Not that they're powering submarines (yet

These are the same NMC cells you see being flogged on facebook. They come as 5p units which look like a prismatic cell. James needed 6p, so we came up with our own termination. I think they are a 5C continuous, 10C burst cell. 25 Ah pouches BTW.Hyena wrote:Nice work. Whats the capacity and C rate of those big pouches ?
Not that they're powering submarines (yet) but with the back of the 175A andersons and the edges of the perspex boxes filled with epoxy or silicon I imagine you can get them pretty well sealed for general purpose all weather use ?
Yeah, and the brass nuts are still a bit cheaper. I have devised a means of soldering the brass (or nickel plated steel) nuts to the boards quite quickly, but given the volume I'm working with I'm pretty content with the system for now.bobc wrote:Probably "granny sucking eggs" time, but did you check out "clinch nuts" alternative to soldering nuts on the back of the PCBs? Even if you decide you still want to solder these may still be handy because they would stay located while soldering. You can get PCB friendly ones, we've used 'em in decent volume mass production.
Yep, would be a terrible shame...Arlo1 wrote:Nice CRX you have there. It would be a shame if someone was to install a Leaf motor in it.
Any converted electric car, but one with a performance tilt. Most folks opt for LiFePO4 cause its cheaper but comes with limitations. These would be ideal for people willing to build Tesla beaters I'd think.Tomdb wrote:What kind of vehicle would you be trying to market these too?
Cost price is AUD $16 per cell, depending on the exchange rate. These packs would have 120 cells in them. The enclosures will add about another $100 or so I would hope. Whole package is 15 kg. The more energy dense cells will be a tiny bit heavier, and markedly more expensive. Probably about $26 per cell.Tomdb wrote: 50ah gives you roughly 20 kwh at 345V so quite low for a car conversion.
Would you mind sharing some sizes and rough weights?
Plus what kind of pricing would you be thinking about?
These cells do look promising in terms of a good balance between weight and discharge, 150 wh/kg and 20C is quite impressive. Did you measure temperature during the discharge?
Tomdb wrote: 50ah gives you roughly 20 kwh at 345V so quite low for a car conversion.
Couldn't agree more, what is the glue/ sealant used? Do you counter sink the bolts in the polypropylene or use a normal M10 or M8 bolt?litespeed wrote:That was a super cool build. Thanks for taking the time to make and post it. Excellent work.
Tom