INR18650-2600mAh Li-ion Rechargeable cylindrical battery,2600mAh Li-ion battery,18650 battery ,Long life lithium ion battery

1

Discharge rate capabilities

A）1 C5A ≥100% B）10 C5A ≥95% C）15 C5A ≥90%

Standard charged under the condition of normal atmospheric pressure and the environmental temperature of 23℃±3℃ and45%～85%RH, then rest for 30mins and discharge at1C5A、5 C5A、10 C5A to the discharge cut-off voltage respectively. Charge/discharge cycle can be conducted for 3times before meeting the Standards（the same below）

2

capacity retention and recovery

Residualcapacity≥94％ Recoverablecapacity≥*98％

Standard charged under the condition of normal atmospheric pressure and the environmental temperature of 23℃±3℃， Stored for 28 days, then discharge at 0.2 C5A to 2.75Vmeasuring residual capacity; Then standard charge/discharge measure recoverable capacity.

3

Low Temperature Performance

discharge capacity≥85% rated capacityno distortion and no rupture

The cell shall be charged in accordance with the standard charge. Then stored in the temperature of -10℃±1℃ for4h, Discharge at the constant current of 0.2C5A down to the end-of-discharge voltage 2.75V.

4

Cycle Life

≥300cycles

Charge: The cell shall be charged in accordance with RapidCharge condition. rest for 10mins.Discharge: 10C5A discharge to 2.75V, one cycle is finished, then rest for 30mins. Then repeat above steps, when capacity is less than 80% of initial capacity, the battery life is over.

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.

1

Altitude/Low pressure simulation test

no leakage, no fire, no explosion

The full charged cells are to be stored for 6h at an vaccum environment with pressure of less than 11.6kPa and atemperature of 23℃±3℃.

2

Free drop test

no fire, no explosion

The fully charged battery drops on the concrete ground from height(1m),total 3 times,to obtain the shock of random directions.

3

Vibration test

No remarkable damage/No smoking ,No explosion

After standard charging, fixed the cell to vibration table and subjected to vibration cycling that the frequency is to be varied at the rate of 1Hz per minute between 10Hz and 55Hz,the excursion of the vibration is 1.52mm. The cell shall be vibrated for 90 minutes per axis of x, y axes.