Film capacitor with aluminum shell

Abstract

The utility model discloses a film capacitor with an aluminum shell, which comprises a shell and a core bag arranged in the shell, and pins penetrating through the shell are arranged at the bottom end of the core bag. The explosion-proof assembly comprises an end cover and a movable plug plate, the end cover is arranged at the end, away from the pins, of the shell, the movable plug plate is movably arranged at the end, close to the end cover, of the interior of the shell, and an elastic piece is arranged between the movable plug plate and the end cover; after the internal pressure of the shell is increased, the movable plug plate extrudes the elastic piece and gradually abuts against the end cover, and the end cover is resistant to pressure and explosion. According to the utility model, through the arrangement of the explosion-proof assembly, when the pressure in the shell is increased, the movable plug plate moves downwards and extrudes the elastic sheet, the elastic sheet deforms and can play a role in buffering the pressure, and after the movable plug plate moves downwards, the space between the core package and the movable plug plate is enlarged, so that a certain pressure balancing role is played; the end cover is a solid plate body and can play a role in pressure resistance and explosion prevention.

Description

Technical Field

[0001] The utility model belongs to the technical field of film capacitors, in particular to an aluminum shell film capacitor. Background Art

[0002] A capacitor is an electronic component that is used to store and release electrical energy.

[0003] Most of the film capacitors in the prior art do not have a pressure relief and explosion-proof structure. When the film capacitor works at high pressure, gas is easily generated in the shell, and the pressure in the shell also increases accordingly. When the pressure inside the shell is too high, the shell will expand and deform outward, which will cause the film capacitor to explode, and the explosion-proof effect is poor. Utility Model Content

[0004] The utility model aims at solving the problems in the prior art and proposes the following technical solutions:

[0005] The utility model provides an aluminum shell film capacitor, comprising:

[0006] A shell and a core package arranged inside the shell, wherein the bottom end of the core package is provided with a pin penetrating the shell;

[0007] An explosion-proof component, the explosion-proof component comprising an end cover and a movable plug plate, the end cover being arranged on an end of the housing away from the pin, the movable plug plate being movably arranged at an end of the housing close to the end cover, and a spring sheet being arranged between the movable plug plate and the end cover;

[0008] When the internal pressure of the shell increases, the movable plug plate squeezes the spring sheet and gradually abuts against the end cover, and the end cover is pressure-resistant and explosion-proof.

[0009] As a preferred embodiment of the above technical solution, a compression-resistant vertical plate and a compression-resistant horizontal plate are symmetrically arranged in sequence at one end of the end cover close to the movable plug plate.

[0010] As a preferred embodiment of the above technical solution, a limiting groove is formed between the two pressure-resistant cross plates and the end cover, and a connecting plate is provided at one end of the movable plug plate close to the end cover. The connecting plate is arranged in the limiting groove and can slide along the limiting groove, and the spring sheet is arranged on both sides between the movable plug plate and the pressure-resistant cross plate.

[0011] As a preferred embodiment of the above technical solution, fixing rings are symmetrically arranged at both ends of the exterior of the shell, and a honeycomb explosion-proof net is arranged between the fixing rings along the circumference of the shell.

[0012] As a preferred embodiment of the above technical solution, the end cover, the compression-resistant vertical plate and the compression-resistant horizontal plate are all solid plates.

[0013] The beneficial effects of the utility model are:

[0014] (1) The utility model provides an explosion-proof component. When the pressure in the shell increases, the movable plug plate will move downward and squeeze the spring sheet. The deformation of the spring sheet can buffer the pressure. After the movable plug plate moves downward, the space between the core package and the movable plug plate is increased, which plays a role in balancing the pressure. The end cover is a solid plate body, which can play a role in pressure resistance and explosion prevention.

[0015] (2) The utility model can wrap the outside of the shell by forming a whole through the setting of the fixing ring and the honeycomb explosion-proof net, reducing the probability of expansion and bulging deformation in the middle of the shell, thereby further improving the explosion-proof performance of the film capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a schematic diagram of the overall structure of the capacitor in the embodiment;

[0017] Figure 2 Shown is a schematic cross-sectional view of a capacitor in an embodiment;

[0018] Figure numerals: 10, core package; 11, pin; 20, shell; 30, explosion-proof component; 31, end cover; 32, pressure-resistant horizontal plate; 33, pressure-resistant vertical plate; 34, movable plug plate; 35, connecting plate; 36, spring piece; 41, fixing ring; 42, honeycomb explosion-proof net. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0020] Example

[0021] like Figure 1 , Figure 2 As shown, Figure 1 What is shown is a schematic diagram of the overall structure of the capacitor in the embodiment; Figure 2 Shown is a schematic cross-sectional view of a capacitor in an embodiment;

[0022] The device includes:

[0023] A shell 20 and a core package 10 disposed inside the shell 20 , wherein a pin 11 penetrating through the shell 20 is disposed at the bottom end of the core package 10 ;

[0024] The explosion-proof assembly 30 includes an end cover 31 and a movable plug plate 34. The end cover 31 is disposed on an end of the housing 20 away from the pin 11. The movable plug plate 34 is movably disposed inside the housing 20 at an end close to the end cover 31. A spring 36 is disposed between the movable plug plate 34 and the end cover 31.

[0025] When the internal pressure of the housing 20 increases, the movable plug plate 34 squeezes the spring sheet 36 and gradually abuts against the end cover 31 , and the end cover 31 is pressure-resistant and explosion-proof.

[0026] By setting up the explosion-proof component 30, when the pressure in the shell 20 increases, the movable plug plate 34 will move downward and squeeze the spring plate 36. The deformation of the spring plate 36 can buffer the pressure, and the downward movement of the movable plug plate 34 increases the space between the core package 10 and the movable plug plate 34, which plays a role in balancing the pressure to a certain extent; the end cover 31 is a solid plate body, which can also play a role in pressure resistance and explosion prevention.

[0027] Specifically, the spring piece 36 is C-shaped, which can buffer the pressure and drive the movable plug plate 34 to return to its original position; the shell 20 is made of aluminum, which can provide mechanical protection and heat dissipation.

[0028] like Figure 1 , Figure 2 As shown, Figure 1 What is shown is a schematic diagram of the overall structure of the capacitor in the embodiment; Figure 2 Shown is a schematic cross-sectional view of a capacitor in an embodiment;

[0029] One end of the end cover 31 close to the movable stopper plate 34 is symmetrically provided with a pressure-resistant vertical plate 33 and a pressure-resistant horizontal plate 32 in sequence, and a limiting groove is formed between the two pressure-resistant horizontal plates 32 and the end cover 31. One end of the movable stopper plate 34 close to the end cover 31 is provided with a connecting plate 35, which is arranged in the limiting groove and can slide along the limiting groove; the spring sheet 36 is arranged on both sides between the movable stopper plate 34 and the pressure-resistant horizontal plate 32.

[0030] The compression-resistant vertical plate 33 and the compression-resistant horizontal plate 32 are also solid plates. The compression-resistant vertical plate 33 and the compression-resistant horizontal plate 32 can assist the end cover 31 to further resist pressure and explosion. Specifically, the movable plug plate 34 is set in a T-shape, and one end thereof is movably set in the limit groove through a connecting plate 35, which limits the movement range and trajectory of the movable plug plate 34.

[0031] If the internal pressure of the shell 20 is too high, the movable plug plate 34 is pushed to abut against the end cover 31, and the end cover 31 and the pressure-resistant vertical plate 33 and the pressure-resistant horizontal plate 32 cooperate to play a further pressure-resistant role.

[0032] Fixed rings 41 are symmetrically arranged at both ends of the outer portion of the shell 20 , and a honeycomb explosion-proof net 42 is arranged between the fixed rings 41 along the circumference of the shell 20 .

[0033] The honeycomb explosion-proof net 42 is arranged outside the shell 20. The fixing ring 41 and the honeycomb explosion-proof net 42 can form a whole to wrap the outside of the shell 20, reducing the probability of expansion, bulging and deformation in the middle of the shell 20, thereby further improving the explosion-proof performance of the film capacitor.

[0034] Working principle: When the pressure in the shell 20 of the device increases, the movable plug plate 34 will move downward and squeeze the spring sheet 36. The deformation of the spring sheet 36 can buffer the pressure, and the downward movement of the movable plug plate 34 increases the space between the core package 10 and the movable plug plate 34, which plays a role in balancing the pressure to a certain extent; at the same time, the end cover 31 and the pressure-resistant vertical plate 33 and the pressure-resistant horizontal plate 32 cooperate to play a further pressure-resistant role; when the pressure in the shell 20 is restored, under the action of the spring sheet 36, the movable plug plate 34 returns to its original position, which can buffer and balance the next increase in the internal pressure of the shell 20.

[0035] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. Aluminum shell film capacitor, characterized by: include: A shell (20) and a core package (10) arranged inside the shell (20), wherein a pin (11) penetrating the shell (20) is arranged at the bottom end of the core package (10); An explosion-proof component (30), the explosion-proof component (30) comprising an end cover (31) and a movable plug plate (34), the end cover (31) being arranged on an end of the housing (20) away from the pin (11), the movable plug plate (34) being movably arranged inside the housing (20) at an end close to the end cover (31), and a spring sheet (36) being arranged between the movable plug plate (34) and the end cover (31); When the internal pressure of the housing (20) increases, the movable plug plate (34) squeezes the spring sheet (36) and gradually abuts against the end cover (31), and the end cover (31) is pressure-resistant and explosion-proof.

2. The aluminum shell film capacitor according to claim 1, characterized in that: An end of the end cover (31) close to the movable plug plate (34) is symmetrically provided with a compression-resistant vertical plate (33) and a compression-resistant horizontal plate (32) in sequence.

3. The aluminum shell film capacitor according to claim 2, characterized in that: A limiting groove is formed between the two anti-pressure transverse plates (32) and the end cover (31); a connecting plate (35) is provided at one end of the movable plug plate (34) close to the end cover (31); the connecting plate (35) is arranged in the limiting groove and can slide along the limiting groove; and the spring sheet (36) is arranged at positions on both sides between the movable plug plate (34) and the anti-pressure transverse plate (32).

4. The aluminum shell film capacitor according to claim 1, characterized in that: Fixed rings (41) are symmetrically arranged at both ends of the exterior of the shell (20), and a honeycomb explosion-proof net (42) is arranged between the fixed rings (41) along the circumference of the shell (20).

5. The aluminum shell film capacitor according to claim 3, characterized in that: The end cover (31), the compression-resistant vertical plate (33) and the compression-resistant horizontal plate (32) are all solid plates.

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