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Electrolyte for high voltage bolt capacitor and preparation method thereof

An electrolyte and capacitor technology, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problem of high cost, achieve stable performance, reduce equipment size, and reduce costs.

Active Publication Date: 2022-07-29
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 with an amide structure, ethylene glycol, water and boric acid, the reaction was stirred at 160° C. for 3 h to obtain a flash fire elevating agent.

[0026] After mixing the main solvent and auxiliary solvent, heat to 140 °C, add flash fire enhancer for 60 nin, then cool down to 110 °C, add main solute and auxiliary solute for 60 nin, then cool to 90 °C, add hydrogen remover for 30 nin. After the preparation is completed, it is cooled to below 60° C. to obtain an electrolyte solution for a high-voltage capacitor. By changing the types and parts by weight of each component, Examples 1-4 were obtained. The specific types of each component of the electrolyte and the added weight parts are shown in Table 1.

[0027] Among them, polymeric carboxylic acid ammonium salt, 8,13-dimethyl-8,12-diene-eicosadicarboxylate ammonium salt, polyvinyl alcohol with amide structure and common polyvinyl alcohol were all purchased from Wuhan Haispring Technolog...

Embodiment 5

[0039] Example 5 did not add polymeric carboxylate ammonium salt, Example 6 did not add 8,13-dimethyl-8,12-diene-eicosodicarboxylate ammonium salt, the conductivity of the obtained electrolyte decreased, and flash fire occurred. Voltage rises.

Embodiment 7

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

[0041] In Examples 8-10, the reaction temperature was changed, the conductivity of the electrolyte was increased, and the flash voltage was decreased. Conductivity and flash voltage are the main performance parameters of electrolyte, but in general, there is an inverse relationship between conductivity and flash voltage. When the electrical conductivity is high, the flash fire voltage will decrease accordingly; while increasing the flash fire voltage, the electrical conductivity will decrease. The conductivity affects the loss of the product, and the high conductivity electrolyte can reduce the loss of the capacitor and improve the ability to withstand ripple current. If it has a higher flash voltage, the stability of the electrolyt...

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Abstract

The present invention provides an electrolyte for high-voltage capacitors. By selecting polymeric carboxylic acid ammonium salt and 8,13-dimethyl-8,12-diene-eicosadicarboxyammonium salt as solutes, and adopting an amide structure polymer The reaction product of vinyl alcohol and ethylene glycol is used as a flash fire enhancer, which can increase the flash fire voltage. The electrolyte can withstand 600V high voltage, suitable for use under conditions of ‑25℃~+85℃, and has stable performance. And can reduce the number of capacitors used in series and parallel, that is, greatly reduce the cost and reduce the size of the equipment.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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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