GB/T 34657.1-2025Interoperability test specifications of electric vehicle conductive charging — Part 1: Supply equipment (English PDF)

20234.3 NB/T 33001 Specification for electric vehicle off-board conductive charger

GB/T 29317 Terminology of electric vehicle charging/battery swap infrastructure GB/T 34658 Conformance test for communication protocols between off-board conductive charger and battery management system for electric vehicle GB/T 41589-2022 In-cable control and protection device for mode 2 charging of electric road vehicles (IC-CPD) GB 44263-2024 Safety requirements for electric vehicle conductive charging system

3.1 Charging interoperability

The ability of power supply equipment of the same or different models and versions to achieve charging interoperability with electric vehicles, through information exchange and process control.

3.2 Charging interoperability test

Tests conducted to verify charging interoperability.

4.1 Test item coding rules

See Figure 1 for the charging interoperability test item coding rules. Among them.

"Positive test" refers to testing activities that verify whether the EV supply equipment can operate as expected, under normal operating conditions;

"Negative test" refers to testing activities that verify whether the EV supply equipment can correctly handle errors, under abnormal or unexpected conditions;

"Interface test" refers to testing activities that verify whether the interoperability between the power plug and the power outlet, and between the vehicle plug and the vehicle outlet, meets the design specifications;

"X" in "Unmated.X" includes but is not limited to power outlet (EVSocket-outlet), power plug (EVPlug), vehicle plug (VehicleConnector), vehicle outlet (VehicleInlet);

"X" in "Initialization.X" includes but is not limited to connection confirmation (Connection&Confirm), charging reservation, self-test (CableCheck), ready (ChargingReady/Pre-charge);

The "X" in "Energy transfer.X" includes, but is not limited to supply mode (SupplyMode), pause charging (PauseCharging), Charging (Charging);

The "X" in "Shutdown.X" includes, but is not limited to normal charging end (ChargingNormal), error charging end (ChargingError), emergency charging end (ChargingEmergency);

The "X" in "Session.X" includes, but is not limited to the entire charging process (Charging).

Figure 1 -- Test item coding rules

4.2 Evaluation criteria

According to Appendix A, the power supply device under test is considered qualified if it meets the requirements for all test items; otherwise, it is considered unqualified.

4.3 Test sequence

The charging interoperability test sequence is shown in Figure 2.

a) The testing organization shall provide documentation demonstrating that the charging connection device configured for the power supply equipment under test complies with the requirements of 5.5.1; the testing organization conducts testing in accordance with the requirements of 6.2.

b) The DC power supply equipment under test shall undergo communication protocol conformance testing for the corresponding system, in accordance with GB/T 34658, followed by DC charging interoperability testing in accordance with the requirements of 6.3.

c) If the AC power supply equipment under test is an AC charging station or an in- cable control and protection device, AC charging interoperability testing shall be conducted in accordance with the requirements of 6.4.

4.4 Voltage and current tolerance requirements

For voltage and current values where the tolerance is not explicitly specified, the allowable tolerance is ±5%.

5.1 Environmental conditions

During each item test period, the test environment shall be relatively stable and conducted under standard atmospheric conditions for measurement and testing, namely.

a) Ambient temperature. +15 °C ~ +35 °C;

b) Relative humidity. 45% ~ 75%;

c) Atmospheric pressure. 86 kPa ~ 106 kPa.

5.2 Power supply conditions

5.2.1 AC power supply

The AC power supply conditions during testing are.

a) Frequency. 50 Hz ± 0.5 Hz;

b) AC power supply voltage. 220 V/380 V, with an allowable deviation of ±5%.

Note. AC power supply is only used for testing in charging mode.

5.2.2 Grid simulator

The grid simulator shall meet the following requirements.

a) Each phase voltage can be independently adjustable and programmable;

b) The frequency can be adjustable and programmable;

c) Electric energy shall be able to flow in both directions;

d) The voltage harmonics on the power supply side connected to the EV power supply equipment (i.e., side A as specified in GB/T 18487.1-2023) shall be less than 50% of the permissible harmonic values specified in GB/T 14549;

e) The current harmonics injected into the grid shall be less than the permissible harmonic values specified in GB/T 14549;

f) The output voltage's fundamental wave deviation shall be less than 0.2% of the AC rated voltage of the EV power supply equipment under test, with the adjustable step size not exceeding the larger of 0.01% of the rated voltage and 0.5 V;

g) The output frequency deviation shall be less than 0.01 Hz, with the adjustable step size not exceeding 0.01 Hz;

h) The response time shall be less than 20 ms;

i) The three-phase voltage imbalance shall be less than 1%; the phase deviation shall 27930.2-2024.

5.5.3 DC Charging interoperability requirements

The vehicle plug, control and pilot circuit, communication protocol used in the DC power supply equipment under test for which this document applies shall meet the following requirements.

a) For Class A systems, the DC power supply equipment shall use the vehicle plug specified in GB/T 20234.3-2023, the control and pilot circuit shall comply with

5.5.4 Pre-test inspection

Before conducting interoperability testing, the power supply equipment under test shall have its internal components secured and external wiring correctly in accordance with specified requirements; the protective grounding terminal shall be reliably grounded.

6.1 Inspection of charging mode and connection method

Test number. TC_AC.EVSE_P_Unmated.X_001, TC_DX.EVSE_P_Unmated.X_001 Test purpose. To verify that the charging mode and connection method used meet the requirements.

Test method and procedures. Visual inspection. Compliance assessment.

- The charging mode used by the power supply equipment shall comply with the corresponding electric vehicle charging mode usage conditions specified in 5.1 of GB/T 18487.1-2023;

- The DC power supply equipment shall use the connection method C (including cable assemblies for connection method C);

- The AC charging station shall use connection method A, B, or C (including cable assemblies for connection method C);

- The onboard control and protection device shall comply with the structural classification requirements specified in 4.2 of GB/T 41589-2022.

6.2 Charging interface interoperability test

6.2.1 Interface structure compatibility test

Test numbers. TC_DX.EVSE_C_Unmated.VehicleConnector_001, TC_DX.EVSE_C_Unmated.VehicleInlet_001, C_AC.EVSE_C_Unmated.EVSocket- outlet_001, TC_AC.EVSE_C_Unmated.EVPlug_001, TC_AC.EVSE_C_Unmated.VehicleConnector_001, TC_AC.EVSE_C_Unmated.VehicleInlet_001 Test purpose. To verify that the charging interface structure design meets interchangeability requirements. Test method and procedures.

a) Use the dedicated gauges specified in B.1 and/or B.2 of Appendix B to inspect the DC charging interface (vehicle plug, vehicle inlet), perform inspections on key dimensions, insertion test, locking mechanism.

b) Use the dedicated gauges specified in B.3 and/or B.4 to inspect the AC charging interface's vehicle plug, vehicle inlet, power plug, power inlet for key dimensions, insertion force, locking mechanism.

c) The insertion and extraction force measured by the dedicated gauges shall not exceed the value specified in the corresponding interface standard. Compliance assessment.

- The DC charging interface (vehicle plug, vehicle socket) used in Class A and Class C systems shall be able to plug into and effectively lock (mechanically lock) the corresponding gauge. After adding a mechanical lock gasket to the vehicle plug gauge, the S switch shall be disconnected when plugged in.

- The DC charging interface (vehicle plug, vehicle socket) used in Class B systems shall be able to plug into and effectively lock the corresponding gauge.

- The AC charging interface (vehicle plug, vehicle socket, power plug, power socket) shall be able to plug into and effectively lock the corresponding gauge. After adding a mechanical lock gasket to the vehicle plug gauge, the S3 switch shall be disconnected when plugged in. ......