CN104480520B - Manufacturing method of producing high-purity cathode foil by virtue of electrochemical corrosion - Google Patents
Manufacturing method of producing high-purity cathode foil by virtue of electrochemical corrosion Download PDFInfo
- Publication number
- CN104480520B CN104480520B CN201410678227.1A CN201410678227A CN104480520B CN 104480520 B CN104480520 B CN 104480520B CN 201410678227 A CN201410678227 A CN 201410678227A CN 104480520 B CN104480520 B CN 104480520B
- Authority
- CN
- China
- Prior art keywords
- corrosion
- grade
- electrochemical corrosion
- aluminum chloride
- temperature
- 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
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to a manufacturing method of producing a high-purity cathode foil by virtue of electrochemical corrosion and belongs to the technical field of manufacturing aluminum foils. The manufacturing method comprises the following technological process steps: pretreatment, primary corrosion, multi-stage corrosion, middle treatment, post-treatment, foil rewinding by drying and the like, wherein the multi-stage corrosion is the core of the whole process, is the key process for high specific capacitance and is a process of continuous electrolytic corrosion by virtue of different current densities, generally corrosion by virtue of 3-6 different alternating currents; during the multi-stage corrosion, the current densities change from small to large, the phenomena of powder dropping and polarization are avoided in the continuous electrochemical corrosion, and the production efficiency is relatively high. With the adoption of the manufacturing method, the produced high-purity cathode foil is low in content of impurity, the phenomenon of leakage current is relatively reduced as for an electrolytic capacitor, the production process is simplified, and the technological process is reduced due to the continuous electrochemical corrosion.
Description
Technical field
The present invention relates to a kind of manufacture method of anode foil is and in particular to a kind of electrochemical corrosion produces high-purity anode foil
Manufacture method, belong to aluminium foil manufacturing technology field.
Background technology
, since nineteen thirty appearance, existing over half a century so far, because of its excellent performance, reliable for aluminium electrolutic capacitor
The advantages such as quality, ripe technique, cheap cost and be widely used in Power capacitor industry, so that it is occupied in radio component
Suitable proportion.It is estimated that the output value of aluminum electrolytic capacitor accounts for more than the 50% of the same type capacitor output value.
With the fast development of electronic technology, the increase further of the packing density of complete electronic set and integration degree, right
Aluminium electrolutic capacitor proposes new requirement, in the urgent need to aluminium electrolutic capacitor being reduced further with volume, improving electrical property, carry
High reliability.The drastically expansion of the particularly computer system market such as communication product, computer, household electrical appliances, to aluminium electroloysis electricity of high quality and at a reasonable price
The demand of container also steeply rises, and aluminium electrolutic capacitor is just low towards miniaturization, high capacity, long lifetime, environmental protection, high frequency
The high-level direction of the high performance such as impedance is developed；Realize aluminium electrolutic capacitor Fabrication of High Specific Capacitance, the key technology of miniaturization is by straight
Stream corrosion generates the specific surface area that substantial amounts of tunnel type square hole to improve aluminium foil, therefore, alminium electrolytic condenser in surface of aluminum electrode foil
Also when the river rises the boat goes up for the electrode foil of device critical material, develops at a terrific speed, and the manufacture to electrode foil it is also proposed higher skill
Art and prescription.
Aluminium electrolutic capacitor is a kind of capacitor having both positive and negative polarity, and main electrodes are all manufactured by aluminium foil.Aluminium electroloysis electricity
Negative electrode in container be substantially electrolyte paste body, anode foil be again negative electrode draw paper tinsel, so in Power capacitor industry custom handle
Anode foil is mixed with Cathode Foil.The mode of cathode foil corrosion has chemical attack and electrochemical corrosion, and impurity is mainly used in chemical attack
（Cu and Fe）The higher aluminium foil of content is raw material, and the copper in material and ferrum element are the cores corroded, and can accelerate hydrochloric acid
Deng the corrosion rate to aluminium foil, provide basis for chemical attack, form graphitic corrosion.But, due to chemical etching technology system
There is Cu in the anode foil surface made2+And Fe3+Comparision contents high, Cu2+、Fe3+Constitute micro cell with Al in electrolyte solution
And it is produced from corrosion, destroying the surface texture of paper tinsel, thus causing the rise of electrolysis condenser leakage current, reducing its service life.
Electrochemical corrosion is mainly raw material with highly purified aluminium foil, and in material, the anti-corrosion difference of different crystal faces is the core of corrosion, these
The corrosion resistance order of different crystal faces is：{ 100 } ＞ { 110 } ＞ { 112 } ＞ { 123 }, in the presence of alternating current, anode is excellent for aluminium foil
The first crystal face of corrosion corrosion resistance difference（As { 123 }）, and cathode reaction occurs mainly in the good crystal face of corrosion resistance（As { 100 }）, cloudy
Pole is reacted for forming hydroxide oxide-film, and this corrosion constantly carries out generating graphitic corrosion.Such high-purity anode foil
Impurity seldom, fundamentally solves Cu2+、Fe3+Cause the rise of condenser leakage current Deng impurity, improve the quality of capacitor.
All achieve larger progress with regard to the domestic and international technical research of anode foil, but the document report of related anode foil is relatively
Few, particularly electrochemical corrosion production anode foil is just less.It is reported that domestic main based on chemical attack, and electrochemistry is rotten
Erosion is more rare.Electrochemical corrosion anode foil technology（List of references：1. Chinese patent, application number：CN200610124354；2.
Chinese patent, application number：CN200810029708.4）It is rotten through alternating current using the pure aluminium cathode foil of aluminium content >=99.4%
Directly carry out anodized after erosion, form layer oxide film thin film in corrosion surface；Electrochemical corrosion anode foil technology（Ginseng
Examine document：3. Chinese patent, application number：CN200610124355.7）Be with 5 ~ 15% hydrochloric acid, 1 ~ 4% aluminum chloride, 30 ~
100ppm hexamethylenamine and N, the mixture of N- dimethyl sulfourea（Mass ratio 5:1）The electrolytic etching liquid of composition, corrosion temperature exists
Change in the range of 40 ~ 65 DEG C, applying electric current density is 0.5 ~ 1.0A/cm2Alternating current.Its technological process is：Pre-treatment, friendship
Stream galvano-cautery, middle process, stabilization are processed, and wherein exchange electrical corrosion is：The washing of one-level alternating current burn into, middle process, water
Wash, two grades of washings of alternating current burn into, middle process, washing, three-levels exchange galvano-cautery.Exchange electrical corrosion technique is complex
Enter, with after washing, the generation that galvano-cautery is easy to local polarisation, and this technique is complex at present；Low production efficiency.
Content of the invention
The invention aims to overcoming existing production high-purity anode foil technique complex and low production efficiency
Problem, provides a kind of electrochemical corrosion to produce the manufacture method of high-purity anode foil, reaches Simplified flowsheet and improve production efficiency
Purpose.
To achieve these goals, the technical solution adopted in the present invention is：
More than 99.8% fine aluminium system aluminium foil is carried out after pre-treatment oil removing oxide film dissolving surface clean, put into hydrochloric acid be 3 ~
6mol/L, aluminum chloride apply electric current density 0.15 ~ 0.25A/cm in 20 ~ 60 DEG C of the corrosive liquid for 0.5 ~ 1.5mol/L2Carry out
Primary corrosion, then carries out surface chemistry corrosion treatmentCorrosion Science, be then placed in total acidity be 1.5 ~ 6.5mol/L, aluminum chloride be 0.3 ~
In 2.0mol/L and additive 20 ~ 70 DEG C of the corrosive liquid for 0.1 ~ 3%, carry out multistage corrosion treatmentCorrosion Science, applying electric current density is：
1st grade of 0.02 ~ 0.09A/cm2, the 2nd grade of 0.06 ~ 0.13 A/cm2, 3rd level 0.08 ~ 0.16 A/cm2, the 4th grade 0.11 ~ 0.20
A/cm2, the 5th grade of 0.14 ~ 0.23 A/cm2, the 6th grade of 0.18 ~ 0.26 A/cm2, carry out being classified corrosion 20 ~ 80s, in finally carrying out
Process and post processing.
Described pre-treatment：Reclaiming primary corrosion overflowing liquid is hydrochloric acid 3 ~ 6mol/L, aluminum chloride 0.5 ~ 1.5mol/L, temperature
For 20 ~ 60 DEG C, action time：30~180s；Described primary corrosion is hydrochloric acid 3 ~ 6mol/L, aluminum chloride 0.5 ~ 1.5mol/L, temperature
Spend for 20 ~ 60 DEG C, applying electric current density is：0.15~0.25A/cm2, action time：5~20s；At described surface chemistry corrosion
Reason corrosive liquid be made up of hydrochloric acid 3 ~ 8mol/L, aluminum chloride 1.0 ~ 2.8mol/L, at 30 ~ 60 DEG C of temperature, action time 50 ~ 180s；
The etchant solution of described multistage corrosion treatmentCorrosion Science is by hydrochloric acid 2 ~ 6mol/L, sulphuric acid 0.1 ~ 1mol/L, aluminum chloride 0.3 ~ 2.0mol/L
Form with additive 0.1 ~ 3%, treatment temperature is 20 ~ 70 DEG C, action time is 20 ~ 80s；Described middle processing solution is by nitric acid
0.1 ~ 2mol/L, sulphuric acid 0.2 ~ 4mol/L form, and the treatment temperature of middle treatment fluid is 20 ~ 60 DEG C, and action time is 30 ~ 180s；
Described post processing adopt concentration be 1 ~ 8% phosphoric acid and phosphate solution, at a temperature of 30 ~ 80 DEG C, action time be 10 ~
180s；Described additive is oxalic acid, acetic acid, thiourea or sulfate；Described additive level is 0.1 ~ 3%.
The invention has the beneficial effects as follows：The present invention has very strong superiority, shows specific volume, outward appearance, impurity, mechanicalness
Can etc. aspect all preferably it is adaptable in high request electrolysis condenser element and some high-end products series.
1. select fine aluminium system aluminium foil（Reach more than 99.8%）The impurity content that electrochemical corrosion produces high-purity anode foil is low,
For electrolysis condenser, the phenomenon of leakage current can be relatively reduced；
Each of 2. production technology more simplifies, seriality electrochemical corrosion, reduces technological process, and whole technique
Step
Electrolyte has preferably proportioning mode；
3. multistage corrosion energy improve production efficiency, is the critical process obtaining Fabrication of High Specific Capacitance.
Specific embodiment
Below by example, the present invention is described in further details, these examples are only used for the present invention is described, do not limit
The scope of the present invention processed；
Embodiment 1
By fine aluminium system aluminium foil（Reach more than 99.8%）Carry out pre-treatment（Primary corrosion overflowing liquid）Temperature is 20 DEG C, during effect
Between：After 90s routine oil removing oxide film dissolving surface clean, put into total acidity be 3.0mol/L, aluminum chloride be 60 DEG C of 0.5mol/L
Corrosive liquid in, applying electric current density be 0.15A/cm2Under conditions of primary corrosion 10s, then carry out at surface chemistry corrosion
Reason temperature is 30 DEG C, action time 80s, be then placed in total acidity be 3.0mol/L, aluminum chloride be 60 DEG C of 0.5mol/L of corruption
In erosion liquid, apply electric current density：1st grade of 0.02A/cm2, the 2nd grade of 0.05A/cm2, 3rd level 0.08A/cm2, the 4th grade of 0.11A/
cm2, the 5th grade of 0.13A/cm2, the 6th grade of 0.18A/cm2, carry out classification corrosion 50s, finally carry out middle treatment temperature and be 60 DEG C, make
With the time be 50s and post-processing temperature is 70 DEG C, and action time is 40s.
Embodiment 2
By fine aluminium system aluminium foil（Reach more than 99.8%）Carry out pre-treatment（Primary corrosion overflowing liquid）Temperature is 30 DEG C, during effect
Between：After 80s routine oil removing oxide film dissolving surface clean, put into total acidity be 4.0mol/L, aluminum chloride be 50 DEG C of 0.8mol/L
Corrosive liquid in, applying electric current density be 0.18A/cm2Under conditions of primary corrosion 10s, then carry out at surface chemistry corrosion
Reason temperature is 40 DEG C, action time 70s, be then placed in total acidity be 3.5mol/L, aluminum chloride be 50 DEG C of 1.2mol/L of corruption
In erosion liquid, apply electric current density：1st grade of 0.04A/cm2, the 2nd grade of 0.07A/cm2, 3rd level 0.09A/cm2, the 4th grade of 0.11A/
cm2, the 5th grade of 0.15A/cm2, the 6th grade of 0.18A/cm2, carry out classification corrosion 45s, finally carry out middle treatment temperature and be 50 DEG C, make
With the time be 60s and post-processing temperature is 60 DEG C, and action time is 50s.
Embodiment 3
By fine aluminium system aluminium foil（Reach more than 99.8%）Carry out pre-treatment（Primary corrosion overflowing liquid）Temperature is 40 DEG C, during effect
Between：After 70s routine oil removing oxide film dissolving surface clean, put into total acidity be 5.0mol/L, aluminum chloride be 40 DEG C of 1.0mol/L
Corrosive liquid in, applying electric current density be 0.20A/cm2Under conditions of primary corrosion 10s, then carry out at surface chemistry corrosion
Reason temperature is 50 DEG C, action time 60s, be then placed in total acidity be 4.0mol/L, aluminum chloride be 40 DEG C of 0.7mol/L of corruption
In erosion liquid, apply electric current density：1st grade of 0.05A/cm2, the 2nd grade of 0.07A/cm2, 3rd level 0.09A/cm2, the 4th grade of 0.12A/
cm2, the 5th grade of 0.15A/cm2, the 6th grade of 0.20A/cm2, carry out classification corrosion 40s, finally carry out middle treatment temperature and be 40 DEG C, make
With the time be 70s and post-processing temperature is 50 DEG C, and action time is 60s.
Embodiment 4
By fine aluminium system aluminium foil（Reach more than 99.8%）Carry out pre-treatment（Primary corrosion overflowing liquid）Temperature is 30 DEG C, during effect
Between：After 60s routine oil removing oxide film dissolving surface clean, put into total acidity be 6.0mol/L, aluminum chloride be 30 DEG C of 1.2mol/L
Corrosive liquid in, applying electric current density be 0.22A/cm2Under conditions of primary corrosion 10s, then carry out at surface chemistry corrosion
Reason temperature is 60 DEG C, action time 50s, be then placed in total acidity be 4.5mol/L, aluminum chloride be 30 DEG C of 1.1mol/L of corruption
In erosion liquid, apply electric current density：1st grade of 0.05A/cm2, the 2nd grade of 0.09A/cm2, 3rd level 0.12A/cm2, the 4th grade of 0.15A/
cm2, the 5th grade of 0.16A/cm2, the 6th grade of 0.20A/cm2, carry out classification corrosion 35s, finally carry out middle treatment temperature and be 30 DEG C, make
With the time be 80s and post-processing temperature is 40 DEG C, and action time is 70s.
The technical parameter of the multistage corrosion of table 1. embodiment and specific volume result
With upper table 1. embodiment technical parameter and specific volume, using certain producer 48 m aluminium foil domestic（Reach more than 99.8%）,
Good embodiment be total acidity be 4.5mol/L, aluminium content be 1.1mol/L, detection method, according to JCC standard, obtains 0V ratio
Rong Da about 446 F/cm2, appearance is good and good mechanical property, and decay in specific volume.
Claims (6)
1. a kind of electrochemical corrosion produce high-purity anode foil manufacture method it is characterised in that：Comprise the steps：Will
After more than 99.8% fine aluminium system aluminium foil carries out pre-treatment oil removing oxide film dissolving surface clean, putting into hydrochloric acid is 3 ~ 6mol/L, aluminum chloride
Apply electric current density 0.15 ~ 0.25A/cm in 20 ~ 60 DEG C of the corrosive liquid for 0.5 ~ 1.5mol/L2Carry out primary corrosion, then
Carry out surface chemistry corrosion treatmentCorrosion Science, be then placed in total acidity be 1.5 ~ 6.5mol/L, aluminum chloride be 0.3 ~ 2.0mol/L and interpolation
Agent is in 0.1 ~ 3% 20 ~ 70 DEG C of corrosive liquid, carries out multistage corrosion treatmentCorrosion Science, applies electric current density and is：1st grade 0.02 ~
0.09A/cm2, the 2nd grade of 0.06 ~ 0.13 A/cm2, 3rd level 0.08 ~ 0.16 A/cm2, the 4th grade of 0.11 ~ 0.20 A/cm2, the 5th grade
0.14~0.23 A/cm2, the 6th grade of 0.18 ~ 0.26 A/cm2, carry out being classified corrosion 20 ~ 80s, finally carry out middle process and rear place
Reason；Described pre-treatment：Primary corrosion overflowing liquid is hydrochloric acid 3 ~ 6mol/L, aluminum chloride 0.5 ~ 1.5mol/L, and temperature is 20 ~ 60
DEG C, action time：30~180s.
2. a kind of electrochemical corrosion according to claim 1 produce high-purity anode foil manufacture method it is characterised in that：
Described primary corrosion is hydrochloric acid 3 ~ 6mol/L, aluminum chloride 0.5 ~ 1.5mol/L, and temperature is 20 ~ 60 DEG C, applies electric current density and is：
0.15~0.25A/cm2, action time：5~20s.
3. a kind of electrochemical corrosion according to claim 1 produce high-purity anode foil manufacture method it is characterised in that：
Described middle processing solution is made up of nitric acid 0.1 ~ 2mol/L, sulphuric acid 0.2 ~ 4mol/L, and the treatment temperature of middle treatment fluid is 20 ~ 60
DEG C, the time is 30 ~ 180s.
4. a kind of electrochemical corrosion according to claim 1 produce high-purity anode foil manufacture method it is characterised in that：
Described post processing adopts the phosphoric acid that concentration is 1 ~ 8% and phosphate solution, at a temperature of 30 ~ 80 DEG C, acts on 10 ~ 180s.
5. a kind of electrochemical corrosion according to claim 1 produce high-purity anode foil manufacture method it is characterised in that：
Described additive is oxalic acid, acetic acid, thiourea or sulfate.
6. a kind of electrochemical corrosion described in claim 1 produce high-purity anode foil manufacture method it is characterised in that：Described
Surface chemistry corrosion treatmentCorrosion Science corrosive liquid be made up of hydrochloric acid 3 ~ 8mol/L, aluminum chloride 1.0 ~ 2.8mol/L, at 30 ~ 60 DEG C of temperature,
Effect 50 ~ 180s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678227.1A CN104480520B (en) | 2014-11-24 | 2014-11-24 | Manufacturing method of producing high-purity cathode foil by virtue of electrochemical corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678227.1A CN104480520B (en) | 2014-11-24 | 2014-11-24 | Manufacturing method of producing high-purity cathode foil by virtue of electrochemical corrosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104480520A CN104480520A (en) | 2015-04-01 |
| CN104480520B true CN104480520B (en) | 2017-02-22 |
Family
ID=52755119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410678227.1A Active CN104480520B (en) | 2014-11-24 | 2014-11-24 | Manufacturing method of producing high-purity cathode foil by virtue of electrochemical corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104480520B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788866A (en) * | 2016-04-10 | 2016-07-20 | 江苏荣生电子有限公司 | Middle-and-high-voltage electrode foil manufacturing method based on combination of electrochemical corrosion and chemical corrosion |
| CN106098378B (en) * | 2016-06-27 | 2018-02-13 | 江苏荣生电子有限公司 | A kind of device for manufacturing large aperture high-voltage high specific capacitance energy storage paper tinsel |
| CN107740177A (en) * | 2017-10-09 | 2018-02-27 | 山西沃特海默新材料科技股份有限公司 | A kind of electrochemical heat corrosion preparation method of micropore battery aluminium foil |
| CN110887779A (en) * | 2019-11-28 | 2020-03-17 | 新疆众和股份有限公司 | Method for detecting initial corrosion state of high-voltage anode aluminum foil |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4432846A (en) * | 1982-12-10 | 1984-02-21 | National Steel Corporation | Cleaning and treatment of etched cathode aluminum capacitor foil |
| CN100442406C (en) * | 2003-05-15 | 2008-12-10 | 扬州宏远电子有限公司 | Etching technique of hard foil |
| CN101154508B (en) * | 2006-09-26 | 2010-06-16 | 横店集团东磁有限公司 | Four-stage manufacturing method for electrode foil of high-pressure aluminum electrolytic capacitor |
| CN101030488A (en) * | 2006-12-22 | 2007-09-05 | 东莞市东阳光电容器有限公司 | Production of electrolytic capacitor pure aluminum negative-electrode foil |
| KR100889488B1 (en) * | 2007-11-12 | 2009-03-19 | 한국제이씨씨(주) | Manufacturing method of etchant based on alcl3 and hydrochloric acid electrolyte using ac electrolytic etching |
| CN101275269B (en) * | 2008-04-22 | 2010-09-22 | 日丰（清远）电子有限公司 | Etching process for aluminum foil for electrolytic capacitor |
| CN101425378B (en) * | 2008-07-24 | 2011-08-17 | 东莞市东阳光电容器有限公司 | Mixed production method for electrolytic capacitor fine aluminum cathode foil corrosion and anodic oxidation |
| CN101503801B (en) * | 2009-03-30 | 2010-10-20 | 日丰（清远）电子有限公司 | Aluminum foil corrosion technique for electrolytic capacitor |
-
2014
- 2014-11-24 CN CN201410678227.1A patent/CN104480520B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104480520A (en) | 2015-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105097286B (en) | A kind of caustic solution of super-pressure energy storage material | |
| CN104480520B (en) | Manufacturing method of producing high-purity cathode foil by virtue of electrochemical corrosion | |
| CN101425390B (en) | Medium high voltage anode aluminum foil corrosion method | |
| CN103187176B (en) | A kind of etching process of anode aluminum foil of electrolytic capacitor | |
| CN108538600A (en) | A kind of aluminium electroloysis mesohigh anode foils nitration mixture reaming caustic solution | |
| CN105200509B (en) | A kind of cleaning method of electron stored energy material | |
| CN101503801A (en) | Aluminum foil corrosion technique for electrolytic capacitor | |
| CN102800483B (en) | Formation processing method for reducing leaking current of low-voltage formation foil | |
| CN105788866A (en) | Middle-and-high-voltage electrode foil manufacturing method based on combination of electrochemical corrosion and chemical corrosion | |
| CN104878441B (en) | A kind of aluminium electrolutic capacitor etching process of the anode aluminium foil with tunnel branch hole | |
| CN107313108A (en) | A kind of aluminium electrolutic capacitor high voltage ultra-thin electrode foil and preparation method thereof | |
| KR20140136218A (en) | A method of a secondary battery and collector having non-etching | |
| CN108893760A (en) | A kind of production method of lithium ion collector corronil foil | |
| KR20140136220A (en) | A method of a secondary battery and collector by electric etching | |
| CN106024393A (en) | Preparation method for aluminium electrolytic capacitor based on coupling corrosion of positive electrode aluminium foil electrode reaction | |
| CN104269540A (en) | Titanium dioxide/conducting polymer/sulfur three-element composite material and secondary cell | |
| CN103646787A (en) | High-specific-volume high-flex electrode foil corrosion manufacturing method | |
| CN1805088A (en) | Preparation method of dielectric film of aluminum electrolytic capacitor | |
| CN106653398A (en) | Preparation method of flexible composite electrode material of supercapacitor | |
| CN103714974B (en) | A kind of method preparing aluminum electrolytic capacitor anode material | |
| CN115241403A (en) | MAX modified electrode plate high-efficiency electrode material and preparation method thereof | |
| CN101154508B (en) | Four-stage manufacturing method for electrode foil of high-pressure aluminum electrolytic capacitor | |
| KR20110000234A (en) | A method of a secondary battery and collector having non-etching | |
| CN102061508A (en) | Corrosion covering method of medium and high voltage electrode foil | |
| CN110164696A (en) | A kind of electrochemical corrosive process for the production of mesohigh anode foils |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 526060 Duanzhou Industrial Road, Duanzhou, Zhaoqing, Guangdong, Zhaoqing Huafeng Electronic foil Limited by Share Ltd Applicant after: Zhaoqing Huafeng Electronic Aluminum Foil Co., Ltd. Applicant after: Zhaoqing Gaoyao Huafeng Electronic aluminium foil Co., Ltd. Address before: 526060 Duanzhou Industrial Road, Duanzhou, Zhaoqing, Guangdong, Zhaoqing Huafeng Electronic foil Limited by Share Ltd Applicant before: Zhaoqing Huafeng Electronic Aluminum Foil Co., Ltd. Applicant before: GAOYAO HUAFENG ELECTRONIC ALUMINIUM FOIL CO., LTD. |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 526060 Zhaoqing Huafeng Electronic Aluminum Foil Co., Ltd. of Duanzhou Road Duanzhou Industrial City, Zhaoqing City, Guangdong Province Co-patentee after: Zhaoqing Gaoyao Huafeng Electronic aluminium foil Co., Ltd. Patentee after: Guangdong Huafeng New Energy Technology Co., Ltd. Address before: 526060 Zhaoqing Huafeng Electronic Aluminum Foil Co., Ltd. of Duanzhou Road Duanzhou Industrial City, Zhaoqing City, Guangdong Province Co-patentee before: Zhaoqing Gaoyao Huafeng Electronic aluminium foil Co., Ltd. Patentee before: Zhaoqing Huafeng Electronic Aluminum Foil Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |