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Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof

A technology of aluminum electrolytic capacitors and electrolytes, applied in the field of electrochemistry, to achieve the effects of eliminating pressure rise, not easy to crystallize, and low resistance

Inactive Publication Date: 2011-05-25
东莞宏强电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical problem of chipping aluminum electrolytic capacitors: the electrolyte has to withstand high temperatures above 125°C

Method used

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  • Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof
  • Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing an electrolyte for a chip type aluminum electrolytic capacitor, comprising the following steps:

[0035] (1) Weighing: Weigh the raw materials according to the following formula;

[0036] Table 1

[0037] Component Weight (g)

[0038]

[0039] Ethylene glycol 69

[0040] Polyethylene glycol 10

[0041] 1,7-Dimethyl-ammonium sebacate 9

[0042] 1,7 ammonium sebacate: 3

[0043] Ammonium sebacate: 2

[0044] Aromatic nitro compounds 2

[0045] p-Nitrobenzyl alcohol 2

[0046] Mannitol 1

[0047] Ammonium hypophosphite 1

[0048] Ethylene oxide propylene oxide copolyether 1

[0049] (2) Dissolution: Add ethylene glycol into a container with a stirrer and a thermometer, raise the temperature to 60°C with a closed electric heater, add polyethylene glycol, 1,7 ammonium sebacate, and ammonium sebacate in sequence , 1,7-dimethyl-ammonium sebacate, mannitol, ammonium hypophosphite, p-nitrobenzoic...

Embodiment 2

[0051] Embodiment 2, implementation 3 are basically the same as embodiment 1, the difference is that the composition of raw materials is different, see Table 2.

[0052] Table 2

[0053]

[0054] Five chip-type aluminum electrolytic capacitors of 400V, 450V, and 470V were prepared from the electrolytes of the above examples, and the performance of the capacitors was tested. The result: all of them can withstand 125°C and more than 2000 hours of load carrying.

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Abstract

The invention provides a method for preparing an electrolyte for a chip aluminum electrolytic capacitor. The method comprises the following steps of: (1) weighing: weighing raw materials; (2) dissolving: adding ethylene glycol into a container with a stirrer and a thermometer, raising the temperature to 60 DEG C by using a closed electric heater, sequentially adding polyethylene glycol, 1,7-ammonium-sebacate, ammonium sebacate, 1,7-dimethyl-ammonium-sebacate, mannitol, ammonium hypophosphite, paranitrobenzoic acid or para-nitrophenyl methanol, and oxirane and epoxypropane copolyether, heating to 130 DEG C, and stirring to totally dissolve the components; and (3) cooling: standing and cooling to room temperature to obtain the electrolyte. The technology is simple, the condition is easy to control, and the preparation method is suitable for scale production. The invention also provides an electrolyte which has the characteristics of high temperature resistance, high spark voltage and long service life, and is applicable for making the chip aluminum electrolytic capacitor.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a method for preparing an electrolyte for chip-type aluminum electrolytic capacitors and the electrolyte. Background technique [0002] Aluminum electrolytic capacitors have incomparable advantages over other capacitors. It has large capacity, low production cost, and high reliability, and is widely used in various electrical appliances such as televisions. Although various capacitors with excellent performance have been sold on the market, research on new and high-performance capacitors is still in the ascendant. Chip-type aluminum electrolytic capacitors are high-end products in electrolytic capacitors. They use high-molecular polymers as electrolytes. They often use surface mount technology to mount components (chip electronic components), which has a great impact on the high-temperature resistance of the electrolyte. high demands. Some factors will cause electroly...

Claims

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Application Information

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IPC IPC(8): H01G9/035
Inventor 汪衍石木果
Owner 东莞宏强电子有限公司
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