Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
  • H05K7/20927—Liquid coolant without phase change
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/02—Arrangements of circuit components or wiring on supporting structure
  • H05K7/026—Multiple connections subassemblies
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor

Definitions

• Modular electrical assembly comprising an integrated cooling system
• the present invention relates to the field of electrical equipment, in particular for vehicles, in particular for electric or hybrid vehicles. More specifically, the present invention relates to an electrical assembly comprising an integrated cooling system, for electrical power equipment, in particular a DC/DC converter, an electrical charger or an inverter.
• electrical power equipment in particular an inverter, generally comprises at least one electronic power module and one capacitive module, in order to ensure the conversion of electricity from the battery into electricity. usable by the electric motor.
• the inverter also allows the recovery of electricity from the electric motor in order to store it in the battery.
• an electronic power module is meant an assembly comprising components through which the energy supplying the electrical machine passes, in particular intended to transform direct current into alternating currents or vice versa.
• These components may comprise electronic switches, such as for example semiconductor transistors, arranged in an electrical circuit to allow a controlled passage of electrical energy between the high voltage supply battery and the electrical machine.
• the components are bare semiconductor chips for which a package forms a body which provides encapsulation.
• an electronic power module is an assembly comprising a plurality of semiconductor chips forming an electrical circuit encapsulated in the same package.
• electrical power equipment comprises a plurality of electrical components to be cooled.
• a fluid cooling system configured to route a cooling fluid, in particular liquid water, is integrated into the electric motorization systems, in order to cool the plurality of electrical components of power electrical equipment.
• Such a cooling system comprises at least one fluid inlet and one outlet, in order to fluidically connect several portions of the cooling circuit.
• the fluid inlet or outlet takes the form of a nozzle, commonly referred to in English as the “nozzle”, or a sleeve, commonly referred to as the English term “spigot”.
• Said cooling system must generally satisfy many constraints in terms of size, accessibility and cooling efficiency.
• document US 2018219488 A1 describes electrical power equipment comprising a chassis, a plurality of electrical components to be cooled, in particular a power electronic module, and an integrated cooling system .
• the cooling system described by document US 2018219488 A1 comprises two cooling modules providing four main heat exchange surfaces, in order to cool the plurality of electrical components.
• the chassis described by document US 2018219488 A1 includes channels arranged in the mass of the chassis configured to put the two cooling modules in fluidic connection, making it complex and expensive to produce such a chassis.
• the implementation of such a frame requires expensive molding technology, in particular a casting process under gravity with the use of cores, and requires carrying out a large part of the tests, in particular sealing tests, at the end manufacturing process for electrical power equipment, which is costly in the event of non-validation of said sealing tests.
• the fluid inlet and outlet generally form part of the same frame element and the positioning of the fluid inlet and outlet is generally restricted to the same side of said frame. This stress is liable to induce the elongation of the cooling circuit, and consequently to cause a pressure drop in the circulation of the fluid, which is not desirable in the cooling circuit.
• the cooling systems for electrical power equipment require the use of a plurality of seals.
• the electrical power equipment described by document US 2018219488 A1 requires at least three seals in addition to the seals positioned at the fluid inlet and outlet, including a seal. sealing having a perimeter of the same order of magnitude as the perimeter of the electrical module to be cooled. It is desirable to reduce, as much as possible, the sealing areas in order to reduce the probability of leakage of the coolant and to allow the use of standard seals.
• the electrical power equipment incorporating a cooling system has a modular structure, to form an independent and sealed assembly, in order to allow standardization and simplified manufacturing and less costly electrical power equipment having in particular a reduced set of sealing areas to ensure.
• the invention thus proposes a modular electrical assembly comprising an integrated cooling system, configured to be part of electrical power equipment.
• the invention relates to an electrical assembly, in particular intended to be embedded in an electric or hybrid motor vehicle, comprising a housing, at least one electrical module, said at least one electrical module having at least one electrical component to to cool, a cooling module comprising at least two fluid orifices, for respectively ensuring the delivery and evacuation of a cooling fluid into and from the cooling module, at least one cooling channel provided in said cooling module , configured to form a cooling circuit portion and ensure a fluid connection between said fluid orifices, said at least one electric module relating to said cooling module, in order to ensure the cooling of said at least one electric module, said housing relating to said cooling module so as to define a free volume, said free volume re housing said at least one electrical module so as to form an independent module configured to relate to a chassis of electrical equipment.
• An electrical assembly according to the invention has the consequent advantage of limiting the sealing zones to be ensured, thus reducing the risks of fluid leakage, and of having a modular structure configured to relate to electrical equipment. Consequently, the characteristic of modularity of the invention impacts both the industrial processes of manufacturing, production, and carrying out tests of electrical equipment.
• the invention facilitates the standardization of equipment and makes it possible to implement parallel production lines.
• the invention makes it possible to carry out sealing tests of the electrical assembly according to the invention independently of the rest of the electrical equipment. Consequently, the present invention has a considerable advantage from the point of view of the industrialization of electrical equipment.
• the electrical assembly according to the invention has an electrical connector, and a through opening arranged in the cooling module, the through opening being configured to allow the connection of the electrical connector on one side to the module electrical and on the other hand to an electrical module external to the electrical assembly, the electrical connector being adapted to ensure the electrical connection between the electrical assembly and the electrical equipment.
• the electrical module comprises at least one electronic power module, configured to allow a transfer of electrical energy via the electrical assembly.
• the cooling module comprises a first face on which the electrical module is attached, a second face opposite the first face, and a side face connecting said first face and said second face of the cooling module .
• one of the two fluid orifices designated first fluid orifice, opens onto said first face or said lateral face of the cooling module.
• one of two fluid orifices designated second fluid orifice, opens onto said second face of the cooling module.
• each of the two fluid orifices consists of a nozzle, a sleeve or a bare orifice, having a sealing means, adapted to ensure a connection of the cooling circuit portion of the cooling module and separate cooling circuit portions external to the electrical assembly.
• electrical power equipment in particular intended to be embedded in an electric or hybrid motor vehicle, comprises a chassis housing an electrical component, and two electrical assemblies according to the invention, the two electrical assemblies relating respectively to the chassis, on either side of the chassis, so that each of the cooling modules respectively integrated into each of the two electrical assemblies has a fluid orifice directly opposite the chassis opening out in particular on said second opposite face to said first face adjoining the respective electrical module of the electrical assembly.
• the cooling modules respectively integrated into each of the two electrical assemblies of the electrical power equipment each have a face facing the electrical component housed in the chassis of the electrical power equipment, at least one of the two faces being in direct mechanical contact with the electrical component housed in said chassis, in order to ensure the cooling of the electrical component by one or by both cooling modules.
• the electrical power equipment comprises an electrical connection system, so as to ensure the electrical connection respectively of each of the electronic power modules integrated in each of the two electrical assemblies to the electrical component housed in the chassis.
• the electrical power equipment forms a DC/DC converter, an electrical charger or an inverter.
• the invention further relates to electrical power equipment, in particular intended to be embedded in an electric or hybrid motor vehicle, comprising a chassis housing at least one electrical component, and at least one electrical assembly according to the invention, the electrical assembly relating to the chassis.
• said casing of the at least one electrical assembly and said chassis of the electrical equipment form external walls of said electrical power equipment.
• the electrical power equipment may have any of the characteristics described above.
• the electrical power equipment comprises two electrical assemblies according to the invention, the two electrical assemblies relating respectively to the frame, on either side of said frame, so that each of the cooling modules respectively integrated into each of the two electrical assemblies has a fluid orifice facing each other direct from the chassis opening out in particular on said second face opposite to said first face adjoining the respective electrical module of the electrical assembly.
• FIG. 1 represents a view of an example of an electrical assembly according to the invention
• FIG. 2 represents a sectional view of an example of an electrical assembly according to the invention
• FIG. 3 represents a sectional view of an example of an electrical assembly according to the invention
• FIG. 4 represents a view of an example of electrical equipment comprising two examples of electrical assemblies according to the invention
• FIG. 5 represents an exploded view of an example of electrical equipment comprising two examples of electrical assemblies according to the invention
• FIG. 6 represents a view of an example of an electrical assembly according to the invention.
• the invention relates to an electrical assembly 1 comprising a housing 13, at least one electrical module 11, said at least one electrical module 1 1 having at least one electrical component to be cooled, a cooling 12 comprising at least two fluid orifices (122-123), for respectively ensuring the routing and the evacuation of a cooling fluid in and from the cooling module 12, at least one cooling channel 121 arranged in said cooling module 12 configured to form a circuit portion of cooling and providing fluid connection between said fluid ports (122-123).
• the box 13 is a cover for the electrical module 11.
• Said at least one electric module 11 relates to said cooling module 12, in order to ensure the cooling of said at least one electric module 11 .
• the cooling module 12 comprises a first face 12A on which said electrical module 11 is attached, a second face 12B opposite said first face 12A, and a side face 12C connecting the two opposite faces 12A and 12B.
• one of said at least two fluid orifices 122-123 opens onto said first face 12A or said side face 12C of the cooling module 12, said corresponding fluid orifice is then designated first fluid orifice 122 , another of said at least two fluid orifices 122-123 opens onto said second face 12B of cooling module 12, said corresponding fluid orifice is designated second fluid orifice 123.
• Said housing 13 relates to said cooling module 12 so as to define a free volume, said free volume housing said at least one electrical module 11, so as to form together a sealed independent module, configured to relate to a chassis 2 of electrical equipment, in particular electrical power equipment.
• An electrical assembly 1 according to the invention is thus qualified as an "independent module” in the sense that it allows direct assembly and without affecting the integrity of the electrical assembly 1, of said electrical assembly 1 to a power electrical equipment. Therefore, in particular, it is possible to test an electrical assembly 1 independently, before attaching it to a chassis 2, so that if a fault is detected during the assembly of the electrical assembly 1 to the chassis 2, said electrical assembly remains qualified and only its assembly on another functional chassis 2 is required.
• the invention further comprises the assembly of the electrical module 1 1 to the cooling module 12, and the assembly of the housing 13 to said electrical module 11 and to the cooling module 12 so as to cover the electrical module 11, by for example by means of a plurality of screws, in order to ensure mechanical protection of the electrical assembly 1 and in particular of the electrical module 11 .
• the invention also comprises at least one electrical connector 14 and at least one through-opening 124 provided in the cooling module 12, said at least one through-opening 124 being configured to allow connection said at least one electrical connector 14 on one side to the electrical module 11 and on the other side to an electrical module external to the electrical assembly 1, said at least one electrical connector 14, adapted to ensure the connection electrical between the electrical assembly 1 according to the invention and electrical power equipment.
• Figures 4 and 5 show electrical power equipment 100 comprising a frame 2 housing at least one electrical component, in particular a capacitive module, and two of the electrical assemblies 1 according to the invention , reported respectively on one side and the other of the frame 2, so that each of the cooling modules 12 respectively integrated into each of the two electrical assemblies 1, has a face directly opposite the capacitive module housed in frame 2, at least one of the two faces being in direct mechanical contact with the capacitive module housed in said frame 2, in order to ensure the cooling of said capacitive module by at least one of the cooling modules 12 of said two electrical assemblies 1.
• the direction of circulation of the cooling fluid shown is not limiting; it is only an illustration to visualize a possible topology of the cooling circuit.
• the operating temperatures of the various electrical components, and in general, the prioritization given to the cooling of this or that electrical component partly determine the direction of circulation of the cooling fluid.
• said cooling module 12 of the electrical assembly 1 comprises a fixing means at the level of the face 12B, configured to allow the mounting of said electrical component housed in the frame 2 to the electrical assembly 1 . Therefore, according to a first embodiment of the electrical power assembly 100 illustrated in Figures 4 and 5, the electrical component housed in the frame 2 is directly mounted to the electrical assembly 1. According to a second embodiment of the electrical power assembly 100 illustrated in FIGS. 4 and 5, the electrical component housed in the chassis 2 is mounted on an element external to the electrical assembly according to the invention 1, in particular at the frame 2.
• the electrical power equipment 100 illustrated in Figures 4 or 5 comprises at least one electrical connection system, so as to ensure the electrical connection respectively of each of the electronic power modules of the two electrical assemblies 1 to the capacitive module housed in the chassis 2.
• Said electrical connection system comprises in particular the electrical connector 14, an example of which is illustrated in FIG. 6.
• the cooling circuit is not necessarily integrated into the foundry part that is said frame 2, which simplifies its design, manufacture and testing, and thus allows the reduction of the costs incurred. .
• the frame 2 can include a intermediate portion of the cooling circuit, in particular simple so as not to complicate its design and its manufacture.
• the intermediate portion of the cooling circuit makes it possible in particular to guide the cooling fluid from one independent electrical assembly 1 to another.
• the intermediate portion of the cooling circuit of the chassis 2 makes it possible to guide the cooling fluid between two of said respective second fluid orifices 123 of the two independent electrical sets 1.
• the two remaining fluid orifices 122 in other words not ensuring the connection to the intermediate portion of the cooling circuit of the frame 2, can be located on the first face 12A or on the side face 12C respectively of each of the two cooling modules 12.
• said box 13 makes it possible to dispense with a chassis which covers all of the electrical power equipment in one piece, and thereby reinforces the modularity conferred by the invention.
• the material of said housing 13 in particular consists of an electrical and/or electromagnetic insulating material, in order to ensure the electrical and/or electromagnetic insulation respectively of said electrical module 11 .
• the material of the housing 13 may differ from the material of the cooling module 12 and from the material of the chassis 2, so as to allow a gain, for example in terms of cost, or to obtain different physical properties.
• the electrical module 11 comprises at least one electronic power module 11, configured to allow a transfer of electrical energy via said electrical assembly 1.
• said at least one electronic power module 11 comprises a base plate, forming an interface between said at least one electrical component to be cooled and the cooling module 12, so as to provide a heat exchanger function between said at least one electrical component to be cooled and the cooling module 12.
• Said cooling module 12 forms in particular a sealed system of generally parallelepiped shape, comprising a cooling circuit portion, configured to allow the circulation of said cooling fluid in an optimal manner according to the physical distribution of the electrical components to be cooled.
• the cooling module 12 has a cavity housing said at least one cooling channel 121, said base plate being in direct mechanical contact with the cooling module 12 at the level of the first face 12A, in order to ensure the cooling of the power electronic module 11 by conduction.
• This embodiment of an electrical assembly 1 according to the invention has the advantage of limiting the sealing zones to be provided in the electrical assembly 1 .
• said at least one cooling channel 121 has a partial opening opening onto the first face 12A of said cooling module 12 facing said base plate. Said partial opening cools said at least one electronic power module 11 by bringing said base plate into direct contact with the cooling fluid.
• Said base plate has in particular a substantially flat surface or a surface comprising pins projecting into the cooling channel 121, depending on the desired cooling efficiency.
• This embodiment of an electrical assembly 1 according to the invention has sealing zones to be provided around the partial opening of said cooling channel 121, but nevertheless allows improved cooling compared to the electrical assembly 1 according to the embodiment shown in Figure 2.
• cooling module is not limited to these two embodiments, described solely by way of example.
• choice of embodiment will then mainly result from a compromise between the desired cooling efficiency and the extent of the sealing zones to be ensured.
• the fluid orifices 122-123 can take the form of a nozzle, a sleeve or a bare orifice, provided with a sealing system.
• the shapes of the fluid ports 122-123 may differ from each other.
• an electrical assembly according to the invention comprising an integrated cooling system configured to be part of electrical power equipment, has the advantage of limiting the sealing zones to be ensured and of presenting a structure modular.
• the sealing zones to be ensured are limited to said fluid orifices 122-123, and, if necessary, to a zone of partial opening of the cooling module 12 according to one embodiment of the invention. .
• the modularity characteristic of the invention allows the distribution of functional attributes independently by element of electrical power equipment.
• the cooling function can be ensured by an electrical assembly according to the invention.
• an electrical assembly according to the invention or elements external to the invention of the electrical power equipment can fulfill functions of electrical and/or electromagnetic insulation of the electrical power equipment.
• the invention facilitates the standardization of equipment and makes it possible to implement parallel production lines, by way of example, one ensuring the assembly of the module power electronics 11 to the cooling module 12 and the other the assembly of an electrical module to the frame 2.
• parallel production lines by way of example, one ensuring the assembly of the module power electronics 11 to the cooling module 12 and the other the assembly of an electrical module to the frame 2.
• technologies for the production of the frame 2 that are simpler and better adapted to the production in large series.
• the invention makes it possible to perform leak tests on the electrical assembly 1 according to the invention independently of the frame 2.
• the housing 11 and the frame 2 form the outer walls of the electrical power equipment 100.
• the housing 11 and the frame 2 provide protection mechanism for the components of the electrical power equipment 100 against attacks external to the electrical power equipment 100. It is therefore not necessary to provide an additional chassis for the electrical equipment 100 in which the electrical assembly 1 and chassis 2 would be received.

Landscapes

• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Cooling Or The Like Of Electrical Apparatus (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=73698981

Family Applications (1)

Country Status (5)

Families Citing this family (6)

Family Cites Families (21)

• 2020
  • 2020-08-13 FR FR2008487A patent/FR3113450B1/fr active Active
• 2021
  • 2021-07-15 CN CN202180064276.4A patent/CN116326227A/zh active Pending
  • 2021-07-15 EP EP21745787.8A patent/EP4197301A1/de active Pending
  • 2021-07-15 WO PCT/EP2021/069908 patent/WO2022033802A1/fr not_active Ceased
  • 2021-07-15 US US18/041,306 patent/US12048129B2/en active Active

Also Published As

Similar Documents

Legal Events