QC/T 897-2011 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| QC/T 897-2011 | English | 125 |
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Technical specification of battery management system for electric vehicles
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QC/T 897-2011: Technical specification of battery management system for electric vehicles---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/QCT897-2011
QC
Automotive Industry Standard
of the People��s Republic of China
ICS 43.040
E 35
Technical Specification of Battery Management
System for Electric Vehicles
Issued on. DECEMBER 20, 2011
Implemented on. JULY, 2012
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 Requirements... 5
5 Test Method... 10
6 Inspection rules... 18
7 Marking... 20
Annex A (Informative) Typical Charge-discharge Conditions of Battery System
... 21
1 Scope
This Standard specifies the terms and definitions, requirements, test methods,
inspection rules and marking of the battery management system for electric vehicles.
This Standard applies to the power battery management system for electric vehicles.
2 Normative References
The following documents are essential to the application of this standard. For dated
references, only the dated editions apply to this standard. For undated references, the
latest edition (including all amendments) applies to this standard.
GB/T 191-2008 Packaging - Pictorial Marking for Handling of Goods
GB/T 2423.4 Basic Environmental Testing Procedures for Electric and Electronic
Products - Test Db. Damp Heat, Cyclic
GB/T 2423.17 Environmental Testing for Electric and Electronic Products - Part 2.
Test Method-Test Ka. Salt Mist
GB/T 2423.22 Environmental Testing for Electric and Electronic Products - Part 2.
Test Method - Test N. Change of Temperature
GB/T 17619 Limits and Methods of Testing for Immunity of Electrical/ Electronic
Sub-assemblies in Vehicles to Electromagnetic Radiation
GB/T 19596 Terminology of Electric Vehicles
3 Terms and Definitions
For the purpose of this Standard, the following terms and definitions and those defined
in GB/T 19596 apply.
3.1 Battery electronics
It is an electronic device which acquires the data of battery monomers (integrated) or
battery modules (integrated) related to electricity and heat and provides such data for
the battery control unit.
3.2 Battery control unit
It is an electronic control unit which controls or manages the electrical or thermal
performance of the battery system and is capable of information interaction with other
control units in the vehicles.
3.3 Battery management system
It is an electronic device composed of battery electronics and battery control system.
3.4 Battery pack
It is the energy storage unit, including integration of battery monomers or battery
modules, battery electronics, high-voltage circuit, low-voltage circuit, cooling unit and
mechanical assembly.
3.5 Battery system
It is the energy storage unit, including integration of battery monomers or battery
modules, battery management system, high-voltage circuit, low-voltage circuit, cooling
unit and mechanical assembly.
4 Requirements
4.1 General requirements
4.1.1 The battery management system shall be capable of detecting the data of
batteries related to electricity and heat, at least including the parameters such as
voltage of battery monomers or battery modules, current of battery group return circuit
and internal temperature of battery pack.
4.1.5 When the battery management system is used in an electric vehicle with the
plug-in charging function, it shall capable of controlling and managing the charging
process by real-time communication or other signal interaction modes with on-board
or off-board battery charger.
4.2 Technical requirements
4.2.1 Insulation resistance.
The insulation resistance value between the live parts, which are connected with the
battery management system and power battery, and the shell shall not be less than 2
M��.
4.2.2 Insulation voltage withstand performance.
The battery management system shall be capable of withstanding the insulation
withstand voltage test as required by 5.3, without disruptive discharges such as
breakdown or flashover during the test.
4.2.6 Overvoltage operation
The battery management system shall be capable of operating normally at the supply
voltage specified in 5.7, and shall meet the requirements of 4.2.3 for the accuracy for
the measurement of the state parameters.
4.2.7 Undervoltage operation
The battery management system shall be capable of operating normally at the supply
voltage specified in 5.8, and meet the requirements of 4.2.3 for the accuracy for the
measurement of the state parameters.
4.2.12 Resistance to temperature changes
The battery management system shall be capable of withstanding the temperature
change test specified in 5.13, and shall be capable of normal operation after the test,
and shall meet the requirements of 4.2.3 for the accuracy for the measurement of the
state parameters.
4.2.15 Resistance to vibration
The battery management system shall be capable of withstanding the vibration test
specified in 5.16, and shall be capable of normal operation after the test, and shall
meet the requirements of 4.2.3 for the accuracy for the measurement of the state
parameters.
4.2.16 Resistance to power polarity reversal
The battery management system shall be capable of withstanding the power supply
polarity reversal test specified in 5.17, and shall be capable of normal operation after
the test, and shall meet the requirements of 4.2.3 for the accuracy for the measurement
of the state parameters.
5 Test Method
5.1 Test conditions.
Unless otherwise specified, the test shall be carried out at an ambient temperature of
18��C to 28��C, a relative humidity of 4.5% to 75%, and an atmospheric pressure of 86
kPa to 106 kPa.
5.1.2 Test voltage.
14V �� 0.2 V (nominal 12 V) or 28 V �� 0.4 V (nominal 24 V), unless otherwise noted or
specific to the manufacturer.
5.1.3 Test instrumentation.
All test instruments, equipment shall have sufficient accuracy and stability, whose
accuracy is higher than the measured index accuracy by an order of magnitude or error
is less than 1/3 of the measured parameter tolerance.
5.2 Insulation resistance
Measure the insulation resistance by applying a voltage of 500 V DC between the
voltage-sensing circuit of the battery management system and its shell.
5.3 Voltage withstand performance insulation
A sinusoidal waveform AC voltage of 50 Hz is applied between the voltage sampling
circuit of the battery management system (corresponding to the positive pole of the
battery system) and its shell. The test voltage (effective value) is the maximum
operating voltage that can occur in this circuit (if less than 550V, the test voltage is 550
V). It lasts for 1 min.
5.4 Accuracy for the measurement of state parameters
5.5 Accuracy for SOC estimation
5.5.1 General rules
5.5.2 Available capacity test
Conduct the test in accordance with the procedures as follows.
5.5.3 SOC Test.
5.6 Battery fault diagnosis
Establish the triggering conditions for the fault items listed in Table 2 through the
simulation system, and record the corresponding fault items and their triggering
conditions. Conduct function check for the other fault diagnosis items in accordance
with the requirements of the manufacturer��s specifications.
5.7 Overvoltage operation
Adjust the power supply voltage to 16 V or 32 V, operate continuously under the power
supply voltage, record the data acquired by the battery management system during
the test (not less than 2 voltage acquisition channels and not less than 1 temperature
acquisition channel for the monomers or modules), and compare it with the
corresponding data tested by the testing equipment.
5.10 Low-temperature operation
Place the battery management system in the operating state into an incubator with the
initial temperature of room temperature, lower the temperature to -25��C �� 2��C before
maintaining it for 1 h, record the data acquired by the battery management system
during the test (not less than 2 voltage acquisition channels and not less than 1
temperature acquisition channel for the monomers or modules), and compare it with
the corresponding data tested by the testing equipment.
5.11 Resistance to high temperature
Place the battery management system into an incubator with the initial temperature of
room temperature, and maintain the temperature for 4 h after reaching 85��C �� 2��C.
Make the battery management system start to work after recovering to room
temperature, record the data acquired by the battery management system (not less
than 2 voltage acquisition channels and not less than 1 temperature acquisition
channel for the monomers or modules), and compare it with the corresponding data
tested by the testing equipment.
5.15 Resistance to heat and humidity
Conduct the damp heat test for the battery management system in accordance with
the specifications of GB/T 2423.4 (at the high temperature 55��C). The test lasts for 2
cycles (48 h).
5.16 Resistance to vibration
Fix the battery control unit and the control unit of battery electronics (if any) on the
vibration generator in accordance with the actual installation state of the complete
vehicle or substantially equivalent conditions thereof, and conduct the sweep
frequency vibration test in the three directions including up and down, left and right and
front and back. The test in each direction lasts for 8 h. The vibration waveform of the
test is sinusoidal.
5.17 Resistance to power polarity reversal
Set the input power supply to the reverse voltage value before connecting the power
supply of the battery management system, and then maintain it for 1 min. Make sure
the power supply of the battery management system is normal after the test, determine
whether it is in a normal operating state, and record the data acquired by the battery
management system if normal (not less than 2 voltage acquisition channels and not
less than 1 temperature acquisition channel for the monomers or modules), and
compare it with the corresponding data tested by the testing equipment.
5.18 Immunity to electromagnetic radiation
Conduct the test in accordance with the specifications of GB/T 17619.During the test,
record the data acquired by the battery management system (not less than 2 voltage
acquisition channels and not less than 1 temperature acquisition channel for the
monomers or modules), and compare it with the corresponding data tested by the
testing equipment.
6 Inspection rules
6.1 Inspection categories
The inspection can be divided into exit-factory inspection and type inspection.
6.2 Exit-factory inspection
6.2.1 The battery management system can only be delivered after it passes the
inspection of the quality inspection department of the manufacturer, and shall be
accompanies by the certificate of conformity.
6.2.2 Batch. the products produced each day is a batch.
6.3 Type inspection
6.3.1 A type inspection shall be conducted in one of the following cases.
6.3.3 In the type inspection, if there are unqualified items, the number of samples
shall be doubled from the batch of battery management systems for a reinspection on
the unqualified items; and if the reinspection fails to pass, then the type inspection fails
to pass.
7 Marking
7.1 The battery management system shall be marked as follows.
7.2 The exterior of the packing case shall be marked as follows.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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