Project 2 Thermal modeling of battery pack
AIM :
To model for a 10 cell series lithium ion battery model, simulate the thermal effects and compare life cycle performance at various temperatures, charge & discharge rates using MATLAB.
OBJECTIVE :
Model and simulate the 10 series lithium ion battery. simulate Thermal effects of a battery and comparision of life cycle pperfomance at various tempreatures. Also find the charge and discharge ratings of a battery.
PROCEDURE :
The model of this project need to use several simulink blocks that involves electrical, thermal and simulink blocks. Blocks that are needed for this model.
BATTERY, CONTROLLED CURRENT SOURCE, CURRENT SENSOR, VOLTAGE SENSOR,ELECTRICAL REFERENCE, SOLVER CONFIGURAION, INTEGRATOR, CONSTANT, SUBSTRACT, TERMINATOR, GAIN. For thermal TEMPREATURE SENSOR, CONVECTIVE HEAT TRANSFER, TEMPREATURE SOURCE, THERMAL REFERENCE and similarly SCOPE FROM GOTO PS-SIMULIMK CONVERTORS. These are the blocks which are going to use to build the model.
The connections of this model used a table based battery and connected one its negative terminal to positive terminals like wise 10 battery are arranged. The 10 series connection battery is connected to controlled current source, current and voltage sensors. on other side of the battery the Thermal port is modeled and connected to the thermal circuit. For the results the scope block is used.
BLOCKS PARAMETERS
SIMULINK MODEL
The model is designed and parameters are given. The battery capacity is about 27 Ah current source is given as 27 ah. Im going t discharge the battery in 1c rate. In order to that im going the saw how the voltage, tempreature and soc is acting. after that im going to give different tempreature values to the model then i can saw that high tempreatures are effecting the soc and voltage of battery. The is set to run one hour i.e 3600 sec.
RSULTS :
The graph shows soc, voltage and tempreature of 10 cells connected in series.
In this above graph battery is discharging the 100 to 0. The voltage is getting decreased to some 39.8 to 33.5 approximatly and the tempreature is also raising to above 306. The voltage and soc is get decreased and the temp of cells also observed. now the inecresed the tempreature values to 400 and 550 kelvins.
The graph shows that how the voltage and soc's are varrying with tempreature.
CONCLUSION :
Hence the 10 cell series lithium ion battery has been modeled, simulated the thermal effects and life cycle performance at various temperatures, are also compared using matlab.