Introduction
Hey everyone! We are Formula Electric Belgium, a Formula Student team based in Leuven. We are a team of engineering students from KU Leuven building fully electric, autonomous-capable Formula Student race cars. Every season, our goal is to innovate on efficiency, safety, and reliability while competing against top universities across Europe.
Here is a quick look into one of our essential safety electronics boards: the High Voltage Indicator (HVI), designed and manufactured via AISLER!
HVI
For our accumulator, we redesigned our HVI. It monitors the Tractive System (TS) voltage across the vehicle accumulator and drives an indicator LED whenever the voltage crosses the ~60V safety threshold, it also send a signal to our AMS for the TSAL (Tractive System Active Light).
Technical Overview:
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2-layer, 1.6 mm, ENIG finish, 35 um copper on AISLER Beautiful Boards Blitz (59 x 34.75 mm).
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Non-isolated buck converter stepping down TS voltage (600V max) to a 12V rail.
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Threshold at around 57V and falling off-threshold at around 44V.
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Optocoupler providing 3.7kVrms isolation across a >4mm creepage gap to bridge TS to the 24V LV side.
Favorite AISLER feature
The Blitz Service paired with ENIG finish! For safety-critical boards like the HVI, master AMS, and TSAL, fast turnaround times without compromising surface finish quality allow us to iterate quickly during design season.
THANK YOU
Thanks to AISLER for keeping our development cycle fast and reliable this season! Drop a comment if you have questions about our design.