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In response to
"Dyson is getting into the electronic car business. £2 Billion investment. Will be manufactured in Singapore -- (link)"
by
decline
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The interesting thing with all the new EVs to market isn't really the car appearance, but the battery tech.
Posted by
TWuG
Oct 23 '18, 06:21
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Tesla uses 18650 cells in the S and X and 2170 cells in the 3. Thousands per car.
Chevy is using prismatic cells. Around 300 per car.
Some manufacturers are using pouch cells.
And it isn't just the type of cells, but the battery management system that balances charging and discharging and keeps the battery packs at a proper operating temp.
Tesla warranties there new 2170 cell for 8 years, 120,000 miles (in the long range pack) or 100,000 miles for the standard range pack. If the pack drops below 70% initial capacity (310 miles LR, 220 miles SR), then it would be covered by warranty. 70% is considered the end of useful life, though obviously the battery can still be charged/discharged, but range will be lower than the car's rated range. The S & X packs have an 8 year, unlimited miles warranty and useful life is considered to end at 80%.
The Chevy Bolt has an 8 year, 100,000 mile warranty on its battery, but I can't find the useful life percentage. Initial warnings from Chevy in 2016 said to expect up to 40% degradation over that warranty period, but it isn't clear if falling under 60% of initial capacity would trigger the warranty.
When you hear business people talk about moats, Tesla's partnership with Panasonic for their batteries is looking like a pretty substantial one. They have at least a 6 to 8 year head start against the competition when it comes to chemistry, life, and management of the systems. And they have millions of miles of real world feedback.
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