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cell matching brand new 18650
#1
Hello,

I'm wondering if it's necessary to cell match brand new INR18650-35E batteries? I've tested few and they're +/- 30mah with each other.
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#2
I would not match new cells unless it is for HIGH current applications
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#3
(10-06-2019, 04:34 PM)daromer Wrote: I would not match new cells unless it is for HIGH current applications

I will be pulling max 3A per cell, that counts?
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#4
(10-06-2019, 06:08 PM)saffire21 Wrote: I will be pulling max 3A per cell, that counts?

https://www.orbtronic.com/content/samsun...50-35e.pdf
Model: INR18650-35E
Size: 18650
Chemistry: INR
Nominal Capacity: 3500mAh
Continuous Discharge Rating: 8A
Max Discharge Rating: 13A

3A would not be considered HIGH current for these cells. 8A is standard, 13A would be.
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#5
(10-06-2019, 04:18 PM)saffire21 Wrote: Hello,

I'm wondering if it's necessary to cell match brand new INR18650-35E batteries? I've tested few and they're +/- 30mah with each other.

How accurate is your test equipment ?

The negligible +/- 30mAh is likely a combination of a slight cell capacity difference and your testers inaccuracy and repeatability.
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#6
High current is when you max out the cells and the ir really start to come to play
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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#7
Well the more cells you put in parallel the less the need for matching.
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