CN212570744U

CN212570744U - Patch type explosion-proof electrolytic capacitor

Info

Publication number: CN212570744U
Application number: CN202021421635.6U
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: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-02-19
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses an explosion-proof electrolytic capacitor of SMD, explosion-proof electrolytic capacitor of SMD includes the shell, the elasticity rete, the core, bottom plate and layer of breathing in, vertical trompil has been seted up on the shell, the elasticity rete covers vertical trompil, and attach in the lateral wall outside of shell, the core sets up inside the shell, the bottom plate is connected in shell bottom and 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 internal surface of elasticity rete is coated on the layer of breathing in, and set up in vertical trompil. 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 electrolytic capacitor 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, an elastic film layer, a core, a bottom plate, and an air suction layer.

The housing has at least one longitudinal opening.

The elastic film layer covers the longitudinal opening and is attached to the outer side of the side wall of the shell.

The core is arranged inside the shell.

The bottom plate is connected to the bottom end 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 coated on the inner surface of the elastic film layer and is arranged in the longitudinal hole for absorbing air.

In some embodiments, the at least one longitudinal opening is two longitudinal openings arranged on opposite sides of the housing.

In some embodiments, the at least one longitudinal opening is three longitudinal openings 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 thickness of the elastic film layer is between 30um-100 um.

In some embodiments, the elastic film layer is made of a thermoplastic elastomer.

In some embodiments, the length of the longitudinal opening is less than two-thirds of the height of the housing.

In some embodiments, a plurality of supporting members are disposed in the longitudinal opening for supporting the elastic film.

Therefore, utilize the utility model provides an explosion-proof electrolytic capacitor of SMD borrows by the layer of breathing in and absorbs the gas of the inside production of explosion-proof electrolytic capacitor of SMD, and the elasticity rete outwards expands in order to hold gas, can avoid explosion-proof electrolytic capacitor of SMD to damage or explode. In addition, by observing the outward expansion degree of the elastic film layer, the working state of the patch type explosion-proof electrolytic capacitor can be judged, and corresponding measures are taken.

In addition, the air suction layer is arranged in the longitudinal opening and coated on the inner surface of the elastic film layer, so that the air suction layer cannot occupy the space of the core in the shell, and the preset capacitance of the chip explosion-proof electrolytic capacitor is effectively ensured. And the patch type explosion-proof electrolytic capacitor has simple integral structure and low production cost.

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 the surface mount type explosion-proof electrolytic capacitor of the present invention;

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

FIG. 2A is a schematic view of a portion of FIG. 2 at A;

FIG. 3 is a schematic perspective view showing the expansion of the elastic film layer of the surface mount type explosion-proof electrolytic capacitor of the present invention;

FIG. 4 is a schematic structural view of an embodiment of the supporting member of the present invention disposed in the longitudinal opening; and

fig. 5 is a schematic structural view of another embodiment of the supporting member of the present invention disposed in the longitudinal hole.

The attached drawings are marked as follows: 10-patch type explosion-proof electrolytic capacitor; 12-a housing; 122 is longitudinally perforated; 124 outside the sidewall; 14-an elastic film layer; 16-a base plate; 162 a first conductive pattern; 164 a second conductive pattern; 18-a core; 20-a getter layer; 22-a support; h1-length of longitudinal opening; 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 the present invention. To achieve at least one of the advantages or other advantages, an 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, an elastic film layer 14, and a bottom plate 16.

A longitudinal opening 122 (shown in phantom in fig. 1) is formed in a side wall of the housing 12. The elastic film layer 14 covers the longitudinal opening 122 and is affixed to the sidewall outer side 124 of the housing 12. A base plate 16 is attached to the lower end of the housing 12.

Referring to fig. 2 and fig. 2A in combination with fig. 1, fig. 2 is a schematic cross-sectional view of fig. 1, and fig. 2A is a partial schematic view of a portion a in fig. 2. As shown, the patch type explosion-proof electrolytic capacitor 10 further includes a core 18 and a suction layer 20. Further seen, the backplane 16 includes a first conductive pattern 162 and a second conductive pattern 164.

The core 18 is disposed inside the housing 12, and the housing 12 has functions of protecting the core 18 and isolating the core 18 from the outside. The getter layer 20 is disposed on the inner surface of the elastic film 14 and disposed in the longitudinal opening 122 for absorbing the gas generated inside the housing 12. The first conductive pattern 162 and the second conductive pattern 164 are located on both sides of the base plate 16 and electrically connect the positive electrode and the negative electrode of the core 18, respectively, so that the base plate 16 is electrically connected to the core 18 to conduct current. In one embodiment, the getter layer 20 may be formed on the inner surface of the elastic film 14 by coating, bonding, or the like. The first conductive pattern 162 and the second conductive pattern 164 are formed on the surface of the base plate 16 by electroplating, or fixed on the surface of the base plate 16 by welding, bonding, or the like.

The length H1 of the longitudinal opening 122 is less than two-thirds of the height H2 of the housing 12 to avoid affecting the retention of the insulating filler on the wick 18 at the lower end of the interior of the housing 12. However, the length H1 of the longitudinal opening 122 may be greater than or equal to two-thirds of the height H2 of the housing 12, so as to increase the space for accommodating the larger area of the elastic film 14.

In the present embodiment, the getter layer 20 is an activated carbon layer. The elastic film layer 14 is made of a thermoplastic elastomer. However, the present invention is not limited thereto, and the gas-adsorbing layer 20 may be made of a gas-adsorbing material such as zeolite or diatomaceous earth. The elastic film 14 may also be made of rubber, non-thermoplastic elastomer, or other material with certain elasticity and better toughness.

It should be noted that, in an embodiment, two longitudinal openings 122 are formed on the side wall of the housing 12, and are arranged on two opposite sides of the housing 12, and each longitudinal opening 122 is covered by the elastic film 14. Alternatively, three longitudinal openings 122 are formed in the side wall of the housing 12, and are symmetrically arranged around the housing 12 with the central axis of the housing 12 as the center, and each longitudinal opening 122 is covered by the elastic film 14. In other words, the number of the longitudinal holes 122 can be set according to practical requirements, for example, in order to enhance the suction capacity of the suction layer 20, a plurality of longitudinal holes 122 can be set to arrange a plurality of elastic film layers 14, and the inner surface of each elastic film layer 14 is provided with the suction layer 20.

Further, the housing 12 may be made of aluminum, stainless steel, or the like. The longitudinal opening 122 is configured to better conform to the characteristics of the patch type explosion-proof electrolytic capacitor 10 than the transverse opening or other types of openings.

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 20 to prevent the chip type explosion-proof electrolytic capacitor 10 from being damaged or exploded. In addition, since the air suction layer 20 absorbs the gas to expand, or the gas is accumulated around the air suction layer 20 to press the elastic film 14, the elastic film 14 expands outward to contain the gas, and by observing the degree of outward expansion of the elastic film 14, the working state of the patch type explosion-proof electrolytic capacitor 10 can be determined, and corresponding measures can be taken.

For example, as shown in fig. 3, when the elastic film layer 14 is observed to expand outward to a nearly limit degree, it is determined that the patch type explosion-proof electrolytic capacitor 10 is in a state close to damage or explosion, and the patch type explosion-proof electrolytic capacitor 10 should be immediately stopped for replacement.

Referring to fig. 4, fig. 4 is a schematic structural view of an embodiment of the supporting element 22 of the present invention disposed in the longitudinal opening 122. As shown in FIG. 4, in one embodiment, a plurality of cross-connected supporting members 22 are disposed in the longitudinal opening 122, and the supporting members 22 are disposed on the inner surface of the getter layer 20, such that the getter layer 20 and the supporting members 22 are disposed in the longitudinal opening 122. The supporting member 22 is used to support the elastic film 14, so as to prevent the elastic film 14 from being recessed inward due to external force, which affects the operation of the patch type explosion-proof electrolytic capacitor 10. In one embodiment, the supports 22 may be integrally formed with the housing 12 to reduce manufacturing costs.

Referring to fig. 5, fig. 5 is a schematic structural view of another embodiment of the supporting member 22 of the present invention disposed in the longitudinal opening 122. In another embodiment, as shown in FIG. 5, a plurality of transversely arranged supports 22 are disposed in the longitudinal opening 122, and the supports 22 are disposed on the inner surface of the getter layer 20, such that the getter layer 20 and the supports 22 are disposed in the longitudinal opening 122. The supporting member 22 is used to support the elastic film 14, so as to prevent the elastic film 14 from being recessed inward due to external force, which affects the operation of the patch type explosion-proof electrolytic capacitor 10. The support 22 may be a rigid structure such as a rib, metal support plate, or the like. However, the present invention is not limited thereto, and in one embodiment, at least one longitudinally arranged support member 22 may be disposed in the longitudinal opening 122. Also, in one embodiment, the supports 22 may be integrally formed with the housing 12 to reduce manufacturing costs.

In addition, in one embodiment, the thickness of the elastic film 14 is between 30um and 100um, so as to ensure the elasticity of the film while taking structural strength into consideration. In one embodiment, the elastic film 14 can completely cover the outer surface of the case 12 to replace the plastic layer covered by the conventional aluminum electrolytic capacitor case. However, the present invention is not limited thereto, and in one embodiment, the elastic film 14 may be covered with plastic, and the plastic layer may cover the outer surface of the housing 12.

To sum up, the utility model provides an explosion-proof electrolytic capacitor 10 of SMD borrows by the layer 20 of breathing in and absorbs the gas of the inside production of explosion-proof electrolytic capacitor 10 of SMD, and elasticity rete 14 outwards expands in order to hold gas, can avoid explosion-proof electrolytic capacitor 10 of SMD to damage or explode. In addition, by observing the outward expansion degree of the elastic film layer 14, the working state of the patch type explosion-proof electrolytic capacitor 10 can be judged, and corresponding measures can be taken.

Furthermore, since the air suction layer 20 is disposed in the longitudinal opening 122 and coated on the inner surface of the elastic film layer 14, the air suction layer 20 does not occupy the space of the core 18 inside the housing 12, thereby effectively ensuring the preset capacitance of the chip type explosion-proof electrolytic capacitor 10. And the patch type explosion-proof electrolytic capacitor 10 has simple integral structure and low production cost.

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

a housing having at least one longitudinal opening;

the elastic film layer covers the longitudinal opening and is attached to the outer side of the side wall 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 coated on the inner surface of the elastic film layer and is arranged in the longitudinal hole.

2. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the at least one longitudinal opening is two longitudinal openings arranged on opposite sides of the housing.

3. The patch type explosion-proof electrolytic capacitor of claim 1, wherein the at least one longitudinal opening is three longitudinal openings 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 thickness of the elastic film layer is between 30um and 100 um.

8. The patch type explosion-proof electrolytic capacitor of claim 1, wherein the elastic film layer is made of a thermoplastic elastomer.

9. The patch type explosion-proof electrolytic capacitor of claim 1 wherein the length of the longitudinal opening is less than two-thirds of the height of the housing.

10. The patch type explosion-proof electrolytic capacitor of claim 1 wherein a plurality of supporting members are disposed within the longitudinal opening for supporting the elastic membrane layer.