Inr18650 A grade Lithium Li Ion 3.7V Battery Cell 2900mah Capacity 29E Samsung SDI
Description
Samsung 29e 2900mAh 18650 cylindrical cell, datasheet as below
Nominal Capacity: 2.85Ah (0.20C, 2.5V discharging)
Typical Capacity: 2,850mAh (0.20C, 2.5V discharging)
Minimum Capacity: 2,750mAh (0.20C, 2.5V discharge)
Charge Voltage: 4.20V ± 0.05
Nominal Voltage: 3.65V (0.20C discharging)
Charge Method: CC and CV (constant voltage with limited current)
Charge Current: Standard charge: 1.375A
Charge Time: Standard charge: 180 minutes
Maximum Charge Current: 2.75A (not for cycle life)
Maximum Discharging Current: 2.75Ah (continuous discharging)
8.25Ah (not for continuous discharging)
Discharging Cut-off Voltage: 2.5V
Maximum Weight: 48.0g
Cell Dimension: Maximum Diameter : 18.4 mm
Maximum Height : 65.0 mm
Operate Temperature: Charge: 0°C to 45
Discharging: -20°C to 60
Storage Temperature: 12 months : -20°C~25
3 months : -20°C~45
1 month : -20°C~60
Specification
Standard Charging: It means charging the cell with charging current of 1.375A and constant voltage 4.2V at 25°C, 0.02C cut off.
Standard Discharging Capacity: The standard discharging capacity is the initial discharging capacity of the cell, which is measured with discharge current of 0.55A and 2.50V cut-off at 25°C within 1 hour after the standard charging.
Standard Discharging Capacity exceed 2.75Ah
Rated Discharging Capacity: The rated discharging capacity is the initial discharging capacity of the cell, which is measured with discharging current of 2.75A with 2.50V cut-off at 25°C within 1 hour after the standard charging
Rated Discharging Capacity exceed 2.668Ah (97 percents of 2.75Ah)
Initial internal impedance: Initial internal impedance measured at AC 1kHz after standard charging.
Initial internal impedance less than 45mΩ
Cycle Life: Each cycle is an interval between the charging (charging current 1.735A) with 0.05C Cut-off and the discharge (discharging current 2.75A) with 2.5V cut-off. Capacity after 500cycles.
Capacity exceed 1.925Ah (70 percents of Rated Capacity)
Storage Characteristics: Capacity after storage for 30days at 60°C after the standard charged (SOC 50 percents under 25°C), measured with discharging current 2.75A with 2.5V cut-off at 25℃.
Capacity recovery(after the storage) exceed 2.4Ah (90 percents of Rated Capacity)
Mechanical Characteristics
Drop Test
Test method: Cell(as of shipment or fullly charged) drop onto the oak-board (thickness exceed 30mm) from 1.0m height at a random direction 6 times.
Criteria: No leakage
Vibration Test
Sample condition: Fully charged state 5 samples
Test Method: 20℃±5 and 0.16cm maximum excursion / 1Hz/minute between 10Hz to 55Hz to 10Hz / for mutually perpendicular directions
Criteria: No ventilation and leakage
Test should be started under the criteria IEC 62133 and UL1642
Safety
Over charging Test
Test method: To charging the standard charged cell with 12V and 2.75A at 25°C for 150 minutes.
Criteria: No fire, and no explosion
External Short-circuit Test
Test method: To short-circuit the standard charged cell by connecting positive and negative terminal by less than 80mΩ±20 wire for 180 minutes.
Criteria: No fire, and no explosion.
Reverse Charging Test
Test method: To charging reversely the standard charged cell with charge current 2.75A for 150 minutes.
Criteria: No fire, and no explosion.
Heating Test
Test method: To heat the standard charged cell at heating rate of 5°C per minute up to 130°C and keep the cell in oven for 1 hour.
Criteria: No fire, and no explosion.
