This has to be the most underestimated component on our car.  We figured that this box would be designed in about a week and then fabricated in another one or two weeks.  We could not have been any more wrong!  It has almost been two months now and it is just now coming upon completion.  The main reason for the large time requirement turned out to be from the many safety constraints on the materials selection for the box.  The ideal material would be one that is non-conductive, flame retardant, and mechanically robust.  Finding one material that is economical and easy  to work with while meeting the previous requirements turned out to be the greatest difficulty.  

In the end we chose a composite design in which the container is made from aluminum and then lined with multiple sheets of Nomex cloth to achieve the flame resistance and non-cunductive properties desired.  As with all of our designs weight saving was key and this design met that criteria best while having a great safety performance as well.

Overall we are extremely pleased with the outcome of the box.
Picture
Picture
 
So far this quarter has been spent with finalizing the design of many of our electrical power train components.  Within the past week or so we began manufacturing those components, such as the battery and motor controller boxes, motor mount and dashboard housing.  The battery box turned out to be far more complicated to design for us due to the electrical shock hazard safety constraints of using a conductive material.  In the end we were able to choose a design that is very safe yet light in weight.
The next couple of weeks will be pretty busy for us because our plan is to have the car drivable via both the electric and gas power systems for testing by the end of February.  After sufficient validation testing the appropriate corrections will be made to any components if necessary and then the car will be stripped and painted.  A few final test drives will be done to ensure everything gets properly installed.

Matt

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