High security lithium ion battery

       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

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.