WO2022168649A1 - Boîte de jonction électrique - Google Patents

Boîte de jonction électrique Download PDF

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Publication number
WO2022168649A1
WO2022168649A1 PCT/JP2022/002354 JP2022002354W WO2022168649A1 WO 2022168649 A1 WO2022168649 A1 WO 2022168649A1 JP 2022002354 W JP2022002354 W JP 2022002354W WO 2022168649 A1 WO2022168649 A1 WO 2022168649A1
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WO
WIPO (PCT)
Prior art keywords
dissimilar material
connection box
housing
material portion
relay
Prior art date
Application number
PCT/JP2022/002354
Other languages
English (en)
Japanese (ja)
Inventor
麻衣子 一色
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 WO2022168649A1 publication Critical patent/WO2022168649A1/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
    • H02G3/14—Fastening of cover or lid to 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
    • H02G3/02—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
    • H05K7/02—Arrangements of circuit components or wiring on supporting structure
    • H05K7/06—Arrangements of circuit components or wiring on supporting structure on insulating boards, e.g. wiring harnesses
    • 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

Definitions

  • the present invention relates to an electrical connection box that houses electronic components.
  • This application claims priority based on Japanese application No. 2021-16776 filed on February 4, 2021, and incorporates all the descriptions described in the Japanese application.
  • Vehicles have traditionally been equipped with electrical connection boxes containing electronic components such as relays.
  • Patent Document 1 discloses a relay having a contact that can be opened and closed and an excitation coil that switches between opening and closing of the contact.
  • a power supply device is disclosed in which a bus bar can be used both as a current path and as a heat radiation path.
  • An electrical junction box is an electrical junction box that includes a housing that houses an electronic component that generates heat during operation, and a bus bar that is connected to the electronic component.
  • the wall includes a dissimilar material portion having a better thermal conductivity than other portions, said dissimilar material portion being in contact with said busbar.
  • FIG. 1 is a perspective view showing an electrical junction box according to Embodiment 1;
  • FIG. FIG. 2 is a perspective view showing a state in which an upper case is omitted in the electrical connection box according to Embodiment 1;
  • FIG. 2 is a partial cross-sectional view taken along line III-III of FIG. 1;
  • 4 is an enlarged view showing an enlarged portion surrounded by a broken line in FIG. 3;
  • FIG. 4 is a cross-sectional view taken along line VV of FIG. 3;
  • FIG. FIG. 10 is a partial cross-sectional view for explaining the configuration of a dissimilar material portion in the electrical junction box according to Embodiment 2;
  • FIG. 10 is a partial cross-sectional view for explaining the configuration of a dissimilar material portion in the electrical junction box according to Embodiment 3;
  • a heat dissipation method there is a method of conducting air cooling by conducting heat generated by an electronic component to a housing that houses the electronic component, or a method of conducting cooling by conducting heat to an external device via the housing.
  • a heat transfer sheet is used to ensure heat conduction to the housing, and a so-called gap filler is applied to ensure contact between the housing and an external device.
  • An electrical junction box is an electrical junction box that includes a housing that houses an electronic component that generates heat during operation, and a bus bar that is connected to the electronic component, wherein the housing One wall of the body includes a dissimilar material portion having better thermal conductivity than the other portion, and the dissimilar material portion is in contact with the busbar.
  • the dissimilar material portion having a higher thermal conductivity than other portions is in contact with the bus bar, the heat generated by the electronic component is quickly transferred to the dissimilar material portion via the bus bar. , and the heat is more effectively radiated to the outside of the housing.
  • the dissimilar material portion is thicker than the other portion and has higher elasticity than the other portion.
  • the dissimilar material portion is thicker than the other portions and has high elasticity, it can be freely deformed and can absorb assembly tolerances.
  • the outer portion protruding to the outside of the accommodation housing is wider toward the projecting point than the other portion.
  • the outer portion of the dissimilar material portion is widened toward the projecting end, the distal end surface of the outer portion can be widened, and the heat dissipation effect can be enhanced.
  • the inner portion protruding toward the inside of the accommodation housing is wider toward the projecting point than the other portion.
  • the tip surface of the inner portion can be widened, and the contact surface with the bus bar can be widened. can.
  • the heterogeneous material section includes elastomer, silicon, or acrylic.
  • the dissimilar material portion includes a material with good thermal conductivity and high elasticity, such as elastomer, silicon or acrylic.
  • the different material portion is integrally formed with the other portion.
  • the dissimilar material portion is integrally formed with the other portion by a technique such as two-color molding, casting molding, or insert molding. Therefore, it is possible to improve the productivity of such an electric connection box.
  • an electrical connection box that houses, for example, a relay as an electronic component.
  • FIG. 1 is a perspective view showing an electrical junction box 100 according to Embodiment 1.
  • the electrical connection box 100 includes a housing housing 50 that houses electronic components.
  • the accommodation housing 50 is made of metal or resin, for example, and accommodates the relay 10 described later.
  • the electric junction box 100 is attached to the outside of a battery pack 200 of an EV (Electric Vehicle), for example (see FIG. 4).
  • EV Electric Vehicle
  • FIG. 2 is a perspective view showing a state in which the upper case 51 is omitted in the electric junction box 100 according to Embodiment 1
  • FIG. 3 is a partial cross-sectional view taken along line III-III in FIG. 1
  • FIG. 3 is an enlarged view showing a portion surrounded by a broken line in FIG. 3
  • FIG. 5 is a cross-sectional view taken along line VV in FIG.
  • the battery pack 200 is indicated by a dashed line for convenience of explanation.
  • the housing housing 50 is composed of an upper case 51 to which the relay 10 is fixed and a lower case 52 covered by the upper case 51, which will be described later. Electrical connection box 100 is attached so that bottom plate 521 of lower case 52 contacts battery pack 200 .
  • the relay 10 is fixed to the ceiling plate 513 of the upper case 51 as described later.
  • Bus bars 11 a and 11 b are provided in the vicinity of the inner surface 523 of the bottom plate 521 (one wall) of the lower case 52 facing the ceiling plate 513 . Portions of busbars 11 a and 11 b are interposed between relay 10 and inner surface 523 .
  • the busbars 11a and 11b are also referred to as the busbar 11 for convenience.
  • the relay 10 is switched to the ON state when the vehicle is running, and is switched to the OFF state when the vehicle is not running.
  • Relay 10 has a rectangular parallelepiped box shape, and one surface 102 of relay 10 is provided so as to face bus bar 11 (inner surface 523 of bottom plate 521).
  • the relay 10 has four side surfaces that rise vertically from the four edges of one surface 102, and one of the side surfaces 107 is provided with a terminal 101 as will be described later. That is, the relay 10 is provided such that the one surface 102 faces the inner side surface 523 and the side surface 107 intersects the inner side surface 523 .
  • the side surface 107 is a rectangle whose longitudinal direction is the facing direction of the ceiling plate 513 and the bottom plate 521 (hereinafter referred to as the vertical direction).
  • Two terminals 101 are provided on the side surface 107 .
  • the two terminals 101 are arranged side by side in a direction crossing the vertical direction (hereinafter referred to as the horizontal direction).
  • Two terminals 101 are connected to the bus bar 11 . Only one terminal 101 is shown in FIG.
  • Each terminal 101 has a cylindrical shape, most of which is embedded inside the relay 10 and only one end is exposed on the side surface 107 .
  • a screw thread is formed on the inner surface of each terminal 101, and the terminal 101 is screwed with a bolt 105 (see FIGS. 3 and 5).
  • a partition plate 103 rising from the side surface 107 is provided between the two terminals 101 on the side surface 107 of the relay 10 .
  • Two terminals 101 are separated by a partition plate 103 .
  • the partition plate 103 is substantially strip-shaped and extends in the vertical direction.
  • two connecting pieces 106 are provided on one surface 102 and the other surface 104 on the opposite side (see FIG. 2).
  • the connecting piece 106 is connected to two opposite edges on the other surface 104 .
  • Two connecting pieces 106 are provided diagonally to each other and extend along the other side 104 from such edges of the other side 104 .
  • a through hole 108 is formed in the connecting piece 106 so as to penetrate the connecting piece 106 in the vertical direction.
  • the relay 10 is fixed to the upper case 51 by inserting a bolt (not shown) through the through hole 108 and screwing it into a screw hole provided in the ceiling plate 513 of the upper case 51 , for example.
  • the bus bar 11 is made of, for example, a highly conductive metal plate. Of the two terminals 101 of the relay 10, one terminal 101 is connected to the bus bar 11a, and the other terminal 101 is connected to the bus bar 11b.
  • the bus bar 11 a has a flat portion 111 a facing the one surface 102 of the relay 10 and the inner surface 523 of the bottom plate 521 .
  • a contact portion 112a and a fixing portion 113a extending in the vertical direction are connected to two opposing edges of the flat portion 111a.
  • the contact portion 112 a is rectangular with the vertical direction as its longitudinal direction, and is provided near the side surface 107 of the relay 10 .
  • the contact portion 112a extends along the side surface 107 and has a through hole 114 formed substantially in the center.
  • the fixed portion 113a has an end bent parallel to the bottom plate 521, and a through hole 115a (see FIG. 2) is formed in the end.
  • the fixing portion 113a is fixed to the lower case 52 using the through hole 115a.
  • the busbar 11b has a flat portion 111b facing the inner surface 523 of the bottom plate 521.
  • a contact portion 112b and a fixing portion 113b extending in the vertical direction are connected to two opposing edges of the flat portion 111b.
  • the contact portion 112b has a rectangular shape whose longitudinal direction is the vertical direction, and is provided in the vicinity of the side surface 107 of the relay 10.
  • the contact portion 112b extends along the side surface 107 and has a through hole (not shown) formed substantially in the center.
  • the contact portion 112b (bus bar 11b) is fixed and electrically connected to the other terminal 101 by inserting the bolt 105 through the through hole and screwing the other terminal 101 (see FIG. 5).
  • the end portion of the fixing portion 113b is bent parallel to the bottom plate 521, and a through hole 115b (see FIG. 2) is formed in the end portion.
  • the fixing portion 113b is fixed to the lower case 52 using the through hole 115b.
  • the ceiling plate 513 of the upper case 51 is provided with a pressing portion 13 that presses the busbar 11 toward the bottom plate 521 side.
  • the pressing portion 13 extends vertically from the ceiling plate 513 and presses the flat portion 111a of the busbar 11a and the flat portion 111b of the busbar 11b against the bottom plate 521 side.
  • the pressing portion 13 is integrally formed with the upper case 51, and when the assembly of the electric connection box 100 is completed, the tip of the pressing portion 13 is always in contact with the flat portions 111a and 111b, and the busbars 11a and 11b are placed on the bottom plate 521 side. impose.
  • relay 10 generates a lot of heat during operation. Such heat adversely affects the electrical parts around the relay 10 and may cause malfunction of the electrical parts, so it is necessary to dissipate the heat.
  • a method of dissipating the heat generated by the relay 10 a method of conducting air cooling by conducting the heat generated by the relay 10 to the housing housing via the bus bar or a method of conducting cooling by conducting it to an external cooling mechanism is adopted.
  • a heat transfer sheet is interposed between the busbar and the housing to ensure contact between the busbar and the housing, or a heat transfer sheet is interposed between the housing and the housing.
  • a so-called gap filler is generally applied between the housing and the external cooling mechanism.
  • the electrical connection box 100 according to Embodiment 1 can dissipate the heat generated by the relay 10 quickly and appropriately with a simple configuration. A detailed description will be given below.
  • the bottom plate 521 of the lower case 52 includes the dissimilar material portion 53 with good thermal conductivity.
  • the dissimilar material portion 53 has better thermal conductivity than other portions other than the dissimilar material portion 53 .
  • the dissimilar material portion 53 has higher elasticity than other portions.
  • the dissimilar material portion 53 is a plate-shaped portion, and is provided at a position corresponding to the flat portion 111a of the busbar 11a and the flat portion 111b of the busbar 11b in the vertical direction. That is, the dissimilar material portion 53 has a shape that follows the flat portions 111a and 111b when viewed in the vertical direction. The thickness of the dissimilar material portion 53 in the vertical direction is thicker than other portions of the bottom plate 521 . The dissimilar material portion 53 is in contact with the flat portions 111a and 111b.
  • the dissimilar material portion 53 includes an inner portion 531 protruding toward the inside of the accommodation housing 50, i.e., toward the busbar 11 side, and an outer portion protruding toward the outside of the accommodation housing 50 relative to other portions. 532.
  • a tip surface of the inner portion 531 is in contact with one surface of the flat portions 111a and 111b. Also, the tip surface of the outer portion 532 contacts the battery pack 200 of the EV.
  • the dissimilar material part 53 is made of a different material that has better thermal conductivity and higher elasticity than other parts of the bottom plate 521 .
  • the dissimilar material portion 53 is mainly composed of elastomer, silicon or acrylic.
  • the dissimilar material portion 53 is integrally formed with other portions by a technique such as two-color molding, casting molding, or insert molding. Therefore, the manufacturing process of the electric connection box 100 can be simplified, and productivity can be improved.
  • the heat generated by the relay 10 is quickly conducted to the busbars 11a and 11b via the bolts 105, and the heat is transferred from the busbars 11a and 11b to the inner part. It is conducted to the dissimilar material portion 53 via 531 .
  • the dissimilar material portion 53 has a higher thermal conductivity than other portions, part of the heat transferred to the dissimilar material portion 53 is preferentially conducted to the outer battery pack 200 via the outer portion 532 . and cooled by the cooling mechanism of battery pack 200 .
  • the rest of the heat transferred to the dissimilar material portion 53 is conducted to the bottom plate 521 of the lower case 52 and air-cooled through the outer surface of the bottom plate 521 .
  • the heat generated by the relay 10 can be quickly and appropriately dissipated with a simple configuration that omits the heat transfer sheet and gap filler. Therefore, productivity can be improved by simplifying the assembly process, and manufacturing costs can be lowered by reducing the number of parts.
  • the dissimilar material portion 53 has high elasticity, so that it can be freely deformed. Therefore, assembly tolerances can be absorbed.
  • the pressing portion 13 presses the busbars 11a and 11b (flat portions 111a and 111b) against the dissimilar material portion 53 (bottom plate 521) as described above. Therefore, since the close contact between the busbars 11a and 11b and the dissimilar material portion 53 can be reliably maintained, heat conduction from the busbars 11a and 11b to the dissimilar material portion 53 is properly performed.
  • bottom plate 521 includes one dissimilar material portion 53 .
  • the bottom plate 521 may be configured to have a plurality of dissimilar material portions 53 .
  • the present invention is not limited to this.
  • the ceiling plate 513 or other side wall plates may be used as long as they can contact with the busbar 11 .
  • the relay 10 is used as an example of an electronic component that generates heat during operation, but the electronic component is not limited to this.
  • the present invention can also be applied to other electronic components such as semiconductor switches.
  • FIG. 6 is a partial cross-sectional view for explaining the configuration of the dissimilar material portion 53 in the electrical connection box 100 according to the second embodiment.
  • the battery pack 200 is indicated by a dashed line for convenience of explanation.
  • the electrical connection box 100 includes the housing housing 50 composed of the upper case 51 and the lower case 52, as in the first embodiment. is provided. A portion of busbar 11 is interposed between relay 10 and inner surface 523 . A pressing portion 13 that presses the busbar 11 toward the bottom plate 521 is projected from the upper case 51 .
  • the bottom plate 521 includes the dissimilar material portion 53A, and the dissimilar material portion 53A is vertically aligned with the flat portion 111a of the busbar 11a and the flat portion 111b of the busbar 11b. provided at corresponding positions.
  • the dissimilar material portion 53A has an inner portion 531A that protrudes further inside the accommodation housing 50 than other portions, and an outer portion 532A that protrudes further outside the accommodation housing 50 than other portions. A tip surface of the inner portion 531A is in contact with one surface of the flat portions 111a and 111b.
  • the outer portion 532A widens toward the projecting end. That is, the dimension of the outer portion 532A increases as it approaches the battery pack 200 of the EV projecting from.
  • the outer portion 532A has a substantially trapezoidal cross-sectional shape, as shown in FIG. A tip surface of outer portion 532A is in contact with battery pack 200 .
  • the tip surface of the outer portion 532A is wider. As a result, the contact area between the outer portion 532A and the battery pack 200 can be increased, so that the heat generated by the relay 10 can be dissipated more effectively.
  • the outer portion 532A widens toward the projecting end
  • the inner portion 531A may be configured to widen toward the projecting end.
  • FIG. 7 is a partial cross-sectional view for explaining the configuration of the dissimilar material portion 53 in the electrical junction box 100 according to Embodiment 3. As shown in FIG. In FIG. 7, the battery pack 200 is indicated by a dashed line for convenience of explanation.
  • the electric connection box 100 includes the housing housing 50 composed of the upper case 51 and the lower case 52, as in the first embodiment, and the busbar 11 is provided near the inner surface 523 of the bottom plate 521 of the lower case 52. is provided. A portion of busbar 11 is interposed between relay 10 and inner surface 523 . A pressing portion 13 that presses the busbar 11 toward the bottom plate 521 is projected from the upper case 51 .
  • the bottom plate 521 includes the dissimilar material portion 53B, and the dissimilar material portion 53B is vertically aligned with the flat portion 111a of the busbar 11a and the flat portion 111b of the busbar 11b. provided at corresponding positions.
  • the dissimilar material portion 53B has an inner portion 531B that protrudes further inside the accommodation housing 50 than other portions, and an outer portion 532B that protrudes further outside the accommodation housing 50 than other portions.
  • the outer portion 532B widens toward the projecting end. That is, the dimension of the outer portion 532B increases as it approaches the battery pack 200 of the EV projecting from.
  • the outer portion 532B has a substantially trapezoidal cross-sectional shape, as shown in FIG. A tip surface of outer portion 532 ⁇ /b>B is in contact with battery pack 200 .
  • the width of the inner portion 531B increases toward the projecting end. That is, the dimension of the inner portion 531B increases as it approaches the flat portion 111a of the busbar 11a and the flat portion 111b of the busbar 11b.
  • the inner portion 531B has a substantially inverted trapezoidal cross-sectional shape, as shown in FIG. The tip surface of the inner portion 531B is in contact with the flat portions 111a and 111b.
  • the tip surface of the outer portion 532B can be widened, the contact area between the outer portion 532B and the battery pack 200 can be increased, and the relay The heat generated in 10 can be dissipated more effectively.
  • the tip surface of the inner portion 531B can be widened.
  • the contact area between inner portion 531B and bus bar 11 can be increased, so that the heat generated by relay 10 can be more rapidly conducted to battery pack 200 side.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Connection Or Junction Boxes (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

L'invention concerne une boîte de jonction électrique qui peut libérer de la chaleur rapidement et correctement grâce à une configuration plus simple. Cette boîte de jonction électrique comprend un boîtier de réception destiné à recevoir un relais (10) qui génère de la chaleur pendant le fonctionnement, et des barres omnibus (11a, 11b) connectées au relais (10). Une plaque inférieure (521) du boîtier de réception comprend une partie de matériau différent (53) qui a une meilleure conductivité thermique que le reste du boîtier, et la partie de matériau différent (53) est en contact avec les barres omnibus (11a, 11b).
PCT/JP2022/002354 2021-02-04 2022-01-24 Boîte de jonction électrique WO2022168649A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-016776 2021-02-04
JP2021016776A JP2022119554A (ja) 2021-02-04 2021-02-04 電気接続箱

Publications (1)

Publication Number Publication Date
WO2022168649A1 true WO2022168649A1 (fr) 2022-08-11

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PCT/JP2022/002354 WO2022168649A1 (fr) 2021-02-04 2022-01-24 Boîte de jonction électrique

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JP (1) JP2022119554A (fr)
WO (1) WO2022168649A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03235610A (ja) * 1990-02-09 1991-10-21 Furukawa Electric Co Ltd:The 自動車用電気接続箱
JP2006325352A (ja) * 2005-05-20 2006-11-30 Auto Network Gijutsu Kenkyusho:Kk 電気接続箱
JP2010103372A (ja) * 2008-10-24 2010-05-06 Keihin Corp 電子制御装置
JP2012165567A (ja) * 2011-02-07 2012-08-30 Auto Network Gijutsu Kenkyusho:Kk 電気接続箱
JP2014123645A (ja) * 2012-12-21 2014-07-03 Sharp Corp 電子機器
WO2018105610A1 (fr) * 2016-12-05 2018-06-14 トヨタ自動車株式会社 Unité de relais

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03235610A (ja) * 1990-02-09 1991-10-21 Furukawa Electric Co Ltd:The 自動車用電気接続箱
JP2006325352A (ja) * 2005-05-20 2006-11-30 Auto Network Gijutsu Kenkyusho:Kk 電気接続箱
JP2010103372A (ja) * 2008-10-24 2010-05-06 Keihin Corp 電子制御装置
JP2012165567A (ja) * 2011-02-07 2012-08-30 Auto Network Gijutsu Kenkyusho:Kk 電気接続箱
JP2014123645A (ja) * 2012-12-21 2014-07-03 Sharp Corp 電子機器
WO2018105610A1 (fr) * 2016-12-05 2018-06-14 トヨタ自動車株式会社 Unité de relais

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