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Electrolyte for shrinkage capacitor resistant to large ripple

A capacitor and electrolyte technology, applied in the direction of capacitors, electrolytic capacitors, circuits, etc., to achieve the effect of no corrosion and small drum bottom

Active Publication Date: 2018-07-06
SHENZHEN CAPCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve these excellent performances of capacitors, the electrolyte used in shrinking capacitors should also be optimized, but there is no patent report on the electrolyte used in 400-450W V-pin type shrinking capacitors.

Method used

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  • Electrolyte for shrinkage capacitor resistant to large ripple
  • Electrolyte for shrinkage capacitor resistant to large ripple
  • Electrolyte for shrinkage capacitor resistant to large ripple

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the following examples, the main solute is 2-butylammonium suberate, and the synthesis method of its inhibitor G is as follows: heating an ethylene glycol solution with a mass content of 2-butylammonium suberate to 130-135 ℃ for 8 hours, during the reaction, use a water trap to remove water to obtain and The ethylene glycol solution of the inhibitor, wherein the ethylene glycol mass content is 40%.

[0037] Three kinds of electrolytes (A, B, C) were prepared according to the formula in Table 1, and their conductivity at 30°C, pH value at 30°C, flash voltage at 30°C, and viscosity at 30°C were measured respectively. The properties of the electrolyte are shown in Table 2.

[0038] Table 1 Electrolyte formula

[0039]

[0040]

[0041] Table 2 Electrolyte characteristics

[0042]

[0043]

Embodiment 2

[0045] The electrolyte A prepared according to the above-mentioned Example 1 was compared with the existing conventional electrolyte F, and a 450V 680μF, ф35*50 aluminum electrolytic capacitor was made, and a ripple current of 1.96A / pcs (120HZ) was applied, and a load of 105°C was applied. The test results are shown in Table 3.

[0046] table 3

[0047]

[0048] Electrolyte A is compared with ordinary electrolyte F. After 2000 hours of testing, the performance meets the product requirements, and the bottom of the drum is small. Electrolyte F has 5pcs corrosion broken after 2000 hours.

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Abstract

The invention discloses an electrolyte for a shrinkage capacitor resistant to large ripple. The electrolyte comprises the following raw materials based on percent by weight: 50-80% of main solvent ethylene glycol, 2-20% of auxiliary solvent, 1-8% of main solute, 0.5-5% of auxiliary solute, 1-15% of spark voltage increasing agent, 0.3-8% of hydrogen absorption agent, 0.05-5% of formation improvement agent, 0.5-6% of waterproof additive and 0.05-5% of stopping agent, wherein the stopping agent is selected from one or more of compounds shown in formulas (1) in the specification. The performance of the electrolyte conforms to product requirement, the electrolyte is small in drum bottom, and no corrosion and no abnormal condition are generated.

Description

technical field [0001] The invention relates to the technical field of electrolytic solutions for high-voltage aluminum electrolytic capacitors, in particular to an electrolytic solution for shrinkable capacitors with large ripple resistance. Background technique [0002] Shrink capacitors are mainly to meet the miniaturization and portability requirements of the new generation of electronic complete machines. Assuming that the capacitor specification is 450V 680μF, the size of the standard product is In the case of shrink capacitors, the dimensions can be The space has been reduced by about 9% (volume ratio), and miniaturization has been realized, so it is possible to provide aluminum electrolytic capacitors most suitable for space-saving circuit design. The shrinkage is mainly to reduce the space, lighten the equipment, and reduce the cost at the same time. If you need a capacity of 450V 5600μF, you need 10 pieces of 450V 560μF, The capacitor; and only 8.23 ​​450V 6...

Claims

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Application Information

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IPC IPC(8): H01G9/035
Inventor 黄丽青贾云池玉梅王明杰
Owner SHENZHEN CAPCHEM TECH