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fgrindle

fgrindle
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  • New Mercedes electric minivan has a Tesla touch [View news story]
    Musk hasn't found any partners for the Gigafactory and hasn't even been able to select a state to build it in. Now he's in China.
    Apr 18 02:38 PM | Likes Like |Link to Comment
  • New Mercedes electric minivan has a Tesla touch [View news story]
    I am not impressed because no one knows how long a new battery design will last. The Roadster batteries appeared to last for years. Sony had to recall thousands of laptops because the LI-ion batteries were burning up. Secondly can you show me a quote from Musk making that entirely clear. Your telling me he knows how to build 6 million batteries a week ? Please supply proof. You seem to have answers but no back up for them.
    Apr 18 02:36 PM | 1 Like Like |Link to Comment
  • New Mercedes electric minivan has a Tesla touch [View news story]
    The difference between using a battery that has proven reliability over one that has not had any life test. That would be a formula for disaster. Panasonic has patents and manufacturing knowledge that Tesla doesn't. In retrospect Musk thought Panasonic would give them the list of their suppliers and manufacturing techniques, not so. Would you build a Gigafactory to produce billons of batteries that had no life test or reliability tests. To ship 10,000 Gen III a week in 2020, they will require about 60 million batteries a week. I know the answer "Musk can do anything!" Here are some Quotes from 60 minutes. Musk sound more excited and challenged by space X. It really is more exciting to develop a reusable rocket than to have to bs with battery makers and Chinese salesmen. He might just say I thought it would fail. See quotes:
    Musk
    I didn't really think Tesla would be successful, I thought we would most likely fail.
    But I thought that we could change the false perception that people have that an electric car had to be ugly and slow like a golf cart.

    Musk's brother Kimbal
    "He's a guy with unlimited ambition, it's not a typical type of ambition, it's more like his mind needs to be constantly fulfilled. The problems he takes on have to become more and more complex at the time to keep him interested."

    After investing in Tesla problems with the Roadster caused Musk to lose all his money and actually go into debt trying to save Tesla.

    Musk
    "Space X was running on fumes they had no money." Fortunately the fourth attempt succeeded and NASA gave Space X a $1.6 billion dollar contract.

    Musk
    I would love to have Space X be the company that brings humanity to Mars. And I hope I see it
    While I am still alive.
    Musk works three days a week at Space X and two at Tesla. Weekends with the family.

    Announcer: Musk has just announced a $5 billion dollar factory
    What is it about you that seems to invite skepticism?
    Musk
    Well I think it because we are doing these things that seem unlikely to succeed and we've been fortunate and thus far they have succeeded.


    grindle
    http://www.fgrindle.com
    Apr 18 01:00 PM | Likes Like |Link to Comment
  • New Mercedes electric minivan has a Tesla touch [View news story]
    Tesla has never built one battery cell. Panasonic has built millions of cells and knows all the secrets of why they are so reliable. Tesla's contribution was assembling, cooling heating and charging batteries. Very necessary but I wouldn't want to gamble on Tesla building batteries without Panasonic's input.
    Apr 18 08:08 AM | Likes Like |Link to Comment
  • New Mercedes electric minivan has a Tesla touch [View news story]
    The Panasonic 18650 battery was not designed for cars but for hand tools and laptops. Martin Eberhard, one of the original founders of Tesla realized that these batteries had a large energy storage relative to size and weight. Rated at 3.7 volts and 2.25 Ampere hours, thus giving about 8.1 watt hours of storage. Eberhard designed a battery package of about 8000 batteries. Basically 80 sets of 100 cells in series giving an output of 370 volts capable of delivering 180 amperes to the motor. Because LI-ion batteries are known to short and burn if operating at too high a temperature. Each battery connects to the bus with a thin wire that acts as a fuse preventing fire from spreading if a battery fails. Batteries are temperature sensitive and must be cooled when supercharging or in hot weather, they must be kept warm in cold weather. Tesla pioneered the liquid cooled and heated battery pack. An air conditioner runs when it gets hot cooling the pack. In cold weather, motor heat warms the battery pack. The assembly, cooling system and reliability of this total package helps start up EV manufacturers. only have to worry about the motor and drive. They can worry about batteries on their next generation EV.
    Apr 17 09:32 PM | 2 Likes Like |Link to Comment
  • New Mercedes electric minivan has a Tesla touch [View news story]
    What do you do with them after they can't run home security? Bury them?
    Apr 17 02:35 PM | 1 Like Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    To charge a 60KWH battery fully in 10 minutes would require 6 x the power or 360 KWH!
    At 400 volts that would require 900 amperes. If we used a cable with 2-20 foot 000 wire (.6" dia.) to charge it's resistance of .0618 ohms per 1000 feet would cause a loss of
    I^2 R or 900 squared x .0618 ohms per 1000 ft./1000 x 40 feet = (810000 x (.0618/1000) x 40 = 2002 watts lost in the cable! For 900 amperes you would need four 000 cables per leg! Not possible.
    See:http://bit.ly/1hPCl08
    Apr 17 10:56 AM | 2 Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    To recharge a 60KWH battery pack in 10 minutes would require 900 amperes assuming no losses. At 900 amperes the charging cable would have to be huge.
    This is not possible.
    Apr 17 10:06 AM | 1 Like Like |Link to Comment
  • New Mercedes electric minivan has a Tesla touch [View news story]
    It seems that the EVs are not that pollution free, due to coal fired generators producing the electricity, Lithium batteries manufacture, and burial. A diesel ICE getting 45 mpg produces less pollution.
    Apr 17 09:53 AM | 1 Like Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    @ford: boy do you make assumptions. The Gigafactory is to be designed to make 18650 batteries not any others, because it has the most energy density. Regardless of battery type you still have to replace the power used and you will overheat and destroy the batteries if you charge with too high a current. Assuming 99% of all cars are fully charged is not assuming that they drive 200 miles and need a charge. The power needed to recharge which I assume would be 53 KWH is a real assumption and each pump would have to deliver that energy to its batteries. Its basic electricity 101. If you use 50kwh you have to replace it and it takes time or you will ruin your batteries.
    Apr 17 07:21 AM | 1 Like Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    @Ford The fact that it takes 40 minutes instead of five minutes to refuel, would mean that you would have to have eight times as many "pumps", each connection delivering 400 volts at about 200 amperes (80KW) for 40 minutes (53KWH). Eight times 80KWH equals 640 KWH. This would put a huge drain on the grid and really would only be needed on high traffic weekends.
    Apr 16 10:33 PM | Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    The reality is that Tesla owners always quote the same reasons the car is superior. It can go 0-60 in 4 seconds, it has a 265 mile range per charge, and the regeneration braking makes one foot driving a pleasure. The Tesla I drove in was not as silent as I thought it would be. Obvious wind noise is the same as in my ICE vehicle. Although considered a large sedan, the back seat headroom is low for people taller than 5' 10". I understand that there are now 79 Supercharging stations in the US. I don't think more than one or two have solar. Solar is not as easy as it sounds because you need a large area for the panels. You also have to either provide battery storage or a means to sell the energy back to the utility which requires negotiations differently by state and country. If there were 500,000 Gen III cars on the road on a Fourth of July weekend, I would imagine lines of cars waiting many hours for their turn to charge. This is an evolving technology and who knows how it will end.
    Apr 16 10:04 AM | 2 Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    How can you expect sales of 5,000 in 2014 and 30,000 in 2015. Tesla doesn't advertise. After 10 years Tesla hasn't sold that quantity in the US. Am I wrong to assume that Tesla is barely known in China. The Were there any stories in the papers when Tesla's China sales manager quit? Does anyone hear about the Gigafactory? I don't think so.
    Apr 15 06:42 PM | 1 Like Like |Link to Comment
  • Report: Tesla, Sinopec to hold talks about charging network in China [View news story]
    Tesla isn't building a supercharging network across China. They are only adding a few stations in Bejing and Shanghi. I really don't think that will encourage people with apartments to buy a Tesla.
    Apr 15 07:42 AM | 1 Like Like |Link to Comment
  • Tesla Kicks China Plans Into High Gear [View article]
    22,000 versus 100,000 might have helped the Prius.
    Apr 14 08:31 PM | 1 Like Like |Link to Comment
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