摘要
电流衰减指数(充电接受率)对快速充电起着决定性的作用。采用分段充电、恒流放电工作制度,深入研究了在不同初始工作条件下单体铅蓄电池,电流衰减指数的变化规律。研究结果指出:电流衰减指数在整个充电过程中呈阶段性变化,在t0～tmid区间保持恒定。循环次数、初始电解液比重、充电电流等均对电流衰减指数产生影响。在初始充电电流与电解液比重(荷电状态)的"最佳"配比关系下,可获得最大电流衰减指数。在保证不受温度与循环次数影响条件下,通过实验找到电流衰减指数与充放电其它因素的关系,并从二次电池等效数学模型出发,解释了这些关系的形成。从而提出"初始充电电流随电池的初始荷电状态而确定"的智能快速充电方案。
Current decay index plays a decisive role in the rapid charge. The rules of current decay index under different operating conditions on the model of discharging of constant-current and step- charging, were studied in this paper. The results showed that the current decay index varied in the entire charging process, but maintained constant between t0 and tmid· The cycle times , electrolyte specific gravity and charging current were factors affecting the current decay index. By optimal matching initial charge current with initial electrolyte specific gravity, the largest current decay index was achieved. Under the conditions guarranteeing no influences by temperature and cycle times, the relation between current decay index and other charge and discharge factors were found through experiment and research. And the formation of these relations was explained from the equivalent mathematical models of secondary battery. Thus ,the intelligent rapid charging programme that the initial charge current was determined with the initial state-of charge of battery was given.
出处
《电池工业》
CAS
2009年第1期12-16,共5页
Chinese Battery Industry
基金
湖南省教育厅资助科研项目(06D074)
关键词
电流衰减指数
快速充电
铅蓄电池
current decay index
rapid charge
lead-acid battery
