CrimsonEclipse
Elio Addict
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- May 24, 2014
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One consideration is: How long does it take to charge the various batteries at provided voltage and current? And does not the more rapid a charge often degrade the long term performance of most all batteries? One concern I have is with all batteries, they first get out on the market as being the new big solution but over the years the problems start. Li ion, for instance: now they often just last sbout two to three years no matter what charging and discharging methods. They apparently grow internal dendrites, or whatever, effectively shorting themselves out. Non of my Bluetooth speakers, for instance, work after about three years. If you are able to replace these batteries, there is no guarantee of how long they’ve been on the shelf and then you get bad ones, NIB.
I’m sticking with gasoline, heck I still have a black and white TV! Just waiting till they work all the bugs out with them color sets.![]()
Charge time. Already discussed at length.
Your opinions of Li-ion batteries are a bit confused. The speed you charge is not the problem. HEAT is the problem.
Control the heat and keep the capacity at 20-80% and they will last you the life of the car and certainly longer than a typical ICE drive train.
Dendrites, or as we call them in the industry: "whiskers" occur with certain impurities in very specific situations, manufacturing techniques and quality control philosophies.
(looking at you Samsung)
They are an easily solved, low level problem.
Returning to the heat problem.
Comparing cell phone batteries to BEV batteries WAS an apples to apples comparison, specifically, since the original Tesla Roadster actually utilized cell phone batteries. But today, the batteries are purpose built for charging times and specific outputs.
Remember, that on a cell phone, the CPU and GPU are night next to the battery. High CPU/GPU utilization create a LOT of heat, as does the fast discharge of the battery and HD screen on full bright AND WiFi and Cell antenna. All combined in a small package with little surface area to dissipate heat.
Then, users would discharge the battery below 20%, then immediately charge the phone while in use creating EVEN MORE HEAT.
It gets worse!
Compounding the situation, the cell phone manufacturers have NO INCENTIVE to make the battery easily replaceable or last more than 18-24 months! They need you to buy another phone. (looking at YOU, Apple! <and your processor slowing shenanigans>)
Tesla NEEDS their batteries to last as long as possible, so they control the temperature, control the maximum and minimum discharge to optimize cycle life of the batter pack. In addition, the battery is not co located with a heat producing display and CPU/GPU and has an integrated cooling system.
So the basic understanding of the basic component (the battery) is insufficient.
For a proper analysis, you need an understanding of the complete system.
You're absolutely allowed to fear new technology. There are still black smiths and folks that make buggy whips.
You're not going to make much money buying buggy whip stock though.