Challenge

Project 2

CCharan Kumar Maragani21 Sept 2022

OBJECTIVES

Using MATLAB/Simulink and the drive cycle from the attached excel sheet, find-

The max heat generation of the battery
The SOC of the battery at 2 *104second of the battery operation

Time	Time Step	Battery Current
00:00.4	0.1	-0.9632
00:00.5	0.2	-0.952
00:00.6	0.3	-0.9072
00:00.7	0.4	-0.9632
00:00.8	0.5	-1.0304
00:00.9	0.6	-0.9632
00:01.0	0.7	-1.0304
00:01.1	0.8	-1.008
00:01.2	0.9	-0.9856
00:01.3	1	-0.9632
00:01.4	1.1	-0.9184
00:01.5	1.2	-0.9296
00:01.6	1.3	-0.9296
00:01.7	1.4	-0.9296
00:01.8	1.5	-0.9184
00:01.9	1.6	-0.9408
00:02.0	1.7	-0.896
00:02.1	1.8	-0.9072
00:02.2	1.9	-0.9072
00:02.3	2	-0.9408
00:02.4	2.1	-0.9296
00:02.5	2.2	-0.9296
00:02.6	2.3	-0.9968
00:02.7	2.4	-0.9968
00:02.8	2.5	-0.9408
00:02.9	2.6	-0.9408

Battery resistance

2 milli ohm

Consider the battery resistance is 0.5 mOhm, delta time is 0.1 and entropic factor is 2

ANSWERS

) The SOC of the battery at 2 *104second of the battery operation.

Answer:-

Step1) Prepared an excel sheet with time and current values given.

https://docs.google.com/spreadsheets/d/1FmMhjR0nzgV8yFov1MQ-WhcpuYKjT2gd/edit?usp=sharing&ouid=101482956916689432206&rtpof=true&sd=true

Step2) Import above excel sheet in Matlab.

battery.

blocks used :

1) Battery :

Here the battery block can be found in the director of electrical/specialized power systems/electrical drives/extra sources
Here we used default values of the Li-ion battery.

2) Controlled voltage source:

3) Bus selector

4 Drive cycle:

Signal builder values:

The data above in the excel format was put into the signal builder block.

Converting this signal to aphysical signal through Simulink-PS converter block it is given to the controlled current block.

Another terminal of this block is connected to battery.

The temperature and current with respect to time of the battery is measured and displayed in the scope through its respective sensors i.e Temperature sensor and Current sensor.

thermal reference and electric reference are connected to their sensor circuit.

A Solver configuration block is added for definining solver settings to use for simulation.

Result:

Scope result shows the temperature and scope result with respect to time having delta time as 0.1.

which shows maximum heat generated and SOC.