Electrolyte used for 650-700V aluminium electrolytic capacitor

A technology of aluminum electrolytic capacitors and electrolytes, which is applied in the direction of electrolytic capacitors, capacitors, circuits, etc., can solve the problems of immature capacitors, etc., and achieve the effects of small changes in conductivity, good conductivity, and high temperature stability

Active Publication Date: 2018-10-16
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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  • Electrolyte used for 650-700V aluminium electrolytic capacitor
  • Electrolyte used for 650-700V aluminium electrolytic capacitor
  • Electrolyte used for 650-700V aluminium electrolytic capacitor

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Embodiment Construction

[0035] What is described below is the preferred implementation of the present invention, and the protection of the present invention is not limited to the following preferred implementation. It should be pointed out that for those skilled in the art, some modifications and improvements made on the basis of this inventive concept all belong to the protection scope of the present invention.

[0036] The synthesis of formula (I) polymer ammonium salt

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

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

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

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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 electrolytes for 650-700V aluminum electrolytic capacitors and a preparation method thereof. Background technique [0002] Aluminum electrolytic capacitors are essential components in the terminals of various electronic products, and play a vital role in applications such as industry and power supply. In recent years, with the rapid development of small-volume, high-stable performance technologies in new technology fields such as high-voltage inverters, electric vehicles, wind power, and photovoltaic power generation, manufacturers have proposed high-voltage, large-ripple current, and high-voltage capacitors for capacitors. Long life requirements. The working electrolyte of the 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 anod...

Claims

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Application Information

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Patent Type & Authority Applications(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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