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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
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#7
Well the more cells you put in parallel the less the need for matching.
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daromer (10-07-2019, 04:55 AM), kevinjaye (10-07-2019, 02:08 AM), nickydw (10-10-2019, 10:33 PM), OffGridInTheCity (10-07-2019, 02:32 PM), ma3006he (10-08-2019, 08:04 AM), Lucan (Yesterday, 02:41 AM), poolizei (10-08-2019, 01:44 PM), James-w (10-08-2019, 10:14 PM), saffire21 (10-10-2019, 09:19 AM), Sabrin (10-06-2019, 06:47 PM), Adrien (10-11-2019, 07:47 PM), BatteryMooch (10-07-2019, 02:03 AM), TahoeJoe (Yesterday, 07:55 PM), xyoung347x (Yesterday, 02:56 PM), Fulstein (10-12-2019, 01:47 PM), newone972 (Today, 08:49 AM), RikH (10-07-2019, 01:47 AM), Sean (10-07-2019, 06:36 AM), Korishan (10-07-2019, 02:28 AM), jdeadman (10-07-2019, 03:59 AM), Geek (10-08-2019, 01:25 AM), ChrisD5710 (10-07-2019, 07:37 AM), Oz18650 (10-07-2019, 01:15 PM), gpn (10-06-2019, 06:12 PM), Crimp Daddy (10-10-2019, 06:24 AM), jonyjoe505 (10-07-2019, 03:52 AM), Redpacket (10-07-2019, 04:42 AM), Ibiza (10-07-2019, 02:00 AM), Jim Jr. (10-06-2019, 09:56 PM), w0067814 (10-06-2019, 09:42 PM), ajw22 (10-07-2019, 04:39 AM), Zennen (10-13-2019, 12:56 PM)

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