JP6575869B2 - Film capacitor - Google Patents

Description

  The present invention relates to a film capacitor.

  Metallicon electrodes (end surface electrodes) are formed on both end faces of a capacitor element formed by laminating or winding a metallized film, bus bars are connected to the respective metallicon electrodes, and a part of the two bus bars is sandwiched between insulating papers. Patent Document 1 discloses a case mold type capacitor in which ESL (equivalent DC inductance), which is an inductance component of a bus bar, is reduced. This case mold type capacitor has a configuration in which insulating paper (insulating sheet) is wound around one bus bar.

  When insulating paper is used for the insulating member sandwiched between two bus bars, the thickness of the insulating member can be reduced compared to the case where an insulating plate formed by resin molding is used for the insulating member. Can be shortened, and ESL can be effectively reduced.

JP 2008-288242 A

  In the case mold type capacitor of Patent Document 1, the insulating paper is fixed to one bus bar by being wound, but is not fixed to the other bus bar. For this reason, when an impact or the like is received from the outside, there is a possibility that a displacement occurs between the other bus bar and the insulating paper.

  In view of such a problem, an object of the present invention is to provide a film capacitor in which positional displacement between the three members of the insulating sheet and the bus bars on both sides of the insulating sheet hardly occurs.

  The film capacitor according to the main aspect of the present invention includes a capacitor element, a first bus bar and a second bus bar connected to the capacitor element, and the first bus bar and the second bus bar, respectively. And a first overlapping portion and a second overlapping portion that overlap each other, and an insulating portion for insulating between the first overlapping portion and the second overlapping portion. Here, the insulating portion includes an insulating sheet, a first holding body fixed to a first end portion among four end portions of the insulating sheet, and a second end opposite to the first end portion. A second holding body fixed to the end of the second holding body. In the first holding body and the second holding body, the first overlapping portion is in close proximity to one surface of the insulating sheet, and the second overlapping portion is in close proximity to the other surface of the insulating sheet. Thus, the first bus bar and the second bus bar are held.

  According to the present invention, it is possible to provide a film capacitor in which positional displacement between the three members of the insulating sheet and the bus bars on both sides of the insulating sheet hardly occurs.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the embodiment described below is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

FIG. 1A is a front perspective view of a film capacitor according to the embodiment, and FIG. 1B is a film showing a state before the capacitor unit is accommodated in the case according to the embodiment. It is a disassembled perspective view of a capacitor | condenser. FIG. 2A is an exploded perspective view of the capacitor unit showing a state before the bus bar unit is connected to two capacitor elements according to the embodiment. FIG.2 (b) is front sectional drawing of the bus-bar unit cut | disconnected in the position of the frontmost part of the insertion slot of the front side based on Embodiment, FIG.2 (c) is the rear side based on Embodiment It is a back surface sectional view of the bus-bar unit cut | disconnected in the position of the last part of the insertion groove | channel. FIG. 3A is a front perspective view of the front bus bar according to the embodiment, and FIG. 3B is a front perspective view of the rear bus bar according to the embodiment. Fig.4 (a) is a front perspective view of the insulation module based on Embodiment, FIG.4 (b) is AA 'sectional drawing of Fig.4 (a). FIG. 4C is a rear perspective view of the insulating module according to the embodiment, and FIG. 4D is a cross-sectional view taken along the line BB ′ of FIG. Drawing 5 is a figure for explaining the procedure which manufactures an insulation module by insert molding concerning an embodiment. FIG. 6A is a front perspective view of the bus bar unit according to the first modification, and FIG. 6B is a plan view of the main part of the bus bar unit according to the first modification. FIG. 7A is a front perspective view of the front bus bar according to the first modification, and FIG. 7B is a front perspective view of the rear bus bar according to the first modification. FIG. 8A is a front perspective view of an insulating module according to Modification Example 1, and FIG. 8B is a cross-sectional view taken along line AA ′ of FIG. FIG. 8C is a rear perspective view of the insulating module according to the first modification, and FIG. 8D is a cross-sectional view taken along the line BB ′ of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. For convenience, front and rear, left and right, and up and down directions are appropriately appended to each drawing. In addition, the direction of illustration shows the relative direction of the film capacitor 1 to the last, and does not show an absolute direction.

  FIG. 1A is a front perspective view of the film capacitor 1, and FIG. 1B is an exploded perspective view of the film capacitor 1 showing a state before the capacitor unit 2 is accommodated in the case 3. In FIG. 1A, for the sake of convenience, part of the filling resin 4 is drawn with diagonal lines, and the remaining part is drawn transparently.

  As shown in FIGS. 1A and 1B, the film capacitor 1 includes a capacitor unit 2, a case 3, and a filling resin 4.

  The capacitor unit 2 includes two capacitor elements 10 and a bus bar unit 20 for extracting electricity from these capacitor elements 10 and supplying the same to an external device. The case 3 has a substantially rectangular parallelepiped shape that is flat up and down, and an upper surface is opened. Case 3 is formed of a resin such as polyphenylene sulfide (PPS), for example, and accommodates capacitor unit 2. The filling resin 4 is formed by filling the case 3 with a molten resin and cooling it. The filling resin 4 covers a part of the two capacitor elements 10 and the bus bar unit 20 in the capacitor unit 2 and protects them from moisture and impact.

  The configuration of the capacitor unit 2 will be described in detail below.

  FIG. 2A is an exploded perspective view of the capacitor unit 2 showing a state before the bus bar unit 20 is connected to the two capacitor elements 10. FIG. 2B is a front sectional view of the bus bar unit 20 cut at the foremost position of the front insertion grooves 323, 325, 333, and 335, and FIG. 2C is a rear insertion groove. 3 is a rear sectional view of the bus bar unit 20 cut at positions of the last part of 324, 326, 334, and 336. FIG. FIG. 3A is a front perspective view of the front bus bar 100, and FIG. 3B is a front perspective view of the rear bus bar 200. 4A is a front perspective view of the insulating module 300, and FIG. 4B is a cross-sectional view taken along the line AA ′ of FIG. 4A. 4C is a rear perspective view of the insulating module 300, and FIG. 4D is a cross-sectional view taken along the line BB ′ of FIG. 4C.

  Capacitor element 10 is formed by stacking two metallized films on which aluminum is vapor-deposited on a dielectric film, winding or stacking the stacked metallized films, and pressing the peripheral surface into a flat shape. . End face electrodes 11 and 12 are formed on both end faces of the capacitor element 10. The two capacitor elements 10 are arranged in the left-right direction so that both end surfaces face the front-rear direction. The capacitor element 10 of the present embodiment is formed of a metallized film in which aluminum is vapor-deposited on a dielectric film, but in addition to this, metallization in which other metals such as zinc and magnesium are vapor-deposited. It may be formed by a film. Or the capacitor | condenser element 10 may be formed with the metallized film which vapor-deposited several metals among these metals, and may be formed with the metallized film vapor-deposited the alloy of these metals. .

  The bus bar unit 20 includes a front bus bar 100, a rear bus bar 200, and an insulation module 300. The front bus bar 100 and the rear bus bar 200 are connected to the front end electrode 11 and the rear end electrode 12 of each capacitor element 10, respectively, and draw electricity from each capacitor element 10. The insulation module 300 insulates the third plate portion 130 of the rear bus bar 200 and the third plate portion 230 of the rear bus bar 200 that overlap in the front-rear direction.

  As shown in FIG. 3A, the front bus bar 100 is formed of a conductive material, for example, a copper plate, and includes a first plate portion 110, a second plate portion 120, a third plate portion 130, and seven connections. Terminal portion 140. The front bus bar 100 is formed by, for example, appropriately cutting and bending a single copper plate, and the first plate portion 110, the second plate portion 120, the third plate portion 130, and the seven connection terminal portions 140 are provided. It is united.

  The first plate part 110 is formed to rise upward, and has a rectangular shape that is elongated to the left and right. The second plate part 120 has an elongated rectangular shape on the left and right, and extends rearward from the upper end part of the first plate part 110.

  The third plate portion 130 has a long rectangular shape on the left and right, and extends upward from the rear end portion of the second plate portion 120. A rectangular first lower insertion portion 131 that protrudes to the left is formed at the left end of the third plate portion 130, and is located above the first lower insertion portion 131 and above the first lower insertion portion 131. A rectangular first upper insertion portion 132 that protrudes to the left is formed. Similarly, a rectangular second lower insertion portion 133 that protrudes to the right is formed at the right end of the third plate portion 130, and the second lower insertion portion is located above the second lower insertion portion 133. A rectangular second upper insertion portion 134 that protrudes to the right of 133 is formed.

  The seven connection terminal portions 140 are arranged at the upper end portion of the third plate portion 130 so as to have a predetermined interval in the left-right direction. Each connection terminal portion 140 has a vertically long and narrow rectangular shape, and is bent at a substantially right angle with respect to the third plate portion 130 at the lower end portion thereof, and both planes thereof face in the left-right direction. Each terminal (not shown) from an external device is connected to each connection terminal portion 140 using a fixing method such as soldering.

  As shown in FIG. 3 (b), the rear bus bar 200 is formed of a conductive material, for example, a copper plate, and includes a first plate portion 210, a second plate portion 220, a third plate portion 230, and seven connections. Terminal portion 240. The rear bus bar 200 is formed, for example, by appropriately cutting and bending a single copper plate, and the first plate portion 210, the second plate portion 220, the third plate portion 230, and the seven connection terminal portions 240 are formed. It is united.

  The first plate part 210 is formed so as to rise upward, and has an elongated rectangular shape on the left and right. The second plate part 220 has a slightly long rectangular shape on the left and right, and extends forward from the upper end of the first plate part 110.

  The third plate part 230 has a long rectangular shape on the left and right, and extends upward from the front end part of the second plate part 120. A rectangular third lower insertion portion 231 that protrudes to the left is formed on the left end of the third plate portion 230, and is located above the third lower insertion portion 231 and above the third lower insertion portion 231. A rectangular third upper insertion portion 232 that protrudes to the left is formed. Similarly, a rectangular fourth lower insertion portion 233 that protrudes to the right is formed at the right end of the third plate portion 230, and the fourth lower insertion portion is located above the fourth lower insertion portion 233. A rectangular fourth upper insertion portion 234 that protrudes to the right of 233 is formed.

  The seven connection terminal portions 240 are arranged at the upper end portion of the third plate portion 230 so as to have a predetermined interval in the left-right direction. Each connection terminal portion 240 has a vertically elongated rectangular shape, and is bent at a substantially right angle with respect to the third plate portion 230 at the lower end portion thereof, and both planes thereof face in the left-right direction. Each terminal (not shown) from an external device is connected to each connection terminal portion 240 using a fixing method such as soldering.

  The front bus bar 100 and the rear bus bar 200 have shapes that are symmetrical in the front-rear direction, except that the second plate part 220 of the rear bus bar 200 is longer than the second plate part 120 of the front bus bar 100 in the front-rear direction.

  As shown in FIGS. 4A to 4D, the insulating module 300 includes an insulating sheet 310, a left holding body 320, and a right holding body 330.

  The insulating sheet 310 is formed in a rectangular shape that is long to the left and right by a sheet (film) made of resin such as insulating paper or PPS, and has an insulating property. The thickness of the insulating sheet 310 is 1 mm or less, for example, about 0.2 mm.

  The left holding body 320 and the right holding body 330 are formed of a resin such as PPS and have insulating properties. The left holding body 320 and the right holding body 330 are fixed to the left end portion 310a and the right end portion 310b by sandwiching the left end portion 310a and the right end portion 310b of the insulating sheet 310, respectively, by insert molding. Is done.

  The left holding body 320 is formed with a step surface 320b which is one step lower than the upper surface 320a on the inner portion. A vertically long first lower groove portion 321 is formed between the step surface 320b and the inner side surface 320d following the step surface 320b, and the upper side is formed between the upper surface 320a and the inner side surface 320c. A first upper groove portion 322 that is long in the vertical direction and opens inward is formed. In the left holding body 320, the first lower groove portion 321 is partitioned forward and backward by the insulating sheet 310, so that the first lower insertion groove 323 that runs vertically along the front surface of the insulating sheet 310 is formed on both sides of the insulating sheet 310. A third lower insertion groove 324 that runs up and down along the rear surface of the insulating sheet 310 is formed. Similarly, in the left holding body 320, the first upper groove portion 322 is partitioned forward and backward by the insulating sheet 310, so that the first upper plug that runs up and down along the front surface of the insulating sheet 310 is formed on both sides of the insulating sheet 310. A groove 325 and a third upper insertion groove 326 running up and down along the rear surface of the insulating sheet 310 are formed.

  The right holding body 330 is formed with a step surface 330b that is one step lower than the upper surface 330a at the inner portion. A vertically long second lower groove portion 331 is formed between the step surface 330b and the inner side surface 330d that follows the step surface 330b, and the upper and lower inner bottom surfaces 331 are formed upward and downward. A second upper groove portion 332 that is long in the vertical direction and opens inward is formed. In the right holder 330, the second lower groove portion 331 is partitioned forward and backward by the insulating sheet 310, so that the second lower insertion groove 333 that runs up and down along the front surface of the insulating sheet 310 is formed on both sides of the insulating sheet 310. A fourth lower insertion groove 334 that runs up and down along the rear surface of the insulating sheet 310 is formed. Similarly, in the right holding body 330, the second upper groove portion 332 is partitioned forward and backward by the insulating sheet 310, so that the second upper insertion that runs up and down along the front surface of the insulating sheet 310 on both sides of the insulating sheet 310. A groove 335 and a fourth upper insertion groove 336 running up and down along the rear surface of the insulating sheet 310 are formed.

  As shown in FIG. 2B, the first lower insertion portion 131 and the first upper insertion portion 132 are respectively inserted into the first lower insertion groove 323 and the first upper insertion groove 325 from above. Then, the second lower insertion part 133 and the second upper insertion part 134 are respectively inserted into the second lower insertion groove 333 and the second upper insertion groove 335 from above. As a result, the front bus bar 100 is held by the left holding body 320 and the right holding body 330 so that the third plate portion 130 faces and opposes the front surface of the insulating sheet 310. Note that the third plate portion 130 may be in contact with the insulating sheet 310, and there may be a slight gap between the third plate portion 130 and the insulating sheet 310.

  Further, as shown in FIG. 2 (c), the third lower insertion portion 231 and the third upper insertion portion 232 are respectively connected to the third lower insertion groove 324 and the third upper insertion groove 326 from above. The fourth lower insertion portion 233 and the fourth upper insertion portion 234 are respectively inserted into the fourth lower insertion groove 334 and the fourth upper insertion groove 336 from above. As a result, the rear bus bar 200 is held by the left holding body 320 and the right holding body 330 so that the third plate portion 230 faces and opposes the rear surface of the insulating sheet 310. Note that the third plate portion 230 may be in contact with the insulating sheet 310, or there may be a slight gap between the third plate portion 230 and the insulating sheet 310.

  Thus, in the bus bar unit 20, the third plate portion 130 of the front bus bar 100 and the third plate portion 230 of the rear bus bar 200 overlap with each other with the insulating sheet 310 interposed therebetween. The insulating plate 310 insulates the third plate portion 130 of the front bus bar 100 from the third plate portion 230 of the rear bus bar 200. In the state where the front bus bar 100 and the rear bus bar 200 are mounted on the insulating module 300, the insulating sheet 310 is above the third plate portion 130 of the front bus bar 100 and the third plate portion 230 of the rear bus bar 200, that is, The front bus bar 100 and the rear bus bar 200 protrude in a direction in which they can be detached from the insulating module 300. For this reason, even if the front bus bar 100 and the rear bus bar 200 move slightly upward, the third plate portions 130 and 230 do not come out of the region of the insulating sheet 310.

  Two capacitor elements 10 are arranged between the front bus bar 100 and the rear bus bar 200. The first plate portion 110 of the front bus bar 100 is fixed to the front end electrode 11 of each capacitor element 10 by a fixing method such as soldering, and the first plate portion 210 of the rear bus bar 200 is fixed to the rear side of each capacitor element 10. The end face electrode 12 is fixed by a fixing method such as soldering.

  FIG. 5 is a diagram for explaining a procedure for manufacturing the insulating module 300 by insert molding.

  In the mold M for manufacturing the insulating module 300, the mold M1 for forming the left holding body 320 and the mold M2 for forming the right holding body 330 are arranged close to each other, and the left holding body 320 and the right The mold M1 is disposed on the right side and the mold M2 is disposed on the left side so that the holding body 330 faces the opposite side of the completion of the insulation module 300.

  First, as shown in the process diagram 1 of FIG. 5, the insulating sheet 310 is fed from the feeder R to the position of the mold M1 with the mold M being opened. Thereafter, as shown in FIG. 2, the mold M is closed and resin is injected into the mold M1, and the left holding body 320 into which the insulating sheet 310 is inserted is formed. Next, after the mold M is opened and the insulating sheet 310 is fed by a predetermined amount together with the left holding body 320 formed, the mold M is closed again as shown in FIG. Resin is injected into M2. Thereby, the right holding body 330 and the left holding body 320 into which the insulating sheet 310 is inserted are formed. Next, when the mold M is opened and the insulating sheet 310 is fed by a predetermined amount together with the formed right holding body 330 and left holding body 320, as shown in FIG. 330 and the left holding body 320 are formed. On the other hand, as shown in FIG. 5, the insulating sheet 310 is cut at a position between the fed right holder 330 and left holder 320. Thereby, the insulation module 300 is completed. Thereafter, the insulating modules 300 are manufactured one after another by repeating the operations of the process diagrams 3 to 5.

<Effect of Embodiment>
As described above, according to the present embodiment, the following effects are exhibited.

  The bus bar unit 20 is configured such that the third plate portion 130 of the front bus bar 100 and the third plate portion 230 of the rear bus bar 200 are overlapped with each other via the insulating sheet 310. The distance between the plate portions 220 can be reduced, and the ESL (equivalent DC inductance) of the front bus bar 100 and the rear bus bar 200 can be effectively reduced.

  Moreover, in the bus bar unit 20, the third plate portion 130 of the front bus bar 100 is close to the front surface of the insulating sheet 310 by the left holder 320 and the right holder 330 fixed to the left and right ends 310 a and 310 b of the insulating sheet 310. Since the front bus bar 100 and the rear bus bar 200 are held so that the third plate portion 230 of the rear bus bar 200 faces the rear surface of the insulating sheet 310, the insulating sheet 310 and the front bus bar 100 Misalignment between the three plates 130 and the third plate 230 of the rear bus bar 200 hardly occurs.

  Furthermore, the front bus bar 100 can be obtained simply by inserting the insertion portions 131, 132, 133, and 134 formed at the left and right ends of the third plate portion 130 into the corresponding insertion grooves 323, 325, 333, and 335, respectively. Can be easily held by the left holding body 320 and the right holding body 330. Similarly, the rear bus bar can be obtained simply by inserting the insertion portions 231, 232, 233, and 234 formed at the left and right ends of the third plate portion 230 into the corresponding insertion grooves 324, 326, 334, and 336. 200 can be easily held by the left holding body 320 and the right holding body 330.

  In particular, the front bus bar 100 has a first lower insertion part 131 and a second lower insertion part 133 formed on the lower side of the third plate part 130 on the lower side of the left holding body 320 and the right holding body 330. The first lower insertion groove 323 and the second lower insertion groove 333 are inserted into the first lower insertion portion 131 and the second lower insertion portion 133, and are extended outward from the first lower insertion portion 131 and the second lower insertion portion 133. The first upper insertion portion 132 and the second upper insertion portion 134 that are formed so as to be taken out are arranged above the left holding body 320 and the right holding body 330, and the first lower insertion groove 323 and the second lower insertion portion. The first upper insertion groove 325 and the second upper insertion groove 335 formed outside the groove 333 are configured to be inserted. Accordingly, the upper and lower sides of the third plate portion 130 can be held by the left holding body 320 and the right holding body 330 with a small insertion amount. This facilitates insertion of the insertion portions 131, 132, 133, 134 into the insertion grooves 323, 325, 333, 335, so that the front bus bar 100 can be more easily attached to the left holding body 320 and the right holding body 330. Can be retained. Similarly, the rear bus bar 200 can be easily inserted into the insertion grooves 324, 326, 334, and 336 of the insertion portions 231, 232, 233, and 234, so that the rear bus bar 200 is held by the left holding body 320 and the right holding body. The body 330 can be held more easily.

  Further, in the left holding body 320, the first lower groove portion 321 is partitioned forward and backward by the insulating sheet 310, whereby the first lower insertion groove 323 and the third lower insertion groove 324 are formed on both sides of the insulating sheet 310. Then, the first upper groove portion 322 is partitioned forward and backward by the insulating sheet 310, whereby the first upper insertion groove 325 and the third upper insertion groove 326 are formed on both sides of the insulating sheet 310. Further, in the right holder 330, the second lower groove 331 and the fourth lower insertion groove 334 are formed on both sides of the insulating sheet 310 by partitioning the second lower groove 331 back and forth with the insulating sheet 310. Then, the second upper groove portion 332 is partitioned forward and backward by the insulating sheet 310, whereby the second upper insertion groove 335 and the fourth upper insertion groove 336 are formed on both sides of the insulating sheet 310. Accordingly, the insertion grooves 323, 325, 333, and 335 can be formed in the immediate vicinity of the front surface of the insulating sheet 310, so that the insertion portions 131, 132, 133, and 134 are flush with the third plate portion 130. If formed, the third plate portion 130 can be brought into close proximity to the front surface of the insulating sheet 310. Therefore, it is not necessary to process the insertion parts 131, 132, 133, and 134 into a complicated shape such as projecting forward with respect to the third plate part 130, and the front bus bar 100 can be easily manufactured. Similarly, since the insertion grooves 324, 326, 334, and 336 can be formed in the immediate vicinity of the rear surface of the insulating sheet 310, the insertion portions 231, 232, 233, and 234 are made to be flush with the third plate portion 230. If formed, the third plate portion 230 can be brought into close proximity to the rear surface of the insulating sheet 310. Therefore, it is not necessary to process the insertion portions 231, 232, 233, and 234 in a complicated shape such as projecting backward with respect to the third plate portion 230, and the rear bus bar 200 can be easily manufactured.

  Further, the insulating module 300 includes a left holding body 320 and a right holding body 330 that are fixed only to the left and right end portions 310a and 310b among the four upper, lower, left and right ends of the insulating sheet 310. 5, the insulating module 300 is manufactured using the mold M in which the mold M1 for forming the left holding body 320 and the mold M2 for forming the right holding body 330 are arranged close to each other. It becomes possible. For this reason, the metal mold | die M can be made small and the manufacturing cost of the metal mold | die M etc. can be reduced.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and the application example of the present invention can be modified in various ways in addition to the above embodiment. Is possible.

<Modification 1>
FIG. 6A is a front perspective view of the bus bar unit 30 according to the first modification, and FIG. 6B is a plan view of the main part of the bus bar unit 30 according to the first modification. 7A is a front perspective view of the front bus bar 400 according to the first modification, and FIG. 7B is a front perspective view of the rear bus bar 500 according to the first modification. FIG. 8A is a front perspective view of the insulation module 600 according to the first modification, and FIG. 8B is a cross-sectional view taken along line AA ′ of FIG. FIG. 8C is a rear perspective view of the insulating module 600 according to the first modification, and FIG. 8D is a cross-sectional view taken along line BB ′ of FIG.

  The bus bar unit 20 of the above embodiment can be replaced with the bus bar unit 30 of the first modification. Hereinafter, the bus bar unit 30 will be described in detail.

  The bus bar unit 30 includes a front bus bar 400, a rear bus bar 500, and an insulation module 600.

  As shown in FIG. 7 (a), the front bus bar 400 is formed of a conductive material, for example, a copper plate, and includes a first plate portion 410, a second plate portion 420, a third plate portion 430, and seven connections. Terminal portion 440. The configurations of the first plate portion 410, the second plate portion 420, the third plate portion 430, and the connection terminal portion 440 are the same as the first plate portion 110, the second plate portion 120, and the third plate of the front bus bar 100 in the above embodiment. The same as the part 130 and the connection terminal part 140.

  A rectangular first lower insertion portion 431 that protrudes to the left is formed at the left end of the third plate portion 430. The first lower insertion portion 431 is located above the first lower insertion portion 431, above the first lower insertion portion 431. A rectangular first upper insertion portion 432 that protrudes to the left is formed. Similarly, a rectangular second lower insertion portion 433 that protrudes to the right is formed at the right end of the third plate portion 430, and the second lower insertion portion is located above the second lower insertion portion 433. A rectangular second upper insertion portion 434 that protrudes to the right of 433 is formed. The first lower insertion portion 431, the first upper insertion portion 432, the second lower insertion portion 433, and the second upper insertion portion 434 have their root portions so as to protrude forward from the third plate portion 430. Is folded forward. As a result, the third plate portion 430 projects rearward from the first lower insertion portion 431, the first upper insertion portion 432, the second lower insertion portion 433, and the second upper insertion portion 434. .

  As shown in FIG. 7 (b), the rear bus bar 500 is formed of a conductive material, for example, a copper plate, and has seven connections including a first plate portion 510, a second plate portion 520, and a third plate portion 530. Terminal portion 540. The configurations of the first plate portion 510, the second plate portion 520, the third plate portion 530, and the connection terminal portion 540 are the same as the first plate portion 210, the second plate portion 220, and the third plate of the rear bus bar 200 in the above embodiment. This is the same as the section 230 and the connection terminal section 240. A third lower insertion portion 531 and a third upper insertion portion 532 are formed at the left end portion of the third plate portion 130, and a fourth lower insertion portion 533 and a fourth upper insertion portion 534 are formed at the right end portion. Is formed. The configuration of the third lower insertion portion 531, the third upper insertion portion 532, the fourth lower insertion portion 533, and the fourth upper insertion portion 534 is the third lower insertion portion of the rear bus bar 200 in the above embodiment. 231, the third upper insertion part 232, the fourth lower insertion part 233, and the fourth upper insertion part 234 are the same in configuration.

  As shown in FIGS. 8A to 8D, the insulating module 600 includes an insulating sheet 610, a left holding body 620, a right holding body 630, and a connecting body 640.

  The configuration of the insulating sheet 310 is the same as the configuration of the insulating sheet 310 of the insulating module 300 in the above embodiment.

  The left holding body 620, the right holding body 630, and the coupling body 640 are integrally formed of a resin such as PPS and have insulating properties. The left holding body 620, the right holding body 630, and the connecting body 640 are respectively arranged so that the left end portion 610a, the right end portion 610b, and the lower end portion 610c of the insulating sheet 310 are sandwiched between the left end portion 610a, the right end portion 610b, and the lower end portion 610c. 610a, right end 610b and lower end 610c are fixed.

  The left holding body 620 is partitioned into a front side portion 622 and a rear side portion 623 with a central partition 621 interposed therebetween. The partition portion 621 has the same height as the insulating sheet 610, and the insulating sheet 610 is sandwiched between the partition portion 621 and the rear side portion 623. The front side portion 622 is formed with a step surface 622b that is one step lower than the upper surface 622a at the inner portion. A first lower insertion groove 624 that runs up and down along the front surface of the insulating sheet 610 is formed between the step surface 622b and the inner side surface 622d that follows the step surface 622b, and insulation is provided between the upper surface 622a and the subsequent inner side surface 622c. A first upper insertion groove 625 that runs up and down along the front surface of the sheet 610 is formed. The rear side portion 623 has the same configuration as the front side portion 622, and a third lower insertion groove 626 that runs up and down along the rear surface of the insulating sheet 610 is formed between the step surface 623b and the inner surface 623d that follows the step surface 623b. Then, a third upper insertion groove 627 that runs up and down along the rear surface of the insulating sheet 610 is formed between the upper surface 623a and the inner side surface 623c that follows the upper surface 623a. The first lower insertion groove 624 and the first upper insertion groove 625 are formed at positions separated from the front surface of the insulating sheet 610 by the thickness of the partition portion 621, and the third lower insertion groove 626 and the third upper insertion groove The groove 627 is formed in the immediate vicinity of the rear surface of the insulating sheet 610.

  The right holding body 630 is divided into a front side part 632 and a rear side part 633 with a central partition part 631 interposed therebetween. The partition part 631 has the same height as the insulating sheet 610, and the insulating sheet 610 is sandwiched between the partition part 631 and the rear side part 633. The front side portion 632 is formed with a step surface 632b that is one step lower than the upper surface 632a at the inner portion. A second lower insertion groove 634 that runs up and down along the front surface of the insulating sheet 610 is formed between the step surface 632b and the inner side surface 632d that follows the step surface 632b, and insulation is provided between the upper surface 632a and the subsequent inner side surface 632c. A second upper insertion groove 635 that runs up and down along the front surface of the sheet 610 is formed. The rear side portion 633 has the same configuration as the front side portion 632, and a fourth lower insertion groove 636 that runs vertically along the rear surface of the insulating sheet 610 is formed between the step surface 633b and the inner side surface 633d that follows the step surface 633b. A fourth upper insertion groove 637 that runs up and down along the rear surface of the insulating sheet 610 is formed between the upper surface 633a and the inner surface 633c that follows the upper surface 633a. The second lower insertion groove 634 and the second upper insertion groove 635 are formed at positions separated from the front surface of the insulating sheet 610 by the thickness of the partition portion 631, and the fourth lower insertion groove 636 and the fourth upper insertion groove The groove 637 is formed in the immediate vicinity of the rear surface of the insulating sheet 610.

  The connecting body 640 has an elongated flat plate shape on the left and right, and connects the left holding body 620 and the right holding body 630.

  The first lower insertion portion 431 and the first upper insertion portion 432 are respectively downward from above with respect to the first lower insertion groove 624 and the first upper insertion groove 625 (the upper end portion 610d of the insulating sheet 610). To the lower end portion 610c), the second lower insertion portion 433 and the second upper insertion portion 434 are respectively connected to the second lower insertion groove 634 and the second upper insertion groove 635. Inserted from top to bottom. Accordingly, as shown in FIGS. 6A and 6B, the front bus bar 400 is held by the left holding body 620 and the right holding body 630. The third plate portion 430 of the front bus bar 400 includes a first lower insertion portion 431, a first upper insertion portion 432, and a second portion corresponding to the thickness of the partition portion 621 of the left holding body 620 and the partition portion 631 of the right holding body 630. The third plate portion 430 protrudes rearward from the lower insertion portion 433 and the second upper insertion portion 434 and faces the front surface of the insulating sheet 610 in close proximity. In addition, the boundary portion between the third plate portion 430 and the second plate portion 420 is supported from below by the connecting body 640. Note that the third plate portion 430 may be in contact with the insulating sheet 610, or there may be a slight gap between the third plate portion 430 and the insulating sheet 610.

  In addition, the third lower insertion portion 531 and the third upper insertion portion 532 are inserted downward from above into the third lower insertion groove 626 and the third upper insertion groove 627, respectively. The insertion portion 533 and the fourth upper insertion portion 534 are inserted from the upper side to the lower side with respect to the fourth lower insertion groove 636 and the fourth upper insertion groove 637, respectively. Accordingly, as shown in FIGS. 6A and 6B, the rear bus bar 500 is held by the left holding body 620 and the right holding body 630. The third plate portion 530 of the rear bus bar 500 is in close proximity to the rear surface of the insulating sheet 610. Further, the boundary portion between the third plate portion 530 and the second plate portion 520 is supported from below by the connecting body 640. Note that the third plate portion 530 may be in contact with the insulating sheet 610, or there may be a slight gap between the third plate portion 530 and the insulating sheet 610.

  Thus, in the bus bar unit 30, the third plate portion 430 of the front bus bar 400 and the third plate portion 530 of the rear bus bar 500 overlap with each other with the insulating sheet 610 interposed therebetween. The third plate part 430 of the front bus bar 400 and the third plate part 530 of the rear bus bar 500 are insulated by the insulating sheet 610. In the state where the front bus bar 400 and the rear bus bar 500 are mounted on the insulation module 600, the insulating sheet 610 protrudes upward from the third plate portion 430 of the front bus bar 400 and the third plate portion 530 of the rear bus bar 500. ing. For this reason, even if the front bus bar 400 and the rear bus bar 500 move slightly upward, the third plate portions 430 and 530 do not deviate from the region of the insulating sheet 610.

  According to the configuration of this modified example, the front bus bar 400 has a third plate portion 430 in which the first lower insertion portion 431, the first upper insertion portion 432, the second lower insertion portion 433, and the second upper insertion portion. 434, the first lower insertion groove 624, the first upper insertion groove 625, the second lower insertion groove 634, and the second upper insertion groove 635 are insulated sheets. Even if it is formed at a position away from 610, the third plate portion 430 can be brought into close proximity to the front surface of the insulating sheet 610. Therefore, in the left holding body 320 and the right holding body 330 as in the above embodiment, the two insertion grooves (for example, the first lower insertion groove 323 and the third lower insertion groove 324) are insulated. It is not necessary to adopt a configuration that is partitioned by the sheet 310, and the insertion grooves 624, 625, 626, 627, 634, 635, 636, and 637 can be firmly formed, so the left holding body 620 and the right holding body 630 The front bus bar 400 and the rear bus bar 500 can be stably held.

  In addition, since the insulating module 600 is configured such that the left holding body 620 and the right holding body 630 are connected by the connecting body 640, the strength of the insulating module 600 in the left-right direction can be increased. Furthermore, since the strength of the insulation module 600 in the left-right direction is increased, when the front bus bar 400 and the rear bus bar 500 are attached to the insulation module 600, the insulation module 600 is less likely to be deformed, and thus can be easily attached. Become.

  Further, the boundary portion between the third plate portion 430 and the second plate portion 420 of the front bus bar 400 and the boundary portion between the third plate portion 530 and the second plate portion 520 of the rear bus bar 500 are supported from below by the connecting body 640. Therefore, the front bus bar 400 and the rear bus bar 500 can be stably held by the insulating module 600.

<Other changes>
In the above-described embodiment, the left and right ends of the front bus bar 100 have two insertion portions (first lower insertion portion 131 and first upper insertion portion 132, second lower insertion portion 133 and second upper portion, respectively). The insertion part 134) is formed, and these insertion parts correspond to the two corresponding insertion grooves (the first lower insertion groove 323 and the first upper insertion groove 325) of the left holding body 320 and the right holding body 330. The second lower insertion groove 333 and the second upper insertion groove 335) are inserted. Similarly, two insertion portions (a third lower insertion portion 231 and a third upper insertion portion 232, a fourth lower insertion portion 233 and a fourth upper insertion portion are respectively provided on the left and right ends of the rear bus bar 200. 234) are formed, and these insertion portions correspond to the corresponding two insertion grooves (the third lower insertion groove 324, the third upper insertion groove 326, the fourth lower portion) of the left holding body 320 and the right holding body 330. The insertion groove 334 and the fourth upper insertion groove 336) are inserted.

  However, the present invention is not limited to this. For example, one insertion portion is formed at each of the left and right ends of the front bus bar 100, and these insertion portions correspond to one of the left holding body 320 and the right holding body 330. The structure inserted in the insertion groove may be taken. Similarly, for example, one insertion portion is formed at each of the left and right end portions of the rear bus bar 200, and these insertion portions are formed in one corresponding insertion groove of the left holding body 320 and the right holding body 330. The structure inserted may be taken.

  Further, the left holding body 320 and the right holding body 330 may be configured to hold the front bus bar 100 and the rear bus bar 200 by a holding structure different from the structure in which the insertion portion is inserted into the insertion groove.

  Furthermore, the number of capacitor elements 10 is not limited to that of the above embodiment, and can be changed as appropriate according to the required electric capacity. That is, in the above embodiment, two capacitor elements 10 are arranged. However, the present invention is not limited to this. Even when only one capacitor element 10 is arranged, other numbers of capacitor elements 10 may be arranged. Good.

  Furthermore, in the first modified example, the third plate portion 430 of the front bus bar 400 includes the first lower insertion portion 431, the first upper insertion portion 432, the second lower insertion portion 433, and the second upper insertion portion 434. It was set as the structure projected on the insulating sheet 610 side. However, instead of the front bus bar 400 or in addition to the front bus bar 400, the third plate portion 530 of the rear bus bar 500 includes the third lower insertion portion 531, the third upper insertion portion 532, and the fourth lower insertion portion. It may be configured to project from the portion 533 and the fourth upper insertion portion 534 to the insulating sheet 610 side. In this case, the third lower insertion groove 626, the third upper insertion groove 627, the fourth lower insertion groove 636, and the fourth upper insertion groove 637 are the protruding portions of the third plate portion 530 from the rear surface of the insulating sheet 610. It will be formed in the position which was only apart.

  Furthermore, in the said embodiment, the example in which this invention is applied to what is called a case mold type film capacitor 1 with which the filling resin 4 is filled in the case 3 in which the capacitor unit 2 is accommodated was shown. However, the present invention may be applied to a so-called caseless type film capacitor in which the capacitor unit is not accommodated in the case but is covered with an exterior resin.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

  In the description of the above embodiment, the terms indicating directions such as “upward” and “downward” indicate relative directions that depend only on the relative positional relationship of the constituent members, and include vertical and horizontal directions. It does not indicate the absolute direction.

  INDUSTRIAL APPLICABILITY The present invention is useful for film capacitors used in various electronic devices, electrical devices, industrial devices, vehicle electrical equipment, and the like.

DESCRIPTION OF SYMBOLS 1 Film capacitor 10 Capacitor element 11 End surface electrode 12 End surface electrode 20 Bus bar unit 100 Front bus bar (1st bus bar)
110 1st plate part (1st electrode connection part)
120 Second plate part (first relay part)
130 Third plate part (first overlapping part)
131 1st lower insertion part (1st insertion part)
132 1st upper insertion part (1st insertion part)
133 2nd lower insertion part (2nd insertion part)
134 Second upper insertion part (second insertion part)
200 rear bus bar (second bus bar)
210 1st plate part (2nd electrode connection part)
220 Second plate portion (second relay portion)
230 Third plate portion (second overlapping portion)
231 Third lower insertion part (third insertion part)
232 Third upper insertion part (third insertion part)
233 Fourth lower insertion part (fourth insertion part)
234 Fourth upper insertion part (fourth insertion part)
300 Insulation module (insulation part)
310 Insulating sheet 310a Left end (first end)
310b Right end (second end)
320 Left holder (first holder)
321 First lower groove (first groove)
322 first upper groove (first groove)
323 First lower insertion groove (first insertion groove)
324 Third lower insertion groove (third insertion groove)
325 First upper insertion groove (first insertion groove)
326 Third upper insertion groove (third insertion groove)
330 Right holder (second holder)
331 Second lower groove (second groove)
332 Second upper groove (second groove)
333 second lower insertion groove (second insertion groove)
334 Fourth lower insertion groove (fourth insertion groove)
335 second upper insertion groove (second insertion groove)
336 Fourth insertion groove (fourth insertion groove)
30 Busbar unit 400 Front busbar (first busbar)
410 1st plate part (1st electrode connection part)
420 Second plate part (first relay part)
430 Third plate portion (first overlapping portion)
431 First lower insertion part (first insertion part)
432 first upper insertion part (first insertion part)
433 second lower insertion part (second insertion part)
434 Second upper insertion part (second insertion part)
500 rear bus bar (second bus bar)
510 1st plate part (2nd electrode connection part)
520 Second plate part (second relay part)
530 Third plate part (second overlapping part)
531 Third lower insertion part (third insertion part)
532 Third upper insertion part (third insertion part)
533 fourth lower insertion part (fourth insertion part)
534 Fourth upper insertion part (fourth insertion part)
600 Insulation module (insulation part)
610 Insulation sheet 610a Left end (first end)
610b Right end (second end)
610c Lower end (fourth end)
610d Upper end (third end)
620 Left holding body (first holding body)
624 first lower insertion groove (first insertion groove)
625 first upper insertion groove (first insertion groove)
626 Third lower insertion groove (third insertion groove)
627 Third upper insertion groove (third insertion groove)
630 Right holder (second holder)
634 Second lower insertion groove (second insertion groove)
635 second upper insertion groove (second insertion groove)
636 Fourth lower insertion groove (fourth insertion groove)
637 Fourth upper insertion groove (fourth insertion groove)
640 linked body

Claims (6)

A capacitor element;
A first bus bar and a second bus bar connected to the capacitor element;
A first overlapping portion and a second overlapping portion that are respectively included in the first bus bar and the second bus bar and overlap each other;
An insulating part for insulating between the first overlapping part and the second overlapping part,
The insulating portion includes an insulating sheet, a first holding body fixed to a first end of four end portions of the insulating sheet, and a second end opposite to the first end. A second holding body fixed to
In the first holding body and the second holding body, the first overlapping portion is in close proximity to one surface of the insulating sheet, and the second overlapping portion is in close proximity to the other surface of the insulating sheet. Holding the first bus bar and the second bus bar,
A film capacitor characterized by that. The film capacitor according to claim 1,
The first bus bar has a first insertion portion at a portion corresponding to the first holding body and a second insertion portion at a portion corresponding to the second holding body,
The second bus bar has a third insertion portion at a portion corresponding to the first holding body, and a fourth insertion portion at a portion corresponding to the second holding body,
A first insertion groove into which the first insertion portion is inserted is formed in the first holding body along the one surface of the insulating sheet, and the second holding body has the second A second insertion groove into which the insertion part is inserted is formed,
A third insertion groove into which the third insertion portion is inserted is formed in the first holding body along the other surface of the insulating sheet, and the fourth holding hole is formed in the second holding body. A fourth insertion groove into which the insertion part is inserted is formed,
A film capacitor characterized by that. The film capacitor according to claim 2,
Said 1st insertion part thru | or said 4th insertion part are 3rd among the four edge parts in said insulating sheet with respect to said 1st insertion groove | channel or 4th insertion groove | channel, respectively. Inserted from the end toward the fourth end,
The insulating portion is disposed at the position of the fourth end portion, and includes a connecting body that connects the first holding body and the second holding body,
A film capacitor characterized by that. In the film capacitor according to claim 3,
The first bus bar includes a first electrode connecting portion connected to one end face electrode of the capacitor element, and extends from the first electrode connecting portion toward the insulating sheet to the first overlapping portion. And a first relay unit connected to
The second bus bar has a second electrode connecting portion connected to the other end face electrode of the capacitor element, and extends from the second electrode connecting portion toward the insulating sheet to the second overlapping portion. And a second relay unit connected to
The coupling body supports the first bus bar at a boundary portion between the first overlapping portion and the first relay portion, and at a boundary portion between the second overlapping portion and the second relay portion. To support the second bus bar,
A film capacitor characterized by that. The film capacitor according to any one of claims 2 to 4,
The first insertion groove and the third insertion groove are formed on both sides of the insulating sheet by partitioning the first groove portion for forming these insertion grooves with the insulating sheet,
The second insertion groove and the fourth insertion groove are formed on both sides of the insulating sheet by partitioning the second groove portion for forming these insertion grooves with the insulating sheet,
A film capacitor characterized by that. The film capacitor according to any one of claims 2 to 4,
At least one overlapping portion of the first overlapping portion and the second overlapping portion protrudes to the insulating sheet side from two insertion portions corresponding to the overlapping portion.
A film capacitor characterized by that.