GB/T 41205.3-2021 Universal platform for battery swapping for pure electric passenger vehicles - Part 4: Communication between battery packs and facilities
1 Scope
This document specifies the communication requirements for the physical layer, data link layer and application layer of communication based on the Controller Area Network (CAN) between battery packs and facilities for pure electric passenger vehicles.
This document is applicable to the communication between battery packs and facilities for battery swapping for pure 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 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 swapping battery pack 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
SAE J1939-81 Recommended practice for serial control and communication vehicle network - Part 81: Application layer - Network management
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 19596 and GB/T 29317 and the following apply.
3.1
traction battery
battery that provides energy for the power system of an electric vehicle
[Source: GB/T 19596-2017, 3.3.1.1.1.1]
3.2
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
[Source: GB/T 19596-2017, 3.3.2.1.10]
3.3
swappable battery pack
unit generally consisting of battery pack, battery management system, swapping traction battery pack and corresponding accessories (cooling component, connecting cable, etc.), which is capable of obtaining external electric energy and outputting electric energy outwards
3.4
battery swap station
facility that provides battery swap services for electric vehicles
Note: It is also referred to as BSS.
[Source: GB/T 29317-2021, 3.1.2.1]
3.5
battery swap system
system consisting of mechanical equipment and electrical equipment for swapping the traction battery of electric vehicle
[Source: GB/T 29317-2021, 8.1]
3.6
battery pack storage rack
device for centrally carrying battery pack
[Source: GB/T 29317-2021, 8.1.5]
3.7
battery lock
means to control the electric quantity carried by the battery and protect the battery through changing the battery management parameters by Over The Air (OTA) technology, software upgrade or other measures, such as the battery management parameters are changed, such as adjusting the charging voltage limit of the battery system, the service range of the State of Charge (SOC), and the charging/discharging power limit of the battery
3.8
CAN data frame
ordered bit fields necessary for the CAN protocol for data transport, starting with the start of frame (SOF) and ending with the end of frame (EOF)
3.9
identifier
identity part of the CAN arbitration field
3.10
standard frame
CAN data frame that adopts a 11-bit identifier, as defined in the CAN 2.0B specifications
3.11
extended frame
CAN data frame that adopts a 29-bit identifier, as defined in the CAN 2.0B specifications
3.12
diagnostic trouble code
universal numeric identifier used to identify fault conditions of online diagnostic system
3.13
parameter group number; PGN
24-bit value that uniquely identifies a parameter group
[Source: GB/T 27930-2015, 3.9, modified]
4 General provisions
4.1 According to the requirements of 4.2 in GB/T 29772-2013, the battery swap station may include: charging equipment, battery pack swap equipment, battery pack storage equipment, battery pack transfer equipment, vehicle guiding system, battery testing and maintenance equipment, monitoring room, power distribution room, safety protection facilities, driveways, 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 pack connector.
4.3 The communication between the battery swap station (battery swap facility) and the battery pack (battery management system) shall include the communication of charging function and other functions.
4.4 The charging function communication is carried out between the charging equipment of the battery swap station and the battery management system according to the communication protocol specified in GB/T 27930. The battery management system supports the communication of other functions according to the communication protocol specified in GB/T 32895-2016. This communication mode is defined as Mode 1.
4.5 CAN standard frame or customized charging interaction process, instead of the charging function communication according to communication protocol specified in GB/T 27930, is adopted between the charging equipment of the battery swap station and the battery management system. 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, and the battery management system shall manage the entire charging process according to the charging control algorithm.
4.7 In the swappable battery pack, the positive current value represents discharging, and the negative current value represents charging.
4.8 The swappable battery pack shall be able to identify that the battery pack is on the vehicle or in the battery swap station, and the battery pack in the battery swap station shall turn off the fault diagnosis related to complete vehicle communication.
Contents Foreword III Introduction IV 1 Scope 2 Normative references 3 Terms and definitions 4 General provisions 5 Network topology 6 Physical layer 7 Data link layer 8 Message format and content Bibliography
GB/T 41205.3-2021 Universal platform for battery swapping for pure electric passenger vehicles - Part 4: Communication between battery packs and facilities
1 Scope
This document specifies the communication requirements for the physical layer, data link layer and application layer of communication based on the Controller Area Network (CAN) between battery packs and facilities for pure electric passenger vehicles.
This document is applicable to the communication between battery packs and facilities for battery swapping for pure 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 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 swapping battery pack 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
SAE J1939-81 Recommended practice for serial control and communication vehicle network - Part 81: Application layer - Network management
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 19596 and GB/T 29317 and the following apply.
3.1
traction battery
battery that provides energy for the power system of an electric vehicle
[Source: GB/T 19596-2017, 3.3.1.1.1.1]
3.2
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
[Source: GB/T 19596-2017, 3.3.2.1.10]
3.3
swappable battery pack
unit generally consisting of battery pack, battery management system, swapping traction battery pack and corresponding accessories (cooling component, connecting cable, etc.), which is capable of obtaining external electric energy and outputting electric energy outwards
3.4
battery swap station
facility that provides battery swap services for electric vehicles
Note: It is also referred to as BSS.
[Source: GB/T 29317-2021, 3.1.2.1]
3.5
battery swap system
system consisting of mechanical equipment and electrical equipment for swapping the traction battery of electric vehicle
[Source: GB/T 29317-2021, 8.1]
3.6
battery pack storage rack
device for centrally carrying battery pack
[Source: GB/T 29317-2021, 8.1.5]
3.7
battery lock
means to control the electric quantity carried by the battery and protect the battery through changing the battery management parameters by Over The Air (OTA) technology, software upgrade or other measures, such as the battery management parameters are changed, such as adjusting the charging voltage limit of the battery system, the service range of the State of Charge (SOC), and the charging/discharging power limit of the battery
3.8
CAN data frame
ordered bit fields necessary for the CAN protocol for data transport, starting with the start of frame (SOF) and ending with the end of frame (EOF)
3.9
identifier
identity part of the CAN arbitration field
3.10
standard frame
CAN data frame that adopts a 11-bit identifier, as defined in the CAN 2.0B specifications
3.11
extended frame
CAN data frame that adopts a 29-bit identifier, as defined in the CAN 2.0B specifications
3.12
diagnostic trouble code
universal numeric identifier used to identify fault conditions of online diagnostic system
3.13
parameter group number; PGN
24-bit value that uniquely identifies a parameter group
[Source: GB/T 27930-2015, 3.9, modified]
4 General provisions
4.1 According to the requirements of 4.2 in GB/T 29772-2013, the battery swap station may include: charging equipment, battery pack swap equipment, battery pack storage equipment, battery pack transfer equipment, vehicle guiding system, battery testing and maintenance equipment, monitoring room, power distribution room, safety protection facilities, driveways, 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 pack connector.
4.3 The communication between the battery swap station (battery swap facility) and the battery pack (battery management system) shall include the communication of charging function and other functions.
4.4 The charging function communication is carried out between the charging equipment of the battery swap station and the battery management system according to the communication protocol specified in GB/T 27930. The battery management system supports the communication of other functions according to the communication protocol specified in GB/T 32895-2016. This communication mode is defined as Mode 1.
4.5 CAN standard frame or customized charging interaction process, instead of the charging function communication according to communication protocol specified in GB/T 27930, is adopted between the charging equipment of the battery swap station and the battery management system. 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, and the battery management system shall manage the entire charging process according to the charging control algorithm.
4.7 In the swappable battery pack, the positive current value represents discharging, and the negative current value represents charging.
4.8 The swappable battery pack shall be able to identify that the battery pack is on the vehicle or in the battery swap station, and the battery pack in the battery swap station shall turn off the fault diagnosis related to complete vehicle communication.
Contents of GB/T 41205.3-2021
Contents
Foreword III
Introduction IV
1 Scope
2 Normative references
3 Terms and definitions
4 General provisions
5 Network topology
6 Physical layer
7 Data link layer
8 Message format and content
Bibliography
