Battery discharge capacity analyzer

[Monstarr]

Hello,

Now I am using a electronic load with a 20 euro wattmeter for my discharge tests of batterypacks. I give the pack a full charge and discharge (max 5 A unfortunately) till LVC and write down the amount of mAh.
But I am searching for a decent (pref. automated) analyzer (coulomb count & Ri measure) device with USB interface which can generate nice discharge information plots at various current levels for battery packs.
I cant find anything about this subject through search unfortunately.

I am aware of the more expensive RC type chargers like the ichargers/hyperion etc. that have this function for 6+ series connections. But the discharge wattage is highly limited most of the time or they cost a limb.

What do you guys use for this?
What is a nice affordable option?

 

[Hillhater]

What size /voltage packs are you testing ?
What Max Amps do you want to load on to them ?
The HK Reaktor 300 ($65) can handle 20 amp /300W discharges and log the data on up to 6S packs
Or you can assemble a suitable discharge load and simply collect log data on a Celllog .

 

[Monstarr]

What size /voltage packs are you testing ?
What Max Amps do you want to load on to them ?
The HK Reaktor 300 ($65) can handle 20 amp /300W discharges and log the data on up to 6S packs
Or you can assemble a suitable discharge load and simply collect log data on a Celllog .

Desired max amp around 10-20 A.
Voltage: Normally within the 50 Volt area for scooter packs. So 6S wont cut it.
I see that the Reaktor has a regen function so it can drop current into a leadpack or a similar but larger than the discharge battery. But the manual says it can have a 20% difference between measured/actual current flow. That is too much for testing.

 

[DVDRW]

Why anyone not using arduino+PC as 1 cell cycle tester?
Cost is nothing and its fairly simple to program.
Planning to cycle test ~10 different cells at same time.
So i have to buy 10 Reactor chargers or what

Im first who thinks to build Arduino cycle tester?

 

[Hillhater]

So, 50 v, 20 amps ? ...not individual cell testing ?
Automated, data logging,
Not expensive ?

That's not easy...
if you can forget the cost,..a CA with the logging accessories.
All this assumes you have a variable load that can handle 1kW ?
Something of interest ..https://endless-sphere.com/forums/viewtopic.php?f=14&t=56747&p=846172&hilit=Hair+dryers#p846172

DVDRW.. A multi channel , single cell , tester/logger , is a completely different set of requirements.

 

[Monstarr]

So, 50 v, 20 amps ? ...not individual cell testing ?
Automated, data logging,
Not expensive ?

That's not easy...
if you can forget the cost,..a CA with the logging accessories.
All this assumes you have a variable load that can handle 1kW ?
Something of interest ..https://endless-sphere.com/forums/viewtopic.php?f=14&t=56747&p=846172&hilit=Hair+dryers#p846172

DVDRW.. A multi channel , single cell , tester/logger , is a completely different set of requirements.

You do have these devices which do a full discharge run and print or export the data by usb.
The datalogger for the cycle analyst is something i havent seen before. Perhaps I will go that route instead of a simple and i think less accurate RC wattmeter. But the CA with analogger will put me down around 350 euro. That makes it expensive again to just use it as logger.

Better stick with the 5A max load and wattmeter for now :lol:

 

[Hillhater]

You could build a load bank for increasing the load..
https://endless-sphere.com/forums/viewtopic.php?f=14&t=74567&p=1125266&hilit=Hair+dryer#p1125266
Data logging is not a cheap game once you go beyond the RC voltage level.
I have never tried these, but they look like a possibility...approx $150 on EBay .
http://www.hantek.com/en/ProductList_1_9.html