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The advantages of lithium iron phosphate battery and the use of lithium iron battery. The full name of lithium iron phosphate battery is lithium iron phosphate battery. Because its performance is particularly suitable for power use, the word "power" is added to the name, namely lithium iron phosphate power battery. Iron lithium ion battery has high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, and can charge and discharge large current. It is the best lithium battery with large current output at present.

Advantages of lithium iron phosphate battery

1. The lithium iron phosphate battery has a long service life and a cycle life of more than 2000 times. Under the same conditions, lithium iron phosphate battery can be used for 7 to 8 years.

2. Use safety. After strict safety detection, lithium iron phosphate battery will not explode even in traffic accidents.

3. Fast charging. Use a special charger to charge the battery at 1.5C for 40 minutes.

4. The lithium iron phosphate battery can withstand high temperature, and the thermal wind value of the lithium iron phosphate battery can reach 350 to 500 degrees Celsius.

5. Lithium iron phosphate battery has large capacity.

6. Lithium iron phosphate battery has no memory effect.

7. Lithium iron phosphate battery is green, non-toxic, non-polluting, with a wide range of raw materials and cheap price.

Structure and working principle of lithium iron phosphate battery

As the positive pole of the battery, the lithium iron phosphate battery is connected by aluminum foil and the positive pole of the battery. In the middle is a polymer diaphragm, which separates the positive pole from the negative pole, but the lithium ion Li can pass through and the electronic e - cannot. On the right is the negative pole of the battery composed of carbon (graphite), which is connected by copper foil and the negative pole of the battery. The electrolyte of the battery is between the upper and lower ends of the battery, and the battery is sealed by a metal shell.

When the lithium iron phosphate battery is charged, the lithium ion Li in the positive electrode migrates to the negative electrode through the polymer membrane; During the discharge process, lithium ion Li in the negative electrode migrates to the positive electrode through the diaphragm. Lithium-ion battery is named after the migration of lithium ions during charging and discharging. It should be noted here that there are some differences in various performance parameters of lithium iron phosphate power batteries processed by different factories; In addition, some battery performances are not included, such as battery internal resistance, self-discharge rate, charge and discharge temperature, etc.

Application of lithium iron phosphate battery

Lithium iron phosphate battery is a lithium ion secondary battery. An important use is as a power lithium battery. It has great advantages over NI-MH and Ni-Cd batteries. The charge and discharge efficiency of lithium iron phosphate battery is relatively high, ranging from 85% to 90%. The lead acid battery is about 80%.

Lithium iron phosphate battery has a critical use for safety of electric vehicles. In recent years, the rapid development of electric vehicles has led to the development of lithium iron phosphate battery for power. As the power source of electric vehicles, the battery performance is not only related to the length of driving range of the whole vehicle, but also related to the safety and reliability of the product. It can be said that the development of lithium battery determines the future of pure electric vehicles.

If the lithium iron phosphate battery with high safety is used in the extended-program electric vehicle, it can not only improve the safety of the vehicle, but also fully use the specific energy and power, and has a long service life. In addition, China is rich in lithium resources, and there is no problem that cobalt and nickel resources are restricted. Therefore, China should take lithium iron phosphate battery as the focus of development, so that it can effectively support the marketization of incremental electric vehicles. It can effectively relieve the five major anxieties of pure electric vehicles, including mileage, safety, price, charging and follow-up battery.

China has established a complete material processing chain, and the price is increasingly reasonable; The battery processing level is continuously improved and the product performance is stable. The author believes that lithium iron phosphate battery should become the focus of the development of power lithium battery, and should encourage continuous research and improve product performance.

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