CN115719678A - Manufacturing method of high-temperature-resistant lead type aluminum electrolytic capacitor and electrolytic capacitor - Google Patents
Manufacturing method of high-temperature-resistant lead type aluminum electrolytic capacitor and electrolytic capacitor Download PDFInfo
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Abstract
The invention relates to the technical field of capacitors, in particular to a manufacturing method of a high-temperature-resistant lead type aluminum electrolytic capacitor and the electrolytic capacitor. The manufacturing method comprises the following steps of S1, connecting an anode aluminum foil with an anode guide pin, connecting a cathode aluminum foil with a cathode guide pin, wherein the formation voltage of the anode aluminum foil is more than 1.45 times of the working voltage, and the cathode aluminum foil is selected as a cathode with a voltage more than 1V; isolating the anode aluminum foil and the cathode aluminum foil by using electrolytic paper and winding the anode aluminum foil and the cathode aluminum foil into a core; s2, placing the core at 75-85 ℃ and baking for 50-70 min; s3, dipping the core in electrolyte for impregnation treatment, penetrating the dipped core with a rubber plug, and then putting the dipped core into an aluminum shell for sealing, wherein the time of exposing the dipped core to the air is less than 60min before sealing, and the manufacturing method of the high-temperature-resistant lead-wire type aluminum electrolytic capacitor can obtain the lead-wire type aluminum electrolytic capacitor resistant to the high temperature of 135 ℃, and has the advantage of high-temperature-resistant stability.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to a manufacturing method of a high-temperature-resistant lead type aluminum electrolytic capacitor and the lead type aluminum electrolytic capacitor.
Background
The lead type aluminum electrolytic capacitor is used as a common device on an electronic circuit, plays electric roles of filtering, bypassing, coupling, decoupling, phase inversion and the like, and the conventional temperature product is 85-125 ℃. The temperature product has certain limitation in the actual use process, so that the upper limit working temperature of the capacitor has higher requirement in the field of the existing explosion new energy automobile, and the electrolytic capacitor applied to the automobile engine control device has higher reliability and higher heat resistance, so that the electrolytic capacitor with the upper limit of 125 ℃ cannot meet the requirement. With the rapid development of new energy automobiles, the market prospect of the application of the ultra-high-temperature 135 ℃ electrolytic capacitor is gradually expanded, but the high-temperature resistance of the existing electrolytic capacitor cannot reach 135 ℃, so that the internal heating is serious, the sealing performance is poor, the volatilization of electrolyte is rapid, and finally, the product fails in a short time.
Disclosure of Invention
One of the purposes of the invention is to provide a manufacturing method of a high-temperature-resistant lead type aluminum electrolytic capacitor, which can avoid the defects in the prior art, and can obtain the lead type aluminum electrolytic capacitor resistant to the high temperature of 135 ℃, and the lead type aluminum electrolytic capacitor has the advantage of high-temperature resistance and high stability.
The second purpose of the invention is to provide a lead type aluminum electrolytic capacitor.
In order to achieve one of the above purposes, the invention provides the following technical scheme:
provides a manufacturing method of a high-temperature resistant lead type aluminum electrolytic capacitor, which comprises the following steps,
s1, connecting an anode aluminum foil with an anode guide pin, and connecting a cathode aluminum foil with a cathode guide pin, wherein the formation voltage of the anode aluminum foil is more than 1.45 times of the working voltage, and the cathode aluminum foil is provided with a cathode aluminum foil with a voltage more than 1V; isolating the anode aluminum foil and the cathode aluminum foil by using electrolytic paper and winding the anode aluminum foil and the cathode aluminum foil into a core;
s2, placing the core at 75-85 ℃ and baking for 50-70 min;
and S3, dipping the core in electrolyte for impregnation treatment, penetrating the dipped core with a rubber plug, and then putting the dipped core into an aluminum shell for sealing, wherein the time for exposing the dipped core to the air is less than 60min before sealing.
In some embodiments, in step S3, the vacuum degree of the impregnation treatment is set to be less than or equal to-0.06 MPa, and the impregnation time is greater than or equal to 60min.
In some embodiments, the cathode aluminum foil has a larger area than the anode aluminum foil, and the cathode aluminum foil covers the anode aluminum foil.
In some embodiments, the copper content of the cathode aluminum foil is less than or equal to 1.0mg/m 2 。
In some embodiments, the electrolytic paper comprises at least two fibers, the electrolytic paper has a thickness of 40 to 50 μm and a density of 40 to 55g/cm 3 。
In some embodiments, the electrolytic paper is manufactured by double-layer cylinder compound papermaking.
In some embodiments, the electrolyte is a GBL system electrolyte, the conductivity of the GBL system electrolyte is 11-15 ms/cm at 30 ℃, the pH value is 4-6, and the sparking voltage is more than or equal to 55V.
In some embodiments, the rubber plug is comprised of butyl rubber, kaolin, and a vulcanized resin.
In some embodiments, the butyl rubber is 30% to 50% by weight.
The manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor has the beneficial effects that:
(1) The manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor ensures that the formation voltage of the anode aluminum foil is more than 1.45 times of the working voltage, the cathode aluminum foil is provided with the cathode aluminum foil with the voltage more than 1V, and the formation voltage and the cathode ensure the temperature resistance of the electrolytic capacitor, so that the electrolytic capacitor can bear 135 ℃, and the manufacturing cost is also reduced to the maximum extent.
(2) The manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor comprises the steps of placing the core at 75-85 ℃ and baking for 50-70 min, drying excessive moisture in the core, and preventing the moisture from damaging the temperature resistance of the electrolytic capacitor, so that the electrolytic capacitor can resist 135 ℃.
(3) According to the manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor, the dipped core is exposed to the air for less than 60min before being sealed, the process is controlled to be finished within 1 hour, and the electrolyte is prevented from absorbing moisture in the air, so that the temperature resistance of the electrolytic capacitor is finally influenced.
In order to achieve the second purpose, the invention provides the following technical scheme:
the lead type aluminum electrolytic capacitor is manufactured by the manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor.
The lead type aluminum electrolytic capacitor has the beneficial effects that:
the lead type aluminum electrolytic capacitor can resist the high temperature of 135 ℃, has high temperature resistance and stability, and is suitable for large-scale production and application.
Drawings
Fig. 1 is a structural diagram of a capacitor product according to an embodiment.
FIG. 2 is a schematic diagram of the capacitor core of the embodiment.
Reference numerals
An anode aluminum foil 1; an anode guide pin 2; a cathode aluminum foil 3; a cathode guide pin 4; a rubber plug 5; an aluminum case 6; a core 7; a sleeve 8; electrolytic paper 9.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that, although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1
With the rapid development of new energy automobiles, the market prospect of the application of the ultra-high temperature 135 ℃ electrolytic capacitor is gradually expanded, but the high temperature resistance of the existing electrolytic capacitor can not reach 135 ℃, so that the internal heating is serious, the sealing performance is poor, the electrolyte is volatilized quickly, and finally the product fails in a short time.
The method for manufacturing the high temperature resistant lead type aluminum electrolytic capacitor disclosed in this embodiment, as shown in fig. 1-2, includes the following steps,
s1, connecting an anode aluminum foil 1 with an anode guide pin 2, connecting a cathode aluminum foil 3 with a cathode guide pin 4, wherein the formation voltage of the anode aluminum foil 1 is 1.45 times of the working voltage, and the cathode aluminum foil 3 is provided with a cathode aluminum foil with the voltage more than 1V; separating the anode aluminum foil 1 and the cathode aluminum foil 3 by using electrolytic paper 9 and winding the anode aluminum foil 1 and the cathode aluminum foil 3 into a core 7;
s2, placing the core 7 at 75 ℃ and baking for 50min;
s3, dipping the core 7 in electrolyte for impregnation treatment, putting the dipped core 7 on a rubber plug 5, and then putting the core 7 into an aluminum shell 6 for sealing, wherein the time of exposing the core 7 to the air is less than 60min before sealing the dipped core 7.
In step S1, the anode guide pin 2 is connected to the anode aluminum foil 1 and the cathode aluminum foil 3 is connected to the cathode guide pin 4 through the riveting part of the riveting winder. The anode aluminum foil 1 is made by obtaining a corrosion foil with required specific volume by multi-stage frequency conversion corrosion of a high-purity aluminum foil and growing an oxidation film after the corrosion foil is formed. The cathode aluminum foil 3 is made by obtaining a corrosion foil with a required specific volume by using a light foil in a corrosion mode, and growing an oxide film after the corrosion foil is formed.
After the step S3, a layer of sleeve 8 is further sleeved on the outer surface of the semi-finished product obtained in the step S3, and the sleeve 8 can be used for identification and insulation. And then, carrying out high-temperature pressure aging on the sealed capacitor, carrying out sorting parameter measurement on the aged capacitor, and packaging the qualified product.
The manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor ensures that the formation voltage of the anode aluminum foil 1 is more than 1.45 times of the working voltage, the cathode aluminum foil 3 adopts the negative electrode with the voltage more than 1V, the formation voltage and the negative electrode ensure the temperature resistance of the electrolytic capacitor, simultaneously, the manufacturing cost is reduced to the maximum extent, and simultaneously, the withstand voltage of the aluminum foil can be properly improved according to the electrolytic capacitors with different specifications to obtain proper specific volume for design. And (3) baking the core 7 at 75-85 ℃ for 50-70 min to dry excess moisture in the core 7 and prevent the moisture from damaging the temperature resistance of the electrolytic capacitor. The time for exposing the core 7 to the air is less than 60min before the impregnated core 7 is closed, and the process is controlled within 1 hour, so that the electrolyte is prevented from absorbing moisture in the air, and the temperature resistance of the electrolytic capacitor is finally influenced.
In this embodiment, in step S3, the vacuum degree of the impregnation treatment is set to-0.06 MPa, and the impregnation time is 60min, which is beneficial to improving the impregnation treatment effect.
In this embodiment, the area of the cathode aluminum foil 3 is larger than that of the anode aluminum foil 1, the cathode aluminum foil 3 covers the anode aluminum foil 1, so that the cathode foil covers the anode foil,
in this embodiment, the copper content of the cathode aluminum foil 3 is 1.0mg/m 2 。
The copper content of the cathode aluminum foil 3 is 1.0mg/m 2 Low copper content reduces the capacity of electrolytic capacitors for high temperature durability lifeThe attenuation ratio is measured, and the high temperature resistance stability is improved.
In this embodiment, the electrolytic paper 9 contains at least two kinds of fibers, and the electrolytic paper 9 has a thickness of 40 μm and a density of 40g/cm 3 . The electrolytic paper 9 contains at least two kinds of fibers, so that the liquid absorption performance is improved, the impregnation treatment is improved, the temperature resistance of the electrolytic capacitor is improved, the thickness and the density of the electrolytic paper 9 are limited, and the liquid absorption performance of the electrolytic paper 9 is further improved.
In this embodiment, the electrolytic paper 9 is manufactured by double-layer cylinder compound papermaking. The double-layer cylinder mould compounding improves the liquid absorption of the electrolytic paper 9.
In the embodiment, the electrolyte is GBL system electrolyte, the conductivity of the electrolyte is 11ms/cm at 30 ℃, the pH value is 4, and the sparking voltage is 55V. Because the conductivity and the pH value influence the loss and ESR of the electrolytic capacitor, the sparking voltage determines the stability of the capacitor in the working process, the GBL system electrolyte is a high-temperature-resistant electrolyte, the conductivity of the GBL system electrolyte is controlled to be 11ms/cm at 30 ℃, the pH value is controlled to be 4, the sparking voltage is controlled to be 55V, and the temperature resistance of the electrolytic capacitor is improved.
In this embodiment, the rubber plug 5 is composed of butyl rubber, kaolin and vulcanized resin, and the weight percentage of the butyl rubber is 30%. The butyl rubber is high-temperature resistant resin, kaolin and vulcanized resin are added to increase the temperature resistance, so that the hardness variation of the rubber plug 5 is not more than 5% after the rubber plug is placed for 72 hours in an environment of 135 ℃.
Example 2
There is provided a method for manufacturing a high temperature resistant lead type aluminum electrolytic capacitor, as shown in fig. 1-2, comprising the following steps,
s1, connecting an anode aluminum foil 1 with an anode guide pin 2, connecting a cathode aluminum foil 3 with a cathode guide pin 4, wherein the formation voltage of the anode aluminum foil 1 is 1.5 times of the working voltage, and the cathode aluminum foil 3 is selected from the negative pole of 1.1V voltage; separating the anode aluminum foil 1 and the cathode aluminum foil 3 by using electrolytic paper 9 and winding the anode aluminum foil 1 and the cathode aluminum foil 3 into a core 7;
s2, placing the core 7 at 80 ℃ and baking for 60min;
s3, dipping the core 7 in electrolyte for impregnation treatment, putting the dipped core 7 on a rubber plug 5, and then putting the core 7 into an aluminum shell 6 for sealing, wherein the time of exposing the core 7 to the air is less than 60min before sealing the dipped core 7.
In step S1, the anode guide pin 2 is connected to the anode aluminum foil 1 and the cathode aluminum foil 3 is connected to the cathode guide pin 4 through the riveting part of the riveting winder. The anode aluminum foil 1 is made by obtaining a corrosion foil with required specific volume by multi-stage frequency conversion corrosion of a high-purity aluminum foil and growing an oxidation film after the corrosion foil is formed. The cathode aluminum foil 3 is made by etching a main plain foil to obtain an etched foil with a required specific volume, and growing an oxide film after the etched foil is formed.
After the step S3, a layer of sleeve 8 is further sleeved on the outer surface of the semi-finished product obtained in the step S3, and the sleeve 8 can be used for identification and insulation. And then, carrying out high-temperature pressure aging on the sealed capacitor, carrying out sorting parameter measurement on the aged capacitor, and packaging the qualified product.
The manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor ensures that the formation voltage of the anode aluminum foil 1 is more than 1.45 times of the working voltage, the cathode aluminum foil 3 adopts the negative electrode with the voltage more than 1V, the formation voltage and the negative electrode ensure the temperature resistance of the electrolytic capacitor, and simultaneously, the manufacturing cost is reduced to the maximum extent. And (3) baking the core 7 at 75-85 ℃ for 50-70 min to prevent moisture from damaging the temperature resistance of the electrolytic capacitor. The time of exposing the core 7 to the air is less than 60min before the impregnated core 7 is closed, and the process is controlled to be finished within 1 hour, so that the electrolyte is prevented from absorbing moisture in the air, and the temperature resistance of the electrolytic capacitor is finally influenced.
In this embodiment, in step S3, the vacuum degree of the impregnation treatment is set to-0.07 MPa, and the impregnation time is 70min, which is beneficial to improving the effect of the impregnation treatment.
In this embodiment, the area of the cathode aluminum foil 3 is larger than that of the anode aluminum foil 1, the cathode aluminum foil 3 covers the anode aluminum foil 1, so that the cathode foil covers the anode foil,
in this embodiment, the copper content of the cathode aluminum foil 3 is 0.5mg/m 2 。
The copper content of the cathode aluminum foil 3 is less than or equal to 1.0mg/m 2 Low copper content reduced electrolytic capacitor life at high temperatureThe capacity attenuation proportion improves the high temperature resistance stability.
In this embodiment, the electrolytic paper 9 contains at least two kinds of fibers, and the electrolytic paper 9 has a thickness of 45 μm and a density of 50g/cm 3 . The electrolytic paper 9 containing at least two kinds of fibers can improve the liquid absorption performance, improve the impregnation treatment, facilitate the improvement of the temperature resistance of the electrolytic capacitor, limit the thickness and the density of the electrolytic paper 9 and further improve the liquid absorption performance of the electrolytic paper 9.
In this embodiment, the electrolytic paper 9 is manufactured by double-layer cylinder compound papermaking. The double-layer cylinder mould compounding improves the liquid absorption of the electrolytic paper 9.
In the embodiment, the electrolyte is GBL system electrolyte, the conductivity of the electrolyte is 12ms/cm at 30 ℃, the pH value is 5, and the sparking voltage is 605V. The loss and ESR of the electrolytic capacitor are influenced by the conductivity and the pH value, the stability of the capacitor in the working process is determined by the sparking voltage, the GBL system electrolyte is a high-temperature-resistant electrolyte, the conductivity of the GBL system electrolyte is controlled to be 11-15 ms/cm at 30 ℃, the pH value is controlled to be 4-6, the sparking voltage is not less than 55V, and the temperature resistance of the electrolytic capacitor is improved.
In this embodiment, the rubber plug 5 is composed of butyl rubber, kaolin and vulcanized resin, and the weight percentage of the butyl rubber is 40%. The butyl rubber is high-temperature resistant resin, and kaolin and vulcanized resin are added to increase the temperature resistance, so that the hardness variation of the rubber plug 5 is not more than 5% after the rubber plug is placed for 72 hours in an environment of 135 ℃.
Example 3
There is provided a method for manufacturing a high temperature resistant lead type aluminum electrolytic capacitor, as shown in fig. 1-2, comprising the following steps,
s1, connecting an anode aluminum foil 1 with an anode guide pin 2, connecting a cathode aluminum foil 3 with a cathode guide pin 4, wherein the formation voltage of the anode aluminum foil 1 is 1.6 times of the working voltage, and the cathode aluminum foil 3 adopts a negative electrode with 1.8V voltage; separating the anode aluminum foil 1 and the cathode aluminum foil 3 by using electrolytic paper 9 and winding the anode aluminum foil 1 and the cathode aluminum foil 3 into a core 7;
s2, placing the core 7 at 85 ℃ and baking for 70min;
and S3, dipping the core 7 in electrolyte for impregnation treatment, threading the dipped core 7 with a rubber plug 5, and then putting the dipped core 7 into an aluminum shell 6 for sealing, wherein the time for exposing the core 7 to the air is less than 60min before the dipped core 7 is sealed.
In step S1, the anode guide pin 2 is connected to the anode aluminum foil 1 and the cathode aluminum foil 3 is connected to the cathode guide pin 4 through the riveting part of the riveting winder. The anode aluminum foil 1 is made by obtaining a corrosion foil with required specific volume by multi-stage frequency conversion corrosion of a high-purity aluminum foil and growing an oxidation film after the corrosion foil is formed. The cathode aluminum foil 3 is prepared by obtaining a corrosion foil with required specific volume by corrosion of a main smooth foil, and growing an oxide film after the corrosion foil is formed.
After the step S3, a layer of sleeve 8 is sleeved on the outer surface of the semi-finished product obtained in the step S3, and the sleeve 8 can be used for identification and insulation. And then, carrying out high-temperature pressure aging on the sealed capacitor, carrying out sorting parameter measurement on the aged capacitor, and packaging the qualified product.
The manufacturing method of the high-temperature-resistant lead type aluminum electrolytic capacitor ensures that the formation voltage of the anode aluminum foil 1 is more than 1.45 times of the working voltage, the cathode aluminum foil 3 adopts the negative electrode with the voltage more than 1V, the formation voltage and the negative electrode ensure the temperature resistance of the electrolytic capacitor, and simultaneously, the manufacturing cost is reduced to the maximum extent. And (3) baking the core 7 at 75-85 ℃ for 50-70 min to dry excessive moisture in the core 7 and prevent the moisture from damaging the temperature resistance of the electrolytic capacitor. The time of exposing the core 7 to the air is less than 60min before the impregnated core 7 is closed, and the process is controlled to be finished within 1 hour, so that the electrolyte is prevented from absorbing moisture in the air, and the temperature resistance of the electrolytic capacitor is finally influenced.
In this embodiment, in step S3, the vacuum degree of the impregnation treatment is set to-0.08 MPa, and the impregnation time is 65min, which is beneficial to improving the effect of the impregnation treatment.
In this embodiment, the area of the cathode aluminum foil 3 is larger than that of the anode aluminum foil 1, the cathode aluminum foil 3 covers the anode aluminum foil 1, so that the cathode foil covers the anode foil,
in this embodiment, the copper content of the cathode aluminum foil 3 is 0.8mg/m 2 。
The copper content of the cathode aluminum foil 3 is less than or equal to 1.0mg/m 2 Low copper contentThe capacity attenuation proportion of the electrolytic capacitor in the high-temperature durability life is reduced, and the high-temperature resistance stability is improved.
In this embodiment, the electrolytic paper 9 contains at least two kinds of fibers, and the electrolytic paper 9 has a thickness of 50 μm and a density of 55g/cm 3 . The electrolytic paper 9 containing at least two kinds of fibers can improve the liquid absorption performance, improve the impregnation treatment, facilitate the improvement of the temperature resistance of the electrolytic capacitor, limit the thickness and the density of the electrolytic paper 9 and further improve the liquid absorption performance of the electrolytic paper 9.
In this embodiment, the electrolytic paper 9 is manufactured by double-layer cylinder compound papermaking. The double-layer cylinder mould compounding improves the liquid absorption of the electrolytic paper 9.
In the embodiment, the electrolyte is GBL system electrolyte, the conductivity of the electrolyte is 15ms/cm at 30 ℃, the pH value is 6, and the sparking voltage is 70V. The loss and ESR of the electrolytic capacitor are influenced by the conductivity and the pH value, the stability of the capacitor in the working process is determined by the sparking voltage, the GBL system electrolyte is a high-temperature-resistant electrolyte, the conductivity of the GBL system electrolyte is controlled to be 11-15 ms/cm at 30 ℃, the pH value is controlled to be 4-6, the sparking voltage is not less than 55V, and the temperature resistance of the electrolytic capacitor is improved.
In this embodiment, the rubber plug 5 is composed of butyl rubber, kaolin and vulcanized resin, and the weight percentage of the butyl rubber is 30% to 50%. The butyl rubber is high-temperature resistant resin, and kaolin and vulcanized resin are added to increase the temperature resistance, so that the hardness variation of the rubber plug 5 is not more than 5% after the rubber plug is placed for 72 hours in an environment of 135 ℃.
Performance testing
Comparative example 1: in other material consistencies, this comparative example 1 differs from example 1 in that the anode foiling voltage is 1.32 times the operating voltage or 2.5 times the operating voltage, and the product life of example 1 is compared to that of comparative example 1, where the life test is 135 ℃ for 3000 hours, with the parameters given in table 1 below:
TABLE 1
| Formation voltage | Rate of change in volume (%) |
| 1.32 times of working voltage | -34.65％ |
| 1.45 times of working voltage | -16.47％ |
| 2.5 times of working voltage | -10.34％ |
From the experimental results, it can be seen that the capacity after the anode foil formation voltage is insufficient for the product life test is greatly attenuated, the attenuation of the capacity change rate can be greatly reduced if the anode foil formation voltage is 1.45 times of the working voltage, and the attenuation of the capacity change rate can be reduced if the anode foil formation voltage is more than 1.45 times of the working voltage, but the reduction amplitude efficiency is not high.
Comparative example 2: in the case of other materials being identical, this comparative example 1 differs from example 1 in that: the life test of the common-purity cathode foil and the high-purity aluminum foil with low copper content is compared, the life test temperature is 135 ℃, and the parameters are shown in the following table 2:
TABLE 2
From the experimental results, it can be seen that the service life of the electrolytic capacitor can be prolonged by more than 1000 hours by using the high-purity aluminum foil with low copper content.
Comparative example 3: in the case of other materials being identical, this comparative example 1 differs from example 1 in that: IIR butyl rubber with the temperature resistance of 135-150 ℃ and ordinary IIR butyl rubber with the temperature resistance of below 125 ℃ are used for carrying out upper limit temperature 135 ℃ life test comparison, and the test conditions are shown in Table 3
TABLE 3
The experimental result shows that the butyl rubber with the temperature resistance below 125 ℃ can not meet the design requirement of the product, and the butyl rubber with the temperature resistance of 135-150 ℃ needs to be selected.
Comparative example 4: in the case of other materials being identical, this comparative example 1 differs from example 1 in that: a casing pipe with the temperature resistance of more than or equal to 135 ℃ and the conventional performance is used for carrying out a comparative test in a high-temperature environment of 135 ℃, and the test conditions are shown in the following table 4:
TABLE 4
The experimental result shows that the pipe sleeve with the temperature resistance lower than 135 ℃ can not meet the design requirement of the product, and the service life of the electrolytic capacitor can be influenced.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, so that the scope of the present application is not to be construed as being limited.
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.
Claims (10)
1. A method for manufacturing a high-temperature-resistant lead type aluminum electrolytic capacitor is characterized by comprising the following steps: comprises the following steps of (a) preparing a solution,
s1, connecting an anode aluminum foil (1) with an anode guide pin (2), connecting a cathode aluminum foil (3) with a cathode guide pin (4), wherein the formation voltage of the anode aluminum foil (1) is more than 1.45 times of the working voltage, and the cathode aluminum foil (3) is provided with a cathode aluminum foil with a voltage more than 1V; separating the anode aluminum foil (1) and the cathode aluminum foil (3) by using electrolytic paper (9) and winding the anode aluminum foil and the cathode aluminum foil into a core (7);
s2, placing the core (7) at 75-85 ℃ and baking for 50-70 min;
s3, dipping the core (7) in electrolyte for impregnation treatment, putting the dipped core (7) on a rubber plug (5), and then putting the dipped core (7) in an aluminum shell (6) for sealing, wherein the time for exposing the core (7) to the air is less than 60min before sealing the dipped core (7).
2. The method for manufacturing a high-temperature-resistant lead-type aluminum electrolytic capacitor as recited in claim 1, wherein: in the step S3, the vacuum degree of the impregnation treatment is set to be less than or equal to-0.06 MPa, and the impregnation time is set to be more than or equal to 60min.
3. The method for manufacturing a high temperature resistant leaded aluminum electrolytic capacitor as recited in claim 1, wherein: the area of negative pole aluminium foil (3) is than the area of positive pole aluminium foil (1) is big, negative pole aluminium foil (3) cladding positive pole aluminium foil (1).
4. The method for manufacturing a high-temperature-resistant lead-type aluminum electrolytic capacitor as recited in claim 1, wherein: the copper content of the cathode aluminum foil (3) is less than or equal to 1.0mg/m 2 。
5. The method for manufacturing a high temperature resistant leaded aluminum electrolytic capacitor as recited in claim 1, wherein: the electrolytic paper (9) contains at least two fibers, the thickness of the electrolytic paper (9) is 40-50 mu m, and the density is 40-55 g/cm 3 。
6. The method for manufacturing a high-temperature-resistant lead-type aluminum electrolytic capacitor as recited in claim 5, wherein: the electrolytic paper (9) is manufactured by double-layer rotary screen composite papermaking.
7. The method for manufacturing a high temperature resistant leaded aluminum electrolytic capacitor as recited in claim 1, wherein: the electrolyte is GBL system electrolyte, the conductivity of the electrolyte is 11-15 ms/cm at 30 ℃, the pH value is 4-6, and the sparking voltage is more than or equal to 55V.
8. The method for manufacturing a high-temperature-resistant lead-type aluminum electrolytic capacitor as recited in claim 1, wherein: the rubber plug (5) consists of butyl rubber, kaolin and vulcanized resin.
9. The method for manufacturing a high-temperature-resistant lead-type aluminum electrolytic capacitor as recited in claim 8, wherein: the weight percentage of the butyl rubber is 30-50%.
10. A lead type aluminum electrolytic capacitor is characterized in that: the high-temperature-resistant lead-type aluminum electrolytic capacitor is manufactured by the manufacturing method of the high-temperature-resistant lead-type aluminum electrolytic capacitor as claimed in any one of claims 1 to 9.
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| CN202211329739.8A CN115719678A (en) | 2022-10-27 | 2022-10-27 | Manufacturing method of high-temperature-resistant lead type aluminum electrolytic capacitor and electrolytic capacitor |
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| CN202211329739.8A CN115719678A (en) | 2022-10-27 | 2022-10-27 | Manufacturing method of high-temperature-resistant lead type aluminum electrolytic capacitor and electrolytic capacitor |
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