GB/T 27930-2023 PDF English (GB/T 27930-2015: Older version)

GB/T27930-2023 (GBT27930-2023): PDF in English

GB/T 27930-2023 ChaoJi-1 (Chinese standard GB/T) and compatible CHAdeMO-3.1 (Japanese standard, joint-development with Chinese standard) are consisted of 3 standards. It is suitable for high, medium and low power charging (up to 1.2MW) to meet the needs of safe and fast electric-vehicle charging. GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 29.200 CCS K 81 Replacing GB/T 27930-2015 Digital communication protocols between off-board conductive charger and electric vehicle ISSUED ON: SEPTEMBER 07, 2023 IMPLEMENTED ON: APRIL 01, 2024 Issued by: Status Administration for Market Regulation. Standardization Administration of PRC. Table of Contents Foreword ... 4 1 Scope ... 7 2 Normative references ... 7 3 Terms and definitions ... 8 4 Abbreviations ... 13 5 General principles of category A systems ... 13 6 Category A system physical layer ... 14 7 Category A system data link layer ... 14 8 Category A system application layer ... 15 9 Overall charging process of category A system... 16 10 Message classification of category A system ... 17 11 Message format and content of category A system ... 20 12 General principles of category B systems ... 37 13 Physical layer of category B system ... 39 14 Data link layer of category B system ... 39 15 Transport layer of category B system ... 48 16 Application layer of category B system ... 62 17 Timeout of category B system ... 69 Appendix A (Normative) Communication process of category A system ... 70 Appendix B (Informative) Start sending conditions and end sending conditions of category A system message ... 79 Appendix C (Normative) Function negotiation function module ... 81 Appendix D (Normative) Parameter configuration function module ... 87 Appendix E (Normative) Authentication function module ... 93 Appendix F (Normative) Reservation function module ... 104 Appendix G (Normative) System self-check function module ... 117 Appendix H (Normative) Power supply mode function module ... 123 Appendix I (Normative) Precharge and energy transfer function module ... 137 Appendix J (Normative) Service statistics function module ... 160 Appendix K (Informative) Realization of basic charging application scenarios ... 163 Appendix L (Informative) Realization of charging & discharging application scenarios ... 165 Appendix M (Normative) Parameter type table ... 168 Appendix N (Informative) Realization of adaptor communication ... 173 Digital communication protocols between off-board conductive charger and electric vehicle 1 Scope This document specifies the definitions and requirements of the controller area network (CAN)-based communication physical layer, data link layer, transport layer, application layer, between the off-board conductive charger's (hereinafter referred to as "charger") equipment communication controller (SECC) and electric vehicle communication controller (EVCC). This document applies to the communication -- between the charger or the charger & discharger using charging mode 4 and the electric vehicle. It also applies to the communication -- between the charger or charger & discharger and the electronic control unit of the electric vehicle with charging control function. Electric vehicle communication controllers include but are not limited to battery management systems (BMS), as well as in-vehicle systems that need to communicate with the charger to achieve other special functions. Chapters 5 ~ 11 of this document apply to the charging system, which is specified in Appendix B of GB/T 18487.1-2023 (hereinafter referred to as “category A system"). Chapters 101 ~ 106 apply to the charging system, which is specified in Appendix C of GB/T 18487.1-2023, as well as the charging & discharging system, which is defined in Appendix E (hereinafter referred to as "category B system"). "Vehicle" in this document specifically refers to “electric vehicle”. 2 Normative references The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, for dated reference documents, only the version corresponding to the date applies to this document; for undated reference documents, the latest version (including all amendments) applies to this document. GB/T 18487.1-2023 Electric vehicle conductive charging system - Part 1: General requirements GB/T 19596 Terminology of electric vehicles GB/T 29317 Terminology of electric vehicle charging/battery swap infrastructure Extended vehicle identification number; EVIN Vehicle identification number (VIN code), or a vehicle identifier with the words I, O, Q designed, to identify vehicle identity information. Note: Standards related to extended vehicle identification numbers are under consideration. 4 Abbreviations The following abbreviations apply to this document. LM_ACK: Long message acknowledgement LM_EndofACK: Long message end of acknowledge LM_NACK: Long message negative acknowledge RM_SM_ACK: Reliable short message acknowledge 5 General principles of category A systems 5.1 The communication network between the charger and the vehicle is based on CAN2.0B. 5.2 The CAN communication network, between the charger and the vehicle, shall be composed of two nodes: the charger and the vehicle. In order to achieve the compatibility solution of Appendix G of GB/T 18487.1-2023, adaptor nodes can be added to the communication network; however, between each node, there shall be no conflicts in addresses, PGNs, etc. 5.3 Data information transmission adopts the format of low byte sent first. 5.4 The current value during vehicle charging is negative. In public stations, when the vehicle/charger receives a charging current value, which is outside the range of -400 A ~ 0 A, the charging process shall be exited. In private stations, the charger and vehicle can be subject to the negotiation, according to private agreement. 5.5 In public stations, messages not specified in this document shall not appear on the communication network, between chargers and vehicles. Messages, which are not specified in this document and received by the charger or vehicle, will not be processed. 5.6 The conversion relationship between the data value and the physical quantity in the message is: physical quantity = Resolution × Data value + Offset. 5.7 Chargers and vehicles, that implement this document, shall have forward compatibility. data packet, based on PGN. 8.3 Use periodic sending and event-driven methods to send data. 8.4 If multiple PGN data need to be sent to implement a function, all the defined multiple PGN messages must be received, to determine whether the function is successfully sent. 8.5 When defining a new parameter group, try to put parameters with the same function, parameters with the same or similar transmission cycle, parameters belonging to the same subsystem in the same parameter group. At the same time, the new parameter group must make full use of the data width in 8 bytes; try to put related parameters in the same group; consider extendibility; reserve some bytes or bits for future modifications. 8.6 When modifying the parameter group defined in Chapter 10, the newly added parameters must be related to the original parameters in the parameter group. Irrelevant parameters shall not be added to the defined PGN in order to save the number of PGN. 8.7 Parameter options are divided into mandatory items and optional items. The mandatory item parameters shall send actual data, according to the format specified in this document. Optional item parameters can send actual data, according to the format specified in this document, OR all bits shall be filled with 1 and sent. For all contents in the same message which are optional. the sender does not need to send the message. If it is sent, the actual data shall be sent in the format specified in this document. The optional item parameters that do not send the actual data are filled with 1. 8.8 The message shall be sent according to the length specified in this document; the undefined bits in the specified length shall be filled with 1. 8.9 "Untrusted status" is content sent in order to maintain the communication link, when the sender cannot obtain or clarify the current status. The receiver shall ignore and not process the information. 9 Overall charging process of category A system The entire charging process includes six phases: physical connection completion, low- voltage auxiliary power-on, charging handshake phase, charging parameter configuration phase, charging phase, charging end phase, as shown in Figure 1. After the physical connection and the low-voltage auxiliary power-on is completed, the two parties start communication. At each phase of communication, if the charger and the vehicle do not receive each other's message OR do not receive the correct message within the specified time, it is determined to be timeout (timeout means that the other party's complete data packet or correct data packet is not received within the specified time), the communication process shall comply with the requirements of Appendix A. < 00>: = The charger temperature is normal; < 01>: = The charger is overtemperature; < 10>: = Untrusted status; Bits 3 ~ 4: Charging connector failure < 00>: = Charging connector is normal; < 01>: = Charging connector fault; < 10>: = Untrusted status; Bits 5 ~ 6: Charger internal over-temperature fault < 00>: = The internal temperature of the charger is normal; < 01>: = The internal of the charger is overtemperature; < 10>: = Untrusted status; Bits 7 ~ 8: The required power cannot be transferred < 00>: = Power transmission is normal; < 01>: Power cannot be transmitted; < 10>: = Untrusted status; Bits 9 ~ 10: Charger emergency stop failure < 00>: = Normal; < 01>: = Charger emergency stop; < 10>: = Untrusted status; Bits 11 ~ 12: Other faults < 00>: = No.......
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