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Hefei Hongye Lithium Energy Science&Technology Co. Ltd.
Contacts:
Lillian
Mobile +wechat+whatsapp:
+86 13570852925
Business phone number:
+86 0551 66105045
Enterprise address:
NO.33 Qiuju Road . High-tech zone . Hefei.Anhui.China
Email:
Lillian.Lee@ecolto.com
Rosie.wang@ecolto.com
Shirley.wo@ecolto.com
CTO: Morley.lee@ecolto.com

Solar battery lifepo4 cell Lithium Ion Battery 3.2v 20Ah
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Description:

Model : 3.2v 20Ah (25℃±2,1C)

Size :20x72x145.3mm

AC Initial Impedance:≤7.0mΩ (25±2℃ AC 1KHz measured)

Weight:450g

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Product Detail
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Solar battery lifepo4 cell Lithium Ion Battery 3.2v 20Ah

Electrical Characteristics

No Item Specification Test Method/condition
1 Max Charging Voltage 3.6v /
2 Maximum Permissible Charging Voltage 3.8V /
3 Maximum Continuous Charging Current 1.5C 25±5℃
4 Maximum Pulse Charging Current 3.0C SOC≤90%,10℃~35℃,T≤30s
5 Maximum permissible charging temperature 0℃~60℃ /
6 Optimum charging temperature range 10℃~35℃ /
7 Constant current charging capacity ratio ≥96%(0.5C) /

 

Discharge Characteristics

No Item Specification Test Method/condition
1 Discharge Cut-off Voltage 2.5V /
2 Minimum allowable discharge voltage 1.8V Lower limit voltage for low temperature discharge
3 Max.Continuous Discharging Current 1.5C 25±5℃
4 Maximum pulse discharge

current

3.0C Battery surface temperature ≤45 ℃,Discharge duration ≤30s
5 Maximum permissible

discharge temperature range

-20℃~60℃ /
6 Optimum discharge temperature range 10℃~35℃ /
7 Room temperature discharging capacity 20Ah~20Ah*110%,& all the initial capacity range of the test object is not greater than 5% of the average initial capacity value After Standard Charging, rest 5 minutes ,then 1C discharge to ending voltage.
8 Rate discharge capacity ≥95% After Standard Charging, rest 5 minutes ,then 2C discharge to ending voltage(2.5V
9 Discharge capacity at high

temperature

≥98% After Standard Charging, rest 5 h at 55℃,then 1C discharge to ending voltage(2.5V)
10 Discharge capacity at low temperature ≥90% After Standard Charging, rest 24 h at 0℃,then 1C discharge to ending voltage(1.8V)
≥80% After Standard Charging, rest 24 h at -10℃,then 1C discharge to ending voltage(1.8V)
≥70% After Standard Charging, rest 24 h at -20℃,then 1C discharge to ending voltage(1.8V)
11 SOC-OCV SOC/% OCV /V Standard charge at RT (SOC = 100%)Rest time 2 hrs : Recording of the voltage characteristic.Adjustment of SOC: Discharge by 10% (or 10%) SOC with 1 C-rate 4.Repeat step 2-3 until SOC=0% or until to meet limit voltage

 

100 3.4266
90 3.3308
80 3.3305
70 3.3280
60 3.2958
50 3.2902
40 3.2893
30 3.2812
20 3.2437
10 3.2068
o 2.8719

Storage Characteristics

No Item specification Test method/condition
1 Optimum storage temperature range -10℃~30℃ /
2 Storage characteristics at 25℃ Capacity retention: ≥95% 1、Capacity retention test : Capacity after storage for 28 days at 25 ℃ from the standard charge,measured with 1C discharge to ending voltage(2.5V)

Capacity recovery::≥96%

2 、 Capacity recovery test : After Standard Charging, rest 30 Minutes , then 1C discharge to ending voltage(2.5V)
3 Storage characteristics at 45℃ Capacity recovery: ≥95% Capacity recovery test: After storage for 28 days at 50% SOC and 45℃ from the standard charge, then 1C discharge to ending volta ( 2.5V ) . After Standard Charging,rest 30 minutes ,then 1C discharge to ending voltage(2.5V)
4 Storage characteristics at 60℃ Capacity retention: ≥90% 1、Capacity retention test : Capacity after storage for 7 days at 60℃ from the standard charge, measured with 1C discharge to ending voltage(2.5V)
Capacity recovery: ≥92% 2 、 Capacity recovery test : After Standard Charging, rest 30 minutes ,then 1C discharge to ending voltage(2.5V)

battery life

No item specification Test method/condition
1 Standard cycle life ≥1500 times /

Safety Characteristics

No item specification Test method/condition
1 Overcharge test No explosion, no fire Discharge : 1C to 2.5V ; Charge : 1C to 3.96V/115%SOC; When the voltage get to 3.96V or 115%SOC , stop charging;Observation 1h, Stop testing.
2 Overdischarge test No explosion, no fire Charge:1C to3.6V with thecut-off current of 0.05C Discharge:1C for 90min;Observation 1h, Stop testing.
3 Short-circuit test No explosion, no fire After Standard Charging,Shortcircuit the positive and negative for 10 min, and the resistance of copper wire is not more than 5mΩ ,When the temperature falls 10℃ lower than the peak , Observation 1h, Stop testing.
4 Thermal test No explosion, no fire Put cell(100%SOC) into an hot box, test condition: Temperature Rate :5± 2℃ /min Ending temperature :130℃± 2℃Keep temperature for 30 minutes , Then stop heating; Observation 1h, Stop testing.
5 Squeeze test No explosion, no fire After Standard Charging,test condition: Extrusion direction: to put pressure on the cell plates in the vertical direction; Squeeze plate format: 75mm radius half-cylinders,semi-cylindrical length (L) is greater than the size of single cell that is squeezed; Squeeze head speed:≤ 2mm/ s; Squeeze Level: voltage reaches 0V or deformation reaches 15% or squeezing pressure reaches 100kN or squeezing pressure reaches 1000 times of cell; Keep for 10 minutes.Observation 1h, Stop testing.
6 Drop test No explosion, no fire,no leakage After Standard Charging,positive and negative poles fall freely down to the cement floor from the height of 1.5m.Observation 1h, Stop testing.
7 Low pressure test No explosion, no fire,no leakage After Standard Charging;put cell into a low pressure box, adjust the pressure to 11.6kPa,rest 6 hours; Observation 1h, Stop testing.
8 Temperature cycle test No explosion, no fire After Standard Charging,put cell into the temperature test chamber,test condition as follows:Observation 1h, Stop testing.
9 Seawater immersion test After Standard Charging,put cell into3.5% NaCl solution for 2h, completely immersion;

Storage and Shipment Requirement

Item Requirement
Storage environment Short period less than 1 month -20°C ~ +45°C, 85%RH Max
Long period more than 3 month -10°C ~ + 45°C, 85%RH Max Storage Voltage:3.2V-3.3V
Recommend storage 15°C -35°C,85%RH Max, Storage Voltage: 3.2V-3.3V

Q :Do you provide free sample ?
A: Yes, a few pcs free sample can be provided, but freight will be charged

 

Q:do you accepte OEM order ?
A: Yes,you can print yourself logo, also we can provide the design of outlook for your special battery pack

 

Q :How many cells you can produce per month?
A: 1.8million

 

Q :What is the mode of transport?
A: usually by sea

 

Q:Which certificates do you have
A:We have un38.3,MSDS…etc.

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  • Lilian 10:12 AM, Today
    Dear Sir /Madam, nice to see you ,pls let me know do you need cell or pack (pls clarify LFP or LTO )