Project 2 Thermal modeling of battery pack

Objective:To Simulate the Thermal Effect of 10 cell Series Lithium ion battery model & to compare the Life cycle performance at Various temperature,Charge & Discharge rates using simulink.

Required Blocks for creating Simulink Model:-

• controlled current source
• signal builder
• battery table based
• thermal source
• Convective Heat Transfer
• Thermal Reference
• Electrical Reference
• Solver Configuration Block
• PS-Simulink converter
• Simulink-PS converter
• Add block
• Scope
• integrator block
• product block

Model Description:-

• we have to connect 10 cell(table based) in series as per question the cells are connected to a controlled current source
• controlled current source is connected to a signal builder block which is set to a UDDS signal

• thermal port of cell is connected to a thermal source and heat transfer take place via convecttive hea transfer with specific area per simulation
• A temp sensor is measuring the temp diff
• Soc of the battery is calculated by coloumb counting method implemented on the model

Case 1-

temp source at 325Kelvin and convective heat transfer area is 1e^4m2

Results-

SOC

Temperature difference-

• as we can see from the results there is very little temp rise as the value of convective heat transfer is very low.
• the soc of a battery reaches value 0.96 after 1365 sec

CASE 2-

temp source at 325 Kelvin and convective heat transfer area is 10m2

Results-

SOC

Temperature difference-

• As we can see in above graph as the area is increased the temp rises to 308Kelvin
• There is not much significant change in soc as compared to previous case

Case 3-

temp source at 400 Kelvin and convective heat transfer area is 5m2

Results-

SOC

Temperature difference-

• as we can see the temp rises to 336kelvin as area and temp both are increased
• Soc still dosent see significant changes in its initial and final value

case no.	Temp source(k)	heat transfer area(m2)	run Time
case 1	325K	1e^4m2	1365
case 2	325K	10m2	1365
case 3	400K	5m2	1365

matlab file- https://drive.google.com/file/d/1QsC319mkwCHN1DnTUhKYXJ9fcOuCbevW/view?usp=sharing

Conclusion- study completed