Preparation method of high-voltage aluminum electrolytic capacitor, and capacitor

A technology of aluminum electrolytic capacitors and capacitors, applied in the direction of electrolytic capacitors, liquid electrolytic capacitors, capacitors, etc., can solve the problems of output power drop, module stability drop, uneven voltage division, etc.

Active Publication Date: 2021-04-16
ZHUHAI GREE XINYUAN ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the rated voltage of aluminum electrolytic capacitors has been used in electrical appliances such as 500V, 550V and other ultra-high voltage products, but aluminum electrolytic capacitors with voltages above 600V are still not mature technically.
On the use side, because the voltage is too high, it often takes 2, or 3, or even more products in series to meet the required voltage requirements. The more capacitors connected in series, the greater the impact of unfavorable factors, the most important of which are : 1) If the voltage of the module is not too high, such as within 500V, 550V, 600V, etc., if a single capacitor is used, the rated withstand voltage is insufficient, and if more than 2 capacitors are used ...

Method used

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  • Preparation method of high-voltage aluminum electrolytic capacitor, and capacitor
  • Preparation method of high-voltage aluminum electrolytic capacitor, and capacitor
  • Preparation method of high-voltage aluminum electrolytic capacitor, and capacitor

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preparation example Construction

[0076] Such as figure 2 As shown, a capacitor made by the above-mentioned high-voltage aluminum electrolytic capacitor preparation method, the capacitor includes: a core 1 that is sequentially stacked and rolled by cathode foil 6, electrolytic paper 5, and anode foil 7, and the outside of the core 1 is covered with aluminum The shell 2, the cover plate 3 connected to the opening of the aluminum shell 2, the sleeve 4 covered on the outside of the aluminum shell 2, the positive lead-out terminal 8 and the negative lead-out terminal 9 drawn from the core 1 pass through the cover plate 3. The structure design of the capacitor adopts the cathode foil with voltage, double pair of conductive foil strips, and ultrasonic spot welding to improve the current bearing capacity of the capacitor and product reliability. Secondary welding is used between the chaff strip and the lead-out terminal of the cover plate 3 to reduce the riveting resistance and improve the conductivity of the contac...

Embodiment 1

[0093] Additive 1 in embodiment 1, batching comprises by weight: 40~50 parts of ethylene glycol, 10~20 parts of water, 15~25 parts of diethylene glycol, 10~20 parts of polyethylene glycol, 5~10 parts of polyethylene Alcohol, 10-20 parts of boric acid;

[0094] The preparation steps of the additive are as follows:

[0095] First add 40-50 parts of ethylene glycol and 10-20 parts of water into the container, stir, heat to 80±5°C, and keep warm for 30±5 minutes;

[0096] Then add 15-25 parts of diethylene glycol, 10-20 parts of polyethylene glycol, and 5-10 parts of polyvinyl alcohol, stir, heat to 100±5°C, and keep warm for 30±5 minutes.

[0097] Finally, add 10 to 20 parts of boric acid into the container, stir, heat to 120±5°C, keep warm for 12±0.5 hours, and cool down to below 60°C to complete.

[0098] Further, the impregnation step: the electrolyte contains additives,

[0099] The ingredients in the additive include by weight: 40-50 parts of ethylene glycol, 15-30 parts ...

Embodiment 2

[0106]The electrolyte solution includes the following ingredients in parts by weight: 5-10 parts of trimethylamine, 3-5 parts of diethyl carbonate, 3-5 parts of ethyl methyl carbonate, 5-15 parts of sebacic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanoate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additives, 0.5-1 part of monobutyl phosphate, 0.5-2.5 parts of p-nitrobenzene Methanol, 5-15 parts of nano-silica EG solution;

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Abstract

The invention discloses a preparation method of a high-voltage aluminum electrolytic capacitor, and the capacitor. The method comprises the following steps: a material slitting step: cutting a raw material to a specified size of the capacitor; a riveting and rolling step: rolling the cut raw material into a core of the capacitor on a riveting and rolling machine table; a drying step: carrying out drying treatment on the coiled core; an impregnation step: soaking the dried core in a liquid electrolyte; an assembling and sealing step: adding materials such as an aluminum shell, a cover plate and the like to the impregnated core, riveting positive and negative electrode guide foil strips of the core with a cover plate leading-out positive electrode leading-out terminal and a cover plate leading-out negative electrode leading-out terminal respectively, then allowing an assembled product to pass through a curling machine, conducting sealing and forming, and forming a sealed space in the capacitor to realize isolation from the outside; a sleeving step: sleeving the sealed and formed capacitor with a plastic sleeve; an aging step; etc.

Description

technical field [0001] The invention belongs to the technical field of electrical appliances, and in particular relates to a preparation method of a high-voltage aluminum electrolytic capacitor and the capacitor. Background technique [0002] Capacitors are the most critical components in electrical appliances, especially in today's era where technology is becoming more and more developed and highly intelligent, capacitors are already essential components in electrical appliances. Aluminum electrolytic capacitors are the most special type of capacitors in the capacitor family. High intelligence, miniaturization, and high power are all inseparable from aluminum electrolytic capacitors. [0003] Traditional aluminum electrolytic capacitors are divided into low voltage, medium voltage and high voltage, and generally the highest rated voltage is 450VDC. In recent years, with the rapid rise of energy saving, environmental protection, and new energy, the corresponding internal mo...

Claims

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Application Information

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IPC IPC(8): H01G9/00H01G9/035H01G9/045H01G9/055H01G9/145
Inventor 黄定胜陈泓伊马盛威
Owner ZHUHAI GREE XINYUAN ELECTRONICS
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