Samsung 25r 18650 2500mAh 20A Flat Top Lithium Battery Icr18650 Cell
Description
Model name INR18650-25R, manufactured by Samsung SDI Co., Ltd. Energy Business Division.
Nominal discharging capacity: 2.5Ah Charging: 1.25A, 4.20V,CCCV 0.125A cut off, Discharging: 0.20C, 2.50V discharging cut off
Nominal voltage: 3.60V
Standard charging: CC and CV, 1.25A, 4.2V ± 0.05, 0.125A cut off
Rapid charging: CC and CV, 4.0A, 4.2V ± 0.05, 0.1A cut off
Charging time: Standard charging : 3 hours / 0.125 cut off
Rapid charging: 1 hour (at 25℃) / 0.1A cut off
Max. continuous discharging: 20.0A (at 25℃), 60 percents at 250 cycle
End of discharging: 2.50V
Cell weight: 45g max
Cell dimension: Height : 64.85mm ± 0.15
Diameter : 18.33mm ± 0.07
Operate temperature: Charging : 0℃ to 50 (suggested recharge release less than 45℃)
Discharging: -20℃ to 75 (suggested re-discharge release less than 60℃)
Storage environment: 18 months -30℃~25
3 months -30℃ ~45
1 month -30℃ ~60
Note : If battery cell keeps as ex factory status (50%±5 SOC at 25℃), capacity recovery rate > 90 percent of 10A discharging capacity 100 percent is 2.45Ah at 25℃ with SOC 100% after formation.
Mechanical Characteristics
1, Drop test
Test method: Cell (At shipment or fullly charged) drop on a concrete from 1m height at 3 sides.
Standard: No leakage, Voltage decrease less than 25mV, AC iR increase less than 1.0mΩ
2, Vibration test
Test method: To comply to the UN transportation regulation(UN38.3), for each axle (X axle and Y with cylindrical cells) 7 Hz→200 Hz→7 Hz for 15 minutes, repetition twelve times totally 180 minutes, acceleration 1.0g during 7Hz to 18 and 8.0g (amplitude 0.16cm) up to 200 Hz.
Standard: No leakage, and less than 0.01V of OCV drop
Safety
1, Over charging test
Test method: Charging at 20A-20V at 25℃ for 3 hours.
Standard: No fire or explosion.
2, External short circuit test
Test method: To short circuit the standard charged cell (or 50% discharged cell) by connecting positive and negative terminal by 80mΩ wire for 10min.
Standard: No fire or explosion.
3, Reverse charging test
Test method: To charging the standard charged cell with charge current 10A By 0V for 2.5hr.
Standard: No fire or explosion.
4, Heating test
Test method: To heat the standard charging battery cell at ratio 5 ℃ every minute up to 130 ℃ and retain the cell in oven for 10min.
Standard: No fire or explosion.
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