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0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery

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0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery

0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery
0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery 0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery

Large Image :  0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery

Product Details:

Place of Origin: China
Brand Name: Topband
Certification: ISO9001/ISO14001
Model Number: TB-Cell-E001N-80120210-20.0Ah-LFP

Payment & Shipping Terms:

Minimum Order Quantity: 1000pcs
Price: Negotiable
Packaging Details: standard export carton
Delivery Time: 30 days
Payment Terms: Western Union, L/C, D/A
Detailed Product Description
Voltage: 3.2V Capacity: 20Ah
Chemistry: LiFePO4 Fast Charge Current: 20A (1C)
Max. Discharge Current: 60A (3C) Internal Impedance: ≤2.5mΩ
Operating Temperature: -20~60℃ Life Cycle: 1C, 100%DOD,≥2000 Times
High Light:

0.5C Discharge Rechargeable Lifepo4 Battery

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50%SOC Rechargeable Lifepo4 Battery

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20Ah Lifepo4 Rechargeable Cell

High performance pouch cells 3.2V 20Ah LiFePO4 Battery

 

This specification describes the technique standards, test methods and precaution notes of laminate type( Lithium ion) LiFePO4 rechargeable cell, manufactured by SHENZHEN TOPBAND BATTERY CO.,LTD.

 

1. Specification

No Item Specification Remark
1.1 Nominal capacity 20Ah

25±2℃

0.5C Discharge capacity

1.2 Min capacity 20Ah
1.3 Nominal voltage 3.2V  
1.4 Charge cut-off voltage 3.65V  
1.5 Charge current Standard charge:0.5C (10A)  
Fast charge:1.0C (20A)  
1.6 Charge time Standard charge:3 hours (Ref.)  
Fast charge:1.5 hours (Ref.)  
1.7 Max charge current 1.5C (30A)  
1.8 Continuous discharge current 1C (20A)  
1.9 Max discharge current 3C (60A) 50%SOC,≤120S
1.10 Discharge cut-off voltage 2.4V  
1.11 Internal impedance ≤2.5mΩ  
1.12 Weight About 420g  
1.13 Dimension Thickness:80mm Max  
Width:121mm Max
Length:212mm Max
1.14 Operating temperature

Charging temperature:5~45℃

Discharging temperature:-20~60℃

1.15 Storage temperature -10~30℃
1.16 Appearance No break,scratch,distortion,contamination,leakage.
 
 
2. Electrical Charateristic
    

2.1 Standard testing conditions

       2.1.1 All performance tests is required to be conducted at temperature:25℃±5℃,Humidity: 15%~90% RH,Atmospheric pressure: 86 kPa~106 kPa.

            2.1.2 Unless other special instructions, the tested product is required unused within one month after outgoing.

2.2 Standard charge mode

The “Standard charge” means at an ambient temperature of 25±5℃, the cell was discharged with 0.5C constant current to cut-off voltage 2.4V,standing 1 hour. Then charged it with 0.5C constant current to 3.65V, then change into constant charge mode, Until the charge current down to 0.05C, then stop charging and store it for 1h.
 
No Item Criteria Testing method
2.1 2C discharge performance Retention capacity≥90%

Charge the cell at method 2.2 at Normal temperature; discharge it at 1C to cut-off voltage(Initial temperature

);And then charge it at method 2.2 , discharge it at 2C to the cut-off voltage again.

2.2

0.5C Continuous discharge capacity at low temperature

(-10℃)

Retention capacity ≥60% Charge it at method 2.2, freeze the battery module for 16h at -10℃, then discharged it at required current =0.5C;until the voltage 1.8V
2.3 Discharge capacity at high temperature Retention capacity ≥95% Charge the cell at method 2.2;Discharge at 1C to the cut-off voltage;Charge the cell at method 4.2;store the cell at 55℃±2℃ for 5h,then discharge at 1C to the cut-off voltage at 55℃±2℃.
2.4

 

 

 

 

 

 

Cycle life at normal temperature

 

 

1C, 100%DOD,≥2000 times

Charge the cell at 1C constant current and constant voltage at 25℃±5℃ to voltage 3.65V,current ≤0.05C, store it for 30min,then discharge it at constant current at 1.0C to the cut-off voltage 2.4V. Do the test until the capacity≤80% for 3 times. Cycle life≥2000times.

 

0.5C, 100%DOD,

≥3000 times

Charge the cell at 0.5C constant current and constant voltage at 25℃±5℃ to voltage 3.65V,current ≤0.05C, store it for 30min,then discharge it at constant current at 0.5C to the cut-off voltage 2.4V. Do the test until the capacity≤80% for 3 times. Cycle life≥3000times.

 

 

0.5C, 80%DOD,≥5000 times

Charge the cell at 0.5C constant current and constant voltage at 25℃±5℃ to voltage 3.55V,current ≤0.05C, store it for 30min,then discharge it at constant current at 0.5C to the cut-off voltage 3.0V. Do the test until the capacity≤80% for 3 times. Cycle life≥5000times.
2.5

 

 

SOC at normal temperature

Residual capacity ≥85% of initial capacity;remain capacity≥ 90% of initial capacity Charge the cell at method 2.2;discharge it at 1C to the cut-off voltage(Initial capacity);Charge the cell at method 2.2;store it at 25℃±2℃ for 28 days;then discharge it at 1C to the cut-off voltage(Residual capacity); Charge the cell at method 2.2, discharge it at 1C to the cut-off voltage (Remain voltage).
2.6

 

 

SOC at high temperature

Residual capacity ≥85% of initial capacity;remain capacity≥ 90% of initial capacity Charge the cell at method 2.2;discharge it at 1C to the cut-off voltage(Initial capacity);Charge the cell at method 2.2;store it at 55℃±2℃ for 7 days;then discharge it at 1C to the cut-off voltage(Residual capacity); Charge the cell at method 2.2, discharge it at 1C to the cut-off voltage (Remain voltage).
 
3. Safety Test

All tests below are carried out on the equipment with forced ventilation and explosion-proof device. Before test, all cells are charged in accordance with 4.2, and stored 24h prior to test.

No Item Criteria Testing method
3.1 Short-circuit Test No fire, no explosion

The cell was charged in accordance with 4.2.

Then the cell is short-circuited by connecting the positive and negative terminals with a wire for 10min, the wire has a maximum resistance load of 5mΩ, then observe it for 1h.

3.2 Over charge Test No fire, no explosion The cell was charged in accordance with 4.2, charged at 1C constant current till the voltage reaches the 1.5 times of the specified end-off charge voltage, or the charge time reaches 1h, then stop charge, and observe for 1h.
3.3 Over discharge Test No fire, no explosion, no leakage The cell was charged in accordance with 4.2, discharge at 1C for 90min. Then observe it for 1h.
3.4 Crush Test No fire, no explosion

The cell was charged in accordance with 4.2, and

then is placed on the crush machine, the axis is parallel to the crush equipment, and it is crushed between two flat surfaces till the crushing force is gradually approaching 200 kN, or the voltage reaches 0V,or reaches 30% distortion, then observe it for 1h.

3.5 Impact Test No fire, no explosion, no leakage The cell was charged in accordance with 4.2, and stored for 30 min.
The positive and negative poles of the battery are freely dropped onto the concrete floor from a height of 1.5 m; observe it for 1h.
3.6 Nail Test No fire, no explosion
  1. The cell was charged in accordance with 4.2
  2. use φ5mm~φ8mm high temperature

resistance steel needle, with speed of 25±5mm/s, to go through the cell from vertical direction of pole plate, the penetrate position should be close to the geometric center of plate surface, the steel needle remains in the cell;

  1. Observe it for 1h.
3.7

Heating Test

(130℃)

No fire, no explosion

The cell was charged in accordance with 4.2, and

Put it in a heated circulating air oven. The temperature of the oven is raised at a rate of 5℃ per minute to 130±2℃ and remain for 30 min.

3.8 Seawater immersion No fire, no explosion

The cell was charged in accordance with 4.2;

Immerse the cell in a 3.5% NaCl solution (mass fraction

simulate the seawater composition at room temperature )for 2h, the water depth should pass the cell completely; observe it for 1h

3.9

 

 

 

Vibration Test

 

 

No fire, no leakage, residual capacity≥95%, Voltage change ≤0.5%, Internal impedance increase ≤20%

The cell was charged in accordance with 4.2, fastened to the vibration test bench and subjected to vibration test under the following conditions:

- The vibration frequency varies at a rate of 1 Hz/min in the range of 10-55 Hz, 90 ±5 minutes in one round trip with an amplitude of 0.8 mm (the entire maximum stroke is 1.52 mm).
- Vibration needs to be applied to three mutually perpendicular directions, vibrating 90±5 minutes in each direction. Observe it for 1h

 

4. Dimension

 

    0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery 0

 

Item Specification Dimension
T Thickness of cell ≦8.0mm
W Width of cell ≦121mm
H Height of cell ≦212mm
H1 Length of tab 20±2.0mm
W1 Width of tab 30±0.1mm
W2 Distance of tabs 74±2.0mm
Tab dimension Exposed length of tab gum 0.2~2.0mm
Thickness of positive tab 0.20±0.01mm
Thickness of negative tab 0.20±0.01mm

 

 

4. Product picture

 

     0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery 1

     0.5C Discharge 3.2V 20Ah 50%SOC Rechargeable Lifepo4 Battery 2

 

Contact Details
Shenzhen Topband Battery Co., Ltd

Contact Person: Jerry Yang

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