Man of Honour
Punctures on all my bikes were solved with Continental Gatorskin tyres
Electric Bike Conversion Kit or Electric Bike?
- Thread starter zYx
- Start date
Punctures on all my bikes were solved with Continental Gatorskin tyres
Deleted member 66701
D
Deleted member 66701
Now I have a bike(took long enough butt happy with it) looking in to this again.
Going to try and get some job lot untested battery packs on ebay this week and tear them apart.
Want to keep this as cheap as possible, so was looking at some of the Chinese kits. Has anyone got this or give some advice, I really want pedal assist rather than just throttle.
Was looking at this one http://www.ebay.co.uk/itm/161965218941?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Also what sort of range you talking about in say 10ah battery pack?
Or if I wanted 30mile range what ah would I realistically need (not that I'm suggesting 10ah would be enough).
Also whats a good BMS to get?
Going to try and get some job lot untested battery packs on ebay this week and tear them apart.
Want to keep this as cheap as possible, so was looking at some of the Chinese kits. Has anyone got this or give some advice, I really want pedal assist rather than just throttle.
Was looking at this one http://www.ebay.co.uk/itm/161965218941?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Also what sort of range you talking about in say 10ah battery pack?
Or if I wanted 30mile range what ah would I realistically need (not that I'm suggesting 10ah would be enough).
Also whats a good BMS to get?
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Man of Honour
You multiply the Volts by the ah so my batteries would be 36 x 9 = 324.
It is then reckoned that on average you use 20 something or other a mile so you divide that into the 324 = 16.2 miles.
I would say that isn't far off for my batteries.
A 36v 17Ah battery should get you 30 miles.
36 x 17 / 20 = 30.6 miles.
Man of Honour
You're over my head now
Amigafan is your man or join up to Pedelecs Forum where AmigaFan spends a lot of time.
Man of Honour
I don't but I've been waiting over 3 years for a motorist to say "You shouldn't be on the road because you don't pay insurance" instead I still get the Road Tax one.
Well got a bunch of battery coming.
And after posting in the forum you recommended.
Going to use these guys and it's a bargain. Even cheaper than the ebay link I posted.
http://www.electricbikeconversions.co.uk/
And after posting in the forum you recommended.
Going to use these guys and it's a bargain. Even cheaper than the ebay link I posted.
http://www.electricbikeconversions.co.uk/
Man of Honour
Naughty naughty.
I wonder if my local shop knows about them - http://www.electric-bike-conversions.co.uk/
Can hardly say anything when they haven't got an original name.
Also site I posted that's their actual ltd name
Don't see what's naughty, other than slightly dubious non road legal kit, but they do mention that in descriptions.
Also site I posted that's their actual ltd name
Don't see what's naughty, other than slightly dubious non road legal kit, but they do mention that in descriptions.
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Batteries finally arrived almost a week late, the first ones are looking good, officially 2200mah, but voltages all fine and already taken 1500mah and only 4.03v so expect they'll be more like 2500mah. Got 36 of those batteries
And then 24batteries which are officially 3000mah but haven't tested any of them yet, going to take weeks to test them all, and will need to buy another bulk lot, depending what the average mah is, will need between 70-100 batteries.
Ordered the 18650 clips, as well cardboard ring insulators for the end and new shrink wrap as damaged some of the shrink wrap getting them out, however due to china, all that's less than £15 inch postage.
So the clips hold them together like this
Thing I'm going to get a rear bike rack to attach battery onto.
Trying to decide if I should go fused or none fused. Going respectable fuses means they would trip out if it ever tries to pull more than 2 or 2.5amp from each cell. Depending what rating I got.
And then 24batteries which are officially 3000mah but haven't tested any of them yet, going to take weeks to test them all, and will need to buy another bulk lot, depending what the average mah is, will need between 70-100 batteries.
Ordered the 18650 clips, as well cardboard ring insulators for the end and new shrink wrap as damaged some of the shrink wrap getting them out, however due to china, all that's less than £15 inch postage.
So the clips hold them together like this
Thing I'm going to get a rear bike rack to attach battery onto.
Trying to decide if I should go fused or none fused. Going respectable fuses means they would trip out if it ever tries to pull more than 2 or 2.5amp from each cell. Depending what rating I got.
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Man of Honour
In total how big will your battery be?
36v 20Ah which should be between 70-100cells
If I want to spend more money can make it look more professional. Adds a lot of cost though.
http://www.aliexpress.com/item/Rear..._3&btsid=4b43ada5-4798-4883-9f08-a06fd570d3ce
That fits upto 128cells
Well this has solved the fuse question. Nice neat and less joints the better. 2m for £8
Still can't find a nice BMS though. They're all cheap and charge only, no BMS on discharge.
Edit - only 1 out of 12 batteries is dead so far, all the others have good voltages and all around 2100mah +/- 100mah, so the "3000mah" have lost a lot or were never that to begin with. However it works out well, as it's all very balanced so far which is better for the battery pack.
If I want to spend more money can make it look more professional. Adds a lot of cost though.
http://www.aliexpress.com/item/Rear..._3&btsid=4b43ada5-4798-4883-9f08-a06fd570d3ce
That fits upto 128cells
Well this has solved the fuse question. Nice neat and less joints the better. 2m for £8
Still can't find a nice BMS though. They're all cheap and charge only, no BMS on discharge.
Edit - only 1 out of 12 batteries is dead so far, all the others have good voltages and all around 2100mah +/- 100mah, so the "3000mah" have lost a lot or were never that to begin with. However it works out well, as it's all very balanced so far which is better for the battery pack.
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Quick update, now got 32 batteries tested and selected @~2200mah. And a further 2 which are fully dead and 8 that are between 1600-2000 which I won't use as they're a bit low. Want the batteries as matched as reasonably possible. A second lot of laptop batteries came, which I'm hopping should give me more than the 100 I need.
The cardboard insulators and new shrink wrap also arrived. Also got a package at the postoffice, not sure if its the clips or zinc. I hope clips. Then I can store the batteries slightly better and safer.
Wish I had more testers, slow going only being able to test 4 batteries at a time and it takes about 16hrs.
The cardboard insulators and new shrink wrap also arrived. Also got a package at the postoffice, not sure if its the clips or zinc. I hope clips. Then I can store the batteries slightly better and safer.
Wish I had more testers, slow going only being able to test 4 batteries at a time and it takes about 16hrs.
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Man of Honour
Where are these batteries coming from? I've heard horror stories about cheap imported batteries used with bike lights - and that's only one or two cells.
Mainly dell laptop batteries. Panasonics and Samsung cells mainly.
Pink ones are panasonic, green Samsung and blue are LG
Man of Honour
Fair enough. I'd still be extremely paranoid about heat when charging them especially.
Man of Honour
Assuming that the batteries are actually the brand/model they claim, yes.
On top of that, you're cramming a lot more of them together than normal so the resultant heat build up is going to be higher.
I'm saying "zomgz, they're going to explode" but just to be careful.