阀控铅蓄电池在低温下的充放电行为

Charge and discharge behaviour of VRLA batteries at low temperature

论述了阀控铅蓄电池在低温下的充放电行为，对影响铅蓄电池低温放电行为的主要因素：膨胀剂、放电电流密度、充电状态、温度、电解液密度及隔板饱和度进行了分析与讨论。由于贫液，阀控铅蓄电池更容易因电阻增大、离子扩散困难影响其低温大电流放电性能。但是，解决阀控铅蓄电池低温启动放电问题最主要的还是膨胀剂，以防止负极钝化。因低温条件下铅蓄电池的充电效率很低，为保持阀控铅蓄电池的性能，应避免对其进行低温充电。

Charge/discharge characteristics of VRLA batteries at low temperature and the main factors which influence the charge and discharge behavior,including expander,discharging current density,charge stage,temperature,electrolyte density,and separator saturation are analyzed and discussed.High drain capability of VRLAB at low temperature are limited by increased resistance because of starvation of electrolyte and difficulty of ion diffusion.The most important factor to improve its high rate discharge performance is expander.To ensure VRLA batteries’s good performance,low temperature charge should be avoided.