Hi,
We ordered a Mantis 4WD Off-Road Rover Kit (product code: RB-Sct-921).
We would like to know what capacity of battery is necessary for a function under load (4-5 kg) and an autonomy of 2 hours.
Thank you in advance for your return.
Best Regards,
Sonia Djebroun
AGCNAM
Order number: [highlight=#ffffff][font=arial, sans, sans-serif]n°3-2016-11-08-robotshop[/font][/highlight]
robotshop.com/en/mantis-4wd- … r-kit.html
The discharge current always relates to the usage - is it turning a lot? Going up and down terrain? Carrying a heavy load?
The stall current of the motors is 20A, so you can assume around 2.5-5A continuous per motor, or 10-20A for all four motors.
Therefore at 12V, 12A, you’d need at least 12V, 10Ah battery for one hour, or a 12V, 20Ah (or two 12V, 10Ah) for two hours of continuous use, which is on the large side.
Given that this platform has a passive suspension system, it’s quite possible that two 10Ah battery would cause it to sag quite a bit.
We would suggest starting with an 11.1V (3S) LiPo. Unfortunately the manufacturer does not give data on the payload capacity.
robotshop.com/en/lithium-pol … packs.html
We are looking to enter such batteries (higher capacity LiPo) but do not have any at this time.
