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Shenzhen Topband Battery 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 26650BL-3400mAh Rechargeable Lithium Iron Phosphate Cells Green

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Shenzhen Topband Battery Co., Ltd
Country/Region: China
Contact Person:Mr Jerry Yang

3.7V 26650BL-3400mAh Rechargeable Lithium Iron Phosphate Cells Green

Brand Name : Topband
Model Number : 26650BL-3400mAh
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 : LiFePO4
Norminal Voltage : 3.2V
Weight : ≤87g
Nominal Capacit : 3400mAh(0.5C)
Max Continue Discharge Current : 1C
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  1. 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 300mA with 2.75V cut-off at 25℃ within 1hour after the standard charge.

Nominal capacity≥1500mAh


  1. Standard charge method

Under 25±2℃, it can be charged to 3.65V with constant current of 0.5C(1700mA), and then, charged continuously with constant voltage of 3.65V until the charged current is 0.02C(68mA).


  1. Cell type and dimension
    1. Description and model
    2. Description: Cylindrical Li-ion rechargeable cell
    3. Model: 18650AN-1500mAh


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



3400mah(0.5C)

Nominal voltage



3.2V

Charge voltage



3.65±0.03V

Discharge cut-off voltage



2.00±0.03 V

MAX Charge current


2C (not for cycle life);Max continue charge current 1C


Max discharge current


3C 25℃(not for cycle life)


Max continue discharge current


1C

Storage temperature


12 months : -20~25℃

3 months : -20~45℃

1 month : -20~60℃

Humidity range


0~90%RH (non-condensing)

Internal resistance


≤25mΩ (AC Impedance, 1000 Hz)

Cell dimension


Height : 65.5mm

Diameter :26.5mm Max

Weight


≤87g

  1. Technical requirements
  2. Temperature of charge :0~45℃
  3. Temperature of discharge : -20~60℃

Unless otherwise specified, all tests stated according to following:

Voltage meter: The voltage tester internal resistance is ≥ 10 KW/V

Temperature meter: The precision is ≤0.5℃


Electrochemical Characteristics

(Fresh cells, tested at 25±2℃,standard charge and discharge unless otherwise specified.


NO.


ITEM


CRITERION



5.4.1


Discharge rate capability


Test condition:
Temperature : 25±2.℃

Charge: CC/CV 0.5C(1700mA) 3.65V cut off current: 0.02C(68mA) Discharge:CC=3C(10200mA) End-of-discharge Voltage: 2.0V

3C discharge capacity retention ≥ 90%




5.4.2


Charge rate capability


Test condition: Temperature : 25±2.℃

Charge: CC variable values as the follow table; End-of-charge Voltage: 3.65V





5.4.3


Cycle life


Test condition:
Temperature : 25±2℃
Charge: CC/CV 1C (3400mA) 3.65V cut off current: 0.02C(68mA)
Discharge: CC 1C(3400mA); End-of-discharge Voltage: 2.0V
Discharge capacity of 2001th cycle ≥ 80% ;

Original discharge capacity


5.4.4


High-Low temperature discharge performance


Test condition:
Charge: CC/CV 0.5C(1700mA) 3.65V cut off current: 0.02C (68mA)

High temperature discharge: put the cell at 55±3℃ for 5h, then test the discharge capacity;

Discharge: CC 1C(3400mA); End-of-discharge Voltage: 2.00V;

Discharge capacity retention ≥90%;



Test condition:

Charge: CC/CV 0.5C(1700mA) 3.65V cut off current: 0.02C (68mA)

High temperature discharge: put the cell at -20±3℃ for 24h, then test the discharge capacity; Discharge: CC 1C(3400mA); End-of-discharge Voltage: 1.80V;

Discharge capacity retention ≥50%;


5.4.5


Storage performance


Test condition:

Charge: CC/CV 0.5C(1700mA) 3.65V cut off current: 0.02C(68mA); stored at 25℃ for 28 days

Discharge: CC 0.5C(1700 mA ); End-of-discharge Voltage: 2.0V Residual capacity: CC 0.5C(1700 mA ); End-of-discharge Voltage: 2.0V

Recovery capacity: the cell charged as the standard charge method, then discharge at CC

0.5C(1700mA), end of discharge voltage is 2.0V;


Residual capacity after 28days storage ≥ 80% ;

Original discharge capacity


Recovery capacity after 28days storage ≥ 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℃


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.



5.5.2


130℃hot oven test

130℃


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

No leak


at the pressure of 11.6Kpa for 6 hours.



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
is destroyed.


  1. Package picture

Photos


3.7V 1500mAh Rechargeable 18650AN cell- 2 Years Warranty for motive power application

Photos


3.7V 1500mAh Rechargeable 18650AN cell- 2 Years Warranty for motive power application


Photos


3.7V 1500mAh Rechargeable 18650AN cell- 2 Years Warranty for motive power application


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