hey i have my project presentation on wednesday .......
if i have any thing in mean time , i will ask u

OK. I hope it goes well.

 

why dont we consider inductance for batteries impedance at high frequencies ?

isnt it necessary?

 

is my understanding about capacity correct ie 7.2AH

is the specific energy in AH that battery can deliver over time

eg if for 10 hours .......-----0.72amps load for 10hours until its terminal voltage drops to 10.5V

and C-rate ? (i am having some issues with this term)

thank u

 

why dont we consider inductance for batteries impedance at high frequencies ?

isnt it necessary?

Usually a bypass capacitor would be connected in parallel with the battery to keep the high frequency currents (if there are any) out of the battery, so it doesn't matter what the battery impedance (inductive or capacitive) is at high frequencies.

 

is my understanding about capacity correct ie 7.2AH

is the specific energy in AH that battery can deliver over time

eg if for 10 hours .......-----0.72amps load for 10hours until its terminal voltage drops to 10.5V

and C-rate ? (i am having some issues with this term)

thank u

Have a look at: http://www.engineersedge.com/battery/capacity_battery_ratings.htm

There are other web pages about battery technology.