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Panasonic Completing 3 New Cell Production Lines At Tesla's Gigafactory (arstechnica.com)

An anonymous reader quotes a report from Ars Technica: In a Tuesday interview with Bloomberg, the head of Panasonic's Automotive Division said that the company was on track to complete an additional three battery-cell production lines at Tesla's Nevada Gigafactory before the end of this year. That puts the expansion ahead of schedule for completion. Panasonic is a joint owner of the Gigafactory. The company provides the "2170" battery cells that go into a Model 3 battery pack. Tesla packages those cells to complete the pack. In the interview, Panasonic automotive executive Yoshio Ito told Bloomberg that "the bottleneck for Model 3 production has been our batteries." Ito added, "they just want us to make as many as possible."

In short, more battery cells rolling off more lines at the Gigafactory are good for Model 3 production only if the manufacturing process gets smoother. There's evidence that this is happening, as the company was able to sell more than 28,000 Model 3s in the second quarter of 2018, albeit at the slight expense of Model S and Model X production. The three new Panasonic lines will bring the number of cell-producing lines up to 13, Bloomberg wrote. Ito told the news service that Tesla is currently using all of its Gigafactory capacity to produce vehicle batteries, despite initially planning to reserve 30 percent of its capacity to build stationary storage batteries like Powerwalls and Powerpacks. That has played out in long-delayed Powerwall installations.

68 comments

  1. Is funding secured? by Anonymous Coward · · Score: 0

    better check

  2. Panasonic wins in the end... by Anonymous Coward · · Score: 1

    It looks like they'll supply every EV with batteries from the Panasonic Gigafactory.

    EV future secured.

  3. Doom and gloom. by Rei · · Score: 1, Funny

    Short short short! Tesla's going down, right? Musk is a crazy fraud, right? This could be your last chance!

    --
    "Who the hell is Nietzche? It's a question stupid people are asking." -- Newscaster, "Jesus Christ Supercop"
    1. Re:Doom and gloom. by Rei · · Score: 1

      My last stock purchase was in the 250s, when people were freaking out about the Joe Rogan podcast, which actually got him a huge number of views and positive comments.

      Haven't checked my average buy price in a while... probably somewhere around $275, $280 or so. Looking forward to really lowering that tomorrow :) This is a serious godsend, right before Q3 deliveries, but more importantly a month before the Q3 report. Didn't think I'd get such a good opportunity. Bought a little bit on the "SEC is investigating" dip a week ago, but I'm glad I didn't buy much then.

      I will need to lower my sell points for after the deliveries report, mind you. Was planning to start my sell points at ~$335, but I'll need to drop that to maybe ~$310 or so. Hard to say, I need some time to think about it. Stock sales after deliveries need to be designed to be bought back before the Q3 report. As I've mentioned before, my investment timeframe is for significant sales to be after the Q4 report at the earliest. Highs and lows between now and then are just sale points / buy points.

      --
      "Who the hell is Nietzche? It's a question stupid people are asking." -- Newscaster, "Jesus Christ Supercop"
    2. Re:Doom and gloom. by Anonymous Coward · · Score: 0

      Don’t you mean $307

    3. Re:Doom and gloom. by mlyle · · Score: 1

      Dude... tryin' to time the market... not smart.

    4. Re:Doom and gloom. by 110010001000 · · Score: 1

      Rei isn't too bright. He is just a technocrat who thinks that he is smarter than everyone else. The amazing thing is he doesn't consider how much risk he is taking for limited upside. Even if he bought at $280 and sold at $310 it would be a small gain in exchange for taking a huge risk that the stock might fall below $280. If you are looking at making a gain like that you should just buy an index fund. Pretty dumb, but he is Enron like in his wanting to be the "smartest guy in the room".

    5. Re:Doom and gloom. by LynnwoodRooster · · Score: 1

      After hours (when the SEC announcement happened) it's dipped as low at $265.50.

      --
      Browsing at +1 - no ACs, I ignore their posts. So refreshing!
    6. Re:Doom and gloom. by Rei · · Score: 2

      Have no interest in buying at $280, so your premise is false. Even when it was in the $270s *without* this news I only made a small purchase. Why would I make a large purchase at a higher price after this news? My price points tomorrow will start somewhere around $265 and go down from there, growing in size the lower the price..

      I don't act on small movements. I'm not a day trader. I buy when the stock is conveniently low. I sell - occasionally - when it's high due to good news that I think that the shorts will do a good job at FUDding down over the next several days. But for the most part, I hold until at least after the Q4 report.

      --
      "Who the hell is Nietzche? It's a question stupid people are asking." -- Newscaster, "Jesus Christ Supercop"
    7. Re:Doom and gloom. by mlyle · · Score: 1

      I wish you luck-- because that's what I believe this is.

      I think it's possible to come up with a reasonably good guess as to the intrinsic value of a security based on cash flow analysis, etc. I do not think it is easy to guess market sentiment and what an equity will do in the short term well. It's all psychology, from a wide variety of participants with varying views, interests, and appetites for risk and ability to commit capital behind their views.

    8. Re:Doom and gloom. by cheesybagel · · Score: 2

      Back before Black Tuesday people even took loans to buy shares. Hopefully Rei isn't dumb like that.

    9. Re:Doom and gloom. by jeadly · · Score: 1

      Have you heard of short selling?

    10. Re:Doom and gloom. by cheesybagel · · Score: 1

      Short selling can be even worse than that yes.

  4. The difference. by Gravis+Zero · · Score: 4, Informative

    Most everything (for a long time) used/uses 18650 battery cells which are 18mm in diameter and 65mm in height. 21700 battery cells (AKA "2170") are 21mm in diameter, 70mm in height and only made specifically for electric vehicles.

    TL;DR: image comparison.

    --
    Anons need not reply. Questions end with a question mark.
    1. Re:The difference. by AmiMoJo · · Score: 2

      LG and SK Innovation have gone a different route, with pouch cells of the type found in phones for automotive use. They are cheaper and higher energy density and it shows with significantly lower costs then Panasonic right now.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    2. Re:The difference. by Anonymous Coward · · Score: 0

      Most everything (for a long time) used/uses 18650 battery cells which are 18mm in diameter and 65mm in height.

      Remind me where those go in the 1+ billion iPhones and 2+ billion Android phones that have been produced.

    3. Re:The difference. by Anonymous Coward · · Score: 0

      Have fun with the heat and containment issues and the fire.

    4. Re:The difference. by Luckyo · · Score: 1

      None, but those go into essentially every battery powered power tool, clock, and pretty much any other appliance that has rechargeable battery functionality.

      And you don't get just one cell. Power tools often pack half a dosen to a dosen of those in each battery pack for example.

    5. Re:The difference. by mea_culpa · · Score: 4, Informative

      If you haven't seen it PBS NOVA made a great documentary about these batteries:

      https://www.youtube.com/watch?v=a4McN9OYDwg

    6. Re:The difference. by K.+S.+Kyosuke · · Score: 2

      It would be entirely reasonable for any application with 18mm cells to switch to 21mm cells, barring those cases where it's geometrically impossible, if there's benefits to cost and performance. I won't be surprised if you start seeing 21mm cells in other devices.

      --
      Ezekiel 23:20
    7. Re: The difference. by Anonymous Coward · · Score: 0

      Their long term reliability is questionable. Tesla's are best hands down due to the advanced cooling system and ability to isolate individual defective cells with no performance decrease

    8. Re:The difference. by WindBourne · · Score: 2

      who said that LG/SK cells are cheaper? They make heavy use of things like Cobalt, while Tesla 2170 does not.
      And where are you seeing LG/SK with higher energy density over the 2170?

      --
      I prefer the "u" in honour as it seems to be missing these days.
    9. Re:The difference. by rtb61 · · Score: 4, Interesting

      Used to be mainly for electric vehicles. Battery packs for solar powered homes and battery packs for vehicle are very similar. Panasonic pumping up the number of production lines, well Tesla also sells complete solar systems and they will likely sell far more of them them they do cars. Cars for Tesla are upmarket, the solar powered home system with battery pack are mass market and that's where the big dollars are and where probably over the mid term, where the bulk of Tesla profits will come.

      Pretty soon, people will not be going solar without also doing batteries and a complete system with a reliable installer is where the market is headed. You can expect Tesla to figure highly in this market, whether they choose to have installers on wages or franchises or a mix, is yet to become apparent.

      There is more money for Tesla in solar home power system with battery packs, then there is in just the segment of high end vehicles, cheaper to produce, much larger market, far simpler production. Good thing he picked up the solar panel manufacturer to go with Panasonic batteries and whom ever provides the control systems. Expect revenue from this to overtake cars within the decade. Panasonic expanding production is more to do with the home market than the vehicle market.

      --
      Chaos - everything, everywhere, everywhen
    10. Re:The difference. by Anonymous Coward · · Score: 0

      Why didn't you just check yourself? And give us the link? Does someone always need to do your thinking for you?

    11. Re:The difference. by AmiMoJo · · Score: 5, Insightful

      We can only infer from the price of cars using their packs, but consider this. Hyundai/Kia will give you a top spec car with 70kWh battery for a lot less money than a stripped down base Model 3 with 50kWh battery. Additionally we can see the price difference between the PHEV versions and EV versions of the Hyundai/Kia cars, which gives us a pretty good indication of the battery cost.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    12. Re:The difference. by torkus · · Score: 2

      Funny, people keep pointing out how ALL THESE EVs are SO MUCH better than the Tesla Model....anything.

      Yet they either don't exist, don't compare, or fall far short in several ways. For example, the Kona EV which I assume you're referring to is targeting to have 2,500 delivered this year. Total, not per month or per week.

      You also assume that other car manufacturers are pricing these vehicles with the same markup as anything else. Hint: they aren't. They're loss-leaders to drive sales in general and get good PR. Maybe keep up a bit on the EV bandwagon so they aren't completely left behind. No one is approaching EVs from a mass production perspective like Tesla.

      --
      You can get rich if you own a politician, but you have to be rich to buy one in the first place.
    13. Re:The difference. by torkus · · Score: 1

      You sound like a few project managers I know. Providing seemingly useful information which instead is both completely obvious and entirely useless.

      It would be entirely reasonable for any kitchen serving apples to switch to bananas, barring those cases where it's nutritionally impossible, if there's benefits to cost and taste. I wouldn't be surprised if you started seeing bananas in other kitchens.

      --
      You can get rich if you own a politician, but you have to be rich to buy one in the first place.
    14. Re: The difference. by WindBourne · · Score: 1

      the original cell was one the cheapest and highest density. Now the 2170 has 50% increase in volume for 200% energy. as to pricing, Hyundai/Kia pay cost or less from LG. LG continues to sell at decent prices to GM and non s. Korean firms. In addition add in the fact that Tesla has a fraction of Cobalt that others use. Then add in S. Korean one of a number of nations that are manipulating their won vs. the dollar. Sorry, but I seriously doubt that the others come close.

      --
      I prefer the "u" in honour as it seems to be missing these days.
    15. Re: The difference. by AmiMoJo · · Score: 1

      Where did you hear that Kia are paying less than cost price?

      In any case, one of the major innovations from LG has been to reduce the amount of cobalt used in the cells. Combined with the more efficient form factor they managed to get the price right down.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    16. Re: The difference. by Anonymous Coward · · Score: 0

      the original cell was one the cheapest and highest density. Now the 2170 has 50% increase in volume for 200% energy.

      Excuse me Einstein, your link says "almost double the current".
      How did you derived that into "200% energy"?

      We own a 2013, and I can tell you that the current 2018 is radically different than ours.

      Really? Do elaborate for us prospective Tesla Model S buyers.

    17. Re: The difference. by WindBourne · · Score: 1

      uh no.
      It is TESLA, that reduced the cobalt used in the cells.
      You will notice that it is Panasonic (using Tesla's R&D) that will remove ALL COBALT from their li batteries soon.
      LG is currently using 612 (i.e. 6 parts nickel, 1 part Manganese, and 2 parts Cobalt), and trying to get to 811.
      Tesla 2170 started several years ago as 811, and they are working to change it to 810. IOW, Cobalt will be a none-issue for Tesla on the next version.

      --
      I prefer the "u" in honour as it seems to be missing these days.
    18. Re: The difference. by Anonymous Coward · · Score: 0

      Here's the criteria a country has to meet to be named a currency manipulator:

      Have a significant trade surplus with the US
      Have a "material" current account surplus with the US
      Be engaged in "persistent, one-sided" intervention in the foreign exchange market
      Thailand, South Korea, Japan and India all met two out of three

      So it's not a manipulator according to your own link...

      4 countries are close to being named currency manipulators — but not China

      Don't forget the headline too next time you start ranting about currency manipulation.

    19. Re:The difference. by K.+S.+Kyosuke · · Score: 1

      Bananas are not a substitute for apples. Battery cells often are a substitute for battery cells.

      --
      Ezekiel 23:20
    20. Re: The difference. by AmiMoJo · · Score: 1

      Um... So, why can't LG do that too? I mean, if it's a good idea, why wouldn't they be working on it too?

      By the way, the Google search you linked to says Panasonic did it. No mention of Tesla R&D... Which makes sense, I mean why would Tesla set up an R&D operation when Panasonic already has one and they work together anyway?

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    21. Re: The difference. by WindBourne · · Score: 1

      The 2170 R&D is 100% Teslas and the article is wrong about it being Panasonic. Panasonic manufacturers the battery, since it is their equipment. But it is Tesla's instructions.
      Tesla has devoted a LOT of money to R&D. In fact, some 17% of their revenues goes to R^D. That is one of the largest in the world.

      --
      I prefer the "u" in honour as it seems to be missing these days.
    22. Re: The difference. by WindBourne · · Score: 1

      OH, BTW, LG can do the same. In fact, they are working towards that. They have to figure out how to manufacture it correctly, or they will have either shorter lifetimes, or possibly fires.

      --
      I prefer the "u" in honour as it seems to be missing these days.
    23. Re:The difference. by torkus · · Score: 1

      So 1) your 'contribution' is even more redundant and useless and 2) as typical for a PM, you'd more interested in defending your incorrect viewpoint than understanding the context and moving the project forward.

      No one said we were making Apple pies.

      --
      You can get rich if you own a politician, but you have to be rich to buy one in the first place.
    24. Re: The difference. by Anonymous Coward · · Score: 0

      the article is wrong about it being Panasonic

      But that's your own google search results.
      Have you tried bing or baidu?

      But you also tried to sneak through "double the current" as "200% enegry", which are completely different quantities.
      If you are being deceptive about basic engineering physics, why should anybody believe your basic engineering provenance?

    25. Re:The difference. by K.+S.+Kyosuke · · Score: 1

      What is "incorrect" about my viewpoint? This wouldn't be the first time that, for example, power tools had switched cells. What "project" are you talking about?

      --
      Ezekiel 23:20
  5. Would /. dry up if it weren't for Musk? by AlanObject · · Score: 2

    We just had a Musk/SEC/Fraud thread, so I checked in here and was amazed to see about 7 posts and not one yet called Musk delusional. The haters are off their game I guess.

    What I would like to know is:

    1. Will the Model S and Model X ever get a retrofit to the 2170 battery type? What are the economics of this? Is there a reason now not to do it?

    2. Is Tesla planning on selling these batteries to other EV makers?

    3. How much of the production of the Gigafactory allocated to the Model 3 verses the power wall product?

    1. Re:Would /. dry up if it weren't for Musk? by Cyberax · · Score: 1

      Tesla S retrofit is theoretically possible but it's highly unlikely. The original Model S battery pack was designed for rapid pack switching. This proved to be unnecessary, so it's likely going to be removed in favor of more space for batteries.

      Model S also badly needs a refresh, so it's likely they are going to redesign its battery pack for the next version. Theoretically it would give a boost of around 10% of the range, giving almost 400 miles for the highest model.

    2. Re:Would /. dry up if it weren't for Musk? by Cmdln+Daco · · Score: 1

      Is Tesla planning on selling these batteries to other EV makers?

      I would think it would be Panasonic selling the batteries to other makers. Why go through a middle man?

    3. Re:Would /. dry up if it weren't for Musk? by cheesybagel · · Score: 1

      It's kinda like the Tetra Pak business model.

    4. Re:Would /. dry up if it weren't for Musk? by WindBourne · · Score: 2

      Not sure why you think that MS needs a refresh.
      We own a 2013, and I can tell you that the current 2018 is radically different than ours. Basically, Tesla constantly improves the cars (iterative design), while other car makers have to do the refresh due to no improvements (waterfall design).

      --
      I prefer the "u" in honour as it seems to be missing these days.
    5. Re:Would /. dry up if it weren't for Musk? by Cyberax · · Score: 1

      I have 2015 Model S and a shiny new Model 3.

      The central console computer in Model S is woefully underpowered, the interior needs a little bit of update. More importantly, the air conditioner and heating need to be buffed up a little bit - both are not quite adequate for most extreme conditions. It would also be nice to have HUD, laser headlamps and webcam mirrors (in Europe).

    6. Re:Would /. dry up if it weren't for Musk? by Anonymous Coward · · Score: 0

      We own a 2013, and I can tell you that the current 2018 is radically different than ours

      Really? In what way(s)?
      BTW WindBourne, why do you have only three posts in total at teslamotorsclub.com? (all three within days one year ago when you registered at that forum).
      I'm sure your fellow Tesla owners will be quite happy to engage you in your common passion for Tesla cars.

    7. Re:Would /. dry up if it weren't for Musk? by Anonymous Coward · · Score: 0

      in Europe

      But you stated you were in Seattle Washington over at teslamotorsclib.com?
      You haven't posted anything for two years though (Oct 19,2016 was your last post).

      I have a shiny new Model 3.

      Looking forward to reading your experience with TM3 over at model3ownersclub.com (I see you're not signed up there yet).

      BTW Cyberax, how are you charging both at night?
      You're not stealing electricity from your neighbor are you?

    8. Re:Would /. dry up if it weren't for Musk? by Cyberax · · Score: 1

      Yes, I'm in Seattle. I don't really follow the Teslamotors forums anymore - just not very interested. As for charging, my garage holds both cars so I have no problems with plugging them in.

    9. Re:Would /. dry up if it weren't for Musk? by Rei · · Score: 1

      The last we heard, a S/X refresh was planned for 2H 2019. Although there will likely be minor updates before then. In addition to updating the screen and computer, they've also talked about moving to the Model 3's vent system. Although it's not clear whether that would be before or during the refresh.

      So long as they can move 100k/yr S+X, they have no need to improve things, because that's all the 2170s they have. And since the global EV market keeps growing, "100k/yr" is an ever-shrinking fraction of the total. So it's obvious why they'd rather focus their efforts on the 3 ramp, getting its volumes and margins up.

      --
      "Who the hell is Nietzche? It's a question stupid people are asking." -- Newscaster, "Jesus Christ Supercop"
    10. Re:Would /. dry up if it weren't for Musk? by Daralantan · · Score: 1

      We just had a Musk/SEC/Fraud thread, so I checked in here and was amazed to see about 7 posts and not one yet called Musk delusional. The haters are off their game I guess.

      There are too many targets for people to make angry comments at nonstop right now I guess. More and more political spam ammunition gets loaded up everyday. I guess Musk someone got shoved aside.

      2. Is Tesla planning on selling these batteries to other EV makers?

      I would imagine they'd only start selling the batteries if they felt like they were going to completely lose the car market. I do very much want to see more battery developments like what Tesla has been doing so far. Seeing it used as backup power in other countries seems interesting and possibly promising.

  6. Musk is a narcissistic egomaniac, full stop. by Anonymous Coward · · Score: 2

    We just had a Musk/SEC/Fraud thread, so I checked in here and was amazed to see about 7 posts and not one yet called Musk delusional. The haters are off their game I guess.

    .

    Calling people "haters" is a childishly simple-minded response to a situation that is far from black and white.

    I watched the entire Rogan : Musk interview, and I don't think Musk is delusional, but I do think Musk is full of himself in a way that would cause some people to dislike him. Musk exudes the sort of arrogance that can literally cause some people to want to beat a person up. It's painfully obvious that Musk is _all about Musk_ despite all Musk's bullshit posing about "saving the planet".

    I didn't hear one single thing during that interview that made me believe Musk is some kind of amazing genius. Musk is obviously well read, but I don't think he is nearly the genius that some people seem to think he is. I'd match wits with Musk any time, and I know a number of other people who could do so as well.

    Musk is a skilled bullshitter and he can make himself appear to be a person who knows everything about everything, but if you have a good command of the subject Musk is discussing, it quickly becomes apparent that Musk is a person who has "book knowledge" which makes him appear to be an expert when the truth is that he is not.

    Musk has repeatedly displayed VERY poor judgement, and two examples that come to mind are Musk calling the cave rescue guy a "pedo" and Musk's tweet about taking Tesla private. It's not clear if Musk has a self-destructive streak or if Musk simply has poor impulse control. It IS clear that Musk has serious issues relative to narcissism and his own ego and that he will lash out at people he perceives have insulted him, when a person who has better self-control might wisely choose not to comment at all.

    Musk is a scam artist. PayPal was and is a business that smart people choose to avoid. Tesla cars are toys for rich posers, made by a company which is owned by a rich poser. I suspect the Space X stuff will fall by the wayside when Musk finds something else that amuses him. The tunnel thing was just a rich guy playing with big toys rich guys can afford.

    I think Dean Kamen has done more for the world than Musk has done. Kamen created a portable dialysis machine that changed the lives of many people for the better. Musk has done no such thing.

    If you are going to respond to what I wrote, at least make the effort to write something that is not childish.

    1. Re:Musk is a narcissistic egomaniac, full stop. by Anonymous Coward · · Score: 0

      If you are going to respond to what I wrote, at least make the effort to write something that is not childish.

      I know you are but what am I?
      But seriously, you seem like a logical thinker. Maybe you should ask yourself why you dislike him so much?
      You say he's arrogant. To me he seems to be on the spectrum somewhere around mild Aspergers. So he doesn't have a winning personality...who gives a shit? How many nerds do you know with a charming wit? Read your own post back to yourself. You're not exactly SNL comedy writer material. Who cares?
      Sure, Paypal is horrible, but name a financial institution that isn't the work of the devil. He took that money and tried to do a couple of extremely cool and extremely risky ventures. From where I've been sitting, he's almost single-handedly dragging humanity to Mars. NASA was sure as shit never going to get there any time this century until he came along and rocked the boat. AND...he's pushed the automotive dinosaurs into producing EVs finally. Once again, no one seemed to be vaguely interested in doing it until he came along and showed it was possible. For no other reason you've got to give the guy some fucking credit for that. If you don't then all I can say is that you're a sad, jealous, tiny little individual with a enormous, totally unjustified superiority complex. Unless that's you Bezos??

    2. Re:Musk is a narcissistic egomaniac, full stop. by Anonymous Coward · · Score: 0

      Wanna see a rich jerk? Dan Pena has one of the worst personalities you'll ever see. Watch a youtube video or two and you'll see.

  7. Re:KAVANAUGHT by Anonymous Coward · · Score: 0, Informative

    He's already had the FBI look at him 5+ times, including right before this confirmation.

    It's almost like Democrats want to waste time and delay this thing until January. Now only if they hadn't shit the bed when they used the "nuclear option" and remove the cloture vote filibuster for judicial nominations...

  8. got a technical question about these batteries by morethanapapercert · · Score: 2
    Back when Tesla first announced that they were going to use 18650 (laptop and cordless tool) batteries, I remember thinking how crazy that sounded because you'd need to use literally thousands of them. It might give you a lot of flexibility in the form factor of the final packs, but it seemed to me that there were too many downsides:

    1) A shit load of welded/soldered connections to manage, which probably adds to the resistance of the final pack by some non-trivial amount.

    2) Lots of smaller cells, each individually packaged, then packaged in a larger module and that module incorporated into the final pack. That sounds like the ratio of weight of packaging to weight of electrochemical material is pretty bad.

    The situation with the new larger 2170 batteries is a bit better, especially on the total current output. But the issue with so many connections and total weight of packaging still seems high.

    Can any one give me technical reasons why small cylindrical cells like this would be superior to pouch or prismatic cells? I always assumed that a good car battery would resemble the form factor of car starter batteries, big rectilinear shapes putting out decent voltage but a shit-load of amps. The only advantage I can think of for the cylindrical format is ease of roll to roll manufacturing. But even there, unless there is some problem with bigger cells (dielectric breakdown at higher amps maybe?) a larger cylindrical form would be better wouldn't it?

    --
    I need a wheelchair van for my son. Help me get the word out. https://www.gofundme.com/wheelchair-van-for-jj
    1. Re:got a technical question about these batteries by Rei · · Score: 4, Informative

      Tesla has among the highest pack energy densities in the industry, so your notion about the weight of the packaging killing them obviously doesn't ring true.

      The Model 3 packs are put together like giant motherboards. The cells are literally bonded to 2 meter-long PCBs. I doubt you'd argue that all of the bonding that motherboard manufacturers do (capacitors, resistors, etc) is some prohibitive cost ;) The bonds on the cells in the 3 are very thin wires that double as fuses; if a cell short circuits, it melts its wire bonds. Because there are so many cells in a brick, it's easy for current to be routed past it. You can't do this with large prismatic cells, at least not as effectively.

      As for technical reasons for going with small cylindrical cells, there's a couple of them. One is the resilience against failure aspect mentioned above; Tesla packs are designed to allow for cell failures with only a trivial impact on the owner. The other is that they offer a high surface area to volume ratio. This is critical for cooling, mainly during supercharging. Tesla has prioritized effective removal of heat, as they offer much higher charge rates than everyone else.

      Note that there's a common myth that the S and X packs "overheat" during sustained high power driving, and this is why the S and X can't do sustained track duty. This is incorrect; pack temperature is always kept down and does not correspond with throttling. As can be seen from CAN bus readings, throttling corresponds directly with motor temperature. S and X use (inefficient) induction motors. 3, by contrast, uses a much more efficient PMSRM and sees only mild throttling (similar to that experienced in many modern performance gas cars) in sustained track usage.

      --
      "Who the hell is Nietzche? It's a question stupid people are asking." -- Newscaster, "Jesus Christ Supercop"
    2. Re:got a technical question about these batteries by denis-The-menace · · Score: 1

      I just say this yesterday:

      The Truth About Tesla Model 3 Batteries: Part 1
      https://www.youtube.com/watch?...

      The Truth About Tesla Model 3 Batteries: Part 2
      https://www.youtube.com/watch?...

      It explains EVERYTHING.
      Why they switched batteries (Pros/cons)
      Why they went with cylinders instead of what the competition is doing.
      Why the Model 3 is so slow to come out and why it should get better.

      (Disclaimer: I own no Tesla stock)

      --
      Obama's legacy: (N)othing (S)ecure (A)nywhere and (T)error (S)imulation (A)dministration
    3. Re:got a technical question about these batteries by Anonymous Coward · · Score: 0

      To expand on this: a Model3 has 47 cells in parallel, 96 cells in series. If a cell dies, it reduces the maximum horsepower by 1/47th and the total capacity by 1/4512th. If an additional cell dies, it is highly unlikely it is in the same row as the other dead cell, so maximum horsepower is not reduced, and the total capacity is now reduced by 2/4512. So dead cells are like dead pixels in monitor; a few are no problem, there is no need to replace them, and so the cells can be soldered and ultrasonicly welded in place. This gives extremely good electrical conduction, reliability, and low cost. A Model3 battery consists of 4 field replaceable units.

      Contrast this with the Porsche Taycan. It has 2 cells in parallel, 200 in series (I think). A single failed cell means a 1/2 reduction in horsepower, so must be replaced. The Taycan has many more field replaceable units, which means higher cost, higher electrical resistance and less reliable socket connections, and more weight.

    4. Re:got a technical question about these batteries by philmarcracken · · Score: 1

      This is pretty off topic but I'd like to pick your brains about the tesla batteries which they will sell for powerwalls in homes and a different chemistry for the same job: https://redflow.com/products/r...

      To me the powerwall would seem to be a much simpler thing, no pump required etc but lose some capacity over the years. But is that a trivial amount of loss?

    5. Re:got a technical question about these batteries by Agripa · · Score: 1

      Can any one give me technical reasons why small cylindrical cells like this would be superior to pouch or prismatic cells? I always assumed that a good car battery would resemble the form factor of car starter batteries, big rectilinear shapes putting out decent voltage but a shit-load of amps.

      Smaller cells result in more wasted volume and mass but this is not a limitation in a traction application and the greater surface area improves temperature control.

      Cylindrical cells are a lot stronger. Prismatic cells and especially pouch cells more easily suffer from delamination.

  9. Not buying the bottleneck statement by sjbe · · Score: 1

    Panasonic automotive executive Yoshio Ito told Bloomberg that "the bottleneck for Model 3 production has been our batteries."

    Though I cannot rule it out since I don't work there, I very much doubt that battery production is the bottleneck. It's not as if their intended production volumes are some sort of secret so if they didn't ramp up battery production to match the expected production schedule then Tesla management is be far dumber than the evidence would suggest unless there was some sort of unexpected resource constraint. I know Tesla tends to operate fast and loose but not building enough production capacity for one of the key components of the product would be insane.

  10. Re:KAVANAUGHT by Anonymous Coward · · Score: 0

    It's almost like the Rethuglicans decided to refuse to even have hearings on Merrick Garland, had the Russians hack the 2016 election, and we shouldn't even be talking about this incompetent rapist, because President Clinton should be making this appointment.

    And at this point, it's very clear that not only does "Bart O'Kavanaugh" belong on the SCOTUS, he needs to be impeached and removed from his current position, and hopefully since Maryland doesn't have a statute of limitations on sexual assault, imprisoned for his crimes.

  11. Some guesses by sjbe · · Score: 1

    1. Will the Model S and Model X ever get a retrofit to the 2170 battery type? What are the economics of this? Is there a reason now not to do it?

    I would guess they'll probably do it whenever they do a major refresh of those vehicles. Changing the supply chain and production system for such a major component would be expensive so it's unlikely they would have enough retrofit business to justify the cost. Right now Tesla needs to focus on getting to profitability with their Model 3 before they worry about stuff like retrofits.

    2. Is Tesla planning on selling these batteries to other EV makers?

    Hard to say but my guess would be eventually yes provided that they can establish some sort of sustainable advantage in battery production/cost as well as excess capacity. Right now I imagine they are using as many as they can produce internally and will be for some time to come if the company continues to grow.

    3. How much of the production of the Gigafactory allocated to the Model 3 verses the power wall product?

    I think the answer is obviously mostly for the cars at present. Can't give percentages but sales in their solar and storage division was about 10% of company revenue so presumably the answer is something close to 90/10.