Capacitor and method for manufacturing capacitor

Abstract

The present invention addresses the problem of providing a capacitor for which it is not necessary to prepare a mold for manufacturing the whole exterior body for each change in specifications. A capacitor (1) comprises a capacitor element (2), an exterior body (3) that accommodates the capacitor element (2), and a resin cured product (4) that is filled into the exterior body (3) and seals the capacitor element (2). The exterior body (3) includes a housing part (5) having an accommodation space (7) that accommodates the capacitor element (2), and an attachment part (30) that can be attached to an external device and is coupled to the housing part (5). In the accommodation space (7), at least part of a bonding location between the housing part (5) and the attachment part (30) is buried in the resin cured product (4).

Description

Capacitor and method of manufacturing the capacitor

[0001] The present disclosure relates generally to capacitors and methods of manufacturing capacitors, and more particularly to capacitors with exterior bodies and methods of manufacturing capacitors.

[0002] Patent Document 1 discloses a case-molded capacitor that includes a capacitor element having both end faces, a pair of bus bars connected to both end faces of the capacitor element, and a case that houses the capacitor element together with a filling resin.

[0003] In the case-molded capacitor of Patent Document 1, the case has legs with mounting holes for mounting to an external device. The case is made of resin and is usually manufactured using a mold.

[0004] However, with the case-molded capacitor of Patent Document 1, if the specifications of the legs need to be changed, the entire case must be remanufactured, even if the specifications of the portion that houses the capacitor element remain unchanged.In other words, there was a problem in that the mold for manufacturing the case had to be remanufactured in response to a change in the specifications of the legs.

[0005] An object of the present disclosure is to provide a capacitor and a method for manufacturing a capacitor that does not require the preparation of a mold for manufacturing the entire exterior body every time specifications are changed.

[0006] JP 2010-267775 A

[0007] A capacitor according to one aspect of the present disclosure includes a capacitor element, an exterior housing that houses the capacitor element, and a cured resin that is filled in the exterior housing and seals the capacitor element. The exterior housing includes a housing having a housing space that houses the capacitor element, and an attachment portion that is attachable to an external device and is connected to the housing. At least a portion of the connection portion between the housing and the attachment portion is embedded in the cured resin within the housing space.

[0008] A capacitor according to one aspect of the present disclosure includes a capacitor element, an exterior housing that houses the capacitor element, and a cured resin that is filled in the exterior housing and seals the capacitor element. The exterior housing includes a housing portion having an accommodation space that houses the capacitor element, and at least one replacement part selected from multiple types of replacement parts that can be coupled to the housing portion and attached to an external device.

[0009] A method for manufacturing a capacitor according to one aspect of the present disclosure includes the steps of: housing a capacitor element in an exterior body; filling the exterior body with a liquid curable resin to immerse the capacitor element in the liquid curable resin; and curing the liquid curable resin. The exterior body includes a housing having a housing space for housing the capacitor element, and at least one replacement part selected from multiple types of replacement parts that can be coupled to the housing and attached to an external device.

[0010] According to the present disclosure, there is no need to prepare a mold for manufacturing the entire exterior body every time specifications are changed.

[0011] FIG. 1 is an exploded perspective view of a capacitor according to a first embodiment. FIG. 2 is a perspective view showing the capacitor during manufacturing. FIG. 3 is a perspective view of the capacitor. FIG. 4 is a front view of a capacitor element. FIG. 5 is a left side view of the capacitor element. FIG. 6 is a right side view of the capacitor element. FIG. 7 is a plan view of a housing. FIG. 8 is a front cross-sectional view of the housing. FIG. 9 is a left side cross-sectional view of the housing. FIG. 10 is a bottom view of a color-type replacement part (consisting of only one). FIG. 11 is a side view (partially cross-sectional) of the color-type replacement part. FIG. 12 is a perspective view of a nut-type replacement part (consisting of only one). FIG. 13 is an exploded perspective view of a nut-type replacement part. FIG. 14 is a side view (partially cross-sectional) of the nut-type replacement part. FIG. 15 is a perspective view of a lock-type replacement part (consisting of only one). FIG. 16 is a bottom view showing the replacement part with locking specifications. FIG. 17 is a side view (partial cross-sectional view) showing the replacement part with locking specifications. FIG. 18 is a perspective view showing the replacement part with positioning pin specifications (consisting of only one part). FIG. 19 is a bottom view showing the replacement part with positioning pin specifications. FIG. 20 is a side view showing the replacement part with positioning pin specifications. FIG. 21 is an exploded perspective view showing the capacitor according to a second embodiment. FIG. 22 is a perspective view showing the capacitor in the middle of its manufacture. FIG. 23 is a perspective view showing the capacitor. FIG. 24 is a plan view showing the housing. FIG. 25 is a front cross-sectional view showing the housing. FIG. 26 is a left side cross-sectional view showing the housing. FIG. 27 is a bottom view showing the replacement part with collar specifications (consisting of two parts). FIG. 28 is a side view (partial cross-sectional view) showing the replacement part with collar specifications. FIG. 29 is a perspective view showing the replacement part with nuts (consisting of two parts). Fig. 30 is an exploded perspective view showing the nut-type replacement part of the same. Fig. 31 is a side view (partial cross-sectional view) showing the nut-type replacement part of the same. Fig. 32 is a perspective view showing the locking-type replacement part (consisting of two parts). Fig. 33 is a bottom view showing the locking-type replacement part of the same. Fig. 34 is a side view showing the locking-type replacement part of the same. Fig. 35 is a perspective view showing the positioning pin-type replacement part (consisting of two parts).Fig. 36 is a bottom view showing the replacement part with a positioning pin. Fig. 37 is a side view showing the replacement part with a positioning pin. Fig. 38 is a front cross-sectional view showing a modified example of the capacitor according to the first embodiment. Fig. 39 is a front cross-sectional view showing another modified example of the capacitor.

[0012] 1. Overview As described above, the case-molded capacitor of Patent Document 1 has a problem in that if the specifications of the legs need to be changed, the entire case must be remanufactured, even if the specifications of the portion that houses the capacitor element remain unchanged.

[0013] Therefore, the present inventors have conducted extensive research to solve the above problems, and as a result have developed the following method for manufacturing the capacitor 1.

[0014] That is, the manufacturing method of the capacitor 1 according to this embodiment includes an accommodating step, a filling step, and a curing step. In the accommodating step, the capacitor element 2 is accommodated in the exterior body 3 as shown in Fig. 2. In the filling step, the exterior body 3 is filled with a liquid curable resin to bury the capacitor element 2 in the liquid curable resin. In the curing step, the liquid curable resin is cured as shown in Fig. 3.

[0015] In particular, in this embodiment, the exterior body 3 includes a housing 5 and a replacement part 6 selected from multiple types of replacement parts 6. Therefore, when the specifications of the housing 5 are not changed but the specifications of the replacement part 6 are changed, the capacitor 1 can be manufactured simply by replacing the replacement part 6 before the change (for example, the replacement part 6 with a collar specification shown in FIGS. 10 and 11) with the replacement part 6 after the change (for example, the replacement part 6 with a nut specification shown in FIGS. 12 to 14).

[0016] Therefore, according to this embodiment, it is not necessary to prepare a mold for manufacturing the entire exterior body 3 every time there is a change in specifications.

[0017] The term "mounting portion" as used in this specification and claims is a broad concept that includes "replacement portion." Multiple types of replacement portion 6 may be developed simultaneously, or only one type may be developed initially, with subsequent developments based on irregular needs. In other words, it is conceivable that only one type of replacement portion 6 is available at the time of manufacturing the capacitor 1. Furthermore, even if multiple types of replacement portion 6 are not available, the capacitor 1 can be manufactured with only one type of replacement portion 6.

[0018] Therefore, in this specification, the term "mounting portion" is used as a broad concept that includes "replacement portion." That is, the term "replacement portion" is used assuming that multiple types are prepared at the time of manufacturing the capacitor 1. On the other hand, the term "mounting portion" is used assuming that even if only one type is prepared at the time of manufacturing the capacitor 1, there is a possibility that second or subsequent types may be developed in response to occasional needs thereafter. However, in the following description, "replacement portion" may be read as "mounting portion."

[0019] 2. Details (1) First Embodiment (1.1) Capacitor A capacitor 1 according to a first embodiment will now be described with reference to FIGS. 1 to 20. The drawings are schematic, and the size and thickness ratios of the components in the drawings do not necessarily reflect the actual dimensional ratios. Arrows indicating directions in the drawings (arrows indicating the up-down, left-right, and front-to-rear directions) are not intended to define the directions in which the capacitor 1 is used; they are merely provided to facilitate understanding of the description and have no substance. The direction in which the housing 5 opens is the up-down direction, the direction in which the first end surface electrode 21 and the second end surface electrode 22 are aligned is the left-to-right direction, and the direction perpendicular to the up-down and left-to-right directions is the front-to-rear direction. A view along the up-down direction is referred to as a plan view, and a view along the left-to-right direction is referred to as a side view. This also applies to the second embodiment described below.

[0020] 1 to 3, the capacitor 1 according to the first embodiment includes a capacitor element 2, a bus bar 8, an exterior body 3, and a cured resin material 4. Each of the components will be described below in order.

[0021] <Capacitor Element> The capacitor element 2 is not particularly limited, but examples thereof include a wound capacitor element and a multilayer capacitor element.

[0022] 4 to 6, the capacitor element 2 has an element body 20, a first end surface electrode 21, and a second end surface electrode 22. The capacitor element 2 is embedded in a cured resin 4, as shown in FIG.

[0023] The shape of the element body 20 is not particularly limited, and examples thereof include a cylindrical shape, an elliptical cylindrical shape, and a rectangular parallelepiped shape. The element body 20 has a first surface 201 (left surface), a second surface 202 (right surface), and an outer peripheral surface 203. The first surface 201 is a surface facing left. The second surface 202 is a surface facing right, and is the surface opposite the first surface 201. The outer peripheral surface 203 is a surface connecting the outer peripheral edge of the first surface 201 and the outer peripheral edge of the second surface 202.

[0024] The element body 20 includes a dielectric film, a first internal electrode, and a second internal electrode. Inside the element body 20, the first internal electrode and the second internal electrode face each other via the dielectric film. The material of the first internal electrode and the second internal electrode is not particularly limited, but examples thereof include aluminum (Al), magnesium (Mg), and alloys thereof. Note that the first internal electrode and the second internal electrode are not shown in FIGS. 1 to 6 .

[0025] The outer peripheral surface 203 of the element body 20 is formed of an electrically insulating film such as a dielectric film. The material of the dielectric film is not particularly limited, but examples thereof include polypropylene (PP) and polyethylene terephthalate (PET).

[0026] A portion of the first internal electrode is exposed on the first surface 201 and is not exposed on the second surface 202. A portion of the second internal electrode is exposed on the second surface 202 and is not exposed on the first surface 201.

[0027] The first end surface electrode 21 is formed by spraying a metal onto the first surface 201. This electrically connects the first end surface electrode 21 to the first internal electrode. The metal to be sprayed is not particularly limited, but examples thereof include zinc (Zn), tin (Sn), and alloys thereof.

[0028] Similar to the first end surface electrode 21, the second end surface electrode 22 is also formed by spraying metal onto the second surface 202. As a result, the second end surface electrode 22 is electrically connected to the second internal electrode.

[0029] <Busbar> The busbar 8 is a conductive member that is interposed between the capacitor element 2 and an external device (not shown, the same applies below) and is used to electrically connect the capacitor element 2 and the external device. The busbar 8 is formed by cutting a metal plate into a predetermined shape and then bending it appropriately. The metal plate is not particularly limited, but examples thereof include a copper plate and an aluminum plate. The external device is not particularly limited, but examples thereof include an inverter case for an electric vehicle or the like.

[0030] 4 to 6 , the bus bar 8 includes a first bus bar 81 and a second bus bar 82. The first bus bar 81 is connected to the first end surface electrode 21, and the second bus bar 82 is connected to the second end surface electrode 22. Hereinafter, when simply referring to the bus bar 8, this refers to both the first bus bar 81 and the second bus bar 82.

[0031] The first bus bar 81 has a first internal terminal portion 831, a first external terminal portion 841, and a first relay terminal portion 851. The first bus bar 81 is buried in the cured resin 4 except for a portion of the first external terminal portion 841 (see FIG. 3 ).

[0032] The first internal terminal portion 831 is overlapped with the first end surface electrode 21. The first internal terminal portion 831 has a plurality of (two in the first embodiment) first connection pins 861 and a first claw hole 871. The first connection pins 861 are electrically connected to the first end surface electrode 21 by solder or the like. The first claw hole 871 opens to the left.

[0033] The first external terminal portion 841 is a portion that is connected to an external device and extends upward.

[0034] The first relay terminal portion 851 is a portion that relays between the first internal terminal portion 831 and the first external terminal portion 841, and extends in the front-to-rear direction. The first internal terminal portion 831 extends downward from the left end of the first relay terminal portion 851. The first external terminal portion 841 extends upward from the rear end of the first relay terminal portion 851. The front end of the first relay terminal portion 851 is curved downward.

[0035] The second bus bar 82 has a second internal terminal portion 832, a second external terminal portion 842, and a second relay terminal portion 852. The second bus bar 82 is buried in the cured resin 4 except for a portion of the second external terminal portion 842 (see FIG. 3 ).

[0036] The second internal terminal portion 832 is overlapped with the second end surface electrode 22. The second internal terminal portion 832 has a plurality of second connection pins 862 (two in the first embodiment) and a second claw hole 872. The second connection pins 862 are electrically connected to the second end surface electrode 22 by solder or the like. The second claw hole 872 opens to the right.

[0037] The second external terminal portion 842 is a portion that is connected to an external device and extends upward.

[0038] The second relay terminal portion 852 is a portion that relays between the second internal terminal portion 832 and the second external terminal portion 842, and extends in the front-to-rear direction. The second internal terminal portion 832 extends downward from the right end of the second relay terminal portion 852. The second external terminal portion 842 extends upward from the rear end of the second relay terminal portion 852. The front end of the second relay terminal portion 852 is curved downward.

[0039] 2 , the exterior body 3 houses the capacitor element 2. The exterior body 3 has a housing shape that opens upward. The material of the exterior body 3 is not particularly limited, but examples thereof include polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), and epoxy resin (EP).

[0040] As shown in FIGS. 1 to 3, the exterior body 3 includes a housing part 5 and at least one replacement part 6 (one in the first embodiment).

[0041] <Case> As shown in FIG. 1 , the case 5 has an accommodation space 7 that accommodates the capacitor element 2. The case 5 is open upward. Specifically, as shown in FIGS. 7 to 9 , the case 5 has a bottom plate 50 and a peripheral wall 55. The bottom plate 50 has a rectangular shape in a plan view. The peripheral wall 55 rises upward from the outer periphery of the bottom plate 50. The height of the peripheral wall 55 is constant. In this way, the accommodation space 7 is a space surrounded by the bottom plate 50 and the peripheral wall 55.

[0042] The bottom plate 50 has a bottom surface 50a. The bottom surface 50a faces upward and is the surface facing the storage space 7. On the other hand, the peripheral wall 55 has an inner peripheral surface 55a. The inner peripheral surface 55a faces inward and is the surface facing the storage space 7. In this way, the housing 5 has a surface facing the storage space 7.

[0043] A first fitting portion 91 is present at the upper end of the peripheral wall 55. In the first embodiment, a case where the first fitting portion 91 is the protrusion 56 is described, but the first fitting portion 91 is not limited to the protrusion 56. In this way, the housing 5 has the first fitting portion 91.

[0044] The protrusion 56 protrudes upward. In plan view, the protrusion 56 exists along the peripheral wall 55. In other words, the protrusion 56 has a rectangular frame shape in plan view.

[0045] The peripheral wall 55 includes a left wall 51, a right wall 52, a front wall 53, and a rear wall 54. The left wall 51 and the right wall 52 face each other in the left-right direction. The front wall 53 and the rear wall 54 face each other in the front-rear direction.

[0046] The right surface of the left wall 51 has a plurality of positioning pieces 511 (two in the first embodiment) and a plurality of latch pieces 512 (two in the first embodiment). The two positioning pieces 511 protrude to the right and extend upward from the bottom surface 50a. The two latch pieces 512 are located between the two positioning pieces 511 and extend upward from the bottom surface 50a. A claw portion 513 is located at the tip of each of the two latch pieces 512. The claw portion 513 fits into the first claw hole 871 of the first bus bar 81 when the capacitor element 2 is accommodated in the accommodation space 7.

[0047] The left surface of the right wall 52 has a plurality of positioning pieces 521 (two in the first embodiment) and a plurality of latch pieces 522 (two in the first embodiment). The two positioning pieces 521 protrude to the left and extend upward from the bottom surface 50a. The two latch pieces 522 are located between the two positioning pieces 521 and extend upward from the bottom surface 50a. A claw portion 523 is located at the tip of each of the two latch pieces 522. The claw portion 523 fits into the second claw hole 872 of the second bus bar 82 when the capacitor element 2 is accommodated in the accommodation space 7.

[0048] The left-right distance between the two positioning pieces 511 and the two positioning pieces 521 is approximately equal to the left-right length of the capacitor element 2. The two positioning pieces 511 and the two positioning pieces 521 are used to determine the left-right position of the capacitor element 2 within the accommodation space 7.

[0049] The two latch pieces 512 and the two latch pieces 522 are used to temporarily fix the capacitor element 2 in the accommodating space 7 .

[0050] A plurality of (six in the first embodiment) positioning pieces 531 are provided on the rear surface of the front wall 53. The six positioning pieces 531 protrude rearward and extend upward from the bottom surface 50a.

[0051] A plurality of (four in the first embodiment) positioning pieces 541 are provided on the front surface of the rear wall 54. The four positioning pieces 541 protrude forward and extend upward from the bottom surface 50a.

[0052] The distance in the front-to-rear direction between the six positioning pieces 531 and the four positioning pieces 541 is approximately equal to the length in the front-to-rear direction of the capacitor element 2. The six positioning pieces 531 and the four positioning pieces 541 are used to determine the position of the capacitor element 2 in the accommodating space 7 in the front-to-rear direction.

[0053] <<Replacement Part>> The replacement part 6 is selected from a plurality of types (four types in the first embodiment) of replacement parts 6. Specifically, a plurality of types of replacement parts 6 are prepared in advance before manufacturing the capacitor 1, and a replacement part 6 having the required specifications is selected from the plurality of types of replacement parts 6 in accordance with the specifications of the capacitor 1 to be attached to the external device.

[0054] Each of the multiple types of replacement parts 6 can be coupled to the housing part 5 and attached to an external device. Four types of replacement parts 6 will be described below with reference to Figures 1 to 3 and 10 to 20. The four types of replacement parts 6 are a collar-type replacement part 6, a nut-type replacement part 6, a lock-type replacement part 6, and a positioning pin-type replacement part 6. However, the types of replacement parts 6 are not limited to these.

[0055] [Color specification] As shown in Figures 1 to 3, 10 and 11, the color specification replacement part 6 has a frame-shaped part 60, a plurality of (two in the first embodiment) lateral protrusions 63, and a plurality of (two in the first embodiment) collars 64.

[0056] The frame portion 60 is rectangular in plan view and has substantially the same shape and dimensions as the peripheral wall 55 of the housing 5.

[0057] 10 , a second fitting portion 92 is present on the underside of the frame-shaped portion 60. The second fitting portion 92 fits into the first fitting portion 91. In the first embodiment, a case where the second fitting portion 92 is the recess 600 is described, but the second fitting portion 92 is not limited to the recess 600. In this way, the replacement unit 6 has the second fitting portion 92.

[0058] The recess 600 is recessed upward. In plan view, the recess 600 exists along the frame-shaped portion 60. In other words, the recess 600 has a rectangular frame shape in plan view. In plan view, the recess 600 has approximately the same shape and size as the protrusion 56 of the peripheral wall 55. Therefore, the protrusion 56 can fit into the recess 600. In this way, the color-specification replacement portion 6 can be connected to the housing portion 5.

[0059] When the color-equipped replacement part 6 and the housing part 5 are joined, a seam is created. This seam is the joining point 9 between the color-equipped replacement part 6 and the housing part 5 (see Figures 2 and 3). At the joining point 9, a first fitting part 91 and a second fitting part 92 are fitted together. The height of the joining point 9 is approximately the same as the height of the peripheral wall 55. In a plan view, the joining point 9 surrounds the storage space 7 in a rectangular shape. Note that the first fitting part 91 may be the recessed part 600, and the second fitting part 92 may be the protruding part 56.

[0060] The frame-shaped portion 60 has an inner peripheral surface 60a and an outer peripheral surface 60b. The inner peripheral surface 60a faces the inside of the frame-shaped portion 60 (the penetrating portion) and faces the storage space 7 (see FIG. 2). In this way, the color-specification replacement portion 6 has a surface facing the storage space 7. The outer peripheral surface 60b faces the outside of the frame-shaped portion 60 and is the surface opposite to the inner peripheral surface 60a.

[0061] The frame-shaped portion 60 has a left side portion 601, a right side portion 602, a front side portion 603, and a rear side portion 604. The left side portion 601 corresponds to the left wall 51, the right side portion 602 corresponds to the right wall 52, the front side portion 603 corresponds to the front wall 53, and the rear side portion 604 corresponds to the rear wall 54.

[0062] Two lateral protrusions 63 are present on the outer peripheral surface 60b of the frame-shaped portion 60. The two lateral protrusions 63 protrude laterally from the outer peripheral surface 60b. Specifically, the first lateral protrusion 63 protrudes to the left from the outer peripheral surface 60b of the left side portion 601. The second lateral protrusion 63 protrudes to the right from the outer peripheral surface 60b of the right side portion 602.

[0063] The collars 64 are cylindrical metal rings. The two collars 64 correspond one-to-one to the two lateral protrusions 63. The collars 64 are embedded in the lateral protrusions 63. The collars 64 embedded in the lateral protrusions 63 penetrate in the vertical direction. In this way, the collar-type replacement part 6 can be attached to an external device by using the collars 64.

[0064] 12 to 14, the nut-type replacement part 6 has a frame-shaped part 60, a plurality of (two in the first embodiment) lateral protrusions 63, and a plurality of (two in the first embodiment) nuts 66. The frame-shaped part 60 and the lateral protrusions 63 have been described above, so detailed description thereof will be omitted.

[0065] The two nuts 66 correspond one-to-one to the two lateral protrusions 63. The nuts 66 are embedded in the lateral protrusions 63. The nuts 66 embedded in the lateral protrusions 63 penetrate in the vertical direction. In this way, the nut-type replacement part 6 can be attached to an external device by using the nuts 66.

[0066] 15 to 17, the replacement unit 6 with the locking feature has a frame-shaped portion 60 and a plurality of (two in the first embodiment) locking claws 68. The frame-shaped portion 60 has been described above, so a detailed description thereof will be omitted.

[0067] Two locking claws 68 are present on the outer peripheral surface 60b of the frame-shaped portion 60. The two locking claws 68 protrude laterally from the outer peripheral surface 60b. Specifically, the first locking claw 68 protrudes to the left from the outer peripheral surface 60b of the left side portion 601. The second locking claw 68 protrudes to the right from the outer peripheral surface 60b of the right side portion 602. If the external device has a portion into which the two locking claws 68 can be fitted, the locking replacement part 6 can be attached to the external device by using the locking claws 68.

[0068] 18 to 20 , the replacement part 6 with the positioning pin specification has a frame-shaped part 60, a plurality of (two in the first embodiment) lateral protrusions 63, and a plurality of (two in the first embodiment) positioning pins 69. The frame-shaped part 60 and the lateral protrusions 63 have been described above, so detailed description thereof will be omitted.

[0069] The two positioning pins 69 (first positioning pin 691 and second positioning pin 692) correspond one-to-one to the two lateral protrusions 63. The two positioning pins 69 protrude upward from the lateral protrusions 63. If the external device has a portion into which the two positioning pins 69 can be inserted, the positioning pin-specification replacement unit 6 can be attached to the external device by using the positioning pins 69.

[0070] 18 and 20 , by making the shapes of the two positioning pins 69 different, it is possible to prevent the capacitor 1 from being oriented incorrectly when attaching it to an external device. That is, the outer diameter of the first positioning pin 691 is smaller than the outer diameter of the second positioning pin 692. The first positioning pin 691 has a protrusion 69a extending in the vertical direction on its outer periphery. The second positioning pin 692 has a hole 69b that opens upward.

[0071] <Cured Resin> As shown in Fig. 3, the cured resin 4 is filled into the exterior housing 3 to seal the capacitor element 2. The cured resin 4 is formed by curing a liquid curable resin, and has electrical insulating properties. The curable resin is not particularly limited, but examples thereof include thermosetting resins and photocurable resins. Photocurable resins include ultraviolet curable resins. Specifically, the curable resin is not particularly limited, but examples thereof include epoxy resins.

[0072] The cured resin 4 has an exposed surface 40. The exposed surface 40 is the surface exposed to the outside, and is the upper surface. The exposed surface 40 is located above the bonding points 9. In other words, all bonding points 9 within the storage space 7 are buried within the cured resin 4. In this way, the cured resin 4 contacts the inner circumferential surface 55a of the housing part 5 and the inner circumferential surface 60a of the replacement part 6 via the bonding points 9. In this way, the cured resin 4 bonds the housing part 5 and the replacement part 6 together.

[0073] 3 , a portion of the first external terminal portion 841 of the first bus bar 81 and a portion of the second external terminal portion 842 of the second bus bar 82 extend upward from the exposed surface 40 of the cured resin material 4. The capacitor 1 can be charged or discharged through the first bus bar 81 and the second bus bar 82 exposed to the outside from the exposed surface 40.

[0074] (1.2) Modifications As shown in FIG. 38 , the replacement part 6 may have a protrusion 31. Specifically, the protrusion 31 protrudes from the inner peripheral surface 60a of the frame part 60 into the storage space 7. The shape of the protrusion 31 is not particularly limited, and examples thereof include a cylindrical shape, a rectangular pillar shape, and a plate shape. Although not shown, the shape of the protrusion 31 may be continuous with the latch piece 512, the latch piece 522, the positioning piece 511, the positioning piece 521, the positioning piece 531, or the positioning piece 541 of the housing part 5.

[0075] At least a part of the protrusion 31 (the whole part in FIG. 38 ) is embedded in the cured resin 4. A part of the protrusion 31 may protrude from the exposed surface 40 of the cured resin 4.

[0076] As described above, the replacement part 6 has the protrusions 31, which bite into the cured resin 4, providing an anchor effect, making the replacement part 6 even less likely to come off the housing part 5.

[0077] 39, the replacement part 6 may have a recessed portion 32. Specifically, the recessed portion 32 is recessed from the inner peripheral surface 60a toward the outer peripheral surface 60b of the frame-shaped part 60. The shape of the recessed portion 32 is not particularly limited, but examples thereof include a cylindrical shape, a rectangular pillar shape, and a plate shape.

[0078] At least a part of the recess 32 (the entirety in FIG. 39 ) is buried in the cured resin 4. A part of the recess 32 may protrude from the exposed surface 40 of the cured resin 4.

[0079] As described above, since the replacement part 6 has the recessed part 32, the cured resin 4 bites into the recessed part 32, providing an anchor effect, making the replacement part 6 even less likely to come off the housing part 5.

[0080] The replacement part 6 may have both the protrusion 31 and the recess 32 .

[0081] (1.3) Method for Manufacturing Capacitor Next, a method for manufacturing the capacitor 1 according to the first embodiment will be described. The method for manufacturing the capacitor 1 includes a housing step, a filling step, and a curing step. Each step will be described in order below. When manufacturing the capacitor 1, a replacement part 6 with the required specifications is selected from multiple types of replacement parts 6 (four types in the first embodiment).

[0082] 2 , in the accommodating step, the capacitor element 2 is accommodated in the exterior body 3. At this time, the capacitor element 2 is positioned in the left-right and front-rear directions by the positioning pieces 511, 521, 531, and 541 of the housing part 5. Furthermore, the claw portions 513 of the housing part 5 fit into the first claw holes 871 of the first bus bar 81, and the claw portions 523 of the housing part 5 fit into the second claw holes 872 of the second bus bar 82. This temporarily fixes the capacitor element 2 in the accommodation space 7.

[0083] In the accommodation step, the housing 5 and the replacement part 6 are joined together. That is, the frame part 60 of the replacement part 6 is placed on the peripheral wall 55 of the housing 5, and the convex part 56 of the peripheral wall 55 is fitted into the concave part 600 of the frame part 60. At this time, the housing 5 and the replacement part 6 may be joined together using an adhesive.

[0084] The timing for coupling the housing part 5 and the replacement part 6 may be before the capacitor element 2 is housed in the housing part 5 or after the capacitor element 2 is housed in the housing part 5 .

[0085] <Filling Step> In the filling step, the exterior body 3 is filled with a liquid curable resin to bury the capacitor element 2 in the liquid curable resin. As a result, when the liquid curable resin is cured to form a cured resin 4, the capacitor element 2 can be sealed by the cured resin 4.

[0086] Preferably, the joint 9 between the housing part 5 and the replaceable part 6 is buried in liquid curable resin within the storage space 7. This allows the housing part 5 and the replaceable part 6 to be bonded together by the cured resin 4 when the liquid curable resin hardens to form the cured resin 4. In this case, it is desirable to take into consideration the cure shrinkage of the liquid curable resin used and to prevent the exposed surface 40 of the cured resin 4 from being lower than the joint 9.

[0087] <Curing Step> In the curing step, the liquid curable resin is cured. As a result, the liquid curable resin becomes a cured resin 4 (see FIG. 3). If the liquid curable resin is thermosetting, it becomes a cured resin 4 by heating. If the liquid curable resin is photocurable (ultraviolet curable), it becomes a cured resin 4 by irradiating it with light (ultraviolet light).

[0088] Preferably, the liquid curable resin is cured while being in contact with the housing part 5 and the replaceable part 6. This makes it easier for the cured resin 4 to fix the housing part 5 and the replaceable part 6 together.

[0089] When the curing process is completed, a capacitor 1 as shown in Figure 3 is obtained. This capacitor 1 is a capacitor 1 in which a colored replacement part 6 is used.

[0090] (1.4) Effects In the first embodiment, the exterior body 3 includes a housing 5 and a replaceable part 6 selected from multiple types of replaceable parts 6. Therefore, when the specifications of the replaceable part 6 are changed while the specifications of the housing 5 are not changed, the capacitor 1 can be manufactured simply by replacing the pre-change replaceable part 6 (e.g., a replaceable part 6 with a collar) with the changed replaceable part 6 (e.g., a replaceable part 6 with a nut).

[0091] In this way, the mold for manufacturing the housing 5 can be reused before and after changes to the replaceable part 6. In other words, there is no need to manufacture a mold for manufacturing the entire exterior body 3 when specifications for the replaceable part 6 are changed, which leads to a reduction in mold manufacturing costs. Furthermore, only one mold is required in principle to manufacture the housing 5, which accounts for most of the exterior body 3, and it is only necessary to prepare molds for manufacturing the replaceable part 6 for the number of specification changes, which also reduces mold storage space.

[0092] As described above, according to the first embodiment, there is no need to prepare a mold for manufacturing the entire exterior body 3 every time there is a change in specifications.

[0093] In addition, in the first embodiment, the housing part 5 and the replacement part 6 each have a surface facing the storage space 7, so that the liquid curable resin poured into the storage space 7 can easily come into contact with the housing part 5 and the replacement part 6.

[0094] Furthermore, in the first embodiment, the joint 9 is buried in the liquid curable resin in the filling step, and the liquid curable resin is cured in the curing step while in contact with the casing 5 and the replaceable part 6. In this way, after the liquid curable resin has cured, the joint 9 between the casing 5 and the replaceable part 6 is buried in the cured resin 4. Therefore, the cured resin 4 can fix the casing 5 and the replaceable part 6. As a result, the cured resin 4 makes it difficult for the replaceable part 6 to come off the casing 5.

[0095] In addition, in the first embodiment, the first fitting portion 91 of the housing portion 5 and the second fitting portion 92 of the replacement portion 6 are fitted together, making it even more difficult for the replacement portion 6 to come off the housing portion 5 .

[0096] (2) Second Embodiment (2.1) Capacitor Next, a capacitor 1 according to a second embodiment will be described with reference to Figures 21 to 37. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and detailed description thereof may be omitted.

[0097] In the second embodiment, the structure of the exterior body 3 differs from the structure of the exterior body 3 in the first embodiment. The structures of the capacitor element 2 and the bus bar 8 are the same as the structures of the capacitor element 2 and the bus bar 8 in the first embodiment.

[0098] 22 , the exterior body 3 houses the capacitor element 2. The exterior body 3 has a housing shape that opens upward. The material of the exterior body 3 is the same as the material of the exterior body 3 in the first embodiment.

[0099] 21 to 23 , the exterior body 3 includes a housing 5 and at least one (two in the second embodiment) replacement part 6. In the first embodiment, the exterior body 3 includes only one replacement part 6, but in the second embodiment, the exterior body 3 includes two replacement parts 6.

[0100] <Case> As shown in FIG. 21 , the case 5 has an accommodation space 7 that accommodates the capacitor element 2. The case 5 is open upward. Specifically, as shown in FIGS. 24 to 26 , the case 5 has a bottom plate 50 and a peripheral wall 55. The bottom plate 50 is rectangular in plan view. The peripheral wall 55 rises upward from the outer periphery of the bottom plate 50. The height of the peripheral wall 55 is constant except for a portion, and the upper end of the peripheral wall 55 is rectangular in plan view. In this way, the accommodation space 7 is a space surrounded by the bottom plate 50 and the peripheral wall 55.

[0101] The left wall 51 has a first side opening 571. The first side opening 571 is rectangular in side view and opens left and right and upward. A first fitting portion 91 is present in the first side opening 571. In the second embodiment, a case where the first fitting portion 91 is the recess 58 will be described, but the first fitting portion 91 is not limited to the recess 58. In this way, the housing 5 has the first fitting portion 91.

[0102] The recess 58 exists along the inner circumferential surface of the first side opening 571. In other words, the recess 58 is generally U-shaped in side view.

[0103] The right wall 52 has a second side opening 572. The second side opening 572 is rectangular in side view and opens left and right and upward. A recess 58 is present in the second side opening 572. The recess 58 is present along the inner circumferential surface of the second side opening 572. In other words, the recess 58 is generally U-shaped in side view.

[0104] The second side opening 572 has the same shape and size as the first side opening 571. In a side view, the position of the second side opening 572 coincides with the position of the first side opening 571.

[0105] <<Replacement Part>> The replacement part 6 is selected from a plurality of types (four types in the second embodiment) of replacement parts 6. Specifically, a plurality of types of replacement parts 6 are prepared in advance before manufacturing the capacitor 1, and a replacement part 6 having the required specifications is selected from the plurality of types of replacement parts 6 in accordance with the specifications of the capacitor 1 to be attached to the external device.

[0106] Here, the second embodiment differs from the first embodiment in that one type of replacement unit 6 includes a plurality of physically separated replacement units 6 (two in the second embodiment). In the first embodiment, one type of replacement unit 6 includes only a single replacement unit 6.

[0107] In the second embodiment, each of the multiple types of replaceable parts 6 can be coupled to the housing 5 and attached to an external device. Four types of replaceable parts 6 will be described below with reference to Figures 21 to 23 and 27 to 37. The four types of replaceable parts 6 are a collar-type replaceable part 6, a nut-type replaceable part 6, a lock-type replaceable part 6, and a positioning pin-type replaceable part 6. However, the types of replaceable parts 6 are not limited to these.

[0108] [Color Specification] As shown in FIGS. 21 to 23, 27 and 28, the color specification replacement part 6 is made up of two replacement parts 6 (a first replacement part 61 and a second replacement part 62).

[0109] The first replacement part 61 is a member that is attached to the first side opening 571 of the housing part 5. The first replacement part 61 has a plate part 610, a lateral protrusion part 63, and a collar 64.

[0110] The plate portion 610 is a portion that can close the first side opening 571. The plate portion 610 has a rectangular shape when viewed from the side. When viewed from the side, the plate portion 610 has approximately the same shape and size as the first side opening 571. The thickness of the plate portion 610 is approximately equal to the thickness of the left wall 51. Second fitting portions 92 are present on the front end surface, bottom end surface, and rear end surface of the plate portion 610. The second fitting portions 92 fit into the first fitting portions 91. In the second embodiment, a case is described in which the second fitting portions 92 are protrusions 611, but the second fitting portions 92 are not limited to the protrusions 611. In this way, the replacement unit 6 has the second fitting portions 92.

[0111] The protrusion 611 protrudes forward, downward, and rearward and is generally U-shaped in side view. In side view, the protrusion 611 has approximately the same shape and size as the recess 58 of the first side opening 571. Therefore, when the plate 610 is inserted into the first side opening 571 from above, the protrusion 611 can fit into the recess 58. In this way, the first replacement part 61 can be connected to the housing part 5.

[0112] When the first replacement part 61 and the housing part 5 are joined, a seam is formed. This seam is the joining point 9 between the first replacement part 61 and the housing part 5 (see Figures 22 and 23). At the joining point 9, the first fitting part 91 and the second fitting part 92 are fitted together. The joining point 9 is substantially U-shaped in side view. Note that the first fitting part 91 may be the convex part 611, and the second fitting part 92 may be the concave part 58.

[0113] The plate portion 610 has an inner surface 61a and an outer surface 61b. The inner surface 61a can be part of the inner circumferential surface 55a of the peripheral wall 55 and faces the storage space 7 (see FIG. 22). In this way, the first replacement part 61 has a surface facing the storage space 7. The outer surface 61b is the surface opposite the inner surface 61a.

[0114] The lateral protrusion 63 is present on the outer surface 61b of the plate portion 610. The lateral protrusion 63 protrudes laterally (to the left) from the outer surface 61b. A reinforcing rib 61c is provided at the corner formed by the underside of the lateral protrusion 63 and the outer surface 61b of the plate portion 610 (see FIGS. 27 and 28). The reinforcing rib 61c prevents the lateral protrusion 63 from tilting relative to the plate portion 610.

[0115] The collar 64 is a cylindrical metal ring. The collar 64 is embedded in the lateral protrusion 63. The collar 64 embedded in the lateral protrusion 63 penetrates in the vertical direction. In this way, the first replacement part 61 can be attached to an external device by using the collar 64.

[0116] The second replacement part 62 is a member attached to the second side opening 572 of the housing part 5. When coupled to the housing part 5, the second replacement part 62 is simply arranged symmetrically to the first replacement part 61, and has the same shape and size as the first replacement part 61, so a detailed description thereof will be omitted. Note that the plate part 620, the convex part 621, the inner surface 62a, the outer surface 62b, the reinforcing rib 62c, the lateral protrusion 63, and the collar 64 of the second replacement part 62 correspond to the plate part 610, the convex part 611, the inner surface 61a, the outer surface 61b, the reinforcing rib 61c, the lateral protrusion 63, and the collar 64 of the first replacement part 61, respectively.

[0117] [Nut Type] As shown in FIGS. 29 to 31, the nut type replacement part 6 is made up of two replacement parts 6 (a first replacement part 61 and a second replacement part 62).

[0118] The first replacement part 61 has a plate part 610, a lateral protrusion part 63, and a nut 66. The plate part 610 and the lateral protrusion part 63 have been described above, and therefore detailed description thereof will be omitted.

[0119] The nut 66 is embedded in the lateral protrusion 63. The nut 66 embedded in the lateral protrusion 63 penetrates in the vertical direction. In this way, the nut-type first replacement part 61 can be attached to an external device by using the nut 66.

[0120] The second replacement part 62 is simply arranged symmetrically to the first replacement part 61 when coupled to the housing part 5, and has the same shape and size as the first replacement part 61, so a detailed description thereof will be omitted. Note that the plate part 620, the convex part 621, the inner surface 62a, the outer surface 62b, the lateral protrusions 63, and the nut 66 of the second replacement part 62 correspond to the plate part 610, the convex part 611, the inner surface 61a, the outer surface 61b, the lateral protrusions 63, and the nut 66 of the first replacement part 61, respectively.

[0121] [Lock Type] As shown in FIGS. 32 to 34, the lock type replacement part 6 is made up of two replacement parts 6 (a first replacement part 61 and a second replacement part 62).

[0122] The first replacement unit 61 has a plate portion 610, a latch piece 680, and a locking claw 68. The plate portion 610 has been described above, and therefore a detailed description thereof will be omitted.

[0123] The latch piece 680 is present on the outer surface 61b of the plate portion 610. The latch piece 680 protrudes from the outer surface 61b and extends upward.

[0124] The locking claw 68 is located at the tip of the latch piece 680. If the external device has a portion into which the locking claw 68 can be fitted, the locking first replacement part 61 can be attached to the external device by using the locking claw 68.

[0125] The second replacement part 62 is simply arranged symmetrically to the first replacement part 61 when coupled to the housing part 5, and has the same shape and size as the first replacement part 61, so a detailed description thereof will be omitted. Note that the plate part 620, the convex part 621, the inner surface 62a, the outer surface 62b, the latch piece 680, and the lock claw 68 of the second replacement part 62 correspond to the plate part 610, the convex part 611, the inner surface 61a, the outer surface 61b, the latch piece 680, and the lock claw 68 of the first replacement part 61, respectively.

[0126] [Locating Pin Specification] As shown in FIGS. 35 to 37, the replacing part 6 of the locating pin specification is made up of two replacing parts 6 (a first replacing part 61 and a second replacing part 62).

[0127] The first replacement part 61 has a plate part 610, a lateral protrusion part 63, and a positioning pin 69 (first positioning pin 691). The plate part 610 and the lateral protrusion part 63 are as described above, and therefore detailed description thereof will be omitted.

[0128] The first positioning pin 691 protrudes upward from the lateral protrusion 63. If the external device has a portion into which the first positioning pin 691 can be inserted, the first replacement part 61 with positioning pin specifications can be attached to the external device by using the first positioning pin 691.

[0129] The second replacement part 62 is simply arranged symmetrically to the first replacement part 61 when coupled to the housing part 5, and has substantially the same shape and size as the first replacement part 61, so a detailed description thereof will be omitted. Note that the plate part 620, the convex part 621, the inner surface 62a, the outer surface 62b, the lateral protrusions 63, and the second positioning pin 692 of the second replacement part 62 correspond to the plate part 610, the convex part 611, the inner surface 61a, the outer surface 61b, the lateral protrusions 63, and the second positioning pin 692 of the first replacement part 61, respectively.

[0130] 35 and 37 , by making the shapes of the two positioning pins 69 different, it is possible to prevent the capacitor 1 from being oriented incorrectly when attaching it to an external device. That is, the outer diameter of the first positioning pin 691 is smaller than the outer diameter of the second positioning pin 692. The first positioning pin 691 has a protrusion 69a extending in the vertical direction on its outer periphery. The second positioning pin 692 has a hole 69b that opens upward.

[0131] (2.2) Manufacturing Method of Capacitor Next, a manufacturing method of the capacitor 1 according to the second embodiment will be described. The manufacturing method of the capacitor 1 includes a housing step, a filling step, and a curing step. The curing step is the same as the curing step in the first embodiment, so a detailed description thereof will be omitted.

[0132] 22 , in the accommodating step, the capacitor element 2 is accommodated in the exterior body 3. At this time, the capacitor element 2 is positioned in the front-rear direction by the positioning pieces 531 and 541 of the housing part 5.

[0133] In the accommodation step, the housing 5 and the two replacement parts 6 (first replacement part 61 and second replacement part 62) are coupled together. That is, the plate part 610 of the first replacement part 61 is inserted into the first side opening 571 of the housing 5, and the convex part 611 is fitted into the concave part 58. Meanwhile, the plate part 620 of the second replacement part 62 is inserted into the second side opening 572 of the housing 5, and the convex part 621 is fitted into the concave part 58. At this time, the housing 5 and the two replacement parts 6 may be coupled together using an adhesive.

[0134] The timing for coupling the housing part 5 and the replacement part 6 may be before the capacitor element 2 is housed in the housing part 5 or after the capacitor element 2 is housed in the housing part 5 .

[0135] <Filling Step> In the filling step, the exterior body 3 is filled with a liquid curable resin to bury the capacitor element 2 in the liquid curable resin. As a result, when the liquid curable resin is cured to form a cured resin 4, the capacitor element 2 can be sealed by the cured resin 4.

[0136] Preferably, the connection portion 9 between the housing part 5 and the replaceable part 6 is buried in the liquid curable resin within the accommodation space 7. In this way, when the liquid curable resin is cured to form the cured resin 4, the housing part 5 and the replaceable part 6 can be bonded together by the cured resin 4.

[0137] Here, in the first embodiment, all of the bonding locations 9 are embedded in the cured resin 4 (see FIG. 3 ), but in the second embodiment, some (upper portions) of the bonding locations 9, which are generally U-shaped in side view, are located above the exposed surface 40, and the remaining portions are embedded in the cured resin 4. In this way, even if all of the bonding locations 9 are not embedded in the cured resin 4, as long as the cured resin 4 is in contact with the casing 5 and the two replaceable parts 6 via some of the bonding locations 9, the cured resin 4 can bond the casing 5 and the two replaceable parts 6 together.

[0138] When the curing process is completed, a capacitor 1 as shown in Fig. 23 is obtained. This capacitor 1 is a capacitor 1 in which two colored replacement parts 6 are used.

[0139] (2.3) Effects The second embodiment has the same effects as the first embodiment. That is, in the second embodiment, the exterior body 3 includes a housing 5 and two replaceable parts 6 selected from multiple types of replaceable parts 6. Therefore, when the specifications of the replaceable parts 6 are changed even if the specifications of the housing 5 are not changed, the capacitor 1 can be manufactured simply by replacing the pre-change replaceable part 6 (e.g., a collar-type replaceable part 6) with the changed replaceable part 6 (e.g., a nut-type replaceable part 6).

[0140] Moreover, in the second embodiment, since the exterior body 3 includes two replaceable parts 6, for example, the first replaceable part 61 can be a collar specification and the second replaceable part 62 can be a positioning pin specification. In other words, the capacitor 1 can be manufactured not only by using two replaceable parts 6 of the same type of specification, but also by using two replaceable parts 6 of different types of specification.

[0141] 3. Modifications In the first and second embodiments, four types of replacement parts 6 are prepared, but two or three types, or five or more types of replacement parts 6 may be prepared.

[0142] In the first embodiment, one replacement part 6 is used to manufacture one capacitor 1, and in the second embodiment, two replacement parts 6 are used, but three or more replacement parts 6 may also be used.

[0143] When two or more refills 6 are used to manufacture one capacitor 1, these refills 6 may be of the same type or different types.

[0144] In the first and second embodiments, the replaceable part 6 included in the exterior body 3 is in contact with the cured resin 4 , but the replaceable part 6 does not have to be in contact with the cured resin 4 .

[0145] In the second embodiment, the second side opening 572 has the same shape and size as the first side opening 571, but they do not have to have the same shape and size.

[0146] In the second embodiment, the position of the second side opening 572 coincides with the position of the first side opening 571 in a side view, but they do not have to coincide.

[0147] 4. Aspects As is clear from the above-described embodiments and modifications, the present disclosure includes the following aspects. In the following, reference numerals are given in parentheses only to clarify the correspondence with the embodiments.

[0148] The first aspect is a capacitor (1) comprising a capacitor element (2), an exterior body (3) that houses the capacitor element (2), and a cured resin (4) that is filled in the exterior body (3) and seals the capacitor element (2). The exterior body (3) includes a housing part (5) having a housing space (7) that houses the capacitor element (2), and an attachment part (30) that is attachable to an external device and is connected to the housing part (5). Within the housing space (7), at least a portion of the connection point between the housing part (5) and the attachment part (30) is buried in the cured resin (4).

[0149] According to this aspect, there is no need to prepare a mold for manufacturing the entire exterior body (3) every time there is a change in specifications. The cured resin (4) makes it difficult for the attachment portion (30) to come off the housing portion (5).

[0150] A second aspect is a capacitor (1) based on the first aspect. In the second aspect, the mounting portion (30) has a protrusion (31) and / or a recess (32). At least a portion of the protrusion (31) and / or the recess (32) is embedded in the cured resin (4).

[0151] According to this embodiment, the protrusion (31) bites into the cured resin (4) and the cured resin (4) bites into the recess (32), thereby providing an anchor effect and making it even more difficult for the mounting part (30) to come off the housing part (5).

[0152] A third aspect is a capacitor (1) based on the first or second aspect. In the third aspect, the housing (5) further has a first fitting portion (91). The mounting portion (30) has a second fitting portion (92) that fits into the first fitting portion (91). The first fitting portion (91) and the second fitting portion (92) fit together at a joining location.

[0153] According to this aspect, the fitting of the first fitting portion (91) and the second fitting portion (92) makes it even more difficult for the attachment portion (30) to come off the housing portion (5).

[0154] A fourth aspect is a capacitor (1) comprising a capacitor element (2), an exterior body (3) that houses the capacitor element (2), and a cured resin (4) that is filled in the exterior body (3) and seals the capacitor element (2). The exterior body (3) includes a housing part (5) having a housing space (7) that houses the capacitor element (2), and at least one replacement part (6) selected from a plurality of types of replacement parts (6) that can be coupled to the housing part (5) and attached to an external device.

[0155] According to this aspect, there is no need to prepare a mold for manufacturing the entire exterior body (3) every time the specifications are changed.

[0156] A fifth aspect is a capacitor (1) based on the fourth aspect. In the fifth aspect, the cured resin (4) bonds the housing part (5) and at least one replaceable part (6).

[0157] According to this aspect, the cured resin (4) makes it difficult for at least one replacement part (6) to come off from the housing part (5).

[0158] A sixth aspect is a method for manufacturing a capacitor (1), comprising: a housing step of housing a capacitor element (2) in an exterior body (3), a filling step of filling the exterior body (3) with a liquid curable resin to immerse the capacitor element (2) in the liquid curable resin, and a curing step of curing the liquid curable resin. The exterior body (3) comprises a housing part (5) having a housing space (7) for housing the capacitor element (2), and at least one replacement part (6) selected from a plurality of types of replacement parts (6) that can be coupled to the housing part (5) and attached to an external device.

[0159] According to this aspect, there is no need to prepare a mold for manufacturing the entire exterior body (3) every time the specifications are changed.

[0160] A seventh aspect is a method for manufacturing the capacitor (1) based on the sixth aspect. In the seventh aspect, in the curing step, the liquid curable resin is cured while being in contact with the housing part (5) and at least one replaceable part (6).

[0161] According to this aspect, the casing (5) and at least one replacement part (6) can be fixed together by the cured resin (4).

[0162] An eighth aspect is a method for manufacturing a capacitor (1) based on the sixth or seventh aspect. In the eighth aspect, the housing part (5) and the at least one replacement part (6) each have a surface facing the storage space (7).

[0163] According to this aspect, the liquid hardening resin poured into the storage space (7) is more likely to come into contact with the housing part (5) and at least one replacement part (6).

[0164] A ninth aspect is a method for manufacturing a capacitor (1) based on any one of the sixth to eighth aspects. In the ninth aspect, in the filling step, a connection point (9) between the housing part (5) and at least one replaceable part (6) in the accommodation space (7) is buried in a liquid hardening resin.

[0165] According to this embodiment, the cured resin (4) makes it easier to fix the housing (5) and at least one replacement part (6).

[0166] REFERENCE SIGNS LIST 1 capacitor 2 capacitor element 3 exterior body 30 mounting portion 31 protrusion 32 recess 4 cured resin 5 housing 6 replacement portion 7 storage space 91 first fitting portion 92 second fitting portion

Claims

1. A capacitor comprising: a capacitor element; an exterior body that houses the capacitor element; and a cured resin that is filled in the exterior body and seals the capacitor element, wherein the exterior body includes a housing portion that has a housing space for housing the capacitor element, and an attachment portion that can be attached to an external device and is coupled to the housing portion, and at least a part of a coupling location between the housing portion and the attachment portion in the housing space is buried in the cured resin.

2. The capacitor according to claim 1, wherein the attachment portion has a protrusion and / or a recess, and at least a part of the protrusion and / or the recess is buried in the cured resin.

3. The capacitor according to claim 1, wherein the housing portion further has a first fitting portion, the attachment portion has a second fitting portion that fits into the first fitting portion, and at the coupling location, the first fitting portion and the second fitting portion are fitted together.

4. A capacitor comprising: a capacitor element; an exterior body that houses the capacitor element; and a cured resin that is filled in the exterior body and seals the capacitor element, wherein the exterior body includes a housing portion that has a housing space for housing the capacitor element, and at least one replacement portion selected from a plurality of types of replacement portions that can be coupled to the housing portion and can be attached to an external device.

5. The capacitor according to claim 4, wherein the cured resin adheres the housing portion and the at least one replacement portion.

6. A method for manufacturing a capacitor, comprising: a housing step of housing a capacitor element in an exterior body; a filling step of filling the exterior body with a liquid curable resin to immerse the capacitor element in the liquid curable resin; and a curing step of curing the liquid curable resin, wherein the exterior body includes a housing portion that has a housing space for housing the capacitor element, and at least one replacement portion selected from a plurality of types of replacement portions that can be coupled to the housing portion and can be attached to an external device.

7. The method for manufacturing a capacitor according to claim 6, wherein in the curing step, the liquid curable resin is cured in a state where the liquid curable resin is in contact with the housing portion and the at least one replacement portion.

8. The manufacturing method of the capacitor according to claim 6, wherein each of the housing portion and the at least one replaceable portion has a surface facing the accommodation space.

9. The manufacturing method of the capacitor according to claim 6, wherein in the filling step, a joint portion between the housing portion and the at least one replaceable portion in the accommodation space is buried in the liquid curable resin.

Images