This standard specifies the definitions of physical layer, data link layer and application layer of the Control Area Network (CAN)-based communication between off-board conductive charger (hereinafter referred to as "charger") and battery management system (hereinafter referred to as "BMS") for electric vehicle.
This standard is applicable to the communication between charger and BMS of charging mode 4 specified in GB/T 18487.1 or that between charger and vehicle control units having charging control function.
2 Normative References
The following documents for the application of this document are essential. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendment) applies.
GB/T 19596 Terminology of Electric Vehicles
GB/T 18487.1 Electric Vehicle Conductive Charging System - Part 1: General Requirements
ISO 11898-1:2003 Road Vehicle Control Area Network (CAN) Part 1: Data Link Layer and Physical Signaling
SAE J1939-11:2006 Recommented Practice for Serial Control and Communication Vehicle Network-Part 11: Physical Laycr-250 K bits/s, Twisted Shielded Pair
SAE J1939-21:2006 Recommented Practice for Serial Control and Communication Vehicle Network-Part 21:Data Link Layer)
SAE J1939-73:2006 Recommented Practice for Serial Control and Communication Vehicle Network-Part 73: Application Layer-Diagnostics)
3 Terms and Definitions
For the purposes of this standard, the terms and definitions given in GB/T 19596 AND SAE J1939 and the following apply.
3.1
Frame
Set of consecutive data bits constituting a complete information.
3.2
CAN data frame
Ordered bit fields necessary for the CAN protocol for data transmission, starting from the Start of Frame (SOF) and stopping at the End of Frame (EOF).
3.3
Messages
One or more "CAN data frames" having the same parameter group number.
3.4
Identifier
A symbol which establishes the identity of CAN arbitration field.
3.5
Standard frame
One of CAN data frame which adopts 11-bit identifier defined in CAN 2.0B specifications.
3.6
Extended frame
One of CAN data frame which adopts 29-bit identifier defined in CAN 2.0B specifications.
3.7
Priority
A 3-bit field in identifier to set the arbitration priority during transmission process, with Grade 0 as highest priority and Grade 7 as lowest priority.
3.8
