Recent content by 67spyder

so far I have always used BMS from Paul at emissions-free.com, would drawing more than the rated current damage the BMS or would it just limit the current to 60A or whatever it is rated at? OR is this a question for Paul?

Has anyone used a BMS in converting one of these? I have a yardworks (cheap crap) that I bought for $25 with dead SLA batteries. I happened to have a pair of the exact batteries laying around from rebuilding UPS's so I put them in but that was 4 years ago and I expect these will be toast soon...

You are correct, I connected the strings of cells on the ends which is less than ideal but this is a stock controller and does not pull huge amps. I made the decision to go with ease of building and put the connections at the pack end. The speed is pretty much stock 35kph as I didn't change...

How are you making out with building a pack from these cells? I just started a thread (before I found this one) about cutting up the battery from a hybrid GMC truck. The local insurance salvage has one with a reserve bid of $400 CDN (not far from 150 pounds you paid). I am looking at doing an...

The local insurance salvage has the battery pack from a 2010 GMC dual mode hybrid. I have found very little about this other than it is 300V NiMh battery and apparently weighs in at about 300Lbs. The reserve is $400 and the auction closes wed am. if nobody bids, then they will lower the...

I took a couple more shots. In this first one you can see the whole pack. The top and bottoms and the sides of the pair in the middle have rubber pads on them that I get from the bottoms of the small 5 cell Makita battery packs. After approx 10% DOD the cells are still pretty much in balance...

So maybe a strip of duct tape in between each parallel string of cells?

Forgot to mention, BMS and charger ordered from Paul last week

You are right, the 32ah capacity just barely eclipsed the fact that they are pink! I went with 12p config because the C rate is so low with the laptop chemistry and there are six cells in each laptop battery. Some shots of the jig. A string of cells ready to be soldered The tabs folded...

I recently built a 12p14s pack for my wifes e-bike. I had the good fortune to obtain a box (~60) of brand new laptop batteries, so I cut up 28 of them and built a pack. I took pictures of the project and the results. Is this the place to post or is there a better thread? Just a picture of...

Ordered the direct drive kit from Cell_man a couple of days ago, with the 12 fet infineon controller. Patiently waiting now while getting ready to build the battery box.

I bet some of the controller guru's here could modify a controller to use a hub motor as a generator to simulate pedaling load! I know, I know, we build electric bikes so we don't have to pedal in real life so why pedal in virtual space.

You could get studded tires and do battle on icey streets or you could do this: http://www.instructables.com/id/Google-Bike/ But if you tell your boss that you rode to work virtual space he might offer to pay you with virtual money :wink:

This is a wonderfull bike! I wish I could have found a Stinky myself but here in the flat prairies I felt I was lucky to find my used Scrap (Scrap-E) Seriously, looking forward to a video post both to see your bike in action but also to see some not -30 weather :wink:

As I mentioned the cells that I stacked in the mockup are garbage cells that have zero charge and were just used for mockup because there is no danger from shorting them out. The cells I have for the actual pack are Konion US18650VT that have been charged to a storage charge of 60% which is...