Week 5 Challenge

Question 1:

Consider a scenario where an aggressive driver is accelerating very rapidly and braking harshly in a city driving. Is battery better a choice to supply power than UC in this scenario?

1. True
2. False

Why?

Sln...

The statement above is false the drivers driving pattern can be conclude here as short power transients Driver is accelerating and we all know hoe the power demand shoots up at the time of acceleration though for a short time This power is onlu needed when we are accelerating it is still dominant amongst all even though we need this power for short time only.

Battery can supply this demand but the cost of manufacturing such batteries is extremely high On the other hand Ultracapacitor holds very high power which it releases on demand and it can get charge quickly too. this quality of having high power density makes the Ultracapacitor a perfect choice of power source for such transient power demands.

Question 2:

Consider the following components.

1) Lead acid battery 2) Nickel cadmium battery 3) Nickel Metal hydride battery 4) Lithium ion (specify chemistry) battery 5) Ultra Capacitor

Note: In case of a range of energy density, take the average value for the plot.

Create a plot with energy density on the X Axis and cell voltage on the Y axis.

Comment on the capabilities of these batteries based on the plot created.

Question 3:

For the above-mentioned components on the same plot (retain the previous plot) created in the previous

Create a plot with power density on the X axis and cell voltage on the Y axis.

Sln..

A Plot of Energy density Vs. Cell VOltage is shown below.

Ultracapacitor:- It can be seen that UC Cant be used for high energy demanding applications its voltage is greater than that of lead acid NICd and NiMH. They are widely used in Electric or hybrid vehicles. to provide a quick burst of acceleration over short distance or to start the main motor.

NiMH & NICd:- Nickel metal hydride and Nickel Cadmium have almost similar cell voltage value but energy density of NiMH is very high than NiCd NiMH batteries are highly recommend in applications that call for long duration but not a high amp load. Nicd are best suitable for portbale power application

Leas Acid:- A batteries has low energy density as compared to NiMH and NiCd but cell voltage value is high Leas acid batteries are used in emergency lighting and to power sump pumps in case of power failure They were the first choice of energy in BEV but now they have been replaced by other batteries cause they require frequent maintenance.

Lithium Ion:- There are many types of lithium ion battery They are mainly classified on the basis of cathode material used cause anode remains same in all the cases in plot we have shown the average energy density of it. Now lithium is widely used in Evs Mobile phones and many more application They rule the above plot cause they have high energy density and high cell voltage as well amongst all.

A Plot of power density Vs. Cell voltage is Shown below

Surprisingly there is very less data available related to the power densities of above shown ESS GEneraly the values lies between a certain range but the plot shown above represents the average value.

Question 4:

Consider the following scenario:

A battery has just been manufactured in the battery and has been connected to a charger for the first time. The electrode marked as (1) in the picture below is the negative electrode.

1. True
2. False

The statement above is true because during charging process electrode loses the electron and this electron travels to the anode as a reverse voltage is applied. to the battery We should remember that in almost all the electronics devices cathode is -ve and anode is +ve but battery being the active material has cathode termed as +ve and anode as negative Thats why behaviour of electodes in batteries is explained in two ways. i.e. while charging and discharging Below fig represents what has been theoretically said.

Conclusion:

Aggressive driver and the power/ energy source choice

cell voltage Vs Energy density of various Ess

Cell voltage Vs power density of various Ess

Negative electrode in battery

Those above assigment successfully submitted.