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18650 Cells Lithium Battery

18650 Cells Lithium Battery

18650 cells Electromagnetic compatibility 1) Electrostatic discharge immunity. The battery pack shall meet the requirements of Class 4 of GB/T17626.2-2006; after the test, its appearance shall be free from obvious deformation, liquid leakage, smoke or explosion, and it can work normally. 2)...
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18650 cells
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Electromagnetic compatibility
1) Electrostatic discharge immunity. The battery pack shall meet the requirements of Class 4 of GB/T17626.2-2006; after the test, its appearance shall be free from obvious deformation, liquid leakage, smoke or explosion, and it can work normally.
2) Conducted disturbance limits. The battery pack shall meet the requirements of Class B of YD/T983-1998; after the test, its appearance shall be free from obvious deformation, liquid leakage, smoke or explosion, and it can work normally.
3) Radiated disturbance limits. The battery pack shall meet the requirements of Class B of YD/T983-1998; after the test, its appearance shall be free from obvious deformation, liquid leakage, smoke or explosion, and it can work normally.
4) Surge (shock) immunity. The battery pack shall meet the requirements of Class 4 of GB/T17626.5-2008; after the test, its appearance shall be free from obvious deformation, liquid leakage, smoke or explosion, and it can work normally. 

(5) Battery management function
1) Display accuracy. The battery pack is equipped with a dedicated battery management system (BMS). The error between the various parameter values   displayed by the BMS and the actual parameter values   of the battery pack should meet the requirements of Table 1.
Table 1 shows the accuracy
parameter name
skills requirement
Voltage
The battery pack is tested according to the regulations, and the charging voltage display accuracy should be better than 1%.
Current
The battery pack is tested according to the regulations, and the charging and discharging current display accuracy should be better than 2.5%.
capacity
The battery pack is tested according to the regulations, and the battery pack capacity display accuracy should be better than 5%.
Battery pack working environment temperature
The battery pack shall be tested according to the regulations, and the temperature display error shall be less than 3 °C.

2)Temperature compensation function. The battery pack should be charged with temperature compensation.


Specification of 18650 Cells

No.

Item

Standard

Note

1

Standard Capacity

1500mAh

0.5C,( current value of 1500mA at 1C)

2

Capacity Range

1450~1550mAh

0.5C

3

Standard Voltage

3.2 V


4

Alternating Internal Resistance

≤40mΩ


5

Charge Conditions

Cut-off Voltage

3.65±0.05V

constant-current charge to 3.65V at 0.5C,constant voltage charge to stop until 0.01C mA

Cut-off Current

0.01C

6

Max. Charging Current

1.5A


7

Discharge Cut-off Voltage

2.5V


8

Standard Discharge Current

0.75A


9

Fast Discharge Current

1.5A


10

Max. Continuous Discharge Current

4.5A


11

Pulse Discharge Current

10A,5s


12

Cycle Characteristic

  2000times(100%DOD)

the residual capacity is no less than 80% of rated capacity at 1C rate.

4000 times(80%DOD)

7000 times(50%DOD)

13

Working Temperature

      Charge:0°C~55°C
 Discharge:-20°C~60°C


14

Storage Temperature

-20°C ~ 45°C

Short-term storage (< 3 months)

15

Battery Weight

41 g (Approx.)



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