Standard No.:	QC/T 1204.5-2024
English Name:	Compatibility of on-board battery swap system for battery electric passenger vehicles - Part 5 : Communication between electric vehicle and battery pack
Chinese Name:	纯电动乘用车车载换电系统互换性 第5部分：车辆与电池包的通信
Chinese Classification:	T36    Electronic and electrical equipment
Professional Classification:	QC    Professional Standard - Automobile
Source Content Issued by:	MIIT
Issued on:	2024-07-05
Implemented on:	2025-1-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	11500 words
Translation Price(USD):	345.0
Delivery:	via email in 1~5 business day

QC/T 1204.5-2024 Compatibility of on-board battery swap system for battery electric passenger vehicles - Part 5: Communication between electric vehicle and battery pack 1 Scope This document specifies the rules and requirements for communication between electric vehicle and battery pack of battery swap system for battery electric passenger vehicles. This document is applicable to the communication between electric vehicle and battery pack for on-board battery swap system for battery electric passenger vehicles. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 19596 Terminology of electric vehicles GB/T 32960.3 Technical specifications of remote service and management system for electric vehicles - Part 3: Communication protocol and data format GB/T 34014 Coding regulation for automotive traction battery 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 19596 and the following apply. 3.1 battery management system; BMS system capable of monitoring the state (e.g. temperature, voltage and state of charge) of battery and providing communication, safety, cell equalization and management control for battery as well as providing the communication interface with application equipment 3.2 frame set of data bits constituting a complete message 3.3 messages one or more "CAN/CANFD data frames" having the same parameter group number 3.4 available energy energy that can be released from the current battery according to the specified discharge conditions 3.5 insulation resistance equivalent resistance of high voltage system to ground 3.6 electronic control unit; ECU on-board computer composed of microcomputer and peripheral circuit 3.7 diagnostic trouble code; DTC 4-byte value used to identify the type of failure, associated failure mode, and the number of occurrences 3.8 unified diagnostic services; UDS uniform diagnostic service standards performed by ECU with diagnostic function 4 General provisions 4.1 CAN2.0B/CAN FD/wireless communication protocols shall be adopted for the communication network between the electric vehicle and the swappable battery pack BMS. 4.2 The communication between the electric vehicle and the swappable battery pack BMS shall comply with the UDS diagnostic protocol. 4.3 The swappable battery pack BMS shall realize the monitoring and reporting of high voltage insulation resistance. 4.4 The swappable battery pack BMS shall monitor and report the high voltage interlock status. 4.5 The swappable battery pack BMS with battery thermal management function shall realize the temperature monitoring of battery cooling interface. 4.6 Refer to ISO 14229 and ISO 15765 for diagnostic services.

Contents Foreword III Introduction IV 1 Scope 2 Normative references 3 Terms and definitions 4 General provisions 5 Network topology 6 Format and requirements for communication topology message between vehicle and BMS network Annex A (Informational) Format of network management message Bibliography