CN214848226U - Lead wire type aluminum electrolytic capacitor - Google Patents

Abstract

The utility model provides a lead wire type aluminum electrolytic capacitor, this condenser includes: the core is arranged in the shell and is soaked in electrolyte in the shell, and the electrolyte of the electrolyte adopts nanoscale long carbon chain branched chain type organic ammonium salt. Based on the technical scheme of the utility model, the upper limit of the capacitor use temperature range is improved, and the stability of the capacitor is improved; and then make aluminium electrolytic capacitor have stronger high temperature resistance, the performance is more stable, when using in the high temperature service environment in the power field, have reliable performance and longer life.

Description

Lead wire type aluminum electrolytic capacitor

Technical Field

The utility model relates to the technical field of capacitors, in particular to a lead type aluminum electrolytic capacitor.

Background

The lead type aluminum electrolytic capacitor is used as a common component on an electronic circuit of electrical equipment and plays electrical roles of filtering, bypassing, coupling, decoupling, phase inversion and the like. The upper limit of the service temperature of the conventional lead type aluminum electrolytic capacitor product is generally about 105 ℃, and the limitation of the temperature causes the practical use of the capacitor to have certain limitation. In power supply equipment, the service temperature of the capacitor often exceeds 105 ℃, and when the conventional lead type aluminum electrolytic capacitor is applied to the field of power supply equipment, faults are easily caused due to overhigh temperature, and the service life is short.

Therefore, in view of the field of power supply equipment, a capacitor capable of adapting to higher temperature needs to be provided, so that in the high-temperature environment of the power supply equipment, the capacitor can ensure the effectiveness and the service life of the function, and further avoid premature failure of the power supply due to the problem of the capacitor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the application provides a lead type aluminum electrolytic capacitor, which increases the upper limit of the use temperature range of the capacitor from 105 ℃ to 125 ℃, and improves the reliability of the capacitor in use in a high-temperature environment.

The utility model discloses a lead wire formula aluminum electrolytic capacitor, include:

a housing;

the core is arranged in the shell and is soaked in electrolyte in the shell, and the electrolyte of the electrolyte adopts nanoscale long carbon chain branched chain type organic ammonium salt.

In one embodiment, the core comprises an anode aluminum foil, a cathode aluminum foil, and an electrolytic paper; the anode aluminum foil is a multi-stage frequency conversion corrosion aluminum foil which is annealed in the optical foil stage, the annealing temperature is 400-500 ℃, and the cathode aluminum foil is a formed aluminum foil. By the embodiment, the annealing treatment process is added to the anode aluminum foil at the optical foil stage, the annealing temperature reaches 400-500 ℃, the precipitation of internal impurities is facilitated, and the reduction of impurities is facilitated to ensure the corrosion speed of the aluminum foil, so that the electrostatic capacity of the capacitor is ensured.

In one embodiment, the electrolytic paper has a thickness of 40 to 50 μm and a density of 40 to 55g/cm³It is made up by adopting double-layer cylinder mould composite papermaking process. Through this embodiment, the electrolytic paper adopts double-deck mould compound papermaking to make, and thickness, density all increase for the withstand voltage ability after the stack promotes, can reduce the angle of loss, the self heating and Equivalent Series Resistance (ESR) of condenser simultaneously.

In one embodiment, the anode aluminum foil and the cathode aluminum foil are led out with lead wires, the lead wires are low-voltage formation guide pins, and the formation voltage of the low-voltage formation guide pins is not less than 140V.

In one embodiment, the shell is a tubular structure with one closed end and an open end, the open end is provided with a sealing rubber plug, and the sealing rubber plug is made of butyl rubber polymer. Through this embodiment, the inside relative leakproofness of condenser is guaranteed to the sealed plug, keeps apart the influence of external to the condenser.

In one embodiment, the butyl rubber content of the butyl rubber polymer is not less than 30%. Through this embodiment, further strengthen the stability of sealed plug to promote the reliability of condenser.

In one embodiment, the portions of the housing adjacent to the opening are each recessed circumferentially inward to form an annular waisted portion. Through this embodiment, the beam waist reduces the internal diameter of the shell that is close to the opening part to this forms limit structure, is used for guaranteeing the relatively fixed of each part position in the shell inside, guarantees the stability of capacitor structure.

In one embodiment, the outer portion of the housing is further sleeved with an insulating sleeve. With this embodiment, the bushing has two main functions: firstly, products are marked, such as trademarks, capacities, voltages, models, temperatures, polarities and the like; and secondly, the insulation function is realized, and the short circuit, the static electricity and the like of the polar shell are prevented.

In one embodiment, the electrolytic paper comprises a first electrolytic paper and a second electrolytic paper, and the anode aluminum foil, the first electrolytic paper, the cathode aluminum foil and the second electrolytic paper are sequentially overlapped to form the core.

In one embodiment, the core is wound in a cylindrical shape inside the housing.

The above-mentioned technical characteristics can be combined in various suitable ways or replaced by equivalent technical characteristics as long as the purpose of the invention can be achieved.

Compared with the prior art, the lead type aluminum electrolytic capacitor provided by the utility model has the following beneficial effects:

the utility model discloses a lead wire type aluminum electrolytic capacitor, through the electrolyte of the capacitor, the aluminium foil and the electrolytic paper of the core and the leading-out guide pin of the core, the upper limit of the capacitor use temperature range is improved, and the stability of the capacitor is improved; and then make aluminium electrolytic capacitor have stronger high temperature resistance, the performance is more stable, when using in the high temperature service environment in the power field, have reliable performance and longer life.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 shows a cross-sectional view of the overall structure of the capacitor of the present invention;

fig. 2 shows a schematic structural view of the core of the capacitor of the present invention in an unfolded state.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

Reference numerals:

1-shell, 11-waist, 2-core, 21-anode aluminum foil, 22-cathode aluminum foil, 23-electrolytic paper, 231-first electrolytic paper, 232-second electrolytic paper, 3-outgoing line, 4-sealing rubber plug and 5-sleeve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model provides a lead wire type aluminum electrolytic capacitor, include:

a housing 1;

the core 2 is arranged in the shell 1, and the core 2 is soaked in the electrolyte in the shell 1, wherein the electrolyte of the electrolyte adopts nano-scale long carbon chain branched chain type organic ammonium salt.

In particular, in the field of capacitors, the limitation of the use temperature of the capacitor is actually mainly due to the limitation of the use temperature of the electrolyte, so that improving the stability of the electrolyte of the capacitor in a high-temperature environment is one of the most effective means for enhancing the high-temperature resistance of the capacitor.

The nanometer long carbon chain branched organic ammonium salt is used as the electrolyte of the electrolyte, the temperature upper limit for keeping stability can reach 125-130 ℃ or even higher, and further the use temperature upper limit of the capacitor can be improved.

Preferably, an insulating sleeve 5 is further sleeved outside the housing 1.

Specifically, the sleeve has two main functions: firstly, products are marked, such as trademarks, capacities, voltages, models, temperatures, polarities and the like; and secondly, the insulation function is realized, and the short circuit, the static electricity and the like of the polar shell are prevented. The casing is sleeved with a sleeve which is generally used as the last process of the manufacturing part in the production process of the capacitor. After the sleeve is sleeved, the capacitor is aged, and after sorting testing, a good product is selected as a qualified product.

In one embodiment, the core 2 comprises an anode aluminum foil 21, a cathode aluminum foil 22, and an electrolytic paper 23; wherein, the anode aluminum foil 21 is a multi-stage frequency conversion corrosion aluminum foil which is annealed at the optical foil stage, the annealing temperature is 400-500 ℃, and the cathode aluminum foil 22 is a formed aluminum foil.

Specifically, the annealing treatment process is added to the anode aluminum foil in the optical foil stage, the annealing temperature reaches 400-500 ℃, the precipitation of internal impurities is facilitated, and the reduction of impurities is beneficial to ensuring the corrosion speed of the aluminum foil, so that the electrostatic capacity of the capacitor is ensured.

In one embodiment, the electrolytic paper 23 has a thickness of 40 to 50 μm and a density of 40 to 55g/cm³It is made up by adopting double-layer cylinder mould composite papermaking process.

Specifically, the electrolytic paper is manufactured by double-layer rotary screen composite papermaking, the thickness and the density are increased, the voltage resistance after superposition is improved, and meanwhile, the loss angle, the self-heating and the Equivalent Series Resistance (ESR) of the capacitor can be reduced.

In one embodiment, the lead wires 3 are led out from both the anode aluminum foil 21 and the cathode aluminum foil 22, the lead wires 3 are low voltage formation guide pins, and the formation voltage of the low voltage formation guide pins is not less than 140V.

In one embodiment, the shell 1 is a tubular structure with one closed end and an open end, a sealing rubber plug 4 is arranged at the open end, and the sealing rubber plug 4 is made of butyl rubber polymer.

Preferably, the butyl rubber content of the butyl rubber polymer is not less than 30%.

In particular, in order to enhance the stability of the sealing rubber plug and thus improve the reliability of the capacitor, the sealing rubber plug made of the corresponding butyl rubber polymer needs to be tested. The sealing rubber plug is placed in an environment at 125 ℃, the hardness of the sealing rubber plug is tested after the sealing rubber plug is placed for 72 hours, and the hardness variation of the sealing rubber plug before and after the test is not more than 5 percent, so that the requirement is met.

In one embodiment, the portions of the housing 1 near the opening are all recessed inward in the circumferential direction to form a ring-shaped corset portion 11.

Specifically, beam waist portion is formed along the circumference extrusion of shell through beam waist device in the production process of condenser, and its aim at reduces the internal diameter of the shell that is close to the opening part to this forms limit structure, is used for guaranteeing the relatively fixed of each part position of shell inside, guarantees the stability of condenser structure.

In one embodiment, the electrolytic paper 23 comprises a first electrolytic paper 231 and a second electrolytic paper 232, and the anode aluminum foil 21, the first electrolytic paper 231, the cathode aluminum foil 22 and the second electrolytic paper 232 are sequentially overlapped to form the core 2.

In one embodiment, the core 2 is wound in a cylindrical shape inside the housing 1.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, 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 therefore, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (8)

1. A leaded aluminum electrolytic capacitor, comprising:

a housing;

the core is arranged in the shell and is soaked in electrolyte in the shell, the electrolyte of the electrolyte adopts nanoscale long carbon chain branched chain type organic ammonium salt, and the core comprises an anode aluminum foil, a cathode aluminum foil and electrolytic paper;

the anode aluminum foil is a multi-stage variable frequency corrosion aluminum foil which is annealed in the foil polishing stage, and the cathode aluminum foil is a formed aluminum foil.

2. The leaded aluminum electrolytic capacitor of claim 1, wherein the electrolytic paper has a thickness of 40-50 μm and a density of 40-55g/cm³It is made up by adopting double-layer cylinder mould composite papermaking process.

3. The leaded aluminum electrolytic capacitor of claim 2, wherein the anode aluminum foil and the cathode aluminum foil are led out with lead wires, the lead wires are low voltage formation guide pins, and the formation voltage of the low voltage formation guide pins is not less than 140V.

4. The leaded aluminum electrolytic capacitor of claim 1, wherein the housing is a tubular structure with one end closed and the other end provided with an opening, the opening is provided with a sealing rubber plug, and the sealing rubber plug is made of butyl rubber polymer.

5. The leaded aluminum electrolytic capacitor of claim 4, wherein the portions of the case proximate the opening are each recessed circumferentially to form a toroidal pinch portion.

6. The leaded aluminum electrolytic capacitor of claim 1 further comprising an insulative sleeve surrounding the outer housing.

7. The leaded aluminum electrolytic capacitor of claim 1, wherein the electrolytic paper comprises a first electrolytic paper and a second electrolytic paper, and the anode aluminum foil, the first electrolytic paper, the cathode aluminum foil and the second electrolytic paper are sequentially overlapped to form the core.

8. The leaded aluminum electrolytic capacitor of claim 1 or 7, wherein the core is wound in a cylindrical shape inside the case.

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