Aluminum electrolytic capacitor with composite explosion-proof lines

Abstract

The utility model relates to an aluminum electrolytic capacitor with composite explosion-proof lines, which belongs to the technical field of aluminum electrolytic capacitors and comprises a capacitor main body, the capacitor main body is of a cylindrical structure, an aluminum shell is coated on the outer side of the capacitor main body, main explosion-proof lines are arranged at the end part of the aluminum shell, and an insulating layer is coated outside the aluminum shell. The aluminum shell is provided with main explosion-proof lines, the main explosion-proof lines are in an exposed state, the side face of the aluminum shell is provided with auxiliary explosion-proof lines in a circumferential array mode, the auxiliary explosion-proof lines are wrapped in the insulating layer, the main explosion-proof lines are of a radial structure, the inner sides of the main explosion-proof lines are of a W-shaped structure, and the auxiliary explosion-proof lines are of an inverted-U-shaped structure. When the internal pressure of the capacitor main body is increased, the main explosion-proof lines and the auxiliary explosion-proof lines are cracked, the effect of simultaneously releasing pressure at the end part and the side surface is achieved, the pressure releasing speed is improved, the overall explosion risk is reduced, and by increasing the contact area with the outside, the heat dissipation performance during use is improved, the heat accumulation is reduced, and the safety during use is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminum electrolytic capacitor technical field, in particular to a kind of aluminum electrolytic capacitor with composite anti-explosion line. BACKGROUND

[0002] Aluminum electrolytic capacitor is made of aluminum cylinder as negative pole, with liquid electrolyte inside, insert a piece of curved aluminum strip as positive pole. It also needs to be treated by direct current voltage, so that a layer of oxide film is formed on the positive pole piece as dielectric. Its characteristics are large capacity, but large leakage, poor stability, positive and negative polarity, suitable for power filter or low-frequency circuit, and applied in the circuit board of some modern electrical equipment. In the use of aluminum electrolytic capacitor, to avoid the problem of strong explosion, a slot similar to scratch is usually opened at one end position, which is a man-made design of weak point of pressure, a safety valve. When the capacitor bursts due to external pressure or excessive voltage, the anti-explosion line will crack, releasing the internal pressure and avoiding strong explosion. However, the current capacitor pressure relief is only at the end position, and the pressure relief speed is slow. In addition, the capacitor generates a lot of heat during use, and the current capacitor also has the problem of heat accumulation, affecting the safety of use. SUMMARY

[0003] To overcome the technical defects of the prior art, the utility model provides an aluminum electrolytic capacitor with composite anti-explosion line, which has composite pressure relief at the end and side, fast pressure relief speed, reduces the overall explosion risk, and improves the heat dissipation effect during use.

[0004] The technical solution adopted by the utility model is: an aluminum electrolytic capacitor with composite anti-explosion line, comprising a capacitor body, the capacitor body is in cylindrical structure, the outer side of the capacitor body is covered with an aluminum shell, and the end of the aluminum shell is provided with a main anti-explosion line, the outer part of the aluminum shell is covered with an insulating layer, the main anti-explosion line is in a bare state, the side of the aluminum shell is provided with a plurality of secondary anti-explosion lines in a circumferential array, the secondary anti-explosion lines are covered inside the insulating layer. When in use, the capacitor body is connected with an external circuit board, high pressure is generated inside the capacitor body, and the pressure needs to be released. The main anti-explosion line and the secondary anti-explosion line crack to release pressure and avoid strong explosion. The main anti-explosion line and the secondary anti-explosion line facilitate simultaneous pressure relief of the end and side of the capacitor body, improve the pressure relief speed, and improve the safety of use.

[0005] Preferably, the lower end of the capacitor body is symmetrically provided with a positive electrode pin and a negative electrode pin. The positive electrode pin and the negative electrode pin facilitate installation on an external circuit.

[0006] Preferably, the main explosion-proof pattern is in a radial structure, and the inner side of the main explosion-proof pattern is in a W-shaped structure, which not only prevents the risk of overall explosion, but also improves the heat dissipation performance of the end position when in use.

[0007] Preferably, the auxiliary explosion-proof pattern is in an inverted U-shaped structure, which is cracked when pressure relief, so that the upper end is bent, and the whole is in a flower shape, which not only facilitates pressure relief on the side, but also facilitates the guidance of the impact of pressure, so that the impact force during pressure relief is upward.

[0008] Preferably, the insulation layer is made of high-thermal-conductivity rubber film, which improves the overall heat dissipation performance, and the insulation layer is torn when the auxiliary explosion-proof pattern is cracked, avoiding blocking the pressure during pressure relief.

[0009] Preferably, the upper end and the lower end of the auxiliary explosion-proof pattern on the aluminum shell are pressed to form pressure relief grooves, and the pressure relief grooves are in an arc-shaped structure, so that when slight pressure increase occurs in the capacitor body, the pressure relief grooves are deformed, facilitating pressure relief.

[0010] Preferably, the insulation layer is in a cladding state with the pressure relief grooves below, and a cavity is left between the insulation layer and the pressure relief grooves above, and heat dissipation fins in an annular structure are fixedly installed in the pressure relief grooves above, which improve the heat dissipation performance of the capacitor body by using the heat conduction effect of the heat dissipation fins.

[0011] Preferably, the insulation layer is provided with air holes in an annular structure at the position of the pressure relief grooves above, so that the heat dissipation fins are in contact with the external air, thereby facilitating the diffusion of heat on the heat dissipation fins to the external air.

[0012] The beneficial effects of the capacitor body are as follows: the radial main explosion-proof pattern and the inverted U-shaped auxiliary explosion-proof pattern are adopted, the main explosion-proof pattern and the auxiliary explosion-proof pattern are cracked when the pressure in the capacitor body increases, the effect of simultaneously relieving pressure at the end and the side is achieved, the pressure relief speed is improved, the overall explosion risk is reduced, the contact area with the outside is increased, the heat dissipation performance in use is improved, the heat accumulation is reduced, and the safety in use is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the capacitor body.

[0014] Figure 2 It is a structure schematic view of the capacitor body.

[0015] Figure 3 It is a structure schematic view of the capacitor body.

[0016] Figure 4 It is the structure schematic view of the position A in the utility model 3 after local amplification.

[0017] Figure 5 It is the structure schematic view of the position of the main explosion-proof pattern in the utility model.

[0018] Mark explanation: in the drawing: 1, capacitor main body;2, aluminum shell;3, main explosion-proof pattern;4, insulating layer;5, auxiliary explosion-proof pattern;6, positive electrode pin;7, negative electrode pin;8, pressure relief groove;9, heat dissipation fin;10, air hole. Specific implementation

[0019] The utility model will be further described below in combination with the drawings:

[0020] As Figures 1-5 shown, the embodiment provides an aluminum electrolytic capacitor with composite explosion-proof pattern, including capacitor main body 1, capacitor main body 1 is cylindrical structure, the outside of capacitor main body 1 is covered with aluminum shell 2, and the end of aluminum shell 2 is provided with main explosion-proof pattern 3, the outside of aluminum shell 2 is covered with insulating layer 4, main explosion-proof pattern 3 is in the naked state, the side of aluminum shell 2 is provided with auxiliary explosion-proof pattern 5 in the form of circumferential array, auxiliary explosion-proof pattern 5 is covered inside insulating layer 4, when using, capacitor main body 1 is connected with external circuit board, high pressure is generated in the inside of capacitor main body 1, when needing to release pressure, main explosion-proof pattern 3 and auxiliary explosion-proof pattern 5 crack, pressure relief is carried out, and strong explosion phenomenon is avoided, and through main explosion-proof pattern 3 and auxiliary explosion-proof pattern 5, the end and the side of capacitor main body 1 are simultaneously pressure relieved, the pressure relief speed is improved, the use safety is improved, and through insulating layer 4, the outer layer is conveniently insulated and protected, the lower end of capacitor main body 1 is symmetrically provided with positive electrode pin 6 and negative electrode pin 7, through positive electrode pin 6 and negative electrode pin 7, capacitor main body 1 is conveniently installed on the external circuit, and capacitor main body 1 is conveniently installed.

[0021] As a technical optimization scheme of the utility model, specifically Figure 5 As shown, main explosion-proof pattern 3 is in the form of radial structure, and the inside of main explosion-proof pattern 3 is in the form of W structure, when using, not only the risk of overall explosion is prevented, but also the contact area with external air is improved, and the heat dissipation performance of the end position is improved.

[0022] As a technical optimization scheme of the utility model, specifically Figure 2As shown, the auxiliary explosion-proof pattern 5 is inverted U-shaped structure, when pressure relief, the auxiliary explosion-proof pattern 5 is cracked, so that the upper end is bent, the whole is flower-shaped distribution, not only facilitate the side pressure relief, and facilitate the impact of pressure to guide, so that the impact force upward when pressure relief, avoid the influence on the surrounding electrical elements, the insulating layer 4 is made of high thermal conductivity rubber film, improve the overall heat dissipation performance, and when the auxiliary explosion-proof pattern 5 is cracked, the insulating layer 4 is torn, avoid the pressure when pressure relief to block.

[0023] As a technical optimization scheme of the utility model, specifically as Figures 2 to 4 As shown, the aluminum shell 2 is located at the upper end and the lower end of the auxiliary explosion-proof pattern 5 and is pressed to form a pressure relief groove 8, the pressure relief groove 8 is arc-shaped structure, through the pressure relief groove 8, when the slight pressure increase occurs in the capacitor body 1, the pressure relief groove 8 is deformed, facilitating pressure relief, reducing the risk of explosion, the insulating layer 4 is in a cladding state to the lower pressure relief groove 8, the insulating layer 4 and the upper pressure relief groove 8 leave a cavity, and the inner portion of the upper pressure relief groove 8 is fixedly installed with a ring-shaped heat dissipation fin 9, through the heat dissipation fin 9, the heat dissipation performance of the capacitor body 1 is improved by using the heat conduction effect, reducing the accumulation of heat, the insulating layer 4 is provided with a ring-shaped air hole 10 at the position of the upper pressure relief groove 8, through the air hole 10, the heat dissipation fin 9 is in contact with the external air, and then the heat on the heat dissipation fin 9 is diffused to the external air, improving the heat dissipation effect.

[0024] The basic principles, main features and advantages of the present application are shown and described above, and those skilled in the art should understand that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, without departing from the spirit and scope of the present application, the present application will have various changes and improvements, these changes and improvements all fall within the scope of the claimed present application, the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An aluminum electrolytic capacitor with a composite explosion-proof pattern, characterized by: Including capacitor body (1), the capacitor body (1) is cylindrical structure, the outer side of capacitor body (1) is covered with aluminum shell (2), and the end of aluminum shell (2) is provided with main explosion-proof note (3), the outside of aluminum shell (2) is covered with insulating layer (4), main explosion-proof note (3) is in bare state, the side of aluminum shell (2) is provided with vice explosion-proof note (5) in circumferential array, vice explosion-proof note (5) is covered inside insulating layer (4).

2. The aluminum electrolytic capacitor with a composite anti-explosion pattern according to claim 1, wherein: The lower end of the capacitor body (1) is symmetrically mounted with a positive electrode pin (6) and a negative electrode pin (7).

3. The aluminum electrolytic capacitor with a composite anti-explosion pattern according to claim 1, wherein: The main explosion-proof note (3) is in a radial structure, and the inner side of the main explosion-proof note (3) is in a W-shaped structure.

4. The aluminum electrolytic capacitor with a composite anti-explosion pattern according to claim 1, wherein: The vice explosion-proof note (5) is in a reverse U-shaped structure.

5. The aluminum electrolytic capacitor with a composite anti-explosion pattern according to claim 1, wherein: The insulating layer (4) is made of high-thermal-conductivity rubber film.

6. The aluminum electrolytic capacitor with a composite explosion-proof pattern according to claim 1, characterized in that: The upper end and the lower end of the vice explosion-proof note (5) on the aluminum shell (2) are uniformly pressed to form a pressure relief groove (8), and the pressure relief groove (8) is in an arc-shaped structure.

7. The aluminum electrolytic capacitor with a composite explosion-proof pattern according to claim 6, characterized in that: The insulating layer (4) is in a covering state to the pressure relief groove (8) below, and a cavity is left between the insulating layer (4) and the pressure relief groove (8) above, and a ring-shaped heat dissipation fin (9) is fixedly installed inside the pressure relief groove (8) above.

8. The aluminum electrolytic capacitor with a composite explosion-proof pattern according to claim 7, characterized in that: An air hole (10) in a ring-shaped structure is formed on the insulating layer (4) at the position of the pressure relief groove (8) above.

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