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Electrolyte for high-voltage bolt capacitor and preparation method thereof

A technology of electrolyte and capacitors, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of high cost, achieve stable performance, increase flash voltage, and reduce the number of capacitors

Active Publication Date: 2021-06-11
ZHUHAI GREE XINYUAN ELECTRONICS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the market uses multiple sets of low-voltage (mostly 300V or 400V) large-capacity aluminum electrolytic capacitors in series and parallel to meet equipment needs, but the cost is relatively high

Method used

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  • Electrolyte for high-voltage bolt capacitor and preparation method thereof
  • Electrolyte for high-voltage bolt capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] After mixing polyvinyl alcohol having an amide structure, ethylene glycol, water and boric acid, the mixture was stirred and reacted at 160°C for 3 hours to obtain a flash fire enhancer.

[0026] Mix the main solvent and auxiliary solvent and heat to 140°C, add flash fire enhancer and keep warm for 60nin, then cool down to 110°C, add main solute and auxiliary solute and keep warm for 60nin, then cool down to 90°C, add hydrogen suppressant and keep warm for 30nin. After the preparation is completed, cool down to below 60°C to obtain an electrolyte solution for high-voltage capacitors. The types and parts by weight of each component were changed to obtain Examples 1-4. The specific types and weight parts of the components of the electrolyte are shown in Table 1.

[0027] Among them, polymeric carboxylate ammonium salt, 8,13-dimethyl-8,12-diene-eicosadicarboxylate ammonium salt, polyvinyl alcohol with amide structure and ordinary polyvinyl alcohol were all purchased from ...

Embodiment 5

[0039] Example 5 did not add polymerized carboxylate ammonium salt, and Example 6 did not add 8,13-dimethyl-8,12-diene-eicosadicarboxylate ammonium salt, the resulting electrolytic conductivity decreased, flash fire The voltage rises.

Embodiment 7

[0040] In Example 7, ordinary polyvinyl alcohol was used instead of polyvinyl alcohol having an amide structure, and the conductivity of the obtained electrolyte was basically the same as that of Examples 1-4, and the flashover voltage was reduced.

[0041] Examples 8-10 change the reaction temperature, the conductivity of the electrolyte increases, and the flash voltage decreases. Conductivity and flash voltage are the main performance parameters of the electrolyte, but in general, the relationship between conductivity and flash voltage is inversely proportional. If the conductivity is high, the flash voltage will decrease accordingly; while increasing the flash voltage, the conductivity will decrease. The conductivity affects the loss of the product, and the electrolyte with high conductivity can reduce the loss of the capacitor and improve the ability to withstand ripple current. If it has a higher flash voltage, it can ensure the stability of the electrolyte.

[0042] Th...

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PUM

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Abstract

According to the electrolyte for a high-voltage capacitor provided by the invention, the polymerized ammonium carboxylate and the 8, 13-dimethyl-8, 12-diene-eicosadicarboxylate ammonium salt are selected as solutes, and a reaction product of the polyvinyl alcohol with an amide structure and the ethylene glycol is adopted as a flash fire improver, so that a flash fire voltage can be improved. The electrolyte can bear a 600V high voltage, is suitable for being used under the condition of -25 DEG C to +85 DEG C, and is stable in performance. According to the present invention, the number of series-parallel capacitors at the use end can be reduced, so that the cost is greatly reduced, and the device volume can be reduced.

Description

technical field [0001] The invention relates to the technical field of bolt capacitor electrolyte, in particular to an electrolyte for a high-voltage bolt capacitor and a method for preparing the electrolyte. This electrolyte is suitable for bolt capacitors with a voltage above 600V. Background technique [0002] With the rapid development of social economy, intelligent life is becoming more and more popular, and the replacement of human labor by machines is an inevitable trend of future development. The realization of intelligent control requires vigorous development of servo drives, frequency converters, robot controllers and other equipment, and indirectly requires large-capacity and high-voltage capacitors to meet equipment requirements. It is understood that the market demand for servo drives, frequency converters, robot controllers and other equipment is huge, and large-capacity high-voltage aluminum electrolytic capacitors account for about 10% of the overall cost of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 袁伟刚马义勋史忠峰
Owner ZHUHAI GREE XINYUAN ELECTRONICS
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