Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
  • H01M10/625—Vehicles
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
  • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
  • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
  • F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
  • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
  • F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
  • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
  • F28D15/0283—Means for filling or sealing heat pipes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
  • F28D7/0025—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
  • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
• • 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
  • H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
• • 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
  • H01M2220/00—Batteries for particular applications
  • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/10—Energy storage using batteries

Definitions

• the invention relates to a thermal control device for a motor vehicle battery module, for cooling or heating the battery or batteries of a motor vehicle including electric, hybrid or all-electric type.
• the invention also relates to a method for manufacturing said control device.
• the temperature of the batteries must be maintained within the range of 15 ° C to 35 ° C and more specifically between 20 and 30 ° C.
• the heat pipes generally comprise a heat exchanger and a bundle of heat pipes arranged substantially in parallel.
• the heat pipes have first ends whose surface is intended to be in thermal contact with a battery of the motor vehicle and second ends whose one surface is in thermal contact with the heat exchanger.
• They comprise respectively a filler cap, a closure cap and a central trunk delimiting a plurality of bypass channels, in which is enclosed a phase change fluid.
• the heat exchanger meanwhile, has a fluid inlet, a fluid outlet and at least two tubes defining two bypass guide circuits between the inlet of a coolant and its outlet.
• the axis of each tube is oriented substantially perpendicular to the longitudinal direction of the heat pipes and the second ends of the heat pipes each have a surface in thermal contact with one of the tubes.
• the tubes of the heat exchanger are made by processes, such as electro-welding, limiting the possibilities of realization at reduced cost of the exchanger.
• the objective of the present invention is therefore to provide an improved thermal control device for a motor vehicle battery module, functionally similar to that described above, but which is simpler and less expensive to manufacture.
• the subject of the invention is a thermal control device for a motor vehicle battery module, comprising a heat exchanger and a heat pipe bundle having at least one surface intended to be in thermal contact, on the one hand with a battery of the motor vehicle and, secondly, with the heat exchanger, said heat exchanger comprising at least one inner wall in contact with said surface of the heat pipes and at least one outer wall delimiting with said inner wall a circulation space for a fluid.
• said inner and outer walls each comprise a plate.
• said inner wall is covered on both sides with a filler metal and said outer wall is covered with said filler metal on one of its faces, located opposite said circulation space. . In this way it will be possible to avoid brazing the exchanger on its brazing support during the manufacture of the exchanger.
• said plates are, for example, made from a metal sheet, in particular aluminum or an aluminum alloy, by a cold forming operation.
• a metal sheet in particular aluminum or an aluminum alloy
• Said plates preassembled to one another by crimping so as to form said circulation space.
• Said fluid circulating in the exchanger is, for example, a heat transfer fluid. It may also be, in particular, a refrigerant.
• Said heat exchanger may further comprise at least one inlet nozzle and at least one outlet nozzle for the circulation of said fluid.
• said heat exchanger may comprise two elements each having an inner wall and an outer wall and intended to be in thermal contact with two faces of said heat pipes, said elements being geometrically identical. This results in a greater reduction in costs by reducing the number of elementary parts to be produced, and doubling the length of the series for the manufacture of these elements.
• the two elements are in contact with each other at at least a portion of their inner walls and positioned relative to each other following a 180 ° rotation. .
• the circulation spaces of the two elements are placed in communication with each other, the heat exchanger having only one inlet nozzle and a single outlet nozzle.
• This configuration further reduces costs, with the elimination of the manufacture of one nozzle out of two.
• Long ends of said plates may comprise stampings at which the contact between the two elements is made.
• the stampings of the plate forming the inner wall of said elements advantageously have an opposite orientation on either side of the corresponding plate so as to create a clearance to accommodate one longitudinal end of the other element.
• Said longitudinal ends of the elements which engage in said recesses comprise openings for introducing therein said inlet and / or outlet nozzles.
• the heat pipes are closed at their end located on the heat exchanger side by a filler plug.
• Said plug is preferably made from a metal sheet, in particular aluminum or an aluminum alloy, by a cold forming operation. The same reduction in cost is thus applied to the filler plug obtained with the elements of the heat exchanger.
• At least one wall of the filler plug is made integrally with at least one of the walls of said heat exchanger.
• the filler cap is formed by wall extensions of the two elements of said heat exchanger, assembled with each other. This method of production further reduces the number of elementary pieces to be produced.
• a junction line of said extensions comprises along its length openings capable of forming access to the inner cavities of the heat pipes for their filling fluid.
• the invention also relates to a motor vehicle battery module comprising at least one battery, characterized in that it comprises at least one thermal control device as described above.
• said battery module is characterized in that it comprises at least two batteries stacked on each other with a thermal control device interposed between two successive batteries.
• the invention also relates to a method for manufacturing a thermal control device for a motor vehicle battery module as described above, characterized in that:
• the heat pipes and the inner and outer walls of the element or elements intended to form the heat exchanger are manufactured separately, said walls being made by cold forming,
• the one or more elements are closed by positioning, if necessary, inside the heat exchanger, one or more disrupters, so as to form a circulation space for a coolant,
• the heat pipes, the filling and exhaust plugs of said heat pipes, the inner and outer walls are manufactured separately in a first step.
• the element or elements intended to form the heat exchanger said walls being made by cold forming, the inlet and outlet nozzles of said exchanger, and optionally one or more disrupters,
• the inner walls of the elements of the heat exchanger are covered on their two faces, the outer walls of the said exchanger on one side, as well as the internal walls of the said plugs, solder metal layer,
• the ends of the at least one non-brazed element are closed by crimping, by positioning, if necessary, inside the heat exchanger, the at least one interfering element, so as to form a circulation space for a coolant,
• the filler plug is formed by two walls made by a cold forming operation, said walls joining at a junction line in the holding tool and being covered with filler metal at the level of a joining line. of said junction line for soldering along that line during the final assembly step.
• said walls of the filler plug are made in continuity with the inner or outer walls of the elements of said heat exchanger, during the same cold forming operation.
• the operation of forming said walls of the filler cap is effected by providing indentations on one of the edges of said walls, so as to generate openings along the junction line of the two walls.
• the tubes are positioned in the holding tool at said junction line, said tubes being brazed to the filler cap during the simultaneous brazing of the other elements.
• FIG. 1 is a representation according to a front view of a control device thermal device for a motor vehicle battery module according to the prior art
• FIG. 2 is a diagrammatic and perspective view, in a side view, of a heat pipe of the device of FIG.
• FIG. 3 is a diagrammatic and perspective representation of an example of a battery module comprising two batteries and the thermal control device of FIG. 1,
• FIG. 4 is a representation according to a front view and in partial section of an embodiment of a thermal control device according to the invention
• FIG. 5 is a representation in a plan view of an embodiment of the device of FIG. 4, and
• FIG. 1 represents a thermal control device 1, according to the prior art, for a motor vehicle battery module, particularly an electric vehicle, of the hybrid or all-electric type.
• the thermal control device 1 conventionally comprises a heat exchanger 3 and a bundle of heat pipes.
• the device 1 illustrated in FIG. 1 thus comprises a bundle 4 comprising eight heat pipes 5.
• a heat pipe 5 (or "heat pipe” in English) is in the form of a hermetic enclosure which encloses a fluid in equilibrium with its gaseous phase and its liquid phase, in the absence of any other gas. It is therefore a two-phase fluid.
• an organic fluid can be mentioned, that is to say comprising molecules of carbon, hydrogen, and oxygen.
• the heat pipe 5 has a generally elongate shape along a longitudinal axis L ( Figures 1 and 2).
• the latter comprises a filler cap 6, a closure cap 7 and a central trunk 8 delimiting a plurality of channels 9 (only one of which is shown in FIG. bypassing between the filler cap 6 and the closure cap 7.
• the channels 9 are for example identical and parallel to each other within the central trunk 8. Their inner walls have profiles configured to guide the liquid by capillarity from one end to the other of the heat pipe 5.
• each heat pipe 5 may further comprise a pipe 15 which makes it possible to communicate with the interior of the hermetic enclosure of the heat pipe, in order to fill it or to empty it of its fluid. biphasic.
• the outlet 15 is then inserted and sealed to the filler cap 6.
• the heat pipes 5 may have a closable hole in the filler cap 6, which communicates directly with the interior of the hermetic enclosure for the filling of the heat pipe 5. Access to the internal cavity to the heat pipe is then carried out, without the jet, by the introduction of a syringe, or any other similar device, into this closable hole.
• the channels 9 are closed at one end by the filling plug 6 and at a second end by the sealing plug 7.
• the filling plug 6 comprises at the first end of the central trunk 8, a groove transverse to the longitudinal direction L of the heat pipes, which allows the channels 9 of a same heat pipe to communicate fluidly with each other.
• the closure cap 7 comprises, at the second end of the central trunk 8, a second means of communication of the channels 9 between them.
• the filling plugs and the shutter 6, 7 thus have the function of allowing the channels 9 of the heat pipe 5 to communicate with each other, the closing of the channels 9 with respect to the outside and the eventual mounting of the tubes 15 for the emptying / filling of the heat pipe 5 .
• the heat pipes 5 (central trunks 8, filling plugs 6, plugs 7 and possible tubes 15) are, in known manner, made of a metallic material, and for example entirely of aluminum which has excellent thermal conductivity.
• the multichannel central trunks 8 are made, for example, by extrusion and then cut to the desired length.
• the tubes 15 are, for their part, soldered to the filler cap 6, which ensures the tightness of the assembly.
• the heat exchanger 3 it conventionally comprises two tubes
• the tubes 22, 23 defining two guiding circuits for the circulation of a fluid, such as water or brine, in connection between the fluid inlet 20 and the fluid outlet 21 (see arrows on the Figures 1 or 6).
• the axes of the tubes 22, 23 are oriented substantially perpendicular to the longitudinal direction L of the heat pipes 5.
• the second ends 5b of the heat pipes 5 of the beam 4 are interposed between the two tubes 22, 23, which sandwich them, each of the second ends. 5b thus having a surface in thermal contact with one of the tubes 22 or 23.
• a "cold" fluid entering through the fluid inlet 20, flows through the guiding circuits of the tubes 22, 23, and exits through the fluid outlet 21. As it traverses the tubes 22, 23, the fluid recovers the energy of the heat pipes 5 and discharges it into a network of fluid connected to the fluid outlet 21.
• the fluid network discharges excess heat, for example by an external radiator on the front of the vehicle.
• the cold fluid is cooled by a refrigerant of an air conditioning loop of the vehicle.
• the tubes 22, 23 thus make it possible to dissipate the heat accumulated by the second ends 5b of the heat pipes 5.
• it is a "hot” fluid that flows through the guiding circuits of the tubes 22. 23, which transfers energy to the heat pipes 5.
• the circulation of the fluid in the tubes 22, 23 is thus used to supply or dissipate heat to the heat pipes 5, without increasing the bulk of the battery module 10.
• the tubes 22, 23 comprise a turbulator 24, housed in the guiding circuit (visible in FIG. 6).
• the turbulator 24 extends along the guiding circuit and has for example a substantially corrugated shape in the transverse direction of the tubes 22,
• the corrugations of the turbulator 24 thus form heat exchange fins which promotes heat exchange between the fluid flowing through the tubes 22, 23 and the tubes 22, 23.
• the fins of the turbulators 24 are for example metallic, such as aluminum material and are brazed on the inner walls of the tubes 22, 23 in the guide circuits of the heat exchanger 3, for example at the vertices of their corrugations.
• the control device 1 is integrated in a motor vehicle battery module 10 further comprising at least one battery 11.
• FIG. 3 illustrates an example of a battery module 10, comprising two batteries 11 and a control device 1.
• the batteries 11 are for example electrochemical, in particular of the Lithium-Ion type. Such batteries have the advantage of having a good weight / power ratio: that is to say, they are powerful in relation to their compactness.
• the battery 11 has a substantially parallelepiped shape with two large flat parallel faces.
• the surface of large flat surfaces is of the order of an A4 (300 * 216 mm).
• the thermal control device 1 is assembled to the batteries so that the first ends 5a of the heat pipes 5 are in thermal contact with the battery or batteries 11 and the second ends 5b of the heat pipes 5 are in thermal contact with the heat exchanger 3 (FIGS. 1 and 3).
• thermal contact is meant that the surfaces 12, 13 of the first ends 5a of the heat pipes 5 are plated and fixed against the battery 11 in direct contact, without intermediate, or that these surfaces are plated and fixed against the battery 11 with interposition of a thermally conductive interface promoting the thermal exchange between the battery 11 and the heat pipe 5.
• the battery module 10 may thus comprise several batteries 11 and several thermal control devices 1, the batteries 11 being stacked one on the other, large face against large face, a thermal control device 1 being interposed between two successive batteries 11 as shown in Figure 3.
• the heat pipes 5 are arranged in parallel, that is to say that they are parallel to each other and parallel to the longitudinal axis L, and that the surfaces 12, 13 of the first ends 5a of the heat pipes 5 completely cover the surface of the large face of the battery 11.
• the thermal control device 1 thus makes it possible to control the temperature of the batteries 11 closest to them, with a large exchange surface, almost the entire surface of the battery 11, being intimately interposed in the middle of them, in a simple manner and with a small footprint.
• the invention proposes to make the tubes 22 and 23 in the form of two plates or two half-shells which are obtained, each from two sheets of aluminum folded and cold formed, for example by stamping, then assembled to one another by crimping to define a circulation space of the fluid passing through the exchanger.
• One of the plates forms an inner wall in contact with the heat pipes and a second one of the plates forms an opposite outer wall.
• inlet nozzles 20 and 21 of the cooling fluid which are positioned to be in communication with the circulation space of said fluid.
• Each of the tubes 22 or 23 thus has a substantially parallelepipedal shape extending transversely to the longitudinal direction L, the two aluminum plates that compose them being parallel and spaced from each other by a constant length over the entire length. the face which is parallel to the bundle 4 of heat pipes 5. They nevertheless have at one of their transverse ends a bulge 26 of greater thickness, so as to be able to fix on it, the inlet nozzle 20 or outlet 21 corresponding and adapt its diameter to the flow of fluid coming in or out through this nozzle. Said bulges are made, for example, in the form of stamped portions of said plates.
• the two aluminum sheets meet at their transverse ends where they are fixed to one another by a crimping 27 which ensures the hydraulic sealing of the inside of the tube.
• the invention proposes, rather than giving the two tubes 22 and 23 forms that would be symmetrical to each other with respect to the central plane of the device, to give them a shape. identical, then to position them head to tail with respect to each other, that is to say according to positions which are symmetrical to one another with respect to a central axis oriented in the longitudinal direction L.
• the transverse end 28 of the tubes 22 and 23, which is opposed to that of the bulge 26, deviates from the central plane of the device so as to leave space to accommodate a portion of the bulge-related outgrowth 26 of the other tube and thus give the assembly formed by the two tubes an outer shape which is substantially symmetrical with respect to this central plane.
• the embossed plate forming the inner wall of said elements advantageously has an opposite orientation to each longitudinal end of the corresponding plate so as to create a recess for receiving a longitudinal end of the other element.
• the circulation of the cooling fluid inside the heat exchanger 3 is preferably carried out by a single inlet nozzle 20 and a single outlet nozzle 21, the flow being divided at the inlet nozzle for spread between the two tubes and then joining at the exit nozzle.
• the walls of each of the tubes are pierced, at the contact between the bulge 26 of a tube and the transverse end 28 of the other tube, by holes 29 (visible in Figure 4) which connect the two entities and which form a passage for the fluid, a part of which can thus pass from the tube 22, carrying the inlet nozzle 20, in the tube 23, carrying the outlet nozzle 21.
• an identical passage 29 allows the portion of the fluid that has passed through the tube 22 to pass into the tube 23, and then into the outlet nozzle.
• FIGS. 4 and 5 there are two embodiments of the thermal control device 1, with regard to the means for filling the heat pipes 5.
• FIG. 4 shows an exchanger 3 which is produced in a manner independent of the filling plug 6.
• the latter is here produced in one piece which is intended to trap one end of the heat pipes 5 and which is pierced with several holes in which pass busses 15 for the loading of these heat pipes in two-phase fluid.
• This piece is conventionally made by stamping or cold stamping of a blank, in order to obtain thin plugs.
• the filling plug is, on the other hand, made by joining two aluminum sheets, or an aluminum alloy, which are cold-stamped and soldered to one another at their top, along the central plane of the device.
• These openings are positioned longitudinally on the junction line so as to be in front of the internal cavities of the heat pipes 5 and can be used for the filling thereof. cooling fluid. They thus ensure, by means of syringes placed therein for this purpose, the access function inside the heat pipes, which was previously exerted by the tubes 15. After filling the heat pipes, the openings 31 are closed again. by crimping and their brazed junction to ensure the sealing of the inner part of the heat pipes vis-à-vis the outside.
• each aluminum foil which forms a face of the filling plug 6 is constituted by the extension of one of the aluminum foils which forms a face of a tube 22 or 23; preferably it is formed by the extension of the inner wall or sheet of the tube, that is to say that which is intended to come into contact with the surfaces 12 or 13 of the heat pipes 5.
• Each half of the filler cap 6 is then formed during cold stamping which serves to stamp the inner face of one of the tubes constituting the heat exchanger.
• thermal control device 1 All the components of the thermal control device 1 are a priori made of aluminum material or a low-melting aluminum alloy.
• the thermal control device 1 For brazing in a single pass of all the components together, including the heat pipe bundle 4, the filling plugs 6 and exhaust 7, the heat exchanger 3 and its turbulators 24, the inlet nozzles 20 and 21, it is anticipated that some components whose core is made of aluminum foil, such as aluminum 3300, be covered with a thin layer of material, such as aluminum 4040, 4045 or 4343 having a point less melting than the aluminum material of the heart.
• the constitution of this layer of filler metal and its attachment to the aluminum foils is defined so that it remains attached to said sheet during cold stamping operations.
• this thin layer of aluminum material (or “clad” in English, for “plating” in French), which has a thickness of only a few tenths of a millimeter, then makes it possible to secure the components between they, by melting and migration, in a brazing furnace (at a temperature of the order of 600 ° C).
• the parts concerned by this layer of filler metal are: the internal faces of the plugs 6 and 7, against which the ends of the external surfaces 12 or 13 of the heat pipes 5 are fixed,
• the filler metal is also present at the upper ends of the bulges 26 of the tubes 22 and 23, at the place where the inlet and outlet nozzles 21 of the heat exchanger 3 are fixed. case illustrated in Figure 5 where the heat exchanger 3 and the filler cap 6 are joined in one piece, the filler metal located on the inner face of the inner sheet is extended on the inner face of the half-cap 6 so that it can stick to the inner face of the other half cap to ensure the closure, at the openings 31 near the cap at its upper end.
• the turbulators 24 are inserted into the guide circuits of the respective tubes 22, 23 of the heat exchanger 3.
• the upper ends of the central trunks 8 of the heat pipes 5 are arranged in the filler and closure plugs 6 , 7 and, in the particular case of the embodiment illustrated in FIG. 4, the tubes 15 are assembled to the filling plugs 6 of the heat pipes 5.
• the heat pipes 5 and the tubes 22, 23 of the heat exchanger 3 are installed together in a tooling for temporarily holding all the components of the control device 1 between them, with a slight clearance of the order of the order of 1 10 mm between each component, in order to allow a good migration of the filler metal. Also positioned inlet nozzles 20 and outlet 21 opposite the inlet and outlet ports of the coolant on the bulges 26 of the two tubes.
• the assembly obtained is bonded to secure the multichannel central trunks 8 with the filler plugs 6 and plugs 7 of the heat pipes 5, the turbulators 24 to the inner walls of the tubes 22, 23 of the heat exchanger 3, the tubes 22, 23 at the first ends 5a of the heat pipes 5 of the bundle 4 and the heat pipes 5 of the bundle 4 between them, as well as the inlet and outlet nozzles with the tubes of the heat exchanger 3.
• the tubes 15 are made integral with the filler cap 6.
• All pre-assembled components on the tooling are brazed in one operation, with ideal aluminum / aluminum contact between the components, ie without risk of reducing the thermal conductivity, and in a completely leakproof way. .
• the control device 1 thus obtained is simple to manufacture, it requires the implementation of only small components and inexpensive. It allows a precise and effective maintenance of the temperature, typically between 15 ° C and 35 ° C and more particularly between 20 ° C and 30 ° C.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Sustainable Development (AREA)
• Life Sciences & Earth Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Secondary Cells (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Battery Mounting, Suspending (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49998416

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (12)

• 2013
  • 2013-10-10 FR FR1359826A patent/FR3011986A1/fr not_active Withdrawn
• 2014
  • 2014-10-06 US US15/028,171 patent/US20160268654A1/en not_active Abandoned
  • 2014-10-06 EP EP14786636.2A patent/EP3055900A1/fr not_active Withdrawn
  • 2014-10-06 WO PCT/EP2014/071360 patent/WO2015052141A1/fr active Application Filing
  • 2014-10-06 KR KR1020167011998A patent/KR20160068866A/ko not_active Application Discontinuation
  • 2014-10-06 JP JP2016521653A patent/JP2016539454A/ja active Pending
  • 2014-10-06 CN CN201480067689.8A patent/CN106030897A/zh active Pending

Non-Patent Citations (2)

Also Published As

Similar Documents

Legal Events