Cell Internal Resistance Meter

[SilverFox]

Hello Paul,

I ran some additional tests on the Eneloop cells.

Testing at 1000 Hz AC, I get 0.025 ohms.
Under a 1 amp DC load, I get 0.050 ohms.
Under a 2 amp DC load, I get 0.050 ohms.
Under a 4 amp DC load, I get 0.048 ohms.

This was averaged over 4 cells, but the only deviation occurred at the 4 amp test where I had a couple of the cells come in at 0.0475 ohms. The testing was done in sequence. I ran the 1 amp test first, followed by the 2 amp test, and finally the 4 amp test. I ran a duty cycle of 30 seconds on followed by 30 seconds off and checked over several cycles at each load.

I hope you find this information useful.

Tom

 

[pldaniels]

Received samples today of some really nice AA cell holders, these things are top-notch!

I'll certainly be putting them into the PIRCAT system.

For the best consistency, I'll probably solder the voltage-sense pair onto the ring closest to the contacts and put the current-carrying pair onto the PCB that these will mount on.

 

[Bullzeyebill]

Tom, where did you get your Kilter KT-97? Price range?

Bill

 

[SilverFox]

Hello Bill,

I got it from Kilter. I believe it was around $100, after some careful negotiation... They would have liked to have sold me several hundred units.

Tom

 

[clintb]

Yeah, I have the LiPo updated model, and a sweet PC graphing program (via serial port cable) that works almost as well as the CBA-II.

Whoa now. PC graphing program for the T35 GFX, through the serial port? Where?!

 

[LuxLuthor]

Whoa now. PC graphing program for the T35 GFX, through the serial port? Where?!

Where what?

 

[clintb]

Where what?

The software. I have a T35 GFX and would love to get that bad boy talkin' with the computer.

 

[LuxLuthor]

It was a gift from Mike at cheapbatterypacks.com

I promised him I would not distribute it, but man is it sweet. Wouldn't hurt to ask him.

​

 

[InHisName]

I received my IRM-004 device in the mail about a month ago.

I have collected data on my NexCell EngergyON NiMH cells. All the data is under NexCell EnergyON posting.

Has anyone else received theirs yet ?