Novel common-anode laminated polymer solid-state capacitor

Abstract

The utility model discloses a novel common anode laminated polymer solid-state capacitor, which comprises a first packaging shell, a second packaging shell, an electrode structure and a composite capacitor layer, and is characterized in that the electrode structure and the composite capacitor layer are arranged in a cavity formed by the first packaging shell and the second packaging shell; the electrode structure extends out of the second packaging shell to form a leading-out part; the electrode structure comprises a first electrode and a second electrode, the anode end of the composite capacitor layer is embedded in the first electrode, the cathode end of the composite capacitor layer is embedded in the second electrode, and the first electrode is of an integrated frame common anode structure. The novel common-anode laminated polymer solid-state capacitor disclosed by the utility model is simple in assembly steps, can improve the efficiency and reduce the production cost, and can solve the problem that the equivalent series resistance value is too high due to multiple welding.

Description

Technical Field

[0001] The utility model relates to the technical field of laminated capacitors, and particularly relates to a novel common anode laminated polymer solid capacitor. Background Art

[0002] A laminated solid capacitor is formed by connecting in parallel one or more capacitor electrodes deposited with conductive polymer, carbon paste and silver paste, and then encapsulating the parallel structure with resin to form a square solid laminated capacitor. The laminated capacitor can achieve a larger capacitance within the same volume, thus meeting the requirements of electronic devices for miniaturization and light weight. The preparation of traditional laminated solid capacitors is to uniformly apply conductive silver glue on the front and back of a traditional frame, and place the capacitor core blanks piece by piece. The anodes are connected in parallel by welding, and the cathodes are bonded by conductive glue, and pressure is applied to make them tightly combined to form a stable parallel laminated structure. This structure has poor impact resistance. Since multiple capacitor units are repeatedly welded and riveted on the same anode terminal, it will cause certain damage to the anode terminal, and the capacitor units may also be washed away during the encapsulation process when pressure is applied.

[0003] For example, Chinese invention patent CN 113990664B discloses a manufacturing method of a laminated chip solid aluminum electrolytic capacitor. The manufacturing method of the laminated solid aluminum electrolytic capacitor includes the following steps: (1) cutting the aluminum foil; (2) coating the cut aluminum foil with barrier glue to divide the cathode area and the anode area; (3) forming a conductive polymer cathode layer on the cathode area by chemical polymerization process; (4) forming a conductive graphite layer on the outer surface of the conductive polymer cathode layer; (5) impregnating silver paste on the outer surface of the conductive graphite layer, drying after pressure reduction treatment to form a conductive silver layer, and making a single-chip capacitor element, wherein the air flow direction of the pressure reduction treatment is from the anode area to the cathode area; (6) welding the anode area of the single-chip capacitor element to the anode part of the lead frame, and bonding the cathode area of the capacitor element to the cathode part of the lead frame with conductive silver paste, and curing to form a capacitor core; (7) performing encapsulation with a mold to form a solid capacitor. In this invention patent, the single-chip capacitor elements need to be welded to the anode part of the lead frame respectively. On the one hand, the structural stability of the single-chip capacitor elements is not strong, and they are easy to fall off during encapsulation. At the same time, multiple weldings easily lead to too much welding slag on the anode part, too large welding current on the anode part, increasing the equivalent series resistance value. On the other hand, each capacitor element is repeatedly welded on the same terminal, affecting the production efficiency and increasing the production cost of the capacitor. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide a novel common anode laminated polymer solid capacitor.

[0005] The utility model adopts the following technical scheme:

[0006] A novel common anode laminated polymer solid capacitor, which comprises: a first encapsulation shell, a second encapsulation shell, an electrode structure and a composite capacitor layer. The electrode structure and the composite capacitor layer are disposed inside a cavity formed by the first encapsulation shell and the second encapsulation shell, and a lead-out portion extends out of the second encapsulation shell from the electrode structure; the electrode structure includes a first electrode and a second electrode. The positive electrode end of the composite capacitor layer is embedded inside the first electrode, and the negative electrode end of the composite capacitor layer is embedded inside the second electrode. The first electrode is an integral frame common anode structure.

[0007] Further, the first electrode and the second electrode are arranged vertically from top to bottom. The first electrode is an anode electrode, and the second electrode is a cathode electrode.

[0008] Further, the first electrode includes a first common anode region and a second common anode region, and the first common anode region and the second common anode region are connected through a common anode connection region.

[0009] Further, the first common anode region is correspondingly arranged opposite to the front surface of the upper half of the composite capacitor layer, the second common anode region is correspondingly arranged opposite to the back surface of the upper half of the composite capacitor layer, and the common anode connection region is disposed on one side of the composite capacitor layer and connects the first common anode region and the second common anode region.

[0010] Further, the second electrode includes a first cathode and a second cathode, and the first cathode and the second cathode are connected through a cathode connection piece.

[0011] Further, the first cathode is in a sheet structure and is correspondingly arranged opposite to the front surface of the lower half of the composite capacitor layer, the second cathode is in a sheet structure and is correspondingly arranged opposite to the back surface of the lower half of the composite capacitor layer, and the cathode connection piece is disposed at the bottom of the composite capacitor layer and is connected to the first cathode and the second cathode on both sides respectively.

[0012] Further, the lead-out portion includes a common anode pin and a cathode pin. The lower end of the second electrode leads out the cathode pin to the outside of the second encapsulation shell, and the upper end of the first electrode leads out the common anode pin to the outside of the second encapsulation shell.

[0013] Further, the top end of the first common anode region leads out the common anode pin to the second encapsulation shell. After the common anode pin penetrates through the second encapsulation shell, it bends towards the inside of the capacitor to form an inverted L shape.

[0014] Further, the bottom end of the first cathode leads out the cathode pin to the second encapsulation shell. After the cathode pin penetrates through the second encapsulation shell, it bends towards the inside of the capacitor to form an inverted L shape.

[0015] Further, the composite capacitor layer includes a plurality of capacitor layers, which are bonded through a bonding layer.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] The novel common anode laminated polymer solid capacitor provided by the present utility model, by arranging the first electrode and the second electrode, embeds the positive electrode end and the negative electrode end of the composite capacitor layer into the first electrode and the second electrode respectively, making the internal structure of the capacitor more stable. Among them, the first electrode is an integrated frame common anode structure, and only the front and back sides of the composite capacitor layer need to be welded to the first common anode area and the second common anode area of the first electrode. Compared with the traditional method of individually welding each capacitor layer unit of the laminated capacitor to the anode structure, the assembly method has simpler steps, can improve efficiency and reduce production costs, and at the same time can solve the problem of high equivalent series resistance value caused by multiple weldings. Description of the Drawings

[0018] Figure 1 is an exploded schematic view of the novel common anode laminated polymer solid capacitor provided by the present utility model;

[0019] Figure 2 is a structural schematic view of the composite capacitor layer of the novel common anode laminated polymer solid capacitor provided by the present utility model;

[0020] Figure 3 is a structural schematic of the electrode structure of the novel common anode laminated polymer solid capacitor provided by the present utility model Figure 1 ;

[0021] Figure 4 is a structural schematic of the electrode structure of the novel common anode laminated polymer solid capacitor provided by the present utility model Figure 2 ;

[0022] Figure 5 is a structural schematic of the first electrode of the novel common anode laminated polymer solid capacitor provided by the present utility model;

[0023] The markings in the figures are explained as follows:

[0024] The first encapsulation shell 1, the second encapsulation shell 2, the electrode structure 3, the composite capacitor layer 4, the first electrode 31, the second electrode 32, the capacitor layer 41, the bonding layer 42, the first common anode area 311, the second common anode area 312, the common anode connection area 313, the common anode pin 314, the first cathode 321, the second cathode 322, the cathode connection piece 323, the cathode pin 324. Detailed Embodiments

[0025] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] In addition, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] As described in the background art, in each traditional stacked solid-state capacitor, each capacitor element needs to be welded to the anode pin, resulting in an unstable structure and high assembly cost.

[0029] To solve this technical problem, the present utility model provides a novel common anode stacked polymer solid-state capacitor, which is provided with a common anode frame structure.

[0030] Specifically, please refer to Figures 1-5 , a novel common anode stacked polymer solid-state capacitor, which includes: a first encapsulation shell 1, a second encapsulation shell 2, an electrode structure 3, and a composite capacitor layer 4. The electrode structure 3 and the composite capacitor layer 4 are placed inside the cavity formed by the first encapsulation shell 1 and the second encapsulation shell 2, and the electrode structure 3 extends an extraction part to the outside of the second encapsulation shell 2; the electrode structure 3 includes a first electrode 31 and a second electrode 32. The positive electrode end of the composite capacitor layer 4 is embedded inside the first electrode 31, and the negative electrode end of the composite capacitor layer 4 is embedded inside the second electrode 32. The first electrode 31 is an integral frame common anode structure.

[0031] The novel common anode laminated polymer solid capacitor provided by the utility model embeds the upper and lower ends of the composite capacitor layer 4 into the first electrode 31 and the second electrode 32 respectively, enhancing the stability and vibration resistance of the capacitor structure, reducing the risk of the composite capacitor layer 4 falling off during pressure packaging. The first electrode 31 is an anode electrode, and the front and back sides of the upper end of the composite capacitor layer 4 can be welded inside the first electrode, reducing the number of welds between the capacitor layer and the anode electrode, preventing damage to the anode electrode structure caused by excessive welding times, and at the same time reducing the equivalent series resistance value by reducing the number of welding times.

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings.

[0033] It should be noted that, without conflict, the embodiments in the utility model and the features and technical solutions in the embodiments can be combined with each other.

[0034] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] Please refer to Figures 1-5 , this embodiment provides a novel common anode laminated polymer solid capacitor, which includes a first encapsulation shell 1, a second encapsulation shell 2, an electrode structure 3 and a composite capacitor layer 4. The composite capacitor layer 4 is embedded inside the electrode structure 3 to form a conductive medium. The conductive medium is placed inside the cavity formed by the first encapsulation shell 1 and the second encapsulation shell 2, and the electrode structure extends outward from the second encapsulation shell 2 to form a lead-out portion. During use, the lead-out portion is welded to an external circuit board to achieve electrical connection between the capacitor and the external circuit board.

[0036] Furthermore, the composite capacitor layer 4 includes a plurality of capacitor layers 41. The capacitor layers 41 are electrically connected by bonding through a bonding layer 42. During preparation, the number of layers of the capacitor layers 41 is determined according to the capacity and model of the capacitor. Further, the bonding layer 42 is a welding layer or a conductive adhesive, and the capacitor layer 41 is composed of a conductive polymer, carbon paste and silver paste.

[0037] Further, the electrode structure 3 includes a first electrode 31 and a second electrode 32. The first electrode 31 and the second electrode 32 are arranged in sequence from top to bottom in the vertical direction. Among them, the first electrode 31 is an anode electrode, and the second electrode 32 is a cathode electrode. The lead-out part includes a common anode pin 314 and a cathode pin 324. Specifically, the upper end of the composite capacitor layer 4 is embedded inside the first electrode 31, and the upper end of the first electrode 31 leads out the common anode pin 314 to the outside of the second package 2. The lower end of the composite capacitor layer 4 is embedded inside the second electrode 32, and the lower end of the second electrode 32 leads out the cathode pin 324 to the outside of the second package 2.

[0038] Further, the first electrode 31 is an integrated frame common anode structure, which includes a first common anode region 311 and a second common anode region 312, and the first common anode region 311 and the second common anode region 312 are connected by a common anode connection region 313. Specifically, the first common anode region 311 is correspondingly arranged opposite to the front of the anode region of the composite capacitor layer 4, and the second common anode region 312 is correspondingly arranged opposite to the back of the anode region of the composite capacitor layer 4. The common anode connection region 313 is placed on one side of the composite capacitor layer 4 and connects the first common anode region 311 and the second common anode region 312. At this time, the anode region of the composite capacitor layer 4 is embedded inside the first electrode 31, and multiple capacitor layers 41 share one anode structure. During preparation, the front of the composite capacitor layer 4 is welded and fixed or pasted with conductive glue on the first common anode region 311, and the back of the composite capacitor layer 4 is welded and fixed or pasted with conductive glue on the second common anode region 312. The first electrode 31 wraps the composite capacitor layer 4, enhancing the stability and shock resistance of the internal structure of the capacitor and preventing the composite capacitor layer 4 from falling off during packaging.

[0039] Further, the top of the first common anode region 311 leads out the common anode pin 314 to the second package 2. After the common anode pin 314 penetrates through the second package 2, it bends inward to form an inverted L shape. During use, the pin is welded to an external circuit board. By setting the integrated frame common anode structure, the welding times of the anode terminals are reduced, effectively preventing the increase in the equivalent series resistance value caused by excessive welding slag. The common anode pin 314 directly leads out from the first common anode region 311 and extends to the second package 2, and the assembly steps are simple, which can effectively improve production efficiency.

[0040] Further, the second electrode 32 includes a first cathode 321 and a second cathode 322. The first cathode 321 and the second cathode 322 are connected by a cathode connecting piece 323. Specifically, the cathode connecting piece 323 and the first cathode 321 are integrally formed, and the cathode connecting piece 323 is the tab of the first cathode 321. After the cathode connecting piece 323 is bent from the bottom of the first cathode 321 to the side, its end is snap-fitted to the bottom of the second cathode 322. The first cathode 321 is in a sheet structure and is correspondingly arranged opposite to the front of the cathode region of the composite capacitor layer 4. The second cathode 322 is in a sheet structure and is correspondingly arranged opposite to the back of the cathode region of the composite capacitor layer 4. The cathode connecting piece 323 is placed at the bottom of the composite capacitor layer 4 and is connected to the first cathode 321 and the second cathode 322 on both sides respectively. The composite capacitor layer 4 is fixed in the first electrode 31 and the second electrode 32 respectively by welding or conductive adhesive pasting, further preventing the composite capacitor layer 4 from falling off and making the overall structure more firm.

[0041] Further, the bottom end of the first cathode 321 sheet leads out a cathode pin 324 to the second encapsulation shell 2. After the cathode pin 324 penetrates through the second encapsulation shell 2, it is bent towards the inside of the capacitor to form an inverted L shape. During use, the pin is welded to an external circuit board.

[0042] The preparation steps of the novel common anode laminated polymer solid capacitor provided by the present utility model are as follows: The sheet frame of the first electrode 31 is bent twice by 90 degrees to form a side U-shaped integrated frame common anode structure. The first cathode 321 and the cathode connecting piece 323 are integrally formed. After the cathode connecting piece 323 is bent, its end is snapped into the bottom of the second cathode 322 to complete the connection between the first cathode 321 and the second cathode 322. The specific number of layers of the capacitor layer 41 is determined according to the capacitance or model of the capacitor. A plurality of capacitor layers 41 are bonded and fixed layer by layer through a bonding layer 42 to form a composite capacitor layer 4. The anode region of the composite capacitor layer 4 is embedded inside the first electrode 31, and the front and back of the anode region of the composite capacitor layer 4 are respectively welded and fixed or conductive adhesive pasted and fixed to the first common anode region 311 and the second common anode region 312 of the first electrode 31. The cathode region of the composite capacitor layer 4 is embedded inside the second electrode 32, and the front and back of the cathode region of the composite capacitor layer 4 are respectively welded and fixed or conductive adhesive pasted and fixed to the first cathode 321 and the second cathode 322 of the second electrode 32. The conductive medium composed of the electrode structure 3 and the composite capacitor layer 4 is encapsulated in the first encapsulation shell 1 and the second encapsulation shell 2. The common anode pin 314 and the cathode pin 324 of the electrode structure 3 penetrate through the second encapsulation shell 2 and are bent towards the inside of the capacitor to form an inverted L shape, completing the assembly of the capacitor.

[0043] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. The accompanying drawings show the preferred embodiments of the present utility model, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent substitution on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields shall be within the scope of the patent protection of the present utility model by the same token.

Claims

1. A novel common anode laminated polymer solid capacitor, characterized in that, It includes: A first encapsulation shell (1), a second encapsulation shell (2), an electrode structure (3), and a composite capacitor layer (4). The electrode structure (3) and the composite capacitor layer (4) are placed inside the cavity formed by the first encapsulation shell (1) and the second encapsulation shell (2), and a lead-out portion extends from the electrode structure (3) to the outside of the second encapsulation shell (2). The electrode structure (3) includes a first electrode (31) and a second electrode (32). The positive terminal of the composite capacitor layer (4) is embedded inside the first electrode (31), and the negative terminal of the composite capacitor layer (4) is embedded inside the second electrode (32). The first electrode (31) is an integrated frame common anode structure.

2. The novel common anode laminated polymer solid capacitor according to claim 1, wherein The first electrode (31) and the second electrode (32) are arranged vertically from top to bottom. The first electrode (31) is an anode electrode, and the second electrode (32) is a cathode electrode.

3. The novel common anode laminated polymer solid capacitor according to claim 2, characterized in that, The first electrode (31) includes a first common anode region (311) and a second common anode region (312), and the first common anode region (311) and the second common anode region (312) are connected through a common anode connection region (313).

4. The novel common anode laminated polymer solid capacitor according to claim 3, wherein The first common anode region (311) is correspondingly arranged opposite to the front side of the upper half of the composite capacitor layer (4), and the second common anode region (312) is correspondingly arranged opposite to the back side of the upper half of the composite capacitor layer (4). The common anode connection region (313) is placed on one side of the composite capacitor layer (4) and connects the first common anode region (311) and the second common anode region (312).

5. The novel common anode laminated polymer solid capacitor according to claim 2, wherein The second electrode (32) includes a first cathode (321) and a second cathode (322), and the first cathode (321) and the second cathode (322) are connected through a cathode connection piece (323).

6. The novel common anode laminated polymer solid capacitor according to claim 5, characterized in that, The first cathode (321) is in a sheet structure and is correspondingly arranged opposite to the front side of the lower half of the composite capacitor layer (4). The second cathode (322) is in a sheet structure and is correspondingly arranged opposite to the back side of the lower half of the composite capacitor layer (4). The cathode connection piece (323) is placed at the bottom of the composite capacitor layer (4) and is connected to the first cathode (321) and the second cathode (322) on both sides respectively.

7. The novel common anode laminated polymer solid capacitor according to claim 3 or 5, characterized in that, The lead-out portion includes a common anode pin (314) and a cathode pin (324). The lower end of the second electrode (32) leads out the cathode pin (324) to the outside of the second encapsulation shell (2), and the upper end of the first electrode (31) leads out the common anode pin (314) to the outside of the second encapsulation shell (2).

8. The novel common anode laminated polymer solid capacitor according to claim 4, wherein, The top end of the first common anode region (311) leads out the common anode pin (314) to the second encapsulation shell (2). After passing through the second encapsulation shell (2), the common anode pin (314) bends towards the inside of the capacitor to form an inverted L shape.

9. The novel common anode laminated polymer solid capacitor according to claim 5, characterized in that, The bottom end of the first cathode (321) leads out the cathode pin (324) to the second encapsulation shell (2). After passing through the second encapsulation shell (2), the cathode pin (324) bends towards the inside of the capacitor to form an inverted L shape.

10. The novel common anode laminated polymer solid capacitor according to claim 1, wherein The composite capacitor layer (4) includes a plurality of capacitor layers (41), and the capacitor layers (41) are bonded through a bonding layer (42).

Images