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A Six-Stage Formation Process of High Capacity and Low Leakage Medium Voltage Anode Foil

A low-leakage, anode foil technology, applied in circuits, capacitors, electrical components, etc., can solve the problems of poor mechanical properties, large leakage current, affecting the application range and service life of products, and achieve excellent surface performance, stable performance and cost. low effect

Active Publication Date: 2021-08-03
石河子众金电极箔有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anode foil made of citric acid and ammonium citrate system has a large leakage current and poor mechanical properties, which affects the application range and service life of the product

Method used

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  • A Six-Stage Formation Process of High Capacity and Low Leakage Medium Voltage Anode Foil
  • A Six-Stage Formation Process of High Capacity and Low Leakage Medium Voltage Anode Foil
  • A Six-Stage Formation Process of High Capacity and Low Leakage Medium Voltage Anode Foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] (1) Primary feed: the conductive silver roller supplies power to the primary and secondary forming feeds.

[0100] (2) Pretreatment (i.e. boiling in high temperature water): soak the foil in water above 97°C for 4 minutes.

[0101] (3) Primary formation: The primary formation is carried out in a primary formation solution containing 2.7 g / L ammonium adipate and 1.2 g / L adipic acid. Current density 80mA / cm 2 , voltage 80V, formation time 2min40s, processing temperature 90℃.

[0102] (4) Secondary formation: In the secondary formation solution containing 2.7g / L ammonium adipate and 1.2g / L adipic acid, carry out secondary formation. Current density 80mA / cm 2 , the voltage is 120V, the formation time is 2min40s, and the processing temperature is 90°C.

[0103](5) Tertiary chemical conversion: In a tertiary chemical conversion solution containing 2.7 g / L ammonium adipate and 1.2 g / L adipic acid, the tertiary chemical conversion was carried out. Current density 80mA / cm ...

Embodiment 2

[0119] (1) Primary feed: the conductive silver roller supplies power to the primary and secondary forming feeds.

[0120] (2) Boiling in high temperature water: soak the foil in water above 97°C for 4 minutes.

[0121] (3) Primary formation: use a chemical formation solution with a concentration of 2g / L ammonium dihydrogen phosphate, 1.0g / L citric acid, 1.0g / L triammonium citrate, and 0.05g / L sodium hypophosphite to carry out a primary chemical reaction. Formation, current density 80mA / cm 2 , voltage 80V, formation time 2min40s, processing temperature 90℃.

[0122] (4) Secondary formation: use a concentration of 2g / L ammonium dihydrogen phosphate, 1.0g / L citric acid, 1.0g / L triammonium citrate, and 0.05g / L sodium hypophosphite to carry out secondary formation. Formation, current density 80mA / cm 2 , the voltage is 120V, the formation time is 2min40s, and the processing temperature is 90°C.

[0123] (5) Tertiary formation: Use a formation solution with a concentration of 0.7...

Embodiment 3

[0141] Formation method is the same as embodiment 2, the difference is that 1# sintering furnace:

[0142] 1# Sintering Furnace: The firing temperature is 450°C, and the firing time is 30s.

[0143] At 218V, the foil capacity is 3.02μF / cm under the above anodizing conditions 2 , the withstand voltage value is 215V, the bending time is 150 times, the boost time after 1h boiling is 35s, and the leakage current is 0.34mA for 1h.

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Abstract

The invention relates to a six-stage formation process of a high-capacity, low-leakage medium-voltage anode foil. A six-stage formation process for high-capacity and low-leakage medium-voltage anode foil, comprising the following steps: (1) pretreatment; (2) one-stage formation; (3) two-stage formation; (4) three-stage formation; (5) (6) Sintered treatment 1; (7) Phosphoric acid treatment 1; (8) Five-level chemical formation; (9) Six-level chemical formation; (10) Sintered treatment 2; (11) Back-end repair 1; ( 12) Phosphoric acid treatment 2; (13) Back-end repair 2; (14) Burn-in treatment 3; (15) Back-end repair 2; (16) Post-treatment. The six-stage formation process of a high-capacity and low-leakage medium-voltage anode foil described in the present invention adopts a six-stage formation process, which has the advantages of high production capacity and low cost, and the prepared medium-voltage anode foil has high capacity, low leakage, and water resistance. It has the advantages of strong synthesizing ability and good mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of anode foils, and in particular relates to a six-stage formation process of high-capacity, low-leakage medium-voltage anode foils. Background technique [0002] Anode foil for aluminum electrolytic capacitors (hereinafter referred to as anode foil) is a key raw material for the manufacture of aluminum electrolytic capacitors. The trend of high capacity and miniaturization of aluminum electrolytic capacitors puts forward higher requirements on the capacity and stability of the anode foil. At the present stage, the medium-voltage chemical formation process mainly adopts adipic acid and ammonium adipate-based processes, and the capacity of the prepared anode foil can no longer meet the current market demand. At the same time, the leakage current of the anode foil produced by this process is high, which seriously affects the use of capacitors. life. [0003] Adipic acid and ammonium adipate series chemical s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/055
CPCH01G9/055
Inventor 林颖王江波黄予涵祝进力秦鹏陆伟杨文峰陈小元
Owner 石河子众金电极箔有限公司