Choose charging pile optocoupler for efficient charging

With EV charging power rapidly increasing (50 kW to 350 kW+), charging stations require enhanced voltage isolation, noise immunity, and signal integrity. Optocoupler modules, offering optical isolation, fast fault response, and reliable data transmission, are the preferred solution.

High Isolation & Interference Immunity

Providing up to 5 kV isolation, optocouplers ensure safety in high-voltage DC systems (e.g., 350 kW) and eliminate ground loops, ensuring reliable CAN and LVDS communication.

Fast Response & Precise Protection

Nanosecond switching speeds enable rapid fault detection and millisecond-scale breaker tripping, safeguarding hardware and personnel. Adjustable over-current/over-voltage thresholds ensure compatibility with CCS, CHAdeMO, GB/T, and other fast-charging protocols.

Low Power Consumption & Optimized Thermal Management

By optimizing the LED driver design, the photoelectric conversion efficiency is increased to more than 70%, reducing the heat generation of the module. The low power consumption design helps to improve the overall energy efficiency of the charging pile and reduce the difficulty of thermal management.

Wide Temperature Range & Exceptional Durability

Operation from –40 °C to +105 °C and minimal performance drift (< 5 %) after rigorous testing (damp-heat, thermal-shock) ensure years of reliable operation.

Enhanced security for optocouplers

Optocouplers prevent stray-signal hazards in high-voltage DC charging by using light to transmit control signals, eliminating conductive paths and unintended current flow. Built-in self-tests continuously monitor LEDs and sensors, providing early warnings and enabling proactive power shutdown.

How optocouplers improve charging efficiency

While not handling bulk power, optocouplers boost system efficiency through:

• Precise PWM Control: > 10 MHz bandwidth maintains sharp high-frequency switching, minimizing energy waste.
• Stable Data Sampling: Cleaner feedback enables charging algorithms to achieve optimal power curves faster.
• Thermal Synergy: Minimal self-heating allows power modules to operate at optimal temperatures.

How to Improve Optocouplers Reliability

Designed for continuous operation in public charging stations, optocouplers:

• Withstand 1,000 h of IEC damp-heat testing without isolation loss.
• Tolerate mechanical vibration and shock encountered in various environments.
• Exhibit drift under 3 % after 5,000 h of continuous operation, extending maintenance intervals beyond three years.

Reducing Optocoupler O&M Costs

Despite a potentially higher initial cost, optocouplers lower lifecycle expenses through:

• Reduced Service Calls: High reliability decreases field maintenance visits by over 50 %.
• Extended Replacement Cycles: Multi-year lifespans extend component replacement intervals from 2 to 5 years.
• Maximized Uptime: Fewer unplanned outages increase station availability and operator ROI.