Bus bar arrangement structure

Abstract

To provide a bus bar arrangement structure which can stabilize arrangement of a bus bar relative to an arrangement member and achieve improvement of cooling performance of the bus bar.SOLUTION: A bus bar arrangement structure 1 includes: a bus bar 3 arranged in an arrangement member 5; and a holding member 7 which holds the bus bar 3 and is fixed to the arrangement member 5. The holding member 7 has: a heat transfer part 15 which contacts with the bus bar 3 and to which heat from the bus bar 3 is transmitted; and a heat radiation part 19 which contacts with the arrangement member 5 to radiate heat transmitted to the heat transfer part 15 to the arrangement member 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bus bar arrangement structure. [Background technology]

[0002] Conventionally, a bus bar arrangement structure has been known that includes a bus bar arranged on the outer surface of a PCU housing as an arrangement member (see Patent Document 1). In this bus bar arrangement structure, both ends of the bus bar are electrically connected to and fixed to relays provided on the outer surface of the PCU housing. The bus bar has a narrowed portion whose cross-sectional area is smaller than that of other portions. When vibration occurs in the bus bar, the narrowed portion suppresses vibration at the narrowed portion and reduces the possibility of the bus bar coming into contact with surrounding components. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-15059 Summary of the Invention [Problem to be solved by the invention]

[0004] In the bus bar arrangement structure described in Patent Document 1, a narrowed portion is provided in the bus bar to suppress vibration of the bus bar, but the bus bar is not supported in any way when it is arranged relative to the arrangement member, resulting in unstable arrangement of the bus bar. Furthermore, the bus bar is a conductive member through which a large current flows, and generates a large amount of heat, which can affect the reliability of the electrical connection, so there is a need to improve the cooling performance of the bus bar.

[0005] The present invention has been made in view of the problems inherent in the conventional technology, and an object of the present invention is to provide a bus bar arrangement structure that can stabilize the arrangement of bus bars relative to an arrangement member and improve the cooling performance of the bus bars. [Means for solving the problem]

[0006] The bus bar arrangement structure of this embodiment comprises a bus bar arranged on an arrangement member, and a holding member that holds the bus bar and is fixed to the arrangement member, and the holding member has a heat transfer section that contacts the bus bar and transfers heat from the bus bar, and a heat dissipation section that contacts the arrangement member and dissipates the heat transferred to the heat transfer section to the arrangement member. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a bus bar arrangement structure that can stabilize the arrangement of the bus bar relative to the arrangement member and improve the cooling performance of the bus bar. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a front view of the bus bar arrangement structure according to the present embodiment. [Figure 2] FIG. 1 is a perspective view of a bus bar arrangement structure according to an embodiment of the present invention. [Figure 3] FIG. 2 is an exploded perspective view of the bus bar arrangement structure according to the present embodiment. [Figure 4] FIG. 10 is a front view showing another example of the bus bar arrangement structure according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The bus bar arrangement structure according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the sake of convenience and may differ from the actual proportions.

[0010] As shown in FIG. 1 , a bus bar arrangement structure 1 according to this embodiment is applied between a vehicle-side charging unit to which a charging connector of a charging facility for an electric vehicle or hybrid vehicle is fitted and a power source such as a rechargeable battery or battery. In recent years, power sources mounted on vehicles have increasingly become larger in capacity to improve driving range. Because large-capacity power sources require a long charging time, a bus bar 3 has been considered as a way to shorten the charging time by passing a large current through it. The bus bar 3 is arranged in a predetermined shape on a placement member 5, such as a vehicle body, between the vehicle-side charging unit and the power source. Because both ends of the bus bar 3 are electrically connected and fixed to the vehicle-side charging unit and the power source, the portion of the bus bar 3 that is placed on the placement member 5 is prone to vibration due to vehicle vibrations, resulting in unstable placement relative to the placement member 5. Furthermore, because a large current flows through the bus bar 3, it generates a large amount of heat, which may affect the reliability of the electrical connection. Therefore, it is necessary to improve the cooling performance of the bus bar 3. Therefore, the bus bar arrangement structure 1 according to this embodiment can stabilize the arrangement of the bus bar 3 relative to the arrangement member 5, and can improve the cooling performance of the bus bar 3.

[0011] As shown in FIGS. 1 to 3, the bus bar arrangement structure 1 includes a bus bar 3, a holding member 7, and a pressing member 9.

[0012] The bus bar 3 is made of a conductive material such as copper or aluminum, and is formed into a plate with a rectangular cross section. A plurality of bus bars 3 (two in this example) are used. One longitudinal end of the bus bar 3 is electrically connected to, for example, a power source mounted on the vehicle. The other longitudinal end of the bus bar 3 is electrically connected to, for example, a vehicle-side charging unit provided on the vehicle. The bus bar 3 is arranged on a placement member 5, such as the vehicle body, between the power source and the vehicle-side charging unit. The bus bar 3 is held by a holding member 7, and the holding member 7 is fixed to the placement member 5, thereby maintaining the placement position of the bus bar 3 relative to the placement member 5.

[0013] The holding member 7 is made of an insulating material such as synthetic resin. The holding member 7 is formed in a housing shape so that the busbar 3 and the pressing member 9 can be housed therein. The holding member 7 has openings on both sides in the longitudinal direction of the busbar 3 to expose the busbar 3 and an opening at the top to allow the busbar 3 and the pressing member 9 to be inserted therein. A fixing portion 13 having multiple (here, two) through holes 11 protrudes upward from the bottom surface at the center of the interior of the holding member 7. The fixing portion 13 extends along the longitudinal direction of the busbar 3, and its outer surface facing the busbar 3 is formed as an inclined surface that slopes downward from the top to the bottom surface. The inner surface of the holding member 7 that comes into contact with the busbar 3 serves as a heat transfer portion 15 to transfer heat generated in the busbar 3. The holding member 7 is placed in a groove-shaped placement portion 17 of the placement member 5. The outer surface of the holding member 7 that comes into contact with the arrangement portion 17 serves as a heat dissipation portion 19 that dissipates the heat of the bus bar 3 transferred from the heat transfer portion 15 to the arrangement member 5. With the bus bar 3 and the pressing member 9 assembled, the holding member 7 is fixed to the arrangement member 5 by inserting multiple (here, two) fastening members 21 made of bolts into the through holes 11 of the fixing portion 13 and fastening them to the arrangement member 5.

[0014] The pressing member 9 includes a closing portion 23 and a pressing portion 25 .

[0015] Closing portion 23 is made of an insulating material such as synthetic resin. Closing portion 23 is formed in a plate shape that can close the upper opening of holding member 7. Closing portion 23 has a plurality of (here, two) through holes 27 formed in positions corresponding to through holes 11 in fixing portion 13 of holding member 7. Closing portion 23 moves pressing portion 25 toward holding member 7 when fastening members 21 inserted through through holes 27 are fastened to arrangement member 5.

[0016] The pressing portion 25 is formed separately from the blocking portion 23 and is made of an insulating material such as synthetic resin. A plurality of pressing portions 25 (two in this example) are used corresponding to the busbar 3 used. The outer surface of the pressing portion 25 that contacts the busbar 3 is formed as a flat surface parallel to the outer surface of the busbar 3, and the outer surface that contacts the fixing portion 13 is formed as an inclined surface parallel to the inclined surface of the fixing portion 13. Note that the pressing portion 25 has a portion that is disposed between the busbar 3 and the blocking portion 23. Therefore, the blocking portion 23 does not contact the busbar 3, and therefore may be formed of a conductive material such as a metal material. When the fastening member 21 is fastened to the arrangement member 5, the pressing portion 25 moves toward the inside of the holding member 7 via the blocking portion 23. At this time, the inclined surface of the fixing portion 13 causes the pressing portion 25 to press the busbar 3 toward the heat transfer portion 15 of the holding member 7, thereby enhancing the adhesion between the busbar 3 and the heat transfer portion 15. Therefore, heat generated in the busbar 3 can be stably transferred to the heat transfer portion 15. Although the pressing portion 25 is formed separately from the blocking portion 23, the blocking portion 23 and the pressing portion 25 may be formed as a single continuous member.

[0017] Here, heat transfer members 29 that promote heat transfer are arranged between the busbar 3 and the heat transfer portion 15 and between the arrangement member 5 and the heat dissipation portion 19. The heat transfer member 29 is made of an insulating material, such as a synthetic resin with excellent heat conductivity, and is formed in a sheet shape. The heat transfer member 29 arranged between the busbar 3 and the heat transfer portion 15 is attached to the entire circumferential area of ​​the outer surface of the busbar 3 with an adhesive or the like. The heat transfer member 29 may also be attached to the entire heat transfer portion 15 with an adhesive or the like. The heat transfer member 29 arranged between the arrangement member 5 and the heat dissipation portion 19 is attached to the entire outer surface of the holding member 7 with an adhesive or the like. The heat transfer member 29 may also be attached to the entire inner surface of the arrangement portion 17 of the arrangement member 5 where the holding member 7 is arranged with an adhesive or the like. By placing the heat transfer member 29 between the busbar 3 and the heat transfer section 15 and between the positioning member 5 and the heat dissipation section 19, the transfer of heat generated in the busbar 3 to the positioning member 5 can be promoted, thereby improving the cooling performance of the busbar 3.

[0018] In this bus bar arrangement structure 1, the bus bar 3 is held by a holding member 7. The holding member 7 is fixed to the arrangement member 5. Therefore, the bus bar 3 is supported relative to the arrangement member 5 via the holding member 7, and the arrangement of the bus bar 3 relative to the arrangement member 5 can be stabilized. The holding member 7 has a heat transfer portion 15 that contacts the bus bar 3 and transfers heat from the bus bar 3, and a heat dissipation portion 19 that contacts the arrangement member 5 and dissipates the heat transferred to the heat transfer portion 15 to the arrangement member 5. Therefore, heat generated in the bus bar 3 can be efficiently dissipated to the arrangement member 5 via the heat transfer portion 15 and the heat dissipation portion 19 of the holding member 7, thereby improving the cooling performance of the bus bar 3. Note that if the cooling performance of the bus bar 3 can be improved, there is no need to increase the size of the bus bar 3 in consideration of the amount of heat generated by the bus bar 3, and the bus bar 3 can be made smaller.

[0019] In assembling such a bus bar arrangement structure 1 to the arrangement member 5, first, the bus bar 3 is assembled to the holding member 7. Next, the holding member 7 is arranged in the arrangement portion 17 of the arrangement member 5, and the pressing member 9 is assembled to the holding member 7. Note that the pressing member 9 may be assembled to the holding member 7 in advance before the holding member 7 is arranged on the arrangement member 5. Then, the fastening member 21 is fastened to the arrangement member 5 to fix the holding member 7 to the arrangement member 5, completing the assembly.

[0020] Such a bus bar arrangement structure 1 includes a bus bar 3 arranged on an arrangement member 5, and a holding member 7 that holds the bus bar 3 and is fixed to the arrangement member 5. The holding member 7 has a heat transfer section 15 that contacts the bus bar 3 and transfers heat from the bus bar 3, and a heat dissipation section 19 that contacts the arrangement member 5 and dissipates the heat transferred to the heat transfer section 15 to the arrangement member 5.

[0021] The bus bar 3 is held by a holding member 7 fixed to the arrangement member 5. Therefore, the bus bar 3 is supported relative to the arrangement member 5 via the holding member 7, and the arrangement of the bus bar 3 relative to the arrangement member 5 can be stabilized. The holding member 7 has a heat transfer section 15 to which heat from the bus bar 3 is transferred, and a heat dissipation section 19 that dissipates the heat transferred to the heat transfer section 15 to the arrangement member 5. Therefore, heat generated in the bus bar 3 can be efficiently dissipated to the arrangement member 5 via the heat transfer section 15 and the heat dissipation section 19 of the holding member 7, and the cooling performance of the bus bar 3 can be improved.

[0022] Therefore, in such a bus bar arrangement structure 1, the arrangement of the bus bar 3 with respect to the arrangement member 5 can be stabilized, and the cooling performance of the bus bar 3 can be improved.

[0023] Furthermore, the holding member 7 is fixed to the arrangement member 5 by fastening the fastening members 21. Between the bus bar 3 and the holding member 7, a pressing member 9 is arranged, which presses the bus bar 3 toward the heat transfer section 15 by fastening the fastening members 21.

[0024] Therefore, by pressing the busbar 3 with the pressing member 9 through fastening the fastening member 21, the adhesion between the busbar 3 and the heat transfer section 15 can be increased, and the heat generated in the busbar 3 can be stably transferred to the heat transfer section 15.

[0025] Furthermore, between the bus bar 3 and the heat transfer portion 15 and between the arrangement member 5 and the heat dissipation portion 19, heat transfer members 29 are arranged to promote heat transfer.

[0026] Therefore, the transfer of heat generated in the bus bar 3 to the arrangement member 5 can be promoted, and the cooling performance of the bus bar 3 can be improved.

[0027] Another example of the bus bar arrangement structure according to this embodiment will now be described with reference to Fig. 4. The bus bar arrangement structure 101 according to this embodiment includes a bus bar 3, a holding member 7, and a pressing member 9.

[0028] In the bus bar arrangement structure 101 according to this embodiment, the holding member 7 is arranged in a planar arrangement portion 103 of the arrangement member 5 and is fixed to the arrangement member 5 by fastening with fastening members 21. The outer surface of the holding member 7 that comes into contact with the arrangement portion 103 serves as a heat dissipation portion 19. Multiple (here, two) bus bars 3 are held by the holding member 7 so that their flat surfaces extending in the width and length directions come into contact mainly with the inner surface of the bottom of the holding member 7. The inner surface of the holding member 7 that comes into contact with the outer surface of the bus bar 3 serves as a heat transfer portion 15. The pressing member 9 is provided so that the blocking portion 23 and the pressing portion 25 can move together via an engagement portion 105.

[0029] Even in this bus bar arrangement structure 101, the bus bar 3 can be supported relative to the arrangement member 5 via the holding member 7, and the arrangement of the bus bar 3 relative to the arrangement member 5 can be stabilized. Furthermore, heat generated in the bus bar 3 can be efficiently released to the arrangement member 5 via the heat transfer portion 15 and the heat dissipation portion 19 of the holding member 7, improving the cooling performance of the bus bar 3. Note that, in the bus bar arrangement structure 101, heat transfer members 29 (see FIG. 1 ) may be disposed between the bus bar 3 and the heat transfer portion 15 and between the arrangement member 5 and the heat dissipation portion 19.

[0030] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

[0031] For example, although the bus bar arrangement structure according to the present embodiment includes two bus bars, the number of bus bars may be one, or three or more. In addition, although the bus bars are held in a state in which their length directions are arranged parallel to the holding member, the number of bus bars may be different from one another in the longitudinal direction relative to the holding member. [Explanation of symbols]

[0032] 1,101 Busbar arrangement structure 3 Bus Bar 5. Placement components 7 Retaining member 9 Pressing member 15 Heat transfer section 19 Heat dissipation part 21 Fastening members 29 Heat transfer materials

Claims

1. a bus bar disposed on the disposing member; a holding member that holds the bus bar and is fixed to the arrangement member; Equipped with The holding member has a heat transfer portion that contacts the bus bar and transfers heat from the bus bar, and a heat dissipation portion that contacts the placement member and dissipates the heat transferred to the heat transfer portion to the placement member.

2. the holding member is fixed to the positioning member by fastening a fastening member; The bus bar arrangement structure according to claim 1 , further comprising a pressing member disposed between the bus bar and the holding member, the pressing member pressing the bus bar toward the heat transfer portion by fastening the fastening member.

3. The bus bar arrangement structure according to claim 1 or 2, wherein heat transfer members for promoting heat transfer are arranged between the bus bar and the heat transfer portion and between the arrangement member and the heat dissipation portion.

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