Study on the Safe Discharge Method of Waste Lithium Battery Pretreatment
Residual power release is an important pretreatment step to prevent thermal runaway from occurring in the recycling process of used lithium-ion batteries,and chemical discharge is the most studied method of lithium-ion battery residual power release.However,the problem of corrosion and pollutant release during the chemical discharge reaction has been neglected.In this paper,the discharge reaction of used lithium batteries in different solutions is studied in detail.By testing the discharge reaction of 14 different solutions,it is found that most of the solutions have good discharge effect,and different types of salt solutions have different discharge mechanisms.CuSO4 solution is a potential discharge medium with excellent comprehensive performance,and the use of this discharge solution greatly reduces the electrode corrosion,and the battery cyclic discharge test verifies the feasibility of the discharge strategy,which is of great significance to the recycling of used lithium batteries.
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