Fault positioning device and method for single capacitors in super-capacitor banks

Abstract

The invention belongs to the technical field of aerial airborne electronics, is applied to independent power supplies of recorders, and particularly relates to a fault positioning device and method for single capacitors in super-capacitor banks. A microcontroller controls a voltage monitoring and current monitoring circuit and acquires current flowing through each super-capacitor bank and the voltage of each single capacitor, the capacity of each super-capacitor can be calculated by calculating acquired data, the calculated value of the capacity of each super-capacitor is compared with a rated value of the capacity, and the fault of the super-capacitor can be judged if the calculated value exceeds an allowable range. As a fault detection circuit of each super-capacitor and a positioning algorithm are embedded into aerial airborne electronic equipment, online detection and fault report for the super-capacitors are realized, compared with an existing method, faults of the super-capacitors can be recognized as early as possible, and the maintenance efficiency of the independent power supplies is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of aviation airborne electronics, is applied to an independent power supply of a recorder, and in particular relates to a fault location device and method for a capacitor unit in a super capacitor bank. Background technique [0002] The domestic aviation cockpit audio recorder (commonly known as: black box) uses supercapacitors as the energy storage medium on the independent power supply. However, supercapacitors are mainly for industrial applications, such as electric energy storage in new energy (wind power, solar power, etc.) systems, and their reliability is not as good as military tantalum electrolytic capacitors. Moreover, since the supercapacitor is a liquid electrolytic capacitor, according to its sealing condition, its electrolyte will gradually volatilize after a certain period of time, resulting in a decrease in capacitor capacity or even failure. [0003] For the detection of supercapacitor fail...

AI Technical Summary

Problems solved by technology

Due to the large capacity of the supercapacitor, its capacity is generally charged and discharged by constant current, and calculated according to the change of voltage with time, instead of the equivalent impedance of the general capacitor using AC excitation test, so the test time is longer. less efficient

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