锂电池钝化膜的消除方法与实现

Research and Implementation of Method for Removing the Solid Electrolyte Interface in Lithium Battery

锂电池在静置储存一段时候后,会发生电压滞后的问题,其原因是电池内钝化膜(SEI)的存在。在探究钝化膜产生机理和消除方法的基础上,选择放电击穿法来实现消除目的,并提出选时激活定时检测的锂电池钝化膜消除方案。利用DSP、FPGA、RS232串口通讯、VC++等技术构建了锂电池激活检测系统,并完成了软硬件的设计。实验结果表明:该方案可有效解决锂电池电压滞后的问题,并具有功能完善,通用性好,电量损耗小,交互性好等特点。

The reason of the voltage-delayed-appearance on using the stored lithium battery for a period is the existence of the solid electrolyte interface （SEI） interior battery. Based on the research of the generation mechanism of SEI and the method of its removal,the researcher selects the technique named discharge breakdown and proposes a solution for activating electro-discharge at a chosen time. The design of software and hardware system for removing the SEI of lithium battery has been done by constructing the activated and measured system correlating the several techniques such as DSP, F P G A, RS232, VC＋＋and so on The natures of the design, including the functional perfection,good generality,less energy loss and interface friendliness,and the experimental results proves to be the proficiency system for solving the problem of the voltage-delayed-appearance lithium battery.