pdarnett

Not got to spot welding yet! Update on the battery, got my charger and following Dave's advice slowly upped the cell count to 6S and managed to get it charged up to that ok (22.2v in about 10 minutes). Cells are still unbalanced after leaving for a bit, so on the Life setting (3.3.v) doing the cells individually then will do a full Lipo charge on each cell. As its stands Cell1: 2.2v Cell2: 1.8v Cell3: 2.4v Cell4: 2.56v Cell5: 2.18v Cell6: 2.8v Cell7: 2.14v Cell8: 2.88v Cell9: 2.3v Cell10: 2.4v So a bit better than 0.5v a cell, so I'm going to let it sit overnight then repeat etc etc etc..... The other pack with the 0v cell is a scrapper, so I may do some testing on it (maybe salvage some cells for the other one) and use the BMS and the case for some 18650 cells I seem to have a lot of!

I hope so! Ask me in a week when I'm bandaging my fingers!

They are Li-on, don't worry I'm uber careful. just building a new workshop with fireproof worktops(up to 600c), extinguishers and sand filled fire buckets as well as individual power breakers for each socket. I'm quite new to using lithium so I'm being extra cautious, just got my IR thermometers in the post this morning as well!

Asked Andrew, their's is about £40, the momentum one is £35 so may as well have the one designed for the pack. But I'm going to see if I put some charge on it first!

Thanks Dave I was thinking along the same lines, I was going to get a 6S balance lead and some recycle a jumper strip off some old server boards, so very similar. If the BMS comes back to life after the initial cahrge I'll probably order the charger from Momentum (the pack producers) to see if it charges normally. I'll document the process for anyone interested!

No components on top, they're just to connect the cells together. No real markings on the cells but the pack is a 36v 9ah one so I'm guessing they're 3.7v 9ah pouches as they're in a 10s1P config. Ordered my Imax yesterday so will give charging a try. Shame my workbenches for the new workshop were completely trashed by Parcel Force yesterday, they managed to completely fold in half inch-thick mdf work tops!

[ATTACH]7635.vB[/ATTACH][ATTACH]7636.vB[/ATTACH] Here's a couple more pictures, not sure if it'll help. I haven't bought an Imax yet, next on my shopping list but seems that its the best budget charger. Busy building a workshop with all the proper fire precautions as well! BTW at the discharge end, as well as the main thick red and black leads, there a pair of thinner red and black ones that are connected to the bms board. Any idea?

I may try that, I've got some charged 18650 cells kicking about, i may knock up some leads just to give each cell a tickle one at once. If I can bring the whole pack up to say 20v then I beleive the BMS should allow me to charge properly. If not I bought some nice cases and BMS boards for my 18650's!!

Some pictures from the phone. [ATTACH]7633.vB[/ATTACH][ATTACH]7634.vB[/ATTACH]

Doh, cheers Dave!

So, bought a couple of batteries off Ebay, faulty, marked as do not charge. They're 36v 9Ah ones designed for Momentum bikes. Out of the box they read about 4V, so out with the screw driver and in bits to investigate. BMS looks undamaged and measuring via the balance leads each cell is about 0.5V. I'm thinking they've been left to self discharge on a shelf for a few years through the BMS. One pack has a 0v cell, so that might be a duff. They're prismatic cells in a 10s1P configuration as far as I can see, I'm hoping I can breathe some life into them. They look brand new, never been opened(till I got there!). Is it worth me buying an Imax B6 and seeing if I can trickle a bit of charge into each cell one at a time via the balance leads? Hopefully the BMS will come back to life at some point and then I can buy the proper pack charger and revive them. Dave might know a bit about these packs, I'll grab some pictures......

If Wes doesn't take you up I'll have one if the January special price is good!

Many thanks to Dave for sorting me a controller out in record time, plus some great advice on the way! I promise I'll post pictures of the conversion when I'm done sourcing batteries!

I'm in Bradford BD7

Any controllers left? I know this is an old thread.......

Cheers for that Dave, I bought the wheel from one of the members on here, I'm currently on a 500w dd Chinese thing. Just wanted to swap it out for a geared one to do some testing.

Sorry to go a little off topic, can someone at cyclotricity tell me the max current for the motor please, just wanted to try one of their wheels on my bike and don't want to fry it on my controller. I'll lower the shunt on my controller if needed.

D8veh nice suggestion, I have to have a look at how much clearance is underneath, but that sounds doable. I think they may have a welding bloke on the staff so fabricating some mounts shouldn't be too much of an issue. Shame the trailer bit doesn't have regular wheels or it'd get the two powacycle wheels on it they've got already! On my other suggestion was to remove the recumbent front end and have a regular bike pulling the trailer?

I don't think that speed limit would be an issue, they just need some torque to get up hills and the campus is pretty hilly. I'm seeing some issues with the wheels if we want to go hub motor (which they have some old powacycle ones) unless they do some welding to provide support for both sides of the axle. maybe the back wheels with two controllers and somehow get them balanced on one throttle. That's probably where advice is needed!

Damn, that's a shame. Not even maybe a "pusher" trailer? i.e. not something that's permanently fixed to the bike?

My local bike recycling charity have asked for some advice regarding converting a cargo recumbent bike to electric to enable them to carry bikes to the local college campus where normal vehicles aren't permitted. The bike is this one http://www.bikeweb.org.uk/artbitz/adam_hart_davis1.jpg donated by their patron Adam Hart Davis. Needless to say, as a non profit organisation, they have very little money to spend, but they do have access to lots of bike bits, including a few junked powacycles I noticed in their workshop, so wondering if anything can be reused. Any idea appreciated, I said I'd ask the "cloud" for suggestions! They're a great little organisation, taking scrap bikes and refurbishing them to sell at very low cost (Usually £25 for a fully working bike) to students and low income families etc. I took them 3 incomplete bikes this weekend that would have usually ended up on the tip and they'll be back on the road next week with some new owners. So have a look at the picture (best one I could find I'm afraid) and see what you think, they only want about a 5 mile range but some hillclimbing assist. Probably SLA, battery wise, as they've got some powacycle packs.

I'm interested, but would want it shipped up to me in bradford, could you PM me so we can work out a price with shipping? Paul.

Nice bike you've got there! May see you at the next bike breakfast? I'm sat in my office on Manchester Road.

Hi all, I'm Paul from Bradford, currently I run an old Ezee Sprint I rescued from my local bike shop's loft and am currently trying to convert a new MTB for my daily commute. Ex electronics engineer so not averse to getting the soldering iron out. On the lookout for a 26" front hub motor wheel if anythings kicking about!