WO2021215209A1 - 車載電気部品内回路ユニット - Google Patents

車載電気部品内回路ユニット Download PDF

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Publication number
WO2021215209A1
WO2021215209A1 PCT/JP2021/013804 JP2021013804W WO2021215209A1 WO 2021215209 A1 WO2021215209 A1 WO 2021215209A1 JP 2021013804 W JP2021013804 W JP 2021013804W WO 2021215209 A1 WO2021215209 A1 WO 2021215209A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
electric component
circuit unit
housing
grommet
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/JP2021/013804
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
清水　宏
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.)
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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 Sumitomo Wiring Systems Ltd, AutoNetworks Technologies Ltd, Sumitomo Electric Industries Ltd filed Critical Sumitomo Wiring Systems Ltd
Priority to US17/917,152 priority Critical patent/US12081007B2/en
Priority to CN202180029351.3A priority patent/CN115428286A/zh
Publication of WO2021215209A1 publication Critical patent/WO2021215209A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/0207—Wire harnesses
    • B60R16/0215—Protecting, fastening and routing means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/0207—Wire harnesses
    • B60R16/0215—Protecting, fastening and routing means therefor
    • B60R16/0222—Grommets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5205—Sealing means between cable and housing, e.g. grommet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • H01R13/74—Means for mounting coupling parts in openings of a panel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
    • 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
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/04—Metal casings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/14—Fastening of cover or lid to box

Definitions

  • the present disclosure relates to a circuit unit in an in-vehicle electric component housed in a housing of an in-vehicle electric component.
  • Patent Document 1 describes a structure in which a circuit unit such as a junction box is housed together with a battery module, a battery control system, and the like in a housing of a battery pack, which is an in-vehicle electric component mounted on a vehicle.
  • a connector to which an external mating connector is connected is provided on the peripheral wall of the housing, and the connector and the circuit unit are connected.
  • a structure is adopted in which the wires are conductively connected by a covered electric wire or a bus bar.
  • Patent Document 1 it is necessary to perform the connection work between the connector provided in the housing and the circuit unit at the time of assembling the circuit unit to the battery pack. Therefore, there is an inherent problem that the work man-hours on the battery pack side increase. Further, a space for connection work is required between the connector provided in the housing and the circuit unit, which has led to an increase in the size of the battery pack.
  • the circuit unit in an in-vehicle electric component of the present disclosure includes an insulating holding body for holding a circuit member, a coated electric wire, and a circuit-side connector provided at one end of the coated electric wire and connected to the circuit member.
  • a wire harness provided with a connector provided at the other end of the coated electric wire and a tubular grommet through which the coated electric wire penetrates, and a plate wall covering a housing through hole provided in a housing of an in-vehicle electric component.
  • a portion and an annular sealing member provided on the first surface of the plate wall portion, which is a surface to be attached to the housing, and in contact with the peripheral edge of the housing through hole, and penetrate the plate wall portion in the plate thickness direction.
  • This is a circuit unit in an in-vehicle electric component, in which the wire harness penetrates through the grommet mounting hole provided therein, and the grommet of the wire harness is in close contact with the grommet mounting hole to seal the grommet mounting hole.
  • circuit unit in an in-vehicle electric component having a new structure capable of reducing the work man-hours on the in-vehicle electric component side and downsizing the in-vehicle electric component.
  • FIG. 1 is an overall perspective view showing a state in which the circuit unit in the vehicle-mounted electric component according to the first embodiment is housed in the housing of the vehicle-mounted electric component.
  • FIG. 2 is an exploded perspective view of FIG.
  • FIG. 3 is an exploded perspective enlarged view of the circuit unit in the vehicle-mounted electric component shown in FIG.
  • FIG. 4 is an enlarged cross-sectional view of IV-IV in FIG.
  • FIG. 5 is a diagram schematically showing an electrical configuration of a circuit unit in an in-vehicle electric component in a path from a power source to a load.
  • the circuit unit in the in-vehicle electric component of the present disclosure is (1) An insulating holding body for holding a circuit member, a coated wire, a circuit-side connector provided at one end of the coated wire and connected to the circuit member, and the other end of the coated wire.
  • a wire harness provided with a connector provided, a tubular grommet through which the covered electric wire penetrates, a plate wall portion covering a housing through hole provided in a housing of an in-vehicle electric component, and the plate wall portion.
  • a grommet mounting hole provided on the first surface, which is a surface to be attached to the housing, including an annular sealing member that contacts the peripheral edge of the housing through hole, and penetrating the plate wall portion in the plate thickness direction.
  • This is a circuit unit in an in-vehicle electric component, through which the wire harness penetrates, the glomet of the wire harness is in close contact with the glomet mounting hole, and the glomet mounting hole is sealed.
  • the connector provided in the housing of the vehicle-mounted electric component is attached to the other end of the wire harness connected to the circuit member held by the holder. It is provided. Further, a plate wall portion covering the housing through hole provided in the housing of the vehicle-mounted electric component is attached to the wire harness connected to the circuit member via a grommet.
  • the connector provided in the housing of the vehicle-mounted electric component in the conventional structure can be used as a constituent member of the circuit unit in the vehicle-mounted electric component, and the connector can be connected to the circuit member in advance.
  • the housing through hole provided in the in-vehicle electric component can be closed by covering it with the plate wall portion attached to the wire harness.
  • the board wall portion is provided on the first surface, which is the surface to be attached to the housing, and includes an annular sealing member that contacts the peripheral edge of the housing through hole, and the grommet mounting hole provided on the board wall portion is in close contact with the grommet. It is sealed by. Therefore, the waterproof property of the housing through hole can be maintained.
  • the board wall portion is a component on the circuit unit side in the vehicle-mounted electric component provided separately from the housing of the vehicle-mounted electric component, the board wall portion is not limited by the material of the housing. The degree of freedom in selecting materials is improved.
  • the annular seal member constitutes a so-called surface seal sandwiched between the peripheral edge of the housing through hole and the facing surface of the plate wall portion. Therefore, the assembly tolerance in the two directions orthogonal to the direction in which the plate wall portion is attached to the housing can also be absorbed by the bending deformation of the seal member.
  • the board wall portion may be overlapped with respect to the through hole of the housing from the inside of the housing, or may be overlapped from the outside of the housing.
  • the plate wall portion is made of metal. This is because the deformation of the plate wall portion itself is suppressed, the adhesion between the grommet and the grommet mounting hole can be more advantageously maintained, and the waterproof property can be advantageously ensured.
  • the first surface of the plate wall portion is a surface on the side facing the circuit side connection portion. Since the first surface is the surface facing the circuit-side connection portion, the board wall portion can be attached to the housing from the outside of the housing. Therefore, a large work space can be secured and workability can be improved.
  • the wire harness is passed through the grommet insertion hole of the plate wall portion to insert the grommet into the grommet mounting hole. It should be in close contact with.
  • the base plate portion is provided with a support leg portion that projects downward from the base plate portion. Since the support legs are provided on the base plate, the circuit unit can be mounted on other components housed in the in-vehicle electric components. Further, by changing the protruding length of the support leg portion, it becomes easy to adjust the height position of the plate wall portion with respect to the housing through hole, and it can be applied to the housing through hole provided at various height positions. It is possible to provide a circuit unit in an in-vehicle electric component having high versatility.
  • the base plate portion is made of a material having higher thermal conductivity than the holding body. Since the base plate is made of a material that has higher thermal conductivity than the holder, heat is dissipated from the circuit member including heat generating parts such as relays and fuses that have been transferred to the holder via the base member. Can be done.
  • the circuit unit 10 in an in-vehicle electric component is mounted on a vehicle (not shown) such as an electric vehicle or a hybrid vehicle, and supplies and controls electric power from a power source 12 such as a battery to a load 14 such as a motor (FIG. 5). reference).
  • the circuit unit 10 in the vehicle-mounted electric component can be arranged in any direction, but the Z direction will be described as upward, the Y direction as the width direction, and the X direction as the front in the length direction. Further, with respect to a plurality of the same members, a reference numeral may be added to only a part of the members, and the reference numeral may be omitted for other members.
  • the in-vehicle electric component internal circuit unit 10 includes an in-vehicle electric component internal circuit unit 10a provided on the positive electrode side and an in-vehicle electric component internal circuit unit 10b provided on the negative electrode side.
  • the positive electrode side of the power supply 12 is connected to the input side of the circuit unit 10a in the vehicle-mounted electric component, and the negative electrode side of the power supply 12 is connected to the input side of the circuit unit 10b in the vehicle-mounted electric component.
  • the positive electrode side of the load 14 is connected to the output side of the circuit unit 10a in the vehicle-mounted electric component, and the negative electrode side of the load 14 is connected to the output side of the circuit unit 10b in the vehicle-mounted electric component.
  • Relays 16 for connecting the power supply 12 to the load 14 are connected between the input side and the output side of the in-vehicle electric component internal circuit unit 10a and the in-vehicle electric component internal circuit unit 10b, respectively.
  • a precharge circuit 22 in which the precharge resistor 18 and the precharge relay 20 are connected in series so as to bypass the relay 16 is connected to the relay 16 that connects the power supply 12 and the positive electrode side of the load 14. ..
  • the precharge resistor 18 is connected to the input side of the precharge relay 20.
  • the precharge circuit 22 is also connected to the relay 16 that connects the power supply 12 and the negative electrode side of the load 14, but in order to facilitate understanding, in the first embodiment of the present disclosure, the power supply 12 and the load 14 are connected.
  • the precharge circuit 22 connected to the relay 16 connecting the negative electrode side is not shown.
  • both the relay 16 and the precharge relay 20 are relays that move the contact portion to switch the contact portion ON / OFF while the exciting coil is energized, and are power distribution components provided in the in-vehicle electric component 146 described later. ON / OFF control is performed by the control circuit in 154.
  • the in-vehicle electric component internal circuit unit 10a and the in-vehicle electric component internal circuit unit 10b have substantially the same structure.
  • the in-vehicle electric component internal circuit unit 10 includes a lower case 24 located below and an upper case 26 located above when mounted on a vehicle, and is insulated by the lower case 24 and the upper case 26.
  • the holding body 28 is configured.
  • the circuit unit 10 in the vehicle-mounted electric component includes a base plate portion 30 on which the holding body 28 is placed and fixed.
  • the base plate portion 30 has a rectangular flat plate shape, and is formed by, for example, die casting or press punching.
  • the circuit unit 10 in the vehicle-mounted electric component includes a plate wall portion 32 that covers the housing through hole 180 provided in the housing 152 of the vehicle-mounted electric component 146, which will be described later.
  • the plate wall portion 32 has a rectangular flat plate shape, and is formed by, for example, die casting or press punching. As described above, the base plate portion 30 and the plate wall portion 32 are formed by using a metal such as aluminum or an aluminum alloy.
  • the in-vehicle electric component internal circuit unit 10 includes a wire harness 34 for connecting the in-vehicle electric component internal circuit unit 10a and the output side of the in-vehicle electric component internal circuit unit 10a to the load 14.
  • ⁇ Holder 28> In a state where the lower case 24 and the upper case 26 constituting the holding body 28 are assembled, a bus bar (not shown) connecting the relay 16 and the precharging circuit 22 and the inside of the precharging circuit 22 are connected inside the holding body 28 (not shown). A bus bar etc. are stored. Further, as shown in FIGS. 2 and 3, the two relays 16 and the bus bars connected to the connection portions 36a and 36b of the respective relays 16 are connected to the holding body 28 to which the lower case 24 and the upper case 26 are assembled. 38 and 40 are held.
  • the lower case 24 is formed by injection molding an insulating synthetic resin into a predetermined shape. As shown in FIG. 3, for example, the lower case 24 has a flat rectangular box shape as a whole. As shown in FIG. 3, the lower case 24 is open upward, and the four corners of the lower case 24 are notched in a quadrant circle.
  • the upper case 26 is formed by injection molding an insulating synthetic resin into a predetermined shape. As shown in FIG. 3, for example, the upper case 26 has a flat rectangular box shape as a whole. The upper case 26 opens downward, and bolt insertion holes 42 are formed at the four corners of the upper case 26. As shown in FIG. 3, bus bar fixing cylinders 46 having two cylindrical shapes are formed at both ends of the top surface 44 of the upper case 26 in the length direction so as to project upward. The two bus bar fixing cylinders 46 are arranged apart from each other in the width direction. A bolt hole 48 that opens upward is provided on the upper surface of each bus bar fixing cylinder portion 46.
  • a relay fixing cylinder portion 50 having six cylindrical shapes is formed so as to project upward.
  • Bolt holes 52 that open upward are provided on the upper surface of these relay fixing cylinders 50.
  • a precharge resistor mounting portion 54 for accommodating the precharge resistor 18 and a precharge relay mounting portion 56 for accommodating the precharge relay 20 are opened upward. It is provided.
  • the relay 16 is a mechanical relay, and ON / OFF control is performed by a control circuit provided in the power distribution component 154 of the vehicle-mounted electric component 146, which will be described later.
  • the relay 16 includes a block-shaped relay main body 58, a pair of annular connecting portions 36a and 36b, and a plurality of (three in the present embodiment) leg portions 60.
  • the leg portion 60 is formed so as to project outward in a flat plate shape.
  • the leg portion 60 has a bolt insertion hole 62 penetrating in the vertical direction.
  • bus bars 38, 40 The pair of bus bars 38 and 40 are formed by processing a metal plate material, each of which has conductivity. Each of the bus bars 38 and 40 has a crank shape, for example, as shown in FIG. One end of each of the bus bars 38 and 40 is connected to the connection portions 36a and 36b of the relay 16. The other end 39 of the bus bar 38 is connected to a circuit-side connection 104 provided at one end of a covered electric wire 102 constituting a wire harness 34, which will be described later. The other end 41 of the bus bar 40 constitutes the input side of the circuit unit 10 in the vehicle-mounted electric component, and the positive electrode side and the negative electrode side of the power supply 12 are connected to each other.
  • the other end 41 of the bus bar 40 is inserted into the housing 152 of the vehicle-mounted electric component 146 through a wire harness insertion hole 168 provided in the housing 152 of the vehicle-mounted electric component 146 as described later. , It is connected to a wire harness 172 connected to the power supply 12 (see FIG. 2).
  • the wire harness 172 is attached to the wire harness insertion hole 168 via, for example, a grommet 170, so that waterproofness is ensured.
  • the wire harness 172 is also connected to a power distribution component 154, which will be described later.
  • the in-vehicle electric component internal circuit unit 10 has a rectangular flat plate-shaped base plate portion 30.
  • Case fixing cylinders 66 having a cylindrical shape are formed at four corners of the upper surface 64 of the base plate portion 30 so as to project upward.
  • a bolt hole 68 that opens upward is provided on the protruding end surface of the case fixing cylinder portion 66.
  • two bolt insertion holes 70 are formed so as to penetrate in the plate thickness direction, separated from each other in the length direction.
  • the base plate portion 30 is provided with a support leg portion 72.
  • the support leg portion 72 is formed by injection molding an insulating synthetic resin into a predetermined shape through a gutter shape that opens downward and extends in the width direction (Y direction).
  • the support leg 72 has a rectangular flat top wall 74 and a pair of side walls 76, 76 protruding downward from both ends in the length direction (X direction) of the top wall 74.
  • Bolt insertion holes 78 are formed at the four corners of the top wall 74.
  • the pair of side walls 76, 76 are formed with support leg flange portions 80 extending in the length direction from the protruding end portions in a direction away from the facing side walls 76.
  • Bolt insertion holes 82 are formed in the support leg flange portions 80 at three locations separated from each other in the width direction (Y direction).
  • the vehicle-mounted electric component internal circuit unit 10 has a rectangular flat plate-shaped plate wall portion 32.
  • the plate wall portion 32 is a surface that is overlapped and attached to the housing 152 of the in-vehicle electric component 146, which will be described later, and is a surface opposite to the first surface 84 located rearward in FIG. 2 and FIG. It has a second surface 86 located in front of it.
  • bolt insertion holes 88 are formed at the four corners of the first surface 84 of the plate wall portion 32.
  • a plate wall through hole 90 having a rectangular cross-sectional shape penetrating in the plate thickness direction (front-rear direction) is formed.
  • a cylindrical tubular portion 92 that projects forward over the entire circumference is provided on the peripheral edge of the plate wall through hole 90.
  • a flange portion 94 extending inward is formed at the protruding end portion of the tubular portion 92, and a circular cross-sectional shape penetrating in the plate thickness direction (front-rear direction) is formed at the central portion of the flange portion 94.
  • the grommet mounting hole 96 is formed.
  • a seal member storage groove 98 extending over the entire circumference in a rectangular cross-sectional shape is formed on the first surface 84 of the board wall portion 32 along the peripheral edge portion of the board wall portion 32. Has been done.
  • An annular rubber seal member 100 is housed in the seal member storage groove 98.
  • the wire harness 34 is connected to two coated electric wires 102 and a bus bar 38 provided at one end (rear end in FIG. 3) of each coated electric wire 102 and constituting a circuit member.
  • the circuit side connection portion 104 is provided.
  • the wire harness 34 includes a connector 106 provided at the other end portion (front end portion in FIG. 3) of the coated electric wire 102, and a tubular grommet 108 through which the coated electric wire 102 penetrates.
  • the coated electric wire 102 has a core wire 110 and an insulating coating 112 that covers the core wire 110. More specifically, in the coated electric wire 102, the core wire 110 composed of a plurality of metal strands such as copper, aluminum and other conductors is covered with an insulating coating 112 having electrical insulating properties such as ethylene resin and styrene resin. It is a broken structure. As shown in FIG. 3, at one end of the coated electric wire 102, the insulating coating 112 is peeled off to expose the core wire 110, and the core wire crimping portion 116 of the crimp terminal 114 is crimped to the exposed core wire 110.
  • each covered electric wire 102 a circuit-side connection portion 104 formed by a tab-shaped connection portion of the crimp terminal 114 is provided. Further, as shown in FIG. 4, at the other end of the coated electric wire 102, the insulating coating 112 is peeled off to expose the core wire 110, and a known technique such as welding is used for the exposed core wire 110.
  • the external connection portion 118 is configured by connecting the metal plate-shaped members.
  • the connector 106 has a connector housing 120 made of synthetic resin.
  • the connector housing 120 has a rectangular box shape that opens toward the front. Further, the connector housing 120 is provided with a tubular portion 124 that cylindrically protrudes rearward from the peripheral edge portion of the bottom wall 122 of the connector housing 120. Further, a vertically long slit-shaped external connection portion insertion hole 126 is formed in the bottom wall 122 of the connector housing 120 so as to penetrate in the plate thickness direction (see FIG. 4). Then, the external connection portion 118 is press-fitted into the external connection portion insertion hole 126 of the connector housing 120, so that the connector 106 is provided at the other end of the covered electric wire 102.
  • the grommet 108 through which the coated electric wire 102 penetrates is provided with cylindrical electric wire insertion portions 128 at both ends in the length direction (X direction), and is made of EPDM (ethylene propylene rubber). It is integrally formed of a rubber material such as CR (chloroprene rubber) and SI (silicon rubber).
  • a bellows portion 130 and a large-diameter tubular portion 132 are provided between the pair of electric wire insertion portions 128 and 128 provided at both ends.
  • the bellows portion 130 has a bellows-shaped hollow tubular structure.
  • the ridges 134 and the valleys 136 extending in an annular shape are alternately connected in the length direction (see FIG. 4), and the bellows portion 130 can be expanded and contracted in the length direction and is orthogonal to the length direction. It can be bent in the directions (Y direction and Z direction).
  • An annular groove portion 138 extending in a rectangular cross-sectional shape is formed on the outer peripheral surface of the large-diameter tubular portion 132, and is fitted into the inner edge portion of the grommet mounting hole 96 formed in the plate wall portion 32. , The grommet 108 is fixed to the plate wall portion 32.
  • the large-diameter tubular portion 132 is connected to the bellows portion 130 via the enlarged-diameter tubular portion 140.
  • the diameter-expanded cylinder portion 140 is formed so as to increase the diameter from the bellows portion 130 toward the large-diameter cylinder portion 132.
  • the large-diameter tubular portion 132 is connected to the electric wire insertion portion 128 provided at the rear end portion of the grommet 108 via the reduced-diameter tubular portion 142.
  • the reduced-diameter tubular portion 142 is formed so as to reduce the diameter from the large-diameter tubular portion 132 toward the electric wire insertion portion 128.
  • the inner surface of the grommet 108 is covered by connecting the electric wire insertion portion 128, the bellows portion 130, the enlarged diameter tubular portion 140, the large diameter tubular portion 132, the reduced diameter tubular portion 142, and the electric wire insertion portion 128.
  • the covered electric wire insertion hole 144 through which the electric wire 102 is inserted is formed so as to open in the front-rear direction.
  • the in-vehicle electric component 146 shown in FIGS. 1 and 2 is mounted on a vehicle (not shown) such as an electric vehicle or a hybrid vehicle. As shown in FIG. 2, for example, the in-vehicle electric component 146 includes a lower cover 148 located below and an upper cover 150 located above when mounted on a vehicle, and the housing 152 is insulated by the lower cover 148 and the upper cover 150. Is configured. Further, the in-vehicle electric component 146 houses a power distribution component 154 having a control circuit or the like in the housing 152.
  • the lower cover 148 is formed by injection molding an insulating synthetic resin into a predetermined shape.
  • the lower cover 148 has a rectangular box shape and opens upward.
  • the lower cover 148 has a lower cover flange portion 156 extending outward in the horizontal direction (width direction and length direction) from the peripheral edge portion of the opening to the entire circumference.
  • the lower cover flange portion 156 is provided with a plurality of bolt insertion holes 158 penetrating in the plate thickness direction (20 in the present embodiment) separated in the circumferential direction.
  • the bolt insertion hole 158 is also formed so as to extend into the cylindrical lower cover fixing cylinder portion 160 that projects downward from the lower surface of the lower cover flange portion 156.
  • a wire harness insertion hole 168 having a circular cross-sectional shape is formed through the peripheral wall 166 on one side in the width direction (Y direction) of the lower cover 148 in the plate thickness direction.
  • a cylindrical rubber grommet 170 is fitted in the wire harness insertion hole 168, and the wire harness 172 is inserted into the housing 152 through a through hole provided in the center of the grommet 170.
  • the wire harness 172 supplies power to the circuit unit 10 in the vehicle-mounted electric component and the power distribution component 154 of the vehicle-mounted electric component 146. Further, the grommet 170 stops water between the wire harness insertion hole 168 and the wire harness 172.
  • the upper cover 150 is formed by injection molding an insulating synthetic resin into a predetermined shape.
  • the upper cover 150 has a rectangular box shape and opens downward.
  • the upper cover 150 has an upper cover flange portion 174 that extends outward in the horizontal direction (width direction and length direction) from the peripheral edge of the opening to the entire circumference.
  • the upper cover flange portion 174 is provided with a plurality of bolt insertion holes 176 penetrating in the plate thickness direction (20 in the present embodiment) separated in the circumferential direction.
  • a horizontally long rectangular cross-sectional shape housing through hole 180 is formed through the peripheral wall 178 on the front side (X direction) side of the upper cover 150 in the plate thickness direction.
  • Bolt insertion holes 182 are formed in the vicinity of the four corners of the peripheral edge of the housing through hole 180.
  • the lower case 24 and the upper case 26 constituting the holding body 28 are prepared.
  • the lower case 24 and the upper case 26 are assembled in a state where a bus bar (not shown) for connecting the relay 16 and the precharge circuit 22 and a bus bar (not shown) for connecting the inside of the precharge circuit 22 are housed inside the holder 28.
  • the holding body 28 is completed.
  • the precharge resistor 18 and the precharge relay 20 are housed in the precharge resistor mounting portion 54 and the precharge relay mounting portion 56 provided on the holding body 28 from above.
  • the leg portion 60 of the relay 16 is arranged on the relay fixing cylinder portion 50 provided on the holding body 28 and fastened with bolts.
  • each bus bar 38, 40 is connected to the connection portions 36a, 36b of the relay 16 by bolting, and a pair of bus bars are provided on the bus bar fixing cylinder portion 46 provided on the holding body 28.
  • the other end 39,41 of 38,40 is arranged.
  • the other end 39 of the bus bar 38 is bolted to and fixed to the bus bar fixing cylinder 46 together with the circuit side connection 104 provided at the crimp terminal 114 of the wire harness 34 as described later.
  • the other end 41 of the bus bar 40 is bolted to and fixed to the bus bar fixing cylinder 46 together with a connecting member provided on a wire harness (not shown) connected to the power supply 12.
  • the circuit member is composed of the precharge resistor 18 and the precharge relay 20 constituting the precharge circuit 22, the relay 16, various bus bars housed in the holding body 28, and the like. Then, these circuit members are held by the insulating holding body 28.
  • the base plate portion 30 is formed of aluminum or an aluminum alloy, and the holding body 28 is made of synthetic resin. That is, the base plate portion 30 is made of a material having a higher thermal conductivity than the holding body 28. As a result, heat can be dissipated from the circuit member including the heat generating component such as the relay 16 and the fuse which have been transferred to the holding body 28 via the base plate portion 30.
  • the base plate portion 30 on which the holding body 28 is placed and fixed is placed on the top wall 74 of the support leg portion 72 from above.
  • the bolts are fastened and fixed.
  • the base plate portion 30 is provided with a support leg portion 72 that projects downward (in the direction opposite to the arrow in the Z direction) from the base plate portion 30.
  • the wire harness 34 More specifically, first, two covered electric wires 102 are prepared. Then, the insulating coating 112 is peeled off at one end (rear end in FIG. 3) of each covered electric wire 102 to expose the core wire 110, and the core wire crimping portion 116 of the crimp terminal 114 is attached to the exposed core wire 110. Crimping. As a result, a circuit-side connection portion 104 composed of tab-shaped connection portions of the crimp terminal 114 is formed at one end of each covered electric wire 102. Further, at the other end (front end in FIG.
  • each covered electric wire 102 the insulating coating 112 is peeled off to expose the core wire 110, and the exposed core wire 110 is welded or the like by using a known technique such as welding. Connect metal plate-shaped members. As a result, the external connection portion 118 is formed.
  • the connector housing 120 is prepared, and the external connection portion 118 is press-fitted into the external connection portion insertion hole 126 of the connector housing 120. As a result, a connector 106 having an external connection portion 118 is formed at the other end of the covered electric wire 102.
  • the grommet 108 prepares the grommet 108.
  • the coated electric wire 102 configured as described above is inserted into the coated electric wire insertion hole 144 of the grommet 108 from the circuit side connection portion 104 side, and the grommet 108 is arranged at a predetermined position of the grommet 108.
  • the wire harness 34 is completed.
  • the circuit-side connecting portion 104 provided in the wire harness 34 configured in this way is bolted to the other end 39 of the bus bar 38 of the holding body 28 configured as described above.
  • the board wall portion 32 is prepared.
  • the circuit unit 10 in the vehicle-mounted electric component in the state before the plate wall portion 32 is assembled to the grommet 108 is prepared.
  • the circuit unit 10 in the vehicle-mounted electric component before assembling the board wall portion 32 is housed in the housing 152 of the vehicle-mounted electric component 146. More specifically, the power distribution component 154 is housed in the housing 152 of the vehicle-mounted electric component 146.
  • the support legs 72 provided in the circuit unit 10 in the vehicle-mounted electric component are covered so as to cover the power distribution component 154 from above.
  • the bolt insertion hole 82 provided in the support leg flange portion 80 of the support leg portion 72 is placed on the support leg portion fixing cylinder portion 164 provided in the lower cover 148 of the housing 152 of the vehicle-mounted electric component 146. After that, bolt it to fix it.
  • the lower cover 148 of the vehicle-mounted electric component 146 on which the circuit unit 10 in the vehicle-mounted electric component before assembling the board wall portion 32 is mounted is covered with the upper cover 150.
  • the plate wall portion 32 is used to cover the housing through hole 180 provided in the upper cover 150. That is, the bolt insertion holes 88 provided in the plate wall portion 32 are overlapped with the bolt insertion holes 182 provided in the upper cover 150 from the outside and bolted.
  • the housing through hole 180 provided in the upper cover 150 constituting the housing 152 of the vehicle-mounted electric component 146 is covered with the plate wall portion 32.
  • a housing through hole 180 is provided in the first surface 84 (rear surface in FIG.
  • the first surface 84 of the plate wall portion 32 is a surface on the side facing the circuit side connecting portion 104. That is, the surface on the side facing the circuit-side connecting portion 104 is the surface on the side facing the circuit-side connecting portion 104 in the X direction.
  • the lower cover 148 of the in-vehicle electric component 146 on which the in-vehicle electric component internal circuit unit 10 before assembling the board wall portion 32 is mounted is covered with the upper cover 150 in which the housing through hole 180 is covered by the plate wall portion 32. ..
  • the external connection portion 118 side of the wire harness 34 of the in-vehicle electric component internal circuit unit 10 is passed through the housing through hole 180 and the grommet mounting hole 96 from the inside of the upper cover 150.
  • the upper cover flange portion 174 is overlapped with the lower cover flange portion 156.
  • the inner edge portion of the grommet mounting hole 96 formed in the plate wall portion 32 is fitted into the annular groove portion 138 of the grommet 108 of the wire harness 34.
  • the bolt insertion hole 176 of the upper cover flange portion 174 is overlapped with the bolt insertion hole 158 of the lower cover flange portion 156 and bolted.
  • the circuit unit 10 in the vehicle-mounted electric component is housed and held in the housing 152 of the vehicle-mounted electric component 146.
  • the wire harness 34 penetrates through the grommet mounting hole 96 provided so as to penetrate the plate wall portion 32 in the plate thickness direction (X direction in FIG. 4).
  • the grommet 108 constituting the wire harness 34 is in close contact with the grommet mounting hole 96, the grommet mounting hole 96 is sealed by the grommet 108. Further, the annular seal member 100 is sandwiched between the plate wall portion 32 and the peripheral edge of the housing through hole 180.
  • the connector conventionally provided in the housing 152 of the in-vehicle electric component 146 is a wire constituting the in-vehicle electric component internal circuit unit 10. It is provided at the other end of the harness 34. Moreover, the plate wall portion 32 covering the housing through hole 180 provided in the housing 152 of the vehicle-mounted electric component 146 is attached to the wire harness 34 constituting the circuit unit 10 in the vehicle-mounted electric component via the grommet 108. ing. Therefore, the connector conventionally provided in the housing 152 of the vehicle-mounted electric component 146 can be changed to the connector 106 constituting the circuit unit 10 in the vehicle-mounted electric component.
  • connection work between the connector provided in the housing 152 and the circuit unit in the vehicle-mounted electric component which has been conventionally required, becomes unnecessary, and the work man-hours can be reduced.
  • the size of the vehicle-mounted electric component 146 can be reduced.
  • the housing through hole 180 provided in the housing 152 of the vehicle-mounted electric component 146 is covered with the plate wall portion 32. Moreover, since the annular seal member 100 that contacts the peripheral edge of the housing through hole 180 is provided between the board wall portion 32 and the housing 152, water can enter from the gap between the board wall portion 32 and the housing 152. Is prevented. Further, since the grommet 108 constituting the wire harness 34 is in close contact with the grommet mounting hole 96 and the grommet mounting hole 96 is sealed, water intrusion from the gap between the wire harness 34 and the grommet mounting hole 96 is prevented. There is.
  • the board wall portion 32 is a component on the circuit unit 10 side in the vehicle-mounted electric component, the board wall portion 32 is not limited by the material of the housing 152 of the vehicle-mounted electric component 146, and the degree of freedom in selecting the material of the board wall portion 32 is increased. Improvements are being made. Therefore, for example, by making the plate wall portion 32 made of metal (made of aluminum or aluminum alloy in this embodiment) as in the present embodiment, the close contact state between the grommet 108 and the grommet mounting hole 96 of the plate wall portion 32 is advantageous. It can be realized and waterproofness can be secured advantageously. Moreover, since the board wall portion 32 is smaller than the entire vehicle-mounted electric component 146, it is possible to select a better material for the board wall portion 32 while suppressing an increase in cost.
  • the first surface 84 which is the surface of the plate wall portion 32 to be attached to the upper cover 150 constituting the housing 152, is the surface of the wire harness 34 facing the circuit side connection portion 104, the plate wall portion 32 Can be attached from the outside of the upper cover 150. Therefore, a large work space can be secured and workability can be improved.
  • annular seal member 100 constitutes a so-called surface seal sandwiched between the peripheral edge of the housing through hole 180 and the facing surface of the plate wall portion 32. Therefore, the assembly tolerance in the two directions orthogonal to the direction in which the plate wall portion 32 is attached to the housing 152 can also be absorbed by the bending deformation of the seal member 100.
  • the holding body 28 includes the base plate portion 30 on which the holding body 28 is placed and fixed, the circuit member held by the holding body 28 can be stably supported, and the durability of the entire circuit unit 10 in the vehicle-mounted electric component 10 can be stably supported. It is possible to improve the sex.
  • the support leg portion 72 is provided on the base plate portion 30, it is possible to mount the in-vehicle electric component internal circuit unit 10 on, for example, the power distribution component 154 housed in the in-vehicle electric component 146. Become. Further, by changing the protruding dimension of the side wall 76 of the support leg portion 72, the height position of the circuit unit 10 in the vehicle-mounted electric component with respect to the housing through hole 180 can be easily adjusted. Therefore, it is possible to apply the circuit unit 10 in the vehicle-mounted electric component to the housing through hole 180 provided at various height positions.
  • the plate wall portion 32 is overlapped with the peripheral edge of the housing through hole 180 from the outside of the housing 152, but the present invention is not limited to this.
  • the board wall portion 32 may be overlapped with the peripheral edge of the housing through hole 180 from the inside of the housing 152.
  • the plate wall portion 32 and the grommet 108 can be assembled before mounting the circuit unit 10 in the vehicle-mounted electric component on the housing 152.
  • the in-vehicle electric component 146 the one in which the power distribution component 154 and the in-vehicle electric component internal circuit unit 10 of the present disclosure are housed inside the housing 152 has been described as an example. Not limited to.
  • the in-vehicle electric component 146 may be, for example, a battery pack containing a battery instead of the power distribution component 154. In this case, it is not necessary to provide the wire harness insertion hole 168 in the housing 152.
  • the support legs 72 are fixed to the bottom surface 162 of the housing 152, but the present invention is not limited to this.
  • the support leg portion 72 can be fixed at an arbitrary location such as the peripheral wall 178 of the housing 152. Further, although the support leg portion 72 is a separate body from the base plate portion 30, it may or may not be integrally formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Connection Or Junction Boxes (AREA)
  • Casings For Electric Apparatus (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)
PCT/JP2021/013804 2020-04-21 2021-03-31 車載電気部品内回路ユニット Ceased WO2021215209A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/917,152 US12081007B2 (en) 2020-04-21 2021-03-31 In-vehicle electric component-internal circuit unit
CN202180029351.3A CN115428286A (zh) 2020-04-21 2021-03-31 车载电气部件内电路单元

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020075486A JP7401851B2 (ja) 2020-04-21 2020-04-21 車載電気部品内回路ユニット
JP2020-075486 2020-04-21

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JP (1) JP7401851B2 (enExample)
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JP2023125600A (ja) * 2022-02-28 2023-09-07 矢崎総業株式会社 電気接続箱

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JP7159235B2 (ja) * 2020-02-17 2022-10-24 矢崎総業株式会社 グロメット及びワイヤハーネス
JP2024179657A (ja) * 2023-06-15 2024-12-26 住友電装株式会社 コネクタ
JP2025030153A (ja) * 2023-08-23 2025-03-07 株式会社オートネットワーク技術研究所 電気機器

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JP2023125600A (ja) * 2022-02-28 2023-09-07 矢崎総業株式会社 電気接続箱

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JP2021175223A (ja) 2021-11-01
JP7401851B2 (ja) 2023-12-20
CN115428286A (zh) 2022-12-02
US12081007B2 (en) 2024-09-03
US20230163582A1 (en) 2023-05-25

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