Introduction

This invention presents a security measure from relay attacks that can target electric or hybrid vehicle batteries and their charging stations in the context of Vehicle To Grid (V2G).  It provides protection against possible electricity theft, possible compromise of vehicles connected to the charging post, or evasion of payment for the delivered electricity. It also profiles the charging equipment and intercepts energy delivery anomalies.

Technical features

This is a methodology to verify the safety of the connection of an electric or hybrid vehicle to a charging column by profiling it. In fact, it is well known that the connection between the vehicle and the charging column is not only limited to the transfer of energy, but also allows the transfer of information such as charging parameters, charging schedules and parameters for economic transactions related to the energy flows exchanged between the electric vehicle and the charging apparatus.

The invention is able to authenticate the charging post to which the vehicle is connected using physical parameters such as imperfections in voltage values, duration of post state transitions, intra-packet time and clock deviation.

This methodology can be applied through an external device, without changing  the implementation of the communication protocols of existing columns and devices installed around the world.

TRL 2.

Possible Applications

• Application to all new generation electric vehicles taking advantage of Vehicle To Grid (V2G) in order to increase their safety level;
• Implementation as an external device that can be installed in vehicles that originally lack them.

Advantages

• Solves the security problem related to all relay attacks between electric or hybrid vehicles and charging stations;
• Provides enhanced security in communication and energy exchange between electric vehicles and the smart power distribution network called smart grid;
• Requires no modification or replacement to implement the communication protocols in use in existing columns.