阅读说明：本技术 云母纸电容器及其制备方法 (Mica paper capacitor and preparation method thereof ) 是由 张四清 于 2021-07-06 设计创作，主要内容包括：本发明公开了一种云母纸电容器及其制备方法,包括电容器本体和引线,所述介质包括云母纸和环氧树脂,所述电容器本体包括极板和介质,所述极板至少设于两块,且两块极板有间隙的平行设置,所述云母纸置于两块所述极板的间隙之间,所述环氧树脂表层包覆两块极板,所述引线设有两根,两根引线均伸入介质内部,且每根引线单独连接一块极板。其生产步骤包括备料、卷绕、浸渍、整理和检验。(The invention discloses a mica paper capacitor and a preparation method thereof, and the mica paper capacitor comprises a capacitor body and leads, wherein the medium comprises mica paper and epoxy resin, the capacitor body comprises at least two pole plates and a medium, the two pole plates are arranged in parallel with a gap, the mica paper is arranged between the gap of the two pole plates, the epoxy resin surface layer coats the two pole plates, the two leads are arranged, the two leads both extend into the medium, and each lead is independently connected with one pole plate. The production steps comprise material preparation, winding, impregnation, finishing and inspection.)

1. Mica paper capacitor, its characterized in that: including capacitor body and lead wire, the medium includes mica paper and epoxy, capacitor body includes polar plate and medium, two are located at least to the polar plate, and the gapped parallel arrangement of two polar plates, two are arranged in to the mica paper between the clearance of polar plate, two polar plates of epoxy top layer cladding, the lead wire is equipped with two, and inside two lead wires all stretched into the medium, and every lead wire connects a polar plate alone.

2. The mica paper capacitor of claim 1, wherein: the polar plate is an aluminum foil or a copper foil.

3. The mica paper capacitor of claim 1, wherein: the lead is a copper foil or a copper wire.

4. The mica paper capacitor of claim 1, wherein: the two lead wires are arranged on different sides or on the same side.

5. A method of making the mica paper capacitor of any of claims 1-5, characterized in that: the method comprises the following steps:

(a) cutting and cutting the polar plates and the medium with uniform specifications into specified length, width and thickness according to the technical requirements of a mica paper capacitor of a certain model;

(b) overlapping the cut and cut materials together, and winding the materials in a manual mode to form a capacitor core;

(c) putting the capacitor core into a container, and putting the container into a clean oven for atmospheric drying;

(d) c, putting the capacitor core dried in the step c and the container into a dipping tank of vacuum dipping equipment, filling epoxy resin, covering a dipping tank cover, vacuumizing, and dipping the capacitor core;

(e) carrying out vacuum drying and curing on the impregnated capacitor core to obtain a mica paper capacitor primary finished product;

(f) and (3) carrying out surface treatment on the cured mica paper capacitor, and carrying out index detection on the mica paper capacitor to obtain the finished mica paper capacitor.

6. The method of making a mica paper capacitor of claim 5, wherein: and the atmospheric drying temperature in the step c is 65-75 ℃, and the drying time is 22-26 h.

7. The method of making a mica paper capacitor of claim 5, wherein: in the step d, the epoxy resin is bisphenol A, and the preparation proportion is as follows: 1:1, and the preparation temperature is 65-75 ℃.

8. The method of making a mica paper capacitor of claim 5, wherein: in the step d, the dipping temperature of the capacitor core is 65-75 ℃, the dipping pressure is less than or equal to 20Pa, and the dipping time is 1-3 h.

9. The method of making a mica paper capacitor of claim 5, wherein: the temperature for vacuum drying and curing in the step e is 100-120 ℃, and the time for vacuum drying and curing is 11-13 h.

10. The method of making a mica paper capacitor of claim 5, wherein: and f, detecting the indexes of the mica paper capacitor, namely the physical dimension, the capacitance, the loss value, the insulation resistance and the voltage resistance of the mica paper capacitor.

Technical Field

The invention relates to the technical field of capacitors, in particular to a mica paper capacitor and a preparation method thereof.

Background

The capacitor is a commonly used electronic component, and has a wide application in the electronic industry, and the main functions of the capacitor in the application include coupling, filtering, decoupling, resonance, bypass, neutralization, timing, integration, differentiation, compensation, bootstrap frequency division, load capacitance and the like. The simplest capacitor is formed by two conductors which are close to each other and a layer of non-conductive insulating medium is sandwiched between the two conductors.

With the change of electronic information technology, the update speed of digital electronic products is faster and faster, and the production and sales volume of consumer electronic products such as flat panel televisions (LCDs and PDPs), notebook computers, and digital cameras is continuously increasing, which drives the growth of capacitor industry. However, the conventional capacitor has the defects of overlarge volume, short service life, weak impact resistance and the like, so that the capacitor is frequently replaced, and meanwhile, the capacitor has limitation in application and is weaker in applicability in the field with strict requirement on the weight of accessories.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a mica paper capacitor and a preparation method thereof.

In order to achieve the above purpose, the solution adopted by the invention is as follows: mica paper condenser, including capacitor body and lead wire, the medium includes mica paper and epoxy top layer, capacitor body includes polar plate and medium, two are located at least to the polar plate, and the gapped parallel arrangement of two polar plates, mica paper arranges two between the clearance of polar plate, two polar plates of epoxy top layer cladding, the lead wire is equipped with two, and inside two lead wires all stretched into the medium, and every lead wire connects a polar plate alone.

In one preferred scheme, the polar plate is an aluminum foil or a copper foil.

In one preferred scheme, the lead is a copper foil or a copper wire.

In one preferred scheme, the two lead wires are arranged on different sides or on the same side.

The preparation method of the mica paper capacitor comprises the following steps:

(a) cutting and cutting the polar plates and the medium with uniform specifications into specified length, width and thickness according to the technical requirements of a mica paper capacitor of a certain model;

(b) overlapping the cut and cut materials together, and winding the materials in a manual mode to form a capacitor core;

(c) putting the capacitor core into a container, and putting the container into a clean oven for atmospheric drying;

(d) c, putting the capacitor core dried in the step c and the container into a dipping tank of vacuum dipping equipment, filling epoxy resin, covering a dipping tank cover, vacuumizing, and dipping the capacitor core;

(e) carrying out vacuum drying and curing on the impregnated capacitor core to obtain a mica paper capacitor primary finished product;

(f) and (3) carrying out surface treatment on the cured mica paper capacitor, and carrying out index detection on the mica paper capacitor to obtain the finished mica paper capacitor.

In one preferable scheme, the atmospheric drying temperature in the step c is 65-75 ℃, and the drying time is 22-26 h.

In one preferable scheme, the epoxy resin in the step d is bisphenol a, and the preparation ratio is as follows: 1:1, and the preparation temperature is 65-75 ℃.

In one preferable scheme, the dipping temperature of the capacitor core in the step d is 65-75 ℃, the dipping pressure is less than or equal to 20Pa, and the dipping time is 1-3 h.

In one preferable scheme, the temperature for vacuum drying and curing in the step e is 100-120 ℃, and the time for vacuum drying and curing is 11-13 h.

In one preferable scheme, the indexes detected in the step f are the external dimension, the capacitance, the loss value, the insulation resistance and the voltage resistance of the mica paper capacitor.

The invention has the beneficial effects that: the mica paper capacitor prepared by the invention has the characteristics of small volume, low loss, radiation resistance, vibration impact resistance, high temperature and high pressure resistance and the like, increases the adaptive surface, and has better applicability in the fields of national defense and military industry such as aerospace and the like than the traditional capacitor.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram according to embodiment 3 of the present invention;

FIG. 4 is a schematic cross-sectional structure diagram of the mica paper capacitor of the present invention.

In the figure, 1-capacitor body, 2-plate, 3-medium, 31-mica paper, 32-epoxy resin surface layer and 4-lead.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.

Example 1

Mica paper condenser, including polar plate, medium and lead wire, the polar plate ann in inside the medium, the medium includes mica paper and epoxy top layer, the polar plate chooses for use the copper foil and locates two at least, and two gapped parallel arrangement of polar plate, mica paper arranges two between the clearance of polar plate, two polar plates of epoxy top layer cladding, the copper foil is chooseed for use to the lead wire, and the lead wire is equipped with two, and inside two lead wires all stretched into the medium, and every lead wire connects a polar plate alone, two lead wire heterolaterally sets up.

The preparation method of the mica paper capacitor comprises the following steps:

(a) cutting and cutting the polar plates and the medium with uniform specifications into specified length, width and thickness according to the technical requirements of a mica paper capacitor of a certain model;

(b) overlapping the cut and cut materials together, and winding the materials in a manual mode to form a capacitor core;

(c) putting the assembled capacitor core into a container, and putting the container into a clean oven for atmospheric drying treatment at the atmospheric drying temperature of 65 ℃ for 22 hours;

(d) c, putting the capacitor core dried in the step c and the container into an impregnation tank of vacuum impregnation equipment, filling epoxy resin, covering an impregnation tank cover, vacuumizing, and impregnating the capacitor core, wherein the impregnation temperature is 65 ℃, the impregnation pressure is 16Pa, and the impregnation time is 1 h;

(e) vacuum drying and curing the impregnated capacitor core, wherein the temperature of the vacuum drying and curing is ensured to be 100 ℃, and the time of the vacuum drying and curing is 11 hours, so as to obtain a primary finished product of the mica paper capacitor;

(f) and (3) carrying out surface treatment on the cured mica paper capacitor, carrying out index detection on the mica paper capacitor, and mainly detecting the external dimension, the capacitance, the loss value, the insulation resistance, the voltage-resistant parameter and the like of the mica paper capacitor to obtain the finished mica paper capacitor.

In the step d, the epoxy resin is bisphenol A, and the preparation proportion is as follows: ethyl-1: 1, and formulation temperature 65 ℃.

Example 2

Mica paper condenser, including polar plate, medium and lead wire, the polar plate ann in inside the medium, the medium includes mica paper and epoxy top layer, the aluminium foil is chooseed for use to the polar plate and is located two at least, and the gapped parallel arrangement of two polar plates, mica paper arranges two in between the clearance of polar plate, two polar plates of epoxy top layer cladding, the copper foil is chooseed for use to the lead wire, and the lead wire is equipped with two, and inside two lead wires all stretched into the medium, and every lead wire connects a polar plate alone, two the lead wire homonymy sets up.

The preparation method of the mica paper capacitor comprises the following steps:

(a) cutting and cutting the polar plates and the medium with uniform specifications into specified length, width and thickness according to the technical requirements of a mica paper capacitor of a certain model;

(b) overlapping the cut and cut materials together, and winding the materials in a manual mode to form a capacitor core;

(c) putting the filled capacitor core into a container, and putting the container into a clean oven for atmospheric drying treatment, wherein the atmospheric drying temperature is 70 ℃, and the drying time is 24 hours;

(d) c, putting the capacitor core dried in the step c and the container into an impregnation tank of vacuum impregnation equipment, filling epoxy resin, covering an impregnation tank cover, vacuumizing, and impregnating the capacitor core, wherein the impregnation temperature is 70 ℃, the impregnation pressure is 20Pa, and the impregnation time is 2 h;

(e) vacuum drying and curing the impregnated capacitor core, wherein the temperature of vacuum drying and curing is ensured to be 110 ℃, and the time of vacuum drying and curing is 12 hours, so as to obtain a mica paper capacitor primary finished product;

(f) and (3) carrying out surface treatment on the cured mica paper capacitor, carrying out index detection on the mica paper capacitor, and mainly detecting the external dimension, the capacitance, the loss value, the insulation resistance, the voltage-resistant parameter and the like of the mica paper capacitor to obtain the finished mica paper capacitor.

In the step d, the epoxy resin is bisphenol A, and the preparation proportion is as follows: ethyl-1: 1, and the formulation temperature was 70 ℃.

Example 3

Mica paper condenser, including polar plate, medium and lead wire, the polar plate ann in inside the medium, the medium includes mica paper and epoxy top layer, the aluminium foil is chooseed for use to the polar plate and is located two at least, and two gapped parallel arrangement of polar plate, mica paper arranges two between the clearance of polar plate, two polar plates of epoxy top layer cladding, the copper wire is chooseed for use to the lead wire, and the lead wire is equipped with two, and inside two lead wires all stretched into the medium, and every lead wire connects a polar plate alone, two lead wire heterolaterally sets up.

The preparation method of the mica paper capacitor comprises the following steps:

(a) cutting and cutting the polar plates and the medium with uniform specifications into specified length, width and thickness according to the technical requirements of a mica paper capacitor of a certain model;

(b) overlapping the cut and cut materials together, and winding the materials in a manual mode to form a capacitor core;

(c) putting the assembled capacitor core into a container, and putting the container into a clean oven for atmospheric drying treatment at the atmospheric drying temperature of 75 ℃ for 26 hours;

(d) c, putting the capacitor core dried in the step c and the container into an impregnation tank of vacuum impregnation equipment, filling epoxy resin, covering an impregnation tank cover, vacuumizing, and impregnating the capacitor core, wherein the impregnation temperature is 75 ℃, the impregnation pressure is 20Pa, and the impregnation time is 3 h;

(e) vacuum drying and curing the impregnated capacitor core, wherein the temperature of vacuum drying and curing is ensured to be 120 ℃, and the time of vacuum drying and curing is 13 hours, so as to obtain a mica paper capacitor primary finished product;

(f) and (3) carrying out surface treatment on the cured mica paper capacitor, carrying out index detection on the mica paper capacitor, and mainly detecting the external dimension, the capacitance, the loss value, the insulation resistance, the voltage-resistant parameter and the like of the mica paper capacitor to obtain the finished mica paper capacitor.

In the step d, the epoxy resin is bisphenol A, and the preparation proportion is as follows: 1:1, and the preparation temperature is 75 ℃.

In the above embodiments, the mica paper used in the present invention is the 521 type mica paper for capacitor disclosed in publication No. CN106049166B (521 type mica paper for capacitor and its preparation method), and the preparation method of the mica paper of the present invention is the most suitable production process for the mica paper, so that the exclusive characteristics of the 521 type mica paper for capacitor can be represented to the maximum extent.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.