WO2019180385A1 - Cooling system for motor vehicle battery cells - Google Patents

Cooling system for motor vehicle battery cells Download PDF

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Publication number
WO2019180385A1
WO2019180385A1 PCT/FR2019/050647 FR2019050647W WO2019180385A1 WO 2019180385 A1 WO2019180385 A1 WO 2019180385A1 FR 2019050647 W FR2019050647 W FR 2019050647W WO 2019180385 A1 WO2019180385 A1 WO 2019180385A1
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WO
WIPO (PCT)
Prior art keywords
channels
series
plate
channel
fluid
Prior art date
Application number
PCT/FR2019/050647
Other languages
French (fr)
Inventor
Yvan Lechat
Jean-Yves Queinnec
Jean Damien MULLER
François Busson
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
Priority to CN201980019505.3A priority Critical patent/CN111919332A/en
Priority to EP19718784.2A priority patent/EP3753066A1/en
Publication of WO2019180385A1 publication Critical patent/WO2019180385A1/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
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • 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 a cooling system of at least one battery or battery cells of a motor vehicle.
  • the invention is particularly applicable for all electric or hybrid automobiles with a battery pack or battery cells.
  • US9761919 discloses an energy storage system comprising multiple cells, each cell having anode and cathode terminals, and there is provided a heat pipe having a flat evaporation surface for cooling the cells.
  • US9638475 discloses a heat exchanger in the form of a cooling element provided with an engagement device formed on or attached to an outer surface of the cooling plate to receive and / or engage a portion of corresponding commitment on a battery unit.
  • the interconnection between the battery unit or cell and the heat exchanger creates a mechanical interlock between the two components which results in improved heat transfer properties between the two components.
  • heat exchangers are known for heat exchangers (radiators, chillers, evaporators, etc.) with a U-shaped fluid circuit, for exchanging heat on each of its faces.
  • the cells each see the same average temperature, but nevertheless have a tube that is hotter than the other, thus creating a thermal gradient that is all the more important as the cells are at the beginning. of the circuit.
  • the cells For cold plates with U-shaped circulation, the cells never have a sufficient diameter to be able to overlap both the cold inlet channel and the hot outlet channel, so that a temperature difference between each cell becomes square.
  • the present invention aims in particular to provide a better temperature homogeneity in the cooling of a set of battery cells.
  • the subject of the invention is thus a battery cell cooling system, this system comprising:
  • a support arranged to receive battery cells, this support being in thermal contact with the coolant
  • the fluid circuit comprises a first series of fluid channels extending in a first plane and a second series of fluid channels extending in a second plane distinct from the first plane, at least one of the channels of fluid the first series connecting to at least one of the channels of the second series by a turning elbow which extends between said two planes so that these two channels form between them an angle less than 90 °, in particular less than 45 ° ° or lower 5 °, in particular these channels form between them an angle of 0 ° in which case these channels are parallel with opposite flow directions.
  • the path of the heat transfer fluid makes it possible to guarantee homogeneous cooling on a mesh of battery cells.
  • the invention makes it possible to have the same cell temperature whatever their position on the exchanger.
  • all the channels of the first series are parallel to each other.
  • all the channels of the second series are parallel to each other.
  • all the channels of the first and second series are all parallel to each other.
  • the turning bends are all on one side of the cooling system.
  • the channels are rectilinear over most of their length, especially over substantially their entire length.
  • the system comprises a channel plate at least partially defining the channels of at least one of the first and second series, in particular the plate at least partially defines the channels of the two series.
  • the channel plate has grooves at least partially defining the channels.
  • the channel plate is made in one piece, in particular aluminum, in particular by stamping.
  • the channel plate has on the upper face a series of grooves to form the channels of the first series and on the underside a series of furrows to form the channels of the second series.
  • all channels are rectilinear, ie the channels do not form coils.
  • the channels extend over a major part of the plate, in particular substantially over the entire length of the plate.
  • the plate comprises alternating embossings so as to form alternating grooves to alternately define the channels on each of the upper and lower faces of the plate.
  • the plate is arranged to define a heat transfer channel supply zone.
  • the plate is arranged to define a fluid evacuation zone of the channels.
  • the supply and discharge zones are on the same side, in particular end, of the channel plate, in particular in the two planes respectively.
  • the supply and discharge zones extend transversely with respect to the channels.
  • the supply and discharge areas are respectively connected to an input and output connectors, these connectors, in particular each formed by a tubing, both connectors extending either on the upper face, or on the lower face, namely on the same side of the plate.
  • one of the connectors extends on the upper face and the other on the underside of the channel plate.
  • the fluid inlet and outlet connectors are substantially in the middle of the channel plate.
  • the plate has a thickness of between 0.5 mm and 1 mm.
  • the channels have a cross section of between 15 mm 2 and 20 mm 2.
  • the channels of the first and second series press the same cross section.
  • the channels are spaced apart from one another regularly.
  • the battery cells have a larger section than the space between a channel of the first series and a channel of the second series, which channels are immediately adjacent.
  • At least some of the battery cell bases, including all bases, are cooled by both a channel of the first series and a channel of the second series.
  • the support for receiving the battery cells is a plate assembled with the channel plate, in particular by soldering.
  • the support plates and channels have substantially the same dimensions and shapes, in particular have straight edges, including being inscribed in a rectangle.
  • the support plate closes channels of one of the series of channels.
  • the input or output connection passes at least partially through the support plate, in particular this plate has an orifice for the passage of a tubing.
  • the support plate is made of aluminum. According to one aspect of the invention, this support plate comprises cells arranged to each receive a battery cell.
  • these cells are arranged in rows parallel to the channels.
  • these cells receive the base of the cells.
  • each battery cell is cylindrical.
  • the cells are at least 200, in particular at least 300, in particular 400.
  • the system comprises a bottom plate arranged to be assembled with the channel plate.
  • this bottom plate is arranged to close the channels of one of the series of channels.
  • the input or output connection passes at least partially through the bottom plate, in particular this plate has an orifice for the passage of a pipe.
  • the channel plate is sandwiched between the cell support plate and the bottom plate, these plates being in particular brazed together.
  • the turning elbow is formed by through apertures in the channel plate which allow the fluid to pass from one side to the other of the channel plate.
  • the support and bottom plates are completely flat without housing or cells for the cylindrical cells.
  • the channels have different widths, in order to adapt to the arrangement of cells which for example have a non-constant pitch.
  • the components are made of plastics and are assembled by bonding, thermal welding, ultrasonic welding or any other means of assembly.
  • only the channel plate is aluminum and the other components are plastic and in particular are assembled together by gluing.
  • the invention allows a junction between channels of the first and second series being by means of a reversal support plate end, said reversal being in the direction of the thickness of the channel plate.
  • the channels allow the heat exchange on the one hand with half of the base of each cylindrical lower face cell, the fluid being in direct contact with the lower plate, and also with the half of the base of each upper face cylindrical cell, the fluid being in indirect contact with the upper support plate via the channel bottom or furrow bottom.
  • FIG. 1 to 7 illustrate, schematically and partially, according to different views, a system according to an example of the invention
  • FIGS. 1 to 7 show a cooling system 1 for battery cells, this system 1 comprising:
  • a support 3 arranged to receive battery cells 4, this support 3 being in thermal contact with the coolant,
  • the fluid circuit 2 comprises a first series of fluid channels 10 extending in a first plane P1 and a second series of fluid channels 20 extending in a second plane P2 distinct from the first plane.
  • the channels 1 1 of the first series 10 are connected to the channels 21 of the second series 20 by turning elbows 30 which extend between said two planes P1 and P2 so that these channels form an angle of 0 ° between them, namely, these channels 1 1 and 21 are parallel to each other and with opposite flow directions.
  • the heat transfer fluid used is preferably glycol water, without limitation of the glycol titer (0% to 100%).
  • the coolant can be chosen from fluids with the designation R134a, R1234yf or R744.
  • the battery cells 2 comprise for example a plurality of lithium-ion (Li-ion) batteries for use in a hybrid vehicle.
  • the plurality of battery cells are Li-ion batteries for use in a battery electric vehicle.
  • the turning bends 30 are all on one side 7 of the cooling system 1, as illustrated in FIG. 3.
  • the channels 1 1 and 21 are rectilinear over substantially their entire length.
  • the system 1 comprises a channel plate 8 defining the channels 1 1 and 21 of the first and second series. 10 and 20.
  • the channel plate 8 has grooves 9 defining the channels 11 and 21, as can be seen in FIGS. 3 and 4.
  • the channel plate 8 is made in one piece, in particular aluminum, in particular by stamping.
  • the channel plate 8 comprises on the upper face 15 a series of grooves 9 to form the channels 1 1 of the first series and on the lower face 25 a series of grooves 9 to form the channels of the second series 21.
  • All channels 1 1 and 21 are rectilinear, ie the channels do not form coils.
  • the channels 1 1 and 21 extend over a major part of the plate 8, substantially over the entire length of the plate 8.
  • the plate 8 is arranged to define a supply zone 31 of the channels 1 1 heat transfer fluid, as shown in Figure 2.
  • the plate 8 is arranged to define a channel fluid evacuation zone 32, as can be seen in FIG. 5.
  • the feed 31 and discharge 32 are on the same right side of the channel plate.
  • the feeding and evacuation zones 31 and 32 of elongate shape, in particular of rectangular shape, extend transversely with respect to the channels 11 and 21.
  • the supply and discharge areas 31 and 32, formed on the plate 8, are respectively connected to an input connector 37 and output (not visible), these connectors, in particular each formed by a tubing, both connectors extending either on the upper face or on the lower face, namely on the same side of the plate.
  • the input connectors 37 and fluid outlet connectors 38 are substantially in the middle of the channel plate 8.
  • the channels of the first and second series have the same cross section and are spaced apart from each other on a regular basis.
  • the battery cells have a larger section than the space between a channel of the first series and a channel of the second series, which channels are immediately adjacent.
  • the battery cell bases 4, in particular all the bases 60, are cooled by both a channel of the first series and a channel of the second series, as illustrated in FIG.
  • the support 40 for receiving the battery cells is a plate assembled with the channel plate 8, in particular solder.
  • the support plates 40 and channel plate 8 have substantially the same dimensions and shapes, especially have straight edges, including being inscribed in a rectangle.
  • the support plate 40 closes channels 1 1 and 21.
  • the input or output connection goes through this support plate 40, in particular this plate has an orifice 41 for the passage of a pipe 37, as can be seen in FIG. 9.
  • the support plate 40 is made of aluminum and comprises cells 45 arranged to receive each a battery cell 4.
  • These cells 45 are arranged in rows parallel to the channels.
  • Each battery cell is cylindrical.
  • the system comprises a bottom plate 50 arranged to be assembled with the channel plate 8.
  • This bottom plate 50 is arranged to close the channels of one of the series of channels.
  • the turning elbows are formed by through apertures 55 in the channel plate 8 which allow the fluid to pass from one face to the other of the channel plate 8 and turn around in the other plane.
  • Channels 1 and 21 are alternately arranged.
  • the plate 8 comprises alternating embossings so as to form alternating grooves 9 to alternately define the channels 1 1 and 21 on each of the upper and lower faces of the plate 8.
  • the channels 1 1 of the upper face open at one end on the through openings 55, each opening 55 distributing the fluid in the channel 1 1 which arrives at this opening 55 to two channels 21 of the other side of the plate.
  • each channel 21 of the lower face communicates with two channels of the upper face.
  • the invention makes it possible to guarantee homogeneous cooling on a mesh of cylindrical cells for the field of electric motor vehicles.
  • the bottom plate 50 arranged to be in contact with a set of additional battery cells.
  • a first group of battery cells is in contact with the upper face and a second group of cells is in contact with the other side.
  • the plates are interposed between two sets of cells.
  • the bottom plate 50 may be similar to the support plate
  • each cell sees, in thermal terms, the "cold" channel and the "hot” channel of the coolant, so that the average temperature of the fluid seen by each cell is the same.
  • the heat exchange may, if necessary, be on each side of the plate, insofar as there is need for cooling on both sides of the exchanger.
  • the size of the channels is optimized.
  • the cooling channels provide heat exchange on the one hand with half of the base 60 of each upper face cylindrical cell, the fluid being in direct contact with the upper support plate 40, but also with half of the base 60 of each lower-face cylindrical cell, the fluid being in indirect contact with the lower plate via the channel bottom.
  • the channels 1 1 are alternately arranged with the channels 21, which ensure the return of the fluid against the current.
  • the channels 1 1 and 21 have the same width in this embodiment, said width being a function of the pitch between each cell.
  • the channels 21 allow heat exchange on the one hand with half of the base 60 of each cylindrical cell bottom face, the fluid being in direct contact with the lower plate 50, but also with half of the base of each upper-face cylindrical cell, the fluid being in indirect contact with the upper support plate 8 via the channel bottom or furrow bottom 9.
  • the plates 40 and 50 close the fluid circuit.
  • the channels 1 1 and 21 each extend between the supply and discharge areas. In particular they are separated from each other outside the areas of supply and discharge. Especially these channels 1 1 and 21 do not intersect outside the areas of supply and discharge.

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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)

Abstract

The invention relates to a cooling system (1) for battery cells, said system comprising: a heat transfer fluid circuit, and a support arranged to receive battery cells, said support being in thermal contact with the heat transfer fluid. According to the invention, the fluid circuit comprises a first series of fluid channels extending in a first plane and a second series of fluid channels extending in a second plane separate from the first plane, at least one of the channels of the first series being connected to at least one of the channels of the second series by a return bend which extends between the two planes, such that the two channels form an angle of less than 90° therebetween, in particular less than 45° or less than 5°, and, in particular the channels form an angle of 0° therebetween, in which case said channels are parallel with the opposite flow directions.

Description

Système de refroidissement de cellules de batterie de véhicule automobile  Motor vehicle battery cell cooling system
La présente invention concerne un système de refroidissement d’au moins une batterie ou cellules de batterie de véhicule automobile. The present invention relates to a cooling system of at least one battery or battery cells of a motor vehicle.
L’invention est notamment applicable pour toutes les automobiles électriques ou hybrides avec un pack de batteries ou cellules de batterie.  The invention is particularly applicable for all electric or hybrid automobiles with a battery pack or battery cells.
Le brevet US9761919 décrit un système de stockage d'énergie comprenant des cellules multiples, chaque cellule ayant des bornes d'anode et de cathode, et il est prévu un caloduc ayant une surface d'évaporation plate pour refroidir les cellules.  US9761919 discloses an energy storage system comprising multiple cells, each cell having anode and cathode terminals, and there is provided a heat pipe having a flat evaporation surface for cooling the cells.
Le brevet US9638475 décrit un échangeur de chaleur se présentant sous la forme d'un élément de refroidissement muni d'un dispositif d'engagement formé sur ou fixé à une surface extérieure de la plaque de refroidissement pour recevoir et / ou engager une partie d'engagement correspondante sur une unité de batterie. L'interconnexion entre l'unité de batterie ou cellule, et l'échangeur de chaleur crée un verrouillage mécanique entre les deux composants qui résulte en des propriétés de transfert de chaleur améliorées entre les deux composants.  US9638475 discloses a heat exchanger in the form of a cooling element provided with an engagement device formed on or attached to an outer surface of the cooling plate to receive and / or engage a portion of corresponding commitment on a battery unit. The interconnection between the battery unit or cell and the heat exchanger creates a mechanical interlock between the two components which results in improved heat transfer properties between the two components.
De manière plus générale, on connaît pour les échangeurs thermiques (radiateurs, chillers, évaporateurs...) des plaques pour fluide caloporteur avec un circuit de fluide en U, permettant d’échanger de la chaleur sur chacune de ses faces.  More generally, heat exchangers are known for heat exchangers (radiators, chillers, evaporators, etc.) with a U-shaped fluid circuit, for exchanging heat on each of its faces.
En particulier, deux solutions existent pour refroidir des cellules cylindriques : - Un refroidissement par leur face latérale, au moyen de tubes extrudés corrugués serpentant entre les rangés de cellules, avec une circulation en U préférentiellement au moyen de 2 tubes,In particular, two solutions exist for cooling cylindrical cells: - A cooling by their lateral face, by means of corrugated extruded tubes snaking between the rows of cells, with a U-shaped circulation preferentially by means of 2 tubes,
- Un refroidissement par le fond des cellules, au moyen d’une plaque froide ayant une circulation en U ou en I. - Cooling by the bottom of the cells, by means of a cold plate having a circulation in U or I.
Dans le cas des tubes corrugués avec circulation en U, les cellules voient chacune la même température moyenne, mais présentent malgré tout un tube plus chaud que l’autre, créant ainsi un gradient thermique d’autant plus important que les cellules se trouvent au début du circuit. Pour les plaques froides avec circulation en U, les cellules n’ont jamais un diamètre suffisant pour pouvoir chevaucher à la fois le canal d’entrée froid et celui de sortie chaud, de sorte qu’une différence de température entre chaque cellule se met en place. In the case of corrugated tubes with U-shaped circulation, the cells each see the same average temperature, but nevertheless have a tube that is hotter than the other, thus creating a thermal gradient that is all the more important as the cells are at the beginning. of the circuit. For cold plates with U-shaped circulation, the cells never have a sufficient diameter to be able to overlap both the cold inlet channel and the hot outlet channel, so that a temperature difference between each cell becomes square.
La présente invention vise notamment à proposer une meilleure homogénéité de température dans le refroidissement d’un ensemble de cellules de batterie.  The present invention aims in particular to provide a better temperature homogeneity in the cooling of a set of battery cells.
L’invention a ainsi pour objet un système de refroidissement de cellules de batterie, ce système comportant :  The subject of the invention is thus a battery cell cooling system, this system comprising:
- un circuit de fluide caloporteur,  a heat transfer fluid circuit,
un support agencé pour recevoir des cellules de batterie, ce support étant en contact thermique avec le fluide caloporteur,  a support arranged to receive battery cells, this support being in thermal contact with the coolant,
système dans lequel le circuit de fluide comprend une première série de canaux de fluide s’étendant dans un premier plan et une deuxième série de canaux de fluide s’étendant dans un deuxième plan distinct du premier plan, l’un au moins des canaux de la première série se raccordant à l’un au moins des canaux de la deuxième série par un coude de retournement qui s’étend entre lesdits deux plans de sorte que ces deux canaux forment entre eux un angle inférieur à 90°, notamment inférieur à 45° ou inférieur 5°, notamment ces canaux forment entre eux un angle de 0° auquel cas ces canaux sont parallèles avec des sens d’écoulement opposés. system in which the fluid circuit comprises a first series of fluid channels extending in a first plane and a second series of fluid channels extending in a second plane distinct from the first plane, at least one of the channels of fluid the first series connecting to at least one of the channels of the second series by a turning elbow which extends between said two planes so that these two channels form between them an angle less than 90 °, in particular less than 45 ° ° or lower 5 °, in particular these channels form between them an angle of 0 ° in which case these channels are parallel with opposite flow directions.
Grâce à l’invention, du fait de l’aller retour des canaux; le trajet du fluide caloporteur permet de garantir un refroidissement homogène sur un maillage de cellules de batterie.  Thanks to the invention, because of the return of the channels; the path of the heat transfer fluid makes it possible to guarantee homogeneous cooling on a mesh of battery cells.
L’invention permet d’avoir une même température de cellule quelque soit leur position sur l’échangeur.  The invention makes it possible to have the same cell temperature whatever their position on the exchanger.
Selon un aspect de l’invention, tous les canaux de la première série sont parallèles entre eux.  According to one aspect of the invention, all the channels of the first series are parallel to each other.
Selon un aspect de l’invention, tous les canaux de la deuxième série sont parallèles entre eux.  According to one aspect of the invention, all the channels of the second series are parallel to each other.
Selon un aspect de l’invention, tous les canaux des première et deuxième séries sont tous parallèles entre eux.  According to one aspect of the invention, all the channels of the first and second series are all parallel to each other.
Selon un aspect de l’invention, les coudes de retournement sont tous sur un côté du système de refroidissement.  According to one aspect of the invention, the turning bends are all on one side of the cooling system.
Selon un aspect de l’invention, les canaux sont rectilignes sur la majeure partir de leur longueur, notamment sur sensiblement toute leur longueur.  According to one aspect of the invention, the channels are rectilinear over most of their length, especially over substantially their entire length.
Selon un aspect de l’invention, le système comporte une plaque de canaux définissant au moins partiellement les canaux de l’une au moins des première et deuxième séries, notamment la plaque définit au moins partiellement les canaux des deux séries.  According to one aspect of the invention, the system comprises a channel plate at least partially defining the channels of at least one of the first and second series, in particular the plate at least partially defines the channels of the two series.
Selon un aspect de l’invention, la plaque de canaux comporte des sillons définissant au moins partiellement les canaux.  According to one aspect of the invention, the channel plate has grooves at least partially defining the channels.
Selon un aspect de l’invention, la plaque de canaux est réalisée d’un seul tenant, notamment en aluminium, notamment par emboutissage.  According to one aspect of the invention, the channel plate is made in one piece, in particular aluminum, in particular by stamping.
Selon un aspect de l’invention, la plaque de canaux comporte sur la face supérieure une série de sillons pour former les canaux de la première série et sur la face inférieure une série de sillons pour former les canaux de la deuxième série. According to one aspect of the invention, the channel plate has on the upper face a series of grooves to form the channels of the first series and on the underside a series of furrows to form the channels of the second series.
Selon un aspect de l’invention, tous les canaux sont rectilignes, à savoir les canaux ne forment pas de serpentins. Notamment les canaux s’étendent sur une majeure partie de la plaque, notamment sensiblement sur toute la longueur de la plaque.  According to one aspect of the invention, all channels are rectilinear, ie the channels do not form coils. In particular, the channels extend over a major part of the plate, in particular substantially over the entire length of the plate.
Selon un aspect de l’invention, la plaque comporte des embossages alternés de manière à former des sillons alternés pour définir alternativement les canaux sur chacune des faces supérieure et inférieure de la plaque.  According to one aspect of the invention, the plate comprises alternating embossings so as to form alternating grooves to alternately define the channels on each of the upper and lower faces of the plate.
Selon un aspect de l’invention, la plaque est agencée pour définir une zone d’alimentation des canaux en fluide caloporteur.  According to one aspect of the invention, the plate is arranged to define a heat transfer channel supply zone.
Selon un aspect de l’invention, la plaque est agencée pour définir une zone d’évacuation de fluide des canaux.  According to one aspect of the invention, the plate is arranged to define a fluid evacuation zone of the channels.
Selon un aspect de l’invention, les zones d’alimentation et d’évacuation sont sur un même coté, notamment extrémité, de la plaque de canaux, notamment respectivement dans les deux plans.  According to one aspect of the invention, the supply and discharge zones are on the same side, in particular end, of the channel plate, in particular in the two planes respectively.
Selon un aspect de l’invention, les zones d’alimentation et d’évacuation s’étendent transversalement par rapport aux canaux.  According to one aspect of the invention, the supply and discharge zones extend transversely with respect to the channels.
Selon un aspect de l’invention, les zones d’alimentation et d’évacuation se raccordent respectivement à une connectique d’entrée et de sortie, ces connectiques, notamment formées chacune par une tubulure, toutes les deux connectiques s’étendant soit sur la face supérieure, soit sur la face inférieur, à savoir d’un même coté de la plaque.  According to one aspect of the invention, the supply and discharge areas are respectively connected to an input and output connectors, these connectors, in particular each formed by a tubing, both connectors extending either on the upper face, or on the lower face, namely on the same side of the plate.
En variante, l’une des connectiques s’étend sur la face supérieure et l’autre sur la face inférieure de la plaque de canaux.  Alternatively, one of the connectors extends on the upper face and the other on the underside of the channel plate.
Selon un aspect de l’invention, les connectiques d’entrée et de sortie de fluide sont sensiblement au milieu de la plaque de canaux. Selon un aspect de l’invention, la plaque présente une épaisseur comprise entre 0.5 mm et 1 mm. According to one aspect of the invention, the fluid inlet and outlet connectors are substantially in the middle of the channel plate. According to one aspect of the invention, the plate has a thickness of between 0.5 mm and 1 mm.
Selon un aspect de l’invention, les canaux présentent une section transversale comprise entre 15 mm2 et 20 mm2.  According to one aspect of the invention, the channels have a cross section of between 15 mm 2 and 20 mm 2.
Selon un aspect de l’invention, les canaux des première et deuxième séries pressentent la même section transversale.  According to one aspect of the invention, the channels of the first and second series press the same cross section.
Selon un aspect de l’invention, les canaux sont espacées les un des autres de manière régulière.  According to one aspect of the invention, the channels are spaced apart from one another regularly.
Selon un aspect de l’invention, les cellules de batterie présentent une section plus grande que l’espace entre un canal de la première série et un canal de la deuxième série, canaux qui sont immédiatement voisins.  According to one aspect of the invention, the battery cells have a larger section than the space between a channel of the first series and a channel of the second series, which channels are immediately adjacent.
Selon un aspect de l’invention, au moins certaines des bases de cellules de batterie, notamment toutes les bases, sont refroidies par à la fois un canal de la première série et un canal de la deuxième série.  According to one aspect of the invention, at least some of the battery cell bases, including all bases, are cooled by both a channel of the first series and a channel of the second series.
Selon un aspect de l’invention, le support pour recevoir les cellules de batterie est une plaque assemblée avec la plaque de canaux, notamment par brasage.  According to one aspect of the invention, the support for receiving the battery cells is a plate assembled with the channel plate, in particular by soldering.
Selon un aspect de l’invention, les plaques de support et de canaux ont sensiblement les mêmes dimensions et formes, notamment présentent des bords droits, notamment en étant inscrit dans un rectangle.  According to one aspect of the invention, the support plates and channels have substantially the same dimensions and shapes, in particular have straight edges, including being inscribed in a rectangle.
Selon un aspect de l’invention, la plaque de support ferme des canaux de l’une des séries de canaux.  According to one aspect of the invention, the support plate closes channels of one of the series of channels.
Selon un aspect de l’invention, la connectique d’entrée ou de sortie passe au moins partiellement par cette plaque de support, notamment cette plaque comporte un orifice pour le passage d’une tubulure.  According to one aspect of the invention, the input or output connection passes at least partially through the support plate, in particular this plate has an orifice for the passage of a tubing.
Selon un aspect de l’invention, la plaque de support est réalisée en aluminium. Selon un aspect de l’invention, cette plaque de support comporte des alvéoles agencées pour recevoir chacune une cellule de batterie. According to one aspect of the invention, the support plate is made of aluminum. According to one aspect of the invention, this support plate comprises cells arranged to each receive a battery cell.
Selon un aspect de l’invention, ces alvéoles sont disposées en rangées parallèles aux canaux.  According to one aspect of the invention, these cells are arranged in rows parallel to the channels.
Selon un aspect de l’invention, ces alvéoles reçoivent la base des cellules.  According to one aspect of the invention, these cells receive the base of the cells.
Selon un aspect de l’invention, chaque cellule de batterie est cylindrique.  According to one aspect of the invention, each battery cell is cylindrical.
Selon un aspect de l’invention, les cellules sont au nombre au moins de 200, notamment au moins 300, notamment 400.  According to one aspect of the invention, the cells are at least 200, in particular at least 300, in particular 400.
Selon un aspect de l’invention, le système comporte une plaque de fond agencée pour être assemblée avec la plaque de canaux.  According to one aspect of the invention, the system comprises a bottom plate arranged to be assembled with the channel plate.
Selon un aspect de l’invention, cette plaque de fond est agencée pour fermer les canaux de l'une des séries de canaux.  According to one aspect of the invention, this bottom plate is arranged to close the channels of one of the series of channels.
Selon un aspect de l’invention, la connectique d’entrée ou de sortie passe au moins partiellement par cette plaque de fond, notamment cette plaque comporte un orifice pour le passage d’une tubulure.  According to one aspect of the invention, the input or output connection passes at least partially through the bottom plate, in particular this plate has an orifice for the passage of a pipe.
Selon un aspect de l’invention, la plaque de canaux est prise en sandwich entre la plaque de support des cellules et la plaque de fond, ces plaques étant notamment brasées entre elles.  According to one aspect of the invention, the channel plate is sandwiched between the cell support plate and the bottom plate, these plates being in particular brazed together.
Selon un aspect de l’invention, le coude de retournement est formé par des ouvertures traversantes dans la plaque de canaux qui permettent au fluide de passer d’une face à l’autre de la plaque de canaux.  According to one aspect of the invention, the turning elbow is formed by through apertures in the channel plate which allow the fluid to pass from one side to the other of the channel plate.
Dans une variante de l’invention, les plaques de support et de fond sont totalement planes sans logement ou alvéoles pour les cellules cylindriques. Selon un aspect de l’invention, les canaux possèdent des largeurs différentes, afin de s’adapter à la disposition des cellules qui par exemple ont un pas non constant. In a variant of the invention, the support and bottom plates are completely flat without housing or cells for the cylindrical cells. According to one aspect of the invention, the channels have different widths, in order to adapt to the arrangement of cells which for example have a non-constant pitch.
Selon un aspect de l’invention, les composants sont en plastiques et sont assemblés par collage, soudage thermique, soudage ultrason ou tout autre moyen d’assemblage.  According to one aspect of the invention, the components are made of plastics and are assembled by bonding, thermal welding, ultrasonic welding or any other means of assembly.
Selon un aspect de l’invention, seule la plaque de canaux est en aluminium et les autres composants sont en plastique et notamment sont assemblés entre eux par collage.  According to one aspect of the invention, only the channel plate is aluminum and the other components are plastic and in particular are assembled together by gluing.
L’invention permet une jonction entre canaux des première et deuxième séries se faisant au moyen d’un retournement en bout de plaque de support, ledit retournement se faisant suivant la direction de l’épaisseur de la plaque de canaux.  The invention allows a junction between channels of the first and second series being by means of a reversal support plate end, said reversal being in the direction of the thickness of the channel plate.
Avantageusement sur la face inférieure de la plaque de canaux, les canaux permettent l’échange thermique d’une part avec la moitié de la base de chaque cellule cylindrique face inférieure, le fluide étant en contact direct avec la plaque inférieure, et également avec la moitié de la base de chaque cellule cylindrique face supérieure, le fluide étant en contact indirect avec la plaque de support supérieure par l’intermédiaire du fond de canal ou fond de sillon.  Advantageously on the lower face of the channel plate, the channels allow the heat exchange on the one hand with half of the base of each cylindrical lower face cell, the fluid being in direct contact with the lower plate, and also with the half of the base of each upper face cylindrical cell, the fluid being in indirect contact with the upper support plate via the channel bottom or furrow bottom.
L’invention sera mieux comprise et d’autres détails, caractéristiques et avantages de l’invention apparaîtront à la lecture de la description suivante faite à titre d’exemples non limitatifs en référence au dessin annexé dans lequel : The invention will be better understood and other details, characteristics and advantages of the invention will become apparent on reading the following description given by way of nonlimiting example with reference to the appended drawing in which:
- les figures 1 à 7 illustrent, schématiquement et partiellement, suivant différentes vues, un système selon un exemple de l’invention,  - Figures 1 to 7 illustrate, schematically and partially, according to different views, a system according to an example of the invention,
- les figures 8 et 9 illustrent, schématiquement et partiellement, un système de refroidissement selon un autre exemple de l’invention. On a décrit sur les figures 1 à 7 un système de refroidissement 1 de cellules de batterie, ce système 1 comportant : - Figures 8 and 9 illustrate, schematically and partially, a cooling system according to another example of the invention. FIGS. 1 to 7 show a cooling system 1 for battery cells, this system 1 comprising:
un circuit 2 de fluide caloporteur,  a heat transfer fluid circuit 2,
un support 3 agencé pour recevoir des cellules 4 de batterie, ce support 3 étant en contact thermique avec le fluide caloporteur,  a support 3 arranged to receive battery cells 4, this support 3 being in thermal contact with the coolant,
système dans lequel le circuit de fluide 2 comprend une première série de canaux de fluide 10 s’étendant dans un premier plan P1 et une deuxième série 20 de canaux de fluide s’étendant dans un deuxième plan P2 distinct du premier plan. system in which the fluid circuit 2 comprises a first series of fluid channels 10 extending in a first plane P1 and a second series of fluid channels 20 extending in a second plane P2 distinct from the first plane.
Les canaux 1 1 de la première série 10 se raccordent aux canaux 21 de la deuxième série 20 par des coudes de retournement 30 qui s’étendent entre lesdits deux plans P1 et P2 de sorte que ces canaux forment entre eux un angle de 0°, à savoir ces canaux 1 1 et 21 sont parallèles entre eux et avec des sens d’écoulement opposés.  The channels 1 1 of the first series 10 are connected to the channels 21 of the second series 20 by turning elbows 30 which extend between said two planes P1 and P2 so that these channels form an angle of 0 ° between them, namely, these channels 1 1 and 21 are parallel to each other and with opposite flow directions.
Le fluide caloporteur utilisé est préférentiellement de l’eau glycolée, sans limitation du titre de glycol (0% à 100%). Alternativement le fluide caloporteur peut être choisi parmi les fluides d’appellation R134a, R1234yf ou R744.  The heat transfer fluid used is preferably glycol water, without limitation of the glycol titer (0% to 100%). Alternatively, the coolant can be chosen from fluids with the designation R134a, R1234yf or R744.
Les cellules de batterie 2 comprennent par exemple une pluralité de batteries au lithium-ion (Li-ion) pour une utilisation dans un véhicule hybride. Dans un autre mode de réalisation, la pluralité de cellules de batterie sont des batteries Li-ion pour une utilisation dans un véhicule électrique à batterie.  The battery cells 2 comprise for example a plurality of lithium-ion (Li-ion) batteries for use in a hybrid vehicle. In another embodiment, the plurality of battery cells are Li-ion batteries for use in a battery electric vehicle.
Comme on peut le voir sur les figures, tous les canaux 1 1 et 21 des première et deuxième séries 10 et 20 sont tous parallèles entre eux.  As can be seen in the figures, all the channels 1 1 and 21 of the first and second series 10 and 20 are all parallel to each other.
Les coudes de retournement 30 sont tous sur un côté 7 du système de refroidissement 1 , comme illustré sur la figure 3.  The turning bends 30 are all on one side 7 of the cooling system 1, as illustrated in FIG. 3.
Les canaux 1 1 et 21 sont rectilignes sur sensiblement toute leur longueur. Le système 1 comporte une plaque de canaux 8 définissant les canaux 1 1 et 21 des première et deuxième séries. 10 et 20. The channels 1 1 and 21 are rectilinear over substantially their entire length. The system 1 comprises a channel plate 8 defining the channels 1 1 and 21 of the first and second series. 10 and 20.
La plaque de canaux 8 comporte des sillons 9 définissant les canaux 11 et 21 , comme on peut le voir sur les figures 3 et 4.  The channel plate 8 has grooves 9 defining the channels 11 and 21, as can be seen in FIGS. 3 and 4.
La plaque de canaux 8 est réalisée d’un seul tenant, notamment en aluminium, notamment par emboutissage.  The channel plate 8 is made in one piece, in particular aluminum, in particular by stamping.
La plaque de canaux 8 comporte sur la face supérieure 15 une série de sillons 9 pour former les canaux 1 1 de la première série et sur la face inférieure 25 une série de sillons 9 pour former les canaux de la deuxième série 21.  The channel plate 8 comprises on the upper face 15 a series of grooves 9 to form the channels 1 1 of the first series and on the lower face 25 a series of grooves 9 to form the channels of the second series 21.
Tous les canaux 1 1 et 21 sont rectilignes, à savoir les canaux ne forment pas de serpentins. Notamment les canaux 1 1 et 21 s’étendent sur une majeure partie de la plaque 8, sensiblement sur toute la longueur de la plaque 8.  All channels 1 1 and 21 are rectilinear, ie the channels do not form coils. In particular the channels 1 1 and 21 extend over a major part of the plate 8, substantially over the entire length of the plate 8.
La plaque 8 est agencée pour définir une zone d’alimentation 31 des canaux 1 1 en fluide caloporteur, comme visible sur la figure 2.  The plate 8 is arranged to define a supply zone 31 of the channels 1 1 heat transfer fluid, as shown in Figure 2.
La plaque 8 est agencée pour définir une zone d’évacuation 32 de fluide des canaux, comme visible sur la figure 5.  The plate 8 is arranged to define a channel fluid evacuation zone 32, as can be seen in FIG. 5.
Les zones d’alimentation 31 et d’évacuation 32 sont sur un même coté droit 35 de la plaque de canaux.  The feed 31 and discharge 32 are on the same right side of the channel plate.
Les zones d’alimentation et d’évacuation 31 et 32, de forme allongée, notamment de forme rectangulaire, s’étendent transversalement par rapport aux canaux 1 1 et 21.  The feeding and evacuation zones 31 and 32, of elongate shape, in particular of rectangular shape, extend transversely with respect to the channels 11 and 21.
Les zones d’alimentation et d’évacuation 31 et 32, formées sur la plaque 8, se raccordent respectivement à une connectique d’entrée 37 et de sortie (non visible), ces connectiques, notamment formées chacune par une tubulure, toutes les deux connectiques s’étendant soit sur la face supérieure, soit sur la face inférieur, à savoir d’un même coté de la plaque. Dans l’exemple illustré aux figures 8et 9, les connectiques d’entrée 37 et de sortie 38 de fluide sont sensiblement au milieu de la plaque de canaux 8. Ainsi le fluide arrivant par la connectique est distribué de part et d’autre vers une extrémité de la plaque et vers I autre extrémité respectivement. The supply and discharge areas 31 and 32, formed on the plate 8, are respectively connected to an input connector 37 and output (not visible), these connectors, in particular each formed by a tubing, both connectors extending either on the upper face or on the lower face, namely on the same side of the plate. In the example illustrated in FIGS. 8 and 9, the input connectors 37 and fluid outlet connectors 38 are substantially in the middle of the channel plate 8. Thus the fluid arriving via the connectors is distributed on either side towards a end of the plate and towards the other end respectively.
Les canaux des première et deuxième séries présentent la même section transversale et sont espacés les un des autres de manière régulière.  The channels of the first and second series have the same cross section and are spaced apart from each other on a regular basis.
Selon un aspect de l’invention, les cellules de batterie présentent une section plus grande que l’espace entre un canal de la première série et un canal de la deuxième série, canaux qui sont immédiatement voisins.  According to one aspect of the invention, the battery cells have a larger section than the space between a channel of the first series and a channel of the second series, which channels are immediately adjacent.
Les bases de cellules de batterie 4, notamment toutes les bases 60, sont refroidies par à la fois un canal de la première série et un canal de la deuxième série, comme illustré sur la figure 6.  The battery cell bases 4, in particular all the bases 60, are cooled by both a channel of the first series and a channel of the second series, as illustrated in FIG.
Le support 40 pour recevoir les cellules de batterie est une plaque assemblée avec la plaque de canaux 8, notamment brasure.  The support 40 for receiving the battery cells is a plate assembled with the channel plate 8, in particular solder.
Les plaques de support 40 et plaque 8 de canaux ont sensiblement les mêmes dimensions et formes, notamment présentent des bords droits, notamment en étant inscrit dans un rectangle.  The support plates 40 and channel plate 8 have substantially the same dimensions and shapes, especially have straight edges, including being inscribed in a rectangle.
La plaque de support 40 ferme des canaux 1 1 et 21.  The support plate 40 closes channels 1 1 and 21.
La connectique d’entrée ou de sortie passe par cette plaque de support 40, notamment cette plaque comporte un orifice 41 pour le passage d’une tubulure 37, comme visible sur la figure 9.  The input or output connection goes through this support plate 40, in particular this plate has an orifice 41 for the passage of a pipe 37, as can be seen in FIG. 9.
La plaque de support 40 est réalisée en aluminium et comporte des alvéoles 45 agencées pour recevoir chacune une cellule de batterie 4.  The support plate 40 is made of aluminum and comprises cells 45 arranged to receive each a battery cell 4.
Ces alvéoles 45 sont disposées en rangées parallèles aux canaux. These cells 45 are arranged in rows parallel to the channels.
Ces alvéoles 45 reçoivent la base des cellules 4. These cells 45 receive the base of the cells 4.
Chaque cellule de batterie est cylindrique. Le système comporte une plaque de fond 50 agencée pour être assemblée avec la plaque de canaux 8. Each battery cell is cylindrical. The system comprises a bottom plate 50 arranged to be assembled with the channel plate 8.
Cette plaque de fond 50 est agencée pour fermer les canaux de l'une des séries de canaux.  This bottom plate 50 is arranged to close the channels of one of the series of channels.
Les coudes de retournement sont formés par des ouvertures traversantes 55 dans la plaque de canaux 8 qui permettent au fluide de passer d’une face à l’autre de la plaque 8 de canaux et de faire demi-tour dans l’autre plan.  The turning elbows are formed by through apertures 55 in the channel plate 8 which allow the fluid to pass from one face to the other of the channel plate 8 and turn around in the other plane.
Les canauxl 1 et 21 sont alternés en disposition.  Channels 1 and 21 are alternately arranged.
Comme on peut le voir sur les figures 3 et 4, la plaque 8 comporte des embossages alternés de manière à former des sillons 9 alternés pour définir alternativement les canaux 1 1 et 21 sur chacune des faces supérieure et inférieure de la plaque 8.  As can be seen in FIGS. 3 and 4, the plate 8 comprises alternating embossings so as to form alternating grooves 9 to alternately define the channels 1 1 and 21 on each of the upper and lower faces of the plate 8.
Les canaux 1 1 de la face supérieure débouchent à une extrémité sur les ouvertures traversantes 55, chaque ouverture 55 distribuant le fluide dans le canal 1 1 qui arrive à cette ouverture 55 vers deux canaux 21 de l’autre face de la plaque.  The channels 1 1 of the upper face open at one end on the through openings 55, each opening 55 distributing the fluid in the channel 1 1 which arrives at this opening 55 to two channels 21 of the other side of the plate.
Autrement dit chaque canal 21 de la face inférieure communique avec deux canaux de la face supérieure.  In other words, each channel 21 of the lower face communicates with two channels of the upper face.
Ainsi l’invention permet de garantir un refroidissement homogène sur un maillage de cellules cylindriques pour le domaine des véhicules automobiles électriques.  Thus, the invention makes it possible to guarantee homogeneous cooling on a mesh of cylindrical cells for the field of electric motor vehicles.
Il est bien entendu possible selon l’invention d’avoir la plaque de fond 50 agencée pour être au contact avec un ensemble de cellules de batterie supplémentaire. Dans ce cas, un premier groupe de cellules de batterie est en contact avec la face supérieure et un deuxième groupe de cellules est en contact avec l’autre face.  It is of course possible according to the invention to have the bottom plate 50 arranged to be in contact with a set of additional battery cells. In this case, a first group of battery cells is in contact with the upper face and a second group of cells is in contact with the other side.
Autrement dit les plaques sont interposées entre deux ensembles de cellules.  In other words, the plates are interposed between two sets of cells.
La plaque de fond 50 peut être similaire à la plaque de support The bottom plate 50 may be similar to the support plate
40 avec des alvéoles pour recevoir les cellules. Grâce à l’invention, chaque cellule voit, en termes thermiques, le canal « froid » et le canal « chaud » du fluide caloporteur, afin que la température moyenne du fluide vue par chaque cellule soit la même. 40 with cells to receive the cells. Thanks to the invention, each cell sees, in thermal terms, the "cold" channel and the "hot" channel of the coolant, so that the average temperature of the fluid seen by each cell is the same.
L’échange thermique peut, le cas échéant, se faire sur chacune des faces de la plaque, dans la mesure où il y a besoin de refroidissement sur les deux faces de l’échangeur.  The heat exchange may, if necessary, be on each side of the plate, insofar as there is need for cooling on both sides of the exchanger.
Pour limiter la perte de charge dans l’échangeur, la taille des canaux est optimisée.  To limit the pressure drop in the exchanger, the size of the channels is optimized.
Les canaux de refroidissement assurent l’échange thermique d’une part avec la moitié de la base 60 de chaque cellule cylindrique face supérieur, le fluide étant en contact direct avec la plaque de support 40 supérieure, mais également avec la moitié de la base 60 de chaque cellule cylindrique face inférieure, le fluide étant en contact indirect avec la plaque inférieure par l’intermédiaire du fond de canal. Les canaux 1 1 sont disposés alternativement avec les canaux 21 , lesquels assurent le retour du fluide à contre courant. Les canaux 1 1 et 21 possèdent la même largeur dans ce mode de réalisation, ladite largeur étant fonction du pas entre chaque cellule.  The cooling channels provide heat exchange on the one hand with half of the base 60 of each upper face cylindrical cell, the fluid being in direct contact with the upper support plate 40, but also with half of the base 60 of each lower-face cylindrical cell, the fluid being in indirect contact with the lower plate via the channel bottom. The channels 1 1 are alternately arranged with the channels 21, which ensure the return of the fluid against the current. The channels 1 1 and 21 have the same width in this embodiment, said width being a function of the pitch between each cell.
Sur la face inférieure, les canaux 21 permettent l’échange thermique d’une part avec la moitié de la base 60 de chaque cellule cylindrique face inférieure, le fluide étant en contact direct avec la plaque inférieure 50, mais également avec la moitié de la base de chaque cellule cylindrique face supérieure, le fluide étant en contact indirect avec la plaque de support 8 supérieure par l’intermédiaire du fond de canal ou fond de sillon 9.  On the lower face, the channels 21 allow heat exchange on the one hand with half of the base 60 of each cylindrical cell bottom face, the fluid being in direct contact with the lower plate 50, but also with half of the base of each upper-face cylindrical cell, the fluid being in indirect contact with the upper support plate 8 via the channel bottom or furrow bottom 9.
Les plaques 40 et 50 ferment le circuit fluidique.  The plates 40 and 50 close the fluid circuit.
De préférence, les canaux 1 1 et 21 s’étendent chacun entre les zones d’alimentation et d’évacuation. En particulier ils sont séparés les uns des autres en dehors des zones d’alimentation et d’évacuation. Notamment ces canaux 1 1 et 21 ne se croisent pas en en dehors des zones d’alimentation et d’évacuation. Preferably, the channels 1 1 and 21 each extend between the supply and discharge areas. In particular they are separated from each other outside the areas of supply and discharge. Especially these channels 1 1 and 21 do not intersect outside the areas of supply and discharge.

Claims

REVENDICATIONS
1. Système de refroidissement (1 ) de cellules de batterie, ce système comportant : 1. Cooling system (1) of battery cells, this system comprising:
un circuit (2) de fluide caloporteur,  a circuit (2) for heat transfer fluid,
un support (40) agencé pour recevoir des cellules de batterie, ce support étant en contact thermique avec le fluide caloporteur,  a support (40) arranged to receive battery cells, this support being in thermal contact with the coolant,
système dans lequel le circuit de fluide comprend une première série (10) de canaux de fluide s’étendant dans un premier plan et une deuxième série (20) de canaux de fluide s’étendant dans un deuxième plan distinct du premier plan, l’un au moins des canaux de la première série se raccordant à l’un au moins des canaux de la deuxième série par un coude de retournement qui s’étend entre lesdits deux plans de sorte que ces deux canaux forment entre eux un angle inférieur à 90°, notamment inférieur à 45° ou inférieur 5°, notamment ces canaux forment entre eux un angle de 0° auquel cas ces canaux sont parallèles avec des sens d’écoulement opposés. system in which the fluid circuit comprises a first series (10) of fluid channels extending in a first plane and a second series (20) of fluid channels extending in a second plane distinct from the first plane; at least one of the channels of the first series connecting to at least one of the channels of the second series by a turning elbow which extends between said two planes so that these two channels form between them an angle less than 90 °, especially less than 45 ° or less than 5 °, in particular these channels form between them an angle of 0 ° in which case these channels are parallel with opposite flow directions.
2. Système selon la revendication précédente, dans lequel le système comporte une plaque de canaux (8) définissant au moins partiellement les canaux de l’une au moins des première et deuxième séries, notamment la plaque définit au moins partiellement les canaux des deux séries. 2. System according to the preceding claim, wherein the system comprises a channel plate (8) defining at least partially the channels of at least one of the first and second series, in particular the plate at least partially defines the channels of the two series. .
3. Système selon la revendication précédente, dans lequel la plaque de canaux comporte des sillons (1 1 ) définissant au moins partiellement les canaux. 3. System according to the preceding claim, wherein the channel plate has grooves (1 1) at least partially defining the channels.
4. Système selon la revendication 2 ou 3, dans lequel la plaque de canaux est réalisée d’un seul tenant, notamment en aluminium, notamment par emboutissage. 5. Système selon l’une des revendications 2 à 4, dans lequel la plaque de canaux (8) comporte sur la face supérieure une série de sillons pour former les canaux de la première série et sur la face inférieure une série de sillons pour former les canaux de la deuxième série. 6. Système selon l’une des revendications 2 à 5, dans lequel la plaque 8 comporte des embossages alternés de manière à former des sillons (9) alternés pour définir alternativement les canaux sur chacune des faces supérieure et inférieure de la plaque (8). 7. Système selon l’une des revendications précédentes, dans lequel au moins certaines des bases (60) de cellules de batterie, notamment toutes les bases, sont refroidies par à la fois un canal de la première série et un canal de la deuxième série. 8. Système selon l’une des revendications précédentes, dans lequel le support pour recevoir les cellules de batterie est une plaque assemblée avec la plaque de canaux, notamment brasure. 4. System according to claim 2 or 3, wherein the channel plate is made in one piece, in particular aluminum, in particular by stamping. 5. System according to one of claims 2 to 4, wherein the channel plate (8) has on the upper face a series of grooves to form the channels of the first series and on the lower face a series of grooves to form the channels of the second series. 6. System according to one of claims 2 to 5, wherein the plate 8 comprises alternating embossments to form grooves (9) alternately to alternately define the channels on each of the upper and lower faces of the plate (8). . 7. System according to one of the preceding claims, wherein at least some of the bases (60) of battery cells, including all the bases, are cooled by both a channel of the first series and a channel of the second series. . 8. System according to one of the preceding claims, wherein the support for receiving the battery cells is a plate assembled with the channel plate, in particular solder.
9. Système selon l’une des revendications précédentes, dans lequel le coude de retournement est formé par des ouvertures traversantes9. System according to one of the preceding claims, wherein the turning elbow is formed by through openings
(55) dans la plaque de canaux qui permettent au fluide de passer d’une face à l’autre de la plaque de canaux. (55) in the channel plate which allows the fluid to pass from one side to the other of the channel plate.
10. Système selon l’une des revendications précédentes, dans lequel, sur la face inférieure de la plaque de canaux, les canaux (21 ) permettent l’échange thermique d’une part avec la moitié de la base (60) de chaque cellule cylindrique face inférieure, le fluide étant en contact direct avec la plaque inférieure (50), et également avec la moitié de la base de chaque cellule cylindrique face supérieure, le fluide étant en contact indirect avec la plaque de support (8) supérieure par l’intermédiaire du fond de canal ou fond de sillon (9). 10. System according to one of the preceding claims, wherein, on the underside of the channel plate, the channels (21) allow heat exchange on the one hand with half of the base (60) of each cell. cylindrical lower face, the fluid being in direct contact with the lower plate (50), and also with half of the base of each upper-face cylindrical cell, the fluid being in indirect contact with the upper support plate (8) via the channel bottom or bottom furrow (9).
PCT/FR2019/050647 2018-03-21 2019-03-21 Cooling system for motor vehicle battery cells WO2019180385A1 (en)

Priority Applications (2)

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CN201980019505.3A CN111919332A (en) 2018-03-21 2019-03-21 Cooling system for a motor vehicle battery unit
EP19718784.2A EP3753066A1 (en) 2018-03-21 2019-03-21 Cooling system for motor vehicle battery cells

Applications Claiming Priority (2)

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FR1852447A FR3078199B1 (en) 2018-03-21 2018-03-21 MOTOR VEHICLE BATTERY CELL COOLING SYSTEM
FR1852447 2018-03-21

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EP3753066A1 (en) 2020-12-23
CN111919332A (en) 2020-11-10
FR3078199A1 (en) 2019-08-23

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