JP2015220789A - Capacitor module and power conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor module capable of reducing the number of components and assembling manhours, and protecting a potting resin from heat damage without causing upsizing, and a power conversion device including the same.SOLUTION: A capacitor module 1 comprises a capacitor element, a potting resin 2 embedded with the capacitor element, and a plurality of plate-like bus bar terminals 3 connected to an electrode of the capacitor element and protruding from a potting surface 21. At least one of the plurality of bus bar terminal 3 is a welding terminal 4 including a welding part 41 welded to another component. When viewed from a normal direction of the potting surface 21, the welding part 41 is arranged outside the potting surface 21, and at least one of the bus bar terminals 3 includes a shielding part 40 shielding between the welding part 41 and at least a part of the potting surface 21.

Description

  The present invention relates to a capacitor module and a power conversion device including the capacitor module.

  For example, a power conversion device such as an inverter incorporates a capacitor module containing a capacitor element. Some capacitor modules have a capacitor element, a potting resin in which the capacitor element is embedded, and a plurality of plate-like bus bar terminals that are connected to the electrode of the capacitor element and protrude from the potting surface. A fastening member such as a screw is used to connect the bus bar terminal of the capacitor module to a terminal of another component such as a reactor (Patent Document 1).

JP 2013-132136 A

  However, the configuration in which the bus bar terminal of the capacitor module is connected to other parts by screw fastening has room for improvement in terms of the number of parts, assembly man-hours, and the like. That is, if the bus bar terminal is connected to a terminal of another component by welding, the number of components is reduced and the number of assembling steps is reduced.

  However, when welding is performed, generation of high-temperature gas from the welded portion and generation of spatter cannot be avoided, which may cause heat damage to the potting surface of the capacitor module. That is, there is a concern that high temperature gas or sputtering hits the potting surface, which may adversely affect the moisture-proof function, insulating function, etc. of the potting resin. In addition, in order to prevent this heat damage, it is conceivable that the welded portion of the bus bar terminal is greatly separated from the potting surface, but in this case, since the entire physique of the capacitor module becomes large, it is not realistic. Absent.

  The present invention has been made in view of such a background, and is capable of reducing the number of parts and the number of assembling steps, and a capacitor module capable of protecting a potting resin from thermal damage without causing an increase in size. It aims to provide the power converter device provided with.

One embodiment of the present invention includes a capacitor element;
Potting resin formed by embedding the capacitor element;
A plurality of plate-like bus bar terminals that are connected to the electrodes of the capacitor element and project from a potting surface that is the surface of the potting resin;
At least one of the plurality of bus bar terminals is a welding terminal having a welded portion to be welded to another component,
When viewed from the normal direction of the potting surface, the weld is disposed outside the potting surface,
At least one of the plurality of bus bar terminals may be a capacitor module having a shielding part that shields between the welded part and at least a part of the potting surface.

  Another aspect of the present invention is a power conversion device including the capacitor module, wherein the capacitor module and an electronic component electrically connected to the capacitor module are accommodated in a device case. The component terminal of the electronic component and the welding terminal are welded, and the device case has a protective plate portion disposed between a part of the potting surface and the welded portion. To power converter.

  In the capacitor module, at least one of the plurality of bus bar terminals is a welding terminal having a welded portion to be welded to another component. Therefore, the welding terminal and other parts can be connected by welding instead of screw fastening. As a result, the number of parts and assembly man-hours can be reduced.

  Further, when viewed from the normal direction of the potting surface, the welded portion is disposed outside the potting surface. Thereby, it can reduce that the high temperature gas and sputter | spatter which generate | occur | produce at the time of welding with a welding part and another component are scattered toward a potting surface. That is, at the time of welding, high-temperature gas and spatter are scattered in all directions from the welded portion, but by disposing the welded portion outside the potting surface, the high-temperature gas and spatter scattered toward the potting surface can be reduced.

  Moreover, at least one of the plurality of bus bar terminals has a shielding portion that shields between the welded portion and at least a part of the potting surface. Therefore, at least a part of the high-temperature gas and spatter that scatters toward the potting surface is blocked by the shielding portion. As a result, the potting resin can be protected from heat damage.

  In addition, it is not necessary to greatly separate the welded portion from the potting surface. As a result, it is not necessary to make the welding terminal protrude greatly, and an increase in the size of the capacitor module can be prevented.

  Moreover, in the said power converter device, the component terminal and welding terminal of the said electronic component are welded. Therefore, the number of parts and assembly man-hours can be reduced. Moreover, the said apparatus case has a protection board part distribute | arranged between some potting surfaces and a welding part. Therefore, high-temperature gas and spatter generated during welding can be shielded by the protection plate portion together with the shielding portion of the bus bar terminal. As a result, the potting surface can be protected from heat damage in a wider range.

  As described above, according to the present invention, the capacitor module that can reduce the number of parts and the number of assembling steps, and can protect the potting resin from heat damage without causing an increase in size, and the power conversion including the capacitor module are provided. An apparatus can be provided.

FIG. 3 is a perspective view of the capacitor module according to the first embodiment. FIG. 3 is a front view of the capacitor module according to the first embodiment. FIG. 3 is a top view of the capacitor module in the first embodiment. In Example 1, (a) Explanatory drawing of the state before welding of the welding part and the terminal of another component, (b) Explanatory drawing of the state after welding. The front view of the capacitor module in Example 2. FIG. FIG. 6 is a perspective view of a capacitor module according to the second embodiment. FIG. 10 is another perspective view of the capacitor module according to the second embodiment. Sectional drawing of the power converter device in Example 3. FIG. IX-IX arrow sectional drawing of FIG.

  The capacitor module constitutes a part of a power conversion device such as an inverter mounted on an electric vehicle, a hybrid vehicle, or the like. The power conversion device is used, for example, to generate a drive current for energizing an AC motor that is a power source of an electric vehicle, a hybrid vehicle, or the like.

Example 1
Examples of the capacitor module will be described with reference to FIGS.
As shown in FIGS. 1 to 3, the capacitor module 1 of this example includes a capacitor element 11, a potting resin 2 in which the capacitor element 11 is embedded, and a surface of the potting resin 2 connected to the electrode of the capacitor element 11 And a plurality of plate-like bus bar terminals 3 protruding from the potting surface 21.

  At least one of the plurality of bus bar terminals 3 is a welding terminal 4 having a welded portion 41 to be welded to another component. As shown in FIG. 2, when viewed from the normal direction of the potting surface 21 (hereinafter, this direction is appropriately referred to as “normal direction Y”), the welded portion 41 is disposed outside the potting surface 21. . At least one of the plurality of bus bar terminals 3 includes a shielding portion 40 that shields between the welded portion 41 and at least a part of the potting surface 21. In this example, the welding terminal 4 of the bus bar terminals 3 has a shielding part 40. The shielding part 40 is formed in parallel with the potting surface 21. 1 to 3, only one bus bar terminal 3 (welding terminal 4) is shown, and the other bus bar terminals are not shown.

  As shown in FIGS. 2 and 3, the capacitor element 11 and the potting resin 2 are accommodated in a capacitor case 5. The capacitor case 5 includes a rectangular plate-like bottom wall portion 51 and a side wall portion 52 erected vertically from an edge of the bottom wall portion 51. The capacitor case 5 is open on the side opposite to the bottom wall portion 51.

  As shown in FIGS. 1 and 2, the side wall 52 has a first side wall 521 and a second side wall 522 that face each other. Further, the side wall part 52 includes a third side wall part 523 and a fourth side wall part 524 that face each other in a direction orthogonal to the direction in which the first side wall part 521 and the second side wall part 522 face each other. In the following, the direction in which the first side wall portion 521 and the second side wall portion 522 face each other is referred to as “the height direction Z” as appropriate, the first side wall portion 521 side in the height direction Z is the “upper side”, The 2 side wall part 522 side is called "lower side." A direction orthogonal to both the height direction Z and the normal direction Y is referred to as a “lateral direction X”. Further, the side on which the potting surface 21 faces in the normal direction Y is referred to as “front”, and the opposite side is referred to as “rear”. The vertical and front / rear expressions are for convenience, and the vertical direction, the arrangement direction of the capacitor module 1 and the like are not particularly limited.

  The capacitor element 11 is sealed with the potting resin 2 filled in the capacitor case 5. The potting surface 21 is exposed on the side opposite to the bottom wall portion 51 of the capacitor case 5. As the potting resin 2, for example, an epoxy resin excellent in moisture resistance and insulation can be used. A bus bar terminal 3 protrudes from the potting surface 21.

  As shown in FIGS. 1 to 3, the welding terminal 4 of the bus bar terminals 3 includes a parallel portion 42 formed in parallel to the potting surface 21, and a standing portion 43 bent forward from an end edge of the parallel portion 42. And have. The welding terminal 4 has a shielding part 40 at the parallel part 42 and a welding part 41 at the end of the standing part 43.

  Specifically, the welding terminal 4 is connected to one electrode of the capacitor element 11 in the capacitor case 5 and is exposed from the potting surface 21 at a position near the first side wall portion 521 in the capacitor case 5. ing. The welding terminal 4 is bent toward the first wall portion 521 from the upright portion 44 rising in the normal direction Y from the potting surface 21 to form a parallel portion 42. The upper end of the parallel part 42 is located above the upper end of the potting surface 21. A standing portion 43 is erected in the normal direction Y from an edge of the parallel portion 42 on the side close to the fourth side wall portion 524. The parallel part 42 and the standing part 43 are orthogonal to each other. Further, the standing portion 43 is substantially parallel to the fourth side wall portion 524.

  The standing portion 43 is provided with a first protrusion 431 that protrudes upward and a second protrusion 432 that protrudes further upward from a part of the first protrusion 431. The second projecting portion 432 is the welded portion 41. The welding part 41 is arranged above the upper end of the potting surface 21. That is, the welded portion 41 is arranged at a position that does not overlap the potting surface 21 when viewed from the normal direction Y.

  As shown in FIG. 2, the parallel portion 42 is formed in a square plate shape. The parallel portion 42 partially overlaps the potting surface 21 when viewed from the normal direction Y. And between the welding part 41 and at least one part of the potting surface 21 is shielded by the parallel part 42. That is, the parallel part 42 becomes the shielding part 40. In other words, the parallel part 42 (shielding part 40) is arranged so as to intersect with at least a part of all the line segments connecting the welded part 41 and each part of the potting surface 21.

  When welding the welding terminal 4 and other parts, first, as shown in FIG. 4A, the welded portion 41 and the terminal 14 of the other part are placed in the thickness direction, that is, the lateral direction X. Overlapping. And the welding part 41 and the terminal 14 of another component are welded by TIG welding etc. FIG. Thereby, the capacitor module 1 and other components are connected. After welding, as shown in FIG. 4B, the welded portion 41 and the terminals 14 of other parts are melted and deformed to form a melted portion 46. In addition, as the terminal 14 of another component, it can be set as the terminal of a reactor or the terminal of the bus bar connected with a reactor, for example.

Next, the function and effect of this example will be described.
In the capacitor module 1 of this example, at least one of the plurality of bus bar terminals 3 is a welding terminal 4 having a welded portion 41 to be welded to another component. Therefore, the welding terminal 4 and other parts can be connected by welding rather than screw fastening. As a result, the number of parts and assembly man-hours can be reduced.

  Further, when viewed from the normal direction Y, the welded portion 41 is disposed outside the potting surface 21. Thereby, it is possible to reduce scattering of high-temperature gas and spatter generated during welding of the welded portion 41 and other parts toward the potting surface 21. That is, at the time of welding, high-temperature gas and spatter are scattered in all directions from the welded portion 41, but by disposing the welded portion 41 outside the potting surface 21, the high-temperature gas and spatter scattered toward the potting surface 21 are reduced. be able to.

  Further, at least one of the plurality of bus bar terminals 3 includes a shielding part 40 that shields between the welded part 41 and at least a part of the potting surface 21. Therefore, at least a part of the high-temperature gas or spatter that scatters toward the potting surface 21 is blocked by the shielding unit 40. As a result, the potting resin 2 can be protected from heat damage.

  Accordingly, it is not necessary to greatly separate the welded portion 41 from the potting surface 21. As a result, it is not necessary to make the welding terminal 4 protrude greatly, and an increase in the size of the capacitor module 1 can be prevented.

  Further, the welding terminal 4 has a shielding part 40. Therefore, the potting resin 2 can be protected from heat damage by the shielding part 40 of the welding terminal 4 itself. As a result, the degree of freedom of the arrangement position of the bus bar terminals 3 other than the welding terminals 4 can be improved. Further, the shielding part 40 is formed in parallel with the potting surface 21. Therefore, the potting surface 21 can be efficiently covered by the shielding part 40.

  The welding terminal 4 has a parallel portion 42 formed parallel to the potting surface 21 and a standing portion 43 bent in the normal direction Y from the edge of the parallel portion 42, and is shielded by the parallel portion 42. And a welded portion 41 at the end of the standing portion 43. Therefore, the structure of the welding terminal 4 can be simplified, and the potting resin 2 can be protected from heat damage without greatly separating the welding portion 41 from the potting surface 21.

  As described above, according to this example, it is possible to provide a capacitor module that can reduce the number of parts and the number of assembling steps and can protect the potting resin from heat damage without causing an increase in size.

(Example 2)
This example is a more specific example of the capacitor module 1 as shown in FIGS.
In the capacitor module 1 of this example, the bus bar terminals 3 other than the welding terminals 4 also have a shielding part 340. Further, the capacitor module 1 of this example is integrally provided with an attached bus bar 700 that is electrically insulated from the capacitor element 11. At least one of the attached bus bars 700 is a welding attached terminal 7 having an attached welded portion 71 to be welded to other parts. When viewed from the normal direction Y, the attached welded portion 71 is disposed outside the potting surface 21. At least one of the attached bus bars 700 has an attached shielding part 70 that shields between the attached welded part 71 and at least a part of the potting surface 21. The capacitor module 1 of this example has one attached bus bar 700, which is the attached terminal 7 for welding.

  The capacitor module 1 of this example has four bus bar terminals 3 (31, 32, 33, 34). One of these bus bar terminals 33 corresponds to the bus bar terminal 3 described in the first embodiment and is a welding terminal 4. The other three bus bar terminals 31, 32 and 34 are not welding terminals 4. The bus bar terminal 34 is connected to a switching element constituting the boost converter. The bus bar terminals 31 and 32 are connected to a pair of electrodes in the DC power supply, respectively.

  The bus bar terminals 31 and 32 protrude from the potting surface 21 in the vicinity of the lower end of the capacitor module 1. Further, the bus bar terminals 33 and 34 protrude from the potting surface 21 in the vicinity of the upper end portion of the capacitor module 1.

The bus bar terminal 33 has a bifurcated upper portion 44, and each portion protrudes from the potting surface 21 in the normal direction Y. The bus bar terminal 33 includes a rear bent portion 45 that extends upward from the parallel portion 42 (shielding portion 40) and is bent rearward along the upper surface of the first side wall portion 521.
Further, the standing portion 43 is bent forward from one end of the parallel portion 42 in the lateral direction X, and a welding portion 41 is formed at the upper end portion of the standing portion 43.

  A bus bar terminal 34 is arranged at a position adjacent to the fourth side wall portion 524 side of the standing portion 43 of the welding terminal 4. The bus bar terminal 34 includes an upright portion 344 protruding from the potting surface 21, a parallel portion 342 extending upward from an edge of the upright portion 344, and an upper end of the parallel portion 342 along the upper surface of the first side wall portion 521. A rear bent portion 345 is bent rearward.

  The parallel portion 342 of the bus bar terminal 34 is formed in a square plate shape. As shown in FIG. 5, the parallel portion 342 partially overlaps the potting surface 21 when viewed from the normal direction Y. The parallel portion 342 of the bus bar terminal 34 also shields between the welded portion 41 of the welding terminal 4 and at least a part of the potting surface 21. That is, the parallel part 342 of the bus bar terminal 34 is a shielding part 340 that shields between the welded part 41 of the welding terminal 4 and at least a part of the potting surface 21. That is, between the welded portion 41 of the welding terminal 4 and at least a part of the potting surface 21, the parallel portion 42 (shielding portion 40) of the welding terminal 4 and the parallel portion 342 (shielding portion 340) of the bus bar terminal 34 are provided. Is also shielded by.

  A placement portion 53 for placing the attached bus bar 700 is formed on the upper end portion of the third side wall portion 523 of the capacitor case 5. The upper end of the mounting portion 53 is formed above the upper end of the first side wall portion 521. Further, the placement portion 53 protrudes to the front of the capacitor case 5. An attached bus bar 700 is placed and held on the upper surface of the front end portion of the placement portion 53.

  The attached bus bar 700 is not electrically connected to the capacitor element 11, the welding terminal 4, and the bus bar terminal 3, but is insulated. The attached bus bar 700 can be used, for example, as a relay bus bar that connects a reactor and a semiconductor stacked unit (see Example 3 described later).

  The attached bus bar 700 includes a held portion 75 that is placed and held on the placement portion 53, a lower bent portion 76 that is bent downward from an end edge of the held portion 75 on the bus bar terminal 33 side, and the lower bent portion 76. The parallel portion 72 is bent toward the bus bar terminal 33 from the rear end thereof, and the standing portion 73 is bent forward from the end of the parallel portion 72 on the bus bar terminal 33 side. The parallel part 72 is formed in parallel with the potting surface 21. The attached bus bar 700 has the attached shielding part 70 at the parallel part 72 and the attached welded part 71 at the upper end of the standing part 73.

  The standing portion 73 is arranged at a position where at least a part thereof overlaps the parallel portion 42 of the welding terminal 4 when viewed from the normal direction Y. The standing portion 73 is provided with a first protrusion 731 protruding upward and a second protrusion 732 protruding further upward from a part of the first protrusion 731. The second protrusion 732 is the attached weld 71. As shown in FIG. 5, the attached welded portion 7 is arranged so as to be located above the potting surface 21. That is, the attached welded portion 71 is arranged at a position that does not overlap the potting surface 21 when viewed from the normal direction Y.

  The parallel part 72 is formed in a quadrangular plate shape. The parallel portion 72 partially overlaps the potting surface 21 when viewed from the normal direction Y. Moreover, the parallel part 72 is located ahead of the parallel part 42 of the welding terminal 4. And between the attached welding part 71 and at least one part of the potting surface 21 is shielded by the parallel part 72. That is, the parallel part 72 becomes the attached shielding part 70. In other words, the parallel part 72 (attached shielding part 70) is arranged so as to intersect with at least a part of all the line segments connecting the attached welded part 71 and each part of the potting surface 21.

  Furthermore, the space between the attached welded portion 71 and at least a part of the potting surface 21 is also shielded by the parallel portion 42 (shielding portion 40) of the welding terminal 4. That is, the space between the attached welded portion 71 and at least a part of the potting surface 21 is shielded by the parallel portion 72 and the parallel portion 42 (shielding portion 40) of the welding terminal 4.

  When welding the attached bus bar 700 and other parts, similarly to the welding of the welding terminal 41, the attached welded part 71 and the terminal 15 of the other part are overlapped in the thickness direction, that is, the lateral direction X. And welding by TIG welding or the like (see FIG. 4).

  As shown in FIGS. 5 to 7, a harness holder 50 that holds the wire harness 151 is formed on the third side wall portion 523. The wire harness 151 is connected to, for example, a DC-DC converter. And the connector 152 is provided in the front-end | tip of the wire harness 151, and the nail | claw part 54 for latching the connector 152 is formed in the lower surface of the 2nd side wall part 522 of the capacitor | condenser case 5 as shown in FIG. ing. By engaging the connector 152 with the claw portion 54, the wire harness 151 is prevented from swinging when the capacitor module 1 is incorporated into a power conversion device or the like, thereby preventing the smooth operation from being hindered.

  Others are the same as in the first embodiment. Of the reference numerals used in this example or the drawings relating to this example, the same reference numerals as those used in the first embodiment denote the same components as in the first embodiment unless otherwise specified.

  In the case of this example, the bus bar terminal 3 other than the welding terminal 4 has a shielding portion 340. Therefore, high-temperature gas and spatter scattered toward the potting surface 21 can be prevented not only by the shielding part 40 of the welding terminal 4 but also by the shielding part 340 of the bus bar terminal 3 other than the welding terminal 4. Therefore, the potting resin 2 can be further protected from heat damage.

In addition, since at least one of the attached bus bars 700 has an attached shielding part 70 that shields between the attached welded part 71 and at least a part of the potting surface 21, high-temperature gas and spatter scattered toward the potting surface 21 are generated. This can also be prevented by the attached shielding part 70 of the attached bus bar 700.
In addition, the same effects as those of the first embodiment are obtained.

  In this example, the attached bus bar has an attached welded portion that is welded to other parts, but an attached bus bar that is not welded to other parts may be used. In this case, the heat damage to the potting surface can be prevented by arranging the attached bus bar at a position that shields between the welded portion of the welding terminal and at least a part of the potting surface.

(Example 3)
This example is an example of the power converter 10 provided with the capacitor module 1 as shown in FIGS.
As shown in FIG. 8, the capacitor module 1 and the electronic component (reactor 12) electrically connected to the capacitor module 1 are accommodated in the device case 8. The reactor terminal 13 and the welding terminal 4 of the reactor 12 are welded to each other. The device case 8 has a protective plate portion 80 disposed between a part of the potting surface 21 and the welded portion 41.

  The device case 8 includes a first case portion 81 and a second case portion 82. The first case portion 81 has a case bottom portion 811 and a main body side wall portion 812 extending in the vertical direction from the end edge thereof. The upper side of the first case part 81 is covered with a second case part 82.

In addition to the reactor 12 and the capacitor module 1, a semiconductor multilayer unit 16 is accommodated in the device case 8.
The semiconductor stacked unit 16 is formed by stacking a plurality of semiconductor modules 161 and a plurality of cooling pipes 162. The cooling pipe 162 arranged at one end in the stacking direction is connected to a refrigerant introduction pipe 162a and a refrigerant discharge pipe 162b for introducing and discharging the refrigerant to and from the cooling pipe 162. Projects outward.
The semiconductor multilayer unit 16, the reactor 12, and the capacitor module 1 are arranged in this order in the stacking direction of the semiconductor multilayer unit 16.

  The capacitor module 1 is housed and disposed in a capacitor housing portion 813 formed in the first case portion 81. The structure of the capacitor module 1 is the same as that of the capacitor module 1 of the first embodiment.

  The welding terminal 4 of the capacitor module 1 and the reactor terminal 13 of the reactor 12 overlap with each other in the thickness direction, that is, the lateral direction X, and are welded to each other at the welding portion 41.

  As shown in FIG. 9, the protection plate 80 is erected upward from the case bottom 811 of the first case 81. And the protection board part 80 is distribute | arranged to the position adjacent to the potting surface 21, and is formed in square plate shape. The protection plate 80 faces the potting surface 21. As shown in FIG. 9, when viewed from the normal direction Y, the potting surface 21 in the lateral direction X is located inside the protective plate 80. That is, the protective plate 80 covers the entire potting surface 21 in the lateral direction X. In the height direction Z, the protective plate 80 is formed up to a position adjacent to the lower side of the welding terminal 4. That is, the protective plate 80 covers the potting surface 21 below the parallel portion 42 (shielding portion 40) of the welding terminal 4.

  A gap between the welded portion 41 and at least a part of the potting surface 21 is shielded by a protective plate portion 80. In other words, the protection plate portion 80 is arranged so as to intersect at least a part of all the line segments connecting the welded portion 41 and each portion of the potting surface 21. That is, the welded portion 41 and at least a part of the potting surface 21 are shielded by the protective plate portion 80 together with the parallel portion 42 (shielding portion 40) of the welding terminal 4.

  Others are the same as in the first embodiment. Of the reference numerals used in this example or the drawings relating to this example, the same reference numerals as those used in the first embodiment denote the same components as in the first embodiment unless otherwise specified.

In the present example, the device case 8 has a protective plate portion 80 disposed between a part of the potting surface 21 and the welded portion 41. Therefore, high-temperature gas and spatter scattered toward the potting surface 21 can be prevented not only by the shielding part 40 of the welding terminal 4 but also by the protective plate part 80.
In addition, the same effects as those of the first embodiment are obtained.

  In Example 3, the capacitor module of Example 1 was used as the capacitor module, but the capacitor module of Example 2 may be used.

DESCRIPTION OF SYMBOLS 1 Capacitor module 10 Power converter 11 Capacitor element 12 Electronic component 13 Component terminal 2 Potting resin 21 Potting surface 3 Bus bar terminal 4 Welding terminal 40 Shielding part 41 Welding part

Claims (7)

A capacitor element (11);
Potting resin (2) formed by embedding the capacitor element (11);
A plurality of plate-like bus bar terminals (3) connected to the electrodes of the capacitor element (11) and projecting from a potting surface (21) which is the surface of the potting resin (2);
At least one of the plurality of bus bar terminals (3) is a welding terminal (4) having a welded portion (41) to be welded to another component,
When viewed from the normal direction of the potting surface (21), the weld (41) is disposed outside the potting surface (21),
At least one of the plurality of bus bar terminals (3) has a shielding part (40) for shielding between the welded part (41) and at least a part of the potting surface (21). Module (1).   The capacitor module (1) according to claim 1, wherein the welding terminal (4) has the shielding portion (40).   The capacitor module (1) according to claim 1 or 2, wherein the shielding part (40) is formed in parallel to the potting surface (21).   The welding terminal (4) has a parallel part (42) formed parallel to the potting surface (21), and is bent from the edge of the parallel part (42) in the normal direction of the potting surface (21). A standing portion (43), the parallel portion (42) having the shielding portion (40), and an end portion of the standing portion (43) having the welded portion (41). Capacitor module (1) according to claim 3, characterized in.   The capacitor module (1) according to any one of claims 1 to 4, wherein the bus bar terminal (3) other than the welding terminal (4) has the shielding portion (340).   An accessory bus bar (700) that is electrically insulated from the capacitor element (11) is integrally provided, and at least one of the accessory bus bars (700) is attached to another part to be welded (71). ), And when viewed from the normal direction of the potting surface (21), the attached welding portion (71) is disposed outside the potting surface (21). At least one of the attached bus bars (700) has an attached shielding part (70) for shielding between the attached welded part (71) and at least a part of the potting surface (21). The capacitor module (1) according to any one of claims 1 to 5.   It is a power converter device (10) provided with the capacitor module (1) of Claims 1-6, Comprising: The electronic component electrically connected to the said capacitor module (1) and this capacitor module (1) ( 12) is housed in the device case (8), the component terminal (13) of the electronic component (12) and the welding terminal (4) are welded, and the device case (8). ) Has a protective plate part (80) arranged between a part of the potting surface (21) and the welded part (41).

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