A double closed loop buck charging control circuit of super capacitor based on voltage limiting and tracking

Abstract

A supercapacitor double close loop buck charging control circuit base on voltage limiting tracking is disclosed, include a power supply and a drive circuit, detection and control circuit, It includessuper capacitor S, PWM chip I, voltage operational amplifier, current operational amplifier, detection operational amplifier, MOS transistor, power supply regulator, voltage limiting regulator, driving regulator, diode, inductor, power supply capacitor, voltage limiting capacitor, driving filter capacitor, voltage filtering capacitor, voltage positive terminal capacitor, voltage negative terminalcapacitor, current negative terminal capacitor, current positive terminal capacitor and so on. The invention has the functions of dynamic constant-current charging, voltage-limited charging when high-voltage power supply and full-voltage tracking charging when low-voltage power supply, so as to ensure the safety, reliability and fast voltage adaptive charging control of the super capacitor under different charging power supply voltage conditions, and has simple circuit, low cost, high reliability, good universality, easy modularization and product serialization.

Description

technical field [0001] The invention belongs to the field of industrial measurement and control, and relates to a circuit, in particular to a supercapacitor double-closed-loop step-down charging control circuit based on a voltage-limiting tracking type, which is suitable for applications where supercapacitors are used for energy storage, power supply and control. Background technique [0002] Supercapacitors are increasingly used in modern new energy storage, power supply and control of various military and civilian equipment. One of the important issues in supercapacitor application technology is the voltage-limiting fast charging control of supercapacitors. The current commonly used methods and their existing problems are: one is constant voltage charging, and the circuit is simple. The disadvantages are: initial The impact of the charging current is too large to be controlled, and the transition process takes a long time; the second is based on the solution of a dedicated...

AI Technical Summary

Problems solved by technology

One of the important issues in supercapacitor application technology is the voltage-limiting fast charging control of supercapacitors. The current commonly used methods and their existing problems are: one is constant voltage charging, and the circuit is simple. The disadvantages are: initial The impact of the charging current is too large to be controlled, and the transition process takes a long time; the second is based on the solution of a dedicated constant-current and constant-voltage charging chip, and the charging control is fast. The charging voltage of the supercapacitor is required to be lower than the power supply voltage of the circuit, and the power supply conditions have not been fully utilized, and the circuit in the existing scheme is more complicated and the cost is higher

Images