Eddie G. Posted September 22, 2019 Share Posted September 22, 2019 So the other day I started charging my gotway tesla like normal with the fast charger. The next day I turned it on and the unit started doing this tilting forward and tilting backwards as I'm standing next to it holding it up. I noticed it wasn't charged it was showing one bar, I then tried turning it off but it would not turn off so I had to lay it on its side and unplug the battery pack. well when I opened the side panel and I saw the battery had burned up but only a piece. I would love to insert the image but it's not letting me. 1 Quote Link to comment Share on other sites More sharing options...
EUCGUY Posted September 22, 2019 Share Posted September 22, 2019 11 minutes ago, Eddie Hea said: So the other day I started charging my gotway tesla like normal with the fast charger. The next day I turned it on and the unit started doing this tilting forward and tilting backwards as I'm standing next to it holding it up. I noticed it wasn't charged it was showing one bar, I then tried turning it off but it would not turn off so I had to lay it on its side and unplug the battery pack. well when I opened the side panel and I saw the battery had burned up but only a piece. I would love to insert the image but it's not letting me. upload on flickr or instagram and link it here. also. not good Quote Link to comment Share on other sites More sharing options...
Eddie G. Posted September 22, 2019 Author Share Posted September 22, 2019 I contacted jason from ewheels and he said he has never seen anything like this from gotway 1 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted September 22, 2019 Share Posted September 22, 2019 Really bad luck. It would be great to see a picture. You must upload your picture to a public picture hosting site (there are too many to list - Google it) and then insert the link here. That's what everyone does. As @EUC GUY suggests, Flickr offers free accounts. Quote Link to comment Share on other sites More sharing options...
Eddie G. Posted September 22, 2019 Author Share Posted September 22, 2019 2 Quote Link to comment Share on other sites More sharing options...
Popular Post EUCGUY Posted September 22, 2019 Popular Post Share Posted September 22, 2019 5 minutes ago, Eddie Hea said: my guess is that a component on the BMS board blew. not the actual cell itself. 6 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted September 22, 2019 Share Posted September 22, 2019 1 hour ago, Eddie G. said: Really bad luck. Any kind of battery failure appears to be very rare from my experience. Fortunately EWheels will be able to get you a replace battery pack. 1 Quote Link to comment Share on other sites More sharing options...
Eddie G. Posted September 22, 2019 Author Share Posted September 22, 2019 this is the other battery #2 3 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted September 22, 2019 Share Posted September 22, 2019 So both batteries failed??? 1 Quote Link to comment Share on other sites More sharing options...
erk1024 Posted September 22, 2019 Share Posted September 22, 2019 2 hours ago, EUC GUY said: my guess is that a component on the BMS board blew. not the actual cell itself. Agree. If the battery itself had caught fire, the whole pack would have gone up, and the fire dept. would have been involved... Quote Link to comment Share on other sites More sharing options...
Eddie G. Posted September 22, 2019 Author Share Posted September 22, 2019 yes both battery failed jason said 500 a piece for a replacement battery. I think this tesla will be sitting for a while I still have my msx and v10f. My msx is my main wheel for commuting to work anyways. But is there a way to repair the bms on this battery pack? 1 Quote Link to comment Share on other sites More sharing options...
erk1024 Posted September 22, 2019 Share Posted September 22, 2019 (edited) 5 minutes ago, Eddie G. said: But is there a way to repair the bms on this battery pack? You could replace the BMS. There are videos on how to build your own packs. You have to be careful though, as those batteries are live and have a lot of power. Edited September 22, 2019 by erk1024 Quote Link to comment Share on other sites More sharing options...
erk1024 Posted September 22, 2019 Share Posted September 22, 2019 Lots of videos on YouTube for building packs and adding a BMS. 1 Quote Link to comment Share on other sites More sharing options...
erk1024 Posted September 22, 2019 Share Posted September 22, 2019 1 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 22, 2019 Share Posted September 22, 2019 18 minutes ago, Eddie G. said: yes both battery failed jason said 500 a piece for a replacement battery. That should definitely fall under warranty!! What else if not a crazy double failure of the exact same component in both battery packs counts as warranty-justified?! Also this is the strangest wheel failure I've ever seen. Just for safety I'd replace the board, too. Looks to me like some external reason is responsible for the battery pack damages. That would have to be from the board, there's barely any other components. 47 minutes ago, erk1024 said: Agree. If the battery itself had caught fire, the whole pack would have gone up, and the fire dept. would have been involved... Not necessarily. Even @YoshiSkySun's rough tumble over rocks into saltwater only had the damaged cells and (maybe?) some of their immediate neighbors go up. Some other cells directly next to them didn't ignite at all. 3 Quote Link to comment Share on other sites More sharing options...
erk1024 Posted September 22, 2019 Share Posted September 22, 2019 24 minutes ago, meepmeepmayer said: Just for safety I'd replace the board, too. Looks to me like some external reason is responsible for the battery pack damages. This is a really good point. The odds of one BMS failing are small. The odds of two failing at the same time is close to zero. Probably there is some issue upstream of the battery packs that caused the problem. So I agree you want to replace the board, and take a good look a the wiring. OR Send the whole thing back to Jason and let him sort it out under warranty. 3 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted September 22, 2019 Share Posted September 22, 2019 1 hour ago, Eddie G. said: yes both battery failed jason said 500 a piece for a replacement battery. I think this tesla will be sitting for a while I still have my msx and v10f. My msx is my main wheel for commuting to work anyways. But is there a way to repair the bms on this battery pack? So this is an old, out of warranty wheel? That really sucks. I've never heard of such a failure. At that cost I'd be buying a new wheel. Unfortunately replacement batteries are just too expensive. Repairing batteries and/or BMS boards is certainly possible, but that's next-level work IMO. Something that I personally would not tackle. 3 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 22, 2019 Share Posted September 22, 2019 (edited) 1 hour ago, erk1024 said: Send the whole thing back to Jason and let him sort it out under warranty. Honestly, that's the way to go forward. With the important bolded (otherwise buying a new wheel would be cheaper and safer). Edited September 22, 2019 by meepmeepmayer spelling 1 Quote Link to comment Share on other sites More sharing options...
Eddie G. Posted September 22, 2019 Author Share Posted September 22, 2019 well this is definitely not under warranty because I bought this from someone online. so I dont know what to do with this wheel. but it is cheaper to just purchase another tesla perhaps the new version. 1 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 22, 2019 Share Posted September 22, 2019 If it's originally from ewheels (as you mentioned ewheels) and <1 year old (I think that's his warranty time) Jason should still honor the warranty. If it's not from a warranty dealer, unfortunately it looks like this is a total loss Board + batteries are the price of a new wheel (also check out Aliexpress prices) and then you at least know the wheel is good (and have spare parts from the old wheel). Unless you want to go into electronics repair - as Marty says, that would be next-level and you must know what you are doing. You should be able to get the appropriate Gotway BMSes from Ali (or somewhere) and repair the packs (if it is really only the BMSes that were damaged) with the right skills (no idea what those skills are... soldering, spot-welding(?), ...). 2 Quote Link to comment Share on other sites More sharing options...
Eddie G. Posted September 23, 2019 Author Share Posted September 23, 2019 (edited) yes this wheel is from jason so I'll see what he says but I'm trying to contact the original owner because I follow him on Instagram. thank you guys for all the options you've given me. Edited September 23, 2019 by Eddie G. Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted September 23, 2019 Share Posted September 23, 2019 A lot of people selling their wheel here mention that X time of ewheels warranty is left. So I assume Jason honors the warranty if there's an owner change. So as long as you're in that time... 2 Quote Link to comment Share on other sites More sharing options...
erk1024 Posted September 23, 2019 Share Posted September 23, 2019 (edited) 4 hours ago, meepmeepmayer said: You should be able to get the appropriate Gotway BMSes from Ali (or somewhere) and repair the packs (if it is really only the BMSes that were damaged) with the right skills (no idea what those skills are... soldering, spot-welding(?), ...). BMS' often use a plug for all the balance wires (whatever those are called). So replacing the BMS would probably require cutting open the shrink wrap, cutting or de-soldering the main power and charge wires, unplugging the balance lines. Then do the reverse to add the new BMS. And then re-shrink wrap it. TIMES TWO. But the problem remains of how they failed in the first place. So new board. Maybe new fast charger? Could be a good "learning project". Edited September 23, 2019 by erk1024 2 Quote Link to comment Share on other sites More sharing options...
yuweng Posted September 23, 2019 Share Posted September 23, 2019 i think that burnt mosfet is for charging, could it be that your fast charger is too powerful ? Theoretically, replacing it with a higher ampere mosfet should solve the problem but be careful, i think everyone of us, hands one guys here sure have experience it before, that accidental short circuit spark is really terrifying & dangerous 1 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted September 23, 2019 Share Posted September 23, 2019 1 hour ago, yuweng said: i think that burnt mosfet is for charging, could it be that your fast charger is too powerful ? Theoretically, replacing it with a higher ampere mosfet should solve the problem but be careful, i think everyone of us, hands one guys here sure have experience it before, that accidental short circuit spark is really terrifying & dangerous There's no such thing as a too-powerful charger. A charger doesn't push amperes into the wheel. It simply makes available the amperes that the BMS consumes. You can plug a 2000-amp charger into a wheel but I assume the BMS will limit it's maximum ampere draw to some value much less than 2000-amps. Quote Link to comment Share on other sites More sharing options...
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