新型合成有机膨胀剂对铅酸动力电池低温性能的影响研究  

Study on effect of new synthetic organic expander on low temperature performance of lead-acid power battery

作　　者：李林萍 吴涛 战祥连 王刚 孟秀霞[1] LI Linping;WU Tao;ZHAN Xianglian;WANG Gang;MENG Xiuxia(Shandong University of Technology,Zibo Shandong 255056,China;Zibo Torch Energy Co.,Ltd.,Zibo Shandong 255056,China)

机构地区：[1]山东理工大学,山东淄博255056 [2]淄博火炬能源有限责任公司,山东淄博255056

出　　处：《电源技术》2024年第6期1123-1127,共5页Chinese Journal of Power Sources

摘　　要：讨论了新型合成有机膨胀剂(简称新型膨胀剂)对铅酸动力电池低温性能的影响,通过差示扫描量热法(DSC)/热重分析法(TGA)测试了木素磺酸钠与新型膨胀剂的热稳定性;通过循环伏安(CV)和析氢曲线测试,分析了二者对负电极表面电化学行为和负极析氢行为的影响;通过扫描电子显微镜法(SEM)分析了木素磺酸钠与新型膨胀剂对负极活性物质微观形貌的影响;通过低温性能测试,对比分析了二者对动力电池低温性能的影响;通过高温过充后低温保持率测试,对比分析了二者在高温环境下的稳定性;通过充电接受能力测试,对比分析了新型膨胀剂对电池充电接受能力的影响。研究发现:新型膨胀剂热稳定性明显优于木素磺酸钠,能够提高负极表面的铅离子还原反应;从析氢行为来看,新型膨胀剂负电极析氢电位更负,更不易析氢;新型膨胀剂对负极活性物质成晶形态不同于木素磺酸钠,更有利于形成比表面积大的晶粒结构;在提高动力电池低温性能方面,新型膨胀剂优于木素磺酸钠;耐高温性能、充电接受能力也优于木素磺酸钠。The effect of the new synthetic organic expander on the low temperature performance of lead-acid power batteries was discussed.The thermal stability of the sodium lignosulfonate and new expander was tested by DSC/TGA;through CV and hydrogen evolution curve tests,the effects on the surface electrochemical behavior and hydrogen evolution behavior of the anode were analyzed;the effects on the microcrystal morphology of the anode active substance were analyzed by SEM;the influence on the low temperature performance of power battery was analyzed by low temperature performance test;through the test of the low temperature retention after high temperature overcharge,the stability in high temperature environment was compared and analyzed;the influence of the new expander on the battery charging acceptability was compared and analyzed through charging acceptability test.It’s found that the thermal stability of the new expander is better than that of sodium lignosulfonate;it can improve the reduction reaction of lead ion on the anode surface;from the hydrogen evolution behavior,the hydrogen evolution potential of the new expander anode is more negative and it is more difficult to hydrogen evolution;the new expander is different from sodium lignosulfonate in the crystalline morphology of the anode active substance,which is more conducive to forming the grain structure with larger surface area;in terms of improving the low temperature performance of power battery,the new expander is better than sodium lignosulfonate;its high temperature resistance and charging acceptability are better than that of sodium lignosulfonate.

关 键 词：铅酸电池 膨胀剂 低温性能 木素磺酸钠 

分 类 号：TM912[电气工程—电力电子与电力传动]