I'm searching for a good quality li-ion batteries for my projects.
I'm planning to build either:
A 4S5P for medium sized terrain robot.
A 6S2P Reasonable budget drone.
I found this 100x box of SAMSUNG ICR18650-22P CELLS 2150MAH. I thought I can get a big advantage of the quantity and build my batteries from these cells.
But I still don't have full understanding of how to evaluate certain li-ion cells, if they are good for me or not. Can they deliver the required current I want or not.
Can anyone tell me, for a certain cell; let's say a 3300mAh li-ion cell with internal resistance of 25 milli-ohm. What instant max current I can draw from this cell ?
From your link - Maximum continuous discharge current: 10A. However, whether this current is sufficient can only be said by you because we do not know what motors your drones use and what current consumption they have.
Then use the ones the R/c aircraft people use.
They won't be Li-ion but lithium poly..........
No sense what-so-ever playing around with 18650's as there are too many clones that simply don't work, you have to add bms, you have to get access at least to a spot welder and nickel bus then have a charger rto suit whatever combo you come up with.
Have to deal with much smaller charge /discharge limits as compared with the r/c gear as well......
lipos are more dangerous than li ions. Also I followed some youtube videos explaining the performance of li-ion, which is very good. People could fly their drones further distances, but the only downside is that it can't do powerful stunts which draw big current.
As for the terrain robot I want to develop, these types of robots don't require lipos. They need bigger capacity with reasonable current draw.
I'll use the similar systems that many people use, which is to measure the battery capacity with the controller on the drone/robot. And charge it with chargers that use power and balance cables.
I think I'll try to solder the cells with copper wires with good quality flux and the techniques used with these batteries which is to brush the layer of the cell with a rough material then it can hold a solder joint.
