Project 2 Thermal modeling of battery pack

AIM

To simulate the thermal effects and compare life cycle performance at various temperatures, charge & discharge rates for a 10 cell series lithium ion battery model, using MATLAB.

Objective

To analyze temperature and life cycle parameters of the 10 cell series battery pack.

• Connect 10 cells in series analyze the response to a cyclic charge and discharge source.
• Change the ambient temperatures of the battery pack and compare the performances.
• Add the fading parameters of the battery and analyse the performance after each charge/discharge cycles.

Explanation:

As given in the question the 10 cells are connected in series battery pack.

The blocks used here are:

1. battery(tabel based).

2. Controlled current source.

3. Voltage sensor.

4. current sensor.

5. Integrator block.

6. Gain block.(1/2.4*3600)

7. 2 constant blocks

>constant block of value 2.4 and

>constant block of value 1.

8. Subtract block.

9. Temperature source.

10. Temperature sensor.

11. Convective heat transfer.

12. ps simulink converter.

13. Solver configuration.

14. Electrical reference.

15. Thermal reference.

All the above blocks are used to create a model with proper connections and the model is runned for 3600secs and with ero error the model is perfectly done.

The required area is assumed and and can be changed accordingly and also the temperature.

The following are the plots we got:

Plot of Temperature:

As we can see there is a sharp rise in the temperature till 3600 and it gets stable.

Plot of voltage:

As we can see there is voltage drop.

Plot of SOC:

Here also we can see the drop in State of charge.

Conclusion:

MATLAB library model parameters were evaluated for its life cycle and thermal effects parameters. A battery pack with 10 cells connected in series also made with a source of charging and discharging cycle.

Reference:

The matlab file has been attached below.