CN212230277U

CN212230277U - Explosion-proof patch type electrolytic capacitor

Info

Publication number: CN212230277U
Application number: CN202021395568.5U
Authority: CN
Inventors: 杜嘉杰; 魏蓉晖
Original assignee: Dong Jia Electronics Chenzhou Co ltd
Current assignee: Dong Jia Electronics Chenzhou Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-12-25
Anticipated expiration: 2030-07-15

Abstract

The utility model discloses a SMD electrolytic capacitor of explosion-proof, this SMD electrolytic capacitor of explosion-proof includes: shell, core, layer and the bottom plate seat of breathing in. One end of the explosion-proof patch type electrolytic capacitor shell is a closed end, and the other end of the explosion-proof patch type electrolytic capacitor shell is an open end. The core is arranged in the shell, and a sealing plug is arranged between the core and the shell. The air suction layer is arranged on the inner side of the closed end of the shell, and a certain distance is reserved between the air suction layer and the core. The base plate seat is connected with the opening end of the shell, so that the shell and the core arranged in the shell are fixedly arranged on the base plate seat. Therefore, the air suction layer in the explosion-proof patch type electrolytic capacitor can prevent the problems of explosion and the like caused by gas generated in the patch type electrolytic capacitor, and the arrangement is also beneficial to the installation of the patch type electrolytic capacitor.

Description

Explosion-proof patch type electrolytic capacitor

Technical Field

The utility model relates to an electrolytic capacitor field especially relates to an utilize in SMD electrolytic capacitor's explosion-proof structure.

Background

Electrolytic capacitors are generally classified into aluminum electrolytic capacitors and tantalum electrolytic capacitors based on differences in their positive electrodes, in which a metal foil (aluminum/tantalum) is used as a positive electrode and an insulating oxide layer (aluminum oxide/tantalum pentoxide) of the metal foil is used as a dielectric. The chip type electrolytic capacitor has the characteristics of large capacitance per unit volume, large rated capacity, low price (such as low manufacturing cost) and the like, and is widely used.

When the voltage in the capacitor is abnormal, the electrolyte (such as ethylene glycol) is decomposed to generate hydrogen. Meanwhile, the capacitor is heated in a large amount, causing a sharp increase in internal pressure, thereby causing explosion (or so-called slurry explosion).

On the other hand, in order to meet the environmental protection standard, the lead material selected on the capacitor circuit board requires longer welding time and welding temperature, which results in increased gas amount generated inside the aluminum electrolytic capacitor and easy damage to the capacitor, such as slurry explosion. In addition, it is necessary to prevent the gas generated inside the aluminum electrolytic capacitor from being discharged to the outside to adversely affect the environment.

Therefore, how to arrange an explosion-proof structure or adopt what explosion-proof method is one of the problems to be actively solved by those skilled in the art in the field of electrolytic capacitor technology, especially in the manufacture of chip type electrolytic capacitors.

Therefore, the main object of the present invention is to provide an explosion-proof surface-mounted electrolytic capacitor, so as to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a SMD electrolytic capacitor of explosion-proof formula can prevent the explosion that the inside gas that produces of SMD electrolytic capacitor causes.

For achieving at least one of the advantages or other advantages, an embodiment of the present invention provides an explosion-proof patch type electrolytic capacitor, including: shell, core, layer and the bottom plate seat of breathing in. One end of the explosion-proof patch type electrolytic capacitor shell is a closed end, and the other end of the explosion-proof patch type electrolytic capacitor shell is an open end. The core is arranged in the shell, and a sealing plug is arranged between the core and the shell. The air suction layer is arranged on the inner side of the closed end of the shell, and a certain distance is reserved between the air suction layer and the core. The base plate seat is connected with the opening end of the shell, so that the shell and the core arranged in the shell are fixedly arranged on the base plate seat.

In some embodiments, the getter layer is disk-shaped and the core is cylindrical, the diameter of the getter layer being greater than the diameter of the core.

In some embodiments, the getter layer is annular and the core is cylindrical, the getter layer having an outer diameter greater than the diameter of the core.

In some embodiments, the getter layer is made of a getter material. The gas generated in the explosion-proof patch type electrolytic capacitor is absorbed through the getter materials so as to prevent the capacitor from exploding or exploding slurry.

In some embodiments, a getter is disposed in the getter layer. Preferably, the getter is one of activated carbon (active coarse), silica gel (silica gel), alumina gel, activated clay or zeolite (zeolite). In practice, the getter is not limited to this kind according to the requirements of the usage scenario of the chip type electrolytic capacitor.

In some embodiments, the getter layer is a coated arrangement. The getter layer is applied to the inside of said closed end of the housing. The air suction layer extends from the inner side surface of the closed end to cover the inner side wall of the shell.

In some embodiments, the coated getter layer extends from the inside surface of the closed end over less than 5mm of the inside wall of the housing.

In some embodiments, two sides of the bottom of the substrate seat are respectively provided with a metal contact pad, and the metal contact pads are electrically connected with the core and used for connecting a circuit board to package the explosion-proof surface-mounted electrolytic capacitor or connect the explosion-proof surface-mounted electrolytic capacitor with other electronic components.

Therefore, utilize the utility model provides a SMD electrolytic capacitor of explosion-proof can prevent the explosion that the inside gas that produces of SMD electrolytic capacitor causes, still is favorable to SMD electrolytic capacitor's installation.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are listed, and the detailed description is given below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It should be apparent that the drawings in the following description are only examples of the present application and are not intended to limit the embodiments of the present invention, and that other drawings can be derived from the drawings by those of ordinary skill in the art without inventive exercise. The drawings comprise:

FIG. 1 is a perspective view of a middle explosion-proof surface-mounted electrolytic capacitor according to the present invention; and

fig. 2 is a front perspective view of the explosion-proof patch type electrolytic capacitor of the present invention.

The attached drawings are marked as follows: 10-explosion-proof patch type electrolytic capacitor 12-shell 121-closed end 122-open end 14-core 16-air suction layer 18-bottom plate seat 181-metal contact pad

Detailed Description

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or component being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In addition, the term "comprises" and any variations thereof mean "including at least".

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integrally formed connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Referring to fig. 1 and 2, fig. 1 is a perspective view of an explosion-proof chip type electrolytic capacitor 10; fig. 2 is a front perspective view of the explosion-proof patch type electrolytic capacitor 10. To achieve at least one of the advantages or other advantages, an embodiment of the present invention provides an explosion-proof patch type electrolytic capacitor 10, where the explosion-proof patch type electrolytic capacitor 10 includes: a shell 12, a core 14, a getter layer 16, and a baseplate seat 18. One end of the housing 12 of the explosion-proof patch type electrolytic capacitor 10 is a closed end 121, and the other end is an open end 122. The cartridge 14 is disposed within the housing 12 proximate the open end 122 side of the housing 12. In one embodiment, a sealing plug (not shown) is disposed between the core 14 and the housing 12 to secure the core 14. The getter layer 16 is arranged inside said closed end 121 of the casing 12, at the end of the closed end 121 remote from the core 14. A certain distance is left between the getter layer 16 and the core 14. At the same time, there is a certain distance between the core 14 and the inner side wall of the housing 12. The base plate 18 is connected to the open end 122 of the housing 12 such that the housing 12 and the core 14 contained therein are fixedly secured to the base plate 18.

In one embodiment, two sides of the bottom plate 18 are respectively provided with a metal contact pad 181, and the two metal contact pads 181 are symmetrically disposed on the bottom of the bottom plate 18. The metal contact pads 181 are electrically connected to the core 14 for connecting to a circuit board to package the explosion-proof surface-mount electrolytic capacitor 10 or attach to other electronic components.

In one embodiment, the getter layer 16 has the shape of a disc and the core 14 has a cylindrical shape, the diameter of the getter layer 16 being greater than the diameter of the core 14, as shown in figure 2. A certain distance is left between the air-breathing layer 16 and the core 14 to prevent the air-breathing layer 16 from being extruded to the core 14 by air-breathing deformation. Meanwhile, a certain distance is reserved between the core 14 and the inner side wall of the shell 12 to avoid direct collision by external force. The gas generated by the core 14 in the explosion-proof patch type electrolytic capacitor 10 during the operation process can be absorbed and removed by the air suction layer 16, thereby ensuring the safe operation of the core 14 and the explosion-proof patch type electrolytic capacitor 10.

In one embodiment, the air intake layer 16 is annular and the core 14 is cylindrical, the air intake layer 16 having an outer diameter greater than the diameter of the core 14. A certain distance is left between the air-breathing layer 16 and the core 14 to prevent the air-breathing layer 16 from being extruded to the core 14 by air-breathing deformation. The gas generated by the core 14 in the explosion-proof patch type electrolytic capacitor 10 during the operation process can be absorbed and removed by the air suction layer 16, thereby ensuring the safe operation of the core 14 and the explosion-proof patch type electrolytic capacitor 10.

In an embodiment, the getter layer 16 may be made of a getter material. The getter materials absorb the gas generated in the explosion-proof patch type electrolytic capacitor 10 to prevent the capacitor from explosion or slurry explosion, thereby ensuring the safe operation of the core 14 and the explosion-proof patch type electrolytic capacitor 10.

In an embodiment, a getter may be disposed in the gettering layer 16. Preferably, the getter is one of activated carbon (active coarse), silica gel (silica gel), alumina gel, activated clay or zeolite (zeolite). In practice, the getter is not limited to this kind according to the requirements of the usage scenario of the chip type electrolytic capacitor. The getter adsorbs and removes the gas generated in the operation process of the core 14, thereby ensuring the safe operation of the core 14 and the explosion-proof patch type electrolytic capacitor 10.

In one embodiment, the getter layer 16 may be a coating-type arrangement. A getter layer 16 is applied to the inside of said closed end 121 of the casing 12. Further, the air suction layer 16 extends from the inner side surface of the closed end 121 to cover the inner side wall of the housing 12, so as to improve air suction efficiency. Therefore, the air suction layer 16 can timely and quickly adsorb the gas generated by the core 14 in the operation process, and further the safe operation of the core 14 and the explosion-proof patch type electrolytic capacitor 10 is ensured.

Further, in one embodiment, the coated getter layer 16 extends from the inner surface of the closed end 121 to cover the inner sidewall of the housing 12 by less than 5mm, so as to avoid the getter layer 16 from affecting the installation space of the core 14.

When the explosion-proof chip type electrolytic capacitor 10 is assembled, the housing 12 is first turned upside down to make the open end 122 face upward, the air-breathing layer 16 is disposed on the inner side of the closed end 121 of the housing 12, a sealing plug is sleeved, the core 14 is fixedly disposed in the housing 12 and close to the open end 122, and the housing 12 and the core 14 are fixedly mounted on the bottom plate seat 18. The core 14 is electrically connected to the metal contact pads 181 disposed on both sides of the bottom of the base plate 18, and the metal contact pads 181 are connected to a circuit board, thereby realizing the packaging of the explosion-proof surface-mount electrolytic capacitor 10 or the attachment of other electronic components.

In conclusion, utilize the utility model provides a SMD electrolytic capacitor of explosion-proof absorbs the gas that produces in this SMD electrolytic capacitor of explosion-proof through the layer of breathing in that sets up at its shell, and then prevents the explosion that the inside gas that produces of SMD electrolytic capacitor causes, and this kind of setting is favorable to SMD electrolytic capacitor's installation simultaneously still.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make many modifications or equivalent variations by using the above disclosed method and technical contents without departing from the technical scope of the present invention, but all the simple modifications, equivalent variations and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. An explosion-proof patch type electrolytic capacitor, characterized in that, the explosion-proof patch type electrolytic capacitor includes:

the device comprises a shell, a handle and a handle, wherein one end of the shell is a closed end, and the other end of the shell is an open end;

the core is arranged in the shell;

the air suction layer is arranged on the inner side of the closed end, and a certain distance is reserved between the air suction layer and the core; and

the bottom plate seat is connected with the opening end of the shell.

2. An explosion-proof patch type electrolytic capacitor as defined in claim 1 wherein said air-breathing layer is disc-shaped, said air-breathing layer having a diameter greater than a diameter of said core.

3. An explosion-proof patch type electrolytic capacitor as defined in claim 1 wherein said air-breathing layer is annular and has an outer diameter greater than the diameter of said core.

4. An explosion-proof patch-type electrolytic capacitor as defined in claim 1 wherein the getter layer is made of a getter material.

5. An explosion-proof patch type electrolytic capacitor as claimed in claim 1, wherein a getter is provided in the getter layer.

6. The explosion-proof patch type electrolytic capacitor of claim 5 wherein the getter is one of activated carbon, silica gel, alumina gel, activated clay or zeolite.

7. An explosion-proof patch type electrolytic capacitor as defined in claim 1 wherein the getter layer is coated on the inside of the closed end.

8. The explosion proof patch type electrolytic capacitor of claim 7 wherein the getter layer extends from the inside surface of the closed end to cover the inside walls of the case.

9. An explosion-proof, patch-type electrolytic capacitor as defined in claim 8 in which the getter layer extends from the inside surface of the closed end over less than 5mm of the inside wall of the housing.

10. The explosion-proof patch type electrolytic capacitor of claim 1 wherein a metal contact pad is disposed on each of two sides of the bottom of the base plate, and the metal contact pads are electrically connected to the core for connecting to a circuit board.