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od **Winshinepower** » 16 kvě 2022 08:50

What are lithium iron phosphate batteries? What are its features and advantages?

od **Winshinepower** » 16 kvě 2022 08:50

Answers to the above questions are given below：
In the 1970s, M.S. Whittingham of Exxon used titanium sulfide as the positive electrode material and lithium metal as the negative electrode material to make the first lithium battery. In 1980, J. Goodenough discovered that lithium cobalt oxide can be used as the positive electrode material for lithium-ion batteries. Batteries are widely used. Today, Winshinepower will introduce one of the lithium-ion batteries: lithium iron phosphate batteries. Come and see it with me.

Introduction of lithium iron phosphate battery
From the positive and negative materials, lithium batteries are also divided into: lithium cobalt oxide (LiCoO2) batteries, lithium manganate (LiMn2O4), lithium iron phosphate batteries

In the first lithium battery launched by Sony, the positive electrode material is lithium cobalt oxide, and the negative electrode material is carbon. Among them, the main factor that determines the maximum rechargeable capacity and open-circuit voltage of the battery is the positive electrode material.

Lithium iron phosphate battery refers to a lithium battery that uses lithium iron phosphate as a positive electrode material. There are many kinds of cathode materials for lithium batteries, mainly lithium cobaltate, lithium manganate, lithium nickelate, ternary materials, lithium iron phosphate, etc. Among them, lithium cobalt oxide is the cathode material used in most lithium batteries at present, while other cathode materials have not been mass-produced in the market due to various reasons. Lithium iron phosphate is also one of the lithium batteries. In terms of material principle, lithium iron phosphate is also an intercalation/deintercalation process, which is exactly the same as lithium cobaltate and lithium manganate. LiFePO4 batteries are used to make lithium secondary batteries, and now the main direction is power batteries, which have great advantages over NI-MH and Ni-Cd batteries.

Characteristics of lithium iron phosphate batteries
1. Super long life

The cycle life of long-life lead-acid batteries is about 300 times, and the maximum is 500 times, while the cycle life of lithium iron phosphate power batteries can reach more than 2,000 times, and the standard charging (5-hour rate) can reach 2,000 times. The lead-acid battery of the same quality is "new half year, old half year, and maintenance and maintenance for half a year", which is 1-1.5 years at most, while lithium iron phosphate battery will reach 7-8 years when used under the same conditions. Taken together, the price-performance ratio will be more than 4 times that of lead-acid batteries.

2. Safe to use

Lithium iron phosphate completely solves the hidden safety problems of lithium cobalt oxide and lithium manganate. Lithium cobalt oxide and lithium manganate will explode under strong collision, posing a threat to the life safety of consumers. Safety tested to prevent explosions even in the worst traffic accidents.

It can quickly charge and discharge with high current 2C. Under the special charger, the battery can be fully charged within 40 minutes at 1.5C, and the starting current can reach 2C, but lead-acid batteries do not have this performance now.

lithium iron phosphate battery

3. High-temperature resistance

The electric heating peak of lithium iron phosphate can reach 350℃-500℃, while lithium manganate and lithium cobaltate are only around 200℃. The working temperature range is wide (-20C--+75C), and the electric heating peak of lithium iron phosphate with high-temperature resistance can reach 350℃-500℃, while lithium manganate and lithium cobaltate are only around 200℃.

Advantages of lithium iron phosphate batteries
The new generation of electric vehicles uses a new lithium iron phosphate battery as its power core. This green power has many characteristics and advantages.

1, the security is quite high

To power a car, safety is the overriding priority. Although the safety of ordinary lithium batteries can be basically guaranteed, there is a possibility of fire and explosion under extreme conditions.

As the second-generation product of lithium battery, lithium iron phosphate battery has stable physical properties. Combined with the built-in overvoltage, undervoltage, overcurrent, overcharge and other protection functions of the battery pack, it does not explode or catch fire. It is currently the only absolutely safe in the world. Lithium Ion Battery. Due to the use of high thermal stability materials and careful process design, battery safety and reliability are greatly enhanced. Compared with the explosion phenomenon that may occur in improper use of lithium batteries, lithium iron phosphate batteries will not explode even if thrown into fire. The high temperature stability can reach 400-500°C, ensuring the inherent high safety of the battery; it will not explode or burn due to overcharge, high temperature, short circuit, and impact. After rigorous safety testing, it will not explode even in the worst traffic accidents.

2. Long life and low cost

As a power battery, the service life (cycle performance) is closely related to the overall cost of use. Compared with the cycle life of ordinary lithium batteries of about 500 times, lithium iron phosphate batteries can be charged and discharged 1500 times at room temperature, and the capacity retention rate is 95%. Above, and the cycle life of 50% capacity has reached more than 2,000 times, the continuous mileage life of the battery is more than 500,000 kilometers, and it can be used for about five years, which is 8 times that of lead-acid batteries, 3 times that of nickel-metal hydride batteries, and is cobalt About 4 times that of lithium-acid batteries. In addition, its production cost itself is lower than that of ordinary lithium batteries, which can undoubtedly greatly reduce the use and maintenance costs of electric vehicles.

At the same time, the discharge performance of lithium iron phosphate battery is also very good, the power curve is stable, and the anti-over-discharge ability is strong. After the ordinary lithium battery cell is lower than 3.2V, re-discharging is over-discharge, which may lead to scrap. However, the lithium iron phosphate battery still releases energy at 2.8V, and there is no problem of scrapping below 2.5V.

3. Easy to use and handle

We know that nickel-metal hydride and nickel-cadmium batteries have a strong memory effect, and ordinary lithium batteries also have a certain memory effect problem. It is necessary to "full discharge" as much as possible, which will bring inconvenience to the daily use of electric vehicles, while lithium iron phosphate batteries have no memory effect. This phenomenon, the self-discharge is small; there is no memory effect, no matter what state the battery is in, it can be used at any time, no need to discharge and then recharge, and the battery has excellent fast charging characteristics, fast charging with a special charger, half an hour can be fully charged 95 %about. The disposal of the battery after the end of its life is also worthy of our attention. The lithium iron phosphate battery does not contain any heavy metals and rare metals, is non-toxic, non-polluting, and complies with regulations. It is an absolute green battery. , if it is disposed of improperly after its disposal, it will cause secondary pollution to the environment, and the lithium iron phosphate material is pollution-free in both production and use.

Well, the above is all about the lithium iron phosphate battery today. It mainly introduces the concept, characteristics and advantages of the lithium iron phosphate battery. More information is continuously updated, and we will see you in the next issue.
For more information, please follow the link below:https://www.winshinepower.com/

od **xehoten389** » 25 kvě 2022 10:43

od **xehoten389** » 03 čer 2022 06:05

od **weslo** » 05 črc 2022 19:15

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