WO2024246281A1 - Echangeur de chaleur, systeme electronique et vehicule automobile associés - Google Patents
Echangeur de chaleur, systeme electronique et vehicule automobile associés Download PDFInfo
- Publication number
- WO2024246281A1 WO2024246281A1 PCT/EP2024/065027 EP2024065027W WO2024246281A1 WO 2024246281 A1 WO2024246281 A1 WO 2024246281A1 EP 2024065027 W EP2024065027 W EP 2024065027W WO 2024246281 A1 WO2024246281 A1 WO 2024246281A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- housing
- electronic system
- fins
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
- F28D2021/0029—Heat sinks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2240/00—Spacing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/06—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being attachable to the element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
-
- 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 present invention relates generally to the cooling of electronic devices.
- a housing which delimits a sealed housing and which has an inlet opening and an outlet opening for heat transfer fluid, this housing comprising a main wall, and
- Electric or hybrid vehicles include a storage battery.
- a storage battery comprises a housing which houses a large number of electrochemical cells connected together in such a way that the voltage across the battery terminals is high. This voltage can typically be several hundred Volts.
- the present invention proposes to directly cool the hot spots of the housing.
- the invention provides a heat exchanger as defined in the introduction, in which the following is provided:
- the main wall has a main opening which is bordered on the side of the watertight housing by a tube
- the at least two fins each have an opening engaged on the tube so as to be in contact with the latter.
- the hot spots are generally located at the level of the fixing elements of the bus bar.
- the invention here proposes to cleverly combine the fixing of the heat exchanger with the fixing of this bus bar, so as to cool the hot point as closely as possible.
- the fixing element (screw, snap-in pin, etc.) is therefore introduced into the heat exchanger, through its main opening and its tube.
- the heat exchanger is in thermal contact with the fixing element over its entire height.
- the use of the fixing element to fix the heat exchanger makes it possible not to add any additional fixing means and thus to optimize the size and mass of the assembly.
- the heat exchanger is fixed by tightening the fixing element on the tube. In this way, no force is applied to the fins, and the fins are not deformed by the fixing of the cooling system.
- the housing comprises a partly cylindrical side wall with a flat surface and in which the main wall and the at least two fins have contours of partly circular and partly straight shapes;
- the housing has an electrically insulating coating on the external face
- each fin comprises a main plate and a stop projecting from the main plate to maintain a spacing between the main plates of the fins, said stop preferably having an annular shape running along the edge of said opening.
- bus bar adapted to carry electric current between the electronic components and fixed to the platform using at least one fixing element
- the platform comprises at least one heat transfer fluid outlet conduit connected to said inlet and/or outlet opening of said heat exchanger;
- said heat transfer fluid is a gas
- a compressor which is fixed to the platform and which is configured to circulate the gas in said heat exchanger;
- the outlet duct includes a sound reducer
- said heat transfer fluid is a dielectric liquid
- a dielectric liquid reservoir is provided, a dielectric liquid supply line into the inlet opening of the heat exchanger which is equipped with a pump and at least one return conduit configured to convey the dielectric liquid from the outlet opening of the heat exchanger to said reservoir;
- At least one heat transfer fluid flow control valve is provided which is electrically controlled and which is located upstream of said heat exchanger.
- the invention also provides a battery of accumulators for a motor vehicle, comprising electrochemical cells and at least one electronic system as described above.
- the invention also provides a motor vehicle equipped with such a storage battery.
- FIG. 1 is a schematic view of a heat exchanger according to the invention
- FIG. 2 is an exploded view of a portion of the housing and fins of the heat exchanger of Fig. 1;
- FIG. 3 is a schematic view of the housing and fins of the heat exchanger of Fig. 1;
- FIG. 4 is a schematic view of an electronic and/or mechatronic system according to the invention and comprising the heat exchanger of FIG. 1;
- FIG. 5 is a schematic sectional view of part of the electronic and/or mechatronic system of Figure 4.
- FIG. 1 there is schematically shown a heat exchanger 100 intended here to equip an electronic and/or mechatronic system of a battery of accumulators of a motor vehicle.
- This system hereinafter called electronic system 200, will be described in a second part of this presentation.
- the heat exchanger 100 includes a housing 110 which houses fins 120.
- the housing 110 delimits a sealed housing.
- a sealed housing For this purpose, it comprises a main wall 113, a cover 119, and a side wall 116.
- the main wall 113 and the cover 119 are flat and they make it possible to close the sealed housing at the ends of the side wall 116.
- the main wall 113 has a main opening 114 which is bordered on the inside of the sealed housing by a tube 115 which extends to the cover 119.
- the cover 119 has a similar shape but is devoid of a tube.
- the side wall 116 has a cylindrical shape. More precisely, it has a shape of revolution around the axis of the tube 115, with the exception of one side where it has a flat surface parallel to this axis.
- the main wall 113 and the cover 119 then have contours of corresponding shapes (with an arc-shaped part and a straight part).
- the side wall 116 of the housing has an inlet opening 111 and an outlet opening 112 for the circulation of a heat transfer fluid.
- the inlet openings 111 and outlet openings 112 are shown opposite each other, they thus extend along parallel axes and form an angle of 180° around the axis of the tube 115.
- the inlet openings 111 and outlet openings 112 could be placed differently and form any angle, 90° or 45° for example. These openings are however offset in height (along the axis of the tube 115), to promote the passage of the fluid along all the fins 120.
- the inlet 111 and outlet 112 openings are here crossed by end pieces. 111A, 112A facilitating their connection to hoses.
- These end pieces can be metallic (aluminium for example) or made of polymer material (ABS for example). These end pieces are fixed to the side wall 116. They can be screwed, snapped or even glued or welded.
- the inlet 111 and outlet 112 openings may be bare and conduits external to the heat exchanger 100 may be attached thereto.
- At least two fins 120 are provided positioned in the sealed housing.
- the fins 120 are therefore immersed in the heat transfer fluid.
- the heat exchanger 100 here comprises seven fins 120.
- the heat exchanger 120 could comprise dozens of fins 120.
- the fins 120 each comprise a flat main plate 122 and a stop 123 projecting from the main plate 122. They are stacked in the housing, in contact with each other, between the main wall 113 and the cover 119, over the entire height of the housing.
- each fin has an opening 121 engaged on the tube 115.
- the tube 115 is cylindrical of revolution and the openings 121 of the fins are circular. Their diameters are equal, apart from the mounting clearance, so as to ensure effective thermal contact between these elements.
- the tube 115 could be a rectangular parallelepiped and the openings 121 of the fins 120 could be rectangular.
- each stop 123 makes it possible to keep the main plates 122 of the fins at a distance from each other so that the heat transfer fluid can circulate between them.
- each stop 123 is formed as a single piece with the main plate 122 but alternatively, they could be formed from separate pieces.
- the stops 123 here have the shape of washers which border the openings 121, on one side only of the main plates 122. Due to their thickness, they make it possible to maintain a spacing between each of the main plates 122 of the fins 120. For example, the stops 123 have a thickness of 1 mm.
- the fins 120 can thus be assembled so as to be glued to each other, the projections 12 defining a spacing of 1 mm between the main plates 122.
- the main plates 122 here also have a thickness of 1 mm. More generally, the thickness of the main plates 122 can be between 0.4 and 2 mm.
- the main plates 122 of the fins 120 here have an external diameter of 30 mm.
- the housing 110 is adjusted to the dimensions of the fins.
- the main wall 113 of the housing 110 has an external diameter of 34 mm.
- the dimensions of the heat exchanger are not limiting and can be adapted to the dimensions of the electronic system. 200 and hot spots to cool.
- the contact surfaces between the tube 115 and the fins 120 are machined to have minimal roughness to increase thermal contact.
- All the fins 120 are identical here, with the exception of the one placed against the cover 119.
- This fin 120A (figure 2) is in fact distinguished from the others by its stop 123A which has a thickness greater than that of the stops 123 of the other fins 120.
- this stop 123A can engage in the circular opening provided in the cover 119, such that its end face extends to the height of the external face of the cover 119.
- the different parts of the housing 110 are laser welded together, here at the edges of the main wall 113 and the cover 119, as well as between the cover and the aforementioned stop 123A and between the latter and the tube 115, which gives the assembly its hermetic character.
- the heat exchanger 100 is in particular intended to cool an element which is inserted into the main opening 114, through the tube 115.
- the main opening 114 and the tube 115 are adapted to the shape of this element to be cooled so as to maximize the thermal contact between the tube 115 and the element.
- this element exchanges its heat with the tube 115, the tube 115 exchanges its heat with the fins 120 and the fins 120 exchange their heat with the heat transfer fluid.
- the heat transfer fluid forms a continuous flow which passes through the sealed space delimited by the housing 110 and is then renewed, allowing a continuous heat exchange.
- Each fin can thus dissipate up to 100W of thermal power.
- the housing 110 and the fins 120 are here made of aluminum.
- the fins 120 and the tube 115 could be made of any heat-conducting material, preferably metallic, such as for example copper (or aluminum).
- the cover 119 and the side wall 116 of the housing 110 could be made of materials different from that of the tube, for example in a polymer such as ABS.
- the heat exchanger 100 is employed to cool the electronic system 200 illustrated in FIG. 4.
- This electronic system 200 is, in this embodiment, used for connecting a storage battery to the electrical circuit of an electric or hybrid motor vehicle. It thus equips the storage battery and is connected to one of its two electrical terminals. In practice, two identical electronic systems 200 may be used, respectively connected to the two electrical terminals of the battery.
- the electronic system 200 here comprises a platform which supports a bus bar in which the electric current circulates, electronic components, and at least one heat exchanger 100 of the aforementioned type.
- the bus bar is made in several separate parts, each part being fixed to the platform via two fixing elements. It is then preferentially provided as many heat exchangers 100 as there are fixing elements.
- the electronic components here have the function of being able to cut the electric current.
- the platform here accommodates a relay 310, a switch 320 and a fuse 330.
- the relay 310 and the switch 320 play a role similar to the fuse 330, that is to say that they make it possible to open the electrical circuit and therefore to stop the propagation of the electric current in the electrical network of the vehicle.
- the relay 310 is controlled and is used during normal use of the motor vehicle, in particular to cut off the current after the vehicle has been parked.
- the fuse 330 makes it possible to automatically cut off the current in the event of a short circuit.
- the switch 320 is controlled and is here preferably of the “pyroswitch” type: it makes it possible to cut off the current in the event of an accident involving the motor vehicle.
- the bus bar 220 is adapted to transport the electric current between these electrical components. For example, it can carry a current of 500 amperes. Its different parts are here fixed on the platform 210 by means of eight fixing screws 221.
- the bus bar 220 may heat up (due to the electrical components), which generates hot spots, in particular at the level of the fixing screws 221.
- the heat exchangers 100 are then fixed to the bus bar 220 (and therefore to the platform 210) at the level of the fixing screws 221 and by means of these screws.
- the fixing screws 221 allow the fixing of both the bus bar 220 and the heat exchangers 100. They are therefore threaded through the tubes 115 of the heat exchangers 100.
- the fixing is thus carried out by tightening the tube 115 and the main wall 115 against the bus bar, which then makes it possible to exert no force on the fins 120. These fins are thus not deformed and they can therefore perform their heat evacuation function as well as possible.
- This fixing is carried out in such a way that the main wall 113 or the cover 119 of the heat exchanger is applied against the bus bar, to promote heat exchanges.
- thermal pads in English
- layers of thermal paste can be positioned between the heat exchangers 100 and the bus bar 220.
- the main walls 113 and the covers 119 of the housings 110 are machined in order to have minimal roughness for improve thermal contact, even perfect flatness.
- the flat part of the side wall 116 of each housing 110 is placed in contact with one of the electronic components. This flat part also makes it possible to prevent any rotation of the heat exchanger 100 during its fixing, which facilitates its installation.
- the heat exchanger 100 thus makes it possible to occupy a reduced space and to optimize the size of the electronic system 200.
- the heat exchanger 100 represents a low weight and makes it possible not to weigh down the electronic system 200.
- the housing 110 of the heat exchanger 100 here has an electrically insulating coating on its outer face.
- two neighboring heat exchangers 100 are positioned at a distance of at least 2 mm from each other, this distance being in practice here at least 8 mm.
- the platform 210 is further configured to allow the circulation of the heat transfer fluid through the heat exchangers 100.
- Each of these outlet conduits 211 here has a mouth equipped with a seal to receive one of the end pieces 112A of a heat exchanger 100 and an outlet.
- the heat transfer fluid is pulsed air.
- the platform 210 then carries means adapted to circulate this air.
- it carries a compressor 230, for example in the form of a fan.
- This compressor 230 is here connected to the heat exchangers 100 by fluid supply lines 241. It will be noted that these supply lines are preferably made of insulating materials, or at least having high electrical resistances.
- the air may be compressed, i.e., the electronic system 200 may include a pump configured to circulate air through the heat exchangers 100.
- each outlet duct 211 here comprises a sound reducer 212 (FIG. 5).
- the sound reducer here comprises a perforated pipe and, around it, a layer of sound-absorbing material.
- the perforated pipe is for example made of aluminum.
- the sound-absorbing material intended to absorb the sound waves (and therefore the possible whistling of air flow) may consist of basalt, flax or hemp wool for example.
- the sound reducer may be a ball or baffle sound reducer.
- the sound reducer 212 may be screwed or forced into the platform 210.
- the heat transfer fluid may be a dielectric liquid.
- the electronic system 200 comprises a dielectric liquid reservoir, dielectric liquid supply lines 241 to each of the heat exchangers 100 and a liquid return conduit to the reservoir. A pump is then provided to circulate the dielectric liquid to the inlet openings 111 of the heat exchangers 100.
- the electronic system 200 preferably comprises at least one electrically controlled valve 250 (FIG. 4), located at the inlet of at least one heat exchanger 100.
- the electronic system 200 comprises six valves 250 (here solenoid valves) making it possible to regulate the flow rate of heat transfer fluid conveyed to each heat exchanger 100.
- the valves 250 can for example be controlled by a control unit which makes it possible to adapt the flow rate of each heat exchanger 100 according to the temperature detected at the corresponding fixing screw (or the temperature of the fluid at the outlet of the exchanger).
- each fluid inlet could have a shape (for example Venturi) making it possible to regulate the flow of heat transfer fluid for each heat exchanger 100.
- the present invention is in no way limited to the embodiment described and shown, but those skilled in the art will be able to provide any variant in accordance with the invention.
- the heat exchangers 100 could be fixed not at the ends of the parts of the bus bar, but in the middle of these parts.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24730357.1A EP4721175A1 (fr) | 2023-05-31 | 2024-05-31 | Échangeur de chaleur, système électronique et véhicule automobile associés |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2305429 | 2023-05-31 | ||
| FR2305429A FR3149372B1 (fr) | 2023-05-31 | 2023-05-31 | Echangeur de chaleur, système électronique et véhicule automobile associés |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024246281A1 true WO2024246281A1 (fr) | 2024-12-05 |
Family
ID=87801337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065027 Ceased WO2024246281A1 (fr) | 2023-05-31 | 2024-05-31 | Echangeur de chaleur, systeme electronique et vehicule automobile associés |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4721175A1 (fr) |
| FR (1) | FR3149372B1 (fr) |
| WO (1) | WO2024246281A1 (fr) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07104114B2 (ja) * | 1990-02-26 | 1995-11-13 | ロング マニュファクチュアリング リミテッド | 波形循環流路群を備える熱交換器、及びその熱交換器を備える自動車用オイル冷却器とその製造方法 |
| US9627721B2 (en) * | 2010-08-31 | 2017-04-18 | Toyota Jidosha Kabushiki Kaisha | Electricity storage device and vehicle |
-
2023
- 2023-05-31 FR FR2305429A patent/FR3149372B1/fr active Active
-
2024
- 2024-05-31 WO PCT/EP2024/065027 patent/WO2024246281A1/fr not_active Ceased
- 2024-05-31 EP EP24730357.1A patent/EP4721175A1/fr active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07104114B2 (ja) * | 1990-02-26 | 1995-11-13 | ロング マニュファクチュアリング リミテッド | 波形循環流路群を備える熱交換器、及びその熱交換器を備える自動車用オイル冷却器とその製造方法 |
| US9627721B2 (en) * | 2010-08-31 | 2017-04-18 | Toyota Jidosha Kabushiki Kaisha | Electricity storage device and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4721175A1 (fr) | 2026-04-08 |
| FR3149372B1 (fr) | 2026-01-16 |
| FR3149372A1 (fr) | 2024-12-06 |
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