4 ms·
LFP Also has much more cycle life and can be cycled 0-100% with much less degradation than NMC meaning a much longer lasting battery. The LFP Tesla it is recomm
by SigmundA 4y ago
LFP Also has much more cycle life and can be cycled 0-100% with much less degradation than NMC meaning a much longer lasting battery. The LFP Tesla it is recommended to charge to 100% always rather than only doing 80% except on long trips on the NMC Teslas.
LFP is also safer with much less chance for thermal runaway. So safer, cheaper, longer lasting, easier material sourcing, only downside is lower energy density (about 20% hit for same weight) but there is a huge effort to improve that.
You can LFP's pretty cheap now for home backup or RV use. I replaced my RV house batteries with LFP for 4 times the usable capacity in half the weight of my old lead acid for about 3 times the cost. You can get 48v 19" rack batteries very cheap for power backup uses. I think LFP's are going to take over most uses in including cheap commuter automobiles.
- rblatz 4y agoTesla recommends charging to 100% because otherwise it has trouble accurately estimating the vehicle range and battery state of charge.
- cogman10 4y agoTrue. Though the damage is low from hitting 100% which is part of the reason why this is a "just leave it at 100%" rather than a "hit 100% once a week". That said, I'd probably do 90% as the max and 100% on the weekend if I owned an LFP vehicle.
- dangrossman 4y agoThe average American, buying a ~250 mile range EV, would only need to plug it in to charge once a week. Maybe twice. So, just charge it to 100% every time you charge it.
- SigmundA 4y agoNot like they are just using battery voltage for SOC, they are coulomb counting with a shunt, so you only need to charge to 100% once in a while to account for drift. LFP gets 2x the cycle count at 100%-0% as a NMC does at 80%-20%. Due to its lower cell voltage it has less voltage driven aging than NMC. Elon: "I’d personally slightly opt for iron pack, as it wants to be charged to 100%, whereas nickel prefers ~90%." https://twitter.com/elonmusk/status/1431040308943364097?lang=en https://twitter.com/elonmusk/status/1431040308943364097?lang...
- manmal 4y agoThere’s also a downside to LFP batteries: They charge significantly slower. There was a report in Germany about Teslas with LFP packs only achieving 73kW on average. For some trips this means 50% longer charging times.
- SigmundA 4y agoI believe there was an issue with earlier software but current models meet or exceed the NCA batteries in charge rate with a 80kw average. Also 73kw is not 50% slower. https://insideevs.com/news/514857/mic-tesla-model3-srp-charging/ https://insideevs.com/news/514857/mic-tesla-model3-srp-charg...