High security lithium ion battery

INR18650-2500mAh Li-ion Rechargeable cylindrical battery,High security lithium ion battery,rechargeable lithium battery,High temperature resistance lithium ion battery

2500mah Li-Ion Battery Product Details:

       NO. Items Specifications
1 Model INR18650-2500
2 Can Material Ni-Iron
3 Rated Capacity 2500 mAh（0.2C ）
Min. Capacity 2450 mAh（0.2C ）
4 Nominal Voltage 3.7V
5 Max. Charge Voltage 4.2 V
6 Discharge Cut-off Voltage 2.75V
7 Max. Charge Current 2.5 A
8 Standard Discharging Current 1.3 A
9 Max. Continuous Discharge Current 20 A
10 Max. Pulse Discharge Current 30A（ 3s pulse ）
11 Max. Diameter（include PET） ≤18.40 mm
12 Max. Height (include PET) ≤65.50mm
13 Weight (Approx.) 44.0¯1.0g
14 Impedance （Max. at 1000Hz、charged status） ≤ 18 mΩ
15 Charge Method (CC/CV) Standard 0.5 C ×6hrs
Quick 1 C ×1.5hrs.
16 Operating Temperature Charge 0℃～45℃ 32oF～113oF
Discharge -20℃～60℃ -4oF～140oF
Storage -20℃～45℃ -4oF～113oF

Characteristic  for 18650 rechargeable lithium battery wholesale

Without special instructions, the following tests should be done under the condition of : temperature(23℃¯3℃), atmospheric pressure (86KPa～106KPa), relative humidity (45%～85%), and the tests should be done within two
weeks after receiving the products.

the definitions of some nomenclatures of this specification 

standard Charge: Charge with current 0.2C   to limit charge voltage under the condition of23℃¯3℃ surrounding temperature,then change to charge with constant voltage till the current less than or equal to 0.02C .

Safety Characteristic of 18650 High security rechargeable lithium battery
NO. Item Standard Test Method
1 Overcharge No fire、No explosion After standard charge, rest for 10mins; then charge at constant current of 3C5A to 10V.(or charge at 3C5A for 90mins). 
2 Forced discharge No fire、No explosion The battery to be discharged with standard discharging condition, Inverse charge current =1C5A；time: ≥  90mins 
3 Short Circuit test No fire、 No explosion The battery to be fully charged with standard charging condition, and short the positive and negative terminals 
       with wire resistance  ≤50mΩ.Tests are to be conducted at 23℃¯3℃  and at 55℃ ¯5℃, keep 24h or case temperature decline to 20% of the max temperature ,test is over. 
4 Crush test No fire、No explosion A battery is crushed between two flat surfaces. The applied force is 13 kN¯1kN by hydrocylinder, Once the maximum pressure has been obtained or voltage decrease to 1/3 of nominal voltage sharply, then release pressure. 
5 Shock test No fire、No explosion The full charged battery is fixed on shock table, to force a certain shock to three mutual vertical direction, in initial 3ms, the min. average acceleration is 75gn,the peak acceleration is between 125gn and 175gn.
6 Heating test 
       (130®C) No fire、No explosion The cells are fully charged with standard charging condition, and put into incubator with nature air or cycled air convected, heat battery by velocity of 5®C ¯2®C/min to 130®C¯2®C,and maintain for 10mins. 
    7 Temperature 
 Cycling Test no leakage, no fire, no explosion The fully charged batteries are placed in a test chamber and subjected to the following cycles: a) Raising the temperature to 75®C ¯2®C within 30 minutes and maintaining this temperature for 6 hours. b) Reducing the temperature to minus 40®C ¯2®C within 30 minutes and maintaining this temperature for 6 hours. c) Repeating the sequence for a further 9 cycles. d) After the 10th cycle, storing the batteries for 24 hours prior to examination.

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