What is BS EN 61851-22:2018?

BS EN 61851-22:2018 is a technical standard that specifies the requirements for conductive charging of electric vehicles (EVs) using AC (Alternating Current) or DC (Direct Current) power supply systems. This standard covers various aspects of EV charging, including safety, power quality, communication between the EV and the charging station, and interoperability.

Key Features of BS EN 61851-22:2018

The standard defines different charging modes, known as Mode 1 to Mode 4, depending on the type of charging equipment and power supply used. Each mode has specific requirements and capabilities, ensuring compatibility and safe operation.

Mode 1 refers to charging from a conventional socket outlet with no specific control or protection functions. It is primarily used for emergencies and temporary charging and is not recommended for regular EV charging due to limited safety measures.

Mode 2 involves charging with added protection devices, such as residual current devices (RCDs) and additional control functions integrated into the charging cable or portable control device. This mode provides increased safety compared to Mode 1 and allows for higher charging currents.

Mode 3 is the most commonly used charging mode in public and home charging stations. It requires a dedicated EV supply equipment and specialized infrastructure with enhanced safety features, such as pilot signal communication for controlling the power supply and ensuring mutual compatibility between the EV and the charging station.

Mode 4 is the highest level of charging, relying on a DC power supply with high power levels up to 350 kW. It requires additional safety precautions and specialized infrastructure, making it suitable for fast charging stations along highways or other highly frequented areas.

Benefits and Challenges of BS EN 61851-22:2018

By standardizing EV charging infrastructure, BS EN 61851-22:2018 provides several benefits. It ensures interoperability between different EV models and charging stations, allowing EV owners to charge their vehicles wherever compatible charging infrastructure is available. The standard also addresses safety concerns by defining the necessary protection measures, reducing the risk of accidents or damage caused by faulty equipment.

However, implementing the standard can present challenges. Upgrading existing infrastructure to meet the standard's requirements may involve significant investments for both public and private stakeholders. Ensuring compatibility with legacy systems and older EV models can also be a challenge.

Nevertheless, BS EN 61851-22:2018 plays a crucial role in promoting the wider adoption of EVs and facilitating the establishment of a reliable and efficient charging infrastructure that meets international standards.

The Future of BS EN 61851-22:2018

As the electric vehicle market continues to grow rapidly, BS EN 61851-22:2018 will play an increasingly important role in shaping the future of EV charging. Ongoing advancements in technology and increasing demand for faster charging will lead to further revisions and updates of the standard to accommodate new requirements.

Additionally, international harmonization of EV charging standards will be critical to ensure seamless cross-border travel for EV owners. Standardization efforts are already underway, promoting global compatibility and interoperability among different charging networks.

In summary, BS EN 61851-22:2018 is a comprehensive technical standard that establishes the foundation for safe and efficient conductive charging of electric vehicles. By providing guidelines and requirements for various charging modes and infrastructure, the standard accelerates the adoption of EVs and contributes to building a sustainable transportation ecosystem worldwide.