GB/T 27930-2023 English PDF (GBT27930-2023)

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GB/T 27930-2023: Digital communication protocols between off-board conductive charger and electric vehicle
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 GB/T 18487.1-2023, GB/T27930-2023, and GB/T 20234.4-2023. 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 and 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 and
discharger using charging mode 4 and the electric vehicle. It also applies to the
communication -- between the charger or charger and 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 and 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 P...