Week 5 Challenge

1) False,

As the driver is accelerating frequently the need for the voltage rises to the peak value.So UC can give the peak voltage as UC has higher power density than the battery which is good at giving the greater energy density and also the brake is applied at the regular interval so the recharge of UC can also dine from the regenerative braking which will make it more efficient in the given situaion.

2) Energy density:

Lead acid battery-85Wh,2.1V

Nickel cadmium battery -100Wh,1.2V

Nickel Metal hydride battery -220Wh,1.2V

Lithium ion-460Wh,3.7V

Ultra Capacitor-59.4Wh,2.7V

3)Power density:

Lead acid battery-150Wh,2.1V

Nickel cadmium battery -150Wh,1.2V

Nickel Metal hydride battery -85Wh,1.2V

Lithium ion-130Wh,3.7V

Ultra Capacitor-206Wh,2.1V

4) True,

During charging the lithium ion moves from the cathode towards the anode.During discharge the lithium ions moves from the anode to the cathode thus producing the current.