QC/T 1205.4-2024General battery swap platform for battery electric passenger vehicles - Part 4: Communication between battery pack and facilities (English PDF)

Foreword

This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document is Part 4 of QC/T 1205 All-electric passenger vehicle power exchange platform. The following parts have been released under QC/T 1205:

-- Part 4: Communication between battery pack and facilities.

1 Scope

This document specifies the requirements for communication between battery packs and facilities of all-electric passenger vehicles based on the Controller Area Network (CAN) at the physical layer, data link layer and application layer.

This document applies to the communication between the swappable battery pack for all-electric passenger vehicle and the battery swap infrastructure.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB/T 19596, Terminology of electric vehicles

GB/T 27930-2015, Communication protocols between off-board conductive charger and battery management system for electric vehicle

GB/T 29317, Terminology of electric vehicle charging/battery swap infrastructure

GB/T 29772-2013, General requirements of electric vehicle battery swap station

GB/T 32895-2016, Communication protocols for power cabin of electric vehicle

ISO 11898-1, Road vehicles - Controller area network (CAN) - Part 1: Data link layer and physical signaling

ISO 11898-2, Road vehicles - Controller area network (CAN) - Part 2: High-speed medium access unit

ISO 14229-1:2013, Road vehicles - Unified diagnostic services (UDS) - Part 1: Specification and requirements

SAE J1939-11, Recommended practice for serial control and communication vehicle network - Part 11: Physical layer, 250 kbits/s, twisted shielded pair

3 Terms and definitions

4 General

4.1 According to the requirements of 4.2 in GB/T 29772-2013, the battery swap station may include: charging equipment, battery box replacement equipment, battery box storage equipment, battery box transfer equipment, vehicle guidance system, battery testing and maintenance equipment, monitoring room, distribution room, safety protection facilities, driveway, parking space, business room and other auxiliary facilities.

4.2 The battery swap station and the battery management system are electrically connected through the battery box connector.

4.3 The communication between the battery swap station (battery swap infrastructure) and the battery pack (battery management system) shall include communication of charging functions and other functions.

4.4 The charging equipment and the battery management system of the battery swap station are based on the communication protocol specified in GB/T 27930 for communication of charging function, and the battery management system supports the communication protocol specified in GB/T 32895-2016 for communication of other functions. This communication mode is defined as Mode 1.

4.5 The charging equipment and the battery management system of the battery swap station do not use the communication protocol specified in GB/T 27930 for communication of charging function; instead, they use CAN standard frames or customized charging interaction processes. This communication mode is defined as Mode 2.

4.6 During the charging process, the charger and battery management system shall monitor parameters such as voltage, current and temperature. At the same time, the battery management system shall manage the entire charging process according to the charging control algorithm.