Samsung 18650 30q 3000mah 18650

[Green Werks]

Samsung 18650 30q 3000mah 18650
Can some one tell me how many of these batteries I would have to buy to make a 52v 20ah battery pack
Hope this is a good place to ask Thanks

[Jon]

string of 14S for 52v times 7P for 21ah, so 14x7 = 98. Make sense? I think S stands for series and P stands for parallel.

[Rodney64]

84 for a 14p 6p pack. best to purchase a few extra in case you damage one. This will be a little over 20ah. 7p will be 3ah more

[Green Werks]

Man Thank you fellas I did some more reading and with your help
I have finally put it tougher
I just could not see at first 2x2=4 duh.
I guess I've got the right avatar at least

[Green Werks]

I did something thinking and this is what I came up with
Tell me if I am on track or do I need to go back to the books
So if I built a 20S5P battery out of these cells I would have a 72.2v 15ah pack
Is this right or am I totally lost
Thankx Bill.

[Jon]

How did you come up with 72.2v for a 20S pack?

[Green Werks]

How did you come up with 72.2v for a 20S pack?

I am new to all of this and trying to learn but from what I seem to understand that a
row of 20 3.6 volt batteries in series is 72 volts although I could be wrong
would not be the first time and 5 of these in parallel is 15 ah

[1 cog missing]

3.7 volts is the nominal voltage of the cells but they will charge to 4.2 volts.

Ten cells in series is called a 36 volt battery but fully charged it is 42 volts, a 48v (13 in series) battery is actually 54v fully charged.

So 20 in series will give you 84 volts fully charged.

most controllers can not handle that. make sure your controller can handle more than the fully charged voltage.

[commuter ebikes]

I agree with the 14s7p answer. Fully charged voltage is 58.8V, nominal voltage is 51.8V. 21Ah capacity.