Combined Charging System (CCS)

Combined Charging System (CCS)
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Name	Combined Charging System
Type	Electric vehicle charging
Developer	ABB, BMW, Chrysler, Daimler, Ford, General Motors, Mercedes-Benz, Porsche, Volkswagen
Introduced	2011
Voltage	Up to 1000 V DC
Current	Up to 500 A (theoretical)
Standards	IEC 62196-3, ISO 15118

Combined Charging System (CCS) is a family of standards and connector designs for fast charging of electric vehicles developed to harmonize alternating current and direct current charging under a single interface. Originating from a consortium of Automotive industry leaders including BMW, Daimler, Ford, and GM, CCS was standardized to compete with other systems such as CHAdeMO and proprietary designs by manufacturers like Tesla. CCS aims to enable high-power charging compatible with grid infrastructure projects led by entities such as the European Commission and national programs in the United States and Germany.

Overview

CCS combines AC charging using the IEC 62196 Type 2 or Type 1 vehicle inlet with DC fast-charging contacts integrated into the same housing, promoted by manufacturers including Volkswagen, Audi, Porsche, Hyundai, and Kia. The system supports scaling from low-power AC charging standards endorsed by SAE International to high-power DC deployments showcased at corridors funded by the North American Charging Infrastructure Program and European initiatives like the TEN-E network. Market adoption contrasts with competing ecosystems such as CHAdeMO and regional solutions in China backed by organizations like the China Electricity Council.

Technical specifications

CCS implementations are defined within technical norms including IEC 62196-3 and interoperability guidance referencing ISO 15118. Electrical characteristics cover DC voltages up to 1000 V and currents theoretically approaching 500 A for high-power charging, influenced by pilot signaling and proximity circuits described in SAE J1772 and associated documents. Communication layers include power line and digital signalling compatible with implementations by companies such as Siemens and ABB. Thermal management, connector pin layout, and ruggedization are specified to meet certification regimes in jurisdictions regulated by agencies like the CENELEC.

Connector types and variants

Two primary mechanical variants are prevalent: CCS Type 1, used primarily in North America and associated markets with original contributors like Chrysler LLC, and CCS Type 2, widespread across Europe and adopted by manufacturers including Mercedes-Benz Group and BMW Group. The CCS Type 2 form factor integrates with the IEC 62196-2 Type 2 inlet standardized for three-phase AC by organizations including CENELEC and VDE. Hardware vendors such as Delta Electronics and Leviton produce cables and connectors meeting manufacturer requirements from Porsche AG and fleet operators like DHL. Emerging high-power designs reference modified pin arrangements and cooling solutions inspired by research from Fraunhofer Society laboratories.

Charging modes and protocols

CCS supports multiple charging modes that align with protocol frameworks like ISO 15118 (including Plug & Charge) and legacy signaling such as the extended SAE J1772 control pilot. Mode negotiation covers state-of-charge management, authentication, and billing workflows integrated with platforms including ChargePoint, Electrify America, and network operators managed by utilities like National Grid plc. Communication stacks support both in-band control and Ethernet-based communication options used by developers at Bosch and Volkswagen Group Services to implement smart charging and vehicle-to-grid experiments linked to programs run by EPRI.

Adoption and deployment

Adoption accelerated following commitments by OEMs such as Ford Motor Company, General Motors, and Stellantis to standardize on CCS for new models, spurring infrastructure rollouts by companies including Ionity, Electrify America, and state-led projects in countries like Norway. Public charging networks coordinated with energy companies like Shell plc and BP, and municipal programs in cities such as Amsterdam and Los Angeles expanded high-power CCS stations. Competitive dynamics involved negotiations with entities promoting CHAdeMO and Chinese standards administered by the State Grid Corporation of China.

Compatibility and interoperability

Interoperability relies on adherence to standards by automobile manufacturers—Renault and Nissan historically favored CHAdeMO before offering CCS on select models—and charging network operators implementing uniform payment and roaming via protocols coordinated with the OCPP. Hardware compatibility challenges addressed by suppliers like Aptiv and TE Connectivity include cable cross-compatibility, cooling integration from vendors like Eaton Corporation, and firmware updates managed in collaboration with research institutions such as MIT and DTU.

Safety, standards, and regulation

Safety and regulatory compliance for CCS installations reference standards and certification bodies including IEC, ISO, UL, and regional regulators such as European Commission directorates and the USDOT. Protective measures encompass interlock systems, temperature monitoring, and residual current detection shaped by guidance from TÜV SÜD and Underwriters Laboratories. Policy interventions by governments and supranational actors—illustrated by funding mechanisms from the European Investment Bank and procurement rules from agencies like the U.S. Department of Energy—have influenced deployment standards and consumer protections.

Category:Electric vehicle charging