FR2745148A1 - Power supply circuit for electrical vehicle - Google Patents

Power supply circuit for electrical vehicle Download PDF

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Publication number
FR2745148A1
FR2745148A1 FR9601858A FR9601858A FR2745148A1 FR 2745148 A1 FR2745148 A1 FR 2745148A1 FR 9601858 A FR9601858 A FR 9601858A FR 9601858 A FR9601858 A FR 9601858A FR 2745148 A1 FR2745148 A1 FR 2745148A1
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FR
France
Prior art keywords
power supply
components
printed circuit
supply according
mechanical support
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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
FR9601858A
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French (fr)
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FR2745148B1 (en
Inventor
Gauthier Beauzemont
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.)
Sagem SA
Original Assignee
Sagem SA
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Filing date
Publication date
Application filed by Sagem SA filed Critical Sagem SA
Priority to FR9601858A priority Critical patent/FR2745148B1/en
Publication of FR2745148A1 publication Critical patent/FR2745148A1/en
Application granted granted Critical
Publication of FR2745148B1 publication Critical patent/FR2745148B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0238—Electrical distribution centers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • 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
    • 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
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
    • 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
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
    • H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
    • 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
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure

Abstract

The power supply circuits are mounted in a common external container (1). There are two separate power supply units (2,3) each mounted on its own heat sink (11,12). The heat sinks are connected to the external container. Connections between the power supply units is made by the printed circuit board (4) mounted on top of the power supply units and supported by them.

Description

Alimentation de puissance pour véhicule électrique.Power supply for electric vehicle.

Le développement de véhicules à moteur électrique pose de nombreux problèmes technologiques. Si l'on prend l'exemple d'une voiture électrique, il faut pouvoir commuter des puissances électriques relativement élevées pour alimenter le moteur à partir de la batterie ou pour recharger celle-ci depuis le secteur. The development of electric motor vehicles poses many technological problems. If we take the example of an electric car, it is necessary to be able to switch relatively high electric powers to supply the engine from the battery or to recharge it from the mains.

Si la commutation de puissance électrique n'impose que de faibles contraintes de réalisation dans des applications pour lesquelles le volume disponible n'est pas limité, il n'en est pas de même dans le domaine du transport.If the switching of electrical power imposes only low production constraints in applications for which the available volume is not limited, it is not the same in the field of transport.

En effet, les équipements logés dans le compartiment moteur d'une voiture électrique ne peuvent occuper qu'un volume restreint et sont soumis à des conditions d'environnement sévères, en particulier des vibrations et une aération limitée.In fact, the equipment housed in the engine compartment of an electric car can only occupy a limited volume and is subject to severe environmental conditions, in particular vibration and limited ventilation.

II faut donc fixer solidement les composants de masse importante, prévoir un refroidissement de ceux qui s'échauffent et assurer la qualité des liaisons électriques. It is therefore necessary to securely fix the components of large mass, provide for cooling of those which heat up and ensure the quality of the electrical connections.

Pour cela, les composants de puissance, souvent de masse importante, ont jusqu'à maintenant été fixés en divers endroits du châssis de la voiture, celui-ci assurant aussi un draînage thermique, et le câblage se présentant sous la forme de fils de liaison soudés manuellement.For this, the power components, often of large mass, have so far been fixed in various places on the chassis of the car, the latter also providing thermal drainage, and the wiring being in the form of connecting wires. manually welded.

Cependant, un tel câblage est coûteux en matériel et en main-d'oeuvre et peut présenter des défauts ou des erreurs de connexion. On pourrait songer à utiliser un circuit imprimé comme support de ces composants, mais au prix de renforts substantiels compte-tenu des vibrations. En outre, un circuit imprimé n'a qu'une puissance de dissipation thermique limitée.However, such wiring is costly in material and labor and may have connection faults or errors. One could consider using a printed circuit as a support for these components, but at the cost of substantial reinforcements taking into account the vibrations. In addition, a printed circuit has only a limited heat dissipation power.

La présente invention vise à résoudre les difficultés ci-dessus.The present invention aims to solve the above difficulties.

A cet effet7 I'invention conceme une alimentation de puissance pour véhicule électrique, comportant des composants de puissance associés à un drain thermique et reliés entre eux par des liaisons électriques, alimentation caractérisée par le fait qu'elle comporte un support mécanique des composants, assurant aussi le draînage thermique, et une carte de circuit imprimé comportant les liaisons électriques.To this end, the invention relates to a power supply for an electric vehicle, comprising power components associated with a heat sink and connected to each other by electrical connections, a supply characterized in that it comprises a mechanical support for the components, ensuring also thermal drainage, and a printed circuit board with electrical connections.

Ainsi, le circuit imprimé remplace les fils de liaison et élimine donc les risques et coûts élevés associés à ceux-ci. Comme les composants sont supportés et refroidis par le support mécanique, le circuit imprimé ne subit aucune contrainte et ne nécessite donc l'adjonction d'aucun dispositif de renfort ou de dissipation. En outre, comme le support mécanique est distinct du circuit imprimé, une intervention sur l'un d'entre eux n'affecte pas l'autre.Thus, the printed circuit replaces the connecting wires and therefore eliminates the high risks and costs associated with them. As the components are supported and cooled by the mechanical support, the printed circuit is not subjected to any constraint and therefore does not require the addition of any reinforcement or dissipation device. In addition, as the mechanical support is distinct from the printed circuit, intervention on one of them does not affect the other.

L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation préférée de l'alimentation de l'invention, en référence au dessin annexé, sur lequel: - la figure 1 est une vue latérale schématique en coupe de l'alimentation, et - la figure 2 est une vue en coupe représentant une borne de liaison électrique d'un composant de l'alimentation.The invention will be better understood using the following description of a preferred embodiment of the power supply of the invention, with reference to the attached drawing, in which: - Figure 1 is a schematic side view in section of the power supply, and - Figure 2 is a sectional view showing an electrical connection terminal of a component of the power supply.

L'alimentation représentée, un chargeur de batterie monté dans une voiture électrique, comporte un support mécanique 1 portant des composants électriques, dont seuls sont représentés ceux référencés 2, 3, reliés électriquement par les pistes d'un circuit imprimé 4.The power supply shown, a battery charger mounted in an electric car, comprises a mechanical support 1 carrying electrical components, of which only those represented 2, 3 are represented, electrically connected by the tracks of a printed circuit 4.

Le support mécanique 1 est ici un boîtier, représenté sans son couvercle, dans lequel sont logés les composants comme 2, 3, et qui assure le draînage thermique de la chaleur dissipée par ceux-ci. Dans cet exemple, le draînage est assuré de façon dynamique par un circuit hydraulique 11 de refroidissement, à écoulement perpendiculaire au plan de la figure 1, solidaire du boîtier 1.The mechanical support 1 is here a box, shown without its cover, in which the components like 2, 3 are housed, and which ensures the thermal drainage of the heat dissipated by these. In this example, the drainage is provided dynamically by a hydraulic cooling circuit 11, with flow perpendicular to the plane of FIG. 1, integral with the housing 1.

Le boîtier 1, métallique dans cet exemple, assure aussi un draînage thermique statique complémentaire. Le composant 2, ici un transistor de puissance, est fixé sur le circuit 11 par des boulons non représentés et est en contact thermique étroit avec celui-ci au moyen d'une graisse thermiquement conductrice. Le circuit 11 assure le maintien mécanique du transistor 2. Ce demier présente une masse importante, c'est-à-dire que le circuit imprimé 4 ne pourrait, sans renfort, assurer sa tenue mécanique.The housing 1, metallic in this example, also provides additional static thermal drainage. Component 2, here a power transistor, is fixed to circuit 11 by bolts not shown and is in close thermal contact therewith by means of a thermally conductive grease. The circuit 11 provides the mechanical maintenance of the transistor 2. The latter has a large mass, that is to say that the printed circuit 4 could not, without reinforcement, ensure its mechanical strength.

Le composant 3 est une bobine d'inductance, aussi de masse importante, logée dans un berceau 12, solidaire du boîtier 1, qui en épouse la forme.Component 3 is an inductance coil, also of large mass, housed in a cradle 12, integral with the housing 1, which follows its shape.

La fixation de la bobine 3 au berceau est effectuée par vissage d'oreilles 31. Une couche de graisse thermiquement conductrice assure la liaison thermique entre le berceau 12 et la bobine 3. Il aurait pu être prévu de coller les composants 2, 3 sur leur support au moyen d'une colle thermiquement conductrice. The coil 3 is fixed to the cradle by screwing on the ears 31. A layer of thermally conductive grease provides the thermal bond between the cradle 12 and the coil 3. It could have been provided to bond the components 2, 3 to their support by means of a thermally conductive adhesive.

Comme le montre la figure 2, le circuit imprimé 4 comporte, pour le raccordement par boulon des bomes des composants 2, 3, des trous métallisés comme le trou 41 qui débouche, sur chaque face, sur des plages de contact respectives 42 et 43 reliées à une piste 44. La bome 20 du transistor 2 comporte une languette percée 21 rabattue au-dessus du corps du composant 2 et emprisonnant un écrou 22 logé dans une cavité 23 de ce corps. La cavité 23 comporte une paroi 24 bloquant en rotation l'écrou 22.As shown in FIG. 2, the printed circuit 4 comprises, for the bolt connection of the terminals of the components 2, 3, metallized holes such as the hole 41 which opens, on each face, on respective contact pads 42 and 43 connected to a track 44. The terminal 20 of the transistor 2 comprises a pierced tongue 21 folded over the body of the component 2 and trapping a nut 22 housed in a cavity 23 of this body. The cavity 23 has a wall 24 blocking the nut 22 in rotation.

La bome 20 peut ainsi être fixée et reliée électriquement au circuit imprimé 4 par un boulon constitué d'une vis 25, traversant le trou 41 et la languette 21, et de l'écrou 22. Par vissage, I'écrou 22 est attiré vers la tête de la vis 25 jusqu'à appliquer la languette 21 sur la plage 42.The terminal 20 can thus be fixed and electrically connected to the printed circuit 4 by a bolt consisting of a screw 25, passing through the hole 41 and the tongue 21, and of the nut 22. By screwing, the nut 22 is attracted towards the head of the screw 25 until the tongue 21 is applied to the pad 42.

On conçoit que le transistor 2 est maintenu en place par un serrage suffisant de la languette 21, avec éventuellement une rondelle élastique.It is understood that the transistor 2 is held in place by sufficient tightening of the tongue 21, possibly with an elastic washer.

De ce fait, la butée latérale que constitue le pourtour du trou de la languette 21 pour la vis 25 ne sert de centrage que lors du montage de celle-ci et ne participe pas au maintien en position. II aurait donc pu être prévu une languette non percée, associée à une vis passant latéralement.Therefore, the lateral stop that constitutes the periphery of the hole of the tongue 21 for the screw 25 only serves for centering during the mounting of the latter and does not participate in maintaining it in position. An undrilled tongue could therefore have been provided, associated with a screw passing laterally.

La bobine 3 comporte, de façon homologue, un bomier 30 avec des bomes du genre de la bome 20, les extrémités de fil de la bobine 3 étant raccordées par sertissage à une extrémité de la languette de raccordement.The coil 3 comprises, in a homologous manner, a bomier 30 with booms of the boom type 20, the wire ends of the coil 3 being connected by crimping to one end of the connecting tab.

D'autres moyens de raccordement électrique peuvent être envisagés, par exemple des connecteurs ou encore des liaisons par un conducteur souple évitant tout transfert de contrainte mécanique au circuit 4, due par exemple aux vibrations des composants de masse importante.Other means of electrical connection can be envisaged, for example connectors or else connections by a flexible conductor avoiding any transfer of mechanical stress to circuit 4, due for example to vibrations of components of large mass.

Les bomes ou bomier 20 et 30 de raccordement sont ici disposés à une extrémité des composants 2, 3 respectifs, ce qui permet de monter ceuxci à effleurement du circuit imprimé 4. On aurait cependant pu prévoir une fenêtre découpée dans le circuit imprimé 4 à travers laquelle émergerait une partie d'un composant électrique.The connection bomes or bomier 20 and 30 are here arranged at one end of the respective components 2, 3, which makes it possible to mount these by touching the printed circuit 4. However, one could have provided a window cut out in the printed circuit 4 through which would emerge part of an electrical component.

L'invention s'applique à tout type de véhicule, terrestre ou non. The invention applies to any type of vehicle, land or not.

Claims (7)

REVENDICATIONS 1.- Alimentation de puissance pour véhicule électrique, comportant des composants de puissance (2, 3) associés à un drain thermique (1, 11) et reliés entre eux par des liaisons électriques (44), alimentation caractérisée par le fait qu'elle comporte un support mécanique des composants (1), assurant aussi le draînage thermique, et une carte de circuit imprimé (4) comportant lesdites liaisons électriques (44).1.- Power supply for an electric vehicle, comprising power components (2, 3) associated with a heat sink (1, 11) and connected together by electrical connections (44), power supply characterized by the fact that it comprises a mechanical support for the components (1), also ensuring thermal drainage, and a printed circuit board (4) comprising said electrical connections (44). 2.- Alimentation selon la revendication 1, dans laquelle le support mécanique (1) comporte un berceau (12) de réception d'un composant (3).2.- Power supply according to claim 1, wherein the mechanical support (1) comprises a cradle (12) for receiving a component (3). 3.- Alimentation selon l'une des revendications 1 et 2, dans laquelle la carte de circuit imprimé (4) comporte des moyens de raccordement électrique (41-44), par vissage, de bornes (20) de composants.3.- Power supply according to one of claims 1 and 2, wherein the printed circuit board (4) comprises electrical connection means (41-44), by screwing, of terminals (20) of components. 4.- Alimentation selon la revendication 3, dans laquelle les bomes (20) comportent une languette de contact (21) agencée pour être appliquée sur une plage de contact (42) du circuit imprimé (4) par un boulon (22, 25) traversant celui-ci.4.- Power supply according to claim 3, wherein the bomes (20) comprise a contact tab (21) arranged to be applied on a contact pad (42) of the printed circuit (4) by a bolt (22, 25) crossing this one. 5.- Alimentation selon la revendication 4, dans laquelle la bome (20) est agencée pour retenir prisonnier l'écrou (22) du boulon et le bloquer en rotation (24).5.- Supply according to claim 4, wherein the boom (20) is arranged to hold the nut (22) of the bolt captive and block it in rotation (24). 6.- Alimentation selon les revendications 1 à 5, dans laquelle le support mécanique (1) comporte un circuit hydraulique (11) de draînage thermique.6.- Supply according to claims 1 to 5, wherein the mechanical support (1) comprises a hydraulic circuit (11) of thermal drainage. 7.- Alimentation selon les revendications 1 à 6, dans laquelle des composants sont fixés au support (1, 11, 12) par une colle à conductibilité thermique. 7.- Power supply according to claims 1 to 6, in which components are fixed to the support (1, 11, 12) by an adhesive with thermal conductivity.
FR9601858A 1996-02-15 1996-02-15 POWER SUPPLY FOR ELECTRIC VEHICLE Expired - Lifetime FR2745148B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9601858A FR2745148B1 (en) 1996-02-15 1996-02-15 POWER SUPPLY FOR ELECTRIC VEHICLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9601858A FR2745148B1 (en) 1996-02-15 1996-02-15 POWER SUPPLY FOR ELECTRIC VEHICLE

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FR2745148A1 true FR2745148A1 (en) 1997-08-22
FR2745148B1 FR2745148B1 (en) 1998-04-10

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2823666A1 (en) * 1978-05-31 1979-12-06 Bosch Gmbh Robert Electronic control device for engines of motor vehicles - has strip with fuel channels and supporting power stage with case filled with foamed material
DE3514440A1 (en) * 1985-04-20 1986-10-23 Robert Bosch Gmbh, 7000 Stuttgart HOUSING FOR RECEIVING ELECTRICAL CONTROL UNITS, ESPECIALLY FOR MOTOR VEHICLES
DE4224720A1 (en) * 1992-07-27 1994-02-03 Duerrwaechter E Dr Doduco Circuit housing for motor vehicle ignition circuitry - has water-tight lid, moulded electrical connector and heat sink for power semiconductor devices moulded into wall of housing
DE4307902C1 (en) * 1993-03-12 1994-06-09 Bosch Gmbh Robert Cooled reception housing for automobile electronic control devices - with circulated cooling medium fed through cooling device above cooling jacket enclosing housing
DE4240755A1 (en) * 1992-12-03 1994-06-16 Siemens Ag Electronic control device for motor vehicle engine or ABS system - has cooling plate with PCBs fixed on both sides and with housing fixing section which extends out of housing
DE4242944A1 (en) * 1992-12-18 1994-06-23 Bosch Gmbh Robert Electric control device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2823666A1 (en) * 1978-05-31 1979-12-06 Bosch Gmbh Robert Electronic control device for engines of motor vehicles - has strip with fuel channels and supporting power stage with case filled with foamed material
DE3514440A1 (en) * 1985-04-20 1986-10-23 Robert Bosch Gmbh, 7000 Stuttgart HOUSING FOR RECEIVING ELECTRICAL CONTROL UNITS, ESPECIALLY FOR MOTOR VEHICLES
DE4224720A1 (en) * 1992-07-27 1994-02-03 Duerrwaechter E Dr Doduco Circuit housing for motor vehicle ignition circuitry - has water-tight lid, moulded electrical connector and heat sink for power semiconductor devices moulded into wall of housing
DE4240755A1 (en) * 1992-12-03 1994-06-16 Siemens Ag Electronic control device for motor vehicle engine or ABS system - has cooling plate with PCBs fixed on both sides and with housing fixing section which extends out of housing
DE4242944A1 (en) * 1992-12-18 1994-06-23 Bosch Gmbh Robert Electric control device
DE4307902C1 (en) * 1993-03-12 1994-06-09 Bosch Gmbh Robert Cooled reception housing for automobile electronic control devices - with circulated cooling medium fed through cooling device above cooling jacket enclosing housing

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