阅读说明：本技术 一种铸体阳极电容器电芯的制造方法 (Method for manufacturing cast anode capacitor cell ) 是由 尹志华 李良 尹超 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种铸体阳极电容器电芯的制造方法,包括步骤：S10、将报废铝电解电容的阳极箔、正极箔片和/或废边箔片进行打磨成粉,得到铝箔粉体；S20、将所述了铝箔粉体进行高温提纯处理,得到高纯铝阳极碎片颗粒；S30、将所述高纯铝阳极碎片颗粒进行模压冷焊成型,获得特定规格的电容器电芯。本发明铸体阳极电容器电芯的制作方法利用废弃电容器的阳极箔或者正极箔片残渣作为原料进行生产,降低了生产成本且利于环保。(The invention discloses a method for manufacturing a cast anode capacitor cell, which comprises the following steps: s10, grinding the anode foil, the anode foil and/or the waste edge foil of the scrapped aluminum electrolytic capacitor into powder to obtain aluminum foil powder; s20, carrying out high-temperature purification treatment on the aluminum foil powder to obtain high-purity aluminum anode fragment particles; and S30, performing die pressing cold welding forming on the high-purity aluminum anode scrap particles to obtain the capacitor battery core with a specific specification. The manufacturing method of the cast anode capacitor cell utilizes the anode foil or the anode foil residue of the waste capacitor as a raw material for production, reduces the production cost and is beneficial to environmental protection.)

1. A method of making a cast anode capacitor cell, comprising the steps of:

s10, grinding the anode foil, the anode foil and/or the waste edge foil of the scrapped aluminum electrolytic capacitor into powder to obtain aluminum foil powder;

s20, carrying out high-temperature purification treatment on the aluminum foil powder to obtain high-purity aluminum anode fragment particles;

and S30, performing die pressing cold welding forming on the high-purity aluminum anode scrap particles to obtain the capacitor battery core with a specific specification.

2. The method of making a cast-on-anode capacitor cell of claim 1, wherein: in step S10, pressing the anode foil, the anode foil and/or the scrap foil of the aluminum electrolytic capacitor into an aluminum block, drying the aluminum block, and ball-milling the aluminum block in a ball mill to obtain aluminum foil powder.

3. The method of making a cast-on-anode capacitor cell of claim 1, wherein: in step S10, the anode foil and/or the scrap foil of the aluminum electrolytic capacitor are dried, and then the aluminum foil is crushed in an aluminum foil crusher to obtain aluminum powder.

4. The method of making a cast-on-anode capacitor cell of claim 1, wherein: in step S20, the temperature of the high-temperature purification treatment is 150-400 ℃.

5. The method of making a cast-on-anode capacitor cell of claim 1, wherein: in step S30, the method further includes the steps of: embedding a current collector into the battery core in advance, wherein the purity of the current collector is 99.99-99.995%.

6. The method of making a cast-on-anode capacitor cell of claim 1, wherein: in step S30, the method further includes the steps of: and (3) carrying out high-low temperature screening treatment on the capacitor cell obtained by die pressing cold welding forming, wherein the temperature is-55 to +180 ℃.

7. The method of making a cast-on-anode capacitor cell of claim 6, wherein: further comprising: and performing pre-energized treatment on the capacitor cell subjected to high-temperature and low-temperature screening treatment.

8. The method of making a cast-on-anode capacitor cell of claim 7, wherein: further comprising: and performing cathode dip coating generation treatment on the energized capacitor cell.

9. The method of making a cast-on-anode capacitor cell of claim 8, wherein: the cathode target guide material is graphene powder, activated carbon powder, conductive polymer dispersion liquid or conductive aerogel dispersion liquid prepared by the graphene powder, the activated carbon powder and the conductive polymer dispersion liquid.

Technical Field

The invention belongs to the technical field of aluminum electrolytic capacitors, and particularly relates to a method for manufacturing a cast anode capacitor cell.

Background

The capacitor has a function of storing electric energy and instantly discharging the electric energy, and is an indispensable electronic component in the fields of electronics and power. The capacitor is widely applied to circuits such as power supply filtering, signal coupling, resonance, direct current isolation and the like, makes a contribution to the rapid development of modern electronic technology that the capacitor cannot be worn out, is also widely applied to electronic equipment such as household electrical appliances and computers, and is an irreplaceable electronic component in the electrical and electronic industries.

Among the capacitors, the aluminum electrolytic capacitor is the most commonly used device, and generally includes an anode foil, a cathode foil and an electrolytic paper, which are wound together to form a capacitor core package. The electrolytic aluminum anode foil process technology is very mature, capacitors and electronic wastes thereof produced by the electrolytic aluminum anode foil process have a distance of thousands of tons, and the disassembly and recycling of the scrapped capacitors generally generate solid wastes or have a phenomenon of taking aluminum by brutal incineration, so the electrolytic aluminum anode foil process technology is not environment-friendly.

Secondly, in the production process of the foil type electrolytic capacitor, a certain amount of side foil and a winding battery core which does not reach the process are generated, products which do not meet the quality requirement are also generated at the online sampling rate in the process, and concentrated solid waste treatment is carried out after the accumulation amount reaches a certain amount, so that the treatment cost is increased and the environmental protection is not facilitated.

The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.

Disclosure of Invention

It is an object of the present invention to provide a method of manufacturing a cast anode capacitor cell to address at least one of the above mentioned problems of the background art.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

a method of making a cast-in-place anode capacitor cell, comprising the steps of:

s10, grinding the anode foil, the anode foil and/or the waste edge foil of the scrapped aluminum electrolytic capacitor into powder to obtain aluminum foil powder;

s20, carrying out high-temperature purification treatment on the aluminum foil powder to obtain high-purity aluminum anode fragment particles;

and S30, performing die pressing cold welding forming on the high-purity aluminum anode scrap particles to obtain the capacitor battery core with a specific specification.

Further, in step S10, pressing the anode foil, the anode foil and/or the waste edge foil of the scrapped aluminum electrolytic capacitor into an aluminum block, drying the aluminum block, and ball-milling the aluminum block in a ball mill to obtain aluminum foil powder.

Further, in step S10, the anode foil and/or the scrap foil of the aluminum electrolytic capacitor are dried, and then the aluminum foil is placed into an aluminum foil crusher for crushing to obtain aluminum powder.

Further, in step S20, the temperature of the high-temperature purification treatment is 150 to 400 ℃.

Further, step S30 includes the steps of: embedding a current collector into the battery core in advance, wherein the purity of the current collector is 99.99-99.995%.

Further, step S30 includes the steps of: and (3) carrying out high-low temperature screening treatment on the capacitor cell obtained by die pressing cold welding forming, wherein the temperature is-55 to +180 ℃.

Further, the method also comprises the following steps: and performing pre-energized treatment on the capacitor cell subjected to high-temperature and low-temperature screening treatment.

Further, the method also comprises the following steps: and performing cathode dip coating generation treatment on the energized capacitor cell.

Further, the cathode target guide material is graphene powder, activated carbon powder, conductive polymer dispersion liquid or conductive aerogel dispersion liquid prepared by the graphene powder, the activated carbon powder and the conductive polymer dispersion liquid.

The technical scheme of the invention has the beneficial effects that:

compared with the prior art, the manufacturing method of the cast anode capacitor cell provided by the invention has the advantages that the anode foil or the anode foil residue of the waste capacitor is used as a raw material for production, the production cost is reduced, and the environmental protection is facilitated.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flow diagram illustrating a method of manufacturing a cast body anode capacitor cell in accordance with an embodiment of the present invention;

fig. 2 is a schematic diagram of a cast anode capacitor cell according to an embodiment of the invention;

fig. 3 is a schematic diagram of a capacitor according to another embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer and more obvious, so that those skilled in the art can better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, "plurality" means two or more, and the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 and 2, fig. 1 is a flow chart illustrating a method of manufacturing a cast anode capacitor cell, and fig. 2 is a schematic diagram of a capacitor cell; as an embodiment of the present invention, a method for manufacturing a cast-body anode capacitor cell is provided, including the steps of:

s10, grinding the anode foil, the anode foil and/or the waste edge foil of the scrapped aluminum electrolytic capacitor into powder to obtain aluminum foil powder;

specifically, an anode foil, a positive foil and/or a waste edge foil of a scrapped aluminum electrolytic capacitor are pressed into an aluminum block, the aluminum block is dried, water is removed, and the aluminum block is put into a ball mill for ball milling to obtain aluminum foil powder.

In some embodiments, the aluminum foil powder may also be obtained by crushing with an aluminum foil crusher, specifically, drying the anode foil, the anode foil and/or the scrap foil of the scrapped aluminum electrolytic capacitor to remove moisture, and then directly putting the dried anode foil, the dried anode foil and/or the scrap foil of the scrapped aluminum electrolytic capacitor into the aluminum foil crusher to crush, so as to obtain the aluminum powder.

S20, carrying out high-temperature purification treatment on the aluminum foil powder to obtain high-purity aluminum anode fragment particles;

specifically, the aluminum foil split body obtained in the step S10 is subjected to high-temperature purification treatment at the temperature of 150-400 ℃, miscellaneous substances such as solvents, gels and electrolytes in aluminum foil powder are removed, ultrasonic cleaning and dehalogenation and ash removal are carried out uniformly through capacitor-grade deionized water, and finally high-purity aluminum anode fragment particles are obtained.

S30, performing mould pressing cold welding forming on the high-purity aluminum anode scrap particles to obtain a capacitor cell 200 with a specific specification;

performing die pressing cold welding forming on the high-purity aluminum anode scrap particles obtained in the step S20 to prepare a capacitor cell 200 with a specific specification; in some embodiments, the current collector is embedded into the cell in advance before the cell is molded by die welding; the purity of the current collector is 99.99-99.995%, and the shape of the current collector is designed in a matched manner along with the size, the volume and the appearance of a capacitor cell, so that the reasonability of electrode extraction is ensured.

In some embodiments, further comprising: and (3) carrying out high-low temperature screening treatment on the capacitor cell obtained by die pressing cold welding forming, wherein the temperature is-55 to +180 ℃, and carrying out physical screening through a thermal expansion and cold contraction impact process to remove the loose cell unqualified in die welding.

And S40, performing pre-energizing treatment and cathode dip plating generation treatment on the capacitor battery cell 200, and packaging to obtain the capacitor.

The capacitor cell 200 subjected to high and low temperature impact screening is subjected to pre-energizing treatment, and since the aluminum foil powder is originally a pre-energized material, the pre-energizing process in the step S40 mainly aims to repair local damage and integrity of an oxide film, and detailed energizing process conditions can refer to the existing mature forming process technology of the anode aluminum foil, and are not described herein again.

Performing cathode dip-coating generation treatment on the battery cell subjected to energizing treatment; the cathode target guide material is graphene powder, activated carbon powder, conductive polymer dispersion liquid or conductive aerogel dispersion liquid prepared by the graphene powder, the activated carbon powder, the conductive polymer dispersion liquid or the conductive aerogel dispersion liquid, the plurality of dispersion liquids are fully remained among pores of the monomer anode after vacuum impregnation, then baking is carried out to remove the solvent, and the solvent is removed through repeated treatment until the physical capacity of the monomer anode is completely induced and driven (99.99%), so that the cathode filling process is realized.

By the cathode filling process, the anode is driven by electric capacity, and a negative current collector is led out from the composite of the anode and the cathode. Specifically, in order to isolate and homogenize the current, the composite body is coated and isolated by electrolytic paper or a foam adhesive film, and then an electronic foil riveted with a negative lead-out current collector component is wound on the outer periphery of the composite body and is glued and fixed. Wherein the negative electrode electronic foil is a carbon foil with ultrahigh specific volume formed after carbon whiskers grow on the surface of a highly-corroded aluminum foil, and the specific volume is C500 uF-0.5F.

In some embodiments, the cathode immersion treatment is performed again on the cell subjected to the cathode immersion plating generation treatment, and the separator/paper and the pores between the negative electrodes are completely filled, so that the capacitor cell close to the solid-state solid is obtained.

And further, performing moisture-proof, halogen pollution-proof and damage-proof treatment on the capacitor cell, and then packaging the capacitor cell to prepare the capacitor. It should be noted that, in the embodiments of the present invention, the capacitor cell package is not particularly limited, and any package may be adopted without departing from the spirit of the present disclosure, and the present disclosure shall fall within the protection scope of the present disclosure.

In some embodiments, the capacitor cell is half-sealed, specifically, the capacitor cell is extruded and braised in a pot type half-seal by using sealing rubber and an aluminum shell, and the capacitor obtained by the packaging can be effectively applied to an environment of-55 ℃ to +135 ℃.

In some embodiments, the capacitor cells are hermetically encapsulated; specifically, the capacitor cell is packaged in ceramic, glass or plastic by an IC packaging process, and the capacitor obtained by packaging can be applied to the environment of-55 ℃ to +150 ℃.

Referring to fig. 2 and 3, as another embodiment of the present invention, there is also provided a capacitor 300, including a capacitor electric core 200, an aluminum case 100, and a package cover plate 10; the capacitor battery core 200 is obtained by performing die pressing cold welding forming on high-purity aluminum anode scrap particles; the high-purity aluminum anode scrap particles are obtained by high-temperature purification treatment of aluminum foil powder.

In some embodiments, a current collector is embedded in the capacitor electric core 200, and the purity of the current collector is 99.99-99.995%.

In some embodiments, the capacitor cell 200 further comprises a cathode, which is formed by an immersion plating process on the capacitor cell.

In some embodiments, the capacitor 300 further comprises a negative electronic foil, which is a carbon foil with ultra-high specific volume formed after growing carbon whiskers on the surface of the highly corrosive aluminum foil.

It is to be understood that the foregoing is a more detailed description of the invention as it relates to specific/preferred embodiments and that no limitation to the specific embodiments is intended as being implied by the limitation presented herein. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the present patent. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention.

In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the invention as defined by the appended claims.

Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. One of ordinary skill in the art will readily appreciate that the above-disclosed, presently existing or later to be developed, processes, machines, manufacture, compositions of matter, means, methods, or steps, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.