Power drain

The big ol’ resistor that straddles the two high voltage poles on the connector is problematic. Although it only lets a small amount of power bypass the connector it is enough to slowly drain the battry if left unatended. So I need to pop in battery isolator switch on the positive cable comming out of…

Battery BMS stuff

I have quickly realised that the triumph of 1st wheel motion is momentary. Next on the list of things to complete is the battery BMS so I can charge the battery. I have no mains power supply so this is important to do quiickley so I can keep the wheel spinning. The Nissan leaf busbar…

Tuning #1

Have spent the evening calibrating the 8kw QS V3 motor. Out of the box the motor was a but rough because the controller and the motor are not from the same supplier this is normal apparently. Watching the hub motor robotically rotate with beeps and jerks as it Identifies the angles of motor using the…

Wiring…

Okay, time to make a start on the cable loom for XJ600e, finally. Bit of a boring post but an important one because once all is sound with the wiring then finally the panel design can start with the assurement that the packaging for the powertrain is concrete. This means less changes to the final…

Isolator carriage v2 printed

I know I should be used to it by now (after all I see it happens all the time in University and in the design industry) but it still amazes me that I can print designs into reality that only exist on a computer. Anyway, I managed to push out a rough print overnight to…

Isolator carriage v2

Have made some changes to v1 design of the isolator carriage. A bit more cable management and some amendments to the BMS to ensure the charge input cables are orriended correctly, etc. Need to print the design to double check it maybe get some advise of the management of the cables. Currently the high and…

300mm cuts

Have started to think about the opportunity to 3D print panels rather than metal form them. The more I think about it the more it makes sense. Plastic doesn’t conduct electricity, useful trait on an electric bike… and the production will be easier for my CAD skillset. Having had the printer for a while I…

Rear battery box cover v2

I have spent an evening making some changes to the design of the original battery box to give better clearance for the cables I originally planned to through the bottom of the box because that is where the BMS used to be but now that it is better placed above the battery amendments need to…

Mock under bracket

Interesting to see the growing form of the battery as a whole with the under bracket mocked up in card. All seems to be good. The contactor can be easily removed and replaced and when in position both the contactor and the DCDC convertor clearance is good. On issue is the cable routing. The high…

Step back and see…

Great light today, thought it word be a good opportunity to take a step back and have a look at the old bike to observe it from a distance. Being stuck in the garage I’m often working up close and never get to see how it looks from a ‘normal’ street level perspective. Social media…