18650CA-2P-3J

## **Specification** 

## **of** 

## **Li-ion Rechargeable Battery** 

## **- - Model No.: 18650CA 2P 3J** 

Reported by: 陈声宇 Date: Oct, 17,2013 Checked by: Date： Approved by: Date: 

## **1. Scope** 

This specification describes the definition, technical requirement, testing method, warning 

1 

and caution of the Lithium ion rechargeable battery. 

## **2. Product Model** 

2.1 Battery type:  Lithium ion rechargeable battery pack 

2.2 Model No.:    18650CA-2P-3J 

## **3. Basic Specification** 

|3.1|Nominal voltage|3.7V|
|---|---|---|
|3.2|Nominal capacity|4500mAh (0.2C discharged from 4.2V to<br>2.75V)|
||Minimum capacity|4300mAh (0.2C discharged from 4.2V to<br>2.75V)|
|3.3|Charge voltage|4.20±0.05V|
|3.4|Standard charge current|0.2C(1100mAh)|
||Max charge current|0.5C(10℃≥T≥0℃)|
|3.5|Charge conditions|CC / CV|
|3.6|Max continuous discharge current|0.5C(2250mAh)|
|3.7|Max peak discharge current|1C（4500mA)|
|3.8|Discharge cut-off voltage|2.5V±0.063V|
|3.9|Thermister|10K NTC((±5%)|
|3.10|Internal Impedance|<180mohm (after charged)|
|3.11|Working temperature|Charge:      0 ~ +45℃|
|3.12||Discharge:    -20 ~ +60℃|
|3.13|Storage temperature|-20 ~ +45℃<recommend -0~35℃>|
|3.14|Relative humidity|65±20%|
|3.15|Weight|Approx 95g<for battery pack>|
|3.16|Battery pack dimension|Thickness:  18.5mm<±0.3mm>|
|||Width    :  37.0mm<±0.5mm >|
|||Length   :  69.0mm<±0.5mm >|



2 

## **4. Visual Inspection** 

There shall be no such defects as remarkable scratches, cracks, bolts, cup cancers, deformations, swelling, leakage. 

## **5. Detailed Specification** 

## 5.1Electrical specification 

|Electrical specification|||
|---|---|---|
|Items|Test conditions|Results|
|5.1.1 Full charge<br><standard charge>|Under 20+<br>5℃, 65±5%RH, it can be charged<br>to 4.2V with constant current of 0.2 C5mA,<br>and<br>then,<br>charged<br>continuously<br>with<br>constant voltage of 4.2V until the charged<br>current is less than 0.02 C5mA.|Remark: it is standard<br>charge method|
|5.1.2 Rated capacity|Under 20±5℃, charge the cell according to<br>above charging method, then, keep it for<br>0.5-1hrs. Discharge the cell with constant<br>current 0.2C5mAto 2.75V, the discharging<br>time is not less then 5 hours.|≥4500mAh|
||Discharge the cell with constant current<br>0.2C5mA to 2.75V firstly, then, charged it for<br>2.5hrs by quick charging, keep it for 30mins.<br>Discharge it with current 1C5mA to 2.75V,<br>this is one cycle. To do the cycle test for 300t<br>times.|Capacity≥at least 80%<br>of the rated capacity|
|5.1.3 Cycle life|||
||||
|5.1.4 Internal<br>impedance|At 1kHz AC with fully charge state|Initial battery pack<br>≤180mΩ|
|5.1.5 Temperature<br>performance|**Hi-temperature:**At 20±5℃, charge the cell according to standard<br>charge, then, keep it in the oven of 55±2℃for 2hrs. Discharge the cell<br>with constant current of 0.5 C5mA to 2.75V, the discharging time should<br>be not less than 51 minutes.||
||**Low temperature:**At 20±5℃, charge the cell according to standard<br>charge, then, keep it in the oven of -20±2℃for 16～24 hrs. Discharge<br>the cell with constant current 0.2 C5mA, the discharge time should be<br>not less than 3hrs.||
||**Constant temperature & humidity:**At 20±5℃, charge the cell<br>according to standard charge, then, keep it in 40±2℃& 90~95%RH for<br>48hrs, after this, keep the cell in 20±5℃for 2hrs. Discharge the cell with<br>constant current of 0.5 C5mA to 2.75V, the discharge time should be not<br>less than 36mins.||
|5.1.6<br>Storage|Storage for 28 days at 25℃.|Capacity≥80%|
||Storage for 7 days at 60℃.|Capacity ≥85%|



3 

5.1.7 Open circuit As of shipment voltage 

3.7 – 4.0V 

## 6.1 Mechanical specification 

|Items|Test conditions|Test conditions|
|---|---|---|
|6.2.1 Vibration<br>test|At 20±5℃& normal atmospheric pressure, charge the cell according to<br>standard charge. Then, vibrated it 10 times in each direction of X, Y, Z with<br>changing frequency of 10~55HZ and amplitude of 0.35mm, the rate of scan<br>frequency is from 10~55HZ per min. After above test, to keep the battery at<br>20±5℃for 30mins, the battery cannot be break, scratch, distortion,<br>contamination and leakage,and the Voltage is not less than 3.6V.||
|6.2.2<br>Free fall<br>testing|At 20±5℃, charge the cell by standard charging, then drop it freely for six<br>times in each direction of X, Y, Z from the height of 1000mm onto the hard<br>board with the thickness of 20mm. After above testing, to keep the cell at<br>(20±5)℃for 1-2hrs, the cell cannot be break, scratch, distortion,<br>contamination and leakage. Discharge the cell to 2.75V with constant<br>current 0.2 C5mA, it should be discharged and the discharge time should<br>be not less than 51 minutes.||
|Secure Specification|||
|Items||Test conditions|
|6.3.1 Impact<br>Testing||At 20±5℃, full charge the cell by standard charge, then, place the cell on<br>the impact flat, a 10kgs weight dropped from 1m height onto cell, distortion<br>is allowed. After above testing, to keep the battery at 20±5℃for 1-2hrs, the<br>cell should be not exploded or catch fire.|
|6.3.2<br>Heat<br>impact<br>testing||Put the cell into a air oven, the temperature in the oven should rise at the<br>rate of speed of (5±2℃)/min to be 130℃±2℃, keeping the temperature for 30<br>min,the cell should be not explosion,fire or fume.|
|6.3.3<br>Short-circuit test||At 20±5℃, full charged the cell by standard charge firstly, short-circuited it<br>by max resistance of 50mΩ by connecting the positive and negative<br>terminals of cell with copper wire, Monitor its temperature while testing,<br>finish the test when the cell case temperature was 10℃lower than the peak<br>temperature. The cell should be not explosion,fire.|
|6.3.4 Over-charged<br>test||Connect the cell with a CC/CV power, then, charge the cell to 4.6V with<br>constant 3A current, and last for 2hrs. The cell shall be not explode and<br>fire.|
|6.3.5 Over-discharg<br>ed test||At 20±5℃, charged the cell by standard charge firstly, then, discharge it<br>with constant current 0.2 C5mA to 2.75V. Connected with external load of<br>30Ω for 24hrs. The cell shall be not explode or fire.|



## 6.3Secure Specification 

## **7. Test Conditions** 

4 

Temperature ：25±2℃ Relative humidity ：65±20% 

## **8. Warranty** 

The period of validity of the cell is 12 months. 

## **9.  Warnings** 

## 9.1 Warning: 

To prevent the possibility of the battery from leaking, heating and explosion. Please observe the following precautions: 

- Don’t immerse the battery in water and seawater. Please put it in cool and dry entironment if no using. 

- Do not use and leave the battery near a heat source as fire or heater. 

- Being charged, using the battery charger specifically for that purpose. 

- Don’t reverse the positive and negative terminals. 

- Don’t connect the battery to an electrical outlet directly. 

- Don’t discard the battery in fire or heater. 

- Don’t connect the positive and negative terminal directly with metal objects such as wire. 

- Do not transport and store the battery together with metal objects such as necklaces, hairpins. 

- Do not strike, throw or trample the battery. 

- Do not directly solder the battery and pierce the battery with a nail or other sharp object. 

## 9.2 Caution: 

- Do not use or leave the battery at very high temperature conditions (for example, strong direct sunlight or a vehicle in extremely hot conditions). Otherwise, it can overheat or fire or its performance will be degenerate and its service life will be decreased. 

- Do not use it in a location where is electrostatic and magnetic greatly, otherwise, the safety devices may be damaged, causing hidden trouble of safety 

- If the battery leaks, and the electrolyte get into the eyes. Do not wipe eyes, instead, rinse the eyes with clean running water, and immediately seek medical attention. Otherwise, eyes injury can result. 

- If the battery gives off an odor, generates heat, becomes discolored or deformed, or in any way appear abnormal during use, recharging or storage, immediately remove it from the device or battery charge and stop using it. 

- In case the battery terminals are dirt, clean the terminals with a dry cloth before use. Otherwise power failure or charge failure may occur due to the poor connection with the instrument. 

- Be aware discharged batteries may cause fire; tape the terminals to insulate them. 

**10. Data sheet for PCM** 

5 

## 10.1.) Performance test Parameter 

## **Main parameter  Topt=25** ℃ 

|<br>**Main parameter  Topt=25**℃|<br>**Main parameter  Topt=25**℃|<br>**Main parameter  Topt=25**℃|<br>**Main parameter  Topt=25**℃|<br>**Main parameter  Topt=25**℃|<br>**Main parameter  Topt=25**℃|<br>**Main parameter  Topt=25**℃|
|---|---|---|---|---|---|---|
|**Item**|**Symbol**|**Description**|**Min**|**Standard**|**Max**|**Unit**|
|Over-charge<br>protection|VCU|Over-charge test Vol|4.325|4.35|4.375|V|
|||Over-charge renew vol|4.125|4.15|4.175|V|
||tCU|Delay time of<br>over-chargeprotection|0.7|1.0|1.3|S|
|Over-discharge<br>protection|VDL|Over-discharge test<br>vol|2.437|2.5|2.563|V|
|||Over-discharge renew<br>vol|2.925|3.0|3.075|V|
||tDL|Delay time of<br>over-dischargeprotection|14|20|26|MS|
|Over-current|VIOV1|Over-current protect<br>test vol|0..085|0.2|0.14|V|
||tIOV1|Delay time of<br>over-currentprotection|8|12|16|MS|
|||Max discharge current||2.0|6.0|A|
|||Renew condition from<br>protection|Disconnect the load||||
|Short-circuit<br>protect|VSHORT|Short-circuit protect<br>test vol|0.55|0.8|1.0|V|
||tSHORT|Delay time of<br>short-circuitprotection|230|300|500|μS|
|Self-discharge|IPDN|Static self-discharge||1.2|2.0|μA|
||IOPE|Internal self-discharge<br>during working<br>condition||4.0|8.0|μA|



## 10.2) PCM BOM list: 

|**No.**|**Code**|**Name**|**SPEC**|**Assembling**<br>**method**|<br>**Unit**|**QTY**|
|---|---|---|---|---|---|---|



6 

|1|U1|Control IC|R5402N102KD|SOT-23-66|PC|1|
|---|---|---|---|---|---|---|
|2|U2|MOSFET|AO8810|TSSOP-8|PC|1|
|3|R1|SMD Resistor|330Ω ±5%|0603|PC|1|
|4|R2|SMD Resistor|1KΩ ±5%|0603|PC|1|
|5|R3|SMD NTC|10 KΩ NTC  ±5%|0603|PC|1|
|6|C1|SMD Capacitor|0.1μF -20/+80% 25V SMD|0603|PC|1|
|7|PCB|board|28*12*1.0mm||PC|1|



## 10.3 PCM layout 

## 10.4 PCM diagram 

7 

## 11. Drawing of battery pack: 

8 

9