一种均衡考虑锂电池内部能量损耗和充电速度的多段恒流充电方法

发布时间：2018-06-20 15:50

本文选题：锂电池直流内阻 + 充电时间　；参考：《电工技术学报》2017年09期

【摘要】：锂电池快速充电方法应该均衡考虑电池的安全、寿命和充电时间。为此,应该控制锂电池的温度或能量损耗。提出一种均衡考虑锂电池能量损耗和充电时间的多段恒电流充电方法。首先,通过测试不同电流的恒流工况充电电压曲线,建立锂电池直流内阻随荷电状态(SOC)和电流I变化的函数关系式。其次,简化恒流段内能量损耗计算表达式,并设计用于均衡充电时间和能量损耗的充电目标方程。最后,设计一条权重变化曲线以确定各个恒流段的充电电流。此方法实验过程简单,充电电流的计算过程简单。通过与恒流充电方法的实验比较,验证了该方法的优点。
[Abstract]:Rapid charging of lithium batteries should take into account battery safety, life and charging time. To this end, the temperature or energy loss of the lithium battery should be controlled. A multistage constant current charging method considering the energy loss and charging time of lithium battery is proposed. Firstly, by measuring the charging voltage curves of different current conditions, the functional relationship between DC resistance and current I of lithium battery with charge state (SOC) and current I is established. Secondly, the expression of energy loss in constant current is simplified, and the charging target equation is designed to equalize charging time and energy loss. Finally, a weight change curve is designed to determine the charging current of each constant current section. This method is simple in experiment and simple in calculation of charging current. Compared with the constant current charging method, the advantages of this method are verified.
【作者单位】：沧州师范学院机械与电气工程学院;清华大学自动化系;燕山大学电力电子节能与传动控制河北省重点实验室;
【基金】：国家自然科学基金项目资助(U1510208,61273045和51361135705)
【分类号】：TM912

【相似文献】