Electric Racing Miskolc 2025

Electric Racing Miskolc is a student organization at the University of Miskolc, Hungary, dedicated to designing and building an electric formula-style race car to compete against university teams worldwide.

About 2 years ago, we embarked on our first fully electric race car project. Our goal for this season is to have a fully functional vehicle ready for competition. The highlighted events of our season include FS East and FS Easter.

The steering electronics process signals from the steering wheel buttons and encoders, transmitting them to the display via an ST3485 transceiver. An STM32 microprocessor oversees the entire system’s operation. Due to the limited and uniquely shaped space inside the steering wheel, the PCB has been designed with an unconventional form.

The circuit includes a 16-position encoder along with a debouncer circuit to minimize signal interference. The buttons are fully customizable, allowing adjustments based on different driver preferences.

Additionally, the system features seven LEDs and their control circuit, which provide error feedback. In the event of a critical issue, the LEDs illuminate red, while an orange light signals a less severe error.

AMS

The accumulator management system (AMS) is responsible for controlling and ensuring the safety of the segments and the cells inside. Our system consists of an AMS Master control unit and several AMS Slave modules. The battery consists of five segments, each with a 22S2P layout, providing 465 Volts to the vehicle.

The passive type AMS system has several functions, including monitoring the voltage and temperature of the cells and ensuring equal sharing of the load between the cells. It also prevents excessive discharge voltage that could cause permanent damage to the system, and during charging it monitors the voltage of the cells and stops the charging process when they have reached their maximum voltage level. It also includes a shutdown circuit that turns on if the system fails to measure voltage in a cell or a temperature sensor fails, thus ensuring the car is shut down safely.

In parallel, we made significant progress in the structural design by replacing the traditional aluminium frame with a full carbon fiber solution. Both the molds and the final frame were designed and manufactured internally at Politecnico di Milano. This change not only reduces weight but also improves rigidity and dynamic handling.

In our car, according to the Formula Student regulations, the low-voltage circuits are grounded to the chassis and the high-voltage system must be isolated from this. To solve this, we used ISO SPI (isolated serial peripheral interface), which means that the 4 ICs per segment are connected in a so-called daisy chain form with two wires, and all of the segments are connected like this together. A microcontroller acquires the measured data through this system and performs load balancing when necessary.

This solution allows us to communicate with the segments at high speed and reduces the number of wires needed.

The fast, high-quality production and rapid delivery of these high-priority printed circuit boards would not have been possible without the cooperation of the Eurocircuits team.

This year, our partnership with Eurocircuits has been crucial, allowing us to rapidly make our PCB designs with high-quality manufacturing and fast delivery. Their support has been a key factor in our progress, and we look forward to continuing this collaboration in the future.

For more information please visit the Electric Racing Miskolc website.