Yea i’ve been looking at the sanyo 20700 but they are only 15A, 4ah. it is literally off the charts but
not sure the extra capacity is worth it since the voltage is so low(slow) at that point…
but at 5ah it would be worth it.
Looks similar to sanyo 20700a. The problem is the weight. A 12s4p with 18650 (~45 grams) cells will be lighter than a 12s3p with 20700 (~63 grams) cells
A 2p 20700 battery would be similar in weight to a 3p 18650 battery. I’m still considering 20700 for my next battery though because it should be a smaller form factor which I think is the goal of this battery type
That’s what i’m seeing on the scale too. 12S4P is 48 cells at 45 grams per cell making 2160 grams which is 4.7 pounds. Add nickel and heat shrink, an eswitch, a BMS and some wire and you’re just at about 5 pounds which is what i was seeing on the postage scale for my packs.
Yep but it is still relevant, depends on what you do with it.
Look my current battery pack is made of 2x 8S2P of LG HB2. 33v 6Ah. 688 gr of raw cells. Each 2P pack can discharge +60A all day and cells won’t hit 80 degrees celsius.
That’s ±1600W continuous power source in a tiny pack. Space constraint can’t allow another P pack, only few more series.
What if I make 2x 8S1P of Samsung 30T? 33v 6Ah. 504gr of raw cells. +40A continuous around 72 degrees end of discharge, 60A continuous is 90 degrees end of discharge.
So for a street setup I can simply drop 1P to gain weight (that’s +180gr less), I will be lighter, keep same range (probably even better with 30T in 1P) and pack same usable power.
What’s nice is that I also can choose to keep it same setup than my HB2 packs (space allows 2x 2P after all) so numbers go rocket : 33v 12Ah, +80A continuous around 72 degrees, 120A if stressed.
Yea that’s 1kg pack instead of 688gr but that’s also only 310gr more for double everything.