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Tuesday, December 1, 2020

Tesla Third Generation Superchargers versus battery life

 Tesla will soon be producing its third generation electric Superchargers in China, in addition to cars it already manufactures there. Tesla plans on investing $6.4 million in a new factory to make its third generation of chargers -- the Supercharger V3. 



Elon Musk said: “China rocks in my opinion. The energy in China is great. People there – there’s like a lot of smart, hard working people. And they’re really -- they’re not entitled, they’re not complacent, whereas I see in the United States increasingly much more complacency and entitlement especially in places like the Bay Area, and L.A. and New York.”

Tesla secured $1.6 billion in loans from the Chinese government to help build its Shanghai factory. ... Meanwhile Tesla's total government assistance from U.S. governments, so far, is at least $5 billion.

Tesla's Supercharger network in Australia now officially costed more than gas. The news came as a result of a "recent price increase" to use the Superchargers and  "incorrect fuel figures on the Tesla website". http://elonionbloggle.blogspot.com/2020/11/teslas-australian-supercharger-network.html

Fast-charging of electric batteries can ruin their capacity after just 25 charges, researchers have said, after  experiments on batteries used in some popular electric cars.

High temperatures and resistance from fast charging at commercial stations can cause cracks and leaks, said the engineers from the University of California, Riverside.

The internal resistance of a battery fluctuates according to temperature, charge state, battery age and other factors. High internal resistance can cause problems during charging.

The algorithmic charging method – known as internal resistance charging –  learns from the battery by checking its internal resistance during charging.

For the first 13 charging cycles, the battery storage capacities for both charging techniques remained similar. After that the industry fast-charging technique caused capacity to fade much faster – after 40 charges the batteries only had 60% of their storage capacity.

At 80% capacity, rechargeable lithium-ion batteries have reached the end of ‘use life’ for most purposes. Batteries charged using the industry method reached this point after 25 charging cycles, while batteries charged with internal resistance charging were good for 36 cycles.

“Industrial fast-charging affects the lifespan of lithium-ion batteries adversely because of the increase in the internal resistance of the batteries, which in turn results in heat generation,”
said doctoral student Tanner Zerrin.

Even worse effects came after 60 charging cycles using fast industry charging. Electrodes and electrolytes were exposed to the air, increasing the risk of fire or explosion. High temperatures of 60ÂșC accelerated the damage and the risk.
https://www.imeche.org/news/news-article/fast-charging-can-damage-electric-car-batteries-in-just-25-cycles

You may be able to get away with the occasional rapid charge when you go on a long trip.

Tesla super chargers are used all over California. There must be some real world, actual facts and figures on battery performance, analysis here would confirm or refute the reports findings.

The International Energy Agency estimates that by 2030, if all countries live up to their promises, the world will have 140 million electric cars on the road.

But electric cars require large batteries, often produced in China using coal power. Just producing the battery for an electric car can emit almost as much as a quarter of the greenhouse gasses emitted from a gasoline-powered car across its entire lifetime.

And electric cars are recharged on electricity that almost everywhere is significantly fossil-fuel based.

Together, this means that a long-range electric car will emit more CO2 for its first 60,000km than a gasoline-powered car.

if the world gets to 140 million electric cars by 2030, the IEA estimates it will reduce emissions by just 190 million tonnes of CO2 – a mere 0.4 per cent of global emissions.

A hybrid car saves about the same amount of CO2 as an electric car over its lifetime.

 Personal gasoline-powered cars are only about seven percent of global emissions, so electric cars will only help a little.

Battery electric vehicles have not been through a full product lifecycle, nobody fully understands the real costs of maintenance and depreciation.
 

Why would anyone buy a 10 year old electric vehicle (EV) with the battery replacement bill looming, and a considerable reduction in charge-holding capacity after all the recharges ?



So an EV is likely to be scrapped at a younger age than an internal combustion engine vehicle.