CN113904039B - Anodic oxidation liquid, battery shell, and insulation protection method and application thereof - Google Patents
Anodic oxidation liquid, battery shell, and insulation protection method and application thereof Download PDFInfo
- Publication number
- CN113904039B CN113904039B CN202111163688.1A CN202111163688A CN113904039B CN 113904039 B CN113904039 B CN 113904039B CN 202111163688 A CN202111163688 A CN 202111163688A CN 113904039 B CN113904039 B CN 113904039B
- Authority
- CN
- China
- Prior art keywords
- battery
- shell
- insulating
- battery case
- battery shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/122—Composite material consisting of a mixture of organic and inorganic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/14—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors
- H01M50/145—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors for protecting against corrosion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to the technical field of batteries, in particular to an anodic oxidation liquid, a battery shell, an insulation protection method and application thereof. The battery shell provided by the invention comprises a shell body and a protective layer arranged on the surface of the shell body, wherein the protective layer is made of a composite material formed by aluminum oxide and polyaniline. The battery shell provided by the invention can greatly improve the insulation performance and corrosion resistance of the battery shell.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an anodic oxidation liquid, a battery shell, an insulation protection method and application thereof.
Background
The lithium ion battery has the advantages of high energy density, good safety performance, long cycle life, safety, environmental protection and the like, and is widely applied to electronic consumer products, energy storage, new energy automobiles and the like, wherein the lithium ion battery for the new energy automobiles is called a power battery. Generally, the power battery can be divided into a cylindrical battery, a soft package battery and a square battery according to the packaging form, and the square battery has the highest market occupation ratio due to higher packaging reliability, stable structure, high energy efficiency and simple grouping.
The shell of battery is generally made by aluminium, because it is the metal material, can use polypropylene or polyester's insulating film cladding on the shell surface generally, thereby can avoid metal shell and utmost point post to switch on and initiate the short circuit even whole battery thermal runaway on the one hand, on the other hand can reduce the loss that external foreign matter scratch led to the fact the battery casing to a certain extent, has maintained the pleasing to the eye of battery.
However, the coating of the battery shell requires fixture clamping, the steps are complicated, the time consumption is long, and the production efficiency is affected; if the gas in the film cannot be completely discharged during coating, bubbles are generated on the film, so that the insulating films on two sides of the battery are not easy to align when being folded, the surfaces of the insulating films are folded, the appearance of the battery is affected, the thickness of the battery exceeds the specification, and the difficulty in the process of packaging the subsequent manufacturing module is increased; and as the insulating protective film is made of polypropylene (PP) or Polyester (PET), the following problems are easy to occur: 1. the material has insufficient strength and is easy to scratch, so that the shell of the battery cell is exposed, and the risk of short circuit exists; 2. the insulating protective film has poor heat conduction performance, and the heat volatilization of the battery cell can be influenced by the coating, so that the heat dissipation effect of the battery cell is reduced; 3. the insulating protective film has certain combustibility, is easy to ignite to cause fire when the battery is in thermal runaway, and greatly threatens the safety of the whole battery. In the prior art, although the proposal of arranging the alumina protective film on the surface of the battery aluminum shell is adopted, the technology is only suitable for the sealing process of the cylindrical battery cell, is used for replacing a sealing ring, and has limited insulating property and corrosion resistance.
Disclosure of Invention
The invention aims to overcome the defect of limited insulating property and corrosion resistance of a battery shell in the prior art, and further provides an anodic oxidation liquid, the battery shell, an insulating protection method and application thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a battery shell comprises a shell body and a protective layer arranged on the surface of the shell body, wherein the protective layer is made of a composite material formed by aluminum oxide and polyaniline. It will be appreciated that the protective layer may be on the inner or outer surface of the housing body, preferably with the protective layer on both the inner and outer surfaces of the housing body.
Preferably, the protective layer has a thickness of 15-25 μm, e.g. 15 μm, 17 μm, 18 μm, 20 μm, 22 μm.
Preferably, the aluminum oxide accounts for 75-90% of the total mass of the protective layer material;
the shell body is made of metal aluminum.
The battery shell comprises a cylindrical battery shell and a square battery shell, and the battery shell is a lithium ion battery shell.
The invention also provides an anodic oxidation liquid, which comprises the following components in percentage by mass: 20-40wt% of acid, 5-10wt% of film forming control agent, 3-10wt% of aniline and 40-70wt% of solvent.
Preferably, the acid is selected from one or more of sulfuric acid, oxalic acid and chromic acid;
the film forming control agent is selected from glycerol and/or ammonium sulfate;
the solvent is water.
The battery case may be prepared by an insulation protection method of the following battery case.
The invention also provides application of the anodic oxidation liquid in insulation protection of a battery shell.
The invention also provides an insulation protection method of the battery shell, which comprises the following steps:
placing the battery shell to be treated in an anodic oxidation liquid for electrolysis to form a protective layer on the surface of the battery shell, thus obtaining the battery shell after insulation protection;
the anodic oxidation liquid is the anodic oxidation liquid.
Preferably, the electrolysis step comprises placing the battery shell to be treated in an anodic oxidation liquid, connecting the battery shell with a power anode, connecting the power cathode with the anodic oxidation liquid, and forming a loop between the power anode and the power cathode for electrolysis.
Preferably, the method further comprises the steps of polishing, degreasing and drying the battery shell to be treated;
preferably, a water washing step is further included between the degreasing and drying steps.
Preferably, the degreasing step comprises the step of placing the polished battery case in degreasing liquid for ultrasonic cleaning;
preferably, the degreasing fluid comprises the following components in percentage by mass: 5-8wt% of oil remover, 4-6wt% of surfactant, 1-3wt% of corrosion inhibitor, 1-3wt% of brightening agent and 80-90wt% of solvent;
preferably, the degreasing agent is sodium carbonate and/or sodium silicate; the surfactant is fatty glyceride and/or sodium stearate; the corrosion inhibitor is sodium tripolyphosphate; the brightening agent is sodium benzoate; the solvent is water; preferably, the fatty acid glyceride is glycerol monostearate.
Preferably, the electrolytic current is 1.5-2A/dm 2 The electrolysis time is 30-60min;
the ultrasonic frequency is 30000-40000Hz, and the ultrasonic time is 50-80min;
the drying temperature is 50-70deg.C, and the drying time is 30-50min.
Preferably, the method comprises the steps of,
the battery shell to be treated comprises a cylindrical battery shell and a square battery shell, and the battery shell to be treated is an aluminum shell;
the step of sealing the hole of the battery shell after electrolysis is finished;
preferably, the hole sealing step comprises placing the electrolyzed battery shell in water for standing, preferably, the temperature of the water is 80-100 ℃, the pH value of the water is 6-8, and the standing time is 20-30min.
Preferably, the hole sealing step further comprises a step of performing insulation detection on the battery shell after hole sealing treatment, specifically, detecting the insulation capacity of the battery shell after hole sealing treatment, detecting the leakage current under different voltages, and judging whether the leakage current meets the requirement of being used as a battery shell.
The invention also provides a lithium ion battery, which is provided with the battery shell or the battery shell obtained by the insulation protection method.
The invention has the beneficial effects that:
1. the battery shell provided by the invention comprises a shell body and a protective layer arranged on the surface of the shell body, wherein the protective layer is made of a composite material formed by aluminum oxide and polyaniline. According to the invention, the insulating property and the corrosion resistance of the battery shell can be greatly improved by arranging the composite material protective layer formed by the aluminum oxide and the polyaniline on the surface of the shell body.
2. The anodic oxidation liquid provided by the invention adopts specific anodic oxidation liquid components, can be applied to a battery shell insulation protection method to carry out anodic oxidation on the battery shell and electric polymerization treatment on aniline monomers, and forms a compact alumina/polyaniline composite material protection layer on the inner surface and the outer surface of the shell, so that the insulation performance and corrosion resistance of the battery shell can be greatly improved.
3. According to the insulation protection method for the battery shell, the battery shell is anodized by using current and the aniline monomer is subjected to electropolymerization (the aniline can generate free radicals in anodic oxidation under the condition of being electrified, free radical coupling initiates polymerization, and is an autocatalytic reaction, an initiator is not required to be added), a compact alumina/polyaniline composite material protection layer is formed on the inner surface and the outer surface of the shell, and the protection layer is tightly combined with an aluminum shell body and is not easy to fall off due to in-situ generation; the composite hardness is high, the scratch resistance is high, the insulativity is high, and the short circuit risk of the battery core is reduced; the alumina film is nonflammable, so that the risk of thermal runaway of the battery cell is reduced; the introduction of an external insulating film is avoided, the height and width of the battery are reduced, and the battery is more advantageous in capacity exertion.
Meanwhile, the battery shell obtained by the insulation protection method provided by the invention has the advantages that the insulation corrosion resistance of the battery shell is enhanced, and meanwhile, the whole width and thickness of the battery core are reduced, so that the volume energy density of the battery core is improved. In addition, the process omits the procedure of external coating in the production process of the battery cell, integrates the insulation protection procedure into the production and manufacture of the shell, greatly improves the production efficiency of the battery cell, reduces the reject ratio, and simultaneously improves the space utilization rate of the production line. Meanwhile, the inner surface of the battery shell is also provided with the insulating protection layer, so that the risk of internal short circuit of the battery is reduced, and meanwhile, the corrosion of the electrolyte to the battery shell can be effectively relieved by the internal protection layer. The insulation protection method provided by the invention is simultaneously suitable for square and cylindrical aluminum shells, is simple to operate, and does not need additional type changing operation for switching the processing of shells of different types.
Detailed Description
The following examples are provided for a better understanding of the present invention and are not limited to the preferred embodiments described herein, but are not intended to limit the scope of the invention, any product which is the same or similar to the present invention, whether in light of the present teachings or in combination with other prior art features, falls within the scope of the present invention.
The specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
Example 1
The embodiment provides an insulation protection method for an aluminum shell of a square battery, which comprises the following steps:
1) Mechanical polishing: mechanically polishing the inner and outer surfaces of the square battery aluminum shell formed by stamping by using polishing powder to remove scratches, and reducing the surface roughness of the aluminum shell;
2) Degreasing: placing the polished aluminum shell into an ultrasonic cleaner filled with degreasing fluid for ultrasonic cleaning to remove greasy dirt stained in the mechanical polishing process, wherein the ultrasonic frequency is 40000Hz, and the ultrasonic time is 60min;
the degreasing fluid consists of the following components in percentage by mass: 4wt% of sodium carbonate, 4wt% of sodium silicate, 5wt% of glyceryl monostearate, 1wt% of sodium tripolyphosphate, 1wt% of sodium benzoate and 85wt% of water;
3) Anodic oxidation: washing the aluminum shell subjected to degreasing treatment by using clear water to remove degreasing liquid, and then placing the aluminum shell in an oven for drying at a drying temperature of 50 ℃ for 40min; after drying, placing the aluminum shell into an anodic oxidation solution for electrolysis, wherein the aluminum shell is integrally connected with a power anode, a power cathode is connected with the anodic oxidation solution, a loop is formed between the power cathode and the anodic oxidation solution, and the electrolysis current is 1.5A/dm 2 The electrolysis time is 40min, a layer of protective layer is formed on the inner surface and the outer surface of the aluminum shell after the electrolysis is finished, the protective layer material is a composite material formed by aluminum oxide and polyaniline, and the aluminum oxide accounts for 80% of the total mass of the protective layer material; the thickness of the protective layer is 17 μm;
the anodic oxidation liquid comprises the following components in percentage by mass: 15wt% of sulfuric acid, 10wt% of oxalic acid, 5wt% of glycerin, 5wt% of aniline and 65wt% of water;
4) Hole sealing treatment: and placing the electrolyzed aluminum shell into deionized water for standing for 30min to seal holes on the surface of the porous protective layer, wherein the temperature of the deionized water is 100 ℃, the pH value is 6, and taking out and airing after standing is finished to obtain the square battery aluminum shell after insulation protection.
Example 2
The embodiment provides an insulation protection method for an aluminum shell of a cylindrical battery, which comprises the following steps:
1) Mechanical polishing: mechanically polishing the inner and outer surfaces of the cylindrical battery aluminum shell formed by stamping by using polishing powder to remove scratches, and reducing the surface roughness of the aluminum shell;
2) Degreasing: placing the polished aluminum shell into an ultrasonic cleaner filled with degreasing fluid for ultrasonic cleaning to remove greasy dirt stained in the mechanical polishing process, wherein the ultrasonic frequency is 40000Hz, and the ultrasonic time is 50min;
the degreasing fluid consists of the following components in percentage by mass: 5wt% of sodium carbonate, 3wt% of sodium silicate, 2wt% of glyceryl monostearate, 3wt% of sodium stearate, 1wt% of sodium tripolyphosphate, 1wt% of sodium benzoate and 85wt% of water;
3) Anodic oxidation: washing the aluminum shell subjected to degreasing treatment by using clear water to remove degreasing liquid, and then placing the aluminum shell in an oven for drying at a drying temperature of 60 ℃ for 50min; after drying, placing the aluminum shell into an anodic oxidation solution for electrolysis, wherein the aluminum shell is integrally connected with a power anode, a power cathode is connected with the anodic oxidation solution, a loop is formed between the power cathode and the anodic oxidation solution, and the electrolysis current is 2A/dm 2 The electrolysis time is 50min, a layer of protective layer is formed on the inner surface and the outer surface of the aluminum shell after the electrolysis is finished, the protective layer material is a composite material formed by aluminum oxide and polyaniline, and the aluminum oxide accounts for 85% of the total mass of the protective layer material; the thickness of the protective layer is 20 μm;
the anodic oxidation liquid comprises the following components in percentage by mass: 20wt% of sulfuric acid, 15wt% of oxalic acid, 3wt% of glycerin, 3wt% of ammonium sulfate, 6wt% of aniline and 53wt% of water;
4) Hole sealing treatment: and placing the electrolyzed aluminum shell into deionized water for standing for 30min to seal holes on the surface of the porous protective layer, wherein the temperature of the deionized water is 100 ℃, the pH value is 6, and taking out and airing after standing is finished to obtain the square battery aluminum shell after insulation protection.
Example 3
The embodiment provides an insulation protection method for an aluminum shell of a cylindrical battery, which comprises the following steps:
1) Mechanical polishing: mechanically polishing the inner and outer surfaces of the cylindrical battery aluminum shell formed by stamping by using polishing powder to remove scratches, and reducing the surface roughness of the aluminum shell;
2) Degreasing: placing the polished aluminum shell into an ultrasonic cleaner filled with degreasing fluid for ultrasonic cleaning to remove greasy dirt stained in the mechanical polishing process, wherein the ultrasonic frequency is 30000Hz, and the ultrasonic time is 80min;
the degreasing fluid consists of the following components in percentage by mass: 5wt% of sodium silicate, 4wt% of sodium stearate, 3wt% of sodium tripolyphosphate, 3wt% of sodium benzoate and 85wt% of water;
3) Anodic oxidation: washing the aluminum shell subjected to degreasing treatment by using clear water to remove degreasing liquid, and then placing the aluminum shell in an oven for drying at a drying temperature of 70 ℃ for 30min; after drying, placing the aluminum shell into an anodic oxidation solution for electrolysis, wherein the aluminum shell is integrally connected with a power anode, a power cathode is connected with the anodic oxidation solution, a loop is formed between the power cathode and the anodic oxidation solution, and the electrolysis current is 2A/dm 2 The electrolysis time is 30min, a layer of protective layer is formed on the inner surface and the outer surface of the aluminum shell after the electrolysis is finished, the protective layer material is a composite material formed by aluminum oxide and polyaniline, and the aluminum oxide accounts for 75% of the total mass of the protective layer material; the thickness of the protective layer is 15 μm;
the anodic oxidation liquid comprises the following components in percentage by mass: 40wt% of sulfuric acid, 5wt% of glycerol, 3wt% of aniline and 52wt% of water;
4) Hole sealing treatment: and placing the electrolyzed aluminum shell into deionized water for standing for 20min to seal holes on the surface of the porous protective layer, wherein the temperature of the deionized water is 80 ℃, the pH value is 8, and taking out and airing after standing is finished to obtain the square battery aluminum shell after insulation protection.
Comparative example 1 (without aniline monomer)
The comparative example provides an insulation protection method for an aluminum shell of a square battery, which comprises the following steps:
1) Mechanical polishing: mechanically polishing the inner and outer surfaces of the square battery aluminum shell formed by stamping by using polishing powder to remove scratches, and reducing the surface roughness of the aluminum shell;
2) Degreasing: placing the polished aluminum shell into an ultrasonic cleaner filled with degreasing fluid for ultrasonic cleaning to remove greasy dirt stained in the mechanical polishing process, wherein the ultrasonic frequency is 40000Hz, and the ultrasonic time is 60min;
the degreasing fluid consists of the following components in percentage by mass: 4wt% of sodium carbonate, 4wt% of sodium silicate, 5wt% of glyceryl monostearate, 1wt% of sodium tripolyphosphate, 1wt% of sodium benzoate and 85wt% of water;
3) Anodic oxidation: washing the aluminum shell subjected to degreasing treatment by using clear water to remove degreasing liquid, and then placing the aluminum shell in an oven for drying at a drying temperature of 50 ℃ for 40min; after drying, placing the aluminum shell into an anodic oxidation solution for electrolysis, wherein the aluminum shell is integrally connected with a power anode, a power cathode is connected with the anodic oxidation solution, a loop is formed between the power cathode and the anodic oxidation solution, and the electrolysis current is 1.5A/dm 2 The electrolysis time is 40min, a protective layer is formed on the inner surface and the outer surface of the aluminum shell after the electrolysis is finished, and the protective layer is made of aluminum oxide; the thickness of the protective layer is 17 μm;
the anodic oxidation liquid comprises the following components in percentage by mass: 15wt% of sulfuric acid, 10wt% of oxalic acid, 5wt% of glycerol and 70wt% of water;
4) Hole sealing treatment: and placing the electrolyzed aluminum shell into deionized water for standing for 30min to seal holes on the surface of the porous protective layer, wherein the temperature of the deionized water is 100 ℃, the pH value is 6, and taking out and airing after standing is finished to obtain the square battery aluminum shell after insulation protection.
Test example 1
The battery aluminum cases after insulation protection obtained in the above examples and comparative examples were subjected to resistance detection using a universal meter, and the detection positions of the aluminum cases in the examples and comparative examples were the same, and the detection results are shown in table 1.
TABLE 1 aluminum case resistance
| Resistor (omega) | |
| Example 1 | 1.23*10 5 |
| Example 2 | 1.98*10 5 |
| Example 3 | 9.7*10 4 |
| Comparative example 1 | 2.03*10 4 |
As shown in Table 1, the protective layer of the alumina/polyaniline composite material of the present invention has higher resistance and better insulation properties than the single alumina film layer.
Test example 2
The insulating-protected battery aluminum cases obtained in the above examples and comparative examples were subjected to a neutral salt spray test in which a 5 mass% aqueous sodium chloride salt solution (pH 6.5) was used as a spray solution at 35 ℃ and 96% humidity, and the salt spray sedimentation rate was 2 ml/(h cm) 2 ) The corrosion resistance of the aluminum shell is detected, and the test result shows that: after 168 hours, only slight corrosion products appeared on the surface of the aluminum shell in example 1; after 180 hours the aluminum shell surface in example 2 only showed slight corrosion products; after 140 hours the aluminum shell surface in example 3 only showed slight corrosion products; the pitting corrosion occurs on the surface of the aluminum shell of the comparative example 1 after 96 hours, which indicates that the aluminum oxide and polyaniline composite material protective layer has more excellent corrosion resistance.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (11)
1. An insulation protection method of a battery case, comprising the steps of:
placing the battery shell to be treated in an anodic oxidation liquid for electrolysis to form a protective layer on the surface of the battery shell, thus obtaining the battery shell after insulation protection;
the anodic oxidation liquid comprises the following components in percentage by mass: 20-40wt% of acid, 5-10wt% of film forming control agent, 3-10% of aniline and 40-70wt% of water;
the electrolysis current is 1.5-2A/dm 2 The electrolysis time is 30-60 min.
2. The method for insulating and protecting a battery case according to claim 1, wherein the acid is one or more selected from sulfuric acid, oxalic acid, chromic acid;
the film forming control agent is selected from glycerol and/or ammonium sulfate.
3. The method of insulating a battery case according to claim 1, further comprising the step of polishing, degreasing, and drying the battery case to be treated.
4. The method for insulating and protecting a battery case according to claim 3, wherein,
the degreasing step comprises the step of placing the polished battery shell in degreasing liquid for ultrasonic cleaning.
5. The method for insulating and protecting a battery case according to claim 4, wherein,
the degreasing fluid comprises the following components in percentage by mass: 5-8wt% of oil remover, 4-6wt% of surfactant, 1-3% of corrosion inhibitor, 1-3% of brightening agent and 80-90wt% of solvent.
6. The method for insulating and protecting a battery case according to claim 5, wherein,
the degreasing agent is sodium carbonate and/or sodium silicate; the surfactant is fatty glyceride and/or sodium stearate; the corrosion inhibitor is sodium tripolyphosphate; the brightening agent is sodium benzoate; the solvent is water.
7. The method for insulating and protecting a battery case according to claim 4, wherein,
the ultrasonic frequency is 30000-40000Hz, and the ultrasonic time is 50-80min;
the drying temperature is 50-70deg.C, and the drying time is 30-50min.
8. A method for insulating and protecting a battery case according to claim 1 or 3, wherein,
the battery shell to be treated comprises a cylindrical battery shell and a square battery shell, and the battery shell to be treated is an aluminum shell;
and the step of sealing the hole of the battery shell after the electrolysis is finished.
9. The method for insulating and protecting a battery case according to claim 8, wherein,
the hole sealing step comprises the step of placing the electrolyzed battery shell in water for standing.
10. The method for insulating and protecting a battery case according to claim 9, wherein,
the temperature of the water is 80-100 ℃, the pH value of the water is 6-8, and the standing time is 20-30min.
11. A lithium ion battery, characterized in that it has a battery case obtained by the insulation protection method according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111163688.1A CN113904039B (en) | 2021-09-30 | 2021-09-30 | Anodic oxidation liquid, battery shell, and insulation protection method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111163688.1A CN113904039B (en) | 2021-09-30 | 2021-09-30 | Anodic oxidation liquid, battery shell, and insulation protection method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113904039A CN113904039A (en) | 2022-01-07 |
| CN113904039B true CN113904039B (en) | 2023-08-08 |
Family
ID=79190174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111163688.1A Active CN113904039B (en) | 2021-09-30 | 2021-09-30 | Anodic oxidation liquid, battery shell, and insulation protection method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113904039B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3904661A1 (en) * | 1989-02-16 | 1990-08-23 | Licentia Gmbh | Method for producing an oxide-containing layer |
| CA2301625A1 (en) * | 1997-08-27 | 1999-03-04 | Jude Runge-Marchese | Electrochemical deposition of a composite polymer-metal oxide |
| WO1999035308A2 (en) * | 1998-01-05 | 1999-07-15 | Zipperling Kessler & Co. (Gmbh & Co.) | Anodically formed intrinsically conductive polymer-aluminum oxide composite as a coating on aluminum |
| CN102304743A (en) * | 2011-09-16 | 2012-01-04 | 南南铝业股份有限公司 | Electrochemical oxidation film sealing method for aluminum/aluminum alloy surface |
| CN102347475A (en) * | 2010-07-27 | 2012-02-08 | 曾永斌 | High-performance lithium ion battery and preparation process thereof |
| CN104264201A (en) * | 2014-09-26 | 2015-01-07 | 清华大学深圳研究生院 | Method for preparing B4C/Al composite material corrosion-resistance film and neutron absorption material |
| CN104404592A (en) * | 2014-11-11 | 2015-03-11 | 无锡鸿声铝业有限公司 | Aluminum alloy surface processing technology |
| CN104831328A (en) * | 2015-05-28 | 2015-08-12 | 西南交通大学 | Integrated hole sealing method for anodic oxide films of aluminum alloys |
| CN106149028A (en) * | 2016-07-14 | 2016-11-23 | 安徽恒兴装饰工程有限公司 | A kind of aluminium alloy extrusions coloring front surface processing technology |
| CN107338463A (en) * | 2017-07-11 | 2017-11-10 | 深圳仕上电子科技有限公司 | The Hard anode oxidation method of panel class Product processing part of appliance |
| CN110373626A (en) * | 2019-08-21 | 2019-10-25 | 重庆臻宝实业有限公司 | The aluminum oxide coating layer method for sealing of anti-plasma corrosion |
| CN112853430A (en) * | 2020-12-31 | 2021-05-28 | 西比里电机技术(苏州)有限公司 | Method for reducing surface roughness of thermoelectric chemical oxidation ceramic membrane |
-
2021
- 2021-09-30 CN CN202111163688.1A patent/CN113904039B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3904661A1 (en) * | 1989-02-16 | 1990-08-23 | Licentia Gmbh | Method for producing an oxide-containing layer |
| CA2301625A1 (en) * | 1997-08-27 | 1999-03-04 | Jude Runge-Marchese | Electrochemical deposition of a composite polymer-metal oxide |
| US5980723A (en) * | 1997-08-27 | 1999-11-09 | Jude Runge-Marchese | Electrochemical deposition of a composite polymer metal oxide |
| WO1999035308A2 (en) * | 1998-01-05 | 1999-07-15 | Zipperling Kessler & Co. (Gmbh & Co.) | Anodically formed intrinsically conductive polymer-aluminum oxide composite as a coating on aluminum |
| CN102347475A (en) * | 2010-07-27 | 2012-02-08 | 曾永斌 | High-performance lithium ion battery and preparation process thereof |
| CN102304743A (en) * | 2011-09-16 | 2012-01-04 | 南南铝业股份有限公司 | Electrochemical oxidation film sealing method for aluminum/aluminum alloy surface |
| CN104264201A (en) * | 2014-09-26 | 2015-01-07 | 清华大学深圳研究生院 | Method for preparing B4C/Al composite material corrosion-resistance film and neutron absorption material |
| CN104404592A (en) * | 2014-11-11 | 2015-03-11 | 无锡鸿声铝业有限公司 | Aluminum alloy surface processing technology |
| CN104831328A (en) * | 2015-05-28 | 2015-08-12 | 西南交通大学 | Integrated hole sealing method for anodic oxide films of aluminum alloys |
| CN106149028A (en) * | 2016-07-14 | 2016-11-23 | 安徽恒兴装饰工程有限公司 | A kind of aluminium alloy extrusions coloring front surface processing technology |
| CN107338463A (en) * | 2017-07-11 | 2017-11-10 | 深圳仕上电子科技有限公司 | The Hard anode oxidation method of panel class Product processing part of appliance |
| CN110373626A (en) * | 2019-08-21 | 2019-10-25 | 重庆臻宝实业有限公司 | The aluminum oxide coating layer method for sealing of anti-plasma corrosion |
| CN112853430A (en) * | 2020-12-31 | 2021-05-28 | 西比里电机技术(苏州)有限公司 | Method for reducing surface roughness of thermoelectric chemical oxidation ceramic membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113904039A (en) | 2022-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102345145B (en) | Method for electroplating surface of molybdenum and copper alloy | |
| CN105551805B (en) | The middle processing method of medium-high voltage aluminum electrolytic capacitor electrode foil | |
| CN101029413B (en) | Production of medium-high voltage anode corrosive foil | |
| CN100559527C (en) | The caustic solution of high pressure high specific volume anode foil | |
| CN100587126C (en) | Method for erosion of supervoltage high specific volume anode foil | |
| CN105200509B (en) | A kind of cleaning method of electron stored energy material | |
| CN103510090A (en) | Pretreatment fluids and pretreatment method for improving corrosion resistance of aluminium alloy | |
| CN112117128B (en) | High-specific-volume and high-strength medium-high voltage corrosion electrode foil and preparation method and application thereof | |
| CN113904039B (en) | Anodic oxidation liquid, battery shell, and insulation protection method and application thereof | |
| CN102082050B (en) | Deep corrosion method of electrode aluminum foil for flash lamp | |
| CN112080774A (en) | Surface treatment method for aluminum alloy rotor flange shell of offshore wind plant | |
| CN101645354B (en) | Preparation method of high pressure anode foil for aluminum electrolytic capacitor | |
| CN103668132B (en) | A kind of activated solution and the application in electroless nickel plating on magnesium thereof | |
| CN114000181A (en) | High-water-resistance low-pressure formed foil and forming method and application thereof | |
| CN112103084B (en) | Anode foil and preparation method thereof | |
| CN109628979A (en) | A kind of manufacturing method of extremely low pressure Fabrication of High Specific Capacitance Waste Acid From Hua Cheng Foil | |
| CN101225539A (en) | Multi-stage frequency-conversion eroding method for anode foil of aluminium electrolytic capacitor | |
| CN110257893A (en) | A kind of aluminum foil corrosion technique | |
| CN105742067A (en) | Aluminum foil production method capable of improving capacitance extraction rate of solid-state capacitor and decreasing leakage current of solid-state capacitor | |
| CN106024393A (en) | Preparation method for aluminium electrolytic capacitor based on coupling corrosion of positive electrode aluminium foil electrode reaction | |
| CN101863174A (en) | Hole sealing process for use in thermal-sensitive computer-to-plate (CTP) plate production | |
| CN111139508B (en) | Chemical conversion solution, chemical conversion method, and anode foil | |
| CN110195232A (en) | A kind of caustic solution of stroboscopic lamp capacitor anode foils | |
| CN108441922B (en) | Magnesium alloy hub surface treatment process | |
| KR102002801B1 (en) | Chromeless surface treatment of lead tab for improving corrosion resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |