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INTRODUCTION Products of SUM Customized lithium iron phosphate battery solutions Lithium iron phosphate battery is a li-ion battery using LiFePO4 as cathode material。 Main models of Lithium iron phosphate:26650/32650/ 18650。 Characteristics of lithium iron phosphate battery:High Safety(The...

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INTRODUCTION

Products of SUM

Customized lithium iron phosphate battery solutions

Lithium iron phosphate battery is a li-ion battery using LiFePO4 as cathode material。

Main models of Lithium iron phosphate:26650/32650/ 18650。

Characteristics of lithium iron phosphate battery:High Safety(The safety factor is higher than that of conventional lithium ion battery and polymer lithium battery)、Long battery life(The life cycle is above 2000 times)、Wide temperature range(The working temperature range is -20, ~+75, environmental protection, no memory effect, etc.)。

Application: lithium iron phosphate batteries are widely used in large-scale electric vehicles, electric bicycles, golf carts, forklifts, cleaning cars, electric wheelchair, electric tools, solar and wind power energy storage equipment, emergency lights, portable power storage, warning lights and lamps.

I/ Products specs

Model

18650-2S2P

Dimensions

36*36*65mm

Capacity

5000mAh

Voltage

7.4V

Environment of usage

-40~80℃

Certifications

CE、ROHS、UL、FCC、KC、IEC62133、CQC、UN38.3、MSDS

II/ Production process

III/ safety performance testing

1. High-low temperature pressure:

Change the temperature between 80±5℃ and 0℃, and simulate pressure of 5 ~ 7T while the battery is molded under extreme temperature and pressure conditions.

2. Temperature cycle:

The battery should be placed separately at least 6h at the temperature of (75±2)℃ and (-40±2)℃ with a 30min free temperature adjustement.  Put the testing battery in (20±5)℃ after thermal shock ten times and evaluate the sealing integrity and internal electric connection under a rapidly changing temperature condition. 

3. Extrusion:

A round bar weighting around 9.1kgs with a diameter of 15.8 mm is placed to fall on the battery surface from 61±2.5cm of height. An evaluation is done to assess situations that may cause internal short circuits, such as possible impacts or crushing during shipping.

4. Needle test:

Using a press machine with a steel needle of 3-3.5mm diameter, the battery is punched at 10-40mm/s speed and there should be no smoke, no fire, and no explosion after pulling it out. This test helps evaluate an

internal short circuit condition in the battery 

5. Vibration test:

The battery is fixed on a vibrating table, within 15min from 7Hz ~ 200Hz ~ 7Hz to complete a logarithmic frequency sweep sinusoidal vibration, 3h within three-dimensional direction to complete 12 vibrations, no leakage, no exhaust, no disintegration, no rupture, no fire should be observed. The vibration simulation is to evaluate the risks during transportion.

6. Drop test:

The battery is dropped from a falling height of 1.5m free fall on the concrete, the battery should not catch fire, nor be short circuited & no leakage should be observed;

Usage of extreme safety is required while testing all batteries.

Packaging: Only the qualified batteries will be packaged for delivery.

FAQ

1-Q/ Do Li-ion batteries develop a memory? Do I need to recharge after every use?

A/ No, While older styles of battery did develop a “memory”, the new Li-ion batteries do not.

2-Q/ What’s the normal temperature range for the usage of Lithium polymer battery?

A/ batteries can work in a normal temperature range of -20°C to 60°C,

3-Q/ What’s the high temperature range for the usage of Lithium polymer battery?

A/ High-temperature batteries can work between -10°C to 80°C

4-Q/ What’s the low temperature range for the usage of Lithium polymer battery?

A/Low-temperature batteries can work between -40°C to 50°C.

5-Q/ What is the difference between lithium and lithium ion batteries?  

A/The biggest differences are that lithium batteries contain lithium metal and are not rechargeable. Lithium ion batteries, however, do not contain lithium metal and can be recharged.


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