WO2024089145A1 - Refroidisseur pour refroidir un module électronique de puissance, et dispositif électronique de puissance comprenant un refroidisseur - Google Patents

Refroidisseur pour refroidir un module électronique de puissance, et dispositif électronique de puissance comprenant un refroidisseur Download PDF

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Publication number
WO2024089145A1
WO2024089145A1 PCT/EP2023/079873 EP2023079873W WO2024089145A1 WO 2024089145 A1 WO2024089145 A1 WO 2024089145A1 EP 2023079873 W EP2023079873 W EP 2023079873W WO 2024089145 A1 WO2024089145 A1 WO 2024089145A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooler
cooling channel
insert part
power electronics
projections
Prior art date
Application number
PCT/EP2023/079873
Other languages
German (de)
English (en)
Inventor
Alexander Sauermann
Johannes Fetzer
Carmelo Leone
Juan Martinez
Daniel ZIEGER
Original Assignee
Vitesco Technologies Germany Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vitesco Technologies Germany Gmbh filed Critical Vitesco Technologies Germany Gmbh
Publication of WO2024089145A1 publication Critical patent/WO2024089145A1/fr

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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
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change

Definitions

  • the present invention relates to a cooler for cooling a power electronics module, for example a (power) inverter or a (power) DCDC converter, and to a power electronics device, such as a (power) converter, in particular a (power) inverter or a (power) DCDC converter, especially for an electrically powered vehicle, with such a cooler.
  • a power electronics module for example a (power) inverter or a (power) DCDC converter
  • a power electronics device such as a (power) converter, in particular a (power) inverter or a (power) DCDC converter, especially for an electrically powered vehicle, with such a cooler.
  • Coolers for cooling power electronics modules e.g. a (power) inverter or a (power) DCDC converter
  • a (power) inverter or a (power) DCDC converter are well known and serve to dissipate waste heat from the modules during operation of the power electronics modules and thus protect the modules from overheating.
  • the object of the present application is therefore to provide a possibility with which the cooling performance or the cooling efficiency of a cooler can be increased.
  • a cooler for cooling a power electronics module, for example a (power) inverter or a (power) DCDC converter.
  • the cooler has a first cooler part and a second cooler part, which together circumferentially enclose a cooling channel for the passage of a coolant or a cooling liquid, such as cooling water, (except for inlet and outlet openings for letting the coolant in/out of the cooling channel).
  • the first cooler part has a bottom side facing the cooling channel, around which the coolant flows, and a top side facing away from the bottom side for thermal contacting of the power electronics module.
  • the first cooler part has projections, such as in the form of pin fins, which protrude into the cooling channel in order to increase the surface area of the underside.
  • the projections can be evenly distributed over the entire surface of the underside. Alternatively, the projections can be distributed unevenly or only in sections on the underside, depending on the layout of the (power) electrical components of the power electronics module on the top side of the first cooler part or depending on the possible heat distribution of the waste heat from these components in the first cooler part.
  • the cooler further comprises a cooler insert part which is inserted in the cooling channel and has an upper side facing the underside of the first cooler part.
  • the cooler insert part has recesses in the upper side into which the projections of the first cooler part at least partially protrude.
  • the first and second cooler parts essentially form the outer shell of the cooling channel and seal the cooling channel fluid-tight.
  • the first cooler part with the projections on the underside serves as a transfer medium for transferring waste heat from the power electronics module to the coolant flowing through the cooling channel and thus around the projections.
  • the cooler insert part is formed as a separate component (initially or before insertion into the cooling channel) that is physically separate from the first and second cooler parts and was inserted into the cooling channel and thus between the two cooler parts in a suitable, specially provided manufacturing step, and in particular in a suitable, specially provided joining step by means of a suitable joining connection, such as a material, form and/or force-fitting connection, with at least one of the two cooler parts. mechanically or physically, and especially thermally.
  • the cooler insert part can be made of a comparatively inexpensive material that does not necessarily have to have good thermal conductivity, as is the case with the material of the first cooler part.
  • the two cooler parts and/or the cooler insert part can be manufactured inexpensively with the corresponding structures mentioned above, for example in an extrusion process.
  • they can be shaped or dimensioned as desired according to technical requirements.
  • the cooler insert part can be shaped or dimensioned from an inexpensive, easily moldable material in such a way that the pressure loss and/or the flow rate of the coolant flowing through the cooling channel can be easily adjusted, which can also increase the cooling efficiency of the cooler.
  • the projections and the recesses can be adapted to each other in shape depending on requirements. Their cross-section can be adjusted so that the projections in the recessed areas are not washed under or the cooling structure of the cooler formed by the projections is not flowing under, which could lead to a deterioration in the cooling efficiency.
  • the pressure loss and/or the flow rate of the coolant flowing through the cooling channel can be adjusted by changing the shape and dimensions of the cooler insert part.
  • the shape and dimensions of the outer circumference of the two cooler parts and thus of the cooler can thus be kept unchanged, which in turn is advantageous for mass production of the two cooler parts and thus cost-effective production of the cooler.
  • This provides a way to increase the cooling performance and cooling efficiency of a cooler.
  • the cooler can be used to cool power electronic modules, but also to cool other technical devices where a specific adjustments to the flow rate and pressure loss of the coolant must be made without changing the radiator design or the external design of the radiator.
  • the cooler insert part can be removed from the cooling channel without causing any damage or can be replaced in the cooling channel.
  • the cooler insert part is attached to the first and/or second cooler part via a non-destructively separable joint, such as a non-destructively separable material, form-fitting and/or force-fitting connection.
  • the first cooler part consists of a metal or a metal alloy or aluminum or an aluminum alloy.
  • the cooler insert part consists, for example, of a (low-cost) plastic or a comparable low-cost material.
  • the first cooler part and/or the cooler insert part are manufactured using a pressing process.
  • the second cooler part can be made of a metal or a metal alloy or aluminum or an aluminum alloy like the first cooler part, or also of a plastic like the cooler insert part.
  • the recesses on the radiator insert part do not penetrate the radiator insert part.
  • the recesses are formed as blind holes.
  • the top of the cooler insert part is uneven, even without taking into account the local unevenness caused by the respective depressions, so that the surface area of the channel cross-section of the cooling channel varies in its extension direction or flow direction (main flow direction) of the coolant and/or also transversely to the extension direction or transversely to the flow direction.
  • the cooling channel has a channel cross-section that is inhomogeneous or changes in the flow direction of the coolant or transversely to the flow direction.
  • the top of the cooler insert part has, for example, at least one elevation that protrudes in the direction of the underside of the first cooler part and thus narrows the cooling channel.
  • the top of the cooler insert part has at least one surface section that includes at least one previously described depression for (at least partially) receiving a corresponding projection on the first cooler part and protrudes away from the rest of the top in the direction of the underside of the first cooler part and thus narrows the cooling channel in the area of this surface section.
  • the underside of the first cooler part have at least one (further) elevation which projects towards the top of the cooler insert part and thus narrows the cooling channel in the area of the elevation.
  • the flow of the coolant can be influenced and controlled in terms of pressure loss, flow velocity and direction in the cooling channel.
  • the cooler insert part has a wall that runs at least partially around the cooler insert part in the shape of a collar, which seals the cooling channel or the gaps in the cooling channel between the first cooler part and the cooler insert part in a fluid-tight manner.
  • the first cooler part can have a wall that runs at least partially around the first cooler part in the shape of a collar, which seals the cooling channel or the gaps in the cooling channel between the first cooler part and the cooler insert part in a fluid-tight manner.
  • the cooler insert part has at least one recess penetrating the cooler insert part, which forms an inlet or outlet for the coolant into or out of the cooling channel or into or out of intermediate spaces in the cooling channel between the first cooler part and the cooler insert part.
  • the first projections are pin- or rib-shaped, e.g. in the form of a pin-fin structure.
  • the first cooler part has second projections on the underside, which extend at least to the top of the cooler insert part and are designed to interrupt or direct or redirect the flow of the coolant.
  • the cooler insert part can have further second projections on the top, which extend at least to the underside of the first cooler part and are designed to interrupt or direct or redirect the flow of the coolant.
  • the second projections can be used to divide the cooling channel into sections that are aligned one behind the other in the flow direction of the cooling medium and together form a U-shaped or meandering course of the cooling channel.
  • the second projections can therefore be used to additionally influence and control the flow of the coolant in terms of pressure loss, flow speed and direction in the cooling channel.
  • the second projections are formed in the shape of ribs or walls.
  • At least one second projection is formed integrally with at least one first projection.
  • At least one second projection is arranged between two adjacent first projections and is formed integrally with these two adjacent first projections.
  • the second projection forms a wall of the cooling channel with the two first projections for interrupting or (re)directing the flow of the coolant.
  • a power electronics device such as a (power) converter, in particular a (power) inverter or a (power) DCDC converter, especially for an electrically powered vehicle, is provided.
  • the power electronics device has at least one power electronics module and at least one cooler as described above.
  • the power electronics module is arranged on the top of the first cooler part of the cooler and is thermally contacted with the first cooler part.
  • the power electronics module can be electrically insulated from the first cooler part via an electrical insulation layer that is arranged between the power electronics module and the first cooler part. If the first cooler part is electrically connected to the electrical ground of the power electronics device or forms the electrical ground itself, the power module can be electrically connected directly to the first cooler part via its ground connection, which is formed, for example, on an underside of the power module facing the first cooler part.
  • Figures 2A, 2B, 2C, 2D and 2E each show a schematic bird's eye view of a cooler insert part of a cooler according to an exemplary embodiment of the invention.
  • Figure 1 shows a schematic cross-sectional view of a portion of a power electronics device LV with a cooler KL according to an exemplary embodiment of the invention.
  • the power electronics device LV is formed as a power inverter of an electrically powered vehicle and has a power electronics module LM (shown schematically in the figure with a rectangle), which forms a switchable bridge circuit of the power inverter, and a cooler KL for cooling the power electronics module LM.
  • a power electronics module LM shown schematically in the figure with a rectangle
  • the cooler KL has a first cooler part KT1 and a second cooler part KT2 made of aluminum or an aluminum alloy, which together circumferentially enclose and seal fluid-tight a cooling channel KK for the passage of a coolant, such as cooling water.
  • a coolant such as cooling water.
  • the first cooler part KT1 has a bottom side US1 facing the cooling channel KK, over which the coolant flows or around, and a top side OS1 facing away from the bottom side US1, on which the power electronics module LM is arranged and is in thermal contact with the first cooler part KT1.
  • the first cooler part KT1 On the underside US1, the first cooler part KT1 has first projections VS1 for enlarging the surface of the underside US1 and thus for enlarging the contact area of the first cooler part KT1 with the coolant, which are pin-shaped and protrude into the cooling channel KK.
  • the shape and size of the cross-section of the first projections VS1 can be selected almost arbitrarily depending on the cooling performance requirements.
  • the projections can have a circular, elliptical or caterpillar-shaped cross-sectional area
  • the shape and/or the size of the cross section of the first projections VS1 can vary depending on their position in the cooling channel KK.
  • the second cooler part KT2 has an inlet opening EL and an outlet opening at the edge for passing the coolant into the cooling channel KK or out of the cooling channel KK.
  • the cooler KL further comprises a cooler insert part KE made of a plastic, which is inserted into the cooling channel KK as an insert part that is separate from the two cooler parts KT1, KT2 and can be removed from the cooling channel KK without causing any damage, and is mechanically connected to the first and/or the second cooler part KT1, KT2 via a form-fitting, material-fitting or force-fitting joint connection that can be separated without causing any damage, such as a snap connection.
  • a cooler insert part KE made of a plastic, which is inserted into the cooling channel KK as an insert part that is separate from the two cooler parts KT1, KT2 and can be removed from the cooling channel KK without causing any damage, and is mechanically connected to the first and/or the second cooler part KT1, KT2 via a form-fitting, material-fitting or force-fitting joint connection that can be separated without causing any damage, such as a snap connection.
  • the cooler insert part KE has an upper side OS2 which faces the lower side US1 of the first cooler part KT1 and has recesses VT in the form of blind holes into which the aforementioned first projections VS1 at least partially protrude.
  • the shape and/or the size of the cross section of the respective depressions VT can be adapted to the shape or size of the respective corresponding first projections VS1.
  • the depressions VT are adapted in shape, size, especially depth, to the respective corresponding first projections VS1 in such a way that no cavities form between the respective first projections VS1 on the one hand and the respective corresponding depressions VT on the other hand, which could allow the coolant to flow under the corresponding first projections VS1.
  • the first cooler part KT1 has second projections VS2 on the underside US1, which are formed in the form of ribs or walls and extend to the top side OS2 of the cooler insert part KE.
  • the cooler insert part KE can have rib- or wall-shaped projections that extend to the underside US1 of the first cooler part KT1.
  • These second projections form channel partition walls of the cooling channel KK, whereby the cooling channel is divided into several channel sections that lie one behind the other in the flow direction SR of the coolant and together form, for example, a U-shaped course of the cooling channel with a forward and a return flow or a meandering course of the cooling channel.
  • These second projections VS2 serve to direct or redirect the flow of the coolant according to the cooling requirement and thus increase the cooling efficiency.
  • top side OS2 of the cooler insert part KE is uneven and thus has elevations EH in places (see Figures 2B, 2C, 2D and 2E) that protrude towards the bottom side US1 of the first cooler part KT1 and thus narrow the cooling channel KK in the area of the elevations EH.
  • elevations EH serve to narrow the cooling channel KK in places according to the cooling requirement, whereby the pressure loss and the flow rate of the coolant flowing through the cooling channel can be adjusted in corresponding sections of the cooling channel KK.
  • the cooler insert part KE has a recess AS which forms an inlet EL or an outlet of the cooling channel KK for the inlet or outlet of the coolant into or from the cooling channel KK.
  • Figures 2A, 2B, 2C, 2D and 2E each show, in a schematic bird's eye view, a cooler insert part KE of a cooler KL according to an exemplary embodiment of the invention.
  • Figure 2A shows a schematic bird's eye view of a cooler insert part KE of a cooler KL according to an exemplary embodiment of the invention.
  • the cooler insert part KE is manufactured as a separate component from a plastic, for example by injection molding.
  • the cooler insert part KE has a base section BA, the top of which forms the previously described top side OS2 of the cooler insert part KE.
  • the cooler insert part KE has recesses VT in the form of blind holes, which are arranged distributed largely over the entire surface.
  • the cooler insert part KE also has a wall WD or a wall-shaped side section which runs almost completely around the base section BA and thus the cooler insert part KE in a collar-like manner.
  • the wall WD and the base section BA enclose a cavity HR which forms the cooling channel KK of the cooler KL described above.
  • the cooler insert part KE has a recess AS in one corner area, whereby a corner piece is missing in the base section BA and the transformation WD is interrupted in this area.
  • This recess AS forms an inlet EL or an outlet of the cooling channel KK for the inlet or outlet of the coolant into or from the cavity HR or cooling channel KK.
  • Figure 2B shows, in a further schematic bird's eye view, a cooler insert part KE of a cooler KL according to a further exemplary embodiment of the invention.
  • the cooler insert part KE shown in Figure 2B differs from the cooler insert part of Figure 2A only in that the recesses VT on the upper side of the base section BA are not distributed over the entire surface of the upper side, but are only formed in a limited area directly next to the recess AS.
  • Figure 2C shows, in a further schematic bird's eye view, a cooler insert part KE of a cooler KL according to a further exemplary embodiment of the invention.
  • the cooler insert part KE shown in Figure 2C differs from the cooler insert part of Figure 2A only in that its wall WD is only formed on two opposite sides of the base section BA and thus encloses the cavity or the cooling channel only on two sides.
  • Figure 2D shows, in a further schematic bird's eye view, a cooler insert part KE of a cooler KL according to a further exemplary embodiment of the invention.
  • the cooler insert part KE shown in Figure 2D differs from the cooler insert part in Figure 2A only in that its base section BA has elevations EH that protrude from the rest of the top side of the base section BA in the direction of the cavity HR and thus into the cooling channel. These elevations EH serve to narrow the cooling channel at appropriate points and thus adjust the pressure loss or the flow rate of the coolant flowing through the cooling channel.
  • Figure 2E shows a further schematic bird's eye view of a cooler insert part KE of a cooler KL according to a further exemplary embodiment of the invention.
  • the cooler insert part KE shown in Figure 2E differs from the cooler insert part from Figure 2C only in the additional elevations EH which the cooler insert part shown in Figure 2D has.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

L'invention concerne un refroidisseur (KL) destiné à coupler un module électronique de puissance (LM), comprenant : une première partie de refroidisseur (KT1) et une seconde partie de refroidisseur (KT2) qui entourent ensemble de manière circonférentielle un canal de refroidissement (KK) pour conduire un fluide de refroidissement, la première partie de refroidisseur (KT1) ayant une face inférieure (US1) faisant face au canal de refroidissement (KK) et une face supérieure (OS1) opposée à la face inférieure pour entrer en contact thermique avec le module électronique de puissance (LM), et la première partie de refroidisseur (KT1) ayant des premières saillies (VS1) sur la face inférieure (US1) afin d'augmenter la surface de la face inférieure (US1), lesdites saillies faisant saillie dans le canal de refroidissement (KK) ; et une partie d'insertion de refroidisseur (KE) qui est insérée dans le canal de refroidissement (KK) et a une face supérieure (OS2) faisant face à la face inférieure (US1) de la première partie de refroidisseur (KT1), ladite face supérieure ayant des dépressions (VT) dans lesquelles les premières saillies (VS1) font au moins partiellement saillie. L'invention concerne en outre un dispositif électronique de puissance (LV) comprenant ledit refroidisseur (KL).
PCT/EP2023/079873 2022-10-28 2023-10-26 Refroidisseur pour refroidir un module électronique de puissance, et dispositif électronique de puissance comprenant un refroidisseur WO2024089145A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022211443.4 2022-10-28
DE102022211443.4A DE102022211443A1 (de) 2022-10-28 2022-10-28 Kühler zur Kühlung eines Leistungselektronikmoduls, Leistungselektronikvorrichtung mit einem Kühler

Publications (1)

Publication Number Publication Date
WO2024089145A1 true WO2024089145A1 (fr) 2024-05-02

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PCT/EP2023/079873 WO2024089145A1 (fr) 2022-10-28 2023-10-26 Refroidisseur pour refroidir un module électronique de puissance, et dispositif électronique de puissance comprenant un refroidisseur

Country Status (2)

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DE (1) DE102022211443A1 (fr)
WO (1) WO2024089145A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110100585A1 (en) * 2009-11-04 2011-05-05 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Cooling apparatus
JP2012069892A (ja) * 2010-09-27 2012-04-05 Denso Corp 半導体冷却器
US20160129792A1 (en) * 2013-11-28 2016-05-12 Fuji Electric Co., Ltd. Method for manufacturing cooler for semiconductor-module, cooler for semiconductor-module, semiconductor-module and electrically-driven vehicle
US20210037678A1 (en) * 2019-07-30 2021-02-04 BRUSA Electronik AG Cooler and cooler body
DE102019219777A1 (de) * 2019-12-17 2021-06-17 Vitesco Technologies Germany Gmbh Kühler, leistungselektrische Vorrichtung mit einem Kühler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110100585A1 (en) * 2009-11-04 2011-05-05 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Cooling apparatus
JP2012069892A (ja) * 2010-09-27 2012-04-05 Denso Corp 半導体冷却器
US20160129792A1 (en) * 2013-11-28 2016-05-12 Fuji Electric Co., Ltd. Method for manufacturing cooler for semiconductor-module, cooler for semiconductor-module, semiconductor-module and electrically-driven vehicle
US20210037678A1 (en) * 2019-07-30 2021-02-04 BRUSA Electronik AG Cooler and cooler body
DE102019219777A1 (de) * 2019-12-17 2021-06-17 Vitesco Technologies Germany Gmbh Kühler, leistungselektrische Vorrichtung mit einem Kühler

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DE102022211443A1 (de) 2024-05-08

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