QC/T 744-2006 English PDF (QCT744-2006)

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QC/T 744-2006: Nickel-metal hydride batteries for electric vehicles
QC/T 744-2006
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Nickel-metal hydride batteries for electric vehicles
ISSUED ON. MARCH 7, 2006
IMPLEMENTED ON. AUGUST 1, 2006
Issued by. National Development and Reform Commission
Attachment.
18 Numbers and Titles of Automotive Industry Standards
S/N Number of Standard Title of Standard
Number of
Standard to be
Replaced
72 QC/T 741-2006 Ultra capacitors for Vehicles
73 QC/T 742-2006 Lead-acid batteries for electric vehicles
74 QC/T 743-2006 Lithium-ion batteries for electric vehicles
75 QC/T 744-2006 Nickel-metal hydride batteries for electric vehicles
76 QC/T 745-2006 Rubber pipelines for liquefied petroleum gas vehicles
77 QC/T 746-2006 High pressure pipelines for compressed natural vehicles
78 QC/T 33-2006 Test methods of viscous fan clutch for automotive engines QC/T 33-1992
79 QC/T 747-2006 Specifications of viscous fan clutch for automotive engines
80 QC/T 748-2006 The bench test methods of valve-valve holder intensify abrasion for automotive engines
81 QC/T 471-2006 Specifications for auto diesel engines QC/T 471-1999
82 QC/T 749-2006 Tree sprinkling tanker
83 QC/T 750-2006 General specifications for cleaning tanker
84 QC/T 54-2006 Street sprinklers QC/T 29114-1993 QC/T 54-1993
85 QC/T 53-2006 Suction-type excrement tanker QC/T 29113-1993 QC/T 53-1993
86 QC/T 51-2006 Sweeper truck QC/T 29111-1993 QC/T 51-1993
87 QC/T 751-2006 Method of durability test for catalytic converter of motorcycle and moped
88 QC/T 752-2006 General specifications for catalytic converters of motorcycles and mopeds
89 QC/T 753-2006 Motorcycles and mopeds-The form format of technical parameters
Table of Contents
Foreword ... 5 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms, definitions, and symbols ... 6 
4 Classification ... 7 
5 Requirements ... 7 
6 Test methods ... 10 
7 Inspection rules ... 19 
8 Marking, packaging, transportation and storage ... 20 
Annex A (Normative) Consistency analysis method ... 23 
Annex B (Normative) Test steps of simple simulation conditions ... 25 
Nickel-metal hydride batteries for electric vehicles
1 Scope
This Standard specifies the requirements, test methods, inspection rules,
marking, packaging, transportation and storage of sealed nickel-metal hydride
batteries for electric vehicles (hereinafter referred to as batteries).
This Standard applies to the sealed nickel-metal hydride batteries for electric
vehicles with a nominal voltage of 1.2V for cell and n × 1.2V (n is the number
of batteries, n≥5) for module.
2 Normative references
The provisions in the following documents become the provisions of this
Standard through reference in this Standard. For dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, parties who reach an agreement based on this
Standard are encouraged to study if the latest editions of these documents are
applicable. For undated references, the latest editions apply to this Standard.
GB/T 2900.11 Electrotechnical terminology - Primary and secondary cells
and batteries (eqv IEC 60050(482).2003)
3 Terms, definitions, and symbols
3.1 Terms and definitions
The terms and definitions established in GB/T 2900.11 and the following ones
apply to this Standard.
3.1.1 High energy density battery
A battery characterized by high energy density and is mainly used for high
energy output.
3.1.2 High power density battery
A battery characterized by high power density and is mainly used for
instantaneous high power output and input.
3.1.3 Sweep cycle
e) When the battery is subjected to the heating test in accordance with 6.2.10.5,
it shall not explode or ignite.
f) When the battery is subjected to the pin-prick test in accordance with 6.2.10.6,
it shall not explode or ignite.
g) When the battery is subjected to the extrusion test in accordance with
6.2.10.7, it shall not explode or ignite.
5.1.10 Cycle life
When the battery is tested according to 6.2.11, its capacity shall not be less
than 90% of the rated capacity after 500 cycles of cycle life, and liquid leakage
shall not be allowed during the test.
5.1.11 Storage
When the battery is tested according to 6.2.12, the discharge capacity after
recovery shall not be less than 90% of the rated capacity.
5.2 Battery module
5.2.1 Appearance
When the battery module is tested according to 6.3.1, the appearance shall not
be deformed or cracked, the surface shall be flat and dry, with no injury; and
the arrangement shall be neat, the connection shall be reliable, and the mark
shall be clear.
5.2.2 Polarity
When the battery module is tested according to 6.3.2, the polarity of the battery
shall be consistent with the polarity symbol of the sign.
5.2.3 Outline dimensions and quality
The outline dimensions and quality of the battery module shall meet the
technical conditions provided by the manufacturer.
5.2.4 20°C discharge performance
Each module is required to consist of 5 or more cells in series. When the battery
module is tested according to 6.3.5, its discharge capacity shall not be lower
than the rated value.
5.2.5 Simple simulation conditions
Each module is required to consist of 5 or more cells in series. When the battery
module is tested according to 6.3.6, the number of withstand pulses shall not
6.2.9.1 Room temperature charge retention.
a) The battery is charged according to the method of 6.2.4.
b) The battery is stored at 20°C ± 5°C for 28h.
c) The battery is discharged at a current of 1I3 (A) at 20°C ± 5°C until the
discharge cut-off voltage (1.0V).
d) The capacity (in A·h) is calculated using the current value and the discharge
time data. The charge retention can be expressed as a percentage of the
rated capacity.
6.2.9.2 High temperature charge retention.
a) The battery is charged according to the method of 6.2.4.
b) The battery is stored at 55°C ± 2°C for 7d.
c) After transferred to 20°C ± 5°C and persisted for 5h, the battery is discharged
at a current of 1I3 (A) until the discharge cut-off voltage (1.0V).
d) The capacity (in A·h) is calculated using the current value and the discharge
time data. The charge retention can be expressed as a percentage of the
rated capacity.
6.2.10 Safety
All safety tests are carried out under conditions of adequate environmental
protection.
6.2.10.1 Short circuit.
a) The battery is charged according to the method of 6.2.4.
b) The battery is short-circuited externally. The external circuit resistance shall
be less than 5mΩ, and the short-circuit time is 10min. The battery shall
comply with the provisions of 5.1.9 a).
6.2.10.2 Over-discharge.
a) The battery is charged according to the method of 6.2.4.
b) After the battery is discharged to the cut-off voltage of 0V at a current of 1I3
(A) at 20°C ± 5°C, the discharge current is increased to 2I3 (A), and last for
10min. The battery shall comply with the provisions of 5.1.9 b).
6.2.10.3 Overcharge.
capacity at 20°C ± 5°C and allowed to stand for 1h.
c) The battery is discharged at a constant current of 3I3 (A) to 1.0V at 20°C ±
5°C and allowed to stand for 1h to complete a cycle.
d) The battery is repeated 24 times according to steps b) - c).
e) CYCLE 25 times into one cycle. After the 24th cycle, the 25th cycle is charged
at a constant current of 3I3 (A) to 105% of the actual capaci...