激光清洗废旧锂离子电池电极片的理论与实验研究

With the wide use of electric vehicles, a great deal of spent lithium-ion batteries not only seriously pollute the environment and cause great waste of energy and resources.The method of laser cleaning is proposed for re manufacturing cathode from end-of-life of lithium-ion batteries in this paper.Deposition of passive solid electrolyte interface (SEI) layers on the electrodes of electric vehicle battery (EVB) causes fast capacity loss and recharge-ability reduction of the battery. Nd:YAG pulsed solid state laser was used to ablate SEI from surfaces of the electrodes. This paper has established the heat conduction model and obtained the temperature distribution function during the cleaning process.The experimental results show that the optimal pulse laser energy density is 0.142J/mm2 under current experimental conditions.