A voltage-controlled current-limiting charging circuit for a supercapacitor bank

Abstract

The invention belongs to a charging control circuit for a supercapacitor based on a non-adjusting-busbar mode of a spacecraft. The circuit can increase the charging current for the supercapacitor with the rise of the busbar voltage; when a constant voltage point of the supercapacitor is achieved, a constant voltage control state is performed. The charging control circuit comprises a super-buck voltage-reduction power module, an electric current loop-voltage loop dual-loop control module, a charging current reference follow-up busbar voltage control module, and a supercapacitor constant-current constant-voltage control module. According to the charging control circuit, the supercapacitor, serving as a backup power, satisfies the power requirement of the busbar preferably; with the increase of excessive energy, the busbar voltage rises gradually, and the charging current is increased gradually; and the charging control circuit is simple in control structure, less in required devices and simple in interface.

Description

Technical field [0001] The invention belongs to the technical field of space power supplies, and specifically relates to a control circuit of a super capacitor bank voltage-controlled current-limiting charging circuit. Background technique [0002] Unregulated bus is an important energy control mode of spacecraft. Its characteristic is to directly charge the battery with the output current of the solar array. The battery voltage is the bus voltage. As the battery voltage changes continuously with the charging and discharging process, when the bus voltage is not adjusted Always changing. [0003] As an auxiliary energy source, the super capacitor is generally connected in parallel with the battery. The super capacitor has the ability to instantly output high power. Therefore, when there is a large pulse load demand, the super capacitor will provide most of the energy for the large pulse load. [0004] Supercapacitors and batteries are of different importance. Priority should be given...

AI Technical Summary

Problems solved by technology

[0004] The importance of supercapacitors and batteries is different, and battery charging should be given priority (batteries supply power to the aircraft platform). However, due to the limited light period of low-orbit light, it is impossible to wait for the battery to be fully charged before charging the supercapacitor. Therefore, how to solve the problem of supercapacitor charging becomes a problem. Technical Difficulties

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