Electrical junction boxes and wire harnesses

Abstract

To appropriately secure cooling performance.SOLUTION: An electric connection box 10 comprises: a heating component 11; a cooling part 12 which cools the heating component 11; and a resin housing 13 which holds the heating component 11 and the cooling part 12. The cooling part 12 comprises: a metal plate 5 which is formed in a shape along a shape of a bus bar 3 of the heating component 11; a metal pipe 6 which is arranged by contacting the metal plate 5 along the metal plate 5 and to which coolant is distributed; and a heat transfer material 4 which has insulation quality and is interposed between the heating component 11 and the metal plate 5.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an electrical junction box and a wire harness. [Background technology]

[0002] For example, Patent Document 1 discloses a conventional configuration including a relay and a bus bar as heat-generating components, a cooling member for cooling the relay and the bus bar, and a resin case that serves as a heat dissipation body for holding the relay, the bus bar, and the cooling member. The cooling member is formed by pressing a metal plate into a substantially L-shape. A resin heat-conducting member is provided between the cooling member and the bottom surface of the case.

[0003] Furthermore, for example, Patent Document 2 discloses a conventional configuration including a relay and a bus bar as heat-generating components, a heat transfer member that cools the bus bar, and a housing that holds the relay, the bus bar, and the heat transfer member. The bus bar has a first portion and a third portion that extend in the same direction, and a second portion that extends vertically between them, forming a substantially Z-shape. The first portion is connected to the relay, and the third portion is connected to the heat transfer member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2021-052189 [Patent Document 2] Japanese Patent Publication No. 2020-127302 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, in order to improve cooling performance, it is possible to increase the capacity of the cooling members and heat transfer members described above, but this would increase the weight and size, and there is room for further improvement.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric junction box and a wire harness that can ensure proper cooling performance. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the electrical connection box of the present invention comprises a heat-generating component, a cooling section that cools the heat-generating component, and a resin housing that holds the heat-generating component and the cooling section, and the cooling section includes a metal plate formed to a shape that follows the shape of the heat-generating component, metal piping that is arranged along and in contact with the metal plate and through which a refrigerant flows, and a heat transfer material that is insulating and is interposed between the heat-generating component and the metal plate.

[0008] In order to achieve the above object, the wire harness of the present invention comprises a conductive wiring material and an electrical connection box electrically connected to the wiring material, wherein the electrical connection box comprises a heat-generating component, a cooling section that cools the heat-generating component, and a resin housing that holds the heat-generating component and the cooling section, and the cooling section comprises a metal plate formed to a shape that conforms to the shape of the heat-generating component, metal piping that is arranged along the metal plate in contact with the metal plate and through which a refrigerant flows, and a heat transfer material that is insulating and is interposed between the heat-generating component and the metal plate. [Effects of the Invention]

[0009] The electrical junction box and the wire harness according to the present invention can ensure proper cooling performance. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of an electrical junction box and a wire harness according to an embodiment. [Figure 2] FIG. 2 is a plan view of the electrical junction box according to the embodiment. [Figure 3] FIG. 3 is a perspective view of the electrical junction box according to the embodiment, with the resin housing removed. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line BB in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially the same.

[0012] In the following description, the three intersecting directions are conveniently referred to as the "length direction (first direction) X," the "width direction (second direction) Y," and the "height direction (third direction) Z." Here, the length direction X, the width direction Y, and the height direction Z are perpendicular to one another. Typically, the length direction X and the width direction Y correspond to horizontal directions (also referred to as planar directions). Typically, the length direction X corresponds to the long side direction of the electrical junction box 10, and the width direction Y corresponds to the short side direction of the electrical junction box 10. Typically, the height direction Z corresponds to the vertical direction, and the vertically upward direction is referred to as the upper part or upper side, and the vertically downward direction is referred to as the lower part or lower side.

[0013] The electrical junction box 10 of the embodiment is mounted on a vehicle such as an automobile, and is incorporated into a wire harness WH as shown in FIG. 1 . The wire harness WH is configured to connect a plurality of wiring materials W used for power supply and signal communication to each device mounted on the vehicle using connectors or the like, for example, to connect the devices. The wire harness WH includes a conductive wiring material W and an electrical junction box 10 electrically connected to the wiring material W. The wiring material W is configured, for example, by a metal rod, an electric wire, a bundle of electric wires, etc. The metal rod is a conductive rod-shaped member whose outside is covered with an insulating coating. The electric wire is a conductor portion (core wire) made of a plurality of conductive metal wires whose outside is covered with an insulating coating. The wire harness WH may further include a grommet, a protector, a fixing device, etc.

[0014] The electrical junction box 10 houses electronic components such as connectors, fuses, relays, capacitors, branches, electronic control units, and electronic component units that combine these components. The electrical junction box 10 is installed, for example, in the engine compartment or passenger compartment of a vehicle. The electrical junction box 10 is connected between a power source such as a battery and various electronic devices installed in the vehicle via wiring material W or the like. The electrical junction box 10 distributes power supplied from the power source to the various electronic devices in the vehicle. The electrical junction box 10 may also be called a junction box, fuse box, relay box, etc., but in this embodiment, these are collectively referred to as an electrical junction box. Note that each drawing schematically illustrates a portion of the electrical junction box 10.

[0015] As shown in FIGS. 1 to 5, the electrical junction box 10 of the embodiment includes a heat-generating component 11, a cooling section 12, and a resin housing 13.

[0016] The heat-generating component 11 is a component that generates heat when current is applied. In this embodiment, the heat-generating component 11 is a relay 2 and a bus bar 3. The heat-generating component 11 may also be an electronic component such as a connector, a fuse, a capacitor, a branching section, an electronic control unit, or an electronic component unit that combines these components.

[0017] The cooling section 12 cools the heat-generating component 11. The cooling section 12 includes a heat transfer material 4, a metal plate 5, and a metal pipe 6.

[0018] The resin housing 13 holds the heat-generating component 11 and the cooling unit 12 .

[0019] The details of the electrical junction box 10 will be described below.

[0020] 1 and 2, resin housing 13 is made of insulating synthetic resin. Resin housing 13 has a base portion 13a, one end portion 13b, and the other end portion 13c.

[0021] The base 13a is formed in a plate shape so as to have a predetermined width in the width direction Y, a predetermined length in the length direction X, and a constant height in the height direction Z in both the width direction Y and the length direction X. The base 13a has, on its upper surface in the height direction Z, a flat upper surface 13aa that is aligned along the plane formed by the width direction Y and the length direction X.

[0022] The one end 13b is provided on one side of the base 13a in the length direction X. The one end 13b is integrally formed on one side of the base 13a in the length direction X. The one end 13b is formed on one side of the base 13a in the length direction X so that the width dimension of the base 13a in the width direction Y is the same as that of the base 13a, but the height dimension in the height direction Z is larger. Specifically, the one end 13b rises upward from the upper surface 13aa of the base 13a and has a flat vertical surface 13ba along a vertical plane formed by the width direction Y and the height direction Z. The one end 13b also has a top surface 13bb that is continuous with the upper end of the vertical surface 13ba and parallel to the upper surface 13aa of the base 13a. Therefore, the one end 13b forms a step that protrudes upward in the height direction Z on one side of the length direction X of the base 13a. The one end 13b also has a notch 13bc that is recessed downward in the height direction Z on the top surface 13bb.

[0023] The other end 13c is provided on the other side of the base 13a in the length direction X. The other end 13c is integrally formed with the other side of the base 13a in the length direction X. The other end 13c is formed on the other side of the base 13a in the length direction X so that its width dimension in the width direction Y of the base 13a is the same as that of the base 13a, but its height dimension in the height direction Z is larger. Specifically, the other end 13c has a slope 13ca that rises obliquely upward from the upper surface 13aa of the base 13a. The other end 13c also has a top surface 13cb that is continuous with the upper end of the slope 13ca and parallel to the upper surface 13aa of the base 13a. Therefore, the one end 13b forms a step that protrudes upward in the height direction Z on the other side of the length direction X of the base 13a. The other end 13c also has a notch 13cc that is recessed downward in the height direction Z on the top surface 13cb.

[0024] As shown in FIGS. 1 and 2, the relay 2 of the heat-generating component 11 is disposed on an upper surface 13aa of the base portion 13a of the resin housing 13, and is fixed to the resin housing 13 with a bolt 8.

[0025] As shown in FIGS. 1 and 2, the bus bar 3 of the heat-generating component 11 has a first bus bar 3A and a second bus bar 3B which are connected to the relays 2 independently of each other.

[0026] The first bus bar 3A is provided to span from the base 13a to the one end 13b of the resin housing 13. The first bus bar 3A is formed in a plate shape and is formed by bending using sheet metal or pressing so as to be arranged along the upper surface 13aa of the base 13a, the vertical surface 13ba of the one end 13b, and the top surface 13bb of the one end 13b. Specifically, the first bus bar 3A is continuously composed of a connection portion 3Aa that is along the upper surface 13aa of the base 13a and connected to the relay 2, an intermediate portion 3Ab that is along the vertical surface 13ba of the one end 13b, and a connection portion 3Ac that is along the top surface 13bb of the one end 13b and connected to the wiring material W. The connection portion 3Ac is arranged in a notch 13bc of the one end 13b, and a screw hole 3Ad is formed therein for fixing one wiring material W for conductive connection.

[0027] The second bus bar 3B is provided to span from the base 13a to the other end 13c of the resin housing 13. The second bus bar 3B is formed in a plate shape and is formed by bending using sheet metal or pressing so as to be disposed along the upper surface 13aa of the base 13a, the slope 13ca of the other end 13c, and the top surface 13cb of the other end 13c. Specifically, the second bus bar 3B is continuously configured with a connection portion 3Ba that is located along the upper surface 13aa of the base 13a and connected to the relay 2, an intermediate portion 3Bb that is located along the slope 13ca of the other end 13c, and a connection portion 3Bc that is located along the top surface 13cb of the other end 13c and connected to the wiring material W. The connection portion 3Bc is disposed in a notch 13cc of the other end 13c, and a screw hole 3Bd is formed therein for fixing the other wiring material W for conductive connection. As shown in FIGS. 2 and 5, in this embodiment, the second bus bar 3B is formed so that its width dimension W3B in the width direction Y is the same as the width dimension W3A in the width direction Y of the first bus bar 3A.

[0028] The heat transfer material 4 of the cooling section 12 has insulating properties. As shown in Figures 1 to 5, the heat transfer material 4 has a first heat transfer material 4A in contact with the first bus bar 3A and a second heat transfer material 4B in contact with the second bus bar 3B.

[0029] The first heat transfer material 4A is provided to bridge from the base portion 13a to the one end portion 13b of the resin casing 13. The first heat transfer material 4A is formed in a plate shape so as to overlap the first bus bar 3A and is formed by bending it to fit along the connecting portion 3Aa and the middle portion 3Ab. Specifically, the first heat transfer material 4A is continuously configured with a flat portion 4Aa that overlaps and contacts the connecting portion 3Aa and a rising portion 4Ab that overlaps and contacts the middle portion 3Ab. The first heat transfer material 4A is embedded in the base portion 13a of the resin casing 13 so that the plate surface of the flat portion 4Aa is flush with the upper surface 13aa of the base portion 13a, and the plate surface of the rising portion 4Ab is embedded in the one end portion 13b so that it is flush with the vertical surface 13ba of the one end portion 13b, and each plate surface faces and contacts the plate surface of the first bus bar 3A. As shown in FIGS. 2 and 5, in this embodiment, the first heat transfer material 4A is formed so that its width dimension W4A in the width direction Y is larger than the width dimension W3A in the width direction Y of the first bus bar 3A.

[0030] Further, the first heat transfer material 4A has notches 4Ae formed at its ends in the width direction Y. The notches 4Ae are provided opposite each other in the width direction Y. The notches 4Ae are provided in the rising portions 4Ab of the first heat transfer material 4A. The first heat transfer material 4A is formed such that its width dimension W4A in the width direction Y is narrowed to a width dimension W4A' by the opposing notches 4Ae. The narrowed width dimension W4A' of the first heat transfer material 4A by the notches 4Ae is smaller than the width dimension W3A of the first bus bar 3A in the width direction Y. Further, the resin member 13e of the resin casing 13 enters and fits into the notches 4Ae. The resin member 13e fitted into the notches 4Ae comes into contact with the plate surface of the first bus bar 3A because the narrowed width dimension W4A' of the first heat transfer material 4A by the notches 4Ae is smaller than the width dimension W3A of the first bus bar 3A in the width direction Y.

[0031] The second heat transfer material 4B is provided to bridge from the base portion 13a to the other end portion 13c of the resin casing 13. The second heat transfer material 4B is formed in a plate shape so as to overlap the second bus bar 3B and is bent to fit along the connecting portion 3Ba and the middle portion 3Bb. Specifically, the second heat transfer material 4B is configured to have a flat portion 4Ba that overlaps and contacts the connecting portion 3Ba and a sloping portion 4Bb that overlaps and contacts the middle portion 3Bb, which are continuous. The second heat transfer material 4B is embedded in the base portion 13a of the resin casing 13 so that the plate surface of the flat portion 4Ba is flush with the upper surface 13aa of the base portion 13a, and the plate surface of the sloping portion 4Bb is embedded in the other end portion 13c so that it is flush with the slope 13ca of the other end portion 13c, and both plate surfaces face and contact the plate surface of the second bus bar 3B. As shown in FIGS. 2 and 5, in this embodiment, the second heat transfer material 4B is formed so that its width dimension W4B in the width direction Y is larger than the width dimension W3B in the width direction Y of the second bus bar 3B.

[0032] Further, the second heat transfer material 4B has a notch 4Be formed at an end in the width direction Y. The notches 4Be are provided opposite each other in the width direction Y. The notches 4Be are provided in a flat portion 4Ba and an inclined portion 4Bb of the second heat transfer material 4B. The second heat transfer material 4B is formed such that its width dimension W4B in the width direction Y is narrowed to a width dimension W4B' by the opposing notches 4Be. The narrowed width dimension W4B' of the second heat transfer material 4B by the notches 4Be is smaller than the width dimension W3B of the second bus bar 3B in the width direction Y. Further, the resin member 13e of the resin casing 13 enters and fits into the notch 4Be. The resin member 13e that fits into the notch 4Be comes into contact with the plate surface of the second bus bar 3B because the narrowed width dimension W4B' of the second heat transfer material 4B by the notches 4Be is smaller than the width dimension W3B of the second bus bar 3B in the width direction Y.

[0033] As shown in FIGS. 2 to 5 , the metal plate 5 of the cooling unit 12 is formed into a plate shape so as to overlap the heat transfer material 4, and is formed by bending the metal plate 5 using a sheet metal cutting machine or a press. The metal plate 5 contacts the plate surface of the heat transfer material 4. Specifically, the metal plate 5 is continuously configured with a flat portion 5a that follows the flat portion 4Aa of the first heat transfer material 4A and the flat portion 4Ba of the second heat transfer material 4B, a rising portion 5b that follows the rising portion 4Ab of the first heat transfer material 4A, and an inclined portion 5c that follows the inclined portion 4Bb of the second heat transfer material 4B. The metal plate 5 has a bending portion 5f formed at the boundary between the first heat transfer material 4A and the second heat transfer material 4B so as to be spaced apart from the heat transfer material 4. As shown in FIGS. 2 and 5 , in this embodiment, the width dimension W5 of the metal plate 5 in the width direction Y is formed to be the same as the width dimensions W4A and W4B of the heat transfer material 4 in the width direction Y.

[0034] Therefore, the metal plate 5 is formed into a shape that follows the shape of the bus bars 3 (first bus bar 3A and second bus bar 3B) that are heat-generating components 11, via the heat transfer materials 4 (first heat transfer material 4A and second heat transfer material 4B). The heat transfer materials 4 (first heat transfer material 4A and second heat transfer material 4B) are interposed between the metal plate 5 and the bus bars 3 (first bus bar 3A and second bus bar 3B) that are heat-generating components 11.

[0035] Furthermore, the metal plate 5 has a notch 5e formed at an end in the width direction Y. The notch 5e is formed in the same arrangement and shape as the notches 4Ae and 4Be of the heat transfer material 4 so as to overlap and match in the height direction Z. The notches 5e are provided opposite each other in the width direction Y. The metal plate 5 is formed such that the width dimension W5 in the width direction Y is narrowed to a width dimension W5' by the opposing notches 5e. The width dimension W5' narrowed by the notches 5e of the metal plate 5 is the same as the narrowed width dimensions W4A' and W4B' of the heat transfer material 4 and is smaller than the width dimensions W3A and W3B of the bus bar 3 in the width direction Y. Furthermore, a resin member 13e of the resin housing 13 fits into the notch 5e. Resin member 13e fitted into notch 5e comes into contact with the plate surface of busbar 3 because width dimensions W4A', W4B' of heat transfer material 4 constricted by notch 5e are smaller than width dimensions W3A, W3B of busbar 3 in the width direction Y.

[0036] As shown in FIGS. 1 to 5, the metal pipe 6 of the cooling part 12 is formed in a tubular shape and has a base 6a and connection ends 6b, 6c at both ends of the base 6a.

[0037] The base 6a extends mainly along the longitudinal direction X, is disposed along the metal plate 5, and is disposed opposite to and facing the bus bars 3 (first bus bar 3A and second bus bar 3B). Specifically, as shown in FIG. 4, the base 6a is formed by bending it so as to follow the flat portion 5a, the rising portion 5b, and the inclined portion 5c of the metal plate 5. The base 6a is embedded inside the resin housing 13. The base 6a also has a flat portion 6d formed thereon that faces and contacts the plate surface of the metal plate 5. The flat portion 6d may be formed on at least one surface facing the plate surface of the metal plate 5, and may also be formed on another surface. The metal pipe 6 has a bent portion 6f formed at the boundary between the first heat transfer material 4A and the second heat transfer material 4B so as to be spaced apart from the metal plate 5. As shown in Figures 2 and 5, in this embodiment, the width dimension W6 of the metal pipe 6 (base 6a) in the width direction Y is smaller than the width dimensions W4A, W4B of the heat transfer material 4 in the width direction Y and the width dimension W5 of the metal plate 5.

[0038] The connection ends 6b, 6c are bent from each end of the base 6a in the width direction Y and extend outside the resin housing 13. Although not shown in the figures, the connection ends 6b, 6c are connected to a refrigerant flow path that supplies a refrigerant to one of the connection ends 6b, 6c and collects it from the other. Thus, a refrigerant flows through the metal pipe 6. Examples of the refrigerant include air, water, and antifreeze (long life coolant: LLC).

[0039] As described above, the electrical connection box 10 of the embodiment includes a heat-generating component 11, a cooling section 12 that cools the heat-generating component 11, and a resin housing 13 that holds the heat-generating component 11 and the cooling section 12. The cooling section 12 includes a metal plate 5 that is formed to a shape that follows the shape of the bus bar 3 of the heat-generating component 11, a metal pipe 6 that is arranged along and in contact with the metal plate 5 and through which a refrigerant flows, and a heat transfer material 4 that is insulating and is interposed between the heat-generating component 11 and the metal plate 5.

[0040] In addition, the wire harness WH of the embodiment includes a conductive wiring material W and an electrical connection box 10 electrically connected to the wiring material W, and the electrical connection box 10 includes a heat-generating component 11, a cooling section 12 that cools the heat-generating component 11, and a resin housing 13 that holds the heat-generating component 11 and the cooling section 12, and the cooling section 12 includes a metal plate 5 formed in a shape that follows the shape of the bus bar 3 of the heat-generating component 11, a metal piping 6 that is arranged along the metal plate 5 in contact with the metal plate 5 and through which a refrigerant flows, and a heat transfer material 4 that is insulating and is interposed between the heat-generating component 11 and the metal plate 5.

[0041] In this electrical junction box 10 and wire harness WH, heat generated by the heat-generating component 11 is transferred to the metal plate 5, which has a shape that follows the shape of the bus bar 3 of the heat-generating component 11, and is further cooled by the refrigerant that flows through the metal pipes 6 that contact the metal plate 5. In addition, in this electrical junction box 10 and wire harness WH, heat is transferred from the heat-generating component 11 to the metal plate 5 while insulation is ensured by the heat transfer material 4 between the heat-generating component 11 and the metal plate 5. Therefore, the electric junction box 10 and wire harness WH of the embodiment can be made smaller and lighter without increasing the capacity of the metal plate 5, while improving cooling performance.

[0042] In addition, in the embodiment of the electrical connection box 10 and the wire harness WH, the cooling section 12 has notches 4Ae and 4Be provided in the heat transfer material 4, and the resin housing 13 has a resin member 13e that fits into the notches 4Ae and 4Be of the heat transfer material 4 and is provided in contact with the bus bar 3 of the heat-generating component 11.

[0043] According to this electrical connection box 10 and wire harness WH, the resin member 13e of the resin housing 13 fits into the notches 4Ae, 4Be of the heat transfer material 4 and comes into contact with the bus bar 3 of the heat-generating component 11, thereby maintaining the amount of compression of the heat transfer material 4 in the plate thickness direction (height direction Z), thereby ensuring the insulation distance between the metal plate 5 and the heat-generating component 11.

[0044] In addition, in the embodiment of the electrical connection box 10 and the wire harness WH, the cooling section 12 has a notch 5e in the metal plate 5 that coincides with the notches 4Ae, 4Be of the heat transfer material 4, and the resin housing 13 has a resin member 13e that also fits into the notch 5e of the metal plate 5.

[0045] According to the electrical junction box 10 and the wire harness WH, by providing the metal plate 5 with notches 5e that coincide with the notches 4Ae, 4Be of the heat transfer material 4, the heat transfer material 4 and the metal plate 5 can be stacked and the notches 4Ae, 4Be, 5e can be machined together, making manufacturing easier. Moreover, according to the electrical junction box 10, by fitting the resin member 13e into the notch 5e of the metal plate 5 as well, the position of the metal plate 5 in the width direction Y and the length direction X can be regulated.

[0046] In the electric junction box 10 and the wire harness WH of the embodiment, the metal pipe 6 has a flat portion 6d that faces the plate surface of the metal plate 5 and is in contact with the plate surface of the metal plate 5.

[0047] According to this electrical connection box 10 and wire harness WH, the flat portion 6d that faces and contacts the plate surface of the metal plate 5 increases the contact area between the metal plate 5 and the metal piping 6, thereby improving heat transfer and cooling performance.

[0048] The electrical junction box 10 and the wire harness WH according to the embodiment of the present invention described above are not limited to the above-described embodiment, and various modifications are possible within the scope of the claims. Furthermore, the electrical junction box 10 and the wire harness WH according to this embodiment may be configured by appropriately combining the components of the embodiment and modified examples described above. [Explanation of symbols]

[0049] 10 Electrical junction box 11 Heat-generating components (2 relays, 3 bus bars) 12 Cooling section 4 Heat transfer materials 4Ae, 4Be notch 5 metal plate 5e Notch 6 Metal piping 6d flat part 13 Resin housing 13e Resin parts W Routing material WH Wire Harness

Claims

1. A heat-generating component; a cooling unit that cools the heat-generating component; a resin housing that holds the heat-generating component and the cooling unit; Equipped with the cooling unit includes a metal plate formed into a shape that follows the shape of the heat-generating component, a metal pipe that is arranged along the metal plate in contact with the metal plate and through which a refrigerant flows, and a heat transfer material that is insulating and is interposed between the heat-generating component and the metal plate, The cooling portion has a notch provided in the heat transfer material, the resin housing has a resin member that fits into the notch of the heat transfer material and is provided in contact with the heat-generating component; Electrical junction box.

2. The cooling portion has a notch formed in the metal plate that matches the notch in the heat transfer material, The resin member of the resin housing is also fitted into the notch of the metal plate.

2. The electrical junction box according to claim 1.

3. the metal pipe has a flat surface facing the plate surface of the metal plate and in contact with the plate surface of the metal plate; 2. The electrical junction box according to claim 1.

4. A conductive wiring material; an electrical connection box electrically connected to the wiring material; Equipped with The electrical connection box comprises: A heat-generating component; a cooling unit that cools the heat-generating component; a resin housing that holds the heat-generating component and the cooling unit; Equipped with the cooling unit includes a metal plate formed into a shape that follows the shape of the heat-generating component, a metal pipe that is arranged along the metal plate in contact with the metal plate and through which a refrigerant flows, and a heat transfer material that is insulating and is interposed between the heat-generating component and the metal plate, The cooling portion has a notch provided in the heat transfer material, the resin housing has a resin member that fits into the notch of the heat transfer material and is provided in contact with the heat-generating component; Wire harness.

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