CN216435694U - Explosion-proof housing and electrolytic capacitor - Google Patents

Abstract

The embodiment of the application provides an explosion-proof shell and an electrolytic capacitor. The explosion-proof shell comprises a shell body, wherein an explosion-proof groove is formed in the shell body, and the explosion-proof groove comprises a main groove point and a plurality of main grooves extending from the main groove point to the periphery in an emission shape; the explosion-proof groove also comprises auxiliary grooves, at least one main groove is arranged to be intersected with the auxiliary grooves, and auxiliary groove points are formed at the intersected positions. The utility model provides an explosion-proof housing, can be applied to among the electrolytic capacitor, be equipped with explosion-proof groove on the explosion-proof housing, and be equipped with main groove point and supplementary groove point in the explosion-proof groove, after explosion-proof housing inside pressure reaches a definite value, main groove point splits at first with quick release pressure, the extending direction of the main groove along of position edge that splits later extends gradually, when the position that splits extends to supplementary groove point, supplementary groove point can further quick release pressure, thereby realize the gradual release of explosion-proof housing internal pressure, avoid explosion-proof housing the situation of explosion in the twinkling of an eye to appear, electrolytic capacitor's security performance promotes.

Description

Explosion-proof housing and electrolytic capacitor

Technical Field

The application relates to the technical field of electronic components, in particular to an explosion-proof shell and an electrolytic capacitor.

Background

An electrolytic capacitor is an important element used in a large number of electronic devices, and during operation, an electrolyte inside the electrolytic capacitor may boil due to breakdown of an internal element of the electrolytic capacitor, breakage of a case, poor heat dissipation, or an excessively high voltage, which may cause breakage of the case of the electrolytic capacitor and overflow of the electrolyte. In order to avoid the problem, the conventional electrolytic capacitor shell is generally provided with an explosion-proof tank, however, the conventional explosion-proof tank structure has poor explosion-proof performance, and when the pressure inside the electrolytic capacitor is increased to a certain value, the explosion-proof tank structure cannot realize gradual release of the pressure, so that the electrolytic capacitor is easily subjected to instantaneous explosion and even fire accidents.

Disclosure of Invention

The embodiment of the application provides an explosion-proof shell and electrolytic capacitor, and the explosion-proof shell can be applied to the electrolytic capacitor, has better explosion-proof capacity, and can gradually release internal pressure, thereby avoiding the situation that the electrolytic capacitor explodes in the twinkling of an eye.

In a first aspect, an embodiment of the present application provides an explosion-proof housing, which includes a housing, where the housing is provided with an explosion-proof slot, and the explosion-proof slot includes a main slot point and a plurality of main slots extending from the main slot point to the periphery in an emission shape;

the explosion-proof groove also comprises auxiliary grooves, at least one main groove is arranged to be intersected with the auxiliary grooves, and auxiliary groove points are formed at the intersected positions.

In some embodiments, each of the primary grooves is arranged such that the secondary grooves intersect.

In some embodiments, the number of the main grooves is equal to the number of the auxiliary grooves, and each of the main grooves is disposed to intersect with one of the auxiliary grooves.

In some embodiments, the number of the main grooves is four, wherein an included angle between any two adjacent main grooves is 90 °;

the number of the auxiliary grooves is four, and the four auxiliary grooves are respectively intersected with the four auxiliary grooves to form four auxiliary groove points.

In some embodiments, the number of the main grooves is three, wherein an included angle between any two adjacent main grooves is 120 °;

the number of the auxiliary grooves is three, and the three auxiliary grooves are respectively intersected with the three auxiliary grooves to form three auxiliary groove points.

In some embodiments, the number of the auxiliary grooves is greater than the number of the main grooves, and each of the main grooves is disposed to intersect with a plurality of the auxiliary grooves.

In some embodiments, the housing comprises a barrel and a bottom cover, the bottom cover is connected with one end of the barrel, and the explosion-proof groove is arranged on the bottom cover.

In some embodiments, the explosion-proof groove is formed in a side surface of the bottom cover, which faces away from the barrel body.

In some embodiments, the explosion-proof groove is formed in a side surface of the bottom cover facing the barrel.

In a second aspect, embodiments of the present application provide an electrolytic capacitor including an explosion-proof enclosure as described above.

The utility model provides an explosion-proof housing, can be applied to among the electrolytic capacitor, be equipped with explosion-proof groove on the explosion-proof housing, and be equipped with main groove point and supplementary groove point in the explosion-proof groove, after explosion-proof housing inside pressure reaches a definite value, main groove point splits at first with quick release pressure, the extending direction of the main groove along of position edge that splits later extends gradually, when the position that splits extends to supplementary groove point, supplementary groove point can further quick release pressure, thereby realize the gradual release of explosion-proof housing internal pressure, avoid explosion-proof housing the situation of explosion in the twinkling of an eye to appear, electrolytic capacitor's security performance promotes.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of an explosion-proof enclosure provided in an embodiment of the present application.

Fig. 2 is a first structural schematic diagram of an explosion-proof groove on the explosion-proof housing in fig. 1.

FIG. 3 is a second schematic view of the vent in the vent housing of FIG. 1.

FIG. 4 is a third schematic view of an explosion vent in the explosion proof enclosure of FIG. 1.

FIG. 5 is a fourth schematic view of an explosion vent in the explosion proof enclosure of FIG. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an explosion-proof housing according to an embodiment of the present disclosure, fig. 2 is a schematic structural diagram of an explosion-proof slot on the explosion-proof housing of fig. 1, and fig. 3 is a schematic structural diagram of an explosion-proof slot on the explosion-proof housing of fig. 1. The embodiment of the application provides an explosion-proof housing 100, which comprises a housing 10, wherein an explosion-proof groove 11 is arranged on the housing 10, and the explosion-proof groove 11 comprises a main groove point 113 and a plurality of main grooves 111 extending from the main groove point 113 to the periphery in an emission shape; the explosion-proof tank 11 further includes auxiliary grooves 112, and at least one main groove 111 is disposed to intersect the auxiliary grooves 112 at a position where an auxiliary tank point 114 is formed.

In the embodiments of the present application, a plurality means two or more, for example, three, four, five, six, seven, eight, nine, ten, and the like.

Illustratively, each of the main grooves 111 is provided such that the auxiliary grooves 112 intersect.

Referring to fig. 2 and 3, the number of the main grooves 111 and the number of the auxiliary grooves 112 may be equal, and each main groove 111 is disposed to intersect with one auxiliary groove 112.

Referring to fig. 4, fig. 4 is a schematic view of a third structure of the explosion-proof slot on the explosion-proof housing of fig. 1. The number of the auxiliary grooves 112 is greater than the number of the main grooves 111, and each of the main grooves 111 may be disposed to intersect with a plurality of the auxiliary grooves 112.

The working principle of the explosion-proof groove 11 is as follows: when the electrolytic capacitor generates a large amount of gas due to rapid heating of electrolyte caused by overvoltage or leakage current, the electrolytic capacitor is filled with high-pressure gas, the end cover of the electrolytic capacitor expands outwards to form a spherical surface, when the internal pressure intensity is unchanged, the surface curvature is smaller, the pressure is higher, particularly, the pressure borne by the center position on the end cover is the largest, because the explosion-proof groove 11 is arranged on the end cover, the end cover starts to break from the position of the main groove point 113, if the internal pressure intensity is high, the break can continue to break along with the cross-shaped or Y-shaped groove, and therefore the internal pressure of the electrolytic capacitor is gradually released to avoid instantaneous explosion of the electrolytic capacitor.

The explosion-proof shell 100 provided by the embodiment of the application can be applied to an electrolytic capacitor, the explosion-proof shell 100 is provided with the explosion-proof slot 11, the explosion-proof slot 11 is provided with the main slot point 113 and the auxiliary slot point 114, when the internal pressure of the explosion-proof shell 100 reaches a certain value, the main slot point 113 firstly splits to release the pressure quickly, the extending direction of the main slot 111 along the splitting position gradually extends, when the splitting position extends to the auxiliary slot point 114, the auxiliary slot point 114 can further release the pressure quickly, so that the gradual release of the internal pressure of the explosion-proof shell 100 is realized, the condition of instant explosion of the explosion-proof shell 100 is avoided, and the safety performance of the electrolytic capacitor is improved. In addition, the auxiliary groove point 114 can also serve an emergency function when the main groove point 113 fails, and when a large pressure is generated inside the explosion proof housing 100, the auxiliary groove point 114 is first ruptured to rapidly release the pressure.

It can be understood that, since the main slot point 113 and the auxiliary slot point 114 are both the intersections of a plurality of (two or more) slots, that is, the main slot point 113 and the auxiliary slot point 114 are located at the weakest and least pressure-resistant positions on the explosion-proof enclosure 100, since the main slot point 113 is generally formed by 3 or 4 intersecting main slots 111 and the auxiliary slot point 114 is generally formed by 2 intersecting auxiliary slots 112, the main slot point 113 is located at the least pressure-resistant position, and the auxiliary slot point 114 is located at the second order, when the pressure inside the explosion-proof enclosure 100 reaches a certain value, the main slot point 113 is firstly ruptured to release more pressure, and then the ruptured position gradually extends along the extending direction of the main slot 111, and when the ruptured position extends to the auxiliary slot point 114, the position of the auxiliary slot point 114 is also weak to release more pressure again, and thereafter the ruptured position extends along the extending direction of the main slot 111 and the extending direction of the auxiliary slot 112 respectively, the pressure is released in multiple directions, and the effect of avoiding instantaneous explosion of the explosion-proof housing 100 can be achieved by releasing the pressure layer by layer.

It should be noted that, no auxiliary groove point is arranged in the explosion-proof groove of the existing explosion-proof housing, that is, the existing explosion-proof groove only includes a main groove point and a plurality of main grooves extending from the main groove point to the periphery in an emitting manner, it can be seen that when the explosion-proof groove of such a structure is subjected to pressure, an instant explosion is mainly generated at the main groove point position to rapidly release the pressure, and then the rupture position gradually extends along the extending direction of the main groove to slowly release the pressure, and by simultaneously arranging the main groove point 113 and the auxiliary groove point 114, the rapid release of the pressure can be realized at two positions of the main groove point 113 and the auxiliary groove point 114, so that the gradual release of the pressure is realized, the situation of the instant explosion of the explosion-proof housing 100 caused by the excessively slow release speed of the pressure inside the explosion-proof housing 100 can be avoided, and the safety performance of the electrolytic capacitor is improved.

Referring to fig. 2, the number of the main grooves 111 may be four, wherein an included angle between any two adjacent main grooves 111 is 90^°That is, the four main grooves 111 are combined into a cross shape.The number of the auxiliary grooves 112 is four, and the four auxiliary grooves 112 intersect with the four auxiliary grooves 112 respectively to form four auxiliary groove points 114.

Referring to fig. 3, the number of the main grooves 111 may be three, wherein an included angle between any two adjacent main grooves 111 is 120^°That is, the three main grooves 111 are combined in a "Y" shape. The number of the auxiliary grooves 112 is three, and the three auxiliary grooves 112 intersect with the three auxiliary grooves 112 respectively to form three auxiliary groove points 114.

It is understood that the number of the main grooves 111 may be set to other values, such as two, five, six, seven, eight, etc., and each main groove 111 may be set such that one, two, three, four, five, six, etc., of the auxiliary grooves 112 intersect, thereby forming one, two, three, four, five, six, or even more auxiliary groove points 114 on each main groove 111.

Illustratively, the shape of the main groove 111 may be a straight line, an arc, a wavy line, or the like, and the shape of the auxiliary groove 112 may be a straight line, an arc, a wavy line, or the like.

Illustratively, the main trench 111 and the auxiliary trench 112 may perpendicularly intersect.

Referring to fig. 1, the housing 10 includes a cylinder 13 and a bottom cover 12, the bottom cover 12 is connected to one end of the cylinder 13, and the explosion-proof slot 11 is disposed on the bottom cover 12.

Illustratively, the barrel 13 may be cylindrical.

Illustratively, the bottom cover 12 has a circular shape, and the main slot point 113 may be disposed at the center of the bottom cover 12.

Illustratively, the explosion-proof groove 11 may be provided on a side surface of the bottom cover 12 facing away from the barrel 13. That is, the explosion-proof groove 11 is provided at the outer side surface of the bottom cover 12.

Illustratively, the explosion-proof groove 11 may be provided on a side surface of the bottom cover 12 facing the barrel 13. That is, the explosion-proof groove 11 is provided at the inner side surface of the bottom cover 12.

Referring to fig. 5, fig. 5 is a schematic view of a fourth structure of the explosion-proof slot on the explosion-proof enclosure of fig. 1. When the explosion-proof groove 11 is formed on a side surface (i.e., an inner side surface) of the bottom cover 12 facing the cylinder 13, the explosion-proof housing 100 may further include a buffer member 14, the buffer member 14 may be formed in the explosion-proof groove 11, and the buffer member 14 has a porous structure. It can be understood that, when the pressure inside the explosion-proof housing 100 reaches a certain value, and the explosion-proof tank 11 is damaged, the buffer 14 can buffer the electrolyte sprayed out from the damaged part of the explosion-proof tank 11, so as to reduce the spraying speed of the electrolyte sprayed out from the damaged part of the explosion-proof tank 11, shorten the spraying distance of the electrolyte, and reduce the number of electronic components affected by the electrolyte around the electrolytic capacitor.

Illustratively, the buffer 14 may be a sponge.

For example, when the explosion-proof groove 11 is formed on a side surface (i.e., an inner side surface) of the bottom cover 12 facing the barrel 13, a side surface of the bottom cover 12 facing away from the barrel 13 may be provided with an identification film. The identification film can be used for reflecting product information such as a positive electrode identification, a negative electrode identification, capacity, a manufacturer and the like, and the product information is positioned at the tail part of the electrolytic capacitor, so that a user can conveniently know the related product information of the electrolytic capacitor.

Illustratively, the identification film may be formed on the bottom cover 12 by printing or attached to the bottom cover 12 in the form of a film.

Illustratively, when the bottom cover 12 is circular, the length of the main groove 111 may be 20% to 90%, such as 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, etc., of the radius of the bottom cover 12.

Illustratively, the bottom cover 12 has a thickness of 0.06mm to 0.1mm, such as 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, and the like.

Illustratively, the depth of the main groove 111 may be 0.03mm to 0.05mm, such as 0.03mm, 0.04mm, 0.05mm, and the like.

Illustratively, the depth of the auxiliary groove 112 may be 0.03mm to 0.05mm, such as 0.03mm, 0.04mm, 0.05mm, and the like.

Illustratively, the material of the housing 10 is metal, such as aluminum (Al).

Illustratively, the inner surface of the case 10 may be provided with an insulating film to prevent the electrolyte inside the explosion-proof housing 100 from corroding the case 10, and to prevent the positive electrode foil from contacting the case 10 (usually made of metal) to cause "sparking" in case of vibration.

The embodiment of the application provides an electrolytic capacitor, which comprises the explosion-proof housing 100 in any one of the embodiments.

The electrolytic capacitor can be applied to household appliances such as air conditioners, radio recorders, washing machines and communicators, electronic complete machines, instruments and meters.

Illustratively, the electrolytic capacitor may further include a core package disposed inside the explosion-proof housing 100, the core package being sealed inside the explosion-proof housing 100 after being impregnated with the electrolyte, and the core package being formed by winding a positive electrode foil, a negative electrode foil and an electrolytic paper.

Illustratively, a layer of gasket can be arranged between the bottom of the core bag and the bottom cover 12, and the gasket can isolate the explosion-proof slot 11 from the core bag, so that the requirements on the smoothness of the edge of the slot body of the explosion-proof slot 11 can be reduced, and the processing of the explosion-proof shell 100 becomes simpler. In addition, under the effect of the gasket, the bottom of the core bag is not scratched by the edge of the groove body of the explosion-proof groove 11, and when the electrolytic capacitor explodes, the gasket can play a certain buffering role, so that the electrolyte is prevented from being directly sprayed to the outside of the electrolytic capacitor, and the surrounding electronic elements and circuits are prevented from being damaged.

Illustratively, the gasket may also be a porous structural material, such as a sponge or the like.

Exemplarily, the electrolytic capacitor can further comprise a rubber plug, and the rubber plug can fix the core bag to avoid the leakage of electrolyte in the core bag.

Illustratively, the electrolytic capacitor may further include pins, one end of which is connected to the core pack and the other end of which extends out of the explosion proof housing 100 through the plug at the end opposite to the bottom cover 12. It is understood that the electrolytic capacitor can electrically connect the core package in the explosion-proof housing 100 with the circuit by using the pins, so that the electrolytic capacitor plays a proper role in the circuit.

Exemplarily, the electrolytic capacitor can further include a plastic sleeve, the plastic sleeve is sleeved outside the explosion-proof housing 100, and can protect the surface of the explosion-proof housing 100 to prevent the surface from being scratched or corroded, and can achieve an insulating effect to prevent other electronic components from being affected.

The explosion-proof housing and the electrolytic capacitor provided by the embodiment of the application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. An explosion-proof shell is characterized by comprising a shell, wherein an explosion-proof groove is arranged on the shell, and the explosion-proof groove comprises a main groove point and a plurality of main grooves extending from the main groove point to the periphery in an emission shape;

the explosion-proof groove also comprises auxiliary grooves, at least one main groove is arranged to be intersected with the auxiliary grooves, and auxiliary groove points are formed at the intersected positions.

2. An explosion proof housing as claimed in claim 1 wherein each of said primary grooves is arranged such that said secondary grooves intersect.

3. An explosion proof housing as set forth in claim 2 wherein the number of said primary grooves is equal to the number of said secondary grooves, each of said primary grooves being disposed to intersect one of said secondary grooves.

4. The explosion proof housing of claim 3 wherein the number of said primary grooves is four, wherein the included angle between any two adjacent primary grooves is 90 °;

the number of the auxiliary grooves is four, and the four auxiliary grooves are respectively intersected with the four auxiliary grooves to form four auxiliary groove points.

5. The explosion proof housing of claim 3 wherein the number of primary grooves is three, wherein the included angle between any two adjacent primary grooves is 120 °;

the number of the auxiliary grooves is three, and the three auxiliary grooves are respectively intersected with the three auxiliary grooves to form three auxiliary groove points.

6. An explosion proof housing as set forth in claim 2 wherein the number of said secondary grooves is greater than the number of said primary grooves, each of said primary grooves being disposed to intersect a plurality of said secondary grooves.

7. The explosion proof housing of any one of claims 1 to 6 wherein said housing comprises a barrel and a bottom cover, said bottom cover being attached to one end of said barrel, said explosion proof slot being provided in said bottom cover.

8. The explosion proof housing of claim 7 wherein said explosion proof slot is provided in a side surface of said bottom cover facing away from said barrel.

9. The explosion proof housing of claim 7 wherein said explosion proof slot is provided in a side surface of said bottom cover facing said barrel.

10. An electrolytic capacitor comprising an explosion-proof housing as claimed in any one of claims 1 to 9.

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