Project 5

For a 10 cell series, calculate the voltage, current and SOC. Also simulate the aging and thermal effects at different charge and discharge rates. Comment on the battery pack’s capacity.Project 2: Thermal modeling of the 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.

Solution:

Component Requirement:

1. Battery (Table-Based)

to activate the SoC and Thermal Property Click on the battery block then this SIMSCAPE BLOCK will appear then go to simscape block >> Block Choice>> instrumented | Show thermal port

Thermal Reference

Temperature Sensor

Convective Heat Transfer

Temperature Sensor

PS-Simulink Converter: to convert some physical quantity to Simulink data

Electrical Reference

Solver Configuration

Goto block

From Block

Scope for output waveform

Controlled Current Source for Discharge the battery with some constant discharge current

10 cell series lithium-ion battery schematic diagram:

Circuit Diagram:

I am Testing the series batteries with the constant discharge current on different operating temperatures ranging from 300K to 390K.

Temperature Chart:

K	degC
300	26.85
330	56.85
360	86.85
390	116.85

The result on 300K temperature:

The result on 330K temperature:

The result on 360K temperature:

The result on 390K temperature:

Comments:

K	degC	SoC%
300	26.85	14.6%
330	56.85	14.3%
360	86.85	7.14%
390	116.85	2.38%

As you can see the with the rise in temperature the SoC decreases which means that if we operate the battery at a high temperature than the rated temperature then the battery will discharge fast and

the life of the battery will decrease accordingly.