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Stuart Harwood
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92 followers
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Battery welding
Recently I bought a battery spot welder for my cruiser project. I purchased:  Panasonic/Sanyo NCR18650GA cells, (the same you find in a Tesla) Sunkko 709A 220V welder 0.2mm pure nickel strips I had to make a new battery pack for Jenna before I could start o...
Battery welding
Battery welding
borderline.co.nz
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Disc brake conversion
I decided early on that I wanted disc brakes on this bike. They'll provide the necessary stopping power for the 2000 watts of power that I expect this thing to put out, and hopefully look a bit bogan. Unfortunately the Dyno frame doesn't have mounts for the...
Disc brake conversion
Disc brake conversion
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New project: Dyno Glide electric tracker
I've been thinking about putting together another electric bike for awhile. Since making up Jenna's e-bike, I've found myself riding it quite often - more than I thought I would. It's the perfect transport mode for shortish trips around Auckland, from cruis...
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Battery re-mount
The latest task on the e-bike was moving the battery pack
from its temporary home on the back carrier, in a dodgy shoe box, to being
properly mounted in the frame. Having the batteries on the back carrier is
problematic because it shifts the centre of gravi...
Battery re-mount
Battery re-mount
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Battery disasters
Long time between posts - mostly because I've spent the last couple of months struggling away trying to get the battery pack working properly. In classic Stu fashion, I designed the pack without properly consulting the wealth of information online, and figu...
Battery disasters
Battery disasters
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Component sourcing
Been a bit of a long time between blogs, as I've been held back waiting for my next batch of components to arrive. I've had on order from MXUS , my supplier in China: - A motor - Controller - Accessories (throttles, e-brakes, displays, etc.) And from T-Whit...
Component sourcing
Component sourcing
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Battery charging circuitry part 2 - Relay driver & protection
To get the relays to automagically energise on connection with the battery charger, a small switching circuit needed to be drafted up.  Below is the switching schematic, jiggled around a bit for simulation. There's probably no point getting too carried away...
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Battery charging circuitry part 1
Because the battery voltages in the e-bike are going to be around the 44-50V range, buying a charger/power supply to charge this thing is likely to be expensive.* So after consulting my semi-partner in crime Jared at work, we came up with an idea to upon co...
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Bike frame
Behold, the Leichtsport "Senori". This will provide the skeleton for the build. One of the main requirements for the bike build was not having to need to change clothes to ride the thing. Hence, I made sure the bike had a step-through frame, and a chain gua...
Bike frame
Bike frame
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Battery testing
Here are the 42 battery cells I'm re-homing from the scrap pile at work. They're 4,400 mAh, 3.7V, Li-Ion batteries, with a protection circuit built in. They're not the fanciest battery in the world, but at the price I got them at (free), they're pretty unbe...
Battery testing
Battery testing
borderline.co.nz
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