Combined Charging System
The Combined Charging System (CCS) is a standardized charging framework for plug-in electric vehicles that facilitates both alternating current (AC) and direct current (DC) charging through the use of Combo 1 (CCS1) or Combo 2 (CCS2) connectors. These connectors are essentially extensions of the IEC 62196 Type 1 and Type 2 connectors, augmented with two additional DC contacts to enable high-power fast charging, making CCS a versatile option for modern electric vehicles.
History and Development
The development of the CCS was driven by the need for a universal standard that could accommodate different regional charging interface preferences, leading to the integration of both Type 1 (North America) and Type 2 (Europe) connectors. This development was guided by the International Electrotechnical Commission (IEC), specifically under the IEC 62196-2 standards framework. One of the main challenges in creating the CCS was devising a vehicle inlet that could seamlessly integrate existing AC connectors with additional DC contacts. This requirement was essential to support a range of functionalities such as load balancing and charge authorization.
Technical Specifications
The CCS architecture involves multiple components: the charging couplers, charging communication protocols, charging stations, and the electric vehicle itself. It supports communication protocols as defined by the ISO 15118, allowing for secure and smart charging processes, which include features like bi-directional charging and discharging. The CCS enables vehicles to rapidly charge, accommodating high power levels of up to 350 kW through the Combo connectors.
Competing Standards and Global Adoption
The CCS competes with several other charging systems for high-power DC charging, including CHAdeMO, which is widely utilized in Japan and previously in North America and Europe, and the GB/T standard in China. In North America, the North American Charging Standard developed by Tesla, Inc. also stands as an alternative. Nonetheless, the adoption of CCS continues to grow, driven by its flexibility and the backing from major automotive manufacturers.
Use Cases and Future Prospects
The CCS is pivotal for enabling fast charging infrastructure across various regions. Its dual AC/DC functionality allows electric vehicles to be charged at home or at public charging stations, catering to the needs of different users. CCS is integral to the expansion of electric mobility, promoting the transition towards sustainable transportation systems.