WO2018211204A1 - Cooling device for a motor vehicle battery - Google Patents

Cooling device for a motor vehicle battery Download PDF

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Publication number
WO2018211204A1
WO2018211204A1 PCT/FR2018/051150 FR2018051150W WO2018211204A1 WO 2018211204 A1 WO2018211204 A1 WO 2018211204A1 FR 2018051150 W FR2018051150 W FR 2018051150W WO 2018211204 A1 WO2018211204 A1 WO 2018211204A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
wall
compression means
battery
contact
Prior art date
Application number
PCT/FR2018/051150
Other languages
French (fr)
Inventor
Jean Damien MULLER
François Busson
Benjamin FAUCARD
Alaeddine HAMROUNI
Marc HERRY
Original Assignee
Valeo Systemes Thermiques
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 Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2018211204A1 publication Critical patent/WO2018211204A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to the field of cooling devices for a motor vehicle and more particularly to cooling devices for motor vehicle batteries, in particular hybrid or electric vehicles.
  • the new powertrains of motor vehicles use more and more powerful batteries that it is necessary to thermoregulate, especially to cool.
  • these batteries are arranged in a support housing and it is known to have, between these batteries and a wall of this housing, heat exchangers in which circulates a cooling fluid.
  • This cooling fluid makes it possible to recover the calories released by the batteries in operation and thus to ensure a transfer of heat between the battery and the heat exchangers in order to cool these batteries after or during their operation.
  • the heat exchangers In order to ensure optimum cooling of these batteries, the heat exchangers must be arranged in contact with these batteries in the support housing. The dimensioning of these heat exchangers must thus allow them to be housed between the wall of the support housing and a face of the batteries to be cooled, while being arranged in contact with these batteries.
  • these heat exchangers each comprise a tubular body forming one or more tubes for the circulation of a refrigerant.
  • Each of these tubular bodies has a first flat surface, for example facing the bottom wall of the support housing, and a second flat surface disposed in contact with the batteries. It is understood that it is important that the heat exchangers are disposed closer to the batteries, and advantageously in contact with them, so that the heat transfer is optimal. But the existence of games, both assembly and manufacturing, may cause the contact between the tubes of these heat exchangers and the batteries to be cooled is not assured, at least partially.
  • Cooling devices which comprise a heat exchanger, a spring element and an intermediate part forming, on the one hand, a support for the heat exchanger and, on the other hand, a support for the spring.
  • This intermediate piece may include in particular a first support portion of the exchanger, which has a flat surface serving as a support for the heat exchanger, and a second portion for holding the spring.
  • the spring may be fitted against this intermediate piece or be formed by an elastic portion of this intermediate piece and bear against the wall of the housing which extends opposite the battery relative to this spring. In a conventional vertical arrangement, the spring is thus supported on the bottom wall of the housing, namely that closest to the ground.
  • the present invention is in this context and aims to provide a cooling device for motor vehicle batteries, which is particularly easier to produce and assemble.
  • the object of the present invention thus relates to a device for cooling a battery of a motor vehicle, comprising at least a heat exchanger having a first wall intended to be pressed against the battery and a second wall opposite the first wall, the cooling device further comprising a compression means configured to press the at least one heat exchanger against the battery, this compression means having at least one contact portion intended to be disposed in contact with the second wall of the at least one heat exchanger.
  • the contact portion of the compression means extends from a first edge of the second wall of the at least one heat exchanger to a second opposite edge of the second wall.
  • the compression means is configured to exert an elastic restoring force directed towards the at least one heat exchanger, this elastic restoring force making it possible to press this at least one heat exchanger against the battery to be cooled.
  • the at least one heat exchanger of the cooling device extends mainly along a longitudinal axis and has a series of longitudinal ducts configured to allow the circulation of a cooling fluid.
  • This series of longitudinal ducts is formed by a stack of conduits in a direction of stacking transverse to the longitudinal axis.
  • the contact portion of the compression means extends from a first longitudinal end edge of the second wall of the heat exchanger, to a second longitudinal end edge of this second wall. It will be understood that the first longitudinal end edge is thus opposite to the second longitudinal end edge, along the longitudinal axis along which the heat exchanger mainly extends.
  • the compression means at its contact portion, extends over the entire longitudinal dimension of the heat exchanger. It will be understood that this characteristic is reached when the compression means covers at least 90% of this dimension.
  • the contact portion of the compression means extends from a first transverse end edge of the second wall of the heat exchanger to a second transverse end edge. of this second wall. It is understood that the first transverse end edge is thus opposite to the second transverse end edge, along the transverse stacking direction of the heat exchanger ducts.
  • the compression means at its contact portion, extends over the entire transverse dimension of the heat exchanger. It will be understood that this characteristic is achieved when the compression means covers at least 90% of this dimension.
  • the contact portion of the compression means extends over the whole of the second wall, both between the longitudinal edges and between the transverse edges of the second wall of the second wall. 'heat exchanger.
  • the contact portion of the compression means completely covers the second wall of the heat exchanger.
  • the contact portion of the compression means is in contact with the second wall of the at least one heat exchanger, all along the second wall between two opposite edges.
  • the compression means is configured so that the contact portion is in contact with the heat exchanger from one edge to the other of the latter, without there being zones. of discontinuity in this contact between the two components. It is thus understood that a large contact surface is thus created between the compression means and the heat exchanger, which allows a homogeneous distribution of the elastic restoring force exerted by the compression means on the heat exchanger, this homogeneous distribution thus being less traumatic for the heat exchanger than an elastic restoring force that would be exerted punctually on this heat exchanger.
  • the compression means is an elastic return member.
  • This elastic return member may for example be a leaf spring or a spring of synthetic material.
  • the elastic return member comprises two ends intended to be arranged in contact with a wall of a battery support case.
  • the elastic return member may comprise two contact portions respectively in contact with a heat exchanger, a stall being formed between these contact portions.
  • the cooling device can comprise two heat exchangers and a single compression means, this single compression means then being configured to simultaneously press the two heat exchangers against the battery to be cooled.
  • the cooling device thus has a smaller footprint compared to a situation in which it would be necessary to have two separate cooling devices to be able to press two heat exchangers against said battery.
  • the elastic return member is in this case configured to extend from one edge to the other of each of the heat exchangers, the stall being formed in an area where the elastic return member is not in contact with these heat exchangers.
  • an intermediate material is interposed between the contact portion of the compression means and the second wall of the heat exchanger.
  • this intermediate material is particularly facilitated, and useful, because of the size of the contact surface between the compression means and the heat exchanger. Indeed, this contact surface forms a support zone of this intermediate material, which may for example be an adhesive material.
  • the compression means is a massive element.
  • the solid member may be a cross-linked rubber or a soft plastic.
  • the choice of the type of material for the realization of this massive element may for example depend, at least in part, on the structure of the compression means.
  • the solid element according to this second embodiment comprises at least one contact portion made by a first side of this solid element.
  • the solid element also has a second side, opposite the first side, intended to be disposed in contact with a wall of a battery holder housing.
  • the solid element comprises as much contact portion as the cooling device comprises heat exchangers, each heat exchanger being disposed in contact with one of these contact portions.
  • the contact portion of the solid element has a plurality of pins.
  • the plurality of pins is formed on the first side of the solid element and the free ends of these pins participate in forming the contact surface with the heat exchanger or heat exchangers, the second side having a smooth and regular surface.
  • the solid element has a honeycomb structure.
  • honeycomb structure means a structure of honeycomb type.
  • the first side and the second side of the solid element are symmetrical, the cells being configured to pass from one side to the other the solid element forming the compression means.
  • the compression means, and the contact portion with the heat exchanger that it participates to define may have a plurality of cells.
  • the present invention also relates to a support housing of at least one battery comprising at least one battery and at least one cooling device according to the present invention.
  • the cooling device is disposed between a wall of the housing and a face of the battery.
  • the cooling device may be disposed between a bottom wall of the housing and a lower face of the battery, in a vertical arrangement of the components inside the battery support housing.
  • the weight of the battery and the weight of the heat exchanger are exerted on the compression means of the cooling device and tend to move it towards the bottom wall of the housing.
  • the means of compression is then configured to resume its original position, or at least to attempt to resume this original position, thereby exerting an elastic return force directed upwardly and towards the battery and allowing to heat the heat exchanger against this battery.
  • FIG. 1 is a diagrammatic representation of a support case for at least one battery comprising, in addition to the battery, at least one cooling device according to a first embodiment of the present invention
  • FIG. 2 is a partial diagrammatic representation, in perspective view, of the cooling device according to the first embodiment of the present invention
  • FIGS. 3 to 5 are diagrammatic representations of different variants of the cooling device according to the first embodiment of the present invention.
  • FIGS. 6 to 8 are perspective views of the cooling device according to different variants of a second embodiment of the present invention.
  • FIG. 1 shows a housing 1 for supporting at least one battery 2.
  • this housing 1 comprises at least one cooling device 3 according to a first embodiment of the present invention.
  • two identical cooling devices 3 are shown.
  • Each of these cooling devices 3 comprises at least one heat exchanger 4 and a compression means 5.
  • these cooling devices 3 are arranged between a face 6 of the battery 2 and a wall 7 of the support housing 1.
  • Each heat exchanger 4 comprises a first wall 8 intended to be pressed against the face 6 of the battery 2 and a second wall 9, opposite the first wall 8, intended to be arranged in contact with the compression means 5, and more specifically to the contact of a contact portion 10 of this compression means 5.
  • a series of ducts 13 is also provided in each heat exchanger 4, each of these ducts 13 being configured to allow the circulation of a refrigerant for capturing the calories emitted by the battery 2 when it is in operation.
  • the arrangement of these conduits 13 will be more fully detailed in the following description.
  • the compression means 5 is thus in contact both with the second wall 9 of the heat exchanger 4 and with the wall 7 of the casing 1.
  • This compression means 5 is configured to exert an elastic return force F directed towards the battery 2 and for pressing the heat exchanger 4, and more particularly the first wall 8 of the heat exchanger 4, against the battery 2 to be cooled.
  • the cooling device 3 can be arranged between a lower face 6 of the battery 2 and a bottom wall 7 of the housing 1.
  • the battery 2, the heat exchanger 4, the compression means 5 and the bottom wall 7 of the housing 1 are thus stacked in a vertical direction when in the mounted position on the chassis of the motor vehicle.
  • the heat exchanger 4 bears against the contact portion 10 of the compression means 5 and tends to move it towards the bottom wall 7 of the support housing 1.
  • the means 5 being disposed in contact with this bottom wall 7, it tends to resume its original position and to push the heat exchanger 4 away from said bottom wall 7, to the battery 2.
  • the return force is greater in return and tends to strongly press the heat exchanger 4 against the battery 2.
  • the elastic restoring force F makes it possible to press the first wall 8 of the heat exchanger 4 against the lower face 6 of the battery 2. cool, then allowing the capture, by the cooling fluid flowing in the conduits 13 of the heat exchanger 4, the calories emitted by the battery 2 during its operation.
  • the contact portion 10 of the compression means 5 extends over a large surface of the heat exchanger, and advantageously over the entire second wall 9 of the heat exchanger 4, to distribute the best efforts generated by the compression means on the heat exchanger.
  • the compression means is thus configured to be in contact with the heat exchanger from a first edge
  • the compression means 5 is an elastic return member 50 and has, in addition to the contact portion 10 two ends 14 intended to be arranged in contact with the wall 7 of the support housing 1.
  • the heat exchanger 4 of this cooling device 3 extends mainly along a longitudinal axis X.
  • a series of ducts 13 is formed in this heat exchanger 4 to allow the circulation of the refrigerant.
  • This series of ducts 13 is made along a stacking direction D transverse to the longitudinal axis X.
  • the ducts 13 are stacked on each other along this stacking direction D, each duct 13 extending along an axis parallel to the longitudinal axis X.
  • the heat exchanger 4 has a rectangular shape which comprises a first large face comparable to the first wall 8 and a second major face assimilable to the second wall 9.
  • the first wall 8 and the second wall 9 are substantially symmetrical with respect to each other and are interconnected at their transverse ends by two connecting walls 15, of rounded shape especially for reasons due to the manufacturing process of the heat exchanger 4.
  • each of these walls 8, 9 has, in the section plane defined above, two transverse end edges 211, 212.
  • each of these walls 8, 9 comprises a first transverse end edge 211 and a second transverse end edge 212, this first transverse end edge 211 and this second transverse end edge 212 being opposite to each other with respect to the stacking direction D.
  • Each of these walls 8, 9 furthermore has two longitudinal end edges 111, 112.
  • each of these walls 8, 9 also comprises a first longitudinal end edge 111 and a second longitudinal end edge 112. this first longitudinal end edge 111 and this second longitudinal end edge 112 being opposite to each other with respect to the longitudinal axis X.
  • transverse end edges 211, 212 extend along axes parallel to the longitudinal axis X and that the end edges longitudinally m, 112 extend in their directions parallel to the stacking direction D of the ducts 13.
  • the connecting walls 15 connect the transverse end edges 211, 212 of each of the walls 8, 9 of the heat exchanger 4.
  • the contact portion 10 of the compression means 5 extends between at least two opposite end edges of the second wall 9 of the heat exchanger 4. According to the first embodiment illustrated in FIG. 2 this contact portion 10 thus extends at least between two transverse end edges 211, 212 of this second wall 9.
  • the contact between this contact portion 10 and the second wall 9 is direct and continuous, all along the stacking direction D, between two opposite transverse end edges 211, 212. A smooth and even contact surface is thus formed between the contact portion 10 of the compression means 5 and the second wall 9 of the heat exchanger 4.
  • the contact surface formed between the contact portion 10 of the compression means 5 and the second wall 9 of the heat exchanger 4 also extends between two longitudinal end edges 111, 112 (here not visible), that is to say all along the heat exchanger relative to the longitudinal axis.
  • this contact surface may extend both along the longitudinal axis X and along the stacking direction D. According to this other characteristic, the contact surface then extends over the entire second wall of the heat exchanger being formed by the entirety of the contact portion of the compression means. According to any one of these three characteristics, it is understood that the contact surface is large relative to the dimensions of the heat exchanger. This large contact area makes it possible in particular to distribute homogeneously the elastic restoring force exerted by the compression means on the heat exchanger. Thus, the effort collected by this heat exchanger is less traumatic and this heat exchanger then deteriorates less quickly.
  • the elastic return member 50 is a spring with a metal blade, formed by a central part forming the contact portion 10 in the sense of the invention, capable of being pressed against the heat exchanger, and end portions disposed on either side of this central portion.
  • the central portion forming the contact portion 10 of this metal leaf spring is flat and regular and its ends 14, intended to be arranged in contact with the wall of the housing 1, are curved. The curved shape of the ends makes it possible to generate the elastic restoring force when the battery via the heat exchanger presses and forces the spring.
  • Figures 3 to 5 illustrate three variants of the first embodiment of the present invention. These three variants differ from each other essentially by the structure of the elastic return members 50 forming the compression means 5.
  • the heat exchangers 4 of the cooling devices 3 according to these variants have, for their part, similar structures, in that they extend mainly along the longitudinal axis X and have conduits 13 arranged one after the other, along the stacking direction D previously described.
  • the cooling device 3 comprises two heat exchangers 4 for a single resilient return member 50.
  • the elastic return member 50 thus comprises two contact portions 10, interconnected by a stall 18, and respectively configured to form a contact surface with one of these heat exchangers 4.
  • the two contact portions 10 extend over the whole, or at least 90%, of a longitudinal dimension and / or transverse of the second wall 9 of the heat exchanger disposed opposite this contact portion.
  • the elastic return member 50 is a spring of synthetic material whose ends 14 are straight.
  • two branches 19 emerge from a central portion of the contact portion 10 and extend in a direction away from one another. The free ends of these branches 19 form the ends 14 of the elastic return member 50 intended to be arranged in contact with the wall of the housing.
  • the contact between each heat exchanger 4 and each contact portion 10 of the corresponding compression means 5 is continuous, between at least two end edges. opposed, so as to distribute the best compression force on the heat exchanger, and it is further direct, with the heat exchanger directly in contact with the compression means.
  • the contact between each heat exchanger 4 and each contact portion 10 of the corresponding compression means 5 remains continuous, between at least two opposite end edges, so as to distribute the best compression force on the heat exchanger, but this time is indirect, with an intermediate material 20 which is interposed between the contact portion 10 and the second wall 9 of the heat exchanger 4.
  • the intermediate material 20 is in contact with the second wall 9 of the heat exchanger 4 on the one hand and with the contact portion 10 of the compression means 5 on the other hand.
  • the intermediate material 20 extends at least from the first transverse end edge 211 to the second transverse end edge 212 of the second wall 9 and the contact between this second wall 9 and the intermediate material 20 is continuous between these two edges. transverse end 211, 212.
  • the intermediate material 20 may for example be an adhesive material.
  • this intermediate material 20 is in particular facilitated by the dimensions of the contact surface formed between the heat exchanger 4 and the contact portion 10 of the compression means 5.
  • the dimension of this contact surface allows to spread the intermediate material 20 and thus facilitate its grip between the heat exchanger and the compression means. It is thus possible to improve the mechanical strength of the cooling device 3, or to provide an electrical, thermal, or chemical discontinuity between the compression means 5 and the heat exchanger 4.
  • Figures 6 to 8 are perspective views of the cooling device 3 according to three variants of a second embodiment of the present invention.
  • the compression means 5 is a massive element 51.
  • the term "solid element” is understood to mean, in particular, an element having the shape of a block, the outer envelope of which has substantially the shape of a rectangular parallelepiped.
  • This solid element 51 may for example be formed with crosslinked rubber, such as EPDM (ethylene-propylene-diene monomer), or with a flexible plastic material.
  • the solid element 51 has a first side 21 and a second side 22, opposite this first side 21.
  • the first side 21 is intended to be placed in contact with the second wall 9 of the heat exchanger 4 and thus defines the contact portion 10.
  • the solid element 51 extends, as before, between two transverse end edges 211, 212 opposite the second wall 9 of the heat exchanger 4 and also between two opposite longitudinal end edges 111, 112 of this second wall 9.
  • the contact portion 10 thus covers integrally the second wall 9 of the heat exchanger 4.
  • the second side 22 of this massive element 51 is for its part arranged to be in contact with the wall of the housing comprising the battery to be cooled.
  • the first side 21 and the second side 22 of the solid element has smooth and regular surfaces.
  • Such a regular structure may in particular allow insertion between the solid element 51 and the heat exchanger of a layer of an intermediate material as described above in a variant of the first embodiment.
  • the first side 21 of the solid element 51 has a plurality of pins 23 while the second side 22 has a smooth surface.
  • the outer envelope of the compression means remains unchanged so that the compression means remains a massive element in the sense of what has been heard previously.
  • This plurality of pins 23 defines a plane forming the contact portion 10 which extends over the whole of the second wall 9 of the heat exchanger 4, thus ensuring a homogeneous distribution of the elastic return force applied to this heat exchanger 4 by the compression means 5. It is further understood that the contact surface between the compression means 5 and the second wall 9 of the heat exchanger thus formed is discontinuous.
  • the solid element 51 has a honeycomb structure 24, honeycomb. These cells define a plane forming the contact portion 10 which extends, as previously, over the entire second wall 9 of the heat exchanger 4.
  • the contact surface formed between the means of compression 5 and the second wall 9 of the heat exchanger is discontinuous.
  • the present invention therefore proposes a device for cooling a battery for a motor vehicle comprising a compression means configured to exert a resilient restoring force on at least one heat exchanger in order to press the heat exchanger against a face of the battery to be cooled.
  • the cooling device comprises only two components, easily assembled together.
  • the invention can not be limited to the means and configurations described and illustrated here, and it also extends to any equivalent means or configurations and any technically operating combination of such means.
  • the shapes and arrangement of the compression means can be modified without harming the invention, insofar as they fulfill the functionalities described herein, and in particular that this compression means exerts an elastic restoring force. distributed homogeneously on a wall of the heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention relates to a cooling device (3) for a motor vehicle battery (2), comprising at least one heat exchanger (4) having a first wall (8) intended to be pressed against the battery (2) and a second wall (9) opposite the first wall (8), the cooling device (3) further comprising a compression means (5) configured to press the at least one heat exchanger (4) against the battery (2), said compression means (5) having at least one contact portion (10) intended to be disposed in contact with the second wall (9) of the at least one heat exchanger (4). According to the invention, the contact portion (10) of the compression means (5) extends from a first edge (11) of the second wall (9) of the at least one heat exchanger (4) to a second edge (12) opposite said second wall (9).

Description

DISPOSITIF DE REFROIDISSEMENT POUR UNE BATTERIE DE  COOLING DEVICE FOR A BATTERY
VEHICULE AUTOMOBILE  MOTOR VEHICLE
L'invention a trait au domaine des dispositifs de refroidissement pour véhicule automobile et plus particulièrement des dispositifs de refroidissement pour des batteries de véhicule automobile, notamment de véhicule hybride ou électrique. The invention relates to the field of cooling devices for a motor vehicle and more particularly to cooling devices for motor vehicle batteries, in particular hybrid or electric vehicles.
Les nouvelles motorisations électriques des véhicules automobiles font appel à des batteries de plus en plus puissantes qu'il est nécessaire de thermo- réguler, notamment de refroidir. Classiquement ces batteries sont agencées dans un boîtier de support et il est connu de disposer, entre ces batteries et une paroi de ce boîtier, des échangeurs thermiques dans lesquels circule un fluide de refroidissement. Ce fluide de refroidissement permet de récupérer des calories dégagées par les batteries en fonctionnement et d'assurer ainsi un transfert de chaleur entre la batterie et les échangeurs thermiques afin de refroidir ces batteries après ou au cours de leur fonctionnement. The new powertrains of motor vehicles use more and more powerful batteries that it is necessary to thermoregulate, especially to cool. Conventionally these batteries are arranged in a support housing and it is known to have, between these batteries and a wall of this housing, heat exchangers in which circulates a cooling fluid. This cooling fluid makes it possible to recover the calories released by the batteries in operation and thus to ensure a transfer of heat between the battery and the heat exchangers in order to cool these batteries after or during their operation.
Afin d'assurer un refroidissement optimal de ces batteries, les échangeurs thermiques doivent être agencés au contact de ces batteries, dans le boîtier de support. Le dimensionnement de ces échangeurs thermiques doit ainsi leur permettre d'être logés entre la paroi du boîtier de support et une face des batteries à refroidir, tout en étant disposés au contact de ces batteries. In order to ensure optimum cooling of these batteries, the heat exchangers must be arranged in contact with these batteries in the support housing. The dimensioning of these heat exchangers must thus allow them to be housed between the wall of the support housing and a face of the batteries to be cooled, while being arranged in contact with these batteries.
De manière connue, ces échangeurs thermiques comportent chacun un corps tubulaire formant un ou plusieurs tubes pour la circulation d'un fluide réfrigérant. Chacun de ces corps tubulaires présente une première surface plane par exemple tournée vers la paroi de fond du boîtier support, et une deuxième surface plane disposée au contact des batteries. On comprend qu'il importe que les échangeurs thermiques soient disposés au plus près des batteries, et avantageusement au contact de celles-ci, pour que le transfert de chaleur soit optimal. Mais l'existence de jeux, aussi bien de montage que de fabrication, peut faire que le contact entre les tubes de ces échangeurs thermiques et les batteries à refroidir n'est pas assuré, au moins partiellement. In known manner, these heat exchangers each comprise a tubular body forming one or more tubes for the circulation of a refrigerant. Each of these tubular bodies has a first flat surface, for example facing the bottom wall of the support housing, and a second flat surface disposed in contact with the batteries. It is understood that it is important that the heat exchangers are disposed closer to the batteries, and advantageously in contact with them, so that the heat transfer is optimal. But the existence of games, both assembly and manufacturing, may cause the contact between the tubes of these heat exchangers and the batteries to be cooled is not assured, at least partially.
Pour pallier cet inconvénient, des moyens de rappel élastiques peuvent être mis en œuvre afin de plaquer ces échangeurs thermiques contre les batteries du boîtier de support. On connaît ainsi des dispositifs de refroidissement qui comprennent un échangeur thermique, un élément formant ressort et une pièce intermédiaire formant d'une part support pour l'échangeur thermique et d'autre part support pour le ressort. Cette pièce intermédiaire peut notamment comporter une première partie de support de l'échangeur, qui présente une surface plane servant de support à l'échangeur thermique, et une deuxième partie permettant la tenue du ressort. Le ressort peut être rapporté contre cette pièce intermédiaire ou bien être formé par une portion élastique de cette pièce intermédiaire et prendre appui sur la paroi du boîtier qui s'étend à l'opposé de la batterie par rapport à ce ressort. Dans un agencement vertical classique, le ressort est ainsi en appui sur la paroi de fond du boîtier, à savoir celle la plus proche du sol. To overcome this drawback, resilient return means can be implemented to press these heat exchangers against the batteries of the support housing. Cooling devices are thus known which comprise a heat exchanger, a spring element and an intermediate part forming, on the one hand, a support for the heat exchanger and, on the other hand, a support for the spring. This intermediate piece may include in particular a first support portion of the exchanger, which has a flat surface serving as a support for the heat exchanger, and a second portion for holding the spring. The spring may be fitted against this intermediate piece or be formed by an elastic portion of this intermediate piece and bear against the wall of the housing which extends opposite the battery relative to this spring. In a conventional vertical arrangement, the spring is thus supported on the bottom wall of the housing, namely that closest to the ground.
Une telle conception implique une fabrication complexe d'une pièce intermédiaire ainsi qu'un assemblage fastidieux de chacun des composants de ces dispositifs de refroidissement. Such a design involves complex manufacture of an intermediate part and a tedious assembly of each of the components of these cooling devices.
La présente invention s'inscrit dans ce contexte et vise à proposer un dispositif de refroidissement pour batteries de véhicule automobile, qui soit notamment plus simple à produire et à assembler. The present invention is in this context and aims to provide a cooling device for motor vehicle batteries, which is particularly easier to produce and assemble.
L'objet de la présente invention concerne ainsi un dispositif de refroidissement d'une batterie d'un véhicule automobile, comprenant au moins un échangeur thermique présentant une première paroi destinée à être plaquée contre la batterie et une deuxième paroi opposée à la première paroi, le dispositif de refroidissement comprenant en outre un moyen de compression configuré pour plaquer l'au moins un échangeur thermique contre la batterie, ce moyen de compression présentant au moins une portion de contact destinée à être disposée au contact de la deuxième paroi de l'au moins un échangeur thermique. Selon la présente invention, la portion de contact du moyen de compression s'étend d'un premier bord de la deuxième paroi de l'au moins un échangeur thermique à un deuxième bord opposé de cette deuxième paroi. Le moyen de compression est configuré pour exercer une force de rappel élastique dirigée vers l'au moins un échangeur thermique, cette force de rappel élastique permettant de plaquer cet au moins un échangeur thermique contre la batterie à refroidir. The object of the present invention thus relates to a device for cooling a battery of a motor vehicle, comprising at least a heat exchanger having a first wall intended to be pressed against the battery and a second wall opposite the first wall, the cooling device further comprising a compression means configured to press the at least one heat exchanger against the battery, this compression means having at least one contact portion intended to be disposed in contact with the second wall of the at least one heat exchanger. According to the present invention, the contact portion of the compression means extends from a first edge of the second wall of the at least one heat exchanger to a second opposite edge of the second wall. The compression means is configured to exert an elastic restoring force directed towards the at least one heat exchanger, this elastic restoring force making it possible to press this at least one heat exchanger against the battery to be cooled.
L'au moins un échangeur thermique du dispositif de refroidissement selon la présente invention s'étend principalement selon un axe longitudinal et présente une série de conduits longitudinaux configurés pour permettre la circulation d'un fluide réfrigérant. Cette série de conduits longitudinaux est formée par un empilement des conduits selon une direction d'empilement transversale par rapport à l'axe longitudinal. Selon un exemple de réalisation de la présente invention, la portion de contact du moyen de compression s'étend depuis un premier bord d'extrémité longitudinale de la deuxième paroi de l'échangeur thermique, jusqu'à un deuxième bord d'extrémité longitudinale de cette deuxième paroi. On comprend que le premier bord d'extrémité longitudinale est ainsi opposé au deuxième bord d'extrémité longitudinale, le long de l'axe longitudinal selon lequel s'étend principalement l'échangeur thermique. En d'autres termes, le moyen de compression, au niveau de sa portion de contact, s'étend sur toute la dimension longitudinale de l'échangeur thermique. On comprendra que cette caractéristique est atteinte dès lors que le moyen de compression couvre au moins 90% de cette dimension. The at least one heat exchanger of the cooling device according to the present invention extends mainly along a longitudinal axis and has a series of longitudinal ducts configured to allow the circulation of a cooling fluid. This series of longitudinal ducts is formed by a stack of conduits in a direction of stacking transverse to the longitudinal axis. According to an exemplary embodiment of the present invention, the contact portion of the compression means extends from a first longitudinal end edge of the second wall of the heat exchanger, to a second longitudinal end edge of this second wall. It will be understood that the first longitudinal end edge is thus opposite to the second longitudinal end edge, along the longitudinal axis along which the heat exchanger mainly extends. In other words, the compression means, at its contact portion, extends over the entire longitudinal dimension of the heat exchanger. It will be understood that this characteristic is reached when the compression means covers at least 90% of this dimension.
Selon un autre exemple de réalisation de la présente invention, la portion de contact du moyen de compression s'étend depuis un premier bord d'extrémité transversale de la deuxième paroi de l'échangeur thermique, jusqu'à un deuxième bord d'extrémité transversale de cette deuxième paroi. On comprend que le premier bord d'extrémité transversale est ainsi opposé au deuxième bord d'extrémité transversale, le long de la direction d'empilement transversale des conduits de l'échangeur thermique. En d'autres termes, le moyen de compression, au niveau de sa portion de contact, s'étend sur toute la dimension transversale de l'échangeur thermique. On comprendra que cette caractéristique est atteinte dès lors que le moyen de compression couvre au moins 90% de cette dimension. According to another embodiment of the present invention, the contact portion of the compression means extends from a first transverse end edge of the second wall of the heat exchanger to a second transverse end edge. of this second wall. It is understood that the first transverse end edge is thus opposite to the second transverse end edge, along the transverse stacking direction of the heat exchanger ducts. In other words, the compression means, at its contact portion, extends over the entire transverse dimension of the heat exchanger. It will be understood that this characteristic is achieved when the compression means covers at least 90% of this dimension.
Selon encore un autre exemple de réalisation de la présente invention, la portion de contact du moyen de compression s'étend sur l'ensemble de la deuxième paroi, à la fois entre les bords longitudinaux et entre les bords transversaux de la deuxième paroi de l'échangeur thermique. En d'autres termes, la portion de contact du moyen de compression recouvre complètement la deuxième paroi de l'échangeur thermique. Là encore, on peut considérer que cette caractéristique est atteinte dès lors que le moyen de compression couvre au moins 90% de la surface totale de la deuxième paroi. According to yet another embodiment of the present invention, the contact portion of the compression means extends over the whole of the second wall, both between the longitudinal edges and between the transverse edges of the second wall of the second wall. 'heat exchanger. In other words, the contact portion of the compression means completely covers the second wall of the heat exchanger. Again, it can be considered that this characteristic is reached when the compression means covers at least 90% of the total surface of the second wall.
Selon une caractéristique de la présente invention, la portion de contact du moyen de compression est en contact avec la deuxième paroi de l'au moins un échangeur thermique, tout le long de cette deuxième paroi entre deux bords opposés. En d'autres termes, le moyen de compression est configuré de sorte que la portion de contact est en contact avec l'échangeur thermique d'un bord à l'autre de celui-ci, sans qu'il n'y ait de zones de discontinuité dans ce contact entre les deux composants. On comprend donc qu'on crée ainsi une surface de contact importante entre le moyen de compression et l'échangeur thermique, qui permet une répartition homogène de la force de rappel élastique exercée par le moyen de compression sur l'échangeur thermique, cette répartition homogène étant ainsi moins traumatisante pour l'échangeur thermique qu'une force de rappel élastique qui serait exercée ponctuellement sur cet échangeur thermique. According to a feature of the present invention, the contact portion of the compression means is in contact with the second wall of the at least one heat exchanger, all along the second wall between two opposite edges. In other words, the compression means is configured so that the contact portion is in contact with the heat exchanger from one edge to the other of the latter, without there being zones. of discontinuity in this contact between the two components. It is thus understood that a large contact surface is thus created between the compression means and the heat exchanger, which allows a homogeneous distribution of the elastic restoring force exerted by the compression means on the heat exchanger, this homogeneous distribution thus being less traumatic for the heat exchanger than an elastic restoring force that would be exerted punctually on this heat exchanger.
Selon un premier mode de réalisation de la présente invention, le moyen de compression est un organe de rappel élastique. According to a first embodiment of the present invention, the compression means is an elastic return member.
Cet organe de rappel élastique peut par exemple être un ressort à lames métalliques ou bien un ressort en matière synthétique. Outre l'au moins une portion de contact, l'organe de rappel élastique comprend deux extrémités destinées à être disposées au contact d'une paroi d'un boîtier de support d'une batterie. This elastic return member may for example be a leaf spring or a spring of synthetic material. In addition to the at least one contact portion, the elastic return member comprises two ends intended to be arranged in contact with a wall of a battery support case.
Selon une caractéristique de la présente invention, l'organe de rappel élastique peut comprendre deux portions de contact respectivement en contact avec un échangeur thermique, un décrochage étant réalisé entre ces portions de contact. According to a feature of the present invention, the elastic return member may comprise two contact portions respectively in contact with a heat exchanger, a stall being formed between these contact portions.
Selon cette caractéristique, on comprend donc que le dispositif de refroidissement selon la présente invention peut comprendre deux échangeurs thermiques et un unique moyen de compression, cet unique moyen de compression étant alors configuré pour plaquer simultanément les deux échangeurs thermiques contre la batterie à refroidir. Le dispositif de refroidissement présente ainsi un encombrement moindre par rapport à une situation dans laquelle il faudrait disposer deux dispositifs de refroidissement distincts pour pouvoir plaquer deux échangeurs thermiques contre ladite batterie. On comprend que conformément à ce qui a été présenté précédemment, l'organe de rappel élastique est dans ce cas configuré pour s'étendre d'un bord à l'autre de chacun des échangeurs thermiques, le décrochage étant formé dans une zone où l'organe de rappel élastique n'est pas au contact avec ces échangeurs thermiques. According to this characteristic, it is therefore understood that the cooling device according to the present invention can comprise two heat exchangers and a single compression means, this single compression means then being configured to simultaneously press the two heat exchangers against the battery to be cooled. The cooling device thus has a smaller footprint compared to a situation in which it would be necessary to have two separate cooling devices to be able to press two heat exchangers against said battery. It is understood that in accordance with what has been presented previously, the elastic return member is in this case configured to extend from one edge to the other of each of the heat exchangers, the stall being formed in an area where the elastic return member is not in contact with these heat exchangers.
Selon une variante du premier mode de réalisation de la présente invention, un matériau intermédiaire est interposé entre la portion de contact du moyen de compression et la deuxième paroi de l'échangeur thermique. According to a variant of the first embodiment of the present invention, an intermediate material is interposed between the contact portion of the compression means and the second wall of the heat exchanger.
Selon cette variante, on comprend alors que le contact entre la portion de contact du moyen de compression et la deuxième paroi de l'échangeur thermique est indirect. According to this variant, it is then understood that the contact between the contact portion of the compression means and the second wall of the heat exchanger is indirect.
L'interposition de ce matériau intermédiaire est notamment facilitée, et utile, du fait de la taille de la surface de contact entre le moyen de compression et l'échangeur thermique. En effet, cette surface de contact forme une zone de support de ce matériau intermédiaire, qui peut par exemple être un matériau adhésif. The interposition of this intermediate material is particularly facilitated, and useful, because of the size of the contact surface between the compression means and the heat exchanger. Indeed, this contact surface forms a support zone of this intermediate material, which may for example be an adhesive material.
Selon un deuxième mode de réalisation de la présente invention, le moyen de compression est un élément massif. According to a second embodiment of the present invention, the compression means is a massive element.
Par exemple, l'élément massif peut être un caoutchouc réticulé ou en un plastique souple. Le choix du type de matériau pour la réalisation de cet élément massif pourra par exemple dépendre, au moins en partie, de la structure du moyen de compression. L'élément massif selon ce deuxième mode de réalisation comprend au moins une portion de contact réalisée par un premier côté de cet élément massif. L'élément massif présente également un deuxième côté, opposé au premier côté, destiné à être disposé au contact d'une paroi d'un boîtier de support d'une batterie. For example, the solid member may be a cross-linked rubber or a soft plastic. The choice of the type of material for the realization of this massive element may for example depend, at least in part, on the structure of the compression means. The solid element according to this second embodiment comprises at least one contact portion made by a first side of this solid element. The solid element also has a second side, opposite the first side, intended to be disposed in contact with a wall of a battery holder housing.
On comprend que l'élément massif comprend autant de portion de contact que le dispositif de refroidissement comprend d'échangeurs thermiques, chaque échangeur thermique étant disposé au contact de l'une de ces portions de contact. It is understood that the solid element comprises as much contact portion as the cooling device comprises heat exchangers, each heat exchanger being disposed in contact with one of these contact portions.
Selon une variante de ce deuxième mode de réalisation, la portion de contact de l'élément massif présente une pluralité de picots. Selon cette variante, la pluralité de picots est ménagée sur le premier côté de l'élément massif et les extrémités libres de ces picots participent à former la surface de contact avec le ou les échangeurs thermiques, le deuxième côté présentant une surface lisse et régulière. According to a variant of this second embodiment, the contact portion of the solid element has a plurality of pins. According to this variant, the plurality of pins is formed on the first side of the solid element and the free ends of these pins participate in forming the contact surface with the heat exchanger or heat exchangers, the second side having a smooth and regular surface.
Selon une autre variante du deuxième mode de réalisation de l'invention, l'élément massif présente une structure alvéolée. On entend par « structure alvéolée » une structure de type nid d'abeille. Selon cette autre variante de réalisation, le premier côté et le deuxième côté de l'élément massif sont symétriques, les alvéoles étant configurées pour traverser d'un côté à l'autre l'élément massif formant le moyen de compression. Le moyen de compression, et la portion de contact avec l'échangeur thermique qu'il participe à définir, peut présenter une pluralité d'alvéoles. According to another variant of the second embodiment of the invention, the solid element has a honeycomb structure. The term "honeycomb structure" means a structure of honeycomb type. According to this alternative embodiment, the first side and the second side of the solid element are symmetrical, the cells being configured to pass from one side to the other the solid element forming the compression means. The compression means, and the contact portion with the heat exchanger that it participates to define, may have a plurality of cells.
La présente invention concerne également un boîtier de support d'au moins une batterie comprenant au moins une batterie et au moins un dispositif de refroidissement selon la présente invention. Selon une caractéristique de la présente invention, le dispositif de refroidissement est disposé entre une paroi du boîtier et une face de la batterie. The present invention also relates to a support housing of at least one battery comprising at least one battery and at least one cooling device according to the present invention. According to a feature of the present invention, the cooling device is disposed between a wall of the housing and a face of the battery.
Avantageusement, le dispositif de refroidissement peut être disposé entre une paroi de fond du boîtier et une face inférieure de la batterie, dans un agencement vertical des composants à l'intérieur du boîtier de support de batterie. Ainsi, le poids de la batterie et le poids de l'échangeur thermique s'exercent sur le moyen de compression du dispositif de refroidissement et tendent à le déplacer vers la paroi de fond du boîtier. Le moyen de compression est alors configuré pour reprendre sa position d'origine, ou à tout le moins pour tenter de reprendre cette position d'origine, exerçant dès lors une force de rappel élastique dirigée vers le haut et vers la batterie et permettant de plaquer l'échangeur thermique contre cette batterie. D'autres caractéristiques, détails et avantages de la présente invention ressortiront plus clairement à la lecture de la description détaillée donnée ci- après à titre indicatif, en relation avec les différents modes de réalisation illustrés sur les figures suivantes : Advantageously, the cooling device may be disposed between a bottom wall of the housing and a lower face of the battery, in a vertical arrangement of the components inside the battery support housing. Thus, the weight of the battery and the weight of the heat exchanger are exerted on the compression means of the cooling device and tend to move it towards the bottom wall of the housing. The means of compression is then configured to resume its original position, or at least to attempt to resume this original position, thereby exerting an elastic return force directed upwardly and towards the battery and allowing to heat the heat exchanger against this battery. Other features, details and advantages of the present invention will emerge more clearly on reading the detailed description given below as an indication, in relation to the various embodiments illustrated in the following figures:
-la figure ι est une représentation schématique d'un boîtier de support d'au moins une batterie comprenant, outre la batterie, au moins un dispositif de refroidissement selon un premier mode de réalisation de la présente invention ; FIG. 1 is a diagrammatic representation of a support case for at least one battery comprising, in addition to the battery, at least one cooling device according to a first embodiment of the present invention;
-la figure 2 est une représentation schématique partielle, vue en perspective, du dispositif de refroidissement selon le premier mode de réalisation de la présente invention ; -les figures 3 à 5 sont des représentations schématiques de différentes variantes du dispositif de refroidissement selon le premier mode de réalisation de la présente invention ; FIG. 2 is a partial diagrammatic representation, in perspective view, of the cooling device according to the first embodiment of the present invention; FIGS. 3 to 5 are diagrammatic representations of different variants of the cooling device according to the first embodiment of the present invention;
-les figures 6 à 8 sont des vues en perspective du dispositif de refroidissement selon différentes variantes d'un deuxième mode de réalisation de la présente invention. FIGS. 6 to 8 are perspective views of the cooling device according to different variants of a second embodiment of the present invention.
La figure 1 représente un boîtier 1 de support d'au moins une batterie 2. Outre la batterie 2, ce boîtier 1 comprend au moins un dispositif de refroidissement 3 selon un premier mode de réalisation de la présente invention. En l'espèce, deux dispositifs de refroidissement 3 identiques sont représentés. Chacun de ces dispositifs de refroidissement 3 comprend au moins un échangeur thermique 4 et un moyen de compression 5. Tel qu'illustré sur la figure i, ces dispositifs de refroidissement 3 sont disposés entre une face 6 de la batterie 2 et une paroi 7 du boîtier de support 1. FIG. 1 shows a housing 1 for supporting at least one battery 2. In addition to the battery 2, this housing 1 comprises at least one cooling device 3 according to a first embodiment of the present invention. In this case, two identical cooling devices 3 are shown. Each of these cooling devices 3 comprises at least one heat exchanger 4 and a compression means 5. As illustrated on FIG. Figure i, these cooling devices 3 are arranged between a face 6 of the battery 2 and a wall 7 of the support housing 1.
Chaque échangeur thermique 4 comprend une première paroi 8 destinée à être plaquée contre la face 6 de la batterie 2 et une deuxième paroi 9, opposée à la première paroi 8, destinée à être disposée au contact du moyen de compression 5, et plus précisément au contact d'une portion de contact 10 de ce moyen de compression 5. Each heat exchanger 4 comprises a first wall 8 intended to be pressed against the face 6 of the battery 2 and a second wall 9, opposite the first wall 8, intended to be arranged in contact with the compression means 5, and more specifically to the contact of a contact portion 10 of this compression means 5.
Une série de conduits 13 est également ménagée dans chaque échangeur thermique 4, chacun de ces conduits 13 étant configuré pour permettre la circulation d'un fluide réfrigérant destiné à capter des calories émises par la batterie 2 lorsqu'elle est en fonctionnement. L'agencement de ces conduits 13 sera plus amplement détaillé dans la suite de la description. A series of ducts 13 is also provided in each heat exchanger 4, each of these ducts 13 being configured to allow the circulation of a refrigerant for capturing the calories emitted by the battery 2 when it is in operation. The arrangement of these conduits 13 will be more fully detailed in the following description.
Le moyen de compression 5 est ainsi en contact à la fois avec la deuxième paroi 9 de l'échangeur thermique 4 et avec la paroi 7 du boîtier 1. Ce moyen de compression 5 est configuré pour exercer une force de rappel élastique F dirigée vers la batterie 2 et permettant de plaquer l'échangeur thermique 4, et plus particulièrement la première paroi 8 de cet échangeur thermique 4, contre la batterie 2 à refroidir. The compression means 5 is thus in contact both with the second wall 9 of the heat exchanger 4 and with the wall 7 of the casing 1. This compression means 5 is configured to exert an elastic return force F directed towards the battery 2 and for pressing the heat exchanger 4, and more particularly the first wall 8 of the heat exchanger 4, against the battery 2 to be cooled.
Selon un agencement représenté sur la figure 1, le dispositif de refroidissement 3 peut être disposé entre une face inférieure 6 de la batterie 2 et une paroi de fond 7 du boîtier 1. Selon cet agencement, la batterie 2, l'échangeur thermique 4, le moyen de compression 5 et la paroi 7 de fond du boîtier 1 sont ainsi empilés selon une direction verticale lorsqu'ils sont en position montée sur le châssis du véhicule automobile. Notamment sous l'effet du poids de la batterie, on comprend que l'échangeur thermique 4 appuie contre la portion de contact 10 du moyen de compression 5 et tend à le déplacer vers la paroi de fond 7 du boîtier de support 1. Le moyen de compression 5 étant disposé au contact de cette paroi de fond 7, il tend à reprendre sa position d'origine et à pousser l'échangeur thermique 4 à distance de ladite paroi de fond 7, vers la batterie 2. Dans ce contexte, lorsque l'effort de poussée initiale est plus important, du fait du poids de la batterie 2 appuyant sur l'échangeur thermique 4, l'effort de rappel est plus important en retour et tend à plaquer fortement l'échangeur thermique 4 contre la batterie 2. According to an arrangement shown in FIG. 1, the cooling device 3 can be arranged between a lower face 6 of the battery 2 and a bottom wall 7 of the housing 1. According to this arrangement, the battery 2, the heat exchanger 4, the compression means 5 and the bottom wall 7 of the housing 1 are thus stacked in a vertical direction when in the mounted position on the chassis of the motor vehicle. In particular, under the effect of the weight of the battery, it is understood that the heat exchanger 4 bears against the contact portion 10 of the compression means 5 and tends to move it towards the bottom wall 7 of the support housing 1. The means 5 being disposed in contact with this bottom wall 7, it tends to resume its original position and to push the heat exchanger 4 away from said bottom wall 7, to the battery 2. In this context, when the initial thrust force is greater, because of the weight of the battery 2 pressing on the heat exchanger 4, the return force is greater in return and tends to strongly press the heat exchanger 4 against the battery 2.
Quelle que soit la position finale des composants dans le boîtier de support de batterie 1 monté sur le véhicule, la force de rappel élastique F permet de plaquer la première paroi 8 de l'échangeur thermique 4 contre la face inférieure 6 de la batterie 2 à refroidir, permettant alors la captation, par le fluide de refroidissement circulant dans les conduits 13 de cet échangeur thermique 4, des calories émises par la batterie 2 lors de son fonctionnement. Regardless of the final position of the components in the battery support case 1 mounted on the vehicle, the elastic restoring force F makes it possible to press the first wall 8 of the heat exchanger 4 against the lower face 6 of the battery 2. cool, then allowing the capture, by the cooling fluid flowing in the conduits 13 of the heat exchanger 4, the calories emitted by the battery 2 during its operation.
Selon un aspect de l'invention, il est notable que la portion de contact 10 du moyen de compression 5 s'étend sur une grande surface de l'échangeur thermique, et avantageusement sur la totalité de la deuxième paroi 9 de l'échangeur thermique 4, pour répartir au mieux les efforts générés par le moyen de compression sur l'échangeur thermique. Le moyen de compression est ainsi configuré pour être au contact de l'échangeur thermique depuis un premier bordAccording to one aspect of the invention, it is notable that the contact portion 10 of the compression means 5 extends over a large surface of the heat exchanger, and advantageously over the entire second wall 9 of the heat exchanger 4, to distribute the best efforts generated by the compression means on the heat exchanger. The compression means is thus configured to be in contact with the heat exchanger from a first edge
11 de la deuxième paroi 9 de l'échangeur thermique 4 jusqu'à un deuxième bord11 of the second wall 9 of the heat exchanger 4 to a second edge
12 de cette deuxième paroi 9, opposé au premier bord 12. Selon un premier mode de réalisation par exemple représenté sur les figures 1 à 4, le moyen de compression 5 est un organe de rappel élastique 50 et présente, outre la portion de contact 10, deux extrémités 14 destinées à être disposées au contact de la paroi 7 du boîtier de support 1. 12 of this second wall 9, opposite to the first edge 12. According to a first embodiment, for example represented in FIGS. 1 to 4, the compression means 5 is an elastic return member 50 and has, in addition to the contact portion 10 two ends 14 intended to be arranged in contact with the wall 7 of the support housing 1.
En référence dans un premier temps à la figure 2, nous allons maintenant décrire plus en détails le dispositif de refroidissement 3 selon le premier mode de réalisation de la présente invention. Referring firstly to Figure 2, we will now describe in more detail the cooling device 3 according to the first embodiment of the present invention.
L'échangeur thermique 4 de ce dispositif de refroidissement 3 s'étend principalement selon un axe longitudinal X. Tel que précédemment décrit, une série de conduits 13 est ménagée dans cet échangeur thermique 4 pour permettre la circulation du fluide réfrigérant. Cette série de conduits 13 est réalisée le long d'une direction d'empilement D transversale par rapport à l'axe longitudinal X. Autrement dit, les conduits 13 sont empilés les uns sur les autres le long de cette direction d'empilement D, chaque conduit 13 s'étendant selon un axe parallèle à l'axe longitudinal X. The heat exchanger 4 of this cooling device 3 extends mainly along a longitudinal axis X. As previously described, a series of ducts 13 is formed in this heat exchanger 4 to allow the circulation of the refrigerant. This series of ducts 13 is made along a stacking direction D transverse to the longitudinal axis X. In other words, the ducts 13 are stacked on each other along this stacking direction D, each duct 13 extending along an axis parallel to the longitudinal axis X.
Selon un plan de coupe perpendiculaire à un plan dans lequel s'inscrivent l'axe longitudinal X et la direction d'empilement D, l'échangeur thermique 4 présente une forme rectangulaire qui comprend une première grande face assimilable à la première paroi 8 et une deuxième grande face assimilable à la deuxième paroi 9. La première paroi 8 et la deuxième paroi 9 sont sensiblement symétriques l'une par rapport à l'autre et sont reliées entre elles à leurs extrémités transversales par deux parois de liaison 15, de forme arrondie notamment pour des raisons dues au procédé de fabrication de l'échangeur thermique 4. According to a sectional plane perpendicular to a plane in which the longitudinal axis X and the stacking direction D are inscribed, the heat exchanger 4 has a rectangular shape which comprises a first large face comparable to the first wall 8 and a second major face assimilable to the second wall 9. The first wall 8 and the second wall 9 are substantially symmetrical with respect to each other and are interconnected at their transverse ends by two connecting walls 15, of rounded shape especially for reasons due to the manufacturing process of the heat exchanger 4.
Chacune de ces parois 8, 9 présente, dans le plan de coupe défini ci-dessus, deux bords d'extrémité transversale 211, 212. Ainsi, chacune de ces parois 8, 9 comprend un premier bord d'extrémité transversale 211 et un deuxième bord d'extrémité transversale 212, ce premier bord d'extrémité transversale 211 et ce deuxième bord d'extrémité transversale 212 étant opposés l'un à l'autre par rapport à la direction d'empilement D. Each of these walls 8, 9 has, in the section plane defined above, two transverse end edges 211, 212. Thus, each of these walls 8, 9 comprises a first transverse end edge 211 and a second transverse end edge 212, this first transverse end edge 211 and this second transverse end edge 212 being opposite to each other with respect to the stacking direction D.
Chacune de ces parois 8, 9 présente en outre deux bords d'extrémité longitudinale 111, 112. Autrement dit, chacune de ces parois 8, 9 comprend également un premier bord d'extrémité longitudinale 111 et un deuxième bord d'extrémité longitudinale 112, ce premier bord d'extrémité longitudinale 111 et ce deuxième bord d'extrémité longitudinale 112 étant opposés l'un à l'autre par rapport à l'axe longitudinal X. Each of these walls 8, 9 furthermore has two longitudinal end edges 111, 112. In other words, each of these walls 8, 9 also comprises a first longitudinal end edge 111 and a second longitudinal end edge 112. this first longitudinal end edge 111 and this second longitudinal end edge 112 being opposite to each other with respect to the longitudinal axis X.
On comprend que les bords d'extrémité transversale 211, 212 s'étendent le long d'axes parallèles à l'axe longitudinal X et que les bords d'extrémité longitudinale m, 112 s'étendent quant à eux selon des directions parallèles à la direction d'empilement D des conduits 13. It will be understood that the transverse end edges 211, 212 extend along axes parallel to the longitudinal axis X and that the end edges longitudinally m, 112 extend in their directions parallel to the stacking direction D of the ducts 13.
Comme on peut le voir sur la figure 2, les parois de liaison 15 relient les bords d'extrémités transversales 211, 212 de chacune des parois 8, 9 de l'échangeur thermique 4. As can be seen in FIG. 2, the connecting walls 15 connect the transverse end edges 211, 212 of each of the walls 8, 9 of the heat exchanger 4.
Tel que précédemment décrit, la portion de contact 10 du moyen de compression 5 s'étend entre au moins deux bords d'extrémité opposés de la deuxième paroi 9 de l'échangeur thermique 4. Selon le premier mode de réalisation illustré sur la figure 2, cette portion de contact 10 s'étend ainsi au moins entre deux bords d'extrémité transversale 211, 212 de cette deuxième paroi 9. De plus, on remarque que le contact entre cette portion de contact 10 et la deuxième paroi 9 est direct et continu, tout le long de la direction d'empilement D, entre deux bords d'extrémité transversale 211, 212 opposés. Une surface de contact lisse et régulière est ainsi formée entre la portion de contact 10 du moyen de compression 5 et la deuxième paroi 9 de l'échangeur thermique 4. As previously described, the contact portion 10 of the compression means 5 extends between at least two opposite end edges of the second wall 9 of the heat exchanger 4. According to the first embodiment illustrated in FIG. 2 this contact portion 10 thus extends at least between two transverse end edges 211, 212 of this second wall 9. In addition, it is noted that the contact between this contact portion 10 and the second wall 9 is direct and continuous, all along the stacking direction D, between two opposite transverse end edges 211, 212. A smooth and even contact surface is thus formed between the contact portion 10 of the compression means 5 and the second wall 9 of the heat exchanger 4.
Tel que le suggère la figure 2, illustrant partiellement le dispositif de refroidissement dans sa dimension longitudinale, la surface de contact formée entre la portion de contact 10 du moyen de compression 5 et la deuxième paroi 9 de l'échangeur thermique 4 s'étend également entre deux bords d'extrémité longitudinale 111, 112 (ici non visible), c'est-à-dire tout le long de l'échangeur thermique relativement à l'axe longitudinal. As suggested in FIG. 2, partially illustrating the cooling device in its longitudinal dimension, the contact surface formed between the contact portion 10 of the compression means 5 and the second wall 9 of the heat exchanger 4 also extends between two longitudinal end edges 111, 112 (here not visible), that is to say all along the heat exchanger relative to the longitudinal axis.
Selon une autre caractéristique de la présente invention notamment illustrée sur les figures 6 à 8, cette surface de contact peut s'étendre à la fois le long de l'axe longitudinal X et le long de la direction d'empilement D. Selon cette autre caractéristique, la surface de contact s'étend alors sur l'intégralité de la deuxième paroi de l'échangeur thermique en étant formé par l'intégralité de la portion de contact du moyen de compression. Selon l'une quelconque de ces trois caractéristiques, on comprend que la surface de contact est grande par rapport aux dimensions de l'échangeur thermique. Cette importante surface de contact permet notamment de répartir de façon homogène la force de rappel élastique exercée par le moyen de compression sur l'échangeur thermique. Ainsi, l'effort encaissé par cet échangeur thermique est moins traumatisant et cet échangeur thermique se détériore alors moins vite. According to another characteristic of the present invention, particularly illustrated in FIGS. 6 to 8, this contact surface may extend both along the longitudinal axis X and along the stacking direction D. According to this other characteristic, the contact surface then extends over the entire second wall of the heat exchanger being formed by the entirety of the contact portion of the compression means. According to any one of these three characteristics, it is understood that the contact surface is large relative to the dimensions of the heat exchanger. This large contact area makes it possible in particular to distribute homogeneously the elastic restoring force exerted by the compression means on the heat exchanger. Thus, the effort collected by this heat exchanger is less traumatic and this heat exchanger then deteriorates less quickly.
Dans l'exemple du premier mode de réalisation illustré sur la figure 2, l'organe de rappel élastique 50 est un ressort à lame métallique, formée par une partie centrale formant la portion de contact 10 au sens de l'invention, apte à être plaquée contre l'échangeur thermique, et par des parties d'extrémité disposées de part et d'autre de cette partie centrale. Tel que cela est visible, la partie centrale formant portion de contact 10 de ce ressort à lames métalliques est plane et régulière et ses extrémités 14, destinées à être disposées au contact de la paroi du boîtier 1, sont courbes. La forme courbée des extrémités permet de générer la force de rappel élastique lorsque la batterie via l'échangeur thermique appuie sur et contraint le ressort. In the example of the first embodiment illustrated in FIG. 2, the elastic return member 50 is a spring with a metal blade, formed by a central part forming the contact portion 10 in the sense of the invention, capable of being pressed against the heat exchanger, and end portions disposed on either side of this central portion. As can be seen, the central portion forming the contact portion 10 of this metal leaf spring is flat and regular and its ends 14, intended to be arranged in contact with the wall of the housing 1, are curved. The curved shape of the ends makes it possible to generate the elastic restoring force when the battery via the heat exchanger presses and forces the spring.
Les figures 3 à 5 illustrent trois variantes du premier mode de réalisation de la présente invention. Ces trois variantes diffèrent les unes des autres essentiellement par la structure des organes de rappel élastique 50 formant le moyen de compression 5. Les échangeurs thermiques 4 des dispositifs de refroidissement 3 selon ces variantes présentent quant à eux des structures similaires, en ce sens qu'ils s'étendent principalement selon l'axe longitudinal X et présentent des conduits 13 disposés les uns après les autres, le long de la direction d'empilement D précédemment décrite. Figures 3 to 5 illustrate three variants of the first embodiment of the present invention. These three variants differ from each other essentially by the structure of the elastic return members 50 forming the compression means 5. The heat exchangers 4 of the cooling devices 3 according to these variants have, for their part, similar structures, in that they extend mainly along the longitudinal axis X and have conduits 13 arranged one after the other, along the stacking direction D previously described.
Selon une première variante du premier mode de réalisation, telle qu'elle est illustrée sur la figure 3, le dispositif de refroidissement 3 comprend deux échangeurs thermiques 4 pour un organe de rappel élastique 50 unique. L'organe de rappel élastique 50 comprend ainsi deux portions de contact 10, reliées entre elles par un décrochage 18, et respectivement configurées pour former une surface de contact avec l'un de ces échangeurs thermiques 4. Conformément à ce qui a été décrit précédemment, les deux portions de contact 10 s'étendent sur la totalité, ou à tout le moins sur 90%, d'une dimension longitudinale et/ou transversale de la deuxième paroi 9 de l'échangeur thermique disposé en regard de cette portion de contact. Le décrochage 18, agencé entre les deux échangeurs thermiques et qui réalise une cassure dans la planéité des portions de contact, permet de rigidifier l'organe de rappel élastique afin d'éviter qu'il ne s'affaisse en son centre sous le poids des échangeurs thermiques, et de la batterie qu'ils supportent. According to a first variant of the first embodiment, as illustrated in FIG. 3, the cooling device 3 comprises two heat exchangers 4 for a single resilient return member 50. The elastic return member 50 thus comprises two contact portions 10, interconnected by a stall 18, and respectively configured to form a contact surface with one of these heat exchangers 4. In accordance with what has been described above, the two contact portions 10 extend over the whole, or at least 90%, of a longitudinal dimension and / or transverse of the second wall 9 of the heat exchanger disposed opposite this contact portion. The stall 18, arranged between the two heat exchangers and which makes a break in the flatness of the contact portions, makes it possible to stiffen the elastic return member so as to prevent it from sagging in its center under the weight of the heat exchangers, and the battery they support.
Avantageusement, cette variante permet de plaquer simultanément deux échangeurs thermiques 4 contre la batterie, tout en diminuant l'encombrement du dispositif de refroidissement puisque qu'un seul moyen de compression 5 permet de plaquer deux échangeurs thermiques 4. Selon une deuxième variante du premier mode de réalisation illustrée sur la figure 4, l'organe de rappel élastique 50 est un ressort en matière synthétique dont les extrémités 14 sont droites. Ainsi, deux branches 19 émergent d'une partie centrale de la portion de contact 10 et s'étendent selon une direction d'éloignement l'une par rapport à l'autre. Les extrémités libres de ces branches 19 forment les extrémités 14 de l'organe de rappel élastique 50 destinées à être disposées au contact de la paroi du boîtier. Advantageously, this variant makes it possible to simultaneously press two heat exchangers 4 against the battery while reducing the overall size of the cooling device since only one compression means 5 makes it possible to press two heat exchangers 4. According to a second variant of the first embodiment embodiment shown in Figure 4, the elastic return member 50 is a spring of synthetic material whose ends 14 are straight. Thus, two branches 19 emerge from a central portion of the contact portion 10 and extend in a direction away from one another. The free ends of these branches 19 form the ends 14 of the elastic return member 50 intended to be arranged in contact with the wall of the housing.
On peut constater que dans le premier mode de réalisation et dans les deux variantes exposées ci-dessus, le contact entre chaque échangeur thermique 4 et chaque portion de contact 10 du moyen de compression 5 correspondant est continu, entre au moins deux bords d'extrémité opposés, de manière à répartir au mieux la force de compression sur l'échangeur thermique, et qu'il est en outre direct, avec l'échangeur thermique directement au contact du moyen de compression. Selon une troisième variante du premier mode de réalisation illustrée sur la figure 5, le contact entre chaque échangeur thermique 4 et chaque portion de contact 10 du moyen de compression 5 correspondant reste continu, entre au moins deux bords d'extrémité opposés, de manière à répartir au mieux la force de compression sur l'échangeur thermique, mais il est cette fois indirect, avec un matériau intermédiaire 20 qui est interposé entre la portion de contact 10 et la deuxième paroi 9 de l'échangeur thermique 4. It can be seen that in the first embodiment and in the two variants set out above, the contact between each heat exchanger 4 and each contact portion 10 of the corresponding compression means 5 is continuous, between at least two end edges. opposed, so as to distribute the best compression force on the heat exchanger, and it is further direct, with the heat exchanger directly in contact with the compression means. According to a third variant of the first embodiment illustrated in FIG. 5, the contact between each heat exchanger 4 and each contact portion 10 of the corresponding compression means 5 remains continuous, between at least two opposite end edges, so as to distribute the best compression force on the heat exchanger, but this time is indirect, with an intermediate material 20 which is interposed between the contact portion 10 and the second wall 9 of the heat exchanger 4.
Selon cette troisième variante, le matériau intermédiaire 20 est en contact avec la deuxième paroi 9 de l'échangeur thermique 4 d'une part et avec la portion de contact 10 du moyen de compression 5 d'autre part. Le matériau intermédiaire 20 s'étend au moins du premier bord d'extrémité transversale 211 au deuxième bord d'extrémité transversale 212 de la deuxième paroi 9 et que le contact entre cette deuxième paroi 9 et le matériau intermédiaire 20 est continu entre ces deux bords d'extrémité transversale 211, 212. Le matériau intermédiaire 20 peut par exemple être un matériau adhésif.According to this third variant, the intermediate material 20 is in contact with the second wall 9 of the heat exchanger 4 on the one hand and with the contact portion 10 of the compression means 5 on the other hand. The intermediate material 20 extends at least from the first transverse end edge 211 to the second transverse end edge 212 of the second wall 9 and the contact between this second wall 9 and the intermediate material 20 is continuous between these two edges. transverse end 211, 212. The intermediate material 20 may for example be an adhesive material.
L'interposition de ce matériau intermédiaire 20 est notamment facilitée par les dimensions de la surface de contact réalisée entre l'échangeur thermique 4 et la portion de contact 10 du moyen de compression 5. La dimension de cette surface de contact permet d'étaler le matériau intermédiaire 20 et donc de faciliter sa prise entre l'échangeur thermique et le moyen de compression. On peut de la sorte améliorer la tenue mécanique du dispositif de refroidissement 3, ou assurer une discontinuité électrique, thermique, ou encore chimique entre le moyen de compression 5 et l'échangeur thermique 4. The interposition of this intermediate material 20 is in particular facilitated by the dimensions of the contact surface formed between the heat exchanger 4 and the contact portion 10 of the compression means 5. The dimension of this contact surface allows to spread the intermediate material 20 and thus facilitate its grip between the heat exchanger and the compression means. It is thus possible to improve the mechanical strength of the cooling device 3, or to provide an electrical, thermal, or chemical discontinuity between the compression means 5 and the heat exchanger 4.
Les figures 6 à 8 sont des vues en perspective du dispositif de refroidissement 3 selon trois variantes d'un deuxième mode de réalisation de la présente invention. Selon ce deuxième mode de réalisation, le moyen de compression 5 est un élément massif 51. Par élément massif, on entend notamment un élément présentant la forme d'un bloc, dont l'enveloppe externe présente sensiblement la forme d'un parallélépipède rectangle. Cet élément massif 51 peut par exemple être formé avec du caoutchouc réticulé, tel que l'EPDM (éthylène-propylène-diène monomère), ou bien avec une matière plastique souple. Selon ce deuxième mode de réalisation, l'élément massif 51 présente un premier côté 21 et un deuxième côté 22, opposé à ce premier côté 21. Figures 6 to 8 are perspective views of the cooling device 3 according to three variants of a second embodiment of the present invention. According to this second embodiment, the compression means 5 is a massive element 51. The term "solid element" is understood to mean, in particular, an element having the shape of a block, the outer envelope of which has substantially the shape of a rectangular parallelepiped. This solid element 51 may for example be formed with crosslinked rubber, such as EPDM (ethylene-propylene-diene monomer), or with a flexible plastic material. According to this second embodiment, the solid element 51 has a first side 21 and a second side 22, opposite this first side 21.
Le premier côté 21 est destiné à être disposé au contact de la deuxième paroi 9 de l'échangeur thermique 4 et définit donc la portion de contact 10. Comme cela est visible, l'élément massif 51 s'étend, comme précédemment, entre deux bords d'extrémité transversale 211, 212 opposés de la deuxième paroi 9 de l'échangeur thermique 4 et également entre deux bords d'extrémité longitudinale 111, 112 opposés de cette deuxième paroi 9. Tel que représenté, la portion de contact 10 recouvre ainsi intégralement la deuxième paroi 9 de l'échangeur thermique 4. The first side 21 is intended to be placed in contact with the second wall 9 of the heat exchanger 4 and thus defines the contact portion 10. As can be seen, the solid element 51 extends, as before, between two transverse end edges 211, 212 opposite the second wall 9 of the heat exchanger 4 and also between two opposite longitudinal end edges 111, 112 of this second wall 9. As shown, the contact portion 10 thus covers integrally the second wall 9 of the heat exchanger 4.
Le deuxième côté 22 de cet élément massif 51 est quant à lui destiné à être disposé au contact de la paroi du boîtier comprenant la batterie à refroidir. The second side 22 of this massive element 51 is for its part arranged to be in contact with the wall of the housing comprising the battery to be cooled.
Selon une première variante illustrée sur la figure 6, le premier côté 21 et le deuxième côté 22 de l'élément massif présente des surfaces lisses et régulières. Une telle structure régulière peut notamment permettre l'insertion entre l'élément massif 51 et l'échangeur thermique d'une couche d'un matériau intermédiaire tel que décrit précédemment dans une variante du premier mode de réalisation. According to a first variant illustrated in Figure 6, the first side 21 and the second side 22 of the solid element has smooth and regular surfaces. Such a regular structure may in particular allow insertion between the solid element 51 and the heat exchanger of a layer of an intermediate material as described above in a variant of the first embodiment.
Selon une deuxième variante illustrée sur la figure 7, le premier côté 21 de l'élément massif 51 présente une pluralité de picots 23 tandis que le deuxième côté 22 présente une surface lisse. L'enveloppe externe du moyen de compression reste inchangée de sorte que le moyen de compression reste un élément massif au sens de ce qui a été entendu précédemment. Cette pluralité de picots 23 définit un plan formant la portion de contact 10 qui s'étend sur l'ensemble de la deuxième paroi 9 de l'échangeur thermique 4, assurant ainsi une répartition homogène de la force de rappel élastique appliquée sur cet échangeur thermique 4 par le moyen de compression 5. On comprend par ailleurs que la surface de contact entre le moyen de compression 5 et la deuxième paroi 9 de l'échangeur thermique ainsi formée est discontinue. According to a second variant illustrated in Figure 7, the first side 21 of the solid element 51 has a plurality of pins 23 while the second side 22 has a smooth surface. The outer envelope of the compression means remains unchanged so that the compression means remains a massive element in the sense of what has been heard previously. This plurality of pins 23 defines a plane forming the contact portion 10 which extends over the whole of the second wall 9 of the heat exchanger 4, thus ensuring a homogeneous distribution of the elastic return force applied to this heat exchanger 4 by the compression means 5. It is further understood that the contact surface between the compression means 5 and the second wall 9 of the heat exchanger thus formed is discontinuous.
Selon une troisième variante illustrée sur la figure 8, l'élément massif 51 présente une structure alvéolée 24, en nid d'abeille. Ces alvéoles définissent un plan formant la portion de contact 10 qui s'étend, comme précédemment, sur l'ensemble de la deuxième paroi 9 de l'échangeur thermique 4. Comme pour la deuxième variante, la surface de contact formée entre le moyen de compression 5 et la deuxième paroi 9 de l'échangeur thermique est discontinue. La présente invention propose donc un dispositif de refroidissement d'une batterie pour véhicule automobile comprenant un moyen de compression configuré pour exercer une force de rappel élastique sur au moins un échangeur thermique afin de plaquer ce dernier contre une face de la batterie à refroidir, l'échangeur thermique et le moyen de compression étant configurés pour répartir la force de rappel élastique sur l'ensemble d'une paroi de l'au moins un échangeur thermique, l'effort étant alors moins important et mieux assimilé par cet au moins un échangeur thermique. De plus, le dispositif de refroidissement selon la présente invention ne comprend que deux composants, facilement assemblables entre eux. L'invention ne saurait toutefois se limiter aux moyens et configurations décrits et illustrés ici, et elle s'étend également à tous moyens ou configurations équivalents et à toute combinaison techniquement opérante de tels moyens. En particulier, les formes et la disposition du moyen de compression, peuvent être modifiées sans nuire à l'invention, dans la mesure où elles remplissent les fonctionnalités décrites dans le présent document, et notamment que ce moyen de compression exerce une force de rappel élastique répartie de façon homogène sur une paroi de l'échangeur thermique. According to a third variant illustrated in Figure 8, the solid element 51 has a honeycomb structure 24, honeycomb. These cells define a plane forming the contact portion 10 which extends, as previously, over the entire second wall 9 of the heat exchanger 4. As for the second variant, the contact surface formed between the means of compression 5 and the second wall 9 of the heat exchanger is discontinuous. The present invention therefore proposes a device for cooling a battery for a motor vehicle comprising a compression means configured to exert a resilient restoring force on at least one heat exchanger in order to press the heat exchanger against a face of the battery to be cooled. heat exchanger and the compression means being configured to distribute the elastic restoring force over the entire wall of the at least one heat exchanger, the force then being less important and better assimilated by the at least one heat exchanger thermal. In addition, the cooling device according to the present invention comprises only two components, easily assembled together. The invention, however, can not be limited to the means and configurations described and illustrated here, and it also extends to any equivalent means or configurations and any technically operating combination of such means. In particular, the shapes and arrangement of the compression means can be modified without harming the invention, insofar as they fulfill the functionalities described herein, and in particular that this compression means exerts an elastic restoring force. distributed homogeneously on a wall of the heat exchanger.
Les modes de réalisation qui sont décrits ci-dessus ne sont nullement limitatifs : on pourra notamment imaginer des variantes de l'invention ne comprenant qu'une sélection de caractéristiques décrites par la suite isolées des autres caractéristiques mentionnées dans ce document, si cette sélection de caractéristiques est suffisante pour conférer un avantage technique ou pour différencier l'invention par rapport à l'état de la technique antérieur. The embodiments described above are in no way limiting: it will be possible to imagine variants of the invention understanding that a selection of characteristics subsequently described isolated from the other features mentioned in this document, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.

Claims

REVENDICATIONS
1. Dispositif de refroidissement (3) d'une batterie (2) d'un véhicule automobile, comprenant au moins un échangeur thermique (4) présentant une première paroi (8) destinée à être plaquée contre la batterie (2) et une deuxième paroi (9) opposée à la première paroi (8), le dispositif de refroidissement (3) comprenant en outre un moyen de compression (5) configuré pour plaquer l'au moins un échangeur thermique (4) contre la batterie (2), ce moyen de compression (5) présentant au moins une portion de contact (10) destinée à être disposée au contact de la deuxième paroi (9) de l'au moins un échangeur thermique (4), caractérisé en ce que la portion de contact (10) du moyen de compression (5) s'étend d'un premier bord (11, 111, 211) de la deuxième paroi (9) de l'au moins un échangeur thermique (4) à un deuxième bord (12, 112, 212) opposé de cette deuxième paroi (9). 1. Device for cooling (3) a battery (2) of a motor vehicle, comprising at least one heat exchanger (4) having a first wall (8) intended to be pressed against the battery (2) and a second wall (9) opposite to the first wall (8), the cooling device (3) further comprising a compression means (5) configured to press the at least one heat exchanger (4) against the battery (2), this compression means (5) having at least one contact portion (10) intended to be arranged in contact with the second wall (9) of the at least one heat exchanger (4), characterized in that the contact portion (10) of the compression means (5) extends from a first edge (11, 111, 211) of the second wall (9) of the at least one heat exchanger (4) to a second edge (12, 112, 212) opposite this second wall (9).
2. Dispositif de refroidissement (3) selon la revendication précédente, dans lequel la portion de contact (10) du moyen de compression (5) est en contact avec la deuxième paroi (9) de l'au moins un échangeur thermique (4), tout le long de cette deuxième paroi (9) entre deux bords (11, 111, 211 ; 12, 112, 212) opposés. 2. Cooling device (3) according to the preceding claim, wherein the contact portion (10) of the compression means (5) is in contact with the second wall (9) of the at least one heat exchanger (4). all along this second wall (9) between two opposite edges (11, 111, 211, 12, 112, 212).
3. Dispositif de refroidissement (3) selon l'une quelconque des revendications précédentes, dans lequel le moyen de compression (5) est un organe de rappel élastique (50). 3. Cooling device (3) according to any one of the preceding claims, wherein the compression means (5) is an elastic return member (50).
4. Dispositif de refroidissement (3) selon la revendication précédente, dans lequel l'organe de rappel élastique (50) comprend deux portions de contact (10) respectivement en contact avec un échangeur thermique (4), un décrochage (18) étant réalisé entre ces portions de contact (10). 4. Cooling device (3) according to the preceding claim, wherein the elastic return member (50) comprises two contact portions (10) respectively in contact with a heat exchanger (4), a stall (18) being realized between these contact portions (10).
5. Dispositif de refroidissement (3) selon l'une quelconque des revendications précédentes, dans lequel un matériau intermédiaire (20) est interposé entre la portion de contact (10) du moyen de compression (5) et la deuxième paroi (9) de l'échangeur thermique (4). 5. Cooling device (3) according to any one of the preceding claims, wherein an intermediate material (20) is interposed between the contact portion (10) of the compression means (5) and the second wall (9) of the heat exchanger (4).
6. Dispositif de refroidissement (3) selon la revendication 1, dans lequel le moyen de compression (5) est un élément massif (51). 6. Cooling device (3) according to claim 1, wherein the compression means (5) is a solid element (51).
7. Dispositif de refroidissement (3) selon la revendication précédente, dans lequel la portion de contact (10) de l'élément massif (51) présente une pluralité de picots (23). 7. Cooling device (3) according to the preceding claim, wherein the contact portion (10) of the solid element (51) has a plurality of pins (23).
8. Dispositif de refroidissement (3) selon la revendication 5, dans lequel l'élément massif (51) présente une structure alvéolée (24). 8. Cooling device (3) according to claim 5, wherein the solid element (51) has a honeycomb structure (24).
9. Boitier de support (1) d'au moins une batterie (2) caractérisé en ce qu'il comprend au moins une batterie (2) et au moins un dispositif de refroidissement (3) selon l'une quelconque des revendications précédentes. 9. Support case (1) of at least one battery (2) characterized in that it comprises at least one battery (2) and at least one cooling device (3) according to any one of the preceding claims.
10. Boîtier de support (1) selon la revendication précédente, dans lequel le dispositif de refroidissement (3) est disposé entre une paroi (7) du boîtier (1) et une face (6) de la batterie (2). 10. Housing support (1) according to the preceding claim, wherein the cooling device (3) is disposed between a wall (7) of the housing (1) and a face (6) of the battery (2).
PCT/FR2018/051150 2017-05-15 2018-05-07 Cooling device for a motor vehicle battery WO2018211204A1 (en)

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FR1754251 2017-05-15
FR1754251A FR3066326B1 (en) 2017-05-15 2017-05-15 COOLING DEVICE FOR A MOTOR VEHICLE BATTERY

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