Research on Pulse Heating Performance of Lithium Iron Phosphate Batteries for Electric Vehicles
The performance of lithium iron phosphate batteries decreases in low temperature environment,which leads to the prolongation of charging time and dynamic attenuation of electric vehicles,which seriously affects the user experience.The battery self-heating technology based on pulse heating can effectively improve the performance of batteries in low temperature environments,and has the advantages of fast heating speed and small temperature difference,so it has attracted extensive attention.In this paper,the temperature rise effect of lithium iron phosphate batteries under different initial state of charge(SOC),initial temperature,cut-off temperature,power and other conditions is studied through special experiments on pulse heating performance,and the relationship between ambient temperature,battery state and temperature rise rate is clarified,and the problem of unclear relationship between the key parameters and state of battery and electric drive and pulse heating effect is solved.This study provides an effective technical route for battery thermal management of electric vehicles in low temperature environments,and has important engineering application prospects.
Electric VehicleLithium Iron Phosphate BatteryPulse HeatingLow TemperaturePerformance
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