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Laptop Powered E-Bike
#21
Im curious if you will have success with those glass fuses and not suffer voltage drop across them under full load of the motor.  I have the Bafang BBSHD which is supposed to limit to a 30A draw unless I modify it but Im still on the fence to fuse each cell or not due to fear of the voltage drop.
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#22
the voltage drop across the glass fuse would negligible.
Proceed with caution. Knowledge is Power! Literally! Cool 
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#23
I'm enjoying this thread as I'm working on a very similar project.  I've essentially built a 14s8p pack but configured it as 2- 7s8p packs in series from recovered laptop cells.  I tested all my cells to 2200mah+ plus but obviously didn't spend enough time considering resistance or c rating as I'm not getting the power from the pack and it warms up considerably after a bit.  This was version 1.0 and I'm learning as I go.
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#24
Well, I finally saved up enough money to buy the motor... and then spent it on an ultralight backpacking tent instead. I really need the tent though. I think if I'm going to get this project done, I'm gonna have to settle for a cheaper motor:
https://www.ebay.com/itm/1000W-48V-Direc...2404428608

Maybe you all might know of a better deal? I'm looking for a 26" front wheel direct drive motor. Ideally, 500W, 48V. No hurry though. It'll be another couple months of saving before I can try again. Gotta have priorities though. Smile
-Mike G
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#25
Not really related to batteries ,but what tent did you get? My MSR Thunder Ridge has treated me well through the years ,although a bit on the heavier side.
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#26
I bought a Nemo Hornet 2p. Half the weight of my old REI tent, which is a great tent. I've discovered though, that if I want to keep hiking, I've got to get my pack weight down.
-Mike G
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#27
Hallo, ich habe auch ein E-Bike gebaut. Es fährt mit 80 Laptopzellen. Gesamt 600Wh. Ich habe auch darüber gebloggt? Ist der Link von Interesse?

[diy] emanhs [/ diy]

[diy] frpwoq [/ diy]

[diy] jezhhv [/ diy]

Entschuldigung, ich habe Probleme beim Hochladen der Bilder.



[diy] ogdope [/ diy] [diy] pyfgvu [/ diy] [diy] arqadv [/ diy]

Ich kann keine Bilder hochladen ... Wie auch immer, hier ist der Link: http://pauls-werkstatt.blogspot.com/2018/10/ebike.html
rebelrider.mike likes this post
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#28
(11-23-2018, 05:24 PM)Paul Wrote: Ich kann keine Bilder hochladen ... Wie auch immer, hier ist der Link: http://pauls-werkstatt.blogspot.com/2018/10/ebike.html

You can't upload any pictures because it is your first post. You should be able to go back and edit the post and re-add the images now, tho. You will have to do a full edit and remove the previous [ diy ] flags.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at https://discord.gg/c7gJ5uA
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#29
Thanks paul. I was able to read your writ-up from the link in your signature.

I'm switching gears (no pun intended) and I've been looking into car alternators or starter motors as the motor for my ebike. Or maybe an old washing machine motor. Each would have it's technical challenges, but they'd all be way cheaper than any hub motor I could find. It is fun to work through technical challenges, but I wonder if the bike will work as well as it would with bolt-on parts.

I'll have to re-think the battery too. It will have to be made to accommodate whatever motor I end up using. Maybe I'll see if I can get some of alarmhookup's modem backup batteries. They may be able to tolerate a higher current than laptop cells. I'd have to change the title of the thread if I did that though, LOL.
-Mike G
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