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JRP3

JRP3
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  • Tesla - 20 Key Risks That Longs Are Ignoring [View article]
    Tom, Market, Port,

    Every one of my points is 100% correct and easily verifiable on your own by doing some research. Even chip's link supported the points I made. I realize the fact that Tesla is using a highly durable cell chemistry and managing it in a way that will increase it's longevity is troubling to all of you, but those are the simple facts, backed up by science. Ignore reality at your own risk if you wish, but pretending that chip's lack of basic understanding of cell chemistry, behavior, and battery life extension techniques is somehow "better" than actual knowledge is rather strange. You might want to ask yourselves why someone with "20 years experience" in the industry doesn't understand why laptop cells seem to die so quickly and why Tesla's cells will not. As I've said, this is basic stuff, which quite frankly all of you should know as well considering how much time and effort you seem to put into following Tesla. The entire business model for Tesla is based on the durability of the cell technology, which is why I spend so much time learning about it. Instead of posting nonsense in the SA comment section I recommend doing some actual research into the cell chemistry that Tesla is using. Unless of course you'd rather not find out information that might cause you to question your constant trashing of Tesla as a company. Your choice.
    Apr 17 09:31 AM | Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    18650 is a format, not a chemistry, and a format has no relation to energy density.
    As for fast charging ruining batteries, it depends on the chemistry. There are lithium battery chemistries that can already recharge in 10 minutes without damage, so it's not an impossibility.
    Apr 17 09:12 AM | Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    duc,

    "The TSLA boys will overlook many things.
    They will attempt to discredit just about any truth. "

    How is correcting an error discrediting "truth"? He even admitted his mistake. You, on the other hand, obviously only care about discrediting Tesla, even if you need to use mistakes to do so.
    Apr 17 08:53 AM | 3 Likes Like |Link to Comment
  • New Mercedes electric minivan has a Tesla touch [View news story]
    The RAV4 pack is 40kWh and has a 100 mile range.
    http://bit.ly/1hPbQbt
    Apr 17 08:49 AM | Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    That report is nonsense. Only bears use it as a reference since it doesn't reflect reality.
    Apr 16 12:13 PM | 5 Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    What sort of "battery specialist" doesn't know that LiFePO4 also forms an SEI layer? It's a crucial part of the cell. Also, LiFePO4 has a very long life.
    You didn't say anything to help a little, since you're wrong.
    Apr 16 12:09 PM | 3 Likes Like |Link to Comment
  • Tesla - 20 Key Risks That Longs Are Ignoring [View article]
    Pssst, Whitestar was the Model S. They just wisely decided not to bother with the hybrid version. They also wisely decided to take the NUMMI deal for pennies on the dollar instead of building a new factory. Two smart decisions from Tesla, and you try to spin them as a negative.
    Apr 16 12:03 PM | 2 Likes Like |Link to Comment
  • Tesla - 20 Key Risks That Longs Are Ignoring [View article]
    Chip,
    My link is to a blogspot blog from Lithium battery researcher Venkat Srinivasan, I doubt it is connected to a virus.
    In any case I must say I'm completely shocked that you actually work with lithium cells considering your complete lack of basic knowledge about their behavior, though I've encountered a similar lack of knowledge from others in the lithium battery industry, Don Harmon being one of them, and had to spend some time educating him as well. Everything I've posted above is easily verifiable by your own independent research. I guess it just proves that working on the battery management side doesn't give you any particular knowledge of the chemistry side. I'm really puzzled though that you seemed to have no idea how Tesla manages the pack SOC to avoid fully charging and discharging it if you've worked on battery management systems:

    "So I should not expect a full range (limited charge range) out of a Tesla then?"

    I'll assume you know much more than I do about circuit design but you clearly do not know more about the behavior of various lithium ion chemistries, or as Ford suggests, your knowledge may be stuck in the past. Battery University is somewhat useful as a basic primer but they don't get everything right. However even that link you provided backs up my point that NCA chemistry has much better life cycle than LiCo, as well as much better energy density. There was no decrease in safety, and though that chart doesn't show it NCA is actually safer than LiCo.

    I must say that it's rather troubling when I have to educate people working in the lithium ion battery field, but it's happened often enough I guess I should not be surprised.
    Apr 16 09:40 AM | 1 Like Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    Tesla supercharger with solar panel canopy:
    http://bit.ly/1hUMyTn

    For now they are just installing most of them without the solar canopy, to get as many installed as quickly as possible. The solar panels can be added later. Smart business move of course.
    Apr 16 09:15 AM | 4 Likes Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    "And Tesla has turned night into day."

    That's essentially what the supercharger battery banks do. Oh, you forgot that part?
    Apr 16 09:12 AM | 1 Like Like |Link to Comment
  • Tesla In China: Cleaning Up The Smoggy Skies [View article]
    "BYD's battery is way superior to Tesla's "

    False. The LiFePO4 chemistry that BYD uses has less than half the energy density compared to the NCA chemistry that Tesla uses, which means BYD could only get less than half the range. That might be fine for city cars and plug in hybrids, not so much for EV's. Plus the NCA chemistry cycles well beyond 2000 cycles, which means for the Tesla 200+ mile packs provides more than 400,000 miles of driving. For EV's Tesla's battery is "way superior" to BYD's.
    Apr 16 09:00 AM | 5 Likes Like |Link to Comment
  • Tesla: Don't Say You Never Had A Dip To Buy On [View article]
    You don't need to look up the video, I remember Musk saying the same thing. However if you do have any evidence of Tesla badmouthing the 40 to potential customers I'd like to see it. In any case if Tesla managed to push people into the longer range versions I'd say that's good marketing, and if someone looking at the 40 could be so easily swayed to a 60 or 85 then it's quite obvious the demand for the 40 was weak, as I said, and Tesla was wise to kill it. It would have been killed when the Gen3 came out anyway.
    Apr 15 09:01 AM | 2 Likes Like |Link to Comment
  • Tesla - 20 Key Risks That Longs Are Ignoring [View article]
    Market,
    Did you read my reply to Chip? I broke it all down to a basic level, and if you can understand what I wrote then the answer to his last question becomes obvious.

    Port,
    Panasonic builds cells to Tesla's design using NCA chemistry. What specific changes Tesla makes is likely only known to Tesla and Panasonic. There are many different proprietary additives that can dramatically change cell behavior. My point is that the NCA chemistry that Tesla is using has completely different characteristics in energy density, cycle life, and safety, compared with the LiCo chemistry used in laptops. It's worth noting that the original Tesla Roadster did use the older LiCo chemistry, and quite successfully. The much improved NCA chemistry will do even better, and the battery longevity issues that so many seem to be hoping for simply do not exist.
    Apr 15 08:55 AM | 1 Like Like |Link to Comment
  • Tesla Kicks China Plans Into High Gear [View article]
    A good engineer, which Porritt seems to be, can engineer for different parameters.
    Apr 15 08:41 AM | 1 Like Like |Link to Comment
  • Tesla Kicks China Plans Into High Gear [View article]
    I never said anything about flipping Tesla's, I merely responded to your claim of "plenty like new Tesla's on Ebay", which was false. I guess you were too lazy to actually look ;-)
    Apr 15 08:36 AM | 2 Likes Like |Link to Comment
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