Capacitor module and manufacturing method of the capacitor module

Abstract

To provide a capacitor module capable of improving positional accuracy of a capacitor element, a bus bar, and a case, and provide a manufacturing method of the capacitor module.SOLUTION: A capacitor module according to an embodiment of the present disclosure includes: a capacitor assembly having a capacitor element having an end surface electrode and a bus bar electrically connected to the end surface electrode; a case housing the capacitor assembly; and a sealing resin filled in the case. The bus bar includes: a capacitor connection part disposed along an extending surface of the end surface electrode; a base part extending in a direction away from the capacitor element from the capacitor connection part; and a tip end part extending from the base part. The base part is provided with an engagement part for engaging with a jig for holding the capacitor assembly.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a capacitor module and a method for manufacturing the same. [Background technology]

[0002] 2. Description of the Related Art A capacitor module is known in which a capacitor element and a bus bar are housed in a case and sealed with a sealing resin.

[0003] For example, Patent Document 1 discloses a capacitor including a case, a capacitor element, a first bus bar, a second bus bar, and a filler. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-017661 Summary of the Invention [Problem to be solved by the invention]

[0005] The capacitor described in Patent Document 1 still has room for improvement in terms of improving the positional accuracy of the capacitor element and bus bars relative to the case.

[0006] The present disclosure provides a capacitor module that can improve the positional accuracy of a capacitor element, a bus bar, and a case, and a method for manufacturing the same. [Means for solving the problem]

[0007] A capacitor module according to one aspect of the present disclosure includes: a capacitor assembly including a capacitor element having an end electrode and a bus bar electrically connected to the end electrode; a case that houses the capacitor assembly; a sealing resin filled in the case; Equipped with the bus bar includes a capacitor connection portion disposed along a surface on which the end surface electrode extends, a base portion extending from the capacitor connection portion in a direction away from the capacitor element, and a tip portion extending from the base portion; The base is provided with a locking portion that is engaged with a jig that holds the capacitor assembly.

[0008] A method for manufacturing a capacitor module according to one aspect of the present disclosure includes: 1. A method for manufacturing a capacitor module, comprising: a step of assembling a capacitor assembly including: a capacitor element having an end surface electrode; a capacitor connection portion electrically connected to the end surface electrode and disposed along a surface on which the end surface electrode extends; and a bus bar including a base portion extending from the capacitor connection portion in a direction away from the capacitor element; and a tip portion extending from the base portion, the bus bar having a locking portion provided on the base portion; a step of holding the capacitor assembly using a jig, wherein the jig is engaged with the engaging portion of the base and the jig clamps the base, thereby holding the capacitor assembly with the jig; housing the capacitor assembly held by the jig in a case; filling the case with a sealing resin while holding the capacitor assembly with the jig; Includes. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to provide a capacitor module with improved positional accuracy between the capacitor element, bus bar, and case, and a method for manufacturing the same. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic perspective view showing a capacitor module according to a first embodiment; [Figure 2] FIG. 2 shows a capacitor assembly of the capacitor module of FIG. 1. [Figure 3] Another view of the capacitor module in Figure 1 [Figure 4] FIG. 4 shows a capacitor assembly of the capacitor module of FIG. 3. [Figure 5] Cross section AA of Figure 1 [Figure 6] Cross section B-B of Figure 3 [Figure 7] A flowchart illustrating a method for manufacturing the capacitor module of FIG. 1. [Figure 8] Schematic diagram showing an example of a jig [Figure 9] A diagram showing the capacitor assembly being held by two jigs [Figure 10] Cross-sectional view showing a part of Figure 9 [Figure 11] A diagram showing the capacitor assembly housed in the case [Figure 12] A diagram showing the state in which the case containing the capacitor assembly held by the jig is filled with sealing resin. [Figure 13] FIG. 10 is a schematic cross-sectional view showing a part of a capacitor assembly of a capacitor module according to a first modification of the first embodiment. [Figure 14] FIG. 14 is a schematic cross-sectional view showing the capacitor assembly of FIG. 13 held by a jig; [Figure 15] FIG. 10 is a schematic cross-sectional view showing a part of a capacitor assembly of a capacitor module according to a second modification of the first embodiment. [Figure 16] FIG. 16 is a schematic cross-sectional view showing the capacitor assembly of FIG. 15 held by a jig; DETAILED DESCRIPTION OF THE INVENTION

[0011] (Background to this disclosure) When manufacturing a capacitor module, after connecting a bus bar to a capacitor element, the capacitor element and bus bar are housed in a case and filled with sealing resin. When filling with sealing resin, the capacitor element and bus bar are sometimes held in place by a jig to ensure that they are properly positioned relative to the case. At this time, protrusions on the jig may be inserted into holes in the bus bar for bolt fastening to securely hold the capacitor element and bus bar and position them relative to the case.

[0012] Conventionally, holes provided in the bus bar have been used as holes for inserting bolts when connecting the capacitor module to an external device. During the manufacturing of the capacitor module, the bolt holes have been used to fix the capacitor element and bus bar with a jig when filling the sealing resin, thereby positioning the capacitor element and bus bar relative to the case.

[0013] In recent years, with the improvement of laser welding technology, the electrical connection between capacitor modules and external devices is increasingly being performed by laser welding. In this case, since no bolt holes are formed in the bus bar, it is not possible to reliably position the capacitor element and bus bar using a jig, and a solution is needed.

[0014] For example, Patent Document 1 discloses a capacitor in which the case has protrusions extending from the bottom and / or sidewalls to form gaps with the inner surfaces of the sidewalls, and the second bus bar has an upright portion that extends along the side of the capacitor element toward the opening of the case. Patent Document 1 further discloses that the upright portion has through holes, and the bus bar and capacitor element are positioned relative to the case by inserting the protrusions into the through holes.

[0015] However, the capacitor module described in Patent Document 1 has room for improvement in the accuracy of positioning the capacitor elements and bus bars relative to the case. Additionally, the capacitor module described in Patent Document 1 has a problem in that the case must be formed into a complex shape, which increases manufacturing costs.

[0016] Therefore, the present inventors have studied capacitor modules that can overcome these problems and have arrived at the following invention.

[0017] (Embodiment 1) [Overall configuration] FIG. 1 is a schematic perspective view showing a capacitor module 1 according to a first embodiment. FIG. 2 is a view showing a capacitor assembly 10 of the capacitor module 1 of FIG. 1. FIG. 3 is a view showing the capacitor module 1 of FIG. 1 from another direction. FIG. 4 is a view showing the capacitor assembly 10 of the capacitor module 1 of FIG. 3. FIG. 5 is a cross-sectional view taken along line AA in FIG. 1. FIG. 6 is a cross-sectional view taken along line BB in FIG. 3. The X, Y, and Z directions in the drawings respectively indicate the horizontal, vertical, and height directions of the capacitor module 1.

[0018] 1 to 6, capacitor module 1 includes capacitor assembly 10, case 40, and sealing resin 50. In capacitor module 1, a portion of capacitor assembly 10 is housed in case 40 and sealed with sealing resin 50. Of capacitor assembly 10, a portion of bus bar 30, i.e., base portions 31 and 36 and tip ends 32 and 37 of bus bar 30, is exposed from sealing resin 50. By connecting tip ends 32 and 37 of bus bar 30 to terminals of an external device, capacitor module 1 can be electrically connected to the external device.

[0019] <Capacitor assembly> 2 and 4, the capacitor assembly 10 includes a capacitor element 20 and a bus bar 30. The capacitor assembly 10 is assembled by electrically connecting the bus bar 30 to end surface electrodes 21, 22 of the capacitor element 20. In this embodiment, the capacitor assembly 10 includes two capacitor elements 20.

[0020] The capacitor element 20 has end electrodes including a first end electrode 21 and a second end electrode 22. In other words, the capacitor element 20 has a pair of end electrodes 21, 22. The capacitor element 20 is formed in a columnar shape with an oval cross section. The shape of the capacitor element 20 is not limited to this, and it can be any shape such as a cylinder or a rectangular pillar.

[0021] Capacitor element 20 is, for example, a film capacitor composed of a laminate of dielectric films. Capacitor element 20 is formed by stacking dielectric films, each having a metal vapor deposition film formed on its surface, and then rolling them. In this embodiment, the rolled dielectric film is pressed into a flat shape, thereby forming capacitor element 20 into a columnar shape with an oval cross section. End electrodes 21 and 22 are provided on both end faces of capacitor element 20. End electrodes 21 and 22 can be formed, for example, by spraying a conductive material such as Zn onto the end faces of the rolled dielectric film.

[0022] The bus bar 30 is electrically connected to the end surface electrodes 21, 22 of the capacitor element 20, and is a member for electrically connecting the capacitor element 20 to an external device (not shown). In this embodiment, the capacitor element 20 has two end surface electrodes including the first end surface electrode 21 and the second end surface electrode 22, and therefore the bus bar 30 includes two bus bars: a first bus bar 30a connected to the first end surface electrode 21 and a second bus bar 30b connected to the second end surface electrode 22.

[0023] Each bus bar 30 has capacitor connection portions 33, 38 connected to the end surface electrodes, base portions 31, 36 extending from the capacitor connection portions 33, 38 in directions away from the capacitor element 20, and tip portions 32, 37 extending from the base portions 31, 36. The base portions 31, 36 of the bus bar 30 are provided with locking portions 60 that lock with a jig (not shown) that holds the capacitor assembly 10.

[0024] 2 and 4, the first bus bar 30a has a first capacitor connecting portion 33 connected to the first end surface electrode 21, a first base portion 31, and a first tip portion 32. In the present embodiment, the first capacitor connecting portion 33 is disposed along the first end surface electrode 21 of the capacitor element 20. The first capacitor connecting portion 33 and the first end surface electrode 21 can be connected by, for example, soldering.

[0025] The first base portion 31 has a first portion 31a that is bent at an end of the capacitor element 20 and arranged along the side surface of the capacitor element 20, and a second portion 31b that extends from the first portion 31a in a direction away from the capacitor element 20. A first tip portion 32 extends from a portion of the second portion 31b of the first base portion 31. More specifically, a portion of the second portion 31b of the first base portion 31 protrudes in the planar direction to form a protruding portion 31c, and the first tip portion 32 extends further in the planar direction from the protruding portion 31c. In this embodiment, the tip of the protruding portion 31 of the first base portion 31 is bent or curved, and the first tip portion 32 refers to the portion beyond the bent or curved portion. In this embodiment, the first tip portion 32 refers to the portion where the insulating paper 70 is not disposed. Because the first tip portion 32 is used for welding, it is formed in a flat plate shape without any holes or recesses.

[0026] A first locking portion 61 is provided on the second portion 31b of the first base portion 31. In this embodiment, as shown in FIG. 2, the first locking portion 61 is provided on the protruding portion 31c of the first base portion 31. In this embodiment, the first locking portion 61 is a through hole provided in the first base portion 31 of the busbar 30.

[0027] The second bus bar 30b has a configuration similar to that of the first bus bar 30a. As shown in Figures 3 and 5, the second bus bar 30b has a second capacitor connecting portion 38 connected to the second end surface electrode 22, a second base portion 36, and a second tip portion 37. In this embodiment, the second capacitor connecting portion 38 is disposed along the second end surface electrode 22 of the capacitor element 20. The second capacitor connecting portion 38 and the second end surface electrode 22 can be connected by, for example, soldering.

[0028] The second base portion 36 has a third portion 36a that is bent at an end of the capacitor element 20 and arranged along the side surface of the capacitor element 20, and a fourth portion 36b that extends from the third portion 36a in a direction away from the capacitor element 20. A second tip portion 37 extends from a portion of the fourth portion 36b of the second base portion 36. More specifically, a portion of the fourth portion 36b of the second base portion 36 protrudes in the planar direction to form a protruding portion 36c, and the second tip portion 37 extends further in the planar direction from the protruding portion 36c. In this embodiment, the second tip portion 37 refers to a portion where the insulating paper 70 is not disposed. Because the second tip portion 37 is used for welding, it is formed in a flat plate shape without any holes or recesses.

[0029] A second locking portion 66 is provided on the fourth portion 36b of the second base portion 36. In this embodiment, as shown in FIG. 4, the second locking portion 66 is provided on the protruding portion 36c of the second base portion 36. In this embodiment, the second locking portion 66 is a through hole provided in the second base portion 36 of the bus bar 30.

[0030] In this embodiment, the extending surface of the first tip portion 32 is positioned so as to be shifted from the extending surface of the first base portion 31. With this configuration, the first tip portion 32 and the second tip portion 37 can be arranged on the same plane.

[0031] Here, the locking portion including the first locking portion 61 and the second locking portion 66 is a portion that locks a part of a jig (not shown) for holding the capacitor assembly 10. By inserting protrusions that match the shape of the through holes of the locking portions 61 and 66 provided on the jig into the locking portions 61 and 66, the locking portions 61 and 66 and the protrusions fit together, allowing the jig to hold the first bus bar 30a and the second bus bar 30b. By inserting the protrusions into the through holes of the locking portions 61 and 66, it is possible to prevent the first bus bar 30a and the second bus bar 30b from falling off the jig. The jig will be described in detail later.

[0032] As shown in FIGS. 2 and 4 , in this embodiment, at least a portion of the first base portion 31 of the first bus bar 30a and at least a portion of the second base portion 36 of the second bus bar 30b are overlapped with insulating paper 70 interposed therebetween. In this embodiment, the second portion 31b of the first base portion 31 and the fourth portion 36b of the second base portion 36 are overlapped with insulating paper 70 interposed therebetween. By overlapping the second portion 31b of the first base portion 31 and the fourth portion 36b of the second base portion 36 with insulating paper 70 interposed therebetween, it is possible to prevent a short circuit between the first bus bar 30a and the second bus bar 30b. Furthermore, because currents flow in opposite directions through the first bus bar 30a and the second bus bar 30b, overlapping a portion of the first bus bar 30a and a portion of the second bus bar 30b cancels out magnetic fields generated by the currents flowing therethrough, thereby reducing the inductance of the capacitor module 1.

[0033] In this embodiment, the insulating paper 70 is arranged to overlap the second portion 31b and the protruding portion 31c of the first base portion 31, and the fourth portion 36b and the protruding portion 36c of the second base portion 36. In this specification, the base portions 31, 36 of the bus bar 30 refer to the portions that extend from the capacitor connecting portions 33, 38 to the portions that overlap with the insulating paper 70.

[0034] 1 to 4, first locking portion 61 provided on first bus bar 30a and second locking portion 66 provided on second bus bar 30b are arranged at positions offset from each other in the direction in which insulating paper 70 extends, i.e., in a direction parallel to the YZ plane. By arranging first locking portion 61 and second locking portion 66 at positions offset from each other in the direction parallel to the YZ plane, capacitor assembly 10 can be stably held by a jig.

[0035] 1 to 4, insulating paper 70 is arranged so as to cover protruding portions 31c and 36c of first base portion 31 and second base portion 36, respectively. In other words, insulating paper 70 is arranged so as to overlap both first locking portion 61 and second locking portion 66. By arranging insulating paper 70 so as to overlap both first locking portion 61 and second locking portion 66, it is possible to ensure a creepage distance between first bus bar 30a and second bus bar 30b.

[0036] The insulating paper 70 is arranged to cover the second portion 31b of the first base portion 31 and the fourth portion 36b of the second base portion 36. The insulating paper 70 is arranged to cover the protruding portion 31c of the first base portion 31 and the protruding portion 36c of the second base portion 36. Here, the insulating paper 70 covering a portion of the first base portion 31 or the second base portion 36 means that the insulating paper 70 and a portion of the first base portion 31 or the second base portion 36 overlap in the X direction. The insulating paper 70 is formed to have an area larger than the area of the overlapping portion of the first base portion 31 and the second base portion 36, i.e., the area of the protruding portion 31c of the first base portion 31 and the area of the protruding portion 36c of the second base portion 36. Because the area of the insulating paper 70 is larger than the area of the overlapping portion of the first base portion 31 and the second base portion 36, the creepage distance between the first bus bar 30a and the second bus bar 30b can be increased.

[0037] <Case> The case 40 is a member for housing the capacitor assembly 10. In this embodiment, the case 40 has a bottom surface 41 and an opening 42 at a position opposite the bottom surface 41. In this embodiment, the case 40 is formed into a box-like shape with a rectangular parallelepiped appearance. The shape of the case 40 is not limited to this, and may be any shape that can house the capacitor assembly 10 and seal it with the sealing resin 50. The case 40 can be formed from, for example, a synthetic resin.

[0038] <Sealing resin> The sealing resin 50 is filled into the case 40 and seals the capacitor assembly 10 housed in the case 40. The sealing resin 50 can be made of a thermosetting resin such as an epoxy resin or a urethane resin.

[0039] [Manufacturing method] A method for manufacturing the capacitor module 1 will be described with reference to Fig. 7 and Fig. 8 to Fig. 12. Fig. 7 is a flowchart for explaining the method for manufacturing the capacitor module 1 of Fig. 1. Fig. 8 to Fig. 12 are diagrams showing the manufacturing process of the capacitor module 1 of Fig. 1.

[0040] First, in step S1 of FIG. 7 , the capacitor assembly 10 is assembled. The capacitor assembly 10 can be formed by electrically connecting the first bus bar 30a and the second bus bar 30b to the first end surface electrode 21 and the second end surface electrode 22 of the capacitor element 20, respectively. Specifically, the capacitor connection portion 33 of the first bus bar 30a is electrically connected to the first end surface electrode 21 of the capacitor element 20, and the capacitor connection portion 38 of the second bus bar 30b is electrically connected to the second end surface electrode 22 of the capacitor element 20. The electrical connection between the end surface electrodes 21, 22 and the capacitor connection portions 33, 38 can be achieved by, for example, soldering or welding. As described above, insulating paper 70 is placed where the first bus bar 30a and the second bus bar 30b overlap.

[0041] Next, in step S2, the assembled capacitor assembly 10 is held by a jig 80. FIG. 8 is a schematic diagram showing an example of the jig 80. As shown in FIG. 8, the jig 80 is, for example, a member having a plate-shaped main body 81 on which protrusions 82 are formed. In this embodiment, two jigs 80 shown in FIG. 8 are used facing each other to hold the capacitor assembly 10 by sandwiching the first bus bar 30a and the second bus bar 30b. Note that in this embodiment, the two jigs 80 are configured to have the same shape, but the shape of each of the jigs 80 may be any shape that can hold the capacitor assembly 10.

[0042] FIG. 9 is a diagram showing a state in which the capacitor assembly 10 is held by two jigs 80. FIG. 10 is a cross-sectional view showing a portion of FIG. 9. As shown in FIG. 9, the capacitor assembly 10 can be held by sandwiching the first base portion 31 and the first tip portion 32 of the first bus bar 30a and the second base portion 36 and the second tip portion 37 of the second bus bar 30b between two jigs 80, including a first jig 80a and a second jig 80b. At this time, as shown in FIG. 10, the protrusions 82 of the jigs 80 are inserted into the first locking portion 61 and the second locking portion 66, respectively. That is, the protrusion 82 of the first jig 80a is inserted into the first locking portion 61, and the protrusion 82 of the second jig 80b is inserted into the second locking portion 66. By locking the jigs 80 with the first locking portion 61 and the second locking portion 66, the capacitor assembly 10 can be stably held by the jigs 80.

[0043] Next, in step S3, the capacitor assembly 10 is housed in the case 40 while being held by the jig 80. FIG. 11 is a diagram showing the capacitor assembly 10 housed in the case 40. As shown in FIG. 11, the capacitor assembly 10 is inserted into the case 40 while being held by the jig 80. After the capacitor assembly 10 is inserted into the case 40, the case 40 and the jig 80 are fixed by another manufacturing device not shown.

[0044] Finally, in step S4, the case 40 is filled with sealing resin 50, and the sealing resin 50 is cured to complete the capacitor module 1. FIG. 12 shows the state in which the case 40 containing the capacitor assembly 10 held by the jig 80 has been filled with sealing resin 50. As shown in FIG. 1, the jig 80 holds the capacitor assembly 10 when filling the case 40 with the sealing resin 50. When holding the capacitor assembly 10 with the jig 80, the locking portions 61, 66 provided on the first bus bar 30a and the second bus bar 30b are locked with the jig 80, thereby holding the capacitor assembly 10 with the jig 80 so that it does not move within the case 40. This makes it possible to prevent the capacitor assembly 10 from shifting in position due to the pressure of the sealing resin 50 when filling the case 40 with the sealing resin 50.

[0045] [effect] According to the above-described embodiment, the following effects can be achieved.

[0046] The capacitor module 1 includes a capacitor assembly 10, a case 40, and a sealing resin 50. The capacitor assembly 10 includes a capacitor element 20 having end electrodes 21 and 22, and a bus bar 30 electrically connected to the end electrodes 21 and 22. The case 40 houses the capacitor assembly 10. The case 40 is filled with the sealing resin 50. The bus bar 30 includes capacitor connection portions 33 and 38 arranged along the surfaces along which the end electrodes 21 and 22 extend, base portions 31 and 36 extending from the capacitor connection portions 33 and 38 in directions away from the capacitor element 20, and tip portions 32 and 37 extending from the base portions 31 and 36. The base portions 31 and 36 are provided with locking portions 61 and 66 that lock with a jig that holds the capacitor assembly 10.

[0047] With this configuration, it is possible to provide a capacitor module that can improve the positional accuracy of the capacitor elements and bus bars relative to the case.

[0048] The end surface electrodes include a first end surface electrode 21 and a second end surface electrode 22. The bus bar 30 includes a first bus bar 30a connected to the first end surface electrode 21 and having a first base portion 31, and a second bus bar 30b connected to the second end surface electrode 22 and having a second base portion 36. A first locking portion 61 is provided on the first base portion 31, and a second locking portion 66 is provided on the second base portion 36. At least a portion of the first base portion 31 of the first bus bar 30a and at least a portion of the second base portion 36 of the second bus bar 30b are arranged to overlap with insulating paper 70 interposed therebetween.

[0049] With this configuration, the inductance of the capacitor module 1 can be reduced.

[0050] The first locking portion 61 provided on the first base portion 31 and the second locking portion 66 provided on the second base portion are disposed at positions offset in the surface direction of the insulating paper .

[0051] This configuration can improve the stability when the capacitor assembly 10 is held by a jig.

[0052] The insulating paper 70 overlaps both the first locking portion 61 and the second locking portion 66 .

[0053] A creepage distance between first bus bar 30a and second bus bar 30b can be ensured.

[0054] The size of the insulating paper 70 is larger than the area of the portion where the first base portion 31 and the second base portion 36 overlap.

[0055] With this configuration, the creepage distance between the first bus bar 30a and the second bus bar 30b can be increased.

[0056] The locking portions 61 and 66 are through holes.

[0057] The manufacturing method of the capacitor module 1 includes the steps of assembling a capacitor assembly 10 having a capacitor element 20 and a bus bar 30, holding the capacitor assembly 10 with a jig 80, housing the capacitor assembly 10 in a case 40, and filling the case 40 with sealing resin 50.

[0058] By using this method, it is possible to prevent the capacitor assembly 10 from being misaligned with the case 40 when the sealing resin 50 is filled into the case 40 .

[0059] The jig 80 includes a first jig and a second jig. In the step of holding the capacitor assembly 10 with the jig 80, the capacitor assembly 10 is held by sandwiching the bases 31, 36 between the first jig and the second jig.

[0060] By using such a method, the capacitor assembly 10 can be held more stably, and therefore displacement of the capacitor assembly 10 when the sealing resin 50 is filled can be more effectively prevented.

[0061] [Variations] In the above-described embodiment, the capacitor assembly 10 has two capacitor elements 20. However, the capacitor assembly 10 is not limited to this. The capacitor assembly 10 may have one capacitor element 20 or three or more capacitor elements 20.

[0062] In the above-described embodiment, the first bus bar 30a and the second bus bar 30b are provided with the locking portions 61 and 66, respectively, but the present invention is not limited to this. The locking portions may be provided on either the first bus bar 30a or the second bus bar 30b.

[0063] In the above-described embodiment, the first base 31 and the second base 36 have the protrusions 31c and 36c, but the present invention is not limited to this. The first base 31 and the second base 36 may not have protrusions, and the locking portions 61 and 66 may be provided at the overlapping portions of the first base 31 and the second base 36.

[0064] In the above-described embodiment, an example has been described in which the capacitor assembly 10 is held using two jigs, the first jig 80a and the second jig 80b, but the present invention is not limited to this. The capacitor assembly 10 may be held by one jig, or may be held by multiple jigs.

[0065] Fig. 13 is a schematic cross-sectional view showing a part of a capacitor assembly 110 of a capacitor module according to Modification 1 of Embodiment 1. Fig. 14 is a schematic cross-sectional view showing a state in which capacitor assembly 110 of Fig. 13 is held by a jig 180.

[0066] 13 and 14, the locking portion 161 may be a recessed portion provided in the first base portion 131. In this case, the height h1 of the protrusion 182 provided in the main body portion 181 of the jig 180 is formed to be smaller than the depth h2 of the locking portion 161. Although not shown, a similar recessed portion may also be provided in the second base portion 136.

[0067] Fig. 15 is a schematic cross-sectional view showing a part of a capacitor assembly 210 of a capacitor module according to Modification 2 of Embodiment 1. Fig. 16 is a schematic cross-sectional view showing a state in which capacitor assembly 210 of Fig. 15 is held by a jig 280.

[0068] 15 and 16, the locking portion 261 may be a protrusion provided on the first base portion 231. In this case, a recess 282 is provided in the main body portion 281 of the jig 280. Although not shown, a protrusion may also be provided on the second base portion 236 in a similar manner.

[0069] (Outline of the embodiment) (1) A capacitor module according to one aspect of the present disclosure includes a capacitor assembly having a capacitor element with an end surface electrode and a bus bar electrically connected to the end surface electrode, a case that houses the capacitor assembly, and a sealing resin that fills the case. The bus bar includes a capacitor connection portion that is arranged along the surface along which the end surface electrode extends, a base portion that extends from the capacitor connection portion in a direction away from the capacitor element, and a tip portion that extends from the base. The base portion is provided with a locking portion that locks with a jig that holds the capacitor assembly.

[0070] (2) In the capacitor module of (1), the end surface electrodes include a first end surface electrode and a second end surface electrode, the bus bars include a first bus bar connected to the first end surface electrode and having a first base, and a second bus bar connected to the second end surface electrode and having a second base, the first base having a first locking portion and the second base having a second locking portion, the first bus bar including the first base and the first locking portion, and the second bus bar including the second base and the second locking portion, and at least a portion of the first base of the first bus bar and at least a portion of the second base of the second bus bar may be arranged overlapping each other with insulating paper interposed therebetween.

[0071] (3) In the capacitor module of (2), the first locking portion provided on the first base and the second locking portion provided on the second base may be positioned offset in the surface direction of the insulating paper.

[0072] (4) In the capacitor module of (2) or (3), the insulating paper may overlap both the first locking portion and the second locking portion.

[0073] (5) In the capacitor module of any one of (2) to (4), the size of the insulating paper may be larger than the area of the portion where the first base portion and the second base portion overlap.

[0074] (6) In the capacitor module of any one of (1) to (5), the locking portion may be a through-hole, a recess, or a protrusion provided in the base.

[0075] (7) A method for manufacturing a capacitor module according to one aspect of the present disclosure is a method for manufacturing a capacitor module, the method including the steps of assembling a capacitor assembly having a capacitor element having an end surface electrode, a capacitor connection portion electrically connected to the end surface electrode and arranged along the surface along which the end surface electrode extends, a base portion extending from the capacitor connection portion in a direction away from the capacitor element, and a bus bar including a tip portion extending from the base, the bus bar having a locking portion provided on the base; holding the capacitor assembly using a jig, wherein the jig is engaged with the locking portion of the base and clamps the base with the jig to hold the capacitor assembly with the jig; placing the capacitor assembly held by the jig in a case; and filling the case with sealing resin while holding the capacitor assembly with the jig.

[0076] (8) In the method for manufacturing a capacitor module of (7), the jig may include a first jig and a second jig, and the step of holding the capacitor assembly with the jig may include holding the capacitor assembly with the jig by clamping the base between the first jig and the second jig. [Industrial Applicability]

[0077] The present disclosure is useful for capacitor modules used in various electronic devices, electrical devices, industrial devices, vehicle devices, etc., and for methods of manufacturing the same. [Explanation of symbols]

[0078] 1 Capacitor Module 10, 110, 210 Capacitor Assembly 20 Capacitor element 21 1st end electrode 22 2nd end electrode 30 Busbar 30a 1st bus bar 30b Second bus bar 31, 131, 231 1st base 32 1st tip 33 First capacitor connection 36, 136, 236 2nd base 37 Second tip 38 Second capacitor connection 40 cases 50 Sealing resin 60, 161, 261 Locking part 61 First locking portion 66 Second locking part 70 insulating paper 80, 180, 280 jig 80a First jig 80b Second jig

Claims

1. a capacitor assembly including a capacitor element having an end electrode and a bus bar electrically connected to the end electrode; a case that houses the capacitor assembly; a sealing resin filled in the case; Equipped with the bus bar includes a capacitor connection portion disposed along a surface on which the end surface electrode extends, a base portion extending from the capacitor connection portion in a direction away from the capacitor element, and a tip portion extending from the base portion; The base is provided with a locking portion that locks with a jig that holds the capacitor assembly. Capacitor module.

2. the end surface electrodes include a first end surface electrode and a second end surface electrode, the bus bars include a first bus bar connected to the first end surface electrode and having a first base portion, and a second bus bar connected to the second end surface electrode and having a second base portion, The first base portion is provided with a first locking portion, The second base portion is provided with a second locking portion, at least a portion of the first base portion of the first bus bar and at least a portion of the second base portion of the second bus bar are arranged to overlap with each other via insulating paper. The capacitor module according to claim 1 .

3. a first locking portion provided on the first base portion and a second locking portion provided on the second base portion are disposed at positions offset from each other in a surface direction of the insulating paper; The capacitor module according to claim 2 .

4. the insulating paper overlaps both the first locking portion and the second locking portion; The capacitor module according to claim 3 .

5. The size of the insulating paper is larger than the area of the overlapping portion between the first base portion and the second base portion. The capacitor module according to claim 2 .

6. The locking portion is a through hole, a recess, or a protrusion provided in the base portion. The capacitor module according to claim 1 .

7. 1. A method for manufacturing a capacitor module, comprising: a step of assembling a capacitor assembly including: a capacitor element having an end surface electrode; a capacitor connection portion electrically connected to the end surface electrode and disposed along a surface on which the end surface electrode extends; and a bus bar including a base portion extending from the capacitor connection portion in a direction away from the capacitor element; and a tip portion extending from the base portion, the bus bar having a locking portion provided on the base portion; a step of holding the capacitor assembly using a jig, wherein the jig is engaged with the engaging portion of the base and the jig clamps the base, thereby holding the capacitor assembly with the jig; housing the capacitor assembly held by the jig in a case; filling the case with a sealing resin while holding the capacitor assembly with the jig; Including, A method for manufacturing a capacitor module.

8. The jig includes a first jig and a second jig, the step of holding the capacitor assembly with the jig includes holding the capacitor assembly with the jig by sandwiching the base between the first jig and the second jig. The method for manufacturing the capacitor module according to claim 7 .

Images