I am of the opinion that the EV market is going to be held back until we have standard battery packs of known price, quality, and warranty. There's no good reason that this can't be taken on by some standards body. ANSI? Milspec? Please, somebody!
standard battery packs of known price, quality, and warranty Here in China this is essentially the situation for the huge fleet of e-bikes from various manufacturers.
There you go. And the Chinese manufactures will likely create the standards for the larger batter packs. Customers will vote with their dollars. I assume that my first electric car will be Chinese. Might even have the name Tesla on it ;)
I re-read the article to be sure and here is that answer. $15000 per 10 year old Tesla battery is the answer to the question, 'how much would a 10 year old Tesla battery be worth to a utility if used to supply peeking power?' Ans: $15k They get that number multiplying the going rate for peek power by the remaining battery capacity over 16 years. Year 1: 0.0385 MW/days X $100 X 365 days = $1405 Over a 16 year investme…
But the batteries don't have a capacity of 0.0385 MW-days. They have a capacity of 0.0035 MW-days when brand new, or 0.0032 MW-days if degraded to 90% capacity. (It looks like they divided kilowatt-hours by 2 instead of 24 to get kilowatt-days.) Not only that, but it looks like off-peak power is about 70% as expensive as peak power, so it'll cost $70 per MW-day to charge the battery. Year 1 (corrected): 0.0032 MW-day…
You're making a wrong assumption about what is being bought. (you aren't alone, everyone else in the thread is as well)
What's being purchased is 'standby reserve power per day 'not 'energy per day'
Digging it appears the promise being sold is. Will reserve of 2 hours of peeking power for $100 per megawatt _per day_.
That's where the divide by 2 comes from. because what you are selling is the ability to provide 2 hours of peeking power _if needed_. Not 24 hours worth.
Apparently, recovery of lithium from batteries during recycling is not economical, either in terms of money or energy efficiency. Additionally, lithium batteries are more difficult to recycle due to their complexity and the amount of variation between battery types. Compare this with lead acid batteries. About 99% of lead acid batteries are recycled, and the recycling process itself is rather efficient. http://www.sc…
Too bad it just didn't happen to be easy. I would hold out some hope for recycling simply given that each Tesla model 3 size battery has 3,000$+ of raw materials, and there will be literally billions of cells with identical design to recycle. I would find it an interesting fact of the world that it's cheaper to go back into the Earth's crust to get more than to somehow separate it out from a pre-existing source that…
$3,000+ of raw materials is not the same thing as $3,000+ of lithium. The batteries are already recycled to recover the cobalt and manganese, which are valuable. The numbers I've heard suggest that less than 1% of the material cost is lithium, but that number sounds a bit low—maybe less than 1% of the total cost is the cost of lithium, perhaps. Battery grade lithium is around $5/kg.
What has the weight of the battery to do with degradation speed? It is the cycle count which determines battery aging, and for the same distance driven, a Tesla has far fewer battery cycles than a smaller vehicle. The energy consumption of a Tesla is higher than that of smaller vehicles, but by a surprisingly small amount, as kinetic energy can be (partially) recovered. At highway speeds, a Tesla even sometimes consu…
weight of vehicle.
battery degradation is proportional to energy x time. if you need 3x more to push all that weight, is it is dead 3x earlier.
it's just like how you waste breaks 3x faster breaking a cayenne instead of a sedan.