereto is produced as a first assembly (19) and, independently thereof, the carrier (2, 2a) with the electrical components (3, 4) arranged thereon and the flexible conductor film (9) arranged thereon and, if appropriate, with the cover (18) is produced as a second assembly (20), and in that the second assembly (20) is placed onto the first assembly (19) and the electrical circuit part (7) is subsequently contact-connected to the flexible conductor film (9) preferably by means of bonding wire connections (10). (Figure 2, Figure 3).
Method according to Claim 12, characterized in that, after the mounting of the two assemblies (19, 20) and, if appropriate, after the introduction of a covering material (17) over the circuit part (7), the second housing part (14) is applied to the flexible conductor film (9) and the first housing part, the carrier, the flexible conductor film and the second housing part are fixed to one another by means of at least one fastening element (15).
EP1842407A1 EP1842407A1 (en) 2007-10-10
EP1842407B1 true EP1842407B1 (en) 2011-04-06
US8248800B2 (en) * 2007-05-28 2012-08-21 Aisin Aw Co., Ltd. Automatic transmission control unit cooling apparatus