Giga Texas // My Experience and What I Learned
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- Опубликовано: 6 авг 2024
- This video is about my trip to Giga Texas for the Cyber Rodeo and Teslacon Texas. I share my experience and what I learned about Tesla's in house cell manufacturing, structural pack, and gigacastings.
Five years ahead pack analysis:
• Did Tesla reveal a mov...
Tesla Economist Standard Range AWD Model Y:
• Model Y AWD Specificat...
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Timeline
00:00 Introduction
00:25 My Experience in Austin
03:40 The Scale of Giga Texas
07:10 What Tesla Delivered on
15:58 Bonus Points for Tesla Engineering
18:52 What We're Missing
22:11 The Standard Range AWD Austin Model Y
24:18 Summary
#BattChat #BatteryTwitter
Intro Music by Dyalla: Homer Said 
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The heat exchange is function of delta T, fluid velocity & contact area (other complex factors, lets ignore for sake of simplicity). Fluid Velocity will be limited by pressure loss, after certain velocity in given area, pressure drop start increasing sharply, means need bigger or more power hungry pump. Channel size effect but they cannot put too much of bigger channel. So we end up with temp. gradient as you said, in a straight loop. Lets assume heat generated by each cell would result in temp rise of 5 degree C after equilibrium with coolant in ideal condition, now coolant enters at 30C and first cell is at 35C, after heat transfer fluid get heated up, lets assume that last cell sees fluid at 40C, now that cell will have to be at 45C to transfer heat, (numbers I am just assuming). Thus creating a large temp. gradient, so they will have to either chill/cool the liquid further if they dont want to reduce last cells temperatures, but now this would cool he front cells even more effecting their performance. so whole pack is kind of unbalanced.
With the U shape cooling, the coolant at top is at lowest, again 5 degree differential is required, now the top potion of channel start getting hot with each cell, gets hottest at the end and then circle back, it would be something like this, again ficticious numbers,
30.0 - 30.5 - 31.0 - 31.5 - 32.0 - 32.5 - 33.0 - 33.5 now loop back
37.0 - 36.5 - 36.0 - 35.5 - 35.0 - 34.5 - 34.0 - 33.5
If you add the above and bottom temperatures and average out, the avg temp is 33.5 on each cell and cell wall itself act as a heat transfer from lower ribbon portion to top portion while cooling the cell. Now this create an another challenge how to tackle the gradient created on the first cell. I think (it makes modeling and thinking much more challenging, maybe someone more experienced can chime in) what they would do is cap the end of channel going into the header for tubing connection and have side holes in it, such as that first channel open to right, next to left, then next to right and next to left an so on, its not complicated process, end die hole punchs and then sealing the end, I made a rough sketch which illustrates this, download it from imgur link.
imgur.com/5IVqSkl or i.imgur.com/5IVqSkl.png
This way its like having multiple adjacent paths and thus the differential between the ribbon will be much less and overall average temp. be better. But I am not sure if they will be going like that, maybe their simulation shows its no necessary.
Oh wow! Cool! So many fricken smart people in the comments section.
I love youtube, you get such great comments.
@@thelimitingfactor Thanks, I am using basic knowledge btw being mechanical engineer, there's a whole field of thermal design and heat exchangers etc and we can safely assume they have smart people working on it, along with CFD softwares.
A comment I wanted to share made by Jim Keller
ruclips.net/video/G4hL5Om4IJ4/видео.html
Is it an actual U? Maybe it's counter flow. With a U is seems you'd still have hot and cold ends of the battery pack. However, if you made the top coolant enter on one end and exit the other, while having the bottom coolant enter on top's hot end and exit on the top's cold end, then then entire pack average would be closer.
Coolant Temps after each cell might look something like this:
Counter flow
Top: ->30C-35C-40C-45C-50C->
Btm:
Doesn't counter flow seem better? Delta T from the top and bottom of each battery might be higher though. Interesting problem.
Any Deta T between two bodies will result in heat transfer.
FYI The temperature gets hottest at the center of the pack, where conduction to the edges is lowest.
It was AWESOME meeting you in person and getting to know you and talk to you at length, as well as your brother. I’m excited to see our friendship continue!!
Hell yeah man! Great connection and I'm looking forward to seeing you in Austin again. I'm a bit homesick for it - I enjoyed myself too much.
@@thelimitingfactor COME ON DOWN! You know our home is open!
This whole vertical stack manufacturing is going to be incredible when it hits it's stride.
Getting it going is a bit like a heavy flywheel, starts slow, but once it's spinning it'll be poetry in motion - unstoppable!
So grateful we have resources and brain power like Jordon on the ground to support the mission all along. Let’s go.
Thanks for adding so much depth to what was presented at the rodeo. Your “tubes” are exactly what this old engineer wants to see.
Agreed!
Best thing about TSLA retirement is that I get to watch these videos as soon as they come out. Thanks!
LOL! 🤜🤛
According to Joe Tegtmeyer the Austin factory tour revealed only 10% of the floor space. It's humongous!
I saw that just after I posted this! Pretty incredible!
Humongous? No sir. My math shows it's somewhat larger than that. ;)
Agreed.
How did you make your comment 9 hours ago, well before the video was released?
@@favesongslist Patreons get early access.
Small time casting professional here, I imagine the tanks are part of a big heat pump, as you would want BOTH heating and cooling for a rapid casting operation.
pre-heating your mold prevents condensation, steam pockets/explosions and gives you more time for your metal to flow before it solidifies.
As you cast your metal, the mold heats up further than the recommended mold temperature and needs to be cooled down.
You may want to rapidly cool the mold after casting is done so you can remove the object more quickly, keep in mind cooling metal isn’t a switch, if it’s not cold enough then just picking it up your casting when it’s too close to casting temperatures but still “solid” can warp, bend or break the aluminum.
So you may end up cooling the machine below casting tempature before Removing the object
then re-heating the mold, then need to re-heat the machine for the next injection.
then casting.
Cool thing about heat pumps, is that you can run them either direction to get things hot when they need to be hotter, and then reverse the flow to cool things down.
Nice! Thanks for the input. I appreciate insightful, boots on the ground comments like this.
Any idea if the tanks are perhaps also pressure vessels? If they have pressurized fluid it would improve flow rate through the press' cooling channels, but I'm uncertain whether this would be practically helpful to the process.
I would assume the heat pump is not reversing. One tank kept hotter and one cooler, and you flow from one tank to the other through the mold to heat or cool it. I think that's a simpler solution.
Hope you realize you are now amongst the best ev, battery utubers . Your information and method of explaining is great
I like how appreciative you are for your friends for their contributions to your life.. Nice way to start this video.
🤜🤛🔥
It's incredible how far they are ahead of their competitors in... Literally everything. It's like comparing the technological mastery of the Roman empire to the total lack of innovation in the Ottoman.
The total lack of innovation in the -Ottoman- Automan. ;-P
@@trashmail8 bwahahaha
The Ottoman Empire... What is that, an entire civilization based on putting their feet up? (Seinfeld)
@@willinguyen1 it's kind of the. They had a good military and happened to be well situated geographically to become a trade hub... But that's about as far as it went. They didn't do any of the Grand or impressive or innovative things their peers did, much as they tried to pretend to the contrary.
@@abowden556 thanks, but did they invent the ottoman? Lol jk
I'm so glad you got an invite, haha. You definitely deserved one.
Thanks for this excellent video! As you mentioned, the physical plant is a fun and good place to work. The photos you highlighted of some of the people you met; These speak volumes! High quality humans, everywhere, doing the best they can to boost hope for the future of humanity . Heartwarming indeed.
OMG! Jordon you win the bingo for most pictures with a favorite RUclipsr! Thanks for sharing your experience and your journey of discover that you take us on with Tesla. Your ability to formulate and educate the information you receive with us has been truly beneficial, educational and fun. I'm glad you felt the love in Austin... we have a lot of good will and faith in this community and I hope that never changes!
I feel like in an amazing class in engineering that even a dummy like me can understand. Thank you so so much.
The true brilliance of the new pack design is it allows the use of different battery chemistry at the cell level while at the same time maintaining a standard capacity at the pack level simply by adding or removing one of the double row strips of batteries.
Layers upon layers everywhere you look.
I am very eager to hear about the 4680 battery cell production and chemistry as soon as possible. Your analysis has been so very helpful. Thanks.
From cooling PCs, it has been observed that a coolant loop (with sufficient flow) is more like a train taking on "heat passengers", as long as the flow and heat capacity is there, "heat passengers" just come off the cooled item, into the liquid and are transported to the destination (where the heat is used to warm something ot exhausted).
More "total passengers" (total heat) = higher coolant temp.
So the temperature of the coolant stays very even throughout the loop, a function of the total heat load versus "hot spots" or gradients appearing. As long as there is enough contact area and conductivity on the hot parts to transfer the generated heat, it's all goood and temperatures stay pretty even. i.e. all parts producing x amount of heat and the same contact area will have the same temperature more or less.
Temperature change of the coolant is as a result of more or less heat in the overall volume of coolant rather than the temperature of a specific item it passes over.
In PCs it's very common to have e.g. two GPUs and maybe 2 CPUs all in one loop, the two CPUs with the same block will have the same temp and likewise two GPUs with the same block will too - even in a series loop.
U shaped in this case means inlet and outlet can be on the same side, reducing the external tubing/connections etc. I imagine - i.e. Octovalve/super-manifold connections all in one place. If chilling the coolant, it would also result in more even temperatures at start-up, prior to stabilisation (which is where you can see a difference around the loop).
Where you can see a temperature differnce is in the metal of a radiator as the hot liquid passes through it, it will be hotter at inlet versus outlet, yet the temperature of the coolant will not vary much from one location to another (again, assuming sufficient flow). If you run the flow at a low speed, you can see a temperature difference, but that means your flow is too low. ;) Depending on the temp of the hottest component, this may not be an issue, and if e.g. it results in lower power use or less noise, it is a good thing too. So, the take-away is you just increase the flow until your hottest item is at a sensible temerature and at a certain flow the coolant temp will equalise throughout the loop.
SWEEEET! Thanks for the explanation. So by coolant loop, are you also including the straight pass through? Wouldn't that still create a gradient?
@@thelimitingfactor The "loop" just means where the coolant flows. In Tesla's case, they can vary where the coolant goes and its temperature via the awesomeness of the valve/manifold and heat exchanger system. Look at plaid S system - this will be even better... 😁😉 Sorry for the typos etc. If I edit your like goes away. 😢
I've cleaned up the 1st post and added a few additions. Also you can have open vs closed loops and parallel or series. Octovalve likely has cominbations of these going on depending on what is needed.
This sounds just like under floor heating. I have it in my house. One long plastic tube snakes its way under the floor. Each tube is covering up to 25m2. The return temp is just 2 C colder than inlet. Still heats the whole house no problem even during winter at -15C.
@@bowesterlund3719 👍
Thanks for your reasonable and cogent comments. It's always an education!
As TeslaQ rages on, people like you bring it back down to earth
You heard it here, "it's game over for other auto manufacturers".
What's crazy to think about is that I would say that based on the software alone! They're so far ahead on so many fronts.
Yeah, man, it's a multi-pronged advantage. I don't think anyone has done a video or visualisation that does it justice yet.
There is a special vibe in Tesla, That makes us Happy.
Just want to say I live in Australia and so hard to meet! The content you make have helped me learn so much, and it amazing to learn all these new things and see the world in a different way! Learned more with these then I did in my science class's at school HAHA, so Thank you heaps again for the hard work you do!
🤜🤛🤠
IMO, the “materials” video you addressed near the end would be one of your most important episodes ever. Can’t wait. Wish it was already up :-)
Amen!
Love your videos. You are such a thoughtful guy.
Always great to have your insight on the goings-on there! As an engineer I appreciate the depth that you go to in your videos. Definitely the #1 Tesla channel for me!
Looking forward to your diving in raw material. To me that is everything.
I think it's amazing to see we aren't just telling each other what we find out in patents like an echo chamber, we are actually seeing results being built and delivered as final products, it's quite fantastic! It's been a few years since the rumors of the 4680 and the 500 Wh/Kg, it's great to see we are getting closer to that as Tesla refines their production process and ultimately I hope we will see dry electrode and dry electrolyte being confirmed.
There is so much love and respect among Tesla community it is inspiring
Hey Jordon
Once again, a great body of work here.
Thanks tons, or kilos, you choose.
LOL! Sure thing man
"Game over" - yes, it's going to be quite a carnage. Mid or end 2023 is my guess for when we'll see some real giants starting to come down. Thanks for the summary!
Agree, my .02c is sometime in mid 2024 it's gonna be very very apparent whose in deep shark infested waters among the legacy oems.
By then we'll have real world sales numbers on the announced gm/ford/vw/bmw/merc ev ramps.
I for one do not think they will achieve anything like the scale they are currently claiming is possible.
I mean Ford now claims 600k ev run rate by the end of 2023? Gm is at 1,000,000 projected run rate in 2025.
From what under 60k for Ford in all of last year and this year production is under last year's so far.
And gm sold under 40k total evs in 2021. Good luck I say. 😁
Let's look at one of the largest legacy manufacturers, building the lowest number of EVs and using the largest number of cells per vehicle..... Not exactly a recipe for success?
I won't even say "guess who"
@@4literv6 I think they *CAN* achieve those run rates, but that's nowhere near enough, and won't let them achieve decent margins. (with the possible exception of bigger trucks) Meanwhile Tesla is already beating those production figures right now, and the margins are at Porsche/Mercedes/Ferrari levels. There's simply no comparison, They might compete on ICE products, (while they can still sell them) but on EVs? No chance.
Thank you for the update.
It must have been so crazy to see all that in person! Glad you were able to be there! I'd also like to get schooled on this "thermal regulation 101". I'm guessing there's some benefit beyond just eliminating the return plumbing. Thanks for sharing! Can't wait to find out more about these cells and that new cooling system for gigacasting.
Lol, yeah I'm way out of my depth with thermals
@@thelimitingfactor It was great to finally say hi in person Jordan and scheme on Tesla's potential raw materials plans. The 🔋 Spice 🔋 must flow 😎👊
The relevant biological analogy might be the functioning of the kidney!
@@thelimitingfactor Greate a collective, Carvajo thermodynamic 1 and 2 best grade ever in College
Likely more complicated than this, but since heat rises, I would think you put the coolant in the top of the U where it will see the most heat and then as it makes its way to the bottom, there will be less heat, but the coolant will have raised in temperature a bit.
Always such superb content. I often go back to the battery day video, and I don't think Tesla is behind from their schedule they told about on battery day. It's been just 1.5y from battery day and they didn't say everything would be ready in 1.5y. They said something else. They are doing better than I expected.
Welcome back to home. Jordan.
One way cooling gets increasingly warmer as opposed to U cooling that's averaged out on the way back for a more uniformed temperature and all the good that comes with it
i watch tesla economist all the time, but when i hear you explain it for some reason its a lot more clear 😊
Thank you. I always learn a lot from your videos.
So enjoyable to watch your vids, thank you so much Jordan!
My PhD student here at UC Berkeley is writing a publication about how clever cooling design that creates uniform temperature can extend battery life and reduce aging. Jordan, we'd be happy to share that paper, or better yet have a Zoom discussion.
Oh cool! I don' t know if I have enough time for a zoom call, but definitely get in contact and send me that paper if you'd be so kind:
thelimitingfactor9000@gmail.com
@@thelimitingfactor
"Oh cool!'
Punstastic!!
😂😂😂
Another great video! 👍🏻
You are amazing. Love your content.
And love your style.
Thank you.
Great video. You have come a long way, great to see sooo many improvements! To the moon!
As usual, much appreciated ! Keep on truck’in, can’t wait for your next video ! 👍👍👍👍👍
YOU ARE A STAR. RETIRED 77, USAF VFW.
Great summary, Jordan. Glad you had a good time in Austin!
This video is such a surprise! Thank you.
Thanks for this great summary! Incredible journey since battery day.
Your videos are so great, well done! Great slides, sound and interesting insights. Great addition to the Tesla community, thx for sharing! much love
Always amazed with your videos, excellent presentation and you get my brain revs up. I think your videos are super useful for those that want to think imagine and stretch their fact base prediction abilities.
I'm glad you were able to go!
Excellent! Very helpful information. Love Fazad and Sandy too!
Excellent coverage! Thanks.
Thanks, love the vertical integration explanation and Tesla is last one standing due to thinking out of the box with a car plant that is so much more efficient. It’s like frictionless
I am amazed and someone should do a deep dive about how vertical integration is now a thing. We are amazed that tesla is doing it yet not long ago it was completely out of favor in American industry. It was deemed financially risky and inefficient. However, Amazon and Google seem to me as vertically integrated too. If industry would pick this trend up again like in the first half of the 1990s maybe US manufacturing would have a huge revival? Am I missing something? Why would it not work?
Jordan
As usual I really enjoyed your presentation today.
100% got something out of this one (like all of them). Thanks as always. Incredible channel. 👌
Excellent rundown on your visit to Giga Austin; best I've seen, yet including Tesla's!
It's been a while since I've enjoyed your videos. Welcome stateside! It's great to share in all your experiences again!
My grandchild loves this video and science!!
I really appreciate your deep dive. Thanks. 🙂
Thank you. Your videos help me understand the limiting factors and that gives me insights into Tsla's likely future moves, the state of their production superiority, and current production ramp. I can't thank you enough. PS there is a whole community of Tsla reporters that are also key, and combined provide the needed understanding to buffer the wild share price swings that would otherwise unnerve any investor.
One of the nicest accounts of the party that I so wanted to be at but had to just hear about. Also technically very acute. Thanks for your continuing efforts.
always good.... love all of your videos....
👍 If I were a middle or high school teacher your videos would be required viewing. Thank you! B.✌️😎
Thanks for your excellent summary of Giga Texas. Very informative and worthwhile, and I only wished that I could have been there to experience it as a long time Tesla fanatic/owner.
Jordan, best recap about the Rodeo I've seen! Thank you so much. I agree regarding competition, no more time to talk and plan, they need to start executing. But probably, it's already too late for most of them.
Appreciate your well-researched content.
Great video Jordan!
Thanks for your report.
thanks for showing your experience
You are a Kiwi? I would have never guessed. Any way thanks for the channel. I have learned a lot about battery's and chemistry from you. Thanks!
Yeah man! Dual citizen. I've lived half my life in each country.
Seen it twice. It is even better the second time.
Loved this video!
Wonderful! Thank you!
U shaped cooling channel: heat/chill picked up from 1st cell is passed along to 2nd cell & so on down the line on the 1st leg of the U, then also backwards along the 2nd leg of the U, so the whole U benefits from a stabilizing influence from the flow.
Good job sir, good job!!
What an incredible experience being able to visit Giga Austin! This facility does indeed appear to be a game changing manufacturing machine. Great to get your thoughts on observations and awesome you found some new info about pack safety and casting cooling.
Definitely perplexed about the vehicle weight and pack efficiency numbers of 279 MY. Really curious how this will shake out and what future configurations will turn out to be.
*It should be remembered accelerating 4,000+lbs of car takes a massive amount of energy compared to just keeping speed, with that it is easy to extend range by slightly reducing the speed of accelerating, I wouldn't be surprised if economy mode has a optimized reduced maximum acceleration limit to greatly extend range.* 😉😉
I work in HVAC. Typically, heat exchangers are routed in many small "U's" through the fins with manifolds on either side. Double pass coils are the most common I see. The basic idea is that the fins are a heatsink and the air that crosses them mostly exchanges heat with the surface area of those fins, not the tubes of the heat exchanger itself. The tubes and fins are physically connected by a metallic bond, so the thermal transfer is more efficient than air-to-metal. That allows the entering-coolant to cool the returning-coolant after it would be heated above the entering coolant temperature. It ensures that the returning coolant temperature will not exceed more than a few degrees of the entering temperature (assuming enough flow is provided), improving the stability of the coils temperature overall. I think the point you mentioned being made was the case of the battery shell being the heatsink, and coolant thermally conducting through the case of the battery to the other side, keeping the return coolant temperature stable. This is all air-to-refrigerant related, not solid-state, but maybe it'll help some people imagine it. Think of your condenser coil outside if you have central air - any kind of heating and cooling all use largely the same principles
If I know Musk, his engineers have probably come up with something far more complicated than what I've described. Everything I've described here is relatively basic knowledge to the HVAC industries/manufacturers. Honestly, I'm surprised they ever used a single pass system; you mostly only see that on small appliances in my trade
Interesting! Thanks for the input!
Excellent video!
This is the first time I've watched your channel. You do a terrific job. I'm a tech guy, so I really appreciate your content delivery. Nice work. I"ll be keeping up with you from here on. I look forward to checking out your other videos. Thanks for doing this. ~George
Thanks man! Glad to hear it 🤜🤛
We love ya, Morgan!!!
A fantastic breakdown as usual Jordan. I agree that the raw materials piece has to be a feature of master plan part 3. As benchmark minerals, R.K. Equity and The Global lithium podcast have all been advocating. The lithium industry is already in structural deficit and likely to stay that way until at least 2030. The 🔋 Spice 🔋 must flow.
And great meeting you man! Really enjoyed the conversation.
The spice, the melangeeee
@@Barskor1 but a bit more expensive, I'd say...
Thanks for great content
My pleasure man!
Thanks for your hard work and effort to make this channel even more than it has been. Elon isn't the only one ramping things up and meeting impossible timelines. You've been amazingly busy yourself. Seeing you fit in an international move and set up operations and get your video production going without missing a beat has been pretty impressive. And that's all while Tesla has had more issues and pressures to understand than anyone could have foreseen. Most everyone thought that covid was the terrible issue to be handled and then the Ukrainian war came along. It's made every channel have to work harder and dig deeper to understand how Tesla's numbers and production might be affected. Few pulled if off without showing the strain and you were one of them. Anyway, it's hats off to you and I'm happy to see it's working out for you. The Tesla community needs and your investigative work to continue to keep up and understand what is going on. You have given us the insight and understanding to fight so much FUD. Only wished I could have been in Austin but it was short notice and as a tax account at about the worst time it could have been at.. LOL But I"m sure that I'll be at a get together sooner rather than later and I'll be excited to get to shake your hand.
Hi Frank! Thanks for the thoughtful note, I really appreciate it. I've certainly been fully engaged, lol.
Looking forward to bumping into you at a future event.
Thanks Jordan!
The Austin Model Y is almost exactly what I expected it to be, with one exception. I did expect to see LFP 46-80 cells in the structural battery pack. It would seem that there are still some major considerations before such a thing will be built by Tesla. But yes, that is one amazing vehicle and I WANT ONE!!!.
Awesome video as always Jordan
My take on the U plumbing is that you in theory can have the same average temperature is every cell
Imagine we have a delta of 9 °C between inlet and outlet, the temperature distribution between the top and bottom path would be something like this, each column is the same cell:
10 - 9 - 8 - 7 - 6
1 - 2 - 3 - 4 - 5
The temperature inside the cells might be around 5.5 °C higher than the inlet on every cell, specially if the can has higher thermal conductivity than the jelly roll, which is likely the case. Obviously it won't be that close, but it probably can keep the delta between all cells way closer than a single direction cooling
That's where my mind was at, roughly. Thanks for illustrating and articulating it!
dead on
One really interesting topic for me is the charging characteristics. Looking forward to the initial charge curve of the SR Model Y with 4680.
The point of ushaped cooling: each cross section along the length of the double tube (considering the temperature of the top inlet flow and the bottom outlet flow) has exactly the same middle temperature. Therefore, every cell sees the same cooling temperature and ages the same amount.
Elegant explanation. Thank you!
In fact not just aging, the limiting factor for charge rate that a BMS would allow is based on hottest cell, so it is best to ensure even temperature across the pack
@@joabarrera I also guess that the electrical resistance of the cell is highly dependant on temperature. Higher resistance means higher load (more voltage drop by fixed current). So other parallel cells have to compensate by either more current or an higher/lower power delivery. Each way the cells are strained very unevenly...
those are chillers I think.
They are probably using LN2 indirectly, as in there is a heat exchange with the water-glycol loop to supercool it faster.
regarding U shaped cooling, the simple answer is because of the capacity for containing heat that the fluid has at any point along the U shaped path. when water first enters the U shaped channel it has maximum heat storage capacity, and then begins absorbing some heat (reducing the amount of capacity remaining in the fluid). when the fluid reaches the end of the line and is ready to turn around and go back to the start, it has absorbed half of the heat that it is expected to absorb, and has half of the total capacity remaining. when it reaches the end of its travels it has absorbed nearly the total amount that it needs to and has lost nearly all of its capacity.
when you look at any point in the diagram where the pack is flat and the U shape is sideways, at any point left-to-right you can basically imagine the top pipe + bottom pipe add up to 1, where 1 is the full amount of heat capacity remaining in the fluid.
This is such a great explanation
If you look at any PC water cooling radiator it's basically the same with fluid input and output on the same side, air where Tesla is putting batteries, and lots of back and forth instead of just one back and forth (like wwwwwww instead of u)
Fascinating.
The reason the U shape is better is as shown in your graphics, the first cell near the coolant port get the coolest and the hottest fluid, the lass cell of the ribbon get average temperature in both section. The end result is that each cell get closer to the same temperature and will then have a more constant voltage, charging characteristics and aging. Resulting in faster charging possible and longer lasting battery pack.
Thanks man! I try not to assume much, and assume I'm stupid, lol. It sounds like on this one, it's as simple as it looks
Thank you!
Not sure if this has been answered yet, but with regard to u-shaped cooling: the cells at the start of the loop become the most cool, and then they are physically adjacent to the cells at the end of the loop, which receive the least cooling. As long as there is some thermal coupling directly between those sets of cells, then the coolest cells at the front will provide additional cooling to the cells at the end of the loop.
If there's one retrospect on GigaTexas launch party, this is probably it.
Munro was a good one, but this is at least equal.
Hello from Serbia. Nikola Tesla was Serbian nationality, born in Croatia, but became the Citizen Of The World
Structural battery pack comment. It could be less steel in the car overall but more steel around the battery. Safety could come in the form of a stiffer battery enclosure that protects against intrusions and damage. The danger with the Teslas batteries fires is mostly related to crashes/hits/piercings less with the electrical issues or cell shorting like in the GM case.
One great advantage of the one-piece castings in a turnkey factory situation is that IF a casting emerges from the press and is tested defective in any way, they can just chop-it-up and dump it back into the vat - eventually. Discarded raw material costs and rework issues drop to nothing. However, as the Tesla guys and gals seem to have the handle turning pretty smooth at this time, I am guessing they do not really factor that in as a significant advantage.
You were incredibly brave to wear flip-flop sandals in a large crowd!
🤗👍 JORDAN…WE ARE HAPPY YOU MADE IT BACK TO NORTHERN OHIO SAFELY 🤗
IMHHO…it’s the PEOPLE THAT ARE MOST IMPORTANT AND YOU GETTING TO MEET THEM AND SHARE THIS WITH US
IS THE BEST PART 🤩🤩😎🤗😍😍😍
ALSO ENJOYING THIS SUMMARY AND YOUR VIEWS ARE VERY MUCH APPRECIATED 👍🧐😍😍😍