EV battery

The influence of negative plate sulfate to the battery

by：Vglory 2020-08-28

Battery negative plate sulfuric acid salinization is negative PbSO4 irretrievable for PbO2 and Pb. Charging is difficult to recover. Cathode sulphates reasons: more long-term owe charging, the cathode depolarization, failed to timely charging after discharge, electrolyte concentration is too high, the electrolyte layer phenomenon, can cause negative sulphates. Electrolyte layer, or the concentration difference, sulfuric acid concentration is too high and too dilute concentrations are belong to the passivation concentration area, only the concentration of appropriate area have activity, nature is to reduce the utilization of active material. Charging reaction is the reverse reaction discharge, due to the electrolyte concentration, charging reaction only in the appropriate concentration zone, greatly reduces the charging efficiency, charging is difficult. Thus can see: with the continuous charge/discharge cycle and for a number of floating charge, there is a growing number of PbSO4 deposition in battery drain, along with the electrolyte concentration increased, lead sulfate crystallization coarsening, sulfuric acid salinization is serious. 电池阳极板材硫酸盐是不能违背变化转化为二氧化铅和铅PbSO4阳极。刷新很难恢复。阳极硫酸转的原因:由于Chong和阳极后,打开电很长一段时间不及时刷新,电解液密度过高,电解液的层将引起阳极硫酸盐的转向现象。电解质层即密度差,密度高和密度稀疏所有属于率直的硫酸密度区域,只有密度充足率只有活动的地区,降低活动的本质是利用材料。刷新响应的不良反应是打开电、厚不好因为电解质,刷新反应进行合适的密度地区和刷新效率大大降低,然后刷新很难进行。从这里可以看到:随着继续冲/把循环一年后浮庄,有越来越多的PbSO4s电池槽底部沉积,伴随着一个电解液密度增加,硫酸铅结晶厚,硫酸严重程度。

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