WO2022101309A1 - Unité électronique pour un groupe auxiliaire d'un véhicule à moteur - Google Patents

Unité électronique pour un groupe auxiliaire d'un véhicule à moteur Download PDF

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Publication number
WO2022101309A1
WO2022101309A1 PCT/EP2021/081314 EP2021081314W WO2022101309A1 WO 2022101309 A1 WO2022101309 A1 WO 2022101309A1 EP 2021081314 W EP2021081314 W EP 2021081314W WO 2022101309 A1 WO2022101309 A1 WO 2022101309A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
cap
printed circuit
electronics
unit
Prior art date
Application number
PCT/EP2021/081314
Other languages
German (de)
English (en)
Inventor
Jan Kaiser
Matthias Markert
Markus Rauch
Dominik ANDERSON
Holger Schmitt
Marco Stock
Original Assignee
Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg
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 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg filed Critical Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg
Priority to CN202180076713.4A priority Critical patent/CN116548074A/zh
Publication of WO2022101309A1 publication Critical patent/WO2022101309A1/fr

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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
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
    • H05K5/0047—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
    • H05K5/0056—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB characterized by features for protecting electronic components against vibration and moisture, e.g. potting, holders for relatively large capacitors
    • 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
    • H05K7/02—Arrangements of circuit components or wiring on supporting structure
    • H05K7/12—Resilient or clamping means for holding component to structure
    • 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
    • H05K7/14322—Housings specially adapted for power drive units or power converters wherein the control and power circuits of a power converter are arranged within the same casing

Definitions

  • the invention relates to an electronic unit for an auxiliary unit of a motor vehicle.
  • the invention also relates to an auxiliary unit with such an electronic unit.
  • the ancillary unit is in particular an electrical cold medium drive, for example a refrigerant compressor.
  • Air conditioning systems are regularly installed in motor vehicles, which air-condition the vehicle interior with the aid of a system forming a refrigerant circuit.
  • Such systems basically have a circuit in which a refrigerant is guided.
  • the refrigerant for example R-134a (1,1,1,2-tetrafluoroethane) or R-744 (carbon dioxide), is heated in an evaporator and compressed by means of a (refrigerant) compressor, the refrigerant then being absorbed by a heat exchanger gives off heat again before it is fed back to the evaporator via a throttle.
  • a scroll compressor (scroll machine) is used as a compressor for the refrigerant.
  • a scroll compressor typically has two scroll parts that can be moved relative to one another and that work in the manner of a displacement pump during operation.
  • the two scroll parts are typically designed as a nested (helical) pair of spirals or scrolls. In other words, one of the spirals is at least partially engaged with the other spiral.
  • the first (scroll) spiral is fixed in relation to a compressor housing (stationary scroll, stator scroll, English: fixed scroll), while the second (scroll) spiral (movable scroll, rotor scroll, English: movable / orbiting scroll ) is driven in orbit by an electric motor within the first spiral.
  • a brushless electric motor is provided for the electrical or electromotive drive of the second (scroll) spiral.
  • This usually has a stator provided with a multi-phase field or stator winding on, which is arranged coaxially to a rotor with one or more permanent magnets.
  • the alternating current provided for feeding the stator winding is usually generated by a converter (inverter).
  • a converter inverter
  • this converter is accommodated together with an assigned control unit in an electronics housing which is integrated as an electronics compartment in a motor or drive housing.
  • a circuit board is provided in the electronics housing, on or on which electrical and/or electronic components are mounted.
  • a vibration can be excited which in particular causes comparatively large electrical or electronic components, i.e. components which protrude more than 10 mm or more than 12 mm from the printed circuit board, and their connection point to the printed circuit board strain or even damage it.
  • the invention is based on the object of specifying a particularly suitable electronic unit for an auxiliary unit of a motor vehicle.
  • a vibration load on its electronic components should be reduced.
  • an electronic unit with such an auxiliary unit is to be specified.
  • the object is achieved with the features of claim 1 and with regard to the auxiliary unit with the features of claim 10.
  • Advantageous refinements and developments are the subject of the respective dependent claims.
  • the advantages and configurations listed with regard to the electronics unit can also be transferred to the auxiliary unit and vice versa.
  • the electronics unit has a cup-shaped electronics housing.
  • the electronics housing thus includes a (housing) base on which in particular vertically, a housing wall protrudes.
  • the pot-like electronics housing is sealed fluid-tight with a (housing) cover.
  • a printed circuit board is accommodated in the electronics housing and is arranged parallel to the bottom of the electronics housing.
  • At least one electrical or electronic component is arranged on its side facing the bottom of the electronics housing, which is provided and set up for through-hole mounting, sometimes also referred to as plug-in mounting.
  • the electrical or electronic component for through-hole mounting is also referred to below as a THD element (English: “through hole device”).
  • Such a THD element has at least one wire connection, which is inserted through a corresponding contact hole in the printed circuit board during assembly and then electrically connected to a conductor track on the printed circuit board by a soldering process.
  • the component is electrically connected to the printed circuit board.
  • the THD element ie the electrical or electronic component, can be set up both for low voltages, ie voltages less than 60V, or for high voltages, ie voltages greater than or equal to 60V, in particular 470V or 800V.
  • the THD element is, for example, a capacitor, in particular an intermediate circuit capacitor, a coil, in particular an inductor or interference suppression coil, or a transformer.
  • the printed circuit board and the THD element are expediently part of electronics accommodated in the electronics housing.
  • the electronics preferably include a converter, in particular an inverter, which is provided for connection to a battery and to an electric motor.
  • the electronics preferably also include a control unit for the converter.
  • electronics with the circuit board are in the electronics housing and recorded with the THD element.
  • the printed circuit board and the THD element preferably form part of the converter and/or the control unit.
  • the electronics unit also includes a cap in which the THD element is held.
  • the THD element is thus received in a receiving space encompassed by the cap.
  • the cap is mounted on the printed circuit board, in other words the cap is joined to the printed circuit board.
  • the THD element is held in the cap, its vibration and the associated risk of damage to it or damage to its soldered connection to the printed circuit board is particularly advantageous.
  • the cap also advantageously forms a (mechanical) protection against damage, in particular during assembly, when the printed circuit board with the THD element and the cap is introduced into the electronics housing. Due to the enclosing of the THD element, the cap advantageously prevents its wire connection from kinking in the area of the contact hole of the printed circuit board, both during the assembly process and as a result of vibration.
  • the cap is formed from a plastic.
  • electrical insulation of the THD element from the electronics housing is advantageously formed using the cap. Consequently, a distance between the THD element and the housing can be reduced and space can thus be saved.
  • the cap is expediently prefabricated. In other words, this is already manufactured before its assembly process on the printed circuit board as a part that is separate from the printed circuit board. Thus, the cap is attached to the THD element in the assembled state. In particular, in comparison to overmoulding the THD element with plastic, damage to it due to the comparatively high temperature of the (molten) plastic is avoided and the assembly process is simplified. If more than one THD element is arranged on the side of the printed circuit board facing the bottom, each of the THD elements, at least a subgroup thereof, is held in the cap in a suitable manner. The statements presented here then apply in an analogous manner.
  • the electronics unit is provided and set up in particular for an auxiliary unit of a motor vehicle, which auxiliary unit is preferably an electric refrigerant compressor.
  • the electrical or electronic component for through-hole mounting ie the THD element
  • the adhesive is accommodated in addition to the THD element in the accommodation space formed by means of the cap.
  • the adhesive connects the THD element to the cap at least in places.
  • the THD element and the cap are bonded to one another by means of the adhesive.
  • the glue keeps the THD element in the cap.
  • the adhesive is expediently introduced into the cap before the cap is attached to the THD element.
  • a filling opening for the adhesive is provided in the cap.
  • An undercut, a contour and/or a passage opening for the adhesive is suitably provided in the cap, so that after the drying process or hardening process the adhesive engages behind the undercut, engages in the contour or protrudes through the passage opening. In this way, a form fit of the adhesive with the cap is formed.
  • vibration damping is advantageously implemented.
  • the THD Element due to its attachment to the circuit board using its connecting wire or using its connecting wires to a comparatively high tolerance. This is counteracted by adapting the shape of the adhesive during assembly. In other words, the adhesive advantageously compensates for tolerances.
  • the cap has a spring-elastic clamping lug or several spring-elastic clamping lugs.
  • the clamping lugs are formed onto the cap. In the mounted state, these press or press against the THD element, so that vibration is dampened or even prevented due to the spring elasticity.
  • the clamping lug or lugs preferably presses in a direction which counteracts a tilting direction of the THD element due to the arrangement of its soldering points. Consequently, kinking of the wire connection of the THD element is also advantageously avoided.
  • the THD element is held in the cap by means of the spring-elastic clamping strap.
  • THD elements are held in the cap, one or more clamping lugs are provided for each of these THD elements.
  • the cap has a number of joining elements on its side facing the printed circuit board. These are preferably molded. When the cap is mounted on the printed circuit board, the joining elements are accommodated in a respective corresponding receptacle on the printed circuit board.
  • the joining elements are each designed, for example, as a joining pin or as a latching hook, with the latching hook engaging behind the printed circuit board and thus forming a form fit.
  • a tool-free and comparatively simple assembly of the cap on the printed circuit board is thus advantageously made possible.
  • the joining pins can also be thermally deformed in the assembled state to form a form fit.
  • the cap preferably has at least three joining elements, which are arranged in such a way that the associated receptacles span a plane. The joining elements are therefore not arranged on a (single) common straight line. In this way, the cap is mounted on the printed circuit board in a comparatively stable manner. In addition, the circuit board is stiffened in this area by this multiple connection.
  • the electronics unit has a guide element. This is arranged on the side of the printed circuit board facing away from the bottom of the electronics housing.
  • the guide element is arranged above the cap in a direction perpendicular to the printed circuit board.
  • the printed circuit board is arranged between the cap and the guide element.
  • a type of sandwich construction is implemented using the guide element, the printed circuit board and the cap.
  • the guide element is joined to the cap.
  • the cap has the above-mentioned joining elements, in particular designed as thermally deformable joining pins or as latching hooks, which here, however, protrude through a passage in the printed circuit board and are joined to a corresponding receptacle in the guide element.
  • the cap and the guide element are screwed together, suitably using at least one self-tapping screw.
  • the screw protrudes through an associated leadthrough of the printed circuit board. In a space-saving manner, there is therefore no separate joining of the cap and the joining element, but common joining points are provided in the printed circuit board for the cap and for the guide element.
  • this is suitably screwed on from the side facing away from the bottom before the cover for the electronics housing is applied.
  • the guide element has a guide structure for a conductor.
  • the conductor is a supply conductor or a signal conductor, which protrudes in particular through a housing opening from the outside of the housing into the interior of the housing.
  • the guide structure guides the conductor in a predetermined and defined position inside the housing.
  • the guide structure has webs or pins that protrude vertically from a base area oriented parallel to the printed circuit board.
  • the conductors are preferably additionally held by means of the guide structure.
  • the guide structure includes, for example, hook-like or loop-like extensions, which prevent the conductor from slipping undesirably, for example during assembly.
  • the guide element also has a receiving structure for a plug connection.
  • the plug connection In the assembled state, the plug connection is therefore introduced into the receiving structure and thus has a defined position.
  • the receiving structure preferably includes holding elements such as latching hooks, which secure the plug connection against being released from the receiving structure.
  • the guide element has ribs on its side facing the printed circuit board. Bending of the guide element is prevented by means of these ribs, in other words the guide element is stiffened by means of the ribs.
  • the ribs are arranged in such a way that the soldering point or the soldering points of the THD element held in the cap or of the THD elements held in the cap are arranged between the ribs are. In other words, the area between the ribs is intended for the soldering points.
  • the ribs thus form mechanical protection for these soldering points.
  • the guide element has a flat base that is arranged parallel to the printed circuit board. In this case, the ribs also serve as spacers for the base area to the printed circuit board, so that the soldering points are covered and protected by the base area.
  • the guide element has a shield which expediently extends parallel to the printed circuit board and at a distance from it.
  • Another electrical or electronic component in particular an SMD element (English: “surface-mounted device”), which is arranged between the printed circuit board and the shield, is thus covered by the shield and is protected from mechanical stress, for example during assembly another component, in particular from being damaged by an assembly tool.
  • the cap has an opening for a thermally conductive pad, ie for a so-called gap filler. If more than one THD element is held in the cap, an opening and a thermally conductive pad are preferably provided for each of the THD elements.
  • the electronic component and the electronics housing are thermally coupled to one another by means of the thermally conductive pad.
  • the THD element can advantageously be cooled, that is to say heat generated during operation of the electronics unit can be transported away in the THD element to the electronics housing. Any vibration that may be present is advantageously further damped using the thermally conductive pad.
  • the opening is expediently made in the side of the cap facing the bottom, which makes assembly easier.
  • the thermally conductive pad is arranged in the opening; in particular, the thermally conductive pad protrudes through the opening.
  • the auxiliary unit according to the invention is suitably a part of a motor vehicle.
  • the ancillary unit has an electronics unit in one of the variants presented above.
  • the ancillary unit is a pump, in particular a water or oil pump, such as a lubricant pump.
  • the ancillary unit is an adjustment drive, such as a power steering system, ie a so-called power steering.
  • the ancillary unit is suitably in electrical contact with an on-board network of the motor vehicle and is supplied with current by means of it.
  • the electrical system of the motor vehicle is a low-voltage electrical system and carries an electrical voltage of 12 volts, 24 volts or 48 volts, for example.
  • the electrical voltage which is present at the ancillary unit during operation or which is present in the vehicle electrical system is 288 V, 470 V, 650 V or 800 V (volts).
  • the ancillary unit particularly preferably has an electrical machine which is, for example, a generator or an electric motor.
  • the electric motor is, for example, a commutator motor with brushes.
  • the electric motor is particularly preferably designed to be brushless and suitably a brushless direct current motor (BLDC).
  • BLDC brushless direct current motor
  • the electric motor is, for example, an asynchronous motor or a synchronous motor.
  • the ancillary unit is particularly preferably an electric refrigerant drive, which is in particular an electric motor-driven refrigerant compressor.
  • the electromotive refrigerant compressor is suitably a component of a refrigerant circuit of the motor vehicle, by means of which during operation, for example, temperature control of the interior of the motor vehicle and/or cooling of an energy store of the motor vehicle takes place.
  • FIG. 1 shows a schematic longitudinal section of an auxiliary unit designed as an electromotive refrigerant compressor, this having an electronics unit in whose electronics housing a printed circuit board and electronic components connected thereto are arranged for through-hole mounting, and these electronic components are held in a cap,
  • FIG. 2 is a perspective view of the printed circuit board of a first variant of the electronics unit with a view of its underside facing the bottom of the electronics housing, with the electronic components designed as capacitors and as a coil being held in the cap, and with the cap having spring-elastic clamping lugs for holding the electronic components and to dampen their vibration,
  • FIG. 3 is a perspective view of the electronics unit, top view, with a guide element for a conductor being arranged on the side of the printed circuit board facing away from the bottom, and with the guide element being joined to the cap,
  • FIG. 5 shows a perspective view of the cap according to the first variant of the electronics unit, with a view of the side of the cap facing the printed circuit board,
  • FIG. 6 shows a perspective view of the guide element with a view of its side facing the printed circuit board, the guide element having a number of ribs for reinforcement
  • 7 shows a perspective view of a detail of the electronics unit with an alternative configuration of the guide element, this additionally having a receiving structure for a plug connection, and
  • FIG. 8 shows the electronics of a second variant of the electronics unit in a perspective exploded view, with a view of the side of the printed circuit board facing the bottom, the cap having pin-shaped joining elements on its side facing the printed circuit board.
  • the auxiliary unit 2 has an electric motor 4 designed as a brushless DC motor with a cylindrical rotor 6 and with a stator 8 arranged on the circumference of the rotor 6 .
  • the rotor 6 is rotatably supported by a shaft 12 about an axis of rotation D (rotational axis).
  • the ancillary unit includes a compressor 10, which is designed here as a scroll compressor.
  • a (scroll) spiral of the scroll compressor is coupled in a torque-proof manner to the shaft 12 in order to drive it by means of the electric motor 4 , while another spiral is stationary with respect to a drive housing 14 .
  • the axis of rotation D lies in the sectional plane of FIG.
  • the electric motor 4 and the compressor 10 are arranged in the drive housing 14, which is made of a metal, for example aluminum, ie pure aluminum or an aluminum alloy. In particular, it is as Aluminum die-cast formed.
  • the drive housing 14 is essentially hollow-cylindrical and concentric to the axis of rotation D.
  • the ancillary unit 2 includes an electronics unit 16 with a cup-shaped electronics housing 18.
  • the electronics housing 18 has a base 20 which is oriented perpendicularly to the axis of rotation D. Forming the pot shape, a housing wall 22 stands up on the peripheral side of the base 20 perpendicular to the latter.
  • the base 20 serves as a partition wall between the receiving space, also referred to as the electronics compartment and comprised by the electronics housing 18, and the space area 24 through which a refrigerant flows, in which the electric motor 4 is also arranged.
  • the electronics compartment and the area through which the refrigerant flows (motor compartment) 24 are separated from one another in a pressure-tight manner by means of the base 20 as a partition.
  • the electronics compartment is arranged at an axial end of the drive housing 14 and is sealed in a fluid-tight manner by means of a cover 26 placed on the end face. So the bottom 20 is the electronics housing 18 and the drive housing 14 in common.
  • Electronics with a printed circuit board 28 are also accommodated in the electronics compartment.
  • the printed circuit board 28 is held parallel and at a distance from the base 20 of the electronics housing 18 by means of spacer elements (not shown).
  • Electronic components 30 which are provided and set up for through-hole mounting on the circuit board 28 are arranged on the side thereof facing the base 20 .
  • These electronic components for through-hole mounting referred to as THD elements 30 for short, are shown in broken lines in FIG. 1 and are electrically connected to the circuit board 28 .
  • the THD elements 30 are held in a cap 32 in order to reduce vibration stress.
  • the printed circuit board 28 and the electronics housing 18 protrude in the radial direction R beyond the drive housing 14 .
  • the electronics housing 18 in a pocket-like depression 34 in the axial direction A on the area protruding beyond the drive housing 14 .
  • the THD elements 30 are arranged with the cap 32 in the depression 34 . Since the THD elements are comparatively large in the axial direction A, ie have an extent greater than 10 mm, in particular greater than 12 mm, installation space in the axial direction A is saved by means of the radially offset depression 34 .
  • the cap 32 is a prefabricated part which is attached to the THD elements in the assembled state and joined to the circuit board 28 .
  • the cap 32 is formed from a plastic, so that the cap 32 is used to electrically insulate the THD element 30 from the electronics housing 18 .
  • the THD elements 30 are glued to the cap 32 in a manner that is not shown in detail.
  • the adhesive is therefore also accommodated in the accommodation space for the THD elements 30 formed by means of the cap 32 .
  • the adhesive connects the respective THD element 30 to the cap 32 at least in places.
  • the cap 32 has an opening 36 on its side facing the bottom 20 , ie on its side facing away from the cover 26 .
  • the THD elements 30 are thermally connected to the base 20 of the electronics housing 18 by means of a thermally conductive pad 40 as a gap filler.
  • the thermally conductive pad 40 is seated in the opening 36 and protrudes through it.
  • the electronics of a first variant of the electronics unit 16 are shown in FIG. 2 .
  • the THD elements 30 held in the cap 32 are three intermediate circuit capacitors 30a, an interference suppression coil 30b and two further capacitors 30c and 30d.
  • the cap 32 has a spring-elastic clamping lug 38 which is formed onto the cap 32 . These press against the respective THD element 30, so that a vibration of which is dampened or even prevented due to the spring elasticity.
  • the respective clamping lug 38 causes a force towards the printed circuit board 28 and prevents—in addition to the adhesive not shown—a displacement of these THD elements 30a to 30c away from the printed circuit board 28.
  • the clamping lug 38 assigned to the THD element 30d presses laterally against the latter, so that this THD element 30d is supported against tilting.
  • a thermally conductive pad 40 is assigned to each of the THD elements 30a to 30d, which is attached to the side of the respective THD element 30 facing the base 20 and thermally couples this to the base 20 for cooling purposes.
  • the thermally conductive pads 40 assigned to the capacitors 30a are shown in dashed lines and transparently in FIG. 2 .
  • a vibration of the THD elements 30 is damped by means of the adhesive, by means of the clamping lugs 38 and by means of the respective thermally conductive pad 40 .
  • the THD elements 30 are held in the cap 32 by means of the adhesive, by means of the respective clamping lugs 38 and by means of the respective thermally conductive pad 40 .
  • the intermediate circuit capacitors 30a are connected to one another in parallel, for example.
  • one of the capacitors 30a it is expedient for one of the capacitors 30a to be rotated by approximately 45° with respect to an axis of rotation perpendicular to the printed circuit board.
  • a straight line that lies in a plane spanned by printed circuit board 28 and includes the two soldering points of twisted intermediate circuit capacitor 30a is inclined by approximately 45° to a straight line that is the two soldering points of one of the two based on the other two Includes intermediate circuit capacitors 30a.
  • the electronics unit 16 has a guide element 42 for conductors 44 , which is arranged on the side of the printed circuit board 28 facing away from the base 20 of the electronics housing 18 .
  • the printed circuit board 28 is arranged between the cap 32 and the guide element 42 in the manner of a sandwich construction.
  • the guide element 42 is joined to the cap 32 .
  • the cap and the guide element 42 are screwed together using screw elements 46 .
  • the screw elements 46 are screwed in from the side of the circuit board 28 facing away from the base 20 .
  • the screw elements 46 protrude through the guide element 42 and the printed circuit board 28 and are received in a corresponding screw receptacle 48 of the cap 32 .
  • the screw elements 46 are preferably designed as self-tapping screws.
  • the cap 32 and the guide member 42 are joined together.
  • the guide element 42 comprises a base surface (base body) which is oriented parallel to the printed circuit board 28 and is essentially flat, on which guide structures 50 for the conductors 44 are formed.
  • some of the guide structures 50 are in the form of a web 52 or pin 54 projecting perpendicularly to the base area.
  • further guide structures 50 are designed as latching hooks 56 facing one another, so that the hook-like free end secures the conductor inserted between the latching hooks 56 against being released from the defined position.
  • guide structures are designed as a holding arm 55, which at least partially encompasses the respective conductor 44 on the peripheral side.
  • the conductors 44 which are designed in particular as supply or signal conductors, are guided through a housing opening 58 in the housing wall 22 in the region of the depression into the electronics compartment, ie into the interior of the housing, and are held in a defined position.
  • the guide element 42 has a screen 60 which extends parallel to the printed circuit board 28 and at a distance from it.
  • a further electrical or electronic component of the electronics, designed here as an SMD element 62 is arranged between the printed circuit board 28 and the shield 60 . So this is covered by the screen 60 and thus protected from mechanical stress.
  • FIG. 6 shows the underside of the guide element 42 facing the circuit board 28 .
  • this On its side facing the printed circuit board 28, this has a number of ribs 64, which serve to reinforce the guide element.
  • the ribs are arranged in such a way that the soldering points of the THD elements 30a to 30d held in the cap 32 are arranged between the ribs 64 .
  • the ribs 64 serve as spacers between the base area of the guide element 42 and the printed circuit board. Consequently, the soldering points of the THD elements 30, ie the THD elements 30a to 30d, are covered and protected by the base area.
  • FIG. 7 An alternative configuration of the guide element 42 is shown in FIG. 7 .
  • the guide element 42 has a receiving structure 66 which embeds a plug connection 68 .
  • the receiving structure 66 of the guide element 42 is formed here by means of a wall that rises up perpendicularly to its base area, with a receiving region corresponding to the shape of the plug connection 68 being formed.
  • the receiving structure 66 also includes a number of latching elements 70 which, after it has been introduced into the receiving structure 66 in the course of assembly, hold the plug connection against being released from it.
  • the electronics of a second variant of the electronics unit 16 are shown in FIG. 8 .
  • the cap 32 has a number of pin-like joining elements 72 on its side facing the circuit board 28 , which are each accommodated in a corresponding receptacle 74 of the circuit board 28 .
  • the joining elements 72 are thermally deformed to form a form fit with the printed circuit board 28 on the side facing away from the base 20 .
  • the electronics unit 16 has a guide element 42 according to the first variant, with the joining elements 72 being designed as hook-shaped latching pins and protruding through the receptacles of the circuit board 28, and with the latching pins in a corresponding receptacle of the Sit guide element 42 and engage behind this.

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  • Microelectronics & Electronic Packaging (AREA)

Abstract

L'invention concerne une unité électronique (16) pour un groupe auxiliaire (2) d'un véhicule à moteur. L'unité électronique (16) présente un boîtier électronique (18) cupuliforme dans lequel est logée une carte de circuit imprimé (28), un composant électronique (30) destiné à être implanté étant agencé sur le côté de la carte de circuit imprimé (28) orienté vers la partie inférieure (20) du boîtier électronique (18), et le composant électronique (30) étant maintenu dans un couvercle (32) monté sur la carte de circuit imprimé (28) afin de réduire les contraintes liées aux vibrations. L'invention concerne par ailleurs un groupe auxiliaire (2) conçu en particulier comme entraînement électrique de fluide frigorigène, destiné à un véhicule à moteur, le groupe auxiliaire (2) présentant une unité électronique (16) de ce type.
PCT/EP2021/081314 2020-11-13 2021-11-11 Unité électronique pour un groupe auxiliaire d'un véhicule à moteur WO2022101309A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202180076713.4A CN116548074A (zh) 2020-11-13 2021-11-11 用于机动车的辅助机组的电子器件单元

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020214325.0 2020-11-13
DE102020214325 2020-11-13

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WO2022101309A1 true WO2022101309A1 (fr) 2022-05-19

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Citations (5)

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US20120081866A1 (en) * 2010-10-01 2012-04-05 Robert Bosch Gmbh Brackets for electrical components
EP2461039A1 (fr) * 2010-12-02 2012-06-06 Kabushiki Kaisha Toyota Jidoshokki Compresseur électrique
EP3240375A1 (fr) * 2016-04-25 2017-11-01 Schaeffler Technologies GmbH & Co. KG Module électronique ayant un élément de retenue ayant une conception optimisée destiné à l'utilisation améliorée de la surface du circuit imprimé
DE102018207356A1 (de) * 2018-05-11 2019-11-14 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Elektromotorisches Nebenaggregat
US20200037454A1 (en) * 2018-07-25 2020-01-30 Continental Automotive Systems, Inc. Pcb electrolytic capacitor retainer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120081866A1 (en) * 2010-10-01 2012-04-05 Robert Bosch Gmbh Brackets for electrical components
EP2461039A1 (fr) * 2010-12-02 2012-06-06 Kabushiki Kaisha Toyota Jidoshokki Compresseur électrique
EP3240375A1 (fr) * 2016-04-25 2017-11-01 Schaeffler Technologies GmbH & Co. KG Module électronique ayant un élément de retenue ayant une conception optimisée destiné à l'utilisation améliorée de la surface du circuit imprimé
DE102018207356A1 (de) * 2018-05-11 2019-11-14 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Elektromotorisches Nebenaggregat
US20200037454A1 (en) * 2018-07-25 2020-01-30 Continental Automotive Systems, Inc. Pcb electrolytic capacitor retainer

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