ISO 15118

ISO 15118 is a technical standard that defines the communication protocol between electric vehicles (EVs) and charging infrastructure, specifically for bi-directional power transfer. It specifies the requirements for the Electric Vehicle Supply Equipment (EVSE) and the Electric Vehicle (EV) in order to establish secure and efficient communication during the charging process.

ISO 15118-20

ISO 15118-20, also known as ISO 15118 second edition, is an extension of the original ISO 15118 standard. It introduces additional functionalities and improvements to enhance the overall charging experience. This new version supports advanced features such as Plug & Charge, where authentication and authorization processes are automated, making charging even more convenient for EV owners. It also enables secure communication over wireless networks, allowing EVs to connect to charging infrastructure without the need for physical cables.

Differences between ISO 15118 and ISO 15118-20

While ISO 15118 and ISO 15118-20 share the same goal of defining a standard communication protocol for EV charging, there are several differences between the two versions.

The first major difference is the introduction of wireless communication in ISO 15118-20. This eliminates the need for physical cables, providing more flexibility in terms of where EVs can be charged. Additionally, ISO 15118-20 supports more advanced security mechanisms to ensure secure communication between the EV and the charging infrastructure.

Another significant difference is the inclusion of the Plug & Charge feature in ISO 15118-20. This feature allows EVs to authenticate and authorize themselves automatically, simplifying the charging process for EV owners. With Plug & Charge, EVs can simply plug into a compatible charging station and start charging without the need for additional cards or mobile applications.

Furthermore, ISO 15118-20 introduces standardized messages for bi-directional power transfer. This means that EVs and charging infrastructure can communicate bidirectionally, enabling Vehicle-to-Grid (V2G) functionalities. V2G allows EVs to not only charge from the grid but also feed energy back into the grid, benefiting both EV owners and the energy grid system.

In conclusion

ISO 15118 and ISO 15118-20 are technical standards that define the communication protocol between EVs and charging infrastructure. While ISO 15118 establishes the basic requirements for secure communication during charging, ISO 15118-20 extends the functionalities by wireless communication, Plug & Charge feature, and standardized messages for bidirectional power transfer. These advancements aim to enhance the overall charging experience and promote the adoption of electric vehicles.