电动自行车智能充电器设计说明

电动自行车智能充电器设计摘 要：本课题综合应用所学的电路、电子技术、模拟电子线路的理论知识，深化学习与实践操作 ，提出并设计出一种智能控制电路。通过对充电器的充电与工作原理的分析和电路的设计,并实际调试，来加强对开关电源产品的认知和接受，在讨论电动自行车的基础上，通过仔细调查铅酸蓄电池充电注意事项，电动车用铅酸蓄电池充电过程和充电曲线，综合运用开关电源技术，开发了一款基于 UC3842 和 LM358 的智能充电器，该充电器能够对蓄电池进行很好的监测与控制，从而在达到快速充电的同时又能够有效的对蓄电池起到保护作用。充电过程分涓流充电、快速充电、均充电、浮充电四个部分。主电源部分采纳光电耦器 PC817 控制集成芯片 UC3842 中误差放大器的输入误差电压，实现稳压充电。恒流电路实现对锂电池恒流充电。该方案不仅可实现快速充电，同时可以减少析气，消除硫化，进行均衡充电，从而大延长了铅酸蓄电池的使用寿命。关键词：智能；锂电池充电；开关电源；UC3842Design of Intelligent Electric Bicycle Charger Student majoring in mechatronic engineering Tutor Abstract ： The circuit, electronic technology, analog electronic circuit theory knowledge comprehensive application of the theory, in-depth study and practice, put forward and design of an intelligent control circuit. Through the design analysis and the charging circuit and working principle of charger and the actual debugging, to strengthen and acceptance of switching power supply products, cognition, based on the electric bicycle, based on the investigation of lithium battery charging notice, lithium batteries for electric vehicle charging process and charging curve, the integrated use of switch power supply technology, development a intelligent charger based on UC3842 and LM358, the charger to the battery well monitored to control, which can effectively protect the battery work at the same time achieve rapid charging. The charging process of trickle charging, fast charging, charging, charging four parts. The...