EP4029131A1 - Module électronique de puissance doté d'une gaine d'étanchéité fixée par l'intermédiaire d'un agent d'adhérence, machine d'entraînement électrique et procédé de production - Google Patents

Module électronique de puissance doté d'une gaine d'étanchéité fixée par l'intermédiaire d'un agent d'adhérence, machine d'entraînement électrique et procédé de production

Info

Publication number
EP4029131A1
EP4029131A1 EP20767720.4A EP20767720A EP4029131A1 EP 4029131 A1 EP4029131 A1 EP 4029131A1 EP 20767720 A EP20767720 A EP 20767720A EP 4029131 A1 EP4029131 A1 EP 4029131A1
Authority
EP
European Patent Office
Prior art keywords
power electronics
electronics module
busbars
potting body
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20767720.4A
Other languages
German (de)
English (en)
Inventor
Andreas Ruppert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP4029131A1 publication Critical patent/EP4029131A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • 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
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1427—Housings
    • H05K7/1432—Housings specially adapted for power drive units or power converters
    • H05K7/14329—Housings specially adapted for power drive units or power converters specially adapted for the configuration of power bus bars
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections

Definitions

  • the invention relates to a power electronics module for an electric drive machine of a purely electrically or hybrid-powered motor vehicle, such as a car, truck, bus or other commercial vehicle, with several busbars such as a potting body that supports the busbars apart and electrically isolated from one another, with each busbar on a first connection area and a second connection area opposite the first connection area for further contact to the surroundings of the potting body.
  • the invention also relates to an electric drive machine with this power electronics module and a method for producing this power electronics module.
  • FIG. 9 A power electronics module 1 known in principle from the prior art is shown in FIG. 9.
  • This power electronics module 1 has several busbars 2 which are arranged in a potting body 3 and enclosed by this potting body 3.
  • the power electronics module 1 is arranged in its drive machine installed state with one part in a dry space and with another part in a wet space of a housing of the electric drive machine sealed from the dry space.
  • a circumferential device 15 is arranged on the potting body 3 in a gap area between a receiving hole in the housing and an outside of the potting body 3.
  • busbars are each provided on a longitudinal section between their two connection areas, arranged in a common recess of the composite body cast from a (first) plastic material, with a sealing jacket applied separately to the potting body, which sealing jacket has a Adhesion promoter layer adheres to the busbar.
  • an inner seal is made available within the power electronics module in a compact and easy-to-manufacture manner, which prevents a liquid transported by capillary forces from passing from a wet area into a dry area of the electric drive machine during operation.
  • the power electronics module is therefore designed to implement a more durable electric drive machine.
  • busbars are surface-activated in the longitudinal section surrounded by the adhesion promoter layer. This further increases the adhesive force between the sealing jacket / the adhesive layer and the busbar. It is also advantageous if three busbars are provided, each of which is arranged with its longitudinal section within the recess (and is furthermore coupled to the sealing jacket in the usual way via an adhesion promoter layer). This enables the power electronics module to have a compact design.
  • the recess is formed as a through hole penetrating the potting body, its production can be implemented particularly easily in conventional casting processes, preferably injection molding processes.
  • the through hole is closed by a cover at its end region which is spaced apart from the busbars. This further simplifies the manufacture of the sealing jacket.
  • sealing jacket is implemented directly with a filling that is cast into the recess (consisting of a second plastic material).
  • the invention relates to an electric drive machine for a motor vehicle, with a housing, the housing having a wet space accommodating a stator and a dry space sealed relative to the wet space, and with a power electronics module according to the invention according to at least one of the previously described embodiments, wherein the first connection areas of the busbars are arranged in the dry room and the second connection areas of the busbars, which are further connected to windings of the stator, are arranged in the wet room.
  • the invention relates to a method for producing a power electronics module for an electrical drive machine of a motor vehicle, wherein in a first step a plurality of busbars are encapsulated by a first plastic material (preferably in an injection molding process) in such a way that the busbars form one potting body after curing first plastic materials are kept as spaced apart and electrically insulated from one another and are each arranged with a longitudinal section within a recess of the potting body exposed to the environment, in a second step (after step a), ie after the potting body has completely cured, an adhesion promoter layer is applied to the longitudinal section of each busbar and, in a third step, a second plastic material is poured into the recess, so that the second plastic material, after it has hardened, acts as a sealing jacket over the adhesive Layer adheres to the longitudinal portion of each bus bar.
  • a first plastic material preferably in an injection molding process
  • an oil-tightness of a high-voltage component is guaranteed according to the invention.
  • a small chamber is cast into the plastic housing (potting body), through which chamber the copper rails (busbars) between the electric motor (stator) and the electronics run through.
  • the copper bars are treated with an adhesion promoter (/ primer) to increase their adhesion.
  • the chamber is then filled with a cast component sealing jacket.
  • FIG. 1 shows a side view of a power electronics module according to the invention according to a preferred exemplary embodiment, in which, in addition to an outer seal accommodated on the outside of a potting body, a recess can be seen within which a sealing casing surrounding a plurality of busbars is shown transparently,
  • FIG. 2 is a perspective detailed view of the sealing casing (shown transparently) receiving recess from the outside,
  • FIG. 3 shows a perspective illustration of the entire power electronics module according to FIG. 1,
  • FIGS. 1 to 3 shows a perspective illustration of a partially sectioned electrical drive machine with the power electronics module according to the invention according to FIGS. 1 to 3, whereby in addition to a wet room, a dry room which is sealed off relative to this wet room can be clearly seen,
  • FIG. 5 shows a view from below of the power electronics module according to FIG. 1, wherein a cover closing off the recess towards an underside can be seen,
  • FIG. 6 shows a perspective detailed view of the underside already shown in FIG. 5 with an exploded view of the cover and the sealing casing of the rest of the potting body
  • FIG. 7 shows a partially transparent illustration of the power electronics module shown from the bottom according to FIG. 5,
  • FIG. 8 shows a partially transparent illustration of the power electronics module shown from the top according to FIG. 1, as well as
  • FIG. 9 is a perspective view of a power electronics module known from the prior art.
  • a power electronics module 1 according to the invention is shown in isolation with FIGS. 1, 3, 5, 7 and 8 can be recognized.
  • the power electronics module 1 as can also be seen in FIG. 4, is used in its preferred area of application in an electric drive machine 10 of a motor vehicle.
  • the electric drive machine 10 is implemented in the usual way as an electric motor having a stator 17 and a rotor, not shown here for the sake of clarity.
  • the electric drive machine 10 is preferably used to drive a hybrid motor vehicle, more preferably to drive a purely electrically driven motor vehicle.
  • the electric drive machine 10 is thus preferably integrated in a hybrid module (drive module with clutches) or an e-axis (electric drive axle unit).
  • the electric drive machine 10 is at least its stator 17 implemented directly / directly liquid-cooled.
  • the electric drive machine 10 accordingly has a wet space 18 that accommodates the stator 17 and a drying space 19 which is sealed off relative to this wet space 18.
  • Wet space 18 and dry space 19 form sub-spaces within a common housing 16 of the electric drive machine 10.
  • further electronic components are then typically arranged that are not surrounded by a cooling liquid flowing through the wet space 18 during operation.
  • the power electronics module 1 according to the invention is now designed as a connecting element between the windings 21 of the stator 17 and the electronic components not shown closer for the sake of clarity.
  • the further basic design of the power electronics module 1 can be seen particularly well in FIG. 3.
  • the power electronics module 1 has a potting body 3, which can be seen from the outside, in the form of a plastic housing.
  • the potting body 3 is molded around several, here three, busbars 2a, 2b, 2c and then cured so that it receives the busbars 2a, 2b, 2c at a distance from one another and electrically decoupled from one another.
  • Each busbar 2a, 2b, 2c is exposed on the part of a first connection area 4 in the drying room 19 to the surroundings of the power electronics module 1.
  • a second connection area 5 of the respective busbar 2a, 2b, 2c opposite the respective first connection area 4 is exposed to the area of the potting body 3 arranged in the wet room 18 and connected to the windings 21 of the Stator 17 further connected. Between the connection areas 4, 5, each busbar 2a, 2b, 2c is completely encased in plastic material.
  • a seal 15 is arranged between the two connection areas 4, 5 on an outer side 14 of the casting body 3 in an annular groove. This acting as the outer seal of the power electronics module 1 seal 15 serves immediacy for sealing a gap 22 formed between the housing 16 of the electrical drive machine 10 and the potting body 3 (FIG. 4). As can be seen, this seal 15 is designed with an essentially circular cross section in the sense of an O-ring. In addition, the seal 15 has in a circumferential area an anti-rotation nose 20 which is positively received in the potting body 3. This results in a reliable sealing of the dry space 19 relative to the wet space 18 by the power electronics module 1.
  • a sealing jacket 9 is implemented in a recess 6 of the Vergusskör pers 3 in accordance with the invention.
  • the busbars 2a, 2b, 2c are surrounded by this sealing jacket 9 in a restricted longitudinal section 8 between each of the first and second connection areas 4, 5.
  • the sealing jacket 9 is realized as a (second) plastic material that is produced / cast separately from the (first) plastic material of the potting body 3.
  • a recess 6 in the form of a through hole 11 is initially kept free in a first step during casting of the potting body 3, through which recess 6 the busbars 2a, 2b, 2c extend with their longitudinal section 8.
  • the sealing jacket 9 is fastened to the longitudinal section 8 via an adhesion promoter layer 7 on the outer surface of the respective busbar 2a, 2b, 2c.
  • an adhesion promoter layer 7 is thus applied to the respective longitudinal section 8 of the busbars 2a, 2b, 2c.
  • the surface of the longitudinal section 8 was preferably surface-activated.
  • the second plastic material, which forms the sealing jacket 9 in the cured state is filled into the recess 6 until the longitudinal sections 8 are completely surrounded by the sealing jacket 9.
  • a cover 13 is used on an underside of the potting body 3 to close the recess 6.
  • the cover 13 is positioned on an end region 12 of the recess 6 spaced from the busbars 2a, 2b, 2c.
  • the up device casing 9 is implemented as an inner seal of the power electronics module 1.
  • the individual busbars 2a, 2b, 2c extend between their connection areas 4, 5 continuously and completely isolated from one another within the potting body 3. While each first connection area 4 is shaped as a plug receptacle, every second connection area 5 is provided with two pins.
  • the first busbar 2a runs essentially parallel to the second busbar 2b; the third busbar 2c runs essentially parallel to the first busbar 2a and the third busbar 2c.
  • a high-voltage terminal (power electronics module 1) is used to contact two interfaces.
  • One interface is to the power electronics, the other to the electric machine 10.
  • the area of the power electronics is also called the dry room and the area of the electric machine 10 is called the wet room, since this is actively cooled with a corresponding oil. Both rooms are sealed from the outside via a separate seal 15.
  • the present system is a high-voltage terminal 1, which consists of copper bars 2a, 2b, 2c, which are overmolded with a corresponding plastic.
  • the inventive solution consists in using an additional potting compound (Dichtungsum casing 9) in order to generate an additional barrier for the oil creeping along.
  • the busbars 2a, 2b, 2c are treated with a so-called primer (adhesion promoter layer 7) in order to increase the adhesion of the potting compound 9 to the copper-plastic connection.
  • the potting agent is filled in and cured under temperature. The now created 3-part The compound made of potting plastic-copper is much more oil-tight than the original system.
  • FIG. 3 it can be clearly seen that an additional potting chamber 6 has now been introduced behind the seal 15 in the drying space 19. This potting chamber 6 is used as described above to generate a barrier for the oil creeping along.
  • the FIV terminal 1 is shown from above.
  • the three busbars 2a, 2b, 2c can be seen.
  • the base is provided with a cover 13. This is required so that the potting material does not run off during the potting process. Plastic and copper expand differently when exposed to temperature.
  • the potting itself also has a different coefficient of expansion.
  • the primer 7 an adhesive
  • the potting compound 9 can form an adhesive bond with the copper 2a, 2b, 2c and the plastic 3. In this way, sufficient tightness is generated within the assembly.
  • the busbars 2a, 2b, 2c are pre-bent accordingly and inserted into an injection molding tool and encapsulated with a suitable material.
  • an area (potting area) is correspondingly omitted in order to produce an empty chamber 6.
  • This empty chamber 6 is closed on one side with the separate cover 13. This leaves an opening that can be used for the filling process.
  • FIGS. 6 to 8 illustrate further representations, such as a transparent view to make the course of the busbars 2a, 2b, 2c more visible, as well as an exploded view. Reference list

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un module électronique de puissance (1) pour une machine d'entraînement électrique (10) d'un véhicule automobile (2a, 2b, 2c), comprenant de multiples barres omnibus (2a, 2b, 2c) et un élément d'enrobage (3) supportant les barres omnibus (2a, 2b, 2c) de telle sorte qu'elles sont espacées et isolées électriquement l'une de l'autre, chaque barre omnibus (2a, 2b, 2c) étant exposée dans une première zone de connexion (4) et une seconde zone de connexion (5), opposée à la première zone de connexion (4), pour un contact supplémentaire avec l'environnement de l'élément d'enrobage (3), les barres omnibus (2a, 2b, 2c) étant pourvues d'une gaine d'étanchéité (9), appliquée séparément à l'élément d'enrobage (3) sur une section longitudinale (8) entre les deux zones de connexion (4, 5) disposées dans un évidement commun (6) dans l'élément d'enrobage (3) réalisé dans un matériau plastique, ladite gaine d'étanchéité (9) étant collée à la barre omnibus (2a, 2b, 2c) par l'intermédiaire d'une couche d'agent d'adhérence (7). L'invention concerne également une machine d'entraînement électrique (10) comprenant ledit module électronique de puissance (1), ainsi qu'un procédé d'un module électronique de puissance (1).
EP20767720.4A 2019-09-10 2020-08-25 Module électronique de puissance doté d'une gaine d'étanchéité fixée par l'intermédiaire d'un agent d'adhérence, machine d'entraînement électrique et procédé de production Pending EP4029131A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019124229.0A DE102019124229A1 (de) 2019-09-10 2019-09-10 Leistungselektronikmodul mit über einen Haftvermittler angebrachten Dichtungsummantelung; elektrische Antriebsmaschine; sowie Herstellverfahren
PCT/DE2020/100744 WO2021047722A1 (fr) 2019-09-10 2020-08-25 Module électronique de puissance doté d'une gaine d'étanchéité fixée par l'intermédiaire d'un agent d'adhérence, machine d'entraînement électrique et procédé de production

Publications (1)

Publication Number Publication Date
EP4029131A1 true EP4029131A1 (fr) 2022-07-20

Family

ID=72380871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20767720.4A Pending EP4029131A1 (fr) 2019-09-10 2020-08-25 Module électronique de puissance doté d'une gaine d'étanchéité fixée par l'intermédiaire d'un agent d'adhérence, machine d'entraînement électrique et procédé de production

Country Status (5)

Country Link
US (1) US20220329126A1 (fr)
EP (1) EP4029131A1 (fr)
CN (1) CN114287100A (fr)
DE (1) DE102019124229A1 (fr)
WO (1) WO2021047722A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022207967A1 (de) * 2022-08-02 2024-02-08 Robert Bosch Gesellschaft mit beschränkter Haftung Hochvoltsschnittstelle und Verfahren zum Herstellen einer Hochvoltschnittstelle

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061185B4 (de) * 2008-09-23 2012-09-13 Leoni Bordnetz-Systeme Gmbh Kabeldurchführungselement sowie Verfahren zur Ausbildung eines Kabeldurchführungselements
EP2498383B1 (fr) * 2009-11-06 2020-02-12 Yazaki Corporation Bloc terminal inverseur pour carter de moteur
CH706557A2 (de) * 2012-05-24 2013-11-29 Schwanden Kunststoff Elektrische Kontaktleiterdurchführung durch eine Behälterwand.
DE102015213439A1 (de) * 2015-07-17 2017-01-19 Zf Friedrichshafen Ag Leistungsanschluss für ein elektrisches Gerät, insbesondere für eine elektrische Maschine zum Antreiben eines Kraftfahrzeuges
DE102016207547A1 (de) * 2016-05-02 2017-11-02 Volkswagen Aktiengesellschaft Verschaltungsanordnung zur elektrischen Verschaltung mehrerer Statordrähte mit einer Abdichtung
WO2018025990A1 (fr) * 2016-08-05 2018-02-08 日本電産株式会社 Moteur
DE102016223167A1 (de) * 2016-11-23 2018-05-24 Robert Bosch Gmbh Trägerbauteil, insbesondere eines Automotive-Steuergeräts
US10717401B2 (en) * 2017-04-21 2020-07-21 Ford Global Technologies, Llc Terminal block assembly for electrified vehicles
DE102017215729A1 (de) * 2017-09-07 2019-03-07 Zf Friedrichshafen Ag Verbindungsvorrichtung und Verfahren zum elektrischen Verbinden eines Elektromotors mit einer elektronischen Schalteinheit, elektronische Schalteinheit, Verbindungseinheit und Vorrichtungssystem mit zumindest einer Verbindungsvorrichtung
DE102017223543A1 (de) * 2017-12-21 2019-06-27 Volkswagen Aktiengesellschaft Elektrisches Verbindungselement

Also Published As

Publication number Publication date
DE102019124229A1 (de) 2021-03-11
CN114287100A (zh) 2022-04-05
WO2021047722A1 (fr) 2021-03-18
US20220329126A1 (en) 2022-10-13

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