Quote:
Originally Posted by suicideneil
What size is that lipo pack that was tested- kinda difficult to tell / determine the voltage drop per cell & generate some actual c ratings without knowing it; 32.3v starting voltage is odd...
Imma pretend that its an 8s lipo pack ( seems if 32.3 / 4.2 = 7.6s, and its several minutes into the run, so... ) for the purposes of this post:
8s lipo = 33.6v
minimum voltage recorded is 27.6v, so thats 3.45v per cell ( minimum voltage, under maximum load )
The highest current ( load ) recorded is 178.1 amps
So, 178.1amps / 6.5amps ( 6500mah lipo ) = 27.4C @ 3.45v per cell
Thats pretty shockingly bad considering these are rated for 75C @ ...3.2v per cell say? ( since MA dont specify the cell voltage held under the 75c load ).
Well, there you go, more false claims by MA, what a suprize.  |
Neil, you math looks good, but the max load will probably happen when the cells are freshest and are able to deliver that, while min voltage will happen towards the end of the discharge cycle where the pack is weakest. This is why we need a number of current/voltage samples across the cycle to get a better data sample.