Design for symmetrical management of storage battery expert system based on single battery

This paper aimed at the characters of direct current source on transformer substation, communication station and electric vehicle, and then writers brought forward battery time-sharing charging management system (BTMS) and battery synchronous charging management system (BSMS). According to AT89C51 as control kernel, two systems adopted management module of power supply PS402 as monitoring of unit module. The symmetrical charge of module is formed by two unit module. Writers adopted intelligent tri-steps symmetrical charge on single battery and expert system as charge of unit module. Each unit module was connected by tree-control system formed RS-485 and Modbus protocol. The experiment objects were there lead-acid batteries NP4-12 (12 V, 4 Ah) which were produced by GUIDING Com, value of constant current charge 1.8 A, value of constant voltage charge 14.5 V, value of trickle current charge 13.9 V, and final voltage of there batteries at 0.04 V-0.05 V. BTMS has been used in Bianyang transformer substation, Luodian, Guizhou province for 1 year. System performance is steady, and makes life of battery improved one time and capacity utilance of battery improve 28%. BSMS make electric vehicle´s battery charging quickly and fulfill the request of great output power