WO2020170793A1 - Boîte de raccordement électrique - Google Patents

Boîte de raccordement électrique Download PDF

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Publication number
WO2020170793A1
WO2020170793A1 PCT/JP2020/004027 JP2020004027W WO2020170793A1 WO 2020170793 A1 WO2020170793 A1 WO 2020170793A1 JP 2020004027 W JP2020004027 W JP 2020004027W WO 2020170793 A1 WO2020170793 A1 WO 2020170793A1
Authority
WO
WIPO (PCT)
Prior art keywords
shield case
substrate
screw
junction box
shield
Prior art date
Application number
PCT/JP2020/004027
Other languages
English (en)
Japanese (ja)
Inventor
拓也 大田
Original Assignee
住友電装株式会社
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 住友電装株式会社 filed Critical 住友電装株式会社
Publication of WO2020170793A1 publication Critical patent/WO2020170793A1/fr

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    • 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
    • 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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • Patent Document 1 includes a circuit board, a heat dissipation member to which the circuit board is fixed on the upper surface side, and a shield cover which covers the upper side of the circuit board.
  • the heat dissipation member is made of a metal material having high thermal conductivity such as an aluminum alloy or a copper alloy, and the shield cover is formed by punching and bending a plate-shaped metal made of aluminum or the like.
  • the shield cover is fixed to the heat radiating member by screwing with the lower end portion of the shield cover overlapping the side surface of the heat radiating member, and the shield cover is connected to the ground via the heat radiating member.
  • the side of the heat dissipation member has a thickness dimension of the shield cover and a screw head part of the screw cover. There is a problem in that a thickness dimension is required, which tends to hinder the miniaturization of the electrical junction box.
  • the electrical junction box described in the present specification has a conductive path, a substrate on which electronic components are mounted, and an electrically conductive path that covers one surface of the substrate and is connected to the ground potential of the substrate.
  • a first shield case connected to the first shield case, a second shield case that is arranged with a gap from the surface of the substrate opposite to the one side, and covers the opposite surface of the substrate; And a conductive connecting member that is disposed so as to pass between the shield case and the second shield case and electrically connects between the first shield case and the second shield case.
  • the second shield case can be connected to the ground potential by the conductive connecting member arranged so as to pass between the first shield case and the second shield case.
  • the second shield case can be connected to the ground potential without screwing the overlapping portion of the first shield case connected to the ground potential and the second shield case from the outside with a screw.
  • the thickness dimension of the screw head is not necessarily required, and the electric junction box can be downsized.
  • connection member One end side of the connection member is connected to the conductive path of the substrate, and the other end side of the connection member is connected to the second shield case.
  • the second shield case can be connected to the ground potential with a simple structure.
  • connection member includes a conductive spacer portion sandwiched between the first shield case and the second shield case.
  • the spacer part is a cylindrical metal collar, and the shaft part of the screw penetrates the metal collar.
  • An end portion of the spacer portion is configured such that a screw can be screwed thereto, and at least one of the first shield case and the second shield case is connected to an end portion of the spacer portion from the outside through a shaft portion of the screw.
  • a through hole that allows screwing is formed therethrough.
  • the top view which shows the electric connection box of Embodiment 1. AA cross-sectional view of FIG. The figure which expanded a part of FIG. The top view which shows the electric junction box in the state which removed the 2nd shield cover.
  • the electric junction box 10 (FIG. 1) is mounted on a path from a power source such as a battery to a load such as a motor or an electric component in a vehicle such as an electric vehicle or a hybrid vehicle, and a power conversion unit such as a DC-DC converter. It can be used as a device.
  • a power source such as a battery
  • a load such as a motor or an electric component in a vehicle such as an electric vehicle or a hybrid vehicle
  • a power conversion unit such as a DC-DC converter.
  • the electric junction box 10 includes a case 11 having a first shield case 12 and a second shield case 16, a unit body 20 housed in the case 11, a first shield case 12 and a second shield case 12.
  • a connection member 50 for connecting the shield case 16 is provided.
  • the first shield case 12 is made of metal such as aluminum or aluminum alloy, has a rectangular plate shape, and has a substrate mounting portion 13 on which the substrate 21 is mounted and a recess below the substrate mounting portion 13. And a recess 15 for housing the component.
  • the substrate mounting portion 13 is provided on the peripheral portion side of the first shield case 12, and as shown in FIG. 3, a plurality of (four in this embodiment) circles through which the shaft portions 53A of the screws 53 can be inserted.
  • a through hole 14 having a shape is formed therethrough.
  • the through holes 14 are provided on the four corners of the first shield case 12 and are larger than the outer diameter of the columnar shaft portion 53A of the screw 53 and the circular outer diameter of the head portion 53B of the screw 53.
  • the component accommodating recess 15 is arranged in a rectangular region inside the substrate mounting portion 13, and is provided on the lower surface side of the substrate 21 so as to form a component accommodating space in which the electronic component 31 is accommodated.
  • the second shield case 16 is made of a metal such as aluminum or aluminum alloy, and is configured to cover the upper side of the first shield case 12 and the unit body 20 as shown in FIG. A plate portion 17 and a peripheral wall portion 19 extending downward from the peripheral edge of the top plate portion 17 are provided. As shown in FIG. 3, a plurality of (four in this embodiment) circular through holes 18 through which the shaft portions 53A of the screws 53 can be inserted are formed through the top plate portion 17.
  • the through holes 18 are provided on the four corners of the top plate portion 17, and have a diameter larger than the outer diameter of the shaft portion 53A of the screw 53 and smaller than the outer diameter of the head portion 53B of the screw 53. There is.
  • the peripheral wall portion 19 has a rectangular rectangular tube shape and surrounds the periphery of the unit main body 20.
  • the lower end portion (tip portion) of the peripheral wall portion 19 is not in contact with the peripheral edge portion of the first shield case 12, and the peripheral edge portion of the first shield case 12 and the lower end portion of the peripheral wall portion 19 in the second shield case 16 are not in contact with each other.
  • a gap G is formed between and.
  • the unit main body 20 includes a board 21, electronic components 31 and 32 mounted on the conductive paths 23A and 23B of the board 21, and a plurality of (in the present embodiment, mounted on the board 21. 9) power storage elements 40A to 40C.
  • the substrate 21 has a rectangular plate shape, and conductive paths 23A and 23B are formed on an insulating plate by a printed wiring technique.
  • the conductive paths 23A and 23B are formed on both surfaces of the substrate 21.
  • a plurality of electronic components 31 are mounted on the conductive paths 23A on the lower surface of the substrate 21, and a plurality of electronic components 32 are mounted on the conductive paths 23B on the upper surface of the substrate 21.
  • the plurality of electronic components 31 and 32 include a low-height component 31 and a high-height component 32 that is taller than the low-height component 31 (having a large vertical height).
  • the low-height component 31 may be, for example, a field effect transistor (FET), a resistor, a diode, a short capacitor, a microcomputer, or the like
  • the high-height component 32 may be, for example, a tall capacitor or a coil. it can.
  • a plurality of (four in the present embodiment) circular through holes 22 through which the shaft portions 53A of the screws 53 can be inserted are formed through the substrate 21.
  • the through holes 22 are provided on the four corners of the top plate portion 17, and have a diameter larger than the outer diameter of the shaft portion 53A of the screw 53 and smaller than the outer diameter of the head portion 53B of the screw 53. I can say.
  • the substrate 21 has a plurality of connection holes (not shown) penetratingly formed therein so that the lead portions of the power storage elements 40A to 40C and connector terminals (not shown) can be inserted and soldered.
  • the hole edge portion (vicinity) of the through hole 22 is a ground pattern connected to the ground potential.
  • the ground pattern (conductive path 23A) on the lower surface of the substrate 21 is formed in a range including the region of the head 53B (overlapped via the first shield case 12) of the screw 53, and the ground pattern (on the upper surface of the substrate 21 ( The conductive path 23B) is formed in a range including a region where the entire lower end surface (end portion) of the spacer portion 51 overlaps.
  • the ground pattern can be connected to the ground potential via, for example, a metal bracket fixed to the vehicle body.
  • the substrate 21 is not limited to the printed circuit board, but may be formed by stacking a bus bar made of a metal plate material such as copper or a copper alloy on the printed circuit board.
  • a connector 27 is fixed to the front end of the board 21, as shown in FIG.
  • the connector 27 includes a housing 27A that opens like a hood and a connector terminal (not shown) fixed to the housing 27A.
  • the connector terminal is soldered to a land connected to the conductive paths 23A and 23B of the board 21.
  • the plurality of power storage elements 40A to 40C can be used as an auxiliary power source for a vehicle, and are composed of, for example, an electric double layer capacitor, a lithium ion capacitor, a lithium ion secondary battery, etc. It has a cylindrical power storage body that is housed and a pair of positive and negative lead portions that are led out from one end surface 41A of the power storage body.
  • connection member 50 As shown in FIG. 3, the connection member 50 includes a spacer portion 51 and a plurality of (eight in this embodiment) screws 53 screwed to both ends of the spacer portion 51.
  • the spacer portion 51 is made of a cylindrical metal such as aluminum, aluminum alloy, iron, steel, and stainless steel, and is sandwiched between the top plate portion 17 and the substrate 21 of the second shield case 16, and the top plate portion 17 is provided.
  • the top plate portion 17 and the conductive path 23B of the substrate 21 are electrically connected to each other while maintaining the space between the substrate 21 and the substrate 21.
  • a through hole 52 penetrating in the axial direction is formed in the spacer portion 51, and a screw thread and a screw groove in which the shaft portion 53A of the screw 53 is screwed are formed on the inner wall of the through hole 52 at least on both end sides.
  • the spacer portion 51 has a function as a nut for screwing the screw 53.
  • the screw 53 is made of metal such as iron, stainless steel, steel, aluminum, and aluminum alloy, and has a shaft portion 53A having a thread and a thread groove formed on the outer periphery, and a head portion 53B having an outer diameter larger than that of the shaft portion 53A. Have.
  • the unit body 20 is formed by soldering the terminals of the electronic components 31, 32 and the like to the board 21 by, for example, reflow soldering or flow soldering.
  • the substrate 21 of the unit body 20 is placed on the first shield case 12, and the lower end of the spacer portion 51 is placed on the conductive path 23B at the edge of the through hole 22 at the corner of the substrate 21.
  • four screws 53 are screwed into each through hole 14 of the first shield case 12, and the second shield case 16 is put on the first shield case 12 and the unit main body 20 to make the second shield case.
  • Four screws 53 are screwed into each of the 16 through holes 18.
  • the electrical connection box 10 has conductive paths 23A and 23B, covers the substrate 21 on which the electronic components 31 and 32 are mounted, and the lower surface (one surface) of the substrate 21, and is electrically connected to the ground potential of the substrate 21.
  • the first shield case 12 electrically connected to the path 23A and the upper surface of the substrate 21 (the surface opposite to the one side) are arranged with a space (gap) capable of accommodating the electronic component 32 therebetween,
  • the second shield case 16 that covers the upper surface (opposite surface) of 21, and the first shield case 12 and the second shield case 16 are arranged so as to pass between the first shield case 12 and the second shield case 16.
  • an electrically conductive connecting member 50 for electrically connecting the same.
  • the second shield case 16 can be connected to the ground potential by the conductive connecting member 50 arranged so as to pass between the first shield case 12 and the second shield case 16. ..
  • the second shield case 16 can be connected to the ground potential without screwing the portion where the side surface of the first shield case connected to the ground potential and the second shield case overlap each other from the outside with a screw. Therefore, it is not always necessary to add the thicknesses of both the shield covers 12 and 16 and the thickness of the head portion of the screw 53, and the electric junction box 10 can be downsized.
  • the lower end portion (one end side) of the connecting member 50 is connected to the conductive path 23B of the substrate 21, and the upper end portion (other end side) of the connecting member 50 is connected to the second shield case 16.
  • the second shield case 16 can be connected to the ground potential with a simple structure.
  • the connecting member 50 also includes a spacer portion 51 sandwiched between the first shield case 12 and the second shield case 16. With this configuration, the strength of the second shield case can be increased while maintaining the space between the first shield case 12 and the second shield case 16 in addition to the electrical connection by the spacer portion 51. ..
  • the second embodiment uses a connecting member 60 having a metal collar 65 instead of the connecting member 50 of the first embodiment. Since other configurations are the same as those of the first embodiment, the same configurations as those of the first embodiment will be designated by the same reference numerals and the description thereof will be omitted.
  • the first shield case 12 and the second shield case 16 are connected by a connecting member 60.
  • the connection member 60 has a screw 61, a nut 64, and a metal collar 65.
  • the screw 61 has a thread portion and a thread groove formed on the outer peripheral surface, and has a shaft portion 62 and a head portion 53B having a longer axial length than the shaft portion 53A of the first embodiment.
  • the nut 64 has a thread and a thread groove formed on its inner peripheral surface.
  • the metal collar 65 is made of a cylindrical metal such as aluminum, aluminum alloy, iron, steel, and stainless, and has a through hole 66 formed in the axial direction.
  • the hole diameter of the through hole 66 is larger than the hole diameter of the through hole 52 of the spacer portion 51 of the first embodiment and the outer diameter of the shaft portion 62.
  • the shaft portion 62 of the screw 61 is inserted into the through hole 66 of the metal collar 65.
  • the metal collar 65 is sandwiched between the top plate portion 17 of the second shield case 16 and the conductive path 23B at the edge of the through hole 22 at the corner of the substrate 21.
  • the shaft portion 62 of the screw 61 is inserted into the cylindrical metal collar 65 of the connection member 60, it is not necessary to form a screw thread or a thread groove on the metal collar 65 (spacer portion). Therefore, the manufacturing cost can be reduced.
  • the connecting member 70 of the third embodiment is the one in which the metal collar 65 of the second embodiment is omitted. Since other configurations are the same as those in the second embodiment, the same configurations as those in the above-mentioned embodiment are denoted by the same reference numerals and the description thereof will be omitted.
  • connection members 50, 60, 70 are made of metal, but the invention is not limited to this. May be
  • the connecting members 50, 60, 70 are configured to be screwed to the shield cases 12, 16 with screws 53, 61, but the configuration is not limited to this.
  • a metal connecting member may be connected to the shield case by welding or the like.
  • the electrical connection box may not include the power storage elements 40A to 40C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

L'invention concerne une boîte de raccordement électrique 10 comprenant : un substrat 21 comportant des trajets conducteurs 23A et 23B, et sur lequel sont montés des composants électroniques 31 et 32 ; un premier boîtier de blindage 12 recouvrant une surface du substrat 21 et connecté électriquement aux trajets conducteurs 23A et 23B connectés à un potentiel de masse du substrat 21 ; un second boîtier de blindage 16 recouvrant une surface du substrat 21 sur le côté opposé à la première surface de celui-ci, un espace pour recevoir le composant électronique 32 étant présent par rapport à la surface opposée ; et un élément de connexion conducteur 50 disposé de façon à s'étendre entre le premier boîtier de blindage 12 et le second boîtier de blindage 16 pour assurer une connexion électrique entre le premier boîtier de blindage 12 et le second boîtier de blindage 16.
PCT/JP2020/004027 2019-02-22 2020-02-04 Boîte de raccordement électrique WO2020170793A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019030212A JP2020137323A (ja) 2019-02-22 2019-02-22 電気接続箱
JP2019-030212 2019-02-22

Publications (1)

Publication Number Publication Date
WO2020170793A1 true WO2020170793A1 (fr) 2020-08-27

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PCT/JP2020/004027 WO2020170793A1 (fr) 2019-02-22 2020-02-04 Boîte de raccordement électrique

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JP (1) JP2020137323A (fr)
WO (1) WO2020170793A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7478637B2 (ja) 2020-09-29 2024-05-07 ダイキョーニシカワ株式会社 電磁波遮蔽ボックス
JP2023040725A (ja) * 2021-09-10 2023-03-23 株式会社デンソー 電子装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018142571A (ja) * 2017-02-27 2018-09-13 株式会社オートネットワーク技術研究所 蓄電ユニット

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018142571A (ja) * 2017-02-27 2018-09-13 株式会社オートネットワーク技術研究所 蓄電ユニット

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Publication number Publication date
JP2020137323A (ja) 2020-08-31

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