THE DESIGN OF LITHIUM BATTERY CHARGING CIRCUIT

Biqing Li, Zhao Li, Xuezhen Li

ABSTRACT: This page proposed a Lithium battery charging circuit which used MCU AT89S52 as the core, consists of voltage regulator module, power supply switch module, lithium battery modules and prompt modules. It can be achieved precharge, fast charger, slow charger for the lithium battery charger; charging process presentation; disconnect the power after the battery is full automatically. The circuit has very high use value with the advantages of simple design.

Keywords: The lithium battery, charging, Single chip microcomputer.