1
\$\begingroup\$

Im just a little bit confused wether if LiFe batteries will work the same with an ESC (Electronic Speed controller)

Whats making me confused is that in the description they only talk about LiPo batteries but as I understand LiFe and LiPo work the same, just differences is discharge rate and density.

ESC

In the description it says:

... can handle up to 12S Lipoly.

And then in thespecifications it says:

Input Voltage: 5-12 cells lithium battery or 15-36 cells NIMH battery.

So im a little confused with what they mean.

\$\endgroup\$
1
  • \$\begingroup\$ Once upon a time, this thing might have had an actual voltage input range on it. But you should be fine, provided your cell voltages fall in the same range as LiPo cells. NiMH cell voltages are different, hence the separate specification. \$\endgroup\$
    – user39962
    May 24, 2015 at 2:21

1 Answer 1

2
\$\begingroup\$

Short answer:

Yes, you can use up to 15 LiFePo4 cells in series (aka 15S) at the input of the ESC without any problems.

Long answer:

LiFePo4 cells definitely work all Lipo ESCs... as long as you don't exceed the max input voltage of the ESC.

Your specific ESC lists that it can handle 12S Lipo batteries. This means, it can take an input voltage is greater than >50V (>4.2V*12). This is also the reason it states that you can use up to 36 NIHM cells, which are 1.5V peak voltage (1.5v*36 = 54v). 54V is the max input voltage for this ESC.

This means, you can use 15 LiFePo4 cells in series without exceeding the input voltage rating. The peak cell voltage for LiFePo4 cells is bit over 3.5V/cell... so 3.5v* 15 = 52.5v (which is below the max rated volatge)

More details:

The internals of an ESC are switching power regulators, which output a frequency modulated AC to the motor (except sometimes cheap BECs, are linear regulator, which get super hot). The switchers compensate for any battery sag, allowing you to pretty much put in any non-alkaline cells at the input (because alkaline batteries have way too much ESR). The only way to damage the ESC is to exceed the max input voltage. Some ESC may list the actual voltage, while most just list the max number of LiPo cells that the ESC can take.

\$\endgroup\$
0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.