MICROSAR Charge

Enable standards-based, secure charging communication across all major protocols. PLC-based communication for CCS and NACS is implemented according to ISO 15118, DIN SPEC 70121, and SAE J2847/2, including support for AC and DC charging with EIM and Plug and Charge, as well as SLAC and bidirectional power transfer according to ISO 15118-20.

At the same time, flexible value-added services can be integrated via HTTP and DNS to support customer-specific use cases, including proprietary communication between the vehicle and the charging infrastructure.

Security requirements defined by ISO 15118-2 and -20 are fully implemented in combination with MICROSAR Classic Ethernet and Crypto modules, including TLS 1.2 and 1.3, OCSP, XML signatures, and elliptic curve cryptography for Plug and Charge.

MCS uses Ethernet (10BASE-T1S) according to ISO 15118-10 as communication medium. The requirements for the higher layers of the charging protocol are specified by ISO 15118-20 which is already supported by MICROSAR Charge (see “MICROSAR Charge for CCS and NACS”). The necessary driver modules for the communication via 10BASE-T1S are also available. Therefore, MICROSAR Charge already offers a complete software solution for the charging communication of megawatt charging systems.

In addition to the Ethernet-based charging protocols, MICROSAR Charge also contains software modules for GB/T 27930 (2011 and 2015) and CHAdeMO to cover the Chinese and Japanese market. These standards specify the charging communication for conductive DC charging using CAN as communication protocol. Due to the message length, the transport protocol according to SAE J1939 is additionally required for GB/T 27930. AC charging is only controlled via the PWM signal and thus without a digital charging protocol.

Wireless charging communication is used for inductive charging and electrical charging using an inverted pantograph. MICROSAR Charge supports both WPT (Wireless Power Transfer) and ACDP (Automatic Connecting Device Pantograph) according to ISO 15118-20. The OppCharge protocol (Opportunity Charging) is available for electrical charging with inverted pantographs as well. The driver modules required for Wi-Fi based communication may be connected to the software stack via generic Ethernet drivers. For the use of roof-mounted pantographs the charging communication is realized through Powerline Communication similar to CCS and NACS.

Enable flexible integration of charging communication in Software-Defined Vehicles. MICROSAR Charge adapts to diverse hardware platforms and operating systems, supporting both microcontroller-based ECUs with real-time systems and microprocessor-based environments with POSIX-compliant operating systems.

Support multiple integration scenarios within zonal architectures. Whether implemented in onboard chargers or zonal ECUs, MICROSAR Charge in combination with MICROSAR Classic provides a comprehensive, standards-compliant solution for charging communication.

Integrate seamlessly into high-performance computing environments. On HPCs, the solution connects smoothly to POSIX-based software ecosystems and leverages native system components such as network stacks and crypto libraries to enable efficient charging communication.