Search found 544 matches

by nomad85
Jun 08 2016 8:15pm
Forum: Battery Technology
Topic: Simple balancer for lipo, will it work?
Replies: 8
Views: 918

Re: Simple balancer for lipo, will it work?

You cannot use those boards. It will 100% cause total destruction. The only thing that can make this work is if you put each of them on a isolated dc-dc converter or use a 4.2v isolated dc-dc converter but those dont exist. Lol thanks for setting me straight, I bought a few, I'll just use them as s...
by nomad85
Jun 08 2016 10:37am
Forum: Battery Technology
Topic: Simple balancer for lipo, will it work?
Replies: 8
Views: 918

Simple balancer for lipo, will it work?

Hey, I have been away for a few years(like 4-5 years!! jeez) ever since my lipo battery got overcharged due to my dumb charging setup. I got the urge to get the bike back in operation and wanted to run an idea past you guys. Looks like the bulk charging for 20s lipo packs has hope now that lunacycle...
by nomad85
Feb 15 2012 1:55pm
Forum: Battery Technology
Topic: Argh! Overcharged to 4.5v
Replies: 45
Views: 4427

Re: Argh! Overcharged to 4.5v

I ruined my batteries the same way, never got to 4.5, but they got to 4.3 a couple of times. Some still work but have 50% capacity, and many have dead cells now. If I rebuild the pack I plan to use one of the bmsbattery chargers ( http://www.bmsbattery.com/18-alloy-shell ) with reliable voltages, th...
by nomad85
Feb 15 2012 12:37pm
Forum: Battery Technology
Topic: Basic LiPo Charging
Replies: 74
Views: 15167

Re: Basic LiPo Charging

Nice photos :-) If you run a discharge cycle how many mah do you get out of that turnigy? 20C *5Ah=100A Hello "theprince"! welcome to Basic LiPo Thread: The answer to nomad85's question would not be in Amperes, but in "Ampere-hours" (he says "mah", same thing). To get that number, you would multipl...
by nomad85
Jan 28 2012 2:16am
Forum: E-Bike Build Threads / Photos & Video
Topic: Oatnet's x5403/Norco A-line, and Front-Mount battery stuff
Replies: 240
Views: 46636

Re: ??????? vs x5403 - Fight!

I think the challenge is canceled due to the low kv of the cromotor.
by nomad85
Jan 26 2012 7:24pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Oatnet's x5403/Norco A-line, and Front-Mount battery stuff
Replies: 240
Views: 46636

Re: ??????? vs x5403 - Fight!

Did a 30km ride with the front mount pack this morning. Couldn't even tell it was there. The mount on these bags is very well designed and with the bag being completely full of LiPo, there is next to no movment in it. Its a keeper :) Thanks for your perseverance and guidance on this one oatnet. 8) ...
by nomad85
Jan 26 2012 12:13am
Forum: Battery Technology
Topic: Basic LiPo Charging
Replies: 74
Views: 15167

Re: Basic LiPo Charging

Nice photos :-) If you run a discharge cycle how many mah do you get out of that turnigy? Your .sig says your Trek extracycle can do 45 mph on 72v 10Ah LiPo?!?!? Whoa..... Yeah without a truck to draft behind it maxed out around 42mph assuming favorable conditions though :) That battery is no more ...
by nomad85
Jan 25 2012 10:10pm
Forum: E-Bike General Discussion
Topic: Upgrade time! 40mph max speed target. Help
Replies: 54
Views: 4718

Re: Upgrade time! 40mph max speed target. Help

it's not necessarily a tiny amount. ;) go watch justin's last video about hubmotors. :lol: link? a quick google search on my exact phrase "justin's last video about hubmotors" http://www.google.com/search?q=justin%27s+last+video+about+hubmotors finds it as the very first item. ;) (though google put...
by nomad85
Jan 25 2012 4:38pm
Forum: E-Bike General Discussion
Topic: Upgrade time! 40mph max speed target. Help
Replies: 54
Views: 4718

Re: Upgrade time! 40mph max speed target. Help

I know there's just about no way to 100% water proof these motors but I imagine there is a difference between the tiny amount of water that gets into my sealed motor vs having larger ventilation holes. it's not necessarily a tiny amount. ;) go watch justin's last video about hubmotors. :lol: link?
by nomad85
Jan 25 2012 1:18am
Forum: Battery Technology
Topic: Basic LiPo Charging
Replies: 74
Views: 15167

Re: Basic LiPo Charging

Nice photos :-)
If you run a discharge cycle how many mah do you get out of that turnigy?
by nomad85
Jan 24 2012 3:41pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Oatnet's x5403/Norco A-line, and Front-Mount battery stuff
Replies: 240
Views: 46636

Re: Cromotor vs 54xx - Fight!

Any good ideas on how to do a front battery mount on non triple crown suspension forks that don't involve welding/machining? Big zip ties? :)
Great job on your boxes oatnet!
by nomad85
Jan 24 2012 9:19am
Forum: Battery Technology
Topic: Why parallel packs?
Replies: 20
Views: 1233

Re: Why parallel packs?

Isn't the OP's question regarding what happens when 2 cells that are parralled the pack level and the balance taps have a large difference in voltage under load? I would be interested to know more as well, seems to me the balance wires would not be able to handle it and would vaporize like they do w...
by nomad85
Jan 23 2012 2:25pm
Forum: Items for Sale - New
Topic: Moped Rims and Wheels, 36 hole, 16" 17" 18" 19"
Replies: 175
Views: 39592

Re: Moped Rims and Wheels, 36 hole, 16" 17" 18" 19"

This is a great idea! Between this and finding a reliable hv charger I may have to dust my e-bike off. How much would a motor wheel build with a 19" rim and tire be (approx)
by nomad85
Jan 20 2012 8:47am
Forum: Battery Technology
Topic: EMC-2000 charger from ecity (1500 to 2000W)
Replies: 216
Views: 29266

Re: EMC-2000 charger from ecity (1500 to 2000W)

OMG these things look awesome. I had given up on e-bikes since I couldn’t find a reliable charger for my 84v lipo pack and destroyed it :( If only I had seen this! Maybe its time to resurrect my bike :mrgreen:
by nomad85
Aug 25 2011 9:41am
Forum: E-Bike Technical
Topic: Will stock 9C 2807 like being powered by 72V 40A controller?
Replies: 27
Views: 2494

Re: Will stock 9C 2807 like being powered by 72V 40A control

bobale wrote:Well I'm not sure about top speed, my bike is not that good, so for now I'm more interested in acceleration.
I wouldnt cut the shunt then.
by nomad85
Aug 25 2011 7:51am
Forum: E-Bike Technical
Topic: Will stock 9C 2807 like being powered by 72V 40A controller?
Replies: 27
Views: 2494

Re: Will stock 9C 2807 like being powered by 72V 40A control

Yeah but.. there is a point where you need higher amps to cruise.. Like at 36a, i could only go about 37mph on the flats. 72v ( 83V charged ) should have gone about 46mph. I probably needed about 50-60 amps or more to cruise at the speed that 72v can go. 36a x 82v = 2952w constant on the flats. Hmm...
by nomad85
Aug 24 2011 11:36pm
Forum: E-Bike Technical
Topic: Will stock 9C 2807 like being powered by 72V 40A controller?
Replies: 27
Views: 2494

Re: Will stock 9C 2807 like being powered by 72V 40A control

I would just keep the amps lower unless you prefer acceleration to top speed. More volts = more fun
by nomad85
Aug 24 2011 1:13pm
Forum: E-Bike Technical
Topic: Will stock 9C 2807 like being powered by 72V 40A controller?
Replies: 27
Views: 2494

Re: Will stock 9C 2807 like being powered by 72V 40A control

alot probably, I added alittle solder to my old 22 amp controller and it can pull 30 amps now. Best(easiest) way to test is with a watt meter on the battery while applying the brakes and WOT.
by nomad85
Aug 24 2011 10:51am
Forum: E-Bike Technical
Topic: Will stock 9C 2807 like being powered by 72V 40A controller?
Replies: 27
Views: 2494

Re: Will stock 9C 2807 like being powered by 72V 40A control

72v is not a problem, but I think 40A on an unmoded motor is unwise. I ran my 9c at 74v 30A with no mods and never had a problem. For months I regularly took 12 mile trips at 40+ mph most of the way. I only stopped becasue I messed up my batteries while charging them, the motor is fine..
by nomad85
Aug 23 2011 9:57am
Forum: E-Bike Build Threads / Photos & Video
Topic: Nine Continent 2806 Commuter Build
Replies: 8
Views: 2467

Re: Nine Continent 2806 Commuter Build

Your bike is very similar to my first ebike. I wouldnt worry to much about the parts getting stolen, I live in Indy and never had a problem and I had quick release lights on it, I was nervous about it though, like you I always carried my battery bag inside, bit of a chore but worth the peace of mind...
by nomad85
Aug 17 2011 2:37pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Philistine's Yuba Mundo Station Wagon
Replies: 54
Views: 12318

Re: Philistine's Yuba Mundo Station Wagon

Nice Grindz. I like it. Is that an Xtracyle? How do you find the front suspension effects handling? When I have both kids on the back, I find I have to hold control a lot on the front, and so I am wondering how front suspension would effect control when you have decent weight on the back? My bike i...
by nomad85
Aug 12 2011 1:56pm
Forum: Battery Technology
Topic: 12s2p LiPo pack kit including 12-channel BMS "Lite" Board
Replies: 168
Views: 28443

Re: 12s2p LiPo pack kit including 12-channel BMS "Lite" Boar

Would it be possible to use this with 5s packs instead, or can it only be a 12s 2p configuration. For my setup I would need 20s2p so 2 5s2p in series would work. 24s2p is to much for my controller.
by nomad85
Aug 25 2010 4:37pm
Forum: E-Bike Technical
Topic: Building the Best Controller
Replies: 340
Views: 40289

Re: Building the Best Controller

I would like to help. If i'm being honest most the comments in this thread are greek to me. I am computer savvy, and learn quickly, if there are any simple parts of the modules I could learn the basics and help out. I also have batteries and motors I don't mind subjecting to harm, so I could help wi...