when calculating battery amp hours


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floydR

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Aug 23, 2017
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Do you add all your cells in parallel or go with the lowest mAh x number of cells in parallel?
say we have 100p 99 of them are 2000mAh and one is 1900mAh.

99x 2000 +1900 lowest cell x 100
198000 +1900= 199900mAh /199.9 Ah or 1900 x 100 =190000 /190 Ah

doesn't matter if the series connections is 3,4,7,10,14

later floyd
 

Korishan

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Generally the mAh of the cells in parallel will be the average of the capacities.
 

daromer

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No idea what you are mixing? A packs Ah is the sum of all cells Ah.

If you then hook up several packs lets say

10Ah <-> 12Ah <-> 15Ah

So you got 3 in series the lowest pack is what will determine useable capacity (Unless you run with active balancers bla bla.... Not really useable still)

So basically 10Ah useable. So just make sure you random or put the cells even so you get somewhat close and its not a problem
 

floydR

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Aug 23, 2017
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daromer said:
No idea what you are mixing? A packs Ah is the sum of all cells Ah.

If you then hook up several packs lets say

10Ah <-> 12Ah <-> 15Ah

So you got 3 in series the lowest pack is what will determine useable capacity (Unless you run with active balancers bla bla.... Not really useable still)

So basically 10Ah useable. So just make sure you random or put the cells even so you get somewhat close and its not a problem
Thank you, This was what I was trying to understand.I used 100 parallel and 2000 mAh, 1900 mAh because it simplified the math.

The sum of the cells in parallel equals the ah of the pack,the lowest pack ah determines the ah of battery.
later floyd
 
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