Recent content by petemarconi

+1

yep, they are separators - I've assembled packs using these with a small dab of glue (silicone or similar) top and bottom of the cell to keep it in place until you weld or solder the connections. They make for a very dense pack, but you will lose any cooling effect that airflow with the other...

These cell holders might work for your build too, a bit more work to assemble, but give a nice compact pack. https://www.aliexpress.com/item/18650-battery-holder-Cylindrical-cell-2-10-plastic-holder-18650-lithium-ion-battery-bracket-plastic-case/32729220653.html?spm=2114.13010608.0.0.5jxYFJ

10.24wH per cell is roughly what the best of the latest 18650's are putting out (samsung 30Q etc) - so approx half the capacity weight for weight, price is similar too. Taking into account these are of unknown age I think you can do better for the price.

Also, 44.30v / 14 gives just over 3.16v/cell - so some discrepancy there. I would disconnect bms, set your lab power supply to, say 4 volts and 2 amps and go through the battery from -ve to +ve one pair at a time checking each pair takes the full 2 amps, only need to connect for a few...

I use a lab power supply because of the voltage flexibility it offers, it charges using cccv and will charge all the way down to cutoff at 0 amps. Cell manufactures recommend a varying charge cutoff usually around 50-100ma which a normal lithium charger will be set up to do, I've never had a...

Yep, agree 100% - I did mention that in my last post :-)

Can't help you with the bms I'm afraid, I've never used one. I prefer to rely on myself and a cell log, or to quote a few other people on here: I'm the bms :-) The bms 'to use or not to use' argument will go on for ever, I'm happy to charge my packs using a 0-60v 3a or 5a lab power...

unless you've soldered cells before I would get hold of a few scrap ones to practise on. The 'secret' to good soldering as you prob know is to have all the bits to be soldered clean and tinned, I tin both ends of the cell before before soldering up into packs. The main worry with soldering...

Well, I always solder all mine, made and used 15 packs of differing sizes (10s2p up to 10s9p) and never had a problem - all packs still working fine. However, someone will be along in a minute to tell you why you shouldn't do this, how dangerous it is and how you'll ruin your cells...

try: https://eu.nkon.nl/ They take an extra couple of days to weld the tabs on and charge €0.40 per cell. I've used them a few times and found them excellent, genuine cells and fast well packed delivery. Not sure if they will weld them up into blocks, you could ask though..

Hi, I've used one of these for a couple of years with no problems. No Fan, max 5 amp output, but can be paralleled if needed. Available on eBay and other sites. http://www.gophertc.com/en/cps-6005-0-60v-0-5a-switched-mode-dc-power-supply

No prices and no spec unfortunately, I presume the spec will be available with their arrival on the website. My presumption would be that they will all be fan cooled as with the cps-6011/17 etc. I would also think they will go a bit higher than 84v, the 60v models go up 63v, so maybe a...

I asked them about the auto range - and got this reply: Dear Sir, We suspended GAP series due to we are updating the LCD and the housing, the housing is same as the CPS series. if you no need computer control, please consider our CPS series,we are releasing CPS-8405(0-84V, 0-5A)...

As another owner of one of these power supplies I would just like to add my own observations. I have used the 60v 5amp version for six months charging a variety of lithium batteries from single cell up to 63volts (max voltage the power supply will provide). It has been 100% reliable so far...