EP4032140A1 - Heat exchange plate for a battery - Google Patents

Heat exchange plate for a battery

Info

Publication number
EP4032140A1
EP4032140A1 EP20757628.1A EP20757628A EP4032140A1 EP 4032140 A1 EP4032140 A1 EP 4032140A1 EP 20757628 A EP20757628 A EP 20757628A EP 4032140 A1 EP4032140 A1 EP 4032140A1
Authority
EP
European Patent Office
Prior art keywords
heat exchange
plate
base plate
level
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20757628.1A
Other languages
German (de)
French (fr)
Inventor
Abdelillah EL HABCHI
Jeremy MOIGNARD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stellantis Auto SAS
Original Assignee
PSA Automobiles SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP4032140A1 publication Critical patent/EP4032140A1/en
Pending legal-status Critical Current

Links

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
    • H01M10/65—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
    • H01M10/61—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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 present invention relates to the field of batteries, and more particularly the field of batteries for the electric propulsion of vehicles with hybrid or electric propulsion.
  • an assembly comprising at least one battery module containing at least one electrochemical cell.
  • This battery optionally comprises electrical or electronic means for managing the electrical energy of this at least one module.
  • the battery pack often being designated by the English expression “battery pack”, this casing generally containing a mounting interface, and connection terminals.
  • electrochemical cell generating current by chemical reaction, for example of lithium-ion (or Li-ion) type, of Ni-Mh or Ni type -Cd or even lead.
  • a cooling plate for such an arrangement is known from patent document FR-A1 -3003938 and has a heat exchange plate comprising a base and a contact plate, the base being of molded plastic and the plate of contact being made in a thermally conductive material.
  • the plastic base allows a greater variety of fixing methods with the support to which it is fixed, for example by adding specific fixing brackets.
  • a drawback of this design is that the plate and the module are fixed independently of one another in the casing, causing positioning dispersions between the module and the plate.
  • the housing having the interface assembly of the module and the plate is complex to achieve, all the more complex as this housing is generally a large part receiving several modules and several heat exchange plates.
  • the aim of the invention is to remedy these drawbacks, in particular by optimizing the cooling plate.
  • the invention relates to a heat exchange system comprising a battery module and a heat exchange plate by conduction with the battery module, this heat exchange plate comprising a base plate and a thermal contact plate in contact with the battery module and fixed to the base plate, the base plate comprising a first means for fixing the heat exchange plate on a support, and comprising a second means for fixing the heat exchange plate. the heat exchange plate against the battery module, this second fixing means being separate from the first fixing means.
  • the base plate can be pre-assembled on the battery module, the one and the other then being precisely positioned between them due to a chain of reduced dimension.
  • the base plate integrating the first and the second fixing means, the support receiving the base plate can be considerably simplified by comprising only the mounting interface of the base plate, and no longer the interface of the base plate. mounting the battery module.
  • the base plate is made of plastic.
  • the base plate can have a significant thickness, and then have a high rigidity of shape without being too heavy, compared to a metal base plate such as an aluminum alloy. This rigidity of form then makes it possible to fix several battery modules on the same base plate.
  • the plastic material is heat-insulating, again compared to the metallic material.
  • the base plate is made of a heat-insulating plastic material whose thermal conductivity (l) is less than 2 Wm-1 -K-1 at 20 ° C. This makes it possible in particular to avoid heat exchanges between the base plate and an environment outside the heat exchange system.
  • the plastic material comprises a filler.
  • plastics in the form of resins loaded with glass or carbon fibers then forming a material whose thermal conductivity will be a little higher than uncharged plastics, between 0.15 and 2 Wm-1 -K-1 at 20 ° C depending on the orientation or not of the fibers, and the direction of heat propagation considered, and allowing to increase the rigidity of the base plate and therefore, to increase its cut.
  • the first fixing means or the second fixing means comprise a metal insert in the material of the base plate, this metal insert having a bore shaped to receive a screw.
  • the first fixing means comprises for example a screw and an insert forming a spacer having a smooth central bore through which the screw passes.
  • the screw tightening force is therefore taken up by the spacer and not by the base plate, the threaded end of the screw being caught in a threaded hole in the support. This prevents the plastic material from creeping.
  • the second fixing means comprises for example a screw and an insert having a threaded central bore through which the threaded end of the screw passes, the screw head blocking the battery module against the heat exchange plate without risk of degrade the thread of the insert, the latter being metallic.
  • the base plate and the thermal contact plate form a cavity between them through which a heat transfer fluid passes.
  • the base plate comprises, in its thickness, a recess through which the heat transfer fluid passes, the cavity forming a first level of circulation of the heat transfer fluid, and the recess forming a second level of circulation of this heat transfer fluid.
  • the heat transfer fluid has a path in the cavity which is a function of zones of the battery module to be cooled, this path possibly being for example rectilinear in several parallel channels or in the form of overlapping coils or not.
  • the heat transfer fluid travels through the recess which is not a function of thermal stresses since the base is in thermo-insulating material, but depending on the desired pressure drop of the fluid, generally minimal.
  • the second level of circulation makes it possible to transport the heat transfer fluid in an isothermal manner.
  • This recess also makes it possible to increase the structural rigidity of the base plate without making it heavier.
  • the first level and the second level are fluidly connected in series.
  • the second level then forms a fluid return circuit which, being thermally isolated, does not disturb the performance of the heat exchange occurring between the battery module and the heat exchange plate.
  • the heat transfer fluid of the first level is completely emptied through the second level.
  • the first level and the second level are fluidly connected in parallel.
  • the second level then forms a circuit transporting part of the heat transfer fluid which, being thermally insulated, will not be heated by the fluid in the cavity.
  • This second level will, for example, open into a cavity and / or a recess of a second heat exchange plate.
  • the subject of the invention is also a battery comprising a heat exchange system as described above, and a casing confining the heat exchange system, the support being a bottom of the casing.
  • This housing comprises, for example, a receptacle receiving the heat exchange system, this receptacle being covered with a cover. This casing then forms a confined internal space protecting all the modules and heat exchange plates from any splashing water or shocks.
  • the subject of the invention is also a method for assembling a battery as described above, this method comprising successively a first step of assembling the heat exchange plate against the battery module, and a second step. assembly step of this assembly on the bottom of the housing.
  • FIG 1 shows a heat exchange system according to the invention.
  • FIG 2 Figure 2 shows this heat exchange system with a section to the right of the second fixing means.
  • FIG. 1 shows a heat exchange system according to a particular embodiment of the invention, without limitation.
  • This heat exchange system comprises ten battery modules 2 and a single heat exchange plate 1 by conduction with each of the battery modules 2.
  • the battery modules 2 are divided into a group of eight modules 2 and a group of two. modules 2, and in a variant not shown there are two thermal plates 2 of different size, one being in thermal contact with each of the modules of the group of eight modules 2, the other being in thermal contact with each of the modules of the group of two modules 2.
  • two thermal plates 2 of different size, one being in thermal contact with each of the modules of the group of eight modules 2, the other being in thermal contact with each of the modules of the group of two modules 2.
  • other configurations are possible, with three or more plates, and modules 2 of any shape.
  • the modules 2 are preferably parallelepipedal and have a face in contact with the heat exchange plate 1.
  • this face is a bottom face of the modules 2 when the modules 2 are in position. of use in a land vehicle for example, but as a variant this face can equally well be any face of the module 2.
  • thermal paste or a thermal mat 12 (see Figure 2) promoting heat exchange by conduction between the module 2 and the plate 1 by filling in asperities or voids created by manufacturing dispersions of modules 2 or plates 1.
  • the heat exchange by conduction between the module 2 and the plate 1 is a thermal flow considered in both possible directions: the heat going from the module 2 to the plate 1 for cooling of the module 2 or, conversely , going from plate 1 to module 2 for heating of module 2.
  • a network of heat transfer fluid pipes (not shown) connects the plates 1 together, this heat transfer fluid transporting the calories to an exchanger (not shown) for example, an air / heat transfer fluid exchanger.
  • FIG. 2 illustrates the heat exchange plate 1 in thermal contact with the face of the module 2.
  • This plate 1 comprises a base plate 3 and a thermal contact plate 4 in contact with the battery module 2 and fixed. to the base plate 3, for example by crimping or gluing or screwing.
  • the base plate 3 comprises a first fixing means 6 of the heat exchange plate 1 on a support (not shown).
  • the base plate 3 comprises a second fixing means 7 of the heat exchange plate 1 against the battery module 2. This second fixing means 7 is separate from the first fixing means 6.
  • the base plate 3 is made of plastic, for example injected plastic.
  • the plastic material includes a filler.
  • the first fixing means 6 or the second fixing means 7 comprise a metal insert 10, 8 in the material of the base plate 3, this metal insert 10, 8 having a bore shaped to receive a screw (not shown ).
  • the insert 10 of the first fixing means 6, called the first insert 10 is a spacer having a smooth central bore through which a first screw passes the threaded end of which is caught in a threaded hole in the support, each end of the spacer flush with the outer surface of the base plate 3 so that the spacer takes up all of the clamping force between the head of the first screw and the support.
  • the insert 8 of the second fixing means 7, called the second insert 8 has a threaded central bore engaged with the threaded end of a second screw, this second screw passing through a smooth bore 14 of the module 2, the head of the second screw tightening the battery module 2 against the heat exchange plate 1 without risk of damaging the thread of the second insert 8, the latter being metallic.
  • the first insert 10 and the second insert 8 are for example overmolded by the base plate 3. As a variant, these inserts 10, 8 are screwed, glued, or crimped into the base plate 3.
  • first and second inserts 10, 8 are arranged in the thickness of a rib 13 of the base plate 3, to promote adhesion between the inserts 10, 8 and the base plate 3.
  • This rib 13 is ideally disposed partially or entirely along the length of one of the four sides of the base plate 3, ideally on the longer side so as to further stiffen the base plate 3.
  • a second rib 13 is arranged parallel to the first, on the opposite side of the base plate 3, this second rib 13 also incorporating first and second means of fixing 6, 7.
  • Other geometries of the ribs 13 and base plate 3 can be envisaged, in particular when the battery modules 2 are not parallelepipedal, for example cylindrical or with broken planes to adapt to the interfaces of the vehicle structure .
  • the base plate 3 and the thermal contact plate 4 form a cavity 5 between them traversed by the heat transfer fluid.
  • the base plate 3 comprises, in its thickness, a recess 11 through which the heat transfer fluid passes, the cavity 5 forming a first level of circulation of the heat transfer fluid, and the recess 11 forming a second level of circulation of this fluid. coolant.
  • the first level and the second level are for example fluidly connected in series, but as a variant the first level and the second level are fluidically connected in parallel.
  • this partition 15 advantageously participates in the stiffening of the base plate 3, in the same way as the rib 13.
  • the series connection of the two levels is achieved, for example, by fluid communication (not shown) at one end of the heat exchange plate 1 between the two levels.
  • This connection can be internal to the heat exchange plate 1 or external by using a pipe of the network of pipes for heat transfer fluid.
  • the heat transfer fluid then passes successively through the first level then the second level, the second level then forming a fluid return circuit which, being thermally isolated, does not disturb the efficiency of the heat exchange occurring between the battery module 2 and the heat exchange plate 1.
  • the heat transfer fluid from the first level is completely emptied through the second level.
  • the parallel connection is made, for example, by providing an inlet for the coolant fluid in the heat exchange plate 1 common to the two levels, each level having a separate coolant outlet from one another.
  • the fluid leaving the first level can then be channeled to the air / heat transfer fluid exchanger via the network of heat transfer fluid pipes, while the fluid leaving the second level can be channeled to a fluid inlet of another plate. heat exchange 1 before being in turn channeled to the air / heat transfer fluid exchanger.
  • the second level then forms a circuit channeling part of the heat transfer fluid which, being thermally insulated, will not be heated by the fluid located in the cavity 5.
  • This second level will lead, for example, into a cavity and / or a recess. a second heat exchange plate via the network of heat transfer fluid pipes.
  • a casing confines this heat exchange system, this assembly then forming a battery, for example a traction battery of a vehicle.
  • the support is for example a bottom of this casing.
  • This casing isolates the modules 2 from all contact with splashing water, and confines all gaseous emissions from the modules 2 in the internal space of this casing.
  • a vehicle in particular an electric or hybrid vehicle, advantageously comprises such a battery.
  • a method of assembling such a battery successively comprising a first step of assembling the heat exchange plate 1 against the battery module 2, and a second step of assembling this assembly on the bottom of the housing is advantageous.
  • This process makes it possible to have a module 2 and heat exchange plate 1 assembly pre-assembled, for example from a supplier, independently of the assembly of this assembly in the assembly line of the vehicle incorporating this casing.
  • This process facilitates assembly while ensuring the quality of the assembly of module 2 on plate 1 in terms of relative positioning and thermal conductivity.
  • the assembly line is also less complex and the line edges are less cluttered while having a reduced footprint.
  • the first step of assembling the heat exchange plate 1 against the battery module 2 is carried out by an operator or an assembly means.
  • automated system carrying out a first screwing sub-step using the second fixing means 7 which, in the example described above, comprises the second screw tightening the heat exchange plate 1 against the battery module 2.
  • the second step of assembly of this assembly on the bottom of the casing is carried out by an operator or an automated assembly means performing a second screwing sub-step using the first fixing means 6 which, in the example described above, comprises the first screw tightening the heat exchange plate 1 against the bottom of the housing.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Heat exchange system comprising a battery module (2) and a plate for exchanging heat (1) through conduction with the battery module (2), said plate (1) comprising a base plate (3) and a thermal contact plate (4) attached to the base plate (3), the base plate (3) comprising a first means (6) for attaching the heat exchange plate (1) to a support member, and comprising a second means (7) for attaching the heat exchange plate (1) to the battery module (2), said second attachment means (7) being separate from the first attachment means (6).

Description

DESCRIPTION DESCRIPTION
TITRE : PLAQUE D’ECHANGE THERMIQUE D’UNE BATTERIE TITLE: BATTERY HEAT EXCHANGE PLATE
[001 ] La présente invention revendique la priorité de la demande françaiseThe present invention claims the priority of the French application
1910397 déposée le 20.09.2019 dont le contenu (texte, dessins et revendications) est ici incorporé par référence. 1910397 filed on 20.09.2019, the content of which (text, drawings and claims) is incorporated here by reference.
[002] La présente invention concerne le domaine des batteries, et plus particulièrement le domaine des batteries pour la propulsion électrique des véhicules à propulsion hybride ou électrique. The present invention relates to the field of batteries, and more particularly the field of batteries for the electric propulsion of vehicles with hybrid or electric propulsion.
[003] On comprendra par batterie, dans tout le texte de ce document, un ensemble comprenant au moins un module de batterie contenant au moins une cellule électrochimique. Cette batterie comprend éventuellement des moyens électriques ou électroniques pour la gestion d’énergie électrique de ce au moins un module. Lorsqu’il y a plusieurs modules, ils sont regroupés dans un bac ou carter et forment alors un bloc batteries, ce bloc batteries étant souvent désigné par l’expression anglaise « pack batteries », ce carter contenant généralement une interface de montage, et des bornes de raccordement. By battery will be understood, throughout the text of this document, an assembly comprising at least one battery module containing at least one electrochemical cell. This battery optionally comprises electrical or electronic means for managing the electrical energy of this at least one module. When there are several modules, they are grouped together in a tray or casing and then form a battery pack, this battery pack often being designated by the English expression “battery pack”, this casing generally containing a mounting interface, and connection terminals.
[004] Par ailleurs, on comprendra par cellule électrochimique dans tout le texte de ce document, des cellules générant du courant par réaction chimique, par exemple de type lithium-ion (ou Li-ion), de type Ni-Mh, ou Ni-Cd ou encore plomb. [004] Moreover, by electrochemical cell will be understood throughout the text of this document, cells generating current by chemical reaction, for example of lithium-ion (or Li-ion) type, of Ni-Mh or Ni type -Cd or even lead.
[005] Dans ce domaine, il est connu d’assembler une plaque d’échange thermique de batterie dans un bac de batterie, puis de monter un module de batterie dans le bac et en appui contre la plaque de refroidissement. [005] In this field, it is known to assemble a battery heat exchange plate in a battery tray, then to mount a battery module in the tray and resting against the cooling plate.
[006] Une plaque de refroidissement pour un tel agencement est connue du document de brevet FR-A1 -3003938 et présente une plaque d'échange thermique comportant une base et une plaque de contact, la base étant en matière plastique moulée et la plaque de contact étant réalisée dans une matière thermo conductrice. La base en matière plastique permet une plus grande variété de modes de fixation avec le support sur lequel elle se fixe, par exemple par l'ajout de pattes de fixation spécifiques. A cooling plate for such an arrangement is known from patent document FR-A1 -3003938 and has a heat exchange plate comprising a base and a contact plate, the base being of molded plastic and the plate of contact being made in a thermally conductive material. The plastic base allows a greater variety of fixing methods with the support to which it is fixed, for example by adding specific fixing brackets.
[007] Un inconvénient de cette conception est que la plaque et le module sont fixés indépendamment l’un de l’autre dans le carter, engendrant des dispersions de positionnement entre le module et la plaque. En outre, le carter ayant l’interface de montage du module et de la plaque est complexe à réaliser, d’autant plus complexe que ce carter est en général une grande pièce recevant plusieurs modules et plusieurs plaques d’échange thermique. [007] A drawback of this design is that the plate and the module are fixed independently of one another in the casing, causing positioning dispersions between the module and the plate. In addition, the housing having the interface assembly of the module and the plate is complex to achieve, all the more complex as this housing is generally a large part receiving several modules and several heat exchange plates.
[008] Le but de l’invention est de remédier à ces inconvénients, notamment en optimisant la plaque de refroidissement. [008] The aim of the invention is to remedy these drawbacks, in particular by optimizing the cooling plate.
[009] A cet effet, l’invention a pour objet un système d’échange thermique comprenant un module de batterie et une plaque d’échange thermique par conduction avec le module de batterie, cette plaque d’échange thermique comprenant une plaque de base et une plaque de contact thermique en contact avec le module de batterie et fixée à la plaque de base, la plaque de base comprenant un premier moyen de fixation de la plaque d’échange thermique sur un support, et comprenant un deuxième moyen de fixation de la plaque d’échange thermique contre le module de batterie, ce deuxième moyen de fixation étant distinct du premier moyen de fixation. [009] To this end, the invention relates to a heat exchange system comprising a battery module and a heat exchange plate by conduction with the battery module, this heat exchange plate comprising a base plate and a thermal contact plate in contact with the battery module and fixed to the base plate, the base plate comprising a first means for fixing the heat exchange plate on a support, and comprising a second means for fixing the heat exchange plate. the heat exchange plate against the battery module, this second fixing means being separate from the first fixing means.
[010] Ainsi la plaque de base peut être préassemblée sur le module de batterie, l’un et l’autre étant alors précisément positionnés entre eux du fait d’une chaîne de cote réduite. En outre, la plaque de base intégrant le premier et le deuxième moyen de fixation, le support recevant la plaque de base peut être considérablement simplifié en ne comprenant que l’interface de montage de la plaque de base, et non plus l’interface de montage du module de batterie. [010] Thus the base plate can be pre-assembled on the battery module, the one and the other then being precisely positioned between them due to a chain of reduced dimension. In addition, the base plate integrating the first and the second fixing means, the support receiving the base plate can be considerably simplified by comprising only the mounting interface of the base plate, and no longer the interface of the base plate. mounting the battery module.
[011] Selon un mode de réalisation de l’invention la plaque de base est en matière plastique. [011] According to one embodiment of the invention, the base plate is made of plastic.
[012] Ainsi la plaque de base peut avoir une épaisseur importante, et présenter alors une forte rigidité de forme sans pour autant être trop lourde, comparativement à une plaque de base métallique comme un alliage d’aluminium. Cette rigidité de forme permet alors de fixer plusieurs modules de batterie sur une même plaque de base. [012] Thus the base plate can have a significant thickness, and then have a high rigidity of shape without being too heavy, compared to a metal base plate such as an aluminum alloy. This rigidity of form then makes it possible to fix several battery modules on the same base plate.
[013] En outre, la matière plastique est thermo-isolante, toujours comparativement à la matière métallique. Par exemple, la plaque de base est réalisée en une matière plastique thermo-isolante dont la conductivité thermique (l ) est inférieure à 2 W-m-1 -K-1 à 20°C. Cela permet notamment d’éviter des échanges thermiques entre la plaque de base et un environnement extérieur au système d’échange thermique. [014] Selon un mode de réalisation de l’invention, la matière plastique comprend une charge. [013] In addition, the plastic material is heat-insulating, again compared to the metallic material. For example, the base plate is made of a heat-insulating plastic material whose thermal conductivity (l) is less than 2 Wm-1 -K-1 at 20 ° C. This makes it possible in particular to avoid heat exchanges between the base plate and an environment outside the heat exchange system. [014] According to one embodiment of the invention, the plastic material comprises a filler.
[015] On notera à titre d’exemple des matières plastiques sous forme de résines chargées en fibres de verre ou de carbone, formant alors une matière dont la conductivité thermique sera un peu plus élevée que les plastiques non chargés, entre 0,15 et 2 W-m-1 -K-1 à 20°C selon l’orientaticn ou non des fibres, et le sens de propagation de la chaleur considéré, et permettant d’augmenter la rigidité de la plaque de base et donc, d’augmenter sa taille. [015] By way of example, there will be noted plastics in the form of resins loaded with glass or carbon fibers, then forming a material whose thermal conductivity will be a little higher than uncharged plastics, between 0.15 and 2 Wm-1 -K-1 at 20 ° C depending on the orientation or not of the fibers, and the direction of heat propagation considered, and allowing to increase the rigidity of the base plate and therefore, to increase its cut.
[016] Selon un mode de réalisation de l’invention, le premier moyen de fixation ou le deuxième moyen de fixation comprennent un insert métallique dans la matière de la plaque de base, cet insert métallique ayant un alésage conformé pour recevoir une vis. [016] According to one embodiment of the invention, the first fixing means or the second fixing means comprise a metal insert in the material of the base plate, this metal insert having a bore shaped to receive a screw.
[017] Le premier moyen de fixation comprend par exemple une vis et un insert formant une entretoise ayant un alésage central lisse traversé par la vis. L’effort de serrage de la vis est donc repris par l’entretoise et non pas par la plaque de base, l’extrémité filetée de la vis se prenant dans un trou fileté du support. On évite ainsi le fluage de la matière plastique. [017] The first fixing means comprises for example a screw and an insert forming a spacer having a smooth central bore through which the screw passes. The screw tightening force is therefore taken up by the spacer and not by the base plate, the threaded end of the screw being caught in a threaded hole in the support. This prevents the plastic material from creeping.
[018] Le deuxième moyen de fixation comprend par exemple une vis et un insert ayant un alésage central fileté traversé par l’extrémité filetée de la vis, la tête de vis bloquant le module de batterie contre la plaque d’échange thermique sans risque de dégrader le filetage de l’insert, ce dernier étant métallique. [018] The second fixing means comprises for example a screw and an insert having a threaded central bore through which the threaded end of the screw passes, the screw head blocking the battery module against the heat exchange plate without risk of degrade the thread of the insert, the latter being metallic.
[019] Selon un mode de réalisation de l’invention, la plaque de base et la plaque de contact thermique forment une cavité entre-elles parcourue par un fluide caloporteur. [019] According to one embodiment of the invention, the base plate and the thermal contact plate form a cavity between them through which a heat transfer fluid passes.
[020] Selon un mode de réalisation de l’invention, la plaque de base comprend, dans son épaisseur, un évidement parcouru par le fluide caloporteur, la cavité formant un premier niveau de circulation du fluide caloporteur, et l’évidement formant un deuxième niveau de circulation de ce fluide caloporteur. [020] According to one embodiment of the invention, the base plate comprises, in its thickness, a recess through which the heat transfer fluid passes, the cavity forming a first level of circulation of the heat transfer fluid, and the recess forming a second level of circulation of this heat transfer fluid.
[021] Ces niveaux, ou étages, sont superposés l’un sur l’autre dans l’épaisseur de la plaque d’échange thermique. Le Fluide caloporteur a un parcourt dans la cavité qui est fonction de zones du module de batterie à refroidir, ce parcourt pouvant être par exemple rectiligne dans plusieurs canaux parallèles ou en forme de serpentins imbriqués ou non. Le Fluide caloporteur a un parcourt dans l’évidement qui n’est pas fonction de contraintes thermiques vu que la plaque de base est en matière thermo-isolante, mais fonction de la perte de charge du fluide souhaitée, généralement minimale. [021] These levels, or stages, are superimposed one on top of the other in the thickness of the heat exchange plate. The heat transfer fluid has a path in the cavity which is a function of zones of the battery module to be cooled, this path possibly being for example rectilinear in several parallel channels or in the form of overlapping coils or not. The heat transfer fluid travels through the recess which is not a function of thermal stresses since the base is in thermo-insulating material, but depending on the desired pressure drop of the fluid, generally minimal.
[022] Ainsi le deuxième niveau de circulation permet de transporter le fluide caloporteur de façon isotherme. [023] Cet évidement permet en outre d’augmenter la rigidité de forme de la plaque de base sans l’alourdir. [022] Thus the second level of circulation makes it possible to transport the heat transfer fluid in an isothermal manner. [023] This recess also makes it possible to increase the structural rigidity of the base plate without making it heavier.
[024] Selon un mode de réalisation de l’invention, le premier niveau et le deuxième niveau sont fluidiquement connectés en série. [024] According to one embodiment of the invention, the first level and the second level are fluidly connected in series.
[025] Le deuxième niveau forme alors un circuit de retour du fluide qui, étant thermiquement isolé, ne perturbe pas le rendement de l’échange thermique se produisant entre le module de batterie et la plaque d’échange thermique. Le fluide caloporteur du premier niveau se vide intégralement par le second niveau. [025] The second level then forms a fluid return circuit which, being thermally isolated, does not disturb the performance of the heat exchange occurring between the battery module and the heat exchange plate. The heat transfer fluid of the first level is completely emptied through the second level.
[026] Selon une variante de réalisation de l’invention, le premier niveau et le deuxième niveau sont fluidiquement connectés en parallèle. [027] Le deuxième niveau forme alors un circuit transportant une partie du fluide caloporteur qui, étant thermiquement isolé, ne sera pas réchauffé par le fluide se trouvant dans la cavité. Ce deuxième niveau débouchera par exemple dans une cavité et/ou un évidement d’une seconde plaque d’échange thermique. [026] According to an alternative embodiment of the invention, the first level and the second level are fluidly connected in parallel. [027] The second level then forms a circuit transporting part of the heat transfer fluid which, being thermally insulated, will not be heated by the fluid in the cavity. This second level will, for example, open into a cavity and / or a recess of a second heat exchange plate.
[028] L’invention a aussi pour objet une batterie comprenant un système d’échange thermique tel que précédemment décrit, et un carter confinant le système d’échange thermique, le support étant un fond du carter. [028] The subject of the invention is also a battery comprising a heat exchange system as described above, and a casing confining the heat exchange system, the support being a bottom of the casing.
[029] Ce carter comprend par exemple un réceptacle recevant le système d’échange thermique, ce réceptacle étant recouvert d’un couvercle. Ce carter forme alors un espace interne confiné protégeant l’ensemble des modules et plaques d’échange thermique de toute projection d’eau ou de chocs. [029] This housing comprises, for example, a receptacle receiving the heat exchange system, this receptacle being covered with a cover. This casing then forms a confined internal space protecting all the modules and heat exchange plates from any splashing water or shocks.
[030] L’invention a aussi pour objet un procédé d’assemblage d’une batterie telle que précédemment décrite, ce procédé comprenant successivement une première étape d’assemblage de la plaque d’échange thermique contre le module de batterie, et une deuxième étape d’assemblage de cet ensemble sur le fond du carter. [030] The subject of the invention is also a method for assembling a battery as described above, this method comprising successively a first step of assembling the heat exchange plate against the battery module, and a second step. assembly step of this assembly on the bottom of the housing.
[031 ] L’invention a aussi pour objet un véhicule comprenant une batterie telle que précédemment décrite. [032] D’autres particularités et avantages apparaîtront à la lecture de la description ci-après d’un mode particulier de réalisation, non limitatif de l’invention, faite en référence aux figures dans lesquelles : [031] Another subject of the invention is a vehicle comprising a battery as described above. [032] Other features and advantages will become apparent on reading the following description of a particular embodiment, not limiting the invention, made with reference to the figures in which:
[Fig 1] : La figure 1 représente un système d’échange thermique conforme à l’invention. [Fig 1]: Figure 1 shows a heat exchange system according to the invention.
[Fig 2] : La figure 2 représente ce système d’échange thermique avec une coupe au droit du deuxième moyen de fixation. [Fig 2]: Figure 2 shows this heat exchange system with a section to the right of the second fixing means.
[033] La figure 1 représente un système d’échange thermique selon un mode particulier de l’invention, non limitatif. Ce système d’échange thermique comprend dix modules de batterie 2 et une unique plaque d’échange thermique 1 par conduction avec chacun des modules de batterie 2. Les modules de batterie 2 sont répartis en un groupe de huit modules 2 et un groupe de deux modules 2, et dans une variante non représentée on a deux plaques thermiques 2 de taille différente, l’une étant en contact thermique avec chacun des modules du groupe de huit modules 2, l’autre étant en contact thermique avec chacun des modules du groupe de deux modules 2. Bien entendu, d’autres configurations sont possibles, avec trois plaques ou plus, et des modules 2 de forme quelconque. [033] Figure 1 shows a heat exchange system according to a particular embodiment of the invention, without limitation. This heat exchange system comprises ten battery modules 2 and a single heat exchange plate 1 by conduction with each of the battery modules 2. The battery modules 2 are divided into a group of eight modules 2 and a group of two. modules 2, and in a variant not shown there are two thermal plates 2 of different size, one being in thermal contact with each of the modules of the group of eight modules 2, the other being in thermal contact with each of the modules of the group of two modules 2. Of course, other configurations are possible, with three or more plates, and modules 2 of any shape.
[034] Les modules 2 sont préférentiellement parallélépipédiques et présentent une face en contact avec la plaque d’échange thermique 1. Dans l’exemple de la figure 1 , cette face est une face de dessous des modules 2 lorsque les modules 2 sont en position d’utilisation dans un véhicule terrestre par exemple, mais en variante cette face peut aussi bien être une face quelconque du module 2. [034] The modules 2 are preferably parallelepipedal and have a face in contact with the heat exchange plate 1. In the example of FIG. 1, this face is a bottom face of the modules 2 when the modules 2 are in position. of use in a land vehicle for example, but as a variant this face can equally well be any face of the module 2.
[035] Entre la face en contact et la plaque thermique 1 , est généralement intercalé une pâte thermique ou un tapis thermique 12 (voir figure 2) favorisant l’échange thermique par conduction entre le module 2 et la plaque 1 en comblant des aspérités ou des vides créés par les dispersions de fabrication des modules 2 ou des plaques 1. [035] Between the face in contact and the thermal plate 1, is generally interposed a thermal paste or a thermal mat 12 (see Figure 2) promoting heat exchange by conduction between the module 2 and the plate 1 by filling in asperities or voids created by manufacturing dispersions of modules 2 or plates 1.
[036] L’échange thermique par conduction entre le module 2 et la plaque 1 est un flux thermique envisagé dans les deux sens possibles : la chaleur allant du module 2 vers la plaque 1 pour un refroidissement du module 2 ou, à l’inverse, allant de la plaque 1 vers le module 2 pour un réchauffement du module 2. [036] The heat exchange by conduction between the module 2 and the plate 1 is a thermal flow considered in both possible directions: the heat going from the module 2 to the plate 1 for cooling of the module 2 or, conversely , going from plate 1 to module 2 for heating of module 2.
[037] Un réseau de conduites de fluide caloporteur (non représenté) relie les plaques 1 entre-elles, ce fluide caloporteur transportant les calories vers un échangeur (non représenté) par exemple, un échangeur air / fluide caloporteur. [037] A network of heat transfer fluid pipes (not shown) connects the plates 1 together, this heat transfer fluid transporting the calories to an exchanger (not shown) for example, an air / heat transfer fluid exchanger.
[038] En variante, le fluide caloporteur est remplacé par un gaz, ou un fluide à changement de phase. [039] La figure 2 illustre la plaque d’échange thermique 1 en contact thermique avec la face du module 2. Cette plaque 1 comprend une plaque de base 3 et une plaque de contact thermique 4 en contact avec le module de batterie 2 et fixée à la plaque de base 3, par exemple par sertissage ou collage ou vissage. La plaque de base 3 comprend un premier moyen de fixation 6 de la plaque d’échange thermique 1 sur un support (non représenté). La plaque de base 3 comprend un deuxième moyen de fixation 7 de la plaque d’échange thermique 1 contre le module de batterie 2. Ce deuxième moyen de fixation 7 est distinct du premier moyen de fixation 6. [038] As a variant, the heat transfer fluid is replaced by a gas, or a phase change fluid. [039] Figure 2 illustrates the heat exchange plate 1 in thermal contact with the face of the module 2. This plate 1 comprises a base plate 3 and a thermal contact plate 4 in contact with the battery module 2 and fixed. to the base plate 3, for example by crimping or gluing or screwing. The base plate 3 comprises a first fixing means 6 of the heat exchange plate 1 on a support (not shown). The base plate 3 comprises a second fixing means 7 of the heat exchange plate 1 against the battery module 2. This second fixing means 7 is separate from the first fixing means 6.
[040] La plaque de base 3 est en matière plastique, par exemple en plastique injecté. En variante, la matière plastique comprend une charge. [040] The base plate 3 is made of plastic, for example injected plastic. Alternatively, the plastic material includes a filler.
[041] Le premier moyen de fixation 6 ou le deuxième moyen de fixation 7 comprennent un insert métallique 10, 8 dans la matière de la plaque de base 3, cet insert métallique 10, 8 ayant un alésage conformé pour recevoir une vis (non représentée). Dans l’exemple illustré, l’insert 10 du premier moyen de fixation 6, dit premier insert 10, est une entretoise ayant un alésage central lisse traversé par une première vis dont l’extrémité filetée se prend dans un trou fileté du support, chaque extrémité de l’entretoise affleurant la surface externe de la plaque de base 3 de sorte à ce que l’entretoise reprenne l’intégralité de l’effort de serrage entre la tête de la première vis et le support. L’insert 8 du deuxième moyen de fixation 7, dit deuxième insert 8, présente un alésage central fileté en prise avec l’extrémité filetée d’une deuxième vis, cette deuxième vis traversant un alésage lisse 14 du module 2, la tête de la deuxième vis serrant le module de batterie 2 contre la plaque d’échange thermique 1 sans risque de dégrader le filetage du deuxième l’insert 8, ce dernier étant métallique. [041] The first fixing means 6 or the second fixing means 7 comprise a metal insert 10, 8 in the material of the base plate 3, this metal insert 10, 8 having a bore shaped to receive a screw (not shown ). In the example illustrated, the insert 10 of the first fixing means 6, called the first insert 10, is a spacer having a smooth central bore through which a first screw passes the threaded end of which is caught in a threaded hole in the support, each end of the spacer flush with the outer surface of the base plate 3 so that the spacer takes up all of the clamping force between the head of the first screw and the support. The insert 8 of the second fixing means 7, called the second insert 8, has a threaded central bore engaged with the threaded end of a second screw, this second screw passing through a smooth bore 14 of the module 2, the head of the second screw tightening the battery module 2 against the heat exchange plate 1 without risk of damaging the thread of the second insert 8, the latter being metallic.
[042] Le premier insert 10 et le deuxième insert 8 sont par exemple surmoulé par la plaque de base 3. En variante, ces inserts 10, 8 sont vissés, collés, ou sertis dans la plaque de base 3. [042] The first insert 10 and the second insert 8 are for example overmolded by the base plate 3. As a variant, these inserts 10, 8 are screwed, glued, or crimped into the base plate 3.
[043] On notera que les premier et deuxième inserts 10, 8 sont disposés dans l’épaisseur d’une nervure 13 de la plaque de base 3, pour favoriser l’adhérence entre les inserts 10, 8 et la plaque de base 3. Cette nervure 13 est idéalement disposée partiellement ou en totalité sur la longueur d’un des quatre côtés de la plaque de base 3, idéalement sur le côté le plus long de sorte à rigidifier d’avantage la plaque de base 3. Dans l’exemple illustré, une seule première nervure 13 est visible, mais on comprendra qu’une deuxième nervure 13 est disposée parallèlement à la première, sur le côté opposé de la plaque de base 3, cette deuxième nervure 13 intégrant également des premier et deuxième moyens de fixation 6, 7. D’autres géométries des nervures 13 et plaque de base 3 sont envisageables, notamment lorsque les modules de batterie 2 ne sont pas parallélépipédiques, par exemple cylindriques ou à plans brisés pour s’adapter aux interfaces de la structure du véhicule. [043] It will be noted that the first and second inserts 10, 8 are arranged in the thickness of a rib 13 of the base plate 3, to promote adhesion between the inserts 10, 8 and the base plate 3. This rib 13 is ideally disposed partially or entirely along the length of one of the four sides of the base plate 3, ideally on the longer side so as to further stiffen the base plate 3. In the example illustrated, only one first rib 13 is visible, but it will be understood that a second rib 13 is arranged parallel to the first, on the opposite side of the base plate 3, this second rib 13 also incorporating first and second means of fixing 6, 7. Other geometries of the ribs 13 and base plate 3 can be envisaged, in particular when the battery modules 2 are not parallelepipedal, for example cylindrical or with broken planes to adapt to the interfaces of the vehicle structure .
[044] Selon le mode de réalisation illustré sur la figure 2, la plaque de base 3 et la plaque de contact thermique 4 forment une cavité 5 entre-elles parcourue par le fluide caloporteur. En outre, la plaque de base 3 comprend, dans son épaisseur, un évidement 11 parcouru par le fluide caloporteur, la cavité 5 formant un premier niveau de circulation du fluide caloporteur, et l’évidement 11 formant un deuxième niveau de circulation de ce fluide caloporteur. [044] According to the embodiment illustrated in Figure 2, the base plate 3 and the thermal contact plate 4 form a cavity 5 between them traversed by the heat transfer fluid. In addition, the base plate 3 comprises, in its thickness, a recess 11 through which the heat transfer fluid passes, the cavity 5 forming a first level of circulation of the heat transfer fluid, and the recess 11 forming a second level of circulation of this fluid. coolant.
[045] Le premier niveau et le deuxième niveau sont par exemple fluidiquement connectés en série, mais en variante le premier niveau et le deuxième niveau sont fluidiquement connectés en parallèle. [045] The first level and the second level are for example fluidly connected in series, but as a variant the first level and the second level are fluidically connected in parallel.
[046] Ces niveaux, ou étages, sont superposés l’un sur l’autre dans l’épaisseur de la plaque d’échange thermique 1. Le Fluide caloporteur a un parcourt dans la cavité 5 qui est fonction de zones du module de batterie 2 à refroidir, ce parcourt 16, 17 pouvant être par exemple rectiligne dans plusieurs canaux parallèles 16, 17 ou en forme de labyrinthe ou de serpentins imbriqués ou non. Ces canaux 16, 17 illustrés en figure 2, sont formés par exemple par une cloison 15 issue par moulage de la plaque de base 3 et qui vient en appui contre la plaque de contact thermique 4, tout comme le parcourt d’une manière générale. [046] These levels, or stages, are superimposed one on top of the other in the thickness of the heat exchange plate 1. The heat transfer fluid travels through the cavity 5 which is a function of zones of the battery module. 2 to be cooled, this runs 16, 17 which may for example be rectilinear in several parallel channels 16, 17 or in the form of a labyrinth or of overlapping or non-overlapping coils. These channels 16, 17 illustrated in FIG. 2, are formed for example by a partition 15 resulting by molding from the base plate 3 and which bears against the thermal contact plate 4, just as it runs through in general.
[047] Le Fluide caloporteur a un parcourt dans l’évidement 11 qui n’est pas fonction de contraintes thermiques vu que la plaque de base 3 est en matière thermo-isolante, mais fonction de la perte de charge du fluide souhaitée, généralement minimale. L’exemple de la figure 2 illustre ce parcourt de façon similaire avec cette même cloison 15 qui se prolonge dans l’évidement 11. [047] The heat transfer fluid travels through the recess 11 which is not a function of thermal stresses since the base plate 3 is made of heat-insulating material, but a function of the pressure drop of the desired fluid, generally minimal. . The example of Figure 2 illustrates this route in a similar fashion with the same partition 15 which extends into the recess 11.
[048] On notera que, avantageusement cette cloison 15 participe à la rigidification de la plaque de base 3, au même titre que la nervure 13. [048] It will be noted that this partition 15 advantageously participates in the stiffening of the base plate 3, in the same way as the rib 13.
[049] La connexion en série des deux niveaux est réalisée, par exemple, par une communication fluidique (non représentée) à une extrémité de la plaque d’échange thermique 1 entre les deux niveaux. Cette connexion peut être interne à la plaque d’échange thermique 1 ou externe en utilisant une conduite du de réseau de conduites de fluide caloporteur. Le fluide caloporteur traverse alors successivement le premier niveau puis le deuxième niveau, le deuxième niveau formant alors un circuit de retour du fluide qui, étant thermiquement isolé, ne perturbe pas le rendement de l’échange thermique se produisant entre le module de batterie 2 et la plaque d’échange thermique 1. Le fluide caloporteur du premier niveau se vide intégralement par le deuxième niveau. [049] The series connection of the two levels is achieved, for example, by fluid communication (not shown) at one end of the heat exchange plate 1 between the two levels. This connection can be internal to the heat exchange plate 1 or external by using a pipe of the network of pipes for heat transfer fluid. The heat transfer fluid then passes successively through the first level then the second level, the second level then forming a fluid return circuit which, being thermally isolated, does not disturb the efficiency of the heat exchange occurring between the battery module 2 and the heat exchange plate 1. The heat transfer fluid from the first level is completely emptied through the second level.
[050] La connexion en parallèle est réalisée, par exemple, en aménageant une entrée du fluide caloporteur dans la plaque d’échange thermique 1 commune aux deux niveaux, chaque niveau ayant une sortie du fluide caloporteur distincte l’une de l’autre. Le fluide sortant du premier niveau pourra alors être canalisé vers l’échangeur air / fluide caloporteur via le réseau de conduites de fluide caloporteur, alors que le fluide sortant du deuxième niveau pourra être canalisé vers une entrée de fluide d’une autre plaque d’échange thermique 1 avant d’être à son tour canalisé vers l’échangeur air / fluide caloporteur. [050] The parallel connection is made, for example, by providing an inlet for the coolant fluid in the heat exchange plate 1 common to the two levels, each level having a separate coolant outlet from one another. The fluid leaving the first level can then be channeled to the air / heat transfer fluid exchanger via the network of heat transfer fluid pipes, while the fluid leaving the second level can be channeled to a fluid inlet of another plate. heat exchange 1 before being in turn channeled to the air / heat transfer fluid exchanger.
[051] Le deuxième niveau forme alors un circuit canalisant une partie du fluide caloporteur qui, étant thermiquement isolé, ne sera pas réchauffé par le fluide se trouvant dans la cavité 5. Ce deuxième niveau débouchera par exemple dans une cavité et/ou un évidement d’une seconde plaque d’échange thermique via le réseau de conduites de fluide caloporteur. [051] The second level then forms a circuit channeling part of the heat transfer fluid which, being thermally insulated, will not be heated by the fluid located in the cavity 5. This second level will lead, for example, into a cavity and / or a recess. a second heat exchange plate via the network of heat transfer fluid pipes.
[052] De façon non illustrée, un carter confine ce système d’échange thermique, cet ensemble formant alors une batterie, par exemple une batterie de traction d’un véhicule. Le support est par exemple un fond de ce carter. [052] In a manner not illustrated, a casing confines this heat exchange system, this assembly then forming a battery, for example a traction battery of a vehicle. The support is for example a bottom of this casing.
[053] Ce carter isole les modules 2 de tous contacts avec des projections d’eau, et confine tous dégagements gazeux des modules 2 dans l’espace interne de ce carter. [053] This casing isolates the modules 2 from all contact with splashing water, and confines all gaseous emissions from the modules 2 in the internal space of this casing.
[054] Un véhicule, notamment un véhicule électrique ou hybride, comprend avantageusement une telle batterie. [054] A vehicle, in particular an electric or hybrid vehicle, advantageously comprises such a battery.
[055] On notera qu’un procédé d’assemblage d’une telle batterie comprenant successivement une première étape d’assemblage de la plaque d’échange thermique 1 contre le module de batterie 2, et une deuxième étape d’assemblage de cet ensemble sur le fond du carter, est avantageux. Ce procédé permet d’avoir un ensemble module 2 et plaque d’échange thermique 1 préassemblé, par exemple chez un fournisseur, indépendamment du montage de cet ensemble dans la ligne d’assemblage du véhicule intégrant ce carter. Ce procédé permet de faciliter l’assemblage tout en garantissant la qualité de l’assemblage du module 2 sur la plaque 1 en termes de positionnement relatif et de conductivité thermique. La ligne d’assemblage est également moins complexe et les bords de ligne sont moins encombrés tout en ayant une emprise au sol réduite. [055] It will be noted that a method of assembling such a battery successively comprising a first step of assembling the heat exchange plate 1 against the battery module 2, and a second step of assembling this assembly on the bottom of the housing, is advantageous. This process makes it possible to have a module 2 and heat exchange plate 1 assembly pre-assembled, for example from a supplier, independently of the assembly of this assembly in the assembly line of the vehicle incorporating this casing. This process facilitates assembly while ensuring the quality of the assembly of module 2 on plate 1 in terms of relative positioning and thermal conductivity. The assembly line is also less complex and the line edges are less cluttered while having a reduced footprint.
[056] La première étape d’assemblage de la plaque d’échange thermique 1 contre le module de batterie 2 est réalisée par un opérateur ou un moyen d’assemblage automatisé réalisant une première sous-étape de vissage en utilisant le deuxième moyen de fixation 7 qui, dans l’exemple précédemment décrit, comprend la deuxième vis serrant la plaque d’échange thermique 1 contre le module de batterie 2. La deuxième étape d’assemblage de cet ensemble sur le fond du carter est réalisée par un opérateur ou un moyen d’assemblage automatisé réalisant une deuxième sous-étape de vissage en utilisant le premier moyen de fixation 6 qui, dans l’exemple précédemment décrit, comprend la première vis serrant la plaque d’échange thermique 1 contre le fond du carter. [056] The first step of assembling the heat exchange plate 1 against the battery module 2 is carried out by an operator or an assembly means. automated system carrying out a first screwing sub-step using the second fixing means 7 which, in the example described above, comprises the second screw tightening the heat exchange plate 1 against the battery module 2. The second step of assembly of this assembly on the bottom of the casing is carried out by an operator or an automated assembly means performing a second screwing sub-step using the first fixing means 6 which, in the example described above, comprises the first screw tightening the heat exchange plate 1 against the bottom of the housing.

Claims

REVENDICATIONS
1. Système d’échange thermique comprenant un module de batterie (2) et une plaque d’échange thermique (1) par conduction avec le module de batterie (2), cette plaque (1 ) comprenant une plaque de base (3) et une plaque de contact thermique (4) en contact avec le module de batterie (2) et fixée à la plaque de base (3), la plaque de base (3) comprenant un premier moyen de fixation (6) de la plaque d’échange thermique (1) sur un support, caractérisé en ce que la plaque de base (3) comprend un deuxième moyen de fixation (7) de la plaque d’échange thermique (1 ) contre le module de batterie (2), ce deuxième moyen de fixation (7) étant distinct du premier moyen de fixation (6). 1. Heat exchange system comprising a battery module (2) and a heat exchange plate (1) by conduction with the battery module (2), this plate (1) comprising a base plate (3) and a thermal contact plate (4) in contact with the battery module (2) and fixed to the base plate (3), the base plate (3) comprising a first fixing means (6) of the base plate heat exchange (1) on a support, characterized in that the base plate (3) comprises a second fixing means (7) of the heat exchange plate (1) against the battery module (2), this second fixing means (7) being separate from the first fixing means (6).
2. Système d’échange thermique selon la revendication 1 , la plaque de base étant en matière plastique. 2. A heat exchange system according to claim 1, the base plate being made of plastic.
3. Système d’échange thermique selon la revendication 2, la matière plastique comprenant une charge. 3. A heat exchange system according to claim 2, the plastic material comprising a filler.
4. Système d’échange thermique selon la revendication 2 ou 3, le premier moyen de fixation (6) ou le deuxième moyen de fixation (7) comprenant un insert métallique (10, 8) dans la matière de la plaque de base (3), cet insert métallique (10, 8) ayant un alésage conformé pour recevoir une vis. 4. Heat exchange system according to claim 2 or 3, the first fixing means (6) or the second fixing means (7) comprising a metal insert (10, 8) in the material of the base plate (3). ), this metal insert (10, 8) having a bore shaped to receive a screw.
5. Système d’échange thermique (1 ) selon l’une des revendications précédentes, la plaque de base (3) et la plaque de contact thermique (4) formant une cavité (5) entre-elles parcourue par un fluide caloporteur. 5. Heat exchange system (1) according to one of the preceding claims, the base plate (3) and the thermal contact plate (4) forming a cavity (5) between them traversed by a heat transfer fluid.
6. Système d’échange thermique (1) selon la revendication 5, la plaque de base (3) comprenant, dans son épaisseur, un évidement (11) parcouru par le fluide caloporteur, la cavité (5) formant un premier niveau de circulation du fluide caloporteur, et l’évidement (11) formant un deuxième niveau de circulation de ce fluide caloporteur. 6. Heat exchange system (1) according to claim 5, the base plate (3) comprising, in its thickness, a recess (11) through which the heat transfer fluid, the cavity (5) forming a first level of circulation. heat transfer fluid, and the recess (11) forming a second level of circulation of this heat transfer fluid.
7. Système d’échange thermique (1 ) selon la revendication 6, le premier niveau et le deuxième niveau étant fluidiquement connectés en série. 7. Heat exchange system (1) according to claim 6, the first level and the second level being fluidly connected in series.
8. Système d’échange thermique (1 ) selon la revendication 6, le premier niveau et le deuxième niveau étant fluidiquement connectés en parallèle. 8. A heat exchange system (1) according to claim 6, the first level and the second level being fluidly connected in parallel.
9. Batterie comprenant un système d’échange thermique selon l’une des revendications précédentes et un carter confinant le système d’échange thermique, le support étant un fond du carter. 9. Battery comprising a heat exchange system according to one of the preceding claims and a casing confining the heat exchange system, the support being a bottom of the casing.
10. Procédé d’assemblage d’une batterie conforme à la revendication 9, caractérisé en ce qu’il comprend successivement une première étape d’assemblage de la plaque d’échange thermique (1 ) contre le module de batterie (2), et une deuxième étape d’assemblage de cet ensemble sur le fond du carter. 10. A method of assembling a battery according to claim 9, characterized in that it successively comprises a first step of assembling the heat exchange plate (1) against the battery module (2), and a second assembly step of this assembly on the bottom of the casing.
EP20757628.1A 2019-09-20 2020-07-22 Heat exchange plate for a battery Pending EP4032140A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1910397A FR3101140B1 (en) 2019-09-20 2019-09-20 BATTERY HEAT EXCHANGE PLATE
PCT/FR2020/051330 WO2021053277A1 (en) 2019-09-20 2020-07-22 Heat exchange plate for a battery

Publications (1)

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EP4032140A1 true EP4032140A1 (en) 2022-07-27

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EP20757628.1A Pending EP4032140A1 (en) 2019-09-20 2020-07-22 Heat exchange plate for a battery

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EP (1) EP4032140A1 (en)
CN (1) CN114424384A (en)
FR (1) FR3101140B1 (en)
WO (1) WO2021053277A1 (en)

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FR3003938A1 (en) 2013-03-29 2014-10-03 Valeo Systemes Thermiques THERMAL EXCHANGE PLATE FOR THERMAL BATTERY MANAGEMENT AND METHOD OF MANUFACTURING THE SAME.
FR3007896B1 (en) * 2013-06-26 2016-12-16 Valeo Systemes Thermiques BATTERY MODULE FOR ELECTRIC OR HYBRID VEHICLE INTEGRATING A HEAT EXCHANGER
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JP6697332B2 (en) * 2016-06-28 2020-05-20 三洋電機株式会社 Battery system and electric vehicle including battery system
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CN109037854A (en) * 2018-08-09 2018-12-18 江苏卡耐新能源有限公司 A kind of liquid cooling plate, power battery pack arrangement and assembly method

Also Published As

Publication number Publication date
WO2021053277A1 (en) 2021-03-25
FR3101140A1 (en) 2021-03-26
CN114424384A (en) 2022-04-29
FR3101140B1 (en) 2021-09-10

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