Challenge

Project 5

AAnagha T K12 Sept 2022

AIM: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.

Block used: Pulse generator,Power gui,controlled current source,battery ,constant,bus selector ,voltage measurement,and Coulomb counting subsytem

Pulse generator:

Pulse genertor generates pulses according to given parameter.

Battery

Here we use 10 battery .with nominal voltage 7.2 and rated capacity 5.4Ah we selected simulating temperature and aging effect simulation

Controlled current source

The Controlled Current Source block represents an ideal current source that is powerful enough to maintain the specified current through it regardless of the voltage across the source.

The output current is I = Is, where Is is the numerical value presented at the physical signal port.The positive direction of the current flow is indicated by the arrow.

Constant block

This block generate a constant value

we set constant value 25 for ambient temperature

Voltage measurement

This block measure voltahe across terminals

Bus selector

This block accepts a bus as input which can be created from a Bus Creator, Bus Selector or a block that defines its output using a bus object. The left listbox shows the elements in the input bus. Use the Select button to select the output elements. The right listbox shows the selections. Use the Up, Down, or Remove button to reorder the selections. Check 'Output as virtual bus' to output a single bus.

Scope

The scope block display signals generated during simulation.

Coulomb counting subsytem

Here we use coloumb counting formula for calculating State of Charge

we know

SOC(t)=1/C ∫ i(t)dt

Where c is the total capacity

i(t)=current

We develope the block digram to calculate soc from above formula as follows output from controlled current source to subsystem and we got soc output,here we gave c=5.4*3600,we know current capacity of battery is 5.4Ah

All the blocks are connected as follows to get 10 cell series battery pack

We connected a current measurement and resistance across terminals of the battery pack to know current and voltage value and run the simulation for 0 sec

Then we got battery pack voltage=73.8 V which is 10*voltage of single cell

and current flowing through the 1ohm resistance=73.8A

for calculating soc of battery pack and single cell following arrangements are done

Result:Run the simulation for 100 sec and following results are obtained.

SOC of battery pack

Battery is discharging as time increases
Initially battery is fully charged and battery got discharged with time and 99% battery is remaining
At some portions of the plot we can see increase in soc value because direction change of controlled current source battery get charged.so soc increses

Voltage variation of battery pack

Battery pack voltage decreses with increse in time its go up for directionchange of current source output

SOC ,current,voltage and maximum capacity plot of a single cell

SOC decreases with increasing time
current follows the controlled current source value given by a pulse generator
voltage decreases with increase in time
we got maximum capacity of battery 5.58Ah

Conclusion:10 series cell battery pack is created in simulink and results are plotted.

Project 5

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in your own course.

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Ship work like thisin your own course.

Talk to a career counsellor

Ship work like this
in your own course.