Battery Selection

nikhil27 · January 03, 2015, 09:32:00 AM

I am having brushless motor which pulls 10Amp and ESC of 30Amp. Please suggest the battery for this combination. Also tell me how to select the battery?

Eagerly awaiting for your response.Thanking in anticipation.

sooraj.palakkad · January 03, 2015, 09:44:22 AM

Warm welcome to the Forum

Which is your motor and ESC ? What count of cells do they support ?

Is this for Ornithopter ?

nikhil27 · January 03, 2015, 09:51:57 AM

it supports 2-4 lipos
Motor pulls 10 Amps at no load

sooraj.palakkad · January 03, 2015, 10:00:32 AM

you can use any battery that can give 20A continuously (To be at the safe side)

The max. current a battery can safely provide is calculated from it's discharge rating (C rating) and AmpHours (Ah) .

Max. continuous o/p current = Amp hours X C rating

ie; for a 1Ah (1000mAh) , 20C battery - the max. continuous discharge current is 20A .
and for a 2Ah (2000mAh) , 20C battery it will be 40A .

Now we have to consider how much run time you need with the battery - this solely depends on the Amp hours of the battery pack - Higher the Amp Hours, higher will be the Discharge time . But weight will also increase for more Ah batteries, so you have to select an optimum Ah pack depending on the AUW or your model.

nikhil27 · January 03, 2015, 10:04:35 AM

thank u for the reply
but can you tell the specific battery and also the website from where i could get it at lowest prices.
And the weight i want is around 200gm....

sooraj.palakkad · January 03, 2015, 10:09:18 AM

you mean 200gms battery or 200gm is your AUW ?

nikhil27 · January 03, 2015, 10:10:14 AM

200gm battery

sooraj.palakkad · January 03, 2015, 10:13:34 AM

http://rcmumbai.com/index.php/product/3s-1100mah-25c-wild-scorpion-nanotech-lipo-battery/

http://www.quadkopters.com/product/battery-and-accessories/qk-1250mah-11-1v-2550c-lipo/ : only 98 gms

http://rcbazaar.com/product.aspx?productid=3521 : 2200mAh

http://rcbazaar.com/product.aspx?productid=1266

nikhil27 · January 03, 2015, 10:15:57 AM

Battery>ESC>motor....
In this case am I right
and also which 'c' rating should be multiplied with mAh,continues or burst?

?
Thanks for reply

sooraj.palakkad · January 03, 2015, 10:22:12 AM

yes, the selected ESC should have higher current handling capacity than that of the motor needs.
The selected battery should have more power than the motor needs.
or in your terms : Battery>ESC>motor.... !!

Take only continuous C rating for calculations .

nikhil27 · January 03, 2015, 10:23:42 AM

thank you bro
You are awesome
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