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OCPP Interface Card (OIC) for Smart EV Chargers

Overview

The Open Charge Point Protocol (OCPP) facilitates communication between networked charging stations and charge management systems. This system allows standalone EV chargers to connect to an OCPP server, enabling remote EV authorization, charger configuration, real-time alerts, session controls, and fault management. It offers users and manufacturers the flexibility to use any charger or EV system, supporting various charging techniques like CHAdeMO and Type-2 CCS, enhancing interoperability and user convenience.

System Benefits​:

  • Supports CHAdeMO and Type-2 CCS connectors, allowing flexible use with CAN or PWM communication.
  • Network interfaces such as GSM, Wi-Fi, and Bluetooth® Low Energy (LE) provide flexibility to interface with the charger and inform about the battery type and vehicle.
  • The system can connect to 3.3kW or any charger through SPI/Pmod™ as an interface card.
  • The MCU is used for the OIC card to interface with a vehicle through the charging gun.

Block Diagram

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16:9 AS054 AS054 AS054 Sheet.126 Sheet.122 Sheet.125 Sheet.123 Sheet.110 Sheet.111 Sheet.113 Sheet.115 Sheet.117 Sheet.119 Sheet.124 Sheet.112 Sheet.114 Sheet.116 Sheet.118 Sheet.120 Sheet.121 Charge Gun Non-Renesas Component Sheet.17 Sheet.18 Sheet.19 Charge Gun.129 Non-Renesas Component Sheet.131 Sheet.132 Sheet.133 CAN Transceiver CAN Transceiver CANTransceiver Board - Optional Sheet.71 Sheet.73 Connector Line.157 Connector Line Connector Line.164 Connector Line.165 Connector Arrow GSM GSM GSM Connector Arrow.169 Connector Arrow.170 Connector Line.171 Connector Arrow.173 Connector Arrow.174 Connector Arrow.175 Connector Arrow.176 Connector Line.177 Connector Line.178 Connector Line.179 Connector Line.181 Connector Line.182 Connector Line.183 Connector Line.184 Connector Arrow.185 Connector Arrow.186 Connector Line.187 Connector Line.188 Connector Arrow.189 Connector Line.190 Connector Arrow.191 INPUT INPUT INPUT CSS Type-2 Charge Gun CSS Type-2 Charge Gun CSS Type-2 Charge Gun CHAdeMO Charge Gun CHAdeMO Charge Gun CHAdeMO Charge Gun 12V/50mAmax 12V/50mAmax 12V/50mAmax 3.3v/500mAmax 3.3v/500mAmax 3.3v/500mAmax PMOD 2A MCU Interface Connector PMOD 2A MCU Interface Connector PMOD 2A MCU Interface Connector 3.3V 20mA 3.3V 20mA 3.3V 20mA 3.3V/350mAmax 3.3V/350mAmax 3.3V/350mAmax 12V/50mAmax.201 12V/50mAmax 12V/50mAmax Connector Line.202 Connector Line.203 Connector Line.204 Connector 1 Connector 1.206 Connector 1.207 Sheet.215 Sheet.211 1 1 1 1 Sheet.217 1 1 1 Sheet.219 Sheet.220 2 2 2 Sheet.222 Sheet.223 2 2 2 Sheet.228 Communication Lines B.554 2 2 2 Sheet.231 Sheet.232 2 2 2 Sheet.234 Sheet.235 2 2 2 Sheet.237 Sheet.238 4 4 4 Sheet.240 Sheet.241 1 1 1 Sheet.246 Communication Lines B.554 2 2 2 Connector 1.249 Connector Line.250 VCC VCC VCC Sheet.278 MCU MCU MCU ADC ADC ADC PWM PWM PWM VDD VDD VDD SPI SPI SPI UART UART UART CAN CAN CAN ADC ADC ADC GPIO GPIO GPIO SPI SPI SPI UART UART UART Bluetooth Low Energy BLE Bluetooth Low Energy Bluetooth Low Energy VCC VCC VCC UART UART UART Wi-Fi Wi-Fi Wi-Fi Wi-Fi VCC VCC VCC SPI SPI SPI

MCU

RA Arm Cortex-M MCUs

Bluetooth Low Energy

Bluetooth Low Energy
Low Power Wi-Fi

Wi-Fi

Low Power Wi-Fi

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Videos & Training

Renesas understands that ensuring chargers must work reliably across various site conditions and connectivity types can often lead to integration headaches. That's exactly why we've put together this demonstration video, showcasing our customized open-source SteVe software stack, designed to support a modular set of communication protocols. This approach guarantees that you can test your Open Charge Point Protocol (OCPP) connectivity in a wide range of environments, including those challenging rural areas with limited infrastructure, to get you to market more quickly. 

Related Resources

News & Blog Posts

Blog Post
Mar 2, 2023
Drive without Limits: Interoperable Electric Vehicle (EV) Chargers