Design And Development Of Accumulator Battery Charging And Discharging Control System

With the development of technology, people increasing focus on the battery energy system with large storage capacity. The system has been widely used in many fields such as electric vehicles, high power UPS, power plant and substation DC systems, and communications systems. Accumulator batteries are series from a certain amount of single cells. The paper used a rational and efficient approach for charging system, as well as detected charge and discharge parameters of each single battery and accumulator battery such as voltage, electric current and temperature increase. As a result, we can find the damaged or significantly performance decreased batteries in time. Furthermore, the two methods play an important role on the reliability of extending battery life and reducing costs.The paper use12V battery to build a small system and verify the feasibility of the system.The paper designed the holistic structure of battery charge and discharge system, including PC node subsystem,CAN communication module, and online controling system.Node subsystem used PIC16F877embedded singlechip as the core to complete functions, such as data collection, chargeing process controlment, and communications.Moreover,the paper design the the communication between node and PC in CAN communication system.Furthermore, the paper develop PC controling program by VB to show and analyze the parameter.nodes with the order for each node.According to the internal characteristics of the battery, we established a mathematical model for the battery charging process after building hardware system. Also, the paper studied the control process of the charging battery by two fuzzy PID control algorithm. Compared with the conventional PID control algorithm, we can confirm the effectiveness of fuzzy PID control algorithm simulation.