Project 5 - Thermal system of battery.

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.

Answer -

First of all we take 10 batteries for the connection of series the we connect them, also we connect scope and other parameters to give desired out and helath of battery.

after that we take input from an excel file to read and usage of our current of battery on basis of that how it to be used in our daily life. so we connect bateries as shown above in series with the bus selector to the scope to get desired output for our graph.

1) Battery - we use generic battery for our model and the values of that give as it is we take from blocks.

we only change the aging sampling model to 20s because as we want we get this for calculation.

2) square wave generator - we use square wave generator with below values and get signal from drive cycle for our model.

* Observation - Below we can observe the graph that shown us to , how the discharging does after the 2 hrs of time we given for our model. After 2 hrs the model run with time and current get desired output given by input in excel file to read from square wave generator . soc rate goes down from 100 to 0 after its capacity has to be little slow with timer, and temperature goes higher because of using batteries like that so its go higher to 50 degree celcius also it varies the voltage with some time of usage. After all we can get our output as we want per requirement and also see the discharging rate.

cell temperature goes high like its usage in model, and soc will decreasing. Like that we can also check putting initial value of charge 0 for how charging goes up and how can get desired output of model also temperature increase with current going and voltage varying.

conclusion - we can conclude that as per discharging , the soc will decrease and therefore usage of batteries current goes through with high cpacity and voltage varying by usage , so the temperature goes high with the usage. The capacity and aging of battery will decrease day by day after usage like that.

Thanking you.