3 ms·
the difference between 600 cycles (best 18650) and 4000 cycles is night and day. There's already Lithium Phosphate that is warranted for 6000-8000 cycles. That'
by fswd 4y ago
the difference between 600 cycles (best 18650) and 4000 cycles is night and day. There's already Lithium Phosphate that is warranted for 6000-8000 cycles. That's 19 years. With 600 cycles your battery will hit the landfield in 2 years. A Lithium Phosphate battery will last 19 years before it has to go to the landfield.
Nobody takes the environmental cost in consideration until you take away the subsidies and look at the real numbers.
- eternityforest 4y agoI don't think any batteries marketed as phosphate last that long, although they may contain lithium phosphate. The only commercial batteries I know of that can do that are Lithium Titanate/LTO, that you can mostly only buy on AliExpress and a few specialty places, and are almost unheard of in commercial products(Except maybe some wireless earbuds and capacitor-like applications). They have like 1/4 the energy density or something, but they are still really amazing. I'd love to see power tools use them, we could run tethered on a USB-PD, charging during idle periods, and not wear out from cycling.
- fswd 4y agoYou might be surprised researching the current product offerings. Google "server rack battery". I am off grid with a 5.1kwh server rack lithium phosphate battery. Basically it's all I need. $2200 shipped with accessories, built in BMS with temp sensor and high grade terminals, bluetooth plus RS-485/CANBUS.
- eternityforest 4y agoThose are pretty impressive! I wonder if they have some special software control to only charge up to 90% or something? I've never seem standalone batteries without smart controls go more than 3k for LFP.