Ultrathin MLPC multi-terminal conductive polymer laminated capacitor

Abstract

The utility model relates to an ultrathin MLPC multi-terminal conductive polymer laminated capacitor, which comprises a shell and a core, and is characterized in that a positive terminal and a first negative terminal which are used for leading out electrodes are respectively arranged at two opposite ends outside the shell; the outer side of the bottom of the shell is provided with a second negative terminal for electrode lead-out; an accommodating cavity is formed in the shell; a core is arranged in the accommodating cavity; the periphery of the core is covered and sealed by the shell; the core consists of an anode region and a cathode region; the anode region is connected with the anode lead frame; one side, far away from the anode region, of the anode lead frame penetrates out of the shell and is connected with the anode terminal; the cathode region is connected with the cathode lead frame; one side, far away from the cathode region, of the cathode lead frame penetrates out of the shell and is connected with the first cathode terminal; the bottom of the cathode region is connected with a cathode lead-out piece; and the cathode lead-out piece penetrates out of the bottom of the shell and is connected with the second cathode terminal. And the parallel connection effect is improved, the ESR is reduced, the traditional size limitation is broken through, and the thin design of the capacitor is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to capacitor technical field especially a kind of super thin MLPC multi-terminal conductive polymer laminated capacitor. BACKGROUND

[0002] MLPC conductive polymer laminated capacitor is mainly applied to consumer electronics, such as computer, mobile phone, wearable device, medical equipment and the like, with the trend of thin type of electronic product, capacitor product size and process will follow up. The traditional MLPC capacitor is packaged with epoxy molding compound, the positive and negative poles of the core are led out by lead frame, and the lead frame outside the capacitor is bent to form positive and negative terminals. When the MLPC conductive polymer laminated capacitor product is miniaturized, such as the total thickness of the capacitor is less than 1.0mm, the product size is too small in the lead frame bending process, and the product structure strength cannot resist the processing stress, which may cause damage or breakage inside the product. Therefore, the traditional MLPC conductive polymer laminated capacitor cannot realize miniaturized design and mass production, and has the problems of poor parallel effect, high ESR value and the like, which cannot meet the industry demand. SUMMARY

[0003] To solve the above technical problems, the utility model provides a kind of super thin MLPC multi-terminal conductive polymer laminated capacitor, which breaks through the traditional size limit, realizes the thin type design of capacitor, improves the parallel effect, reduces ESR, solves the problem of traditional capacitor miniaturized design and mass production, and meets the demand in the industry.

[0004] The utility model solves its technical problem by adopting the following technical scheme:

[0005] A kind of super thin MLPC multi-terminal conductive polymer laminated capacitor, including shell, core, characterized by: the opposite two ends of the shell outside are respectively provided with positive terminal for electrode lead-out, first negative terminal;The outer side of the bottom of the shell is provided with second negative terminal for electrode lead-out;The shell is provided with containing cavity inside;The core is arranged in the containing cavity;The outer periphery of the core is covered and sealed by the shell;The core is composed of anode area and cathode area;The anode area is connected with anode lead frame;The anode lead frame is connected with the positive terminal by penetrating out of the shell away from the anode area side;The cathode area is connected with cathode lead frame;The cathode lead frame is connected with the first negative terminal by penetrating out of the shell away from the cathode area side;The bottom of the cathode area is connected with cathode lead-out piece;The other end of the cathode lead-out piece is connected with the second negative terminal by penetrating out of the bottom of the shell.

[0006] Further, the first negative terminal and the second negative terminal are separated from each other.

[0007] Further, the bottom of the shell is provided with a cathode lead-out hole, and the cathode lead-out piece is sealed through the cathode lead-out hole.

[0008] Further, the second negative electrode terminal comprises a base and an extension; the inner side of the base is attached to the bottom surface of the shell and connected with the cathode lead-out piece; the outer peripheral edge of the base extends along the bottom surface of the shell to form the extension.

[0009] Further, the second negative electrode terminal further comprises a bent part, wherein the bent part is formed by bending the base along the bottom surface of the shell to the side wall of the shell; the inner side of the bent part is attached to the side wall of the shell, and the outer side of the bent part is exposed outward.

[0010] Further, the positive electrode terminal, the first negative electrode terminal and the second negative electrode terminal are formed by electroplating or sheet metal embedding.

[0011] Further, the core is composed of a plurality of single pole pieces stacked.

[0012] The super-thin MLPC multi-terminal conductive polymer laminated capacitor has the advantages and positive effects that: the MLPC multi-terminal conductive polymer laminated capacitor with the thickness of less than 1.0 mm can be mass-produced without the design of the lead frame bending structure process, the miniaturization design of the product is realized, on the other hand, the structure design of the multi-terminal effectively reduces the ESR value, improves the parallel effect, expands the application field of the miniaturization of the product, and meets the needs in the industry. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a top view of the utility model.

[0014] Figure 2 is a sectional view of the utility model.

[0015] Explanation of reference numerals: 1, shell; 2, core; 3, positive electrode terminal; 4, first negative electrode terminal; 5, second negative electrode terminal; 6, anode lead frame; 7, cathode lead frame; 8, cathode lead-out piece; 101, accommodating cavity; 102, cathode lead-out hole; 201, anode region; 202, cathode region; 501, base; 502, extension; 503, bent part. DETAILED DESCRIPTION

[0016] Further, the embodiments of the present application will be described in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application or its application or uses. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0017] In the description of the present application, it should be understood that the terms "two sides", "up and down", "left and right", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, the term "comprising" and any variation thereof means "at least including".

[0018] In the description of the present application, it should be understood that the terms "first", "second", etc. represent the distinguishing effect, and do not indicate the order.

[0019] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "form", "connect", "connect" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally formed; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] Further, the embodiments of the present application will be described in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application or its application or uses. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] As Figure 1 ,Figure 2 As shown in the drawings, the ultra-thin MLPC multi-terminal conductive polymer laminated capacitor comprises a shell 1, a core 2, and the shell 1 is provided with a positive terminal 3 and a first negative terminal 4 at two opposite ends thereof for electrode lead-out.

[0022] The shell 1 is internally provided with a containing cavity 101, and the core 2 is arranged in the containing cavity 101.

[0023] The core 2 is composed of an anode area 201 and a cathode area 202, the anode area 201 is connected with an anode lead frame 6, the anode lead frame 6 is connected with the positive terminal 3 after penetrating out of the shell 1 away from the anode area 201, the cathode area 202 is connected with a cathode lead frame 7, and the cathode lead frame 7 is connected with the first negative terminal 4 after penetrating out of the shell 1 away from the cathode area 202.

[0024] The cathode area 202 is connected with a cathode lead-out piece 8 at the bottom thereof, and the cathode lead-out piece 8 is connected with the second negative terminal 5 after penetrating out of the bottom of the shell 1.

[0025] Specifically, the shell 1 can adopt an insulating material as the packaging material, and in the embodiment, the shell 1 adopts epoxy resin as the material. In the embodiment, the containing cavity 101 is rectangular, and the size thereof is matched with the packaged core 2. The shell 1 seals and covers the core 2, plays the role of insulation and air blocking to prevent external water from entering, and improves the stability of the capacitor. In other embodiments, the internal gap can be filled with inert gas to improve the stability. In the embodiment, the shell 1 is composed of a bottom shell and a cover plate, wherein the bottom shell is provided with the containing cavity 101, and the bottom shell and the cover plate are sealingly combined to form the shell 1. The manufacturing process is to first place the core 2 in the containing cavity 101 of the bottom shell, and then seal the core 2 in the shell 1 by using the cover plate. In another embodiment, the shell 1 can be integrally injection molded, and the manufacturing process is to first place the core 2 in a mold, and then inject molten plastic to form the shell 1 covering the core 2.

[0026] The core 2 is formed by stacking a plurality of sheet-shaped single pole pieces, wherein each single pole piece is composed of an aluminum foil, an oxidation film layer, a conductive polymer layer, a carbon layer, a silver paste layer, and an isolation glue, the aluminum foil is separated by the isolation glue to form an anode end and a cathode end, and the cathode end of each single pole piece is formed with the oxidation film layer, the conductive polymer layer, the carbon layer, and the silver paste layer from inside to outside. A plurality of single pole pieces are stacked in sequence, the cathode ends of adjacent single pole pieces are coated with silver paste to form a parallel relationship, the anode ends of adjacent single pole pieces are welded to form a parallel relationship, the stacked anode ends form the anode area 201, and the stacked cathode ends form the cathode area 202. The number of stacked layers of the core 2 is determined according to actual application, and is not limited herein.

[0027] AsFigure 1 、 Figure 2 As shown in FIG. 1, the outer shell 1 is provided with a positive terminal 3 and a first negative terminal 4 at opposite ends thereof for electrode lead-out. The positive terminal 3, the first negative terminal 4 and the second negative terminal 5 are formed by electroplating or sheet metal embedding.

[0028] Specifically, the positive terminal 3 is arranged at one end of the outer shell 2 as a positive lead-out, and the first negative terminal 4 is arranged at the other end of the outer shell 2 as a negative lead-out. In this embodiment, the positive terminal 3, the first negative terminal 4 and the second negative terminal 5 are formed by electroplating. The electroplating material can be copper, gold, silver, nickel or other metal materials with strong conductivity. In this embodiment, the positive terminal 3 and the first negative terminal 4 are arranged as conductive structures covering the ends of the outer shell 1. In this embodiment, the positive terminal 3 and the first negative terminal 4 are rectangular structures matching the ends of the outer shell 1. More specifically, the front, left and right sides and top and bottom of the designated area of the end of the outer shell 1 are respectively formed with an electroplating layer, thereby improving the adhesion of the plating layer, increasing the conductive area, reducing the heating rate, strengthening the adhesion of the later welding and improving the shock resistance. In other embodiments, the shape of the positive terminal 3 and the first negative terminal 4 is not limited.

[0029] By forming the positive terminal 3, the first negative terminal 4 and the second negative terminal 5 by electroplating, the shape of the plating layer can be designed arbitrarily according to actual application, and the thickness of the plating layer can be set arbitrarily according to requirements without being constrained by the size of the capacitor product. For example, the positive and negative terminals can be formed by electroplating to prepare an MLPC multi-terminal conductive polymer laminated capacitor with a total thickness of less than 1.0 mm. Even smaller capacitors can be prepared, breaking through the traditional size limit. The traditional structure and technology cannot make an MLPC multi-terminal conductive polymer laminated capacitor with a total thickness of less than 1.0 mm, and the traditional lead frame bending structure and processing method has technical obstacles. Electroplating the positive and negative terminals eliminates the lead frame bending process, and smaller MLPC multi-terminal conductive polymer laminated capacitors can be prepared to meet the application requirements of thin and light product design in the industry. In another embodiment, the positive terminal 3, the first negative terminal 4 and the second negative terminal 5 can also be formed by metal sheet embedding, which can also eliminate the lead frame bending process and achieve thin and miniaturization.

[0030] The second negative terminal 5 is arranged on the bottom of the shell 1 and is used for leading out the electrode. The bottom of the shell 1 is provided with a cathode leading-out hole 102, and the cathode leading-out piece 8 is sealed through the cathode leading-out hole 102. The bottom of the cathode area 202 of the core 2 is connected with the cathode leading-out piece 8, and the other end of the cathode leading-out piece 8 penetrates through the bottom of the shell 1 and is connected with the second negative terminal 5. The cathode leading-out piece 8 is used for connecting the cathode area 202 of the core 2 with the second negative terminal 5 to form an electrical connection as a second negative lead-out. The first negative terminal 4 and the second negative terminal 5 are separated from each other. The two-way negative output forms a shunt effect, and meanwhile improves the parallel effect of the single pole piece. Meanwhile, the second negative terminal 5 is arranged on the bottom of the shell 1 and directly connected with the cathode area 202 of the core 2 to form an output circuit, thereby reducing the ESR and inductance.

[0031] The second negative terminal 5 comprises a base 501 and an extension 502. The inner side of the base 501 is attached to the bottom surface of the shell 1 and connected with the cathode leading-out piece 8. The outer periphery of the base 501 extends along the bottom surface of the shell 1 to form the extension 502.

[0032] Specifically, in the embodiment, the second negative terminal 5 is formed by electroplating. In other embodiments, the second negative terminal 5 can also be formed by embedding a conductive metal plate. The second negative terminal 5 formed by electroplating or embedding is thin, the inner side of the base 501 is connected with the cathode leading-out piece 8, the second negative terminal 5 is in conduction with the core 2 to form an electrical connection, the lead-out distance of the negative electrode is shortened, and the electrical output efficiency is improved. The base 501 and the extension 502 are integrated, the extension 502 increases the area of the negative electrode, improves the electrical transmission efficiency, and improves the heat dissipation efficiency. The negative electrode increases the welding area and improves the anti-shock effect.

[0033] The second negative terminal 5 further comprises a bending part 503. The bending part 503 is formed by bending the base 501 along the bottom surface of the shell 1 to the side surface of the shell 1. The inner side of the bending part 503 is attached to the side wall of the shell 1, and the outer side of the bending part 503 is exposed outward.

[0034] Specifically, the second negative terminal 5 can also be provided with the bending part 503. The bending part 503 is integrated with the base 501 and the extension 502, further expands the exposed area of the negative electrode, is located on the side wall of the shell 1, strengthens the adhesion of the second negative terminal 5 to the shell 1, strengthens the strength of the side wall of the shell 1, forms a welding point on the side wall of the shell 1, and improves the anti-shock effect.

[0035] The thickness of the positive and negative electrode terminals formed by plating can be set to any size according to actual needs, is not limited by the thickness of the terminals, and the thickness of the capacitor can be made thinner, breaking through the limitation of the bending size of the positive and negative terminals of the traditional capacitor. The electrode terminal design of any thickness can be realized, the thickness of the electrode terminal can be reduced, the single electrode sheet of the capacitor can be increased to improve the static capacity, and the effect of light and thin high capacity design is achieved.

[0036] The negative electrode of the whole capacitor is output by the first negative electrode terminal 4 and the second negative electrode terminal 5, the parallel benefit of the capacitor is increased, the equivalent series resistance and ESR of the laminated capacitor are reduced, and the size limitation of the traditional capacitor is broken through, so that the height of the capacitor can be reduced to below 1.0 mm, the thin design of the capacitor is realized, and the traditional bending electrode terminal is replaced.

[0037] It should be emphasized that the embodiments of the utility model are illustrative rather than limiting, and therefore the utility model is not limited to the embodiments described in the specific embodiments, and any other embodiments derived by those skilled in the art according to the technical scheme of the utility model also belong to the protection scope of the utility model.

Claims

1. An ultra-thin MLPC multi-terminal conducting polymer laminated capacitor comprising a housing (1), a core (2), characterized in that: The shell (1) is provided with a positive terminal (3) and a first negative terminal (4) at opposite ends thereof for electrode lead-out. The shell (1) is internally provided with a containing cavity (101), and the containing cavity (101) is provided with a core (2). The core (2) is composed of an anode area (201) and a cathode area (202), the anode area (201) is connected with an anode lead frame (6), the anode lead frame (6) is connected with the positive terminal (3) at a side thereof away from the anode area (201), the cathode area (202) is connected with a cathode lead frame (7), and the cathode lead frame (7) is connected with the first negative terminal (4) at a side thereof away from the cathode area (202). The cathode area (202) is connected with a cathode lead-out piece (8) at a bottom thereof, and the cathode lead-out piece (8) is connected with the second negative terminal (5) at another end thereof.

2. The ultra-thin MLPC multi-terminal conducting polymer stack capacitor according to claim 1, wherein: The first negative terminal (4) and the second negative terminal (5) are separated from each other.

3. The ultra-thin MLPC multi-terminal conducting polymer stack capacitor according to claim 1, wherein: The shell (1) is provided with a cathode lead-out hole (102) at a bottom thereof, and the cathode lead-out piece (8) is sealedly penetrated into the cathode lead-out hole (102).

4. The ultra-thin MLPC multi-terminal conducting polymer stack capacitor of claim 1, wherein: The second negative terminal (5) comprises a base (501) and an extension (502), an inner side surface of the base (501) is attached to a bottom surface of the shell (1) and connected with the cathode lead-out piece (8), and an outer peripheral edge of the base (501) extends along the bottom surface of the shell (1) to form the extension (502).

5. The ultra-thin MLPC multi-terminal conducting polymer stack capacitor according to claim 4, wherein: The second negative terminal (5) further comprises a bending portion (503), the bending portion (503) is formed by bending the base (501) along the bottom surface of the shell (1) to the side surface of the shell (1), an inner side surface of the bending portion (503) is attached to a side wall of the shell (1), and an outer side surface of the bending portion (503) is exposed outward.

6. The ultra-thin MLPC multi-terminal conducting polymer stack capacitor of claim 1, wherein: The positive terminal (3), the first negative terminal (4) and the second negative terminal (5) are formed by electroplating or sheet metal embedding.

7. The ultra-thin MLPC multi-terminal conducting polymer stack capacitor of claim 1, wherein: The core (2) is composed of a plurality of single pole pieces stacked together.

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