What safety measures are required for the operational version of the AC charging pile's mainboard?

The safety measures for the operational version of the AC charging pile mainboard mainly include the following aspects:

Electrical safety protection

• Leakage protection: The incoming line terminal is equipped with an RCD (Residual Current Device) with a rated residual current of ≤30mA, which supports ground fault detection. Type A or Type B residual current protectors are used. The new national standard GB/T 18487.1-2023 clearly requires that AC charging equipment must have protective measures against fault currents, including a Type A residual current protection unit with smooth DC residual current protection for 6ms or more, or a combination of a Type A residual current protector and a device for smooth DC residual current monitoring and protection of 6mA or more, or a Type B residual current protector.

• Automatic power off: The output will be automatically disconnected when fully charged or after 8 hours of continuous charging; the output voltage will be ≤12V after the load is removed.

• Overload and Short Circuit Protection: The output circuit must possess overcurrent and short circuit protection functions.

Fire prevention and fault protection

• Flame retardant shell: The shell should have a fully enclosed structure, and the surface flame retardant material should meet the requirements of the GB/T 5169.16 vertical burning test.

• Temperature control: Environmental adaptability must pass high and low temperature tests ranging from -40℃ to 70℃.

Data security and tamper resistance

• Data encryption: During data transmission, encryption algorithms such as AES, RSA, and national cryptographic algorithms are used to encrypt data. When communicating with vehicles, back-end management systems, and other entities, encryption algorithms are employed to encrypt the transmitted data, ensuring the confidentiality and integrity of the data.

• Identity authentication and access control: Verify the identities of both communicating parties through digital certificates or keys to prevent unauthorized devices or users from accessing the system. Adopt multi-factor authentication methods, such as passwords, verification codes, fingerprint recognition, etc., to ensure that only legitimate users can operate the charging pile

• Data tamper-proof mechanism: Employing data calibration and tamper-proof mechanisms to achieve data verification and traceability. Leveraging the decentralized and tamper-proof characteristics of blockchain to protect and manage the data generated by charging stations, ensuring the integrity and security of billing session data.

Security monitoring and auditing

• Hardware security design: Utilizing hardware SPI bus protocol, IIC interface, etc., to ensure secure transmission and storage of data at the hardware level.

• Security monitoring and auditing: By deploying tools such as the IoT security situational awareness platform, we can conduct status monitoring, behavior auditing, and anomaly analysis on charging piles, promptly detecting and addressing any abnormalities.

• Regular security audits and testing: Continuously monitor and evaluate the security of the system, promptly identify and address potential vulnerabilities.

Charging process management

• Relay adhesion protection: Through specific circuit design and detection methods, the working state of the relay is monitored in real-time. When a relay adhesion fault is detected, protective measures can be taken promptly.

• Charging status monitoring: It can monitor the connection status of the charging cable in real-time and immediately terminate the charging process in case of abnormal connection.

Collaborate with vehicle BMS

• Battery status monitoring: It works in collaboration with the vehicle's Battery Management System (BMS). The BMS monitors key parameters such as battery voltage, current, and temperature in real time. When the battery is fully charged or exhibits abnormalities, the BMS sends a stop charging command to the charging pile's main board, and the charging pile promptly cuts off the power supply.

Safety design and protection

• Shell grounding: The metal shell of the charging pile is reliably grounded to ensure that in the event of an electrical fault, the current can be safely conducted into the ground.

• Waterproof and dustproof design: For the charging pile mainboard installed outdoors or in semi-outdoor environments, it should possess excellent waterproof and dustproof capabilities, utilizing protective measures such as sealing rubber rings and waterproof enclosures.

Other safety measures

• Component quality control: Conduct rigorous quality screening and testing on selected electronic components to ensure stable and reliable performance.

• Emergency stop protection: Set up an emergency stop button. In case of emergency, users or on-site personnel can press the emergency stop button to immediately cut off the power supply of the charging pile.

• Status indication and alarm: The working status and fault information of the charging pile are visually displayed through indicator lights, display screens, etc. In case of abnormal conditions, audible and visual alarm signals are promptly issued.

The operational version of the AC charging pile mainboard from XinCheng Technology, through the above-mentioned comprehensive design and safety measures, can effectively ensure the safety performance of the AC charging pile mainboard, providing safer and more reliable charging services for electric vehicle users.