Thin, high-capacitance solid-state multilayer aluminum electrolytic capacitors

Abstract

This invention achieves thinness and low resistance, providing a small, high-capacity solid-state multilayer aluminum electrolytic capacitor. [Solution] In a thin solid laminated aluminum electrolytic capacitor, the laminated core 2 is enclosed inside the outer shell 1 by laminating and fixing multiple electrode sheets. The electrode sheets are based on valve metal foil, with one end being the anode region 2011 and the other end being the cathode region 2012. An insulation rubber 2013 separates the anode region and the cathode region. The anode lead frame is fitted to the bottom of the outer shell, with its upper end electrically connected to the anode end of the laminated core, and its lower end exposed as the anode terminal 302 by penetrating the bottom of the outer shell. The cathode lead frame is fitted to the bottom of the outer shell, with its upper end electrically connected to the cathode end of the laminated core, and its lower end exposed as the cathode terminals 403 and 404 by penetrating the bottom of the outer shell. By fitting the positive and negative lead frames to the bottom of the outer shell, there is no need to bend them as electrode terminals.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum electrolytic capacitors, and particularly to a thin and high-capacity solid laminated aluminum electrolytic capacitor.

Background Art

[0002] Multilayer capacitors are mainly used in electronic products. As electronic products and electronic components become thinner, the capacitors are also becoming thinner. In a conventional multilayer aluminum electrolytic capacitor, in terms of structure and manufacturing process, a multilayer core is mainly connected to cathode pins and anode pins, and then the multilayer core is wrapped with a plastic outer shell. The anode pins and cathode pins extending from both sides of the outer shell are bent along the side of the outer shell toward the bottom of the outer shell, and then the anode pins and cathode pins are bent again toward the bottom surface of the outer shell so as to be in close contact with the bottom surface of the outer shell, thereby obtaining a multilayer aluminum electrolytic capacitor.

[0003] Conventional multilayer capacitors have a problem that they cannot be thinned because it is necessary to bend the lead frame twice to form electrode terminals after encapsulation. If the thickness of the multilayer capacitor body is too thin, when bending the pins, the multilayer capacitor structure will be damaged due to the compression of the bending force, which may cause the capacitor to rupture or malfunction. Therefore, the volume of conventional multilayer capacitors cannot be miniaturized and thinned. Currently, in the industry, in order to meet the requirement of thinning, efforts are being made to reduce the number of electrode sheets to be laminated to make the total thickness of the multilayer capacitor thinner. However, this method reduces the capacitance and particularly affects the characteristics of the capacitor in terms of resistance, making it difficult to meet the needs of electronic products. Therefore, in the structure and process of conventional multilayer capacitors, it is impossible to have both the characteristics of small size and large capacitance, and it is difficult to meet the current demand for thinning of electronic products.

Summary of the Invention

[0004] Therefore, there is a need to provide a thin, high-capacitance solid-state multilayer aluminum electrolytic capacitor. By fitting the flattened positive and negative lead frames on the substrate into the bottom of the outer shell, it is not necessary to bend them to form the electrode lead terminals, allowing for further thinning. This enables the lamination of more electrode sheets within a limited space, and maximizes the contact area between the positive and negative lead frames and the laminated core. This achieves ultra-lightweight, thin, and low-resistance products, resulting in a capacitor that is small yet possesses high capacitance. This solves the problem that conventional capacitors cannot be thinned or miniaturized due to the pin bending process.

[0005] The present invention solves the technical problem by the following technical means.

[0006] A thin, high-capacitance solid-state multilayer aluminum electrolytic capacitor comprising an outer shell, a multilayer core, an anode lead frame, and a cathode lead frame, The laminated core is constructed by stacking and fixing multiple electrode sheets, the laminated core is enclosed inside an outer shell, the electrode sheets are based on valve metal foil, one end is an anode region and the other end is a cathode region, and there is insulation rubber at the boundary between the anode and cathode regions to separate them. A thin, high-capacitance solid laminated aluminum electrolytic capacitor, wherein the anode lead frame is fitted to the bottom of the outer shell, the upper end surface of the anode lead frame is electrically connected to the anode end of the laminated core, and the lower end surface penetrates the bottom surface of the outer shell and is exposed as an anode lead terminal, and the cathode lead frame is fitted to the bottom of the outer shell, the upper end surface of the cathode lead frame is electrically connected to the cathode end of the laminated core, and the lower end surface penetrates the bottom surface of the outer shell and is exposed as a cathode lead terminal.

[0007] Preferably, the upper end surface of the anode lead frame is provided as an anode connection base, and the lower end surface of the anode lead frame is provided as an anode terminal. The anode connection base contacts the anode end of the laminated core to form an electrical connection, and the anode terminal penetrates the bottom surface of the outer shell and is exposed, with the exposed portion fitted to the bottom surface of the outer shell.

[0008] Preferably, the upper end surface of the cathode lead frame is provided as a cathode connection base, and the lower end surface of the cathode lead frame is provided as a first cathode terminal and a second cathode terminal, with a recess provided between the first cathode terminal and the second cathode terminal, the cathode connection base contacting the cathode end of the laminated core to form an electrical connection, the surface of the recess is covered by the bottom surface of the outer shell, the first cathode terminal and the second cathode terminal are exposed by penetrating the bottom surface of the outer shell, and the exposed portions are fitted into the bottom surface of the outer shell.

[0009] Preferably, an anode bend is provided at the end of the anode terminal that extends along the longitudinal direction of the bottom surface of the outer shell, and an anode groove is provided on the inside of the joint between the anode bend and the anode terminal, and the inside of the anode bend is in close contact with the side wall of the outer shell.

[0010] Preferably, a cathode bent portion is provided at the end of the cathode second terminal that extends along the longitudinal direction of the bottom surface of the outer shell, a cathode groove is provided on the inside of the joint between the cathode bent portion and the cathode second terminal, and the inside of the cathode bent portion is in close contact with the side wall of the outer shell.

[0011] Preferably, walls are provided at the extended ends on both sides of the upper end face in the width direction of the cathode lead frame, the inside of the walls contact the side wall of the cathode end of the laminated core to form an electrical connection, and the outside of the walls penetrate the side surface of the outer shell and are exposed as electrode lead terminals.

[0012] Preferably, a metal plating layer is provided on the upper end surface of the anode lead frame, and a metal plating layer is provided on both the upper end surface and the inner side of the wall portion of the cathode lead frame.

[0013] Preferably, the valve metal foil is one of aluminum foil, copper foil, silver foil, or tantalum foil.

[0014] The advantages and beneficial effects of the present invention are as follows. The present invention provides a thin, high-capacitance solid-state multilayer aluminum electrolytic capacitor that solves the problem of the prior art, where the pin bending process is limited by size constraints, preventing the manufacture of small, high-capacitance multilayer capacitors. Compared to the prior art, the advantages of the present invention are as follows.

[0015] By fitting the flattened positive and negative lead frames into the bottom of the outer shell, there is no need to bend them to form electrode lead terminals. As a result, there is no need to bend the positive and negative lead frames after encapsulation, so the external size of the product is not limited by bending, the volume of the product is reduced without changing the capacitance, enabling a thinner product, and the contact area between the positive and negative lead frames and the laminated core is maximized, the parallel resistance is effectively optimized, the area over which current flows is increased, and the generation of internal heat sources is reduced. By eliminating the need to bend the positive and negative lead frames and leading them outwards as is, the contact area between the positive and negative lead frames and the circuit board is maximized, the parallel resistance is optimized, the area over which current flows is increased, and the generation of external heat sources is reduced. By providing a metal plating layer on the inner end faces of the positive and negative lead frames, an effect of blocking electric fields is achieved, improving the stability and reliability of the laminated capacitor. The above design achieves a thinner product and lower resistance, resulting in a capacitor that is small yet has high capacitance. Safety and stability are improved, and the lifespan of multilayer aluminum electrolytic capacitors is extended. Furthermore, the manufacturing process is simple, operation is convenient, costs are low, and it can meet the current demand for thinner electronic products. [Brief explanation of the drawing]

[0016] To more clearly illustrate embodiments of the present invention or technical means in the prior art, the following drawings necessary for describing embodiments or the prior art will be briefly described. As will be clear, the following drawings are only a few embodiments of the present invention, and those skilled in the art can obtain other drawings based on the structures shown in these drawings without any creative effort.

[0017] [Figure 1]This is a schematic diagram illustrating the external appearance of the three-dimensional structure of the present invention. [Figure 2] Figure 1 is a schematic cross-sectional view of the present invention, line 1-1. [Figure 3] This is a schematic diagram of the three-dimensional internal structure of the outer shell of the present invention. [Figure 4] This is a schematic diagram illustrating the connection between the laminated core of the present invention, the anode lead frame, and the cathode lead frame. [Figure 5] This is a schematic diagram of the three-dimensional structure of the anode lead frame and cathode lead frame of the present invention. Explanation of symbols: 1, outer shell; 2, laminated core; 3, anode lead frame; 4, cathode lead frame; 5, metal plating layer; 201, electrode sheet; 301, anode connection base; 302, anode terminal; 303, anode bend; 304, anode groove; 401, cathode connection base; 402, wall; 403, cathode first terminal; 404, cathode second terminal; 405, cathode bend; 406, recess; 407, cathode groove; 2011, anode region; 2012, cathode region; 2013, insulation rubber. [Modes for carrying out the invention]

[0018] The technical concepts in the embodiments of the present invention will be described clearly and completely below with reference to the drawings of the embodiments of the present invention, and it is clear that the embodiments described are only a part of the embodiments of the present invention, not all embodiments. The description of at least one exemplary embodiment below is for practical purposes only and does not limit the present invention or its applications or use. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of the present invention are within the scope of the protection of the present invention.

[0019] In this description of the present invention, the directions or positional relationships indicated by terms such as "both sides," "up," "down," "top," "bottom," "inside," and "outside" are based on the directions or positional relationships shown in the drawings and are merely for the convenience and simplification of the description of the present invention. They do not indicate or imply that the specified device or component has a particular direction or must be configured and operated in a particular direction, and should not be understood as limiting the present invention. In this description of the present invention, unless otherwise specified, "multiple" means two or more. Also, the term "including" and any variation thereof all mean "including at least."

[0020] In this description of the present invention, terms such as "first," "second," etc., indicate distinction and do not refer to a sequential order. In this description of the present invention, unless otherwise specifically defined and limited, the terms "attachment," "connection," and "connection" should be understood in a broad sense, for example, they may be fixed connections, removable connections, integrally molded connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, or internal communication between two assemblies. Those skilled in the art will be able to specifically understand the concrete meaning of the above terms in this invention.

[0021] As shown in Figures 1 and 2, the thin, high-capacitance solid-state multilayer aluminum electrolytic capacitor includes an outer shell 1, a multilayer core 2, an anode lead frame 3, and a cathode lead frame 4. The multilayer core 2 is constructed by stacking a plurality of electrode sheets 201 in correspondence. The multilayer core 2 is enclosed inside the outer shell 1. The electrode sheets 201 are based on metal foil, with one end being the anode region 2011 and the other end being the cathode region 2012. An insulation rubber 2013 separates the anode region 2011 and the cathode region 2012. The anode lead frame 3 is fitted into the bottom of the outer shell 1. The upper end surface of the anode lead frame 3 is electrically connected to the anode end of the multilayer core 2, and the lower end surface is exposed from the bottom surface of the outer shell 1 and drawn out as the anode. The cathode lead frame 4 is fitted into the bottom of the outer shell 1. The cathode lead frame 4 has its upper end surface electrically connected to the cathode terminal of the laminated core 2, and its lower end surface penetrates the bottom surface of the outer shell 1 and is exposed as a cathode lead terminal.

[0022] The electrode sheet 201 is based on a valve metal foil, with one end being the anode region 2011 and the other end being the cathode region 2012. An insulation rubber 2013 separates the anode region 2011 and the cathode region 2012. Specifically, the valve metal foil is one of aluminum foil, copper foil, silver foil, or tantalum foil. In this embodiment, the valve metal foil is aluminum foil, with an oxide film formed on the outer surface of the cathode region 2012, a conductive polymer layer formed on the outer surface of the oxide film, a carbon layer formed on the surface of the conductive polymer layer, and a metal paste layer applied to the surface of the carbon layer. In this embodiment, a silver paste layer is used. The anode region 2011 and the cathode region 2012 are insulated and separated by the insulation rubber 2013. The laminated core 2 is constructed by laminating and fixing multiple electrode sheets 201 in correspondence. The laminated core 2 consists of at least one electrode sheet 201. The number of laminated electrode sheets 201 is determined by the actual application. After stacking multiple electrode sheets 201, the anode regions 2011 between adjacent electrode sheets 201 are fixed in parallel to form the anode end of the stacked core 2, and the cathode regions 2012 between adjacent electrode sheets are bonded and solidified with silver paste and connected in parallel to form the cathode end of the stacked core 2.

[0023] The upper end surface of the anode lead frame 3 is connected and fixed to the lower end surface of the anode end of the laminated core 2 and drawn out as an anode. The upper end surface of the cathode lead frame 4 is connected and fixed to the lower end of the cathode end of the laminated core 2. By performing injection encapsulation molding on the laminated core 2, the anode lead frame 3, and the cathode lead frame 4, a laminated aluminum electrolytic capacitor sealed and wrapped by the outer shell 1 is obtained. The entire lower end surface of the anode lead frame 3 penetrates the bottom surface of the outer shell 1 and is exposed as an anode lead-out terminal. The lower end surface of the cathode lead frame 4 penetrates the bottom surface of the outer shell 1 and is exposed as a cathode lead-out terminal. The exposed portion can be directly used as a welding pin drawn from the cathode and the anode. Since there is no need to bend the exposed portion, the external appearance size of the capacitor can be made thinner and smaller. Since the outer shell 1 is integrally injection-molded, the connection portions between the side portions of the anode lead frame 3 and the cathode lead frame 4 and the outer shell 1 have sealing performance and firmness.

[0024] Preferably, the upper end surface of the anode lead frame 3 is provided as an anode connection base 301, and the lower end surface of the anode lead frame 3 is provided as an anode terminal 302. The anode connection base 301 contacts the anode end of the laminated core 2 to form an electrical connection. The anode terminal 302 penetrates the bottom surface of the outer shell 1 and is exposed. The exposed portion is fitted to the bottom surface of the outer shell 1.

[0025] Specifically, the upper surface of the anode connection base 301, which is the upper end surface of the anode lead frame 3, is perfectly matched and connected to the lower surface of the anode end of the laminated core 2, thereby increasing the contact area between the anode lead frame 3 and the anode end of the laminated core 2. This effectively optimizes the anode parallel resistance, increases the area over which current flows, reduces the generation of internal heat sources, and improves stability. The anode terminal 302 at the lower end of the anode lead frame 3 is structurally in an upper-lower relationship with the anode connection base 301 at the upper end, eliminating the need to bend the anode terminal 302, further reducing its size and improving space utilization. With this structure, the current transmission distance is shortened, electrical transmission performance is improved, the area of ​​the anode terminal 302 is maximized, and the welding stability and heat transfer between the anode terminal 302 and the circuit board are improved.

[0026] Preferably, as shown in Figure 1, the upper end surface of the cathode lead frame 4 is provided as a cathode connection base 401. The lower end surface of the cathode lead frame 4 is provided as a first cathode terminal 403 and a second cathode terminal 404. A recess 406 is provided between the first cathode terminal 403 and the second cathode terminal 404. The cathode connection base 401 contacts the cathode end of the laminated core 2 to form an electrical connection. The surface of the recess 406 is covered by the bottom surface of the outer shell 1. The first cathode terminal 403 and the second cathode terminal 404 are exposed by passing through the bottom surface of the outer shell 1. The exposed portions are fitted into the bottom surface of the outer shell 1.

[0027] Specifically, as shown in Figure 4-5, the surface of the cathode connection base 401 on the upper end of the cathode lead frame 4 perfectly matches and connects to the lower surface of the cathode end of the laminated core 2, thereby increasing the contact area between the cathode lead frame 4 and the cathode end of the laminated core 2. This effectively optimizes the cathode parallel resistance, increases the area over which current flows, reduces the generation of heat sources inside the negative electrode, and improves stability.

[0028] The cathode first terminal 403 and cathode second terminal 404 at the lower end of the cathode lead frame 4 are structurally in an upper-lower relationship with the cathode connection base 401 at the upper end. The upper ends of the cathode first terminal 403 and cathode second terminal 404 are flush with the cathode connection base 401.

[0029] The cathode terminal 1 403 and cathode terminal 2 404 do not need to be bent, allowing for further miniaturization and improved space utilization. With this structure, the current transmission distance is shortened, electrical transmission performance is improved, and the area of ​​cathode terminal 1 403 and cathode terminal 2 404 is maximized, improving welding stability and heat transfer between cathode terminal 1 403 and cathode terminal 2 404 and the circuit board.

[0030] By providing a recess 406 and covering the surface of the recess 406 with the bottom surface of the outer shell 1, the cathode lead frame 4 is positioned, preventing it from moving outward, further improving the rigid connection between the cathode lead frame 4 and the outer shell 1, and further improving the sealing performance between the cathode lead frame 4 and the outer shell 1.

[0031] In some embodiments, as shown in Figures 1 and 2, an anode bend 303 is provided at the end of the anode terminal 302 that extends along the longitudinal direction of the bottom surface of the outer shell 1. An anode groove 304 is provided on the inside of the joint between the anode bend 303 and the anode terminal 302. The inside of the anode bend 303 is in close contact with the side wall of the outer shell 1.

[0032] The anode bend portion 303 is provided at the end of the anode terminal 302 that extends along the length of the bottom surface of the outer shell 1, thereby further increasing the anode lead area. The inside of the anode bend portion 303 is in close contact with the side wall of the outer shell 1, improving the adhesion between the anode lead frame 3 and the outer shell. An anode groove 304 is provided on the inside of the joint between the anode bend portion 303 and the anode terminal 302. The structure of the anode groove 304 further extends the path for external moisture to enter, further improving the sealing performance. The structure of the anode groove 304 further strengthens the bond between the anode lead frame 3 and the outer shell 1, improving stable fixation. When installing and using the capacitor, the anode terminal 302 is welded to the circuit board in the horizontal direction, and the anode bend portion 303 is welded to the circuit board in the vertical direction. Multidirectional welding improves the stable fixation of the laminated aluminum electrolytic capacitor.

[0033] In some embodiments, as shown in Figures 1 and 2, a cathode bent portion 405 is provided at the end of the cathode second terminal 404 that extends along the longitudinal direction of the bottom surface of the outer shell 1. A cathode groove 407 is provided on the inside of the joint between the cathode bent portion 405 and the cathode second terminal 404. The inside of the cathode bent portion 405 is in close contact with the side wall of the outer shell 1.

[0034] A cathode bend 405 is provided at the end of the cathode second terminal 404 that extends along the length of the bottom surface of the outer shell 1, thereby further increasing the cathode lead area. The inside of the cathode bend 405 is in close contact with the side wall of the outer shell 1, improving the adhesion between the cathode lead frame 4 and the outer shell. A cathode groove 407 is provided on the inside of the joint between the cathode bend 405 and the cathode second terminal 404. The structure of the cathode groove 407 further extends the path for external moisture to enter, further improving the sealing performance. The structure of the cathode groove 407 further strengthens the bond between the cathode lead frame 4 and the outer shell 1, improving stable fixation. When installing and using, the cathode first terminal 403 and the cathode second terminal 404 are welded to the circuit board in the horizontal direction, and the cathode bend 405 is welded to the circuit board in the vertical direction. Multidirectional welding improves the stability and fixation of laminated aluminum electrolytic capacitors.

[0035] In some embodiments, preferably, wall portions 402 are provided at the extended ends on both sides of the upper end face in the width direction of the cathode lead frame 4. The inside of the wall portion 402 contacts the side wall of the cathode end of the laminated core 2 to form an electrical connection. The outside of the wall portion 402 penetrates the side surface of the outer shell 1 and is exposed as an electrode lead terminal.

[0036] Specifically, as shown in Figures 1, 3, and 5, the wall portion 402 is perpendicular to the upper end surface of the cathode lead frame 4. The number of wall portions 402 is not limited. In this embodiment, the wall portions 402 are two symmetrically arranged wall portions 402. When the electrode sheets 201 are stacked on the cathode connection base 401, the anode end side of the electrode sheet 201 contacts the inner surface of the wall portion 402. The inner surface of the wall portion 402 acts to connect the sides of the electrode sheet 201, improving the parallel effect between the electrode sheets 201 and reducing the equivalent series resistance (ESR) value between the electrode sheets. The outside of the wall portion 402 penetrates the outside of the outer shell 1 and is exposed as an electrode lead terminal. This increases the lead area of ​​the negative electrode, optimizes the equivalent parallel resistance, and improves the weldability and heat dissipation of the negative electrode.

[0037] In some embodiments, as shown in Figure 5, preferably, a metal plating layer 5 is provided on the upper end surface of the anode lead frame 3, and a metal plating layer 5 is provided on both the upper end surface of the cathode lead frame 4 and the inside of the wall portion 402. By providing a metal plating layer 5 on the upper end surface of the anode lead frame 3 and the upper end surface of the cathode lead frame 4, an effect of blocking the electric field is achieved, improving the stability and reliability of the multilayer capacitor.

[0038] In some embodiments, a conductive paste, such as silver paste, is applied to the upper end surface of the anode lead frame 3, the upper end surface of the cathode lead frame 4, and the inside of the wall portion 402. This fills the gap between the laminated core 2 and the anode connection base 301, cathode connection base 401, and wall portion 402, further improving the output contact area, effectively optimizing the parallel resistance, and improving the stability of the laminated aluminum electrolytic capacitor.

[0039] This design allows for thinner and lower-resistance capacitors without changing their capacitance, resulting in a capacitor that is both compact and high-capacitance. Safety and stability are improved, and the lifespan of multilayer aluminum electrolytic capacitors is extended. Furthermore, the manufacturing process is simple, operation is convenient, and costs are low, meeting the current demand for thinner electronic products.

[0040] The embodiments described in this invention are illustrative and not restrictive. Therefore, the present invention is not limited to the embodiments in the specific models. Other embodiments obtained by those skilled in the art based on the technical means of the present invention are also covered within the scope of this invention.

Claims

1. A thin, high-capacitance solid-state multilayer aluminum electrolytic capacitor comprising an outer shell (1), a multilayer core (2), an anode lead frame (3), and a cathode lead frame (4), The laminated core (2) is constructed by laminating and fixing a plurality of electrode sheets (201), the laminated core (2) is enclosed inside the outer shell (1), the electrode sheets (201) are based on valve metal foil, one end is an anode region (2011) and the other end is a cathode region (2012), and there is an insulation rubber (2013) at the boundary between the anode region (2011) and the cathode region (2012) to separate them. A thin, high-capacitance solid laminated aluminum electrolytic capacitor, characterized in that the anode lead frame (3) is fitted to the bottom of the outer shell (1), the upper end surface of the anode lead frame (3) is electrically connected to the anode terminal of the laminated core (2), and the lower end surface penetrates the bottom surface of the outer shell (1) and is exposed as an anode lead terminal; and the cathode lead frame (4) is fitted to the bottom of the outer shell (1), the upper end surface of the cathode lead frame (4) is electrically connected to the cathode terminal of the laminated core (2), and the lower end surface penetrates the bottom surface of the outer shell (1) and is exposed as a cathode lead terminal.

2. The upper end surface of the anode lead frame (3) is provided as an anode connection base (301), the lower end surface of the anode lead frame (3) is provided as an anode terminal (302), the anode connection base (301) contacts the anode end of the laminated core (2) to form an electrical connection, and the anode terminal (302) penetrates the bottom surface of the outer shell (1) and is exposed, and the exposed portion is fitted to the bottom surface of the outer shell (1), as described in claim 1.

3. The upper end surface of the cathode lead frame (4) is provided as a cathode connection base (401), the lower end surface of the cathode lead frame (4) is provided as a cathode first terminal (403) and a cathode second terminal (404), a recess (406) is provided between the cathode first terminal (403) and the cathode second terminal (404), the cathode connection base (401) contacts the cathode end of the laminated core (2) to form an electrical connection, the surface of the recess (406) is covered by the bottom surface of the outer shell (1), the cathode first terminal (403) and the cathode second terminal (404) are exposed by penetrating the bottom surface of the outer shell (1), and the exposed portions are fitted to the bottom surface of the outer shell (1), as described in claim 1.

4. The thin, high-capacitance solid laminated aluminum electrolytic capacitor according to claim 2, characterized in that an anode bend portion (303) is provided at the end of the anode terminal (302) that extends along the longitudinal direction of the bottom surface of the outer shell (1), an anode recess (304) is provided on the inside of the joint between the anode bend portion (303) and the anode terminal (302), and the inside of the anode bend portion (303) is in close contact with the side wall of the outer shell (1).

5. A thin, high-capacitance solid laminated aluminum electrolytic capacitor according to claim 3, characterized in that a cathode bent portion (405) is provided at the end of the cathode second terminal (404) that extends along the longitudinal direction of the bottom surface of the outer shell (1), a cathode recessed groove (407) is provided on the inside of the joint between the cathode bent portion (405) and the cathode second terminal (404), and the inside of the cathode bent portion (405) is in close contact with the side wall of the outer shell (1).

6. The thin, high-capacitance solid laminated aluminum electrolytic capacitor according to claim 1, characterized in that wall portions (402) are provided at the extending ends on both sides of the upper end surface in the width direction of the cathode lead frame (4), the inside of the wall portions (402) contact the side wall of the cathode end of the laminated core (2) to form an electrical connection, and the outside of the wall portions (402) penetrate the side surface of the outer shell (1) and are exposed as electrode lead terminals.

7. A thin, high-capacitance solid-state multilayer aluminum electrolytic capacitor according to claim 1, characterized in that a metal plating layer (5) is provided on the upper end surface of the anode lead frame (3), and a metal plating layer (5) is provided on both the upper end surface and the inside of the wall portion (402) of the cathode lead frame (4).

8. The thin, high-capacitance solid-state laminated aluminum electrolytic capacitor according to claim 1, characterized in that the valve metal foil is one of aluminum foil, copper foil, silver foil, and tantalum foil.

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