Project Electric (Push) Bike - Now With Video

[Aff]

[Pol Anorl]

This thread is lacking updates.
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GOOD GAME BODYGUARD: https://i.imgur.com/8WePGgf.jpg
20:30:37 Pyro.: I don't sort of like men, I take every advantage to choke on dick.
Jewlio Iglesias: You live in Liverpool - Chances are, the front door has already been kicked off the hinges

[Aff]

[Pol Anorl]

Feel free to donate the whole project so far to me and I will finish it off, ive been waiting on updates forever!
____________________
GOOD GAME BODYGUARD: https://i.imgur.com/8WePGgf.jpg
20:30:37 Pyro.: I don't sort of like men, I take every advantage to choke on dick.
Jewlio Iglesias: You live in Liverpool - Chances are, the front door has already been kicked off the hinges

[Aff]

Had absolutely no time at all to work on this, if I'm lucky I might get a bit done this evening, otherwise next weekend should be a go.
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Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[Nb]

Thats some serious diy shit there, i had an electric bike for a year with a rear 350w hub motor and i passed every one else on the redway where i live. Sold it after a year as the battery needed replacing and at the time i couldnt afford to replace it.
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Cbr1100xx blackbird gone, mk4 golf gt tdi chav now
Colin1 wrote 'Im grateful for what i can get, which isnt all that much.'
Columbus travel insurance are crap!! Do not use!

[Pol Anorl]

get a move on then, petrol will be an exhausted resource soom
____________________
GOOD GAME BODYGUARD: https://i.imgur.com/8WePGgf.jpg
20:30:37 Pyro.: I don't sort of like men, I take every advantage to choke on dick.
Jewlio Iglesias: You live in Liverpool - Chances are, the front door has already been kicked off the hinges

[Pol Anorl]

Can I have this yet?
____________________
GOOD GAME BODYGUARD: https://i.imgur.com/8WePGgf.jpg
20:30:37 Pyro.: I don't sort of like men, I take every advantage to choke on dick.
Jewlio Iglesias: You live in Liverpool - Chances are, the front door has already been kicked off the hinges

[SQL]

Op's Battery Bombs blew it up

[G]

1500w is enough for a reasonable bit of speed. Certainly for a push bike.

We're talking probably similar to a lot of cheap 50cc 4 strokes as far as 'go' goes - a bit less weight and more available able torque.

[Pol Anorl]

[bezzabsa]

ran out of 50p's for the meter





for our older posters

[Aff]

OK semi-update.

I hooked up all the stuff today, with the new working throttle.

Nice bit of fake plastic chrome to bling the bike up too.

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0420_zps285a44b6.jpg

It span up fine which is a bonus.

However I'm going to have to buy some more batteries. I have more dead cells which are killing them off, I will need to find a better way of testing them before I build each pack. This new charger can measure internal resistance, but I think I'm going to charge every single one in parallel, then leave them for a week and measure the voltage, then I will throw out all the dead ones and build another pack.
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Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[bladerunner]

Maybe an on load discharge test before you build the packs?
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[Aff]

[Pete.]

The problem is, you're not going to have good cells and bad cells - you're going to have cells in various grades of degradation. How are you going to determine that?
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Aff]

[Pete.]

Isn't there some problem where cells of reduced-capacity get reverse-charged by the better cells when you run the battery very low though?
I read this cited as the reason why DeWalt batteries suddenly die off, caused by running the drill down dead flat. I had killed off a couple of batteries before reading that and have been careful not to run it dead flat ever since and I haven't lost a battery since then.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Aff]

[bladerunner]

Indeed you have a lot of cells to deal with! But matched cells will give better results I guess at the expense of rebuilding and testing the cells. I used to do a bit of battery pack building when I raced 1/10 scale rc cars many years ago! Deffo takes a bit of skill to solder them up without damaging the cells when pulling lots of amps!
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[bladerunner]

Indeed you have a lot of cells to deal with! But matched cells will give better results I guess at the expense of rebuilding and testing the cells. I used to do a bit of battery pack building when I raced 1/10 scale rc cars many years ago! Deffo takes a bit of skill to solder them up without damaging the cells when pulling lots of amps!
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[Aff]

OK some progress today.

The extra batteries that I ordered arrived:

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0425_zpsca92001c.jpg

Stripped them down again, I am much better at this now,
took about 15mins and only stabbed myself 5 times.

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0426_zps4d373046.jpg

The started wiring together all the cells in parallel. As you can see I'm changing up my connection method. On the positive end of the cell I'm going to join them in the centre of their original connecting tab. I'm doing this because I have suspicions that I may have killed a few cells last time by getting solder spatter in the small gap between the positive and negative terminals.

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0427_zpsa617fcc0.jpg

I was making good progress, got the first lot of 24 cells wired up, was about to finish the second lot of 24 and then this happened:

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0428_zpsf55fdea2.jpg

I scrounged around and found just enough solder to finish the second pack of 24 cells and this happened:

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0429_zps85eb57d0.jpg



So I will have to buy some more supplies.

In the mean time I can charge up the pack I finished.

Don't think I have shown the fancy charger I bought from 'Murica yet. The old one had a pathetic 50W charge limit. This one however has a 1000W limit.

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0430_zps6e545c35.jpg

It also has loads of fancy features. Including a USB interface and software so I can set my own really complicated charge cycles.

It can also spit out tons of graphs which I can nerd over. Here are a couple I collected quickly for the single cell 50Ah pack I'm charging ATM:

https://i1135.photobucket.com/albums/m637/Biles/EBike/GRAPH1_zps0b2d1162.png

https://i1135.photobucket.com/albums/m637/Biles/EBike/GRAPH2_zps7cf827cd.png

https://i1135.photobucket.com/albums/m637/Biles/EBike/GRAPH3_zps6dbe7bf9.png

I think that last one shows just how shit my £15 PSU is. I think I might buy a couple of second hand 1000W Server rack PSU's instead.
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Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[Aff]

OK so I taped the soldering iron back together long enough to finish the second pack.

I then cut apart the charged pack

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0431_zpsfe3c9212.jpg

And put them in a box

https://i1135.photobucket.com/albums/m637/Biles/EBike/IMG_0432_zps2eae0019.jpg

I will add the rest when they finish charging.

I will then be leaving them for a week or 2 and see how much voltage they have all lost, any that are below ~ 3.8V will be thrown out.
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Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[G]

Are you working out the sort of price you're paying per usable ah/wh?

[Aff]