WO2022214571A1

WO2022214571A1 - Longitudinal plate for a thermal treatment device

Info

Publication number: WO2022214571A1
Application number: PCT/EP2022/059191
Authority: WO
Inventors: Cedric De Vaulx; Kamel Azzouz; Jeremy Blandin; Yolanda Bravo
Original assignee: Valeo Systemes Thermiques
Priority date: 2021-04-07
Filing date: 2022-04-07
Publication date: 2022-10-13
Also published as: FR3121746A1

Abstract

The present invention relates to a longitudinal plate (8) for a thermal treatment device (5), comprising a first series of orifices and a second series of orifices which respectively define a first fluid-distribution zone (11) and a second fluid-distribution zone (12), at least one orifice having a periphery that projects from the longitudinal plate (8) and is configured to act as an obstacle to the fluid, said longitudinal plate (8) comprising a heat-exchange zone (13) extending between the first fluid-distribution zone (11) and the second fluid-distribution zone (12), characterized in that the heat-exchange zone (13) comprises a plurality of openings (16), each opening (16) being configured to allow an electrical and/or electronic element (4) to pass, each opening (16) being bounded by a peripheral edge acting as an obstacle to the circulation of fluid.

Description

DESCRIPTION

TITLE OF THE INVENTION: LONGITUDINAL PLATE FOR DEVICE OF

HEAT TREATMENT

The present invention relates to the field of electronic systems and for example electrical storage systems, and it relates more particularly to heat treatment devices for such electronic systems.

The electrical and/or electronic elements of an electronic system likely to be affected by the present invention may just as well consist of components of computer servers as of components of electrical energy storage systems, in particular batteries, for motor vehicles.

An electric storage system, for example of the battery pack type, is configured within an electric or electronic device, for example an electric motor of a hybrid or electric vehicle, in order to be able to store electric energy, for example when recharging the electrical or electronic device when it is switched off and plugged in, and supplying electrical energy during the operation of the electrical or electronic device.

Such electrical storage systems, in particular the electrical storage elements which compose them, are liable to release heat during their operation or during their recharging. Thus, it is known to use heat treatment systems capable of cooling the electrical storage system when the latter reaches too high a temperature. It is more particularly known to provide a heat treatment system which is arranged outside the electrical storage system, as close as possible to the latter, in order to ensure that the calories released by the electrical storage system can be captured by the heat treatment system.

It is understood that such an electrical storage system, even in the case where it surrounds the casing delimiting the electrical storage system, can result in uneven heat treatment of all of the electrical storage elements arranged inside the casing.

The object of the invention is to offer an alternative to the thermal regulation devices of electronic systems comprising electrical or electronic components, whether they are computer servers, motor vehicle batteries or any other type of electronic systems whose the components are liable to heat up during their operation or their recharging, by proposing a thermal regulation device which is capable of bringing the electrical or electronic component to the desired temperature in a defined time. It is thus sought to propose a solution that makes it possible in particular to ensure a homogeneous heat treatment of all the electrical and/or electronic elements constituting an electronic system.

The present invention falls within this dual context by proposing a longitudinal plate for a heat treatment device of an electrical storage system, comprising a first fluid distribution zone arranged at the level of a first longitudinal end of the longitudinal plate and a second fluid distribution zone arranged at a second longitudinal end of the longitudinal plate, each fluid distribution zone comprising at least one orifice, said longitudinal plate comprising a heat exchange zone extending between the first zone fluid distribution zone and the second fluid distribution zone, the heat exchange zone being configured to allow the circulation of the fluid between two orifices, characterized in that the heat exchange zone comprises a plurality of openings, each opening being configured to allow passage of an electrical and/or electronic element through said s openings, each opening being delimited by a peripheral edge projecting from the longitudinal plate and forming an obstacle to the flow of fluid.

Thanks to the openings of the longitudinal plate, the electrical and/or electronic elements can be slid through said longitudinal plate. A superposition of said longitudinal plates during the formation of a heat treatment device with plates, involving the arrangement one above the other of openings of each of the plates and the formation of a cavity extending in the direction of the stack, thus makes it possible to arrange all the electrical and/or electronic elements as close as possible to a heat treatment device for the latter. The electrical and/or electronic elements can thus be heat treated effectively, by being arranged in the heat exchange zone of the constituent plates of the heat treatment device.

The longitudinal plate mainly extends along a two-dimensional extension plane. The heat exchange zone extends mainly in the center of the longitudinal plate and is flanked on either side by the two fluid distribution zones located at each longitudinal end of the longitudinal plate.

The orifices of the fluid distribution zones are formed in the material of the longitudinal plate. Each fluid distribution zone includes at least one orifice. In general, a fluid interacting with the longitudinal plate must be able to pass through a first orifice acting as a fluid inlet and a second orifice acting as a fluid outlet. There can therefore for example be two orifices per fluid responsible for thermally treating the electrical and/or electronic elements, for example two orifices per fluid distribution zone for two fluids circulating in the heat treatment device. A first fluid and a second fluid therefore each circulate through an inlet orifice as far as an outlet orifice, the inlet orifice and the outlet orifice possibly being arranged on the same fluid distribution zone or respectively on the two fluid distribution zones.

The heat exchange zone makes it possible to circulate the first fluid or the second fluid from the inlet orifice to the outlet orifice mentioned above. The fluid flows along the surface of the longitudinal plate near the openings, the peripheral edge of each of the openings making it possible to prevent the fluid from flowing through the openings. The openings are arranged so that the exchange zone thermal has a maximum number of openings, while guaranteeing an effective circulation of the fluid between the openings by leaving a passage zone between the openings sufficient to avoid the losses of load of the fluid, thus allowing an effective heat treatment also. The peripheral edge of each of the openings plays both a sealing role, by making it possible to prevent the fluid from flowing through the openings and coming into contact with the electrical and/or electronic elements, and a role of heat exchanger, by interfacing between the fluid flowing against one of the faces of the peripheral edge and the electric and/or electronic element inserted into the opening and in contact with the opposite face of the peripheral edge.

According to one characteristic of the invention, the longitudinal plate comprises a contour extending around the periphery of the longitudinal plate and configured to interact by direct contact with an adjacent longitudinal plate. Such a peripheral edge can for example extend at least partially projecting, the objective being to interact with an adjacent longitudinal plate by complementarity, so as to form a precise superposition between the longitudinal plates. The peripheral edge of the longitudinal plate is thus in direct contact with the adjacent longitudinal plate, and the longitudinal plates can be fixed together, for example by brazing, so as to form a sealed assembly at its periphery.

The invention also covers a heat treatment device comprising a plurality of longitudinal plates as described above, said longitudinal plates being superimposed on each other in a vertical direction perpendicular to an elongation plane of the longitudinal plates, the orifices of the first fluid distribution zone and the second fluid distribution zone of each longitudinal plate being one above the other in the vertical direction so as to form a fluid distribution duct extending mainly in the vertical direction, the openings of the heat exchange zone of each longitudinal plate being one above the other so as to form a receiving cavity extending mainly in the perpendicular vertical direction and configured to receive an electrical and/or electronic element.

Several longitudinal plates are thus superimposed perpendicular to their plane of elongation and fixed together as described above, so as to form the heat treatment device within which the circulation of at least one fluid can be put in place.

Thanks to said superposition, the orifices of the fluid distribution zones of each longitudinal plate are stacked on top of each other and several fluid distribution ducts are produced thanks to this stack. By way of example, if each longitudinal plate has two orifices per fluid distribution zone, the superposition of the plates therefore ensures the formation of two fluid distribution ducts per fluid distribution zone. It is through these fluid distribution ducts thus formed that the fluids intended to circulate in the exchange zones of the various plates enter and leave.

The edges of the orifices are dimensioned so that a periphery arranged around an orifice of a first plate is in contact with a second plate coming in direct overlapping of the first plate.

Like the orifices, each opening of the heat exchange zones of each of the longitudinal plates are positioned so as to be stacked on top of each other. The receiving cavities thus formed allow the insertion of the electrical and/or electronic elements, the openings being configured to allow the passage of said electrical and/or electronic elements as mentioned above.

The heat treatment device can in particular be used for an electric and/or electronic element of the type of electric storage element, or battery cell, of an electric storage device, otherwise called a battery, of a vehicle.

According to one characteristic of the invention, the superposition of the longitudinal plates forms a plurality of fluid circulation channels, each of the fluid circulation channels extending between two plates longitudinal and being configured to ensure the passage of at least one fluid flowing from an orifice of a fluid distribution conduit to an orifice of another fluid distribution conduit. The longitudinal plates are fixed together at their respective periphery, via an edge forming a projection from the main face, so that the fixing of two adjacent plates generates a space formed between the heat exchange zone of two adjacent longitudinal plates. It is through this space that the fluid coming from the fluid distribution ducts circulates, from one orifice to another. Thus, the fluid, or each of the fluids, circulates initially within one of the fluid distribution ducts, then within a plurality of fluid circulation channels, until it leaves the treatment device heat by joining another fluid distribution duct allowing the fluid to exit.

According to one characteristic of the invention, the fluid circulation channels are configured to allow the passage of a first fluid and of a second fluid, at least one orifice of the first fluid distribution zone or of the second zone of fluid distribution being delimited by a perimeter projecting from the longitudinal plate and being configured to allow or obstruct the circulation of the first fluid or of the second fluid from the fluid distribution ducts to the fluid circulation channels so as to form a alternation between a fluid circulation channel configured to ensure the circulation of the first fluid and a fluid circulation channel configured to ensure the circulation of the second fluid in the vertical direction. The periphery of the orifices of the fluid distribution zones and the peripheral edge of the openings of the heat exchange zone of each of the longitudinal plates extend in vertical projection so as to come into contact with the adjacent longitudinal plate. The periphery of the orifices and the peripheral edge of the openings therefore make it possible to obstruct the circulation of fluid. Each opening of each longitudinal plate being provided with a peripheral edge, all of the openings of each of the plates are therefore sealed against the fluid which circulates in the fluid circulation channels. As mentioned, the fluid circulating in a fluid circulation channel therefore makes it possible to heat treat the electrical and/or electronic elements, via peripheral edges forming a heat exchange interface, these peripheral edges making it possible to prevent the fluid from coming into contact with the electrical elements and/or electronic.

Access for a fluid from a fluid distribution duct to a fluid circulation channel is itself authorized or not by the presence or absence of a perimeter around the orifices forming said fluid distribution duct. When the fluid circulates in a fluid distribution duct, the fluid passes through the various orifices of the superimposed longitudinal plates. When an orifice has no perimeter, the fluid can then flow from the fluid distribution conduit to the corresponding fluid circulation channel. When an orifice includes a perimeter, access to the corresponding fluid circulation channel is closed, and the fluid cannot therefore circulate therein and continues its circulation in the fluid distribution duct. The principle is identical when the fluid circulates from the fluid circulation channel to the fluid distribution ducts providing the outlet of the fluids.

It is also possible to implement a circulation of two distinct fluids within the heat treatment device, each fluid having its own path in the fluid distribution ducts and in the fluid circulation channels. Ensuring the circulation of two fluids makes it possible to implement two different functions within the heat treatment device, for example a first function of cooling the electrical and/or electronic elements via a first fluid, and a second function of heating the electrical elements and/or electronics via a second fluid. Within a heat treatment device according to the invention where the first fluid and the second fluid circulate, the fluid distribution ducts formed by the superposition of the longitudinal plates are arranged so that a fluid alternately passes through an orifice devoid of periphery and an orifice comprising a periphery. In other words, in the vertical direction, the succession of fluid circulation channels is alternated between a fluid circulation channel at the within which the first fluid circulates and a fluid circulation channel within which the second fluid circulates. Such an alternation makes it possible to homogenize the heat treatment exerted by the first fluid and the heat treatment exerted by the second fluid, said fluids flowing at equal flow rate along the vertical direction of the heat treatment device.

According to one characteristic of the invention, the heat treatment device comprises at least one plate arranged at a vertical end of the superposition of the longitudinal plates and forming a stop for the insertion of the electrical and/or electronic elements. Such a plate makes it possible to close the receiving cavities formed by the openings as well as the distribution ducts formed by the orifices. The so-called solid plate in that it has no openings similar to those that a longitudinal plate has, thus makes it possible both to form a stop for the insertion of the electrical and/or electronic elements and to close the ducts of fluid distribution so that fluids do not flow out of the heat treatment device.

According to a feature of the invention, each peripheral edge of each longitudinal plate comprises at least one return edge projecting into each of the receiving cavities. Each return edge extends the peripheral edge of the openings and extends towards the center of said openings, circumferentially within each receiving cavity. The return edges correspond to extensions of each longitudinal plate extending as far as an internal volume of each receiving cavity. These return edges can, for example, participate in guiding the insertion of electrical and/or electronic elements within the receiving cavities.

The invention also covers a heat treatment system comprising a first fluid circuit configured to circulate a first fluid, a second fluid circuit configured to circulate a second fluid and a heat treatment device as described above, the first circuit of fluid comprising a module of cooling configured to lower the temperature of the first fluid, the second fluid circuit comprising a heating module configured to increase the temperature of the second fluid. The heat treatment system thus makes it possible to put the first fluid and the second fluid into circulation so that the latter can circulate within the heat treatment device, more particularly within the fluid distribution ducts and the fluid circulation channels, to heat treat electrical and/or electronic components.

Within the heat treatment system, the first fluid has the function of lowering the temperature of the electrical and/or electronic elements, while the second fluid has the function of increasing the temperature of the electrical and/or electronic elements. It has in fact been demonstrated that the temperature of the electrical and/or electronic elements has an influence on their operation. By way of example, and in particular when these electrical and/or electronic elements consist of electrical storage elements, if the temperature of the electrical storage elements is too high following their release of heat during their operation, the electrical storage elements can become damaged. Conversely, if the temperature of the electrical storage elements is too low, for example when starting up the electrical or electronic device, or in the event of low ambient temperature, the power transmitted by the electrical storage elements drops. is reduced, which affects the autonomy of the electrical or electronic device. The heat treatment system according to the invention therefore guarantees the maintenance of the electrical and/or electronic elements at a temperature between a minimum threshold temperature and a maximum threshold temperature, which optimizes the operation of the electrical and/or electronic elements.

The first fluid is cooled by the cooling module, which is integrated into the first fluid circuit, before being sent within the heat treatment device in order to cool the electrical and/or electronic elements. The first fluid thus leaves the heat treatment device at a higher temperature than at the inlet. The first fluid is then cooled again by the cooling module before recirculate in the heat treatment device. The cooling module can for example be a heat exchanger.

The first fluid may in particular consist of coolant, for example glycol water, or refrigerant fluid, for example 1234YF or 134A.

The principle is identical for the second fluid and for the second fluid circuit. The heating module makes it possible to increase the temperature of the second fluid before the latter circulates in the heat treatment device in order to increase the temperature of the electrical and/or electronic elements. The second fluid thus exits at a lower temperature than at the inlet and is again heated by the heating module, which can also be a heat exchanger for example. The second fluid may in particular consist of coolant, for example glycol water, or oil for example. According to a characteristic of the invention, the first fluid circuit and the second fluid circuit are each connected to two fluid distribution ducts of the heat treatment device. The two fluid distribution ducts connected to each of the fluid circuits allow the entry and exit of the first fluid and of the second fluid, in order to form a loop making it possible to heat treat the heat treatment device.

The invention also covers an electronic system comprising a plurality of electrical storage elements and at least one heat treatment device as described previously. By way of non-limiting example, the electronic system may consist of a battery pack of an electrical or electronic device, such as an electric motor of a motor vehicle.

According to one characteristic of the invention, the electrical and/or electronic elements are arranged in the receiving cavities of the heat treatment device, the battery pack comprising a thermally conductive material arranged in each receiving cavity including an electrical and/or electronic. The presence of the edges of reference protruding within the receiving cavities generates a vacuum between the electrical and/or electronic elements and the peripheral edges delimiting the receiving cavities. The thermally conductive material therefore makes it possible to fill this void after having installed the electrical and/or electronic element. The thermally conductive material makes it possible to transmit the thermal effect of the fluids circulating near the reception cavities to the electrical and/or electronic elements. Having the thermally conductive material thus allows a better efficiency of the heat treatment of the electric and/or electronic elements. By way of example, the thermally conductive material can be silicone.

Other characteristics and advantages of the invention will become apparent through the description which follows on the one hand, and several embodiments given by way of indication and not limiting with reference to the appended diagrammatic drawings on the other hand, on which :

[fig 1] is a schematic representation of a vehicle comprising an electronic system, here a battery pack, according to the invention,

[fig 2] is a general view of a heat treatment device according to the invention,

[fig 3] is a schematic sectional representation of the heat treatment device according to the invention,

[fig 4] is a sectional view of a longitudinal plate making up the heat treatment device according to the invention,

[fig 5] is a sectional view of the heat treatment device showing a superposition of longitudinal plates in accordance with figure 4 and receiving cavities, here four in number, formed by an alignment of openings made in the longitudinal plates ,

[fig 6] is a sectional view of an electrical and/or electronic element arranged within one of the reception cavities formed by the superposition of longitudinal plates,

[fig 7] is a representation of a first embodiment of a sealing means for the receiving cavity, [fig 8] is a representation of a second embodiment of the means for sealing the receiving cavity,

[fig 9] is a representation of a third embodiment of the means for sealing the receiving cavity,

[fig 10] is a representation of a fourth embodiment of the sealing means of the receiving cavity.

In what follows, a heat treatment device will be more particularly described for an electronic system in the form of a motor vehicle battery pack, with electrical and/or electronic elements in the form of electrical storage elements. But it should be noted that the following description can be understood with electronic systems of another kind, such as computer servers for example.

FIG. 1 schematically represents an electric or electronic device 1 provided with a battery pack 2. The electric or electronic device 1 can for example be an electric or hybrid vehicle, as represented in FIG. 1, the propulsion of which is at the least partially carried out via electrical energy.

As such, the battery pack 2 comprises a plurality of electrical storage elements 4. The electrical storage elements 4 are capable of storing electrical energy when the electrical or electronic device 1 is being charged, for example via an electrical connection. Subsequently, when the electrical or electronic device is in operation, the electrical storage elements 4 are capable of using the stored electrical energy to, for example, transmit it to an electric motor, not shown.

During their operation, the electrical storage elements 4 are liable to release heat and thus to rise in temperature. Too high a temperature is likely to damage the electrical storage elements 4. Furthermore, too low a temperature of the electrical storage elements 4, for example when starting the electrical or electronic device 1 or in the event of low ambient temperature , is capable of causing malfunctions, for example a reduction in the electrical power transmitted, and/or a reduction in the autonomy of the electrical or electronic device 1.

To overcome these malfunctions, the battery pack 2 comprises a heat treatment system 3, guaranteeing the heat treatment of the electrical storage elements 4 so that they are maintained within a temperature range and thus operate optimally. . The heat treatment system 3 notably comprises a heat treatment device 5, within which the electrical storage elements 4 are arranged, and at least one fluid circuit. In Figure 1, the heat treatment system 3 comprises a first fluid circuit 6 and a second fluid circuit 7.

The first fluid circuit 6 and the second fluid circuit 7 are both configured to authorize the circulation of a fluid making it possible to thermally treat the electrical storage elements 4. The first fluid circuit 6 can for example authorize the circulation of a refrigerant fluid while the second fluid circuit 7 can allow the circulation of a heating fluid. Each of the fluid circuits 6, 7 is connected to at least two connection endpieces 27, each being itself connected to a fluid distribution conduit 10 arranged within the heat treatment device 5. Thus, the refrigerant fluid or the heating fluid is capable of circulating within the heat treatment device 5 in order to heat treat the electrical storage elements 4. The structural details of the heat treatment device 5 will be described subsequently. Each of the fluid circuits 6, 7 is connected to two fluid distribution conduits 10 so that each corresponding fluid can enter within the heat treatment device 5 and exit therefrom. In FIG. 1, each of the fluid circuits 6, 7 is connected to two adjacent fluid distribution ducts 10, but they can also be connected to a fluid distribution duct 10 arranged at a first longitudinal end of the device. heat treatment device 5 and to another fluid distribution conduit 10 arranged at a second longitudinal end of the heat treatment device 5. The first fluid circuit 6 and the second fluid circuit 7 respectively comprise a first pump 61 and a second pump 71, each of which is configured to put the corresponding fluid into circulation. The first fluid circuit 6 comprises a cooling module 62 making it possible to cool the refrigerant fluid. In FIG. 1, the cooling module 62 is presented in the form of a heat exchanger, but any means making it possible to lower the temperature of the refrigerant fluid can be envisaged. The second fluid circuit 7 for its part comprises a heating module 72 ensuring the heating of the heating fluid. Just as for the cooling module 62, the heating module 72 is presented in the form of a heat exchanger but any means making it possible to increase the temperature of the heating fluid is possible.

The pumps 61, 71, the cooling module 62 and the heating module 72 can be controlled by a control module, not shown, which, depending on a measured temperature of the electrical storage elements 4, is able to put operation of the first fluid circuit 6 or the second fluid circuit 7 depending on the need, with the aim of thermally treating the electrical or electronic elements.

Figure 2 is a detailed representation of the heat treatment device 5 shown in Figure 1. It is thus possible to observe that the heat treatment device 5 is formed of a succession of longitudinal plates 8 superimposed on each other according to a vertical direction 14 parallel to a plane of extension of each of the longitudinal plates 8. Once the superimposition of the longitudinal plates 8 has been carried out, these can be fixed together, for example by brazing.

The heat treatment device 5, and each of the longitudinal plates 8 which participate in forming it, are divided into a first fluid distribution zone 11, into a second fluid distribution zone 12 and into a heat exchange zone 13. The first fluid distribution zone 11 and the second fluid distribution zone 12 are arranged opposite one another on each of the longitudinal ends of each longitudinal plate 8. The exchange zone 13 is itself arranged in the center of each longitudinal plate 8 and is framed longitudinally on either side by the first fluid distribution zone 11 and by the second fluid distribution zone 12. This is at the level of the first fluid distribution zone 11 and the second fluid distribution zone 12 that are arranged the connection endpieces 27 and the fluid distribution ducts 10 previously mentioned which allow the circulation of fluid between the fluid circuits illustrated in figure 1 and the heat treatment device 5. At the level of the heat exchange zone 13, and as can be seen in FIG. 2 for the longitudinal plate arranged at the top of the stack of plates forming the heat treatment device, each longitudinal plate 8 comprises a plurality of through openings 16, that is to say made in the thickness of the longitudinal plates 8 perpendicular to the alloplane main location of these longitudinal plates. In FIG. 2, the openings 16 are circular, but any shape is possible, the main thing being that the openings 16 can allow passage of the electrical storage elements 4 when these are arranged within the heat treatment device 5. Each of the openings 16 of each longitudinal plate 8 is arranged so that an opening 16 of a first longitudinal plate 8 and an opening 16 of a second longitudinal plate 8 face each other, or in other words aligned vertically, when said two longitudinal plates 8 are superimposed on each other. Thus, when the plurality of longitudinal plates 8 is superimposed in the vertical direction 14, the superposed openings 16 of each of the longitudinal plates 8 form receiving cavities 15 within the heat treatment device 5 sized to each house an electrical storage element 4. One of these receiving cavities 15 is shown in dotted lines in Figure 2.

The heat treatment device 5 is configured to receive and heat treat as many electrical storage elements 4 as cavities of reception 15 are formed by the superposition of the longitudinal plates 8. In order to maximize the number of electrical storage elements 4 which can be heat treated but without disturbing the efficiency of the heat treatment, that is to say leaving a sufficient space between two neighboring electrical storage elements, the receiving cavities 15 can for example be arranged in staggered rows as shown in Figure 2.

The heat treatment device 5 comprises a first vertical end face, visible in FIG. 2, onto which the plurality of receiving cavities open, to allow the insertion of the electrical storage elements, and a second vertical end face formed by a solid plate 9 intended to come to the end of the stack of longitudinal plates 8. The solid plate 9 is superposed on the longitudinal plates 8 and closes the heat treatment device 5 at one of the vertical ends, in order on the one hand to make a vertical stop at the insertion of the electrical storage elements 4 and on the other hand to avoid any leakage of fluid intended to circulate between the longitudinal plates for thermally treating these electrical storage elements. The solid plate 9 is said to be solid in that, in the heat exchange zone 13, it has no openings similar to the openings 16 of the longitudinal plates 8 and in that it also has no orifice in the zones of fluid distribution, so that it makes it possible to close the fluid distribution ducts 10.

The solid plate 9 can be provided with holes, of dimensions smaller than those of the openings 16 formed in the longitudinal plates, in the zones located vertically to the cavities for receiving the electrical storage elements, in order to allow the injection of a thermally conductive material after the installation of the electrical storage elements, as will be detailed below. The solid plate 9 then serves as a stop for the insertion of the electrical storage elements, but also as an entry point for the injection of this material.

FIG. 3 is a diagrammatic sectional representation of the heat treatment device 5 making it possible to illustrate the superposition of the longitudinal plates 8. When the latter are superimposed on each other others, a fluid circulation channel 21 is formed between the surface of two longitudinal plates 8 adjacent. Thus, a plurality of fluid circulation channels 21 is formed when the longitudinal plates 8 are superimposed, the fluid circulation channels being arranged one above the other along the vertical dimension of the heat treatment device. It is within these fluid circulation channels 21 that the fluid or fluids circulate, here the first fluid and the second fluid, guaranteeing the heat treatment of the electrical storage elements 4, these being arranged within the cavities of reception 15.

The fluid circulation channels 21 are traversed by the cooling fluid or by the heating fluid. Fluid circulation takes place from the fluid distribution ducts to the fluid circulation channels 21 for fluid inlet within the heat treatment device 5, and from the fluid circulation channels 21 to the fluid distribution ducts for a fluid outlet from the heat treatment device 5. Advantageously, the heat treatment device 5 is arranged to form an alternation between a fluid circulation channel 21 through which the refrigerant fluid passes and a fluid circulation channel 21 traversed by the heating fluid, such an alternation being observed in the vertical direction. The alternation of fluid circulation channels 21 makes it possible to homogenize the cooling or heating of the electrical storage elements 4 over their entire vertical dimension. The heat treatment of the electrical storage elements 4 is then improved.

Figure 4 is a sectional view of one of the longitudinal plates 8 for forming the heat treatment device shown in the previous figures. It is thus possible to see that the openings 16 are delimited by a peripheral edge 18. The peripheral edge 18 is formed by deformation of the longitudinal plate 8, so as to form a projection from the main elongation plane of the longitudinal plate 8. The peripheral edge 18 is sized vertically projecting so that the free end of this peripheral edge is in contact with the adjacent longitudinal plate 8 when the longitudinal plates 8 are superimposed. The peripheral edge 18 therefore contributes to the sealing of the receiving cavities relative to the fluid circulation channels once the heat treatment device has been formed. The fluids circulating within the latter can therefore only circumvent the openings 16, the peripheral edges 18 obstructing the circulation of the fluids. A free end of the peripheral edges 18 is bent to form a return edge 22 substantially parallel to the elongation plane of the longitudinal plate. It is also possible to observe that each longitudinal plate 8 comprises orifices 17 located at the level of the first fluid distribution zone 11 and of the second fluid distribution zone 12. It is these orifices 17 which constitute the distribution ducts of fluid once the longitudinal plates 8 are superposed together.

The orifices 17 are delimited by a perimeter 20 formed by a projection of the longitudinal plate and extending circumferentially around the orifice 17. In FIG. 4, the orifice 17 represented on the first fluid distribution zone 11 is provided with a rim 20, whereas the orifice 17 represented on the second fluid distribution zone 12 does not include one. The periphery 20 ensures that it obstructs the circulation of fluid between the distribution duct and the fluid circulation channel formed between two longitudinal plates 8. The fluid circulating in the fluid distribution duct is therefore guided vertically at the level of the orifice of the adjacent longitudinal plate, which itself may not be delimited by a perimeter 20 in order to allow the circulation of fluid within the corresponding fluid circulation channel.

Finally, each longitudinal plate 8 comprises a contour 19 which extends all around each longitudinal plate 8. The contour 19 interacts in particular with an adjacent longitudinal plate 8 when the longitudinal plates 8 are superimposed. in position of the longitudinal plates 8 relative to each other so that the orifices 17 and the openings 16 are correctly facing relative to each other. The contour 19 also makes it possible to ensure contact between the longitudinal plates 8 adjacent to each other, so that the fixing of the longitudinal plates 8 to each other ensures the tightness of the heat treatment device. In the example shown on Figure 4, the contour 19 extends the longitudinal plate 8 in a direction opposite to that of the peripheral edges 18 and the edges 20.

Figure 5 is a sectional view of the heat treatment device 5, and allowing to observe in detail the interactions arising from the superposition of the longitudinal plates 8.

At the longitudinal ends of the longitudinal plates 8, each contour 19 is in direct contact with one another. The contours 19 of all the longitudinal plates 8 are then fixed together, for example by brazing, in order to prevent any leakage of fluid from the heat treatment device 5.

The same goes for the peripheral edges 18 arranged around each of the openings of the longitudinal plates 8. These are in contact with each other and are fixed to each other, thus forming a sealed barrier obstructing the flow of fluids within the receiving cavities 15 intended to receive the electrical storage elements.

The periphery 20 of the orifices of the longitudinal plates 8 are arranged so as to obstruct the circulation of fluid between the fluid distribution duct 10 formed by said orifices and part of the fluid circulation channels 21 formed between the plates longitudinal 8. Thus, each of the fluid distribution ducts 10 is formed by alternating an orifice comprising a perimeter 20 and an orifice devoid of a perimeter 20, and this in order to cause an alternation between a circulation channel of fluid 21 traversed by the cooling fluid and a fluid circulation channel 21 traversed by the heating fluid as described in Figure 3.

The heat treatment device, once the longitudinal plates 8 are superimposed on each other, is configured so that the return edge 22 formed at the free end of each peripheral edge 18 forms a protrusion within the receiving cavity. 15 corresponding, extending circumferentially across it. The return edges 22 can participate in maintaining the electrical storage elements in position within the receiving cavities 15. Figures 6 and 7 show an electrical storage element 4 inserted into a receiving cavity. The electrical storage element 4 is therefore in contact or substantially in contact with the return edges 22 of the longitudinal plates. This results in an empty space between the peripheral edges delimiting a reception cavity 15 and the electrical storage element 4 housed in this reception cavity. In this context, once the electrical storage element 4 has been put in place, the receiving cavity is filled with a thermally conductive material 23, as shown in FIG. 7, so as to fill the empty space. The thermally conductive material 23 can for example be silicone and it makes it possible to ensure, by filling the void, a good heat exchange performance between the electrical storage element and the fluid circulating at this moment in the circulation channels.

The thermally conductive material 23 can also participate in the sealing of the reception cavity. The filling of the receiving cavity with the thermally conductive material 23, after the electrical storage element 4 has been placed therein, constitutes a first embodiment of a sealing means for the receiving cavity.

FIG. 8 schematically represents a second embodiment of the means for sealing the receiving cavity. The second embodiment is suitable for straight longitudinal plates 8 . Each of the fluid circulation channels 21 is therefore also rectilinear and is closed at the level of the receiving cavities by O-rings 24. The latter thus prevent the flow of fluids within the receiving cavities and any contact with the elements of electrical storage 4 housed in these receiving cavities. The O-rings 24 are however thermally conductive so that the fluids can thermally treat the electrical storage elements 4. The O-rings 24 are placed on a longitudinal plate 8 around each of the openings 16 of this plate and they are compressed by the superposition of an adjacent plate before fixing the plates together, for example by gluing, the compression ensuring the deployment of the O-rings between two adjacent plates necessary for the desired sealing function. he can be provided on each longitudinal plate of the centering means arranged around the openings 16 to ensure that the O-ring is correctly placed around the corresponding openings.

FIG. 9 schematically represents a third embodiment of the means for sealing the receiving cavity. For this third embodiment, the electrical storage element 4 is slipped into a protective sheath 25. The protective sheath 25 containing the electrical storage element 4 is then inserted into the receiving cavity. The protective sheath 25, because of its flexibility and its size, then closes the fluid circulation channels 21. More particularly, the external diameter of this sheath is greater than the diameter of the openings, and the sheath tends to deform during the insertion of the assembly and therefore to deploy between the adjacent plates as shown schematically. The protective sheath 25 is thermally conductive so that the fluids can thermally treat the electrical storage elements 4.

Figure 10 is a representation of a fourth embodiment of the sealing means. In this fourth embodiment, the longitudinal plates differ from what could be described previously in that, unlike the peripheral edges delimiting the openings in the first embodiment, the terminations 26 participating in delimiting the openings are different from one plate to another, when considering two successive plates of the stack. Each longitudinal plate 8 comprises terminations 26 which come into contact with the electrical storage element 4, and also close the fluid circulation channels 21. A space formed between the terminations 26 and the electrical storage element 4 may possibly be filled with the thermally conductive material 23 previously mentioned in the first embodiment of the invention.

Of course, the invention is not limited to the examples which have just been described and many adjustments can be made to these examples without departing from the scope of the invention. The invention, as it has just been described, achieves the goal it had set itself, and makes it possible to propose a longitudinal plate and a heat treatment device resulting from a superposition of longitudinal plates forming cavities reception for electrical storage elements. Variants not described here could be implemented without departing from the context of the invention, provided that, in accordance with the invention, they comprise a longitudinal plate and/or a heat treatment device in accordance with the invention.

Claims

1- longitudinal plate (8) for a heat treatment device (5), comprising a first fluid distribution zone (11) arranged at a first longitudinal end of the longitudinal plate (8) and a second fluid distribution zone fluid (12) arranged at the level of a second longitudinal end of the longitudinal plate (8), each fluid distribution zone (11, 12) comprising at least one orifice (17), the said longitudinal plate (8) comprising a zone heat exchange zone (13) extending between the first fluid distribution zone (11) and the second fluid distribution zone (12), the heat exchange zone (13) being configured to allow the circulation of the fluid between two orifices (17), characterized in that the heat exchange zone (13) comprises a plurality of openings (16), each opening (16) being configured to allow passage of an electrical and/or electronic element (4) through said openings (16) , each opening (16) being delimited by a peripheral edge (18) projecting from the longitudinal plate (8) and forming an obstacle to the circulation of fluid.

2- longitudinal plate (8) according to claim 1, comprising a contour (19) extending around the periphery of the longitudinal plate (8) and configured to interact by direct contact with an adjacent longitudinal plate (8).

3- heat treatment device (5) comprising a plurality of longitudinal plates (8) according to any one of the preceding claims, said longitudinal plates (8) being superimposed on each other in a vertical direction (14) perpendicular to a plane of elongation of the longitudinal plates (8), the orifices (17) of the first fluid distribution zone (11) and of the second fluid distribution zone (12) of each longitudinal plate (8) being at one above the others in the vertical direction (14) so as to form a fluid distribution duct (10) extending mainly in the vertical direction (14) perpendicular to the plane of elongation of the longitudinal plates (8), the openings (16) of the heat exchange zone (13) of each longitudinal plate (8) being one above the other so as to form a receiving cavity (15) extending mainly in the vertical direction (14) perpendicular to the plane lengthening of the longitudinal plates (8) and configured to receive an electrical and/or electronic element (4).

4- Heat treatment device (5) according to the preceding claim, wherein the superposition of the longitudinal plates (8) forms a plurality of fluid circulation channels (21), each of the fluid circulation channels (21) extending between two longitudinal plates (8) and being configured to ensure the passage of at least one fluid circulating from an orifice (17) of a fluid distribution duct (10) to an orifice (17) of another duct fluid distribution (10).

5- Heat treatment device (5) according to the preceding claim, wherein the fluid circulation channels (21) are configured to allow the passage of a first fluid and a second fluid, at least one orifice (17) of the first fluid distribution zone (11) or of the second fluid distribution zone (12) being delimited by a perimeter (20) projecting from the longitudinal plate (8) and being configured to allow or obstruct the circulation of the first fluid or of the second fluid from the fluid distribution ducts (10) towards the fluid circulation channels (21) so as to form an alternation between a fluid circulation channel (21) configured to ensure the circulation of the first fluid and a fluid circulation channel (21) configured to ensure the circulation of the second fluid in the vertical direction

(14).

6- heat treatment device (5) according to one of claims 3 to 5, comprising at least one plate (9) disposed at a vertical end of the superposition of the longitudinal plates (8) and forming a stop at the insertion of the elements electrical and/or electronic (4). 7- heat treatment device (5) according to any one of claims 3 to 6, wherein each peripheral edge (18) of each longitudinal plate (8) comprises at least one return edge (22) projecting into each of the receiving cavities (15).

8- Heat treatment system (3) comprising a first fluid circuit (6) configured to circulate a first fluid, a second fluid circuit (7) configured to circulate a second fluid and a heat treatment device (5) according to any one of claims 3 to 7, the first fluid circuit (6) comprising a cooling module (62) configured to lower the temperature of the first fluid, the second fluid circuit (7) comprising a heating module ( 72) configured to increase the temperature of the second fluid, the first fluid circuit (6) and the second fluid circuit (7) each being connected to two fluid distribution conduits (10) of the heat treatment device (5).

9- electronic system (2), comprising at least one heat treatment device (3) according to one of claims 3 to 7 and at least one electrical and / or electronic element (4) housed in a cavity (15) of the device heat treatment (3).

10- electronic system (2) according to the preceding claim, wherein the electrical and / or electronic elements (4) are arranged in the receiving cavities (15) of the heat treatment device (3), the battery pack (2) comprising a thermally conductive material (23) disposed in each receiving cavity (15) including an electric and/or electronic element (4).