LiFePO4 6.4V 18Ah 21700 Cylindrical Lithium Ion Battery For EV PHEV

LiFePO4 6.4V 18Ah 21700 cylindrical lithium ion battery for UPS,EV/PHEV/Solar
System,Storage system,Backup power supply.
Product Information:



Type: LiFePO4( Lithium Iron Phosphate) Max Charge: 1C
Max Discharge: 2C Max Pulse Discharge Current: 1C
Internal Impedance: ≤30mΩ Capacity: 18Ah
Cycle Life: ≥2000cycles @ 100% DOD Warranty: 1 Year
Nominal Capacity: 18Ah/customized Nominal Voltage: 6.4V
Weight: 660± 5 g Size: Height:81mm*Length:108*Thickness:68mm
Applicati , on: UPS,EV/PHEV/Solar System,Storage,Starting Power Supply 　 　


Production Description:



1. General

This product specification describes the technique requirements, test procedures
and precaution notes of Cylindrical Lithium-ion phosphate rechargeable cell,
manufactured by Shenzhen AMT Technology Co., Ltd.





2. Cell’s Characteristic:

Sturdy and pressure resistant steel envelope
High capacity
Excellent cycle life
Excellent high and low temperature performance
Steady output voltage
Low self-discharge
Double safety protection
With outstanding high level of vibrations and shocks
LiFePO4 6.4V 18Ah 21700 Cylindrical Lithium Ion Battery For EV PHEV 0

LiFePO4 6.4V 18Ah 21700 Cylindrical Lithium Ion Battery For EV PHEV 1





3. Electrochemical Performance

Test Item Test Method Criteria
AC Impedance Cell shall be measured at 1000 Hz after charged per standard
charging. ≤ 30 mΩ
Initial Capacity Cell shall be charged standard per charging. and discharged
per standard discharging within 1h after full charge. Cini ≥18Ah
Cycle Life Cell shall be charged at CC/CV mode(CC: 1 C, CV: 3.65 V, End-of-
charge current: 0.05 C);
After stored for 30 min, cell shall be discharged at CC mode(1 C, End-of-charge
voltage: 2.0 V);
After stored for 30 min, tests shall be continued for 2000
times. Capacity retention ≥ 80 %
High-rated Discharging Performance Cell shall be charged per standard
charging, and discharged at 6C to ending voltage at RT. Discharge Capacity:
≥ 90%Cini
Low Temperature
Performance Cell shall be charged per standard charging and stored in
atemperature-controlled environment for 4h.Then
discharged cell at 1C to ending voltage. Discharge Capacity:
≥ 70%Cini(-20°C)
Room Temperature Storage Test Cell shall be charged per standard charging, then
stored at 25 °C ±2 °C for 28 days. Finally discharged cell at 1 C to ending
voltage. Capacity retention ≥90%
High Temperature Storage Test Cell shall be charged per standard charging, then
stored at 55 °C ±2 °C for 7 days. After standing for 5h,discharged cell per
standard discharging. Capacity retention ≥ 90 %
Remark: 1.“Standard Charging” means that in standard test conditions, charge the
cell at a constant current of 1 C until the voltage reaches 3.65 V, then charge it
at a constant voltage of 3.65 V until the current decreases less than 0.05 C and
placed for 1 h. 2.“Standard Discharging” means that in standard test conditions,
discharge the cell at a constant current of 1 C until the voltage reaches 2.0 V.


4. Reliability Test

Constant Temperature and Humidity Test Cell shall be charged per standard
charging, and stored in 45 °C ±2 °C (90~95% RH) for 48 h. Then be placed in RT
for 2h and
checked for 1h. No distortion, no rust, no fume and no explosion.
Thermal Shock Test Cell shall be charged per standard charging and put into an
oven.Temperature inside the oven will drop to -40 °C in 60min and remain for 90
min. Then it will rise to 25 °C in 60 min
and keep rising to 85 °C in 90 min, following by remaining for 110 min. And it
will drop to 25 °C in 70 min.Repeat this process for 5 times, then check it for
1h. No explosion, no fire, no
leakage.

Low-pressure Test Cell shall be charged per standard charging, then stored it
for 6h at an absolute pressure of 11.6 kPa (RT). Check it for 1h. No
explosion, no fire, no
leakage.
Drop Test Cell shall be charged per 3.2, then dropped from a height of 1.5 m
onto the concrete ground. Positive and negative terminals of cells shall be towards
the ground. Check it for 1h. No explosion, no fire.
Soaking Test Cell shall be charged per standard charging, then completely
soaking into NaCl solution (3.5 wt %) for 2h. Check it for 1h. No explosion, no
fire.


5. Safety Test

External Short-Circuiting Tes Cell shall be charged per standard charging, then
short-circuited by connecting the positive and negative terminals with a resistance
of <5 mΩ for 10 min. Check it for 1h. No explosion, no fire.
Over-charge Test Cell shall be charged per standard charging, then charged
at 1C to ending voltage of 5.5 V or charged at 1C for 1h. Check it for 1h. No
explosion, no fire.
Over-discharge Test Cell shall be charged per standard charging, then
discharged at 1C for 90min. Check it for 1h. No explosion, no fire, no
leakage.
Crush Test Cell shall be charged per standard charging,then crush the cell
perpendicularly to the cell plate at a rate of (5±1) mm/s with a semi-cylinder
(radius of 75 mm). When met any of the following criteria, stopping crushing and
check it for 1h. 1. Voltage reaches 0V;
2. Deformation reaches 30%;
3. Pressure reaches 200 kN. No explosion, no fire.
Acupuncture Test Cell shall be charged per standard charging,then
acupuncture the cell perpendicularly to the cell plate at a rate of (25±5)mm/s
with a ϕ5 mm~ϕ8 mm steel needle and remain it inside.The acupuncturing location
shall be near the geometric center of plane. Check it for 1h. No explosion, no
fire
Heating Test Cell shall be charged per standard charging, then heated in an
oven.Temperature will rise to 130 °C±2 °C at a rate of 5 °C/min and remain for
30 min. Check it for 1h. No explosion, no fire.

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