NFR is Northwestern University's student-run FSAE team that engineers and races a formula-style race car yearly against other collegiate teams. At the end of my sophomore year, the team decided to transition the vehicle from internal combustion to an electrical drivetrain.
Learn more about NFR here.
I led a team of 3-5 cross-functional engineers to develop the high-voltage battery pack for NU FSAE’s first-generation electric vehicle, owning the project from end to end, including requirements derivation, design, manufacturing, and validation. Some of my responsibilities for this project were as follows:
Problem-Solving Under Ambiguous Requirements: Collaborated with cross-functional engineers to derive requirements for first-generation designs, prioritizing vehicle performance, safety, budget, manufacturability, and thorough documentation.
3D CAD Modeling: Designed the 1000+ part battery pack assembly in SolidWorks to be manufactured using 3D printing, welding, and sheet metal bending and cutting. Validated designs with robust FEA simulations to withstand impacts >40gs.
Integration and Test: Integrated complex electromechanical assembly with PCBs, wire harnesses, battery cells, plastics, adhesives, and conductive metals to be electrically insulated for 600V and non-flammable per UL94-V0 specification.
Please see a brief slideshow on the project below.
7 Segment Battery Pack CAD
7 Segment Battery Pack
8x10 Segment CAD
8x10 Cell Holder FEA Results
8x10 Segment
4x20 Segment CAD
4x20 Cell Holder FEA Results
4x20 Cell Holder Print Time Lapse
I joined Northwestern Formula Racing during my sophomore year. As a member of the electronics sub-team, I worked on hardware for the power distribution module. I optimized power distribution on engine startup by cutting power to non-essential devices on the car and completely redesigning the PCB in Eagle EDA with proper documentation.
Problem: excessive voltage drops led to inconsistent engine turnover and unexpected car shutdowns. Solution: implemented functionality to automatically cut power to certain devices based on battery voltage. Successful design led to the first competition in recent years where electrical issues didn’t compromise performance.
Problem: due to the iterative nature of the inherited design and a lack of documentation, the PDM’s layout was confusing, and its functionality was minimally understood. Solution: fully redesigned the PCB with a more comprehensible layout and thoroughly documented it for future team members’ understanding. Built consensus on design choices with teammates and subteam lead by organizing in-depth design review meetings.
Through this project, I gained experience with PCB design, Arduino CAN integration, and power optimization.
Please see the design documentation for the project below.
New PDM Board Layout
New PDM Board