Challenge

Project 2 Thermal modeling of battery pack

The function blocks used to design the model as per given requirements are as follows:

The design model is below and even the file is attached.

Subsytem : Series connection of 10 cells

The simulation is done for 3600 seconds of 10 cycles with 1C rate

During 300 K

Scope Output:

Results:

Plot 1, it shows the life cycle of battery pack i.e., its around 200
Plot 2, we can see that the current is fluctuating between +5.5 A and -5.5 A, its indicates the discharging and charging states of the battery
Plot 3, shows the SOC, initially the battery is fully charged and discharged almost to 5% and again its starts charging up to 100 depending on the input given
Plot 4 shows the maximum capacity of the battery, we can see that there is fall in capacity and its almost 5.7 Ah
Plot 5 shows the voltage of the battery and its around 16 V we can there is slight fall in the voltage during discharging
In the display we can see that the ambient temperature we have given is 300K but the cell temperature is 358.8K which is around 1.19% increase of ambient temperature

During 350K

Scope Output:

Results:

Plot 1, it shows the life cycle of battery pack i.e., its above 250 cycles
Plot 2, we can see that the current is fluctuating between +5.5 A and -5.5 A, its indicates the discharging and charging states of the battery
Plot 3, shows the SOC, initially the battery is fully charged and discharged almost to 5% and again its starts charging up to 100 depending on the input given
Plot 4 shows the maximum capacity of the battery, we can see that there is fall in capacity and its almost 5.65 Ah
Plot 5 shows the voltage of the battery and its around 16 V we can there is slight fall in the voltage during discharging
In the display we can see that the ambient temperature we have given is 350K but the cell temperature is 413.7K which is around 1.18% increase of ambient temperature

During 400K

Scope Output:

Results:

Plot 1, it shows the life cycle of battery pack i.e., its around 350
Plot 2, we can see that the current is fluctuating between +5.5 A and -5.5 A, its indicates the discharging and charging states of the battery
Plot 3, shows the SOC, initially the battery is fully charged and discharged almost to 5% and again its starts charging up to 100 depending on the input given
Plot 4 shows the maximum capacity of the battery, we can see that there is fall in capacity and its almost 5.60 Ah
Plot 5 shows the voltage of the battery and its around 16 V we can there is slight fall in the voltage during discharging
In the display we can see that the ambient temperature we have given is 400K but the cell temperature is 468.8K which is around 1.17% increase of ambient temperature

The simulation is done for 3600 seconds of 10 cycles with 0.5C rate

During 300 K

Scope Output:

Results:

Plot 1, it shows the life cycle of battery pack i.e., its around 50 cycles
Plot 2, we can see that the current is fluctuating between +2.7 A and -2.7 A, its indicates the discharging and charging states of the battery
Plot 3, shows the SOC, initially the battery is fully charged and discharged almost to 50% and again its starts charging up to 100 depending on the input given
Plot 4 shows the maximum capacity of the battery, we can see that there is fall in capacity and its almost 5.79 Ah
Plot 5 shows the voltage of the battery and its around 16 V we can there is slight fall in the voltage during discharging
In the display we can see that the ambient temperature we have given is 300K but the cell temperature is 327.4 K which is around 1.09% increase of ambient temperature

During 350K

Scope Output:

Results:

Plot 1, it shows the life cycle of battery pack i.e., its above 65 cycles
Plot 2, we can see that the current is fluctuating between +2.7 A and -2.7 A, its indicates the discharging and charging states of the battery
Plot 3, shows the SOC, initially the battery is fully charged and discharged almost to 50% and again its starts charging up to 100 depending on the input given
Plot 4 shows the maximum capacity of the battery, we can see that there is fall in capacity and its almost 5.78 Ah
Plot 5 shows the voltage of the battery and its around 16 V we can there is slight fall in the voltage during discharging
In the display we can see that the ambient temperature we have given is 350K but the cell temperature is 379.8K which is around 1.08% increase of ambient temperature

During 400K

Scope Output:

Results:

Plot 1, it shows the life cycle of battery pack i.e., its around 90
Plot 2, we can see that the current is fluctuating between +2.7 A and -2.7 A, its indicates the discharging and charging states of the battery
Plot 3, shows the SOC, initially the battery is fully charged and discharged almost to 50% and again its starts charging up to 100 depending on the input given
Plot 4 shows the maximum capacity of the battery, we can see that there is fall in capacity and its around 5.77 Ah
Plot 5 shows the voltage of the battery and its around 16 V we can there is slight fall in the voltage during discharging
In the display we can see that the ambient temperature we have given is 400K but the cell temperature is 432.1K which is around 1.08% increase of ambient temperature

Conclusion: As per my simulation model

The rise in temperature increases the life cycles of the battery pack in both the cases
Maximum Capacity falls down slightly and slowly depending on the rise in temperature in both the cases
Voltage remains almost same in both the cases
The Current varies between positive and negative as per the C rate respectively
There is around 1-1.2% increase in the cell temperature when compared to the ambient temperature
During 1C rate the SOC is nearby zero but during 0.5C rate it is almost to 50%.

Ship work like this
in your own course.