alcatraz Posted October 25, 2019 Share Posted October 25, 2019 (edited) I don't have a tesla but I consider getting a V2 or newer. I'm curious to maybe upgrade the batteries using 21700 cells instead of 18650. The difference is 3mm larger in diameter and 5mm longer. It would mean that the twice stacked cells would enlarge the pack with about 6mm thickness, 10mm taller and 30mm wider. Is it possible to make room for it? Edited October 25, 2019 by alcatraz Quote Link to comment Share on other sites More sharing options...
Kens Posted October 25, 2019 Share Posted October 25, 2019 I don't have Tesla either but this is picture from EcoDrift website. It seems that the bracket where the battery sit leave no more room in any dimension. I don't think it will retrofit-able unless Gotway change the inner shell or reduce the number of cell and add extra padding like those 100v version of Nikola and MSX. Quote Link to comment Share on other sites More sharing options...
alcatraz Posted October 25, 2019 Author Share Posted October 25, 2019 Thanks for the pic. It helps. Tesla owners, any comments? It would make the tesla 1500Wh instead of 1020Wh. Interesting? Also could someone comment about the issue of water intrusion into the tesla v1 and v2? Is it common? Is one better than the other? Quote Link to comment Share on other sites More sharing options...
zege Posted October 25, 2019 Share Posted October 25, 2019 I ride my tesla v1 in rain all the time since I bought it a couple of years ago when it first came out, no problems at all. 1 Quote Link to comment Share on other sites More sharing options...
alcatraz Posted October 25, 2019 Author Share Posted October 25, 2019 3 hours ago, zege said: I ride my tesla v1 in rain all the time since I bought it a couple of years ago when it first came out, no problems at all. Thanks man! Good to hear... Quote Link to comment Share on other sites More sharing options...
Popular Post alcatraz Posted November 12, 2019 Author Popular Post Share Posted November 12, 2019 And here it is. An original tesla v2 with 1480Wh from the factory. ~20kg 14 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted November 12, 2019 Share Posted November 12, 2019 1 hour ago, alcatraz said: And here it is. An original tesla v2 with 1480Wh from the factory. ~20kg Nice! There's a lighter wheel with range again! What's the source of the information? 3 Quote Link to comment Share on other sites More sharing options...
alcatraz Posted November 12, 2019 Author Share Posted November 12, 2019 (edited) 8 hours ago, meepmeepmayer said: Nice! There's a lighter wheel with range again! What's the source of the information? Just an ad in the chinese 2nd hand pages. I was browsing and caught the 1480Wh. Is the bms external on all teslas? Does it have two bms's or one? Edited November 12, 2019 by alcatraz 2 Quote Link to comment Share on other sites More sharing options...
Rudy Sijnke Posted November 12, 2019 Share Posted November 12, 2019 I hope this is becoming true. A new revolution in wh Batt. Monster 3000wh? Nik+ 2400wh? Etc😄 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted November 12, 2019 Share Posted November 12, 2019 16 minutes ago, alcatraz said: Does it have two bms's or one? Two... one for each pack. Quote Link to comment Share on other sites More sharing options...
alcatraz Posted November 13, 2019 Author Share Posted November 13, 2019 Are the bms's external on all teslas? Quote Link to comment Share on other sites More sharing options...
alcatraz Posted November 13, 2019 Author Share Posted November 13, 2019 1 hour ago, Rudy Sijnke said: I hope this is becoming true. A new revolution in wh Batt. Monster 3000wh? Nik+ 2400wh? Etc😄 21700 batteries do help sometimes to pack in more capacity but they are not higher density. The wheel does become bigger and heavier by a similar proportion as when using only 18650 cells to reach the same capacity. Quote Link to comment Share on other sites More sharing options...
btl Posted February 27, 2020 Share Posted February 27, 2020 (edited) Sorry for digging this up, Looks to me like they removed the complete 18650 pack frame from the shell to mod a 21700 pack in. The BMS held in place with a gallon of hot glue does not look like a factory job, too. Since the "pre-owned" Tesla 21700 cells are quite inexpensive, one could order a 1480Wh Tesla V2 for less than 100 bucks more than the stock 1020Wh. Even if the mod showed on that pic above is not the nicest, it is tempting, 50% more capacity for less than 10% extra cash. Greets, Stefan Edited February 27, 2020 by btl pic added 2 Quote Link to comment Share on other sites More sharing options...
btl Posted February 27, 2020 Share Posted February 27, 2020 Here a pic the seller from the above offer sent me. BMS is inside the battery pack shrinktube. 2 Quote Link to comment Share on other sites More sharing options...
Meserias Posted February 28, 2020 Share Posted February 28, 2020 (edited) Link to AliExpress https://www.aliexpress.com/item/33003943158.html 2020 Gotway Tesla v2 latest new update Anti Spin Bluetooth Speaker 1020Wh 1480Wh 2000W unicycle one wheel electric monowheel Edited February 28, 2020 by Meserias 2 Quote Link to comment Share on other sites More sharing options...
Sebrios Posted February 28, 2020 Share Posted February 28, 2020 Arent the Tesla 21700 Batteries 100V? why does it say 84V? if its a 100V, I would love to have this wheel... And see some crazy people do Speed tests Quote Link to comment Share on other sites More sharing options...
Nick McCutcheon Posted February 28, 2020 Share Posted February 28, 2020 1 hour ago, Sebrios said: Arent the Tesla 21700 Batteries 100V? why does it say 84V? if its a 100V, I would love to have this wheel... And see some crazy people do Speed tests The actual cells themselves still have an individual voltage of 4.2 volts fully charged. It's mere coincidence that GW has only used them to form 100v packs thus far, but in this case, the dealer has used them to form 84v packs. 3 Quote Link to comment Share on other sites More sharing options...
alcatraz Posted February 29, 2020 Author Share Posted February 29, 2020 The capacitors on a tesla control board is rated for 100V unlike cheap inmotion v8 that are rated for 160V. You probably shouldn't try your luck. Who knows what kind of voltages you get when braking hard? Bit unsettling actually.... They should release a lightweight 100V tesla though with 2.5-3in tire. That would kick some serious ass. 3 Quote Link to comment Share on other sites More sharing options...
Popular Post alcatraz Posted February 29, 2020 Author Popular Post Share Posted February 29, 2020 (edited) About the 21700 pack in a tesla the interesting side to see is the right side with the trolley handle. The pictures are always of this left side. On the right side the pack sits wedged right between the trolley rails. If 21700 cells are 5mm taller than 18650 it means 10mm less clearance (2 stacked cells) where there's already almost no room. Furthermore, since the larger cells are 3mm thicker the pack grows nearly 6mm in thickness. This means that if the bms is still internal it must be very thin which makes me wonder if it has any current to balance so much capacity? The higher the balancing currents the bigger the balance boards. I'm not an electrician but I take it from looking at some bms boards and comparing balancing currents. Edited February 29, 2020 by alcatraz 4 Quote Link to comment Share on other sites More sharing options...
xorbe Posted February 29, 2020 Share Posted February 29, 2020 2 hours ago, alcatraz said: About the 21700 pack in a tesla the interesting side to see is the right side with the trolley handle. The pictures are always of this left side. The picture set actually shows it once on one side, and once on the other! Quote Link to comment Share on other sites More sharing options...
alcatraz Posted February 29, 2020 Author Share Posted February 29, 2020 35 minutes ago, xorbe said: The picture set actually shows it once on one side, and once on the other! With the 21700 pack installed? Where? 1 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted February 29, 2020 Share Posted February 29, 2020 8 hours ago, alcatraz said: The capacitors on a tesla control board is rated for 100V unlike cheap inmotion v8 that are rated for 160V. You probably shouldn't try your luck. Who knows what kind of voltages you get when braking hard? Bit unsettling actually.... Why would one 84V pack produce higher voltages than the standard 84V pack? Both 1480Wh and 1020Wh Tesla are 84V. This mod is literally just replacing each 18650 cell with a 21700 cell. 8 hours ago, alcatraz said: They should release a lightweight 100V tesla though with 2.5-3in tire. That would kick some serious ass. They have a wheel of that kind in the works. More likely than not it will be a 100V wheel because they yet only built 100V batteries after the switch to 21700s, and there seems to be no 84V MSP as well. A wide tire also seems to match the direction GW is going. So you can be optimistic there 1 Quote Link to comment Share on other sites More sharing options...
chopsywa Posted February 29, 2020 Share Posted February 29, 2020 Fitting that the 21700 batteries are going into a Tesla. 1 Quote Link to comment Share on other sites More sharing options...
alcatraz Posted February 29, 2020 Author Share Posted February 29, 2020 (edited) 2 hours ago, meepmeepmayer said: Why would one 84V pack produce higher voltages than the standard 84V pack? Both 1480Wh and 1020Wh Tesla are 84V. This mod is literally just replacing each 18650 cell with a 21700 cell. I was referring to the idea of running a 100V battery pack in the current Teslas. If that wasn't implied then I apologise the confusion. Edited February 29, 2020 by alcatraz Quote Link to comment Share on other sites More sharing options...
NMorgado Posted March 2, 2020 Share Posted March 2, 2020 New tesla 1480wh is a bit heavier. 21.3Kg :) Still lighter than the others with same capacity 1 Quote Link to comment Share on other sites More sharing options...
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