Project 2
PROJECT- part(a)
There are 2 heat sources for the battery heat generation
- Joules heat
- Entropy heat
Heat generated = Joules Heat + Entropy Heat
when a current flowing through a resistance, there is a heat dissipated in the resistor. This heat dissipation is called Joule heating. Joule heating is also known as ohmic heat
Joule heat,
H = I^2*R*t
where. I = Current
R = Resistance
H = Heat
t = Time
Entropy Heat:
The heat generation due to entropy change inside a battery occurs when electro chemical reactions are performed. The entropy heat is reversible heat resulting from change in open circuit voltage with respect to temperature at two Electrodes.
Given data
Battery resistance = 0.5 mOhm = 0.0005 Ohm
Maximun current = -0.896 A
Max current time = 1.7 sec
Entropic factor = 2
Total heat generation = Jouleheat + Entropy heat
The maximum heat generation in the battery pack
Max heat generation = Max Joule Heat + Entropy factor
Max Joule Heat = I^2 *R*t
Max Joule Heat = (-0.896)^2*1.7*0.0005
Max Joule Heat = 0.0006823936
Max heat generation = 0.0006823936 + 2 = 2.0006823936 Jouls
part(b)
CONCLUSION: here as one can see soc of the battery comes out to be 100% while running for 208sec it is happened because all current value is negative means regenerative braking has occurred which lead to charging the battery instead of discharging.