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JB/T 11137-2011 (JBT 11137-2011)

JB/T 11137-2011_English: PDF (JBT11137-2011)
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BASIC DATA
Standard ID JB/T 11137-2011 (JB/T11137-2011)
Description (Translated English) General requirement of lithium-ion battery assembly
Sector / Industry Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard K81
Classification of International Standard 29.220
Word Count Estimation 38,316
Date of Issue 2011-05-18
Date of Implementation 2011-08-01
Quoted Standard GB/T 156-2007; GB 2893-2008; GB 2894-2008; GB 4208-2008; GB 4824-2004; GB/T 5465.2-2008; GB/T 17626.2-2006; GB/T 17626.3-2006; GB/T 17626.4-2008; GB/T 17626.5-2008; GB/T 17626.6-2008; GB/T 18858.3-2002; JB/T 11138-2011; JB/T 11139-2011; JB/T 11140-2011; JB/T 11141-2011; JB/T 11142-2011; SJ/T 11364-2006
Drafting Organization Mechanical Science Research Institute
Administrative Organization Mechanical Science Research Institute
Regulation (derived from) Ministry of Industry and Information Technology Bulletin No. 13 of 2011
Summary This standard specifies the lithium-ion battery assembly terminology and definitions, classifications and models, requirements, test methods, inspection, labeling, packaging, transportation and storage. This standard applies to a capacity greater than or equal to 6A �� h lithium-ion battery system composed.

JB/T 11137-2011
JB
MACHINERY INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 29.220
K 81
Filing No.:
General requirement of lithium-ion battery assembly
ISSUED ON: MAY 18, 2011
IMPLEMENTED ON: AUGUST 01, 2011
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Classification and model ... 8
4.1 Classification ... 8
4.2 Model ... 9
4.3 Composition of lithium-ion battery assembly ... 11
5 Technical requirements ... 11
5.1 Appearance ... 11
5.2 Technical requirements ... 11
5.3 Safety requirements ... 21
5.4 Environmental requirements ... 23
5.5 Electromagnetic compatibility (EMC) ... 25
6 Test method ... 27
6.1 Test conditions ... 27
6.2 Appearance ... 28
6.3 Consistency test of lithium-ion battery ... 28
6.4 Interface and communication protocol test ... 28
6.5 Electric energy (kW·h) test ... 33
6.6 Service life test ... 34
6.7 Peak power consumption ... 35
6.8 Insulation resistance test ... 36
6.9 Electromagnetic compatibility test ... 38
7 Inspection... 39
7.1 Classification of inspections ... 39
7.2 Exit-factory inspection ... 39
7.3 Type test ... 40
7.4 Inspection rules ... 40
8 Marking, packaging, transportation and storage ... 41
8.1 Marking ... 41
8.2 Packaging ... 42
8.3 Transportation ... 43
8.4 Storage ... 43
Appendix A (Normative) Function configuration of lithium-ion battery
management system ... 44
A.1 Function configuration... 44
A.2 Technical requirements ... 45
A.3 Charge control circuit ... 46
A.4 Discharge control circuit ... 46
A.5 I/O circuit ... 46
A.6 Voltage monitoring circuit of battery cell ... 46
A.7 Automatic balanced circuit ... 46
Appendix B (Normative) Composition of lithium-ion battery assembly ... 47
B.1 Overview ... 47
B.2 Composition of standard and balanced battery assembly ... 47
B.3 Composition of basic lithium-ion battery assembly ... 49
B.4 Composition of I/O type lithium-ion battery assembly ... 49
B.5 Lithium-ion battery module... 50
B.6 Lithium-ion battery assembly controller (BECU) ... 50
Appendix C (Normative) Discharge control mode of lithium-ion battery module
and assembly ... 52
C.1 Overview ... 52
C.2 Discharge control method of proportional multiplier ... 52
C.3 Digital control discharge method ... 53
C.4 I/O discharge control method ... 53
Appendix D (Informative) Consistency test method of lithium-ion battery ... 54
D.1 Overview ... 54
D.2 Consistency Index (C) ... 54
D.3 Consistency test method ... 56
General requirement of lithium-ion battery assembly
1 Scope
This standard specifies the terms and definitions, classification and model,
requirements, test methods, inspection, marking, packaging, transportation and
storage of lithium-ion battery assemblies.
This standard applies to systems, which are composed of lithium-ion batteries
with a capacity greater than or equal to 6 A·h.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 156-2007 Standard voltage
GB 2893-2008 safety colors
GB 2894-2008 Safety signs and guideline for the use
GB 4208-2008 Degrees of protection provided by enclosure (IP code)
GB 4824-2004 Industrial, scientific and medical (ISM) radio-frequency
equipment - Electromagnetic disturbance characteristics - Limits and
methods of measurement
GB/T 5465.2-2008 Graphical symbols for use on electrical equipment - Part
2: Graphical symbols
GB/T 17626.2-2006 Electromagnetic compatibility (EMC) - Testing and
measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3-2006 Electromagnetic compatibility - Testing and
measurement techniques - Radiated radio-frequency electromagnetic field
immunity test
GB/T 17626.4-2008 Electromagnetic compatibility - Testing and
measurement techniques - Electrical fast transient/burst immunity test
of the positive and negative potential pairs.
3.3
Lithium-ion battery pack
A combination of several lithium-ion battery cells, which are connected by a
circuit, in a single mechanical-electrical unit.
3.4
Lithium-ion battery module
A combination of lithium-ion battery packs and circuit modules (monitoring
and protection circuits, connection circuits, communication interfaces,
thermal management equipment, etc.), which is placed in a mechanical-
electrical unit.
3.5
Lithium-ion battery assembly
A power supply system which, composed of one or several lithium-ion
battery modules, circuit equipment (protection circuit, lithium-ion battery
management system, circuit and communication interface), etc., is used to
provide electrical energy to electrical equipment.
3.6
Lithium-ion battery assembly controller
A short-circuit unit which, composed of circuits and circuit interfaces and
communication interfaces which are controlled by an embedded
microcontroller, is used for battery assembly data processing, charge
management, discharge management, provision of relevant data for user
equipment. It is shortly referred to as battery assembly controller (BECU).
3.7
Voltage monitoring circuit unit for battery cell
A unit, which is connected with each battery cell, for continuous monitoring
of the highest and lowest operating voltage of the battery cell.
3.8
Electric energy
The amount of electric energy provided by the lithium-ion battery, when it is
Example: Lithium-ion battery assembly, which has a model number of FEB 12.5-
144/3-50/9-4009, represents that:
- FEB: Standard configuration (B) energy type (E) lithium iron phosphate (F) battery
assembly;
- 12.5: The electric energy is 12.5 kW·h;
- 144/3: Consists of 3 battery modules with a nominal voltage of 48 V; the nominal
voltage of the battery pack is 144 V;
- 50/9: The rated discharge current is 50 A; the maximum discharge current is 450
A (50 A x 9);
- 4009: The battery module adopts a standard battery module box, which has a type
code of 4009.
4.2.1 Type code
The type code of the lithium-ion battery assembly consists of three characters:
The first character (A): Battery module type, see 4.1.1;
The second character (B): Battery type, see 4.1.2;
The third character (C): Function configuration of battery management system
(BMS), see 4.1.3.
4.2.2 Electric energy
The electric energy is represented by three effective Arabic numerals, in the
unit of kilowatt·hour (kW·h).
When the electric energy is less than 10 kW·h, it retains 2 decimal places, such
as 9.85 kW·h;
When the electric energy is greater than or equal to 10 kW·h but less than 100
kW·h, it retains one decimal place, such as 13.7 kW·h;
When the electric energy is greater than or equal to 100 kW·h, it is represented
by a 3-digit integer, such as 143 kW·h.
4.2.3 Nominal voltage/number of modules
The nominal voltage (U) of the battery modules, that make up the lithium-ion
battery assembly, in the unit of V.
The number of battery modules that make up the lithium-ion battery assembly
(N).
a) Circuit interface and interface protocol:
1) Charge control guide interface and interface protocol;
2) Voltage monitoring circuit's interface and interface protocol of battery
cell;
3) Interface and connection protocol of charge and discharge control
circuit;
4) I/O charge and discharge's interface circuit and interface protocol.
b) Communication interface and communication protocol:
1) Including internal communication interface and communication protocol;
2) Charge and discharge communication interface and communication
protocol;
3) User communication interface and communication protocol.
The interface and communication protocol of the battery assembly shall comply
with the requirements of JB/T 11138-2011.
5.2.5 Compliance and reliability
5.2.5.1 Compliance
The compliance requirements for interface and communication protocols
include:
a) Compliance requirements for circuit interface and interface protocol:
1) The charge control pilot circuit's interface and interface protocol shall
comply with the provisions of 4.3.2 in JB/T 11138-2011;
2) The voltage monitoring circuit's interface and interface protocol of
battery cell shall meet the requirements of 4.2.3 in JB/T 11138-2011;
3) The charge control circuit's interface and interface protocol shall meet
the requirements of 4.3.3 in JB/T 11138-2011;
4) The discharge control circuit's interface and interface protocol shall
comply with the requirements in 4.4 of JB/T 11138-2011;
5) I/O charge control circuit's interface and interface protocol shall meet
the requirements of 4.3.4 in JB/T 11138-2011;
6) I/O discharge control circuit's interface and interface protocol shall
d) The mileage, such as electric vehicles and similar applications.
The specific requirements are specified in the relevant product standards.
5.2.10 Charge equipment
The charge equipment used for lithium-ion batteries shall meet the following
requirements:
a) Have the control circuit interface and the communication interface, which
are connected to the battery module and the assembly, AND conforms to
the requirements of JB/T 11138-2011;
b) Have technical measures, to prevent the charge voltage, charge current,
temperature inside the battery module from exceeding the allowable value;
c) When the consistency of the battery is in any state, it shall be free from
such issues as shortened service life or decrease of safety, due to the
charge voltage of the battery cell exceeding the specified value;
d) When the battery voltage is lower than the minimum allowable value, once
charge equipment is started, it shall automatically enter the pre-charge
state. The specific requirements for pre-charge are specified in the
relevant industry technical specifications;
e) When using digital control charge equipment, there must be technical
measures, to prevent the charge voltage of the battery cell from exceeding
the allowable value, due to the imbalance or failure of the voltage testing
of battery cell;
f) There shall be a circuit disconnecting equipment BETWEEN the
connection of the charge equipment AND the battery module or assembly.
When necessary, the battery module and assembly shall be able to
disconnect the equipment, through the control circuit of the interface circuit,
thereby immediately cutting off the connection between the battery and
the charge equipment;
g) The specific requirements of charge equipment shall meet the
requirements of JB/T 11142-2011.
5.2.11 Electrical equipment
The electrical equipment connected to the lithium-ion battery shall meet the
following requirements:
a) Have a control circuit interface and a communication interface, which are
connected to the battery module and assembly, AND conforms to the
Figure 3 -- Installation position of fast fuse
5.3.5.2 BETWEEN the lithium-ion battery assembly AND electrical equipment
and discharge equipment, it shall install an overcurrent disconnection
equipment. For the model and specification of the overcurrent disconnection
equipment, they shall be determined according to the requirements of the
electrical equipment, which is connected to the lithium-ion battery assembly.
However, the disconnect current value shall not be greater than 80% of the
rated current of the fast fuse as specified in 5.3.5.1.
5.3.5.3 The overcurrent disconnection equipment shall, under any of the
following conditions, immediately disconnect the battery from the charge-
discharge equipment:
a) The current, which flows through the current disconnection equipment,
exceeds the specified value;
b) There is more than one short-circuit point, BETWEEN the lithium-ion
battery assembly AND the electric chassis; meanwhile the short-circuit
current through the overcurrent disconnection equipment exceeds the
specified value.
5.3.6 Harmful substances
The electronic products, that make up the lithium-ion battery assembly, shall
comply with the requirements in SJ/T 11364-2006.
In the event of an accident or other accident conditions that may release more
harmful substances, the design and installation of the lithium-ion battery
assembly shall take corresponding technical measures, to minimize the risk,
AND in particular to ensure the personal will not be injured.
5.4 Environmental requirements
Unless otherwise specified, the lithium-ion battery assembly shall be operated
in the following environmental conditions.
5.4.1 Altitude
The altitude does not exceed 1000 m.
When the altitude exceeds 1000 m, the electrical and electronic equipment shall
be corrected according to the following requirements. The correction content is
as shown in Table 11. For the correction data of the lithium-ion battery, it shall
be specified in the manufacturer's technical document.
performance degradation or functional damage is allowed, except for the
allowable specified limits. See Table 13 for the performance criterion of
immunity.
5.5.2.2 Electrostatic discharge (ESD) immunity
According to the requirements of GB/T 17626.2-2006, 10 discharges shall be
applied to each pole. The method is as follows:
a) For non-metallic enclosures, use air gap discharge method to apply ±8 kV;
b) For metallic enclosures, use air gap discharge method to apply ±4 kV.
Follow the performance criterion B (see 5.5.2.1).
5.5.2.3 Radiation immunity of radio frequency electromagnetic field
According to the requirements of GB/T 17626.3-2006:
The amplitude modulated wave which has a frequency range of 80 MHz ~ 1000
MHz AND an intensity of 10 V/m.
Follow the performance criterion A (see 5.5.2.1).
5.5.2.4 Electrical fast transient/pulse group immunity
According to the requirements of GB/T 17626.4-2008:
a) The maximum test voltage of ±1000 V at 5 kHz is applied to the cable,
which contains the CDI communication medium;
b) The maximum test voltage of ±2000 V at 5 kHz is applied to all other cables
and terminals.
Follow the performance criterion B (see 5.5.2.1).
5.5.2.5 Surge immunity
According to the requirements of GB/T 17626.5-2008:
a) BETWEEN the AC power supply and DC control power supply AND the
electric chassis, apply 5 surges which have a maximum voltage of ±2000
V;
b) BETWEEN the AC power supply AND the DC control power supply, apply
5 surges which have a maximum voltage of ±1000 V.
Follow the performance criterion B (see 5.5.2.1).
6.2 Appearance
Under good light conditions, visually inspect the appearance of all the
equipment that make up the lithium-ion battery assembly, which shall meet the
requirements of 5.1.
6.3 Consistency test of lithium-ion battery
For the consistency test of the batteries which make up the lithium-ion battery
modules and assemblies, refer to the method specified in Appendix D.
6.4 Interface and communication protocol test
The interface and communication protocol tests are divided into the following
two tests:
a) Compliance test;
b) Reliability test.
6.4.1 Compliance test
The conformance test of the lithium-ion battery module and assembly is to test
the compliance of the interface and communication protocol of the tested
equipment, with the provisions of JB/T 11138-2011, which is further divided into:
a) Compliance test of circuit interface and protocol;
b) Compliance test of communication interface and communication protocol.
6.4.1.1 Compliance test of circuit interface and protocol
Connect the equipment under test to the test system. Use a voltmeter and
oscilloscope to test the level and waveform of the interface. It shall meet the
requirements of Chapter 4 in JB/T 11138-2011.
6.4.1.2 Compliance test of communication interface and communication
protocol
Connect the equipment under test to the power-type lithium-ion battery system
interface and communication protocol test system, through a dedicated
connection cable (see Figure 4). Test the compliance of the interface and
communication protocol according to the test procedures and methods, which
are specified by the test system.
d) During the test, it shall record the given and actual values of current and
voltage, events and handling conditions.
The test results shall meet the requirements of 5.2.5.2.
6.4.2.3 Charge and discharge test at rated current
After completing the tests specified in 6.4.2.2, carry out the following tests.
Test purposes:
a) Test the stability of the equipment under test during charge and discharge
process at rated current;
b) The actual electric energy of the tested lithium-ion battery module or
assembly (unit: kW·h);
c) The consistency of the tested lithium-ion battery module or assembly.
Test method:
a) Connect the equipment under test to the integrated test system of the
lithium-ion battery system.
b) Carry out the discharge test, at the maximum charge current of 0.3I3, until
the automatic shutdown. The actual discharge electric energy is the actual
electric energy of the tested battery module or assembly. At the same time,
carry out the consistency test of battery at discharge state, as specified in
6.3.
c) Carry out the charge test, at the maximum charge current of 0.3I3, until the
automatic shutdown. At the same time, carry out the consistency test of
battery at charge state, as specified in 6.3.
d) During the test, it shall record the given value and actual value of current
and voltage, the relative range, the relative standard deviation, the
consistency index, the incident and disposal conditions.
The test results shall meet the requirements of 5.2.5.2.
6.4.2.4 Charge and discharge test under variable working conditions
After completing the tests specified in 6.4.2.3, carry out the following tests.
Test purpose: Interoperability reliability test of the equipment under test.
Test method: Carry out the charge and discharge test, according to the
procedures and methods specified in Table 14.
discharged by the battery module or assembly in the discharge test, is the
actual electric energy of the lithium-ion battery module or assembly.
If the first test fails to reach the specified value, it is allowed to re-test; however,
if the specified value is still not reached after the fifth charge-discharge cycle
test, it shall stop the test.
For the value of the electric energy (in kW·h) of the lithium-ion battery assembly,
it retains three significant digits.
When the value is less than or equal to 10kW·h, keep two decimal places, such
as 9.67kW·h;
When the value is greater than 10 kW·h but less than 100 kW·h, keep 1 decimal
place, such as 98.5 kW·h;
When the value is greater than or equal to 100 kW·h, it is represented by an
integer, such as equal to or greater than 120 kW·h.
6.6 Service life test
6.6.1 Service life under standard cycle
6.6.1.1 At (20 ± 5) °C, according to the test method specified in 6.4.2.3, charge
and discharge the battery module or assembly. Between charge and discharge,
it can be put aside for 1 h.
6.6.1.2 Repeat the test according to 6.6.1.1, until the discharged electric energy
is less than 80% of the electric energy.
6.6.1.3 The number of repeated tests in accordance with 6.6.1.1 is the service
life under standard cycle.
6.6.1.4 In the service life test under standard cycle, the consistency of the
battery module and assembly is not tested.
6.6.2 Service life under working condition cycles
6.6.2.1 For the service life test methods, under working condition cycle, of
lithium-ion battery modules and assemblies, they shall be specified in relevant
product standards or industry specifications.
6.6.2.2 Carry out the test according to the method specified in 6.6.2.1, until the
discharged electric energy is less than 60% of the electric energy.
6.6.2.3 During the test, it is allowed to replace no more than 10% of the battery
cell.
6.7.4.2 Test steps
Connect U+ end of the equipment under test to the power supply U-. Connect
the U- end of the equipment under test to the power supply U+. Monitor the
working status of the equipment under test. THEN, connect the U+ end of the
equipment under test to the power supply U+. Connect the U- end of the
equipment under test to the power supply U-. The system shall return to normal
working.
6.7.4.3 Corresponding criterion
When U+ and U- are connected incorrectly, the equipment under test shall not
be damaged. Once U+ and U- are connected correctly, the equipment under
test shall be able to resume normal operation.
6.8 Insulation resistance test
6.8.1 For the formation of lithium-ion battery assembly which has a maximum
working voltage lower than DC 60 V, it does not need to meet the requirements
of 6.8.2.
6.8.2 For the insulation resistance of the lithium-ion battery assembly, which is
obtained according to the measurement method specified in 6.8.8, it shall meet
the requirements of 5.3.1.
6.8.3 For the components of the lithium-ion battery module or assembly, which
are subject to the measurement of insulation resistance, they shall be
individually subject to insulation measurement, before being assembled. It shall
comply with the provisions of 5.3.1.
6.8.4 Except for the positive and negative output cables of the lithium-ion
battery module or assembly, the charge equipment and electrical equipment,
as well as the insulation monitoring equipment, which shall be disconnected, all
other components shall be in a normal connection state.
6.8.5 During the measurement, the voltage of the lithium-ion battery assembly
shall be equal to or higher than the nominal voltage of the lithium-ion battery
assembly.
6.8.6 The test voltmeter shall be able to measure DC voltage. The internal
resistance shall be greater than 10 MΩ.
6.8.7 The measurement shall be carried out in an environment of (23 ± 5) °C.
6.8.8 Measuring method: