Hardware Design of NFC Authentication Device Used in Shared EV

Zhu Fugen1, Xiong Shusheng2, Li Wei2, Zhou Cailing2

Automobile Technology - - 汽车技术 -

(1. Zhejiang Institute of Communications, Hangzhou 311112; 2. Zhejiang University, Hangzhou 310027)

In order to provide a man- machine interface for customers to get and return vehicle in the unattended【Abstract】business model of shared EV, a complete schematic circuits was designed based on the STM8AF52 MCU, PN512 NFC IC. After the PCB sample was made, the capacitance, inductance and resistance in the antenna matching circuit were adjusted to appropriate value, and reliability test of CAN communication was carried out. The results show that the NFC communication antenna operates normally at the distance less than 7 cm. The power consumption under standby mode is less than 5 mA. There are no CAN communications errors during 1 200 hours test, and display brightness can meet the requirement of man-machine interaction.

Key words: Shared EV, NFC, RF antenna, CAN

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