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Specificaion: | No | Item | General Parameter | Remark | ||||
| 1 | Rated Capcity |
| Standard discharge (0.2C5 A) after Standard charge | ||||
| 2 | Nominal Voltage | 7.4V | Mean Operation Voltage | ||||
| 3 | Voltage at end of Discharge | 5.5V | Discharge Cut-off Voltage | ||||
| 4 | Charging Voltage | 8.4v ± 0.03V | |||||
| 5 | Internal Impedance | ≤ 220m Ω | Internal resistance measured at AC 1KHZ after 50% charge new batteries that within one week after shipment and cycles less than 5 times | ||||
| 6 | Standard charge | Constant Current 0.2C5A CONSTANT VOLTAGE 8.4v 0.01 C cut- off | Charge time : Approx 5.2h | ||||
| 7 | Standard discharge | Constant current 0.2C5A end voltage 5.5V | |||||
| 8 | Fast charge | Constant Current 0.5C Constant Voltage 8.4V 0.01 C cut-off | Charge time :Approx 2.5h | ||||
| 9 | Fast discharge | Constant current 1 C end voltage 5.5V | |||||
| 10 | Maximum Continuous Charge Current | 1C | |||||
| 11 | Maxiumum Continuous Discharge Current | 1C | |||||
| 12 | Operation Temperature |
| 60 ±25% R.H Bare Cell | ||||
| 13 | Storage Temperature Range |
| 60 ± 25 % R.H at the shipment state | ||||
| 14 | Pack Dimension |
| Initial Dimension |
2. Cycle Life and Leakage -Proof :
| No | Item | Criteria | Test Conditions |
| 1 | Cycle Life | Higher than 80% of the Initial Capacities of the Cells | Carry out 500 cycle Charging / Discharging in the below condition. Charge : Standard Charge Discharge : 0.2 C5A to 5.5V Rest Time between charge /discharge :30min Temperature :20 ± 5 ℃ |
| 2 | Leakage- Proof | No leakage (visual inspection) | After full charge with standard charge,store at 60 ±3℃, 60 ±10% RH for 1 month |
3.Safety Test :
Item
| Battery Condition | Test Method | Requirements |
Crush
| Fresh,Fully charged | Crush between two flat plates , Applied force is about 13kN (1.72Mpa) for 30min | No explosion / No fire |
Short Circuit
| Fresh,Fully charged | Each test samples battery ,in turn ,is to be short- circuited by connectiong the (+) and (-) terminals of the battery with a Cu wire having a maximum resistance load of 0.1 Ω,Tests are to be conducted at room temperature(20±2℃) | No explosion No fire ,The Temperature of the surface of the Cells are lower than 150℃ |
Short Circuit 60℃
| Fresh,Fully charged |
Each test sample battery ,in turn , is to be short cisuited by connecting the (+) and (-) terminals of the battery with a Cu wire having a maximum resistance load of 0.1 Ω.Tests are to be conducted at temperature (60±2℃)
| No explosion No Fire , The Temperatue of the surfase of the Cells are lower than 150 ℃ |
Impact | Fresh ,Fully charged | A 56mm dimeter bar is inlayed into the bottom of a 10kg weight ,And the weight is to be dropped from a height of 1 m onto a samples battery and then the bar will be across the center of the sample | No explosion ,No Fire |
Forced Discharge
| Fresh,Fully charged | Discharge at a current of 1 C5 A for 2.5h | No explosion ,No Fire |
4. Period of Warranty :
The period of warranty is half a year from the date of shipment. CYCLEN guarantees to give a
replacement in case of cells with defects proven due to manufacturing process instead of the customers
abuse and misuse.
5. Other the Chemical Reaction :
Beacuse batterues ultilize a chaemical recation , battery performace will deteriorate over time even if store for long period of time without being used , In addition , if the various usage conditions such as charge, discharge, ambient temperature, etc , are not maintained within the specified ranges the life expectancy of the battery may be shortened orr the device in which the battery is used may be samaged by elextrolyte leakage,If the batteries cannot maintain a charge for long periods of time , even when they are charged correctly, this may indicate ti is time to change the battery .
