EP4449832A1 - Ensemble boitier pour loger un dispositif electronique de puissance - Google Patents
Ensemble boitier pour loger un dispositif electronique de puissanceInfo
- Publication number
- EP4449832A1 EP4449832A1 EP22835434.6A EP22835434A EP4449832A1 EP 4449832 A1 EP4449832 A1 EP 4449832A1 EP 22835434 A EP22835434 A EP 22835434A EP 4449832 A1 EP4449832 A1 EP 4449832A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- kinetic energy
- housing assembly
- elements
- housing
- 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.)
- Pending
Links
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
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
Definitions
- the invention relates, in general, to the technical field of electronic power devices, for example power devices for electric powertrains for motor vehicles. It relates more specifically, although not exclusively, to housing assemblies containing power electronic devices, for example voltage inverter housing assemblies.
- Motor vehicles having a heat engine generally comprise one or more batteries connected to the on-board network, also called service batteries, to supply the equipment of these vehicles, in particular a starter of a heat engine.
- the electric motors used in electric or hybrid motor vehicles generally consist of electromechanical, synchronous or asynchronous converters, the operation of which most often requires the use of three-phase alternating currents. Nevertheless, the electric batteries of these vehicles deliver direct currents, which must then be converted into currents alternatives.
- An inverter positioned close to an electric motor within an electric powertrain makes it possible, among other things, to convert a direct current into an alternating current.
- an inverter is made up of sub-components that are fragile and poorly adapted to the external conditions offered by a motor vehicle engine, the latter are generally protected by means of a housing assembly housed in a dedicated compartment within the powertrain.
- a housing assembly housed in a dedicated compartment within the powertrain.
- Such a box generally comprises a rigid body on which a cover is superimposed to isolate the electrical components located in its interior space.
- the invention aims to remedy all or part of the drawbacks of the state of the art by proposing in particular a solution making it possible to reduce the amplitudes of deformation and to reduce the quantity of kinetic energy transmitted to a housing assembly of a power electronics device of an electric powertrain of a motor vehicle without adding critical mass and by proposing a reduced bulk.
- a housing assembly for housing a power electronic device, for example an inverter of an electric powertrain of a motor vehicle, the housing assembly comprising: a rigid body configured to contain the power electronics device; a cover configured to close an opening of the housing assembly body; the housing assembly being characterized by comprising a kinetic energy dissipation device forming a mechanical connection between the body and the cover, the kinetic energy dissipation device being configured to dampen, by dissipating kinetic energy said cover, a vibratory movement of the cover relative to the body in response to a forced excitation.
- such a damping means reduces the amplitudes of deformation of the cover of the housing and dissipates the kinetic energy transmitted by the vibratory movements, this by limiting the mass, that is to say without adding additional mass comparable to the solutions of the prior art, and while offering greater compactness.
- the damping means also performs its function of dissipating kinetic energy regardless of the frequency range of the excitations forced by elements external to the casing assembly during their operation.
- the cover extends along a reference plane.
- the kinetic energy dissipation device is configured to dissipate the kinetic energy of the cover by friction.
- the kinetic energy dissipation device preferably comprises a first element carrying at least a first friction surface and a second element carrying at least a second friction surface, the first and second elements defining together a surface connection along a contact surface between the first and the second friction surface, to dissipate the kinetic energy of the lid.
- one of the elements from among the first and the second element is integral with the lid, preferably consisting of at least part of the lid, the other of said elements being integral with the body of the assembly housing.
- the joining of the first and second elements can be done by fixing means, for example glue.
- one of the elements among the first and the second element comprises a housing, the other of said elements comprising a friction finger to cooperate with the housing.
- the friction finger can comprise a symmetry of revolution, for example by having a globally cylindrical shape and the housing has a corresponding complementary hollow shape.
- one of the elements among the first and the second element comprises an elastic tab configured to rub against the other of said elements.
- the first and second friction surfaces of the kinetic energy dissipation device are located at least at the level of a center of mass of the cover. 11 is an area where a vibration antinode will most easily form during a natural vibration mode, and therefore the dissipation of kinetic energy from said lid will be the most effective.
- the lid has a reference geometric shape, the kinetic energy dissipation device being located at least at the level of the center of the lid.
- reference geometric shape is understood to mean any geometric shape which has at least one axis of symmetry, and the manufacture of which is simple by conventional methods, for example by removal of material, deformation, sintering or molding.
- the first and second friction surfaces of the kinetic energy dissipation device are located at least at the level of an antinode of one of the vibration modes of the cover.
- a sealed bellows delimiting a cavity sealingly surrounding at least the first and second friction surfaces of the first and second elements, so as to isolate said first and second friction surfaces from the electronic power device . Any residue resulting from the abrasion of the first and second friction surfaces between them is therefore isolated from the inside of the case, thus avoiding any form of pollution.
- the kinetic energy dissipation device comprises at least one prestressing means configured to exert a constraint on one of the elements from among the first and the second element against the other of said elements.
- the kinetic energy dissipation device is configured to thermally dissipate the kinetic energy of the cover, the kinetic energy dissipation device preferably comprising a first element, a second element, and a compressible fluid interposed between the first and second elements.
- one of the elements among the first and the second element is for example a piston and the other of said elements is for example a cylinder.
- Such an embodiment can be alternative or complementary to a kinetic energy dissipation device configured to dissipate the kinetic energy of the cover by friction.
- the contact surface of the friction between the first and the second element is generally perpendicular to the reference plane in a position of equilibrium.
- the contact surface of the friction between the first and the second element is generally parallel to the reference plane in an equilibrium position.
- the invention also relates to a vehicle driven at least partially by electrical energy stored in at least one battery pack, the vehicle comprising a housing assembly as defined above.
- the vehicle is driven exclusively by electrical energy stored in the battery pack.
- FIG. 1 a simplified schematic sectional view of a housing assembly for housing a power electronics device according to one embodiment of the invention
- FIG. 2 a schematic view of a detail of a zone ZI of figure 1;
- FIG. 3 a simplified schematic sectional view of a housing assembly for housing a power electronics device according to an alternative embodiment of the invention
- FIG. 4 a simplified schematic sectional view of a housing assembly for housing a power electronics device according to another embodiment of the invention
- FIG. 5 a simplified schematic sectional view of a housing assembly for housing a power electronics device according to an alternative embodiment of the invention
- FIG.6 a simplified top view of the housing assembly according to Figure 5;
- FIG.7A a schematic view of a cover when it is subjected to a vibratory movement relative to the body in response to a forced excitation, when the cover vibrates at a natural frequency of the fundamental mode;
- FIG.7B a schematic view of a lid when it is subjected to a vibratory movement relative to the body in response to a forced excitation, when the lid vibrates at a natural frequency of a harmonic mode, with two vibrating bellies;
- FIG.7C a schematic view of a lid when it is subjected to a vibratory movement relative to the body in response to a forced excitation, when the lid vibrates at a natural frequency of a harmonic mode, with three vibration bellies.
- FIG. 1 With reference to Figures 1 ([Fig. 1]) to 6 ([Fig. 6]) are illustrated views of a housing assembly 1 configured here to house a power electronics device such as an inverter of an electric powertrain. In order to make the figures more readable, the entire powertrain is not shown in the figures.
- the housing assembly 1 has a generally parallelepipedal shape, it being understood that it may have any other geometric shape.
- the casing assembly 1 can house a power electronics device 2, for example an inverter of an electric powertrain of a motor vehicle.
- the housing 1 comprises a body 10 defining a housing adapted to receive the electrical device 2 in a given direction, here vertically with respect to the figures.
- the body 10 is rigid and thus configured to contain the power electronics device 2.
- the body 10 defines in addition to the housing, a passage opening for receiving the power electronics device 2 towards the housing.
- the housing 10 also includes a cover 20 retained by a flange of the body 10.
- the cover 20 extends along a reference plane P and is configured to close the passage opening of the body 10 of the housing assembly 1. Given the nature of the power electronics device 2 and to preserve it from any residual dust, the cover 20 preferably closes the housing, with the casing, in a sealed manner.
- the housing assembly 1 comprises a device 30 for dissipating kinetic energy forming a mechanical connection 31 between the body 10 and the cover 20.
- the device 30 for dissipating kinetic energy is configured to dampen a vibratory movement of the cover relative to the body 10, when said cover is stressed in response to a forced excitation.
- the damping of the vibratory movement is achieved by dissipation of kinetic energy from said cover 20, thus reducing its amplitude.
- the components of the inverter constituting here the power electronics device 2 are protected in the housing assembly 1 attached to other components. All vibrations related to the gears, electromagnetic forces and operation of the inverter are transmitted to the housing 1 of the inverter 2.
- the cover 20 of the housing 1 of the inverter 2 has a non-negligible surface and therefore reacts like a top speaker to diffuse noise.
- FIGS 1 and 2 illustrate a first embodiment of the invention in which the device 30 for dissipating kinetic energy is configured to dissipate the kinetic energy of the cover 20 by friction, preferably by dry friction.
- the device 30 for dissipating kinetic energy comprises: a first element 31, integral with the cover 20 and carrying at least a first friction surface 311; and a second element 32, secured to the body 10 of the housing assembly 1, carrying at least one second friction surface 321.
- the first and second elements 31, 32 together define the mechanical connection 31 between the body 10 and the cover 20 and more particularly define a surface contact connection along at least one contact surface S between the first 311 and the second 321 surfaces friction, to dissipate the kinetic energy of the cover 20.
- the first element 31 integral with the cover 20 forms a cylindrical finger with an axis perpendicular to the reference plane P and whose outer radial surface defines the first friction surface 311.
- This cylindrical friction finger 31 , 34 is configured to cooperate in a housing 33 of the second element 32, integral with the body 10.
- This housing 33 delimits a hollow space of complementary shape to the friction finger 34, namely also cylindrical with an axis coaxial with the axis of the finger friction 34 and whose radial wall facing the interior of the housing 33 carries the second friction surface 321.
- the cooperation of the friction finger 34 in the housing 33 is adjusted so that the friction is high enough to dampen the vibrations, but weak enough to allow relative movement between the first and the second friction surface and to avoid locking by shrinking.
- the mechanical connection thus formed here is a sliding connection with a reference axis orthogonal to the reference plane P, and whose surface of contact S between the first 311 and the second 321 friction surfaces define a cylindrical surface coaxial with the reference axis.
- the friction finger 34 is integral with the cover and may consist of an added piece, for example clipped, glued or welded to the cover.
- friction finger 34 is constituted at least in part by the cover itself from which extends, for example, a perpendicular extension projecting inwards and formed in one piece with the cover 20 and carrying an insert formed from a predetermined friction material carrying the first friction surface 311.
- the housing 33 is for its part secured to the body 10 of the housing assembly 1. 11 can be directly secured, that is to say fixed to an inner wall of the body 10 itself, or else indirectly, by being integral with an element itself integral with the body 10. This element may for example be the electronic device 2 itself.
- This housing 33 comprises at least a portion of a predetermined friction material.
- the housing 33 is here integral with a bottom wall of the housing 1 and projecting towards the inside of the housing 1.
- the housing 33 could also be integral with a side wall of the housing 1 depending on the desired location at the lid level 20.
- this mechanical connection can participate functionally in the closure of the passage opening of the housing 1 by the cover 20.
- a suitable arrangement or distribution of one or more devices 30 for dissipating kinetic energy , and in particular the mechanical connection 31 associated between the body 10 and the cover 20, can provide a keying function.
- a distal end of the housing 33 may locally have a widened shape, for example of frustoconical shape to facilitate the centering of the friction finger 34 with the corresponding complementary housing 33.
- the housing can be associated with the cover and the finger can be associated with the body of the case.
- Figure 3 illustrates a second embodiment which essentially differs from the first embodiment in that it comprises a bellows 40 delimiting a cavity 41 sealingly surrounding at least the first and second friction surfaces 311, 321 of the first and second elements 31, 32.
- a bellows 40 delimiting a cavity 41 sealingly surrounding at least the first and second friction surfaces 311, 321 of the first and second elements 31, 32.
- the bellows is configured so that in the closed position of the cover 20, the bellows 40 is in a state of stress, the latter being compressed between the cover 20 and a wall of the housing 1. With a bellows coming into stress against the cover, a good positioning of the bellows is guaranteed when closing the case, and at the same time the method of manufacturing the case element 1 is facilitated.
- Such a bellows 40 provides a function of protecting the interior environment of the housing 1 against residues resulting from the abrasion of the friction materials during friction between the first 311 and the second 321 friction surfaces against each other. the other (to dissipate the kinetic energy of the cover 20).
- Figure 4 illustrates a third embodiment of the invention in which the device 30 for dissipating kinetic energy is also configured to dissipate the kinetic energy of the cover 20 by friction.
- the kinetic energy dissipation device 30 is still located between the body 10 and the cover 20 and inside the housing 1, in particular the housing of the body 10 adapted to receive the electrical device 2.
- This third embodiment essentially differs from the first and second embodiment in that the first element 31 here comprises an elastic tab 35 prestressed between a wall of the housing 10 and the cover 20, the elastic tab 35 being configured to rub against the second element 32, secured to the cover.
- the second element 32 can be an added part made of a specific friction material, or else can be directly made up of a part of the surface of the cover 20, bearing the second friction surface 321 against which a portion of the distal end rubs. of the elastic tab 35 carrying the first friction surface 311.
- a proximal end portion, opposite the distal end portion, is itself fixed to an interior wall of the housing 1.
- the elastic tab 35 is metallic, so that it is made of at least one metal.
- the proximal end portion is placed so as to be locally parallel to the reference axis orthogonal to the reference plane P of the lid 20 while the distal end portion of the elastic tab 35 has a flattened shape in surface contact connection along a contact surface parallel to the reference plane P, between the first and the second friction surface.
- a body of the elastic tab 35 between its proximal and distal end portions is therefore bent or bent, this bending ensuring the prestressing of the elastic tab 35 between said first and second friction surfaces.
- an axial distance between the surface contact connection where the friction dissipating the kinetic energy of the lid occurs, and the proximal end portion, relative to the length of the lug 35 taken between its two proximal end portions and distal therefore makes it possible to predetermine the prestress applied between said first and second friction surfaces.
- an axial distance between the surface contact connection and the proximal end portion will be chosen that is less than or equal to half the length of the lug 35 taken between its two proximal and distal end portions.
- Figures 5 and 6 illustrate a fourth embodiment which essentially differs from the third embodiment in that the device 30 of Dissipation of kinetic energy is located between the body 10 and the cover 20, but outside the housing of the body 10 adapted to receive the electrical device 2.
- the proximal end portion of the elastic tab 35 is offset from an outer wall of the housing 1 by means of a support and the distal end wall of the elastic tab 35 still carries the friction surface 311 which this time comes into rubbing contact against the outer surface of the cover 20, carrying the second first friction surface 321.
- Such an embodiment although increasing the size of the housing assembly 1, has the particular advantage of being able to refrain from a means of dedicated protection of the interior environment of the housing 1 against residues resulting from the abrasion of friction materials.
- the bellows 40 is not the only possible means of protection.
- Other means of protection such as the use of a magnet intended to recover filings resulting from the abrasion of friction materials when these are metal-based.
- the housing assembly 1 may comprise a plurality of kinetic energy dissipation devices 30, distributed in a predetermined manner along the surface of the cover.
- the device 30 for dissipating kinetic energy is located at least at the level of a center of mass of the cover. If the cover 20 has a globally rectangular shape in the reference plane, the kinetic energy dissipation device 30 is then located at the center of this rectangle. This makes it possible to place the device for dissipating kinetic energy by friction at the level of the maximum displacement of the cover 20 due to the vibrations in its first natural mode, namely when the cover vibrates at a natural frequency of the fundamental mode.
- kinetic energy dissipation devices 30 can be arranged at the level of antinodes of vibrations to cover modes of resonances adapted to the use, for example adapted to the frequency of the vibrations undergone by the housing assembly.
- the kinetic energy dissipating devices 30 are spaced apart from each other, and spaced from the rim of the body 10 retaining the cover 20 by a predetermined space.
- kinetic energy dissipation devices 30 will be chosen positioned, for a predetermined mode of vibration, in each of the ventral zones delimited between the associated belly and half the distance separating said belly from the vibration node.
- Tests or simulations may make it possible to determine the positions of the antinodes of vibrations for given vibration frequency ranges and thus make it possible to determine the precise position of the kinetic energy dissipation devices 30 for a shape of cover 20 and a range given frequencies.
- FIGs 7A, 7B and 7C illustrate schematic views of a cover 20 when the latter is subjected to a vibratory movement relative to the body in response to a forced excitation, when the cover 20 vibrates at a natural frequency either in a fundamental mode with one antinode 23 of vibration (see [Fig.7A]J, or in a harmonic mode with two antinodes 23 of vibration (see [Fig.7B]J, or in a harmonic mode with three antinodes 23 of vibration (see [Fig.7C]J.
- a device 30 for dissipating kinetic energy may be placed at the level of each of the bellies, or more generally in each of the ventral zones of the associated antinodes, for a predetermined fundamental or harmonic mode, which will be most implemented when using the vehicle, for example.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Casings For Electric Apparatus (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2113762A FR3131176B1 (fr) | 2021-12-17 | 2021-12-17 | Ensemble boîtier pour loger un dispositif électronique de puissance |
| PCT/EP2022/086184 WO2023111193A1 (fr) | 2021-12-17 | 2022-12-15 | Ensemble boitier pour loger un dispositif electronique de puissance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4449832A1 true EP4449832A1 (fr) | 2024-10-23 |
Family
ID=82100869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22835434.6A Pending EP4449832A1 (fr) | 2021-12-17 | 2022-12-15 | Ensemble boitier pour loger un dispositif electronique de puissance |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4449832A1 (fr) |
| CN (1) | CN118511662A (fr) |
| FR (1) | FR3131176B1 (fr) |
| WO (1) | WO2023111193A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025180852A1 (fr) * | 2024-02-27 | 2025-09-04 | Valeo Eautomotive Germany Gmbh | Élément de support pour un module |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI126150B (fi) * | 2015-02-26 | 2016-07-15 | Vacon Oy | Järjestely tehoelektroniikkalaitteen, kuten taajuusmuuttajan, kiinnittämiseksi |
| JP7403230B2 (ja) * | 2019-04-01 | 2023-12-22 | 三菱重工サーマルシステムズ株式会社 | 電動圧縮機 |
| CN111787726A (zh) * | 2019-06-28 | 2020-10-16 | 西门子电动汽车动力总成系统(上海)有限公司 | 降低或消除噪声与振动问题的模块与装设其的电子设备 |
-
2021
- 2021-12-17 FR FR2113762A patent/FR3131176B1/fr active Active
-
2022
- 2022-12-15 CN CN202280086760.1A patent/CN118511662A/zh active Pending
- 2022-12-15 EP EP22835434.6A patent/EP4449832A1/fr active Pending
- 2022-12-15 WO PCT/EP2022/086184 patent/WO2023111193A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3131176A1 (fr) | 2023-06-23 |
| WO2023111193A1 (fr) | 2023-06-22 |
| CN118511662A (zh) | 2024-08-16 |
| FR3131176B1 (fr) | 2024-04-26 |
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