01-30-2010 11:20 AM
Hello everyone. I am a year 3 student of EE and i am doing a final year project about state of charge of lithium ion battery.
Now i want to know the capacity of battery discharged so i develop a program and a current adjust button to adjust the dischrage current.
But here is a problem. I dont know how to find the area of the graph under the dischage current against time.
Can anyone help me plz ??
01-30-2010 11:41 AM
You would just integrate your data, there's a VI for that. 🙂
What is the datatype of your curve (array, waveform, dynamic, etc.)?
Can you attach a simplified version of your actual VI and some data?
01-30-2010 12:07 PM
actually i use GPIB card to link the load and the computer together, so i cant give a simplified verison for u.
But the full version is still easy to read .
I use a bundle to combine the the two readings together.
01-30-2010 12:27 PM
01-30-2010 11:31 PM
yes i know i * dt but as the discharge current changes, i dont want the time to accumulate with the previous discharge current time. That 's why it annoy me a lot and i dont know how to use those integration vi as those need a waveform input but in my program the waveform is just a bundle of current and voltage. Can i still use the vi to do that ??
02-03-2010 03:58 AM
Hi there,
You can split the data into several parts, and bundle the data to waveform datatype and use integral vis in LV to fulfill the job.
NISH AE
Fortune