Title:
PRE-TREATMENT METHOD FOR INCREASING PORE-GENERATION DENSITY OF ELECTRODE FOIL FOR ALUMINUM ELECTROLYTIC CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2019/085387
Kind Code:
A1
Abstract:
Disclosed by the present invention is a pre-treatment method for increasing the pore-generation density of an electrode foil for an aluminum electrolytic capacitor, the method comprising the following steps: pre-treating, washing with water a first time, performing pore-generating treatment, performing intermediate treatment, washing with water a second time, performing pore-enlarging treatment, washing with water a third time, performing chemical cleaning, washing with water a fourth time, and drying. The present invention improves the uniformity of the distribution of etch pits on a surface of aluminum foil by means of improving pre-treatment conditions, reduces an amount by which aluminum foil is thinned, and finally obtains an electrode foil for a medium and high-voltage aluminum electrolytic capacitor, which has uniform pore distribution, uniform pore length and for which the thickness of a residual core layer is uniform, greatly increasing capacity and strength after formation.
Inventors:
YAN JIXIN (CN)
CHEN JIAN (CN)
WANG JIANZHONG (CN)
GU JIANPING (CN)
ZHAO YUFEI (CN)
MAO HUIMIN (CN)
WU CHUNCHUN (CN)
CHEN JIAN (CN)
WANG JIANZHONG (CN)
GU JIANPING (CN)
ZHAO YUFEI (CN)
MAO HUIMIN (CN)
WU CHUNCHUN (CN)
Application Number:
PCT/CN2018/081589
Publication Date:
May 09, 2019
Filing Date:
April 02, 2018
Export Citation:
Assignee:
NANTONG HAIXING ELECTRONICS LLC (CN)
NANTONG HAIYI ELECTRONICS CO LTD (CN)
NANTONG HAIYI ELECTRONICS CO LTD (CN)
International Classes:
H01G9/055
Foreign References:
CN107658135A | 2018-02-02 | |||
CN105551805A | 2016-05-04 | |||
CN101425390A | 2009-05-06 | |||
CN101950688A | 2011-01-19 |
Other References:
ZOU, TAO: "Research of Dc Etching of Extending Surface Area of Aluminium Foil for High-voltage Electrolytic Capacitor", CHINESE MASTER'S THESES, ENGINEERING SCIENCE AND TECHNOLOGY I., no. 6, 15 June 2011 (2011-06-15), pages 19 - 24
Attorney, Agent or Firm:
NANJING ZHENGLIAN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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