混合动力汽车用铅炭超级电池研究

Study on the Pb-C ultra-batteries for hybrid-electric vehicles

铅炭超级电池由于具有高功率、长寿命等优点而被广泛关注,并被研究应用于混合动力汽车。本文通过循环伏安、SEM测试对铅炭负极板进行了研究,同时制备铅炭超级电池进行循环寿命测试。结果显示,炭材料加入到常规动力蓄电池负极活性物质中,可以增强负极板的电容特性。由于炭材料颗粒细小,可以细化硫酸铅颗粒,抑制负极硫酸盐化,显著延长电池在HRPSoC条件下的循环寿命;同时,炭材料还可起"储酸器"的作用,提高电池的放电电位,降低充电过电位;但炭材料的加入会加快负极的析氢速率。

The Pb-C ultra-batteries received extensive concern for it has the advantages of high power, long life, etc, and it had been used in hybrid-electric vehicles. The Pb-C negative plates had been studied through CV and SEM in this paper, and the cycle life test of the Pb-C ultra-battery had been conducted. The results showed that the capacitance characteristics of the negative plates could be enhanced for the carbon materials were added to the conventional negative active materials. Because carbon materials were fine, the lead sulfate particles could be smaller, the sulphation of negative plate was inhibited, and the cycle life of the battery was significantly extended under the conditions of HRPSoC. The carbon materials also could play the role of ＂acid reservoir＂ to improve discharge potential, reduce the charge potential. But the addition of the carbon materials will accelerate negative hydrogen evolution rate.