Project 2 Thermal modeling of battery pack

I am online student from EV batch -16

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.

• Thermal protection is necessary for a battery pack which leads to high efficiency and safe operation.

• A battery management system is taking charge to measure voltages, current, temperature and performance during charging and discharging and hence thermal management is used to calculate each cell's temperature.

• This Simulink model reflects the information about cell temperature when a load is connected.

• When any fault occurs it shows in the output and the measurement port measures the parameters.

As shown in the figure at temperature 293.1K fluctuation is there in cells 1 to 4, cell 5 and cell 6 1o 10. But cell 5 to 10 has more distortion compared to other cells to fault is reflected.

SOC plot and thermal behaviour of the battery.

Cyclic Charging and discharging profile of battery pack. The current peak is at 50A while discharging and while charging voltage is at a maximum near 43V.

Conduction of battery is a heat flow rate vs temperature difference.

The convection process is also between heat flow rate and temperature.

Simulink model

https://drive.google.com/file/d/1z7jPuthGu-mjm5mSDK3A_zrrncWV9quH/view?usp=sharing