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A gaming and technology blog by TWHL admins Penguinboy and Ant. A music blog by TWHL users Ant and Hugh.

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avatar Captain Terror 20th October 2014, 19:30 PM

This guy has inspired me to try and start making my own Lithium-Ion Battery packs :)
Here is the video I first watched to get inerested in it :)

I might invest in a used terminal welder, just becuase soldering cells scares the shit out of me.. ='(

Also a big plus, I get an unlimited amount of cells to play with due to failed battery packs at work; we throw them out, and normally when they fail, only 1-2 cells out of the pack(out of 8) are actually bad.


avatar Stojke says: 20th October 2014, 21:29 PM
Its fairly simple to connect two cells, just practice a little.
The only down is that if you overheat it, which wont happen due to its thermal capacity (Only if you use an 100W iron or something), it can explode.

Used cells have decreased capacity.
Other than that, I don't see why you shouldn't make an battery powered bicycle :)
avatar TJB says: 20th October 2014, 22:57 PM
If you set the bike up with a super duper high voltage battery, and you set the wiring up to shock your leg muscles right, you wouldn't even need to put on a motor!
avatar DiscoStu says: 21st October 2014, 01:17 AM
Ha! Curiously I've been thinking of making a dual battery for my cell phone. But then I'd have to 3D print a new back cover, because it normally only has room for 1 battery :P
avatar Captain Terror says: 21st October 2014, 03:14 AM
That's an awesome idea Stu, do you have a thing maker yourself?

Stojkens: OK thanks. it makes sense, I know by using the batteries a lot, they get REALLY hot if you are cutting/drilling through metal.. Is there any particular type of solder iron you'd recommend for the best results?

TJB: That's a fucking good idea! :P
avatar DiscoStu says: 21st October 2014, 05:00 AM
I don't have a thing maker, that's one of the main reasons I haven't really thought of it seriously. 3D print as a service is a bit expensive.
avatar Striker says: 21st October 2014, 07:34 AM
I will check this out later, I'm at work now. If it's interesting perhaps I will invest some money in buying a couple of cells from or some site that sells them cheaply.
avatar Stojke says: 21st October 2014, 10:01 AM
When you pull a lot of current from the battery it can heat up, same goes for charging.
Use solder that has flux inside of it so it attaches to the metal easily, also use clean solder (don't buy dirty crap from 3rd person sellers) it is not expensive and you don't need more than 100g , 2mm diameter (darn TWHL not supporting unicode for diameter symbol >:( ).

Make sure there are no short circuits with the frame of the bicycle.
avatar Captain Terror says: 21st October 2014, 21:16 PM
Awesome Stojke, thanky for the great tips! =PP

Striker: Nice, we can trade our failure stories back and forth ;)

Stu: I bet! I'm definitely gonna wait for them to improve more before I ever buy one.. They are awesome though; I find resin printers are particularly fascinating ;P
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