ISO 15118: Communication Standard for EVs – DC Charging and Battery Management

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ISO 15118 is an international standard for communication between electric vehicles (EVs) and chargers, focusing on DC charging and battery management. This protocol enables secure, smart, and efficient data exchange that optimizes the charging process and ensures battery longevity.

How ISO 15118 Works

ISO 15118 uses the vehicle communication network to exchange data between the EV and the charger. The standard supports:

  • Automatic authentication and authorization of users and vehicles
  • Smart power and battery management
  • Exchange of battery status and charging capacity information
  • Plug & Charge functionality, where the vehicle and charger automatically establish a secure connection

The protocol operates over TCP/IP communication via Powerline Communication (PLC), ensuring a secure and reliable link between the charger and the vehicle.

Launch OBD-II adapters that support the protocol:

DBScar V, DBScar VII

ThinkDiag devices that support the protocol:

ThinkDiag 2

Ediag devices that support the protocol:

Ediag Plus, Ediag Elite

Vehicle types and brands supported by the protocol:

Electric vehicles (EV), primarily for DC fast charging and battery management, including Volkswagen ID series, Audi e-tron, BMW i series, Mercedes-Benz EQ, Porsche Taycan, Hyundai Ioniq 5, Kia EV6, Nissan Leaf, Tesla, and other EV models from around 2018 onward.

ISO 15118 enables secure communication between the EV and the charger, including advanced battery management functions and authentication.

Advantages of ISO 15118

  • Enables fast and secure DC charging of electric vehicles
  • Smart battery system optimization reduces battery wear
  • Standardized, facilitating interoperability between different EVs and chargers
  • Supports Plug & Charge, eliminating the need for extra cards or apps
  • Increases charging safety and efficiency

Disadvantages and Limitations

  • Requires compatible charging infrastructure and vehicles
  • More complex implementation compared to simple DC chargers
  • Limited to electric vehicles and compatible DC chargers
  • Full operation requires both software and hardware support

Applications of ISO 15118

ISO 15118 is used for DC fast charging, optimizing battery capacity, secure charging authorization, and monitoring EV battery system performance. The standard ensures reliable and interoperable communication, which is essential for the development of EV charging infrastructure and networks.

Conclusion

ISO 15118 represents a key standard for secure, smart, and efficient communication between electric vehicles and chargers. Its implementation enables professional diagnostics, optimized charging, and longer battery life, contributing to the growth of sustainable electric mobility.