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3.2V 50Ah Rechargeable LiFePO4 Battery 2 Years Warranty Low Self - Discharge

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Buy cheap 3.2V 50Ah Rechargeable LiFePO4 Battery 2 Years Warranty Low Self - Discharge from wholesalers

3.2V 50Ah Rechargeable LiFePO4 Battery 2 Years Warranty Low Self - Discharge

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Brand Name:Topband

Model Number:TB-A32173128E-Fe-50Ah

Certification:CE,UL,UN38.3,MSDS

Price:Negotiable

Payment Terms:T/T, L/C

Supply Ability:450Mwh/year

Delivery Time:2~4weeks for samples; 4~6weeks for mass production

Company Data

Shenzhen Topband Battery Co., Ltd

Active Member

Contact Person Jerry Yang

Business Type: 86-755-27651888-3215

Business Type: Manufacturer Exporter

Officials: Topband Industry Park,Tangtou Town,Bao'an District,Sheznzhen,China

Quality: Quality Certifitation Available

Product Details Company Profile

Product Details

3.2V 50Ah Rechargeable LiFePO4 Battery 2 Years Warranty and Low Self - Discharge

1. General

This product specification describes the technique standards, test methods and precaution notes of prismatic type Lithium iron phosphate rechargeable cell, manufactured by Shenzhen TOPBAND Battery CO.,LTD.

2. Product specification

No.	item	standard	remark
2.1	Nominal Capacity	50Ah	25±5℃,0.5C discharge
2.2	Internal Impedance	≤4mΩ
2.3	Nominal Voltage	3.2V
2.4	Weight	1350±50g
2.5	Max charge Voltage	3.65V	At CC mode
2.6	End-of-charge Current	0.05C	At CV mode
2.7	Cut-off discharge Voltage	2.00V
2.8	Standard Charge Method	0.5C CC/CV	25±5℃
2.9	Max continuous discharge current	2C	Recommend 1C
2.10	Max pulse Discharge Current	5C	Discharge Time: 10 seconds
2.11	Cycle Life	2000cycles @100% DOD	At room temperature 25℃; 1C Continuous Discharge and 1C continuous charge current; ≥80% SOC (100% DOD) 25±5℃
2.12	Calendar Life	8years
2.13	Charging Temperature	0～45℃
2.14	Discharging Temperature	-20～55℃
2.15	Storage Temperature	-10～30℃
2.16	Terminal torsion	≤5.5N·m	Locknut is recommended
2.17	Appearance	Without break, scratch, distortion, contamination, leakage and so on

3. Test Conditions

3.1 Standard Test Conditions

3.1 All tests stated in this Product Specification are conducted at temperature 25℃±5℃ and humidity 15℅～90% RH, atmospheric pressure 86kPa～106kPa.

3.2 Standard Charge Method

The "Standard Charge" means in an ambient temperature of 25℃±5℃, the cell was discharged with 0.5C constant discharge current to cut-off voltage 2.0 V, standing 1h, then charged it with 0.5C constant current to 3.65V, then charge mode turn into CV mode, until the charging current is down to 0.05C, then end of charging and standing 1h.

4. Electrical Characteristics

item	Test method	Criteria
4.1 High Temperature Discharge Performance	The cell was charged in accordance with 3.2, and stored in an ambient temperature of 55℃±3℃ for 5h, then discharged to cut-off voltage with a constant current of 1C. After that, fetch out the cell and place it in the ambient temperature of 25℃±5℃ for 4h then check its appearance.	Capacity retention at 55℃ :≥95%
4.2 Low Temperature Discharge Performance	The cell was charged in accordance with 3.2,and stored in an ambient temperature of -20℃±3℃ for 24 hours, then discharged to cut-off voltage 1.8 V at a constant current of 1C. After that, fetch out the cell and place it in the ambient temperature of 25℃±5℃ for 4hours, then check its appearance.	Capacity retention at -20℃ :≥70%
4.3 Rate Charge Performance in Normal Temperature	Under the ambient temperature of 25℃±5℃ a. Discharged the cell with 1C constant current until the cut off voltage to 2.0V, stay for 1h. b. Charged the cells with 2C constant current until the voltage to 3.65V, stay for 1h. c. Discharged the cells with constant current until the cut off voltage 2.0V.	2C charge capacity≥80%
4.4 Rate Discharge Performance in Normal Temperature	The cell was charged in accordance with 3.2, then discharge to cut-off voltage 2.0V with 3C current in an ambient temperature of 25℃±5℃.	3C discharge capacity≥95%
4.5 Cycle Life (25℃±5℃)	The cell was fully charged to 3.65V with 1C (cc/cv), after that stayed for 30min; Subsequently, the cell was discharged to cut-off voltage 2.0V with constant current 1C, and stayed 30 minutes; prior to next charge-discharge cycle. Record all the cycles until the retention capacity＜80%.	≥2000cycles

5. The performance test curve (for reference):

6. Environmental Characteristics

No .	Item	Test Method	Criteria
6.1	Temperature shock test	A cell is charged in accordance with 3.2, and then repeat the following procedures for 5 cycles, then check the cell's appearance.	No leakage, no fire, no explosion, no vent
6.2	Low-pressure Test	The cell is charged in accordance with 3.2, then stored for 6h at a vacuum of -90KPa, after that put the cell in room temperature for 6h, then check the cell's appearance.	No leakage, no fire, no explosion, no vent
6.3	Vibration Test	The cell is charged in accordance with 3.2, and then installed onto the vibration machine. Equipment parameters of frequency and amplitude are set as bellow (the frequency is to be varied at the rate of 1oct/min between 10 and 55 Hz, and repeat vibration for 30 min. The cell is tested in three mutually perpendicular directions, i.e. X,Y,Z): frequency:10Hz~30Hz, amplitude: 0.38mm; frequency:30Hz~55Hz amplitude: 0.19mm	No scratch, no fire, no explosion, no vent; The voltage is not less than 3.2V.
6.4	Shock Test	The cell is tested in accordance with 3.2, and then secured to the testing machine by means of rigid mount which supports all mounting surfaces of the cell. Each cell shall be subjected to a total of three shocks of equal magnitude. The shocks are to be applied in each of three mutually perpendicular directions. The acceleration and impulse time are as follows: acceleration of impulse peak value: 100m/s2, shock frequency:40~80 times/min, impulse lasting time:16 min, shock times:1000±10	No scratch, no leakage, no fire, no explosion, no vent; the voltage is not less than 3.2V.

7. Safety test

All below tests are carried out on the equipment with forced ventilation and explosion-proof device. Before test, all cells are charged in accordance with 3.2, and stored 24h prior to test.

No.	Item	Test Method	Criteria
7.1	Short- circuit Test	The cell was charged accordance with 3.2, after that 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 for 1h.	No fire, no explosion
7.2	Overcharge Test	The cell was tested in accordance with 3.2, then 1C constant current charged till the voltage reaches 1.5 times of the specified end-off charge voltage, or the charge time reaches 1h, then stop charge, and observe for 1h.	No fire, no explosion
7.3	Over discharge test	The cell was tested in accordance with 3.2, then 1C discharge for 90min, then observe for 1h.	No fire, no explosion, no leakage
7.4	Crush Test	The cell was tested in accordance with 3.2, and then is placed on the crush machine, the axis is parallel to the crush equiment, and it is crushed between two flat surfaces till the crushing force is gradually approaching 200 kN, or voltage reaches 0V,or reaches 30% distortion, then observe for 1h.	No fire, no explosion
7.5	Impact Test	The cell was tested in accordance with 3.2, and then placed on the impact flat. A Φ15.8mm bar is to be placed on the center of the cell. A 9.1kg weight is dropped from a height of 610mm onto the cell, the distortion is allowed.	No fire, no explosion
7.6	Stick Test	The cell was tested in accordance with 3.2 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;	No fire, no explosion
7.7	Heating Test(130℃)	The cell was tested in accordance with 3.2, and then heated in a circulating air oven. The temperature of the oven is raised at a rate of 5℃ per minute to 130℃±3℃ and remain for 30 min.	No fire, no explosion

8,Dimension (Unit:mm)

Company Profile

Shenzhen Topband Battery Co., Ltd

Shenzhen Topband Co., Ltd. was registered in so-called “China Silicon Valley”, Shenzhen Hi-tech Industrial Park in 1996, and got listed in Shenzhen Stock Exchange ( the stock code as 002139) in 2007.

After years of rapid development, now Topband takes lithium battery as the core technology and has become one of the leading suppliers of lithium battery solutions in China, focusing on nano lithium iron phosphate/ LiFePO4 technology for EV, RV/ caravan, marine, motorcycle, golf cart / trolly, UPS, solar storage, medical, floor scrubber, industrial, commercial use, etc.

Smart Bluetooth & WIFI connection is is our patent feature, equipped with IOS & Android app to monitor the instant battery status (SOC, OCV, charge current, ambient temperature, and errors included).

Topband has more than 5000 staffs, covers an area of 100,000 square meters. And large production plants are mainly located at Shenzhen and Huizhou

Our R&D team of over 300 professionals, in cooperation with Tsinghua Research Institute and Harbin Industrial University have laid a firm foundation of our leading technology.

We have got the certificates of ISO9001, ISO14001, OHSAS18001, TS16949 and UL, CE, CB, UN38.3, TUV, etc.

Topband is a Hi-tech enterprise. Since the company established, with innovation, we have committed ourselves to making people’s lives more comfortable and high-efficient. We and our companions are working hard at making technology progress to let people enjoy the changes of new technology.