CN212570745U - Patch type explosion-proof electrolytic capacitor - Google Patents

Abstract

The utility model discloses an explosion-proof electrolytic capacitor of SMD, explosion-proof electrolytic capacitor of SMD includes the shell, the core, bottom plate and layer of breathing in, the outside protrusion of lateral wall of shell forms vertical recess, and inside the opening of vertical recess towards the shell, the core sets up inside the shell, the bottom plate is connected in the bottom of shell, and the electric connection core, the bottom plate includes first conductive pattern and second conductive pattern, first conductive pattern and second conductive pattern are located the both sides of bottom plate, and the positive electrode and the negative electrode of electric connection core respectively, the layer of breathing in sets up in vertical recess, for adsorbed gas. Therefore, the gas generated in the patch type explosion-proof electrolytic capacitor can be absorbed, and the patch type explosion-proof electrolytic capacitor is prevented from being damaged or exploded.

Description

Patch type explosion-proof electrolytic capacitor

Technical Field

The utility model relates to a SMD condenser especially relates to an explosion-proof electrolytic capacitor of SMD.

Background

The chip electrolytic capacitor has been widely used in consumer appliances, computer motherboard and its periphery, power supply, communication articles and basic components such as automobile, and is one of the indispensable components in electronic products, and its main functions include: charge storage, ac filtering, bypassing, coupling, decoupling, phase inversion, tuning, etc.

In order to meet the environmental protection standard, when the chip type electrolytic capacitor is arranged on a circuit board, the selected lead material needs longer welding time and higher welding temperature, so that the gas quantity generated inside the chip type electrolytic capacitor is increased, the pressure is increased, the sealed shell is broken, the chip type electrolytic capacitor is damaged, and even the chip type electrolytic capacitor can explode. Moreover, the housing of the chip type electrolytic capacitor is a sealed structure, so that the heat dissipation capability is extremely poor, and the gas generated in the chip type electrolytic capacitor can be further promoted to be thermally expanded, so that the possibility of the adverse effects is increased.

Therefore, the main object of the present invention is to provide a patch type explosion-proof electrolytic capacitor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof electrolytic capacitor of SMD can absorb the gas of the inside production of explosion-proof electrolytic capacitor of SMD, avoids explosion-proof electrolytic capacitor of SMD to damage or explode.

To achieve at least one or other of the advantages, an embodiment of the present invention provides a patch type explosion-proof electrolytic capacitor, which includes a housing, a core, a bottom plate, and a suction layer.

The side wall of the shell protrudes outwards to form at least one longitudinal groove, and the opening of the longitudinal groove faces the interior of the shell. The shell has the functions of protecting the core and isolating the core from the outside.

The core is arranged inside the shell.

The bottom plate is connected to the bottom of the shell and electrically connected with the core, the bottom plate comprises a first conductive pattern and a second conductive pattern, and the first conductive pattern and the second conductive pattern are located on two sides of the bottom plate and are respectively electrically connected with a positive electrode and a negative electrode of the core.

The air suction layer is arranged in the longitudinal groove and used for adsorbing air.

In some embodiments, the at least one longitudinal groove is two longitudinal grooves located on opposite sides of the housing.

In some embodiments, the at least one longitudinal groove is three longitudinal grooves symmetrically arranged around the housing centered on the central axis of the housing.

In some embodiments, the housing is made of aluminum metal.

In some embodiments, the getter layer is an activated carbon layer.

In some embodiments, the getter layer is composed of zeolite.

In some embodiments, the getter layer is made of diatomaceous earth.

In some embodiments, the thickness of the longitudinal grooves is greater than the thickness of the getter layer.

In some embodiments, the getter layer fills the longitudinal grooves.

In some embodiments, the length of the longitudinal groove is less than or equal to two-thirds of the height of the housing.

Therefore, utilize the utility model provides a SMD explosion-proof electrolytic capacitor borrows by the layer of breathing in and absorbs the gas of SMD explosion-proof electrolytic capacitor inside production, avoids SMD explosion-proof electrolytic capacitor to damage or explode. In addition, because the longitudinal groove is formed by the outward protrusion of the side wall of the shell, the air suction layer cannot occupy the space of the core inside the shell, and the capacitance of the patch type explosion-proof electrolytic capacitor is effectively ensured.

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 schematic perspective view of a chip type explosion-proof electrolytic capacitor according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic perspective view of a second embodiment of a patch type explosion-proof electrolytic capacitor according to the present invention;

FIG. 4 is a schematic cross-sectional view of FIG. 3; and

fig. 5 is a schematic perspective view of a patch type explosion-proof electrolytic capacitor according to a third embodiment of the present invention.

The attached drawings are marked as follows: 10, 10' -patch type explosion-proof electrolytic capacitor; 12-a housing; 122-longitudinal grooves; 14-a base plate; 142-a first conductive pattern; 144-a second conductive pattern; 16-a core; 18-a getter layer; w1 — thickness of longitudinal grooves; w2-thickness of getter layer; h1 — length of longitudinal groove; h2 — height of housing.

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, fig. 1 is a perspective view of a chip type explosion-proof electrolytic capacitor 10 according to a first embodiment of the present invention. To achieve at least one of the advantages or other advantages, a first embodiment of the present invention provides a patch type explosion-proof electrolytic capacitor 10. As shown in fig. 1, the patch type explosion-proof electrolytic capacitor 10 includes a case 12 and a bottom plate 14.

Referring to fig. 2 in conjunction with fig. 1, fig. 2 is a schematic cross-sectional view of fig. 1. The side wall of the housing 12 projects outwardly to form a longitudinal groove 122, and the longitudinal groove 122 opens into the interior of the housing 12. A base plate 14 is attached to the lower end of the housing 12.

As shown in fig. 2, the patch type explosion-proof electrolytic capacitor 10 further includes a core 16 and a suction layer 18. Further seen, the backplane 14 includes a first conductive pattern 142 and a second conductive pattern 144.

The wick 16 is disposed inside the housing 12, and the housing 12 has functions of protecting the wick 16 and isolating the wick 16 from the outside. The getter layer 18 is disposed within the longitudinal groove 122 for gettering gases generated within the housing 12. The first conductive pattern 142 and the second conductive pattern 144 are located on both sides of the base plate 14 and electrically connect the positive electrode and the negative electrode of the core 16, respectively, so that the base plate 14 is electrically connected to the core 16 to conduct current.

When gas is generated inside the case 12 due to reflow (reflow), high welding temperature, long welding time, etc., the gas is absorbed by the getter layer 18 to prevent the chip type explosion-proof electrolytic capacitor 10 from being damaged or exploded. In addition, because the longitudinal grooves 122 are formed by the side wall of the housing 12 protruding outwards, the air suction layer 18 does not occupy the space of the core 16 inside the housing 12, and the preset capacitance of the chip type explosion-proof electrolytic capacitor 10 is effectively ensured.

In the present embodiment, the thickness W1 of the longitudinal groove 122 is greater than the thickness W2 of the getter layer 18 to accommodate the getter layer 18. The length H1 of the longitudinal groove 122 is less than two-thirds of the height H2 of the housing 12 to avoid affecting the retention effect of the insulating filler on the wick 16 at the lower end of the interior of the housing 12. However, the thickness W2 of the air-breathing layer 18 may be larger than the thickness W1 of the longitudinal grooves 122, so as to increase the air-breathing amount of the air-breathing layer 18 and prevent the chip type explosion-proof electrolytic capacitor 10 from being damaged or exploded. The length H1 of the longitudinal groove 122 may also be greater than or equal to two-thirds of the height H2 of the housing 12, adding space to accommodate a larger volume of the getter layer 18.

To explain further, in the present embodiment, the getter layer 18 is an activated carbon layer. However, the air-breathing layer 18 may be made of a material capable of absorbing gas, such as zeolite, diatomite, or a mechanical structure having air-breathing effect.

Referring to fig. 3 and 4, fig. 3 is a perspective view of a patch type explosion-proof electrolytic capacitor 10' according to a second embodiment of the present invention, and fig. 4 is a cross-sectional view of fig. 3. To achieve at least one of the advantages or other advantages, a second embodiment of the present invention further provides a patch type explosion-proof electrolytic capacitor 10'. The difference between the chip type explosion-proof electrolytic capacitor 10 of the first embodiment is that the side wall of the housing 12 protrudes outward to form two longitudinal grooves 122, the two longitudinal grooves 122 are located on two opposite sides of the housing 12, and the air suction layer 18 is disposed inside each longitudinal groove 122.

Referring to fig. 5, fig. 5 is a schematic top view of a patch type explosion-proof electrolytic capacitor 10 ″ according to a third embodiment of the present invention. To achieve at least one of the advantages or other advantages, a third embodiment of the present invention further provides a patch type explosion-proof electrolytic capacitor 10 ". The difference between the patch type explosion-proof electrolytic capacitor 10 and the first embodiment is that the side wall of the housing 12 protrudes outward to form three longitudinal grooves 122, and the three longitudinal grooves 122 are symmetrically arranged around the housing 12 with the central axis of the housing 12 as the center. However, the number of the longitudinal grooves 122 may be set according to practical requirements, for example, four or more longitudinal grooves 122 may be provided to accommodate the air-breathing layer 18 in order to enhance the air-breathing amount of the air-breathing layer 18.

Further, the housing 12 may be made of aluminum, stainless steel, or the like. Furthermore, in one embodiment, the getter layer 18 may fill the longitudinal grooves 122.

To sum up, the utility model provides an explosion-proof electrolytic capacitor 10 of SMD borrows by the layer 18 of breathing in and absorbs the gas of the inside production of explosion-proof electrolytic capacitor 10 of SMD, can avoid explosion or damage of explosion-proof electrolytic capacitor 10 of SMD. In addition, because the longitudinal grooves 122 are formed by the side wall of the housing 12 protruding outwards, the air suction layer 18 does not occupy the space of the core 16 inside the housing 12, and the capacitance of the chip explosion-proof electrolytic capacitor 10 is effectively ensured. And the whole structure is simple, and the production cost is low.

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 (10)

1. The utility model provides a paster type explosion-proof electrolytic capacitor which characterized in that, paster type explosion-proof electrolytic capacitor includes:

the side wall of the shell protrudes outwards to form at least one longitudinal groove, and the opening of the longitudinal groove faces the interior of the shell;

a core disposed inside the housing;

the base plate is connected to one end of the shell and electrically connected with the core, and comprises a first conductive pattern and a second conductive pattern, wherein the first conductive pattern and the second conductive pattern are positioned on two sides of the base plate and are respectively and electrically connected with a positive electrode and a negative electrode of the core; and

and the air suction layer is arranged in the longitudinal groove.

2. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the at least one longitudinal groove is two longitudinal grooves, the two longitudinal grooves being located on opposite sides of the housing.

3. The patch type explosion-proof electrolytic capacitor of claim 1, wherein the at least one longitudinal groove is three longitudinal grooves symmetrically arranged around the housing centered on the central axis of the housing.

4. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the case is made of aluminum metal.

5. The patch type explosion-proof electrolytic capacitor of claim 1, wherein the getter layer is an activated carbon layer.

6. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the getter layer is formed of zeolite.

7. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the air-breathing layer is made of diatomite.

8. The patch type explosion-proof electrolytic capacitor of claim 1, wherein the thickness of the longitudinal groove is greater than the thickness of the getter layer.

9. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the getter layer fills the longitudinal grooves.

10. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the length of the longitudinal groove is less than or equal to two-thirds of the height of the housing.

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