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Understand the difference between LiFePO4 and lithium batteries

Views: 200     Author: Ubest     Publish Time: 2023-08-14      Origin: Site


Understand the difference between LiFePO4 and lithium batteries

LiFePO4 and lithium batteries are two types of batteries commonly used in solar generators. They have different advantages, but manufacturers are increasingly preferring LiFePO4 batteries because they are more advantageous in terms of safety and performance.

Let us now look at the benefits and drawbacks of LiFePO4 batteries, lithium batteries, and some applications. Click here for 12V 50Ah LiFePO4 Lithium Battery.

LiFePO4 battery introduction

A LiFePO4 battery is a type of lithium-ion battery that uses LiFePO4 as the positive electrode material. Lithium-ion battery cathode materials primarily include lithium cobalt oxide, lithium manganate, lithium nickel oxide, ternary materials, LiFePO4, and others. The cathode material in the vast majority of lithium-ion batteries is lithium cobalt oxide.

The Benefits of LiFePO4 Batteries

1. The LiFePO4 battery has a long life and can be cycled over 2000 times. LiFePO4 batteries can be used for 7 to 8 years under the same conditions.

2. It is risk-free to use. LiFePO4 batteries have passed stringent safety tests and will not explode even in a car accident.

3. Quick charging. The battery can be fully charged after 40 minutes of 1.5-C charging using a special charger.

4. The LiFePO4 battery is resistant to high temperatures, with a hot air value ranging from 350 to 500 degrees Celsius.

5. The capacity of the LiFePO4 battery is large.

6. There is no memory effect with the LiFePO4 battery.

7. The LiFePO4 battery is non-toxic, non-polluting, has a diverse range of raw material sources, and is inexpensive.

The disadvantages of LiFePO4 batteries

1. The tap density of the positive electrode of the LiFePO4 battery is low, ranging between 0.8 and 1.3.

2. When charged and discharged at high temperatures, the electrical conductivity is poor, the diffusion rate of lithium ions is slow, and the actual specific capacity is low.

3. The LiFePO4 battery's low-temperature performance is subpar.

4. The life of a single LiFePO4 battery is approximately 2000 times, but the life of a LiFePO4 battery pack is approximately 500 times.

LiFePO4 battery applications

1. Buses, electric vehicles, sightseeing vehicles, hybrid vehicles, and other large electric vehicles;

2. Electric bicycles, golf carts, small flat-panel battery vehicles, forklifts, cleaning vehicles, electric wheelchairs, and so on;

3. Power tools, such as electric drills, chainsaws, and lawnmowers;

4. Control cars, boats, airplanes, and other toys remotely;

5. Solar and wind energy storage equipment, such as solar generators and portable power stations;

6. UPS and emergency lights, warning lights, and miner's lights (for maximum protection);

7. In the camera, replace the 3V primary lithium battery with a 9V nickel-cadmium or nickel-metal hydride rechargeable battery (same size).

8. Portable and small medical equipment, etc.

An Overview of Lithium Batteries

A lithium battery is a type of battery that uses a non-aqueous electrolyte solution and uses lithium metal or lithium alloy as the negative electrode material. Because of lithium metal's highly active chemical properties, its processing, storage, and use have stringent environmental requirements. As a result, lithium batteries haven't been used in a long time. Lithium batteries have now become commonplace due to advances in science and technology.

Advantages of Lithium Batteries

1. High energy density. It has a high storage energy density of 460-600 Wh/kg, which is approximately 6-7 times that of lead-acid batteries.

2. A battery with lithium ferrous phosphate as the positive electrode has a service life of up to 6 years, can be used 10,000 times, and can be charged and discharged at 1C (100% DOD);

3. The rated voltage is high (the single operating voltage is 3.7V or 3.2V), roughly equal to the series voltage of three nickel-cadmium or nickel-hydrogen rechargeable batteries, making it convenient to assemble a battery power pack. Lithium batteries can also be changed to a different type of lithium battery. 3.0 volts has been set as the voltage, which is appropriate for using small electrical appliances;

4. LiFePO4 lithium-ion batteries for electric vehicles have a high power tolerance and a 15–30 °C charge and discharge capacity, which is useful for high-intensity startup acceleration;

5. One of the battery's most notable benefits is its extremely low self-discharge rate, which is typically less than 1% per month and represents less than 1/20 of that of a nickel-metal hydride battery;

6. Lightweight: When compared to lead-acid products of the same volume, it weighs about 1/6 to 1/5 as much.

7. High and low-temperature adaptability; after technical treatment, it can be used in environments with temperatures ranging from -20°C to 60°C.

8. There are no toxic or harmful heavy metal elements or substances, such as lead, mercury, or cadmium, in green and environmental protection, regardless of production, use, or scrap.

Water is not used during production, which is very advantageous for my country since there is a water shortage. Specific energy is the amount of energy per unit of mass or volume. The units of specific energy are Wh/kg or Wh/L. Energy is measured in units of Wh, where W stands for watts, h for hours, kg for kilograms, and L for liters.

Issues with Lithium Batteries

1. Explosion risk exists with lithium primary batteries due to poor safety.

2. Lithium-ion batteries made of lithium cobalt oxide are pricy, have poor safety, and cannot be discharged at high currents.

3. To prevent overcharging and over-discharging, all lithium-ion batteries must have circuit protection.

4. Both the cost and the production requirements are high.

5. The use of high and low temperatures is risky and has restricted usage conditions.

Areas where lithium batteries are used

1. Power for traffic

2. Power supply for electric energy storage

3. Power of mobile communication

4. Power from new energy storage

5. Military aerospace power supply

The distinction between lithium and LiFePO4 batteries

Batteries made of LiFePO4 are distinct from those made of lithium.

1. Lithium-ion secondary batteries are made of LiFePO4 batteries. The focus right now is on powering batteries. They have many advantages over NI-H and Ni-Cd batteries.

2. A lithium battery is a type of battery that uses a non-aqueous electrolyte solution and lithium metal or lithium alloy as the positive electrode material. Due to the highly reactive nature of lithium metal's chemical characteristics, the environmental impact of processing, storing, and using lithium metal is very high.

3. The lithium battery will explode or catch fire if it is pierced, while LiFePO4 won't.

4. LiFePO4 can withstand 100% overcharging without igniting or exploding, whereas lithium batteries will degas and inflate when the target value is reached.

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