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Li-ion and LiFePO4 Cells

Li-ion batteries have multiple chemistries such as Nickel Manganese Cobalt (NCM), Lithium Cobalt Oxide (LiCoO2), and Lithium Ion Manganese Oxide (LiMnO2). Mostly these batteries are available in standard size which is 18650. These batteries are commonly used in laptops, power tools, robots and specially in electric vehicles. With the use of different advanced technologies these batteries are becoming safer. The nominal Voltage of these battery cells are 3.6, 3.7, and sometimes 3.65 volts.
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Melasta Li-ion Cells

 

 

 Cell Features

Research and Development department has enabled Melasta to produce high quality. Light weight and more power cells in cylindrical shape. We have developed different sizes in cylindrical shape according to the customer demand. 

Different Available Chemistries

Melasta uses different chemistries according to the customer demand for Lithium Ion Cells production. We always strive for the best quality by using the international quality standards.

LiCoO2 - Lithium Cobalt Oxide

This chemistry is popular choice for laptops, mobile phones, and digital camera and e-bikes due its high specific energy property. This battery made of graphite carbon as anode and cobalt oxide as cathode.  Cobalt is the active material which gives properties to the battery.

LiMnO2 - Lithium Ion Manganese Oxide

LiMnO2 battery is known for the characteristics such as fast charging and high current discharging with moderate heat buildup. These batteries can be discharge at 20-30A with very normal thermal buildup. it may discharge at 50A pulse load but it depends on the other specifications as well.  These batteries are the best choice for power tools, medical equipments, RC toys, Hybrid cars, and electric vehicles.  

NCM - Nickel Manganese Cobalt

This Chemistry is the combination of nickel-manganese-cobalt. These batteries can be customized either as power cells or as energy cells. NMC is the popular choice for power tools, e-bikes, and other electric power trains. Because of the combination of blended li-ion and NMC can reduce the cost and make the battery cost effective with very good performance.

  High energy density
High working voltage
Environment Friendly
Long cycle life
No memory effect
Low self-discharge rate
Light weight,
Small Size
Safe and stable performance

 

 

Cell Dimensions

Technical Specification

Specification of Battery Cell MB18650 (3.7V, 2600mAh)

1. Electrical Characteristics

 

    Graph #1 Life Cycles

 

Nominal Voltage

3.7V

Nominal Capacity

2600mAh

Energy

9.62Wh

Internal Resistance

≤60mΩ

Cycle Life

500 cycles @0.2C80%DOD

Months Self Discharge

3%

Efficiency of Charge

100%@0.5C

Efficiency of Discharge

96~99%@1C

 

 

 

 

 

 

 

 

 

 

 

2. Standard Charge

 

    Graph # 2 Different Rate Charge Curve

 

Charge Voltage

4.2V

Charge Mode

4.2V, then 4.2V,charge current to 0.02C5A(CC/CV)

Charger Current

520mA

Max. Charge Current

1.0C5A

Charge Cut-off Voltage

4.2±0.03V

 

 

3. Standard Discharge

 

    Graph # 3 Different Rate Discharge Curve

 

Continuous Current

520mA

Max. Discharge Current

1.5C 5A

Discharge Cut-off Voltage

3.0V

 

5. Mechanical

 

Dimensions(mm.)

18.5*65.5mm MAX

Weight (g.)

Approx:45g

 

 

4. Environmental

 

    Graph # 4Different Temperature Discharge Curve

Charge Temperature

0℃to45℃(32Fto113F)@ 60±25%RelativeHumidity

Discharge Temperature

-20to60(-4Fto140F)@ 60±25%RelativeHumidity

Storage Temperature

0to40(32Fto104F)@ 60±25%RelativeHumidity

Water Dust Resistance

/

 

 

Few Models Description

 

Regular Type Cylindrical Li-Ion Battery Cells

 

Item No.

Battery Model

Nominal Voltage

Nominal Capacity

Dimension

Standard Charge Current

Quick Charge Current

Max Continuous Current

Approx. Weight

Diameter

Height

(V)

(mAh)

(mm)

(mm)

(mA)

(mA)

(A)

(g)

1

ICR 18650

3.7

1600

18.3

65

320

1600

1.6

33

2

ICR 18650

3.7

1800

18.3

65

360

1800

1.8

39.5

3

ICR 18650

3.7

2000

18.3

65

400

2000

2

44.5

4

ICR 18650

3.7

2200

18.3

65

440

2200

2.2

46

5

ICR 18500

3.7

1300

18.1

48.8

260

1300

1.3

32

6

ICR 18500

3.7

1400

18.1

48.8

280

1400

1.4

33

7

ICR 18500

3.7

1600

18.1

48.8

320

1600

1.6

35

8

ICR 16340

3.7

600

16.6

35

120

600

0.6

18

9

ICR 16340

3.7

700

16.6

35

140

700

0.7

20

10

ICR 14430

3.7

600

14.3

42.8

120

600

0.6

16.5

11

ICR 14430

3.7

650

14.3

42.8

130

650

0.65

17

12

ICR 14500

3.7

700

14.3

48.8

140

700

0.7

18.5

13

ICR 14500

3.7

750

14.3

48.8

150

750

0.75

17

14

ICR 14650

3.7

1000

14.3

65.3

200

1000

1

18.5

 
 
 
 

 

Lithium Iron Phosphate (LFP or LiFePO4) Cells 

 

What is LiFePO4 Chemistry?

LiFePO4 is the formula name of Lithium Iron Phosphate, also known as LFP. It replaced other battery technologies because of its technological advancement and safety features. This latest technology is being used in a number of application from small devices consumer devices to heavy duty industrial machines.  These cells have high density and light weight which enable this technology to use in multiple devices.

Why LiFePO4?

These batteries are specially used for Energy storage solution(ESS) and heavy machinery because of their deep cycling features.  Melasta helps to install the Energy storage solutions for renewable energy and also to design and manufacture the other kind of portable energy solutions. 

Cells Type

 

Cylindrical Cells

 

Cylindrical cells one of the most widely used lithium ion battery shapes due to ease to use and good mechanical stability.The tubular cylindrical shape can withstand high internal pressures without collapsing. Melasta produces multiple sizes and capacities according to the customer requirement. These cells are mostly used in Electrical vehicles such as golf cart and in power tools.

 

Prismatic Cells

 

These cells are used for more energy storage. These batteries are mechanically very stable due their structures. These batteries are mainly used for energy storage for industry and home usage, ups application, telecommunication, golf carts, electric trucks, and electric buses. The storage capacity of these cells are from 20Ah to 120Ah. 

 
 

 

Salient Features of Melasta LiFePO4 batteries

 

Melasta is one of the main producer and supplier for LiFePO4 batteries in China. Our batteries have the features due to our superior technologies and state of the art manufacturing facilities. 

 

   Very long cycle life 

Melasta batteries provides 2500 life cycles with 80% DOD at 25oC temperature. Life cycles may vary with temperature change. 

 

 

Light Weight 

 

These batteries are very light weight as compared to the Lead-acid batteries and all other old technologies. Due to this property these batteries are popular batteries in e-mobility industry to outperform the old technologies such as lead-acid batteries. 

 

Non-Hazardous

These batteries do not contain any hazardous material so these are fully environment friendly and recyclable batteries.

 

 

Wide Temperature range -10C- to 60C

Operational temperature range is very wide it operates on extreme temperatures. The normal operational temperature range is from -10oC to +60oC. These batteries are also used as starter batteries in extremely cold temperatures.

 

 

     Easy to Recycle
These batteries are easy to recycle without any hazardous waste and dangerous emissions in the environment.   

 

 

     Very Low Internal Resistance
These batteries have very low internal resistance which is very favorable for its safety. 

 

 

Maintenance Free

Normally old technology batteries such as lead-acid batteries required regular maintenance which increase the over cost of the battery system. When you replace lead-acid batteries with LiFePO4, then you do not need to worry about regular maintenance of the battery because these batteries do not require any kind of maintenance. 

 

 

 

 

Melasta LiFePO4 Cell Specification (IFR2665E-3800mAh)

Technical Specification

 
1. Electrical Characteristics     Graph # 1 Cycle Life Curve

Nominal Voltage

3.2V

Nominal Capacity

3800mAh

Energy

12.16Wh

Internal Resistance

 ≤60mΩ

Cycle Life

2000 cycles @0.2C 80%DOD

Months Self Discharge

 <3%

Efficiency of Charge

100% @0.5C

Efficiency of Discharge

96~99% @1C

 

 

 

2.Standard Charge

    Graph # 2. Discharge Curve

Charge Voltage

3.65V

Charge Mode

0.2C to 3.65V, then 3.65V,charge current to 0.02C5A (CC/CV)

Charger Current

760mA

Max. Charge Current

1.0C5A

Charge Cut-off Voltage

4.2±0.03V

 
3. Standard Discharge     Graph # 3. Discharge Curve

Continuous Current

760mA

Max. Discharge Current

3.0C5A

Discharge Cut-off Voltage

2.5V

 

 

 

 
 
4. Environmental   Graph # 4 Discharge Curve at Different Temperature
 

Charge Temperature

0℃to 45℃(32F to 113F) @60±25% Relative Humidity

Discharge Temperature

-20℃to 60℃(-4F to 140F) @60±25% Relative Humidity

Storage Temperature

0℃to 40℃(32F to 104F) @60±25% Relative Humidity

Water Dust Resistance

/

 

Few Models Description

 

High Drain Type Cylindrical LiFePO4 Battery

Item No.

Battery Model

Nominal Voltage

Nominal Capacity

Dimension

Charge Current

Quick Charge

Max Cont

Discharge Rate

Max Plus Discharge Rate

Weight Approx (G)

Diameter

Height

(V)

(mAh)

(mm)

(mm)

1

IFR14500-5C

3.2

450

14

50.5

0.5C

1.5C

5C

8C

21

2

IFR18500-5C

3.2

1000

18.5

50.5

0.5C

1.5C

5C

8C

32

3

IFR18650-15C

3.2

1100

18.5

65.5

0.5C

1.5C

15C

20C

42

4

IFR18650-5C

3.2

1400

18.5

65.5

0.5C

1.5C

5C

8C

40

5

IFR22650-15C

3.2

1600

22.5

65.5

0.5C

1.5C

15C

20C

60

6

IFR22650-5C

3.2

2100

22.5

65.5

0.5C

1.5C

5C

8C

60

7

IFR26650-15C

3.2

2200

26.5

65.5

0.5C

1.5C

15C

20C

76

8

IFR26650-5C

3.2

3000

26.5

65.5

0.5C

1.5C

5C

8C

76

9

IFR32600-15C

3.2

3000

32.5

65.6

0.5C

1.5C

15C

20C

125

10

IFR32600-5C

3.2

3500

32.5

65.6

0.5C

1.5C

5C

8C

125

11

IFR32900-15C

3.2

4500

32.5

90.5

0.5C

1.5C

15C

20

188

12

IFR32900-5C

3.2

5000

32.5

90.5

0.5C

1.5C

5C

8C

188

13

IFR42120-5C

3.2

12000

42.5

120.5

0.5C

1.5C

5C

8C

355

 

 
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