Project 2 Thermal modeling of battery pack

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

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Ans:

Charging and Discharging sorce:

here we use current control sorce to make a charging and discharging state for holl circuit which make the circuit charge and dischage with 50A load current and 1/600 frequency.this is nothing but control of battary state.

Battery cell:

we use normal battery cell and we add thermal port to measure the battery tempareture.

Heat transfer elemant:

This two elements are heat transfer eliment its behave like heat rediator which rediate the heat from cell body to environment.

Heat sorce:

This is the heat sorce elimant which make the heat or keep the tempareture of embient tempareture.

For this example we take the ambient tempareture as 293 K.

Tempareture sensor:

we use this circuit as tempareture sensing circuit.

we arrange total 10 nos of cell in series for make battery pack and make max charging voltage 40 volt and min volt 26 volt.

Parameters:

we take 10 nos of cell as series connections and total circuit charging and discharging with 50 A and 40 volt.

We take the charging current as 50 A.

We chose frequency of charging and discharging current is 1/600.

Here we show that , we take the tempareture as 20 degree

Circuit:

Here is the circuit.

Here is the graph of charging and discharging state with voltage and tempareture.

Here we shos that the at max charge time the cell voltage is 40 volt and max discharge time battery voltage become 26 volt.

with respect with time the tempareture rise but the graph with harmonics its mean the tempareture up in charging time and decrises in discharge time.

also we show the charging and discharging voltage state with charging and discharging current.

We change the ambient tempareture to 273 K and 10 sec.

We change the ambient tempareture to 400 K and 10 sec.

We change the ambient tempareture to 600 K and 10 sec.

Clearly we shase that the cell tempreture is incriesed with embient tempareture.For our result we show very smoll diffarance but as othe paramiters tre result will more.