Customized li-ion cells rechargeable 3.2V 6.4v 9.6v lithium battery pack for solar energy system

Product Description

You can find more information on our web, so please take a look.

 

Certifications

 

Product Parameters

Item

Specification

Remarks

Typical Capacity

mAh

0.5C5A discharge

Minimum Capacity

mAh

0.5C5A discharge

Nominal Voltage

3.2V

 

Discharging Voltage (Min)

2.0V

 

Charging Voltage (Max)

3.65±0.05V

 

Charging Current(Std)

mA

0.2C5A(0 ~ +45°C)

Discharging Current(Std)

mA

0.2C5A(-20 ~ +60°C)

Max Charging Current

mA

1.0C5A(0 ~ +45°C)

Discharging Current(Max/Peak 3s)

mA

5.0C5A(-20 ~ +60°C)

Max continuous Discharging Current

mA

3.0C5A(5 ~ +45°C)

Internal Impedance

&#;3.0mW

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AC Impedance 1kHz

Cell Weight

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300g

About

Storage temperature range

< 1 Month

-20 ~ +60°C

 

 

< 3 Month

-20 ~ +45°C

 

 

<12 Month

-20 ~ +25°C

 

Charging temperature range

 

0 ~ +45°C

 

Full Charge

The charger supplies 0.2C5A constant current until battery voltage reaches 3.65V,then be changed at constant voltage of 3.65V
while tapering the charge current to less than or equal to 0.01C5A.Charging time is 5.0 hours in all.

 

Capacity

Within 1 hour after fully charged, discharged at 0.5C5A continuously down to 2.0V.

³ 100% capacity

 

Within 1 hour after fully charged, discharge at 1.0C5A continuously down to 2.0V.

³ 95% capacity

Cycle life

A battery unit shall be repeated charge/discharge cycles, charged at CC-CV(0.2C5A-3.65V) for 5 hours, discharged at 0.5C5A
continuously down to 2.0V Cut-off Voltage, Measure discharge capacity.

³ 80% capacity

Capacity retention

After fully charged, stored for 28 days at 20°C, then for 1 hour at normal temperature and continuously discharge at 0.2C5A to
2.0V.

Capacity retention rate ³ 95%

Application

 

 

Company Profile

Everbest is a company specializing in R&D and production of lithium batteries, including its own cell factory, battery assembly factory and BMS center. The quality is stable, the price is very cost-effective, and it has been widely praised in the market. Products are widely used in solar street lights, base stations, household and commercial solar systems, electric vehicles and other electric transport vehicles. We can also provide customize services and have many successful cases.

 

Currently our best-selling lithium cell are -mah, -mah, mah and high rate 8C-15C and for electric tools.
Hot-sell lithium batteries pack are12V, 24V 50-400AH which can directly replace lead-acid batteries, and rack-mounted batteries 48V 100AH.

We have strong technical force and advanced equipment. Our factories passed ISO quality system certification, ISO environmental system certification and ISO health system certification; our products have passed the BIS, EU CE , ROHS, IEC certification, and form long-term strategic partnerships with power companies, photovoltaic energy storage companies, State Grid, China Southern Power Grid, products are exported to 50 countries and regions in the Americas, Europe, Oceania, the Middle East, Africa, Southeast Asia,  gained a great reputation at home and abroad.

Q1: Are you a manufacturing factory?
A1: Yes, We are a lithium battery manufacturer from China. Welcome to visit our factory and production process.If the quantity is suitable, we accept OEM/ODM.

Q2: What's your product range?
A2: We focus on Lithium-ion/LiFePO4 battery for residential and commercial energy storage system, portable power station,UPS etc.

Q3: What is the production time for your lithium battery?
A3: The sample delivery time is about 10-15 working days. The bulk order delivery time is about 15-20 working days according to quantity.

Q4: Can I buy one or two units for the sample first?
A4: Yes. Support sample service.Please contact us to place the order.

Q5: Is it OK to print my logo on the product?
A5: Yes.We support custom logo/size/color/etc, Free deign provided.

Q6: Why choose us?
A6: Reliable-- Our certifications like ISO , TUV is our commitment to quality and safety for our lithium batteries.
Advantage-- We provide Custom service: BMS function, high voltage or high current system, supporting free system solutions.
Professional--Factory is Professional manufactures Lithium Batteries(battery cell,battery pack, battery cabinet ) in China,GuangDong, Professional Experience with many famous companies cooperated.

I did a capacity test on two cells of 3.65V down to 2.5V at 7A (approx .5C) and one came at at 13.4AH and the other 13.5AH. The battery got warmer than ambient but not by much, I could barely detect a difference by feel.

The copper tabs are the best feature, I found I could solder them with my Weller D550 260W soldering gun with no problem - sand the tabs to bright copper, add a little dab of flux and a drop of solder held on the gun for 30 seconds and then touched to the tabs and it adhered and spread out immediately. I was then able to tin and solder a 12 gauge wire onto the cell. My 100W soldering gun was NOT enough to solder these with.

At $8 bucks they're still a hell of a buy, but just know you're not really buying 15AH cells and they've got a 14% failure rate right out of the box.

Presented below beside a Headway 8AH as a comparison. Positive and Negative aren't marked so I put a black line around one end for the negative.

Received 36 cells and 5 cells were either bad or marginal: 3 were completely bad with .021V 1.8V and 2.1V, the marginals had 2.77 and 2.8V - since all the others were 3.0-3.11v (almost all 3.05-3.08V with a few outliers) the marginals had obviously self-discharged and are not something I want to use. A 14% failure rate. The copper tabs were oxidized so these werent new cells right off the assembly line.I did a capacity test on two cells of 3.65V down to 2.5V at 7A (approx .5C) and one came at at 13.4AH and the other 13.5AH. The battery got warmer than ambient but not by much, I could barely detect a difference by feel.The copper tabs are the best feature, I found I could solder them with my Weller D550 260W soldering gun with no problem - sand the tabs to bright copper, add a little dab of flux and a drop of solder held on the gun for 30 seconds and then touched to the tabs and it adhered and spread out immediately. I was then able to tin and solder a 12 gauge wire onto the cell. My 100W soldering gun was NOT enough to solder these with.At $8 bucks they're still a hell of a buy, but just know you're not really buying 15AH cells and they've got a 14% failure rate right out of the box.Presented below beside a Headway 8AH as a comparison. Positive and Negative aren't marked so I put a black line around one end for the negative.

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