3.6V Samsung-INR21700-50S Battery
INR21700-50S
The 21700 Samsung 50S(INR21700-50S) model is one of the newer models on the market. It could be used in high-performance devices, battery packs, E-Bikes, power tools, and more. It has a 5000mAh capacity and 25A maximum continuous discharge
HIGHLIGHTS OF Samsung INR21700 50S
- Cut-off Voltage: 2.50V
- Nominal Voltage: 3.60V
- Max Voltage: 4.2V ± 0.05V
- Nominal Capacity: 5000mAh (Max)
- Max Continuous Rated Discharge: 25A
- Max Non-Continuous Rated Discharge: 45A
MIND
Do not incinerate;
Do not disassemble;
Do not short positive and negative contacts;
Do not expose to heat;
Do not completely discharge;
Do not use force to install a li-ion battery;
Use only high quality battery charger;
Charge fully before first use;
Store in cold and dry place at approximately nominal voltage
APPEARANCE
There shall be no such defects as deep scratch, crack, rust, discoloration or leakage, which may adversely affect the commercial value of the cell.
Diameter : Max. 21.45 mm
Diameter is defined as the largest data value measured on the “A” area of a cylindrical cell.
Height :Max. 70.55 mm
Nominal Specification of Samsung-21700-50S
| Item | Specification |
| Standard discharge capacity | Typ. 3,000mAh |
| Charge: 0.5C (2.5A), 4.20V, 0.05C(250mA)cut-off | |
| Discharge: 0.2C (1A), 2.5V cut-off *1C=5,000mA | |
| Rated discharge capacity | Min. 4,800mAh |
| Charge: 1.2C(6A), 4.20V, 0.02C(100mA)cut-off | |
| Discharge: 10A , 2.5V cut-off | |
| Nominal voltage | 3.6V |
| Standard charge | CCCV, 2.5A, 4.2V, 250mA cut-off |
| Rated charge | CCCV, 6A, 4.20 V, 100mA cut-off |
| Charging time | Standard charge : 150min / 250mA cut-off( |
| Rated charge: 100min / 100mA cut-off | |
| Max. continuous discharge(Surface Temperature) | 25A(Without temperature cut) |
| 45A(With 80℃ temperature cut) | |
| Discharge cut-off voltage/End of discharge | 2.5V |
| Max. charge current | 10A (for step charge) |
| 6A (continuous charge) | |
| Cell weight | 72.0g max |
| Cycle life | ① Capacity ≥ 2,940mAh @ after 250cycles(60% of the standard capacity) - Charge : 6A, 4.20V, CCCV 100mA cut-off - Discharge: 25A , 2.5V cut-off |
| ② Capacity ≥ 2,940mAh @ after 100cycles(60% of the standard capacity) - Charge : 6A, 4.20V, CCCV 100mA cut-off - Discharge: 45A, 2.5V cut-off (80℃ cut-off, re-discharge release < 50℃) |
|
| Retention characteristics | Capacity recovery(after the storage) ≥ 4,320 mAh(90% of the rated capacity @ RT) - Charge : 6A, 4.20V, CCCV 100mA cut-off @ RT - Storage : 30 days (@ 60℃) - Discharge : 10A , 2.5V cut-off |
| Cell dimension | Height : Max 70.62mm |
| Diameter : Max 21.25mm | |
| Operating temperature( Ambient) | Charge : 0 to 60℃ |
| Discharge: -20 to 60℃ | |
| Operating temperature(*2 Surface) | Charge : 0 to 60℃(recommended recharge release < 45℃) |
| Discharge: -20 to 80℃(must re-discharge release < 60℃) | |
| Operating temperature(For safety certificate) | Charge : -10 to 60℃ |
| Recovery 90% after storage(*3) | 1 year 0~25℃ |
| 3 months 0~45℃ | |
| 1 month 0~60℃ |
Note (*¹): Protection function of the battery pack should be set within the specified charge, discharge and temperature range in Cell Specification.
Note (*2 ): Discharge OTP(over temp. protection) should not be over 80℃ of temperature. Protection set should be based on the location of the cell surface with the highest temp increase part of the battery pack.
Note (*3 ): If Cell is kept as ex-factory status (30% of charge), the capacity recovery rate shall be more than 90%
Characteristics
Standard charge
This ” Standard charge” means charging the cell CCCV with charge current 0.5C (2,500mA), constant voltage 4.2V and 250mA cut-off in CV mode at 23℃ for capacity.
Rated charge
Rated charge means charging the cell CCCV with charge current 6A and 100mA cut-off at 23℃
Standard discharge capacity
The Standard discharge capacity is the initial discharge capacity of the cell, which is measured with discharge current of 1000mA(0.2C) with 2.5V cut-off at 23℃ within 1hour after the Standard charge. Which complying to the typical capacity of IEC61960 standard Typical capacity is the capacity considering production dispersion, and minimum capacity is allowed up to △2% of typical capacity.
Rated discharge capacity
The rated discharge is the discharge capacity of the cell, which is measured with discharge current of 10A with 2.5V cut-off at 23℃ within 1hour after the rated charge.
Rated discharge capacity ≥ 4,800mAh
Initial internal impedance
Initial internal impedance measured at AC 1kHz after Rated charge
Initial internal impedance ≤ 14mΩ
Temperature dependence of discharge capacity
Capacity comparison at each temperature, measured with discharge constant current 10A and 2.5V cut-off after the rated charge is as follows.
| Discharge temperature | ||||
|---|---|---|---|---|
| -20℃ | -10℃ | 0°C | 23°C | 60℃ |
| 80% | 85% | 85% | 100% | 95% |
Note:
If charge temperature and discharge temperature is not the same, the interval for temperature change is 3 hours. Percentage index of the discharge at 23℃ at 10A (=4,800mAh) is 100%.
Temperature dependence of charge capacity
Capacity comparison at each temperature, measured with discharge constant current 10A and 2.5V cut-off after the rated charge is as follows.
| Charge temperature | Discharge temperature | ||||||
| 0℃ | 5℃ | 23℃ | 45℃ | 50℃ | 60℃ | 23℃ | |
| Relative capacity | 90% | 90% | 100% | 95% | 95% | 90% | |
Note:
If charge temperature and discharge temperature is not the same, the interval for temperature change is 3 hours. Percentage as an index of the rated discharge at 23℃ at 10A (=4,800mAh) is 100%.
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