Method, system and device for adjusting charging current ripple of backup battery unit

• Main Author: CUI XUETAO
• Format: Patent
• Language: Chinese; English
• Published: 07.01.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a method, system and device for adjusting charging current ripples of a backup battery unit, and the method comprises the steps: obtaining a set charging current value and an actual output current value of a charging circuit in the backup battery unit, and obtaining a current error based on the set charging current value and the actual output current value; obtaining a PID output value based on a PID algorithm and the current error, and limiting the amplitude of the PID output value between 0 and 1; obtaining the conduction time of an MOS tube in the charging circuit based on the amplitude-limited PID output value; obtaining a switching period of the MOS tube based on the conduction time; and respectively writing the conduction time of the MOS tube and the switching period of the MOS tube into a comparison register and a period register so as to adjust the charging current ripple of the backup battery unit. Through the scheme of the invention, the value of the comparison register and t