The Design of a Non-energy-Consuming Balance System for Lithium-ion Batteries

In this paper, the characteristics of power lithium-ion batteries is studied. And a non-energy-consuming charging balance system which is controlled by the MCU is designed. In this system the differential amplifier is used to detect each cell voltage of the batteries continuously. The inductors, replace the resistors, is used to bypass the full-charged cell, so the waste of energy can be avoided. At the end of the paper, the results of the experiment balancing a four-cell pack in the charging process are given. From the results, we can conclude that this system can protect batteries from over-charged effectively.