Soldering lug type electrolytic capacitor

Abstract

The utility model discloses a soldering lug type electrolytic capacitor which comprises a capacitor body, a liquid spraying prevention gasket and a sleeve wrapping the liquid spraying prevention gasket and the capacitor body. Wherein the anti-liquid-spraying gasket is arranged at one end, provided with the anti-explosion valve, of the capacitor body, and a gap is formed between the anti-liquid-spraying gasket and the anti-explosion valve of the capacitor body; the sleeve wraps the periphery of the liquid spraying prevention gasket through the curled edge so as to fix the liquid spraying prevention gasket on the capacitor body. The soldering lug type electrolytic capacitor provided by the utility model has good explosion-proof and flame-retardant effects, can prevent fire disasters caused by explosion of the capacitor core bag, and improves the safety performance of the electrolytic capacitor.

Description

Technical Field

[0001] This utility model belongs to the field of electronic device technology, and in particular relates to a solder-type electrolytic capacitor. Background Technology

[0002] Among various capacitors, aluminum electrolytic capacitors are widely popular because, for the same size, they can achieve a larger CV value per unit area, store more charge, and are cheaper.

[0003] Aluminum electrolytic capacitors are generally equipped with explosion-proof structures, such as explosion-proof valves or explosion-proof holes. Typically, most explosion-proof devices for aluminum electrolytic capacitors are located on the aluminum shell, such as explosion-proof holes or explosion-proof valves designed on the bottom or side. The main purpose is to prevent the capacitor from exploding if a performance abnormality occurs during use, causing the capacitor to heat up and the electrolyte inside the capacitor to vaporize, producing a large amount of gas inside the shell. When the gas pressure exceeds the pressure release value of the explosion-proof valve, the explosion-proof valve opens, releasing the electrolyte and gas, thus preventing the capacitor from exploding.

[0004] Although most aluminum electrolytic capacitors are designed with explosion-proof structures, capacitor explosions can still occur. Because the electrolyte in aluminum electrolytic capacitors is primarily composed of ethylene glycol and polymer materials, which are flammable, and this electrolyte adheres to the electrolytic paper, which is also flammable, the capacitor core can easily ignite under the sparks during an explosion. Once a capacitor catches fire, it can damage the entire device using the capacitor, or even cause a serious fire, endangering the user's property and life. Therefore, explosion-proof design for aluminum electrolytic capacitors is extremely important.

[0005] The above background information is provided only to aid in understanding the inventive concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] The purpose of this invention is to provide a solder-type electrolytic capacitor to solve at least one of the problems mentioned above in the background section.

[0007] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:

[0008] A solder-type electrolytic capacitor includes a capacitor body, a blowout preventer, and a sleeve covering the blowout preventer and the capacitor body; wherein, the blowout preventer is disposed on the end of the capacitor body where an explosion-proof valve is located, and a gap is provided between the blowout preventer and the explosion-proof valve of the capacitor body; the sleeve is rolled over to cover the periphery of the blowout preventer to fix the blowout preventer to the capacitor body.

[0009] In some embodiments, the anti-spray gasket includes a gasket body and a tensioning ring disposed around the periphery of the gasket body.

[0010] In some embodiments, the gasket body is circular and includes an edge portion that engages with a tensioning ring and a domed, arched body portion.

[0011] In some embodiments, the tensioning ring is ultrasonically fused to the gasket body.

[0012] In some embodiments, the gasket body is formed by pressing flame-retardant nonwoven fabric with physically adsorbed particulate matter.

[0013] In some embodiments, the side of the gasket body near the capacitor body is configured as a plane, the size of which is adapted to the bottom surface of the capacitor body.

[0014] In some embodiments, the edge of the gasket body is annular, and its size is the same as that of the tensioning ring.

[0015] In some embodiments, the height of the gap between the anti-spray gasket and the explosion-proof valve of the capacitor body is equal to the thickness of the tensioning ring.

[0016] In some embodiments, the surface size of the blowout preventer is equal to the size of the bottom surface of the core package, or the surface size of the blowout preventer is larger than the size of the bottom surface of the core package.

[0017] In some embodiments, the capacitor body includes an aluminum shell, a core package installed inside the aluminum shell, and a cover plate for encapsulating the core package inside the aluminum shell; the core package includes a plurality of electrolytic paper layers, an aluminum foil layer, and lead-out electrodes disposed on the aluminum foil layer; the cover plate is provided with solder pad terminals, and the lead-out electrodes are connected to the solder pad terminals.

[0018] The beneficial effects of this utility model's technical solution are:

[0019] Compared with existing technologies, the present invention's soldered electrolytic capacitor has excellent explosion-proof and flame-retardant effects, which can prevent fires caused by the explosion of the capacitor core and improve the safety performance of the electrolytic capacitor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional schematic diagram of a solder-type electrolytic capacitor according to an embodiment of the present invention;

[0022] Figure 2 This is a partially enlarged schematic diagram of a solder-type electrolytic capacitor according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of a strip-type electrolytic capacitor according to an embodiment of the present invention after being cut open;

[0024] Figure 4 This is a partially enlarged view of a cutaway electrolytic capacitor according to an embodiment of the present invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of an anti-spray gasket for a solder-type electrolytic capacitor according to an embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional schematic diagram of the anti-spray gasket of a solder-type electrolytic capacitor according to an embodiment of the present invention;

[0027] Figure 7 This is a partially exploded schematic diagram of a solder-type electrolytic capacitor according to an embodiment of the present invention;

[0028] Figure 8 This is an exploded view of a solder-type electrolytic capacitor according to an embodiment of the present invention;

[0029] Figure 9 This is an exploded view of another embodiment of the solder-type electrolytic capacitor of the present invention. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer and more understandable, and to enable those skilled in the art to better understand the solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, "multiple" means two or more. Terms such as "installed," "connected," "joined," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Reference Figures 1-7 As shown in the figure, as an embodiment of the present invention, a solder-type electrolytic capacitor 100 is provided, including a capacitor body 10, a blowout preventer 11, and a sleeve 12 covering the blowout preventer 11 and the capacitor body 10; wherein, the blowout preventer 11 is disposed on one end of the capacitor body where an explosion-proof valve 1010 is provided, and a gap is provided between the blowout preventer 11 and the explosion-proof valve 1010 of the capacitor body; the sleeve 12 covers the periphery of the blowout preventer 11 by rolling the edge to fix the blowout preventer 11 to the capacitor body 10.

[0035] Reference Figure 3 , Figure 8 , Figure 9As shown, the capacitor body 10 includes an aluminum shell 101, a core package 20 installed inside the aluminum shell 101, and a cover plate 30 for encapsulating the core package 20 inside the aluminum shell 101; wherein, an explosion-proof valve 1010 is provided at the bottom of the aluminum shell 101; the core package 20 includes a plurality of electrolytic paper layers, an aluminum foil layer, and lead-out electrodes disposed on the aluminum foil layer; the cover plate 30 is provided with solder pad terminals 301, and the lead-out electrodes are connected to the solder pad terminals 301. In some embodiments, the solder pad terminals 301 are horn-shaped solder pad terminals.

[0036] Reference Figure 3 As shown, in some embodiments, the inner diameter of the sleeve 12 is adapted to the outer diameter of the capacitor body 10, such that the side of the capacitor body 10 is in complete contact with the inner wall of the sleeve 12. In some embodiments, the length of the sleeve 12 is greater than the length of the capacitor body 10.

[0037] Refer to Figures 4-6 As shown, in some embodiments, the anti-spray gasket 11 includes a gasket body 110 and a tensioning ring 111 disposed around the periphery of the gasket body 110; wherein, the gasket body 110 is circular, and includes an edge portion 1101 that mates with the tensioning ring 111 and a domed main body portion 1102. In some embodiments, the tensioning ring 111 is ultrasonically fused to the gasket body 110 to tension the gasket body and prevent the gasket body 110 from being sprayed open by impact. In some embodiments, the gasket body 110 is formed by molding flame-retardant non-woven fabric and physically adsorbent particulate matter, wherein the physically adsorbent particulate matter can be honeycomb cement fragments or various types of foamed flame-retardant particles.

[0038] Reference Figure 6 As shown, in some embodiments, the side of the gasket body 110 near the capacitor body 10 is formed as a plane, the size of which is adapted to the bottom surface of the capacitor body 10. In some embodiments, the edge of the gasket body 110 is annular, the size of which is the same as the size of the tension ring 111. In some embodiments, the height of the gap between the blowout preventer gasket 11 and the explosion-proof valve 1010 of the capacitor body 10 is equal to the thickness of the tension ring 111.

[0039] In some embodiments, the material of the blowout preventer 11 is one or a combination of foamed cement, foamed metal sponge, foamed polymer sponge, and multi-layer genuine leather. In some embodiments, the surface size of the blowout preventer 11 is equal to the size of the bottom surface of the core package 20, or the surface size of the blowout preventer 11 is larger than the size of the bottom surface of the core package but smaller than or equal to the size of the bottom surface of the capacitor body, thereby ensuring that the blowout preventer completely covers the explosion-proof valve 1010 at the bottom of the capacitor body. (Refer to...) Figure 2As shown, in some embodiments, the domed main body 1102 of the anti-spray gasket protrudes beyond the plane of the periphery of the sleeve 12.

[0040] Reference Figure 3 , Figure 4 , Figure 9 As shown, in some embodiments, the explosion-proof valve 1010 at the bottom of the capacitor body is aligned with the center of the blowout preventer 11 and is on the same axis as the center of the core package 20.

[0041] Reference Figure 2 , Figure 7 , Figure 8 , Figure 9 As shown, in some embodiments, the cover plate 30 is provided with solder pad terminals 301, and the lead-out electrodes led out from the core package 20 are electrically connected to the solder pad terminals 301. The core package 20 is placed inside the aluminum shell 101, and the opening of the aluminum shell 101 is sealed by the cover plate, which is then waisted and the opening of the aluminum shell is rolled to fix the cover plate.

[0042] In some embodiments, the cover plate 30 is circular, and the diameter of the spray shield 11 is less than or equal to the diameter of the cover plate 30. In some embodiments, the thickness of the spray shield 11 is less than the thickness of the cover plate 30.

[0043] In some embodiments, the core package 20 includes a first electrolytic paper layer, an anode aluminum foil layer, a second electrolytic paper layer, and a cathode aluminum foil layer arranged sequentially from the inside out; a positive electrode is riveted to the anode aluminum foil layer, and a negative electrode is riveted to the cathode aluminum foil layer; wherein, a sandwich paper film is provided at the position where the positive electrode is riveted to the anode aluminum foil layer and / or at the position where the negative electrode is riveted to the cathode aluminum foil layer; the first electrolytic paper layer, the anode aluminum foil layer with the riveted positive electrode, the second electrolytic paper layer, and the cathode aluminum foil layer with the riveted negative electrode are wound together to form the core package. In some embodiments, the core package 20 has a through hole along its central axis. In some embodiments, the positive electrode lead-out structure is the same as the negative electrode lead-out structure. In some embodiments, the positive electrode and the negative electrode have different electrode structures, the thickness of the negative electrode is 100 μM-200 μM, and the thickness of the negative electrode aluminum foil layer is 20 μM-60 μM.

[0044] In some embodiments, the thickness of the electrolytic paper layer is 40µm-70µm, and the electrolytic paper is a double-layer composite paper with a rotary screen or a double-layer composite paper with a rotary screen and a special screen. In some embodiments, the fiber structure of the electrolytic paper is circular.

[0045] It is understood that the above description is a further detailed explanation of the present invention in conjunction with specific / preferred embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the inventive concept, and all such substitutions or modifications should be considered within the scope of protection of this patent. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention.

[0046] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of different embodiments or examples, without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the scope defined by the appended claims.

[0047] Furthermore, the scope of this invention is not intended to be limited to the specific embodiments of the processes, machines, manufactures, material compositions, means, methods, and steps described in the specification. Those skilled in the art will readily understand that existing or later-developed disclosures, processes, machines, manufactures, material compositions, means, methods, or steps that perform substantially the same function as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein can be utilized. Therefore, the appended claims are intended to include such processes, machines, manufactures, material compositions, means, methods, or steps within their scope.

Claims

1. A tab-type electrolytic capacitor, characterized by: The capacitor body, the anti-spray liquid gasket, and the sleeve covering the anti-spray liquid gasket and the capacitor body; wherein the anti-spray liquid gasket is arranged on the capacitor body at one end provided with an explosion-proof valve, and a gap is arranged between the anti-spray liquid gasket and the explosion-proof valve of the capacitor body; the sleeve covers the periphery of the anti-spray liquid gasket by edge curling to fix the anti-spray liquid gasket on the capacitor body.

2. The wire wrap electrolytic capacitor of claim 1 wherein: The anti-spray liquid gasket comprises a gasket body and a tension ring arranged on the periphery of the gasket body.

3. The snap-terminating electrolytic capacitor of claim 2, wherein: The gasket body is circular, and comprises an edge portion matched with the tension ring and a main body portion arched in a dome shape.

4. The snap-terminating electrolytic capacitor of claim 2, wherein: The tension ring is ultrasonically welded to the gasket body.

5. The solder-type electrolytic capacitor as described in claim 2, characterized in that: The gasket body is made of flame-retardant non-woven fabric and physically adsorbed particulate matter.

6. The soldered electrolytic capacitor of claim 2, wherein: One side of the gasket body close to the capacitor body is arranged as a plane, and the size of the plane is adapted to the bottom surface of the capacitor body.

7. The soldered electrolytic capacitor of claim 2, wherein: The edge portion of the gasket body is annular, and the size thereof is consistent with that of the tension ring.

8. The snap-on electrolytic capacitor of claim 2, wherein: The height of the gap between the anti-spray liquid gasket and the explosion-proof valve of the capacitor body is equal to the thickness of the tension ring.

9. The soldered electrolytic capacitor of claim 1, wherein: The size of the surface of the anti-spray liquid gasket is equal to or greater than that of the bottom surface of the core package.

10. The wire wrap electrolytic capacitor of any one of claims 1-9, wherein: The capacitor body comprises an aluminum shell, a core package mounted in the aluminum shell, and a cover plate for packaging the core package in the aluminum shell; the core package comprises a plurality of electrolytic paper layers, an aluminum foil layer, and an outgoing electrode arranged on the aluminum foil layer; the cover plate is provided with a solder terminal, and the outgoing electrode is connected to the solder terminal.

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