JP2019110156A - Capacitor - Google Patents

Abstract

To provide a capacitor that is able to efficiently cool both positive and negative electrode plates.SOLUTION: In a capacitor accommodating a capacitor element 2 and a pair of electrode plates 3, 4, positive and negative, in a case 5 and filled with resin 6, the positive and negative electrode plates 3, 4 respectively have pull-out parts 32, 42, which are pulled out of the resin 6. These pull-out parts 32, 42 overlap with each other. The pull-out part 32 of one of the electrode plates 3 has a contact part, which comes into contact with a discharge member 7 on an opposite side of the other electrode plate 4. The contact part is provided with an opening 32a1 and/or a notch 32a2 for bringing the pull-out part 42 of the other electrode plate 4 and a discharge member 7 into contact with each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a capacitor in which a capacitor element and an electrode plate are housed in a case and filled with resin.

  Patent Document 1 describes that while drawing out a part of the positive and negative electrode plates out of the resin, superposing the drawn out portions on one another and bringing a cooling means such as a heat sink into contact with the side of one of the electrode plates. It is done.

JP, 2016-119440, A

  By the way, in the case of the said structure, since a cooling means contact | abuts only to one electrode plate, the other electrode plate can not be cooled directly. So, in patent document 1, a heat conduction sheet is interposed between one electrode plate and the other electrode plate, and the heat of the other electrode plate is transmitted to the cooling means side. However, since the heat transfer is performed through the heat transfer sheet and one of the electrode plates, it is difficult to cool the other electrode plate in the same manner as the one electrode plate.

  Then, an object of this invention is to provide the capacitor | condenser which can cool an electrode plate of positive / negative both efficiently.

  The capacitor of the present invention is a capacitor in which the capacitor element 2 and the pair of positive and negative electrode plates 3 (3A) and 4 (4A) are accommodated in the case 5 and filled with the resin 6, and the positive and negative electrode plates 3 (3A) , 4 (4A) respectively have lead portions 32, 42 drawn out of the resin 6, and these lead portions 32, 42 overlap each other, and the lead portion 32 of one electrode plate 3 is the other electrode plate 4 On the opposite side of (4A), an abutment portion is provided which abuts on the heat dissipation member 7 (7A), and in this abutment portion, the lead-out portion 42 of the other electrode plate 4 (4A) and the heat dissipation member 7 (7A) It is characterized in that an opening 32a1 and / or a notch 32a2 for bringing the same into contact is provided.

  In addition, it is preferable that a protruding portion 42a1 to be in contact with the heat dissipation member 7 be provided in the lead-out portion 42 of the other electrode plate 4 through the opening 32a1 and / or the notch 32a2.

  In the capacitor of the present invention, an opening and / or a notch is provided in the contact portion of one of the electrode plates in contact with the heat dissipation member, for bringing the heat dissipation member into contact with the lead-out portion of the other electrode plate. Therefore, the other electrode plate can be brought into contact with the heat dissipation member, and both the positive and negative electrode plates can be efficiently cooled.

  In addition, if the protrusion of the other electrode plate is provided with a protrusion that contacts the heat dissipation member through the opening and / or the notch, the lead portion of the other electrode plate and the heat dissipation member can be simplified. It can be made to abut.

It is an exploded perspective view showing a capacitor concerning one embodiment of this invention. Similarly, it is a perspective view of the capacitor. It is an end elevation of the capacitor similarly. FIG. 7 is an end view of a capacitor according to a different embodiment of the present invention. It is a perspective view which shows the electrode plate which provided the notch part.

  Next, one embodiment of the capacitor of the present invention will be described in detail based on the drawings. A capacitor 1 according to the present invention, as shown in FIGS. 1 to 3, includes a plurality of capacitor elements 2, a pair of positive and negative electrode plates 3 and 4 commonly connecting the plurality of capacitor elements 2, a capacitor element 2 and respective electrodes A case 5 for containing the plates 3 and 4 and a resin 6 filled in the case 5 for sealing the capacitor element 2 and the electrode plates 3 and 4 are provided (the resin is used in FIGS. 1 and 2). Omitted). Hereinafter, each component will be described, but the concept of “upper and lower” in the description is at the time of manufacture, more specifically at the time of resin filling, and does not necessarily define the upper and lower sides at the time of use.

  The capacitor element 2 is, for example, a film capacitor formed by winding a metallized film in which a metal is vapor-deposited on the surface of an insulating film, and as shown in FIG. The electrode portions 2a and 2b are formed respectively. The capacitor element 2 has a flat shape as viewed from the axial direction, specifically, a substantially track shape (a shape in which two parallel lines and both ends are connected by a semicircle), and the flat portion 2c and the curved surface And 2d. A plurality of capacitor elements 2 are arranged side by side so that the flat portions 2c and 2c face each other, with the electrode portions 2a and 2b facing up and down, thereby forming a capacitor element group.

  The pair of positive and negative electrode plates 3 and 4 is made of, for example, a conductive plate (metal plate) such as a copper plate or an aluminum plate, and is disposed so as to sandwich the capacitor element 2 in the vertical direction. Hereinafter, the electrode plate located on the upper side of the capacitor element 2 is referred to as the first electrode plate 3, and the electrode plate located on the lower side of the capacitor element 2 is referred to as the second electrode plate 4. For positive and negative, for example, although the first electrode plate 3 is a negative electrode and the second electrode plate 4 is a positive electrode, they may be replaced.

  The first electrode plate 3 includes a substrate portion 31 facing the electrode portion 2 a on the upper side of the capacitor element 2, a lead-out portion 32 drawn to the outside of the case 5, and a connection portion 33 connecting the substrate portion 31 and the lead-out portion 32. ing.

  The substrate portion 31 has a substantially rectangular shape in plan view, and has a size that can substantially cover the electrode portion 2 a of each capacitor element 2. In addition, in the substrate portion 31, tongue-shaped connection pieces 31 a for connection with the electrode portions 2 a are provided at positions facing the electrode portions 2 a of the respective capacitor elements 2.

  The lead-out portion 32 is substantially L-shaped in side view, and includes a horizontal portion 32a and a vertical portion 32b extending upward from the edge of the horizontal portion 32a. The horizontal portion 32a has a substantially rectangular shape in plan view, and includes two openings 32a1 aligned in the longitudinal direction. The vertical portion 32b is provided with an external connection portion 32b1 provided on the upper end side thereof for connection with an external device (not shown).

  The connecting portion 33 rises from the long side of the substrate portion 31 and is connected to the long side of the horizontal portion 32 a of the lead-out portion 32 (the side opposite to the side where the vertical portion 32 b is extended). The lead portion 32 is pulled out of the resin 6 by the connecting portion 33.

  As shown in FIG. 1, the second electrode plate 4 has a substrate portion 41 facing the lower electrode portion 2 b of the capacitor element 2, a lead portion 42 drawn to the outside of the case 5, a base portion 41 and a lead portion 42. And a connecting portion 43 connecting the two. The substrate portion 41 has substantially the same shape as the substrate portion 31 of the first electrode plate 3. In addition, since the second electrode plate 4 of the connecting portion 43 is located below the capacitor element 2, the connecting portion 43 is only longer in the vertical direction. Also in the vertical portion 42b of the lead-out portion 42, the external connection portion 42b1 is merely disposed so as not to overlap the external connection portion 32b1 of the first electrode plate 3 as a whole. Therefore, the same suffixes are attached to these and detailed description will be omitted.

  The horizontal portion 42 a of the lead-out portion 42 is a convex portion protruding toward the first electrode plate 3 (upper side in the figure) at a position corresponding to the opening 32 a 1 provided in the horizontal portion 32 a of the first electrode plate 3. 42a1 is provided. The convex portion 42a1 has a size obtained by reducing the opening 32a1 by a size in plan view.

  The 1st electrode plate 3 and the 2nd electrode plate 4 of the above-mentioned composition are suitably manufactured by giving punching processing, bending processing, embossing processing, cutting and bending processing to one metal plate suitably. However, each part may be separately manufactured and integrated by welding or the like.

  The case 5 includes an accommodating portion 51 for accommodating the capacitor element 2 and the electrode plates 3 and 4 therein, and a guide portion 52 for guiding the horizontal portions 32 a and 42 a of the electrode plates 3 and 4. The housing 51 includes a case bottom 51a having a substantially rectangular shape in a plan view and a case side wall 51b erected from the four sides of the case bottom 51a, and a surface (upper surface side) facing the case bottom 51a. ) Is provided with an opening 51c. The guide portion 52 extends in the horizontal direction from the upper end of one of the side wall portions 51 b of the pair of side wall portions 51 b constituting the side wall in the longitudinal direction. Such case 5 is manufactured, for example, by integrally molding a synthetic resin. However, it may be manufactured by processing a metal plate. The resin 6 filled in the case 5 is, for example, an epoxy resin. However, not only this but urethane resin etc. may use well-known various resin.

  Next, a method of manufacturing the capacitor 1 will be described. First, as described above, a plurality of capacitor elements 2 are arranged to form a capacitor element group.

  Next, the electrode plates 3 and 4 and the capacitor element 2 are connected. Specifically, the connection piece 31a of the substrate portion 31 of the first electrode plate 3 and the upper electrode portion 2a of the capacitor element 2 are connected by soldering or the like. Further, the connection piece 41 a of the substrate portion 41 of the second electrode plate 4 and the lower electrode portion 2 b of the capacitor element 2 are connected by soldering or the like. At this time, the lead portions 32 and 42 or the connection portions 33 and 43 are arranged such that the lead portions 32 and 42 of the electrode plates 3 and 4 are positioned above the substrate portion 31 of the first electrode plate 3. Are made to overlap each other through the insulating layer (gap).

  When the lead portions 32, 42 overlap with each other, the convex portion 42a1 of the second electrode plate 4 located on the lower side becomes dew through the opening 32a1 of the first electrode plate 3 located on the upper side thereof. The upper surface of the convex portion 42a1 is substantially flush with the upper surface of the horizontal portion 32a of the first electrode plate 3 (see FIG. 3).

  Then, the integrated capacitor element 2 and the electrode plate are housed in the housing portion 51 of the case 5. Under the present circumstances, it accommodates so that the board | substrate part 41 of the 2nd electrode plate 4 may be located in the case bottom 51a side so that the board | substrate part 31 of the 1st electrode plate 3 may be located in the case opening 51c side. The lead portions 32 and 42 are positioned on the guide portion 52 of the case 5 such that the horizontal portion 32 a of the first electrode plate 3 is above the horizontal portion 42 a of the second electrode plate 4. Then, the resin 6 is filled in the housing portion 51 of the case 5 to complete the manufacture of the capacitor 1. The resin 6 embeds the capacitor elements 2 and the substrate portions 31 and 41 of the electrode plates and a part of the connecting portions 33 and 43. On the other hand, the lead portions 32 and 42 of the electrode plates 3 and 4 are located outside the resin 6.

  In the capacitor 1 configured as described above, since the lead portions 32, 42 are drawn out of the resin 6, as shown in FIG. 3, the outer surface of the lead portion 32, specifically, the horizontal portion 32a of the first electrode plate 3 The heat dissipation member 7 can be made to abut on the upper surface of the heat sink. That is, the horizontal portion 32 a of the first electrode plate 3 can be made to be an abutting portion that abuts the heat dissipation member 7. In addition, since the opening 32a1 is provided in the horizontal part 32a of the first electrode plate 3 and the projection 42a1 is provided in the second electrode plate 4 at a position corresponding to the opening 32a1, the first electrode plate When the heat dissipating member 7 abuts on the upper surface of the horizontal portion 32 a, the heat dissipating member 7 naturally abuts on the second electrode plate 4 through the opening 32 a 1 of the first electrode plate 3. Therefore, even if the case 5 includes the guide portion 52 and the horizontal portion 42a of the second electrode plate 4 does not face the outside, it is possible to efficiently cool both the electrode plates 3 and 4 . In addition, although the heat dissipation sheet (heat dissipation pad: equipped with insulation) which made resin high heat conductive resin, such as a silicone resin and an acrylic resin, for example as a sheet is assumed as the heat dissipation member 7, it adds to a heat dissipation sheet Alternatively, the heat radiation member 7 may be used in combination with a cooler such as a pipe passing a refrigerant.

  FIG. 4 shows a different capacitor 1A of the present invention. As shown in the figure, the capacitor 1A includes a heat dissipation member 7A as a component of the capacitor. The heat radiating member 7A is provided with a convex portion 7a at a position corresponding to the opening 32a1 of the horizontal portion 32a of the first electrode plate 3. Therefore, when the heat dissipation member 7A is brought into contact with the horizontal portion 32a of the first electrode plate 3, the convex portion 7a of the heat dissipation member 7A contacts the horizontal portion 42a1 of the second electrode plate 4A through the opening 32a1 of the first electrode plate 3. It comes in contact. Even with such a configuration, the same function and effect as the capacitor 1 can be obtained. As a method of forming the convex portion 7a, in addition to increasing the thickness of the portion to be the convex portion 7a in advance, the soft heat dissipating member is pressed against the first electrode plate 3 and the portion positioned in the opening 32a1 is It is good also as what is made convex part 7a to make it project rather than the part of.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, It is possible to change variously within the scope of this invention, and to implement. For example, in the above embodiment, the opening 32a1 is provided in the first electrode plate 3. However, as in the first electrode plate 3A shown in FIG. 5, a notch is used instead of the opening 32a1 or together with the opening 32a1. The part 32a2 may be provided. Even in this case, the same function and effect as the capacitor 1 can be obtained. In addition, although the horizontal portion 32 a is the “contact portion” to be in contact with the heat dissipation member 7, the lead portions 32 and 42 can be applied to any portion where the electrode plates 3 and 4 overlap with each other. It is good also as "contact part". For example, the vertical portion 32b may be referred to as a "contact portion", and the vertical portion 32b may be provided with the opening 32a1 and the notch 32a2.

  In the above embodiment, the opening 32a1 and the notch 32a2 are provided in the first electrode 3. However, the opening and the notch may be provided in the second electrode plate 4. That is, the second electrode plate 4 may be provided with a “contact portion”. The shapes of the opening 32a1, the notch 32a2, and the projections 42a1 and 7a are not particularly limited, and various shapes can be adopted in accordance with the positions to be provided, such as a polygon and a circle. Moreover, the number can also be changed suitably.

  Moreover, in the said embodiment, although the board | substrate part 31 of the 1st electrode plate 3 was located in the case opening part 51c side and the board | substrate part 41 of the 2nd electrode plate 4 was located in the case bottom part 51a side, For example, the substrate portions 31 and 41 may be overlapped with each other and positioned on the case opening 51 c side or the case bottom 51 a side. Furthermore, they may be arranged to face the case side wall 51b. With regard to the direction of the capacitor element 2 as well, the electrode portions 2a and 2b do not necessarily have to be oriented in the vertical direction, and may be oriented in the lateral direction (the case side wall portion 51b side). The capacitor element 2 is not limited to a film capacitor, and various capacitor elements such as a ceramic capacitor may be used. Also for the shape, various shapes such as a cylindrical shape and a prismatic shape can be adopted. Insulating paper or the like may be used as the insulating layer between the electrode plates 3 and 4.

DESCRIPTION OF SYMBOLS 1, 1A Capacitor 2 Capacitor element 2a, 2b Electrode part 2c Flat part 2d Curved part 3, 3A First electrode plate 31 Substrate part 31a Connection piece 32 Leading part 32a Horizontal part 32a1 Opening part 32a2 Notch part 32b Vertical part 32b1 External connection Part 33 Connecting part 4, 4A Second electrode plate 41 Substrate part 41a Connection piece 42 Drawing part 42a Horizontal part 42a1 Convex part 42b Vertical part 42b1 External connecting part 43 Connecting part 5 Case 51 Housing 51a Bottom 51b Sidewall 51c Opening 52 Guide portion 6 Filled resin 7, 7A Heat dissipation member 7a Convex portion

Claims (2)

A capacitor in which a capacitor element (2) and a pair of positive and negative electrode plates (3 (3A), 4 (4A)) are accommodated in a case (5) and filled with a resin (6),
The positive and negative electrode plates (3 (3A), 4 (4A)) respectively have lead portions (32, 42) drawn out of the resin (6), and these lead portions (32, 42) overlap each other,
The lead-out portion (32) of one electrode plate (3 (3A)) is provided with a contact portion which abuts on the heat dissipation member (7 (7A)) on the opposite side of the other electrode plate (4 (4A)) An opening (32a1) and / or a notch for bringing the lead-out portion (42) of the other electrode plate (4 (4A)) and the heat dissipation member (7 (7A)) into contact with this contact portion (32a2) is provided. A protruding portion (42a1) that comes in contact with the heat dissipation member (7) through the opening (32a1) and / or the notch (32a2) in the lead-out portion (42) of the other electrode plate (4); The capacitor according to claim 1.

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