锂电池特性分析ICR18650Spec PRODUCT SPECIFICATION 1. Customer :
2. Product : Cylindrical Lithium Ion Cell
3. SDI Model : ICR18650-20
4. Buyer Model
5. Received Marking
D ivision
Signature
D ate//////
6. Date of application (DD/MM/YY) : / /
7. Supplier : SAMSUNG SDI Co., Ltd.
Mobile Energy Business Team
1. Scope
This Product Specification has been prepared to specify the rechargeable lithium-ion cell ('Cell') to be supplied to the customer by Samsung SDI Co., Ltd.
2. Description and Model
2.1 Description Cell (lithium-ion rechargeable cell)
2.2 Model ICR18650-20
3. Ratings
3.1 Nominal Capacity 2000mAh
3.2 Charging Voltage
4.2 V
3.3 Nominal Voltage 3.7 V (from
4.2 V to 2.75 V)
3.4 Charging Method CC-CV (constant voltage with limited current)
3.5 Charging Current Standard charge : 1000mA
Rapid charge : 2000mA
3.6 Charging Time Standard charge : 3 hours
Rapid charge : 2.25 hours
3.7 Max. Charge Current 2000mA
3.8 Max. Discharge Current 3300mA
3.9 Discharge Cut-off Voltage 2.75 V
3.10 Cell Weight Approx. 4
4.0 g
3.11 Cell Dimension Height(max.) : 65.00 mm
Diameter(max.) : Φ18.25 mm
3.12 Operating Temperature Charge 0 ~ 45℃
Discharge -20 ~60℃
3.13 Storage Temperature 1 year -20~20℃(*1)
3 month -20~45℃(*1)
1 month -20~60℃(*1)
Note (1): If the Cell is kept as ex-factory status(50% of charge),
the Capacity Recovery Rate is more than 80%.
4. Outline Dimensions
See the attachment.(Fig. 1)
5. Appearance
There shall be no such defect as scratch, rust, discoloration, leakage which may adversely affect commercial value of the Cell.
6. Standard test conditions
6.1 Environmental Conditions
Unless otherwise specified, all tests stated in this specification are conducted at temperature 23±5℃and humidity 65±20%.
6.2 Measuring Equipment
(1) Ammeter and voltmeter
The ammeter and voltmeter should have an accuracy of
the grade 0.5 or higher.
(2) Slide caliper
The slide caliper should have 0.05 mm scale.
(3) Impedance meter
The impedance meter with AC 1kHz should be used.
7. Characteristics
7.1 Standard Charge
This "Standard Charge" means charging the Cell with charge current
1000mA with constant voltage 4.2V at 23℃for 3hours.
7.2 Initial capacity
The initial capacity is the initial discharge capacity of the Cell, which is measured with discharge current of 400mA with 2.75V cut-off at 23℃
within 1 hour after the Standard Charge.
Initial Capacity ≥1950mAh
7.3 Cycle Life
Each cycle is an interval between the charge (charge current 1000mA) and the discharge (discharge current 2000mA) with 2.75V cut-off.
Capacity after 299cycles and plus 1 day, measured under the same condition in 7.2
Capacity ≥1400mAh
7.4 Initial internal impedance
Initial internal impedance measured at 1kHz after Standard Charge.
Initial internal impedance ≤100m?
7.5 Temperature Dependence of Discharge Capacity
Capacity comparison at each temperature, measured with discharge constant current 1000mA with 2.75V cut-off after the Standard Charge is
as follows.
C h arg e tem p eratu re
D isch arg e tem p eratu re
23℃-10℃0℃23℃45℃R elativ e cap acity50%80%100%100%
Note: If charge temperature and discharge temperature are not the same,
the interval for temperature's change is 3 hours.
Percentage as an index of the capacity at 23℃is 100% ( 1950mAh).
7.6 Temperature Dependence of Charge Capacity
Capacity comparison at each temperature, measured with discharge constant current 1000mA with 2.75V cut-off after the Standard Charge is
as follows.
Note: If charge temperature and discharge temperature are not the same,
the interval for temperature's change is 3 hours.
Percentage as an index of the capacity at 23℃is 100% ( 1950mAh).
7.7 Storage Characteristics
Capacity after 30 days storage at 23℃from the Standard Charge,
measured with discharge current 1000mA with 2.75V cut-off at 23℃.
Capacity Retention(after the storage) ≥1600mAh
7.8 Status of the cell as of ex-factory
The cell should be shipped in 50% charged state. In this case, OCV is from 3.65V to 3.85V.
8. Mechanical Characteristics
8.1 Drop Test
Test method:
Cell(as of shipment or full charged) drop onto the oak-board
(thickness: ≥30mm) from 1.5m height at a random direction 6 times.
Criteria: No leakage
Recovery rate(*2) ≥90%
8.2 Vibration Test
Test method:
Cell(as of shipment) is vibrated for 90minutes along 2 mutually
perpendicular axes with total excursion of 1.6mm and with
frequency cycling between 10Hz and 55Hz by 1Hz/min.
Criteria: No leakage
Recovery rate (*2) ≥90%
Note(2): Recovery rate is measured by the condition of 7.2 after
leaving cells at 23℃for 3hours.
9. Safety
9.1 Overcharge Test
Test method:
To charge the fully charged Cell with 12V and 2.0A at 23℃for 2.5 hours. Criteria: No fire, and no explosion.
9.2 External Short-circuiting Test
Test method:
To short-circuit the Cell charged 4.2V by connecting positive and
negative terminal by less than 50mΩwire for 3hours.
Criteria: No fire, and no explosion.
9.3 Reverse Charge Test
Test method:
To charge the Cell with charge current 2.0A by -12V for 2.5hours.
Criteria: No fire, and no explosion.
9.4 Thermal Ramp Test
Test method:
To heat up the Cell charged at 4.2V at a rate 5℃per minute up to
130℃and keeping the state for 120 minutes.
Criteria: No fire, and no explosion.
10. Warranty
Samsung SDI will be responsible for replacing the cell against defects
or poor workmanship for 1 year from the date of shipping. Any other problem caused by malfunction of the equipment or mix-use of the cell is not under this warranty.
The warranty set forth above or described in Proper Use and Handling excludes a defect which is not related to manufacturing of the Cell.
11. Others
11.1 Storage for a long time
If the Cell is kept for a long time(3 months or more), It is strongly
recommended that the Cell is preserved at dry and low-temperature. 11.2 Other
Any matters that specifications does not have, should be confer with
between the both parties.
12. Packaging
See Fig.2,
Package Drawing
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