GB 44263-2024Satety requirements for electric vehicle conductive charging system (English PDF)

5.1.1 Mode 1 specified in

5.1 of GB/T 18487.1-2023 shall not be used to charge electric vehicles.

5.1.2 When the power supply side uses a 10 A (AC) single-phase two-pole grounded plug that complies with the requirements of GB/T 2099.1 and GB 1002, the output current shall not exceed 8 A (AC).

5.2 Prerequisites for the implementation of this document The prerequisite for the implementation of this document is that the power supply equipment shall comply with the provisions of GB 39752 and the electric vehicle shall comply with the provisions of GB 18384.

6.2 Charging interface temperature protection function

6.2.1 AC charging interface temperature protection function The AC charging interface has the following temperature protection functions.

6.2.2 DC vehicle interface temperature protection function The DC vehicle interface has the following temperature protection functions.

7.1 System design safety

7.1.1 Control pilot circuit The AC power supply system has a control pilot function.

7.1.2 Charging cable current carrying capacity detection function Electric vehicles shall have the ability to confirm the rated capacity of the charging cable, by monitoring whether the resistance value between testing point 3 and PE complies with Table A.5 in GB/T 18487.1-2023.

7.1.3 Equipment power supply capacity declaration function The AC power supply equipment shall be able to inform the electric vehicle of the current power supply capacity, by setting the PWM signal duty cycle. The relationship between the duty cycle generated by the AC power supply equipment and the charging current limit shall comply with the requirements of Table A.2 in GB/T 18487.1-2023.

7.1.5 Contact sticking detection function The AC power supply equipment shall have a contactor (or similar device) sticking detection function. When the following contact sticking occurs, the AC power supply equipment shall issue an alarm message at the end of shutdown.

7.1.6 Short circuit protection function The AC power supply equipment shall have a short circuit protection function for the AC output circuit.

7.2 Abnormal charging protection

7.2.4 Vehicle side CP circuit abnormality protection During the energy transmission stage, the electric vehicle shall be able to periodically monitor the PWM signal of testing point 2, to determine the connection status of the vehicle interface. When the PWM signal is interrupted, the electric vehicle shall stop charging and comply with the provisions of A.3.10.4 in GB/T 18487.1-2023.

7.2.5 Power supply network power failure protection During the energy transmission stage, within 1 s after the power supply network is powered off, the voltage value measured between the power lines of the output terminals of the AC power supply equipment or between the power lines and the protective grounding conductor shall be less than or equal to 30 V (AC) (effective value), or the equivalent stored electrical energy shall be less than or equal to

0.2 J.

7.2.6 Output overcurrent protection During the energy transmission stage, the AC power supply equipment shall continuously detect the actual working current of the on-board charger, which shall not exceed the maximum power supply current corresponding to the PWM signal of the AC power supply equipment and the maximum carrying capacity of the power supply equipment components (such as relays and cables).

8.1 System design safety

8.1.1 Control pilot circuit The DC power supply system has control pilot functions.

8.1.2 Short-circuit protection function Electric vehicles and DC power supply equipment shall have short-circuit protection function for the DC power supply circuit. When a short-circuit fault is detected in the DC circuit, the DC power supply equipment shall trigger a fault shutdown and issue an alarm signal.

8.1.3 Capacitive coupling For DC power supply equipment with a rated output voltage not exceeding 500 V (DC), the total capacitance between the DC output positive and negative poles and the ground of each charging interface shall not be greater than 0.5 µF.

8.1.4 Discharge circuit The DC power supply equipment shall be equipped with a discharge circuit. During the insulation self-test stage or when charging is terminated, the DC power supply equipment shall discharge the charging output voltage in time.

8.1.5 Insulation monitoring function During the insulation self-check stage, the DC power supply equipment shall have the function of insulation monitoring of the DC power supply circuit. During the energy transmission stage, the DC charging system shall have the function of insulation monitoring of the DC power supply circuit. The insulation monitoring function of the DC power supply equipment shall be coordinated with the insulation monitoring function of the electric vehicle.

8.1.6 Interface locking function During the energy transmission stage, the vehicle interface shall have a locking device to ensure the reliable connection between the vehicle plug and the vehicle socket, to avoid accidental live disconnection between the DC power supply equipment and the electric vehicle. The locking function shall comply with the provisions of

10.6.2 in GB/T 18487.1-2023.

8.2 Charging abnormality protection

8.2.1 Communication timeout protection During the charging process, when the communication message times out (including communication line short circuit fault, circuit break fault, etc.), the electric vehicle and the DC power supply equipment shall trigger a fault shutdown.

8.2.2 Vehicle-side CC1 circuit abnormality protection For a DC charging system that uses a GB/T 20234.3 vehicle interface and whose control pilot circuit complies with Appendix A, during the energy transmission stage, the electric vehicle shall judge the connection status of the vehicle plug and the vehicle socket by the voltage value of testing point 3 (CC1 circuit). When the vehicle interface changes from fully connected to unreliable connection, the electric vehicle shall trigger an emergency shutdown and disconnect the DC disconnect devices K5 and K6 within 300 ms.

8.2.8 Output overcurrent protection During the energy transmission stage, when the DC power supply device detects that the charging current at the vehicle interface exceeds the required value, it shall trigger a fault shutdown or emergency shutdown; issue an alarm message. The vehicle interface voltage shall drop below 60 V (DC) before the electronic lock is unlocked.

8.2.9 Load dump protection During the energy transmission stage, the DC power supply equipment shall have the ability to limit instantaneous voltage overshoot during load dump (such as load shedding).

9.2 Test conditions

9.2.1 Test environment conditions All tests are carried out under standard atmospheric conditions for measurement and testing. During the test of each item, the test environment conditions shall be relatively stable.

9.2.2 Test power supply conditions The power supply conditions during the test are as follows:

9.2.3 Test instrument requirements Unless otherwise specified, the instruments used in the test shall meet the following requirements.