Electrical junction box

Abstract

An electrical junction box includes: a first cooling member and a second cooling member; and a conductive member disposed to be sandwiched between the first and second cooling members. The conductive member includes a housing portion, an electronic component disposed within the housing portion, and a busbar disposed on the first mounting wall and the second mounting wall, and the conductive member is disposed such that an outer surface of the first mounting wall faces an outer surface of the first cooling member, and an outer surface of the second mounting wall faces an outer surface of the second cooling member. The electronic component includes a plurality of terminals and a movable contact, and the electronic component is configured such that the movable contact is located further away from the side wall than the plurality of terminals in the electronic component.

Description

Technical Field

[0001] The present disclosure relates to an electric junction box including a pair of cooling members capable of absorbing heat from an outer surface and dissipating the heat to the outside, and a conductive member disposed to be sandwiched between the cooling members. Background Art

[0002] An electrical junction box to be mounted on a vehicle or the like has been proposed in the related art. For example, the electrical junction box in the related art is in a box shape as a whole, and includes a busbar connected to an external power source or the like, an electronic component (such as a relay or a fuse) connected to the busbar, and a housing accommodating the busbar and the electronic component (for example, see JP2022-047797A).

[0003] However, in the above-described type of electrical junction box, generally, when an electronic component (particularly a relay or a fuse) operates, Joule heat associated with energization is generated in an internal circuit, a bus bar, and the like of the electronic component.

[0004] From the viewpoint of properly operating electronic components for a long period of time, it is desirable to effectively dissipate such heat generated at various locations during power-on to the outside. Summary of the invention

[0005] An object of the present disclosure is to provide an electrical junction box having good heat dissipation.

[0006] In order to achieve the above-mentioned object, the electric junction box according to the present disclosure is characterized as follows.

[0007] According to one aspect of the present disclosure, an electrical junction box is provided, comprising: a first cooling member and a second cooling member, which are capable of absorbing heat from an outer surface and dissipating the heat to the outside; and a conductive member arranged to be sandwiched between the first cooling member and the second cooling member, wherein: the conductive member comprises a shell portion having a box shape, an electronic component arranged inside the shell portion, and a bus bar arranged on a first mounting wall and a second mounting wall as two box walls of the shell portion and electrically connected to the electronic component, and the conductive member is arranged so that the outer surface of the first mounting wall faces the outer surface of the first cooling member, and the outer surface of the second mounting wall faces the outer surface of the second cooling member; and the electronic component comprises a plurality of terminals arranged on a side wall of the electronic component and connected to the bus bar, and a movable contact arranged inside the electronic component and capable of mechanically switching a conductive state and a non-conductive state between predetermined terminals among the plurality of terminals, and the electronic component is configured so that the movable contact is located at a position farther away from the side wall than the plurality of terminals in the electronic component.

[0008] According to the electrical junction box of the present disclosure, the conductive member combined with the electronic component and the bus is arranged to be sandwiched between the first cooling member and the second cooling member, so that the outer surfaces of the first mounting wall and the second mounting wall of the conductive member respectively provided with the bus face the outer surfaces of the first cooling member and the second cooling member. Therefore, the Joule heat generated in the internal circuit of the electronic component, the contact between the electronic component and the bus, and the bus during power-on is easily absorbed by the first cooling member and the second cooling member through the mounting wall. In addition, the conductive member is arranged to be sandwiched between the first cooling member and the second cooling member, so that the heat absorption capacity of the entire electrical junction box can be improved compared with the case where only one cooling member is used for heat absorption. Therefore, the electrical junction box with this configuration has good heat dissipation.

[0009] Furthermore, when the electrical junction box is used in a posture where the outer surface of the first cooling member that performs the above-mentioned heat absorption and the first mounting wall of the conductive member extend in the vertical direction (up and down direction), in the electronic component connected to the busbar provided on the first mounting wall, the terminal and the movable contact are arranged to be aligned in a direction (for example, lateral direction) intersecting the vertical direction. Therefore, for example, even in the case where a component around the movable contact falls off due to aging, excessive external force, etc., the component falls in the vertical direction, so that it is possible to avoid the component interfering with the switching of the conductive state and the non-conductive state between the movable contact and the terminal. The same applies to the busbar provided on the second mounting wall.

[0010] The present disclosure has been briefly described above. In addition, the details of the present disclosure can be clarified by reading the mode for carrying out the disclosure described below with reference to the drawings (hereinafter, referred to as "embodiment"). BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present disclosure will become more fully understood from the detailed description given below and the accompanying drawings, which are given by way of example only and thus are not limiting of the present disclosure, wherein:

[0012] Figure 1 is a perspective view showing an electric junction box according to an embodiment of the present disclosure;

[0013] Figure 2 Seen through the housing portion of the conductive member Figure 1 A top view of the electrical junction box shown;

[0014] Figure 3 is seen through the shell portion of the conductive member Figure 2 A cross-sectional view taken along line AA in FIG. 1 ; and

[0015] Figure 4 Seen from inside the relay Figure 1, the sectional view being taken along a horizontal plane in the vicinity of a relay provided in a housing portion of a conductive member. DETAILED DESCRIPTION

[0016] <Example>

[0017] Hereinafter, an electric junction box 1 according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. The electric junction box 1 is generally mounted on a vehicle and used. For example, a junction box, a relay box, etc. may be used as the electric junction box 1, but the electric junction box 1 is not limited thereto. Figure 1 As shown in FIG. 1 , the electrical junction box 1 includes a pair of cooling members 2A and 2B, and a conductive member 3 disposed so as to be sandwiched between the pair of cooling members 2A and 2B. The pair of cooling members 2A and 2B and the conductive member 3 are fixed to each other by fastening with bolts 4 .

[0018] In the following, for the convenience of description, Figures 1 to 4 As shown, "front-rear direction", "left-right direction" and "up-down direction" are defined. "Front-rear direction", "left-right direction" and "up-down direction" are orthogonal to each other. When the electrical junction box 1 is mounted on a vehicle, the "up-down direction" matches the up-down direction (vertical direction) of the vehicle. The "front-rear direction" and "left-right direction" are defined only for convenience of description, and when the electrical junction box 1 is mounted on a vehicle, they do not necessarily match the front-rear direction and left-right direction of the vehicle. Hereinafter, the components constituting the electrical junction box 1 will be described in order.

[0019] First, a pair of cooling members 2A and 2B will be described. Figure 1 and 2 As shown, a pair of cooling members 2A and 2B have the same outer shape and the same structure. The pair of cooling members 2A and 2B are arranged to sandwich the conductive member 3 in the front-to-back direction in a state where the orientations in the front-to-back direction are opposite to each other (a state where each two corresponding flange portions 13 face each other in the front-to-back direction to be described later). Hereinafter, only the cooling member 2A of the pair of cooling members 2A and 2B will be described, and the description of the cooling member 2B will be omitted.

[0020] like Figure 1 and Figure 2As shown, the cooling member 2A has a rectangular main body portion 10 extending in the left-right direction and the up-down direction and thinner in the front-back direction. The main body portion 10 is made of, for example, metal or resin. An inlet channel 11 and an outlet channel 12 communicating with the interior of the main body portion 10 are provided on the right side wall of the main body portion 10, and the inlet channel 11 and the outlet channel 12 are connected to a radiator (not shown) located outside the cooling member 2A. The cooling water cooled by the radiator is introduced into the main body portion 10 by a pump (not shown) or the like through the inlet channel 11, and absorbs heat from the outside through the outer wall of the main body portion 10. The cooling water that has absorbed heat (heated) returns to the radiator from the inside of the main body portion 10 through the outlet channel 12 and is cooled again. By repeating such a cycle, the cooling member 2A is used to absorb heat from the outer surface of the main body portion 10 and dissipate the heat to the outside. Among the outer walls of the main body portion 10, only the rear side wall facing the conductive member 3 to be cooled may be made of metal having excellent heat transfer performance, while the other outer walls may be made of low-cost and lightweight resin.

[0021] A pair of left and right flange portions 13 are provided on the main body portion 10 to continuously extend outward in the left and right directions from the rear side wall. A plurality of through holes (not shown) into which the bolts 4 are inserted are provided in each flange portion 13 to be aligned in the up-down direction. The flange portion 13 is a portion for performing the above-mentioned fastening using the bolts 4.

[0022] Next, the conductive member 3 will be described. Figures 1 to 3 As shown, the conductive component 3 includes a shell portion 20 having a box shape, a plurality of relays 30 and fuses 40 arranged inside the shell portion 20, and a plurality of bus bars 50 arranged on mounting walls 21A and 21B which are two box walls of the shell portion 20 and electrically connected to the plurality of relays 30 and fuses 40.

[0023] The shell part 20 has a rectangular box shape extending in the left-right direction and the up-down direction, and is thick in the front-to-back direction. For example, the shell part 20 is made of resin. The front side wall of the shell part 20 (a rectangular flat wall extending in the left-right direction and the up-down direction, which is arranged to face the rear side wall of the cooling member 2A) is used as a mounting wall 21A provided with the bus 50, and the rear side wall of the shell part 20 (a rectangular flat wall extending in the left-right direction and the up-down direction, which is arranged to face the front side wall of the cooling member 2B) is used as a mounting wall 21B provided with the bus 50 (see Figure 2 and Figure 4 A plurality of through holes 23 penetrating from the inside to the outside of the mounting walls 21A and 21B are formed in the portions of the mounting walls 21A and 21B where the busbars 50 are provided (see FIG. Figure 4 ). The operation achieved by providing such a through hole 23 will be described later.

[0024] like Figure 2 As shown, in the housing portion 20, two relays 30 are arranged to be aligned in the left-right direction along the inner surface of the mounting wall 21A near the inner surface of the mounting wall 21A, and two relays 30 and a fuse 40 are arranged to be aligned in the left-right direction along the inner surface of the mounting wall 21B near the inner surface of the mounting wall 21B. The relay 30 is a component that performs a switching function of connecting and disconnecting power, and the fuse 40 is a component that performs a fuse function of disconnecting power when a current exceeding the rated current flows. A plurality of flat-plate-shaped busbars 50 are arranged on the mounting walls 21A and 21B to face the inner surfaces of the mounting walls 21A and 21B, respectively, and are aligned in the left-right direction along the inner surfaces. Specifically, the plurality of busbars 50 are arranged so that a pair of right and left busbars 50 corresponding to each relay 30 and fuse 40 are electrically connected. A busbar 50 arranged on the mounting wall 21A and a busbar 50 arranged on the mounting wall 21B are electrically connected to each other via a connecting busbar 60 arranged inside the housing portion 20 (see Figure 2 ). The bus bars 50 may be connected to each other by using electric wires instead of the connection bus bars 60 .

[0025] In the following, reference will be made to Figure 4 Briefly describe the internal structure of the relay 30 and the connection structure between the relay 30 and a pair of busbars 50. The relay 30 includes a pair of metal terminals 31 arranged to protrude from one side wall (front side wall) of the housing of the relay 30 to the outside, a metal movable contact 32 arranged inside the housing of the relay 30 and capable of mechanically switching between a plurality of terminals 31, a coil 33 arranged inside the housing of the relay 30 and driving the movable contact 32, and a contact spring 35 arranged in the housing of the relay 30 and arranged between the core 34 of the coil 33 and the movable contact 32. The contact spring 35 constantly biases the movable contact 32 toward the conductive side (front side). When the coil 33 is energized, the coil 33 applies an attractive force to overcome the biasing force of the contact spring 35 and drive the movable contact 32 to the non-conductive side (rear side). As described above, the relay 30 can mechanically switch between the conductive state and the non-conductive state between the plurality of terminals 31 by switching the non-energization and energization of the coil 33. Therefore, the movable contact 32 is located at a position (position on the rear side) farther from one side wall (front side wall) of the housing of the relay 30 than the plurality of terminals 31, and the plurality of terminals 31 and the movable contact 32 are positioned to be aligned in the front-rear direction. Therefore, for example, even in the case where a component (e.g., coil 33) around the movable contact 32 falls off due to aging degradation, excessive external force, etc., the component falls in the vertical direction, so that it is possible to avoid the component interfering with the switching between the conductive state and the non-conductive state between the movable contact 32 and the plurality of terminals 31.

[0026] Each of the plurality of terminals 31 of the relay 30 is fastened and fixed to the corresponding busbar 50 by a metal nut 51 in a recess of a corresponding one of the pair of corresponding busbars 50. Thus, the pair of busbars 50 and the relay 30 are fixed to each other, and the pair of busbars 50 are electrically connected to the relay 30. The components constituting the electric junction box 1 have been described above.

[0027] Next, the assembly of the electrical junction box 1 will be described. To assemble the electrical junction box 1, as shown in FIG. Figure 1 As shown, the cooling members 2A and 2B are respectively arranged on the rear side and the front side of the conductive member 3 so that the pair of cooling members 2A and 2B sandwich the conductive member 3 in the front-rear direction. Next, a gap (see FIG. 1 ) is formed between the outer surface of the mounting wall 21A of the conductive member 3 and the outer surface of the main body portion 10 of the cooling member 2A facing each other. Figure 4 ), and the gap between the outer surface of the mounting wall 21B of the conductive member 3 and the outer surface of the main body portion 10 of the cooling member 2B facing each other is filled with a paste-like heat transfer paste 70 having excellent heat transfer performance. Next, the conductive member 3 and the pair of cooling members 2A and 2B are fastened and fixed by using a plurality of bolts 4 inserted into through holes (not shown) provided in the flange portions 13 of the pair of cooling members 2A and 2B. Thus, the assembly of the electrical junction box 1 is completed, and the Figure 1 The electrical junction box 1 is shown.

[0028] When the electrical junction box 1 is assembled, Figure 2 and Figure 4 As shown, the conductive member 3 is arranged to be sandwiched between the pair of cooling members 2A and 2B so that the outer surfaces of the mounting walls 21A and 21B provided with the busbar 50 face the outer surfaces of the cooling members 2A and 2B, respectively. Therefore, when the conductive member 3 is energized, the Joule heat generated in the internal circuit of the relay 30 (particularly, the movable contact 32 and the coil 33), the contacts between the relay 30 and the fuse 40 and the busbar 50, and the busbar 50 is easily absorbed by the pair of cooling members 2A and 2B via the mounting walls 21A and 21B and the heat transfer paste 70. In addition, the conductive member 3 is arranged to be sandwiched between the pair of cooling members 2A and 2B, so that the heat absorption capacity of the entire electrical junction box 1 can be improved compared with the case where only one cooling member is used for heat absorption.

[0029] In addition, in the assembled state of the electrical junction box 1, as shown in FIG. Figure 4 As shown in FIG. 1 , a portion of the heat transfer paste 70 disposed in the gap between the outer surface of the mounting wall 21A and the outer surface of the main body portion 10 of the cooling member 2A facing each other passes through the plurality of through holes 23 disposed in the mounting wall 21A, spreads to the inner surface side of the mounting wall 21A, and contacts the bus bar 50 facing the inner surface of the mounting wall 21A (see FIG. 1 ). Figure 4). Similarly, a portion of the heat transfer paste 70 disposed in the gap between the outer surface of the mounting wall 21B and the outer surface of the main body portion 10 of the cooling member 2B, which face each other, passes through a plurality of through holes 23 disposed in the mounting wall 21B, diffuses to the inner surface side of the mounting wall 21B, and contacts the bus 50 facing the inner surface of the mounting wall 21B. In other words, the heat transfer paste 70 contacts the cooling members 2A and 2B and the bus 50 via the through holes 23. Therefore, the Joule heat generated in the internal circuit of the relay 30 (particularly, the movable contact 32 and the coil 33), the contacts between the relay 30 and the fuse 40 and the bus 50, and the bus 50 can be effectively transferred to the cooling members 2A and 2B via the heat transfer paste 70.

[0030] Furthermore, in the assembled state of the electrical junction box 1, the plurality of bolts 4 fix the conductive member 3 and the cooling member 2A while applying an external force to bring the conductive member 3 and the cooling member 2A closer to each other, and the plurality of bolts 4 fix the conductive member 3 and the cooling member 2B while applying an external force to bring the conductive member 3 and the cooling member 2B closer to each other. Therefore, the state in which the mounting walls 21A and 21B of the housing portion 20 of the conductive member 3 are respectively disposed close to the outer surfaces of the cooling members 2A and 2B can be maintained.

[0031] <Operations and Effects>

[0032] As described above, according to the electric junction box 1 of the present embodiment, the conductive member 3 including the relay 30, the fuse 40 and the busbar 50 is arranged to be sandwiched between the cooling members 2A and 2B so that the outer surfaces of the mounting walls 21A and 21B of the conductive member 3 provided with the busbar 50 face the outer surfaces of the cooling members 2A and 2B, respectively. Therefore, the Joule heat generated in the internal circuit of the relay 30 (particularly, the movable contact 32 and the coil 33), the contact between the relay 30 and the fuse 40 and the busbar 50, and the busbar 50 during power-on is easily absorbed by the cooling members 2A and 2B. In addition, the conductive member 3 is arranged to be sandwiched between the cooling members 2A and 2B, so that the heat absorption capacity of the entire electric junction box 1 can be improved compared with the case where only one cooling member is used for heat absorption. Therefore, the electric junction box 1 according to the present embodiment has good heat dissipation.

[0033] In addition, the electrical junction box 1 is used in a posture in which the outer surface of the cooling member 2A that performs heat absorption and the mounting wall 21A of the conductive member 3 extend in the vertical direction. Therefore, in the relay 30 connected to the busbar 50 set on the mounting wall 21A, the terminal 31 and the movable contact 32 are positioned to be aligned in a direction intersecting the vertical direction (for example, the front-to-back direction). Therefore, for example, even in the case where a component (for example, the coil 33) around the movable contact 32 falls off due to aging degradation, excessive external force, etc., the component also falls in the vertical direction, so that the component can be avoided from interfering with the switching between the conductive state and the non-conductive state between the movable contact 32 and the terminal 31. The same applies to the busbar 50 set on the mounting wall 21B.

[0034] In addition, the heat transfer paste 70 provided to pass through the through hole 23 of the housing portion 20 of the conductive member 3 is in contact with both the cooling members 2A and 2B and the busbar 50. Therefore, the Joule heat generated in the internal circuit of the relay 30 (particularly, the movable contact 32 and the coil 33), the contact between the relay 30 and the fuse 40 and the busbar 50, and the busbar 50 can be effectively transferred to the cooling members 2A and 2B via the heat transfer paste 70. Therefore, the electric junction box 1 according to the present embodiment has better heat dissipation.

[0035] In addition, the plurality of bolts 4 fix the conductive member 3 and the cooling member 2A while applying an external force to bring the conductive member 3 and the cooling member 2A closer to each other, and fix the conductive member 3 and the cooling member 2B while applying an external force to bring the conductive member 3 and the cooling member 2B closer to each other. Therefore, the state in which the mounting walls 21A and 21B of the housing portion 20 of the conductive member 3 are respectively disposed close to the outer surfaces of the cooling members 2A and 2B can be maintained, so that good heat dissipation can be maintained for a long time.

[0036] <Other embodiments>

[0037] The present disclosure is not limited to the above-mentioned embodiments, and various modifications can be adopted within the scope of the present disclosure. For example, the present disclosure is not limited to the above-mentioned embodiments, and modifications, improvements, etc. can be appropriately made. In addition, the materials, shapes, sizes, quantities, arrangement positions, etc. of the components in the above-mentioned embodiments are freely selected and are not limited as long as the present disclosure can be implemented.

[0038] Here, the features of the above-described embodiment of the electrical junction box 1 will be briefly summarized and listed in the following [1] to [3].

[0039] [1] An electrical junction box (1), comprising:

[0040] a first cooling member (2A) and a second cooling member (2B) capable of absorbing heat from an outer surface and dissipating the heat to the outside; and

[0041] The conductive member (3) is arranged to be sandwiched between the first cooling member (2A) and the second cooling member (2B), wherein

[0042] The conductive member (3) includes a housing portion (20) having a box shape, electronic components (30, 40) arranged inside the housing portion (20), and a bus bar (50) arranged on a first mounting wall (21A) and a second mounting wall (21B) as two box walls of the housing portion (20) and electrically connected to the electronic components (30, 40), and the conductive member (3) is arranged so that the outer surface of the first mounting wall (21A) faces the outer surface of the first cooling member (2A), and the outer surface of the second mounting wall (21B) faces the outer surface of the second cooling member (2B), and

[0043] The electronic component (30) includes a plurality of terminals (31) arranged on a side wall of the electronic component (30) and connected to a busbar (50), and a movable contact (32) arranged inside the electronic component (30) and capable of mechanically switching a conductive state and a non-conductive state between predetermined terminals among the plurality of terminals (31), and the electronic component (30) is configured so that the movable contact (32) is located at a position farther from the side wall than the plurality of terminals (31) in the electronic component (30).

[0044] According to the electrical junction box having the above-mentioned [1] configuration, the conductive member incorporating the electronic component and the busbar is arranged to be sandwiched between the first cooling member and the second cooling member, so that the outer surfaces of the first mounting wall and the second mounting wall of the conductive member provided with the busbar face the outer surfaces of the first cooling member and the second cooling member, respectively. Therefore, the Joule heat generated in the internal circuit of the electronic component, the contact between the electronic component and the busbar, and the busbar during power-on is easily absorbed by the first cooling member and the second cooling member through the mounting wall. In addition, the conductive member is arranged to be sandwiched between the first cooling member and the second cooling member, so that the heat absorption capacity of the entire electrical junction box can be improved compared to the case where only one cooling member is used for heat absorption. Therefore, the electrical junction box having the present configuration has good heat dissipation.

[0045] Furthermore, when the electrical junction box is used in a posture where the outer surface of the first cooling member that performs the above-mentioned heat absorption and the first mounting wall of the conductive member extend in the vertical direction (up and down direction), in the electronic component connected to the busbar provided on the first mounting wall, the terminal and the movable contact are arranged to be aligned in a direction (for example, a lateral direction) intersecting the vertical direction. Therefore, for example, even in the case where a component around the movable contact falls off due to aging, excessive external force, etc., the component falls in the vertical direction, so that it is possible to avoid the component interfering with the switching of the conductive state and the non-conductive state between the movable contact and the terminal. The same applies to the busbar provided on the second mounting wall.

[0046] [2] The electrical junction box according to the above [1] further includes:

[0047] a first heat transfer member (70) and a second heat transfer member (70), wherein the first heat transfer member (70) is configured to transfer heat between the first cooling member (2A) and the conductive member (3), and the second heat transfer member (70) is configured to transfer heat between the second cooling member (2B) and the conductive member (3), wherein

[0048] The housing portion (20) has a first through hole (23) penetrating from the inside of the first mounting wall (21A) to the outside and a second through hole (23) penetrating from the inside of the second mounting wall (21B) to the outside,

[0049] The first heat transfer member (70) is arranged to pass through the first through hole (23) and to contact the first cooling member (2A) and the bus bar (50) arranged on the first installation wall (21A), and

[0050] The second heat transfer member (70) is disposed to pass through the second through hole (23) and to contact the second cooling member (2B) and the bus bar (50) disposed on the second mounting wall (21B).

[0051] According to the electrical junction box having the above-mentioned [2] configuration, the first heat transfer member provided to pass through the first through hole of the housing portion of the conductive member is in contact with both the first cooling member and the busbar. Therefore, the Joule heat generated in the contact between the electronic component and the busbar and in the busbar can be effectively transferred to the cooling member via the heat transfer member. The same applies to the second heat transfer member. Therefore, the electrical junction box having the present configuration has better heat dissipation.

[0052] [3] The electrical junction box (1) according to the above [1] further includes:

[0053] A first fastening member (4) and a second fastening member (4), the first fastening member (4) fixes the conductive member (3) and the first cooling member (2A) while applying an external force to bring the conductive member (3) and the first cooling member (2A) closer to each other, and the second fastening member (4) fixes the conductive member (3) and the second cooling member (2B) while applying an external force to bring the conductive member (3) and the second cooling member (2B) closer to each other.

[0054] According to the electrical junction box having the above-mentioned [3] configuration, the first fastening member fixes the conductive member and the first cooling member, while applying an external force to bring the conductive member and the first cooling member closer to each other. The same applies to the second fastening member. Therefore, the state in which the first mounting wall and the second mounting wall of the housing portion of the conductive member are respectively arranged close to the outer surfaces of the first cooling member and the second cooling member can be maintained, so that good heat dissipation can be maintained for a long time.

Claims

1. An electrical junction box, comprising: a first cooling member and a second cooling member, the first cooling member and the second cooling member being capable of absorbing heat from an outer surface and dissipating the heat to the outside; and a conductive member disposed to be sandwiched between the first cooling member and the second cooling member, wherein: The conductive member includes a housing portion having a box shape, an electronic component disposed inside the housing portion, and a bus bar disposed on a first mounting wall and a second mounting wall as two box walls of the housing portion and electrically connected to the electronic component, and the conductive member is disposed such that an outer surface of the first mounting wall faces an outer surface of the first cooling member, and an outer surface of the second mounting wall faces an outer surface of the second cooling member; and The electronic component includes a plurality of terminals and a movable contact, the plurality of terminals are arranged on a side wall of the electronic component and connected to the bus bar, the movable contact is arranged inside the electronic component and can mechanically switch a conductive state and a non-conductive state between predetermined terminals among the plurality of terminals, and the electronic component is configured so that the movable contact is located at a position farther away from the side wall than the plurality of terminals in the electronic component.

2. The electrical junction box according to claim 1, further comprising: a first heat transfer member configured to transfer heat between the first cooling member and the conductive member, and a second heat transfer member configured to transfer heat between the second cooling member and the conductive member, wherein: The housing portion has a first through hole penetrating from the inside to the outside of the first mounting wall, and a second through hole penetrating from the inside to the outside of the second mounting wall; The first heat transfer member is disposed to pass through the first through hole and to contact the first cooling member and a bus bar disposed on the first mounting wall; and The second heat transfer member is disposed to pass through the second through hole and to contact the second cooling member and the bus bar disposed on the second mounting wall.

3. The electrical junction box according to claim 1, further comprising: A first fastening member and a second fastening member, wherein the first fastening member fixes the conductive member and the first cooling member while applying an external force to bring the conductive member and the first cooling member closer to each other, and the second fastening member fixes the conductive member and the second cooling member while applying an external force to bring the conductive member and the second cooling member closer to each other.

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