A kind of electrolyte solution for 650-700v aluminum electrolytic capacitor

An aluminum electrolytic capacitor and electrolyte technology, applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problem of immature capacitors, and achieve the effects of small changes in conductivity, good high temperature stability, and good conductivity

Active Publication Date: 2020-12-29
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, in order to meet the needs of new equipment, it is necessary to develop aluminum electrolytic capacitors with a working voltage of 650-700V and above 700V to reduce the number of series connections. The demand for equipment, while domestic capacitors generally exceeding 500V are still in an immature stage, especially for the development of products with operating voltages above 700V, it is necessary to develop corresponding high-stable electrolytes first

Method used

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  • A kind of electrolyte solution for 650-700v aluminum electrolytic capacitor
  • A kind of electrolyte solution for 650-700v aluminum electrolytic capacitor
  • A kind of electrolyte solution for 650-700v aluminum electrolytic capacitor

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Embodiment Construction

[0035]The following are preferred embodiments of the present invention, and the protection of the present invention is not limited to the following preferred embodiments. It should be pointed out that for those skilled in the art, a number of modifications and improvements made on the basis of the inventive concept are all within the protection scope of the present invention.

[0036]Synthesis of ammonium salt of polymer of formula (I)

[0037]1) Add undecylenic acid (18.4g), vinyl n-butyl ether (20.0g), acrylic acid (5.0g) into a 1000mL round bottom flask, and add the initiator benzoyl peroxide (0.48g) and solvent at the same time N,N-dimethylformamide (200g);

[0038]2) Stir for 30 minutes, then transfer it to an oil bath and raise the temperature to 80°C for 24 hours;

[0039]3) Add an equal volume of water dropwise to the reaction kettle, continue to stir for 4 hours and then filter, wash the filter cake with water, and dry to obtain the formula (I) high molecular polymer (30.9g), the total...

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Abstract

The invention provides a working electrolyte used for a 650-700V aluminium electrolytic capacitor. The electrolyte comprises a solute, a main solvent, auxiliary solvents and other additives, wherein the solute is a high-molecular polymer ammonium salt as shown in the formula (I), and has the molecular weight distribution range of 50000-100000. By virtue of the electrolyte formed by the solute which is the high-molecular polymer ammonium salt as shown in the formula (I), the spark voltage of the capacitor is obviously improved; and the obtained capacitor is relatively high in electrical conductivity, and after high-temperature long-time test, the electrical conductivity is slightly changed, higher high-temperature stability is achieved, and use requirement of the super-high-voltage aluminium electrolytic capacitor of 650V or 700V or above can be satisfied.

Description

Technical field[0001]The invention relates to the technical field of capacitor electrolytes, in particular to an electrolyte for 650-700V aluminum electrolytic capacitors and a preparation method thereof.Background technique[0002]Aluminum electrolytic capacitors are indispensable components for various electronic product terminals and play a vital role in industrial, power supply and other applications. In recent years, with the rapid development of small size and high stable performance technologies in new technology fields such as high-voltage inverters, electric vehicles, wind power generation and photovoltaic power generation new energy, manufacturers have proposed capacitors withstand high voltage, large ripple current, and The requirement of long life. The working electrolyte of a capacitor is called the "blood" of the capacitor. It not only serves as the actual cathode of the capacitor, but also plays an important role in providing oxygen ions and repairing the anodic oxide f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/035C08F216/14C08F220/06C08F220/64
CPCC08F216/14H01G9/035C08F220/06C08F220/64
Inventor 余意何凤荣
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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