capacitor

Abstract

A capacitor includes a case that houses a capacitor element, a filled resin that has an exposed surface exposed to the outside and is filled in the case, and a bus bar. The bus bar has a protruding portion that protrudes from the inside of the filled resin to the outside, a flat portion, and a first external connection terminal portion. The flat portion has a first end and a second end to which the protruding portion and the first external connection terminal portion are connected. The protruding portion is bent at the second end so as to extend in a first direction with a first axis as a center, and the first external connection terminal portion is bent at the second end so as to extend in a second direction opposite to the first direction with a second axis as a center. The first axis and the second axis are respectively arranged on a surface opposite to the exposed surface.

Description

Technical Field

[0001] This disclosure relates generally to capacitors, and more specifically to capacitors having capacitor elements. Background Technology

[0002] Patent Document 1 discloses a capacitor. In this capacitor, a capacitor element and a pair of positive and negative external connection electrode plates are housed within a housing. The capacitor element has electrode portions at both ends. The pair of positive and negative external connection electrode plates have external connection portions.

[0003] Multiple capacitor elements are arranged side by side with their electrodes facing outwards, and these capacitor elements are connected to an external connection electrode plate via an element electrode plate that connects them together.

[0004] The positive and negative pair of external connection electrode plates each have a main body portion that overlaps in the vertical direction and is connected to the electrode plate of the element above the capacitor element, and the external connection portions extend from the outer edge of the main body portion.

[0005] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2019-033133 Summary of the Invention The technical problem that the invention aims to solve In the capacitor of Patent Document 1, the external connection protrudes upwards only from the surface of the resin filled within the casing. Therefore, for example, when the capacitor is mounted to an external device, stress tends to concentrate near the root of the external connection when external force is applied. This can cause cracks to form between the external connection and the resin, and if these cracks deepen, they may adversely affect the sealing performance of the capacitor element. Furthermore, if the stress increases further, there is a risk that the external connection may break or fracture.

[0006] This disclosure provides a capacitor that can alleviate stress generated in the busbar during installation work of external equipment, etc.

[0007] Solution to the above technical problems One aspect of this disclosure relates to a capacitor comprising: a capacitor element; a housing accommodating the capacitor element; a filling resin having an exposed surface extending outwards, being filled within the housing and sealing the capacitor element; and a busbar connected to the capacitor element and extending outwards from the exposed surface of the filling resin. The busbar comprises: a protrusion projecting outwards from the interior of the filling resin, a planar portion, and a first external connection terminal portion. The planar portion comprises: a first end and a second end opposite to the first end and connected to the protrusion and the first external connection terminal portion. The protrusion at the second end is bent about a first axis of the planar portion to extend in a first direction, and the first external connection terminal portion at the second end is bent about a second axis of the planar portion to extend in a second direction opposite to the first direction. The first axis and the second axis are respectively disposed on a surface opposite to the exposed surface.

[0008] Invention Effects According to this disclosure, stress generated in the busbar can be alleviated during installation work of external equipment, etc. Attached Figure Description

[0009] Figure 1 This is a perspective view of the capacitor according to the first embodiment.

[0010] Figure 2 This is an exploded perspective view of the capacitor according to the first embodiment.

[0011] Figure 3 This is a cross-sectional view of the capacitor according to the first embodiment.

[0012] Figure 4 This is a front view showing the busbar used in the capacitor according to the first embodiment.

[0013] Figure 5 This is a plan view showing the bus according to the first embodiment.

[0014] Figure 6 yes Figure 5 An enlarged plan view of part A.

[0015] Figure 7 This is a side view showing the bus according to the first embodiment.

[0016] Figure 8 This is a perspective view of the capacitor according to the second embodiment.

[0017] Figure 9 This is an exploded perspective view of the capacitor according to the second embodiment.

[0018] Figure 10 This is a cross-sectional view of the capacitor according to the second embodiment.

[0019] Figure 11 This is a front view showing the busbar used in the capacitor according to the second embodiment.

[0020] Figure 12 This is a plan view showing the busbar involved in the second embodiment.

[0021] Figure 13 This is a side view showing the bus according to the second embodiment.

[0022] Figure 14 This is a perspective view of the capacitor involved in a variation of the first embodiment.

[0023] Figure 15 This is a perspective view of the capacitor involved in a variation of the second embodiment. Detailed Implementation

[0024] 1. Summary In the capacitor of Patent Document 1, as described above, there is a problem that stress tends to concentrate near the root of the external connection during installation of external equipment. This problem may cause cracks between the external connection and the resin, thereby affecting the sealing performance of the capacitor element.

[0025] Therefore, in order to fundamentally solve the above problems, the inventors conducted in-depth research and developed the capacitor 1 described below.

[0026] That is, the capacitor 1 involved in this embodiment, such as Figure 1 As shown, it includes: a capacitor element 2; a housing 3 for housing the capacitor element 2; a filling resin 4 having an exposed surface 40 that is filled inside the housing 3 and seals the capacitor element 2; and a busbar 5 connected to the capacitor element 2 and extending outward from the exposed surface 40 of the filling resin 4.

[0027] In addition, such as Figure 3 As shown, the busbar 5 has: a protrusion 6 protruding from the inside of the filling resin 4 to the outside, a flat portion 7, and at least one first external connection terminal portion 81.

[0028] In addition, such as Figure 4 and Figure 5 As shown, the planar portion 7 has: a first end 71, and a second end 72 opposite to the first end 71 and connected to the protrusion 6 and the first external connection terminal portion 81.

[0029] In addition, such as Figure 5 and Figure 6As shown, the protrusion 6 is bent at its second end 72 and extends in one direction (first direction) centered on the first axis 91 of the planar portion 7, while the first external connecting terminal portion 81 is bent at its second end 72 and extends in the opposite direction (second direction) centered on the second axis 92 of the planar portion 7. The first axis 91 and the second axis 92 are respectively disposed on the surface opposite to the exposed surface 40.

[0030] Then, when the capacitor 1 is installed to an external device, the first external connection terminal 81 is used. In this case, external force may be applied to the first external connection terminal 81. Here, the busbar 5 is bent at two points between the first external connection terminal 81 and the protrusion 6. That is, it is bent once (at point 1) with the first axis 91 as the center, and further bent once (at point 2) with the second axis 92 as the center. Through these two bends and the planar surface 7, it can be presumed that the stress applied to the busbar 5 is dispersed.

[0031] Therefore, according to the capacitor 1 of this embodiment, stress generated on the busbar 5 can be relieved when installing external equipment.

[0032] Furthermore, as described later, the bus 5 may sometimes have a second external connection terminal portion 82, but in this embodiment, as described above, the main focus is on alleviating the stress generated on the bus 5 when using the first external connection terminal portion 81.

[0033] 2. Details Hereinafter, regarding the capacitor 1 according to the first and second embodiments, refer to Figures 1-15 Please note that the figures are schematic and the proportions of the size and thickness of each component may not necessarily reflect the actual dimensions.

[0034] The arrows in the diagrams indicating the up / down, left / right, and front / back directions are not intended to specify the direction of capacitor 1 during use; they are merely for illustrative purposes and do not constitute a physical entity. The up / down direction is considered a "top view," the left / right direction is considered a "side view," and the front / back direction is considered a "front view."

[0035] (1) First implementation method Hereinafter, regarding the capacitor 1 according to the first embodiment, refer to Figures 1 to 7 Please provide an explanation. For example... Figure 1 As shown, capacitor 1 includes at least one capacitor element 2, a housing 3, a filling resin 4, and at least one busbar 5. In the first embodiment, capacitor 1 includes six capacitor elements 2 and two busbars 5, but the number of capacitor elements 2 and the number of busbars 5 are not particularly limited. Capacitor 1 may further include an insulating component 39.

[0036] <Capacitor Components> The capacitor element 2 is not particularly limited; for example, wound film capacitor elements and laminated film capacitor elements can be listed. The capacitor element 2 has an element body 20, a first end electrode 21, and a second end electrode 22 (see reference). Figure 2 and Figure 3 ).

[0037] Component Body The shape of the component body 20 is not particularly limited, but in the first embodiment, the component body 20 is rectangular in top view, rectangular in side view, and flattened oval in front view. Although the figures are omitted, the component body 20 includes a dielectric film, a first metal film, and a second metal film.

[0038] There are no particular limitations on the raw materials for dielectric films; for example, polypropylene (PP) and polyethylene terephthalate (PET) can be listed.

[0039] The first and second metal films are located inside the component body 20 and are positioned opposite each other, separated by a dielectric film. The first and second metal films are disposed on the dielectric film. The first and second metal films are formed, for example, by vapor deposition. The materials of the first and second metal films are not particularly limited; for example, aluminum (Al), magnesium (Mg), and their alloys can be listed.

[0040] First end face electrode and second end face electrode The first end-face electrode 21 is disposed on the front surface of the component body 20. The second end-face electrode 22 is disposed on the rear surface of the component body 20. The first end-face electrode 21 and the second end-face electrode 22 are formed, for example, by metal spraying (metal plating). The metal sprayed is not particularly limited, and examples include zinc (Zn), tin (Sn), and their alloys.

[0041] The first end electrode 21 is electrically connected to the first metal film inside the component body 20. On the other hand, the second end electrode 22 is electrically connected to the second metal film inside the component body 20.

[0042] Configuration Method In the first embodiment, six capacitor elements 2 are arranged in a left-right direction. The six capacitor elements 2 are arranged in a horizontal manner. That is, the six capacitor elements 2 are arranged with their first end face electrode 21 and second end face electrode 22 arranged in a front-back direction.

[0043] <Shell> The housing 3 houses the capacitor element 2. The housing 3 opens upwards (see reference). Figure 2 The raw materials for the shell 3 are not particularly limited; for example, polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), epoxy resin (EP), etc. can be listed.

[0044] <Filled Resin> Resin 4 is filled into the housing 3 (see reference). Figure 1 and Figure 3 Filler resin 4 is a liquid-curing resin that has been cured and possesses electrical insulating properties. The curing resin is not particularly limited; examples include thermosetting resins and photocuring resins. Specifically, the curing resin is not particularly limited; examples include epoxy resins.

[0045] The filler resin 4 seals the capacitor element 2. This blocks the capacitor element 2 from contact with external air, protecting it from moisture, dust, and other contaminants. The filler resin 4 also seals a portion of the busbar 5.

[0046] The filling resin 4 has an exposed surface 40. The exposed surface 40 is a surface that is exposed to the outside. In the first embodiment, the exposed surface 40 is the upper surface of the filling resin 4, and is a flat surface.

[0047] <Busboard> Busbar 5 is a conductive component used to electrically connect capacitor element 2 to external equipment (not shown, the same below). Busbar 5 is formed by cutting a metal plate into a predetermined shape and bending it appropriately. While there are no particular limitations on the metal plate, examples include copper plates and aluminum plates. Similarly, while there are no particular limitations on the external equipment, examples include components constituting an inverter and a DC power supply (battery).

[0048] In the first embodiment, the bus 5 includes a first bus 5a and a second bus 5b. The first bus 5a is connected to the first end electrode 21 of the capacitor element 2. On the other hand, the second bus 5b is connected to the second end electrode 22 of the capacitor element 2. Thus, the bus 5 is connected to the capacitor element 2.

[0049] Hereinafter, bus 5a and bus 5b will be collectively referred to as bus 5. When it is necessary to distinguish between bus 5a and bus 5b, the constituent elements of bus 5a are indicated by adding "a" after the reference numerals of the constituent elements of bus 5, and the constituent elements of bus 5b are indicated by adding "b" after the reference numerals of the constituent elements of bus 5.

[0050] The busbar 5 extends outward from the exposed surface 40 of the filled resin 4 (see reference). Figure 3 In other words, a portion of busbar 5 is sealed by filling resin 4. Specifically, a portion of each of the first busbar 5a and the second busbar 5b is sealed by filling resin 4. The remaining portions of each of the first busbar 5a and the second busbar 5b are outside the filling resin 4.

[0051] Bus 5 has a protrusion 6, a flat portion 7, at least one first external connection terminal portion 81, and a component connection portion 50. In the first embodiment, bus 5 also has a second external connection terminal portion 82. Specifically, the first bus 5a has a protrusion 6a, a flat portion 7a, three first external connection terminals 81a, a component connection portion 50a, and a second external connection terminal portion 82a. On the other hand, the second bus 5b has a protrusion 6b, a flat portion 7b, three first external connection terminals 81b, a component connection portion 50b, and a second external connection terminal portion 82b. Furthermore, the number of first external connection terminals 81 in the bus 5 is not particularly limited.

[0052] The Prominent Section Protrusion 6 protrudes from the inside of the filling resin 4 to the outside (see reference) Figure 3 In the first embodiment, the protrusion 6 extends in the vertical direction. Protrusions 6a and 6b are opposite each other with an insulating member 39 between them.

[0053] Planar Section The planar portion 7 has a plate-like shape. In the first embodiment, the planar portion 7 has a thickness in the vertical direction, a width in the front-back direction, and a length extending in the left-right direction greater than its width (see reference). Figure 2 ).

[0054] The flat portion 7 faces the exposed surface 40 of the filling resin 4 (see reference). Figure 3 In the first embodiment, the entire planar portion 7a faces the exposed surface 40. On the other hand, a portion of the planar portion 7b does not face the exposed surface 40, but the remaining portion of the planar portion 7b faces the exposed surface 40. Thus, a portion of the planar portion 7 can protrude from the housing 3.

[0055] The planar portion 7 separates from the filling resin 4 (see reference). Figure 3 That is, the planar portion 7 does not directly contact the exposed surface 40. In the first embodiment, the planar portion 7 also does not directly contact the housing 3.

[0056] In the first embodiment, the planar portion 7 is parallel to the exposed surface 40 of the filling resin 4. However, the planar portion 7 may also be inclined relative to the exposed surface 40 of the filling resin 4, provided that the effect of this disclosure is not compromised.

[0057] like Figure 5 As shown, when viewed from above, the planar portion 7 is generally rectangular. The planar portion 7 has a first end 71, a second end 72, a third end 73, and a fourth end 74. When viewed from above, the planar portion 7 is the portion surrounded by the first end 71, the second end 72, the third end 73, and the fourth end 74.

[0058] [First End] like Figure 5 As shown, in the planar portion 7a, the first end 71a is the end located at the front. On the other hand, in the planar portion 7b, the first end 71b is the end located at the rear.

[0059] [Second End] like Figure 5 As shown, in the planar portion 7a, the second end 72a is the rearward end. On the other hand, in the planar portion 7b, the second end 72b is the frontward end. Thus, in the planar portion 7, the second end 72b is opposite to the first end 71. Figure 3 As shown, the second end 72a of the planar portion 7a and the second end 72b of the planar portion 7b are opposite each other through the insulating member 39.

[0060] like Figure 4 and Figure 5 As shown, the protrusion 6 and the first external connection terminal 81 are connected to the second end 72. The protrusion 6 and the first external connection terminal 81 are not directly connected, but are indirectly connected via the second end 72 of the flat portion 7.

[0061] Specifically, the protrusion 6a and the first external connection terminal 81a are connected to the second end 72a. The protrusion 6a and the first external connection terminal 81a are indirectly connected via the second end 72a of the flat portion 7a. On the other hand, the protrusion 6b and the first external connection terminal 81b are connected to the second end 72b. The protrusion 6b and the first external connection terminal 81b are indirectly connected via the second end 72b of the flat portion 7b.

[0062] Figure 6 yes Figure 5 An enlarged plan view of part A (the area enclosed by a single-dotted line). For example... Figure 6 As shown, the second end 72 includes at least one first axis 91 and at least one second axis 92. The first axis 91 and the second axis 92 are virtual axes (in...). Figure 6 (Represented by an imaginary line with double dots and dashes), the busbar 5 is bent around these axes. In the first embodiment, the first axis 91 and the second axis 92 each extend in the left-right direction. That is, the first axis 91 and the second axis 92 are parallel. However, the first axis 91 and the second axis 92 may not be parallel as long as the effect of this disclosure is not impaired.

[0063] Axis 1 (91) and axis 2 (92) are each positioned on a surface opposite to exposed surface 40. When viewed from above, axes 1 (91) and 2 (92) overlap with exposed surface 40. Furthermore, for ease of reading, axes 1 (91) and 2 (92) are only shown in the diagram on [the surface]. Figure 6 As shown in the image.

[0064] In the first embodiment, the second end 72a includes four first shafts 91a and three second shafts 92a. On the other hand, the second end 72b includes four first shafts 91b and three second shafts 92b.

[0065] In the first embodiment, the first axis 91 and the second axis 92 are arranged alternately in the left-right direction. The first axis 91 and the second axis 92 may or may not be located on the same straight line. For example, the first axis 91 and the second axis 92 may be misaligned in the front-back direction.

[0066] Specifically, such as Figure 5 and Figure 6 As shown, axes 91a and 92a are arranged alternately in the left-right direction and are roughly on the same straight line. Axes 91b and 92b are arranged alternately in the left-right direction and are roughly on the same straight line. Axe 92a is opposite axis 91b. Axe 92b is opposite axis 91a. Axes 91a and 91b may or may not be opposite each other.

[0067] like Figures 4-7 As shown, at the second end 72, the protrusion 6 is bent in one direction (first direction) with the first axis 91 of the planar portion 7 as the center. Thus, the portion bent with the first axis 91 as the center is the first bent portion 910. That is, the first bent portion 910 is the corner formed by the planar portion 7 and the protrusion 6. The first bent portion 910 may have rounded corners.

[0068] Specifically, at the second end 72a of the planar portion 7a, the protrusion 6a is bent downward about the first axis 91a to form the first bent portion 910a. On the other hand, at the second end 72b of the planar portion 7b, the protrusion 6b is bent downward about the first axis 91b to form the first bent portion 910b.

[0069] like Figures 4-7 As shown, further at the second end 72, the first external connection terminal portion 81 is bent around the second axis 92 of the planar portion 7, extending in a direction opposite to one direction (the second direction). Thus, the portion bent around the second axis 92 is the second bend portion 920. That is, the second bend portion 920 is the corner formed by the planar portion 7 and the first external connection terminal portion 81. The second bend portion 920 may have rounded corners.

[0070] Specifically, at the second end 72a of the planar portion 7a, the first external connection terminal portion 81a is bent upward about the second axis 92a to form a second bent portion 920a. On the other hand, at the second end 72b of the planar portion 7b, the first external connection terminal portion 81b is bent upward about the second axis 92b to form a second bent portion 920b.

[0071] As described above, since the first axis 91 and the second axis 92 are arranged alternately in the left-right direction, the first bend 910 and the second bend 920 are also arranged alternately in the left-right direction. Furthermore, since the second axis 92a is opposite the first axis 91b, the second bend 920a is opposite the first bend 910b. Also, since the second axis 92b is opposite the first axis 91a, the second bend 920b is opposite the first bend 910a.

[0072] The first bend 910 and the second bend 920 are located outside the filling resin 4. Specifically, the first bend 910a and the second bend 920a are located above the exposed surface 40. Similarly, the first bend 910b and the second bend 920b are located above the exposed surface 40.

[0073] [Third and fourth ends] like Figure 5 As shown, the third end 73 is the end located on the left side of the planar portion 7. That is, the third end 73a is provided at the left end of the planar portion 7a. On the other hand, the third end 73b is provided at the left end of the planar portion 7b.

[0074] On the other hand, the fourth end 74 is located at the right end of the planar portion 7. That is, the fourth end 74a is provided at the right end of the planar portion 7a. On the other hand, the fourth end 74b is provided at the right end of the planar portion 7b.

[0075] First External Connection Terminal Section The first external connection terminal portion 81 is connected to an external device by means of fastening or the like. The direction in which the first external connection terminal portion 81 extends is parallel to the direction in which the protrusion 6 extends. In the first embodiment, the first external connection terminal portion 81 extends in the vertical direction. Therefore, the first external connection terminal portion 81 and the protrusion 6 are parallel. However, the first external connection terminal portion 81 and the protrusion 6 may not be parallel, provided that the effect of this disclosure is not impaired.

[0076] In the first embodiment, the first external connection terminal portion 81 and the protrusion 6 exist on the same plane extending in both the vertical and horizontal directions. However, the first external connection terminal portion 81 and the protrusion 6 may not exist on the same plane, provided that the effect of this disclosure is not compromised.

[0077] Furthermore, in the first embodiment, the first external connection terminal portion 81 has a through hole 83. The through hole 83 is used for connection with an external device. The through hole 83 extends through in the front-rear direction.

[0078] like Figure 3 and Figure 7As shown, when viewed from the side, focusing on the protrusion 6, the flat portion 7, and the first external connection terminal portion 81 in the busbar 5, these portions are roughly T-shaped. In other words, from one end (the second end 72) of the flat portion 7, the protrusion 6 and the first external connection terminal portion 81 fold back in opposite directions.

[0079] In other words, the rotational direction of bending along the first axis 91 is the same as the rotational direction of bending along the second axis 92. Specifically, in a side view (viewed from the right), with the protrusion 6a as a reference, the flat portion 7a is bent in a leftward rotational direction centered on the first axis 91a. Further, with the flat portion 7a as a reference, the first external connecting terminal portion 81a is bent in a leftward rotational direction centered on the second axis 92a. Thus, the rotational directions of bending along the first axis 91 and the second axis 92 are the same.

[0080] In other words, the surface of busbar 5 is reversed between protrusion 6 and first external connection terminal 81. Specifically, the surface of the first busbar 5a refers to, for example, the upper and lower surfaces of the planar portion 7a. The upper surface of the planar portion 7a is connected to the rear surface of protrusion 6a. On the other hand, the lower surface of the planar portion 7a is connected to the rear surface of the first external connection terminal 81a. Furthermore, the rear surface of the first external connection terminal 81a (the surface connected to the lower surface of the planar portion 7a) is higher than the rear surface of the protrusion 6a (the surface connected to the upper surface of the planar portion 7a). Therefore, the surface of busbar 5 is reversed between protrusion 6 and first external connection terminal 81.

[0081] Other examples Figures 4-6 As shown, when viewed from the front and from above, the first bend 910 and the second bend 920 are arranged alternately in the left-right direction, and therefore the protrusion 6 and the first external connection terminal 81 are arranged alternately in the left-right direction. Furthermore, the first external connection terminal 81a and the first external connection terminal 81b are arranged alternately in the left-right direction.

[0082] In the first embodiment, such as Figure 2 As shown, the first external connection terminal portion 81 is formed by cutting, thus forming a through hole 53 (cut hole). The through hole 53 extends from directly below the first external connection terminal portion 81, through the space between two adjacent left and right protrusions 6, to the component connection portion 50.

[0083] The busbar 5 in the first embodiment has the same number of through holes 53 as the first external connection terminal portion 81. As described above, the through holes 53 are formed by cutting, so the area of ​​the through holes 53 is approximately equal to the area of ​​the first external connection terminal portion 81. Figure 2 and Figure 4As shown, the through hole 53 is adjacent to the first external connection terminal portion 81, the protrusion 6, and the component connection portion 50. Most of the through hole 53 is embedded in the filling resin 4.

[0084] Component Connection Section The component connection portion 50 is connected to the capacitor element 2. The component connection portion 50 extends forward or backward from the lower end of the protrusion 6 and further downward. The front end of the component connection portion 50 is provided with at least the same number of electrode pins 500 as the capacitor element 2.

[0085] Specifically, the component connection portion 50a extends forward from the lower end of the protrusion 6a and further downward. Six electrode pins 500a are provided at the front end of the component connection portion 50a. The electrode pins 500a are connected to the first end face electrode 21 by, for example, soldering. On the other hand, the component connection portion 50b extends rearward from the lower end of the protrusion 6b and further downward. Six electrode pins 500b are provided at the front end of the component connection portion 50b. The electrode pins 500b are connected to the second end face electrode 22 by, for example, soldering.

[0086] Second External Connection Terminal Section The second external connection terminal 82 is connected to a DC power supply by means of fastening or the like. The second external connection terminal 82 is connected to the flat part 7 (see reference). Figure 2 Specifically, such as Figure 4 and Figure 5 As shown, the second external connection terminal portion 82a extends upward from the third end 73 of the planar portion 7a, then extends rearward, and is further bent to the left. The total length of the second external connection terminal portion 82a is greater than the total length of the first external connection terminal portion 81. On the other hand, the second external connection terminal portion 82b extends upward from the first end 71 near the third end 73 of the planar portion 7a.

[0087] In the first embodiment, the second external connection terminal portion 82 has a through hole 84. The through hole 84 is used for connection to a DC power supply. The through hole 84 extends through in the front-rear direction.

[0088] <Insulating Components> The insulating component 39 is used to prevent a short circuit between the first busbar 5a and the second busbar 5b. The insulating component 39 has a base plate portion 391 and a partition wall portion 392 (see reference). Figure 2The base plate portion 391 has a thickness in the vertical direction, a width in the front-back direction, and a length extending in the left-right direction greater than its width. The partition wall portion 392 has a thickness in the front-back direction, a height in the vertical direction, and a length extending in the left-right direction approximately the same as that of the base plate portion 391. The partition wall portion 392 rises upward from approximately the center of the base plate portion 391 in the width direction. Thus, the insulating member 39 has a generally T-shaped profile in side view and extends in the left-right direction (see reference). Figure 2 and Figure 3 ).

[0089] like Figure 3 As shown, a corner portion formed by a protrusion 6a and a component connecting portion 50a is disposed at the front corner portion formed by the base plate portion 391 and the partition wall portion 392. On the other hand, a corner portion formed by a protrusion 6b and a component connecting portion 50b is disposed at the rear corner portion formed by the base plate portion 391 and the partition wall portion 392.

[0090] The raw materials for insulating components 39 are not particularly limited, and examples include polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), epoxy resin (EP), etc.

[0091] <Effects> When the capacitor 1 according to the first embodiment is installed to an external device, the first external connection terminal 81 is used. At this time, the external force mainly acts on the first external connection terminal 81 in the front-back direction. Here, the busbar 5 is bent at two points between the first external connection terminal 81 and the protrusion 6. That is, the first shaft 91 and the second shaft 92 extend in a direction approximately perpendicular to the direction of the external force (left-right direction), and are bent once (at one point) with the first shaft 91 as the center, and further bent once (at another point) with the second shaft 92 as the center. It is presumed that the stress applied to the busbar 5 is dispersed through these two bending points and the planar surface 7.

[0092] Therefore, according to the capacitor 1 of the first embodiment, stress generated in the busbar 5 can be alleviated during installation of external equipment, etc. Consequently, cracks are less likely to form between the protrusion 6 and the filling resin 4. Furthermore, by suppressing the increase in stress, breakage or damage to the busbar 5 can also be prevented.

[0093] In particular, the closer the first axis 91 and the second axis 92 are to being parallel, the easier it is to disperse the stress generated in the busbar 5. As a result, it is easier to alleviate the stress generated in the busbar 5.

[0094] Furthermore, in the first embodiment, the first bend 910 and the second bend 920 are located outside the filling resin 4. Thus, since the first bend 910 and the second bend 920 are not fixed by the filling resin 4, the stress generated in the busbar 5 is more easily dispersed. In other words, since the first bend 910 and the second bend 920 can undergo elastic deformation, the stress generated in the busbar 5 is more easily dispersed.

[0095] Furthermore, since the planar portion 7 is opposite to the exposed surface 40 of the filling resin 4, space saving can be achieved compared to the case where the planar portion 7 and the exposed surface 40 of the filling resin 4 are not opposite at all.

[0096] Furthermore, the planar portion 7 is separated from the filling resin 4. Thus, since the planar portion 7 does not directly contact the filling resin 4, the stress generated in the busbar 5 is more easily dispersed. That is, for example, even if the first bend 910 and the second bend 920 undergo elastic deformation, and the planar portion 7 is slightly tilted, it is difficult for new stress to be generated inside the planar portion 7.

[0097] In addition, the direction in which the protrusion 6 extends is parallel to the direction in which the first external connection terminal portion 81 extends (vertical direction in the first embodiment), which makes it easier to disperse the stress generated in the busbar 5.

[0098] Furthermore, in the first embodiment, since the busbar 5 has a through hole 53, it is presumed that the through hole 53 also helps to relieve stress. Moreover, since most of the through hole 53 is embedded in the filling resin 4, the bonding force between the busbar 5 and the filling resin 4 can also be improved through the anchoring effect.

[0099] Furthermore, in the capacitor 1 according to the first embodiment, the first external connection terminal 81 can be connected to an external device (e.g., a semiconductor device), and the second external connection terminal 82 can be connected to a DC power supply (battery). In this case, the planar portion 7 also serves as a path for the flow of direct current (DC current). Since the planar portion 7 exists outside the filling resin 4, the heat generated by the current flowing through the planar portion 7 is dissipated through natural convection.

[0100] (2) Second implementation method Regarding the capacitor 1 involved in the second embodiment, refer to... Figures 8 to 13 The following explanation will be provided. In the second embodiment, for components that are the same as those in the first embodiment, the same reference numerals are sometimes used as in the first embodiment, and detailed descriptions are omitted. Hereinafter, the explanation will focus on the differences from the first embodiment.

[0101] <Difference 1> In the first embodiment, the first busbar 5a and the second busbar 5b are each composed of a single component, but in the second embodiment, the first busbar 5a and the second busbar 5b are each composed of multiple components. Alternatively, one of the first busbar 5a and the second busbar 5b may be composed of multiple components, while the other may be composed of a single component.

[0102] Specifically, in the second embodiment, busbar 5 includes a first component 51 and a second component 52. More specifically, the first busbar 5a includes a first component 51a and a second component 52a. The second busbar 5b includes a first component 51b and a second component 52b. Furthermore, the raw materials of the first component 51 and the second component 52 may be the same or different.

[0103] The first component 51 is a component having a first bent portion 910. Specifically, the first component 51 has a protrusion 6, a first flat portion 710, and a component connecting portion 50. In the second embodiment, the first bent portion 910 is a corner formed by the first flat portion 710 and the protrusion 6. The first bent portion 910 may have rounded corners. The first flat portion 710 constitutes a flat portion 7.

[0104] The second component 52 is a component having a second bend 920. Specifically, the second component 52 has a second planar portion 720, at least one first external connection terminal portion 81, and a second external connection terminal portion 82. The second bend 920 is a corner formed by the second planar portion 720 and the first external connection terminal portion 81. The second bend 920 may have rounded corners. The second planar portion 720 also forms a planar portion 7 in the same way as the first planar portion 710. That is, the planar portion 7 is formed by the first planar portion 710 and the second planar portion 720. In the second embodiment, the first planar portion 710 and the second planar portion 720 overlap in the vertical direction (see reference). Figure 10 ).

[0105] The first component 51 and the second component 52 are joined together. Specifically, the upper surface of the first planar portion 710 overlaps with the lower surface of the second planar portion 720, thereby joining the first planar portion 710 and the second planar portion 720. That is, the planar portion 7 is formed by the joining portion (first planar portion 710, second planar portion 720) of the first component 51 and the second component 52. The joining method is not particularly limited, and examples include welding.

[0106] In the second embodiment, the first component 51 and the second component 52 have different thicknesses. Specifically, the second component 52 is thicker than the first component 51.

[0107] Here, when the thicknesses of the second planar portion 720, the first external connection terminal portion 81, and the second external connection terminal portion 82 are the same, the thickness of the second component 52 refers to these thicknesses. When the thicknesses of the second planar portion 720, the first external connection terminal portion 81, and the second external connection terminal portion 82 are different, the thickness refers to the smallest of these thicknesses.

[0108] When the thicknesses of the protrusion 6, the first flat portion 710, and the component connecting portion 50 are the same, the thickness of the first component 51 refers to these thicknesses. When the thicknesses of the protrusion 6, the first flat portion 710, and the component connecting portion 50 are different, the thickness refers to the maximum thickness among these thicknesses.

[0109] <Difference 2> In the second embodiment, the arrangement of the capacitor elements 2 differs from that in the first embodiment. Specifically, in the first embodiment, the six capacitor elements 2 are arranged horizontally, while in the second embodiment, the six capacitor elements 2 are arranged vertically. That is, the six capacitor elements 2 are arranged such that their first end face electrodes 21 and second end face electrodes 22 are arranged vertically. Consequently, in the second embodiment, the shape of the component connection portion 50 of the busbar 5 and the shape of the housing 3 also differ from those in the first embodiment.

[0110] <Effects> The second embodiment also has the same effect as the first embodiment.

[0111] Furthermore, in the second embodiment, since the busbar 5 is composed of multiple components (first component 51 and second component 52), the manufacture of the capacitor 1 becomes easier. That is, for example, the first component 51 and the second component 52 can be joined after the capacitor element 2 is sealed with the filling resin 4, thus making the manufacture of the capacitor 1 easier.

[0112] Furthermore, since the thickness of the second component 52 is greater than the thickness of the first component 51, the resistance of the second component 52 is smaller compared to that of the first component 51, which can suppress heat generation during energization. Moreover, since the second component 52 is located outside the filling resin 4, the heat from the second component 52 is dissipated through natural convection. In other words, heat dissipation is improved by the second component 52. On the other hand, since the thickness of the first component 51 is smaller than the thickness of the second component 52, processing, including soldering the capacitor element 2, is easier, and manufacturing costs can be reduced.

[0113] 3. Variations Figure 14A variation of the capacitor 1 according to the first embodiment is shown. In the first embodiment, the six capacitor elements 2 are arranged horizontally, but in this variation, the six capacitor elements 2 are arranged vertically.

[0114] Figure 15 A variation of the capacitor 1 according to the second embodiment is shown. In the second embodiment, the six capacitor elements 2 are arranged vertically, but in this variation, the six capacitor elements 2 are arranged horizontally.

[0115] In the capacitor 1 described in embodiments 1 and 2 (including variations), a heat sink, heat fins, etc., may also be installed. This further improves heat dissipation.

[0116] 4. Plan As clearly demonstrated by the embodiments and variations described above, this disclosure includes the following solutions. Hereinafter, parenthesized reference numerals are used only to clarify the correspondence with the embodiments.

[0117] The first embodiment is a capacitor (1) comprising: a capacitor element (2); a housing (3) for housing the capacitor element (2); a filling resin (4) having an exposed surface (40) that is filled inside the housing (3) and seals the capacitor element (2); and a busbar (5) connected to the capacitor element (2) and extending outward from the exposed surface (40) of the filling resin (4). The busbar (5) comprises: a protrusion (6) protruding outward from the interior of the filling resin (4), a flat surface (7), and a first external connection terminal (81). The flat surface (7) comprises: a first end (71) and a second end (72) opposite to the first end (71) and connected to the protrusion (6) and the first external connection terminal (81). The protrusion (6) is bent at its second end (72) with the first axis (91) of the planar portion (7) as the center, extending in a first direction. The first external connecting terminal portion (81) is bent at its second end (72) with the second axis (92) of the planar portion (7) as the center, extending in a second direction opposite to the first direction. The first axis (91) and the second axis (92) are respectively disposed on the surface opposite to the exposed surface (40).

[0118] According to this scheme, stress generated on the busbar (5) can be relieved when installing external equipment.

[0119] The second scheme is a capacitor (1) based on the first scheme. In the second scheme, a first bent portion (910) centered on the first axis (91) and a second bent portion (920) centered on the second axis (92) exist outside the filling resin (4).

[0120] According to this scheme, since the first bend (910) and the second bend (920) are not fixed by the filling resin (4), the stress generated on the busbar (5) is more easily dispersed.

[0121] The third option is a capacitor (1) based on the first or second option. In the third option, the planar portion (7) is opposite to the exposed surface (40) of the filling resin (4).

[0122] According to this scheme, space saving can be achieved compared to the case where the exposed surfaces (40) of the planar part (7) and the filling resin (4) are not aligned at all.

[0123] The fourth scheme is a capacitor (1) based on any one of the first to third schemes. In the fourth scheme, the planar part (7) is separated from the filling resin (4).

[0124] According to this scheme, since the flat part (7) does not directly contact the filling resin (4), the stress generated on the busbar (5) is more easily dispersed.

[0125] The fifth scheme is a capacitor (1) based on any one of the first to fourth schemes. In the fifth scheme, the first direction in which the protrusion (6) extends is parallel to the second direction in which the first external connection terminal portion (81) extends.

[0126] According to this scheme, the stress generated on the busbar (5) is more easily dispersed.

[0127] The sixth embodiment is a capacitor (1) based on any one of the first to fifth embodiments. In the sixth embodiment, the bus (5) includes a first component (51) having a first bend (910) and a second component (52) having a second bend (920). The first component (51) and the second component (52) are joined together. The flat portion (7) includes the joint portions (710, 720) of the first component (51) and the second component (52).

[0128] According to this scheme, for example, the first part (51) and the second part (52) can be joined after the capacitor element (2) is sealed by filling resin (4), thus making the manufacture of the capacitor (1) easier.

[0129] Scheme 7 is a capacitor (1) based on any one of schemes 1 to 6. In scheme 7, the thickness of the second component (52) is greater than the thickness of the first component (51).

[0130] According to this scheme, the resistance of the second component (52) is smaller than that of the first component (51), which can suppress the heat generation when energized.

[0131] The eighth scheme is a capacitor (1) based on any one of the first to seventh schemes. In the eighth scheme, the bus (5) also has a second external connection terminal (82) connected to the planar portion (7).

[0132] According to this scheme, the first external connection terminal (81) can be connected to an external device (e.g., a semiconductor device), and the second external connection terminal (82) can be connected to a DC power supply (battery).

[0133] Explanation of reference numerals in the attached figures 1. Capacitor 2. Capacitor Components 3. Shell 4. Filler resin 40. Showing face 5 busbars 51 Part 1 52 Part 2 6. Protrusion 7. Planar section 71 First End 72 End 2 81 First external connection terminal section 82 Second External Connection Terminal Section 91 Axis 1 910 First bend 92 Axis 2 920 Second bend.

Claims

1. A capacitor, characterized in that, have: Capacitor components; A housing that accommodates the capacitor element; A filling resin having an exposed surface facing outwards, which is filled inside the housing and seals the capacitor element; as well as A busbar connected to the capacitor element and extending outward from the exposed surface of the filled resin. The busbar has: a protrusion extending from the interior of the filling resin to the exterior, a planar portion, and a first external connection terminal portion. The planar portion has: a first end, and a second end opposite to the first end and connected to the protrusion and the first external connection terminal portion. The protrusion at the second end is bent at the first end about the first axis of the planar portion, extending in a first direction; the first external connecting terminal portion at the second end is bent at the second end about the second axis of the planar portion, extending in a second direction opposite to the first direction. The first axis and the second axis are respectively disposed on the surface opposite to the exposed surface.

2. The capacitor as claimed in claim 1, characterized in that, A first bent portion, which is bent around the first axis, and a second bent portion, which is bent around the second axis, exist outside the filling resin.

3. The capacitor as claimed in claim 1, characterized in that, The planar portion faces the exposed surface of the filling resin.

4. The capacitor as claimed in claim 1, characterized in that, The planar portion is separated from the filling resin.

5. The capacitor as claimed in claim 1, characterized in that, The first direction in which the protrusion extends is parallel to the second direction in which the first external connecting terminal portion extends.

6. The capacitor as claimed in claim 2, characterized in that, The busbar includes a first component having the first bend and a second component having the second bend. The first component and the second component are joined together. The planar portion includes the joint portion of the first component and the second component.

7. The capacitor as claimed in claim 6, characterized in that, The thickness of the second component is greater than the thickness of the first component.

8. The capacitor according to any one of claims 1 to 7, characterized in that, The busbar also has a second external connection terminal portion connected to the planar portion.

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