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Quick Details

  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: BCC
  • Model Number: 18650
  • Type: Li-Ion
  • Nominal Voltage: 3.7v
  • Size: 18 x 65mm
  • Nominal Capacity: 1400mAh
  • Capacity: Higher than its actual capacity
  • Certificate: UL, CE, ROSH
  • Warranty: 18 months
  • Cycle Life: 2000 cycles

Packaging & Delivery

Packaging Details Carton or with Customer's requirement
Delivery Time 8 days after confirming order

1.Key Specification of lifepo4 battery cell 18650

 

No.

Item

General Parameter

Remark

1

Rated Capacity

Typical

1400mAh

Standard discharge(0.2C5A) after standard charge

Minimum

1350mAh

2

Nominal Voltage

3.2V

Mean Operation Voltage

3

Voltage at end of Discharge

2.0V

Discharge Cut-off Voltage

4

Charging at end of Voltage

3.65V

 

5

Standard charge

Constant Current 0.2C5A Constant Voltage 3.65V 0.02C5A cut-off

 Charge time:Approx 6.0h

6

Standard discharge

Constant Current 0.2C5A end Voltage 2.0V

 

7

Fast charge

Constant Current 1C5A Constant Voltage 3.65V 0.01C5A cut-off

Charge time:Approx 2.5h

8

Fast discharge

Constant Current 1C5A end Voltage 2.0V

 

9

Maximum Continuous Charge Current

1C5A

 

10

Maximum Continuous Discharge Current

3C5A

 

11

Operation Temperature Range

Charge:0~45℃

60±25%R.H. Bare Cell

12

Storage Temperature Range

(1)Less than 1 year:-20~25℃

(2)Less than 3 months:-20~40℃

60±25%R.H. at the shipment state

13

Weight

Approx:38g

FYI

14

Pack Dimension

Height:(65.0±0.3mm)Diameter: (18.1±0.3mm)

Initial Dimension

 

  

 

 

 

 2. Advantage 

1.   Lifepo4 18650 3.2V 1400mAh ;

2. 18650 3.7v battery lithium ion;

3. Higher energy density and lower weight than other types of rechargeable batteries;

 4. Manufactured under ISO9001 to assure quality;

5. Internal PCB protects against under and over charging - low voltage 2.8V, high  voltage 4.2V;

6. Battery tested based on International Electrotechnical Commission (IEC) standard  to ensure capacity, quality and life time;

7. High capacity, long work time and cycle lifespan;

8. Tags, plugs, connectors PCM/PCB are available;

9. OEM and ODM orders are welcome;

10. Used for Flashlights, emergency lighting, Portable equipment: Laptop, camcorder, PDA, Digital camera, portable DVD, Home appliances: two-way radio, walkie-talkie, electric toys, Fire fighting, safety device, and alarm monitoring etc.

 

3. Performance and test condition

Standard Test Conditions

    Test should be conducted with new batteries within one week after shipment from our factory and the cell shall not be cyded more than five times before the test. Unless otherwise specified,test and measurement shall be done under temperature of 20±5℃ and relative humidity of 45~48%.if it is judged that the test results are not affected by such conditions,the tests may be conducted at temperature 15~30℃ and humidity 25-85%R.H.

Measuring Instrument or Apparatus

Dimension Measuring Instrument

The dimension measurement shall be implemented by instruments with equal or more precision scale of 0.01mm.

3.2.2 Voltager

     Standard class specified in the national standard or more sensitive class having inner impedance more than 10kΩ/V.

Ammeter

Standard class specified in the national standard or more sensitive class.Total extermal resistance including ammeter and wire is less than 0.01Ω.

Impedance Meter

Impedance shall be measured by a sinusidal alternating current method(1kHz LCR meter)

Standard Charge/Discharge

Standard charge:Test procedure and its criteria are referred as follows:

0.2C5A=

Charging shall consist of charging at a 0.5 C5A constant current rate until the cell reaches 3.65V. The cell shall then be charged at constant voltage 0f 3.65 volts while tapreing the charge current Charging shall be terminated when the charging current has tapreed to 0.02 C5A.Charge time:Approx 6.0h,The cell shall demonstrate no permanent degradation when charged between 0℃ and 45℃.

Standard Discharge

0.2 C5A=

Cells shall be discharged at a constant current of 0.2 C5A to 2.0 volts @20℃±5℃.

If no otherwise specified, the rest time between Charge and Discharge amount to 30min.

 

Appearance

   There shall be no sucu defect as flaw, crack, rust, eakage, which may adversely affect commercial value of battery.

 

4. Initial Performance Test

Initial Performance Test

Item

Test Method Condition

Requirements

(1)       Open-circuit Voltage

The open-circuit voltage shall be measured within 24 hours after standard charge.

 

(2)       Intermal impedance

Intermal resistance measured at AC 1KHz after 50% charge.

 

(3)       Minimal Rated Capacity

The capacity on 0.2 C5A discharge till the voltage tapered to 2.0V shall be measured after rested for 30min then finish standard charge.

Discharge Capacity

 

 

 5.  Cycle life and leakage proof  

 

No.

Item

Criteria

Test Conditions

1

Cycle Life

(0.5 C5A)

Higher than 70% of the Initial Capacities of the Cells

Carry out 2000 cycle

Charging/Discharging in the below condition.

-Charge: Standard Charge,

-Discharge:0.5 C5A to 2.0V

-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.

 

 

6.Mechanical Characteristic

No.

Item

Test Method and Condition

Criteria

1

Vibration Test

After standard charging, fixed the cell to vibration table and subjection cycling that the frequency is to be varied at the rate of 1Hz per minute between 10Hz an 55Hz, the excursion of the vibration is 1.6mm.The cell shall be vibrated for 30minutes per axis of XYZ axes.

No leakage

No fire

2

Drop Test

The cdll is to be dropped from a height of 1 meter twice  onto concrete ground.

No explosion, No fire,no leakage.

 

 

7. 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

( 20 )

Fresh,Fully charged

Each test sample battery,in turn,is to be short-circuited by connecting the (+)and (-) terminals of the battery with a Cu wire having a maximum resistance load of 0.1Ω. Test 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-circuited by connecting the (+)and (-) terminals of the battery with a Cu wire having a maximum resistance load of 0.1Ω. Test are to be conducted at temperature (60℃±2℃).

No explosion, No fire. The Temperature of the surface of the Cells are lower than 150℃

Impact

Fresh, Fully charged

A 56mm diameter bar is inlayed into the bottom of a 10Kg weight. And the weight is to be dropped from a height of 1m onto a sample 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 C for 2.5h.

No explosion, No fire

Nail Pricking

(3mm)

Fresh, Fully charged

Prick through the sample battery with a nail having a diameter of 3mm and remain 2h.

No explosion,No fire

  

8.PCM Specification

Item

Test Condition

Over charge Protection

The battery should be charged under 4.0V/1C.The charging should be shut off when the internal cell voltage becomes more than the specified protection voltage.

Overs discharge Protection

The battery should be discharged with 1C. The discharging should be shut off when the internal cell voltage becomes less than the specified protection voltage.

Short protection

After rated charge,(+) and (-) terminals are connected with 10mΩ mental resistor or equivalence.

 

9. Handling of cells

    Prohibition short circuit

    Never make short circuit cell. It generates very high current which causes heating of the cells and may cause electrolyte leakage are very dangerous.

    The Li-Fe tabs may be easily short-circuited by putting them on conductive surface.

    Such outer short circuit may lead to heat generation and damage of the cell.

    An appropriate circuitry with PCM shall be employed to protect accidental short circuit of the battery pack.

 

10. Notice for designing battery pack

   10.1 Pack toughness

Battery pack should have sufficient styength and the Li-Fe cell inside should be protected from mechanical shocks.

   10.2 Cell fixing

   The Li-Fe cell should be fixed to the battery pack by its large surface area.

   No cell movement in the battery pack should be allowed.

   10.3 Inside design

   No sharp edge components should be insides the pack containing the Li-Fe cell.

   10.4 Tab connection

   Spot welding is recommended for Li-Fe tab connection method.

   Battery pack should be designed that shear force are not applied to the Li-Fe tabs.

   If apply manual solder met hod to connect tab with PCM.below notice is very important to ensure battery performance:

(1) The solder iron should be temperature controlled and ESD safe;

(2) Soldering temperature should not exceed 350℃;

(3) Soldering time should not be longer than 3s;

(4) Soldering times should not exceed 5 times, Keep battery tab cold down before next time soldrictly g;

(5) Directly heat cell body is strictly prohibited, Battery may damaged by heat above approx.100℃.

   10.5 For mishaps

         Battery pack should be designed not to generate heat even when leakage occurs due to mishaps.

(1) Isolate PCM (Protection Circuit Module) form leaked electrolyte as perfectly as perfectly as possible.

(2) Avoid narrow spacing between bare circuit patterns with different voltage.(Including around connector)

(3) Li-Fe battery should not have liquid from electrolyte, but in case if leaked electrolyte as possible touch bare circuit patterns, higher potential terminal material may dissolve and precipitate at the lower potential terminal,and may cause short circuit, The design of the PCM must have this covered.

 

11.Storing the Batteries

     The batteries should be stored at room temperature, charged to about 30% to 50% of capacity.

We recommend that batteries be charged about once per half a year to prevent over discharge.

 

12.Period of Warranty

     The period of warranty is half a year from the date of shipment. BCC guarantees to give a replacement in case of cells with defects proven due to manufacturing process instead of the customer abuse and misuse, and also bear part of the shipment fee.

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