HEAT EXCHANGER DEVICE AND METHOD FOR CONNECTING THE DEVICE

Abstract

The invention relates to a heat exchange device, comprising: - a main member (10) provided with a planar assembly face, comprising aluminium, and forming a fluid circulation channel leading into a port arranged on the assembly face; - a connection end piece comprising a connection base, the connection base comprising a connection face through which a connection channel opens, the connection base being assembled with the main member (10) by means of an adhesive substance linking an assembly zone of the assembly face that is peripheral to the port to a connection zone of the connection face that is peripheral to the port, the opening and the port being in correspondence with each other, the adhesive substance comprising an adhesive that is either epoxy or polyurethane or acrylic or hybrid, the hybrid adhesive comprising at least two chemical functions chosen from one of epoxy, cyanoacrylate, acrylic and polyurethane.

Description

Heat exchange device and method of connecting said device FIELD OF THE INVENTION

[0001] The invention relates to the field of heat exchange devices, and in particular heat exchange devices capable of being implemented in the automotive field. More particularly, the present invention relates to a heat exchange device and a method for connecting a heat exchange plate. TECHNOLOGICAL BACKGROUND OF THE INVENTION

[0002] Battery packs in motor vehicles are generally composed of elementary cells attached to a chassis and coupled to heat exchange means configured to regulate the temperature (heat or cool) of the elementary cells when they are in operation.

[0003] These heat exchange means may in particular comprise heat exchange plates providing a fluid circulation channel in which a heat transfer fluid is likely to circulate.

[0004] The heat exchange means are also connected to an external fluid circuit. More specifically, this connection uses connection tips. These are generally crimped, welded, or brazed onto the surface of the heat exchange plates.

[0005] In this regard, documents WO2020 / 254757 A1, WO2020 / 031221 A1 and FR2832790 A1 disclose a method for connecting a heat exchanger to an external heat exchange circuit by means of a connection end piece. This connection means, in addition to its specific configuration, can be welded or glued to a plate of the heat exchanger.

[0006] However, the solutions proposed in the aforementioned documents are not satisfactory. Indeed, the methods considered for fixing a connection end piece to a heat exchanger remain complicated to implement without necessarily fully meeting the requirements of temperature resistance, sealing or even mechanical resistance.

[0007] An aim of the present invention is therefore to propose a heat exchange device provided with a connection end piece whose fixing complies with the requirements in terms of temperature resistance, sealing or even mechanical resistance.

[0008] Another aim of the present invention is also to propose a method for fluidic connection of a conduit, by means of a connection end piece, simple to implement and conforming to the requirements in terms of temperature resistance, sealing or even mechanical resistance. BRIEF DESCRIPTION OF THE INVENTION

[0009] The aims of the present invention are, at least in part, achieved by a heat exchange device which comprises:

[0010] - a main member provided with an essentially flat assembly face, comprising aluminum, and providing a fluid circulation channel opening through an orifice arranged on the assembly face of said main member;

[0011] - a connecting end piece comprising a flat connecting base, the connecting base comprising a face, called the connecting face, through which an opening of a connecting channel opens, the connecting base being assembled with the main member, by means of an adhesive substance bonding an assembly zone of the assembly face, peripheral to the orifice, with a connection zone of the connecting face and peripheral to the opening, the opening and the orifice being in correspondence with each other, the adhesive substance comprising either an epoxy glue or a polyurethane glue or an acrylic glue or a hybrid glue, the hybrid glue comprising at least two chemical functions chosen from the epoxy function, the cyanoacrylate function, the acrylic function, the polyurethane function.

[0012] According to one method of implementation, the adhesive substance mechanically, advantageously chemically, and in a sealed manner, binds the assembly zone with the connection zone.

[0013] According to one embodiment, the end piece comprises an internal wedge, advantageously of annular or oblong shape, projecting relative to the connection zone and circumscribed by said connection zone, the internal wedge being configured to define a volume, called adhesion volume, between the connection zone and the assembly zone and in which the adhesive substance is housed.

[0014] According to one embodiment, the tip also comprises a peripheral wedge projecting relative to the connection zone and which circumscribes the connection zone so as to delimit, with the internal wedge, the adhesion volume.

[0015] According to one embodiment, a seal, advantageously an O-ring or a lip seal, is arranged in a groove, formed on the connection face, and inserted between the opening and the internal shim, said internal shim being inserted between the adhesive substance and the groove, advantageously the seal is in a compressed state in a range of 10% to 35% relative to its volume in the free state.

[0016] According to one embodiment, the ratio between the surface area of ​​the connection zone and the surface area of ​​the orifice is adjusted so that the assembly of the connection face with the assembly zone has a tensile strength greater than 1 MPa, advantageously greater than 1.6 MPa, even more advantageously greater than 4.3 MPa.

[0017] According to one embodiment, the ratio between the surface area of ​​the connection zone and the surface area of ​​the orifice is adjusted so that the assembly of the connection face with the assembly zone, at the end of step d), presents a seal during the circulation of a fluid at a pressure greater than 1 bar, advantageously greater than 3 bar, even more advantageously greater than 7 bar.

[0018] The invention also relates to a motor vehicle provided with a battery pack coupled to the heat exchange device according to the present invention, for the purpose of thermal regulation of the battery pack by said heat exchange device.

[0019] The invention also relates to a method for fluidic connection of a conduit, by means of a connection end piece, with a main member provided with an essentially planar assembly face, comprising aluminum, said main member being provided with a fluidic circulation channel opening through an orifice arranged on the assembly face, the connection end piece comprising a base, called a planar connection base, the connection base comprising a face, called a connection face, through which opens an opening of a channel, called a connection channel, of said connection end piece, the method comprising the execution of the following steps:

[0020] a) a first step of surface preparation of an assembly zone peripheral to the orifice, the first step comprising a laser treatment and / or an abrasion treatment and / or a chemical treatment, advantageously electrochemical;

[0021] b) a step of depositing an adhesive substance on one and / or the other of the assembly zone and a connection zone of the connection face and peripheral to the opening, the adhesive substance comprising either an epoxy glue or a polyurethane glue or an acrylic glue or a hybrid glue, the hybrid glue comprising at least two chemical functions among the epoxy function, the cyanoacrylate function, the acrylic function, the polyurethane function;

[0022] c) a step of assembling the assembly area and the connection face.

[0023] According to one embodiment, said method comprises a step d) of heat treatment intended to crosslink the adhesive substance.

[0024] According to one embodiment, step c) is preceded by a step c0) which comprises the positioning of a seal, in particular an O-ring or a lip seal, in a groove provided on the connection face, and inserted between the opening and the connection zone.

[0025] According to one embodiment, assembly step c) comprises the application of a force, called assembly force, adapted to keep the joint compressed in a range of 10% to 35% until a predetermined level of crosslinking of the adhesive substance is reached, the predetermined crosslinking being a crosslinking making it possible to maintain the compression of the joint at a compression level of between 10% and 35% as soon as the assembly force is no longer applied.

[0026] According to one embodiment, the ratio between the surface area of ​​the connection zone and the surface area of ​​the orifice is adjusted so that the assembly of the connection face with the assembly zone, at the end of step d), has a tensile strength greater than 1 MPa, advantageously greater than 1.6 MPa, even more advantageously greater than 4.3 MPa.

[0027] According to one embodiment, the ratio between the surface area of ​​the connection zone and the surface area of ​​the orifice is adjusted so that the assembly of the connection face with the assembly zone, at the end of step d), presents a seal during the circulation of a fluid at a pressure greater than 1 bar, advantageously greater than 3 bar, even more advantageously greater than 7 bar.

[0028] According to one embodiment, the first preparation step comprises the removal of a layer of native aluminum oxide likely to be present on the assembly zone, and the adjustment of the roughness of said assembly zone in a roughness range between 1.4 µm and 2.6 µm, advantageously greater than 1.9 µm, the first step implementing a LASER process or a mechanical abrasion process.

[0029] According to one embodiment, the first preparation step comprises the formation of an adhesion layer on the assembly zone, advantageously the adhesion layer is formed according to at least one of the following sub-steps:

[0030] - anodization or chemical conversion of the assembly area

[0031] - the formation of a Ti / Zr layer on the assembly area.

[0032] According to one embodiment, said method comprises a second step b0) surface preparation of the connection face and carried out before step b), the second step b0) comprises a plasma treatment and / or a chemical treatment and / or a laser treatment adapted to give the connection face a surface energy greater than 36 mN / m, advantageously greater than 50 mN / m.

[0033] Other characteristics and advantages of the invention will emerge from the detailed description which follows with reference to the appended figures in which:

[0034] This is a schematic representation of a heat exchange plate implemented within the framework of the connection method according to the present invention;

[0035] This is a schematic representation of a connection end piece capable of being implemented within the framework of the connection method according to the present invention, in particular, the connection end piece is represented according to a section plane passing through the axis XX';

[0036] This is a schematic diagram illustrating the formation of an adhesion layer, in particular on this, the heat exchange plate is represented according to a section plane perpendicular to the assembly face and passing through the orifice;

[0037] This is a schematic representation of the execution of step b) corresponding to the deposition of an adhesive substance on a connection zone of the connection end piece shown in the figure, in particular, the connection end piece is shown according to a section plane passing through the axis XX';

[0038] This is a schematic representation of the execution of step c) corresponding to the assembly of the connection zone with the adhesion zone, in particular the connection end piece and the heat exchange plate are represented according to a section plane passing through the axis XX';

[0039] This is a schematic representation relating to the execution of a step c0) on a connection end piece provided with a groove intended to house a seal, in particular the connection end piece is represented according to a section plane passing through the axis XX';

[0040] This is a schematic representation of the execution of step c) corresponding to the deposition of an adhesive substance on a connection zone of the connection end piece shown in the, in particular the connection end piece and the heat exchange plate are shown according to a section plane passing through the axis XX'. DETAILED DESCRIPTION OF THE INVENTION

[0041] The present invention relates to a heat exchange device. More particularly, the heat exchange device comprises a main member provided with an essentially flat assembly face, comprising aluminum, and providing a fluid circulation channel opening through an orifice arranged on the assembly face of said main member.

[0042] The heat exchange device also comprises a connection end piece comprising a flat connection base.

[0043] In particular, the connection base comprises a face, called the connection face, through which an opening of a connection channel opens.

[0044] The connection base is, in this respect, assembled with the main member, by means of an adhesive substance bonding an assembly zone of the assembly face, peripheral to the orifice, with a connection zone of the connection face and peripheral to the opening, the opening and the orifice being in correspondence with each other.

[0045] According to the present invention, the adhesive substance comprises either an epoxy glue or a polyurethane glue or an acrylic glue or a hybrid glue, the hybrid glue comprising at least two chemical functions chosen from the epoxy function, the cyanoacrylate function, the acrylic function, the polyurethane function.

[0046] The main member may comprise a heat exchange plate, a beam, or even a diffuser. The remainder of the description will be limited to the consideration of a heat exchange plate only. However, those skilled in the art may adapt the principles described below to other elements such as a beam or a diffuser.

[0047] The invention also relates to a method for fluidically connecting a conduit, by means of a connecting end piece, with a main member. The main member is in particular provided with an essentially flat assembly face, and comprises aluminum.

[0048] The main member is, moreover, provided with a fluid circulation channel opening through an orifice arranged on the assembly face. The connection end piece comprises a base, called the connection base, which is flat. The connection base comprises a face, called the connection face, through which an opening of a channel, called the connection channel, of said connection end piece opens.

[0049] The method, according to the present invention, comprises carrying out the following steps:

[0050] a) a first step of surface preparation of an assembly area peripheral to the orifice, the first step comprising a laser treatment and / or an abrasion treatment and / or a chemical treatment;

[0051] b) a step of depositing an adhesive substance on one and / or the other of the assembly zone and a connection zone of the connection face and peripheral to the opening, the adhesive substance comprising either an epoxy glue or a polyurethane glue or an acrylic glue or a hybrid glue, the hybrid glue comprising at least two chemical functions among the epoxy function, the cyanoacrylate function, the acrylic function, the polyurethane function;

[0052] c) a step of assembling the assembly area and the connection face.

[0053] In the figure, a partial representation of a heat exchange plate 10 can be seen. The heat exchange plate 10 comprises aluminum.

[0054] The heat exchange plate 10 is in particular a plate of a heat exchanger, and which defines a fluid circulation channel opening through an orifice 11 at the level of an assembly face 12 of the heat exchange plate 10.

[0055] In the figure, we can see a schematic representation of a connection end piece 20 intended to be fixed to the heat exchange plate.

[0056] In particular, the connecting end piece 20 comprises a main body 21 of generally cylindrical shape and terminated at one of its ends by a base, called the connecting base 22. The connecting end piece 20 comprises a channel, called the connecting channel 23, which extends in a direction defined by an axis of revolution XX' of the main body 21, and which opens out through an opening 24 arranged on a face, called the connecting face 25 of the connecting base 23.

[0057] The method according to the present invention comprises a first step a) of surface preparation of an assembly zone 13 peripheral to the orifice 11.

[0058] The extent and / or characteristics of the assembly zone 13 will be discussed in the remainder of the statement of the present invention.

[0059] According to the present invention, the first step a) of surface preparation can be carried out by means of laser treatment and / or abrasion treatment and / or chemical treatment and / or chemical conversion.

[0060] It is understood that a surface treatment makes it possible to decontaminate the assembly zone 13 to give it a particular surface energy and / or chemical state, and in particular compatible with the use of an adhesive substance which will be described in the remainder of the description of the present invention.

[0061] The native aluminum oxide layer remains uncontrollable. In particular, it may have limited adhesion and consequently form a zone of weakness. Thus, according to a particular implementation method, the first step a) may be carried out to remove a layer of native aluminum oxide likely to be present in the assembly zone. It is understood that the removal of the aluminum oxide layer during the execution of the first step is only effective in the assembly zone.

[0062] Particularly advantageously, the consideration of a LASER process makes it possible to grow, during the removal of the native aluminum oxide layer, a new aluminum oxide layer of controlled thickness and texture. In this regard, the LASER process may comprise illumination with LASER radiation of a wavelength l between 900 nm and 1550 nm, for example equal to 1064 nm, and of a fluence between 5 J / cm2 134 J / cm 2 , advantageously between 5 J / cm 2 and 15 J / cm 2 The LASER used can be a pulsed LASER or a continuous LASER.

[0063] Still according to this implementation method, the first step a) can be carried out to adjust the roughness of the assembly zone in a range of roughnesses Ra between 1.4 µm and 2.6 µm, advantageously greater than 1.9 µm. This roughness is advantageously measured by means of a tip roughness meter, for example Marsurf PS10 roughness meter with PHT 6-350 probe and equipped with a 2 µm tip. The measurement parameters are as follows:Measuring speed: 1.0 mm / sMeasuring length: 10 mmMeasuring force: 0.75 mNStandard followed: DIN EN ISO 4287

[0064] According to another embodiment illustrated in, the first preparation step a) may also comprise the formation of an adhesion layer 14 on the assembly zone. It is understood that the formation of the adhesion layer may be limited to the assembly zone 11 alone.

[0065] According to a first alternative, the adhesion layer 14 is formed by performing an anodization, for example selective, of the assembly zone. According to another alternative, the adhesion layer may comprise the formation of a Ti / Zr layer on the assembly zone 11. Still as an alternative, the chemical treatment may comprise a chemical conversion treatment.

[0066] The connection method according to the present invention also comprises a step b) of depositing an adhesive substance on one and / or the other of the assembly zone 13 and a connection zone 26 of the connection face 25 and peripheral to the opening 24.

[0067] The adhesive substance comprises either an epoxy glue or a polyurethane glue or an acrylic glue or a hybrid glue, the hybrid glue comprising at least two chemical functions among the epoxy function, the cyanoacrylate function, the acrylic function, the polyurethane function.

[0068] Illustrates, in this regard, the deposition of the adhesive substance 27 on the connection zone 26.

[0069] In a particularly advantageous manner, the connection zone 26 can be delimited internally by an internal wedge 28. In particular, the internal wedge 28 projects relative to the connection zone 27 and is circumscribed by said connection zone. For example, the internal wedge is annular or oblong in shape.

[0070] Still advantageously, the connection zone 26 can also be delimited externally by a peripheral wedge 29 projecting relative to the connection zone 26 and which circumscribes the connection zone 26.

[0071] This is a schematic representation of a step c) of assembling the assembly area and the connection area.

[0072] During this assembly step c), the opening 24 and the orifice 11 are in correspondence with each other, and the adhesive substance 27 spreads so as to fill a space provided between the assembly zone 13 and the connection zone 26. The use of the adhesive substance 28 thus makes it possible to mechanically, advantageously chemically, and in a sealed manner, bond the assembly zone 13 with the connection zone 26.

[0073] By "watertight" we mean watertight to a coolant, and in particular to a liquid likely to contain glycol.

[0074] In this respect, the implementation of the internal shim 28 and the peripheral shim 29 also makes it possible to define a volume, called the adhesion volume 30 (), between the connection zone 26 and the assembly zone 13 and in which the adhesive substance 27 is intended to be housed. In other words, the internal shim 28 and the peripheral shim 29 make it possible to limit the volume in which the adhesive substance can spread during the execution of one and the other of steps b) and c). In particular, the internal shim 28 and the peripheral shim 29 limit the overflows of adhesive substance 27 likely to occur during the execution of step c).

[0075] Furthermore, the internal shim 28 makes it possible to isolate the opening from the adhesion volume and, consequently, from the adhesive substance 27.

[0076] Furthermore, it is understood that the internal shim 28 and the peripheral shim 29 are in abutment against the assembly face 12 at the end of step c).

[0077] According to a particularly advantageous embodiment, it is possible to consider only the internal wedge 28 (device without peripheral wedge 29). This latter configuration thus provides a flow path (and / or creep) for the adhesive substance other than towards the opening 24.

[0078] According to another particularly advantageous embodiment, it is possible to consider a discontinuous peripheral wedge 29 (open, for example in the form of a crenel) so as to thus provide a flow path (and / or creep) for the adhesive substance other than towards the opening 24.

[0079] According to a particularly advantageous embodiment, the adhesive substance may comprise balls, for example glass balls, the dimensions of which (it is understood that these are average dimensions) are adapted to impose a predetermined distance between the connection zone 26 and the assembly zone 13. It is understood that if the balls considered were to be spherical, the dimensions would be equal to the diameter of said balls. This particular embodiment may be considered alone or in combination with one and / or the other of the internal wedge and the peripheral wedge.

[0080] Furthermore, the connecting end piece 20 may comprise, in the extension of the main body 21 and in projection relative to the connecting face 25, means for guiding said connecting end piece 20. More particularly, the guiding means are configured to allow the opening 24 and the orifice 11 to be brought into correspondence. The guiding means may comprise a wedge, called a guiding wedge 31, peripheral to the opening and intended to be inserted into the orifice 11. In this respect, the guiding wedge 31 may have a shape conforming to the orifice 11 and / or frustoconical.

[0081] Optionally, it is also possible to consider carrying out, after step c), a heat treatment step d) intended to accelerate the crosslinking of the adhesive substance. The details relating to step d), and in particular the thermal cycle considered, depend on the adhesive substance considered.

[0082] The heat treatment considered for the execution of step d) may comprise a localized heating step. In particular, the heat treatment may comprise induction heating, and more particularly induction heating of the heat exchange plate 10 made, for example, of aluminum. In this respect, induction heating makes it possible to accelerate the crosslinking process of the adhesive substance. In particular, induction heating may be adapted to sufficiently accelerate crosslinking over a period of less than 2 minutes, advantageously less than 1 min 30 seconds. For example, a crosslinking cycle may comprise a heating time followed by a cooling time. In particular, the heating time may be less than 1 min 30 seconds, advantageously less than 1 min. This latter aspect makes it possible to envisage online monitoring of the tightness of the assembly, for example tightness at a pressure of 3 bar.

[0083] Alternatively or additionally, both the connecting end piece 20 and the heat exchange plate 10 may be preheated before performing step c). This latter aspect makes it possible in particular to compensate for any differences in thermal expansion that may occur during the performance of step d). This preheating also makes it possible to maintain the precision of alignment between the connecting end piece 20 and the heat exchange plate.

[0084] Advantageously, the ratio between the surface area of ​​the connection zone and the surface area of ​​the orifice is adjusted so that the assembly of the connection face with the assembly zone, at the end of step d), has a tensile strength greater than 1 MPa, advantageously greater than 1.6 MPa, even more advantageously greater than 4.3 MPa.

[0085] Still advantageously, the ratio between the surface area of ​​the connection zone and the surface area of ​​the orifice is adjusted so that the assembly of the connection face with the assembly zone, at the end of step d), presents a seal during the circulation of a fluid at a pressure greater than 1 bar, advantageously greater than 3 bar, even more advantageously greater than 7 bar, for example greater than 9 bar, always for example greater than 11 bar.

[0086] The method according to the present invention may also comprise the implementation of a second step b0) of surface preparation of the connection face and carried out before step b). The second step b0) comprises a plasma treatment and / or a chemical treatment and / or a laser treatment adapted to give the connection zone a surface energy greater than 36 mN / m, advantageously greater than 50 mN / m. This latter aspect thus makes it possible to ensure better wettability of the connection zone by the adhesive substance.

[0087] Surface energy can be measured with a goniometer (e.g., the Krüss Mobile Surface Analyzer (MSA). The method used involves a double droplet, including the measurement of the contact angle of two drops of different liquids (water and diiodo-methane), followed by a calculation of the surface energy of the solid.

[0088] According to a particularly advantageous embodiment and which essentially incorporates the characteristics described above, the method according to the present invention may comprise the execution of a step c0). In particular, this step c0) is executed before step c). As illustrated in, step c0) comprises the positioning of a seal 32 (for example an O-ring or a lip seal), in a groove 33 formed on the connection face, and interposed between the opening and the connection zone. The seal 32 advantageously comprises at least one of the materials chosen from: EPDM, NBR, HNBR, FKM, AEM, FVMQ, Silicone. Advantageously, the second treatment step is not applied to the groove.

[0089] This is a schematic representation of a step c) of assembling the assembly zone and the connection zone when the installation of the joint 32 is considered. In particular, the assembly step c) comprises the application of a force, called an assembly force, adapted to keep the joint compressed in a range of 10% to 35% until a predetermined level of crosslinking of the adhesive substance is reached, the predetermined crosslinking being a crosslinking making it possible to maintain the compression of the joint at a compression level of between 10% and 35% as soon as the assembly force is no longer applied.

[0090] The degree of crosslinking of an adhesive depends on its chemistry and thermal history. A person skilled in the art, based on their general knowledge and the chemistry in question, will be able to establish the best conditions for achieving a given degree of crosslinking.

[0091] It is understood that the device thus obtained may be without the seal 32. Indeed, the adhesive substance 27 certainly has the function of ensuring an assembly of the different elements, but also, depending on its chemical and / or physical properties, of making the assembly watertight according to the specifications defined in the present statement.

[0092] The invention also relates to a heat exchange device which essentially incorporates the characteristics described above.

[0093] The invention also relates to a motor vehicle provided with a battery pack coupled to the heat exchange device according to the present invention, for the purpose of regulating the temperature of the battery pack by said heat exchange device.

[0094] Of course, the invention is not limited to the embodiments described and variant embodiments can be made without departing from the scope of the invention as defined by the claims.

Claims

A heat exchange device comprising: - a main member (10) having a substantially flat assembly face (12) made of aluminum, and providing a fluid circulation channel opening through an orifice (11) disposed on the assembly face (12) of said main member (10); - a connecting end (20) comprising a flat connection base (22), the connection base (22) comprising a face, referred to as the connection face (25), through which an opening (24) of a connection channel (23) opens, the connection base (22) being assembled with the main member (10) by means of an adhesive substance (27) bonding an assembly zone (13) of the assembly face (12), peripheral to the orifice (11), with a connection zone (26) of the connection face (25) and peripheral to the opening (24), the opening (24) and the orifice (11) being in correspondence with each other,the adhesive substance (27) comprising either an epoxy adhesive, a polyurethane adhesive, an acrylic adhesive, or a hybrid adhesive, the hybrid adhesive comprising at least two chemical functions selected from the epoxy function, the cyanoacrylate function, the acrylic function, the polyurethane function, the connecting end comprising an internal wedge (28), advantageously annular or oblong in shape, projecting from the connecting zone (26) and circumscribed by said connecting zone (26), the internal wedge (28) being configured to define a volume, called the adhesion volume (30), between the connecting zone (26) and the assembly zone (13) and in which the adhesive substance (27) is housed. Heat exchange device according to claim 1, in which the adhesive substance (27) mechanically, advantageously chemically, and in a hermetic manner, bonds the assembly zone (13) with the connection zone (26). Heat exchange device according to claim 1 or 2, wherein the nozzle also includes a peripheral wedge (29) projecting from the connection zone (26) and which circumscribes the connection zone (26) so as to delimit, with the internal wedge (28), the adhesion volume (30). Heat exchange device according to any one of claims 1 to 3, wherein a seal (32), advantageously an O-ring or a lip seal made of EPDM or silicone, is disposed in a groove (33), formed on the connecting face (25), and interposed between the opening (24) and the internal wedge (28), said internal wedge (28) being interposed between the adhesive substance (27) and the groove (33), advantageously the seal (32) is in a compressed state in a range of 10% to 35% with respect to its free volume. Heat exchange device according to any one of claims 1 to 4, wherein the ratio between the surface area of ​​the connection zone (26) and the surface area of ​​the orifice (11) is adjusted so that the assembly of the connection face (25) with the assembly zone (13) has a tensile strength greater than 1 MPa, advantageously greater than 1.6 MPa, even more advantageously greater than 4.3 MPa. Heat exchange device according to any one of claims 1 to 4, wherein the ratio between the surface of the connection zone (26) and the surface of the orifice (11) is adjusted so that the assembly of the connection face (25) with the assembly zone (13), at the end of step d) exhibits a seal when circulating a fluid at a pressure greater than 1 bar, advantageously greater than 3 bar, even more advantageously greater than 7 bar. Motor vehicle equipped with a battery pack coupled to the heat exchange device according to any one of claims 1 to 6, for the purpose of thermal regulation of the battery pack by said heat exchange device. Method of connecting a conduit, by means of a connecting end fitting (20), with a main member (10) having a predominantly flat assembly face (12) comprising aluminum, said main member (10) having a fluid circulation channel opening through an orifice (11) disposed on the assembly face (12), the connecting end fitting (20) comprising a flat base, referred to as the connecting base (22), the connecting base (22) comprising a face, referred to as the connecting face (25), through which an opening (24) of a channel, referred to as the connecting channel (23), of said connecting end fitting (20) opens, the method comprising the execution of the following steps: a) a first step of surface preparation of an assembly area (13) peripheral to the orifice (11), the first step comprising a laser treatment and / or an abrasion treatment and / or a chemical treatment advantageously electrochemical;b) a step of depositing an adhesive substance (27) on one and / or the other of the assembly area (13) and a joining area (26) of the joining face (25) and peripheral to the opening (24), the adhesive substance (27) comprising either an epoxy adhesive or a polyurethane adhesive or an acrylic adhesive or a hybrid adhesive, the hybrid adhesive comprising at least two chemical functions from among the epoxy function, the cyanoacrylate function, the acrylic function, the polyurethane function;(c) an assembly step of the assembly zone (13) and the connecting face (25) the connecting end comprising an internal wedge (28), advantageously annular or oblong in shape, projecting from the connecting zone (26) and circumscribed by said connecting zone (26), the internal wedge (28) being configured to define a volume, called the adhesion volume (30), between the connecting zone (26) and the assembly zone (13) and in which the adhesive substance (27) deposited during the execution of step (b) is housed.; Fluidic connection method according to claim 8, wherein said method includes a heat treatment step d) for crosslinking the adhesive substance (27). Fluidic connection method according to claim 8 or 9, wherein step c) is preceded by a step c0) which includes the positioning of a seal (32), in particular an O-ring or a lip seal, in a groove (33) formed on the connection face (25), and interposed between the opening (24) and the connection area (26). Fluidic connection method according to claim 10, wherein the assembly step c) comprises the application of a force, referred to as the assembly force, adapted to maintain the seal (32) compressed in a range of 10% to 35% until a predetermined level of crosslinking of the adhesive substance (27) is reached, the predetermined crosslinking being a crosslinking that maintains the compression of the seal (32) at a compression level between 10% and 35% as soon as the assembly force is no longer applied. Fluidic connection method according to any one of claims 8 to 11, wherein the ratio between the surface of the connection zone (26) and the surface of the orifice (11) is adjusted so that the assembly of the connection face (25) with the assembly zone (13), at the end of step d), has a tensile strength greater than 1 MPa, advantageously greater than 1.6 MPa, even more advantageously greater than 4.3 MPa. Fluid connection method according to any one of claims 8 to 11, wherein the ratio between the surface of the connection zone (26) and the surface of the orifice (11) is adjusted so that the assembly of the connection face (25) with the assembly zone (13), at the end of step d) exhibits a seal when circulating a fluid at a pressure greater than 1 bar, advantageously greater than 3 bar, even more advantageously greater than 7 bar. Fluidic joining method according to any one of claims 8 to 13, wherein the first preparation step includes the removal of a layer of native aluminum oxide that may be present on the assembly area (13), and the adjustment of the roughness of said assembly area (13) in a roughness range between 1.4 µm and 2.6 µm, advantageously greater than 1.9 µm, the first step implementing a LASER process or a mechanical abrasion process. Fluidic connection method according to any one of claims 8 to 13, wherein the first preparation step includes the formation of an adhesion layer (14) on the assembly area (13), advantageously the adhesion layer (14) is formed according to at least one of the following sub-steps: - an anodizing or chemical conversion treatment of the assembly area (13) - the formation of a Ti / Zr layer on the assembly area (13). Fluidic connection method according to any one of claims 8 to 15, wherein said method comprises a second step b0) surface preparation of the connection face (25) and carried out before step b), the second step b0) comprises a plasma treatment and / or a chemical treatment and / or a laser treatment suitable to impart to the connection face (25) a surface energy greater than 36 mN / m, advantageously greater than 50 mN / m.