WO2021006109A1

WO2021006109A1 - Electrical junction box

Info

Publication number: WO2021006109A1
Application number: PCT/JP2020/025608
Authority: WO
Inventors: 智博横田
Original assignee: 住友電装株式会社
Priority date: 2019-07-08
Filing date: 2020-06-30
Publication date: 2021-01-14
Also published as: JP2021013268A

Abstract

This electrical junction box is mounted in a vehicle, and is provided with a terminal block, a bus bar provided in the terminal block, and an electric component that is electrically connected to the bus bar, wherein: the terminal block includes an electric cable placement surface on which a terminal of an electric cable that is connected to a vehicle-mounted load mounted in the vehicle is placed, and a component placement surface on which the electric component is placed; the bus bar includes an electric-cable-side edge which is positioned on the electric cable placement surface and to which the terminal of the electric cable is connected, a component-side edge which is positioned on the component placement surface and to which the electric component is connected, and a linking edge linking the electric-cable-side edge and the component-side edge; a C-shape is formed by the electric-cable-side edge, the linking edge, and the component-side edge; and the length of the electric-cable-side edge is greater than the length of the component-side edge.

Description

Electrical junction box

The present disclosure relates to electrical junction boxes.
This application claims priority based on Japanese Application No. 2019-127129 filed on July 8, 2019, and incorporates all the contents described in the Japanese application.

The electric wires mounted on the vehicle and supplying power from the vehicle battery to each vehicle load in the vehicle are once connected to the electric junction box, branched at the electric junction box, and connected to each vehicle load. Such an electric junction box includes a bus bar inside, and a plurality of inserted electric wires are branched by being connected to the bus bar. (For example, Patent Document 1). The bus bar of the electric connection box of Patent Document 1 has the same type of parts (LA terminals of electric wires) connected to both ends thereof.

Japanese Unexamined Patent Publication No. 2013-223367

The electric connection box according to one aspect of the present disclosure is an electric connection box mounted on a vehicle, and includes a terminal block, a bus bar provided on the terminal block, and an electric component electrically connected to the bus bar. The terminal block includes an electric wire mounting surface on which terminals of electric wires connected to an in-vehicle load mounted on the vehicle are mounted, and a component mounting surface on which the electrical components are mounted. The bus bar is located on the electric wire mounting surface and is located on the electric wire side side to which the terminal of the electric wire is connected, the component side side which is located on the component mounting surface and is connected to the electric component, and the electric wire side. It includes a connecting side that connects the side and the component side, and the wire side, the connecting side, and the component side form a U shape, and the length of the wire side is the component side. Greater than the length of the side.

It is the schematic which shows the vehicle which mounted the electric junction box which concerns on Embodiment 1. It is a perspective view from the front side of an electric junction box. It is a rear view of an electric junction box. It is an exploded perspective view of an electric junction box. It is a top view of the electric junction box with the housing removed. It is a perspective view from the back side of a terminal block. It is a perspective view of Basba. It is a side view of Basba. It is a rear view of Basba. It is an enlarged explanatory view of the part of the pedestal in the cross section by AA in FIG. It is an enlarged explanatory view of the place (terminal fastening part) where the electric wire and the bus bar are fastened in the plan view.

[Issues to be solved by this disclosure]
The bus bar of the electric junction box of Patent Document 1 does not consider the case where different parts are connected to both ends thereof.

It is an object of the present disclosure to provide an electrical junction box including a bus bar capable of suitably connecting these different parts even when different parts are connected to both ends.

[Effect of the present disclosure]
According to one aspect of the present disclosure, the manufacturing efficiency of the electrical junction box can be improved.

[Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described. In addition, at least a part of the embodiments described below may be arbitrarily combined.

(1) The electric connection box according to one aspect of the present disclosure is an electric connection box mounted on a vehicle, and is electrically connected to a terminal block, a bus bar provided on the terminal block, and the bus bar. The terminal block includes an electric component, and the terminal block includes an electric wire mounting surface on which a terminal of an electric wire connected to an in-vehicle load mounted on the vehicle is mounted, and a component mounting surface on which the electric component is mounted. The bus bar is located on the electric wire mounting surface and is connected to the electric wire terminal, and is located on the component mounting surface and is connected to the electric component. A U-shape is formed by the electric wire side, the connecting side, and the component side, including a connecting side connecting the electric wire side and the component side, and the length of the electric wire side is It is larger than the length of the side side of the component.

In this embodiment, the bus bar includes the wire side side to which the terminal of the wire is connected and the component side side to which the electric component is connected, and the length of the wire side side is made larger than the length of the component side side. There is. Unlike the electrical components that are pre-stored in the electrical junction box, the wires that are connected to the in-vehicle load are inserted from outside the electrical junction box and connected to the bus bar provided inside the electrical junction box. At the time of assembling the vehicle, the terminal of the electric wire and the bus bar are fastened and connected by a bolt or the like. On the other hand, by making the length of the electric wire side side of the bus bar larger than the length of the component side side, for example, a locking structure such as a claw is provided at the tip of the electric wire terminal, and the size of the terminal is increased. Even in this case, the terminal of the electric wire can be reliably connected to the bus bar. Also, make the length of the wire side of the bus bar larger than the length of the component side, that is, the length of the component side that connects the electrical components stored in the electrical junction box in advance, from the length of the wire side. By making the size smaller, the bus bar can be shortened, the amount of material required for the bus bar can be reduced, and the electric junction box can be miniaturized. As described above, even when different parts are connected to both ends of the bus bar, it is possible to provide an electric junction box including the bus bar to which these different parts can be suitably connected.

(2) In the electrical connection box according to one aspect of the present disclosure, the terminal block includes an outer peripheral surface interposed between the electric wire mounting surface and the component mounting surface, and the bus bar has the connecting side. It is provided on the terminal block so as to be located on the outer peripheral surface.

In this embodiment, the terminal block includes an outer peripheral surface interposed between the electric wire mounting surface and the component mounting surface, and the bus bar is provided on the terminal block with the connecting side positioned on the outer peripheral surface. Therefore, a U-shaped bus bar can be provided along the wire mounting surface, the outer peripheral surface, and the component mounting surface of the terminal block, and the electric bus bar is compared with the case where the bus bar is included in the terminal block. The structure of the junction box can be simplified. By fitting the opening side formed by the U-shape of the bus bar toward the outer peripheral surface of the terminal block, the bus bar can be easily attached to the terminal block and the manufacturing efficiency of the electric junction box is improved. Can be done.

(3) In the electrical junction box according to one aspect of the present disclosure, the connecting side has an asymmetrical shape in the longitudinal direction, and the outer peripheral surface is formed with a groove in which the connecting side is aligned. ..

In this embodiment, the connecting side of the bus bar has an asymmetrical shape in the longitudinal direction, and a groove is formed on the outer peripheral surface of the terminal block so that the connecting sides are aligned. Therefore, due to the shape of the connecting side of the bus bar and the groove on the outer peripheral surface, it is possible to form an erroneous assembly prevention structure that prevents the bus bar from being reversely attached in the longitudinal direction of the connecting side.

(4) The electrical junction box according to one aspect of the present disclosure has a crank-shaped connecting side.

In this embodiment, the connecting side of the bus bar is crank-shaped, and the groove on the outer peripheral surface formed so that the connecting sides are aligned is also crank-shaped. The connecting side of the bus bar has an asymmetrical shape in the longitudinal direction, for example, by making the lengths from both ends of the connecting side to the bending portion forming the crank different. Therefore, with a simple structure, it is possible to form an erroneous assembly prevention structure that prevents the bus bar from being reversely attached in the longitudinal direction of the connecting side.

(5) In the electric connection box according to one aspect of the present disclosure, the electric wire side side includes a terminal fastening portion provided with a hole for fastening the terminal of the electric wire, and the terminal fastening portion and the electric wire. The area of the electric wire mounting surface between the side side and the bent portion by the connecting side is provided with an fitting hole into which the claw portion provided at the terminal of the electric wire is fitted.

In this embodiment, a fitting hole for fitting a claw portion provided at the terminal of the electric wire is provided in the area of the electric wire mounting surface between the terminal fastening portion and the bent portion by the electric wire side side and the connecting side. ing. Therefore, by fitting the claw portion provided in the terminal of the electric wire into the fitting hole, it is possible to suppress the rotation of the terminal when the terminal is fastened by a bolt or the like. Further, since the length of the wire side of the bus bar is larger than the length of the component side, even if the wire is provided with a claw on the terminal in this way, the terminal can be used as the terminal on the wire side. It can be securely fastened to the fastening portion.

(6) In the electric connection box according to one aspect of the present disclosure, the electric wire side side includes a terminal fastening portion provided with a hole for fastening the terminal of the electric wire, and the terminal fastening portion includes the terminal fastening portion. A notch that engages with a protrusion that protrudes from the wire mounting surface is provided.

In this embodiment, the electric wire side side of the bus bar includes a terminal fastening portion provided with a hole for fastening the terminal of the electric wire, and the terminal fastening portion has a protrusion protruding from the electric wire mounting surface. A notch for locking is provided. Therefore, it is possible to form a disconnection prevention structure for preventing the bus bar from coming off from the terminal block by the notch provided in the terminal fastening portion on the side of the electric wire and the protrusion protruding from the electric wire mounting surface.

(7) In the electric junction box according to one aspect of the present disclosure, the electric wire connects a power storage device mounted on the vehicle and the vehicle-mounted load, and the power storage device is a high-voltage battery. The bus bar is a bus bar for high pressure.

In this embodiment, the power storage device is a high-voltage battery, and the bus bar is a high-voltage bus bar. Therefore, it is possible to improve the manufacturing efficiency when incorporating the high-voltage electric junction box including the high-voltage bus bar into the vehicle.

[Details of Embodiments of the present disclosure]
A specific example of the electrical connection box 1 according to the embodiment of the present disclosure will be described below with reference to the drawings. It should be noted that the present disclosure is not limited to these examples, but is indicated by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

(Embodiment 1)
FIG. 1 is a schematic view showing a vehicle equipped with the electrical junction box according to the first embodiment. The electric junction box 1 in the present embodiment is mounted on the vehicle C, and is provided between the power storage device 100 mounted on the vehicle C and the plurality of vehicle-mounted loads 101. The power storage device 100 and the plurality of vehicle-mounted loads 101 are electrically connected to each other by electric wires 102 connecting them via an electric connection box 1 and an electric junction box 1.

The power storage device 100 is, for example, a high-pressure battery for EV (Electric Vehicle) such as a lead battery or a lithium ion battery.

The in-vehicle load 101 is, for example, an in-vehicle device such as a drive motor, an in-vehicle air conditioner, an in-vehicle ECU, or an in-vehicle relay device. The plurality of vehicle-mounted load 101 devices are connected in parallel to each other, and the voltage output from the power storage device 100 is applied to the vehicle-mounted load 101 device via the electrical junction box 1.

The electric junction box 1 is interposed between the power storage device 100 and the plurality of vehicle-mounted load 101 devices, and the electric junction box 1 and the power storage device 100 are connected to each other via the connector 4 of the electric connection box 1. .. The electric junction box 1 and the power storage device 100 are connected by an electric wire 102 on the positive electrode side of the power storage device 100 and an electric wire 102 on the negative electrode side of the power storage device 100. Similarly, the electric junction box 1 and the plurality of vehicle-mounted loads 101 connected in parallel are each connected by a branched positive electrode side electric wire 102 and a branched negative electrode side electric wire 102.

The electric wire 102 on the positive electrode side housed in the electric connection box 1 is branched into a plurality of branches (four branches on FIG. 1) in the electric connection box 1. Similarly, the electric wire 102 on the negative electrode side housed in the electric junction box 1 is branched into a plurality of branches (four branches on FIG. 1) in the electrical junction box 1. A parallel circuit is formed by connecting the vehicle-mounted loads 101 to each of the branched electric wires 102.

The electric junction box 1 includes an electric component 11 such as a fuse, a relay, or a semiconductor switch, and the electric component 11 is provided on each of the branched electric wires 102 on the positive electrode side. The installation location of the electric component 11 such as a fuse on the circuit is not limited to the positive electrode side, and may be the negative electrode side.

In the electric junction box 1 configured in this way, for example, when a short circuit occurs in any of the vehicle-mounted loads 101, the fuse melts in response to the overcurrent, and the electric wire 102 to which the vehicle-mounted load 101 is connected is connected. It functions as a protective device by electrically blocking the path, and is particularly useful for EVs and the like equipped with a high-voltage battery.

FIG. 2 is a perspective view from the front side of the electrical connection box 1. FIG. 3 is a rear view of the electrical connection box 1. FIG. 4 is an exploded perspective view of the electrical connection box 1. In this embodiment, for convenience, the electrical junction box is "front", "rear", "left", "right", and "upper" according to the front-back, left-right, and up-down directions shown in FIGS. 2, 3, 4, and the like. , "Bottom" are defined. In the following, the front-back, left-right, and up-down directions defined in this way will be used for explanation. The electrical junction box 1 includes a terminal block 2 to which an electric wire 102 is fastened and a housing 6 that covers a part of the terminal block 2.

The housing 6 is made of a metal having high heat dissipation such as aluminum, and has a box shape having an opening 61 formed therein. The bottom plate of the housing 6 is provided with a rectangular parallelepiped protruding portion 62 provided with a plurality of insertion holes 63 for inserting the electric wire 102. The bottom plate of the housing 6 has a rectangular shape, and in the bottom plate, the protruding portion 62 is provided at a position biased toward the peripheral edge side in the longitudinal direction (biased to the left side on the paper in FIG. 2) with respect to the central portion. ..

The insertion holes 63 are arranged side by side on the surface of the protrusion 62 in two upper and lower stages so as to be evenly spaced from each other (six rows in the upper and lower two stages in FIG. 2). That is, the insertion holes 63 have a plurality of pairs of insertion holes 63, which are two in the lateral direction (two in the upper and lower directions) on the surface of the rectangular protrusion 62 (in FIG. 2). , 6), are installed side by side.

Each of the electric wires 102 (see FIG. 1) connected to the vehicle-mounted load 101 (see FIG. 1) is inserted into the housing 6 through a plurality of insertion holes 63, passes through the inside of the housing 6, and then is provided on the terminal block 2. It will be concluded with each of the 5 bus bars described later. As described above, the electric junction box 1 and the plurality of vehicle-mounted loads 101 are connected by the branched positive electrode side electric wire 102 and the branched negative electrode side electric wire 102.

The positive electrode side electric wire 102 and the negative electrode side electric wire 102 connected to the same in-vehicle load 101 are two in the lateral direction (upper and lower two) on the surface of the protrusion 62, that is, a pair consisting of the upper and lower stages in the same row. It may be inserted into each of the insertion holes 63. For example, in the positive electrode side and negative electrode side electric wires 102 connected to the same in-vehicle load 101, the positive electrode side electric wire 102 is inserted into the upper insertion hole 63 in the pair of insertion holes 63, and the negative electrode side electric wire 102 is It may be inserted into the lower insertion hole 63 in the pair of insertion holes 63.

The terminal block 2 is made of, for example, an insulating synthetic resin such as polyester, has side wall portions 22 at both left and right ends of a plate-shaped base portion 21, and has a rectangular parallelepiped box shape in which the side covered by the housing 6 is open. It is made up. The terminal block 2 includes a plurality of guide walls 3, a plurality of partition plates 24, and a connector 4, and a bus bar 5 to which an electric wire 102 is fastened is provided between the adjacent partition plates 24. The structural details of the terminal block 2 will be described in detail in FIGS. 6 and 6 and later.

As shown in FIG. 3, on the back side of the terminal block 2, bus bars 5 to which a plurality of inserted electric wires 102 are fastened are provided side by side at equal intervals. The electric wire 102 is fastened to one end side (wire side side 51 / see FIG. 7) of the bus bar 5, and the electric component 11 is fastened to the other end side (part side side 52 / see FIG. 7). Therefore, the bus bar 5 electrically connects the electric wire 102 and the electric component 11. The connecting portion (connecting side 53 / see FIG. 7) interposed between one end and the other end of the bus bar 5 is placed on the outer peripheral surface 27 located on the back surface side of the terminal block 2. As shown in FIG. 1, since the housing 6 is provided so as to cover a part of the terminal block 2 from the front side where the guide wall 3 is provided, the bus bar 5 provided on the back side of the terminal block 2 is provided. It is exposed without being housed in the housing 6. The electrical component 11 connected to the bus bar 5 is a tubular fuse, and like the bus bar 5, the electrical component 11 is exposed without being housed in the housing 6.

As shown in FIG. 4, the housing 6 is provided so that the opening 61 faces the terminal block 2 and covers the terminal block 2 from the side where the guide wall 3 is provided. Therefore, the housing 6 is provided so as to cover a part of the guide wall 3 and a storage portion for accommodating the conductive member connecting the connector 4 and the electric wire 102. Since the housing 6 does not cover the terminal block 2 from the side where the partition plate 24 is provided, the partition plate 24 is exposed. That is, the terminal block 2 is provided so as to be inserted into the housing 6 from the side where the guide wall 3 is provided, and the portion of the terminal block 2 where the guide wall 3 is provided is housed in the housing 6. Will be done. The electrical junction box 1 formed by engaging the terminal block 2 and the housing 6 in this way is mounted on the vehicle C, for example, by fastening the housing 6 of the electrical junction box 1 to the frame of the vehicle C or the like. To.

FIG. 5 is a plan view of the electrical connection box 1 with the housing 6 removed. In FIG. 5, the housing 6 is removed from the electrical connection box 1, and the terminal block 2 in a state where the electric wires 102 are fastened is shown.

The terminal block 2 includes a plate-shaped base portion 21, and side wall portions 22 are provided on each of the left and right end portions of the base portion 21, and the base portion 21 and the side wall portions 22 each form a U-shape in a cross-sectional view. To make.

The terminal block 2 includes a plurality of bus bars 5 to which a plurality of electric wires 102 inserted from the housing 6 are fastened, and these plurality of bus bars 5 are provided on the pedestal 23. The bus bar 5 is a plate-shaped member made of a highly conductive metal such as copper, and the bus bar 5 and the connector 4 are electrically connected in the electrical connection box 1. The electric wire 102 and the bus bar 5 are fastened by bolting the LA terminal 103 provided at the tip of the electric wire 102 and the pedestal 23 on which the bus bar 5 is placed. The bus bar 5 may be a high voltage bus bar 5 having an electric capacity corresponding to a high voltage battery.

A step is formed by the pedestal 23 to which the electric wire 102 on the positive electrode side is fastened and the pedestal 23 (see FIG. 10) to which the electric wire 102 on the negative electrode side is fastened. As described above, each of the plurality of electric wires 102 includes the positive electrode side electric wire 102 and the negative electrode side electric wire 102, and is connected to the same in-vehicle load 101 by the positive electrode side electric wire 102 and the negative electrode side electric wire 102. The electric wire 102 is configured. In the present embodiment, the pedestal 23 to which the electric wire 102 on the positive electrode side is fastened is located on the upper stage side, and the pedestal 23 to which the electric wire 102 on the negative electrode side is fastened is located on the lower stage side. However, the present invention is not limited to this, and the pedestal 23 on the negative electrode side may be located on the upper stage side and the pedestal 23 on the positive electrode side may be located on the lower stage side.

The fastening portion where the bus bar 5 on the positive electrode side and the electric wire 102 are fastened is partitioned and arranged by a partition plate 24. Adjacent fastening portions on the positive electrode side (bus bars 5 on the positive electrode side) are insulated from each other by the partition plate 24. That is, the partition plate 24 functions as an insulating wall that insulates two adjacent fastening portions. Similarly, the fastening portions of the electric wires on the negative electrode side are also partitioned and arranged by the partition plate 24, and are insulated from each other. The pair of electric wires 102 on the positive electrode side and the negative electrode side connected to the same vehicle-mounted load 101 are arranged in the same row in a plurality of rows formed by the partition plate 24. Therefore, the positive electrode side and negative electrode side fastening portions to which the pair of electric wires 102 are fastened are separated from other fastening portions by the same partition plate 24.

A connector 4 connected to the power storage device 100 is provided on the outer surface of one side wall portion 22. The connector 4 has a bottomed tubular shape, and the bottom of the connector 4 is provided with a storage portion for accommodating a conductive member that connects the connector 4 and the electric wire 102. The storage portion may be provided so as to protrude on the housing 6 side from the housing 6 side end portion of the base portion 21. The connector 4 and each of the bus bars 5 are connected by an L-shaped bus bar provided in the center of the upper surface of the base portion 21 and a conductive member housed in the storage section.

A plurality of guide walls 3 are provided so as to project from the base 21 of the terminal block 2. The plurality of guide walls 3 have a plate shape, and are provided side by side between the side wall portions 22 so that their side surfaces face each other. Each of the plurality of guide walls 3 is provided so that the side surface of the guide wall 3 follows the insertion direction of the electric wire 102 to be inserted. That is, each of the plurality of guide walls 3 is provided so as to extend from the housing 6 side toward the bus bar 5 side on the upper surface of the base 21, and the adjacent guide walls 3 are arranged side by side with their side surfaces facing each other. It is installed. By arranging the adjacent guide walls 3 so as to face each other with their side surfaces facing each other, an insertion space through which the electric wire 102 is inserted is formed between the side surfaces of the adjacent guide walls 3. Therefore, the electric wire 102 inserted through the insertion hole 63 of the housing 6 is guided by the guide wall 3, passes by the side surface (insertion space) of the guide wall 3, and then is located next to the side surface of the partition plate 24. It is concluded to the bus bar 5.

FIG. 6 is a perspective view from the back side of the terminal block 2. FIG. 6 shows the terminal block 2 from the outer peripheral surface 27 side, which is the back side of the electrical connection box 1, in a state where the electric wire 102 and the bus bar 5 are removed from the terminal block 2. As described above, the terminal block 2 includes a plurality of guide walls 3 provided on the plate-shaped base portion 21, side wall portions 22 provided at both ends of the base portion 21, and a pedestal 23 provided on these side wall portions 22. .. Since the pedestal 23 is provided in the extending direction of the side-by-side guide walls 3, the electric wire 102 inserted into the electric connection box 1 is guided by the guide wall 3 to the bus bar 5 mounted on the pedestal 23. Will be done.

The pedestal 23 has a rectangular parallelepiped shape and includes an electric wire mounting surface 25, a component mounting surface 26, and an outer peripheral surface 27 located between the electric wire mounting surface 25 and the component mounting surface 26. The pedestal 23 is provided so as to form a part of the outer shell of the terminal block 2. Therefore, the outer peripheral surface 27 of the pedestal 23 constitutes the outer peripheral surface 27 (a part of the side surface) on the back surface side of the terminal block 2.

The electric wire mounting surface 25 is partitioned by a partition plate 24, and is partitioned into six regions in FIG. That is, each of the partitioned electric wire mounting surfaces 25 is located between the adjacent partition plates 24, or between the side wall portions 22 located at both ends and the partition plate 24 closest to the side wall portion 22. To do.

Like the electric wire mounting surface 25, the component mounting surface 26 is partitioned into six regions by a partition plate 24 (partition plate 24 on the component mounting surface 26 side) provided downward on the drawing. .. In the rectangular parallelepiped pedestal 23, the component mounting surface 26 is located on the opposite side of the wire mounting surface 25.

The outer peripheral surface 27 is interposed between the electric wire mounting surface 25 and the component mounting surface 26. On the outer peripheral surface 27, a groove 271 for fitting the connecting side 53 of the bus bar 5, which will be described later, is formed from the component mounting surface 26 toward the electric wire mounting surface 25 corresponding to the component mounting surface 26. ing. Since the connecting side 53 of the bus bar 5 has a crank shape, the groove 271 formed on the outer peripheral surface 27 also has a crank shape. The corresponding component mounting surface 26 and the electric wire mounting surface 25, that is, the electric wire mounting surface 25 on which the electric wire 102 to be fastened to the bus bar 5 is mounted, and the electric component 11 to be fastened to the bus bar 5 are mounted. The electric wire mounting surface 25 is arranged so as to be in the same row via a groove 271 formed on the outer peripheral surface 27.

FIG. 7 is a perspective view of the bus bar 5. FIG. 8 is a side view of the bus bar 5. FIG. 9 is a rear view of the bus bar 5. As described above, the bus bar 5 is made of a metal having good conductivity such as copper and has a U shape. The bus bar 5 includes an electric wire side side 51, a component side side 52, and a connecting side 53 located between the electric wire side side 51 and the component side side 52. The wire side 51 corresponds to the upper short side in the U shape, the component side 52 corresponds to the lower short side in the U shape, and the connecting side 53 corresponds to the long side in the U shape. The connecting side 53, the electric wire side side 51, and the component side side 52 are bent so that the angles of these sides are at right angles to form a U-shape, and a predetermined position is formed at the bent portion. A bent portion 54 having a bending R (bending radius) is formed.

The electric wire side side 51 includes a terminal fastening portion 511 to which the LA terminal 103 of the electric wire 102 is fastened, and a base end portion 514 having a width narrower than that of the terminal fastening portion 511. The base end portion 514 is provided on the connecting side 53 side and is continuous with the bent portion 54. Therefore, on the electric wire side side 51, the terminal fastening portion 511 is provided on the tip end side of the base end portion 514. In the plate width perpendicular to the extending direction of the electric wire side side 51, the plate width of the terminal fastening portion 511 is larger than the plate width of the base end portion 514.

At the center of the terminal fastening portion 511, a hole portion 512 for inserting a bolt for fastening to the LA terminal 103 is provided. A notch 513 is provided on the side edge of the terminal fastening portion 511. As shown in FIGS. 7 and 9, the base end portion 514 is biased toward the side edge where the notch portion 513 is provided. That is, the distance (a2) between the side edge (right side edge) where the notch 513 of the terminal fastening portion 511 is provided and the end portion of the base end portion 514 located on the side of the side edge is the terminal fastening. Than the distance (a1) between the side edge (left side edge) where the notch 513 of the portion 511 is not provided and the end portion of the base end portion 514 located on the side of the side edge (left side edge). , Small (a1> a2).

The component side side 52 includes the terminal fastening portion 521 and the base end portion 524, similarly to the electric wire side side 51. The terminal fastening portion 521 of the component side 52 is provided with a hole portion 522 into which a bolt for fastening the terminal of the electrical component 11 is inserted. A notch 523 is provided on the side edge of the terminal fastening portion 521 of the component side side 52. The cutout portion 523 of the component side side 52 is provided on the side edge located opposite to the side edge provided with the cutout portion 513 of the electric wire side side 51 in a plan view.

As shown in FIG. 9, the bent portion 54 on the side of the component side 52 has a side edge (left side edge) provided with the notch 523 and a side edge (right side) without the notch 523. It is provided so as to be located in the center with the side edge). That is, the distance (b1) between the side edge (left side edge) where the notch 523 of the component side 52 is provided and the bent portion 54 located on the side of the side edge (left side edge) is , The distance (b2) between the side edge (right side edge) on which the notch 523 of the component side side 52 is not provided and the end portion of the bent portion 54 located on the side of the side edge (right side edge). ) And the same (b1 = b2).

As shown in FIG. 8, the length of the electric wire side side 51 in the longitudinal direction (extension direction of the electric wire side 51: a3) is the length of the component side 52 in the longitudinal direction (extension direction of the component side 52: b3). It's bigger than that. The base end portion 514 of the electric wire side side 51 extends more than the base end portion 524 of the component side side 52 so that the longitudinal direction of the electric wire side side 51 is larger than the longitudinal direction of the component side side 52 (a3> b3). Has been done.

The connecting side 53 is composed of a plate member forming a crank shape. The electric wire side side 51 and the component side side 52 are located at both ends of the connecting side 53 in the longitudinal direction. The left and right bent portions of the crank formed on the connecting side 53 are provided so as to be biased toward the component side 52 from the central portion in the longitudinal direction of the connecting side 53. Therefore, the bending portion to the component side 52 The distance to is smaller than the distance from the bent portion to the electric wire side side 51. By providing the bent portion of the crank in this way, the connecting side 53 is configured to be asymmetrical in the longitudinal direction (vertical direction on the drawing). The bent portion may be configured so that the connecting side 53 is asymmetrical in the longitudinal direction by providing the bending portion so as to be biased toward the electric wire side side 51 with respect to the central portion in the longitudinal direction of the connecting side 53. ..

In order to make the connecting side 53 asymmetric in the longitudinal direction, the connecting side 53 is formed into a crank shape, and the bent portion of the crank is provided so as to be offset from the central portion in the longitudinal direction of the connecting side 53 to the component side 52 or the electric wire side 51. However, it is not limited to this. The connecting side 53 may be a straight line having no bent portion, and a hole may be provided in the connecting side 53 so as to be biased toward the component side side 52 or the electric wire side side 51 rather than the central portion in the longitudinal direction. In this case, the outer peripheral surface 27 of the pedestal 23 is provided with a convex portion at a position corresponding to the hole provided in the connecting side 53, and when the bus bar 5 is fitted into the pedestal 23, the convex portion is formed on the connecting side 53. The convex portion and the hole may be engaged with each other by being fitted into the hole provided in the.

The size of the plate width of the connecting side 53 in the region from the bent portion of the crank to the wire side side 51 (the length in the lateral direction) and the size of the plate width of the connecting side 53 in the region from the bent portion to the component side side 52. (Length in the lateral direction) is the same value. The plate thickness of the connecting side 53 is set to the same value at each location. Therefore, in the longitudinal direction of the connecting side 53, the cross-sectional area of the connecting side 53 in the region of the electric wire side side 51 and the region of the component side 52 is set to the same value with respect to the bent portion of the crank, and the portion of the connecting side 53 It is possible to suppress an increase in the resistance value.

FIG. 10 is an enlarged explanatory view of the portion of the pedestal 23 in the cross section taken along the line AA in FIG. In FIG. 10, the connection state of the LA terminal 103, the bus bar 5, and the electric component 11 of the electric wire 102 on the pedestal 23 on the upper stage side is shown by a schematic side sectional view.

The U-shaped bus bar 5 is fitted from the outer peripheral surface 27 of the pedestal 23 and attached to the pedestal 23. The electric wire side 51 of the bus bar 5 is placed on the electric wire mounting surface 25 of the pedestal 23. The component side 52 of the bus bar 5 is mounted on the component mounting surface 26 of the pedestal 23. The connecting side 53 of the bus bar 5 is fitted inside a groove 271 (see FIG. 6) provided on the outer peripheral surface 27 of the pedestal 23.

The LA terminal 103 of the electric wire 102 is fastened to the electric wire side side 51 with bolts. The terminals of the electric component 11 are fastened to the component side 52 with bolts.

The claw portion 104 located at the tip of the LA terminal 103 is fitted (inserted) into the fitting hole 251 provided in the electric wire mounting surface 25 of the pedestal 23, so that the LA terminal 103 and the pedestal 23 are engaged with each other. There is. In this way, when the claw portion 104 of the LA terminal 103 is inserted into and engaged with the fitting hole 251 provided in the electric wire mounting surface 25 of the pedestal 23 to rotate and fasten the bolt, the LA terminal 103 is engaged. It can be prevented from turning (stopping turning).

In order to make the length of the electric wire side 51 in the longitudinal direction larger than the length of the component side 52 in the longitudinal direction, the base end portion 514 of the electric wire side side 51 extends more than the base end portion 514 of the component side side 52. Has been done. By extending the base end portion 514 of the electric wire side side 51 in this way, the fitting hole 251 (non-engaging portion) for fitting (engaging) the claw portion 104 (engaging portion) on the electric wire mounting surface 25. ) Can be secured.

The length of the component side 52 in the longitudinal direction is smaller than the length of the wire side 51 in the longitudinal direction. Therefore, by shortening the length of the component side 52 in the bus bar 5 in the longitudinal direction, the amount of material for molding the bus bar 5 is reduced, the weight of the electric junction box 1 is reduced, and the manufacturing cost is reduced. Can be done.

In the manufacturing process, when the electrical junction box 1 is incorporated into the vehicle C, the electrical component 11 and the bus bar 5 are already mounted on the electrical junction box 1. Then, the electric wire 102 connected to the vehicle-mounted load 101 is inserted into the electric connection box 1, and the inserted electric wire 102 is fastened to the bus bar 5. Therefore, the electric wire side 51 of the bus bar 5 corresponds to a portion to be fastened when the electric connection box 1 is incorporated into the vehicle C. The component side 52 of the bus bar 5 corresponds to a portion that has already been fastened before the electrical junction box 1 is incorporated into the vehicle C. Since the length of the electric wire side side 51 in the longitudinal direction is larger than the length of the component side 52 in the longitudinal direction, the area related to the portion to be fastened in the process of incorporating the electric connection box 1 into the vehicle C is increased. , The manufacturing efficiency of the manufacturing worker who performs the process can be improved.

The connecting side 53 of the bus bar 5 is fitted inside a groove 271 (see FIG. 6) provided on the outer peripheral surface 27 of the pedestal 23. As described above, the connecting side 53 of the bus bar 5 has a crank shape and has an asymmetrical shape in the longitudinal direction of the connecting side 53. As shown in FIG. 6, the groove 271 provided on the outer peripheral surface 27 of the pedestal 23 has a crank shape corresponding to the outer shape (periphery) of the connecting side 53. In this way, the connecting side 53 of the bus bar 5 is asymmetrical in the longitudinal direction, and the shape of the groove 271 provided on the outer peripheral surface 27 of the pedestal 23 is made to correspond to the outer shape (periphery) of the connecting side 53. However, it is possible to prevent so-called misassembly, that is, mounting in the opposite direction in the longitudinal direction. When the bus bar 5 is mounted in the opposite direction in the longitudinal direction, the component side 52 of the bus bar 5 is located on the wire mounting surface 25 of the pedestal 23, and the wire side 51 of the bus bar 5 is the component mounting surface 26 of the pedestal 23. It is located and can be installed.

FIG. 11 is an enlarged explanatory view of a portion (terminal fastening portion 511) where the electric wire 102 and the bus bar 5 are fastened in the plan view. On the electric wire mounting surface 25, the electric wire side 51 of the bus bar 5 and the LA terminal 103 of the electric wire 102 are placed in this order. Therefore, a laminated structure is formed by the electric wire mounting surface 25, the electric wire side side 51, and the LA end.

The region on the wire mounting surface 25 where the wire side side 51 and the LA end are not mounted is an exposed region in a plan view. As described above, since the base end portion 514 of the electric wire side side 51 is provided at a position deviated in the plate width direction of the electric wire side side 51, the exposed electric wire mounting surface 25 is provided at both side ends of the base end portion 514. The widths (widths of the electric wire side sides 51 in the plate width direction) in the respective regions (exposed regions) are different. The LA terminal 103 of the electric wire 102 is fitted into the fitting hole 251 provided in the electric wire mounting surface 25, and the fitting hole 251 is provided in a wide exposed region. In this way, the base end portion 514 of the electric wire side side 51 is provided at a position deviated in the plate width direction of the electric wire side side 51, and the fitting hole 251 is provided in the wide exposed region, whereby the hole diameter of the fitting hole 251 is increased. can do. By increasing the hole diameter of the fitting hole 251, the LA terminal 103 of the electric wire 102 is efficiently fitted (inserted) into the fitting hole 251 in the manufacturing process when the electric connection box 1 is incorporated into the vehicle C, and the manufacturing efficiency is improved. Can be made to.

The base end portion 514 of the electric wire side side 51 is provided unevenly in the width direction of the terminal fastening portion 511, so that the base end portion 514 is close to one side edge side of the terminal fastening portion 511. A notch 513 is provided on the side edge on the side where the base end portion 514 is close to the base end portion 514. A protrusion 252 is provided on the wire mounting surface 25 corresponding to the position of the notch 513.

The protrusion 252 is provided at a position surrounded by the inner wall of the notch 513 in a plan view. When the bus bar 5 is attached to the pedestal 23 of the terminal block 2, the protrusion 252 of the wire mounting surface 25 and the notch 513 of the wire side 51 engage with each other to attach the bus bar 5 to the pedestal 23 of the terminal block 2. It can be temporarily fixed.

Similarly, the component mounting surface 26 of the pedestal 23 is provided with an engaging portion such as a protrusion 252, and the component side 52 of the bus bar 5 is also engaged with a non-engaging portion such as a notch 523. Good. By engaging the engaging portion such as the protrusion 252 provided on the pedestal 23 of the electric junction box 1 with the engaged portion such as the notch 513 provided on the bus bar 5, the bus bar 5 and the terminal block 2 are engaged. And can be temporarily fixed to prevent the bus bar 5 from coming off the terminal block 2.

It should be considered that the embodiments disclosed this time are examples in all respects and are not restrictive. The scope of the present invention is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

C Vehicle 1 Electrical junction box 11 Electrical components 2 Terminal block 21 Base 22 Side wall 23 Pedestal 24 Partition plate 25 Wire mounting surface 251 Fitting hole 252 Protrusion 26 Parts mounting surface 27 Outer peripheral surface 271 Groove 3 Guide wall 4 Connector 5 Bus bar 51 Electric wire side 511 Terminal fastening part 512 Hole part 513 Notch part 514 Base end part 52 Component side side 521 Terminal fastening part 522 Hole part 523 Notch part 524 Base end part
53 Connecting side 54 Folded part 6 Housing 61 Opening 62 Protruding part 63 Insertion hole 100 Power storage device 101 In-vehicle load 102 Electric wire 103 LA terminal 104 Claw

Claims

An electrical junction box mounted on a vehicle
A terminal block, a bus bar provided on the terminal block, and an electric component electrically connected to the bus bar are provided.
The terminal block
An electric wire mounting surface on which terminals of electric wires connected to an in-vehicle load mounted on the vehicle are placed, and
Including the component mounting surface on which the electrical component is mounted,
The bus bar
The side of the wire that is located on the wire mounting surface and to which the terminals of the wire are connected,
The component side side located on the component mounting surface and to which the electrical component is connected,
Includes a connecting side that connects the electric wire side and the component side.
The wire side, the connecting side, and the component side form a U shape.
An electrical junction box in which the length of the side side of the electric wire is larger than the length of the side side of the component.
The terminal block includes an outer peripheral surface interposed between the electric wire mounting surface and the component mounting surface.
The electrical connection box according to claim 1, wherein the bus bar is provided on the terminal block with the connecting side positioned on the outer peripheral surface.
The connecting side has an asymmetrical shape in the longitudinal direction.
The electrical connection box according to claim 2, wherein a groove in which the connecting sides are aligned is formed on the outer peripheral surface.
The electrical connection box according to claim 3, wherein the connecting side has a crank shape.
The electric wire side side includes a terminal fastening portion provided with a hole for fastening the terminal of the electric wire.
An fitting hole for fitting a claw portion provided at the terminal of the electric wire is provided in the area of the electric wire mounting surface between the terminal fastening portion and the bent portion formed by the electric wire side side and the connecting side. The electric connection box according to any one of claims 1 to 4.
The electric wire side side includes a terminal fastening portion provided with a hole for fastening the terminal of the electric wire.
The electrical connection box according to any one of claims 1 to 5, wherein the terminal fastening portion is provided with a notch that engages with a protrusion projecting from the electric wire mounting surface.
The electric wire connects the power storage device mounted on the vehicle and the in-vehicle load.
The power storage device is a high-voltage battery.
The electrical connection box according to any one of claims 1 to 6, wherein the bus bar is a bus bar for high voltage.