锂电池和镍氢电池自适应充电器的设计

his paper charge principle, two kinds of charge model and design features of an intelligent charger , the hardware and software implementation methods is discussed in detail.for the characteristics of charger ,this paper provides a adaptive charger base on PIC877 single chip computer as the core, combined with general-purpose charge chip MAX846A, the charger can software adaptively charge for battery when we do not know it’s chemical and need not change the type of hardware structure. It take advantage of the thermal resistance to monitor the heat of battery and prevent the battery overcharge. Because a result of high-performance micro-controllers and high-resolution A / D conversion circuit is used, this charger has a higher degree of accuracy, a better solution for lithium-ion batteries and Ni-MH / Ni-Cd battery