Overly discharging cells causes damage to them, but I have recharged cells in this state and continue to use them today. That article is pretty much what I would do. I wouldn't charge LIPOs like that on my living room carpet, but at my bench on top of a piece of metal or in the garage on something that won't burn, so I'm not concerned about burning LIPOs. Having said that...it's a precaution...as along as the battery doesn't get overly hot, it wont burst into flames. I recommend that you try to restore your LIPOs. Or you can give them to me. I'll pay for shipping. I know I can get them back to a good state again.ApacheXMD wrote:Ouch that sucks man.
If you're feeling brave, you can try to SLOW charge the bad cells to bring them back up to voltage.
Here's an article about it:
http://www.electricrcaircraftguy.com/20 ... LiPos.html
But IMHO, it's not worth the risk of setting your house on fire.
If you do attempt to recover your LIPOs they are only a possible problem while you are trying to recover them. Once you have them back to their normal operating voltage range, they will work like they did before. They won't suddenly burst into flames when you charge them. Next time get LIPOs with higher C rates. Those 10C cells were probably drooping pretty badly when you were accelerating. Next time go for 35C packs.shortcircuit911 wrote:Thanks for the article apache, very interesting.
I'm still undecided on what I'm going to do. I'd like to revive my lipos but I don't want to be worrying about them if I do. Two controllers on on that 10c pack is pretty rough when I get on the throttle (all the time). I'm really considering just getting a new pack, probably something with a BMS. I think 20c is probably the minimum discharge rate this scooter needs. I still haven't seen full potential out of this thing because I never turned the current limiting up on the controllers. I think it would be cool to also bump the voltage up a bit too and get a few more mph out of it. These are all just ideas, I haven't really looked into what I'm going to do, but it sucks not having my scooter. I'm not sure what the current shipping laws are for lithium, but maybe I'll just sell these packs cheap, I also have a 36v 8.8ah pack that the scooter came with to sell.
EG PM if you're interested, maybe we can work something out.
$2500...damn...that's a little smaller than my $600 scooter. It's a cleaner build for sure and made out of aluminum. Mine is all steel so it weights a lot more. The swing arm suspension is interesting. Of course with no shocks they can't be adjusted or stiffened if needed.Cotemar wrote:Maybe you can get some ideas from this dual wheel drive scooter.
http://www.passiongadgets.com/preorder- ... otors.html
You rode what? 2 Days and then you've torn it all apart. LOL!shortcircuit911 wrote:Damn those are some expensive controllers. I'm pretty much at budget for this scooter, but those are definitely good candidates for future projects. I really like how compact they are, and modding them per your suggestion would make them killer. I kinda dig that look of both the controllers on my scooter, they get good air flow (not that they're working hard), and they're performing really well.
The grip tape is also another great idea, its worked well for me in the past on my brushless e300. I had something special planned for the new deck and the grip tape would cover it up. After i made the deck I coated it with "the good stuff" and its been doing a good job of protecting the wood. I like your idea of adding weather strip, I may just do that. I want to pain the scooter so it looks nice so I'm just going to weld the extensions on to the frame, the 3/4" strip will give me a bit of extra room for the wiring. I got the scooter stripped down to the wheels which I'll remove before welding. I'm going to stay a little late tomorrow to weld it up at work, then I'll start painting it.
The xlr does have a cover, its pretty sweet how it swivels out of the way when you open it. I'm liking the location of the charger port, its really convenient when charging it up and I don't feel its in my way when I'm riding. I'll post some pics of the welding and painting soon.
How is the charger I built working out? I'm sure you have used it a few times by now...OK quite a few times!shortcircuit911 wrote:Well I spent a few days getting the scooter back together and made some tweaks in the process. I ended up notching the back of the battery box to allow more room for the wiring to feed into the battery box. Reassembling the scooter was a bit of a struggle because I had to do it late at night when i was super tired, but I got it done. This thing is so much fun to ride in SF. I was flying by mopeds and cars on the street, got some baffled looks from people lol. I was riding the other day and got a blow out in the rear at about 20 mph, the rear end started washing out so I pulled over to asses the issue. Unfortunately these tires are tubeless and not easy to find locally. I was able to track some down on ebay and bought the sellers last set. I really hope they get here quick, unfortunately they're coming from china so we'll see. While waiting for the tires to come in I'm going to put the finishing touches the wiring and get the rim prepped so installation goes as smooth as possible. Also planning on starting the deck soon. I hate waiting for parts...