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Newsletter of November 2019

November has been a month of hard work and preparation towards a clear finishline: the design freeze on December 20th. The design freeze ushers in the end of our design phase, this means that on December 20th our design is ready for production!

Fire safety demonstration

Safety is our number one priority and therefore we got a demonstration on fire safety this month by Fas Technologie and Johnson Controls. It has been a very good introduction for the team before going into the production phase!

A word from our Chief Chassis

The design of the motor is going right on track, we can therefore already look ahead to our next phase: the production phase. In this phase we go from a design to a built bike. It is thus key to prepare as much for it as possible. Our month goal was to have found companies for every part that we cannot produce ourselves. I am glad to say that we have completed our list. This gives us an edge going to the next phase.
Right now we are finishing the design of the battery pack, frame and swing arm. These components are on a late stage. The gear box (shown above) has become a bigger challenge than we thought before. Luckily we have enough people to create it within our timeframe.
Also we have finished the looks of the tail and tank of the bike. These will be made strong enough for our ride as well. We are all working hard to hit the design freeze December 20th and complete the design as soon as possible.

A word from our Chief Powertrain

The schematics are done and this month the PCB design has begun. Niek and Damien are working 4 days in the week at Prodrive Technologies until at least the Christmas break. Prodrive delivers a workplace, software for designing and will produce our PCBs. As a result, they play an important role in the development of the powertrain of the bike.
Above you can see the progress we made this month with the development of the new PCB called the interconnection board. The interconnection board is the PCB where the tabs of the cells will be welded to. The picture shows the design in the PCB editor. The red squares are the copper areas where the tabs will be welded to. The grey lines are the insolation barrier so that the cell tabs do not short circuit.
Above you see a zoomed in view of one section consisting of 6 cells. The PCB consists of different conducting layers and this is the top layer. The red outline is a copper plate that is connected to its inner conducting layers via holes called vias (all the circles). The PCB should handle 200A and since copper has an internal resistance, this will generate heat. Therefore a big conducting area is needed that can dissipate this heat. Next month simulations will be done to see how hot the PCB gets at a current of 200A.

Upcoming events

20 December
Design freeze

20 December - 03 January
Christmas break
Thanks for staying up to date with Electric Superbike Twente!
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