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Shenzhen Topband New Energy Co.,Ltd
A professional manufacturer of LiFePO4 battery / lithium iron phosphate, decicated to designing, researching, manufacturing, and exporting LiFePO4 batteries( cell & pack & energy storage system) to
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3.7V 2000mAh Rechargeable Motive Power 18650AN Cell Low Self - Discharge

Shenzhen Topband New Energy Co.,Ltd
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Shenzhen Topband New Energy Co.,Ltd
Country/Region: China
Tel: 86-755-27651888-8008
Contact Person:
Mr Jerry Yang

3.7V 2000mAh Rechargeable Motive Power 18650AN Cell Low Self - Discharge

Brand Name : Topband
Model Number : 18650AN-2000mAh
Certification : MSDS
Place of Origin : China
MOQ : 3000pcs
Price : Negotiable
Payment Terms : T/T, L/C
Supply Ability : 450Mwh/year
Delivery Time : 2~4weeks for samples; 4~6weeks for mass production
Packaging Details : standard export carton & pallet
Chemistry : NMC
Norminal Voltage : 3.7V
Weight : ≤45g
Nominal Capacity : 2000mAh@0.2C
Max Continue Discharge Current : (25A) 25℃ (for cycle life)
Standard discharge; : 1C (25℃);
charge current : Standard charge; 0.5C 25℃;Rapid charge: 2.5C(5A)25℃;
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Preface

This specification describes the type and dimension, performance, technical characteristics, warning and caution of the lithium ion rechargeable cell. The specification only applies to 18650AN-1500mAh cells supplied by TOPBAND New Energy Company.

  1. Definition
    1. Nominal capacity

Nominal capacity is the initial discharge capacity of the cell, which is measured with discharge current of 400mA with 2.75V cut-off at 25℃ within 1hour after the standard charge.

Nominal capacity≥2000mAh


  1. tandard charge method

Under 25±2℃, it can be charged to 4.2V with constant current of 0.5C(1000mA), and then charged continuously with constant voltage of 4.2V until the charged current is 0.02C(40mA)


  1. Cell type and dimension
  2. Description and model
  3. Description: Cylindrical Li-ion rechargeable cell Model: 18650AN-2000mAh

Photos

Photos


Photos


Cell top


Cell barcode


|cell bottom



Cell physical dimension listed in Figure 1(unit: mm).



  1. Cell characteristics fresh cell tested at 25±2℃,standard charge unless otherwise specified

ITEM


SPECIFICATION


Nominal capacity



2000mAh@0.2C

Nominal voltage



3.7V

Charge voltage



4.2 ±0.03V

Discharge cut-off voltage



2.75±0.03 V

charge current


Standard charge; 0.5C 25℃;Rapid charge: 2.5C(5A)25℃;


discharge current


Standard discharge; 1C 25℃; Max discharge: 15C(30A)25℃(not for cycle life)


Max continue discharge current


(25A) 25℃ (for cycle life)



Storage temperature


12 months : -10~45℃

3 months : -20~45℃

1 month : -20~60℃

Humidity range


0~90%RH (non-condensing)

Internal resistance


≤20mΩ (AC Impedance, 1000 Hz)



Cell dimension

Height : 65.0 mm Max

Diameter :18.5mm Max

Weight


≤45g


Current/A1C3C5C10C12.5C15C17.5C
2A6A10 A20A25A30A35A
Relative capacit%(2A)99%97%95%95%90%85%80%


  1. Technical requirements
  2. Operating Environment Temperature Temperature of charge :0~45℃
  3. Temperature of discharge : -20~60℃
  4. Cell testing conditions
  5. Temperature : 25±2℃
  6. Voltage meter: The voltage tester internal resistance is ≥ 10 KW/V

NO.


ITEM


CRITERION



5.4.1


Discharge

Test condition:
Temperature : 25±2.℃
Charge: CC/CV 0.5C(1000mA) 4.2V cut off current: 0.05C(100mA)
Discharge: CC variable values as the follow table End-of-discharge Voltage: 2.75V
rate
capability

5.4.2


Charge rate capability

Test condition:



Temperature : 25±2.℃

Charge: CC variable values as the follow table; End-of-charge Voltage: 4.2V Discharge: CC 0.5C(1000mA) 2.75V





Current/A0.5C1C2C3C
1A2A4A6A
Relative capacity%(2A)95%90%85%80%

5.4.3


Cycle life


Test condition: Temperature : 25±2℃

Charge: CC/CV 1C (2A) 4.2V cut off current: 0.05C(100mA) Discharge: CC 12.5C(25A); End-of-discharge Voltage: 2.75V


Discharge capacity of 301th cycle ≥ 80% ;


5.4.4


High-Low

Test condition:
Charge: CC/CV 0.5C(1000mA) 4.2V cut off current: 0.05C (100mA)
Discharge: CC 1C(2A); End-of-discharge Voltage: 2.75V(60℃&25℃&-20℃)
temperature
discharge performance



5.4.5


Storage performance


Test condition:

Charge: CC/CV 0.5C(1000mA) 4.2V cut off current: 0.05C(100mA); stored at 25℃ for 28 days

Discharge: CC 1C(2.0A ); End-of-discharge Voltage: 2.75V


Residual capacity after 28days strorgge ≥80% ;




Recovery capacity after 28days strorgge ≥90% ;


Test condition:

Charge: CC/CV 0.5C(1000mA) 4.2V cut off current: 0.05C(100mA); stored at 60℃ for 7 days

Discharge: CC 1C(2A ); End-of-discharge Voltage: 2.75V


Residual capacity after 7days strorgge ≥80% ;

Original discharge capacity


Recovery capacity after 7days strorgge ≥90% ;

Original discharge capacity


NO.


ITEM


CRITERION


TESTING METHOD



5.5.1


Overcharge test



No leakage,No flame, No fire,No explode

Ambient Temp:25±2℃

Cell shall first be charged according to standard charge method. Then the cell is charged at 1C to 6.5V or charged at 1C for 1hr.

25±2℃



5.5.2


130℃hot oven test



When the temperature of the cell is 130℃.

Cell must not fire or explode in 30 minutes



The cell is charged following the standard charge method. After charging the cell is put in the oven. And then the oven temperature will be ramped at

5℃ per minute to 130℃ and held at 130℃. When the temperature of the

cell reach 130℃, the cell is maintained in the 130℃ oven for a maximum of 30 minutes or until a fire or explosion is obtained, whichever comes

first. Record the time that the cell temperature reaches 130℃ and the time when a fire or explosion occurs.





5.5.3


Crush test



No fire,No explode


After charging a cell following the standard charge method, the cell shall
be crushed between two flat surfaces. The direction of the crushing force
shall be vertical to axis of the cylinder. The crushing force is to be applied
by a hydraulic ram with a 32mm diameter piston. Crushing force is
approximately 13 KN. Once the maximum pressure has been obtained it is to be released.

5.5.4


Short circuit test



No fire,No explode



Cell shall first be charged according to standard charge method, and then

cell is to be short-circuited by connecting the positive and negative

terminals of the cell with copper wire having a maximum resistance load less than 5 mΩ at 25 ℃ & 60 ℃. Monitor the cell temperature for 1hr

while testing.



5.5.5


Over discharge test


No fire,No explode, No leak



Cell shall first be charged according to standard charge method. Then the cell is discharged at 1C for 90min.



5.5.6


Drop test


No fire,No explode,Cell shall first be charged according to standard charge method, and then cell is

No leak


dropped 1.5m height on floor slab, with two directions.



5.5.7


Seawater immersion



No fire,No explode, No leak


Cell shall first be charged according to standard charge method, and then, immerse the battery in seawater (3.5wt% of salt) for 2 hours.




5.5.8


Thermal cycling



No fire,No explode, No leak


Cell shall first be charged according to standard charge method, and then:
1.Reduce the chamber temperature to -40℃ within 60min and maintain this
temperature for 90min.
2.Raise the chamber temperature to 25℃ within 60min.
3. Raise the chamber temperature to 85℃ within 90min and maintain this

temperature for 110min.

4. Reduce the chamber temperature to 25℃ within 70min. 5.Repeat the sequence for a further 4 cycles.



5.5.9


Low pressure



No fire,No explode,


Cell shall first be charged according to standard charge method, and then put the cell


5.5.10


Impact test


No flame,No fire,No explode


Cell shall first be charged according to standard charge method,then the
battery cell was placed on a flat surface so that the longitudinal axis of the

battery cell shall be parallel with it.

A 15.8mm diameter bar is to be placed across the center of the sample. A.9.1kg weight is to be dropped from a height of 61cm on the sample.



5.5.11


Incineration


When subjected to the

After full charging by the standard method, each test sample cell or
battery is to be placed on a platform table having a 4-inch diameter hole in
test no part ofthe center covered by a screen. The screen over the hole is to be steel wire
exploding cell shallmesh having 20 openings per inch and a wire diameter of 0.017 inch An
penetrate from theeight-sided covered wire cage, 2 feet across and 1 foot high is covered
screen such that somewith a metal screen is to be constructed from 0.010inch diameter wire
testor all the cell orwith 16-18 wires per inch in each direction. This wire cage is placed over
battery protrudesto the test sample. The sample is to be placed on the screen covering the
through the screenhole in the center of the hole. It is to be heated until it explodes, or until it

Note


All above safety tests will be conducted at 25℃±2℃ except where specified differently. Use proper ventilation with protective equipment.



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