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2A discharger to test my prismatic cells
#1
I am about ready to start testing my heap of prismatic cells.

I can charge them with my lipo charger, but discharging is a problem.

I want to capacity test at 2A. Anyone advice on a decent tester? Preferably not too expensive
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#2
(08-16-2019, 05:19 PM)Ivo Staelens Wrote: .........I want to capacity test at 2A. Anyone advice on a decent tester? Preferably not too expensive..........
Ivo,

First define expensive.If you earn 10,000 a year 100.00 is expensive.
If you earn 100,000 a year 100.00 is not too expensive. Tongue

If you are in the later then the Icharger x6  at ~120.00 is a very good unit.
Besides also charging your batteries (which you already have taken care of) it will discharge your batteries with settable parameters and log it to a sd card or your PC.
Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 8/7/2019
Total Number of Cells Recorded and processed                 6149
Total Cells required for PowIRwall                                   2856
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   2760
For Info Google Drive
Not your average Wolf       
            Cool
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#3


I bought this
Wolf likes this post
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#4
Perfect! Big Grin
Ivo Staelens likes this post
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 8/7/2019
Total Number of Cells Recorded and processed                 6149
Total Cells required for PowIRwall                                   2856
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   2760
For Info Google Drive
Not your average Wolf       
            Cool
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#5
(08-17-2019, 01:56 PM)Wolf Wrote: Perfect! Big Grin

Thx!
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#6
I bought a similar one.
With discharging stay with it.
I let that thing discharge overnight, to see what the total capacity of the pack was.
Next morning i found a pack discharged to 1.6v!

https://www.aliexpress.com/item/32883863...4c4dB8D0wO

Maybe yours has a real cut off or i have to look better into his program, i set the cut off at 3v.
But it only gives a warning signal.
Still learning English. Learning Li ion and solar technology.

4200 cells in packs Exclamation above 2500mah and 90%soh.
1500 waiting for testing.

Saving for 3 times phoenix inverter 48/3000 230v to gain also 380v
3 chargers?

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
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#7
(08-18-2019, 10:43 AM)100kwh-hunter Wrote: I bought a similar one.
With discharging stay with it.
I let that thing discharge overnight, to see what the total capacity of the pack was.
Next morning i found a pack discharged to 1.6v!

https://www.aliexpress.com/item/32883863...4c4dB8D0wO

Maybe yours has a real cut off or i have to look better into his program, i set the cut off at 3v.
But it only gives a warning signal.

Should be possible i guess
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#8
To be at the safe side.
I check it again and i put a timer on it and see what happens in 12 hours.
Still learning English. Learning Li ion and solar technology.

4200 cells in packs Exclamation above 2500mah and 90%soh.
1500 waiting for testing.

Saving for 3 times phoenix inverter 48/3000 230v to gain also 380v
3 chargers?

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply
#9
The original post was for a 2a discharger. It occurs to me to share that I sometimes use my OPUS BT-C3100(s) where I put in dummy (taped off) cells to hold in nickel strips joining all 4 connections out to +/- that I connect to a pack. This gives up to 4a charge/discharge - with the features of the OPUS - e.g. auto-stop at 2.8v etc.
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#10
Yes you are right, for two amp discharge you could use some zb2l3 with a resistor.

https://www.aliexpress.com/item/32952122...4c4dRrZ0qn
If you are going to buy some, give me a pm first, i dont use them anymore.

Still learning English. Learning Li ion and solar technology.

4200 cells in packs Exclamation above 2500mah and 90%soh.
1500 waiting for testing.

Saving for 3 times phoenix inverter 48/3000 230v to gain also 380v
3 chargers?

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply


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