Tell me about your Bicycle

TrippleDip

Well-Known Member
What size battery you making? What kinda cells? Voltage? BMS or balance charger?
Got a bunch of samsung cells for $2 a piece, making a 13s3p or 47v 4800mAh battery with bms for under a hundred bux. Pic related.

battery.jpg

Firm pressure, a spot welder specifically for batteries
Pressure is my guess too. When I weld strip to strip it works fine, usually between 1000 and 1500 amps per weld, between battery and strip it usually maxes out around 150 amps. I think resistance between the battery and strip is the problem. I pressed so hard I bent my homemade copper electrodes. I also tried tungsten electrodes but they were even worse. Idk if I need more surface area and current maybe, my electrodes are pointed but I have been looking at making new ones out of bar stock so they will have larger area and more contact.

Your posts have been super inspiring btw. Pretty much cleared up any doubts about range for pedal assist and hill climbing ability.
 

GrassBurner

Well-Known Member
I raced BMX for a few years back in the early 90's. Rode a JMC cruiser frame back then. Would love to find another track to just bullshit around, but sadly most of the local tracks have all gone by the wayside.
 

GrassBurner

Well-Known Member
Oh man it's horrible.....so many places turned into houses and such
Yeah man we used to have a track right down the street. Me and Dad would get up early Saturday morning and head over there to prep the track. Spend a couple hours with rakes and shovels, then I'd have a couple hours to practice before qualifying.

We had another track that was right on a lake. In between heats we would haul ass to the lake and swim, then pedal back up to the gate just in time for the next heat. Those were the good ol days. I remember lots of neon colors, and all kinds of badass stickers.

How many times did you flip over the gate trying to get that extra half second? I remember 2 or 3. Now thats a true walk of shame :lol:
 

GrassBurner

Well-Known Member
I just gave away that exact bike!
To a newly separated dad, mom
Took everything and when kids came to see dad, no bikes.
I had to fill the void for them.
No joke?!?! Man these bikes must have some good vibes. I didn't want to get rid of the bike, but same situation. Dad was looking to get a bike for his son, family was going through a rough patch and he just wanted to get his son something nice for Christmas. Lost money on that bike, but I remember being a poor kid wanting a nice bike. It all comes around I reckon.
 
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