Electrical connection box

Abstract

The present application realizes miniaturization. An electrical connection box (A) is provided with a base member (10) on which an electrical device (13) is mounted, and a pair of side wall members (11) mounted to the base member (10) in a manner of sandwiching the base member (10) in a width direction, a device housing chamber (12) housing the electrical device (13) is formed by the base member (10) and the pair of side wall members (11), the base member (10) has a protruding portion (22) protruding from an outer side surface of the base member (10) in the width direction, and a housing recess (46) housing the protruding portion (22) is formed in the side wall member (11).

Description

Technical Field

[0001] This disclosure relates to an electrical connection box. Background Technology

[0002] Patent document 1 discloses a technique for installing a blocking element in a blocking element storage section formed in a connecting box body. The blocking element storage section has a space open on the upper surface of the connecting box body, and the blocking element is inserted into the blocking element storage section from above the connecting box body. Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2021-002441 Summary of the Invention The problem that the invention aims to solve

[0004] In the above-described structure, the peripheral wall of the blocking element storage section surrounds the electrical components from the front, back, left, and right. Therefore, when the blocking element is picked up with fingers and installed in the blocking element storage section, there is a concern that the fingers may interfere with the peripheral wall. As a countermeasure, it is considered to form the side wall covering the side of the blocking element storage section in the main body of the connecting box into a different component. This would allow the installer to store the blocking element in the blocking element storage section without interference from the side wall component. After storing the blocking element in the blocking element storage section, the blocking element can be protected by assembling the side wall component to the base component. However, when the side of the blocking element storage section is covered by the side wall, the outer wall of the blocking element storage section overlaps with the outer wall of the side wall in the width direction, resulting in a larger dimension in the width direction.

[0005] The electrical connection box disclosed herein is based on the above circumstances and its purpose is to achieve miniaturization. Solution for solving the problem

[0006] The electrical connection box disclosed herein has the following features: Base components, which mount electrical devices; and A pair of sidewall members, the pair of sidewall members being mounted to the base member such that they are clamped into the base member in the width direction. The base component and the pair of sidewall components form a device storage chamber for housing the electrical components. The base component has a protrusion that extends from the outer side of the base component along the width direction. The sidewall component has a receiving recess for receiving the protrusion. The effects of the invention

[0007] According to this disclosure, miniaturization can be achieved. Attached Figure Description

[0008] Figure 1 This is a perspective view of the electrical connection box of Example 1. Figure 2 This is a perspective view showing the electrical connection box separated into a base component and a side wall component. Figure 3 This is a three-dimensional view of the base component. Figure 4 This is a bottom view of the electrical connection box. Figure 5 This is the front sectional view of the electrical connection box. Figure 6 It is a perspective view showing the state of the sidewall component separated into the sidewall body and the busbar. Detailed Implementation

[0009] [Description of embodiments of this disclosure] First, embodiments of this disclosure will be described. The electrical connection box disclosed herein is configured as follows: (1) The device comprises: a base component for mounting electrical devices; and a pair of sidewall components mounted on the base component such that they are clamped into the base component in the width direction, wherein the base component and the pair of sidewall components form a device storage chamber for housing the electrical devices, the base component having a protrusion protruding from the outer surface of the base component in the width direction, and a receiving recess for receiving the protrusion being formed in the sidewall components. According to the structure of this disclosure, by housing the protrusion within the receiving recess, the width dimension is reduced by an amount corresponding to the protrusion dimension, thus enabling miniaturization.

[0010] (2) Preferably, the busbar is housed inside the sidewall component, and the housing recess opens in such a way that a portion of the busbar is exposed when the base component is separated from the sidewall component. According to this structure, since there is no partition wall between the protrusion and the busbar, miniaturization in the width direction can be achieved accordingly.

[0011] (3) Based on (2), preferably, the busbar has a base plate portion and a heat dissipation plate portion configured to overlap with the base plate portion, the heat dissipation plate portion being configured to face the receiving recess, and a heat dissipation space is formed between the base member and the sidewall member. According to this structure, the heat of the heat dissipation plate portion can be released from the receiving recess to the heat dissipation space.

[0012] (4) Preferably, the base member is provided with a departure limiting portion that restricts the sidewall member from leaving the base member in the width direction. According to this structure, even if the sidewall member intends to deform in a manner that allows it to leave the base member, the departure limiting portion prevents deformation. Thus, it is possible to prevent the width dimension from expanding due to deformation of the sidewall member.

[0013] (5) Based on (4), preferably, the outer surface of the sidewall member has an outermost region that is furthest from the base member in the width direction, and the departure limiting portion is disposed only in a region closer to the base member than the outermost region. According to this structure, the width dimension can be prevented from expanding due to the presence of the departure limiting portion.

[0014] [Details of the embodiments disclosed herein] [Example 1] Reference Figures 1-6 Embodiment 1, which embodies the electrical connection box of this disclosure, will be described. Furthermore, the invention is not limited to these examples, but refers to all modifications shown in the claims and encompassing the meaning and scope equivalent to the claims. In this Embodiment 1, regarding the front-to-back direction, Figure 1 , Figure 3 The lower left of the middle Figure 2 , Figure 6 The upper left corner of the middle, and Figure 4 The left side is defined as the front. Regarding the up and down directions, [the text will be incomplete]. Figures 1-3 , Figure 5 , Figure 6 The directions indicated by the center are directly defined as up and down. The left and right directions will be discussed later. Figure 4 The direction indicated by the center is directly defined as left or right. Left-right direction and width direction are used with the same meaning.

[0015] <Summary of Electrical Connection Box A> like Figure 1 , Figure 2 As shown, the electrical connection box A of this embodiment 1 is constructed by assembling a base component 10 and a pair of symmetrical side wall components 11, which are separate from the base component 10. The pair of side wall components 11 are assembled relative to the base component 10 in a manner that clamps them from the left and right, that is, clamps them in the width direction. The electrical connection box A has a device storage chamber 12 divided by the base component 10 and the pair of side wall components 11. The device storage chamber 12 is open on the upper surface of the electrical connection box A. Multiple electrical devices 13, such as fuses, are stored in the device storage chamber 12.

[0016] A pair of left and right front fitting portions 14 are formed at the front end of the base component 10, and a pair of left and right rear fitting portions 15 are formed at the rear end of the base component 10. For example... Figure 2 , Figure 6As shown, a pair of left and right front insert portions 16 are formed at the front end of the side wall component 11, and a pair of left and right rear insert portions 17 are formed at the rear end of the side wall component 11. The base component 10 and the side wall component 11 are kept in an assembled state by the engagement of the front insert portion 14 with the front insert portion 16 and the engagement of the rear insert portion 15 with the rear insert portion 17.

[0017] <Base Component 10> The base component 10 includes a retaining component 18 made of synthetic resin, a terminal block 30 made of synthetic resin that is separate from the retaining component 18, and a pair of symmetrical metal plates 36. Figure 2 , Figure 3 As shown, the retaining member 18 is a single device having a main body 19 shaped as a cuboid with its long side facing the front-rear direction, a front plate 20 extending upward from the front edge of the main body 19, and a rear plate 21 extending upward from the rear edge of the main body 19. The space enclosed by the upper surface of the main body 19, the rear surface of the front plate 20, and the front surface of the rear plate 21 functions as a device storage chamber 12. When the side wall member 11 is not assembled to the base member 10, the device storage chamber 12 is open to the outside of the base member 10 on the upper surface of the base member 10 and on the left and right sides of the base member 10.

[0018] Symmetrical protrusions 22 are formed at the front ends of the left and right outer surfaces of the main body 19. The protrusions 22 constitute the outermost cavity 23, which is located along the outer surface of the main body 19 in the width direction among the multiple cavities formed within the main body 19. In a side view of the base member 10, the protrusions 22 are square. The protrusions 22 function as partitions that form the outer surface of the main body 19 and divide the external space of the main body 19 from the outermost cavity 23. The protrusions 22 protrude outwards in a stepped manner in the width direction relative to the area of ​​the outer surface of the main body 19 other than the protrusions 22. Guide ribs 24 extending in the vertical direction are formed at the rear edge of the protrusions 22. The area where the guide ribs 24 are formed in the width direction is only within the area where the protrusions 22 are formed in the protruding direction in the width direction.

[0019] like Figures 2-5 As shown, a pair of symmetrically arranged protruding portions 25 are formed at the rear ends of the left and right outer surfaces of the main body 19. The protruding portions 25 extend along the lower edge of the main body 19 in the front-rear direction and protrude outwards in the left-right direction from the lower edge of the main body 19. Figure 2 , Figure 3 , Figure 5 As shown, a hook portion 26 protruding upward in a rib-like manner is formed on the protruding end edge extending in the front-rear direction of the extension portion 25. The hook portion 26 is located behind the protrusion portion 22.

[0020] like Figure 3 As shown, a pair of symmetrical rear-side fitting portions 15 are formed at the left and right ends of the rear plate portion 21. A guide groove 27 is formed in the rear-side fitting portion 15, which is open on the front and upper surfaces and extends in the vertical direction. A locking hole 28 is formed in the rear-side fitting portion 15 to communicate with the guide groove 27.

[0021] Terminal block 30 is a single device, having a support plate portion 31 that orients the plate thickness direction toward the front-rear direction (see reference). Figure 4 ) and a receiving plate portion 32 that oriented the thickness direction vertically. Bolt holes 33 (see reference) are formed in the receiving plate portion 32, extending vertically through it. Figure 4 The terminal block 30 is assembled to the retaining member 18 in a manner that covers the front surface of the main body 19 and the front surface of the front plate 20. A pair of symmetrical front-side fitting portions 14 are formed at both ends of the terminal block 30. Figure 2 , Figure 3 As shown, a groove 34 is formed on the rear surface of the front fitting portion 14, which opens onto the upper surface of the terminal block 30 and extends in the vertical direction. For example... Figure 3 As shown, a pair of left and right storage spaces 35 are formed between the front plate portion 20 of the retaining member 18 and the support plate portion 31 of the terminal block 30. The upper end of the storage space 35 opens in the form of a slit in the left and right direction toward the front of the base member 10.

[0022] Plate 36 is a single component formed by bending a slender metal sheet. For example... Figure 3 As shown, plate 36 has a flat plate-shaped power supply section 37 with its thickness direction facing the front-rear direction, and a plate-shaped mounting section 38 extending horizontally forward from the upper edge of the plate-shaped power supply section 37. A mounting hole 39 is formed in the plate-shaped mounting section 38, penetrating it in the vertical direction. Plate 36 is assembled to base member 10 with the plate-shaped power supply section 37 housed within the housing space 35 and the plate-shaped mounting section 38 resting on the receiving plate section 32. A power supply terminal (not shown) connected to a battery is connected to the plate-shaped power supply section 37.

[0023] <Side wall component 11> The sidewall component 11 is constructed by assembling a sidewall body 40 made of synthetic resin and a busbar 50 made of metal. For example... Figure 2 , Figure 6 As shown, the sidewall body 40 is a single device with a top-view shape that is slender in the front-to-back direction and has its wall thickness oriented in the left-to-right direction. For example... Figure 2 , Figures 4-6As shown, the sidewall body 40 has an outer wall portion 41 with its wall thickness direction oriented left-right and an inner wall portion 42 with its wall thickness direction oriented left-right. The lower end portion of the front edge of the sidewall body 40 functions as a front insert portion 16. The lower end portion of the rear edge of the sidewall body 40 functions as a rear insert portion 17. Figure 2 , Figure 6 As shown, a protruding locking portion 43 is formed on the rear end face of the sidewall body 40.

[0024] like Figure 4 , Figure 5 As shown, a busbar storage chamber 44 is formed inside the sidewall body 40, sandwiched between the outer wall portion 41 and the inner wall portion 42. The busbar storage chamber 44 is a narrow space with dimensions smaller in the left-right direction than in the front-back direction and in the top-bottom direction. Figure 5 As shown, a busbar mounting port 45 with a slit-like opening in the front-to-back direction is formed on the lower surface of the side wall body 40. The busbar mounting port 45 is an opening for mounting the busbar 50 into the busbar storage chamber 44.

[0025] like Figure 2 , Figure 6 As shown, a receiving recess 46 is formed in the lower end region of the inner wall portion 42, that is, in the region at the same height as the main body portion 19 of the base member 10. The receiving recess 46 is formed at the front end of the inner wall portion 42. The receiving recess 46 is open at the lower end edge of the inner wall portion 42, and is open on both the outer and inner surfaces of the inner wall portion 42. The receiving recess 46 communicates the manifold receiving chamber 44 with the outside of the sidewall body 40. Figure 4 , Figure 6 As shown, a guide rail 47 extending in the vertical direction is formed at the rear edge of the opening edge of the receiving recess 46. The area where the guide rail 47 is formed in the width direction is only within the wall thickness of the inner wall portion 42.

[0026] Busbar 50 is a single device made of a metal sheet that has been punched into a predetermined shape and bent. For example... Figure 6 As shown, the busbar 50 has a base plate portion 51, a heat sink portion 52, a connecting plate portion 53, and a plurality of tabs 54. The base plate portion 51 and the heat sink portion 52 are square flat plates with their thickness direction oriented left-right. The heat sink portion 52 extends from the lower edge of the base plate portion 51 in a manner that overlaps with the inner surface of the base plate portion 51. The plurality of tabs 54 are arranged to protrude upward from the upper edge of the base plate portion 51 and are spaced apart in the front-back direction. The connecting plate portion 53 protrudes horizontally inward from the upper edge of the support portion 55 at the front end of the base plate portion 51. A through hole 56 extending in the vertical direction is formed in the connecting plate portion 53.

[0027] The busbar 50 is assembled to the sidewall body 40 with the base plate portion 51, the heat sink portion 52, and the tab 54 housed in the busbar storage chamber 44 from the busbar mounting port 45. The connecting plate portion 53 protrudes outward from the sidewall body 40 and protrudes in the width direction to a position closer to the inside of the sidewall body 40, i.e., closer to the base member 10.

[0028] like Figure 2 , Figure 6 As shown, a wide extension 57 is formed at the upper end of the sidewall body 40. The area on the outer surface of the sidewall member 11 where the extension 57 is formed is defined as the outermost region 58 located on the outermost side surface of the sidewall member 11 in the left-right direction. Within the extension 57, a plurality of fuse housings 59, which are open on the upper surface of the sidewall body 40, are arranged in a row in the front-back direction. The lower ends of the plurality of fuse housings 59 communicate with the busbar housing 44. A fuse 60 is installed in the fuse housing 59 from above the sidewall member 11 (see reference). Figure 6 One lead 61 of the fuse 60 is connected to the tab 54 of the busbar 50. A wire harness terminal (not shown) for connection to an electrical wire (not shown) is housed in the lower region of the widened portion 57. The wire harness terminal is connected to the other lead 61 of the fuse 60.

[0029] <Assembly sequence of electrical connection box A> When assembling the electrical connection box A, with the retaining member 18 separated from the terminal block 30, the plate 36 is temporarily held on the terminal block 30, and the terminal block 30 and the plate 36 are assembled. By assembling the terminal block 30 onto the retaining member 18, a storage space 35 is formed, and the plate-shaped power supply part 37 of the plate 36 is stored in the storage space 35, thereby completing the assembly of the base member 10. The plate-shaped mounting part 38 is placed on the receiving plate part 32.

[0030] After assembling the base component 10, the electrical device 13 is housed in the component storage chamber 12 from above the base component 10, and then mounted on the holding component 18. Since the component storage chamber 12 opens to the left and right sides of the base component 10, the fingers of the installer will not interfere with the base component 10 if they grasp the electrical device 13 from the left or right. Therefore, the installation of the electrical device 13 is smooth. Even when the electrical device 13 is installed using an automatic machine, if the machine's grippers hold the electrical device 13 from the left and right, the grippers will not interfere with the base component 10.

[0031] Next, a pair of sidewall members 11 are assembled on the base member 10. During assembly, the front insert 16 is inserted from above into the groove 34 relative to the front insert 14, and the rear insert 17 is inserted from above into the guide groove 27 relative to the rear insert 15. The guide rail 47 of the receiving recess 46 is engaged with the guide rib 24 of the protrusion 22 and slidably. When the sidewall members 11 are assembled on the base member 10, the device receiving chamber 12 is covered from both sides by the sidewall members 11, thus completing the assembly of the electrical connection box A. The device receiving chamber 12 is now completely surrounded from the front-to-back direction and the left-to-right direction.

[0032] With the sidewall component 11 assembled onto the base component 10, the locking part 43 engages with the locking hole 28, thereby preventing the sidewall component 11 from disengaging upward relative to the base component 10. The sidewall component 11 and the base component 10 are positioned in the front-rear and left-right directions by the engagement of the front insert part 16 and the front fitting part 14. The connecting plate part 53 of the busbar 50 overlaps with the upper surface of the plate-shaped mounting part 38 of the plate 36. Bolts 66 are inserted through the through hole 56, the mounting hole 39, and the bolt hole 33, and screwed into the nut 67 provided on the lower surface of the receiving plate part 32 and tightened. This tightening fixes the plate 36 and the busbar 50 to the terminal block 30.

[0033] With the sidewall member 11 assembled to the base member 10, the outer surface of the main body 19 is covered by the sidewall member 11. The protrusion 22 partially protrudes from the outer surface of the main body 19. Therefore, if the opposing surface of the outer surface of the sidewall member 11, which faces the main body 19, abuts against the protruding end face of the protrusion 22, the width of the electrical connection box A increases by an amount corresponding to the protrusion size of the protrusion 22. In this embodiment, since the protrusion 22 is housed within the receiving recess 46 of the sidewall member 11, the width of the electrical connection box A does not increase due to the presence of the protrusion 22, even though the protrusion 22 is formed.

[0034] The recess 46 extends from the opposing surface of the outer surface of the sidewall member 11, opposite to the main body 19, through the inner wall portion 42 to the busbar receiving chamber 44 within the sidewall member 11. The protrusion 22 is housed within the thickness of the inner wall portion 42. Therefore, compared to the case where the recess 46 does not extend to the busbar receiving chamber 44, the width of the electrical connection box A is reduced to a smaller size. Since the protruding end of the protrusion 22 is located at the same position as the inner surface of the inner wall portion 42 in the width direction, or at a position closer to the outer surface than the inner surface of the inner wall portion 42, the protrusion 22 will not interfere with the heat sink portion 52 of the busbar 50.

[0035] The guide rib 24 of the protrusion 22 engages with the guide rail 47 of the receiving recess 46 from the opposite side of the busbar receiving chamber 44 in the width direction. The hook portion 26 of the extension 25 also engages with the lower edge of the inner wall portion 42 from the opposite side of the busbar receiving chamber 44 in the width direction. Through the above-described engaging action, the separation of the side wall member 11 from the base member 10 in the width direction is restricted. Therefore, even if the side wall member 11 is to thermally deform in the direction away from the base member 10 due to factors such as rising ambient temperature, such deformation can be prevented. Thus, it is possible to prevent the electrical connection box A from becoming too large in the width direction.

[0036] like Figure 4 As shown, a pair of heat dissipation spaces 65 are formed between the base component 10 and the sidewall component 11. Each heat dissipation space 65 is smaller in the left-right direction than in the up-down and front-back directions. The lower end of the heat dissipation space 65 opens onto the lower end face of the main body 19 of the retaining component 18. The upper end of the heat dissipation space 65 communicates with the device housing chamber 12. The busbar housing chamber 44 and the heat dissipation space 65 are connected through the space between the upper end of the housing recess 46 and the upper end of the protrusion 22.

[0037] Due to the temperature difference between the outside and inside of the main body 19, the cooler outside air flows into the heat dissipation space 65 through the opening on the lower end face of the main body 19, generating an upward airflow. If the busbar 50 generates heat due to power-on, and the temperature of the busbar housing chamber 44 rises, the airflow in the heat dissipation space 65 absorbs the heat from the busbar housing chamber 44 through the gap between the housing recess 46 and the protrusion 22, flows into the device housing chamber 12, and is then released into the atmosphere through the opening on the upper surface of the main body 19.

[0038] <Function and Effect of the Examples> The electrical connection box A of this embodiment includes a base component 10 for mounting electrical devices 13, and a pair of side wall components 11 mounted on the base component 10 such that they are clamped into the base component 10 in the width direction. The base component 10 and the pair of side wall components 11 form a device storage chamber 12 for housing the electrical devices 13. The base component 10 has a protrusion 22 protruding from its outer surface in the width direction. A storage recess 46 for housing the protrusion 22 is formed in the side wall components 11. According to this structure, by housing the protrusion 22 within the storage recess 46, the width dimension is reduced by an amount corresponding to the protrusion dimension of the protrusion 22, thus enabling miniaturization.

[0039] A busbar 50 is housed inside the sidewall member 11. When the base member 10 is separated from the sidewall member 11, the receiving recess 46 opens to expose a portion of the busbar 50. With this structure, since there is no partition wall between the protrusion 22 and the busbar 50, miniaturization in the width direction is achieved. The busbar 50 has a base plate portion 51 and a heat dissipation plate portion 52 configured to overlap with the base plate portion 51. The heat dissipation plate portion 52 is configured to face the receiving recess 46. Since a heat dissipation space 65 is formed between the base member 10 and the sidewall member 11, heat from the heat dissipation plate portion 52 can be released from the receiving recess 46 into the heat dissipation space 65.

[0040] The base component 10 is provided with a hook portion 26 and a guide rib 24, which serve as a limiting portion for the side wall component 11 to move away from the base component 10 in the width direction. Even if the side wall component 11 is to bend and deform in a manner that allows it to move away from the base component 10, bending and deformation of the side wall component 11 can be prevented by the hook portion 26 hooking onto the inner wall portion 42 and the guide rib 24 hooking onto the guide rail 47. As a result, the width dimension can be prevented from expanding due to deformation of the side wall component 11.

[0041] The outer surface of the sidewall member 11 has an outermost region 58 that is furthest from the base member 10 in the width direction. The hook portion 26 and guide rib 24, which serve as exit limits, are only disposed in the region closer to the base member 10 than the outermost region 58. Therefore, it is possible to prevent the width dimension of the electrical connection box A from expanding due to the presence of the hook portion 26 and guide rib 24.

[0042] [Other Embodiments] This invention is not limited to the embodiments described above and in the accompanying drawings, but is illustrated by the claims. The invention includes all meanings equivalent to the claims and all modifications thereof, as well as the embodiments described below. In the above embodiments, the storage recess is connected to the busbar storage chamber, but the storage recess may not be connected to the busbar storage chamber. In the above embodiment, the heat sink faces the receiving recess, but the heat sink can also be configured in a position that does not face the receiving recess. In the above embodiments, the base component is provided with a departure restriction part, but the base component may also not have a departure restriction part. In the above embodiments, a heat dissipation space is formed between the base component and the sidewall component, but it is also possible that no heat dissipation space is formed between the base component and the sidewall component. Explanation of reference numerals in the attached figures

[0043] A… Electrical connection box 10…base components 11…Side wall components 12… Component Storage Room 13… Electrical Components 14…Front side fitting part 15… Rear fitting part 16…Front Embedded Part 17… Rear Embedded Part 18…Retaining components 19…Main Body 20…Front panel 21…Rear panel 22…Protrusion 23…outermost cavity 24…Guide rib (leaving the restriction section) 25…Extension 26… Hook section (removal from restriction section) 27…Guide groove 28…stop hole 30…Terminal block 31…Support plate section 32…Receiving Board Section 33… Bolt hole 34…groove section 35… Storage space 36…board 37…plate-shaped power supply section 38…plate mounting section 39… Mounting holes 40…Side wall main body 41…Outer wall section 42…Inner wall part 43… Locking part 44…Convergence Storage Room 45…Busbar installation port 46… Storage recess 47…guide rail 50…busbars 51…Substrate part 52…Heat Discharge Plate Section 53…Connecting plate section 54… punctum 55… Support section 56… Through hole 57…Expansion Section 58…outermost region 59… Fuse Storage Room 60…fuse 61…lead wire 65…heat dissipation space 66… Bolt 67…nut

Claims

1. An electrical connection box, comprising: Base components, which mount electrical devices; and A pair of sidewall members, the pair of sidewall members being mounted to the base member in such a way that they are clamped into the base member in the width direction. The base component and the pair of sidewall components form a device storage chamber for housing the electrical devices. The base component has a protrusion that extends from the outer side of the base component along the width direction. The protrusion forms the outermost cavity located along the outer surface of the base component in the width direction. The sidewall component has a receiving recess for receiving the protrusion.

2. An electrical connection box, wherein, have: Base components, which mount electrical devices; and A pair of sidewall members, the pair of sidewall members being mounted to the base member in such a way that they are clamped into the base member in the width direction. The base component and the pair of sidewall components form a device storage chamber for housing the electrical devices. The base component has a protrusion that extends from the outer side of the base component along the width direction. A receiving recess for receiving the protrusion is formed in the sidewall component. A busbar storage chamber is formed inside the sidewall component. The busbar storage chamber is formed by an inner wall portion in the thickness direction and an outer wall portion in the width direction, and it stores the busbar. The receiving recess is formed in the inner wall portion and opens in such a way that the manifold receiving chamber communicates with the outside of the side wall component.

3. The electrical connection box according to claim 2, wherein, The busbar has a base plate portion and a heat sink portion configured to overlap with the base plate portion. The heat sink portion is configured to face the receiving recess. A heat dissipation space is formed between the base component and the sidewall component.

4. The electrical connection box according to any one of claims 1 to 3, wherein, The base component is provided with a departure restriction portion that restricts the sidewall component from leaving the base component in the width direction.

5. The electrical connection box according to claim 4, wherein, The outer surface of the sidewall component has an outermost region that is furthest from the base component in the width direction. The exit restriction portion is only located in the area on the side of the base component that is closer to the outermost region.

Images