Ultralow-temperature aluminum electrolytic capacitor and manufacturing method thereof

Abstract

The invention discloses an ultralow-temperature aluminum electrolytic capacitor and a manufacturing method thereof. The manufacturing method comprises the following steps: (1), winding a core package;to be specific, intervening electrolytic paper between an anode foil and a cathode foil to wind the anode foil and the cathode foil into a core cladding; (2), performing an impregnation step; to be specific, immersing the wound core cladding into an electrolyte for impregnation treatment; (3), performing a packaging step; to be specific, wrapping the impregnated core cladding into a shell and sealing the shell with a rubber plug; (4), performing aging; to be specific, preparing the electrolyte from the following components, by weight: 47 to 62 percent of solvent, 20 to 35 percent of solute and 10 to 18 percent of additive, preparing the solvent from a main solvent, an auxiliary solvent and a secondary solvent, and preparing the solute from ammonium formate, ammonium acetate, ammonium diacid and ammonium benzoate. The aluminum electrolytic capacitor manufactured through the manufacturing method has good temperature performance and stability so as to adapt to complex and changeable natural environments, electrolyte in the capacitor cannot be frozen, and the electrical performance cannot be weakened.

Description

technical field [0001] The invention relates to the technical field of capacitor manufacturing, in particular to an ultra-low temperature aluminum electrolytic capacitor and a manufacturing method thereof. Background technique [0002] With the development of the electronics industry, electronic equipment has higher and higher requirements for environmental temperature adaptability (cold resistance and heat resistance), especially outdoor complete machines (such as LEDs, energy-saving lamps, ballasts, drive power supplies, switching power supplies etc.) There are more and more applications, and with the continuous development of technology and cost optimization, LEDs, driving power supplies, power switches, etc. continue to develop in the direction of good low temperature resistance. [0003] Aluminum electrolytic capacitors are the most widely used basic components in electronic products. In recent years, with the rapid development of science and technology and the electro...

AI Technical Summary

Problems solved by technology

[0004]In terms of the design of aluminum electrolytic capacitors currently used in LEDs, at ultra-low temperatures such as -55°C, the liquid electrolyte is easy to solidify, and the electrical conductivity drops significantly. Impedance rises sharply

Under extremely low temperature conditions, liquid capacitors also have shortcomings. For example, the activity will be weakened, and the electrical performance on the circuit will also be weakened. Customers generally encounter the phenomenon that electrical appliances start slowly or fail to start. The main reason is that the capacitor is affected. In the case of ambient temperature, the capacity decreases, and the chemical components in the electrolyte, the main component of the capacitor, solidify and crystallize at low ambient temperature, which affects the electrical characteristics of the capacitor, making the capacitor unable to perform its original function, and causing the whole machine to fail to operate.

Images