CN110983412A - Application of hard aluminum oxide film prepared based on in-situ generation method in aluminum-shell lithium battery insulation sealing - Google Patents
Application of hard aluminum oxide film prepared based on in-situ generation method in aluminum-shell lithium battery insulation sealing Download PDFInfo
- Publication number
- CN110983412A CN110983412A CN201910229767.4A CN201910229767A CN110983412A CN 110983412 A CN110983412 A CN 110983412A CN 201910229767 A CN201910229767 A CN 201910229767A CN 110983412 A CN110983412 A CN 110983412A
- Authority
- CN
- China
- Prior art keywords
- shell
- aluminum
- oxide film
- battery
- aluminum oxide
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/12—Anodising more than once, e.g. in different baths
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
-
- 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
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- 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
- H01M50/183—Sealing members
-
- 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 patent discloses an application of a hard aluminum oxide film prepared based on an in-situ generation method in insulation sealing of a lithium battery shell. Two layers of compact aluminum oxide films are sequentially generated on the surface of the aluminum battery shell by an in-situ generation method, and the films have strong adhesive force on the surface of the shell and are not easy to fall off. In the process of sealing the battery, the battery shell processed by the method can be directly integrated with the cover cap with great strength, and the use of an insulating rubber ring is avoided. The aluminium oxide membrane that the normal position generated acts as the insulating layer between casing and block, compares in the tradition mode of sealing, and the distance shortens to only one hundred more microns between aluminium casing and the block in this patent, has saved the battery inner space greatly, is favorable to improving battery energy density, because aluminium oxide layer texture is hard moreover, can guarantee the high strength that the battery sealed, is favorable to improving the long-term stability of battery.
Description
Technical Field
The invention relates to the field of lithium batteries, in particular to an insulation sealing treatment method of an aluminum lithium battery shell.
Background
With the wider and wider application of lithium batteries in the field of power, the performance requirements for lithium batteries are also more demanding. Lithium batteries require not only high energy density but also long cycle life. However, it is known that lithium batteries are very sensitive to oxygen and moisture, and even if the batteries have micro leakage, the performance of the batteries is seriously degraded, and if the leakage is serious, a combustion explosion accident may be caused. Therefore, the sealing performance of the lithium battery is not only the basis and guarantee of the performance of the lithium battery, but also the safety problem, and is a crucial part.
In 18650 batteries, the sealing process of the battery is usually to apply an insulating rubber ring between the case and the cap, and to use a sealing device to wrap the case around the insulating rubber ring with a certain mechanical strength, thereby sealing the battery. However, the insulating rubber ring is large in thickness and soft in texture, the sealing strength of the battery is difficult to guarantee, the insulating rubber ring is aged along with the accumulation of time, the airtightness of the battery is poor, and meanwhile, the insulating rubber ring occupies a large space of the battery, so that the energy density of the battery is reduced.
The patent carries out a large amount of researches on a lithium battery sealing method, and in order to fundamentally solve the problems, the patent provides a bold innovative method, an insulating rubber ring is not used, but a compact and hard aluminum oxide film is directly generated on the surface of a battery shell in situ, so that the shell attached with the aluminum oxide film is directly held with a cover cap into a whole with great mechanical strength. The insulating property and the compact and hard characteristics of the alumina film are utilized to ensure that the battery can insulate two poles and can achieve good sealing property. In order to realize the soft contact between the shell with the alumina film and the cap and avoid the abrasion between two hard objects, the sealing contact part of the cap is coated with about 100 mu m of lithium ion battery sealant in advance.
Disclosure of Invention
The patent discloses an application of a hard aluminum oxide film prepared based on an in-situ generation method in insulation sealing of a lithium battery shell. Two layers of compact aluminum oxide films are sequentially generated on the surface of the aluminum battery shell by an in-situ generation method, and the films have strong adhesive force on the surface of the shell and are not easy to fall off. In the process of sealing the battery, the battery shell processed by the method can be directly integrated with the cover cap with great strength, and the use of an insulating rubber ring is avoided. The aluminium oxide membrane that the normal position generated acts as the insulating layer between casing and block, compares in the tradition mode of sealing, and the distance shortens to only one hundred more microns between aluminium casing and the block in this patent, has saved the battery inner space greatly, is favorable to improving battery energy density, because aluminium oxide layer texture is hard moreover, can guarantee the high strength that the battery sealed, is favorable to improving the long-term stability of battery. In the implementation process of the patent, in order to realize the soft contact between the alumina membrane shell and the cap and avoid the scratch between the contact surfaces caused by the abrasion between two hard objects, the sealing contact part of the cap is coated with about 100 mu m of lithium ion battery sealant in advance.
Detailed Description
The invention adopts the following technical scheme to prepare the hard aluminum oxide film on the lithium battery shell based on an in-situ generation method, and the steps are as follows.
(1) The method comprises the steps of pretreating a to-be-processed part of an aluminum battery shell, wherein the pretreatment process comprises the steps of firstly grinding 400-mesh, 800-mesh and 1000-mesh abrasive paper in sequence, then polishing by using polishing powder, washing dust of the to-be-processed part with distilled water, then soaking the part in acetone for ultrasonic cleaning and oil removal for 5-2 hours, finally placing the part in 0.1-5 mol/L sulfuric acid solution for surface erosion for 5 s-2 min, washing the surface sulfuric acid solution with distilled water, and drying for later use.
(2) And (2) preparing an aluminum oxide film by a first electrochemical in-situ generation method, immersing the part to be processed of the aluminum battery shell to be pretreated obtained in the step (1) into sulfuric acid electrolyte with the concentration of 0.5-2 mol/L in an electrolytic bath, taking an inert electrode as a cathode and an aluminum shell as an anode, controlling the electrolytic environment to be +/-2 ℃, and carrying out in-situ generation on the anode for 1-3 h under the condition of 20-100 mA current to obtain the aluminum oxide film with the thickness of about 10 mu m.
(3) Preparing an aluminum oxide film by a secondary electrochemical in-situ generation method, taking an inert electrode as a cathode, taking the part to be processed of the aluminum battery shell which is obtained in the step (2) and preliminarily forms the aluminum oxide film with a certain thickness as an anode, controlling the temperature of an electrolytic bath to be between 10 and 30 ℃, the in-situ generated current to be between 500mA and 1A, and the in-situ generated time to be 3 to 5 hours, and preparing the compact aluminum oxide film with the thickness of about 20 mu m again;
(4) placing the aluminum battery shell with the alumina film prepared by the two-time in-situ generation method in deionized water with the pH = 5-7, controlling the temperature to be 85-100 ℃, and performing hole sealing operation for 30 min-1 h.
(5) The battery shell treated by the in-situ generation method is used for producing the lithium battery, and after the battery shell is filled with the battery core and the pre-treated cover cap is installed, the battery is placed on a sealing device at 0.1MPa/cm2~1MPa/cm2The mechanical strength of the aluminum shell enables the shell with the aluminum oxide film to directly wrap the cap coated with the sealant after being wound, the winding and wrapping length of the aluminum shell is 1.5cm, and the aluminum oxide film is arranged between the shell and the cap coated with the sealant, so that the aluminum shell serves as an insulating layer and plays a role in airtightness.
The invention will be further illustrated by the following specific examples of a 50125 model battery.
Example 1
(1) Pretreating a part to be processed of a 50125 aluminum battery shell, wherein the thickness of the aluminum shell is 0.3cm, the inner surface and the outer surface of the shell and the end face within 2cm from the sealed end are sequentially polished by 400-mesh, 800-mesh and 1000-mesh abrasive paper, polished by polishing powder, washed by distilled water, immersed in acetone for ultrasonic cleaning and oil removal for 10min, finally placed in 0.5mol/L sulfuric acid solution for surface erosion for 30s, cleaned by distilled water and dried for later use.
(2) And (2) preparing an aluminum oxide film by a first electrochemical in-situ generation method, suspending the 50125 battery shell obtained in the step (1) above an electrolytic bath, immersing the pretreated 2cm sealing surface into an electrolyte in the electrolytic bath, wherein the electrolyte is 1mol/L sulfuric acid, an inert electrode is used as a cathode, an aluminum shell is used as an anode, controlling the electrolytic environment to be +/-2 ℃, and carrying out in-situ generation on the anode for 3 hours under the condition of 80mA current to obtain the aluminum oxide film with the thickness of about 10 microns.
(3) And (3) preparing an aluminum oxide film by a secondary electrochemical in-situ generation method, taking an inert electrode as a cathode, taking the part to be processed of the aluminum battery shell which is obtained in the step (2) and preliminarily forms the aluminum oxide film with a certain thickness as an anode, controlling the temperature of an electrolytic bath to be 25 ℃, controlling the in-situ generated current to be 800mA, and controlling the in-situ generated time to be 3.5h, thereby preparing the compact aluminum oxide film with the thickness of about 20 mu m again.
(4) Placing a 50125 battery shell attached with an alumina film prepared by a twice in-situ generation method in deionized water with the pH = 5-7, controlling the temperature to be 95 ℃, and performing hole sealing operation for 50 min.
(5) The 50125 battery shell treated by in-situ generation method is used for producing lithium battery, and after being filled with battery core and mounted with cap coated with sealant, the battery is placed on sealing equipment at 0.5MPa/cm2The mechanical strength of the aluminum shell enables the shell with the aluminum oxide film to directly wrap the cap coated with the sealant after being wound, the winding and wrapping length of the aluminum shell is 1.5cm, and the aluminum oxide film is arranged between the shell and the cap coated with the sealant, so that the aluminum shell serves as an insulating layer and plays a role in airtightness.
Claims (5)
1. The application of the hard aluminum oxide film prepared based on the in-situ generation method in the insulation sealing of the aluminum-shell lithium battery is characterized by comprising the following steps of:
(1) the method comprises the following steps of pretreating a to-be-processed part of an aluminum battery shell, wherein the to-be-processed part of the aluminum battery shell is firstly polished by 400-mesh, 800-mesh and 1000-mesh abrasive paper in sequence, then polished by polishing powder, dust of the to-be-processed part is washed clean by distilled water, then soaked in an acetone solution for ultrasonic cleaning and oil removal for 5-10 min, then placed in sulfuric acid with the concentration of 0.1-5 mol/L or sodium hydroxide erosion liquid with the concentration of 1-10 mol/L for surface erosion for 10-2 min, finally cleaned by distilled water, and dried for later use;
(2) preparing an aluminum oxide film by a primary in-situ generation method, immersing the part to be processed of the aluminum battery shell pretreated in the step (1) into electrolyte in an electrolytic bath, taking an inert electrode as a cathode and the part to be processed of the aluminum battery shell as an anode, controlling the electrolytic environment to be a specific temperature, and carrying out in-situ generation on the anode for a certain time at a certain current to preliminarily form a layer of compact aluminum oxide film;
(3) preparing an aluminum oxide film by a secondary in-situ generation method, changing the concentration and temperature of electrolyte in an electrolytic bath, taking an inert electrode as a cathode, taking the part to be processed of the aluminum battery shell which is obtained in the step (2) and preliminarily forms the aluminum oxide film with a certain thickness as an anode, preparing the aluminum oxide film by the secondary in-situ generation method under certain current and time, and preparing the aluminum oxide film with a certain thickness secondarily;
(4) placing the aluminum battery shell with the alumina film prepared by the two-time in-situ generation method in deionized water with the pH = 5-7, controlling the temperature to be 85-100 ℃, and performing hole sealing operation for 30 min-1 h.
2. The application of the hard aluminum oxide film prepared based on the in-situ generation method in the insulation sealing of the aluminum-shell lithium battery as claimed in claim 1, wherein in the step (1), the types of the lithium battery shell to be processed comprise 14650 batteries, 18650 batteries, 21700 batteries, 26650 batteries, 32650 batteries, 50125 batteries and square batteries, the thickness of the battery shell to be processed is 0.2 mm-1.5 mm, and the part to be processed is positioned on the inner surface and the end part of the shell within 1 cm-3 cm from the sealing end of the battery.
3. The application of the hard aluminum oxide film prepared based on the in-situ generation method in the insulation sealing of the aluminum-shell lithium battery as claimed in claim 1, wherein in the step (2), the electrolyte is a dilute sulfuric acid solution with a concentration of 0.5 mol/L-2 mol/L, the electrolysis environment temperature is +/-2 ℃, the current is 20 mA-100 mA, the in-situ generation time is 3 h-5 h, and the thickness of the obtained aluminum oxide film is about 10 μm.
4. The application of the hard aluminum oxide film prepared by the in-situ generation method in the insulation sealing of the aluminum-shell lithium battery as claimed in claim 1 is characterized in that in the step (3), the electrolyte is a sulfuric acid solution, the concentration is 3-5 mol/L, the electrolysis environment temperature is 10-30 ℃, the current is 500 mA-1A, the in-situ generation time is 1-3 h, and the thickness of the secondarily prepared compact aluminum oxide film is about 20 μm.
5. The use of the in situ formation-based method for preparing a hard aluminum oxide film for insulating and sealing an aluminum-clad lithium battery as claimed in claim 1, wherein the cap coated with the sealant is mounted on the battery case treated by the in situ formation method, and is placed on the sealing equipment at a pressure of 0.1MPa/cm2~1MPa/cm2The mechanical strength of the aluminum shell enables the shell with the aluminum oxide film to directly wrap the cap coated with the sealant after being wound, the winding and wrapping length of the aluminum shell is 0.5 cm-2.5 cm, and the aluminum oxide film is arranged between the shell and the cap coated with the sealant, so that the aluminum shell serves as an insulating layer and plays a role in airtightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910229767.4A CN110983412B (en) | 2019-03-26 | 2019-03-26 | Application of hard aluminum oxide film prepared based on in-situ generation method in aluminum-shell lithium battery insulation sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910229767.4A CN110983412B (en) | 2019-03-26 | 2019-03-26 | Application of hard aluminum oxide film prepared based on in-situ generation method in aluminum-shell lithium battery insulation sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110983412A true CN110983412A (en) | 2020-04-10 |
| CN110983412B CN110983412B (en) | 2022-03-29 |
Family
ID=70081540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910229767.4A Active CN110983412B (en) | 2019-03-26 | 2019-03-26 | Application of hard aluminum oxide film prepared based on in-situ generation method in aluminum-shell lithium battery insulation sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110983412B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000100395A (en) * | 1998-09-21 | 2000-04-07 | Sanyo Electric Co Ltd | Secondary battery |
| US20110183190A1 (en) * | 2010-01-26 | 2011-07-28 | Sungkab Kim | Case for a secondary battery and manufacturing method thereof |
| US20110183192A1 (en) * | 2010-01-26 | 2011-07-28 | Sungkab Kim | Case for secondary battery and method of manufacturing case |
| CN103866369A (en) * | 2013-12-27 | 2014-06-18 | 陕西航天导航设备有限公司 | Insulation protection method for local hard anodizing of precision parts |
| CN103999254A (en) * | 2012-02-07 | 2014-08-20 | 株式会社Lg化学 | Embedded battery cell having novel structure |
| JP2014182872A (en) * | 2013-03-18 | 2014-09-29 | Uacj Corp | Sheath material for batteries, and aluminum foil |
| CN104451818A (en) * | 2014-11-17 | 2015-03-25 | 中国人民解放军空军工程大学 | Insulating metal plate and preparation method thereof |
| CN105474453A (en) * | 2013-09-05 | 2016-04-06 | 株式会社Lg化学 | Method for manufacturing rectangular battery cell using metal plates |
| CN105591123A (en) * | 2014-11-10 | 2016-05-18 | 丰田自动车株式会社 | Fuel cell module |
| CN105609673A (en) * | 2014-11-13 | 2016-05-25 | 丰田自动车株式会社 | Method of manufacturing fuel cell case |
| CN105789495A (en) * | 2016-03-13 | 2016-07-20 | 周怡君 | Lithium battery shell |
| CN108193250A (en) * | 2018-02-24 | 2018-06-22 | 沈阳富创精密设备有限公司 | A kind of sulfuric acid+nitration mixture mixing anode oxidation process |
| CN109183114A (en) * | 2018-09-30 | 2019-01-11 | 托伦斯半导体设备启东有限公司 | A kind of Hard Anodic Oxidation Process |
-
2019
- 2019-03-26 CN CN201910229767.4A patent/CN110983412B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000100395A (en) * | 1998-09-21 | 2000-04-07 | Sanyo Electric Co Ltd | Secondary battery |
| US20110183190A1 (en) * | 2010-01-26 | 2011-07-28 | Sungkab Kim | Case for a secondary battery and manufacturing method thereof |
| US20110183192A1 (en) * | 2010-01-26 | 2011-07-28 | Sungkab Kim | Case for secondary battery and method of manufacturing case |
| CN103999254A (en) * | 2012-02-07 | 2014-08-20 | 株式会社Lg化学 | Embedded battery cell having novel structure |
| JP2014182872A (en) * | 2013-03-18 | 2014-09-29 | Uacj Corp | Sheath material for batteries, and aluminum foil |
| CN105474453A (en) * | 2013-09-05 | 2016-04-06 | 株式会社Lg化学 | Method for manufacturing rectangular battery cell using metal plates |
| CN103866369A (en) * | 2013-12-27 | 2014-06-18 | 陕西航天导航设备有限公司 | Insulation protection method for local hard anodizing of precision parts |
| CN105591123A (en) * | 2014-11-10 | 2016-05-18 | 丰田自动车株式会社 | Fuel cell module |
| CN105609673A (en) * | 2014-11-13 | 2016-05-25 | 丰田自动车株式会社 | Method of manufacturing fuel cell case |
| CN104451818A (en) * | 2014-11-17 | 2015-03-25 | 中国人民解放军空军工程大学 | Insulating metal plate and preparation method thereof |
| CN105789495A (en) * | 2016-03-13 | 2016-07-20 | 周怡君 | Lithium battery shell |
| CN108193250A (en) * | 2018-02-24 | 2018-06-22 | 沈阳富创精密设备有限公司 | A kind of sulfuric acid+nitration mixture mixing anode oxidation process |
| CN109183114A (en) * | 2018-09-30 | 2019-01-11 | 托伦斯半导体设备启东有限公司 | A kind of Hard Anodic Oxidation Process |
Non-Patent Citations (2)
| Title |
|---|
| 徐国荣等主编: "《电化学设备与工程设计》", 31 March 2018, 中国矿业大学出版社 * |
| 胡传炘主编: "《表面处理技术手册（修订版）》", 31 July 2009, 北京工业大学出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110983412B (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100250860B1 (en) | Current collector for lithium ion batteries and a method of preparing the same | |
| US5621607A (en) | High performance double layer capacitors including aluminum carbon composite electrodes | |
| CN103400959B (en) | Diaphragm for lithium ion battery, production method thereof, and battery core | |
| JPH0258317A (en) | Manufacture of electrode foil for aluminum electrolytic capacitor | |
| CN101217188A (en) | A manufacturing method of button lithium battery steel shell and the corresponding batteries | |
| JP2008066681A (en) | Electrochemical capacitor and method of manufacturing zinc electrode used in the electrochemical capacitor | |
| CN105097293A (en) | Lithium pre-embedding method of negative electrode of lithium ion capacitor | |
| CN113106515B (en) | Preparation method of corrosion-resistant coating on surface of metal material, product and application thereof | |
| US9478793B2 (en) | Process of preparing a chemically pre-formed (CPF) iron negative electrode with oxidizing compounds | |
| CN109859949B (en) | Method for reducing leakage current of medium-high voltage formed foil | |
| CN113745675A (en) | Zinc electrode protected by negative electricity skeleton hydrogel as modification layer and preparation method thereof | |
| CN110983412B (en) | Application of hard aluminum oxide film prepared based on in-situ generation method in aluminum-shell lithium battery insulation sealing | |
| CN110233059B (en) | Coaxial linear super capacitor and preparation method thereof | |
| CN112080774A (en) | Surface treatment method for aluminum alloy rotor flange shell of offshore wind plant | |
| US7867652B2 (en) | Surface treatment for metal-polymer laminated electrochemical cell package | |
| CN110790253B (en) | Preparation method and application of silkworm cocoon derived carbon/MXene/manganese dioxide composite material | |
| RU2611722C1 (en) | Method of production of non-polarizable electrode for electrochemical capacitor | |
| CN108258248B (en) | Long-life composite grid suitable for lead storage battery and preparation method thereof | |
| CN114695866B (en) | Preparation method of double transition metal oxide negative electrode material of lithium ion battery | |
| CN103050731A (en) | Preparation method for insulating coating of lithium ion battery case and lithium ion battery | |
| CN113436907B (en) | Geopolymer-based supercapacitor and preparation method thereof | |
| CN113113558B (en) | Three-electrode system of lithium ion battery and preparation method thereof | |
| KR20110000236A (en) | A method of a secondary battery and collector by electric etching | |
| CN110534784B (en) | Preparation method of high-energy-density low-cost alkaline flow battery system | |
| CN113394408A (en) | Long-life light composite positive grid and preparation method thereof, and positive electrode plate and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201211 Address after: Room 408 and 409, west block, building 1, No. 118, Zhenhua Road, Futian District, Shenzhen City, Guangdong Province Applicant after: Guoyan Xinneng (Shenzhen) Power Technology Co.,Ltd. Address before: No.18, Zone C, Gangwan Industrial Zone, Dandong Border Economic Cooperation Zone, Liaoning Province Applicant before: DANDONG SICHENG TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210226 Address after: 2105, block a, phase I, Sunshine Technology Innovation Center, Nanxin Road, Nanshan community, Nanshan street, Nanshan District, Shenzhen, Guangdong 518000 Applicant after: Guoyan Xinneng (Shenzhen) Technology Co.,Ltd. Address before: Room 408 and 409, west block, building 1, No. 118, Zhenhua Road, Futian District, Shenzhen City, Guangdong Province Applicant before: Guoyan Xinneng (Shenzhen) Power Technology Co.,Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |