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GB/T 32895-2016 English PDF (GBT32895-2016)

GB/T 32895-2016 English PDF (GBT32895-2016)

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GB/T 32895-2016: Communication protocols for swapping battery pack of electric vehicle

This Standard specifies the definition of swapping battery pack of electric vehicle (hereinafter referred to as battery pack) basing on the communication physical layer, data link layer and application layer of control area network (CAN).
GB/T 32895-2016
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 29.200
K 81
Communication protocols for
swapping battery pack of electric vehicle
ISSUED ON. AUGUST 29, 2016
IMPLEMENTED ON. MARCH 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 General ... 6
5 Physical layer ... 7
6 Data link layer ... 7
7 Application layer ... 8
8 Overall process of communication ... 9
9 Message classification ... 10
10 Message format and content ... 12
Annex A (informative) Network topology of battery pack ... 26
Annex B (informative) Address configuration of battery pack ... 27
Annex C (informative) Fault diagnosis messages of battery pack ... 28
Bibliography ... 32
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009. This Standard is proposed and under the jurisdiction of China Electricity Council. Main drafting organizations of this Standard. State Grid Corporation, Zhejiang Electric Power Company, China Electric Power Research Institute, XJ Group Co., Ltd., State Grid Electric Power Research Institute, Shanghai Dianba New Energy Technology Co., Ltd., Beijing Automotive Group Co., Ltd., Shanghai Automotive Industry (Group) Corporation, Beijing Pride New Energy Battery Technology Company, CITIC Guoan Mengguli Power Technology Company, Tianjin Power Battery Co., Ltd., CNOOC New Energy Investment Co., Ltd.
Main drafters of this Standard. Su Shengxin, Shen Jianxin, Wu Bin, Ma Jianwei, Chen Feng, Zhang Fan, Yan Weiping, Lin Xiaobin, Li Bin, Zhang Shuangquan, Lian Zhanwei, Chen Xiaonan, Zhao Mingyu, Lv Xianrong, Zhang Jianping, Zhou Jin, Li Haoyu, Li Dandong, Li Panzhong, Wang Yongliang.
Communication protocols for
swapping battery pack of electric vehicle
1 Scope
This Standard specifies the definition of swapping battery pack of electric vehicle (hereinafter referred to as battery pack) basing on the communication physical layer, data link layer and application layer of control area network (CAN).
This Standard applies to communication between the battery pack and the equipment connected to it.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the dated edition cited applies. For undated references, the latest edition of the referenced document (including all amendments) applies.
GB/T 19596-2004 Terminology of electric vehicles
ISO 11898-1.2003 Road vehicle - Control area network (CAN) - Part 1. Data link layer and physical signaling
ISO 11898-2.2003 Road vehicle - Control area network (CAN) - Part 2. High-speed medium access unit
ISO 11898-5.2006 Road vehicles - Control area network (CAN) - Part 5. High-speed medium access unit with low-power mode
SAE J1939-11.2006 Recommended practice for serial control and communication vehicle network - Part 11. Physical layer, 250 Kbits/s, twisted shielded pair SAE J1939-21.2006 Recommended practice for serial control and communication vehicle network - Part 21. Data link layer
SAE J1939-73.2006 Recommended practice for serial control and communication vehicle network - Part 73. Diagnostics
SAE J1939-81.2006 Recommended practice for serial control and communication vehicle network - Part 81. Application Layer - Network Management
data, requests, responses, negative responses, etc.
3.8
parameter group number; PGN
A 24-bit value that uniquely identifies a parameter group. Parameter group numbers include. reserved bits, data pages, PDU format fields (8 bits), group extension fields (8 bits).
3.9
suspect parameter number; SPN
A 19-bit value assigned by the application layer to each parameter via the parameter description signal.
3.10
protocol data unit; PDU
A specific CAN data frame format.
3.11
transport protocol
A portion of the data link layer, providing a mechanism for PGN transmitting data of 9 bytes or more.
3.12
diagnostic trouble code; DTC
A 4-byte value for identifying the trouble type, the associated trouble mode and the number of occurrences.
4 General
4.1 Communication interface of battery pack uses CAN bus, which is compatible with the communication network of road vehicle control system.
4.2 Data transmission uses the format of of the low position being sent first; the positive current value represents discharging; the negative current value represents charging. 4.3 The battery pack can be used in combination of one pack or more. See Annex A for network topology.
It adopts two PDU formats defined in 5.3 of SAE J1939-21.2006. PDU1 format (PS is the destination address) and PDU2 format (PS is the group extension). PDU1 format achieves the transmission from the CAN data frame directed to a specific target address; PDU2 format is used only for the transmission without specifying a specific destination address.
6.4 Transport protocol function
The transport protocol function is used for the transmission of the date of 9 or more bytes. The specific connection initialization, data transmission and connection closure shall follow the specifications about the message transmission in 5.4.7 and 5.10 of SAE J1939-21.2006.
6.5 Address assignment and network management protocol
Network address is used to ensure the uniqueness of the message identifier and to indicate the source of the message. The address of the battery pack according to SAE J1939-81.2006 specification can be service configurable address, command configurable address, single address mode from self-configuration address, or arbitration address mode, which shall follow the network management protocol configuration address specified in SAE J1939-81.2006, see Annex B. The preferred address for the battery pack is shown in Table 2.
Table 2 -- Preferred address assignment of battery pack CAN
Device Address
Battery pack 128(80H)
6.6 Message types
It supports 5 message types, namely, command, request, broadcast/response, acknowledgment and group function. The specific definitions follow the specifications about the message type in 5.4 of SAE J1939-21.2006.
7 Application layer
7.1 The application layer adopts the form defined by parameters and parameter group. 7.2 The parameter groups are numbered using PGN; each node identifies the contents of the data packet according to the PGN.
7.3 It uses ?€?Request PGN?€? to actively acquire the parameter group of other nodes. 7.4 It uses cyclic transmission and event driving to transmit data.
7.5 If more than one PGN data needs to be sent to implement a function, multiple 7 2 bytes 10067
Extremely low voltage value of single battery or battery
module
Resolution. 0.01 V/bit, offset. 0 V, value range. 0 V ~ 24 V
9 2 bytes 10068
Extremely high voltage value of single battery or battery
module
Resolution. 0.01 V/bit, offset. 0 V, value range. 0 V ~ 24 V
11 2 bytes 10069
Extremely-large-deviation voltage value of single battery
or battery module
Resolution. 0.001 V/bit, offset. 0 V, value range. 0 V ~ 24
13 1 byte 10070
Low value of discharge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
14 1 byte 10071
High value of discharge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
15 1 byte 10072
Large-deviation value of discharge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
16 1 byte 10073
Extremely low value of discharge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
17 1 byte 10074
Extremely high value of discharge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
18 1 byte 10075
Extremely-large-deviation value of discharge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
19 1 byte 10076
Low value of charge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
20 1 byte 10077
High value of charge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
21 1 byte 10078
Large-deviation value of charge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
22 1 byte 10079
Extremely low value of charge temperature
Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~
200 ??C
23 1 byte 10080 Extremely high value of charge temperature Resolution. 1 ??C/bit, offset. -50 ??C, value range. -50 ??C ~ byte
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