Vmesnik za polnilnik električnega vozila

KOVAČIČ, PRIMOŽ (author), Tuma, Tadej (mentor)

V sodobnem času srečujemo vedno več vozil na električni pogon. Energijo shranjujejo v baterijskih celicah, te pa se povezujejo v akumulatorske pakete. Pakete polnimo preko polnilnih postaj nameščenih v skoraj vseh večjih mestih in turističnih destinacijah po Evropi. Delimo jih na polnjenje z izmeničnim ali enosmernim tokom. V obeh primerih je zelo pomembna komunikacija med polnilno postajo in električnim vozilom. V diplomskem delu se osredotočam na komunikacijo pri polnjenju z izmeničnim tokom. Izdelano vezje skupaj s programsko opremo preverja frekvenco, amplitudo in širino pulza, ki jo pošilja električna polnilna postaja. Oscilator v postaji oddaja kvadratne signale s frekvenco 1 kHz in obratovalnim ciklom med 10 in 90 procentov celotne frekvence. Glede na širino delovnega cikla izračunamo največji dovoljeni tok, s katerim lahko postaja polni vozilo. Izračunan tok preko CAN vodila pošljemo baterijskemu nadzornemu sistemu, ki naprej komunicira s polnilnikom nameščenim v vozilu. Polnjenje se prične ob zmanjšanju notranje upornosti na komunikacijski (CP) liniji. Tako sporočimo postaji, da smo pripravljeni na sprejem energije.

• Language: Slovenian
• Keywords: električna polnilna postaja, polnjenje električnega vozila, komunikacija s polnilno postajo
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2018
• PID: 20.500.12556/RUL-105184
• Publication date in RUL: 07.11.2018

Secondary language

• Language: English
• Title: Interface for charging electric vehicles

Abstract

Today we are experiencing an incresing number of electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV). They store energy in battery cells, which are then connected into battery packs. Electric vehicles are charged at charging stations installed in major cities and tourist destinations across Europe. Stations can charge with alternating or direct current. In both cases, communication between charging station and electric vehicle is very important. In this thesis i focus on communication between charging station and EV using alternating charging current. Circuit hardware and software are checking the frequency, amplitude and pulse width (PWM) send by charging station. The oscillator in station sends pulses with frequency 1 kHz and duty cycle between 10 and 90 percent. Depend on duty cycle, we calculate maximum current by which the vehicle can be charged. The calculated current is then send via CAN bus to the battery management system(BMS), which communicates with charger placed in the vehicle. Charging begins when the internal resistance is reduced between ground(PE) and communication (CP) line. This signal communiates with charging station that the vehicle is ready to accept energy and start charging.

• Keywords: electric charging station, electric vehicle charging, communication with charging station