Electrolytic capacitors

Abstract

The disclosed electrolytic capacitor 100 comprises a capacitor element 110, an anode lead terminal 120, a cathode lead terminal 130, and an exterior body 101. The anode lead terminal 120 comprises an anode terminal section 121 and a first standing-up section 122. The first standing-up section 122 comprises two exposure sections 122a which are contiguous with the anode terminal section 121 and are exposed at a front surface 100f, and a bent section 122d which is disposed between the two exposure sections 122a and has a groove 122dg in the tip end thereof. The bent section 122d is bent toward a first end surface 110a side such that the groove 122dg is disposed inside the exterior body 101. An anode lead 112 is connected to the groove 122dg of the bent section 122d.

Description

[Technical field]

[0001] The present disclosure relates to electrolytic capacitors. [Background technology]

[0002] Electrolytic capacitors are mounted in various electronic devices. An electrolytic capacitor typically includes a capacitor element having an anode portion and a cathode portion, an anode lead terminal, a cathode lead terminal, and an exterior body that covers the capacitor element. The anode lead terminal is electrically connected to the anode portion, and the cathode lead terminal is electrically connected to the cathode portion.

[0003] Conventionally, anode lead terminals of various shapes have been proposed (for example, Patent Documents 1 and 2). Patent Document 1 discloses an anode terminal in which a metal sheet with an L-shaped cross section having horizontal and vertical pieces is divided into three vertical pieces, and the central piece is folded inward by 180 degrees so that its tip contacts the horizontal piece. An anode lead wire of a capacitor element is welded to the crease of the folded central piece. Patent Document 2 discloses "an anode lead frame including an anode terminal portion and an anode connecting portion formed by folding a part of the anode terminal portion from the outside to the inside in one direction and connected to the tantalum wire." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 59-004629 [Patent Document 2] JP 2015-088718 A Summary of the Invention [Problem to be solved by the invention]

[0005] Currently, there is a demand for an electrolytic capacitor that can be reliably mounted on a substrate. In addition, there is also a demand for a reliable connection between an anode lead and an anode lead terminal. In this situation, one of the objectives of the present disclosure is to provide an electrolytic capacitor that can be reliably mounted on a substrate and that can reliably connect an anode lead and an anode lead terminal. [Means for solving the problem]

[0006] One aspect of the present disclosure relates to an electrolytic capacitor having a bottom surface, a front surface rising from the bottom surface, and a rear surface opposite to the front surface, the electrolytic capacitor including a capacitor element having a first end surface facing the front surface, an anode lead terminal and a cathode lead terminal electrically connected to the capacitor element, and an exterior body arranged around the capacitor element, the capacitor element including an anode lead protruding from the first end surface toward the front surface, the anode lead terminal including an anode terminal portion exposed at the bottom surface and a first upright portion rising from the anode terminal portion, the first upright portion including two exposed portions connected to the anode terminal portion and exposed at the front surface, and a bent portion disposed between the two exposed portions and having a groove at its tip, the bent portion being bent toward the first end surface so that the groove is disposed in the exterior body, and the anode lead is connected to the groove of the bent portion. Effect of the Invention

[0007] According to the present disclosure, an electrolytic capacitor can be obtained that can be mounted on a substrate with high reliability and that can provide a reliable connection between an anode lead and an anode lead terminal. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view illustrating a schematic configuration of an example of an electrolytic capacitor according to the present disclosure. [Diagram 2] FIG. 2 is a front view illustrating a schematic view of the electrolytic capacitor illustrated in FIG. [Diagram 3] 2 is a cross-sectional view illustrating the electrolytic capacitor illustrated in FIG. 1. [Figure 4] 2 is a cross-sectional view showing a schematic shape of a part of the electrolytic capacitor shown in FIG. 1. [Diagram 5] FIG. 2 is a front view illustrating a schematic diagram of another example of the electrolytic capacitor according to the present disclosure. [Figure 6] FIG. 2 is a cross-sectional view illustrating a schematic diagram of another example of the electrolytic capacitor according to the present disclosure. [Figure 7] FIG. 2 is a cross-sectional view illustrating a schematic diagram of another example of the electrolytic capacitor according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In the following, the embodiment of the present disclosure will be described with examples, but the present disclosure is not limited to the examples described below. In the following description, specific numerical values ​​and materials may be exemplified, but other numerical values ​​and materials may be applied as long as the effects of the present disclosure are obtained. Note that components other than the characteristic parts of the present disclosure may be applied to components of known electrolytic capacitors.

[0010] (Electrolytic capacitor) The electrolytic capacitor of the present disclosure has a bottom surface, a front surface rising from the bottom surface, and a rear surface opposite to the front surface. Hereinafter, the bottom surface, the front surface, and the rear surface may be referred to as the "bottom surface (B)", the "front surface (F)", and the "rear surface (R)", respectively. Like the front surface (F), the rear surface (R) also rises from the bottom surface (B). The electrolytic capacitor includes a capacitor element having a first end surface facing the front surface (F), an anode lead terminal and a cathode lead terminal electrically connected to the capacitor element, and an exterior body disposed around the capacitor element. Hereinafter, the first end surface facing the front surface (F) may be referred to as the "first end surface (E1)". The capacitor element includes an anode lead protruding from the first end surface (E1) toward the front surface (F).

[0011] (Anode lead terminal) The anode lead terminal includes an anode terminal portion exposed at the bottom surface (B) and a first upright portion rising from the anode terminal portion. The first upright portion includes two exposed portions connected to the anode terminal portion and exposed at the front surface (F), and a bent portion disposed between the two exposed portions and having a groove at its tip. The bent portion is bent toward the first end surface (E1) so that the groove is disposed in the exterior body. The anode lead is connected to the groove of the bent portion.

[0012] The anode lead terminal may be formed by processing one metal sheet by a known metal processing method. The anode lead terminal can be produced, for example, by bending to form the first standing portion and processing to form the bent portion. The bent portion can be formed, for example, by making a cut in a part of the metal sheet and bending it. The bending to form the first standing portion and the processing to form the bent portion may be performed in either order, or may be performed simultaneously. In addition, when forming the bent portion, a part of the metal sheet around the bent portion may be removed by punching or the like.

[0013] The material of the anode lead terminal may be any material that can be used as the material of an anode lead terminal of an electrolytic capacitor. For example, a known material for an anode lead terminal used in an electrolytic capacitor may be used. The anode lead terminal may be formed by processing a metal sheet (including a metal plate and a metal foil) made of a metal (copper, copper alloy, etc.). The surface of the metal sheet may be plated with nickel, gold, or the like. The thickness of the metal sheet constituting the anode lead terminal may be in the range of 25 μm to 200 μm (for example, in the range of 25 μm to 100 μm).

[0014] There is no particular limitation on the method of connecting the groove of the bent portion and the anode lead. They may be connected by a conductive adhesive or solder, or may be connected by welding. Examples of welding include resistance welding and laser welding.

[0015] In the electrolytic capacitor of the present disclosure, the anode lead terminal includes an anode terminal portion exposed on the bottom surface (B) and two exposed portions exposed on the front surface (F). That is, the anode terminal portion and the two exposed portions are continuous in an exposed state at the corner portion between the bottom surface (B) and the front surface (F). With this configuration, when the anode terminal portion is soldered to a substrate or the like, it is possible to solder the entire anode terminal portion in a state where the solder wraps around the exposed portions. Therefore, the soldering area can be increased, and the electrolytic capacitor can be mounted on a substrate or the like with high reliability.

[0016] Furthermore, in the electrolytic capacitor of the present disclosure, the bent portion is bent toward the first end face (E1) so as to be disposed in the exterior body. The anode lead terminal and the anode lead are connected in the groove of the bent portion. On the other hand, in the above-mentioned Patent Document 1, the anode lead wire (anode lead) of the capacitor element is welded to the flat fold of the folded metal sheet. Therefore, compared to the electrolytic capacitor of Patent Document 1, the anode lead fits into the groove, and the position of the anode lead is fixed. Also, since the groove is located at the tip of the bent portion, it does not protrude from the exterior body. Therefore, in the electrolytic capacitor of the present disclosure, the anode lead terminal and the anode lead can be connected with high reliability.

[0017] Furthermore, in the electrolytic capacitor of the present disclosure, the first end face (E1) of the capacitor element can be brought closer to the bent portion. This allows the proportion (volume ratio) of the capacitor element in the electrolytic capacitor to be increased. Therefore, according to the present disclosure, the electrolytic capacitor can have a high capacity.

[0018] (Cathode lead terminal) The cathode lead terminal is not particularly limited, and a known cathode lead terminal may be used. The cathode lead terminal may be formed by processing a single metal sheet by a known metal processing method. The cathode lead terminal may be formed from a metal sheet exemplified as the material for the anode lead terminal.

[0019] The tip of the bent portion of the anode lead terminal where the groove is formed may extend substantially perpendicular to the surface of the anode terminal. This configuration makes it easy to reliably receive the anode lead in the groove and also makes it easy to connect the anode lead to the groove. Note that "substantially perpendicular" means that the angle A (see FIG. 4) between the direction in which the tip extends and the surface of the anode terminal is in the range of 80 to 100° (e.g., in the range of 85 to 95°).

[0020] The electrolytic capacitor of the present disclosure may satisfy the following feature (1). (1) The first upright portion of the anode lead terminal includes a lower portion connecting the lower ends of the two exposed portions, and the bent portion extends from the lower portion. With this configuration, the length of the bent portion can be shortened. Therefore, it is possible to reduce deformation of the bent portion compared to the elongated anode connecting portion of Patent Document 2, which has a length from the anode terminal portion to the tantalum wire (anode lead). Therefore, with this configuration, the anode lead terminal and the anode lead can be connected with particularly high reliability.

[0021] In addition to the above feature (1), the electrolytic capacitor of the present disclosure may also satisfy the following features (2) to (4). These features can increase the mechanical strength of the first upright portion. (2) The first upright portion of the anode lead terminal includes an upper portion that connects the upper ends of the two exposed portions. (3) The anode lead terminal is formed by processing a single metal sheet. (4) The bent portion of the anode lead terminal is formed by bending a metal sheet surrounded by the two exposed portions and the upper and lower portions.

[0022] The electrolytic capacitor of the present disclosure may have the following configurations (5) to (7). (5) The capacitor element has a second end face opposite to the first end face (E1) and a side peripheral surface connecting the periphery of the first end face (E1) and the periphery of the second end face. Hereinafter, the second end face may be referred to as the "second end face (E2)." (6) The cathode lead terminal includes a cathode terminal portion exposed at the bottom surface (B) and a second upright portion rising from the cathode terminal portion and exposed at the rear surface (R). That is, the cathode terminal portion and the second upright portion are continuous and exposed at the corner between the bottom surface (B) and the rear surface (R). (7) The cathode lead terminal and the capacitor element are connected via a conductive member arranged between the second upright portion and the second end face (E2) and / or between the cathode terminal portion and the side peripheral surface.

[0023] According to the above configurations (5) to (7), there is no need to dispose an exterior body between the second end face (E2) and the rear face (R). Therefore, the ratio (volume ratio) of the capacitor element in the electrolytic capacitor can be increased, and the capacity of the electrolytic capacitor can be increased. Furthermore, according to the above configurations (5) to (7), the area that can be soldered can be increased in the cathode terminal as in the anode terminal. Therefore, the electrolytic capacitor can be mounted on a board or the like with higher reliability. Furthermore, according to the above configurations (5) to (7), the area of ​​the conductive member that can be disposed between the cathode part and the cathode lead terminal can be increased, and therefore the electrical resistance between them can be reduced. Moreover, by disposing the first and second standing parts on the surface of the exterior body, it is possible to prevent moisture and the like from reaching the capacitor element. Therefore, the reliability of the electrolytic capacitor can be improved.

[0024] The anode lead may have a round bar shape, and the groove of the anode lead terminal may have an arc shape that follows the transverse outer periphery of the round bar shape of the anode lead. Since the anode lead has a round bar shape and the groove of the anode lead terminal has an arc shape that follows the transverse outer periphery of the round bar shape, the anode lead is more easily fixed in position in the groove.

[0025] (Capacitor element) The capacitor element includes a columnar element portion having the above-mentioned first end face, and an anode lead protruding from the first end face of the element portion toward the front surface (F). The element portion may be cylindrical or prismatic. There are no particular limitations on the capacitor element. The capacitor element may be a capacitor element used in a known solid electrolytic capacitor or a capacitor element having a similar configuration. The electrolytic capacitor of the present disclosure may include multiple capacitor elements. In this case, multiple capacitor elements may be used. element The anode portion is electrically connected to an anode lead terminal via an anode lead.

[0026] An example of a capacitor element includes an anode part and a cathode part. The anode part includes an anode body having a dielectric layer formed on the surface thereof and an anode lead, and the cathode part includes an electrolyte layer and a cathode layer. The electrolyte layer is disposed between the dielectric layer formed on the surface of the anode body and the cathode layer. There are no particular limitations on these components, and components used in known solid electrolytic capacitors may be applied. Examples of these components are described below.

[0027] (Anode body) The anode body may be, for example, a columnar (e.g., rectangular) porous sintered body obtained by sintering particles of the material. Examples of the particles include particles of valve metal, particles of alloy containing valve metal, and particles of compound containing valve metal. These particles may be used alone or in combination of two or more. Examples of the valve metal include titanium (Ti), tantalum (Ta), and niobium (Nb). Alternatively, the anode body may be formed by roughening the surface of a base material (e.g., a foil-like or plate-like base material) containing a valve metal by etching or the like.

[0028] The anode part may be produced by the following method. First, a part of the anode lead is embedded in a metal powder, which is the material of the anode body, and the metal powder is pressure-molded into a columnar shape (e.g., a rectangular parallelepiped shape). The metal powder is then sintered to form the anode body. In this manner, an anode part including the anode body and the anode lead, part of which is embedded in the anode body, can be produced.

[0029] The dielectric layer formed on the surface of the anode body is not particularly limited, and may be formed by a known method. For example, the dielectric layer may be formed by immersing the anode body in a chemical conversion solution to anodize the surface of the anode body. Alternatively, the dielectric layer may be formed by heating the anode body in an oxygen-containing atmosphere to oxidize the surface of the anode body.

[0030] (anode lead) The anode lead may be a wire (anode wire) made of a metal. Examples of materials for the anode lead include the above valve metals, copper, aluminum, and aluminum alloys. A part of the anode lead is embedded in the anode body, and the remaining part protrudes from the anode body. The cross-sectional shape of the anode lead is not particularly limited, and may be a circle, an ellipse, a track shape (a shape consisting of two parallel straight lines and two arcs connecting the ends of these straight lines), a rectangle, a polygon, and the like. The cross-sectional shape of the anode lead may vary depending on the location. For example, the anode wire may have a circular cross section near the protrusion from the anode body, but may have a flat plate shape crushed from the circumferential direction at the tip end connected to the anode lead wire.

[0031] The tip of the anode lead protruding from the anode body is connected to the groove in the bent portion of the anode lead terminal. The tip may have a shape different from that of the groove. Alternatively, the tip may have a shape that fits into the groove. For example, when the groove has a shape that includes an arc, the tip may be circular.

[0032] (electrolyte layer) The electrolyte layer is not particularly limited, and an electrolyte layer used in a known solid electrolytic capacitor may be applied. In this specification, the electrolyte layer may be read as a solid electrolyte layer, and the electrolytic capacitor may be read as a solid electrolytic capacitor. The electrolyte layer may be a laminate of two or more different electrolyte layers.

[0033] The electrolyte layer is disposed so as to cover at least a part of the dielectric layer. The electrolyte layer may be formed using a manganese compound or a conductive polymer. Examples of the conductive polymer include polypyrrole, polythiophene, polyaniline, and derivatives thereof. These may be used alone or in combination. The conductive polymer may be a copolymer of two or more monomers. The derivative of a conductive polymer means a polymer having a conductive polymer as a basic skeleton. For example, an example of a polythiophene derivative includes poly(3,4-ethylenedioxythiophene).

[0034] A dopant may be added to the conductive polymer. The dopant may be selected according to the conductive polymer, and a known dopant may be used. Examples of the dopant include naphthalenesulfonic acid, p-toluenesulfonic acid, polystyrenesulfonic acid, and salts thereof. An example of the electrolyte layer is formed using poly(3,4-ethylenedioxythiophene) (PEDOT) doped with polystyrenesulfonic acid (PSS).

[0035] The electrolyte layer containing the conductive polymer may be formed by polymerizing a raw material monomer on the dielectric layer, or by applying a liquid containing the conductive polymer (and a dopant, if necessary) to the dielectric layer and then drying it.

[0036] (cathode layer) The cathode layer may be a conductive layer formed on the electrolyte layer, for example, a conductive layer formed so as to cover the electrolyte layer. The cathode layer may include a carbon layer formed on the electrolyte layer and a metal paste layer formed on the carbon layer. The carbon layer may be formed of a conductive carbon material such as graphite and a resin. The metal paste layer may be formed of metal particles (for example, silver particles) and a resin, for example, a known silver paste.

[0037] The cathode layer is electrically connected to a cathode lead terminal. The cathode layer may be electrically connected to the cathode lead terminal via a conductive member. The conductive member may be formed of metal particles (e.g., silver particles) and a resin, and may be formed of, for example, a known silver paste.

[0038] The cathode layer may configure a second end face (E2) opposite to the first end face (E1). The second end face (E2) may be connected to the second upright portion of the cathode lead terminal via a conductive member. The cathode layer may be connected to the cathode terminal portion via a conductive member. The cathode layer may be connected to both the cathode terminal portion and the second upright portion via a conductive member.

[0039] (Exterior body) The exterior body is disposed around the capacitor element so that the capacitor element is not exposed on the surface of the electrolytic capacitor. Furthermore, the exterior body insulates the anode lead terminal and the cathode lead terminal. The exterior body may be a known exterior body used for electrolytic capacitors. For example, the exterior body may be formed using an insulating resin material used for sealing the capacitor element. Examples of the material of the exterior body include epoxy resin, phenol resin, silicone resin, melamine resin, urea resin, alkyd resin, polyurethane, polyimide, and unsaturated polyester. The resin material constituting the exterior body may include a substance other than resin (such as an inorganic filler). The exterior body may include a case disposed on at least a part of the surface of the exterior body.

[0040] An example of the electrolytic capacitor of the present disclosure will be specifically described below with reference to the drawings. The above-mentioned components can be applied to the components of the electrolytic capacitor of the example described below. In addition, the components of the electrolytic capacitor of the example described below can be modified based on the above description. End Explained in did Matters, As explained below In the embodiments described below, components that are not essential to the electrolytic capacitor of the present disclosure may be omitted.

[0041] (Embodiment 1) FIG. 1 is a schematic perspective view of electrolytic capacitor 100 of embodiment 1. FIG. 2 is a schematic front view of electrolytic capacitor 100 as viewed from first upright portion 122 of anode lead terminal 120. FIG. 3 is a schematic cross-sectional view passing through anode lead (anode wire) 112. For ease of understanding, some components may be shown only by outline in the following drawings. Also, some components may be omitted from the drawings.

[0042] 3, electrolytic capacitor 100 includes a capacitor element 110, an exterior body 101, an anode lead terminal 120, a cathode lead terminal 130, and a conductive member 141 (see FIG. 3). Exterior body 101 is formed to surround capacitor element 110.

[0043] The electrolytic capacitor 100 has a bottom surface 100b, a front surface 100f rising from the bottom surface 100b, a rear surface 100r opposite the front surface, and a top surface 100t opposite the bottom surface 100b. The capacitor element 110 has a first end surface 110a facing the front surface 100f, and a second end surface 110b opposite the first end surface 110a. The capacitor element 110 further has a side surface 110s connecting the periphery of the first end surface 110a and the periphery of the second end surface 110b. The side surface 110s includes a bottom surface 110sb on the bottom surface 100b side, a top surface 110st on the top surface 100t side, and two side surfaces 110ss. The capacitor element 110 includes an anode lead 112 protruding from the end surface 110a toward the front surface 100f.

[0044] 1, anode lead terminal 120 includes an anode terminal portion 121 exposed at bottom surface 100b, and a first upright portion 122 rising from anode terminal portion 121. First upright portion 122 includes two exposed portions 122a, a lower portion 122b, an upper portion 122c, and a bent portion 122d.

[0045] The two exposed portions 122a are connected to the anode terminal portion 121 and are exposed at the front surface 100f. The lower portion 122b connects the lower ends of the two exposed portions 122a and is connected to the anode terminal portion 121. The upper portion 122c connects the upper ends of the two exposed portions 122a. The portion of the first upright portion 122 excluding the bent portion 122d has a square frame shape.

[0046] The bent portion 122d is disposed between the two exposed portions 122a. The bent portion 122d has a groove portion 122dg at its tip. The bent portion 122d extends from the lower portion 122b and bends toward the first end surface 110a. Specifically, the bent portion 122d extends from the lower portion 122b toward the first end surface 110a, and then extends toward the upper surface 100t.

[0047] Of bent portion 122d, the tip portion in which groove portion 122dg is formed may be approximately perpendicular to the surface (exposed surface) of anode terminal portion 121. Specifically, angle A (see FIG. 4) between direction D in which tip portion in which groove portion 122dg is formed extends and surface 121s of anode terminal portion 121 may be in the range of 80 to 100°. FIG. 4 is a cross section perpendicular to bottom surface 100b and passing through the central axis of anode lead 112, similar to FIG. 3. Note that hatching of some members is omitted in FIG. 4.

[0048] Groove 122dg of bent portion 122d is embedded in exterior body 101. The tip of anode lead 112 is also embedded in exterior body 101. Groove 122dg is connected to anode lead 112 by welding or the like. In order to prevent moisture or the like from entering the interior of exterior body 101 and adversely affecting capacitor element 110, it is preferable that the connection portion between bent portion 122d and anode lead 112 is away from front surface 100f. On the other hand, if the connection portion is too far from front surface 100f, it may be difficult to achieve high capacitance. Taking these factors into consideration, the distance from front surface 100f to groove 122dg may be in the range of 50 μm to 400 μm (for example, in the range of 100 μm to 300 μm).

[0049] Referring to FIG. 2, anode terminal portion 121 In The height from the surface 121s to the anode lead 112 may be higher than the height h1 from the surface 121s to the upper end of the lower part 122b of the standing portion 122, and may be lower than the height h2 from the surface 121s to the lower end of the upper part 122c of the standing portion 122.

[0050] 2, the width Wa of each of the two exposed portions 122a may be in the range of 20 to 40% of the width W of the standing portion 122. The width Wd of the bent portion 122d may be in the range of 20 to 40% of the width W of the standing portion 122.

[0051] The anode lead terminal 120 and the cathode lead terminal 130 can each be formed by processing one metal sheet. The bent portion 122d can be formed by removing a part of the metal sheet around the bent portion 122d and folding the part of the metal sheet that will become the bent portion 122d. Note that the bent portion 122d may be formed without removing the metal sheet around the part that will become the bent portion 122d. However, it is preferable to remove a part of the metal sheet around the bent portion 122d in order to make it easier to arrange an exterior body (e.g., molded resin).

[0052] 1 to 3, an example in which upright portion 122 includes upper portion 122c has been described, but upright portion 122 does not have to include upper portion 122c. A front view of an example of such an electrolytic capacitor 100a is shown in Fig. 5. With electrolytic capacitor 100a, the same effects as with electrolytic capacitor 100 can be obtained.

[0053] 3, capacitor element 110 includes an anode portion 111 and a cathode portion 115. Anode portion 111 includes an anode body 113 having a dielectric layer 114 formed on a surface thereof, and an anode lead 112. Cathode portion 115 includes an electrolyte layer 116 disposed so as to cover dielectric layer 114, and a cathode layer 117. Cathode layer 117 includes, for example, a carbon layer formed on electrolyte layer 116, and a metal particle layer formed on the carbon layer. The metal particle layer is a layer formed using, for example, a metal paste.

[0054] The cathode lead terminal 130 includes a cathode terminal portion 131 and a second upright portion 132. The cathode terminal portion 131 is exposed at the bottom surface 100b. The second upright portion 132 rises from the cathode terminal portion 131 and is exposed at the rear surface 100r. In the electrolytic capacitor 100, the second upright portion 132 and the cathode portion 115 (specifically, the cathode layer 117) are connected by a conductive member 141. The conductive member 141 is a layer formed using, for example, a metal paste.

[0055] As described above, anode portion 111 of capacitor element 110 is electrically connected to anode lead terminal 120, and cathode portion 115 of capacitor element 110 is electrically connected to cathode lead terminal 130. When electrolytic capacitor 100 is mounted on a substrate or the like of an electronic device, anode terminal portion 121 and cathode terminal portion 131 may be mounted by soldering them together.

[0056] 6, the cathode lead terminal 130 and the capacitor element 110 may be connected to each other via a conductive member 141 arranged between the cathode terminal portion 131 and the side peripheral surface 110s (specifically, the bottom surface 110sb) of the capacitor element 110. Alternatively, as shown in FIG 7, the cathode lead terminal 130 and the capacitor element 110 may be connected to each other via a conductive member 141 arranged between the cathode terminal portion 131 and the side peripheral surface 110s (specifically, the bottom surface 110sb) of the capacitor element 110 and a conductive member 141 arranged between the second standing portion 132 and the second end surface 110b.

[0057] An example of a method for manufacturing the electrolytic capacitor 100 is described below. First, the capacitor element 110, the anode lead terminal 120, and the cathode lead terminal 130 are prepared. The method for manufacturing the capacitor element 110 is not particularly limited, and the capacitor element 110 can be manufactured by a known method. The anode lead terminal 120 and the cathode lead terminal 130 can be formed by a known metal processing method. In one example of forming the anode lead terminal 120, first, a part around the bent portion 122d and the groove portion 122dg of the metal sheet that will become the anode lead terminal 120 are punched out and removed, and the portion that will become the bent portion 122d is formed by press processing. Next, the metal sheet is folded at the boundary between the first upright portion 122 and the anode terminal portion 121 so that the first upright portion 122 rises from the anode terminal portion 121. In this manner, the anode lead terminal 120 can be formed.

[0058] Next, the anode lead 112 and the anode lead terminal 120 are connected, and the cathode layer 117 and the cathode lead terminal 130 are connected. The anode lead 112 and the anode lead terminal 120 can be connected, for example, by placing the tip of the anode lead terminal 120 in the groove portion 122dg of the bent portion 122d and then welding the two together. The cathode layer 117 and the cathode lead terminal 130 can be connected, for example, by the following method. First, a metal paste is applied to the second upright portion 132 of the cathode lead terminal 130 and / or the second end face 110b (the surface of the cathode layer 117) of the capacitor element 110. Next, after bonding the two together via the metal paste, the metal paste is converted into a conductive member 141 by heating. In this manner, the cathode layer 117 and the cathode lead terminal 130 can be connected.

[0059] Next, the capacitor element is sealed with the material of the exterior body 101 (e.g., a molding resin). The sealing process can be performed by a known method. In this manner, the electrolytic capacitor 100 can be manufactured. Note that other electrolytic capacitors of the present disclosure can also be manufactured by a similar manufacturing method. [Industrial Applicability]

[0060] The present disclosure can be used for electrolytic capacitors. [Explanation of symbols]

[0061] 100, 100A: electrolytic capacitor 100b: Bottom 100f: Front 100r: Rear 101: Exterior body 110: Capacitor element 110a: First end face 110b: second end face 110s: Side surface 112: Anode lead (anode wire) 120: Anode lead terminal 121:Anode terminal part 121s: Surface (surface of anode terminal) 122: First standing part 122a: Exposed part 122b: Bottom 122c: Upper part 122d: Bending part 122dg:Groove 130: Cathode lead terminal 131: Cathode terminal 132: Second standing part 141: Conductive material

Claims

1. 1. An electrolytic capacitor having a bottom surface, a front surface rising from the bottom surface, and a rear surface opposite the front surface, a capacitor element having a first end surface opposite the front surface; an anode lead terminal and a cathode lead terminal electrically connected to the capacitor element; an exterior body disposed around the capacitor element; the capacitor element includes an anode lead extending from the first end surface toward the front surface; the anode lead terminal includes an anode terminal portion exposed at the bottom surface and a first upright portion rising from the anode terminal portion, the first raised portion includes two exposed portions connected to the anode terminal portion and exposed on the front surface, and a bent portion disposed between the two exposed portions and having a groove at a tip thereof, the bent portion is bent toward the first end surface so that the groove portion is disposed in the exterior body, the anode lead is connected to the groove of the bent portion, the first upright portion includes a lower portion connecting lower ends of the two exposed portions, The bent portion extends from the lower portion, the first raised portion includes an upper portion connecting upper ends of the two exposed portions, the anode lead terminal is formed by processing a single metal sheet, An electrolytic capacitor, wherein the bent portion is formed by bending a portion of the metal sheet surrounded by the two exposed portions, the upper portion, and the lower portion.

2. 2. The electrolytic capacitor according to claim 1, wherein the tip of the bent portion, in which the groove is formed, extends substantially perpendicular to a surface of the anode terminal portion.

3. the capacitor element has a second end face opposite to the first end face, and a side circumferential surface connecting a periphery of the first end face and a periphery of the second end face, the cathode lead terminal includes a cathode terminal portion exposed at the bottom surface and a second upright portion rising from the cathode terminal portion and exposed at the rear surface, 3. The electrolytic capacitor according to claim 1, wherein the cathode lead terminal and the capacitor element are connected via at least one of a conductive member disposed between the second upright portion and the second end face and a conductive member disposed between the cathode terminal portion and the side circumferential surface.

4. The electrolytic capacitor according to any one of claims 1 to 3, wherein the anode lead has a round bar shape, and the groove portion of the anode lead terminal has an arc shape that follows a transverse outer periphery of the round bar shape of the anode lead.

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