GB/T 32895-2025 PDF English
US$1005.00 · In stock · Download in 9 secondsGB/T 32895-2025: Communication protocols for swapping battery pack of electric vehicle Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 32895: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 32895-2025 | English | 1005 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Communication protocols for swapping battery pack of electric vehicle
| Valid |
| GB/T 32895-2016 | English | 150 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Communication protocols for swapping battery pack of electric vehicle
| Valid |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 32895-2025
GB/T 32895-2025: Communication protocols for swapping battery pack of electric vehicle---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT32895-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.200
CCS K 81
Replacing GB/T 32895-2016
Communication protocols for swapping battery pack of
electric vehicle
Issued on: FEBRUARY 28, 2025
Implemented on: SEPTEMBER 01, 2025
Issued by. State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 General... 9
5 Physical layer... 10
6 Data link layer... 11
7 Application layer... 13
8 Overall communication process... 13
9 CAN message... 17
10 Interchangeability requirements... 17
Appendix A (Informative) Charging CAN message... 18
Appendix B (Informative) Monitoring CAN message... 42
Appendix C (Informative) Battery pack network topology diagram... 82
Appendix D (Informative) Battery pack address configuration... 83
Appendix E (Informative) Process requirements for battery pack at battery swap station
... 84
Appendix F (Informative) Start and end conditions for charging CAN message... 85
References... 87
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document replaces GB/T 32895-2016 "Communication protocols for swapping
battery pack of electric vehicle". Compared with GB/T 32895-2016, in addition to
editorial changes, the main technical changes are as follows.
a) CHANGE the CAN bus description (see 4.1; 4.1 of the 2016 edition);
b) ADD the requirements for the battery pack and the battery swap station to use
charging CAN and monitoring CAN (see 4.2 and 4.3);
c) ADD the CAN FD communication rate requirements and communication
architecture requirements (see Chapter 5);
d) ADD and CHANGE the overall communication process requirements (see
Chapter 8; Chapter 8 of the 2016 edition);
e) ADD the charging CAN message, which replaces the original message
classification and message format and content requirements; ADD the battery
swap station query of battery pack information, charge and discharge state,
battery pack code, BMS software version, BMS hardware version, battery pack
communication protocol version; ADD the message format of battery pack
mileage information, battery pack control action response, charging termination
information, battery swap station charging data, battery pack liquid cooling
system information, charge and discharge state (see Appendix A; Chapter 9 and
Chapter 10 of the 2016 edition);
f) ADD the battery pack information query at battery swap station (see Appendix
A.2.1);
g) ADD the basic information message classification requirements, including battery
pack code, BMS software version, BMS hardware version, battery pack
communication protocol version, battery pack mileage information (see
Appendix A.2.2.1; 9.1 of the 2016 edition);
h) ADD the classification requirements of operation data messages, including battery
pack control action response, charging termination information, battery swap
station charging data, liquid cooling system information (see Appendix A.2.2.2;
9.2 of the 2016 edition);
i) DELETE the maintenance message (see 9.3 of the 2016 edition);
Communication protocols for swapping battery pack of
electric vehicle
1 Scope
This document specifies the communication physical layer, data link layer, application
layer, overall communication process, CAN message, interchangeability requirements
of the swapping battery pack of electric vehicle (hereinafter referred to as "battery
pack"), based on the controller area network (CAN2.0/CAN FD).
This document applies to the communication between the battery pack and the charging
system of the battery swap station (hereinafter referred to as "battery swap station").
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. Among them, for reference documents with
dates, only the versions corresponding to the dates apply to this document; for reference
documents without dates, the latest versions (including all amendments) apply to this
document.
GB/T 19596 Terminology of electric vehicles
GB/T 27930 Digital communication protocols between off-board conductive
charger and electric vehicle
GB/T 29317 Terminology of electric vehicle charging/battery swap infrastructure
ISO 11898-1 Road vehicles - Controller area network (CAN) - Part 1.Data link
layer and physical coding sublayer
ISO 11898-2 Road vehicle - Control area network (CAN) - Part 2.High-speed
physical medium attachment (PMA) sublayer
ISO 11898-5 Road vehicles - Controller area network (CAN) - Part 5.High-speed
medium access unit with low-power mode
SAE J1939-11 Recommended practice for serial control and communication vehicle
network - Part11.Physical layer-250 kbits/s, twisted shielded pair
SAE J1939-73.2006 Recommended practice for serial control and communication
vehicle network - Part 73.Application layer - Diagnostics)
the battery; provides a communication interface with the application equipment.
4 General
4.1 The battery pack communication interface adopts CAN bus (including. CAN2.0 and
CAN FD), which is compatible with the communication network of the road vehicle
control system, including.
a) The CAN communication interface between the charging device and the BMS
(hereinafter referred to as "charging CAN"), whose communication network is
based on CAN2.0B and uses extended frame requirements;
b) The CAN communication interface between the vehicle management system and
the BMS (hereinafter referred to as "monitoring CAN"), whose communication
network is based on CAN bus (including. CAN2.0 and CAN FD), using standard
frames or extended frames.
4.2 When the charging CAN is used for communication interaction between the battery
pack and the battery swap station, the message meets the requirements of 9.1; when the
monitoring CAN is used for communication interaction between the battery pack and
the battery swap station, the message meets the requirements of 9.2.
4.3 The message format and content of charging CAN and monitoring CAN shall meet
the relevant provisions of Appendix A and Appendix B.
4.4 After the battery pack is physically connected in the battery swap station and the
BMS auxiliary power is powered on and awakened, it shall include two states. static
monitoring state and charging and discharging state. The state transition of the battery
pack in the battery swap station is shown in Figure 1.
4.5 Data transmission adopts the format of sending the low bit first. The positive current
value represents discharge, whilst the negative current value represents charging.
4.6 The communication model between the battery pack and the battery swap station is
divided into the physical layer, the data link layer, the application layer.
4.7 The battery pack can be used in combination of one box or multiple boxes. The
network topology diagram is shown in Appendix C.
5 Physical layer
5.1 General requirements
The physical layer shall comply with the provisions on the physical layer in ISO 11898-
1, ISO 11898-2, ISO 11898-5, SAE J1939-11.The communication rate of CAN2.0 shall
be no less than 250 kbit/s; the control segment of CAN FD shall be no less than 250
kbit/s; the data segment shall be no less than 1 Mbit/s.
5.2 Battery pack communication architecture
5.2.1 The battery pack has two independent communication CANs. one charging CAN
and one monitoring CAN. This method is defined as communication architecture I.
After the battery pack BMS wakes up, the battery pack and the battery swap station in
the communication architecture I enter the static monitoring state and send static state
message information through the monitoring CAN. In the charging and discharging
state, the charging and discharging state message information is sent through the
charging CAN; because the two CAN channels are independent, the monitoring CAN
can continue to send messages in the charging and discharging state. The schematic
diagram of communication architecture I is shown in Figure 2.
5.2.2 The battery pack has charging CAN and monitoring CAN functions through an
independent communication CAN. This method is defined as communication
architecture II. The battery pack and battery swap station under communication
architecture II enter the static monitoring state, after the battery pack BMS wakes up;
sends the static state message information through the CAN channel. If it enters the
charging and discharging state, the charging and discharging state message information
is sent through the CAN channel. The schematic diagram of communication
architecture II is shown in Figure 3.
6.6 Message type
Supports 5 types of messages, namely command, request, broadcast/response,
confirmation, group function. The specific definition complies with the provisions of
message types in GB/T 27930.
7 Application layer
7.1 The application layer adopts the form of parameter and parameter group definition.
7.2 PGN is used to number the parameter group; each node identifies the content of the
data packet according to PGN.
7.3 Use "Request PGN" to actively obtain the parameter group of other nodes.
7.4 Use periodic transmission and event-driven methods to send data.
7.5 If multiple PGN data need to be sent to implement a function, multiple PGN
messages of the definition must be received at the same time, to determine that the
function is sent successfully.
7.6 When defining a new parameter group, try to put parameters with the same function,
parameters with the same or similar refresh frequency, parameters belonging to the
same subsystem in the same parameter group; at the same time, the new parameter
group shall make full use of the 8/64-byte data width, to try to put related parameters
in the same group; meanwhile it shall consider scalability, reserve some bytes or bits
for future modification.
7.7 When modifying the parameter group defined in this document, the definition of
the defined bytes or bits shall not be modified; the newly added parameters shall be
related to the original parameters in the parameter group; irrelevant parameters shall
not be added to the defined PGN to save the number of PGNs.
7.8 The definition of fault diagnosis complies with the requirements of the CAN bus
diagnostic system in 5.1 of SAE J1939-73.2006.
7.9 The single-byte parameter setting of the invalid information unit shall be 0xFF; the
double-byte parameter setting shall be 0xFFFF; the four-byte parameter setting shall be
0xFFFFFFFF.
8 Overall communication process
8.1 Overall state transfer
8.1.1 A brief description of the overall state transfer of the battery pack in the battery
swap station is as follows.
a) After the battery pack enters the battery swap station, the battery swap station
plugs in the power connector for the battery pack to make a physical connection.
After the battery pack BMS auxiliary power is powered on, the BMS is awakened
in the agreed manner. The battery swap station establishes a communication
connection with the battery pack BMS; the battery pack enters the static
monitoring state;
b) In the static monitoring state, the battery swap station needs to communicate and
interact with the battery pack, to monitor the battery pack in the station;
c) In the static monitoring state, if the battery pack needs to be charged or discharged,
the charging and discharging is started according to the process; the battery pack
enters the charging and discharging state;
d) After the charging and discharging is completed, the battery pack re-enters the
static monitoring state when it has not been swapped out of the station;
e) Thereafter, if the battery swap station needs to swap, the dormant battery pack
BMS and auxiliary power need to be powered off; the battery pack enters the
swappable state.
8.1.2 The overall state flow diagram of the battery pack in the battery swap station is
shown in Figure 4.The overall state flow process of the battery pack in the battery swap
station, such as static, charging, battery swapping, is shown in Appendix E.
9 CAN message
9.1 Charging CAN message
Passenger cars or commercial vehicles use the charging CAN channel for
communication interaction, when the battery pack is in static monitoring or charging
and discharging state. The message format and content are shown in Appendix A; the
start and end conditions of message sending are shown in Appendix F.
9.2 Monitoring CAN message
Passenger cars or commercial vehicles use the monitoring CAN channel for
communication interaction when the battery pack is in static monitoring or charging
and discharging state. Passenger cars are based on standard frames; the message format
and content are shown in B.1.Commercial vehicles are based on extended frames; the
message format and content are shown in B.2.
10 Interchangeability requirements
10.1 The battery swap station shall have the ability to identify charging CAN and
monitoring CAN signals; it can be compatible with battery packs that use different CAN
channels to interact with the battery swap station.
10.2 The battery swap station shall have at least 2 CAN channels, which can be
compatible with battery packs using communication architecture I and communication
architecture II.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 32895-2025 be delivered?Answer: The full copy PDF of English version of GB/T 32895-2025 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 32895-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 32895-2025_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 32895-2025 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 32895-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 32895-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 32895-2025?A step-by-step guide to download PDF of GB/T 32895-2025_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 32895-2025".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|