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
純電動乘用車換電通用平臺第4部分:電池包與設施的通信
1 范圍
本文件規定了純電動乘用汽車電池包與設施之間基于控制器局域網(Controller Area Network,以 下簡稱CAN) 的通信物理層、數據鏈路層及應用層的通信要求。
本文件適用于純電動乘用車換電用電池包與換電設施之間的通信。
2 規范性引用文件
下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中,注日期的引用文 件,僅該日期對應的版本適用于本文件;不注日期的引用文件,其最新版本(包括所有的修改單)適用于 本文件。
GB/T19596 電動汽車術語
GB/T 27930—2015 電動汽車非車載傳導式充電機與電池管理系統之間的通信協議
GB/T 29317 電動汽車充換電設施術語
GB/T 29772—2013 電動汽車電池更換站通用技術條件
GB/T 32895—2016 電動汽車快換電池箱通信協議
ISO 11898-1 道路車輛 控制器局域網絡(CAN) 第1部分:數據鏈路層和物理信令 [Road ve- hicles—Controller area network(CAN)—Part 1:Data link layer and physical signaling]
ISO 11898-2 道路車輛 控制器局域網絡(CAN) 第2部分:高速媒體訪問層 [Road vehicles— Controller area network(CAN)—Part 2:High-speed medium access unit]
ISO 14229-1:2013 道路車輛 通用診斷服務(UDS) 第1部分:診斷規范和需求 [Road vehi- cles—Unified diagnostic services(UDS)—Part 1:Specification and requirements]
SAE J1939-11 商用車控制系統局域網通信協議 第11部分:物理層、250 kbit/s、屏蔽雙絞線 (Recommended practice for serial control and communication vehicle network-Part 11:Physical layer,250 kbits/s,twisted shielded pair)
SAE J1939-81 商用車控制系統局域網通信協議 第81部分:應用層 網絡管理 [Recommended practice for serial control and communication vehicle network-Part 81:Application layer—Network Management]
3 術語和定義
GB/T19596 和 GB/T 29317界定的以及下列術語和定義適用于本文件。
3.1
動力蓄電池 traction battery
為電動汽車動力系統提供能量的蓄電池。
[來源:GB/T 19596—2017,3.3.1.1.1.1]
3.2
蓄電池管理系統 battery management system;BMS
監視蓄電池的狀態(溫度、電壓、荷電狀態等),可以為蓄電池提供通信、安全、電芯均衡及管理控 制,并提供與應用設備通信接口的系統。
[來源:GB/T 19596—2017,3.3.2.1.10]
3.3
換電電池包 swappable battery pack
通常包括蓄電池組、蓄電池管理系統、快換動力蓄電池箱及相應附件(冷卻部件、連接線纜等),具有 從外部獲得電能并可對外輸出電能的單元。
3.4
電池更換站 battery swap station
為電動汽車提供電池更換服務的場所。
注:又稱換電站。
[來源:GB/T29317—2021,3.1.2.1]
3.5
電池更換系統 battery swap system
實現電動汽車動力蓄電池更換的機械設備和電氣設備組成的系統。
[來源:GB/T29317—2021,8.1]
3.6
電池箱存儲架 battery pack storage rack
用于集中承載電池箱的設備。
[來源:GB/T 29317—2021,8.1.5]
3.7
鎖電 battery lock
通過空中下載技術(OTA) 或軟件升級等措施更改電池管理參數,如調整電池系統充電電壓限值、 可用電量(SOC) 使用區間、電池充放電功率限值等,來控制電池可攜帶的電量和保護電池的手段。
3.8
CAN數據幀 CAN data frame
以幀起始(SOF) 開始,幀結束(EOF) 結尾,用于傳輸數據的CAN 協議所必需的有序位域。
3.9
標識符 identifier
CAN 仲裁域的標識部分。
3.10
標準幀 standard frame
CAN2.0B 規范中定義的使用11位標識符的CAN 數據幀。
3.11
擴展幀 extended frame
CAN2.0B 規范中定義的使用29位標識符的CAN 數據幀。
3.12
診斷故障碼 diagnostic trouble code
在線診斷系統中用來識別故障條件的通用數字標識符。
3.13
參數組編號 parameter group number;PGN
用于唯一標識一個參數組的24位值。
[來源:GB/T 27930—2015,3.9,修改]
4 總則
4.1 按照GB/T 29772—2013中4.2的要求,換電站可包括:充電設備、電池箱更換設備、電池箱存儲設 備、電池箱轉運設備、車輛導引系統、電池檢測與維護設備、監控室、配電室、安全防護設施、行車道、停車 位、營業室以及其他輔助設施。
4.2 換電站與電池管理系統通過電池箱連接器進行電氣連接。
4.3 換電站(換電設施)與電池包(電池管理系統)之間的通信,應包括充電功能的通信和其他功能的 通 信 。
4.4 換電站的充電設備與電池管理系統之間根據GB/T 27930 規定的通信協議進行充電功能的通 信,并且電池管理系統支持GB/T 32895—2016定義的通信協議進行其他功能的通信,此種通信模式定 義為模式1。
4.5 換電站的充電設備與電池管理系統之間不采用GB/T 27930 規定的通信協議進行充電功能的通 信,采用CAN 標準幀或自定義充電交互流程,此種通信模式定義為模式2。
4.6 在充電過程中,充電機與電池管理系統應監測電壓、電流和溫度等參數,同時電池管理系統應根據 充電控制算法管理整個充電過程。
4.7 換電電池包內,正的電流值代表放電,負的電流值代表充電。
4.8 換電電池包應能識別電池包在車上或在換電站內,并且在換電站內的電池包應關閉與整車通信相 關的故障診斷。