GB/T 34658-2025Conformance test for communication protocols between off-board conductive charger and battery management system for electric vehicle (English PDF)

20234.3 Protocol implementation extra information for testing

Additional information on the implementation related to conformance testing of a given protocol specification.

[Source. GB/T 17178.1-1997, 3.3.81]

3.12 Test case

An abstract or executable specification.

[Source. GB/T 17178.1-1997, 3.3.107, modified]

3.13 Test laboratory

An organization that performs conformance testing.

[Source. GB/T 17178.1-1997, 3.3.113, modified]

5.1 Test objective

Protocol conformance testing is to verify whether the IUT meets the requirements of GB/T 27930-2023 or GB/T 27930.2-2024, that is, to verify the degree of conformity of the IUT in protocol implementation with the standard.

5.2 Test architecture

5.2.1 Reference model

The reference model of the protocol conformance test system is shown in Figure 1.

5.2.2 Abstract test suite

The abstract test suite specified in this document is a collection of abstract test cases covering all technical requirements of GB/T 27930-2023 and GB/T 27930.2-2024.

5.2.3 Static documentation

Static documentation includes PICS and PIXIT. PICS shall be provided by the IUT provider, outlining the capabilities implemented by the IUT and the implementation of options and add-ons; PIXIT shall include all information related to the IUT and its test environment (except for the information provided in PICS).

Static document templates for Class A systems are detailed in Appendix A; for Class B systems, in Appendix B; for Class C systems, in Appendix C.

5.2.4 Executable test suite

The test cases specified in this document are abstract test cases. The testing laboratory shall combine the parameters and additional information provided in the static documentation, to screen and organize the abstract test cases into executable test cases, finally assemble them into an executable test suite for testing.

5.2.5 Implementation under test (IUT)

The IUT is a product conforming to the CAN physical layer, data link layer, transport layer (Class B and Class C systems), application layer as specified in GB/T 27930-2023 or GB/T 27930.2-2024.

The IUTs specified in this document include Class and Class B systems as specified in GB/T 27930-2023, as well as SECC and EVCC of Class C systems as specified in GB/T 27930.2-2024.

5.3 Test procedure

The protocol conformance test procedure is shown in Figure 2.Test preparation includes completing the static documentation and setting up the test system. The PICS and PIXIT files are jointly completed by the IUT provider and the testing laboratory.

The testing laboratory generates executable test cases, based on the content of the static documents and the abstract test cases specified in this document (see Appendixes D, E, F). A test report is generated after the tests are completed.

Figure 2 -- Protocol conformance testing flow

5.4 Test content classification

Test content includes the following three categories.

a) Required. Test content declared in the PICS file that the IUT shall possess;

conformance testing shall be performed.

b) Negative tests. Test cases to verify the IUT response under abnormal communication conditions.

Tests should preferably be performed in order from positive tests to negative tests, and from simple to complex.

5.6 Other requirements

5.6.1 Time error requirements of communication message

The message timeout and periodicity error requirements for IUT communication shall comply with the provisions of Table 1.

5.6.2 Requirements for Class A system

Class A system IUTs shall meet the following requirements.

a) For operations not explicitly specified in GB/T 27930-2023, the IUT's processing method shall meet security requirements;

b) During communication, after the current message reaches the termination condition, the IUT shall stop sending the message within 500 ms;

c) In the negative test, the test system will send a message that is contradictory to a certain message type definition. The "contradictory" content shall include message priority, reserved bits, data page, PDU format, destination address, source address;

d) When the IUT receives a message whose required parameters do not conform to the data field definition range, it shall ignore the message content, until the message times out;

e) When the current value of the BCP, CML, or BCL message received by the IUT is outside the range of -400 A ~ 0 A, the charging process shall be terminated.

5.6.3 Requirements for Class B systems

Class B system IUTs shall meet the following requirements.

a) The chargers and vehicles containing the SECC and EVCC shall perform the charging suspension procedure, according to the requirements of C.4.9, C.4.10, C.4.11 in GB/T 18487.1-2023.The suspension message shall meet the requirements of Tables 59 and M.3 in GB/T 27930-2023;

b) When the IUT receives a message whose required parameters do not conform to the data field definition, it shall ignore the message content until the message times out.

5.6.4 Requirements for Class C system

Class C system IUTs shall meet the following requirements.

a) During the suspension process, the charger and vehicle shall confirm the termination exit method according to Table L.4 of GB/T 27930.2-2024.The corresponding exit method shall be in accordance with Appendix K of GB/T 27930.2-2024 and GB/T 18487.5-2024, meanwhile it shall meet the security requirements;

b) During communication, after the current message reaches the transmission suspension condition, the IUT shall stop sending the message within 1 second.

6.1 Physical layer

During the information interaction between the test system and the IUT, CAN communication messages are collected using instruments such as a CAN analyzer and oscilloscope. The IUT physical layer shall meet the requirements of Chapter 6 of GB/T 27930-2023; the test cases shall conform to the provisions of Table 2. ......