WO2022176401A1

WO2022176401A1 - Capacitors, capacitor module, and method for manufacturing capacitor module

Info

Publication number: WO2022176401A1
Application number: PCT/JP2021/048518
Authority: WO
Inventors: 宏樹竹岡; 康行平垣
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2021-02-19
Filing date: 2021-12-27
Publication date: 2022-08-25
Also published as: CN116830223A; JPWO2022176401A1

Abstract

Provided are capacitors that can reduce switching loss, etc. in the manufacturing process and can improve productivity. The capacitors (first capacitor, second capacitor) each comprise: a capacitor element having an electrode; a busbar connected to the electrode; a holding member (first holding member, second holding member) that holds the busbar; and an outer package body that covers the entire capacitor element and a portion of the busbar and holding member. The holding members are provided with connection portions (first connection portion, second connection portion) that are exposed from the outer packaging and connect to the holding member of the other capacitor.

Description

CAPACITOR, CAPACITOR MODULE, AND CAPACITOR MODULE MANUFACTURING METHOD

The present invention relates to a capacitor, a capacitor module, and a method for manufacturing a capacitor module.

A case mold type capacitor in which a bus bar is connected to each electrode provided on both end surfaces of a capacitor element, the capacitor element to which the bus bar is connected is housed in a case, and the case is filled with filling resin. is known (see, for example, Patent Document 1). Moisture-proofing of the capacitor element is achieved by covering it with the case and the filling resin.

Conventionally, in such capacitors, the number of capacitor elements, the shape of the busbar, the shape of the case, etc. are designed and manufactured according to the required specifications for each product.

That is, a capacitor element unit is created by arranging a number of capacitor elements determined by design and connecting bus bars having a shape corresponding to the number to all the capacitor elements. After that, the capacitor element unit is accommodated in a case having a shape, size, etc. corresponding to the capacitor element unit, and a filling resin in a liquid state is injected into the case. After that, the filling resin is cured to cover the capacitor element unit with the filling resin and the case.

JP 2015-103777 A

With conventional capacitors, the parts and manufacturing process differ greatly for each product, so switching losses in the manufacturing process and the time and effort required to prepare and manage the jigs used in manufacturing tend to increase.

Therefore, an object of the present invention is to provide a capacitor, a capacitor module, and a method of manufacturing a capacitor module that can reduce switching loss in the manufacturing process and improve productivity.

A first aspect of the present invention relates to a capacitor. A capacitor according to this aspect includes a capacitor element having electrodes, a bus bar connected to the electrodes, a holding member holding the bus bar, the entire capacitor element, and a part of the bus bar and the holding member. and an exterior body for covering. Here, the holding member is provided with a connecting portion exposed from the exterior body and connected to the holding member of the other capacitor.

A second aspect of the present invention relates to a capacitor module. A capacitor module according to this aspect is configured by connecting a plurality of capacitors according to the first aspect.

A third aspect of the present invention relates to a method for manufacturing a capacitor module. In the manufacturing method according to this aspect, the capacitor element unit formed by connecting the bus bar held by the holding member having the connecting portion to the electrode of the capacitor element is accommodated in the mold member, and the liquid phase resin is The entire capacitor element is immersed in the resin, the resin is injected into the mold member so that the connecting portion is exposed, the injected resin is cured, and the cured resin serves as the exterior body of the capacitor. A capacitor covering the element unit with the connecting portion exposed is prepared, and a plurality of the capacitors are connected by the connecting portion.

According to the present invention, switching losses in the manufacturing process can be reduced, and productivity can be improved.

The effects and significance of the present invention will become clearer from the description of the embodiments shown below. However, the embodiment shown below is merely an example of carrying out the present invention, and the present invention is not limited to the embodiments described below.

1 is a perspective view of a capacitor module according to an embodiment; FIG. 2(a) and 2(b) are a perspective view and an exploded perspective view, respectively, of a first capacitor element unit constituting a first capacitor according to the embodiment. FIG. 3(a) is a plan view of a first holding member holding a pair of busbars according to the embodiment, and FIGS. They are -A' sectional drawing and BB' sectional drawing. FIGS. 4A and 4B are a perspective view and an exploded perspective view, respectively, of a second capacitor element unit forming a second capacitor according to the embodiment. FIG. 5 is a diagram for explaining the method of manufacturing the capacitor module according to the embodiment. FIGS. 6A and 6B are diagrams for explaining the method of manufacturing the capacitor module according to the embodiment. FIG. 7 is a perspective view of a capacitor module according to a modification. FIG. 8 is a diagram showing a configuration for holding a pair of bus bars on a first holding member according to a modification. FIGS. 9A and 9B are plan views of a first holding member and a second holding member, respectively, in which busbars are held, according to a modification. FIGS. 10(a) and 10(b) are plan views of capacitor modules according to modifications. FIG. 11 is a diagram for explaining configurations of a first connecting portion and a second connecting portion according to a modification. FIG. 12(a) is a plan view of a fixing portion provided with a connecting portion according to a modification, and FIG. 12(b) is a plan view of a second holding member holding a busbar according to a modification. is.

Embodiments of the present invention will be described below with reference to the drawings. For convenience, front-rear, left-right, and up-down directions are indicated in each figure as appropriate. It should be noted that the illustrated directions only indicate relative directions of the capacitor modules, and do not indicate absolute directions. Also, for convenience of explanation, some configurations such as “bottom portion” and “front side portion” may be named according to the direction of illustration.

FIG. 1 is a perspective view of the capacitor module 1. FIG. 2(a) and 2(b) are a perspective view and an exploded perspective view, respectively, of a first capacitor element unit C1 that constitutes the first capacitor 10A. FIG. 3(a) is a plan view of the first holding member 300A holding a pair of busbars 200, and FIGS. 3(b) and 3(b) are AA' cross sections of FIG. 3(a), respectively. 1 and a BB' sectional view. 4A and 4B are a perspective view and an exploded perspective view, respectively, of a second capacitor element unit C2 that constitutes the second capacitor 10B.

Referring to FIG. 1, capacitor module 1 includes a plurality of, for example, two first capacitors 10A and two second capacitors 10B. A plurality of first capacitors 10A are connected in the horizontal direction, and the second capacitors 10B are connected to the first capacitors 10A at the left and right ends. The two second capacitors 10B on the left and right are oriented in opposite directions. The number of first capacitors 10A is determined according to required specifications such as capacitance. For this reason, depending on the required specifications, the capacitor module 1 may be configured to have only two second capacitors 10B without the first capacitor 10A.

1 to 3(c), the first capacitor 10A includes a capacitor element 100, a pair of busbars 200, a first holding member 300A, and an exterior body 400. A first capacitor element unit C1 is configured by capacitor element 100, a pair of bus bars 200, and first holding member 300A.

Capacitor element 100 is formed by stacking two metallized films in which aluminum is vapor-deposited on a dielectric film, winding or laminating the stacked metallized films, and pressing them into a flat shape. Capacitor element 100 is formed in a shape similar to a flattened cylinder, and has a pair of end surfaces 101 and a peripheral surface 102 . Electrodes 110 are formed on both end surfaces 101 of the capacitor element 100 by spraying a metal such as zinc.

Note that the capacitor element 100 of the present embodiment is formed of a metallized film in which aluminum is vapor-deposited on a dielectric film. It may be formed by a film. Alternatively, capacitor element 100 may be formed of a metallized film obtained by vapor-depositing a plurality of these metals, or may be formed of a metallized film obtained by vapor-depositing an alloy of these metals. .

The pair of bus bars 200 are formed into a predetermined shape by appropriately cutting and bending a conductive material plate, for example, a copper plate. Each bus bar 200 has an electrode terminal portion 210 having a rectangular plate shape extending in the horizontal direction, a connection terminal portion 220 having a rectangular plate shape extending in the vertical direction, and a rectangular plate shape extending in the front-rear direction. It is composed of a relay portion 230 that connects the terminal portion 210 and the connection terminal portion 220 .

Each bus bar 200 is a terminal member electrically connected to each electrode 110, and its electrode terminal portion 210 is joined to each electrode 110 of the capacitor element 100 by a joining method such as soldering.

The first holding member 300A is made of a thermoplastic resin such as polyphenylene sulfide (PPS), and includes a body portion 310, a first connecting portion 320, and a second connecting portion 330.

The body part 310 has a rectangular plate shape. A rectangular opening 311 is formed at four corners of the main body 310 . As shown in FIG. 3B, the four openings 311 have tapered inner wall surfaces on the front, rear, right, and left sides, and the diameters of the openings 311 are tapered from the lower surface side to the upper surface side of the main body 310, that is, upward (condenser). direction away from the element 100).

The first connecting portion 320 and the second connecting portion 330 are formed to rise from the left and right ends, which are the opposite ends of the body portion 310, respectively. The first connecting portion 320 has a concave portion 321 on the front side of the upper end, and an engaging piece 322 projecting leftward is formed. It is formed. The second connecting portion 330 has a concave portion 331 on the rear side of the upper end, and an engaging piece 332 projecting to the right is formed. It is formed. The engagement piece 322 and the engagement projection 323 of the first connection portion 320 and the engagement piece 332 and the engagement projection 333 of the second connection portion 330 have the same configuration, and the two

recesses

321 and 331 It has a shape corresponding to the engaging

protrusions

323 and 333 .

The first holding member 300</b>A is arranged above and close to the capacitor element 100 so as to face the peripheral surface 102 of the capacitor element 100 and holds the pair of bus bars 200 . That is, as shown in FIG. 3(c), the pair of bus bars 200 are insert-molded into the first holding member 300A so that the root portions of the connection terminal portions 220 are embedded in the main body portion 310, and are vertically, forwardly, horizontally and horizontally held immovable in any direction. A connection terminal portion 220 protrudes upward from the body portion 310 . By holding the pair of bus bars 200 on the first holding member 300A in this manner, good dimensional accuracy between the two connection terminal portions 220 is ensured.

The exterior body 400 is made of thermosetting resin such as epoxy resin, and has a rectangular parallelepiped shape. The exterior body 400 covers the entire capacitor element 100 and a portion of the pair of bus bars 200 and the first holding member 300A. Connection terminal portions 220 of a pair of bus bars 200 and first connecting portion 320 and second connecting portion 330 of first holding member 300A are exposed to the outside from upper surface 400a, which is one surface of exterior body 400. As shown in FIG.

1, 4(a) and 4(b), the second capacitor 10B includes a capacitor element 100, a pair of busbars 200, and an exterior body 400, like the first capacitor 10A. Furthermore, the second capacitor 10B includes a second holding member 300B instead of the first holding member 300A. A second capacitor element unit C2 is configured by capacitor element 100, a pair of bus bars 200, and a second holding member 300B.

Like the first holding member 300A, the second holding member 300B is arranged above and close to the capacitor element 100 so as to face the peripheral surface 102 of the capacitor element 100, and holds the pair of busbars 200.

The second holding member 300B includes a body portion 310 and a first connecting portion 320, like the first holding member 300A. Further, the second holding member 300B includes a fixing portion 340 instead of the second connecting portion 330. As shown in FIG.

The fixed part 340 has a semi-oval plate shape. A circular hole 341 is formed in the fixed part 340 . A metal collar 342 is embedded in the hole 341 for reinforcement.

In the second capacitor 10B, the connection terminal portions 220 of the pair of busbars 200 and the first connecting portion 320 of the second holding member 300B are exposed to the outside from the upper surface 400a of the exterior body 400, and the second holding member 300B is fixed. The portion 340 is exposed from the side surface 400 b of the exterior body 400 .

As shown in FIG. 1, in the second holding member 300B of the second capacitor 10B on the left side facing in the front-rear direction, the first connecting portion 320 has the same configuration as the second connecting portion 330, and the second connecting portion 330 function as

By connecting the first connecting portion 320 of one first capacitor 10A and the second connecting portion 330 of the other first capacitor 10A, a plurality of (two in FIG. 1) first capacitors 10A are The connection terminal portions 220 of the pair of bus bars 200 are connected in the left-right direction, that is, in the direction parallel to the upper surface 400a of the exterior body 400 where the connection terminal portions 220 are exposed. At this time, the engaging projection 323 of the first connecting portion 320 is fitted into the concave portion 331 of the engaging piece 332 of the second connecting portion 330 so that the engaging projection 323 and the engaging piece 332 are engaged with each other. The engaging projection 333 of the second connecting portion 330 is fitted into the recess 321 of the engaging piece 322 of the first connecting portion 320 to engage the engaging projection 333 and the engaging piece 322 . As a result, the movement of the plurality of first capacitors 10A in the up-down direction and in the front-rear direction is restricted. The vertical, front-rear, and left-right positions between the first capacitors 10A are determined.

Similarly, by connecting the second connecting portion 330 of the first capacitor 10A on the right end to the first connecting portion 320 of the second capacitor 10B on the right side, the first capacitor 10A and the second capacitor 10B are arranged in the horizontal direction. concatenated. Further, by connecting the first connecting portion 320 of the first capacitor 10A on the left end and the first connecting portion 320 (functioning as the second connecting portion 330) of the second capacitor 10B on the left side, the first capacitor 10A and the A second capacitor 10B is connected in the horizontal direction. The vertical, front-rear, and horizontal positions between the first capacitor 10A and the second capacitor 10B are determined.

The plurality of first capacitors 10A and the two second capacitors 10B are fixed by an adhesive between the first connecting portion 320 and the second connecting portion 330, and are connected together to form an exterior body. A banding band 500 is wrapped around the side surface (peripheral surface) of 400 to fix. The method of fixing the first capacitor 10A and the second capacitor 10B is not limited to the above method. For example, the binding band 500 is not used, and the first connecting portion 320 and the second connecting portion 330 are fixed with an adhesive, and the side surfaces of the two adjacent exterior bodies 400 are fixed with an adhesive. Alternatively, a method of fixing only by the binding band 500 without using an adhesive may be adopted. Further, for example, instead of binding band 500, an adhesive tape may be wound around the side surface (peripheral surface) of exterior body 400 which is a lump.

5, 6(a) and 6(b) are diagrams for explaining the manufacturing method of the capacitor module 1. FIG. FIG. 5 is a flow chart showing the flow of the capacitor module manufacturing process, and FIGS. 6A and 6B are diagrams for explaining the flow of the exterior body forming process.

The manufacturing process of the capacitor module 1 includes a capacitor manufacturing process and a module assembling process. In the capacitor manufacturing process, the first capacitor 10A and the second capacitor 10B are created. In the module assembly process, capacitor module 1 is assembled by connecting a plurality of first capacitors 10A and second capacitors 10B produced in the capacitor manufacturing process.

The capacitor manufacturing process consists of an element unit forming process and an exterior body forming process. First, an element unit forming step is performed. A pair of bus bars 200 held by first holding member 300A are connected to both electrodes 110 of capacitor element 100 to form first capacitor element unit C1. A pair of bus bars 200 held by second holding member 300B are connected to both electrodes 110 of capacitor element 100 to form second capacitor element unit C2.

Next, the exterior body forming process is performed. A casting container 2A for the first capacitor 10A and a casting container 2B for the second capacitor 10B are used as mold members in the exterior body forming step. The

casting containers

2A and 2B are made of metal and have a substantially rectangular parallelepiped box shape with an open top corresponding to the shape of the exterior body 400 . A concave portion 21 corresponding to the fixing portion 340 of the second holding member 300B is formed in the upper end portion of the casting container 2B.

As shown in FIG. 6(a), the first capacitor element unit C1 is accommodated in the casting container 2A. At this time, the first connecting portion 320 and the second connecting portion 330 are fixed by a fixing jig (not shown), and the first capacitor element unit C1 is positioned with respect to the casting container 2A. Next, a liquid-phase thermosetting resin such as an epoxy resin is poured into the casting container 2A. Capacitor element 100, electrode terminal portions 210 and relay portions 230 of a pair of busbars 200, and main body portion 310 of first holding member 300A are immersed in thermosetting resin in liquid phase. After that, the thermosetting resin in the casting container 2A is heated. As a result, the thermosetting resin is cured to form the exterior body 400, and the exterior body 400 covers the first capacitor element unit C1 to form the first capacitor 10A. The first connecting portion 320 , the second connecting portion 330 and the two connection terminal portions 220 are exposed to the outside from the exterior body 400 .

Similarly, as shown in FIG. 6(b), the second capacitor element unit C2 is accommodated in the casting container 2B. At this time, the first connecting portion 320 is fixed by a fixing jig (not shown), and the base end portion of the fixing portion 340 is fitted into the concave portion 21, thereby positioning the second capacitor element unit C2 with respect to the casting container 2B. be. The fixing part 340 is protruded outside the casting container 2B. The concave portion 21 is closed with the sealing member 22 after the fixing portion 340 is inserted. A thermosetting resin in a liquid phase state is injected into the casting container 2B and heated. As a result, the thermosetting resin is cured to form the exterior body 400, and the exterior body 400 covers the second capacitor element unit C2 to form the second capacitor 10B. The first connecting portion 320 , the fixing portion 340 and the two connection terminal portions 220 are exposed from the exterior body 400 .

Four openings 311 are formed in the body portion 310 of the first holding member 300A and the second holding member 300B, and the liquid-phase thermosetting resin is injected into the

casting containers

2A and 2B. The liquid flows through these openings 311 when the liquid is supplied. As a result, the thermosetting resin can be easily distributed in the

casting containers

2A and 2B, and the exterior body 400 can be molded smoothly.

Next, the module assembly process is performed. A plurality of first capacitors 10</b>A and two left and right second capacitors 10</b>B are connected by a first connecting portion 320 and a second connecting portion 330 and fixed with an adhesive or a binding band 500 .

In this way, the capacitor module 1 is completed as shown in FIG.

The capacitor module 1 can be mounted on an external device, for example, an inverter device for driving an electric motor in an electric vehicle. The capacitor module 1 is fixed to the external device by screwing the left and right fixing portions 340 of the second capacitor 10B using the holes 341 . A pair of external busbars from an external device are connected to connection terminal portions 220 of a pair of busbars 200 of the plurality of first capacitors 10A and second capacitors 10B.

<Effect of Embodiment>
As described above, according to the present embodiment, the following effects can be obtained.

The capacitor (first capacitor 10A, second capacitor 10B) includes capacitor element 100 having electrode 110, bus bar 200 connected to electrode 110, and holding members (first holding member 300A, second holding member 300A, second holding member) holding bus bar 200. member 300B), and an exterior body 400 that covers the entire capacitor element 100, bus bar 200, and part of the holding member. The holding member is provided with connecting portions (first connecting portion 320, second connecting portion 330) exposed from the exterior body 400 and connected to the holding members of other capacitors.

The capacitor module 1 is configured by connecting a plurality of capacitors (first capacitor 10A, second capacitor 10B) having the above configuration.

According to the capacitors (first capacitor 10A, second capacitor 10B) and capacitor module 1 of the present embodiment, a plurality of capacitors are connected using their connection portions (first connection portion 320, second connection portion 330). By connecting them, a capacitor module 1 having a number of capacitor elements 100 corresponding to required specifications can be produced. As a result, since a common capacitor can be used for capacitor modules 1 having different numbers of capacitor elements 100, parts and manufacturing processes related to capacitors can be shared, and productivity can be improved. In addition, by improving productivity, it may be possible to reduce product costs.

Moreover, the connecting portions (first connecting portion 320, second connecting portion 330) hold the pair of bus bars 200 of the adjacent capacitors (first capacitor 10A, second capacitor 10B) in the holding member (first holding member 300A). , and second holding members 300B) are connected to each other, the dimensional accuracy between the bus bars 200 of adjacent capacitors in the capacitor module 1 is improved.

Furthermore, in the capacitors (first capacitor 10A, second capacitor 10B), capacitor element 100 has a pair of end faces 101 and peripheral face 102, electrodes 110 are formed on each end face 101, and busbars 200 are formed on each end face 101. , and the holding members (the first holding member 300A and the second holding member 300B) are arranged so as to face the peripheral surface 102 .

According to this configuration, since the holding members (the first holding member 300A and the second holding member 300B) are positioned between the two electrodes 110, the two bus bars 200 extending from the two electrodes 110 can be easily held by the holding members. .

Furthermore, in the capacitors (first capacitor 10A, second capacitor 10B), the exterior body 400 has a rectangular parallelepiped shape, and the busbar 200 is partially exposed from one surface (upper surface 400a) of the exterior body 400. , and has a connection terminal portion 220 to which an external terminal is connected to the outside of the exterior body 400, and the connection portion (first connection portion 320, second connection portion 330) is connected to another capacitor in a direction parallel to the one surface. It is configured to be connected.

According to this configuration, in the capacitor module 1, the connection terminal portions 220 of the capacitors (the first capacitor 10A and the second capacitor 10B) are arranged on the same plane, so that external terminals can be easily connected to the connection terminal portions 220.

Furthermore, the capacitors (first capacitor 10A, second capacitor 10B) have holding members (first holding member 300A, second holding member 300B) made of a resin material, capacitor element 100 having a pair of end surfaces 101, An electrode 110 is formed on each end surface 101 and a bus bar 200 is provided for each electrode 110 and is configured to be insert molded into the holding member.

According to this configuration, in the capacitor (first capacitor 10A, second capacitor 10B), the dimensional accuracy between the two bus bars 200 held by the holding members (first holding member 300A, second holding member 300B) is enhanced. be able to.

Furthermore, the capacitors (first capacitor 10A, second capacitor 10B) are formed in the holding members (first holding member 300A, second holding member 300B) with openings passing through the holding members in the direction in which the holding members and capacitor element 100 are arranged. 311 is provided.

With this configuration, it is possible to increase the contact area between the holding members (first holding member 300A, second holding member 300B) and the surfaces of the exterior body 400 along the arranging direction. and the exterior body 400 becomes stronger. As a result, even if a large force is applied to the holding member through the connecting portions (first connecting portion 320, second connecting portion 330) in the above-described alignment direction, particularly in the direction in which the holding member separates from capacitor element 100, exterior body 400 is damaged. etc. is unlikely to occur.

Furthermore, the capacitors (the first capacitor 10A and the second capacitor 10B) are configured such that the inner wall surface of the opening 311 is tapered such that the diameter of the opening 311 increases in the direction away from the capacitor element 100. ing.

According to this configuration, since the anchoring effect is generated by the resin that has entered the opening 311, when a large force is applied to the holding members (the first holding member 300A and the second holding member 300B) in the separating direction, Furthermore, damage to the exterior body 400 is much less likely to occur.

Furthermore, the capacitor (second capacitor 10B) is configured such that the holding member (second holding member 300B) is provided with a fixing portion 340 that can be fixed to an external device.

According to this configuration, the fixing portion 340 can be used to fix the capacitor module 1 to an external device. Moreover, since fixing portion 340 is provided on the holding member (second holding member 300B) that holds busbar 200, the positional accuracy of busbar 200 with reference to fixing portion 340 can be enhanced.

Further, in capacitor module 1, bus bar 200 held by holding members (first holding member 300A, second holding member 300B) having connecting portions (first connecting portion 320, second connecting portion 330) is connected to capacitor element 100. Capacitor element units C1 and C2 formed by being connected to electrodes 110 are housed in mold members (casting

containers

2A and 2B), and liquid-phase resin (thermosetting resin) is applied to the resin to form a capacitor. The entire element 100 is immersed, and the resin is injected into the molding member so that the connecting portions are exposed, and the injected resin is cured. It is manufactured by forming capacitors (first capacitor 10A, second capacitor 10B) to be covered in an exposed state and connecting a plurality of capacitors by connecting portions.

According to this manufacturing method, since a common capacitor can be used for capacitor modules 1 having different numbers of capacitor elements 100, it is possible to share parts and manufacturing processes related to capacitors, thereby improving productivity. . In addition, by improving productivity, it may be possible to reduce product costs.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the application examples of the present invention may be modified in various ways other than the above-described embodiments. It is possible.

For example, in the above-described embodiment, the capacitors (first capacitor 10A, capacitor 10B) are arranged such that the entire body portion 310 of the holding member (first holding member 300A, second holding member 300B) is embedded inside the exterior body 400. It was configured as However, as shown in FIG. 7, the

capacitors

10A and 10B may be configured such that a part of the main body portion 310 of the holding

members

300A and 300B, that is, the upper side, is exposed from the exterior body 400. FIG. In the case of the above configuration, the contact area between the holding

members

300A and 300B and the exterior body 400 is increased by the openings 311 formed in the main body 310, and the taper of the openings 311 provides an anchoring effect. Damage to the

capacitors

10A and 10B such that the

members

300A and 300B are separated from the upper end portion of the package 400 is prevented.

Further, in the above-described embodiment, the pair of bus bars 200 are held by the holding

members

300A and 300B by being insert-molded into the main body portion 310 of the holding members (the first holding member 300A and the second holding member 300B). . However, the configuration for holding the pair of busbars 200 on holding

members

300A and 300B is not limited to insert molding. For example, a pair of busbars 200 may be attached to holding

members

300A and 300B with a predetermined attachment structure.

FIG. 8 is a diagram showing a configuration for holding the pair of busbars 200 on the first holding member 300A according to the modification. A circular hole 231 is formed in the relay portion 230 of the pair of busbars 200 . Two slit-shaped holes 312 corresponding to the connection terminal portions 220 of the pair of bus bars are formed in the body portion 310 of the first holding member 300A. Circular protrusions 313 corresponding to the holes 231 of the pair of busbars 200 are formed on the body portion 310 . The connection terminal portions 220 of the pair of busbars 200 are passed through the holes 312 from the lower surface side of the main body portion 310 . Furthermore, the protrusions 313 of the main body portion 310 are fitted into the holes 231 of the pair of busbars 200 . As a result, the pair of busbars 200 are held by the first holding member 300A. The second holding member 300B also has the same configuration as the first holding member 300A.

Furthermore, in the above-described embodiment, in the first capacitor 10A, one set of the two opposing ends (left and right ends, front and rear ends) of the first holding member 300A A first connecting portion 320 and a second connecting portion 330 are provided at the portions (left and right ends). In the second capacitor 10B, the first connecting portion 320 is provided at the end (left end) opposite to the end (right end) where the fixing portion 340 is provided.

However, as shown in FIG. 9(a), in the first capacitor 10A, even if the first connecting portion 320 and the second connecting portion 330 are provided at the two sets of opposing ends of the first holding member 300A, good. Also, as shown in FIG. 9B, in the second capacitor 10B, two ends (front and rear ends) that do not face the end (right end) where the fixing portion 340 of the second holding member 300B is provided A first connection part 320 and a second connection part 330 may be provided in the . In this case, for example, by connecting the first capacitor 10A and the second capacitor 10B in the front-rear direction as shown in FIG. , the capacitor module 1 having the connecting terminal portions 220 in different directions can be produced. Also, as shown in FIG. 10B, by connecting the first capacitor 10A and the second capacitor 10B in the front-rear direction and the left-right direction, the capacitor module 1 in which the

capacitors

10A and 10B are arranged in multiple rows can be produced. In this manner, a capacitor module 1 having different arrangements of the

capacitors

10A and 10B can be produced according to required specifications.

Furthermore, the configurations of the first connecting portion 320 and the second connecting portion 330 are not limited to the configurations of the above embodiments, and may be of any configuration. For example, as shown in FIG. 11, the first connecting portion 320 includes a flange portion 326 having a plurality (two) of protrusions 325, and the second connecting portion 330 includes a flange portion 326 having a plurality (two) of holes 335. It can be configured to include the portion 336 . In this configuration, the first connecting portion 320 and the second connecting portion 330 are connected by overlapping the two

flange portions

326 , 336 such that the protrusion 325 is inserted into the hole 335 . By applying heat to the protrusion 325 and pressing the protrusion 325 toward the hole 335, the first connecting portion 320 and the second connecting portion 330 are fixed not only in the front, rear, left, and right directions but also in the vertical direction. can be

Furthermore, in the above embodiment, the fixing portion 340 is integrally formed with the main body portion 310 of the second holding member 300B. However, the fixing part 340 may be formed separately from the body part 310 of the second holding member 300B and coupled to the body part 310 . For example, as shown in FIG. 12( a ), a connecting portion 345 is provided on the fixed portion 340 . The connecting portion 345 has the same configuration as the first connecting portion 320 and includes an engaging piece 347 having a concave portion 346 and an engaging protrusion 348 . As shown in FIG. 12(b), the connecting portion 345 of the fixing portion 340 is connected to the second connecting portion 330 of the first holding member 300A and is fixed with an adhesive or the like, whereby the fixing portion 340 is integrated. A second holding member 300B is configured.

The timing at which the fixing portion 340 is attached to the first holding member 300A to form the second holding member 300B may be any timing (process) in the process of manufacturing the capacitor module 1. For example, the formation timing may be before the capacitor manufacturing process of FIG. 5, at the end of the element unit forming process in the capacitor manufacturing process, or after the exterior body forming process in the capacitor manufacturing process. Alternatively, it may be at the end of the module assembly process of FIG.

The configuration of FIG. 12(a) may be applied to the second holding member 300B shown in FIG. 9(b). In this case, the fixed portion 340 may be connected to either of the two second connecting portions 330 provided on the first holding member 300A according to the specifications of the capacitor module 1 .

Furthermore, in the above-described embodiment, openings 311 are provided at four corners of main body 310 of the holding members (first holding member 300A and second holding member 300B). However, the number, position, size and shape of the openings provided in main body 310 may be arbitrary. Furthermore, the body portion 310 may not have an opening.

Furthermore, in the above embodiment, the inner wall surface of the opening 311 is tapered, but the taper may not be provided.

Furthermore, in the above embodiment, the capacitor module 1 is composed of a plurality of first capacitors 10A and second capacitors 10B. However, if the fixing portion 340 is not required when attaching to an external device, the capacitor module 1 may be configured only with a plurality of first capacitors 10A.

Furthermore, in the above embodiment, the second holding member 300B is provided with one fixing portion 340 at the right end portion of the main body portion 310 . However, the position and the number of fixing portions 340 may be changed as appropriate. Also, the shape of the fixing portion 340 may be any shape as long as it can be fixed to an external device.

Furthermore, in the above embodiment, one connection terminal portion 220 is provided on the bus bar 200 . The number of connection terminal portions 220 may be changed as appropriate. Further, electrode terminal portion 210 may include a connection pin, and the connection pin may be connected to electrode 110 of capacitor element 100 by soldering or the like. Thus, the configuration (shape) of bus bar 200 may be changed as appropriate.

Furthermore, in the above embodiment, one capacitor element 100 is included in the capacitors (first capacitor 10A, second capacitor 10B). However, a plurality of capacitor elements 100 may be included in these

capacitors

10A and 10B.

Furthermore, in the above-described embodiment, the exterior body 400 is formed in a rectangular parallelepiped shape. However, exterior body 400 may be formed in another shape, such as an oblong cylinder shape similar to the shape of capacitor element 100 .
Furthermore, in the above embodiment, the capacitors (first capacitor 10A, second capacitor 10B) are arranged so that the holding members (first holding member 300A, second holding member 300B) face peripheral surface 102 of capacitor element 100. It was configured to be arranged. However,

capacitors

10A and 10B may be arranged such that holding

members

300A and 300B face end face 101 of capacitor element 100. FIG.

Furthermore, in the above-described embodiment, the capacitor element 100 is formed by stacking two metallized films in which aluminum is vapor-deposited on a dielectric film, and winding or laminating the stacked metallized films. Alternatively, the capacitor element 100 may be formed by stacking a metallized film in which aluminum is vapor-deposited on both sides of a dielectric film and an insulating film, and then winding or laminating them.

Furthermore, in the above embodiment, the capacitors (first capacitor 10A, second capacitor 10B) were film capacitors. However,

capacitors

10A and 10B may be capacitors other than film capacitors.

In addition, the embodiments of the present invention can be appropriately modified in various ways within the scope of the technical ideas indicated in the scope of claims.

In the description of the above embodiments, terms such as "upper" and "lower" indicate relative directions that depend only on the relative positional relationship of constituent members, and are vertical and horizontal. It does not indicate an absolute direction such as

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

1 capacitor module 2A casting container (mold member)
2B casting container (mold member)
10A First capacitor (capacitor)
10B Second capacitor (capacitor)
REFERENCE SIGNS LIST 100 capacitor element 101 end surface 102 peripheral surface 110 electrode 200 bus bar 220 connection terminal portion 300A first holding member (holding member)
300B first holding member (holding member)
311 opening 320 first connecting portion (connecting portion)
330 second connecting part (connecting part)
340 Fixed part 400 Exterior body 400a Upper surface (one surface)

Claims

In a capacitor,
a capacitor element having electrodes;
a bus bar connected to the electrodes;
a holding member that holds the busbar;
an exterior body that covers the entire capacitor element and a part of the bus bar and the holding member;
The holding member is provided with a connecting portion exposed from the exterior body and connected to the holding member of the other capacitor.
A capacitor characterized by:
A capacitor according to claim 1, wherein
The capacitor element has a pair of end faces and a peripheral face,
the electrodes are formed on the respective end faces;
The busbar is provided for each of the electrodes,
The holding member is arranged to face the peripheral surface,
A capacitor characterized by:
3. In the capacitor according to claim 1 or 2,
The exterior body has a rectangular parallelepiped shape,
a portion of the bus bar exposed from one surface of the exterior body and having a connection terminal portion to which an external terminal is connected to the exterior of the exterior body;
the connecting portion is connected to the holding member of the other capacitor in a direction parallel to the one surface;
A capacitor characterized by:
In the capacitor according to any one of claims 1 to 3,
The holding member is made of a resin material,
The capacitor element has a pair of end faces,
the electrodes are formed on the respective end faces;
The bus bar is provided for each of the electrodes and is insert-molded into the holding member.
A capacitor characterized by:
In the capacitor according to any one of claims 1 to 4,
The holding member is provided with an opening penetrating through the holding member in a direction in which the holding member and the capacitor element are aligned.
A capacitor characterized by:
A capacitor according to claim 5, wherein
An inner wall surface of the opening is provided with a taper in which the diameter of the opening increases in a direction away from the capacitor element,
A capacitor characterized by:
A capacitor according to any one of claims 1 to 6,
The holding member is provided with a fixing portion that can be fixed to an external device.
A capacitor characterized by:
A capacitor module configured by connecting a plurality of capacitors according to any one of claims 1 to 7.
A capacitor element unit formed by connecting a bus bar held by a holding member having a connecting portion to electrodes of a capacitor element is accommodated in a mold member,
injecting a resin in a liquid state into the mold member so that the entire capacitor element is immersed in the resin and the connecting portion is exposed from the resin;
forming a capacitor in which the injected resin is cured, and the cured resin serves as an exterior body and covers the capacitor element unit with the connecting portion exposed;
connecting a plurality of the capacitors by the connecting portion;
A method of manufacturing a capacitor module, characterized by: