JP2015228462A - Capacitor module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor module that can more enhance an effect of reducing inductance occurring at an anode-side external connection projection piece and a cathode-side external connection projection piece of each pair.SOLUTION: A capacitor module has two pairs of external connection projection pieces comprising anode-side external connection projection pieces 310A, 320A of n (for example, n=2) and two cathode-side external connection projection pieces 310B, 320B, and an anode-side joint portion 330A and a cathode-side joint portion 330B for joining the root portion of each anode-side external connection projection piece and the root portion of each cathode-side external connection projection piece. With respect to the anode-side external connection projection piece and the cathode-side external connection projection piece belonging to each pair, an anode-side overlap area of the anode-side external connection projection piece and a cathode-side overlap area of the cathode-side external connection projection piece which belong to the same pair are overlapped with each other, the anode-side overlap area belonging to one of adjacent pairs and the cathode-side overlap area belonging to the other pair are arranged to be overlapped with each other through an insulation member, and the anode-side joint portion and the cathode-side joint portion are arranged to be overlapped with each other over the substantially whole surfaces thereof through an insulation member.

Description

  The present invention relates to a capacitor module in which an external connection terminal portion is provided outside a case housing a capacitor element.

  As a smoothing capacitor element used in a high power circuit, for example, a film capacitor element is widely used. Film capacitor elements are relatively small compared to electrolytic capacitor elements, etc., so if a large capacity is required, the required capacity can be obtained by connecting multiple film capacitor elements in parallel. Is generally done.

  Moreover, in order to make it applicable to high power, when a plurality of film capacitor elements are connected in parallel, two electrode plates called bus bars are used as one electrode plate (anode side electrode plate). ) To connect the anodes of the plurality of capacitor elements, and connect the cathodes of the capacitor elements to the other electrode plate (referred to as a cathode side electrode plate).

  The plurality of film capacitor elements, the anode side electrode plate, and the cathode side electrode plate are accommodated in a case made of synthetic resin or the like, and the case is filled with resin. An external connection terminal (consisting of an anode side external connection terminal part and a cathode side external connection terminal part) for electrically connecting the capacitor element to the external module protrudes from the case. The anode side external connection terminal portion is integrally formed with the anode side electrode plate, and the cathode side external connection terminal portion is integrally formed with the cathode side electrode plate.

  In this specification, a plurality of film capacitor elements, an anode side electrode plate and a cathode side electrode plate, a case, a resin filled in the case, an anode side external connection terminal portion protruding outside the case, and The cathode side external connection terminal portion is referred to as a “capacitor module”.

  In the capacitor module configured as described above, a capacitor module that employs a structure that reduces inductance due to wiring (referred to as an inductance reduction structure) has been conventionally known (see, for example, Patent Document 1).

  FIG. 12 is a diagram for explaining the inductance reduction structure employed in the capacitor module described in Patent Document 1. In FIG. In Patent Document 1, the capacitor module is referred to as a “cased capacitor”.

  As shown in FIG. 12, an inductance reduction structure (hereinafter referred to as a conventional inductance reduction structure) employed in the capacitor module (capacitor with case) described in Patent Document 1 is one electrode plate (anode side electrode). Plate 910.) formed integrally with anode-side external connection convex piece 920 as an anode-side external connection terminal and other electrode plate (hereinafter referred to as cathode-side electrode plate) 930. The cathode-side external connection convex piece 940 as the cathode-side external connection terminal is partially overlapped with the insulating member 950 (the hatched region S in FIG. 12). In addition, the anode side external connection convex piece 920 and the cathode side external connection convex piece 940 make a pair, and are connected to an anode side terminal portion and a cathode side terminal portion of an external module (not shown).

  On the other hand, the anode side electrode plate 910 is connected to the anodes of a plurality of capacitor elements (not shown) in a case (not shown), and the cathode side electrode plate 930 is in the case (not shown). It is connected to each cathode of a plurality of capacitor elements (not shown). The anode-side electrode plate 910 and the cathode-side electrode plate 930 are arranged so that most of the regions overlap with each other through the insulating member 950.

  According to the conventional inductance reduction structure, the anode side electrode plate 910 and the cathode side electrode plate 930 are arranged so that most regions of the anode side electrode plate 910 and the cathode side electrode plate 930 overlap each other. Inductance generated in the can be reduced. Further, since the anode-side external connection convex piece 920 and the cathode-side external connection convex piece 940 are also arranged so as to partially overlap, in the anode-side external connection convex piece 920 and the cathode-side external connection convex piece 940, The generated inductance can be reduced.

Japanese Patent Laid-Open No. 2007-324311

  However, in the capacitor module (capacitor with case) disclosed in Patent Document 1, there is shown a case where the anode side external connection convex piece 920 and the cathode side external connection convex piece 940 are only one pair. .

  Accordingly, suppose that the external module to be connected to the capacitor module disclosed in Patent Document 1 has a plurality of sets (for example, two sets) of anode-side end terminals and cathode-side terminal sections. When the capacitor module disclosed in Patent Document 1 is connected to the anode side end terminal portion and the cathode side terminal portion of the set (two sets), a plurality of capacitor modules disclosed in Patent Document 1 are provided. (2) Necessary. In order to make this possible with one capacitor module, it is necessary to configure a capacitor module in which a plurality of pairs (two sets) of anode-side external connection convex pieces and cathode-side external connection convex pieces are provided.

  Thus, when a capacitor module is provided in which a plurality of pairs of anode-side external connection convex pieces and cathode-side external connection convex pieces are provided, a plurality of sets of anode-side external connection convex pieces and cathodes are provided in the capacitor module. In order to reduce the inductance generated in the side external connection convex piece, it is necessary to further devise the inductance reduction structure described in Patent Document 1.

  Therefore, the present invention provides a capacitor module in which a plurality of pairs of anode-side external connection convex pieces and cathode-side external connection convex pieces are provided, and in each set of anode-side external connection convex pieces and cathode-side external connection convex pieces. An object of the present invention is to provide a capacitor module that can further enhance the effect of reducing the generated inductance.

  [1] A capacitor module according to the present invention includes a case for storing a capacitor element, a plate-like anode side provided to protrude outside the case, and connected to an anode side terminal portion and a cathode side terminal portion of the external module. A capacitor module having an external connection terminal portion and a plate-like cathode side external connection terminal portion, wherein the anode side external connection terminal portion includes n (n is an integer of 2 or more) anode side external connection convex pieces, An anode-side connecting portion that connects the base portions of the n anode-side external connection convex pieces to each other, and the cathode-side external connection terminal portion includes n cathode-side external connection convex pieces and the n pieces A cathode side connecting portion that mutually connects bases of the cathode side external connection convex pieces, and the n anode side external connection convex pieces and the n cathode side external connection convex pieces are the n pieces. The anode-side external connection convex piece and the n cathode-side external connection pieces N pairs of external connection convex pieces are formed in pairs with each other, and each of the anode side external connection convex pieces is connected to the anode side terminal portion of the external module; an anode-side overlapping region that overlaps a part of at least one cathode-side external connection convex piece of the n cathode-side external connection convex pieces, and each of the cathode-side external connection convex pieces is provided on the external module. A cathode side external connection region connected to the cathode side terminal part and a cathode side overlap overlapping the anode side overlap region of at least one anode side external connection convex piece among the n anode side external connection convex pieces The anode-side external connection convex piece and the cathode-side external connection convex piece belonging to each of the n sets, each of the anode-side overlap area and each cathode-side overlap area belonging to the same set is an insulating member Placed with overlap through The anode-side external connection convex pieces and the anode-side external connection convex pieces belonging to one set adjacent to each other in the arrangement direction of the cathode-side external connection convex pieces are arranged in the anode-side overlapping region and the other set. The cathode side external connection convex piece belonging to the cathode side overlapping region is disposed so as to overlap through an insulating member, and the anode side connecting portion and the cathode side connecting portion are substantially interposed via the insulating member. It is characterized by being arranged with an overlap on the entire surface.

  In the capacitor module of the present invention, n (n is an integer of 2 or more) anode-side external connection convex pieces and n cathode-side external connection convex pieces individually form a pair, and n sets of external connection convex pieces are provided. A capacitor module formed, wherein the anode side external connection convex piece and the anode side external connection convex piece are the anode side overlapping region of the anode side external connection convex piece belonging to the same set and the cathode side. An anode belonging to one set adjacent to each other in the arrangement direction of each anode-side external connection convex piece and each cathode-side external connection convex piece, which is arranged so as to overlap with the cathode side overlapping region of the external connection convex piece The anode side overlapping region of the side external connection convex piece and the cathode side overlapping region of the cathode side external connection convex piece belonging to the other set are arranged with an overlap through an insulating member, and the anode side connecting portion and the cathode Side connection They are disposed with overlapping substantially the entire surface of an insulating member. For this reason, in the capacitor module in which n sets (a plurality of sets) of anode-side external connection convex pieces and cathode-side external connection convex pieces are provided in pairs, each set of anode-side external connection convex pieces and cathode-side external connection convex pieces The effect of reducing the inductance generated in the above can be further enhanced.

  Further, as described above, each anode-side external connection convex piece and each cathode-side external connection convex piece each have an overlapping region, so that the width in the arrangement direction (referred to as a lateral width) becomes wide. Yes. Thus, the wide width of each anode-side external connection convex piece and each cathode-side external connection convex piece means that the current flows in each anode-side external connection convex piece and each cathode-side external connection convex piece. This leads to an increase in the area (surface area and cross-sectional area) that can be flowed. Thereby, even when a large current flows, the current easily flows, so that an effect of suppressing heat generation of each anode-side external connection convex piece and each cathode-side external connection convex piece is obtained. Furthermore, since the surface area of each anode side external connection convex piece and each said cathode side external connection convex piece becomes large, the effect that it is excellent also in heat dissipation is acquired. Furthermore, since the area of each anode side external connection convex piece and each said cathode side external connection convex piece becomes large, the effect that mechanical strength can also be raised is also acquired.

  Here, the interval between the anode-side terminal portion and the cathode-side terminal portion of the external module (the interval between the pair of anode-side terminal portion and cathode-side terminal portion) is predetermined for each type depending on the type of external module. In many cases, the interval (pitch) between the anode-side external connection region of each anode-side external connection convex piece and the cathode-side external connection region of each cathode-side external connection convex piece is determined. There are restrictions. However, even if there are such restrictions, by forming overlapping regions on each anode-side external connection convex piece and each cathode-side external connection convex piece, the effect of reducing the inductance is further increased, and heat generation is suppressed, The pitch can be maintained while increasing the mechanical strength.

  [2] In the capacitor module of the present invention, among the n anode-side external connection convex pieces, the cathode-side external connection convex pieces belonging to the adjacent set are also arranged to overlap. The anode-side external connection convex piece is formed wider than the anode-side external connection convex piece arranged in an overlapping manner only with the cathode-side external connection convex piece belonging to the same set. Of the n cathode-side external connection convex pieces, the cathode-side external connection convex pieces arranged so as to overlap with the anode-side external connection convex pieces belonging to the adjacent set are the same as those described above. The width in the arrangement direction is wider than that of the cathode side external connection convex pieces arranged so as to overlap only with the anode side external connection convex pieces belonging to the set.

  By adopting such a configuration, the anode side external connection convex piece belonging to the adjacent set and the anode side external connection convex piece belonging to the adjacent set and the anode side external connection convex piece belonging to the adjacent set are also arranged. In addition, the cathode side external connection convex pieces arranged in an overlapping manner can have a larger area (surface area and cross-sectional area). For this reason, the effect which can suppress the heat_generation | fever of an anode side external connection convex piece and a cathode side external connection convex piece, the effect that it is excellent in heat dissipation, and the effect that mechanical strength can also be heightened more each increase. be able to.

  [3] In the capacitor module according to the present invention, the base portion of the anode-side overlapping region in the anode-side external connection convex piece positioned on one end side in the arrangement direction of the n pieces of anode-side external connection convex pieces is connected to the connecting portion. The other end side opposite to the one end side in the direction in which the n cathode side external connection convex pieces are arranged. A cathode-side extension region that extends from the cathode-side overlap region is formed at the base of the cathode-side overlap region in the cathode-side external connection convex piece that extends outward from the cathode-side overlap region; A side extension region and the cathode side external connection region located on the one end side are disposed with an overlap through an insulating member, and the cathode side extension region and the anode side external connection region located on the other end side; Through the insulation That it is arranged with an overlap Te is preferred.

  In this way, the anode-side extension region and the cathode-side extension region are formed to extend, and the anode-side extension region is disposed so as to overlap the cathode-side external connection region located on one end side, and the cathode-side extension region The region is arranged so as to overlap the anode side external connection region located on the other end side. For this reason, it is possible to further widen the overlapping region, thereby further enhancing the inductance reduction effect, and among the effects described in [1] above, “each anode-side external connection convex piece” Further, it is possible to suppress the heat generation of the cathode-side external connection convex pieces, to improve heat dissipation, and to increase the mechanical strength.

  [4] In the capacitor module of the present invention, the insulating member is electrically disconnected from the anode-side external connection convex piece and the cathode-side external connection convex piece inside the insulating member. It is preferable that a conductive member is provided.

  Thus, by providing the conductive member that is electrically disconnected from the anode side external connection convex piece and the cathode side external connection convex piece inside the insulating member, the effect of reducing inductance is further enhanced. Has been confirmed by experiments.

  [5] In the capacitor module of the present invention, each anode-side external connection region in each anode-side external connection convex piece and each cathode-side external connection region in each cathode-side external connection convex piece are the anodes. The connection surface that contacts the anode-side terminal portion of the external module in the side external connection region and the connection surface that contacts the cathode-side terminal portion of the external module in the cathode-side external connection region can exist on substantially the same plane. Thus, it is preferable that at least one of the anode side external connection region and the cathode side external connection region is bent.

  With such a configuration, when the anode side terminal portion and the cathode side terminal portion of the external module are on the same plane, the connection surface of the anode side external connection region and the connection surface of the cathode side external connection region Can be brought into contact with a plane where the anode side terminal portion and the cathode side connection terminal of the external module are present without using a spacer or the like. Thereby, the connection operation | work at the time of connecting the capacitor | condenser module of this invention to an external module can be made easy.

  [6] In the capacitor module of the present invention, each anode-side external connection region in each anode-side external connection convex piece and each cathode-side external connection region in each cathode-side external connection convex piece are the anodes. The connection surface that contacts the anode side terminal portion of the external module in the side external connection region and the connection surface that contacts the cathode side terminal portion of the external module in the cathode side external connection region can exist on substantially the same plane. And, the overlapping region directly facing the anode side terminal portion or the cathode side terminal portion of the external module among the anode side overlapping region and the cathode side overlapping region is the anode side terminal portion or the cathode side of the external module. The anode-side external connection region and the cathode-side external connection region are preferably bent so as to be separated from the terminal portion.

  Even in such a configuration, when the anode side terminal portion and the cathode side terminal portion of the external module are present on the same plane, the connection surface of the anode side external connection region and the connection surface of the cathode side external connection region Can be brought into contact with a plane where the anode side terminal portion and the cathode side connection terminal of the external module are present without using a spacer or the like. Thereby, the connection operation | work at the time of connecting the capacitor | condenser module of this invention to an external module can be made easy.

  Further, of the anode side overlapping region and the cathode side overlapping region, the overlapping region directly facing the anode side terminal portion or the cathode side terminal portion of the external module is connected to the anode side terminal portion or the cathode side terminal portion of the external module. Since the anode side external connection region and the cathode side external connection region are bent so as to be separated from each other, the connection surface of the anode side external connection region and the connection surface of the cathode side external connection region are connected to the anode side terminal portion of the external module. Gap between the anode-side terminal portion of the external module or the overlapping area directly facing the cathode-side terminal portion and the anode-side terminal portion or the cathode-side terminal portion of the external module Is formed.

  For this reason, for example, if any member (for example, between the overlapping region directly facing the anode side terminal portion or the cathode side terminal portion of the external module and the anode side terminal portion or the cathode side terminal portion of the external module) Even when a member for increasing the creepage distance is interposed, a member for increasing the creepage distance (referred to as a creepage distance extending member) can be accommodated in the gap. As a result, the presence of the creepage distance extension member becomes an obstacle when the connection surface of the anode side external connection region and the connection surface of the cathode side external connection region are brought into contact with the anode side terminal portion and the cathode side terminal portion of the external module. Can be prevented.

  [7] In the capacitor module of the present invention, the anode-side overlap region and the cathode-side overlap region have insulating properties for increasing the creepage distance between the anode-side overlap region and the cathode-side overlap region. It is preferable that a creeping distance extending member is provided.

  By setting it as such a structure, the creeping distance between an anode side overlapping area | region and a cathode side overlapping area | region can be lengthened. Thereby, the problem caused by the short creepage distance, that is, the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration can be solved.

  [8] In the capacitor module of the present invention, the creeping distance extending member includes a side end and a tip of the anode side overlapping region, and a side of the anode continuous from the side end and the top of the anode side overlapping region. At least part of the outer surface of the overlapping region, the side end and upper end of the cathode side overlapping region, and at least the outer surface of the cathode side overlapping region continuous from the side end and upper end of the cathode side overlapping region. It is preferable to cover a part and to be interposed between the anode side overlapping region and the cathode side overlapping region.

  By setting it as such a structure, the creeping distance between each anode side overlapping area | region and each cathode side overlapping area | region can be lengthened.

  [9] In the capacitor module of the present invention, the insulating member is preferably formed in a cap shape from a synthetic resin material.

  By forming the creeping distance extending member in this way, the creeping distance between each anode side overlapping region and each cathode side overlapping region can be reliably increased.

  [10] In the capacitor module of the present invention, it is preferable that the insulating member is formed of a foldable insulating member.

  Even when the creeping distance extending member is formed in this manner, the creeping distance between each anode-side overlapping region and each cathode-side overlapping region can be reliably increased.

  [11] A capacitor module according to the present invention includes a case for storing a capacitor, and a plate-like anode side external member that protrudes from the case and is connected to the anode side terminal portion and the cathode side terminal portion of the external module. A capacitor module having a connection terminal portion and a plate-like cathode-side external connection terminal portion, wherein the anode-side external connection terminal portion has an anode-side external connection convex piece, and the cathode-side external connection terminal portion is A cathode side external connection convex piece, the anode side external connection convex piece being an anode side external connection region connected to the anode side terminal portion of the external module, and a part of the cathode side external connection convex piece; A cathode-side external connection region that is connected to the cathode-side terminal portion of the external module; and the anode-side external connection. A cathode-side overlap region that overlaps the anode-side overlap region of the piece via an insulating member, and the anode-side external connection convex piece and the anode-side external connection convex piece are the anode-side overlap region and the cathode-side overlap region. And the anode-side overlap region and the cathode-side overlap region are insulated to increase the creepage distance between the anode-side overlap region and the cathode-side overlap region. A characteristic creeping distance extending member is provided.

  This is because, regardless of the number of pairs of anode-side external connection convex pieces and cathode-side external connection convex portions, a creeping distance extending member is provided in the anode-side overlap region and the cathode-side overlap region, so that the anode-side overlap region and the cathode It is possible to increase the creepage distance between the side overlapping regions. Thereby, the problem caused by the short creepage distance, that is, the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration can be solved. Note that the capacitor module of the present invention described in [11] can also have the characteristics described in [1] to [10].

FIG. 3 is a view of the external appearance of the capacitor module 10 according to the first embodiment when viewed from the side of an external terminal portion 300 (having an anode side external connection terminal portion 300A and a cathode side external connection terminal portion 300B). FIG. 3 is a schematic diagram showing an anode-side external connection terminal portion 300A and a cathode-side external connection terminal portion 300B in the capacitor module shown in FIG. 1 individually. It is a schematic diagram which shows arrangement | positioning of the anode side external connection terminal part 300A and the cathode side external connection terminal part 300B in the external connection terminal part 300 shown in FIG. It is a figure which shows the insulating member 500 interposed in the overlapping area | region of the anode side external connection terminal part 300A and the cathode side external connection terminal part 300B. It is a schematic diagram which shows arrangement | positioning with the anode side external connection terminal part 300A and the cathode side external connection terminal part 300B in the capacitor | condenser module 20 which concerns on Embodiment 2. FIG. It is a figure which shows the 1st modification of the capacitor | condenser module 20 which concerns on Embodiment 2. FIG. It is a figure which shows the 2nd modification of the capacitor | condenser module 20 which concerns on Embodiment 2. FIG. FIG. 6 is a diagram for illustrating a first aspect of a capacitor module according to Embodiment 3. FIG. 10 is a diagram for explaining a second aspect of the capacitor module according to the third embodiment. FIG. 10 is a diagram for explaining a third aspect of the capacitor module according to the third embodiment. To describe a case where a conductive member that is electrically disconnected from the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B is provided inside the insulating member 500. FIG. It is a figure shown in order to demonstrate the inductance reduction structure employ | adopted in the capacitor | condenser module described in patent document 1. FIG.

  Hereinafter, embodiments of the present invention will be described.

[Embodiment 1]
FIG. 1 is a view of the external appearance of the capacitor module 10 according to the first embodiment when viewed from the side of an external connection terminal portion 300 (having an anode-side external connection terminal portion 300A and a cathode-side external connection terminal portion 300B).
FIG. 2 is a schematic diagram showing the external connection terminal part 300 anode side external connection terminal part 300A and the cathode side external connection terminal part 300B in the capacitor module shown in FIG. 1 individually. FIG. 2A is a view showing the anode side external connection terminal portion 300A, and FIG. 2B is a view showing the cathode side external connection terminal portion 300B.

FIG. 3 is a schematic view schematically showing the arrangement of the anode side external connection terminal portion 300A and the cathode side external connection terminal portion 300B in the external connection terminal portion 300 shown in FIG. FIG. 3 is an enlarged sectional view taken along the line aa in FIG. However, the case 200 of the capacitor module 10 is not shown in FIG. Moreover, since FIG. 3 is an enlarged view and is a schematic diagram, the dimension does not correspond to each part in FIG.
FIG. 4 is a diagram showing an insulating member 500 interposed in an overlapping region between the anode side external connection terminal portion 300A and the cathode side external connection terminal portion 300B. The overlapping area will be described later.

Hereinafter, the capacitor module 10 according to the first embodiment will be described with reference to FIGS.
The capacitor module 10 according to the first embodiment is provided with a case 200 that houses a plurality of film capacitors (not shown), and protrudes outside the case 200, and is connected to an external module (not shown). External connection terminal section 300, an anode side input terminal 400A for supplying predetermined power to a plurality of capacitors, and a cathode side input terminal 400B. The external connection terminal portion 300 includes a plate-like anode-side external connection terminal portion 300A and a plate-like cathode-side external connection terminal portion 300B.

The anode-side external connection terminal portion 300A connects n pieces (two) of anode-side external connection convex pieces 310A and 320A and the root portions of the two anode-side external connection convex pieces 310A and 320A to each other. And an anode side connecting portion 330A.
Similarly, in the cathode side external connection terminal portion 300B, n (two) cathode side external connection convex pieces 310B and 320B and the base portions of the two cathode side external connection convex pieces 310B and 320B are mutually connected. And a cathode side connecting portion 330B connected to the.

  Further, the anode in the anode-side external connection convex piece 320A (refer to FIG. 2A) located on one end side (referred to as the right end side in FIG. 2) in the arrangement direction of the anode-side external connection convex pieces 310A and 320A. At the base of the side overlap region 322A, an anode side extension region 340A that is an extension of the connection portion (anode side connection portion 330A) extends outward from the anode side overlap region 322A (on the right side in FIG. 2). Is formed. Further, in the cathode-side external connection convex piece 310B (refer to FIG. 2B) located on the other end side (the left end side in FIG. 2) in the arrangement direction of the cathode-side external connection convex pieces 310B and 320B. A cathode-side extension region 340B, which is an extension of the connecting portion (cathode-side connecting portion 330B), extends outward from the cathode-side overlapping region 312B (on the left side in FIG. 2) at the base of the cathode-side overlapping region 312B. Has been formed.

  The anode-side extension region 340A and the base portion of the cathode-side external connection region 321B located on one end side (right end side in FIG. 2) overlap with each other via an insulating member 500 (not shown in FIG. 2). The insulating member 500 (not shown in FIG. 2) includes the cathode-side extension region 340B and the base portion of the anode-side external connection region 311A located on the other end side (left end side in FIG. 2). ) Are arranged to overlap each other.

  By the way, the two anode side external connection convex pieces 310A and 320A and the two cathode side external connection convex pieces 310B and 320B are paired with the anode side external connection convex piece 310A and the cathode side external connection convex piece 310B. The anode side external connection convex piece 320A and the cathode side external connection convex piece 320B form a pair.

  Thus, in the capacitor module 10 according to the first embodiment, two pairs of anode-side external connection convex pieces and cathode-side external connection convex pieces that form a pair are provided. The anode-side external connection convex piece and the cathode-side external connection convex piece belonging to the same set have an overlapping region in a part near the adjacent end portions of the anode-side external connection convex piece and the cathode-side external connection convex piece. It has been arranged.

  That is, the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B belonging to one of the two sets (referred to as the first set) are the anode-side external connection convex piece 310A belonging to the first set. The arrangement has an overlapping region S1 in a part of the vicinity of the adjacent end portion of the cathode-side external connection convex piece 310B. Specifically, an overlapping region S1 is formed between a predetermined region on the right end portion side of the anode side external connection convex piece 310A and a predetermined region on the left end portion side of the cathode side external connection convex piece 310B.

  The anode side external connection convex piece 320A and the cathode side external connection convex piece 320B belonging to the other group (referred to as the second group) are the anode side external connection convex piece 320A and the cathode side external connection convex part belonging to the second group. The arrangement has an overlapping region S2 in a part near the adjacent end portion of the piece 320B. Specifically, an overlapping region S2 is formed between a predetermined region on the right end portion side of the anode side external connection convex piece 320A and a predetermined region on the left end portion side of the cathode side external connection convex piece 320B.

  In addition, the anode side external connection convex piece and the cathode side external connection convex piece belonging to the same set are arranged to have overlapping regions S1 and S2 in a part of the vicinity of adjacent end portions, and adjacent to each other. Even in the pair (in this case, the first pair and the second pair), adjacent end portions of the anode-side external connection convex piece belonging to the one adjacent pair and the cathode-side external connection convex piece belonging to the other pair It is arranged with an overlapping region in a part of the vicinity. In this case, if one set is the second set and the other set is the first set, the anode-side external connection convex piece 320A belonging to the second set and the cathode-side external connection convex piece 310B belonging to the first set The arrangement has an overlapping region S3 in a part of the vicinity of adjacent end portions. Specifically, an overlapping area S3 is formed between a predetermined area on the left side of the anode side external connection convex piece 320A and a predetermined area on the right side of the cathode side external connection convex piece 310B.

  On the other hand, each of the anode-side connecting portion 330A and the cathode-side connecting portion 330B is disposed so that almost the entire surface faces each other, and therefore, as shown in FIG. Further, as described above, the anode-side extension region 340A and the cathode-side external connection region 321B have an overlapping region at the base portion of the cathode-side external connection region 321B (see FIG. 2). Further, as described above, the cathode-side extension region 340B and the anode-side external connection region 311A have an overlapping region at the root of the anode-side external connection region 311A (see FIG. 2). The overlapping regions of the anode side connecting portion 330A and the cathode side connecting portion 330B, the overlapping regions of the anode side extending region 340A and the cathode side external connecting region 321B, and the cathode side extending region 340B and the anode side external connecting region 311A are expressed as “ Let it be an overlapping region S4 "(see FIG. 2). In FIG. 1 and FIG. 2, these overlapping regions S1, S2, S3, and S4 are hatched.

  Further, the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B are provided in the overlapping regions S1, S2, and S3, and the anode side connection portion 330A and the cathode side connection portion 330B. An insulating member 500 (see FIG. 4) is interposed in the overlapping region S4.

  By the way, in the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B, areas other than the overlapping areas S1, S2, and S3 where both overlap each other are anodes of external modules (not shown). It is an external connection area for connecting to the side terminal part and the cathode side terminal part. That is, the anode-side external connection convex pieces 310A and 320A and the cathode-side external connection convex pieces 310B and 320B each have an external connection region and an overlapping region.

  Here, in the anode-side external connection convex piece 310A, the external connection region in the anode-side external connection convex piece 310A is “anode-side external connection region 311A”, and in the anode-side external connection convex piece 320A, the anode-side external connection piece The external connection area in the connection convex piece 310A is “anode side external connection area 321A”, and in the cathode side external connection convex piece 310B, the external connection area in the cathode side external connection convex piece 310B is “cathode side external connection area 311B”. In the cathode side external connection convex piece 320B, the external connection area in the cathode side external connection convex piece 320B is referred to as “cathode side external connection area 321B”.

  In addition, each overlap area | region S1, S2, S3 is made into the overlap area | region in the anode side external connection convex piece 310A, 320A, and the cathode side external connection convex piece 310B. When it is necessary to divide the description into the overlapping regions in 320B, regarding the overlapping region S1, the overlapping region in the anode-side external connection convex piece 310A is referred to as “anode-side overlapping region 312A”, and the cathode-side external connection convex piece 310B. The overlapping region in FIG. 4 is referred to as “cathode side overlapping region 312B”.

  Regarding the overlapping region S2, the overlapping region in the anode-side external connection convex piece 320A is referred to as “anode-side overlapping region 322A”, and the overlapping region in the cathode-side external connection convex piece 320B is referred to as “cathode-side overlapping region 322B”. Regarding the region S3, the overlapping region in the anode side external connection convex piece 320A will be described as “anode side overlapping region 323A”, and the overlapping region in the cathode side external connection convex piece 310B will be described as “cathode side overlapping region 313B”.

  Here, the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B are arranged using the anode side overlapping regions 312A, 322A and 323A and the cathode side overlapping regions 312B, 313B and 322B. Explaining, the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B are the anode side overlapping region 312A and the cathode side external connection convex piece in the anode side external connection convex piece 310A belonging to the first set. The cathode side overlapping region 312B in 310B is arranged with an overlap, and the anode side overlapping region 322A in the anode side external connection convex piece 320A belonging to the second set and the cathode side overlapping region in the cathode side external connection convex piece 320B. The region 322B is disposed so as to overlap. Also, in the groups adjacent to each other, the anode-side overlapping region 323A and the other group (referred to as the first set) in the anode-side external connection convex piece 320A belonging to one adjacent group (referred to as the second set). And the cathode side overlapping region 313B of the cathode side external connection convex piece 310B belonging to the above are disposed so as to overlap each other.

  Thus, each anode-side external connection convex piece 310A, 320A and each cathode-side external connection convex piece 310B, 320B have overlapping regions in each, and therefore the width (horizontal width) in the respective alignment direction becomes wide. ing. Thus, the wide width of each anode-side external connection convex piece 310A, 320A and each cathode-side external connection convex piece 310B, 320B means that each of these anode-side external connection convex pieces 310A, 320A and each cathode This leads to an increase in the area (surface area and cross-sectional area) of the side external connection convex pieces 310B and 320B. Thereby, even if it is a case where a big electric current is sent, the effect that the heat_generation | fever of each anode side external connection convex piece 310A, 320A and each cathode side external connection convex piece 310B, 320B can be suppressed is acquired. Furthermore, since the area of each anode side external connection convex piece 310A, 320A and each cathode side external connection convex piece 310B, 320B becomes large, the effect that it is excellent also in heat dissipation is acquired. Furthermore, since the area of each anode side external connection convex piece 310A, 320A and each cathode side external connection convex piece 310B, 320B becomes large, the effect that mechanical strength can also be raised is acquired.

  The reason why the lateral width of each anode-side external connection convex piece 310A, 320A and each cathode-side external connection convex piece 310B, 320B is wide is that the anode-side terminal portion and cathode-side terminal portion of the external module are The interval (the interval between the anode-side terminal portion and the cathode-side terminal portion forming a pair) is often set to a predetermined interval for each type depending on the type of external module, etc. This is because there is a restriction that the interval (pitch) between the anode side external connection region of the pieces 310A and 320A and the cathode side external connection region of each cathode side external connection convex piece 310B and 320B is determined.

  For example, in the external module to be connected to the capacitor module 10 according to the first embodiment, two sets of the anode side terminal portion and the cathode side terminal portion that form a pair of external modules are provided, and each pair forms a pair. Assuming that the distance between the anode-side terminal portion and the cathode-side terminal portion is D1, respectively, the connections provided in the anode-side external connection region 311A and the cathode-side external connection region 311B in the capacitor module 10 according to the first embodiment. The interval between the holes h is also set to “D1” (see FIG. 3), and the interval between the connection holes h provided in each of the anode side external connection region 321A and the cathode side external connection region 321B is also “D1”. (See FIG. 3). In addition, the interval between the anode-side external connection region 321A in the anode-side external connection convex piece 320A and the cathode-side external connection region 311B in the cathode-side external connection convex piece 310B in the adjacent sets is also external. For example, “D2” is set in accordance with the module (see FIG. 3).

  Even if there are such restrictions, by forming overlapping regions on each anode-side external connection convex piece 310A, 320A and each cathode-side external connection convex piece 310B, 320B, the inductance reduction effect can be further enhanced and heat generation can be achieved. It is possible to suppress the pitch and maintain the pitch while increasing the mechanical strength.

  Of the two anode-side external connection convex pieces 310A and 320A, the anode-side external connection convex piece 320A arranged so as to overlap with the cathode-side external connection convex piece 310B belonging to the adjacent set, The width in the arrangement direction is wider than that of the anode-side external connection convex piece 310A arranged so as to overlap only with the cathode-side external connection convex piece 310B belonging to the same group. Similarly, among the two cathode-side external connection convex pieces 310B and 320B, the cathode-side external connection convex piece 310B arranged so as to overlap with the anode-side external connection convex piece 320A belonging to the adjacent set is The width in the arrangement direction is wider than that of the cathode-side external connection convex piece 320B arranged so as to overlap only with the anode-side external connection convex piece 320A belonging to the same set.

  As described above, in the anode-side external connection convex piece 320A arranged so as to overlap with the cathode-side external connection convex piece 310B belonging to the adjacent set, and the anode-side external connection convex piece 320A belonging to the adjacent set. Further, the cathode-side external connection convex piece 310B arranged with an overlap can have a larger area (surface area and cross-sectional area). For this reason, the effect which can suppress the heat_generation | fever of an anode side external connection convex piece and a cathode side external connection convex piece, the effect that it is excellent in heat dissipation, and the effect that mechanical strength can also be heightened more each increase. be able to.

  The anode-side external connection terminal portion 300A configured as described above is integrally formed with an anode-side bus bar (also referred to as an anode-side electrode plate) 350A (see FIG. 2) provided in the case 200. Similarly, the cathode-side external connection terminal portion 300B is integrally formed with a cathode-side bus bar (also referred to as a cathode-side electrode plate) 350B (see FIG. 2) provided in the case 200.

  Specifically, in the anode-side external connection terminal portion 300A, an extension portion obtained by extending the anode-side electrode plate 350A to the outside of the case 200 becomes the anode-side connection portion 330A. And two anode side external connection convex pieces 310A, 320A are formed on the anode side connecting portion 330A.

  Similarly, in the cathode-side external connection terminal portion 300B, an extended portion obtained by extending the cathode-side electrode plate 350B to the outside of the case 200 is a cathode-side connecting portion 330B. And two cathode side external connection convex pieces 310B and 320B are formed in the cathode side connecting portion 330B.

  In the capacitor module 10 according to the first embodiment, the anode side electrode plate 350A and the cathode side electrode plate 350B are disposed in the case 200 in a state where the anode side electrode plate 350A and the cathode side electrode plate 350B are bent by 90 degrees along the one-dot chain line portion α1 in FIG. However, FIG. 2 shows a state in which it is not bent.

  The anode side electrode plate 350 </ b> A and the cathode side electrode plate 350 </ b> B configured as described above are also arranged facing each other with the insulating member 500 (see FIG. 4) interposed in the case 200. The insulating member 500 is made of insulating paper, an insulating film made of synthetic resin, or the like. As shown in FIG. 4, the overlapping region S1, where the anode-side external connection convex pieces 310A and 320A and the cathode-side external connection convex pieces 310B and 320B overlap. A region 510 corresponding to S2 and S3, a region 520 corresponding to an overlapping region S4 between the anode side connecting portion 330A and the cathode side connecting portion 330B, and an overlapping region between the anode side electrode plate 350A and the cathode side electrode plate 350B. And a region 530 interposed therebetween.

  It is preferable that the areas 510, 520, and 530 corresponding to the overlapping areas in the insulating member 500 have a slightly larger size than the corresponding overlapping areas. For example, as shown in FIG. 1, the region 510 corresponding to the overlapping region of the anode-side external connection convex pieces 310A and 320A and the cathode-side external connection convex pieces 310B and 320B has an upper end portion of the overlapping regions S1, S2, and S3. It has a size that protrudes slightly from the side edge. Further, the region 520 interposed in the overlapping region between the anode side connecting portion 330A and the cathode side connecting portion 330B protrudes slightly upward from the upper end of the overlapping region between the anode side connecting portion 330A and the cathode side connecting portion 330B. It has become the size. By doing so, the creepage distance between the anode-side overlap region and the cathode-side overlap region can be increased as much as possible, thereby improving the pressure resistance.

  That is, if the creepage distance is too short, there may remain a problem that pressure resistance is inferior due to factors such as condensation, dust, salinity and vibration. For example, as an example of the overlapping region S1 (the anode-side overlapping region 312A and the cathode-side overlapping region 312B) between the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B in FIG. If the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B have the same size, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B is substantially equivalent to the thickness of the insulating member 500. Will be.

  For this reason, the creeping distance between the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B is at most about 1 mm to 3 mm, and the above-described problems may remain. On the other hand, by making the sizes of the regions 510, 520, and 530 interposed in the overlapping regions in the insulating member 500 slightly larger than the corresponding overlapping regions, the anode-side overlapping region and the cathode-side overlapping region The creepage distance between can be increased as much as possible.

  As in the case of the anode side electrode plate 350A and the cathode side electrode plate 350B, in the capacitor module 10 according to the first embodiment, the insulating member 500 is bent 90 degrees in the case 200 at the one-dot chain line portion α1 in FIG. FIG. 2 shows a state where it is not bent.

  The anode side electrode plate 350A is connected to the anode side of a plurality of film capacitor elements (not shown) in the case 200, and the cathode side electrode plate 350B is also a plurality of film capacitor elements (not shown). Is connected to the cathode side. The case 200 is filled with resin, and the plurality of film capacitor elements, the anode side electrode plate 350A, the cathode side electrode plate 350B, and the like are resin-molded.

  On the other hand, the anode-side external connection region 311A in the anode-side external connection convex piece 310A and the cathode-side external connection region 311B in the cathode-side external connection convex piece 310B are the corresponding anode-side terminal portion and cathode of the external module (not shown). Connected to the side terminal. Further, the anode side external connection region 321A in the anode side external connection convex piece 320A and the cathode side external connection region 321B in the cathode side external connection convex piece 320B also correspond to the corresponding anode side terminal portion and cathode in the external module (not shown). Connected to the side terminal. Specifically, the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B are respectively formed with connection holes h, and the connection holes h provide contact anode side elements corresponding to the external modules. After being engaged with the protrusions of the terminal and the cathode side terminal portion, they are connected by screws or the like.

  In FIG. 3, it is assumed that the anode side terminal portion and the cathode terminal portion of the external module are present at the lower position in the figure. The anode-side terminal portion and the cathode terminal portion of the external module are on a plane parallel to a plane (xz plane) formed by the x-axis and the z-axis in FIG. 3 (this is referred to as “external module terminal plane”). Is present.

  On the other hand, in the capacitor module 10 according to the first embodiment, the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B are the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B. When the lower surface in the drawing is a connection surface for the anode side terminal portion and the cathode terminal portion of the external module, the connection surfaces in the anode side external connection regions 311A and 321A and the connection surfaces in the cathode side external connection regions 311B and 321B are: Each exists on a different plane (a stepped plane).

  That is, if the connection surfaces in the anode-side external connection regions 311A and 321A exist on the first plane L1, the connection surfaces in the cathode-side external connection regions 311B and 321B exist on the second plane L2 that is different from the first plane L1. To do.

  Therefore, for example, when the anode side external connection regions 311A and 321A are brought into surface contact with the anode side terminal portion of the external module, the cathode side external connection regions 311B and 321B are on the anode side with respect to the cathode side terminal portion of the external module. The external connection convex pieces 310A and 320A are separated from each other by a thickness t1 obtained by adding the thickness of the insulating member 500 to the thickness of the external connection convex pieces 310A and 320A. In order to cope with this, the conductive spacer (not shown) corresponding to the thickness t1 is interposed between the cathode-side external connection regions 311B and 321B and the cathode-side terminal portion of the external module. Stop it. The spacer may be attached to the external connection region (in this case, the cathode-side external connection regions 311B and 321B) on the side separated from the beginning.

  As described above, in the capacitor module 10 according to the first embodiment, the anode-side external connection terminal portion 300A and the cathode-side external connection terminal portion 300B are the anode-side external connection convex pieces 310A and 320A and the cathode-side external connection convex piece 310B. 320B and the plate-like anode-side connecting portion 330A that connects the base portions of the anode-side external connection convex pieces 310A and 320A to each other, and the base portions of the cathode-side external connection convex pieces 310B and 320B are connected to each other. And a plate-like cathode-side connecting portion 330B.

  The anode-side overlapping region 312A in the anode-side external connection convex piece 310A belonging to one set (first set) and the cathode-side overlapping region 312B in the cathode-side external connection convex piece 310B are arranged so as to overlap each other. In addition, the anode-side overlapping region 322A in the anode-side external connection convex piece 320A belonging to the other group (second set) and the cathode-side overlapping region 322B in the cathode-side external connection convex piece 320B are arranged so as to overlap each other. . Also, in the groups adjacent to each other, the anode-side overlapping region 323A and the other group (referred to as the first set) in the anode-side external connection convex piece 320A belonging to one adjacent group (referred to as the second set). And the cathode side overlapping region 313B of the cathode side external connection convex piece 310B belonging to the above are disposed so as to overlap each other.

  Further, the anode side connecting portion 330A and the cathode side connecting portion 330B are disposed so as to overlap almost the entire surface. Further, an anode-side extension region 340A extends from the root portion of the anode-side overlap region 322A, and a cathode-side extension region 340B extends from the root portion of the cathode-side overlap region 312B. The anode-side extension region 340A and the cathode-side external connection region 321B are arranged with an overlap, and the cathode-side extension region 340B and the anode-side external connection region 311A are arranged with an overlap.

  Since the anode-side external connection terminal portion 300A and the cathode-side external connection terminal portion 300B have such a structure, according to the capacitor module 10 according to the first embodiment, the anode-side external connection terminal portion 300A and the cathode-side external connection terminal portion 300B Since a wide area of the connection terminal portion 300B is arranged with an overlapping area, the effect of reducing inductance generated in the anode side external connection terminal portion 300A and the cathode side external connection terminal portion 300B can be further increased. it can.

  Moreover, in the capacitor module 10 according to the first embodiment, the anode side external connection terminal portion 300A and the cathode side external connection terminal portion 300B as a whole have a wide area. The heat generation of the external connection convex pieces 310A and 310B and the cathode side external connection convex pieces 310B and 320B can be suppressed, and by increasing the area, the heat dissipation is excellent and the mechanical strength is also increased. The effect that it can do is also acquired.

[Embodiment 2]
FIG. 5 is a schematic diagram illustrating an arrangement of the anode side external connection terminal portion 300A and the cathode side external connection terminal portion 300B in the capacitor module 20 according to the second embodiment. FIG. 5 is a diagram corresponding to FIG. 3, and the same components as those in FIG. In FIG. 5 also, it is assumed that the anode side terminal portion and the cathode terminal portion of the external module are present at the lower position in the drawing.

  As shown in FIG. 5, the capacitor module 20 according to the second embodiment includes a connection surface of each anode-side external connection region 311A, 321A and each cathode-side external connection convex piece 310B in each anode-side external connection convex piece 310A, 320A. , 320B are arranged such that the connection surfaces of the cathode-side external connection regions 311B, 321B are substantially on the same plane L3. In order to obtain such a configuration, it is necessary to bend the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B. Such processing can be easily performed by, for example, a press processing apparatus. It is feasible.

  In the case of the capacitor module 20 according to the second embodiment, the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B are bent so that the anode-side external connection regions 311A and 321A and the cathode When the plane L3 of the side external connection areas 311B and 321B is used as a reference, the overlapping areas S1, S2, and S3 protrude from the plane L3 in the illustrated vertical direction (direction along the y axis).

  For this reason, when the anode-side terminal portion and the cathode-side terminal portion in the external module are present on a single flat plate, the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B are externally connected. When trying to contact the anode side terminal part and the cathode side terminal part in the module, the anode side external connection areas 311A and 321A and the cathode side external connection areas 311B and 321B are the anode side terminal part and cathode side terminal part in the external module. It will be separated from.

  In such a case, the thickness t2 corresponding to the amount of protrusion of the overlapping regions S1, S2, S3 with respect to the anode side external connection regions 311A, 321A and the cathode side external connection regions 311B, 321B (see FIG. 5). A conductive spacer (not shown) having a gap between the anode side external connection regions 311A and 321A and the cathode side external connection regions 311B and 321B and the anode side terminal portion and the cathode side terminal portion of the external module is interposed. And screw it.

  In addition, when a space exists between the anode side terminal portion and the cathode side terminal portion in the external module, each overlapping region S1, S2, S3 is formed between the anode side terminal portion and the cathode side terminal portion in the external module. If it is located in the space between, the anode side external connection regions 311A and 321A and the cathode side external connection regions 311B and 321B are connected to the anode side terminal portion and the cathode side terminal portion in the external module without using a spacer or the like. be able to.

[Modification of Embodiment 2]
FIG. 6 is a diagram illustrating a first modification of the capacitor module 20 according to the second embodiment.
FIG. 7 is a diagram illustrating a second modification of the capacitor module 20 according to the second embodiment.
6 and 7, it is assumed that the anode side terminal portion and the cathode side terminal portion of the external module are present at the lower position in the drawing. A first modification of the capacitor module 20 according to the second embodiment will be described as a capacitor module 21, and a second modification of the capacitor module 20 according to the second embodiment will be described as a capacitor module 22.

  Similarly to the capacitor module 20 according to the above-described embodiment, the capacitor module 21 as the first modification of the second embodiment and the capacitor module 22 as the second modification are also anode-side external connection regions 311A and 321A and cathode-side external connection region 311B. , 321B are arranged in substantially the same plane L3.

  First, a capacitor module 21 as a first modification of the second embodiment will be described. As shown in FIG. 6, the capacitor module 21 as a first modification of the third embodiment is not bent on one of the external connection terminals (the anode side external connection convex pieces 310 </ b> A and 320 </ b> A). The anode-side external connection region 311A, the anode-side overlapping region 312A, the anode-side external connection region 321A, and the anode-side overlapping regions 322A and 323A exist on substantially the same plane L3. On the other hand, in the other external connection terminal (the cathode side external connection convex pieces 310B and 320B), the cathode side external connection regions 311B and 321B are on the same plane L3 as the anode side external connection regions 311A and 321A. It is bent.

  According to the capacitor module 21 as the first modification of the second embodiment, as shown in FIG. 6, the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B are formed on the anode side in the external module. The surface on the side facing the terminal portion and the cathode-side terminal portion exists on substantially the same plane L3. That is, in order from the left side of FIG. 6, the anode side external connection region 311A, the anode side overlapping region 312A, the cathode side external connection region 311B, the anode side overlapping region 323A, the anode side external connection region 321A, the anode side overlapping region 322A, and the cathode side The external connection region 321B exists on substantially the same plane L3. For this reason, the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B can be connected to the anode-side terminal portion and the cathode-side terminal portion of the external module as they are without requiring a spacer or the like.

  Next, a capacitor module 22 as a second modification of the second embodiment will be described. As shown in FIG. 7, the capacitor module 22 as a second modification of the third embodiment includes anode-side external connection regions 311A and 321A and cathode-side external connection projections 310B in the anode-side external connection projections 310A and 310B. 320B, the cathode-side external connection regions 311B and 321B exist on substantially the same plane L3, and the overlapping regions S1, S2, and S3 are the anode-side terminal portion or cathode-side terminal portion of the external circuit module. The anode side external connection regions 311A and 321A and the cathode side external connection regions 311B and 321B are bent so as to be separated from each other.

  With such a configuration, as shown in FIG. 7, the anode-side external connection convex pieces 310A and 320A and the cathode-side external connection convex pieces 310B and 320B are formed on the anode-side terminal portion and the cathode-side terminal portion in the external module. The faces facing each other exist on substantially the same plane L3. That is, in order from the left side of FIG. 7, the anode-side external connection region 311A, the cathode-side external connection region 311B, the anode-side external connection region 321A, and the cathode-side external connection region 321B exist on substantially the same plane L3. For this reason, the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B can be connected to the anode-side terminal portion and the cathode-side terminal portion of the external module as they are without requiring a spacer or the like.

  In addition, the overlapping region (anode-side overlapping regions 312A, 323A, 322A) directly facing the anode-side terminal portion and the cathode-side terminal portion of the external module is in relation to the anode-side terminal portion or the cathode-side terminal portion of the external module. Since the anode-side external connection regions 311A and 321A and the cathode-side external connection regions 311B and 321B are connected to the anode-side terminal portion and the cathode-side terminal portion in the external module because they are separated, the anode-side terminal portion of the external module A gap t3 is formed between the overlapping region directly facing the cathode side terminal portion and the anode side terminal portion or cathode side terminal portion of the external module.

  For this reason, for example, if there is any member (for example, creepage) between the overlapping region directly facing the anode side terminal part or the cathode side terminal part of the external module and the anode side terminal part or the cathode side terminal part of the external module. Even when a member for increasing the distance is interposed, a member for increasing the creeping distance (referred to as a creeping distance extending member) can be accommodated in the gap. As a result, when the connection surfaces of the anode-side external connection regions 311A and 321A and the connection surfaces of the cathode-side external connection regions 311B and 321B are brought into contact with the anode-side terminal portion and the cathode-side terminal portion of the external module, The presence can be prevented from getting in the way.

[Embodiment 3]
The capacitor module according to the third embodiment more positively improves the pressure resistance in the overlapping regions S1, S2, and S3 of the anode-side external connection convex pieces 310A and 320A and the cathode-side external connection convex pieces 310B and 320B. Is.

  Hereinafter, the capacitor module according to Embodiment 3 will be described. In the capacitor module according to the third embodiment, the creeping surface for increasing the creeping distance in the overlapping regions S1, S2, and S3 of the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B. The point which provided the distance extension member differs from said each embodiment.

  In addition, it is applicable in all the above-mentioned embodiments that the creeping distance extending member is provided in the overlapping regions S1, S2, and S3 of the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B. However, the case where it applies to the 2nd modification (condenser module 22) in the capacitor module 10 concerning Embodiment 1, the capacitor module 20 concerning Embodiment 2, and the capacitor module concerning Embodiment 2 is explained here.

  For example, if the creeping distance extending member is an anode side overlapping region 312A and a cathode side overlapping region 312B, the side end and upper end of the anode side overlapping region 312A, the side end of the anode side overlapping region 312A, and Continuing from at least a part of the outer surface of the anode side overlapping region 312A continuous from the upper end, the side end and upper end of the cathode side overlapping region 312B, and the side end and upper end of the cathode side overlapping region 312B The cathode side overlapping region 312B is provided so as to cover at least a part of the outer surface and to be interposed between the anode side overlapping region 312A and the cathode side overlapping region 312B.

  Hereinafter, specific examples will be described as the first aspect, the second aspect, and the third aspect of the capacitor module according to the third embodiment.

  FIG. 8 is a diagram for explaining a first aspect of the capacitor module according to the third embodiment. The first mode of the capacitor module according to the third embodiment will be described as “the capacitor module 31 of the first mode” or simply “the capacitor module 31”.

  Since the basic configuration of the capacitor module 31 of the first aspect is the same as that of the capacitor module 10 according to the first embodiment, the external configuration and the like are not shown. 8 corresponds to FIG. 3, and the same parts as those in FIG. 3 are denoted by the same reference numerals.

  In the third embodiment, a case where the creeping distance extending member is formed in a cap shape from a synthetic resin and a case where the creeping distance extending member is formed of a bendable insulating plate such as insulating paper will be described. . Here, the creeping distance extending member formed in a cap shape is referred to as a “first creeping distance extending member 610”, and the creeping distance extending member formed of a foldable insulating plate is referred to as a “second creeping distance extending member 620”. Will be described. The same applies to the second aspect of the capacitor module according to Embodiment 3 and the third aspect of the capacitor module according to Embodiment 3 described later.

  FIG. 8A shows a case where a cap-shaped first creeping distance extending member 610 is provided in the overlapping regions S1, S2, and S3. This will be described by taking the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) as an example.

  In order to form the cap-shaped first creeping distance extending member 610 in the overlapping region S1, a method of resin-molding the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) can be employed. As described above, the first creeping distance extending member 610 can be similarly provided in the overlapping regions S2 and S3.

  In addition, a plurality of insulating caps that can individually cover the overlapping regions S1, S2, and S3 are manufactured in advance, and when the capacitor module 31 is connected to the external module, each overlapping region S1 is connected with each insulating cap. , S2 and S3 may be individually covered.

  8A is a cross-sectional view (a cross-sectional view taken along the line aa in FIG. 1), similar to FIG. 3, the front end portion of the overlapping region is not shown, but the first creeping distance extending member 610 is not shown. Preferably, the entire overlapping regions S1, S2, and S3 are individually covered including the upper ends of the individual overlapping regions S1, S2, and S3.

  By providing the first creeping distance extending member 610 as shown in FIG. 8A in the overlapping regions S1, S2, and S3, the creeping distance between the anode side overlapping region and the cathode side overlapping region can be increased. . For example, taking the overlapping region S1 of the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B as an example, the creepage distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B is as shown in FIG. ), The distance along the outer periphery of the first creeping distance extending member 610 is indicated by a broken line C1 in FIG.

  For this reason, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B can be made significantly longer than when the first creeping distance extending member 610 is not present. Thereby, it is possible to solve the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration. The same applies to the other overlapping regions S2 and S3.

  FIG. 8B shows a case where the second creeping distance extending member 620 formed of an insulating member such as a foldable insulating paper is provided in the overlapping regions S1, S2, and S3. This will be described by taking the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) as an example. The second creeping distance extension member 620 formed of an insulating member such as insulating paper is formed integrally with the region 510 corresponding to the overlapping regions S1, S2, and S3 in the insulating member 500 shown in FIG. can do.

  As shown in FIG. 8B, an insulating plate as the second creeping distance extending member 620 is sandwiched between the anode side overlapping region 312A and the cathode side overlapping region 312B, and the side end portion of the anode side overlapping region 312A and After covering the side edge of the cathode-side overlapping region S1B, it is folded back approximately 180 degrees so as to be along the outer surfaces of the anode-side overlapping region 312A and the cathode-side overlapping region 312B, respectively. At this time, the insulating plate as the second creepage distance extending member 620 may be in close contact with the outer surfaces of the anode side overlapping region 312A and the cathode side overlapping region 312B, as shown in FIG. 8B. As such, some gaps may exist. Such a second creepage distance extending member 620 can be similarly provided in the overlapping regions S2 and S3.

  8B is also a cross-sectional view (a-a cross-sectional view taken along the line aa in FIG. 1) as in FIG. 3, and the tip portions of the overlapping regions S <b> 1, S <b> 2, S <b> 3 are not shown. The creeping distance extending member 620 is preferably provided so as to protrude further upward by a predetermined amount from the tip of the overlapping region to cover the upper end.

  By providing the second creeping distance extending member 620 as shown in FIG. 8B in each overlapping region S1, S2, S3, the creeping distance between the anode side overlapping region and the cathode side overlapping region can be increased. it can. For example, taking the overlapping region S1 of the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B as an example, the creepage distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B is as shown in FIG. ), The distance along the outer periphery of the second creeping distance extending member 620 is indicated by a broken line C2.

  For this reason, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B can be made significantly longer than when the second creeping distance extending member 620 is not present. Thereby, it is possible to solve the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration. The same applies to the other overlapping regions S2 and S3.

  FIG. 9 is a diagram for explaining a second mode of the capacitor module according to the third embodiment. The second aspect of the capacitor module according to the third embodiment will be described as “the capacitor unit 32 of the second aspect” or simply “the capacitor module 32”.

  Since the basic configuration of the capacitor module 32 of the second aspect is the same as that of the capacitor module 20 according to the second embodiment, the external configuration and the like are not shown. 9 corresponds to FIG. 5, and the same parts as those in FIG. 5 are denoted by the same reference numerals.

  FIG. 9A shows a case where a cap-shaped first creeping distance extending member 610 is provided in the overlapping regions S1, S2, and S3 as in FIG. 8A. This will be described by taking the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) as an example.

  In order to form the cap-shaped first creeping distance extending member 610 in the overlapping region S1, the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) is resin-molded in the same manner as the capacitor module 32 of the second mode. The method to do can be adopted. Such a first creeping distance extending member 610 can be similarly provided in the overlapping regions S2 and S3.

  In addition, a plurality of insulating caps that can individually cover the overlapping regions S1, S2, and S3 are manufactured in advance, and when connecting the capacitor module 32 of the second mode to the external module, You may make it cover each overlap area | region S1, S2, S3 separately.

  9A is a cross-sectional view (a cross-sectional view taken along the line aa in FIG. 1), as in FIG. 5, the front end portion of the overlapping region is not shown, but the first creeping distance extending member 610 is not shown. Preferably, the entire overlapping regions S1, S2, and S3 are individually covered including the upper ends of the individual overlapping regions S1, S2, and S3.

  By providing the first creeping distance extending member 610 as shown in FIG. 9A in the overlapping regions S1, S2, and S3, the creeping distance between the anode side overlapping region and the cathode side overlapping region can be increased. . For example, taking the overlapping region S1 of the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B as an example, the creepage distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B is as shown in FIG. ), The distance along the outer periphery of the first creeping distance extending member 610 is indicated by a broken line C1 in FIG.

  For this reason, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B can be made significantly longer than when the first creeping distance extending member 610 is not present. Thereby, it is possible to solve the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration. The same applies to the other overlapping regions S2 and S3.

  FIG. 9B shows a case where the second creeping distance extending member 620 formed of a foldable insulating plate is provided in the overlapping regions S1, S2, and S3. This will be described by taking the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) as an example.

  As shown in FIG. 9B, an insulating plate as the second creeping distance extending member 620 is sandwiched between the anode side overlapping region 312A and the cathode side overlapping region 312B, and the side end portion of the anode side overlapping region 312A and After covering the side edge of the cathode-side overlapping region S1B, it is folded back approximately 180 degrees so as to be along the outer surfaces of the anode-side overlapping region 312A and the cathode-side overlapping region 312B, respectively. At this time, the insulating plate as the second creepage distance extending member 620 may be in close contact with the outer surfaces of the anode side overlapping region 312A and the cathode side overlapping region 312B, as shown in FIG. 8B. As such, some gaps may exist. Such a second creepage distance extending member 620 can be similarly provided in the overlapping regions S2 and S3.

  Note that FIG. 9B is also a cross-sectional view (a-a arrow cross-sectional view in FIG. 1) as in FIG. 5, and thus the tip portions of the overlapping regions S <b> 1, S <b> 2, S <b> 3 are not shown. The creeping distance extending member 620 is preferably provided so as to protrude further upward by a predetermined amount from the tip of the overlapping region to cover the upper end.

  By providing the second creeping distance extending member 620 as shown in FIG. 9B in each overlapping region S1, S2, S3, the creeping distance between the anode side overlapping region and the cathode side overlapping region can be increased. it can. For example, taking the overlapping region S1 of the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B as an example, the creepage distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B is as shown in FIG. ), The distance along the outer periphery of the second creeping distance extending member 620 is indicated by a broken line C2.

  For this reason, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B can be made significantly longer than when the second creeping distance extending member 620 is not present. Thereby, it is possible to solve the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration. The same applies to the other overlapping regions S2 and S3.

  FIG. 10 is a diagram for explaining a third aspect of the capacitor module according to the third embodiment. The third mode of the capacitor module according to the third embodiment will be described as “the capacitor unit 33 of the third mode” or simply “the capacitor module 33”.

  Since the basic configuration of the capacitor module 33 of the third aspect according to the third embodiment is the same as that of the capacitor module 20 according to the second embodiment, the external configuration and the like are not shown. 10 corresponds to FIG. 7, and the same parts as those in FIG. 7 are denoted by the same reference numerals.

  FIG. 10A shows a case where a cap-shaped first creeping distance extending member 610 is provided in the overlapping regions S1, S2, and S3 as in FIG. 8A. This will be described by taking the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) as an example.

  In order to form the cap-shaped first creeping distance extending member 610 in the overlapping region S1, a method of resin-molding the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) can be employed. Such a first creeping distance extending member 610 can be similarly provided in the overlapping regions S2 and S3.

  In addition, a plurality of insulating caps that can individually cover the overlapping regions S1, S2, and S3 are manufactured in advance, and when the capacitor module 31 is connected to the external module, each overlapping region S1 is connected with each insulating cap. , S2 and S3 may be individually covered.

  10A is a cross-sectional view (a cross-sectional view taken along the line aa in FIG. 1) similarly to FIG. 7, and therefore, the tip portion of the overlapping region is not shown, but the first creeping distance extending member 610 is not shown. Preferably, the entire overlapping regions S1, S2, and S3 are individually covered including the upper ends of the individual overlapping regions S1, S2, and S3.

  By providing the first creeping distance extending member 610 as shown in FIG. 10A in the overlapping regions S1, S2, and S3, the creeping distance between the anode side overlapping region and the cathode side overlapping region can be increased. . For example, taking the overlapping region S1 of the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B as an example, the creepage distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B is as shown in FIG. ), The distance along the outer periphery of the first creeping distance extending member 610 is indicated by a broken line C1 in FIG.

  For this reason, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B can be made significantly longer than when the first creeping distance extending member 610 is not present. Thereby, it is possible to solve the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration. The same applies to the other overlapping regions S2 and S3.

  FIG. 10B shows a case where the second creeping distance extending member 620 formed of a foldable insulating plate is provided in the overlapping regions S1, S2, and S3. This will be described by taking the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) as an example.

  As shown in FIG. 10B, an insulating plate as the second creeping distance extending member 620 is sandwiched between the anode side overlapping region 312A and the cathode side overlapping region 312B, and the side end portion of the anode side overlapping region 312A and After covering the side edge of the cathode-side overlapping region S1B, it is folded back approximately 180 degrees so as to be along the outer surfaces of the anode-side overlapping region 312A and the cathode-side overlapping region 312B, respectively. At this time, the insulating plate as the second creeping distance extending member 620 and the outer surfaces of the anode side overlapping region 312A and the cathode side overlapping region 312B may be in close contact with each other, as shown in FIG. As such, some gaps may exist. Such a second creepage distance extending member 620 can be similarly provided in the overlapping regions S2 and S3.

  Note that FIG. 10B is also a cross-sectional view (cross-sectional view taken along the line aa in FIG. 1) as in FIG. 7, and thus the tip portions of the overlapping regions S1, S2, and S3 are not shown. The creeping distance extending member 620 is preferably provided so as to protrude further upward by a predetermined amount from the tip of the overlapping region to cover the upper end.

  By providing the second creeping distance extending member 620 as shown in FIG. 10B in each overlapping region S1, S2, S3, the creeping distance between the anode side overlapping region and the cathode side overlapping region can be increased. it can. For example, taking the overlapping region S1 of the anode-side external connection convex piece 310A and the cathode-side external connection convex piece 310B as an example, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B is as shown in FIG. ), The distance along the outer periphery of the second creeping distance extending member 620 is indicated by a broken line C2.

  For this reason, the creeping distance between the anode-side overlapping region 312A and the cathode-side overlapping region 312B can be made significantly longer than when the second creeping distance extending member 620 is not present. Thereby, it is possible to solve the problem that the pressure resistance is inferior due to factors such as dew condensation, dust, salinity and vibration. The same applies to the other overlapping regions S2 and S3.

  Note that the capacitor module 33 according to the third aspect not only provides the above-described effects, but also has the same basic configuration as the capacitor module 20 according to the second embodiment. When connecting the external module to the anode side connection terminal and the cathode side connection terminal of the external module, it is possible to prevent the presence of the first creepage distance extension member 610 or the second creepage distance extension member 620 from being obstructive. can get.

  That is, when the capacitor module 33 is connected to the anode-side connection terminal and the cathode-side connection terminal of the external module, a gap t3 is provided between the anode-side overlapping regions 312A, 322A, 323A and the anode-side connection terminal of the external module. (See FIG. 7). For this reason, by setting the thickness of the first creepage distance extension member 610 or the second creepage distance extension member 620 to be within the gap t3, the first creepage distance extension member 610 or the second creepage distance extension member 620 When the capacitor module 33 is connected to the anode-side connection terminal and the cathode-side connection terminal of the external module, the first creeping distance extending member 610 or the protrusion 610 is not protruded from the anode-side overlapping regions 312A, 322A, 323A. The second creepage distance extending member 620 does not get in the way.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, the following modifications are possible.

  (1) In each of the above embodiments, a capacitor module provided with two pairs of anode-side external connection convex pieces and cathode-side external connection convex portions is shown as an example. However, the present invention is not limited to this, and a pair is formed. The present invention can also be applied to a capacitor module in which three or more sets of anode side external connection protrusions and cathode side external connection protrusions are provided.

  (2) In the third embodiment, in the capacitor module in which a plurality of pairs of anode-side external connection convex pieces and cathode-side external connection convex portions are provided, individual overlapping regions (anode-side overlapping region and cathode-side overlapping region) ), The first creeping distance extending member 610 or the second creeping distance extending member 620 is illustrated as an example. However, the present invention is not limited to this, and a pair of anode-side external connection convex pieces and cathode-side external connection convex pieces are provided. It can be applied to only one set of capacitor modules.

  That is, a case for storing the capacitor element, a plate-like anode-side external connection terminal portion for connecting to the anode-side terminal portion and the cathode-side terminal portion of the external module, and a plate-like shape provided to protrude outside the case. A capacitor module having a cathode side external connection terminal portion, wherein the anode side external connection terminal portion has an anode side external connection convex piece, and the cathode side external connection terminal portion has a cathode side external connection convex piece. The anode-side external connection convex piece has an anode-side external connection region connected to the anode-side terminal portion of the external module, and an anode overlapping with a part of the cathode-side external connection convex piece via an insulating member A cathode-side external connection convex portion connected to the cathode-side terminal portion of the external module; and the anode-side overlap region of the anode-side external connection convex piece. In A cathode-side overlap region overlapping with the edge member, and the anode-side external connection convex piece and the anode-side external connection convex piece are arranged so that the anode-side overlap region and the cathode-side overlap region overlap each other. In addition, the anode side overlapping region and the cathode side overlapping region are provided with insulating creeping distance extending members for increasing the creeping distance between the anode side overlapping region and the cathode side overlapping region. It may be a capacitor module having a configuration such as that described above.

  (3) In the third embodiment, the first creeping distance extending member 610 and the second creeping distance extending member 620 cover the entire outer surface of the anode side overlapping region and the cathode side overlapping region. A part of the outer surface of the region and the cathode side overlapping region may be used instead of the entire outer surface. However, even when a part of the region is covered, it is continuously covered from the side end portions of the anode side overlapping region and the cathode side overlapping region.

  (4) In each of the above embodiments, an insulating member is interposed between the anode side overlapping region and the cathode side overlapping region and between the anode side connecting portion and the cathode side connecting portion. The member may be provided with a conductive member that is electrically disconnected from the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B inside the insulating member. Good.

  FIG. 11 shows a case where a conductive member 550 that is electrically disconnected from the anode side external connection convex pieces 310A and 320A and the cathode side external connection convex pieces 310B and 320B is provided inside the insulating member. It is a figure shown in order to demonstrate. FIG. 11 is an enlarged view showing a portion of the overlapping region S1 (the anode side overlapping region 312A and the cathode side overlapping region 312B) in FIG.

  As shown in FIG. 11, anode-side external connection convex pieces 310A and 320A and cathode-side external connection convex pieces are disposed inside the insulating member 500 interposed between the anode-side overlap area 312A and the cathode-side overlap area 312B. A conductive member 550 that is electrically disconnected from 310B and 320B is provided.

  It has been experimentally confirmed that by providing such a conductive member 550 inside the insulating member 500, the effect of reducing inductance is further enhanced. Thereby, even if the space | interval of an anode side overlapping area | region and a cathode side overlapping area | region is enlarged to some extent, the reduction effect of an inductance is acquired. For this reason, even if the interval between the anode side overlapping region and the cathode side overlapping region is set to be large to some extent (for example, about several mm to several tens of mm), the effect of reducing the inductance can be obtained. As described above, when the effect of reducing inductance is obtained and the interval between the anode-side overlap region and the cathode-side overlap region can be set to a certain extent, the anode-side external connection convex piece and the cathode-side external connection convex piece are This is advantageous in terms of insulation between them.

  In FIG. 11, the overlapping area S1 (the anode-side overlapping area 312A and the cathode-side overlapping area 312B) in FIG. 3 has been described, but the same configuration can be applied to other overlapping areas.

  (5) In the above embodiments, the capacitor element has been described as a film capacitor element. However, the capacitor element is not limited to a film capacitor element, and can be applied to other capacitor elements.

  DESCRIPTION OF SYMBOLS 10 ... Capacitor module which concerns on Embodiment 1, 11 ... Modification of capacitor module which concerns on Embodiment 1, 20 ... Capacitor module which concerns on Embodiment 1, 21 ... 1st modification of Embodiment 2 Capacitor module as an example, 22... Capacitor module as a second modification of the second embodiment, 31... Capacitor module of the first aspect according to the third embodiment, 32. Capacitor module of aspect, 33... Capacitor module of third aspect according to Embodiment 3, 300... External connection terminal portion, 300A... Anode side external connection terminal portion, 300B. 310A, 320A ... anode side external connection convex piece, 310B, 320B ... cathode side external connection convex piece, 311A, 321 ... Anode-side external connection region, 311B, 321B ... Cathode-side external connection region, 330A ... Anode-side connection portion, 330B ... Cathode-side connection portion, 340A ... Anode-side extension region, 340B ... Cathode side connection region, 350A ... anode side electrode plate (anode side bus bar), 350B ... cathode side electrode plate (cathode side bus bar), 400A ... anode side input terminal, 400B ... cathode side input terminal 500, insulating member, h, connection hole, S1, S2, S3, overlapping region, 312A, 322A, S323A, anode side overlapping region, 312B, 322B, 323B, cathode side overlapping Region, 500... Insulating member, 550... Conductive member provided inside the insulating member

Claims (10)

A case for storing the capacitor element, and a plate-like anode-side external connection terminal portion and a plate-like cathode side provided to protrude outside the case and connected to the anode-side terminal portion and the cathode-side terminal portion of the external module A capacitor module having an external connection terminal,
The anode-side external connection terminal portion is an anode-side connection portion that connects n (n is an integer of 2 or more) anode-side external connection convex pieces and root portions of the n pieces of anode-side external connection convex pieces. And
The cathode-side external connection terminal portion includes n cathode-side external connection convex pieces and a cathode-side connection portion that interconnects root portions of the n cathode-side external connection convex pieces,
The n anode-side external connection convex pieces and the n cathode-side external connection convex pieces are a pair of the n anode-side external connection convex pieces and the n cathode-side external connection convex pieces, respectively. N sets of external connection convex pieces are formed,
Each of the anode side external connection convex pieces is an anode side external connection region connected to the anode side terminal portion of the external module and at least one cathode side external part of the n cathode side external connection convex pieces. An anode side overlapping region overlapping with a part of the connecting convex piece,
Each of the cathode side external connection convex pieces is a cathode side external connection region connected to the cathode side terminal portion of the external module, and at least one anode side external part of the n anode side external connection convex pieces. A cathode-side overlapping region that overlaps the anode-side overlapping region of the connecting convex piece,
The anode-side external connection convex piece and the cathode-side external connection convex piece belonging to each of the n sets have an overlap between each anode-side overlap region and each cathode-side overlap region belonging to the same set via an insulating member. The anode-side overlapping region of the anode-side external connection convex pieces belonging to one set adjacent to each other in the arrangement direction of the anode-side external connection convex pieces and the cathode-side external connection convex pieces And the cathode side overlapping region of the cathode side external connection convex piece belonging to the other set are arranged with an overlap through an insulating member, and the anode side connecting part and the cathode side connecting part are insulated A capacitor module, wherein the capacitor module is disposed so as to be almost entirely overlapped through a member. The capacitor module according to claim 1,
Of the n anode-side external connection convex pieces, the anode-side external connection convex pieces arranged so as to overlap with the cathode-side external connection convex pieces belonging to the adjacent set are the same set. Is formed wider than the anode side external connection convex piece arranged in an overlapping manner only with the cathode side external connection convex piece belonging to,
Of the n cathode-side external connection convex pieces, the cathode-side external connection convex pieces arranged so as to overlap with the anode-side external connection convex pieces belonging to the adjacent set are the same set. The capacitor module is characterized in that the width in the arrangement direction is wider than that of the cathode side external connection convex piece arranged so as to overlap only with the anode side external connection convex piece belonging to the above. The capacitor module according to claim 1 or 2,
An anode-side extension region serving as an extension of the connecting portion is provided at the root of the anode-side overlapping region in the anode-side external connection convex piece located on one end side in the arrangement direction of the n anode-side external connection convex pieces. It is formed to extend outward from the side overlap area,
In the arrangement direction of the n cathode side external connection convex pieces, an extension of the connecting portion is provided at the base portion of the cathode side overlapping region in the cathode side external connection convex piece located on the other end side opposite to the one end side. The cathode-side extended region is formed to extend outward from the cathode-side overlapping region,
The anode-side external connection located on the cathode-side extension region and the other end side, the anode-side extension region and the cathode-side external connection region located on the one end side being arranged with an overlap through an insulating member A capacitor module, wherein the region is disposed so as to overlap with an insulating member. In the capacitor module according to any one of claims 1 to 3,
The insulating member is provided with a conductive member that is electrically disconnected from the anode-side external connection convex piece and the cathode-side external connection convex piece inside the insulating member. Capacitor module. In the capacitor module according to any one of claims 1 to 4,
Each of the anode side external connection region and each of the cathode side external connection region is
The connection surface that contacts the anode-side terminal portion of the external module in each anode-side external connection region is substantially the same as the connection surface that contacts the cathode-side terminal portion of the external module in each cathode-side external connection region. A capacitor module, wherein at least one of the anode-side external connection region and the cathode-side external connection region is bent so as to be able to exist on a plane. In the capacitor module according to any one of claims 1 to 4,
Each of the anode side external connection region and each of the cathode side external connection region is
The connection surface that contacts the anode-side terminal portion of the external module in each anode-side external connection region is substantially the same as the connection surface that contacts the cathode-side terminal portion of the external module in each cathode-side external connection region. An overlapping region that can exist on a plane and directly faces the anode-side terminal portion or the cathode-side terminal portion of the external module among the anode-side overlapping regions and the cathode-side overlapping regions, The capacitor module, wherein the anode side external connection region and the cathode side external connection region are bent so as to be separated from the anode side terminal portion or the cathode side terminal portion of the external module. In the capacitor module according to any one of claims 1 to 6,
Each of the anode side overlapping regions and each of the cathode side overlapping regions is provided with an insulating creeping distance extending member for increasing the creeping distance between the anode side overlapping region and the cathode side overlapping region. Capacitor module characterized by The capacitor module according to claim 7,
The creeping distance extension member includes at least a part of an outer surface of the anode-side overlapping region continuous from the side end and the tip of each anode-side overlapping region and the side end and the tip of the anode-side overlapping region. And covering at least a part of the outer surface of the cathode side overlap region continuous from the side end and tip of the cathode side overlap region, and the side end and tip of each cathode side overlap region, A capacitor module, wherein the capacitor module is provided so as to be interposed between the anode side overlapping region and the cathode side overlapping region. The capacitor module according to claim 8,
The capacitor module according to claim 1, wherein the creeping distance extending member is formed in a cap shape by a synthetic resin material. The capacitor module according to claim 8,
The capacitor module according to claim 1, wherein the creeping distance extending member is formed of a bendable insulating member.

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