Laminated busbar and method for manufacturing a laminated busbar

Abstract

To provide a laminated busbar and a method for manufacturing a laminated busbar, in which no reduction in stress endurance occurs in each of the stacked busbars. [Solution] The laminated busbar 10 has busbars 11, 12, and 13, bolt insertion holes 11A, 12A, and 13A that connect each busbar 11, 12, and 13 along the thickness direction, filling holes 11B, 12B, and 13B that connect each busbar 11, 12, and 13 along the thickness direction, and a filling portion 141 made of resin material that fills the filling holes 11B, 12B, and 13B.

Description

Technical Field

[0001] The present invention relates to a laminated busbar in which a plurality of busbars are laminated, and a method for manufacturing a laminated busbar.

Background Art

[0002] Conventionally, laminated busbars for connecting to batteries mounted on vehicles have been widely known (see, for example, Patent Document 1). In the laminated busbar disclosed in Patent Document 1, a plurality of strip-shaped busbars are laminated along the thickness direction. The laminated busbars are fixed to each other by, for example, heat welding or the like. A bolt insertion hole for connecting to a battery is formed in the busbar.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] Incidentally, in conventional laminated busbars, when heat welding is performed to fix the respective busbars to each other, the busbars are annealed by the heat welding. As a result, there is a concern that the stress durability of the busbars may decrease. Further, when annealed, when fastening bolts and nuts into the bolt insertion holes provided in the busbars, the heads of the nuts or bolts may sink into the respective busbars, which may cause cracks in the busbars or loosening of the bolts and nuts. Furthermore, in conventional laminated busbars, due to the reduced stress durability of each busbar, there is a possibility that breakage or detachment may occur in each busbar due to stress load caused by the usage environment during or after assembly.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a laminated busbar in which reduction in stress durability does not occur in the mutually laminated busbars, and a method for manufacturing the laminated busbar. [Means for solving the problem]

[0006] To achieve the aforementioned objectives, the laminated busbar according to the present invention has the following features. A laminated busbar in which multiple busbars formed in a strip shape are stacked along the thickness direction, Each of the aforementioned busbars is connected along the thickness direction by a bolt insertion hole, Each of the aforementioned busbars has a filling hole connecting them along the thickness direction, A resin covering material is provided to cover multiple busbars together, The aforementioned covering material is filled into the filling hole. Laminated bass bar.

[0007] Furthermore, in order to achieve the aforementioned objectives, the method for manufacturing laminated busbars according to the present invention is characterized by the following: A method for manufacturing a laminated busbar in which a plurality of busbars formed in a strip shape are stacked along the thickness direction, A drilling step in which bolt insertion holes and filling holes are drilled at predetermined positions along the thickness direction of each busbar, The arrangement step involves arranging the busbars in a mold for a covering material that covers multiple busbars together, with each of the busbars stacked along the thickness direction such that each of the bolt insertion holes and each of the filling holes are in communication with each other, The process includes an injection step of injecting a resin material into the mold to form the coating material, In the above arrangement step, the filling hole is placed inside the mold. A method for manufacturing laminated busbars. [Effects of the Invention]

[0008] The laminated busbar and method for manufacturing the laminated busbar according to the present invention have the effect of preventing a decrease in stress resistance in each of the busbars that are laminated together.

[0009] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by referring to the attached drawings and reading through the embodiments for carrying out the invention described below (hereinafter referred to as "embodiments"). [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a plan view of a laminated busbar according to the first embodiment of the present invention. [Figure 2] Figure 2 is a cross-sectional view of a laminated busbar. [Figure 3] Figure 3 is a cross-sectional view showing a method for manufacturing a laminated busbar according to the first embodiment of the present invention. Figure 3(A) is a cross-sectional view showing a drilling process in which bolt insertion holes and filling holes are drilled at predetermined positions along the thickness direction of the busbar. Figure 3(B) is a cross-sectional view showing a lamination process in which each busbar is laminated along the thickness direction. [Figure 4] Figure 4 is a cross-sectional view showing a method for manufacturing laminated busbars according to the first embodiment of the present invention. Figure 4(A) is a cross-sectional view showing the arrangement step in which each busbar is placed in the mold, and Figure 4(B) is a cross-sectional view showing the injection step in which resin material is injected into the mold. [Figure 5] Figure 5 is a cross-sectional view of a laminated busbar according to a second embodiment of the present invention. [Figure 6] Figure 6 is a cross-sectional view of a laminated busbar according to a third embodiment of the present invention. [Figure 7] Figure 7 is a plan view of a laminated busbar according to the fourth embodiment of the present invention. [Figure 8] Figure 8 is a cross-sectional view of the laminated busbar according to the fourth embodiment. [Figure 9] Figure 9 is a plan view of a laminated busbar according to the fifth embodiment of the present invention. [Figure 10] Figure 10 is a cross-sectional view of a laminated busbar according to the fifth embodiment. [Figure 11] Figure 11 is a plan view of a laminated busbar according to the sixth embodiment of the present invention. [Figure 12] Figure 12 is a cross-sectional view of a laminated busbar according to the sixth embodiment. [Figure 13] Figs. 13(A) to 13(D) are cross-sectional views of laminated busbars showing modified examples according to the present invention. MODE FOR CARRYING OUT THE INVENTION

[0011] Hereinafter, a laminated busbar and a method for manufacturing the laminated busbar according to each embodiment of the present invention will be described with reference to the drawings.

[0012] <First Embodiment> As shown in Figs. 1 and 2, a laminated busbar 10 includes strip-shaped busbars 11, 12, and 13, and the busbars 11, 12, and 13 are laminated along the thickness direction. Each of the busbars 11, 12, and 13 includes bolt insertion holes 11A, 12A, and 13A respectively drilled along the thickness direction, filling holes 11B, 12B, and 13B drilled along the thickness direction, and a resin coating material 14 that collectively covers the laminated busbar 10.

[0013] The bolt insertion holes 11A, 12A, and 13A have the same opening shape and the same dimensions as each other. The bolt insertion holes 11A, 12A, and 13A are provided on both sides in the longitudinal direction of the busbars 11, 12, and 13. The bolt insertion holes 11A, 12A, and 13A are arranged so as to communicate with each other when the busbars 11, 12, and 13 are laminated.

[0014] The filling holes 11B, 12B, and 13B have the same opening shape and the same dimensions as each other. The filling holes 11B, 12B, and 13B are provided at the center in the longitudinal direction of the busbars 11, 12, and 13. The filling holes 11B, 12B, and 13B are arranged so as to communicate with each other when the busbars 11, 12, and 13 are laminated.

[0015] The coating material 14 has a filling portion 141 formed by filling a resin material into the filling holes 11B, 12B, and 13B, and a coating portion 142 that is continuous with the filling portion 141 and partially covers the surface of the laminated busbar 10.

[0016] The filling portion 141 adheres tightly to the inner surfaces of the filling holes 11B, 12B, and 13B. This prevents the busbars 11, 12, and 13 from separating from each other. The covering portion 142 is made of the same material as the filling portion 141. The covering portion 142 has a roughly rectangular tubular shape that continuously covers the surfaces 11C, 13C and the end faces of the busbars 11, 12, and 13. The covering portion 142 adheres tightly to the surfaces 11C, 13C and the widthwise end faces of the busbars 11, 12, and 13. This prevents the busbars 11, 12, and 13 from separating from each other.

[0017] In the laminated busbar 10 of the first embodiment, busbars 11 and 13 are end busbars located at the ends in the thickness direction. Busbar 12 is a central busbar sandwiched between busbars (end busbars) 11 and 13. The surfaces 11C and 13C of busbars (end busbars) 11 and 13 that face away from busbar (central busbar) 12 are covered by the covering portion 142 (see Figure 2).

[0018] Figures 3 and 4 show a method for manufacturing the laminated busbar 10 of the first embodiment. As shown in Figure 3(A), a drilling step is performed in which bolt insertion holes 11A, 12A, 13A and filling holes 11B, 12B, 13B are drilled at predetermined positions along the thickness direction of each busbar 11, 12, 13. Then, as shown in Figure 3(B), a lamination step is performed in which each busbar 11, 12, 13 is laminated along the thickness direction such that each bolt insertion hole 11A, 12A, 13A communicates with each other and each filling hole 11B, 12B, 13B communicates with each other.

[0019] Next, as shown in Figure 4(A), the busbars 11, 12, and 13, which have been laminated by the lamination process, are placed in a pair of molds 16 and 17. At this time, the filling holes 11B, 12B, and 13B are placed in the pair of molds 16 and 17. After that, an injection process is performed in which resin material is injected into each mold 16 and 17. Through this injection process, the resin material is filled around the busbars 11, 12, and 13 and into the filling holes 11B, 12B, and 13B, forming the filling portion 141 and the covering portion 142. After the filling portion 141 and the covering portion 142 have solidified, the molds 16 and 17 are demolded to obtain the laminated busbar 10. With such a laminated busbar 10, connecting bolts 18 erected from the battery are inserted into the respective bolt insertion holes 11A, 12A, and 13A, and then connecting nuts 19 are screwed onto the connecting bolts 18 (see Figure 2).

[0020] <Effects of the First Embodiment> As described above, according to the laminated busbar 10 of the first embodiment of the present invention, the surfaces 11C, 13C and end faces of the busbars 11, 12, and 13 are covered by the covering portion 142. That is, the busbars 11, 12, and 13 are collectively covered by the covering portion 142 of the covering material 14. Furthermore, the covering material 14 has a filling portion 141 formed by filling the filling holes 11B, 12B, and 13B with molten resin material. Therefore, the busbars 11, 12, and 13 do not separate from each other. Moreover, according to the laminated busbar 10 of the first embodiment of the present invention, there is no need to perform heat welding to fix the busbars 11, 12, and 13 to each other. Therefore, problems such as the nuts 19 sinking in due to heat being applied to the busbars 11, 12, and 13, cracks forming in each busbar 11, 12, and 13, loosening of the connecting bolts 18 and nuts 19, and breakage or detachment of each busbar 11, 12, and 13 due to stress loads during assembly or in the usage environment after assembly do not occur.

[0021] Furthermore, according to the manufacturing method of the laminated busbar according to the first embodiment of the present invention, since the laminated busbar 10 is manufactured through the aforementioned drilling process, lamination process, placement process, and injection process, there is no process of excessive heat treatment in the manufacturing process, and a laminated busbar 10 can be manufactured without the problems of the conventional method.

[0022] <Second Embodiment> Figure 5 shows a laminated busbar 20 according to a second embodiment of the present invention. In the second embodiment described below, members, parts, names, etc. that have already been described in the first embodiment will be simplified or omitted by using reference numerals corresponding to those used in the first embodiment. The laminated busbar 20 has two filling holes 21B, 22B, and 23B each at the longitudinal center of the busbars 21, 22, and 23. The laminated busbar 20 also has two covering materials 24. The covering material 24 has a filling portion 241 and a covering portion 242, similar to the first embodiment.

[0023] In the laminated busbar 20 of the second embodiment, busbars 21 and 23 are end busbars located at the ends in the thickness direction. Busbar 22 is a central busbar sandwiched between busbars (end busbars) 21 and 23. On busbars (end busbars) 21 and 23, the surfaces 21C and 23C facing away from busbar (central busbar) 22 are covered by the covering portion 242. On busbars 21, 22 and 23, both end faces in the width direction are covered by the covering portion 242.

[0024] <Effects of the second embodiment> According to the laminated busbar 20 of the second embodiment of the present invention, similar to the laminated busbar 10 of the first embodiment described above, the busbars 21, 22, and 23 are not separated from each other by the covering material 24, and the conventional problems caused by heat welding do not occur. Furthermore, according to the laminated busbar 20 of the second embodiment of the present invention, since the covering material 24 is provided in two places, the mutual fixing of the busbars 21, 22, and 23 can be made even stronger compared to the laminated busbar 10.

[0025] <Third Embodiment> Figure 6 shows a laminated busbar 30 according to the third embodiment of the present invention. In the third embodiment described below, members, parts, names, etc. that have already been described in the first and second embodiments will be simplified or omitted by using reference numerals corresponding to those used in the first and second embodiments.

[0026] The laminated busbar 30 has filling holes 31B, 32B, and 33B located at the longitudinal center of the busbars 31, 32, and 33. The inner diameter dimension φ1 of the filling holes 31B and 33B is smaller than the inner diameter dimension φ2 of the filling hole 32B, and the filling holes 31B, 32B, and 33B are coaxially arranged. Therefore, the filling section 341 has a large diameter section 34A in the axial center, with small diameter sections 34B and 34B on either side of the large diameter section 34A.

[0027] In the laminated busbar 30 of the third embodiment, busbars 31 and 33 are end busbars located at the ends in the thickness direction. Busbar 32 is a central busbar sandwiched between busbars (end busbars) 31 and 33. On busbars (end busbars) 31 and 33, the surfaces 31C and 33C facing away from busbar (central busbar) 32 are covered by the covering portion 342. On busbars 31, 32, and 33, both end faces in the width direction are covered by the covering portion 342.

[0028] <Effects of the Third Embodiment> According to the laminated busbar 30 of the third embodiment of the present invention, similar to the laminated busbars 10 and 20 of the first and second embodiments described above, the busbars 31, 32, and 33 are not separated from each other by the covering material 34, and the conventional problems caused by heat welding do not occur. Furthermore, according to the laminated busbar 30 of the third embodiment of the present invention, the covering material 34 is provided with a large diameter portion 34A and small diameter portions 34B, 34B. For this reason, the mutual fixing of the busbars 31, 32, and 33 can be made even stronger compared to the laminated busbar 10 of the first embodiment and the laminated busbar 20 of the second embodiment.

[0029] <Fourth Embodiment> Figures 7 and 8 show a laminated busbar 40 according to the fourth embodiment of the present invention. In the fourth embodiment described below, the members, parts, names, etc. that have already been described in the first to third embodiments will be simplified or omitted by using reference numerals corresponding to those used in the first to third embodiments. The laminated busbar 40 has a plurality of recesses 442A on both surfaces in the thickness direction of the covering portion 442. These recesses 442A are continuous along the width direction (up and down direction in Figure 7) of the busbars 41, 42, and 43, and are arranged in parallel at predetermined intervals along the longitudinal direction (left and right direction in Figure 7) of the busbars 41, 42, and 43. In the laminated busbar 40 of the fourth embodiment, busbars 41 and 43 are end busbars located at the ends in the thickness direction. Busbar 42 is a central busbar sandwiched between busbars (end busbars) 41 and 43. Furthermore, in the busbars (end busbars) 41 and 43, the surfaces 41C and 43C facing away from the busbar (center busbar) 42 are covered by the covering portion 442. In the busbars 41, 42, and 43, both ends in the width direction are covered by the covering portion 442.

[0030] <Effects of the 4th Embodiment> According to the laminated busbar 40 of the fourth embodiment of the present invention, similar to the laminated busbars 10 and 20 of the first and second embodiments described above, the busbars 41, 42, and 43 are not separated from each other by the covering material 44, and the conventional problems caused by heat welding do not occur. Furthermore, according to the laminated busbar 40 of the fourth embodiment of the present invention, a recess 442A is provided on the surface of the covering portion 442, so that the covering portion 442 has flexibility. Accordingly, according to the laminated busbar 40 of the fourth embodiment of the present invention, even if the busbars 41, 42, and 43 are bent or curved, for example, when there is a difference in height or angle on the seating surfaces of a pair of connecting bolts 18 (see Figure 2) inserted through the left and right bolt insertion holes 41A, 42A, and 43A (left and right in Figure 8), the covering material 44 deforms and follows, and the mutual fixing of the busbars 41, 42, and 43 can be maintained.

[0031] Furthermore, according to the laminated busbar 40 of the fourth embodiment of the present invention, since the multiple recesses 442A are arranged in parallel, it can flexibly follow the curvature or bending of the busbars 41, 42, and 43.

[0032] <Fifth Embodiment> Figures 9 and 10 show a laminated busbar 50 according to the fifth embodiment of the present invention. In the fifth embodiment described below, members, parts, names, etc. that have already been described in the first to fourth embodiments will be simplified or omitted by using reference numerals corresponding to those used in the first to fourth embodiments. The laminated busbar 50 has three filling holes 51B, 52B, and 53B each at the longitudinal center of the busbars 51, 52, and 53. The laminated busbar 50 also has three covering materials 54. The covering portion 542 is formed so that its dimensions along the longitudinal direction of the busbars 51, 52, and 53 are approximately equal to the diameter of the filling portion 541. These covering portions 542 form recesses 542A between them, with surfaces 51C and 53C exposed. These recesses 542A are arranged parallel to each other along the longitudinal direction of the busbars 51, 52, and 53.

[0033] In the laminated busbar 50 of the fifth embodiment, busbars 51 and 53 are end busbars located at the ends in the thickness direction. Busbar 52 is a central busbar sandwiched between busbars (end busbars) 51 and 53. The surfaces 51C and 53C of busbars (end busbars) 51 and 53 that face away from busbar (central busbar) 52 are covered by the covering portion 542.

[0034] <Effects of the Fifth Embodiment> According to the laminated busbar 50 of the fifth embodiment of the present invention, similar to the laminated busbar 40 of the fourth embodiment described above, the busbars 51, 52, and 53 are not separated from each other by the covering material 54, and the conventional problems caused by heat welding do not occur. Furthermore, according to the laminated busbar 50 of the fifth embodiment of the present invention, since a recess 542A is provided, similar to the laminated busbar 40 of the fourth embodiment, the mutual fixation of the busbars 51, 52, and 53 can be maintained without hindering the curvature or bending of the busbars 51, 52, and 53.

[0035] Furthermore, according to the laminated busbar 50 of the fifth embodiment of the present invention, since a plurality of recesses 542A are arranged in parallel, it can flexibly follow the curvature or bending of the busbars 51, 52, and 53.

[0036] <Sixth Embodiment> Figures 11 and 12 show a laminated busbar 60 according to the sixth embodiment of the present invention. In the sixth embodiment described below, the members, parts, names, etc. that have already been described in the first to fifth embodiments will be simplified or omitted by using the same reference numerals as those used in the first to fifth embodiments. In the laminated busbar 60 of the sixth embodiment, busbars 61 and 63 are end busbars located at the ends in the thickness direction. Busbar 62 is a central busbar sandwiched between busbars (end busbars) 61 and 63.

[0037] In the busbars (end busbars) 61 and 63, the surfaces 61C and 63C facing away from the busbar (center busbar) 62 are covered by the covering portion 642. The laminated busbar 60 has a conductive layer 66 provided on both surfaces (upper and lower surfaces) in the thickness direction of the covering portion 642. The conductive layer 66 is made of, for example, nickel (Ni) or tin (Sn). The conductive layer 66 covers the surface of the covering portion 642 by an appropriate method such as sputtering or partial plating.

[0038] <Effects of the 6th Embodiment> According to the laminated busbar 60 of the sixth embodiment of the present invention, similar to the laminated busbar 10 of the first embodiment described above, the busbars 61, 62, and 63 are not separated from each other by the covering material 64, and the conventional problems caused by heat welding do not occur. Furthermore, according to the laminated busbar 60 of the sixth embodiment of the present invention, by providing conductive layers 66 on the upper and lower surfaces of the covering portion 642, good shielding performance can be obtained, and the generation of noise that adversely affects peripheral equipment can be suppressed.

[0039] <Other forms> It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the embodiments described above, and can be modified, improved, etc. as appropriate. Furthermore, the material, shape, dimensions, number, placement, etc. of each component in the embodiments described above are arbitrary and not limited as long as they can achieve the present invention.

[0040] For example, the laminated busbars 70, 80, 90, and 100 shown in Figures 13(A) to 13(D) are also included in the present invention. Hereinafter, in the laminated busbars 70, 80, 90, and 100 shown in Figures 13(A) to 13(D), the members, parts, names, etc. that have already been described in the first to sixth embodiments will be simplified or omitted by assigning reference numerals corresponding to those used in the first to sixth embodiments.

[0041] In the laminated busbar 70 shown in Figure 13(A), the filling holes 71B and 72B are tapered holes with a larger diameter on the surface 71C and 72C sides. As a result, the covering material 74 has a roughly spool-like shape with a smaller diameter in the axial center.

[0042] With this type of laminated busbar 70, similar to the laminated busbar 10 according to the first embodiment described above, the busbars 71 and 72 do not separate from each other due to the covering material 74, and the conventional problems caused by heat welding do not occur.

[0043] In the laminated busbar 80 shown in Figure 13(B), the filling holes 81B and 82B are stepped holes with a larger diameter on the surface 81C and 82C sides. With such a laminated busbar 80, the same effect as the laminated busbar 70 shown in Figure 13(A) above can be obtained.

[0044] In the laminated busbar 90 shown in Figure 13(C), the filling holes 91B and 92B are provided in directions that intersect the thickness direction and longitudinal direction of the busbars 91 and 92, respectively. With such a laminated busbar 90, if bolts are inserted through the bolt insertion holes 91A and 92A, the direction in which the busbars 91 and 92 separate is restricted in the thickness direction, so that the busbars 91 and 92 can maintain mutual fixation against the force that tries to separate them along the thickness direction.

[0045] The laminated busbar 100 shown in Figure 13(D) has the same inner diameter for the filling holes 101B and 102B, and the axes of the filling holes 101B and 102B are offset. With such a laminated busbar 100, the busbars 101 and 102 can maintain mutual fixation against forces that would cause them to separate from each other.

[0046] Herein, the features of the embodiments of the laminated busbar and the method for manufacturing the laminated busbar according to the present invention described above are briefly summarized and listed below in [1] to [6].

[0047] [1] A laminated busbar (10) in which multiple busbars (11, 12, 13) formed in a strip shape are stacked along the thickness direction, Each of the aforementioned busbars (11, 12, 13) is connected along the thickness direction by bolt insertion holes (11A, 12A, 13A), The aforementioned busbars (11, 12, 13) are connected by filling holes (11B, 12B, 13B) along the thickness direction, The system includes a resin covering material (14) that covers multiple busbars (11, 12, 13) together, The covering material (14) is filled into the filling holes (11B, 12B, 13B). Laminated bass bar.

[0048] In the laminated busbar (10) with the configuration described in [1] above, the covering material (14) covers multiple busbars (11, 12, 13) together and fills the filling holes (11B, 12B, 13B). Therefore, the busbars (11, 12, 13) do not separate from each other. Furthermore, with the laminated busbar (10), there is no need to perform heat welding to fix the busbars (11, 12, 13) to each other, so problems such as the nuts (19) sinking in due to heat being applied to the busbars (11, 12, 13), cracks occurring in each busbar (11, 12, 13), loosening of the connecting bolts (18) and nuts (19), and destruction or detachment of each busbar (11, 12, 13) due to stress loads during assembly or in the usage environment after assembly do not occur.

[0049] [2] In the laminated busbar (30) described in [1], A pair of end busbars (31, 33) are positioned at both ends in the thickness direction, A central busbar (32) sandwiched between a pair of end busbars (31, 33), The inner diameter dimensions of the filling holes (31B, 33B) in each of the end busbars (31, 33) are, Smaller than the inner diameter dimension of the filling hole (32B) in the central busbar (32), Laminated busbar (30).

[0050] According to the laminated busbar (30) described in [2] above, the difference in the inner diameter dimensions of each filling hole (31B, 32B, 33B) provides the covering material (34) with a large diameter section (34A) and a small diameter section (34B, 34B), thereby further strengthening the mutual fixing of the busbars (31, 32, 33).

[0051] [3] In the laminated busbar (40) described in [2] above, Recesses (442A) are provided on both surfaces in the thickness direction of the covering material (44) along the width direction of the busbars (41, 43). Laminated busbar (40).

[0052] According to the laminated busbar (40) described in [3] above, the recess (442A) provides flexibility to the covering material (44), so that even if the busbars (41, 42, 43) are bent or curved, the covering material (44) can deform and follow.

[0053] [4] In the laminated busbar (40) described in [3] above, The aforementioned recess (442A) has a plurality of parts, Each of the aforementioned recesses (442A) is arranged parallel to the longitudinal direction of the busbars (end busbars) (41, 43), Laminated busbar (40).

[0054] According to the laminated busbar (10) described in [4] above, since multiple recesses (442A) are arranged in parallel, it can flexibly follow the curvature or bending of the busbars (41, 42, 43).

[0055] [5] In the laminated busbar (60) described in [4] above, A conductive layer (66) is provided on the surface of the coating material (64). Laminated busbar (60).

[0056] According to the laminated busbar (60) described in [5] above, good shielding can be obtained by the conductive layer (66), and the generation of noise that adversely affects peripheral equipment can be suppressed.

[0057] [6] A method for manufacturing a laminated busbar (10) in which a plurality of busbars formed in a strip shape are stacked along the thickness direction, A drilling step in which bolt insertion holes (11A, 12A, 13A) and filling holes (11B, 12B, 13B) are drilled at predetermined positions along the thickness direction of each of the busbars (11, 12, 13), The arrangement step involves arranging the busbars (11, 12, 13) in a state where each of the bolt insertion holes (11A, 12A, 13A) is in communication with each other, and each of the filling holes (11B, 12B, 13B) is in communication with each other, and then placing the busbars (11, 12, 13) in a stacked state along the thickness direction, and then placing the covering material (14) that covers the multiple busbars (11, 12, 13) together in a mold (16, 17), The process includes an injection step of injecting a resin material into the molds (16, 17) to form the coating material (14), In the aforementioned arrangement step, the filling holes (11B, 12B, 13B) are placed inside the molds (16, 17). A method for manufacturing a laminated busbar (10).

[0058] According to the manufacturing method of the laminated busbar (10) described in [6] above, the laminated busbar (10) is manufactured through a drilling process, a placement process, and an injection process. Therefore, there is no process of excessive heat treatment in the manufacturing process, and a laminated busbar (10) can be manufactured without the problems of the conventional method. [Explanation of Symbols]

[0059] 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 stacked busbars 11, 12, 13, 21, 22, 23, 31, 32, 33, 41, 42, 43, 51, 52, 53, 61, 62, 63, 71, 72, 81, 82, 91, 92, 101, 102 Busba 11A, 12A, 13A, 21A, 22A, 23A, 31A, 32A, 33A, 41A, 42A, 43A, 51A, 52A, 53A, 61A, 62A, 63A, 71A, 72A, 81A, 82A, 91A, 92A, 101A, 102A Bolt insertion holes 11B, 12B, 13B, 21B, 22B, 23B, 31B, 32B, 33B, 41B, 42B, 43B, 51B, 52B, 53B, 61B, 62B, 63B, 71B, 72B, 81B, 82B, 91B, 92B, 101B, 102B Filling hole 11C, 13C, 21C, 23C, 31C, 33C, 41C, 43C, 51C, 53C, 61C, 63C, 71C, 72C, 81C, 82C, 91C, 92C, 101C, 102C Surface 14, 24, 34, 54, 64, 74, 84, 94, 104 Covering material 442A, 542A recess 66 Conductive layer

Claims

1. A laminated busbar in which multiple busbars formed in a strip shape are stacked along the thickness direction, Each of the aforementioned busbars is connected along the thickness direction by a bolt insertion hole, Each of the aforementioned busbars has a filling hole connecting them along the thickness direction, A resin covering material is provided to cover multiple busbars together, The aforementioned covering material is filled into the filling hole. Laminated bass bar.

2. In the laminated busbar according to claim 1, A pair of end busbars are positioned at both ends in the thickness direction, A central busbar sandwiched between a pair of end busbars, The inner diameter of each filling hole in each of the end busbars is, Smaller than the inner diameter of the filling hole in the central busbar, Laminated bass bar.

3. In the laminated busbar according to claim 2, Recesses are provided on both surfaces of the covering material in the thickness direction, along the width direction of the busbar. Laminated bass bar.

4. In the laminated busbar according to claim 3, Having a plurality of the aforementioned recesses, Each of the aforementioned recesses is arranged parallel to the longitudinal direction of the end busbar. Laminated bass bar.

5. In the laminated busbar according to claim 1, A conductive layer is provided on the surface of the coating material. Laminated bass bar.

6. A method for manufacturing a laminated busbar in which a plurality of busbars formed in a strip shape are stacked along the thickness direction, A drilling step in which bolt insertion holes and filling holes are drilled at predetermined positions along the thickness direction of each busbar, The arrangement step involves arranging the busbars in a mold for a covering material that covers multiple busbars, with each of the busbars stacked along the thickness direction such that each of the bolt insertion holes and each of the filling holes are in communication with each other, The process includes an injection step of injecting a resin material into the mold to form the coating material, In the above arrangement step, the filling hole is placed inside the mold. A method for manufacturing laminated busbars.

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