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WO2024003166A1 - Insert device for electrical storage device - Google Patents

Insert device for electrical storage device Download PDF

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Publication number
WO2024003166A1
WO2024003166A1 PCT/EP2023/067699 EP2023067699W WO2024003166A1 WO 2024003166 A1 WO2024003166 A1 WO 2024003166A1 EP 2023067699 W EP2023067699 W EP 2023067699W WO 2024003166 A1 WO2024003166 A1 WO 2024003166A1
Authority
WO
WIPO (PCT)
Prior art keywords
batteries
rows
electrical storage
cooling
interlayer
Prior art date
Application number
PCT/EP2023/067699
Other languages
French (fr)
Inventor
Alcina Tanghe
Franck Aubry
Arnaud CHAPELLE
Peggy HAVET
William JOUIN
Eva MACEIRA
Claudia ROTONDO
Marianne SEGURA
Alain Guinault
Original Assignee
Valeo Systemes Thermiques
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2024003166A1 publication Critical patent/WO2024003166A1/en

Links

Classifications

    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the 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
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material

Definitions

  • the present invention relates to the field of electrical storage devices intended to be used within electric or hybrid vehicles.
  • Electrical storage devices are commonly used in motor vehicles, whether with electric or hybrid engines, to ensure the supply of electrical energy to the vehicle for its movement.
  • Such electrical storage devices usually comprise a plurality of electrical storage cells, or batteries, organized in a battery box within which at least one cooling device is arranged.
  • the cooling device ensures in particular the cooling of the batteries by capturing their calories in order to limit the phenomena of overheating of the electrical storage device.
  • the type of electrical storage cells may differ from one electrical storage device to another, but it is known to have cells that each have a cylindrical shape, with the cells organized into battery rows.
  • the cooling device comprises cooling tubes extending respectively between the rows of cells and within which a cooling fluid circulates, distributed and collected by appropriate chambers arranged at the ends of the tubes and connected to each other .
  • spacer devices which have the same shape as the cooling tubes, in order to arrange them between certain rows of cells. These spacers, like the cooling tubes, allow the rows of cells to be kept at regular intervals from each other, but they do not have a cooling function. This makes it possible in particular not to make the interlayer devices in the same metallic material as the cooling tubes, and to use less expensive and lighter thermoplastic materials.
  • maintaining the cells in relation to each other, particularly within the same row of cells is achieved by means of a bonding material injected into the battery box.
  • the bonding material may be an epoxy resin.
  • a problem with current electrical storage devices lies in particular in the adhesion of the bonding material to the interlayer devices.
  • the spacer devices used within electrical storage devices can be made of polypropylene in order to limit the costs and complexity of producing these devices.
  • such a material has poor adhesion to the bonding material such as epoxy resin, which has the effect of limiting the bonding performance and therefore maintaining the cells in relation to each other.
  • the aim of the invention is to propose an interlayer device whose adhesion with the bonding material is improved in order to optimize the solidity of the electrical storage device and in particular the maintenance of the cells in rows relative to each other. .
  • the invention therefore relates to an interposer device configured to extend between two rows of batteries of an electrical storage device, the interposer device extending mainly in a longitudinal direction and having at least one internal body covered with a layer external, the internal body and the external layer being made respectively of a first material and a second material different from the first material, the second material having a surface tension greater than a surface tension of the first material.
  • the electrical storage device is used within an electric or hybrid motor vehicle and has the particular function of supplying an electric motor for the movement of said vehicle.
  • the electrical storage device comprises at least two rows of batteries which store electrical energy and at least one intermediate device arranged between the two rows of batteries, these being housed in a battery box into which a bonding material.
  • the bonding material has the particular function of freezing the position of the batteries within the trunk, in relation to each other and also in relation to the intermediate device, adhering at least in part to each of these elements.
  • the insert device comprises an internal body made of a first material and an external layer, covering the internal body, made of a second material distinct from the first material in that the surface tension of the second material is greater than the surface tension of the first material.
  • the second material allows better adhesion with an epoxy resin which can form the bonding material.
  • the first material comprises a first viscosity rate and the second material comprises a second viscosity rate, the first viscosity rate being greater than the second viscosity rate, preferably at least 15% greater, preferably 50%, preferably greater than 100% compared to the second viscosity rate of the second material.
  • Advantage is taken of having a first viscosity rate greater than the second viscosity rate in that it makes it possible to improve the separation of the first material and the second material during a manufacturing process of the interlayer device. More precisely, the difference in viscosity between the first material and the second material allows the latter to coat the first material during the manufacturing process of the insert device.
  • the first material is polypropylene.
  • the second material is polypropylene grafted with maleic anhydride.
  • the intermediate device comprises at least one main body formed by the internal body and the external layer, configured to be in contact with two rows of batteries, and at least one fluid connection pipe arranged at one end longitudinal of the main body, the fluid connection pipe being configured to allow the passage of a fluid.
  • the interposer device into a cooling device of the electrical storage device, in particular with cooling tubes which have a shape similar to that of the body of the interposer device intended to be clamped between the rows of batteries.
  • the connecting pipe is intended to allow the passage of fluid from one cooling tube to another, without the pipe fluidic connection and the main body do not exhibit fluidic interaction, the main body of the intermediate device not being configured to allow the passage of a liquid within it.
  • the main body has a corrugated profile.
  • a corrugated profile improves the maintenance of the batteries, particularly when the latter have a cylindrical shape.
  • each of the undulations of the main body of the intermediate device alternately accommodates one of the batteries of each of the two rows of batteries between which the intermediate device is arranged.
  • the invention also relates to an electrical storage device comprising at least three rows of batteries, each of the rows of batteries extending in a direction of main longitudinal elongation, the rows of batteries being aligned along a secant transverse direction of the longitudinal direction, the storage device electric comprising at least one intermediate device according to any of the preceding characteristics which extends longitudinally at least between two of the rows of batteries and at least one cooling device comprising at least one cooling circuit which extends in the longitudinal direction between two rows of batteries and at least one fluid connector at a free end of the cooling circuit, the fluid connector and the cooling circuit being fluidly connected to each other.
  • the cooling device ensures the cooling of the batteries by capturing their calories via a heat transfer fluid which circulates at least in the cooling circuit, also called a cooling tube.
  • the at least one intermediate device and the at least one cooling device are arranged alternately between the rows of batteries, the fluid connector of the cooling device and the fluid connection pipe of the device interlayer being fluidly connected to each other.
  • At least one row of batteries is arranged between the interposer device and the cooling device in the transverse direction.
  • the cooling device is made of aluminum. Such a material notably has optimal thermal properties.
  • the cooling tube of the cooling device has a corrugated profile.
  • the undulations of the cooling tube of the cooling device and/or of the main body of the interposer device have a complementary shape with a cylindrical shape of the batteries.
  • the invention also relates to a method of manufacturing an interlayer device according to any of the preceding characteristics, the method using the first material, the second material and a mixing device comprising at least one inlet opening and a helical member arranged in an internal volume of the mixing device, the method comprising at least a first step during which the first material is mixed with the second material so as to obtain a mixture comprising at least 70% of the first material, at least a second step during which the mixture is introduced into the mixing device through the inlet opening then the helical member is rotated so that it separates the first material and the second material such that the second material coats the first material.
  • the mixing device comprises at least one outlet opening, preferably opposite its inlet opening, the process comprising at least a third step during which the mixture is expelled from the mixing device by the rotation of the helical member and in such a way as to obtain the main body of the intermediate device at the outlet of the mixing member.
  • FIG. 1 is a schematic top view of an electrical storage device according to the invention.
  • FIG. 1 is a close-up view of the electrical storage device of Figure 1 showing an alternating arrangement of an interposer device and a cooling device between rows of batteries;
  • FIG. 3 is a cross-sectional and longitudinal view of the insert device of Figure 2;
  • FIG. 4 is a longitudinal sectional view of a mixing device used in a method of manufacturing the interlayer device according to the invention.
  • the invention relates to an electrical storage device 1, visible in Figure 1, capable in particular of equipping a motor vehicle with an electric or hybrid engine.
  • an electrical storage system 1 is intended in particular to provide electrical energy to the motor vehicle for its movement.
  • the electrical storage device 1 comprises a plurality of batteries 2 ensuring the storage of electrical energy and arranged within a battery box 26.
  • the batteries 2 are here in a cylindrical shape. More precisely, the batteries 2 are arranged in rows 4 of batteries 2 and such that the electrical storage device 1 comprises at least three rows 4 of batteries 2. It should be considered that the electrical storage device 1 can comprise more than three rows 4 of batteries 2 but that the invention will be described in the remainder of the description with only three rows 4 of batteries 2, all of the characteristics described in relation to the rows 4 of batteries 2 applying mutatis mutandis to an indeterminate quantity of rows 4 of batteries 2.
  • each of the rows 4 of batteries 2 extends in a direction of main elongation P longitudinal L, the rows 4 of batteries 2 being arranged in parallel to each other in a transverse direction T intersecting the longitudinal direction L.
  • the rows 4 of batteries 2 are spaced apart from each other in the transverse direction T and the batteries 2 are spaced from each other in the longitudinal direction L within the same row 4 of batteries 2. It is understood that such longitudinal spacing L and transverse spacing T between the batteries 2 limits overheating phenomena within the electrical storage device 1.
  • the electrical storage device i comprises at least one intermediate device 6 which extends longitudinally at least between two of the rows 4 of batteries 2.
  • the intermediate device 6 participates in particular in maintaining the two rows 4 of batteries 2 between they.
  • the intermediate device 6 has at least partly a corrugated profile, visible in Figure 2, in order to present a complementarity of shape with the cylindrical batteries 2, such complementarity of shape ensuring the maintenance of the batteries 2 within the rows 4 of batteries 2.
  • the intermediate device 6 will be detailed in particular later in the remainder of the description, in Figures 2 and 3.
  • the electrical storage device 1 comprises at least one cooling device 8, visible in Figures 1 and 2, which extends in the longitudinal direction L between two rows 4 of batteries 2.
  • the cooling device 8 comprises at least one cooling circuit, or cooling tube, 10 which extends in the longitudinal direction L between two rows 4 of batteries 2, and at least one fluid connector 12 which extends to a free end 14 of the cooling circuit.
  • cooling 10 ensures the circulation of a heat transfer fluid between the batteries 2 of the two rows 4 of batteries 2 between which it extends, thus ensuring the cooling of the latter by capturing their calories.
  • the fluid connector 12 ensures the routing of the heat transfer fluid towards the cooling circuit 10 so that the latter captures the calories from the batteries in order to cool them.
  • the fluid connector 12 and the cooling circuit 10 are fluidly connected to each other.
  • the fluid connector 12 is also connected directly or indirectly to a heat transfer fluid storage tank, here not visible.
  • the fluid connector 12 can comprise two circulation conduits 13, such that one of the circulation conduits corresponds to the inlet pipe for the heat transfer fluid into the cooling circuit, and the other corresponds to the outlet pipe for the heat transfer fluid from the cooling circuit.
  • the cooling tube like the intermediate device, can have a complementary shape with the shape of the batteries 8, and in particular have a corrugated profile so as to cooperate optimally with the cylindrical shape of the batteries 2.
  • the at least one intermediate device 6 and the at least one cooling device 8 are arranged alternately between the rows 4 of batteries 2. It is understood in particular that the intermediate device 6 and the cooling device 8 do not extend between two same rows 4 of batteries 2. More particularly, the intermediate device 6 and the cooling device 8 are arranged alternately between the rows 4 of batteries 2 according to the transverse direction T. Thus, we understand that at least one row 4 of batteries 2 is arranged between the intermediate device 6 and the cooling device 8 in the transverse direction T.
  • the cooling device 8 and the intermediate device are distinguished from each other on the one hand due to their internal structure, with the cooling device which is capable of being passed through by a cooling fluid while the tube does not is not, and on the other hand due to the material which composes them.
  • the cooling device is made of a thermally conductive material, and in particular aluminum which also has an advantage in terms of weight.
  • the intermediate device is made from a thermoplastic material, and in particular polypropylene, since this intermediate device has the sole function of creating the desired spacing between two rows of successive batteries and it is desired to have a material inexpensive and easy to conform.
  • the intermediate device 6 will now be described in more detail by means of Figures 2 and 3. It will also be understood that only an intermediate device 6 will be described in detail in the remainder of the description but that all of the characteristics described are apply mutatis mutandis to a plurality of interlayer devices 6 of the electrical storage device 1.
  • the intermediate device 6 according to the invention extends mainly in the longitudinal direction L and comprises at least one main body 16 and a fluid connection pipe 18 disposed at a longitudinal end 20 of the main body 16.
  • the fluid connection pipe 18 is configured to allow the passage of a fluid, here the heat transfer fluid circulating in the cooling device 8, in particular to allow the passage of this fluid from one cooling device 8 to the other.
  • a fluid here the heat transfer fluid circulating in the cooling device 8
  • the main body 16 of the intermediate device 6 is not configured for the passage of a fluid, so that the fixing of the fluid connection pipe 18 on the main body 16 does not require connection fluidics.
  • the fluid connection pipe 18 and the fluid connector 12 of the cooling device 8 are configured to be fluidly connected to each other.
  • fluid communication between the fluid connection pipe 18 and the fluid connector 12 ensures the delivery of heat transfer fluid to the cooling circuit 10 despite the alternating arrangement of the intermediate device 6 and the cooling device 8 between the rows 4 of batteries 2.
  • the fluid connection pipe 18 can comprise two circulation channels 19 so as to cooperate with the circulation conduits 13 of the cooling device 8 as mentioned previously.
  • the intermediate device 6 comprises an internal body 22 covered with an external layer 24, the internal body 22 and the external layer 24 forming in particular the main body 16 mentioned above.
  • the external layer 24 of the main body 16 surrounds the internal body so as to form the external surface of the main body, intended to be in contact with the two rows 4 of batteries 2 between which the intermediate device 6 is arranged and to be in contact bonding material 28 injected into the battery box.
  • the internal body 22 and the external layer 24 are made respectively of a first material and a second material which is different from the first material.
  • the two materials differ in the surface tension specific to them, this different surface tension being able in particular to be obtained by an additive added to the polypropylene serving as the base material for the entire interlayer device.
  • the second material used to make the external layer intended to be in contact with the bonding material 28, has a surface tension greater than a surface tension of the first material, used to make the internal body.
  • a high surface tension of the second material allows the latter to be able to chemically bond more easily with the bonding material, for example formed by epoxy resin.
  • the two materials used to make the interlayer device differ in their viscosity rate.
  • the first material, used to make the internal body has a first viscosity rate and the second material, used to make the outer layer, has a second viscosity rate, the first viscosity rate being greater than the second viscosity rate.
  • Such a difference in viscosity between the first material and the second material is particularly advantageous in a method of manufacturing the intermediate device 6 according to the invention, to allow the second material to position itself over the first material during the phase of extrusion, such a process being detailed later in the remainder of the detailed description.
  • the fluidity of grafted PP is generally between iogr/10 min to 8ogr/io min while the fluidity of simple PP, called “at core” is generally between 10 gr/10 min min. at 20 gr/iomin.
  • MFI is a fluidity index, therefore comparable to viscosity.
  • the MFI represents the quantity of material which flows in a die, with a given weight and at a given temperature: it is expressed in g/lomin.
  • the minimum difference between the two materials must be at least 15% to guarantee demixing.
  • the fluidity of the grafted PP must always be greater than the fluidity of the PP at the core.
  • the internal material must be more viscous and therefore have a low MFI, while the external material must be more fluid in comparison and therefore have a higher MFI.
  • the first material is polypropylene and the second material is polypropylene grafted with maleic anhydride.
  • the fluid connection pipe 18 of the intermediate device 6 can for example be made of polypropylene.
  • the intermediate device 6 presents at least in part a complementarity of shape with the batteries 2. More precisely, the main body 16 of the intermediate device 6 presents a complementarity of shape with the batteries 2 and presents at this end a wavy profile.
  • the nesting of the batteries 2 in the undulations of the main body 16 of the intermediate device 6 makes it possible to improve the maintenance of said batteries 2 within the electrical storage device 1 in cooperation with the cooling device 8 described previously.
  • the previously mentioned arrangement of an internal body and an external layer, with different viscosity and surface tension properties, takes effect in particular over the entire longitudinal extent of the main body 16 of the intermediate device 6.
  • the intermediate device 6 makes it possible to improve the adhesion of the bonding material 28 on the main body 16 of the intermediate device 6, as visible in Figure 1
  • the at least three rows 4 of batteries 2 are assembled with each other by means of the intermediate device 6 and the cooling device 8 as described previously, the assembly being arranged in the box 26 of battery 2, visible in Figure 1, subsequently filled with the bonding material 28 so that it blocks in position the different elements of the electrical storage device 1.
  • the composition particular of the main body 16 of the intermediate device 6 ensures optimal adhesion of the bonding material 28 with said main body 16 and in particular with the external layer 24. This improves the maintenance of the intermediate device 6 within the electrical storage device 1, and thus maintaining the batteries.
  • the manufacturing method according to the invention notably implements a mixing device 30 comprising at least one inlet opening 32 and an outlet opening 34 opposite its inlet opening 32 in a direction of main elongation of the mixing device. blend.
  • the mixing device 30 further comprises an internal volume 36 delimited by a peripheral wall 38 in which the inlet 32 and outlet 34 openings are formed.
  • the inlet 32 and outlet 34 openings ensure fluid communication between the internal volume 36 of the mixing device 30 with an environment external to the latter.
  • the mixing device 30 further comprises a helical member 40 disposed in its internal volume 36, the helical member 40 extending substantially over the entire length of the mixing device 30 in its direction of main elongation.
  • the method comprises at least a first step during which the first material is mixed with the second material so as to obtain a mixture 41.
  • the mixture 41 may in particular comprise at least 70% of the first material.
  • the mixture 41 obtained during the first step is introduced into the internal volume 36 of the device mixture 30, through the inlet opening 32, then the helical member 40 is rotated so that it separates the first material and the second material so that the second material coats the first material.
  • Such a separation of the first material and the second material within the internal volume 36 of the mixing device 30 is notably implemented due to the difference in viscosity between these materials as mentioned previously.
  • the second material less viscous, tends to move faster and come into contact with the internal surface of the peripheral wall, so that the first material, more viscous than the second material, is separated from this internal surface by the presence of the second material.
  • the method comprises at least a third step during which the mixture is expelled from the mixing device 30 by the rotation of the helical member 40 and in such a way as to obtain a matrix of the main body 16 of the intermediate device 6 at the outlet of the mixing member 30 via the outlet opening 34.
  • the main body can then be shaped to take the wavy shape previously mentioned.
  • the intermediate device is then obtained via the completion of at least one additional step, here fourth step, during which the fluid connection pipe 18 is secured to the longitudinal end 20 of the main body 16 obtained from the three first stages of the process.
  • the connection between the fluid connection pipe 18 and the main body 16 can in particular be carried out for example by brazing or by bonding, or by any other means ensuring a tight connection between them.
  • the invention responds well to the goals that it had set for itself, namely obtaining an intermediate device which allows good hold of a bonding material without it It is necessary to make this interlayer device in an expensive material.
  • an intermediate device is formed at least in part of two different materials, with the cover material, intended to be in contact with a bonding material in a battery box, which has a surface tension greater than the average surface tension of the rest of the device interlayer.

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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)
  • Battery Mounting, Suspending (AREA)

Abstract

The present invention relates to an insert device (6) configured to extend between two rows (4) of batteries (2) of an electrical storage device (1), the insert device (6) extending mainly in a longitudinal direction (L) and having at least one internal body covered with an external layer, the internal body and the external layer being made, respectively, of a first material and of a second material different from the first material, the second material having a surface tension greater than a surface tension of the first material.

Description

DESCRIPTION DESCRIPTION
Titre de l'invention : DISPOSITIF INTERCALAIRE POUR DISPOSITIF DE STOCKAGE ELECTRIQUE Title of the invention: INTERLAYER DEVICE FOR ELECTRICAL STORAGE DEVICE
La présente invention se rapporte au domaine des dispositifs de stockage électrique destinés à être utilisés au sein de véhicule électrique ou hybride.The present invention relates to the field of electrical storage devices intended to be used within electric or hybrid vehicles.
Les dispositifs de stockage électrique sont couramment utilisés dans les véhicules automobiles, qu’ils soient à motorisation électrique ou hybride, pour assurer la fourniture en énergie électrique au véhicule en vue de son déplacement. De tels dispositifs de stockage électrique comprennent habituellement une pluralité de cellules de stockage électrique, ou batteries, organisées dans un coffre de batterie au sein duquel est disposé au moins un dispositif de refroidissement. Le dispositif de refroidissement assure notamment le refroidissement des batteries en captant leurs calories afin de limiter les phénomènes de surchauffe du dispositif de stockage électrique.Electrical storage devices are commonly used in motor vehicles, whether with electric or hybrid engines, to ensure the supply of electrical energy to the vehicle for its movement. Such electrical storage devices usually comprise a plurality of electrical storage cells, or batteries, organized in a battery box within which at least one cooling device is arranged. The cooling device ensures in particular the cooling of the batteries by capturing their calories in order to limit the phenomena of overheating of the electrical storage device.
Le type de cellules de stockage électrique peut différer d’un dispositif de stockage électrique à l’autre, mais il est connu d’avoir des cellules qui présentent chacune une forme cylindrique, les cellules étant organisées en rangées de batteries. Dans ce contexte, le dispositif de refroidissement comporte des tubes de refroidissement s’étendant respectivement entre les rangées de cellules et au sein desquels circule un fluide de refroidissement, distribué et collecté par des chambres appropriées disposées aux extrémités des tubes et raccordées les unes aux autres. Il est connu de prévoir des dispositifs intercalaires, qui présentent la même forme que les tubes de refroidissement, afin de les disposer entre certaines rangées de cellules. Ces intercalaires permettent comme les tubes de refroidissement de maintenir à intervalles réguliers les rangées de cellule les unes des autres, mais ils n’ont pas de fonction de refroidissement. Ceci permet notamment de ne pas réaliser les dispositifs intercalaires dans le même matériau métallique que les tubes de refroidissement, et d’utiliser des matériaux thermoplastiques moins coûteux et plus légers. Par ailleurs, le maintien des cellules les unes par rapport aux autres, notamment au sein d’une même rangée de cellules, est réalisé par l’intermédiaire d’un matériau de collage injecté dans le coffre de batterie. A titre d’exemple, le matériau de collage peut être une résine époxy. The type of electrical storage cells may differ from one electrical storage device to another, but it is known to have cells that each have a cylindrical shape, with the cells organized into battery rows. In this context, the cooling device comprises cooling tubes extending respectively between the rows of cells and within which a cooling fluid circulates, distributed and collected by appropriate chambers arranged at the ends of the tubes and connected to each other . It is known to provide spacer devices, which have the same shape as the cooling tubes, in order to arrange them between certain rows of cells. These spacers, like the cooling tubes, allow the rows of cells to be kept at regular intervals from each other, but they do not have a cooling function. This makes it possible in particular not to make the interlayer devices in the same metallic material as the cooling tubes, and to use less expensive and lighter thermoplastic materials. Furthermore, maintaining the cells in relation to each other, particularly within the same row of cells, is achieved by means of a bonding material injected into the battery box. For example, the bonding material may be an epoxy resin.
Un problème des dispositifs de stockage électrique actuels réside notamment dans l’adhérence du matériau de collage sur les dispositifs intercalaires. Tel qu’évoqué, les dispositifs intercalaires utilisés au sein des dispositifs de stockage électrique peuvent être réalisés en polypropylène afin de limiter les coûts et la complexité de production de ces dispositifs. Or, un tel matériau présente une faible adhérence au matériau de collage tel que la résine époxy ce qui a pour effet de limiter les performances de collage et donc de maintien des cellules les unes par rapport aux autres. A problem with current electrical storage devices lies in particular in the adhesion of the bonding material to the interlayer devices. As mentioned, the spacer devices used within electrical storage devices can be made of polypropylene in order to limit the costs and complexity of producing these devices. However, such a material has poor adhesion to the bonding material such as epoxy resin, which has the effect of limiting the bonding performance and therefore maintaining the cells in relation to each other.
Ainsi, le but de l’invention est de proposer un dispositif intercalaire dont l’adhérence avec le matériau de collage est améliorée afin d’optimiser la solidité du dispositif de stockage électrique et notamment le maintien des cellules en rangées les unes par rapport aux autres. Thus, the aim of the invention is to propose an interlayer device whose adhesion with the bonding material is improved in order to optimize the solidity of the electrical storage device and in particular the maintenance of the cells in rows relative to each other. .
L’invention porte donc sur un dispositif intercalaire configuré pour s’étendre entre deux rangées de batteries d’un dispositif de stockage électrique, le dispositif intercalaire s’étendant principalement selon une direction longitudinale et présentant au moins un corps interne recouvert d’une couche externe, le corps interne et la couche externe étant faits respectivement d’un premier matériau et d’un deuxième matériau différent du premier matériau, le deuxième matériau présentant une tension de surface supérieure à une tension de surface du premier matériau. The invention therefore relates to an interposer device configured to extend between two rows of batteries of an electrical storage device, the interposer device extending mainly in a longitudinal direction and having at least one internal body covered with a layer external, the internal body and the external layer being made respectively of a first material and a second material different from the first material, the second material having a surface tension greater than a surface tension of the first material.
Le dispositif de stockage électrique est utilisé au sein d’un véhicule automobile électrique ou hybride et a notamment pour fonction d’assurer l’alimentation d’une motorisation électrique pour le déplacement dudit véhicule. Le dispositif de stockage électrique comprend à cette fin au moins deux rangées de batteries qui stockent l’énergie électrique et au moins un dispositif intercalaire disposé entre les deux rangées de batteries, ceux-ci étant logés dans un coffre de batterie dans lequel est injecté un matériau de collage. Le matériau de collage a notamment pour fonction de figer la position des batteries au sein du coffre, les unes par rapport aux autres et également par rapport au dispositif intercalaire, en adhérant au moins en partie à chacun de ces éléments. The electrical storage device is used within an electric or hybrid motor vehicle and has the particular function of supplying an electric motor for the movement of said vehicle. For this purpose, the electrical storage device comprises at least two rows of batteries which store electrical energy and at least one intermediate device arranged between the two rows of batteries, these being housed in a battery box into which a bonding material. The bonding material has the particular function of freezing the position of the batteries within the trunk, in relation to each other and also in relation to the intermediate device, adhering at least in part to each of these elements.
Tel qu’évoqué, le dispositif intercalaire selon l’invention comporte un corps interne réalisé dans un premier matériau et une couche externe, recouvrant le corps interne, réalisée dans un deuxième matériau distinct du premier matériau en ce que la tension de surface du deuxième matériau est supérieure à la tension de surface du premier matériau. On tire alors avantage de la tension de surface élevée du deuxième matériau, destinée à former la couche externe du dispositif intercalaire, au contact du matériau de collage, en ce que cela offre une meilleure adhérence avec le matériau de collage. De manière plus précise, le deuxième matériau permet une meilleure adhérence avec une résine époxy pouvant former le matériau de collage. On améliore ainsi le maintien des rangées de batteries au sein du coffre du dispositif de stockage électrique, par l’utilisation de ce deuxième matériau, tout en s’assurant d’une conception légère et peu coûteuse, puisque le premier matériau, à la tension de surface inférieure, est utilisé pour réaliser le noyau interne du dispositif d’intercalaire. As mentioned, the insert device according to the invention comprises an internal body made of a first material and an external layer, covering the internal body, made of a second material distinct from the first material in that the surface tension of the second material is greater than the surface tension of the first material. We then take advantage of the high surface tension of the second material, intended to form the outer layer of the interlayer device, in contact with the bonding material, in that this offers better adhesion with the bonding material. More precisely, the second material allows better adhesion with an epoxy resin which can form the bonding material. We thus improve the maintenance of the rows of batteries within the trunk of the electrical storage device, by the use of this second material, while ensuring a lightweight and inexpensive design, since the first material, at the voltage of lower surface, is used to make the internal core of the interlayer device.
Selon une caractéristique de l’invention, le premier matériau comprend un premier taux de viscosité et le deuxième matériau comprend un deuxième taux de viscosité, le premier taux de viscosité étant supérieur au deuxième taux de viscosité, de préférence au moins supérieur de 15%, préférentiellement 50%, de préférence supérieur de 100% par rapport au deuxième taux de viscosité du deuxième matériau. On tire avantage du fait d’avoir un premier taux de viscosité supérieur au deuxième taux de viscosité en ce qu’il permet d’améliorer la séparation du premier matériau et du deuxième matériau lors d’un procédé de fabrication du dispositif intercalaire. De manière plus précise, la différence de viscosité entre le premier matériau et le deuxième matériau permet à ce dernier d’enrober le premier matériau lors du procédé de fabrication du dispositif intercalaire. According to one characteristic of the invention, the first material comprises a first viscosity rate and the second material comprises a second viscosity rate, the first viscosity rate being greater than the second viscosity rate, preferably at least 15% greater, preferably 50%, preferably greater than 100% compared to the second viscosity rate of the second material. Advantage is taken of having a first viscosity rate greater than the second viscosity rate in that it makes it possible to improve the separation of the first material and the second material during a manufacturing process of the interlayer device. More precisely, the difference in viscosity between the first material and the second material allows the latter to coat the first material during the manufacturing process of the insert device.
Selon une caractéristique de l’invention, le premier matériau est du polypropylène. Selon une caractéristique de l’invention, le deuxième matériau est du polypropylène greffé par anhydride maléique. According to one characteristic of the invention, the first material is polypropylene. According to one characteristic of the invention, the second material is polypropylene grafted with maleic anhydride.
Selon une caractéristique de l’invention, le dispositif intercalaire comprend au moins un corps principal formé par le corps interne et la couche externe, configuré pour être au contact de deux rangées de batteries, et au moins une conduite de liaison fluidique disposée à une extrémité longitudinale du corps principal, la conduite de liaison fluidique étant configurée pour permettre le passage d’un fluide. According to one characteristic of the invention, the intermediate device comprises at least one main body formed by the internal body and the external layer, configured to be in contact with two rows of batteries, and at least one fluid connection pipe arranged at one end longitudinal of the main body, the fluid connection pipe being configured to allow the passage of a fluid.
On peut ainsi intégrer le dispositif intercalaire dans un dispositif de refroidissement du dispositif de stockage électrique, avec notamment des tubes de refroidissement qui présentent une forme similaire à celle du corps du dispositif intercalaire destiné à être enserré entre les rangées de batteries. Dans un contexte où les dispositifs intercalaires sont disposés en alternance au sein des rangées de batterie avec des tubes de refroidissement, la conduite de liaison est destinée à permettre le passage de fluide d’un tube de refroidissement à l’autre, sans que la conduite de liaison fluidique et le corps principal ne présentent d’interaction fluidique, le corps principal du dispositif intercalaire n’étant pas configuré pour permettre le passage d’un liquide en son sein. It is thus possible to integrate the interposer device into a cooling device of the electrical storage device, in particular with cooling tubes which have a shape similar to that of the body of the interposer device intended to be clamped between the rows of batteries. In a context where the intermediate devices are arranged alternately within the battery rows with cooling tubes, the connecting pipe is intended to allow the passage of fluid from one cooling tube to another, without the pipe fluidic connection and the main body do not exhibit fluidic interaction, the main body of the intermediate device not being configured to allow the passage of a liquid within it.
Selon une caractéristique de l’invention, le corps principal présente un profil ondulé. On tire avantage d’une telle caractéristique en ce qu’elle améliore le maintien des batteries notamment lorsque ces dernières présentent une forme cylindrique. On comprend notamment que dans une telle configuration, chacune des ondulations du corps principal du dispositif intercalaire accueille de manière alternée une des batteries de chacune des deux rangées de batteries entre lesquelles est disposé le dispositif intercalaire. According to one characteristic of the invention, the main body has a corrugated profile. We take advantage of such a characteristic in that it improves the maintenance of the batteries, particularly when the latter have a cylindrical shape. It is understood in particular that in such a configuration, each of the undulations of the main body of the intermediate device alternately accommodates one of the batteries of each of the two rows of batteries between which the intermediate device is arranged.
L’invention porte également sur un dispositif de stockage électrique comprenant au moins trois rangées de batteries, chacune des rangées de batteries s’étendant suivant une direction d’allongement principal longitudinale, les rangées de batteries étant alignées le long d’une direction transversale sécante de la direction longitudinale, le dispositif de stockage électrique comprenant au moins un dispositif intercalaire selon l’une quelconque des caractéristiques précédentes qui s’étend longitudinalement au moins entre deux des rangées de batteries et au moins un dispositif de refroidissement comprenant au moins un circuit de refroidissement qui s’étend suivant la direction longitudinale entre deux rangées de batteries et au moins un connecteur fluidique à une extrémité libre du circuit de refroidissement, le connecteur fluidique et le circuit de refroidissement étant fluidiquement connectés l’un à l’autre. The invention also relates to an electrical storage device comprising at least three rows of batteries, each of the rows of batteries extending in a direction of main longitudinal elongation, the rows of batteries being aligned along a secant transverse direction of the longitudinal direction, the storage device electric comprising at least one intermediate device according to any of the preceding characteristics which extends longitudinally at least between two of the rows of batteries and at least one cooling device comprising at least one cooling circuit which extends in the longitudinal direction between two rows of batteries and at least one fluid connector at a free end of the cooling circuit, the fluid connector and the cooling circuit being fluidly connected to each other.
On comprend que le dispositif de refroidissement assure le refroidissement des batteries en captant leurs calories via un fluide caloporteur qui circule au moins dans le circuit de refroidissement, également appelé tube de refroidissement. We understand that the cooling device ensures the cooling of the batteries by capturing their calories via a heat transfer fluid which circulates at least in the cooling circuit, also called a cooling tube.
Selon une caractéristique de l’invention, l’au moins un dispositif intercalaire et l’au moins un dispositif de refroidissement sont disposés de manière alternée entre les rangées de batteries, le connecteur fluidique du dispositif de refroidissement et la conduite de liaison fluidique du dispositif intercalaire étant connectés fluidiquement l’un de l’autre. According to one characteristic of the invention, the at least one intermediate device and the at least one cooling device are arranged alternately between the rows of batteries, the fluid connector of the cooling device and the fluid connection pipe of the device interlayer being fluidly connected to each other.
En d’autres termes, au moins une rangée de batteries est disposée entre le dispositif intercalaire et le dispositif de refroidissement selon la direction transversale. Ainsi, on comprend que la liaison fluidique entre le connecteur fluidique et la conduite de liaison fluidique permet au fluide caloporteur d’être acheminé d’un tube de refroidissement à l’autre malgré la disposition alternée du dispositif intercalaire et du dispositif de refroidissement entre les rangées de batteries. In other words, at least one row of batteries is arranged between the interposer device and the cooling device in the transverse direction. Thus, it is understood that the fluid connection between the fluid connector and the fluid connection pipe allows the heat transfer fluid to be conveyed from one cooling tube to the other despite the alternating arrangement of the intermediate device and the cooling device between the rows of batteries.
Selon une caractéristique de l’invention, le dispositif de refroidissement est en aluminium. Un tel matériau présente notamment des propriétés thermiques optimales. According to one characteristic of the invention, the cooling device is made of aluminum. Such a material notably has optimal thermal properties.
Selon une caractéristique de l’invention, le tube de refroidissement du dispositif de refroidissement présente un profil ondulé. According to one characteristic of the invention, the cooling tube of the cooling device has a corrugated profile.
Selon une caractéristique de l’invention, les ondulations du tube de refroidissement du dispositif de refroidissement et/ ou du corps principal du dispositif intercalaire présentent une complémentarité de forme avec une forme cylindrique des batteries. According to one characteristic of the invention, the undulations of the cooling tube of the cooling device and/or of the main body of the interposer device have a complementary shape with a cylindrical shape of the batteries.
L’invention porte également sur un procédé de fabrication d’un dispositif intercalaire selon l’une quelconque des caractéristiques précédentes, le procédé mettant en œuvre le premier matériau, le deuxième matériau et un dispositif de mélange comprenant au moins une ouverture d’entrée et un organe hélicoïdal disposé dans un volume interne du dispositif de mélange, le procédé comprenant au moins une première étape au cours de laquelle on mélange le premier matériau avec le deuxième matériau de telle sorte à obtenir un mélange comprenant au moins 70% du premier matériau, au moins une deuxième étape au cours de laquelle on introduit le mélange dans le dispositif de mélange par l’ouverture d’entrée puis on met en rotation l’organe hélicoïdal afin qu’il sépare le premier matériau et le deuxième matériau de telle sorte que le deuxième matériau enrobe le premier matériau.The invention also relates to a method of manufacturing an interlayer device according to any of the preceding characteristics, the method using the first material, the second material and a mixing device comprising at least one inlet opening and a helical member arranged in an internal volume of the mixing device, the method comprising at least a first step during which the first material is mixed with the second material so as to obtain a mixture comprising at least 70% of the first material, at least a second step during which the mixture is introduced into the mixing device through the inlet opening then the helical member is rotated so that it separates the first material and the second material such that the second material coats the first material.
Selon une caractéristique du procédé, le dispositif de mélange comprend au moins une ouverture de sortie, de préférence opposée à son ouverture d’entrée, le procédé comprenant au moins une troisième étape au cours de laquelle le mélange est expulsé du dispositif de mélange par la rotation de l’organe hélicoïdal et de telle sorte à obtenir le corps principal du dispositif intercalaire en sortie de l’organe de mélange. According to one characteristic of the process, the mixing device comprises at least one outlet opening, preferably opposite its inlet opening, the process comprising at least a third step during which the mixture is expelled from the mixing device by the rotation of the helical member and in such a way as to obtain the main body of the intermediate device at the outlet of the mixing member.
D’autres caractéristiques et avantages de l’invention apparaîtront encore au travers de la description qui suit d’une part, et de plusieurs exemples de réalisation donnés à titre indicatif et non limitatif en référence aux dessins schématiques annexés d’autre part, sur lesquels : Other characteristics and advantages of the invention will appear further through the description which follows on the one hand, and several examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which :
[fig 1] est une vue schématique de dessus d’un dispositif de stockage électrique selon l’invention ; [fig 1] is a schematic top view of an electrical storage device according to the invention;
[fig 2] est une vue rapprochée du dispositif de stockage électrique de la figure 1 montrant un agencement alternée d’un dispositif intercalaire et d’un dispositif de refroidissement entre des rangées de batteries ; [fig 2] is a close-up view of the electrical storage device of Figure 1 showing an alternating arrangement of an interposer device and a cooling device between rows of batteries;
[fig 3] est une vue en coupe transversale et longitudinale du dispositif intercalaire de la figure 2 ; [fig 4] est une vue en coupe longitudinale d’un dispositif de mélange utilisé dans un procédé de fabrication du dispositif intercalaire selon l’invention.[fig 3] is a cross-sectional and longitudinal view of the insert device of Figure 2; [fig 4] is a longitudinal sectional view of a mixing device used in a method of manufacturing the interlayer device according to the invention.
L’invention porte sur un dispositif de stockage électrique 1, visible à la figure 1, apte notamment à équiper un véhicule automobile à motorisation électrique ou hybride. Un tel système de stockage électrique 1 est notamment destiné à fournir une énergie électrique au véhicule automobile en vue de son déplacement. The invention relates to an electrical storage device 1, visible in Figure 1, capable in particular of equipping a motor vehicle with an electric or hybrid engine. Such an electrical storage system 1 is intended in particular to provide electrical energy to the motor vehicle for its movement.
A cette fin, le dispositif de stockage électrique 1 comprend une pluralité de batteries 2 assurant le stockage de l’énergie électrique et agencées au sein d’un coffre de batterie 26. Selon l’exemple de l’invention illustré, les batteries 2 sont ici de forme cylindrique. De manière plus précise, les batteries 2 sont arrangées en rangées 4 de batteries 2 et de telle sorte que le dispositif de stockage électrique 1 comprenne au moins trois rangées 4 de batteries 2. Il convient de considérer que le dispositif de stockage électrique 1 peut comprendre plus de trois rangées 4 de batteries 2 mais que l’invention sera décrite dans la suite de la description avec uniquement trois rangées 4 de batteries 2, l’ensemble des caractéristiques décrites en rapport avec les rangées 4 de batteries 2 s’appliquant mutatis mutandis à une quantité indéterminée de rangées 4 de batteries 2. To this end, the electrical storage device 1 comprises a plurality of batteries 2 ensuring the storage of electrical energy and arranged within a battery box 26. According to the example of the invention illustrated, the batteries 2 are here in a cylindrical shape. More precisely, the batteries 2 are arranged in rows 4 of batteries 2 and such that the electrical storage device 1 comprises at least three rows 4 of batteries 2. It should be considered that the electrical storage device 1 can comprise more than three rows 4 of batteries 2 but that the invention will be described in the remainder of the description with only three rows 4 of batteries 2, all of the characteristics described in relation to the rows 4 of batteries 2 applying mutatis mutandis to an indeterminate quantity of rows 4 of batteries 2.
Selon l’invention, chacune des rangées 4 de batteries 2 s’étend suivant une direction d’allongement principal P longitudinale L, les rangées 4 de batteries 2 étant disposés en parallèles les unes des autres selon une direction transversale T sécante de la direction longitudinale L. Afin de fonctionner de manière optimale, les rangées 4 de batteries 2 sont à distance les unes des autres selon la direction transversale T et les batteries 2 sont espacées les unes des autres selon la direction longitudinale L au sein d’une même rangée 4 de batteries 2. On comprend qu’un tel espacement longitudinal L et transversal T entre les batteries 2 limite les phénomènes de surchauffe au sein du dispositif de stockage électrique 1. According to the invention, each of the rows 4 of batteries 2 extends in a direction of main elongation P longitudinal L, the rows 4 of batteries 2 being arranged in parallel to each other in a transverse direction T intersecting the longitudinal direction L. In order to operate optimally, the rows 4 of batteries 2 are spaced apart from each other in the transverse direction T and the batteries 2 are spaced from each other in the longitudinal direction L within the same row 4 of batteries 2. It is understood that such longitudinal spacing L and transverse spacing T between the batteries 2 limits overheating phenomena within the electrical storage device 1.
Un matériau de collage 28 est injecté dans le coffre de batteries 26 et a pour fonction de combler ces différents espacements et de figer la position des batteries les unes par rapport aux autres. Selon l’invention, le dispositif de stockage électrique i comprend au moins un dispositif intercalaire 6 qui s’étend longitudinalement au moins entre deux des rangées 4 de batteries 2. Le dispositif intercalaire 6 participe notamment au maintien des deux rangées 4 de batteries 2 entre elles. Par ailleurs, le dispositif intercalaire 6 présente au moins en partie un profil ondulé, visible à la figure 2, afin de présenter une complémentarité de forme avec les batteries 2 cylindriques, une telle complémentarité de forme assurant le maintien des batteries 2 au sein des rangées 4 de batteries 2. Le dispositif intercalaire 6 sera notamment détaillé plus loin dans la suite de la description, aux figures 2 et 3. A bonding material 28 is injected into the battery box 26 and has the function of filling these different spacings and fixing the position of the batteries relative to each other. According to the invention, the electrical storage device i comprises at least one intermediate device 6 which extends longitudinally at least between two of the rows 4 of batteries 2. The intermediate device 6 participates in particular in maintaining the two rows 4 of batteries 2 between they. Furthermore, the intermediate device 6 has at least partly a corrugated profile, visible in Figure 2, in order to present a complementarity of shape with the cylindrical batteries 2, such complementarity of shape ensuring the maintenance of the batteries 2 within the rows 4 of batteries 2. The intermediate device 6 will be detailed in particular later in the remainder of the description, in Figures 2 and 3.
Dans l’exemple illustré, le dispositif de stockage électrique 1 comprend au moins un dispositif de refroidissement 8, visible aux figures 1 et 2, qui s’étend suivant la direction longitudinale L entre deux rangées 4 de batteries 2. Le dispositif de refroidissement 8 comprend au moins un circuit de refroidissement, ou tube de refroidissement, 10 qui s’étend suivant la direction longitudinale L entre deux rangées 4 de batteries 2, et au moins un connecteur fluidique 12 qui s’étend à une extrémité libre 14 du circuit de refroidissement 10. On comprend que le circuit de refroidissement 10 assure la circulation d’un fluide caloporteur entre les batteries 2 des deux rangées 4 de batteries 2 entre lesquelles il s’étend, assurant ainsi le refroidissement de ces dernières en captant leurs calories. On comprend par ailleurs que le connecteur fluidique 12 assure l’acheminement du fluide caloporteur vers le circuit de refroidissement 10 de tel sorte que ce dernier capte les calories des batteries afin de les refroidir. En d’autres termes, le connecteur fluidique 12 et le circuit de refroidissement 10 sont fluidiquement connectés l’un à l’autre. Le connecteur fluidique 12 est par ailleurs relié directement ou indirectement à un réservoir de stockage de fluide caloporteur, ici non visible. In the example illustrated, the electrical storage device 1 comprises at least one cooling device 8, visible in Figures 1 and 2, which extends in the longitudinal direction L between two rows 4 of batteries 2. The cooling device 8 comprises at least one cooling circuit, or cooling tube, 10 which extends in the longitudinal direction L between two rows 4 of batteries 2, and at least one fluid connector 12 which extends to a free end 14 of the cooling circuit. cooling 10. It is understood that the cooling circuit 10 ensures the circulation of a heat transfer fluid between the batteries 2 of the two rows 4 of batteries 2 between which it extends, thus ensuring the cooling of the latter by capturing their calories. It is also understood that the fluid connector 12 ensures the routing of the heat transfer fluid towards the cooling circuit 10 so that the latter captures the calories from the batteries in order to cool them. In other words, the fluid connector 12 and the cooling circuit 10 are fluidly connected to each other. The fluid connector 12 is also connected directly or indirectly to a heat transfer fluid storage tank, here not visible.
Selon l’exemple de l’invention illustré de la figure 2, et sans que cela soit limitatif de l’invention, le connecteur fluidique 12 peut comprendre deux conduits de circulation 13, de telle sorte que l’un des conduits de circulation corresponde à la conduite d’entrée du fluide caloporteur dans le circuit de refroidissement, et que l’autre corresponde à la conduite de sortie du fluide caloporteur du circuit de refroidissement. Le tube de refroidissement, comme le dispositif intercalaire, peut présenter une complémentarité de forme avec la forme des batteries 8, et notamment présenter un profil ondulé de sorte à coopérer de manière optimale avec la forme cylindrique des batteries 2. According to the example of the invention illustrated in Figure 2, and without this being limiting to the invention, the fluid connector 12 can comprise two circulation conduits 13, such that one of the circulation conduits corresponds to the inlet pipe for the heat transfer fluid into the cooling circuit, and the other corresponds to the outlet pipe for the heat transfer fluid from the cooling circuit. The cooling tube, like the intermediate device, can have a complementary shape with the shape of the batteries 8, and in particular have a corrugated profile so as to cooperate optimally with the cylindrical shape of the batteries 2.
Selon une caractéristique de l’invention visible aux figures i et 2, l’au moins un dispositif intercalaire 6 et l’au moins un dispositif de refroidissement 8 sont disposés de manière alternée entre les rangées 4 de batteries 2. On comprend notamment que le dispositif intercalaire 6 et le dispositif de refroidissement 8 ne s’étendent pas entre deux mêmes rangées 4 de batteries 2. Plus particulièrement, le dispositif intercalaire 6 et le dispositif de refroidissement 8 sont disposés de manière alternée entre les rangées 4 de batteries 2 selon la direction transversale T. Ainsi, on comprend qu’au moins une rangée 4 de batteries 2 est disposée entre le dispositif intercalaire 6 et le dispositif de refroidissement 8 selon la direction transversale T. According to a characteristic of the invention visible in Figures i and 2, the at least one intermediate device 6 and the at least one cooling device 8 are arranged alternately between the rows 4 of batteries 2. It is understood in particular that the intermediate device 6 and the cooling device 8 do not extend between two same rows 4 of batteries 2. More particularly, the intermediate device 6 and the cooling device 8 are arranged alternately between the rows 4 of batteries 2 according to the transverse direction T. Thus, we understand that at least one row 4 of batteries 2 is arranged between the intermediate device 6 and the cooling device 8 in the transverse direction T.
Le dispositif de refroidissement 8 et le dispositif intercalaire se distinguent l’un de l’autre d’une part du fait de leur structure interne, avec le dispositif de refroidissement qui est apte à être traversé par un fluide de refroidissement alors que le tube ne l’est pas, et d’autre part du fait du matériau qui les compose. The cooling device 8 and the intermediate device are distinguished from each other on the one hand due to their internal structure, with the cooling device which is capable of being passed through by a cooling fluid while the tube does not is not, and on the other hand due to the material which composes them.
Le dispositif de refroidissement est réalisé dans un matériau thermiquement conducteur, et notamment en aluminium qui présente en outre un avantage en termes de poids. The cooling device is made of a thermally conductive material, and in particular aluminum which also has an advantage in terms of weight.
Le dispositif intercalaire est lui réalisé à base de matériau thermoplastique, et notamment de polypropylène, puisque ce dispositif intercalaire n’a pour seule fonction que créer l’espacement souhaité entre deux rangées de batteries successives et qu’il est souhaité d’avoir un matériau peu coûteux et facile à conformer. The intermediate device is made from a thermoplastic material, and in particular polypropylene, since this intermediate device has the sole function of creating the desired spacing between two rows of successive batteries and it is desired to have a material inexpensive and easy to conform.
Le dispositif intercalaire 6 va maintenant être décrit plus en détail au moyen des figures 2 et 3. On comprend par ailleurs que seul un dispositif intercalaire 6 va être décrit en détail dans la suite de la description mais que l’ensemble des caractéristiques décrites s’appliquent mutatis mutandis à une pluralité de dispositifs intercalaire 6 du dispositif de stockage électrique 1. Le dispositif intercalaire 6 selon l’invention s’étend principalement selon la direction longitudinale L et comprend au moins un corps principal 16 et une conduite de liaison fluidique 18 disposée à une extrémité longitudinale 20 du corps principal 16. The intermediate device 6 will now be described in more detail by means of Figures 2 and 3. It will also be understood that only an intermediate device 6 will be described in detail in the remainder of the description but that all of the characteristics described are apply mutatis mutandis to a plurality of interlayer devices 6 of the electrical storage device 1. The intermediate device 6 according to the invention extends mainly in the longitudinal direction L and comprises at least one main body 16 and a fluid connection pipe 18 disposed at a longitudinal end 20 of the main body 16.
La conduite de liaison fluidique 18 est configurée pour permettre le passage d’un fluide, ici le fluide caloporteur circulant dans le dispositif de refroidissement 8, afin notamment de permettre le passage de ce fluide d’un dispositif de refroidissement 8 à l’autre. Tel que cela a été évoqué, le corps principal 16 du dispositif intercalaire 6 n’est pas configuré pour le passage d’un fluide, de sorte que la fixation de la conduite de liaison fluidique 18 sur le corps principal 16 ne nécessite pas de connexion fluidique. The fluid connection pipe 18 is configured to allow the passage of a fluid, here the heat transfer fluid circulating in the cooling device 8, in particular to allow the passage of this fluid from one cooling device 8 to the other. As mentioned, the main body 16 of the intermediate device 6 is not configured for the passage of a fluid, so that the fixing of the fluid connection pipe 18 on the main body 16 does not require connection fluidics.
La conduite de liaison fluidique 18 et le connecteur fluidique 12 du dispositif de refroidissement 8 sont configurés pour être connectés fluidiquement l’un à l’autre. Ainsi, une telle communication fluidique entre la conduite de liaison fluidique 18 et le connecteur fluidique 12 assure l’acheminement en fluide caloporteur au circuit de refroidissement 10 malgré la disposition en alternance du dispositif intercalaire 6 et du dispositif de refroidissement 8 entre les rangées 4 de batteries 2. The fluid connection pipe 18 and the fluid connector 12 of the cooling device 8 are configured to be fluidly connected to each other. Thus, such fluid communication between the fluid connection pipe 18 and the fluid connector 12 ensures the delivery of heat transfer fluid to the cooling circuit 10 despite the alternating arrangement of the intermediate device 6 and the cooling device 8 between the rows 4 of batteries 2.
Tel que visible sur la figure 2, la conduite de liaison fluidique 18 peut comprendre deux canaux de circulation 19 de telle sorte à coopérer avec les conduits de circulation 13 du dispositif de refroidissement 8 tel qu’évoqués précédemment. As visible in Figure 2, the fluid connection pipe 18 can comprise two circulation channels 19 so as to cooperate with the circulation conduits 13 of the cooling device 8 as mentioned previously.
Tel que cela est visible schématiquement sur la figure 3, le dispositif intercalaire 6 selon l’invention comprend un corps interne 22 recouvert d’une couche externe 24, le corps interne 22 et la couche externe 24 formant notamment le corps principal 16 évoqué précédemment. Notamment, la couche externe 24 du corps principal 16 entoure le corps interne de manière à former la surface externe du corps principal, destinée à être au contact des deux rangées 4 de batteries 2 entre lesquelles est disposé le dispositif intercalaire 6 et à être au contact du matériau de collage 28 injecté dans le coffre de batteries. Selon une caractéristique de l’invention, le corps interne 22 et la couche externe 24 sont faits respectivement d’un premier matériau et d’un deuxième matériau qui est différent du premier matériau. Notamment, les deux matériaux diffèrent par la tension de surface qui leur est propre, cette tension de surface différente pouvant notamment être obtenue par un additif ajouté au polypropylène servant de matériau de base à l’ensemble du dispositif intercalaire. As can be seen schematically in Figure 3, the intermediate device 6 according to the invention comprises an internal body 22 covered with an external layer 24, the internal body 22 and the external layer 24 forming in particular the main body 16 mentioned above. In particular, the external layer 24 of the main body 16 surrounds the internal body so as to form the external surface of the main body, intended to be in contact with the two rows 4 of batteries 2 between which the intermediate device 6 is arranged and to be in contact bonding material 28 injected into the battery box. According to one characteristic of the invention, the internal body 22 and the external layer 24 are made respectively of a first material and a second material which is different from the first material. In particular, the two materials differ in the surface tension specific to them, this different surface tension being able in particular to be obtained by an additive added to the polypropylene serving as the base material for the entire interlayer device.
Plus particulièrement, le deuxième matériau, utilisé pour réaliser la couche externe destinée à être au contact du matériau de collage 28, présente une tension de surface supérieure à une tension de surface du premier matériau, utilisé pour réaliser le corps interne. Une tension de surface élevée du deuxième matériau permet à ce dernier de pouvoir se lier chimiquement plus aisément avec le matériau de collage, par exemple formé par de la résine époxy. More particularly, the second material, used to make the external layer intended to be in contact with the bonding material 28, has a surface tension greater than a surface tension of the first material, used to make the internal body. A high surface tension of the second material allows the latter to be able to chemically bond more easily with the bonding material, for example formed by epoxy resin.
Par ailleurs, les deux matériaux utilisés pour réaliser le dispositif intercalaire diffèrent par leur taux de viscosité. Le premier matériau, utilisé pour réaliser le corps interne, présente un premier taux de viscosité et le deuxième matériau, utilisé pour réaliser la couche externe, présente un deuxième taux de viscosité, le premier taux de viscosité étant supérieur au deuxième taux de viscosité. Furthermore, the two materials used to make the interlayer device differ in their viscosity rate. The first material, used to make the internal body, has a first viscosity rate and the second material, used to make the outer layer, has a second viscosity rate, the first viscosity rate being greater than the second viscosity rate.
Une telle différence de viscosité entre le premier matériau et le deuxième matériau est notamment avantageuse dans un procédé de fabrication du dispositif intercalaire 6 selon l’invention, pour permettre au deuxième matériau de se positionner en recouvrement du premier matériau au cours de la phase d’extrusion, un tel procédé étant détaillé plus loin dans la suite de la description détaillée. Such a difference in viscosity between the first material and the second material is particularly advantageous in a method of manufacturing the intermediate device 6 according to the invention, to allow the second material to position itself over the first material during the phase of extrusion, such a process being detailed later in the remainder of the detailed description.
Habituellement, à titre d’exemple non limitatif, la fluidité du PP greffé est généralement comprise entre iogr/10 min à 8ogr/io min tandis que la fluidité du PP simple, dit « à cœur » est généralement comprise 10 gr/ 10 min mini à 20 gr/iomin. Ces valeurs sont données en MFI. le MFI est un indice de fluidité, donc comparable à une viscosité. Le MFI représente la qtté de matière qui s'écoule dans une filière, avec un poids et à une température donnés: il s'exprime en g/ lomin. Usually, as a non-limiting example, the fluidity of grafted PP is generally between iogr/10 min to 8ogr/io min while the fluidity of simple PP, called "at core" is generally between 10 gr/10 min min. at 20 gr/iomin. These values are given in MFI. MFI is a fluidity index, therefore comparable to viscosity. The MFI represents the quantity of material which flows in a die, with a given weight and at a given temperature: it is expressed in g/lomin.
L'écart minimum entre les deux matières doit être au minimum de 15% pour garantir une démixtion. La fluidité du PP greffé doit être toujours supérieure à la fluidité du PP à coeur. The minimum difference between the two materials must be at least 15% to guarantee demixing. The fluidity of the grafted PP must always be greater than the fluidity of the PP at the core.
En d’autres termes le matériau interne doit être plus visqueux et donc présenter un MFI faible, tandis que le matériau externe doit être en comparaison plus fluide et donc présenter un MFI plus important. In other words, the internal material must be more viscous and therefore have a low MFI, while the external material must be more fluid in comparison and therefore have a higher MFI.
Selon un exemple non limitatif de l’invention, le premier matériau est du polypropylène et le deuxième matériau est du polypropylène greffé par anhydride maléique. Par ailleurs, la conduite de liaison fluidique 18 du dispositif intercalaire 6 peut être par exemple faite en polypropylène. According to a non-limiting example of the invention, the first material is polypropylene and the second material is polypropylene grafted with maleic anhydride. Furthermore, the fluid connection pipe 18 of the intermediate device 6 can for example be made of polypropylene.
Tel qu’évoqué précédemment, le dispositif intercalaire 6 présente au moins en partie une complémentarité de forme avec les batteries 2. De manière plus précise, le corps principal 16 du dispositif intercalaire 6 présente une complémentarité de forme avec les batteries 2 et présente à cette fin un profil ondulé. L’emboitement des batteries 2 dans les ondulations du corps principal 16 du dispositif intercalaire 6 permet d’améliorer le maintien desdites batteries 2 au sein du dispositif de stockage électrique 1 en coopération avec le dispositif de refroidissement 8 décrit précédemment. La disposition précédemment évoquée d’un corps interne et d’une couche externe, aux propriétés de viscosité et de tension de surface différentes, prend notamment effet sur toute l’étendue longitudinale du corps principal 16 du dispositif intercalaire 6. As mentioned previously, the intermediate device 6 presents at least in part a complementarity of shape with the batteries 2. More precisely, the main body 16 of the intermediate device 6 presents a complementarity of shape with the batteries 2 and presents at this end a wavy profile. The nesting of the batteries 2 in the undulations of the main body 16 of the intermediate device 6 makes it possible to improve the maintenance of said batteries 2 within the electrical storage device 1 in cooperation with the cooling device 8 described previously. The previously mentioned arrangement of an internal body and an external layer, with different viscosity and surface tension properties, takes effect in particular over the entire longitudinal extent of the main body 16 of the intermediate device 6.
On tire avantage du dispositif intercalaire 6 tel qu’il vient d’être décrit en ce qu’il permet d’améliorer l’adhérence du matériau de collage 28 sur le corps principal 16 du dispositif intercalaire 6, tel que visible à la figure 1. L’ajout d’un additif et notamment ici d’anhydride maléique sur la surface externe du corps principal 16, permet d’élever localement la densité de surface du dispositif intercalaire et de favoriser la coopération de la couche externe avec le matériau de collage. Plus particulièrement, lors de la fabrication du dispositif de stockage électrique i, les au moins trois rangées 4 de batteries 2 sont assemblées les unes avec les autres au moyen du dispositif intercalaire 6 et du dispositif de refroidissement 8 tel que cela a été décrit précédemment, l’ensemble étant disposé dans le coffre 26 de batterie 2, visible à la figure 1, rempli par la suite du matériau de collage 28 afin que celui-ci bloque en position les différents éléments du dispositif de stockage électrique 1. Ainsi, la composition particulière du corps principal 16 du dispositif intercalaire 6 assure une adhérence optimale du matériau de collage 28 avec ledit corps principal 16 et notamment avec la couche externe 24. On améliore ainsi le maintien du dispositif intercalaire 6 au sein du dispositif de stockage électrique 1, et ainsi le maintien des batteries. We take advantage of the intermediate device 6 as it has just been described in that it makes it possible to improve the adhesion of the bonding material 28 on the main body 16 of the intermediate device 6, as visible in Figure 1 The addition of an additive and in particular here of maleic anhydride on the external surface of the main body 16, makes it possible to locally increase the surface density of the interlayer device and to promote cooperation of the external layer with the bonding material . More particularly, during the manufacture of the electrical storage device i, the at least three rows 4 of batteries 2 are assembled with each other by means of the intermediate device 6 and the cooling device 8 as described previously, the assembly being arranged in the box 26 of battery 2, visible in Figure 1, subsequently filled with the bonding material 28 so that it blocks in position the different elements of the electrical storage device 1. Thus, the composition particular of the main body 16 of the intermediate device 6 ensures optimal adhesion of the bonding material 28 with said main body 16 and in particular with the external layer 24. This improves the maintenance of the intermediate device 6 within the electrical storage device 1, and thus maintaining the batteries.
Un procédé de fabrication du dispositif intercalaire 6 va maintenant être décrit en rapport notamment avec la figure 4. A method of manufacturing the intermediate device 6 will now be described in particular in relation to Figure 4.
Le procédé de fabrication selon l’invention met notamment en œuvre un dispositif de mélange 30 comprenant au moins une ouverture d’entrée 32 et une ouverture de sortie 34 opposée à son ouverture d’entrée 32 selon une direction d’allongement principal du dispositif de mélange. Le dispositif de mélange 30 comprend par ailleurs un volume interne 36 délimité par une paroi périphérique 38 dans laquelle sont formées les ouvertures d’entrée 32 et de sortie 34. Ainsi, les ouvertures d’entrée 32 et de sortie 34 assurent la communication fluidique entre le volume interne 36 du dispositif de mélange 30 avec un environnement extérieur à ce dernier. Le dispositif de mélange 30 comprend par ailleurs un organe hélicoïdal 40 disposé dans son volume interne 36, l’organe hélicoïdale 40 s’étendant sensiblement sur toute la longueur du dispositif de mélange 30 selon sa direction d’allongement principal. The manufacturing method according to the invention notably implements a mixing device 30 comprising at least one inlet opening 32 and an outlet opening 34 opposite its inlet opening 32 in a direction of main elongation of the mixing device. blend. The mixing device 30 further comprises an internal volume 36 delimited by a peripheral wall 38 in which the inlet 32 and outlet 34 openings are formed. Thus, the inlet 32 and outlet 34 openings ensure fluid communication between the internal volume 36 of the mixing device 30 with an environment external to the latter. The mixing device 30 further comprises a helical member 40 disposed in its internal volume 36, the helical member 40 extending substantially over the entire length of the mixing device 30 in its direction of main elongation.
Le procédé comprend au moins une première étape au cours de laquelle on mélange le premier matériau avec le deuxième matériau de telle sorte à obtenir un mélange 41. Le mélange 41 peut notamment comprendre au moins 70% du premier matériau. Dans une deuxième étape, le mélange 41 obtenu lors de la première étape est introduit dans le volume interne 36 du dispositif de mélange 30, par l’ouverture d’entrée 32, puis l’organe hélicoïdal 40 est entrainé en rotation de telle sorte qu’il sépare le premier matériau et le deuxième matériau afin que le deuxième matériau enrobe le premier matériau. Une telle séparation du premier matériau et du deuxième matériau au sein du volume interne 36 du dispositif de mélange 30 est notamment mise en œuvre de par la différence de viscosité entre ces matériaux tel qu’évoqué précédemment. Le deuxième matériau, moins visqueux, tend à se déplacer plus vite et à venir au contact de la surface interne de la paroi périphérique, de sorte que le premier matériau, plus visqueux que le deuxième matériau, est séparé de cette surface interne par la présence du deuxième matériau. The method comprises at least a first step during which the first material is mixed with the second material so as to obtain a mixture 41. The mixture 41 may in particular comprise at least 70% of the first material. In a second step, the mixture 41 obtained during the first step is introduced into the internal volume 36 of the device mixture 30, through the inlet opening 32, then the helical member 40 is rotated so that it separates the first material and the second material so that the second material coats the first material. Such a separation of the first material and the second material within the internal volume 36 of the mixing device 30 is notably implemented due to the difference in viscosity between these materials as mentioned previously. The second material, less viscous, tends to move faster and come into contact with the internal surface of the peripheral wall, so that the first material, more viscous than the second material, is separated from this internal surface by the presence of the second material.
Une fois cette stratification opérée entre le premier matériau et le deuxième matériau, le procédé comprend au moins une troisième étape au cours de laquelle le mélange est expulsé du dispositif de mélange 30 par la rotation de l’organe hélicoïdal 40 et de telle sorte à obtenir une matrice du corps principal 16 du dispositif intercalaire 6 en sortie de l’organe de mélange 30 via l’ouverture de sortie 34. Le corps principal peut ensuite être conformé pour prendre la forme ondulée précédemment évoquée. Once this stratification has been carried out between the first material and the second material, the method comprises at least a third step during which the mixture is expelled from the mixing device 30 by the rotation of the helical member 40 and in such a way as to obtain a matrix of the main body 16 of the intermediate device 6 at the outlet of the mixing member 30 via the outlet opening 34. The main body can then be shaped to take the wavy shape previously mentioned.
Le dispositif intercalaire est ensuite obtenu via la réalisation d’au moins une étape additionnelle, ici quatrième étape, au cours de laquelle la conduite de liaison fluidique 18 est solidarisée à l’extrémité longitudinale 20 du corps principal 16 obtenu à l’issu des trois premières étapes du procédé. La solidarisation entre la conduite de liaison fluidique 18 et le corps principal 16 peut notamment s’effectuer par exemple par brasage ou encore par collage, ou par tout autre moyen assurant une liaison étanche entre ceux-ci. The intermediate device is then obtained via the completion of at least one additional step, here fourth step, during which the fluid connection pipe 18 is secured to the longitudinal end 20 of the main body 16 obtained from the three first stages of the process. The connection between the fluid connection pipe 18 and the main body 16 can in particular be carried out for example by brazing or by bonding, or by any other means ensuring a tight connection between them.
Tel qu’elle vient d’être décrite, l’invention répond bien aux buts qu’elle s’était fixés, à savoir l’obtention d’un dispositif intercalaire qui permette une bonne tenue d’un matériau de collage sans qu’il soit nécessaire de réaliser ce dispositif intercalaire dans un matériau coûteux. As it has just been described, the invention responds well to the goals that it had set for itself, namely obtaining an intermediate device which allows good hold of a bonding material without it It is necessary to make this interlayer device in an expensive material.
Bien sûr, l’invention n’est pas limitée aux exemples qui viennent d’être décrits et de nombreux aménagements peuvent être apportés à ces exemples sans sortir du cadre de l’invention, dès lors qu’un dispositif intercalaire est formé au moins en partie de deux matériaux différents, avec le matériau de recouvrement, destiné à être au contact d’un matériau de collage dans un coffre de batterie, qui présente une tension de surface supérieure à la tension de surface moyenne du reste du dispositif intercalaire. Of course, the invention is not limited to the examples which have just been described and numerous adjustments can be made to these examples without departing from the scope of the invention, since an intermediate device is formed at least in part of two different materials, with the cover material, intended to be in contact with a bonding material in a battery box, which has a surface tension greater than the average surface tension of the rest of the device interlayer.

Claims

REVENDICATIONS
1- Dispositif intercalaire (6) configuré pour s’étendre entre deux rangées (4) de batteries (2) d’un dispositif de stockage électrique (1), le dispositif intercalaire (6) s’étendant principalement selon une direction longitudinale (L) et présentant au moins un corps interne (22) recouvert d’une couche externe (24), le corps interne (22) et la couche externe (24) étant faits respectivement d’un premier matériau et d’un deuxième matériau différent du premier matériau, le deuxième matériau présentant une tension de surface supérieure à une tension de surface du premier matériau. 1- Interposer device (6) configured to extend between two rows (4) of batteries (2) of an electrical storage device (1), the interposer device (6) extending mainly in a longitudinal direction (L ) and having at least one internal body (22) covered with an external layer (24), the internal body (22) and the external layer (24) being made respectively of a first material and a second material different from the first material, the second material having a surface tension greater than a surface tension of the first material.
2- Dispositif intercalaire (6) selon la revendication précédente, dans lequel le premier matériau comprend un premier taux de viscosité et le deuxième matériau comprend un deuxième taux de viscosité, le premier taux de viscosité étant supérieur au deuxième taux de viscosité, de préférence au moins supérieur de 15%, préférentiellement 50%, de préférence supérieur de 100% par rapport au deuxième taux de viscosité du deuxième matériau. 2- Interlayer device (6) according to the preceding claim, in which the first material comprises a first viscosity rate and the second material comprises a second viscosity rate, the first viscosity rate being greater than the second viscosity rate, preferably at less higher than 15%, preferably 50%, preferably higher than 100% compared to the second viscosity rate of the second material.
3- Dispositif intercalaire (6) selon l’une quelconque des revendications précédentes, dans lequel le premier matériau est du polypropylène. 3- Interlayer device (6) according to any one of the preceding claims, in which the first material is polypropylene.
4- Dispositif intercalaire (6) selon l’une quelconque des revendications précédentes, dans lequel le deuxième matériau est du polypropylène greffé par anhydride maléique. 4- Interlayer device (6) according to any one of the preceding claims, in which the second material is polypropylene grafted with maleic anhydride.
5- Dispositif intercalaire (6) selon l’une quelconque des revendications précédentes, comprenant au moins un corps principal (16) formé par le corps interne (22) et la couche externe (24), configuré pour être au contact de deux rangées (4) de batteries (2), et au moins une conduite de liaison fluidique (18) disposée à une extrémité longitudinale (20) du corps principal (16), la conduite de liaison fluidique (18) étant configurée pour permettre le passage d’un fluide. 5- Interlayer device (6) according to any one of the preceding claims, comprising at least one main body (16) formed by the internal body (22) and the external layer (24), configured to be in contact with two rows ( 4) of batteries (2), and at least one fluid connection pipe (18) arranged at a longitudinal end (20) of the main body (16), the fluid connection pipe (18) being configured to allow the passage of a fluid.
6- Dispositif de stockage électrique (1) comprenant au moins trois rangées (4) de batteries (2), chacune des rangées (4) de batteries (2) s’étendant suivant une direction d’allongement principal (P) longitudinale (L), les rangées (4) de batteries (2) étant alignées le long d’une direction transversale (T) sécante de la direction longitudinale (L), le dispositif de stockage électrique (i) comprenant au moins un dispositif intercalaire (6) selon l’une quelconque des revendications précédentes qui s’étend longitudinalement au moins entre deux des rangées (4) de batteries (2) et au moins un dispositif de refroidissement (8) comprenant au moins un circuit de refroidissement (10) qui s’étend suivant la direction longitudinale (L) entre deux rangées (4) de batteries (2) et au moins un connecteur fluidique (12) à une extrémité libre (14) du circuit de refroidissement (10), le connecteur fluidique (12) et le circuit de refroidissement (10) étant fluidiquement connectés l’un à l’autre. 6- Electrical storage device (1) comprising at least three rows (4) of batteries (2), each of the rows (4) of batteries (2) extending in a direction of main elongation (P) longitudinal (L ), the rows (4) of batteries (2) being aligned along a direction transverse (T) intersecting the longitudinal direction (L), the electrical storage device (i) comprising at least one intermediate device (6) according to any one of the preceding claims which extends longitudinally at least between two of the rows ( 4) of batteries (2) and at least one cooling device (8) comprising at least one cooling circuit (10) which extends in the longitudinal direction (L) between two rows (4) of batteries (2) and at least one fluid connector (12) at a free end (14) of the cooling circuit (10), the fluid connector (12) and the cooling circuit (10) being fluidly connected to each other.
7- Dispositif de stockage électrique (1) selon la revendication précédente, dans lequel l’au moins un dispositif intercalaire (6) et l’au moins un dispositif de refroidissement (8) sont disposés de manière alternée entre les rangées (4) de batteries (2) et dans lequel le connecteur fluidique (12) du dispositif de refroidissement (8) et la conduite de liaison fluidique (18) du dispositif intercalaire (6) sont connectés fluidiquement l’un de l’autre. 7- Electrical storage device (1) according to the preceding claim, in which the at least one intermediate device (6) and the at least one cooling device (8) are arranged alternately between the rows (4) of batteries (2) and in which the fluid connector (12) of the cooling device (8) and the fluid connection pipe (18) of the interposer device (6) are fluidly connected to each other.
8- Procédé de fabrication d’un dispositif intercalaire (6) selon l’une quelconque des revendications 1 à 5, le procédé mettant en œuvre le premier matériau, le deuxième matériau et un dispositif de mélange (30) comprenant au moins une ouverture d’entrée (32) et un organe hélicoïdal (40) disposé dans un volume interne (36) du dispositif de mélange (30), le procédé comprenant au moins une première étape au cours de laquelle on mélange le premier matériau avec le deuxième matériau de telle sorte à obtenir un mélange (41) comprenant au moins 70% du premier matériau, au moins une deuxième étape au cours de laquelle on introduit le mélange (41) dans le dispositif de mélange (30) par l’ouverture d’entrée (32) puis on met en rotation l’organe hélicoïdal (40) afin qu’il sépare le premier matériau et le deuxième matériau de telle sorte que le deuxième matériau enrobe le premier matériau. 8- Method for manufacturing an interlayer device (6) according to any one of claims 1 to 5, the method using the first material, the second material and a mixing device (30) comprising at least one opening of inlet (32) and a helical member (40) arranged in an internal volume (36) of the mixing device (30), the method comprising at least a first step during which the first material is mixed with the second material of such as to obtain a mixture (41) comprising at least 70% of the first material, at least a second step during which the mixture (41) is introduced into the mixing device (30) through the inlet opening ( 32) then the helical member (40) is rotated so that it separates the first material and the second material so that the second material coats the first material.
9- Procédé de fabrication selon la revendication précédente en combinaison avec la revendication 5, dans lequel le dispositif de mélange (30) comprend au moins une ouverture de sortie (34), de préférence opposée à son ouverture d’entrée (32), le procédé comprenant au moins une troisième étape au cours de laquelle le mélange est expulsé du dispositif de mélange (30) par la rotation de l’organe hélicoïdal (40) et de telle sorte à obtenir le corps principal (22) du dispositif intercalaire (6) en sortie de l’organe de mélange (30). 9- Manufacturing method according to the preceding claim in combination with claim 5, in which the mixing device (30) comprises at least one outlet opening (34), preferably opposite at its inlet opening (32), the process comprising at least a third step during which the mixture is expelled from the mixing device (30) by the rotation of the helical member (40) and such as to obtain the main body (22) of the intermediate device (6) at the outlet of the mixing member (30).
PCT/EP2023/067699 2022-07-01 2023-06-28 Insert device for electrical storage device WO2024003166A1 (en)

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FR2206774A FR3137507A1 (en) 2022-07-01 2022-07-01 Interposer device for electrical storage device

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