Search found 953 matches

by EVTodd
Jun 22 2016 7:56pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

What Ypedal said is probably the case. I had the same issue recently with positive most cell hitting full charge while others were much lower, BMS is ~$25 and about 25+ days of shipping... I'd bet the cells are just fine though. Got a hobby charger to test and balance with? I thought the seller of ...
by EVTodd
Jun 19 2016 8:37pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

could be a number of things, but my best guess is a weak cell in that highest voltage group, less capacity means it hits 3.0v first, and also 4.20 first... bench test will confirm .. If.. " IF " you are lucky and the other groups hit 3.0v first, then it's a balancing issue and easily corrected . .....
by EVTodd
Jun 19 2016 8:21pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

the highest voltage group is likely hitting 4.20v first and causing the bms to shut down before the other groups get to full, plug in the charger and test the groups while the charger is working to confirm. I will discharge the battery a bit and try that out. I'm sure that's exactly what's happenin...
by EVTodd
Jun 19 2016 8:05pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

I don't see a problem with the connections. One wire goes to the top of cell group 10, and the other goes to the bottom, yes. The bottom of group 10 is also the top of group 9. So you have a wire on the top of 10 and a wire on the top of 9. Which is the bottom of 10. Yes? lots of 4s and a 4.1 looks...
by EVTodd
Jun 19 2016 3:39pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

Ok guys. After trying again to ship the battery back with UPS and Fedex both telling me I can't ship it I decided to crack the case open and take a look inside. The first thing I noticed is that it has Samsung cells. I had just purchase another pack and had that confused. Anyway... I measured each b...
by EVTodd
May 24 2016 9:36pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

Welp. It looks like I might be testing some stuff to figure it out myself now. I attempted to ship this via UPS then Fedex figuring I would be honest and say what the contents were and maybe pay an extra hazardous fee or something. No go. They both said it was too big of a lithium battery to ship. I...
by EVTodd
May 22 2016 12:56pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

I hear ya. Actually it does make sense to plug it into the wall first. Really though. That should be something that really doesn't matter. They can't expect a regular consumer to even think about that when they're plugging it in. I really didn't mean for the thread to turn into a discussion on how t...
by EVTodd
May 21 2016 8:35pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

I've got a similar pack and I always plug the charger into the wall, then charger lead into battery. That way there is zero spark. I wonder if with all this sparking on the connections, that you've tarnished the contacts and created a poor connection. Try cleaning both the charger output plug and b...
by EVTodd
May 21 2016 2:12pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Re: Thoughts on possible bad "shark" pack

999zip999 wrote:Check charger for 42 volt. Pack charge should 41.5 volt about. What did you get it.
Charger seems to be putting out the correct voltage. I believe I got it in late February. Seller said it had just been built with fresh cells. He's actually being very helpful so we'll see how it goes.
by EVTodd
May 19 2016 7:38pm
Forum: Battery Technology
Topic: Thoughts on possible bad "shark" pack
Replies: 30
Views: 2577

Thoughts on possible bad "shark" pack

I decided it might be a good idea to switch my wife's bike's battery pack over to something a little easier for her to take care of herself. We've been using lipo for several years without issue but I wanted something she could just plug in when she's done with the bike without having me do it (the ...
by EVTodd
May 11 2016 7:10pm
Forum: E-Bike General Discussion
Topic: Need some help identifying seat-stay holes ..
Replies: 5
Views: 651

Re: Need some help identifying seat-stay holes ..

Hey Guys...finally was able to solve the puzzle. Thanks to a facebook friend, RJ the Bike Guy. He sure seems to be an encyclopedia for bikes. I believe these are called removable v-brake bosses, and the specs seem to be the following. I will give KHS a call and see if they can help me out with thes...
by EVTodd
May 08 2016 11:16am
Forum: E-Bike General Discussion
Topic: iZip Mountain Trailz Enlightened Hub?
Replies: 7
Views: 860

Re: iZip Mountain Trailz Enlightened Hub?

Damn! It looks like this hub is designed for 150mm frame spacing. $50 paperweight before I even got it hooked up! lol Oh well, ya win some and lose some I guess. It's odd the Currie would go with weird spacing like that. What's the point of that with this small of a hub motor? Currie isn't worried ...
by EVTodd
May 07 2016 7:00pm
Forum: E-Bike General Discussion
Topic: iZip Mountain Trailz Enlightened Hub?
Replies: 7
Views: 860

Re: iZip Mountain Trailz Enlightened Hub?

Damn! It looks like this hub is designed for 150mm frame spacing. $50 paperweight before I even got it hooked up! lol Oh well, ya win some and lose some I guess. It's odd the Currie would go with weird spacing like that. What's the point of that with this small of a hub motor?
by EVTodd
May 05 2016 6:40pm
Forum: E-Bike General Discussion
Topic: iZip Mountain Trailz Enlightened Hub?
Replies: 7
Views: 860

Re: iZip Mountain Trailz Enlightened Hub?

Huh. I'm surprised there isn't more info out there about these bikes. I can't find a single reference here or anywhere on the internet about what brand of motor it is. I would try to crack it open and have a look inside but to my surprise it has a cassette instead of a freewheel so I'll need to get ...
by EVTodd
May 04 2016 6:23pm
Forum: E-Bike General Discussion
Topic: iZip Mountain Trailz Enlightened Hub?
Replies: 7
Views: 860

Re: iZip Mountain Trailz Enlightened Hub?

Does anyone know what brand of motor Currie used on their iZip Mountain Trailz Enlightened model?
by EVTodd
May 03 2016 8:22pm
Forum: E-Bike General Discussion
Topic: iZip Mountain Trailz Enlightened Hub?
Replies: 7
Views: 860

iZip Mountain Trailz Enlightened Hub?

currie hub.jpg
currie hub.jpg (173.48 KiB) Viewed 406 times
Anyone know the specs on this motor or who made it for Currie? I believe it was used on their iZip Mountain Trailz Enlightened model at 24 volts. I'm curious if it could handle 36 volts 350 watts or so.
by EVTodd
Apr 09 2016 9:50am
Forum: E-Bike Build Threads / Photos & Video
Topic: TypeThree's Simple retro-mod 80's mtb to e-commuter
Replies: 5
Views: 1123

Re: TypeThree's Simple retro-mod 80's mtb to e-commuter

Just stumbled across this. Nice build! I can't believe I'm the first person to comment on it. I love the brake setup. I recently built a very similar bike with the first mountain bike I ever owned. Mine is a 1989-19990 Blue Max. It's a bike I had hanging on my wall for years. Slapped a cheap geared ...
by EVTodd
Apr 04 2016 9:19pm
Forum: Battery Technology
Topic: Discharging lipo to zero volts
Replies: 9
Views: 545

Re: Discharging lipo to zero volts

Throw them in a bucket with salt water and then recycle. Will saltwater get rid of the puffing? I've already discharged them down to zero volts. No. It will completely destroy any power in them. In theory. I'm pretty sure discharging to zero volts is more reliable. Like I said though, I already dis...
by EVTodd
Apr 03 2016 7:25pm
Forum: Battery Technology
Topic: Discharging lipo to zero volts
Replies: 9
Views: 545

Re: Discharging lipo to zero volts

jokr wrote:Throw them in a bucket with salt water and then recycle.
Will saltwater get rid of the puffing? I've already discharged them down to zero volts.
by EVTodd
Apr 03 2016 1:43pm
Forum: Battery Technology
Topic: Discharging lipo to zero volts
Replies: 9
Views: 545

Discharging lipo to zero volts

I decided to get rid of a couple of old lipo packs I have sitting around so I discharged them to zero volts. One of them (a 6s pack) puffed like crazy. Should I try to get the gas out of them before taking them in to my local recycling center?
by EVTodd
Dec 05 2015 10:24pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Johammer Electric Motocycle
Replies: 26
Views: 8648

Re: =>Awesome new Electric motorcycle - JOHAMMER...

I dunno. I'm pretty open minded about different designs but that kind of looks like a garbage can on wheels to me. :D
by EVTodd
Nov 02 2015 9:36pm
Forum: E-Bike Non-hub Motor Drives
Topic: bosch classic ebike plastic gear
Replies: 28
Views: 10410

Re: bosch classic ebike plastic gear

I really hope you figure out how to get it going again. After all my complaining about the prices of Bosch powered Haibikes I've come around and have been considering getting one. This thread scares me though. If I plunk down that kind of cash I expect to be able to get replacement parts. Heck, I ca...
by EVTodd
Nov 01 2015 12:31am
Forum: Electric Watercraft
Topic: Another trolling motor project. Need controller advice.
Replies: 7
Views: 3341

Re: Another trolling motor project. Need controller advice.

I am trying to understand why your going through your batteries in less then a year ? Not knowing what battery your using and how much you draw it down it's not possible to understand the problem..... As far as a PWM controller I have the Minn Kota 45 Endura max which has a PWM controller in it alr...
by EVTodd
Oct 26 2015 1:01pm
Forum: E-Bike Reviews & Testing
Topic: 2016 Haibikes are looking gooood
Replies: 20
Views: 3973

Re: 2016 Haibikes are looking gooood

There is a big gap in the performance of a real ICE dirt bike and a light weight low powered e-bike. Tons of possibilities for the vast areas in between the two extremes. Thinking we should be locked into some stale Idea of what is correct in terms of speed/ power / weight is just plain obnoxious t...
by EVTodd
Oct 26 2015 9:53am
Forum: E-Bike Reviews & Testing
Topic: 2016 Haibikes are looking gooood
Replies: 20
Views: 3973

Re: 2016 Haibikes are looking gooood

Around here, (USA), it's less mixing with non ebikes on paths and more dodging cars, and maintaining 25 to 30mph is nice for keeping in a space between cars instead of constantly being passed. The car-dooring risk goes up of course... You need a motorcycle or scooter then. I almost can't believe I ...