I am starting to write a part list for my new build, so since a new trend are 21700 cells and the fact that I have spare Hummie deck laying around, I’ve decided to give them a go…
So, since I’ll go with 10s4p layout and considering that 40A continuously is more than enough for me, is there any rational reason not to go with 50E cells since those are roughly 1000mAh (more like 800mAh) bigger capacity. Majority of DIY builds uses 40T cells, I guess for their 35A current rating.
Yep. Also keep in mind that the closer you are to a cell’s max continuous discharge rating, the less capacity you get out of it and the more wear you put on the cells. The advertised capacity of a cell is often only achievable at less than 1A discharge.
If you are pushing the 50T’s hard, you might not get anywhere near the 800mAh additional over the 40T. You will, however, get a lot of sag. Whereas, if you use the 40T and are running them well under their rated current, then they are nice and cool and happy to give you most or all of the 4000mAh that they are rated for, with minimal voltage sag.
Just to reiterate. Way more sag. unless you’re going to be doing a single motor. I would heavily lean towards the 40T. Here are the Mooch discharge graphs to further the point. You can see an immediate drop of .1V more (at 10A drain) from the 50E’s vs the 40T’s, that difference is the sag which will be amplified further along as voltage drops. Also you can see the 1000mAh difference in the X intercepts as well.
hey @EreTroN , you are from Serbia, right? from where will you get your cells? as I hear, prices of li ion cells in Serbia are something like 18650 cell = 1 gram of pure gold
if you want to do some shaddy smuggling of cells with your neighbor country, I am here to help
