Capacitor intelligent charging system based on sepic circuit

Abstract

The invention discloses a capacitor intelligent charging system based on an SEPIC circuit. The capacitor intelligent charging system comprises a main circuit, a control circuit, a current sensor, a voltage sensor, a capacitor and a temperature sensor. The main circuit is composed of a power supply module, an SEPIC main circuit module and a high-frequency transformer module. The control circuit is composed of a master control circuit module, a DC / DC conversion module, an A / D conversion module, an IGBT driving module and an upper computer monitoring module. Charging time of the capacitor can be shortened by high-efficiency conversion efficiency and adjustable output of the SEPIC main circuit module and charging speed is high. The defect of insufficient voltage boost of the SEPIC main circuit module is completed by the high-frequency transformer module. Charging time of the capacitor is greatly reduced by a high-current and constant-current and then constant-voltage mode. The master control circuit module communicates with the upper computer module so that system parameters can be modified online and monitored online, and thus charging reliability of the capacitor can be enhanced.

Description

technical field [0001] The invention relates to the field of intelligent charging systems for capacitors, in particular to an intelligent charging system for capacitors based on SEPIC circuits. Background technique [0002] Supercapacitor is a new type of energy storage device developed in the 1970s between traditional electrostatic capacitors and chemical batteries; compared with traditional electrostatic capacitors, supercapacitors have a specific capacity of 2000 to 6000 times that of traditional capacitors. Instantaneous high current, fast charging, and large capacity; compared with chemical batteries, the specific power is 10 times that of chemical batteries, and the power density is 100 times that of chemical batteries. It can be charged with high current, and it only takes a few seconds to fully charge It has the advantages of high charging efficiency, many charging cycles, no pollution, no maintenance, wide operating temperature range, no memory and safety; therefore...

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Problems solved by technology

[0003] With the development of society, capacitors, especially supercapacitors, are widely used in various fields, especially in the field of urban electric locomotives. The problem needs to be solved urgently. Compared with the locomotive using battery energy storage, the locomotive using super capacitor has obvious advantages in starting, climbing, etc., and has the advantages of short charging time, safety and pollution-free, and no manual participation in charging. It is popularized and used in the field of electric vehicles; however, there are very few charging systems specially used for capacitors at present, and there is a serious problem that the charging system used to charge the battery has a long charging time, which will shorten the life of the capacitor and affect the fast charging of the capacitor with high current feature play

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