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首页> 外文期刊>Journal of power sources >Investigation of lead dendrite growth in the formation of valve-regulated lead-acid batteries for electric bicycle applications
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Investigation of lead dendrite growth in the formation of valve-regulated lead-acid batteries for electric bicycle applications

机译：电动自行车用阀控式铅酸蓄电池中铅枝晶生长的研究

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摘要

The battery temperature, H2SO4 distribution, Pb2+ ion concentration and composition of the plates during the plate soaking of the 12 V 12 Ah valve-regulated lead-acid (VRLA) battery are studied. A simulated cell composed by two pure Pb plates and the absorptive glass mat (AGM) separator is used to investigate the growth of the lead dendrite in the separator, which is verified by analyzing the faulty batteries after the formation and the failure batteries after the usage. It is found that the H2SO4 is exhausted very quickly after filling and the separator near the plates can become neutral during soaking. Low acidity, high temperature and small PbSO4 particle size will increase the Pb2+ ion concentration. Higher Pb2+ ion concentration makes more PbSO4 tend to deposit on the coarse glass fibers, develop along them and even enwrap the entire fiber. And the fine PbSO4 crystals are continually transformed into large PbSO4 crystals via dissolution-deposition. In the subsequent charge, these PbSO4 crystals will be reduced to the club-shaped lead dendrites and may lead to short circuit of the battery. (C) 2015 Elsevier B.V. All rights reserved.
机译：研究了12 V 12 Ah阀控铅酸（VRLA）电池在极板浸泡过程中的电池温度，H2SO4分布，Pb2 +离子浓度和极板组成。使用由两个纯Pb板和吸收性玻璃毡（AGM）隔板组成的模拟电池，研究隔板中铅枝晶的生长，并通过分析形成后的故障电池和使用后的故障电池来验证。发现填充后的H2SO4排放非常快，并且在浸泡过程中，板附近的隔板会变成中性。低酸度，高温和小的PbSO4粒径会增加Pb2 +离子浓度。较高的Pb2 +离子浓度会使更多的PbSO4倾向于沉积在粗玻璃纤维上，并沿着粗纤维生长，甚至包裹整个纤维。通过溶解沉积将细小的PbSO4晶体连续转化为大的PbSO4晶体。在随后的充电中，这些PbSO4晶体将还原为棒状铅树枝状晶体，并可能导致电池短路。 （C）2015 Elsevier B.V.保留所有权利。

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