Impact of Lithium Plating on the Electrothermal Stability in Battery Systems
As a high safety and long life lithium ion battery system,the lithium iron phosphate batteries are widely used in energy storage systems,electric vehicles and other important areas.Non-uniform deposition of the lithium metal in the anode occurs during cycling of the battery under different working conditions.In order to clarify the influence mechanism of lithium precipitation phenomenon on the electrothermal stability of the battery and improve the battery performance,this study designs low temperature cyclic charge/discharge experiments to induce lithium precipitation in the battery,and carries out the overcharging and heating experiments on the new and the lithium precipitation batteries and conducts comparative analysis.The experimental results show that compared with the new battery,the internal resistance of the lithium precipitation battery increases more rapidly with the increase of the overcharge capacity,and the thermal stability of the lithium precipitation battery shows an obvious correlation with its degree of lithium precipitation,with the increase of lithium precipitation degree of the battery's thermal stability deteriorates,and even thermal runaway occurs.The conclusions are important for the subsequent design optimization of the battery,the design of charging management strategy,battery failure prevention and thermal runaway warning.
lithium iron phosphate batterylithium precipitationheatingovercharging
万方数据
维普
