WO2023281947A1 - ケースおよび電気装置 - Google Patents

ケースおよび電気装置 Download PDF

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Publication number
WO2023281947A1
WO2023281947A1 PCT/JP2022/022472 JP2022022472W WO2023281947A1 WO 2023281947 A1 WO2023281947 A1 WO 2023281947A1 JP 2022022472 W JP2022022472 W JP 2022022472W WO 2023281947 A1 WO2023281947 A1 WO 2023281947A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow path
extension
cover
central wall
supply port
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
Application number
PCT/JP2022/022472
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
進一 三浦
海 森本
仁史 井村
玉東 孟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
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 Denso Corp filed Critical Denso Corp
Publication of WO2023281947A1 publication Critical patent/WO2023281947A1/ja
Priority to US18/402,083 priority Critical patent/US12520453B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
    • 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
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W40/00—Arrangements for thermal protection or thermal control
    • H10W40/40—Arrangements for thermal protection or thermal control involving heat exchange by flowing fluids
    • H10W40/47—Arrangements for thermal protection or thermal control involving heat exchange by flowing fluids by flowing liquids, e.g. forced water cooling
    • 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 disclosure described in this specification relates to cases and electrical devices.
  • Patent Document 1 discloses a case having a flow path through which a coolant flows.
  • the case has a main body with an open upper surface among the side surfaces forming the flow path, and a cover that covers the opening of the flow path.
  • a cover is joined to the main body so as to surround the flow path.
  • the cover may be deformed in the direction in which the main body and the cover are aligned in the width direction of the flow path due to the pressure applied from the refrigerant to the cover.
  • an object of the present disclosure is to provide a case and an electric device in which deformation of the cover in the width direction due to the pressure applied to the cover from the coolant is suppressed.
  • a case according to one aspect of the present disclosure is: A case in which a flow path for a coolant is formed, A supply port to which the coolant is supplied, a discharge port to which the coolant is discharged, and a lower surface and a top surface from the lower surface of the bottom to the upper surface so as to connect the supply port and the discharge port to define a part of the flow path.
  • a main body comprising a recess recessed in the direction in which the a cover that is joined to the lower surface so that the first main surface surrounds the flow path, thereby closing the recess and forming the flow path;
  • a portion of the cover that defines a portion of the flow channel is formed with an extension that is recessed from the second main surface on the back side of the first main surface toward the first main surface in the alignment direction and extends in the extension direction of the flow channel.
  • An end portion of the extension portion in the extension direction extends along the flow path and in the width direction orthogonal to the extension direction.
  • An electrical device includes: An electrical device comprising an electrical component and a case accommodating the electrical component in its internal space, wherein the case has a flow path for a coolant, the case is A supply port to which the coolant is supplied, a discharge port to which the coolant is discharged, and a lower surface and a top surface from the lower surface of the bottom to the upper surface so as to connect the supply port and the discharge port to define a part of the flow path.
  • a main body comprising a recess recessed in the direction in which the a cover that is joined to the lower surface so that the first main surface surrounds the flow path, thereby closing the recess and forming the flow path;
  • a portion of the cover that defines a portion of the flow channel is formed with an extension that is recessed from the second main surface on the back side of the first main surface toward the first main surface in the alignment direction and extends in the extension direction of the flow channel.
  • An end portion of the extension portion in the extension direction extends along the flow path and in the width direction orthogonal to the extension direction.
  • FIG. 2 is a cross-sectional view of the power conversion device taken along line II-II of FIG. 1;
  • FIG. 4 is a plan view of the main body viewed from the bottom side; It is a top view of the cover seen from the second main surface. It is a top view of the power converter seen from the bottom side.
  • FIG. 6 is a cross-sectional view of the power conversion device taken along line VI-VI of FIG. 5; It is the top view of the power converter seen from the bottom part side which expanded one part.
  • FIG. 8 is a cross-sectional view of the power converter along line VIII-VIII of FIG. 7; FIG.
  • FIG. 8 is a cross-sectional view of the power converter along line IX-IX in FIG. 7; It is a top view of a power converter explaining the relationship between the separation distance between edge parts, and the width of an extension part and a 2nd center part. It is a top view of the power converter seen from the bottom part side explaining 2nd Embodiment. It is a top view of the power converter seen from the bottom side explaining 3rd Embodiment. It is a top view of the power converter seen from the bottom part side explaining 4th Embodiment.
  • FIG. 10 is a plan view of the power converter seen from the bottom side for explaining the configuration group A;
  • a power converter 1 shown in FIG. 1 is included in a drive system.
  • Drive systems are installed in vehicles such as electric vehicles (EV), hybrid vehicles (HV), and fuel cell vehicles.
  • the drive system has an inverter device, a battery, and a motor in addition to the power conversion device 1 .
  • a drive system is a system that drives a motor to drive the drive wheels of a vehicle.
  • the battery is a DC voltage source composed of a rechargeable secondary battery.
  • Secondary batteries are, for example, lithium-ion batteries and nickel-metal hydride batteries.
  • the drive system has a high-voltage battery and a low-voltage battery as batteries.
  • the voltage of the high voltage battery is for example 100V and the voltage of the low voltage battery is for example 12V.
  • the high voltage battery is sometimes referred to as the first power supply and the low voltage battery is sometimes referred to as the second power supply.
  • the motor is a 3-phase alternating current rotating electric machine.
  • the motor has three phases, U-phase, V-phase, and W-phase.
  • the motor functions as an electric motor, which is a driving source of the vehicle.
  • the motor functions as a generator during regeneration.
  • the inverter device performs power conversion between the high-voltage battery and the motor.
  • the inverter device is capable of bidirectional power conversion.
  • the inverter device converts the DC power from the high-voltage battery into AC power and supplies the AC power to the motor. Further, the inverter device converts AC power generated by the motor into DC power and supplies the DC power to the high-voltage battery.
  • the inverter device has an inverter circuit and a capacitor.
  • the inverter circuit includes a plurality of semiconductor switches.
  • the capacitor is, for example, a smoothing capacitor, and smoothes the DC voltage supplied from the high voltage battery to the inverter circuit.
  • the power conversion device 1 is a converter device.
  • the power conversion device 1 and a converter unit 15, which will be described later, are sometimes referred to as a DCDC converter.
  • the power conversion device 1 is capable of bi-directional power conversion.
  • the power conversion device 1 converts a DC voltage into DC voltages of different voltages.
  • the power conversion device 1 performs power conversion between a high voltage battery and a low voltage battery.
  • the power conversion device 1 steps down the DC voltage from the high voltage battery and supplies it to the low voltage battery.
  • the power conversion device 1 performs power conversion between the inverter device and the low-voltage battery.
  • the power conversion device 1 steps down the DC voltage from the inverter device and supplies it to the low voltage battery.
  • the power converter 1 has a converter circuit, a capacitor and a reactor.
  • the converter circuit includes a plurality of semiconductor switches.
  • the capacitor for example a filter capacitor, filters out power supply noise from the high voltage battery.
  • the reactor boosts the voltage from the high-voltage battery with the switching operation of the semiconductor switch in the converter circuit, for example.
  • the power conversion device 1 also has a control device that controls the converter circuit.
  • the control device is configured by an ECU or the like. ECU is an abbreviation for Electronic Control Unit.
  • the control device may be included in the inverter device, or a common control device may be provided for the power conversion device 1 and the inverter device.
  • FIG. 1 the structure of the power converter 1 will be described with reference to FIGS. 1 and 2.
  • FIG. 1 the structure of the power converter 1 will be described with reference to FIGS. 1 and 2.
  • the power converter 1 has a converter unit 15, a capacitor unit 16, a reactor unit 17, and a case 10 that houses them.
  • the case 10 has a main body 20 housing the converter unit 15 to the reactor unit 17 and a cover 50 attached to the main body 20 . Details of the main body 20 and the cover 50 will be described later.
  • the converter unit 15, the capacitor unit 16, and the reactor unit 17 correspond to electrical parts.
  • the power conversion device 1 corresponds to an electric device.
  • Case 10 is sometimes referred to as a converter case.
  • FIG. 2 shows the side surface of the converter unit 15 and the reactor unit 17, not the cross section.
  • the converter unit 15 has a switching element that constitutes a semiconductor switch of the converter circuit and a coating resin that protects the switching element.
  • the capacitor unit 16 has a capacitor element that constitutes a filter capacitor and a capacitor case that protects the capacitor element.
  • the reactor unit 17 has a reactor element that constitutes a reactor and a reactor case that protects the reactor element.
  • the main body 20 has a box shape.
  • Body 20 has a bottom portion 23 and side portions 24 .
  • the bottom portion 23 has a flat shape with a thin thickness in the z direction.
  • the bottom portion 23 has an upper surface 23a arranged in the z direction and a lower surface 23b on the back side.
  • a side portion 24 is connected to the upper surface 23a.
  • the side portion 24 is annularly erected in a manner away from the upper surface 23a.
  • the side portion 24 has a first side portion 24a and a third side portion 24c spaced apart in the x direction, and a second side portion 24b and a fourth side portion 24d spaced apart in the y direction.
  • the internal space 21 is defined by the first side portion 24a to the fourth side portion 24d. Further, the ends of the first to fourth side portions 24a to 24d separated from the upper surface 23a form openings 22 that open in the z-direction.
  • the converter unit 15, the capacitor unit 16, and the reactor unit 17 are accommodated in the internal space 21, respectively.
  • the capacitor unit 16 and the reactor unit 17 are housed in the internal space 21 on the side of the first side portion 24a.
  • a capacitor unit 16 and a reactor unit 17 are spaced apart in the y direction and arranged side by side.
  • the capacitor unit 16 is housed on the side of the second side portion 24b.
  • the reactor unit 17 is housed on the side of the fourth side portion 24d.
  • the converter unit 15 is housed in the internal space 21 on the side of the third side portion 24c.
  • the converter unit 15 is arranged side by side with the reactor unit 17 spaced apart in the x direction.
  • the bottom portion 23 is formed with a recessed portion 30 recessed from the lower surface 23b toward the upper surface 23a.
  • the concave portion 30 defines a part of the flow channel 100 which will be described later.
  • the recessed portion 30 is a recess for allowing coolant to flow into the main body 20 .
  • the concave portion 30 has a substantially U shape when viewed from above in the z direction.
  • the concave portion 30 has a second inner surface 30b positioned on the side portion 24 side in the width direction of the flow channel 100, a first inner surface 30a facing the second inner surface 30b in the width direction, and a first inner surface 30b. It is partitioned by a connecting surface 30c that connects 30a and the second inner surface 30b.
  • the width direction is a direction along the channel 100 and orthogonal to the extension direction of the channel 100 .
  • the extension direction corresponds to the direction extending from the later-described supply port 111 toward the discharge port 131 on the first inner surface 30a and the second inner surface 30b.
  • the extension direction corresponds to the flow direction of the coolant.
  • the bottom portion 23 having the first inner surface 30a is hereinafter referred to as the central wall portion 35.
  • the bottom portion 23 having the second inner surface 30b is referred to as the outer peripheral wall portion 40.
  • the recess 30 is defined by a first inner surface 30a of the central wall portion 35, a second inner surface 30b of the outer peripheral wall portion 40, and a connecting surface 30c.
  • a partition wall 70 is formed on the bottom portion 23 so as to protrude away from the connecting surface 30c in the z direction.
  • the partition 70 will be explained later.
  • the cover 50 has a flat shape with a thin thickness in the z direction.
  • the cover 50 has a first main surface 50a arranged in the z-direction and a second main surface 50b on the back side thereof.
  • a cover 50 is provided on the lower surface 23b such that the first main surface 50a faces the connecting surface 30c.
  • the cover 50 is attached to the lower surface 23b of the central wall portion 35 and the lower surface 23b of the outer peripheral wall portion 40 so that the first main surface 50a faces the connecting surface 30c.
  • the cover 50 is mechanically connected to the lower surface 23b of the central wall portion 35 and the lower surface 23b of the outer peripheral wall portion 40 by friction stir welding.
  • the cover 50 is joined to the central wall portion 35 between the first joint portion 33a and the second joint portion 33b. Further, as shown in FIG. 5, the cover 50 is annularly joined to the outer peripheral wall portion 40 through the second joint portion 33b to the seventh joint portion 33g so as to surround the concave portion 30 in the z-direction. The cover 50 is joined to the second central wall portion 32 of the central wall portion 35 described later at the first joint portion 33a.
  • the flow path 100 is defined by the first main surface 50a, the first inner surface 30a, the connecting surface 30c, and the second inner surface 30b.
  • the flow path 100 has a substantially U shape when viewed from above in the z direction.
  • the cover 50 is formed with an extension 60 recessed from the second main surface 50b toward the first main surface 50a and extending in the direction in which the flow path 100 extends.
  • the extension part 60 is also called a bead. Details of the extension 60 will be described later.
  • ⁇ Flow path> A specific form of the channel 100 will be described below.
  • channel 100 has first channel 110, second channel 120, and third channel .
  • First channel 110 , second channel 120 , and third channel 130 are arranged in order in the extension direction of channel 100 .
  • the first channel 110 and the third channel 130 are spaced apart in the y direction.
  • the first flow path 110 extends along the x direction on the second side portion 24b side.
  • a supply port 111 is provided at one end of the first channel 110 on the side of the first side portion 24a.
  • the third flow path 130 extends along the x direction on the side of the fourth side portion 24d.
  • a discharge port 131 is provided at one end of the third channel 130 on the side of the first side portion 24a.
  • a second channel 120 is connected between the other end of the first channel 110 on the side away from the supply port 111 and the other end of the third channel 130 on the side away from the discharge port 131 .
  • the second flow path 120 extends from the supply port 111 toward the discharge port 131 by folding back.
  • the second flow path 120 has a substantially U shape when viewed from above in the z direction.
  • the extending direction of the channel 100 corresponds to the x direction in the first channel 110 and the third channel 130 .
  • the second channel 120 it corresponds to the circumferential direction around the second central wall portion 32. As shown in FIG.
  • a boundary line between the first channel 110 and the second channel 120 corresponds to the position where the channel 100 starts to bend.
  • a boundary line between the second flow path 120 and the third flow path 130 corresponds to the position where the flow path 100 bends.
  • the coolant is then supplied from the supply port 111 to the first channel 110 . After passing through the first channel 110 , the coolant is allowed to flow through the second channel 120 . After passing through the second channel 120 , the coolant is allowed to flow through the third channel 130 . The refrigerant that has passed through the third flow path 130 is discharged from the discharge port 131 .
  • first channel 110 is formed on the side of the second side portion 24b, and the third channel 130 is formed on the side of the fourth side portion 24d.
  • a first flow path 110 may be formed, and a third flow path 130 may be formed on the second side portion 24b side.
  • the central wall portion 35 described so far is provided between the first flow path 110 , the second flow path 120 and the third flow path 130 .
  • the central wall portion 35 includes the first central wall portion 31 between the first flow passage 110 and the third flow passage 130 and the second central wall portion 32 surrounded by the second flow passage 120 and the first central wall portion 31. have.
  • the second central wall portion 32 is surrounded by the first channel 110, the second channel 120 and the third channel 130, respectively. Further, as shown in FIGS. 1 and 5, the second central wall portion 32 has a substantially semicircular shape.
  • the partition wall 70 is formed on the bottom portion 23 so as to protrude away from the connecting surface 30c in the z-direction. As shown in FIGS. 3 and 5, the partition 70 has a first partition 71 and a second partition 72 .
  • the first partition 71 and the second partition 72 extend in the extension direction of the channel 100 . That is, the first partition wall 71 and the second partition wall 72 form a substantially U shape when viewed from above in the z direction.
  • the first partition 71 and the second partition 72 are spaced apart in the width direction.
  • the first partition 71 and the second partition 72 are arranged in order of the first partition 71 and the second partition 72 from the first inner surface 30a toward the second inner surface 30b.
  • the flow path 100 is divided into three by the central wall portion 35, the first partition wall 71, the second partition wall 72, and the outer peripheral wall portion .
  • the flow dividing path between the central wall portion 35 and the first partition wall 71 is referred to as a first flow dividing path 210 .
  • a branch path between the first partition 71 and the second partition 72 is indicated as a second branch path 220 .
  • a flow branch path between the second partition wall 72 and the outer peripheral wall portion 40 is indicated as a third flow branch path 230 .
  • the cover 50 is provided with the extended portion 60 recessed from the second main surface 50b toward the first main surface 50a and extending in the direction in which the flow path 100 extends. For this reason, the extension 60 is naturally connected to the main portion of the cover 50 by the ends 66 located at both ends in the width direction and the ends 66 located at both ends in the extension direction.
  • the main portion of the cover 50 is a portion of the cover 50 excluding the extended portion 60 .
  • the main portion of the cover 50 will be simply referred to as the cover 50 below.
  • the extension portion 60 may be thick in the extension direction.
  • the extension 60 may have a so-called rib shape.
  • the extension 60 has a first extension 61, a second extension 62 and a third extension 63 arranged in the width direction.
  • the first to third extension portions 61 to 63 are arranged in order from the first inner surface 30a toward the second inner surface 30b so as to be spaced apart in the width direction.
  • the extension portion 60 when describing the configuration common to the first extension portion 61 to the third extension portion 63, they will be appropriately referred to as the extension portion 60 without distinguishing between them.
  • the extension part 60 since the extension part 60 is curved, it is easily elastically deformed.
  • the first extension portion 61 is divided into a supply port side first extension portion 61a located on the supply port 111 side and a discharge port side first extension portion 61b located on the discharge port 131 side. .
  • the supply port side first extension 61a is provided in the first branch path 210 of the first flow path 110 and the first branch path 210 of the second flow path 120.
  • the outlet side first extension 61b is provided in the first branch path 210 of the third flow path 130 and the first branch path 210 of the second flow path 120 .
  • the portion of the supply port side first extension 61a provided in the second flow path 120 extends along the second central wall 32 in the circumferential direction around the z direction.
  • a portion of the outlet-side first extension portion 61b provided in the second flow path 120 extends along the second central wall portion 32 in the circumferential direction around the z-direction.
  • the center line of the second central wall portion 32 extends in the z direction.
  • the portion of the supply port side first extension portion 61 a provided in the second flow passage 120 and the portion of the discharge port side first extension portion 61 b provided in the second flow passage 120 are aligned around the center line of the second central wall portion 32 . extending in the direction
  • a first end portion 64 at the tip of a portion of the supply port side first extension portion 61a provided in the second flow path 120 extends in the width direction.
  • a second end portion 65 at the tip of the portion provided in the second flow path 120 of the outlet-side first extension portion 61b extends in the width direction.
  • first end 64 and the second end 65 face each other in the extension direction.
  • cover 50 is joined to the second central wall portion 32 at the first joint portion 33a.
  • a first joint 33a is located between the first end 64 and the second end 65 in the extension direction.
  • the first joint 33a is located within the projection area of the gap between the first end 64 and the second end 65 onto the second central wall 32. Note that the width direction is shown as the w direction in the drawings. In the drawings, "direction" is omitted.
  • the separation distance L1 between the first end portion 64 and the second end portion 65 of the outlet-side first extension portion 61b is smaller than the average width L2 of the first central wall portion 31 in the y direction. It's becoming Further, the separation distance L1 between the first end portion 64 and the second end portion 65 is smaller than the average width L3 of the first extension portion 61 in the width direction.
  • the average width L3 of each of the supply port side first extension portion 61a and the discharge port side first extension portion 61b is equal.
  • the average L3 of the width of one of the supply port side first extension portion 61a and the discharge port side first extension portion 61b is the average of the width of the other of the supply port side first extension portion 61a and the discharge port side first extension portion 61b. It may be smaller than L3. In this case, the separation distance L1 between the first end portion 64 and the second end portion 65 is smaller than the average L3 of the width of the smaller one of the first extension portion 61a on the supply port side and the first extension portion 61b on the discharge port side. may be
  • the second extension portion 62 is divided into a supply port side second extension portion 62a and a discharge port side second extension portion 62b.
  • a supply port side second extension portion 62 a is provided in the second branch path 220 of the first flow path 110 .
  • a second outlet-side extension portion 62 b is provided in the second branch path 220 of the third flow path 130 .
  • the third extension 63 is divided into a supply port side third extension 63a and a discharge port side third extension 63b.
  • the supply port side third extension 63a is provided in the third branch path 230 of the first flow path 110.
  • An outlet-side third extension 63 b is provided in the third branch path 230 of the third flow path 130 .
  • the process of manufacturing the power conversion device 1 includes a process of manufacturing the case 10 and a process of housing electrical components such as the converter unit 15 inside the case 10 .
  • the worker first manufactures the main body 20 and the cover 50.
  • body 20 is manufactured by casting.
  • a cover 50 is manufactured by pressing.
  • the cover 50 is provided on a lower mold (die) having a dent in the desired shape, and the upper mold (punch) that sinks into the dent is pressed against the first extensions 61 to 61 while applying pressure.
  • the third extensions 63 is molded.
  • the worker After manufacturing the main body 20 and the cover 50 , in the manufacturing process of the case 10 , the worker performs a temporary attaching step of temporarily attaching the cover 50 to the main body 20 .
  • the cover is attached so that the corresponding first extension portions 61 to third extension portions 61 to 63 enter respective portions that partition the first to third branch paths 210 to 230 as shown in FIG. 50 is temporarily attached to the lower surface 23b of the main body 20.
  • Friction stir welding is a method of pressing a tool rotating at high speed against the cover 50 and joining the cover 50 to the bottom portion 23 by frictional heat between the tool and the cover 50 .
  • friction stir welding is continuously performed along the periphery of the recess 30 .
  • the tool is first moved along the x-direction from the first joint 33a toward the second joint 33b. After that, the tool is moved clockwise by one stroke so as to pass through the third joint 33c, the fourth joint 33d, the fifth joint 33e, the sixth joint 33f, and the seventh joint 33g. In this way, the main body 20 and the cover 50 are joined together. Friction stir welding is sometimes referred to as FSW.
  • the converter unit 15 is housed on the side of the third side portion 24c so as to overlap the second flow path 120 in plan view in the z direction.
  • the reactor unit 17 is housed on the fourth side portion 24d side of the first side portion 24a so as to overlap the first flow channel 110 and the third flow channel 130 in plan view in the z direction.
  • the capacitor unit 16 is housed on the side of the second side portion 24b on the side of the first side portion 24a so as to overlap the outer peripheral wall portion 40 in plan view in the z direction.
  • the arrangement of electrical components in the internal space 21 is not limited to the configuration described above.
  • the arrangement may be such that the condenser unit 16 overlaps at least one of the first flow path 110 to the third flow path 130 in plan view in the z direction.
  • Refrigerant internal pressure As described above, coolant flows through the flow path 100 . Refrigerant is supplied to supply port 111 by an external pump. Therefore, pulsation may occur in the refrigerant as the pump is driven. Also, the refrigerant may linearly expand due to the heat generated by the electrical parts.
  • the internal pressure of the refrigerant flowing through the flow path 100 may increase.
  • the internal pressure is pressure applied in the normal direction from the refrigerant flowing in the flow path 100 toward the portion of the bottom portion 23 that partitions the flow path 100 and the cover 50 .
  • This internal pressure expands and deforms the cover 50 so as to separate it from the bottom 23 in the z direction.
  • the expansion deformation of the cover 50 due to the internal pressure is received from, for example, three directions, and the stress is the most excessive.
  • the cover 50 is provided with an extension portion 60 that is recessed from the second main surface 50b toward the first main surface 50a and that extends in the direction in which the flow path 100 extends. Since the extension 60 is curved, it is easily elastically deformed. The cover 50 is joined to the bottom 23 such that the extensions 60 enter corresponding diverted flow paths.
  • the first branch path 210 to the third branch path 230 are partitioned by two of the central wall portion 35, the first partition wall 71, the second partition wall 72, and the outer peripheral wall portion 40, which are arranged in the width direction. ing.
  • the cover 50 deforms in the z-direction so as to separate from the bottom 23, but at this time the extension 60 hits the wall that partitions itself.
  • the stress applied to the joining portion between the cover 50 and the bottom portion 23 is easily relieved.
  • concentration of stress on the first joint portion 33a between the cover 50 and the second central wall portion 32 is easily suppressed. Accordingly, deformation of the cover 50 in the z-direction so as to separate from the bottom portion 23 at the first joint portion 33a is easily suppressed.
  • the extended portion 60 is connected to the cover 50 by the end portion located at the end in the width direction and the end portion 66 located at the end in the extension direction.
  • the ends 66 positioned at the ends in the extension direction include, for example, the first end 64 and the second end 65 . It should be noted that when describing the configuration common to the first end portion 64 and the second end portion 65, the first end portion 64 and the second end portion 65 are appropriately referred to as the end portion 66 without distinction.
  • the end portions 66 in the extension direction may include a plurality of end portions 66 .
  • the end portion 66 of the extension portion 60 extends in the width direction. This makes it difficult for the cover 50 to deform in the width direction in the z direction. Therefore, when internal pressure is applied to the cover 50 from the refrigerant, deformation of the cover 50 in the width direction in the z direction is easily suppressed. Accordingly, concentration of stress on the first joint 33a between the cover 50 and the second central wall portion 32, for example, is easily suppressed. Deformation of the cover 50 in the z-direction away from the bottom 23 at the first joint 33a is easily suppressed.
  • the extension part 60 is divided as explained so far.
  • a first end portion 64 extending in the width direction is provided on one of the divided extension portions 60 .
  • a second end portion 65 extending in the width direction is provided on the other part of the extended portion 60 .
  • Each of the first end 64 and the second end 65 extends in the width direction.
  • the number of ends 66 increases because the extension 60 is divided. Therefore, when internal pressure is applied to the cover 50 from the refrigerant, deformation of the cover 50 in the width direction in the z direction is easily suppressed. Deformation of the cover 50 in the z-direction away from the bottom 23 at the first joint 33a is easily suppressed.
  • the portion of the supply port side first extension 61a provided in the second flow path 120 extends along the second central wall 32 in the circumferential direction.
  • the portion of the outlet-side first extension portion 61b provided in the second flow path 120 extends along the second central wall portion 32 in the circumferential direction.
  • a first end portion 64 and a second end portion 65 are provided in the second flow path 120 .
  • the first end 64 and the second end 65 face each other in the extending direction.
  • the first joint 33a is located between the first end 64 and the second end 65 in the extension direction.
  • the first joint 33 a is located within the projection area of the gap between the first end 64 and the second end 65 onto the second central wall 32 .
  • the cover 50 is positioned at the first joint portion 33a. It is easily deformed in the z direction so as to separate from the bottom 23 .
  • the cover 50 is easily deformed so as to separate from the bottom portion 23 in the z-direction at the first joint portion 33a.
  • the first extension portion 61 extends continuously in the circumferential direction around the first joint portion 33a, there is a concern that the dimensions of the cover 50 as a product may not fit within the tolerance due to shrinkage after press working.
  • the separation distance L1 between the first end portion 64 and the second end portion 65 is equal to the average width L2 of the first central wall portion 31 in the y direction and the width of the first extension portion 61 in the width direction. is smaller than the average L3 of the width of .
  • the range facing the supply port side first extension portion 61a and the discharge port side first extension portion 61b in width at the first joint portion 33a is widened. Deformation of the cover 50 in the z-direction away from the second central wall portion 32 is easily suppressed. Deformation in the z-direction so as to separate from the bottom portion 23 in the width direction at the first joint portion 33a is easily suppressed effectively.
  • the supply port side first extension portion 61 a and the discharge port side first extension portion 61 b are provided in the first branch path 210 of the second flow path 120 .
  • the supply port side second extension portion 62 a and the discharge port side second extension portion 62 b may be provided in the second branch path 220 of the second flow path 120 .
  • the supply port side third extension portion 63 a and the discharge port side third extension portion 63 b may be provided in the third branch path 230 of the second flow path 120 .
  • the portion of the supply port side second extension 62a provided in the second flow path 120 extends along the second central wall 32 in the circumferential direction.
  • a portion of the outlet-side second extension portion 62b provided in the second flow path 120 extends along the second central wall portion 32 in the circumferential direction.
  • the first end 64 and the second end 65 face each other in the extension direction.
  • a first joint 33a is located between the first end 64 and the second end 65 in the extension direction.
  • a portion of the supply port side third extension 63a provided in the second flow path 120 extends along the second central wall 32 in the circumferential direction.
  • a portion of the outlet-side third extension portion 63b provided in the second flow path 120 extends along the second central wall portion 32 in the circumferential direction.
  • the first end 64 and the second end 65 face each other in the extension direction.
  • a first joint 33a is located between the first end 64 and the second end 65 in the extension direction.
  • the number of ends 66 provided in the second flow path 120 is increased. Therefore, when internal pressure is applied to the cover 50 from the refrigerant, deformation of the cover 50 in the width direction in the z direction is easily suppressed. Deformation of the cover 50 in the z-direction away from the bottom portion 23 at the first joint 33a is easily suppressed efficiently.
  • first end portion 64 and the second end portion 65 do not have to face each other in the extending direction.
  • the first end portion 64 and the second end portion 65 do not have to face each other in the extending direction.
  • the extension 60 may have only the first extension 61 as shown in FIG. Further, the separation distance L1 between the supply port side first extension portion 61a and the discharge port side first extension portion 61b is equal to the average width L2 of the width of the first central wall portion 31 in the y direction and the width direction of the first extension portion 61. may be greater than the average L3 of the width of the . Also, although not shown, the extension 60 may have either the second extension 62 or the third extension 63 . The supply port side extension portion and the discharge port side extension portion may be shifted in the width direction.
  • the supply port side extension portion is a collective name of the supply port side first extension portion 61a to the supply port side third extension portion 63a.
  • the discharge port side extension portion is a collective name of the discharge port side first extension portion 61b to the discharge port side third extension portion 63b.
  • the first extension portion 61 includes a first supply port side extension portion 61a and a first discharge port side extension portion 61b, as well as a first supply port side extension portion 61a and a first discharge port side extension portion 61b. You may have the relay part 61c between 61b. The end portions 66 of the first extension portion 61 a to the relay portion 61 c on the supply port side may not be provided in the second flow path 120 . Even in this case, the cover 50 is less likely to deform in the width direction in the z direction.
  • two or more relay portions 61c may be provided. Conversely, only one of the supply port side first extension portion 61 a to the relay portion 61 c may be provided in the flow path 100 . According to this, deformation of the cover 50 in the direction of arrangement in the width direction is suppressed.
  • the flow path 100 does not have to be substantially U-shaped when viewed from above in the z direction.
  • the shape of the flow channel 100 is not limited to a substantially U shape.
  • the channel 100 may, for example, extend in one direction. It may be bent in the middle.
  • the case 10 and the power conversion device 1 may be mounted on the vehicle in any direction.
  • the power conversion device 1 may be mounted on the vehicle in such a direction that the upper surface 23a is positioned below the lower surface 23b in the direction of gravity.
  • the power converter 1 may be mounted on the vehicle in such a manner that two of the first to fourth side portions 24a to 24d face each other in the gravitational direction.
  • the maximum width of the second central wall portion 32 in the y direction may be larger than the maximum width of the first central wall portion 31 in the y direction. As shown in FIG. 14, the width in the y direction may be widened so that the second central wall portion 32 faces the second side portion 24b.
  • the boundary between the first flow path 110 and the second flow path 120 corresponds to the bend start of the second central wall portion 32 .
  • the boundary between the second flow path 120 and the third flow path 130 is in the x direction. corresponds to the same position as the boundary between the first channel 110 and the second channel 120 .
  • a first joint portion 33a may be provided near the boundary between the first central wall portion 31 and the second central wall portion 32.
  • the cover 50 may be annularly friction stir welded to the second central wall portion 32 along the first inner surface 30a of the second central wall portion 32 from the first joint portion 33a. In that case, the joint area between the cover 50 and the second central wall portion 32 is increased.
  • the angle formed by the joining portion 33b and the portion to be joined is an acute angle. According to this, the joint portion between the cover 50 and the second central wall portion 32 is located closer to the first inner surface 30a of the second central wall portion 32 . Therefore, the joint area between the cover 50 and the second central wall portion 32 is widened.
  • the width of the second central wall portion 32 in the y direction may widen toward the fourth side portion 24d.
  • the width of the second central wall portion 32 in the y direction may be widened so that the second central wall portion 32 faces both the second side portion 24b and the fourth side portion 24d.
  • the cover 50 of the bottom portion 23 of the main body 20 is brought into contact with the main body 20 for provisional positioning.
  • a friction stir welding tool is pressed so that the cover 50 presses against the second central wall portion 32 at the first joint portion 33a.
  • the tool is circularly moved along the first inner surface 30a of the second central wall portion 32 from the first joining portion 33a. In other words, the tool is circularly moved from the first joining portion 33 a along the edge of the second central wall portion 32 on the side of the second flow path 120 .
  • the cover 50 is joined to the central wall portion 35 and the outer peripheral wall portion 40 by friction stir welding.
  • the cover 50 and the bottom portion 23 of the main body 20 are friction-stir-welded, making it possible to reduce the size compared to the case of joining with screws or the like. An increase in the number of parts is suppressed.
  • configurations disclosed in this specification include features of configuration group A as follows. According to feature A1 described below, the joint area between the cover 50 and the second central wall portion 32 is suppressed from becoming narrow.
  • a main body (20) comprising a concave portion (30) recessed in the direction in which the lower surface and the upper surface are aligned from the lower surface (23b) toward the upper surface (23a); a cover (50) that closes the recess and forms a flow path by joining the main surface (50a) to the lower surface so as to surround the flow path;
  • the flow path is a first channel (110) having one end connected to a supply port; a third flow path (130) aligned with the first flow path in the horizontal direction in which the supply port and the discharge port are aligned and having one end connected to the discharge port; a second flow path (120) extending from the first flow path toward the third flow path and connecting the other end of the first flow path and the other end of the third flow path;
  • the bottom is Having a central wall (35) surrounded in the circumferential direction around the direction aligned with the flow channel, and an outer peripheral wall (40) surrounding the flow channel in the circumferential direction,
  • the central wall has a
  • a main body (20) comprising a concave portion (30) recessed in the direction in which the lower surface and the upper surface are aligned from the lower surface (23b) toward the upper surface (23a); a cover (50) that closes the recess and forms a flow path by joining the main surface (50a) to the lower surface so as to surround the flow path;
  • the flow path is a first channel (110) having one end connected to a supply port; a third flow path (130) aligned with the first flow path in the horizontal direction in which the supply port and the discharge port are aligned and having one end connected to the discharge port; a second flow path (120) extending from the first flow path toward the third flow path and connecting the other end of the first flow path and the other end of the third flow path;
  • the bottom is Having a central wall (35) surrounded in the circumferential direction around the direction aligned with the flow channel, and an outer peripheral wall (40) surrounding the flow channel in the circumferential direction,
  • the central wall has a
  • a main body (20) comprising a concave portion (30) recessed in the direction in which the lower surface and the upper surface are aligned from the lower surface (23b) toward the upper surface (23a); a cover (50) that closes the recess and forms a flow path by joining the main surface (50a) to the lower surface so as to surround the flow path;
  • the flow path is a first channel (110) having one end connected to a supply port; a third flow path (130) aligned with the first flow path in the horizontal direction in which the supply port and the discharge port are aligned and having one end connected to the discharge port; a second flow path (120) extending from the first flow path toward the third flow path and connecting the other end of the first flow path and the other end of the third flow path;
  • the bottom is Having a central wall (35) surrounded in the circumferential direction around the direction aligned with the flow channel, and an outer peripheral wall (40) surrounding the flow channel in the circumferential direction,
  • the central wall has a
  • An electric device ( In 1), A supply port (111) to which the coolant is supplied, a discharge port (131) to which the coolant is discharged, and the bottom (23) so as to connect the supply port and the discharge port to partition a part of the flow path.
  • a main body (20) comprising a concave portion (30) recessed in the direction in which the lower surface and the upper surface are aligned from the lower surface (23b) toward the upper surface (23a); a cover (50) that closes the recess and forms a flow path by joining the main surface (50a) to the lower surface so as to surround the flow path;
  • the flow path is a first channel (110) having one end connected to a supply port; a third flow path (130) aligned with the first flow path in the horizontal direction in which the supply port and the discharge port are aligned and having one end connected to the discharge port; a second flow path (120) extending from the first flow path toward the third flow path and connecting the other end of the first flow path and the other end of the third flow path;
  • the bottom is Having a central wall portion (35) surrounded in the circumferential direction around the direction aligned with the flow channel, and an outer peripheral wall portion (40) surrounding the flow channel in the circumferential direction,
  • the central wall 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)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
PCT/JP2022/022472 2021-07-05 2022-06-02 ケースおよび電気装置 Ceased WO2023281947A1 (ja)

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JP2021111691A JP7552520B2 (ja) 2021-07-05 2021-07-05 ケースおよび電気装置
JP2021-111691 2021-07-05

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JP2018186633A (ja) * 2017-04-25 2018-11-22 株式会社デンソー 電力変換装置
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JP5236838B2 (ja) * 2010-10-27 2013-07-17 本田技研工業株式会社 冷却構造体
KR101375956B1 (ko) * 2012-07-05 2014-03-18 엘에스산전 주식회사 자동차용 전장부품 박스
JP6540496B2 (ja) * 2015-12-17 2019-07-10 株式会社デンソー 電力変換装置
JP6977495B2 (ja) * 2017-11-14 2021-12-08 トヨタ自動車株式会社 電力制御装置とその車載構造
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JP2002257490A (ja) * 2001-03-02 2002-09-11 Nippon Light Metal Co Ltd ヒートプレートおよびその製造方法
JP2006342367A (ja) * 2005-06-07 2006-12-21 Hitachi Cable Ltd 冷却板
JP2010027963A (ja) * 2008-07-23 2010-02-04 Shindengen Electric Mfg Co Ltd 冷却器
JP2010272870A (ja) * 2009-05-22 2010-12-02 Ls Industrial Systems Co Ltd 水冷式クーラー及びこれを備えるインバータ
JP2018186633A (ja) * 2017-04-25 2018-11-22 株式会社デンソー 電力変換装置
JP2020194695A (ja) * 2019-05-28 2020-12-03 昭和電工パッケージング株式会社 熱交換器

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JP2023008266A (ja) 2023-01-19
US20240237284A9 (en) 2024-07-11
US20240138109A1 (en) 2024-04-25
US12520453B2 (en) 2026-01-06

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