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EP2856563A1 - Electrical circuit for the interconnection of an electrical component, such as a power component - Google Patents

Electrical circuit for the interconnection of an electrical component, such as a power component

Info

Publication number
EP2856563A1
EP2856563A1 EP13731378.9A EP13731378A EP2856563A1 EP 2856563 A1 EP2856563 A1 EP 2856563A1 EP 13731378 A EP13731378 A EP 13731378A EP 2856563 A1 EP2856563 A1 EP 2856563A1
Authority
EP
European Patent Office
Prior art keywords
contact
electrical
component
flex circuit
circuit
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.)
Granted
Application number
EP13731378.9A
Other languages
German (de)
French (fr)
Other versions
EP2856563B1 (en
Inventor
Tony Lhommeau
Stéphane SOREL
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.)
Safran Electrical and Power SAS
Original Assignee
Hispano Suiza SA
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 Hispano Suiza SA filed Critical Hispano Suiza SA
Publication of EP2856563A1 publication Critical patent/EP2856563A1/en
Application granted granted Critical
Publication of EP2856563B1 publication Critical patent/EP2856563B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/57—Fixed connections for rigid printed circuits or like structures characterised by the terminals surface mounting terminals
    • 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
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/592—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connections to contact elements
    • 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
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • 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
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/61—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/613—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to flexible printed circuits, flat or ribbon cables or like structures by means of interconnecting elements
    • H01R12/616—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to flexible printed circuits, flat or ribbon cables or like structures by means of interconnecting elements having contacts penetrating insulation for making contact with conductors, e.g. needle points

Definitions

  • the invention relates to an electrical circuit comprising flexible electrical circuits called flex circuits, and the application of this circuit to the interconnection of power converters intended in particular to be embedded, in particular integrated in harsh environments and in the management of currents. between 1A and 200A.
  • the invention applies in particular to the control electronics of aircraft actuators, such as braking actuators, flight control actuators, etc.
  • low-power converters are generally composed of power switches that provide modulation of energy transfer from one electrical network to another, decoupling capacitors that absorb the energy transfer modulation and a power supply. electronics that controls these switches according to a logic defined by the user.
  • the transfer of energy is controlled by a transfer modulation, called switching, which consists of alternating coupling and decoupling of the two networks, one network is treated by the switches as a voltage source and the other network as a Power source.
  • the integration of the power switches with the decoupling capacitors is a key point of the operation of the system because the dynamics of the switching currents of the power source by the power switches is important.
  • the solutions currently used to limit overvoltage problems is to position the metallic conductive elements of the voltage source so as to minimize the parasitic interconnection inductance between the voltage switches. power and decoupling capability, in particular by superimposing these conductive elements.
  • the low-power converters are made from so-called discrete power components and passive components such as capacitors and inductors, and are integrated on rigid multilayer printed circuit boards, called PCB ("printed circuit board" in English). ), or from power modules and passive components interconnected via a rigid busbar electric circuit, called rigid busbar, composed of layers of conductors separated from each other by layers of electrical insulation.
  • PCB printed circuit board
  • thermomechanical constraints related to the integration of the multiple materials involved metallic polymers, etc.
  • thermomechanical constraints related to the integration of the multiple materials involved (metallic polymers, etc.), which have different own thermal expansion constants, and therefore is likely to generate significant thermomechanical stresses on the contact parts, including contact solder joints of the assembly, which limits the life and reliability of the latter.
  • the so-called discrete power components for example pinned electrical modules, are mounted on a rigid card carrier (PCB) consisting of a succession of layers of insulators and conductors.
  • PCB rigid card carrier
  • the control of the power components is usually embedded on this map.
  • This assembly solution practical and of a relevant cost, is generally used for the realization of converters of low or medium power. In addition, it integrates the interconnection of power components and control components.
  • this component assembly solution does not offer an ease of physical integration of these components in the three axes of space or in 3D and its lifetime as well as the reliability of operation remain limited, in particular in the case of high thermal cycles and / or frequent operation.
  • the power components are generally carried on a rigid support that can be shaped by folding, generally composed of layers of conductors separated layers of electrical insulation.
  • the connection with the control of the components is done via connections on power modules.
  • These assemblies are of high cost, being generally used for the realization of medium and high power converters. They offer integration facilities 3 D components that remain limited, however.
  • the removable screw-nut interconnection means that can be used limit the mechanical integration of the components and increase the assembly costs.
  • the invention aims to provide an interconnection of power components on embedded electrical circuit assemblies, in particular integrated in harsh environments and ensuring the management of currents greater than 1A and less than 200A.
  • An electric circuit according to claim 1 is provided.
  • homogeneous current density is meant a substantially constant current density at any point on the contact surface.
  • Said current density is advantageously between 4.5 and 5.5 A / mm 2 , preferably between 4.8 and 5.2 A / mm 2 and in particular is equal to 5 A / mm 2 .
  • Such an electrical circuit thus makes it possible to connect an electrical power component to an electric flex circuit, a relatively flexible circuit and therefore adaptable to 3 D in an available space, by limiting the current density on the contacts, which has the effect of reducing on the one hand, the current transmission heat on the contact parts and on the other hand, the mechanical stresses on the contact parts.
  • This control of the current flow density on the contact parts of the component to the flex circuit then allows the latter to withstand a greater electric current than that of a conventional assembly and thus allows a connection of a power component to the flex circuit thus equipped in currents between 1 and 200 A, in particular currents from 30 to 80 A.
  • Said electrically conductive part is advantageously a metal part, preferably made of copper, brass or aluminum, having relatively large and massive contact parts, which makes it possible to control the current flow density in the contact zone and to absorb the local concentrations of mechanical stress in this contact zone.
  • the electrical conductive part may be in the form of a cylindrical sleeve or a cylindrical sleeve portion provided with a flat ring, the first contact portion being formed by the cylindrical inner face of the sleeve or the sleeve portion and the second contact portion is constituted by a face of the crown.
  • the width range of said second contact portion may in particular correspond to the width of the flex circuit.
  • the lengthwise extent (transverse to the width) of the second contact portion is then adjusted to provide a clean contact surface for transmitting said electrical current density below 20 A / mm 2 .
  • said electrical conductive part is advantageously shaped to allow a junction of the contact parts with the flex circuit and the component that can be performed in a given joining method, for example soft or hard soldering, electrical or laser welding, sintering etc.
  • the first contact portion may have a complementary surface of the contact element of the component, for example the pin or contact tab of the component, being shaped to come into contact with the contact element of the component, in particular the said pin of contact or said contact tab of the component.
  • the second contact portion may have a flat surface shaped to come into plane contact with said conductive layer of the flex circuit.
  • the electrical conductive part or current diffuser advantageously has the shape of a cylindrical sleeve provided with a flat ring at one of its ends or on its periphery, being shaped to come into contact with a pin pin of component by the cylindrical inner face of the sleeve and come into contact with a conductive layer of the flex circuit by an outer face of the ring.
  • the first contact portion is thus constituted by at least a portion of the cylindrical inner face of the sleeve.
  • the second contact portion is then constituted by said outer face of the ring.
  • the first contact portion may further be cylinder portion-shaped, contacting an end portion of a contact pin of the electrical component and a portion of the contact pin section, and the second portion contact is a flat ring applied by its outer surface to the surface of the lower conductive layer of the flex circuit.
  • the contact pin or pin pin can be further mounted through, partially or completely, the flex circuit, for example by a metallized hole or via flex circuit.
  • the flex circuit consisting of copper layers insulated from each other by a layer of dielectric insulation, advantageously has a section of thickness less than about 30 micrometers, which allows the bending and twisting of the flex circuit, for example in adaptation to a space available in an integrated environment, and to provide at least one axis of freedom to said electrical component connected thereto.
  • the flex circuit advantageously consists of two copper layers insulated from each other by a middle layer of dielectric insulator.
  • the flex circuit may further comprise said power component of other electrical components, for example one or more passive components, advantageously a control component of the circuit.
  • Said dielectric insulator is advantageously a polyimide resin, which is resistant to a temperature greater than 200 ° C., which makes it possible to realize, besides a brazed assembly at a high temperature improving the reliability and the service life of the assembly, a mounting resistant to overheating in a confined environment.
  • FIG. 1 is a diagrammatic elevational view of an electrical circuit according to one embodiment of the invention, and FIG. similar view to Figure 1 of an alternative embodiment.
  • longitudinal and transverse describe elements respectively extending in a given direction and in a plane perpendicular to this direction.
  • the electric circuit shown comprises a flex circuit 1 which is a double-sided flex circuit comprising two printed flat electrical conductive layers 3, made of copper, for example. These conductive layers 3 are superimposed and insulated from each other by a layer of medium planar dielectric resin 5, high thermal resistance, of polyimide type for example.
  • the thickness of each of the conductive and insulating layers 5 is here equal to about 10 micrometers. Therefore, the thickness of the section of the flex circuit is about 30 micrometers, which gives it a bending and twisting ability.
  • the width of the flex circuit is equal to 3 to 5 centimeters, which allows the transmission by the circuit of a current of 50 to 70 A for a current density passing in the flex below 10A / mm 2 .
  • Such a current may indeed be that of an electrical component, for example that of a low to medium power component (not shown), as will be described below.
  • the flex circuit 1 comprises two parts 7 forming a contact interface between the flex circuit and the power component. These contact parts 7 are hereinafter referred to as electric current diffusers.
  • the component may comprise two pin-shaped cylindrical contact pins 9 (only represented).
  • the electrical connection of these pins 9 with the flex circuit 1 is realized by means of the two electrical conductive parts or electric current diffusing devices 7.
  • These devices for diffusing electric current 7 in fact connect each of the pins 9 of the electrical component to a respective conductive layer 3 of the flex circuit.
  • These pins 9 are each disposed in a metallized hole or via 1 1 formed in the flex circuit, perpendicular to the surface of the latter.
  • a lower via 1 1 on the flex circuit is thus formed for the left pin 9 (left in the figure) and an upper via 1 1 on the flex circuit is formed for the right pin.
  • the electric current diffusers 7 are identical, each consisting of a good electrical conductor metal part, preferably copper, and having two contact portions 13, 15, each configured, respectively, to be applied in electrical contact with one another. pins 9 of the electrical component and with a conductive layer 3 of the flex circuit.
  • the current diffuser part 7 here has the shape of a cylindrical sleeve 17 provided with a flat ring 19 at one of its ends, being shaped to come into contact with a pin pin 9 of the component by the cylindrical internal face 21 the sleeve and come into contact with a conductive layer 3 of the flex circuit by an outer face 23 of the ring.
  • the first contact portion 13 is thus constituted by the cylindrical inner face 21 of the sleeve.
  • the second contact portion 15 is then constituted by said outer face 23 of the ring.
  • the contact junction of the two contact parts 13, 15, respectively with a pin 9 of the component and with a conductive layer 3 of the flex circuit, is obtained by a soldering joint of the parts.
  • This brazing provides a conductive intermediate solder layer 25 between the contact portions facing each other, those 13 corresponding to the pin 9 of the component and those 15 corresponding to the conductive layer 3 of the flex circuit, this conductive intermediate layer 25 overflowing slightly outside each contact portion 13, 15.
  • the current diffusing part 7 due to its massive appearance and the extent of its surface (of the part 15) in contact with the flex makes it possible to reduce the electrical current density in the contact zones, which is adjusted to a value of less than 20 A / mm 2 , preferably of between 4.5 and 5.5 A / mm 2 , relative to the contact surface of the contact portions 13, 15 with the component and the flex circuit, respectively.
  • This feature reduces overheating of the contact links and makes the connection assembly more reliable.
  • the massive nature of the current diffusers 7 gives them enough strength to constitute a possible mechanical connection point between the flex circuit and the component, allowing for example to mechanically link the flex circuit to the electrical component mounted knowing that the flex circuit can be deformed to fit the positioning of the component.
  • the possible deformation of the flex circuit in flexion and torsion allows to give a certain freedom of positioning of the component on the flex circuit to adapt to the available space, especially in the context of an integrated assembly.
  • the contact diffuser parts 7 may have another shape, see Figure 2, as described above.
  • This diffuser part further comprises a contact ring 19 on its periphery, substantially in the upper part of the sleeve, this ring coming into contact with its lower face with the surface of the upper conductive layer 3 of the flex.
  • the diffuser piece 7, on the right in the figure, comprises a first cylindrical portion of cylindrical portion contact 27, for example half cylindrical, coming into contact with an end portion of the pin 9 and a portion of its section. (Half), and the second contact portion is a flat ring 29 applied by its outer surface to the surface of the lower conductive layer 3 of the flex.
  • the contact pins 9 are external to the flex circuit 1, being below it.
  • the invention is not limited to the embodiments described and shown. It is for example possible to provide other forms for the contact parts of the current diffusers, which are adapted to the shape (complementary) of the contact elements of the electrical component to be mounted.

Landscapes

  • Structure Of Printed Boards (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Parts Printed On Printed Circuit Boards (AREA)
  • Contacts (AREA)

Abstract

The invention concerns an electrical circuit comprising at least one electrical component, such as a power component, and an electrical flex circuit (1), characterised in that it comprises at least one electrical conductor part (7) connecting said electrical component to said flex circuit, said electrical conductor part (7) being provided with at least a first contact portion (13) designed to receive in contact a contact element (9) of said electrical power component and a second contact portion (15) designed to receive in contact a conductive layer (3) of said electrical flex circuit, the extent of the width of the second contact portion (15) corresponding to the width of the flex circuit (1), and the extent of the length of same being adjusted to provide a contact surface capable of transmitting a density of electrical current of between 4.5 and 5.5 A/mm² and allowing the electrical circuit to support a current specific to said power component, i.e. between 30 and 80 A.

Description

CIRCUIT ELECTRIQUE POUR L'INTERCONNEXION D'UN COMPOSANT  ELECTRICAL CIRCUIT FOR INTERCONNECTING A COMPONENT
ELECTRIQUE, TEL QU'UN COMPOSANT DE PUISSANCE  ELECTRICAL, SUCH AS A POWER COMPONENT
DOMAINE TECHNIQUE TECHNICAL AREA
L'invention concerne un circuit électrique comportant des circuits électriques flexibles dits circuits flex, et l'application de ce circuit à l'interconnexion de convertisseurs de puissance destinés notamment à être embarqués, en particulier intégrés dans des environnements sévères et dans la gestion de courants compris entre 1A et 200A. The invention relates to an electrical circuit comprising flexible electrical circuits called flex circuits, and the application of this circuit to the interconnection of power converters intended in particular to be embedded, in particular integrated in harsh environments and in the management of currents. between 1A and 200A.
L'invention s'applique en particulier à l'électronique de commande d'actionneurs d'aéronefs, tels que des actionneurs de freinage, des actionneurs de commande de vol, etc..  The invention applies in particular to the control electronics of aircraft actuators, such as braking actuators, flight control actuators, etc.
ETAT DE LA TECHNIQUE STATE OF THE ART
Actuellement, les convertisseurs de faible puissance sont généralement composés d'interrupteurs de puissance qui assurent la modulation du transfert d'énergie d'un réseau électrique à un autre, de condensateurs de découplage qui absorbent la modulation de transfert d'énergie et d'une électronique qui commande ces interrupteurs selon une logique définie par l'utilisateur. Le transfert d'énergie est contrôlé par une modulation de transfert, dite de découpage, qui consiste à alterner le couplage et le découplage des deux réseaux, dont un réseau est traité par les interrupteurs comme une source de tension et l'autre réseau comme une source de courant.  Currently, low-power converters are generally composed of power switches that provide modulation of energy transfer from one electrical network to another, decoupling capacitors that absorb the energy transfer modulation and a power supply. electronics that controls these switches according to a logic defined by the user. The transfer of energy is controlled by a transfer modulation, called switching, which consists of alternating coupling and decoupling of the two networks, one network is treated by the switches as a voltage source and the other network as a Power source.
L'intégration des interrupteurs de puissance avec les condensateurs de découplage est un point clé du fonctionnement du système car la dynamique des courants de découpage de la source de courant par les interrupteurs de puissance est importante.  The integration of the power switches with the decoupling capacitors is a key point of the operation of the system because the dynamics of the switching currents of the power source by the power switches is important.
Cette dynamique des courants peut induire des surtensions sur les interrupteurs de plusieurs dizaines voire centaines de volts si l'inductance d'interconnexion entre les interrupteurs de puissance et la capacité de découplage n'est pas adaptée. Ces surtensions peuvent dégrader le rendement de la conversion électrique, dégrader les interrupteurs et rayonner de façon excessive.  This current dynamics can induce overvoltages on the switches of several tens or even hundreds of volts if the interconnection inductance between the power switches and the decoupling capacitor is not adapted. These overvoltages can degrade the efficiency of the electrical conversion, degrade the switches and radiate excessively.
Les solutions actuellement utilisées pour limiter les problèmes de surtensions est de positionner les éléments conducteurs métalliques de la source de tension de manière à minimiser l'inductance d'interconnexion parasite entre les interrupteurs de puissance et la capacité de découplage, notamment en superposant ces éléments conducteurs. The solutions currently used to limit overvoltage problems is to position the metallic conductive elements of the voltage source so as to minimize the parasitic interconnection inductance between the voltage switches. power and decoupling capability, in particular by superimposing these conductive elements.
A ce jour, les convertisseurs de faible puissance sont réalisés à partir de composants de puissance dit discrets et de composants passifs tels que des condensateurs et inductances, et sont intégrés sur des cartes imprimées multicouches rigides, dites PCB (« printed circuit board » en anglais), ou à partir de modules de puissance et de composants passifs interconnectés via un circuit électrique de bus bar rigide, dit bus bar rigide, composé de couches de conducteurs séparées les unes des autres par des couches d'isolant électrique .  To date, the low-power converters are made from so-called discrete power components and passive components such as capacitors and inductors, and are integrated on rigid multilayer printed circuit boards, called PCB ("printed circuit board" in English). ), or from power modules and passive components interconnected via a rigid busbar electric circuit, called rigid busbar, composed of layers of conductors separated from each other by layers of electrical insulation.
Actuellement, les dispositifs électroniques embarqués nécessitent d'être toujours plus intégrés, notamment pour les applications aéronautiques, ce qui implique deux contraintes:  Currently, embedded electronic devices need to be more integrated, especially for aeronautical applications, which implies two constraints:
- la structure physique de ces dispositifs doit s'adapter à l'espace disponible, ce qui a pour conséquence de réaliser des montages physiquement complexes avec les moyens actuels, lesquels sont peu adaptables physiquement car les dispositifs PCB et bus-bar sont de structure physique généralement plane par nature ;  the physical structure of these devices must adapt to the available space, which has the consequence of making physically complex assemblies with the current means, which are not physically adaptable because the PCB and bus-bar devices are of physical structure generally flat by nature;
- la structure physique de ces dispositifs doit en outre résister à une augmentation de la température ambiante liée à la nature de la fonction qui est de convertir dans un espace confiné plus d'énergie électrique et avec un certain rendement, ce qui induit des échauffements.  - The physical structure of these devices must also withstand an increase in ambient temperature related to the nature of the function is to convert in a confined space more electrical energy and with a certain efficiency, which induces heating.
Cet échauffement du système associé au report rigide de l'assemblage des composants de puissance engendre des contraintes thermomécaniques liées à l'intégration des multiples matériaux en jeu (métallique polymères, ...) , lesquels ont des constantes d'expansion thermique propres différentes, et donc est susceptible de générer des contraintes thermomécaniques importante sur les parties de contact, notamment les joints de brasure de contact de l'assemblage, ce qui limite la durée de vie et la fiabilité de ce dernier.  This heating of the system associated with the rigid transfer of the assembly of the power components generates thermomechanical constraints related to the integration of the multiple materials involved (metallic polymers, etc.), which have different own thermal expansion constants, and therefore is likely to generate significant thermomechanical stresses on the contact parts, including contact solder joints of the assembly, which limits the life and reliability of the latter.
Ainsi, les dispositifs électriques conventionnels pour l'interconnexion de convertisseurs électriques ont une température limitée de fonctionnement et ne conviennent pas dans des environnements sujets à un échauffement.  Thus, conventional electrical devices for interconnecting electric converters have a limited operating temperature and are unsuitable in environments subject to heating.
Actuellement, ces dispositifs sont généralement réalisés, soit par montage de composants dits discrets tels que supports à carte PCB, soit par BUS BAR.  Currently, these devices are generally made either by mounting so-called discrete components such as PCB supports, or BUS BAR.
Les composants de puissance dits discrets, par exemple des modules électriques à picots, sont montés sur un support à carte rigide (PCB) composé d'une succession de couches d'isolants et de conducteurs. La commande des composants de puissance est généralement intégrée sur cette carte. Cette solution d'assemblage, pratique et d'un coût pertinent, est généralement utilisée pour la réalisation de convertisseurs de faible ou moyenne puissance. De plus, elle permet d'intégrer l'interconnexion des composants de puissance et des composants de commande. Cependant, cette solution d'assemblage des composants n'offre pas une facilité d'intégration physique de ceux-ci dans les trois axes de l'espace ou en 3D et sa durée de vie ainsi que la fiabilité de fonctionnement restent limitées, en particulier dans le cas de cycles thermiques élevés et/ou fréquents de fonctionnement. The so-called discrete power components, for example pinned electrical modules, are mounted on a rigid card carrier (PCB) consisting of a succession of layers of insulators and conductors. The control of the power components is usually embedded on this map. This assembly solution, practical and of a relevant cost, is generally used for the realization of converters of low or medium power. In addition, it integrates the interconnection of power components and control components. However, this component assembly solution does not offer an ease of physical integration of these components in the three axes of space or in 3D and its lifetime as well as the reliability of operation remain limited, in particular in the case of high thermal cycles and / or frequent operation.
Dans les montages par bus bar, les composants de puissance sont généralement reportés sur un support rigide pouvant être mis en forme par pliage, composés généralement de couches de conducteurs séparées de couches d'isolant électrique. La connexion avec la commande des composants se fait via des connectiques sur des modules de puissance. Ces montages sont d'un cout élevé, étant généralement utilisés pour la réalisation de convertisseurs de moyenne et forte puissance. Ils offrent des facilités d'intégration 3 D des composants qui restent cependant limitées. Par ailleurs, les moyens d'interconnexion démontables de type vis-écrou qui peuvent être utilisés limitent l'intégration mécanique des composants et augmentent les coûts de montage.  In bus bar assemblies, the power components are generally carried on a rigid support that can be shaped by folding, generally composed of layers of conductors separated layers of electrical insulation. The connection with the control of the components is done via connections on power modules. These assemblies are of high cost, being generally used for the realization of medium and high power converters. They offer integration facilities 3 D components that remain limited, however. Moreover, the removable screw-nut interconnection means that can be used limit the mechanical integration of the components and increase the assembly costs.
EXPOSE DE L'INVENTION SUMMARY OF THE INVENTION
L'invention vise à réaliser une interconnexion de composants de puissance sur des montages de circuit électrique embarqués, notamment intégrés dans des environnements sévères et assurant la gestion de courants supérieurs à 1A et inférieurs à 200A. The invention aims to provide an interconnection of power components on embedded electrical circuit assemblies, in particular integrated in harsh environments and ensuring the management of currents greater than 1A and less than 200A.
Il est proposé un circuit électrique conforme à la revendication 1 . An electric circuit according to claim 1 is provided.
On entend par densité de courant homogène une densité de courant sensiblement constante en tout point de la surface de contact. By homogeneous current density is meant a substantially constant current density at any point on the contact surface.
Ladite densité de courant est avantageusement comprise entre 4,5 et 5,5 A/mm2, de préférence comprise entre 4,8 et 5,2 A/ mm2 et en particulier est égale à 5 A/ mm2. Said current density is advantageously between 4.5 and 5.5 A / mm 2 , preferably between 4.8 and 5.2 A / mm 2 and in particular is equal to 5 A / mm 2 .
Un tel circuit électrique permet ainsi de relier un composant de puissance électrique à un circuit flex électrique, circuit relativement souple et donc adaptable en 3 D dans un espace disponible, en limitant la densité de courant sur les contacts, ce qui a pour effet de réduire d'une part, échauffement de transmission du courant sur les parties de contact et d'autre part, les contraintes mécaniques sur les parties de contact. Cette maîtrise de la densité de passage du courant sur les parties de contact du composant au circuit flex permet alors à ce dernier de supporter un courant électrique plus important que celui d'un montage classique et donc autorise une connexion d'un composant de puissance au circuit flex ainsi équipé dans des courants compris entre 1 et 200 A, en particulier des courants de 30 à 80 A. Such an electrical circuit thus makes it possible to connect an electrical power component to an electric flex circuit, a relatively flexible circuit and therefore adaptable to 3 D in an available space, by limiting the current density on the contacts, which has the effect of reducing on the one hand, the current transmission heat on the contact parts and on the other hand, the mechanical stresses on the contact parts. This control of the current flow density on the contact parts of the component to the flex circuit then allows the latter to withstand a greater electric current than that of a conventional assembly and thus allows a connection of a power component to the flex circuit thus equipped in currents between 1 and 200 A, in particular currents from 30 to 80 A.
Ladite pièce conductrice électrique est avantageusement une pièce métallique, de préférence en cuivre, laiton ou aluminium, comportant des parties de contact relativement étendues et massives, ce qui permet de maîtriser la densité de passage du courant dans la zone de contact et d'absorber les concentrations locales d'effort mécanique dans cette zone de contact. Said electrically conductive part is advantageously a metal part, preferably made of copper, brass or aluminum, having relatively large and massive contact parts, which makes it possible to control the current flow density in the contact zone and to absorb the local concentrations of mechanical stress in this contact zone.
La pièce conductrice électrique peut avoir la forme d'un manchon cylindrique ou d'une portion de manchon cylindrique pourvu d'une couronne plate, la première partie de contact étant constituée par la face interne cylindrique du manchon ou de la portion de manchon et la deuxième partie de contact est constituée par une face de la couronne. The electrical conductive part may be in the form of a cylindrical sleeve or a cylindrical sleeve portion provided with a flat ring, the first contact portion being formed by the cylindrical inner face of the sleeve or the sleeve portion and the second contact portion is constituted by a face of the crown.
L'étendue en largeur de ladite deuxième partie de contact peut notamment correspondre jusqu'à la largeur du circuit flex. L'étendue en longueur (transversalement à la largeur) de la deuxième partie de contact est alors ajustée pour conférer une surface de contact propre à transmettre ladite densité de courant électrique inférieure à 20 A/mm2. The width range of said second contact portion may in particular correspond to the width of the flex circuit. The lengthwise extent (transverse to the width) of the second contact portion is then adjusted to provide a clean contact surface for transmitting said electrical current density below 20 A / mm 2 .
En outre ladite pièce conductrice électrique est avantageusement conformée pour permettre une jonction des parties de contact avec le circuit flex et le composant qui puisse être effectuée dans un procédé de jonction déterminé, par exemple un brasage tendre ou dur, un soudage électrique ou laser, un frittage etc.. In addition, said electrical conductive part is advantageously shaped to allow a junction of the contact parts with the flex circuit and the component that can be performed in a given joining method, for example soft or hard soldering, electrical or laser welding, sintering etc.
La première partie de contact peut avoir une surface complémentaire de l'élément de contact du composant, par exemple de la broche ou patte de contact du composant, étant conformée pour venir en contact avec l'élément de contact du composant, en particulier ladite broche de contact ou ladite patte de contact du composant. The first contact portion may have a complementary surface of the contact element of the component, for example the pin or contact tab of the component, being shaped to come into contact with the contact element of the component, in particular the said pin of contact or said contact tab of the component.
La deuxième partie de contact peut avoir une surface plane conformée pour venir en contact plan avec ladite couche conductrice du circuit flex. The second contact portion may have a flat surface shaped to come into plane contact with said conductive layer of the flex circuit.
La pièce conductrice électrique ou diffuseur de courant a avantageusement la forme d'un manchon cylindrique pourvu d'une couronne plate à l'une de ses extrémités ou sur sa périphérie, étant conformée pour venir en contact avec une broche pin du composant par la face interne cylindrique du manchon et venir en contact avec une couche conductrice du circuit flex par une face externe de la couronne. The electrical conductive part or current diffuser advantageously has the shape of a cylindrical sleeve provided with a flat ring at one of its ends or on its periphery, being shaped to come into contact with a pin pin of component by the cylindrical inner face of the sleeve and come into contact with a conductive layer of the flex circuit by an outer face of the ring.
La première partie de contact est ainsi constituée par au moins une partie de la face interne cylindrique du manchon. The first contact portion is thus constituted by at least a portion of the cylindrical inner face of the sleeve.
La deuxième partie de contact est alors constituée par ladite face externe de la couronne. The second contact portion is then constituted by said outer face of the ring.
La première partie de contact peut encore être à forme de portion de cylindre, venant en contact avec une partie d'extrémité d'une broche de contact du composant électrique et sur une partie de la section de la broche de contact, et la deuxième partie de contact est une couronne plate appliquée par sa surface externe sur la surface de la couche conductrice inférieure du circuit flex. The first contact portion may further be cylinder portion-shaped, contacting an end portion of a contact pin of the electrical component and a portion of the contact pin section, and the second portion contact is a flat ring applied by its outer surface to the surface of the lower conductive layer of the flex circuit.
La broche de contact ou broche pin peut être en outre montée traversante, partiellement ou totalement, du circuit flex, par exemple par un trou métallisé ou via.du circuit flex. The contact pin or pin pin can be further mounted through, partially or completely, the flex circuit, for example by a metallized hole or via flex circuit.
Le circuit flex, constitué de couches de cuivre isolées entre elles par une couche d'isolant diélectrique, a avantageusement une section d'épaisseur inférieure à environ 30 micromètres, qui autorise la flexion et torsion du circuit flex, par exemple en adaptation à un espace disponible dans un environnement intégré, et de ménager au moins un axe de liberté audit composant électrique qui lui est relié. The flex circuit, consisting of copper layers insulated from each other by a layer of dielectric insulation, advantageously has a section of thickness less than about 30 micrometers, which allows the bending and twisting of the flex circuit, for example in adaptation to a space available in an integrated environment, and to provide at least one axis of freedom to said electrical component connected thereto.
Le circuit flex est avantageusement constitué de deux couches de cuivre isolées entre elles par une couche médiane d'isolant diélectrique. The flex circuit advantageously consists of two copper layers insulated from each other by a middle layer of dielectric insulator.
Le circuit flex peut comporter en plus dudit composant de puissance d'autres composants électriques, par exemple un ou des composants passifs, avantageusement un composant de commande du circuit. The flex circuit may further comprise said power component of other electrical components, for example one or more passive components, advantageously a control component of the circuit.
Ledit isolant diélectrique est avantageusement une résine polyimide, laquelle résiste à une température supérieure à 200°C, ce qui permet de pouvoir réaliser, outre un montage brasé à une température élevée améliorant la fiabilité et la durée de vie de l'assemblage, un montage résistant aux échauffements en environnement confiné. Said dielectric insulator is advantageously a polyimide resin, which is resistant to a temperature greater than 200 ° C., which makes it possible to realize, besides a brazed assembly at a high temperature improving the reliability and the service life of the assembly, a mounting resistant to overheating in a confined environment.
L'invention concerne également une nouvelle utilisation d'un circuit électrique tel que décrit ci dessus pour l'interconnexion de convertisseurs de puissance destinés notamment à être embarqués, en particulier intégrés dans des environnements sévères. Des exemples de réalisation de l'invention sont à présent décrits en référence au dessin annexé, sur lequel : la figure 1 est une vue schématique en élévation d'un circuit électrique selon un mode de réalisation de l'invention et la figure 2 est une vue analogue à la figure 1 d'une variante de réalisation. DESCRIPTION DETAILLEE The invention also relates to a new use of an electrical circuit as described above for the interconnection of power converters intended in particular to be embedded, in particular integrated in harsh environments. Embodiments of the invention will now be described with reference to the accompanying drawings, in which: FIG. 1 is a diagrammatic elevational view of an electrical circuit according to one embodiment of the invention, and FIG. similar view to Figure 1 of an alternative embodiment. DETAILED DESCRIPTION
Des signes de référence identiques, utilisés dans les figures, se rapportent à des éléments identiques ou techniquement équivalents.  Identical reference signs, used in the figures, refer to identical or technically equivalent elements.
Les termes « supérieur », « médian » et « inférieur » se réfèrent au positionnement relatif en mode standard d'utilisation ou de montage.  The terms "upper", "middle" and "lower" refer to relative positioning in standard mode of use or mounting.
Les termes « longitudinal » et « transversal » qualifient des éléments s'étendant respectivement selon une direction donnée et selon un plan perpendiculaire à cette direction.  The terms "longitudinal" and "transverse" describe elements respectively extending in a given direction and in a plane perpendicular to this direction.
Avec référence à la figure 1 , le circuit électrique représenté comprend un circuit flex 1 qui est un circuit flex double face comportant deux couches conductrices électriques planes imprimées 3, en cuivre par exemple. Ces couches conductrices 3 sont superposées et isolées l'une de l'autre par une couche de résine diélectrique plane médiane 5, à haute résistance thermique, de type polyimide par exemple. L'épaisseur de chacune des couches conductrices 3 et isolante 5 est égale ici à environ 10 micromètres. Par conséquent, l'épaisseur de la section du circuit flex est d'environ 30 micromètres, ce qui lui confère une capacité de flexion et torsion. La largeur du circuit flex est égale à 3 à 5 centimètres, ce qui autorise la transmission par le circuit d'un courant de 50 à 70 A pour une densité de courant passant dans le flex inférieure à 10A /mm2. Un tel courant peut en effet être celui d'un composant électrique, par exemple celui d'un composant de faible à moyenne puissance (non représenté), tel qu'il sera décrit ci après . With reference to FIG. 1, the electric circuit shown comprises a flex circuit 1 which is a double-sided flex circuit comprising two printed flat electrical conductive layers 3, made of copper, for example. These conductive layers 3 are superimposed and insulated from each other by a layer of medium planar dielectric resin 5, high thermal resistance, of polyimide type for example. The thickness of each of the conductive and insulating layers 5 is here equal to about 10 micrometers. Therefore, the thickness of the section of the flex circuit is about 30 micrometers, which gives it a bending and twisting ability. The width of the flex circuit is equal to 3 to 5 centimeters, which allows the transmission by the circuit of a current of 50 to 70 A for a current density passing in the flex below 10A / mm 2 . Such a current may indeed be that of an electrical component, for example that of a low to medium power component (not shown), as will be described below.
Le circuit flex 1 comprend deux pièces 7 formant interface de contact entre le circuit flex et le composant de puissance. Ces pièces de contact 7 sont dénommées ci après dispositifs diffuseurs de courant électrique. The flex circuit 1 comprises two parts 7 forming a contact interface between the flex circuit and the power component. These contact parts 7 are hereinafter referred to as electric current diffusers.
Le composant peut comporter deux broches de contact cylindriques 9 à forme de pin (seules représentées). La liaison électrique de ces broches 9 avec le circuit flex 1 est réalisée au moyen des deux pièces conductrices électriques ou dispositifs diffuseurs de courant électrique 7. The component may comprise two pin-shaped cylindrical contact pins 9 (only represented). The electrical connection of these pins 9 with the flex circuit 1 is realized by means of the two electrical conductive parts or electric current diffusing devices 7.
Ces dispositifs diffuseurs de courant électrique 7 relient en effet chacune des broches 9 du composant électrique à une couche conductrice respective 3 du circuit flex. Ces broches 9 sont disposées chacune dans un trou métallisé ou via 1 1 formé dans le circuit flex, perpendiculairement à la surface de ce dernier. Un via inférieur 1 1 sur le circuit flex est ainsi formé pour la broche gauche 9 (à gauche sur la figure) et un via supérieur 1 1 sur le circuit flex est formé pour la broche droite. These devices for diffusing electric current 7 in fact connect each of the pins 9 of the electrical component to a respective conductive layer 3 of the flex circuit. These pins 9 are each disposed in a metallized hole or via 1 1 formed in the flex circuit, perpendicular to the surface of the latter. A lower via 1 1 on the flex circuit is thus formed for the left pin 9 (left in the figure) and an upper via 1 1 on the flex circuit is formed for the right pin.
Les diffuseurs de courant électrique 7 sont identiques, consistant chacun en une pièce métallique bon conducteur électrique, de préférence en cuivre, et comportant deux parties de contact 13, 15, configurées chacune, respectivement, pour s'appliquer en contact électrique avec l'une des broches 9 du composant électrique et avec une couche conductrice 3 du circuit flex. The electric current diffusers 7 are identical, each consisting of a good electrical conductor metal part, preferably copper, and having two contact portions 13, 15, each configured, respectively, to be applied in electrical contact with one another. pins 9 of the electrical component and with a conductive layer 3 of the flex circuit.
La pièce diffuseur de courant 7 a ici la forme d'un manchon cylindrique 17 pourvu d'une couronne plate 19 à l'une de ses extrémités, étant conformée pour venir en contact avec une broche pin 9 du composant par la face interne cylindrique 21 du manchon et venir en contact avec une couche conductrice 3 du circuit flex par une face externe 23 de la couronne. The current diffuser part 7 here has the shape of a cylindrical sleeve 17 provided with a flat ring 19 at one of its ends, being shaped to come into contact with a pin pin 9 of the component by the cylindrical internal face 21 the sleeve and come into contact with a conductive layer 3 of the flex circuit by an outer face 23 of the ring.
La première partie de contact 13 est ainsi constituée par la face interne cylindrique 21 du manchon. The first contact portion 13 is thus constituted by the cylindrical inner face 21 of the sleeve.
La deuxième partie de contact 15 est alors constituée par ladite face externe 23 de la couronne. The second contact portion 15 is then constituted by said outer face 23 of the ring.
La jonction de contact des deux parties de contact 13, 15, respectivement avec une broche 9 du composant et avec une couche conductrice 3 du circuit flex, est obtenue par un brasage de jonction des pièces. Ce brasage apporte une couche de brasure intermédiaire conductrice 25 entre les parties de contact en vis à vis, celles 13 correspondant à la broche 9 du composant et celles 15 correspondant à la couche conductrice 3 du circuit flex, cette couche intermédiaire conductrice de jonction 25 débordant légèrement à l'extérieur de chaque partie de contact 13, 15. The contact junction of the two contact parts 13, 15, respectively with a pin 9 of the component and with a conductive layer 3 of the flex circuit, is obtained by a soldering joint of the parts. This brazing provides a conductive intermediate solder layer 25 between the contact portions facing each other, those 13 corresponding to the pin 9 of the component and those 15 corresponding to the conductive layer 3 of the flex circuit, this conductive intermediate layer 25 overflowing slightly outside each contact portion 13, 15.
On voit sur la figure que la pièce diffuseur de courant 7 de par son aspect massif et l'étendue de sa surface (de la partie 15) en contact avec le flex permet de réduire la densité de courant électrique dans les zones de contact, laquelle est ajustée à une valeur inférieure à 20 A/mm2, de préférence comprise entre 4,5 et 5,5 A/mm2, relativement à la surface de contact des parties de contact 13, 15 avec le composant et le circuit flex, respectivement. Cette caractéristique réduit échauffement des liaisons de contact et fiabilise largement le montage de connexion. It can be seen in the figure that the current diffusing part 7 due to its massive appearance and the extent of its surface (of the part 15) in contact with the flex makes it possible to reduce the electrical current density in the contact zones, which is adjusted to a value of less than 20 A / mm 2 , preferably of between 4.5 and 5.5 A / mm 2 , relative to the contact surface of the contact portions 13, 15 with the component and the flex circuit, respectively. This feature reduces overheating of the contact links and makes the connection assembly more reliable.
De plus, le caractère massif des diffuseurs de courant 7 leur donne suffisamment de solidité pour constituer un éventuel point de liaison mécanique entre le circuit flex et le composant, permettant par exemple de lier mécaniquement le circuit flex au composant électrique monté sachant que le circuit flex peut être déformé pour s'adapter au positionnement du composant. Inversement, la déformation possible du circuit flex en flexion et en torsion permet de donner une certaine liberté de positionnement du composant sur le circuit flex pour s'adapter à l'espace disponible, notamment dans le cadre d'un montage intégré. In addition, the massive nature of the current diffusers 7 gives them enough strength to constitute a possible mechanical connection point between the flex circuit and the component, allowing for example to mechanically link the flex circuit to the electrical component mounted knowing that the flex circuit can be deformed to fit the positioning of the component. Conversely, the possible deformation of the flex circuit in flexion and torsion allows to give a certain freedom of positioning of the component on the flex circuit to adapt to the available space, especially in the context of an integrated assembly.
Les pièces diffuseurs de contact 7 peuvent avoir une autre forme, voir la figure 2, que celle décrite ci-dessus. La pièce diffuseur 7, à gauche sur la figure, a toujours une forme de manchon 17 mais celui-ci est plus long que précédemment, étant monté traversant dans le circuit flex par un via traversant 1 1 formé dans le circuit flex. Cette pièce diffuseur comporte en outre une couronne de contact 19 sur sa périphérie, sensiblement dans la partie supérieure du manchon, cette couronne venant en contact par sa face inférieure avec la surface de la couche conductrice supérieure 3 du flex. The contact diffuser parts 7 may have another shape, see Figure 2, as described above. The diffuser part 7, on the left in the figure, always has a sleeve shape 17 but this one is longer than previously, being mounted through the flex circuit by a via via 1 1 formed in the flex circuit. This diffuser part further comprises a contact ring 19 on its periphery, substantially in the upper part of the sleeve, this ring coming into contact with its lower face with the surface of the upper conductive layer 3 of the flex.
La pièce diffuseur 7, à droite sur la figure, comporte une première partie de contact de forme en portion de cylindre 27, par exemple demi cylindrique, venant en contact avec une partie d'extrémité de la broche 9 et sur une partie de sa section (la moitié), et la deuxième partie de contact est une couronne plate 29 appliquée par sa surface externe sur la surface de la couche conductrice inférieure 3 du flex. Selon cette variante, les broches de contact 9 sont externes au circuit flex 1 , étant au dessous de celui-ci. The diffuser piece 7, on the right in the figure, comprises a first cylindrical portion of cylindrical portion contact 27, for example half cylindrical, coming into contact with an end portion of the pin 9 and a portion of its section. (Half), and the second contact portion is a flat ring 29 applied by its outer surface to the surface of the lower conductive layer 3 of the flex. According to this variant, the contact pins 9 are external to the flex circuit 1, being below it.
L'invention n'est pas limitée aux exemples de réalisation décrits et représentés. Il est par exemple possible de prévoir d'autres formes pour les parties de contact des diffuseurs de courant, lesquels sont adaptés à la forme (complémentaire) des éléments de contact du composant électrique à monter. The invention is not limited to the embodiments described and shown. It is for example possible to provide other forms for the contact parts of the current diffusers, which are adapted to the shape (complementary) of the contact elements of the electrical component to be mounted.

Claims

REVENDICATIONS
1 . Circuit électrique comportant au moins un composant électrique, tel qu'un composant de puissance, et un circuit flex électrique (1 ), caractérisé en ce qu'il comprend au moins une pièce conductrice électrique (7) reliant ledit composant électrique audit circuit flex, ladite pièce conductrice électrique (7) étant pourvue d'au moins une première partie de contact (13) configurée pour recevoir en contact un élément de contact (9) dudit composant de puissance électrique et d'une deuxième partie de contact (15) configurée pour recevoir en contact une couche conductrice (3) dudit circuit flex électrique, l'étendue en largeur de la deuxième partie de contact (15) correspondant jusqu'à la largeur du circuit flex (1 ) et son étendue en longueur étant ajustée pour conférer une surface de contact propre à transmettre une densité de courant électrique comprise entre 4,5 et 5,5 A/mm2 et permettant au circuit électrique de supporter un courant propre audit composant de puissance, à savoir compris entre 30 et 80 A. 1. Electrical circuit comprising at least one electrical component, such as a power component, and an electric flex circuit (1), characterized in that it comprises at least one electrically conductive part (7) connecting said electrical component to said flex circuit, said electrically conductive member (7) being provided with at least a first contact portion (13) configured to receive in contact a contact element (9) of said electrical power component and a second configured contact portion (15) for receiving in contact a conductive layer (3) of said electric flex circuit, the width extent of the corresponding second contact portion (15) to the width of the flex circuit (1) and its length extent being adjusted to confer a contact surface adapted to transmit an electrical current density of between 4.5 and 5.5 A / mm 2 and allowing the electric circuit to withstand a current specific to said component of power, namely between 30 and 80 A.
2. Circuit électrique selon la revendication 1 , caractérisé en ce que lesdites première et deuxième parties de contact (13, 15) sont conformées pour transmettre une densité de courant électrique égale à 5 A/mm2 entre la surface de contact des parties de contact (13, 15) avec le composant et le circuit flex. 2. The electrical circuit as claimed in claim 1, characterized in that said first and second contact portions (13, 15) are shaped to transmit an electrical current density equal to 5 A / mm 2 between the contact surface of the contact parts. (13, 15) with the component and the flex circuit.
3. Circuit électrique selon la revendication 1 ou 2, dans lequel ladite pièce conductrice électrique (7) est une pièce métallique, comportant des parties de contact (13, 15) relativement étendues et massives. An electrical circuit according to claim 1 or 2, wherein said electrical conductive member (7) is a metal piece having relatively large and massive contact portions (13, 15).
4. Circuit électrique selon l'une quelconque des revendications 1 à 3, dans lequel la pièce conductrice électrique (7) a la forme d'un manchon cylindrique (17) ou d'une portion de manchon cylindrique (27) pourvu d'une couronne plate (19, 29), la première partie de contact (13) étant constituée par la face interne cylindrique (21 ) du manchon ou de la portion de manchon et la deuxième partie de contact (15) est constituée par une face de la couronne (19, 29). An electrical circuit according to any one of claims 1 to 3, wherein the electrical conductive member (7) is in the form of a cylindrical sleeve (17) or a cylindrical sleeve portion (27) provided with a flat ring (19, 29), the first contact portion (13) being constituted by the cylindrical inner face (21) of the sleeve or the sleeve portion and the second contact portion (15) is constituted by a face of the crown (19, 29).
5. Circuit électrique selon l'une quelconque des revendications précédentes, dans lequel ladite pièce conductrice électrique (7) est conformée pour permettre une jonction des parties de contact (13, 15) avec le circuit flex (1 ) et le composant dans un procédé de jonction déterminé, par exemple un brasage tendre ou dur, un soudage électrique ou laser, un frittage. An electrical circuit as claimed in any one of the preceding claims, wherein said electrical conductive member (7) is shaped to allow a junction of the contact portions (13,15) with the flex circuit (1) and the component in a process. defined junction, for example soft or hard soldering, electric or laser welding, sintering.
6. Circuit électrique selon l'une quelconque des revendications précédentes, dans lequel la première partie de contact (13) a une surface complémentaire de l'élément de contact (9) du composant, par exemple de la broche ou patte de contact du composant, étant conformée pour venir en contact avec l'élément de contact (9) du composant et la deuxième partie de contact (15) a une surface plane conformée pour venir en contact plan avec une couche conductrice (3) du circuit flex. Electrical circuit according to any one of the preceding claims, wherein the first contact portion (13) has a complementary surface of the contact element (9) of the component, for example the pin or contact tab of the component. , being shaped to come into contact with the contact element (9) of the component and the second contact portion (15) has a planar surface shaped to come into plane contact with a conductive layer (3) of the flex circuit.
7. Circuit électrique selon l'une quelconque des revendications précédentes, dans lequel la pièce diffuseur de courant (7) a la forme d'un manchon cylindrique (17) pourvu d'une couronne plate (19) à l'une de ses extrémités ou sur sa périphérie, étant conformée pour venir en contact avec une broche pin (9) du composant par la face interne cylindrique (21 ) du manchon et venir en contact avec une couche conductrice (3) du circuit flex par une face externe (23) de la couronne, la première partie de contact (13) étant constituée par au moins une partie de la face interne cylindrique du manchon (17) et la deuxième partie de contact (15) est constituée par ladite face externe (23) de la couronne. Electrical circuit according to any one of the preceding claims, wherein the current diffuser part (7) has the shape of a cylindrical sleeve (17) provided with a flat ring (19) at one of its ends. or on its periphery, being shaped to come into contact with a pin pin (9) of the component by the cylindrical inner face (21) of the sleeve and come into contact with a conductive layer (3) of the flex circuit by an external face (23). ) of the ring, the first contact portion (13) being constituted by at least a portion of the cylindrical inner face of the sleeve (17) and the second contact portion (15) is constituted by said outer face (23) of the crowned.
8. Circuit électrique selon l'une quelconque des revendications précédentes, dans lequel la première partie de contact est à forme de portion de cylindre (27), venant en contact avec une partie d'extrémité d'une broche de contact (3) du composant électrique et sur une partie de la section de la broche de contact, et la deuxième partie de contact est une couronne plate (29) appliquée par sa surface externe sur la surface de la couche conductrice inférieure (3) du circuit flex. An electrical circuit according to any one of the preceding claims, wherein the first contact portion is cylinder-shaped portion (27), contacting an end portion of a contact pin (3) of the electrical component and on a portion of the section of the contact pin, and the second contact portion is a flat ring (29) applied by its outer surface on the surface of the lower conductive layer (3) of the flex circuit.
9. Circuit électrique selon l'une quelconque des revendications précédentes, dans lequel le circuit flex (1 ), constitué de couches de cuivre (3) isolées entre elles par une couche d'isolant diélectrique (5), a une section d'épaisseur inférieure à environ 30 micromètres. 9. Electrical circuit according to any one of the preceding claims, wherein the flex circuit (1), consisting of copper layers (3) insulated from each other by a layer of dielectric insulation (5), has a thick section. less than about 30 micrometers.
10. Circuit électrique selon la revendication 9, dans lequel ledit isolant diélectrique (5) est une résine polyimide. The electrical circuit of claim 9, wherein said dielectric insulator (5) is a polyimide resin.
1 1 . Utilisation d'un circuit électrique selon l'une quelconque des revendications précédentes pour l'interconnexion de convertisseurs de puissance destinés notamment à être embarqués, en particulier intégrés dans des environnements sévères.  1 1. Use of an electrical circuit according to any one of the preceding claims for the interconnection of power converters intended in particular to be embedded, in particular integrated in harsh environments.
EP13731378.9A 2012-06-01 2013-05-30 Electrical circuit connecting an electrical component, such as power component Active EP2856563B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1255117A FR2991514B1 (en) 2012-06-01 2012-06-01 ELECTRICAL CIRCUIT COMPRISING AN ELECTRICAL COMPONENT AND AN ELECTRIC FLEX CIRCUIT CONNECTED TOGETHER BY AN ELECTRIC CONDUCTIVE PART AND USE OF SAID CIRCUIT
PCT/FR2013/051223 WO2013178957A1 (en) 2012-06-01 2013-05-30 Electrical circuit for the interconnection of an electrical component, such as a power component

Publications (2)

Publication Number Publication Date
EP2856563A1 true EP2856563A1 (en) 2015-04-08
EP2856563B1 EP2856563B1 (en) 2016-05-25

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EP13731378.9A Active EP2856563B1 (en) 2012-06-01 2013-05-30 Electrical circuit connecting an electrical component, such as power component

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US (1) US9350094B2 (en)
EP (1) EP2856563B1 (en)
JP (1) JP6235002B2 (en)
CN (1) CN104428955B (en)
BR (1) BR112014028758B1 (en)
CA (1) CA2872746C (en)
FR (1) FR2991514B1 (en)
RU (1) RU2631263C2 (en)
WO (1) WO2013178957A1 (en)

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US9972930B1 (en) * 2017-01-16 2018-05-15 Methode Electronics, Inc. Transceiver module wit flex circuit
KR20230074582A (en) * 2020-10-02 2023-05-30 셀링크 코포레이션 Forming Connections to Flexible Interconnect Circuits
EP4205242A4 (en) 2020-10-02 2024-09-04 Cellink Corp Methods and systems for connecting a flexible interconnect circuit

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Also Published As

Publication number Publication date
CA2872746C (en) 2021-03-23
RU2631263C2 (en) 2017-09-20
RU2014148979A (en) 2016-08-10
CN104428955A (en) 2015-03-18
CA2872746A1 (en) 2013-12-05
JP6235002B2 (en) 2017-11-22
JP2015520492A (en) 2015-07-16
CN104428955B (en) 2017-08-04
FR2991514B1 (en) 2016-01-29
BR112014028758A8 (en) 2018-04-03
FR2991514A1 (en) 2013-12-06
BR112014028758A2 (en) 2017-06-27
BR112014028758B1 (en) 2021-07-20
US9350094B2 (en) 2016-05-24
US20150126049A1 (en) 2015-05-07
EP2856563B1 (en) 2016-05-25
WO2013178957A1 (en) 2013-12-05

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