Design of heat tracking system for charge and discharge of lithium-ion power battery
To construct the adiabatic environment required for measuring the heat generated by charging and discharging 18650 lithium-ion power battery at 1 C times at room temperature,a lithium-ion power battery charging and discharging thermal tracking system is designed,which uses the battery temperature as the target and makes the ambient temperature follow the strategy.The system uses the STM32 microcontroller as the controller and the LM2596 power management chip as the core device of the adjustable power supply.A silica gel heating sheet to heat the adiabatic temperature control chamber is adopted.We use Matlab to identify the model of the thermal tracking system and apply Smith's prediction fuzzy PID algorithm for control.The simulation and experimental results show that the maximum tracking error between the battery temperature in the adiabatic chamber and the ambient temperature is no more than 0.5℃,which has the advantages of fast response and small error,and can meet the demand for heat generation measurement of 18650 lithium-ion batteries when they are charged and discharged at 1 C multiplier at room temperature.
thermal trackingadiabatic environmentSmith predictorfuzzy PIDadjustable power supply
NETL
NSTL
万方数据
维普
