CN216902563U

CN216902563U - A shell for explosion-proof electrolytic capacitor and explosion-proof capacitor thereof

Info

Publication number: CN216902563U
Application number: CN202122794552.2U
Authority: CN
Inventors: 邓繁田; 李季; 董维福; 何凤荣; 卢紫琼
Original assignee: Shaoguan Dongyang Photoelectric Container Co ltd
Current assignee: Shaoguan Dongyang Photoelectric Container Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-07-05
Anticipated expiration: 2031-11-15

Abstract

The utility model belongs to the technical field of electrolytic capacitors, and particularly relates to an explosion-proof electrolytic capacitor shell and an explosion-proof capacitor thereof, wherein the explosion-proof electrolytic capacitor shell comprises: the first shell is provided with an exhaust hole; the second shell is sleeved on the outer side of the first shell, and an exhaust channel communicated with the exhaust hole is formed in the second shell; and the pressure relief assembly is arranged in the exhaust hole and a communication passage of the exhaust channel and is suitable for controlling the on-off of the exhaust channel and the exhaust hole according to the pressure in the first shell. By the structure, the problems of structural damage of the core bag, the leading strip and the like, poor heat dissipation of the core bag and the like caused by bulging deformation of the shell can be effectively avoided; meanwhile, the internal pressure of the capacitor can be effectively reduced by discharging the gas, the short circuit failure of the capacitor caused by aluminum shell bursting, content splashing and the like is avoided, and the service life of the capacitor is prolonged.

Description

A shell for explosion-proof electrolytic capacitor and explosion-proof capacitor thereof

Technical Field

The utility model belongs to the technical field of electrolytic capacitors, and particularly relates to an explosion-proof electrolytic capacitor shell and an explosion-proof capacitor thereof.

Background

The existing aluminum electrolytic capacitor generally comprises an aluminum shell, a cover plate, a core cladding, electrolyte and the like. During the use of the capacitor, hydrogen is generated when the oxide film is repaired by the electrolyte, water vapor is generated when the moisture of the electrolyte is vaporized, and gas is also generated when organic matters in the electrolyte are cracked, pyrolyzed or oxidized. The excessive gas can cause the aluminum shell to bulge and deform, so that the inner core package is loosened, the structures such as the core package, the leading strip and the like are easily damaged, and the capacitor is abnormal; meanwhile, the deformation of the aluminum shell also influences the fit degree of the core cladding and the aluminum shell, so that the core cladding has poor heat dissipation, the internal temperature of the capacitor is increased, and the service life of the capacitor product is shortened; in addition, the gas production in the capacitor is excessive, and the aluminum shell can burst and the content can splash under the condition that the internal pressure exceeds the explosion-proof pressure of the aluminum shell, so that the capacitor can rapidly lose efficacy.

Therefore, in view of the above disadvantages, it is desirable to provide a housing for an explosion-proof electrolytic capacitor and an explosion-proof capacitor thereof.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a shell for an explosion-proof electrolytic capacitor and the explosion-proof capacitor, so as to solve the problem that the structure of the capacitor is easily damaged due to internal gas generation in the prior art.

The utility model provides a housing for an explosion-proof electrolytic capacitor, which is used for the explosion-proof capacitor and comprises: the first shell is provided with an exhaust hole; the second shell is sleeved on the outer side of the first shell, and an exhaust channel communicated with the exhaust hole is formed in the second shell; and the pressure relief assembly is arranged in the exhaust hole and a communication passage of the exhaust channel and is suitable for controlling the on-off between the exhaust channel and the exhaust hole according to the pressure in the first shell.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that an accommodating groove is provided on an inner wall of the second case, and an air inlet of the exhaust passage is provided on a side wall of the accommodating groove; the pressure relief assembly comprises an elastic piece and a piston which are connected, the elastic piece is arranged in the accommodating groove, and the piston is in sliding fit with the side wall of the accommodating groove.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that an end of the piston abuts against an outer peripheral edge of the exhaust hole.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that an inner wall of the second case is bonded to an outer wall of the first case.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that the elastic member is a spring.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that the piston is a rubber plug.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that the first case and the second case are both made of an aluminum material.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that the exhaust hole and the exhaust passage are provided in a bottom plate of the case.

In the case for an explosion-proof electrolytic capacitor as described above, it is further preferable that the thickness of the bottom plate of the case is larger than the thickness of the side wall of the case.

The utility model also discloses an explosion-proof capacitor, which comprises the shell for the explosion-proof electrolytic capacitor.

Compared with the prior art, the utility model has the following advantages:

the shell for the explosion-proof electrolytic capacitor comprises a first shell, a second shell and a pressure relief assembly, wherein the first shell is provided with an exhaust hole, the second shell is provided with an exhaust channel communicated with the exhaust hole, the pressure relief assembly is arranged in a communication passage of the exhaust hole and the exhaust channel and controls the on-off of the exhaust channel and the exhaust hole based on the air pressure in the first shell, and further when the pressure in the first shell reaches a certain magnitude, the exhaust hole and the exhaust channel are communicated to discharge excessive gas, so that the problems of structural damage of a core bag, a guide strip and the like, poor heat dissipation of the core bag and the like caused by the bulging deformation of the shell are effectively avoided; meanwhile, the internal pressure of the capacitor can be effectively reduced by discharging the gas, the short circuit failure of the capacitor caused by aluminum shell bursting, content splashing and the like is avoided, and the service life of the capacitor is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic sectional view of an explosion-proof capacitor according to the present invention;

FIG. 2 is a schematic structural diagram of the first housing of FIG. 1;

fig. 3 is a schematic structural diagram of the second housing in fig. 1.

Description of reference numerals:

10-rubber plug, 20-lead wire, 30-core bag, 40-first shell and 50-second shell;

41-exhaust hole, 51-exhaust channel, 52-accommodating groove; 61-elastic element, 62-piston.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the terms in the present invention can be understood in a specific case to those skilled in the art.

The following describes housings for explosion-proof electrolytic capacitors according to some embodiments of the present invention with reference to fig. 1 to 3.

With continued reference to fig. 1-3, the housing for an explosion-proof electrolytic capacitor provided in the present embodiment is mainly for an explosion-proof capacitor, and specifically includes a first case 40, a second case 50, and a pressure relief assembly. Wherein the first casing 40 is provided with an exhaust hole 41; the second shell 50 is sleeved outside the first shell 40 and is provided with an exhaust channel 51 communicated with the exhaust hole 41; the pressure relief assembly is disposed in a communication path between the exhaust hole 41 and the exhaust channel 51, and communicates the exhaust channel 51 with the exhaust hole 41 when the pressure in the first housing 40 increases to a preset threshold, and disconnects the exhaust channel 51 from the exhaust hole 41 when the pressure is less than the preset threshold. The shell for the explosion-proof electrolytic capacitor realizes the removal of internal gas through the structure, and further realizes the pressure control inside the electrolytic capacitor, thereby effectively avoiding the problems that the shell is bulged and deformed due to the generation of gas, and further causes structural damages such as core bag 30 and leading strips, poor heat dissipation of the core bag 30 and the like; meanwhile, the internal pressure of the capacitor can be effectively reduced by discharging the gas, the short circuit failure of the capacitor caused by aluminum shell bursting, content splashing and the like is avoided, and the service life of the capacitor is prolonged.

Further, with reference to fig. 1 to 3, the inner wall of the second housing 50 is provided with an accommodating groove 52, and the side wall of the accommodating groove 52 is provided with an air inlet of the exhaust passage 51; the pressure relief assembly comprises an elastic member 61 and a piston 62 which are connected, wherein the elastic member 61 is arranged in the accommodating groove 52, and the piston 62 is in sliding fit with the side wall of the accommodating groove 52. The piston 62 is slidably mounted in the receiving groove 52, slides in the receiving groove 52 based on the elastic force of the elastic member 61 and the pressure of the gas in the first housing 40, and performs a position adjustment with the gas inlet of the gas discharge passage 51 during the sliding, thereby performing an opening or closing of the gas discharge passage 51.

Further, the elastic member 61 is a spring adapted to deform to provide a sufficient sliding space for the piston 62; the piston 62 is a rubber plug, specifically an elastic butyl rubber plug, and is adapted to cooperate with the inner wall of the receiving groove 52 to form a good sealing effect.

Further, with continued reference to fig. 1-3, the receiving groove 52 corresponds to the position of the vent hole 41 and is adapted to allow the end of the piston 62 to abut the outer peripheral edge of the vent hole 41. Further, the inner wall of the second housing 50 is attached to the outer wall of the first housing 40. The above arrangement serves, on the one hand, to avoid the gas from staying between the first housing 40 and the second housing 50 and, on the other hand, to better apply pressure to the piston 62 to cause it to move in the receiving groove 52.

Preferably, the first housing 40 and the second housing 50 are both cylindrical shell structures made of aluminum material and having an open end, the exhaust channel 51 and the exhaust hole 41 are both disposed on the bottom plate, and in order to reserve the layout space of the accommodating groove 52, the thickness of the bottom plate of the second housing 50 is greater than that of the circumferential side wall.

Specifically, the embodiment also discloses the dimension specification of each component in the shell for the explosion-proof electrolytic capacitor, specifically, the diameter of the exhaust hole 41 is 0.5 mm-0.6 mm, and the diameter of the exhaust channel 51 is 0.5 mm-0.6 mm; the thickness of the bottom plate of the second housing 50 is 6.0mm to 6.2mm, and the depth of the accommodating groove 52 is 4.0mm to 4.1 mm. The diameter of the piston 62 is 1.5mm to 1.8mm, and the thickness is 1.5mm to 1.8 mm.

Referring to fig. 1, the embodiment further discloses an explosion-proof capacitor, which includes, in addition to the above-mentioned housing for an explosion-proof electrolytic capacitor, a core package 30, a lead wire 20 and a rubber plug 10, wherein the core package 30 is disposed in the first housing 40, and an opening is sealed by the rubber plug 10, one end of the lead wire 20 is inserted into the core package 30, and the other end of the lead wire penetrates out of the rubber plug 10. The above-described explosion-proof capacitor has the same advantages as the case for the explosion-proof electrolytic capacitor, and will not be described in detail herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An enclosure for an explosion-proof electrolytic capacitor, comprising:

the first shell is provided with an exhaust hole;

the second shell is sleeved on the outer side of the first shell, and an exhaust channel communicated with the exhaust hole is formed in the second shell;

and the pressure relief assembly is arranged in the exhaust hole and a communication passage of the exhaust channel and is suitable for controlling the on-off between the exhaust channel and the exhaust hole according to the pressure in the first shell.

2. The case for the explosion-proof electrolytic capacitor as recited in claim 1, wherein an inner wall of the second case is provided with a receiving groove, and a side wall of the receiving groove is provided with an air inlet of the air discharge passage;

the pressure relief assembly comprises an elastic piece and a piston which are connected, the elastic piece is arranged in the accommodating groove, and the piston is in sliding fit with the side wall of the accommodating groove.

3. The case for an explosion-proof electrolytic capacitor as recited in claim 2, wherein an end portion of the piston abuts against an outer peripheral edge of the gas discharge hole.

4. The case for an explosion-proof electrolytic capacitor as recited in claim 3, wherein the inner wall of the second case is attached to the outer wall of the first case.

5. The case for an explosion-proof electrolytic capacitor as recited in claim 2, wherein the elastic member is a spring.

6. The case for an explosion-proof electrolytic capacitor as recited in claim 2, wherein the piston is a rubber stopper.

7. The case for an explosion-proof electrolytic capacitor as recited in claim 1, wherein the first case and the second case are each made of an aluminum material.

8. The case for an explosion-proof electrolytic capacitor as recited in any one of claims 1 to 7, wherein the exhaust hole and the exhaust passage are provided on a bottom plate of the case.

9. The case for an explosion-proof electrolytic capacitor as recited in claim 8, wherein a bottom plate thickness of the case is greater than a side wall thickness of the case.

10. An explosion-proof capacitor comprising the case for an explosion-proof electrolytic capacitor as recited in any one of claims 1 to 9.