The Prospect of Lithium Iron Phosphate Battery - SCU

The Prospect of Lithium Iron Phosphate Battery

1. What is the development prospect of lithium iron phosphate battery?

High-performance batteries are crucial to the development of the new energy industry. Compared with lead-acid and nickel-hydrogen batteries, lithium-ion batteries have the advantages of high specific energy and long cycle life.

At present, lithium-ion batteries can be divided into two categories according to different cathode materials, one is lithium cobalt oxide, lithium nickel cobalt manganate and lithium manganate batteries.

The voltage of this type of battery is about 4V, and the specific energy can reach 140-150Wh/Kg, but the safety of the battery is poor, which is determined by the chemical properties of the positive electrode material itself, and is only suitable for use as a small-capacity battery;

The other type is lithium iron phosphate battery, the voltage platform of the battery is 3.2V, the specific energy is slightly lower than the previous type of battery, but the outstanding advantages of this battery are good safety, long cycle life, low cost and good environmental compatibility, so it is very suitable as a power source for various new energy electric vehicles and new energy storage.

Lithium iron phosphate UPS batteries can increase the energy storage efficiency of photovoltaic systems to 95%. Most of the current photovoltaic systems also use lead-acid batteries as energy storage devices.

However, in comparison, lithium iron phosphate battery replacement can give full play to its advantages, including improving battery energy storage efficiency, extending service life, and reducing unit costs.

This type of lithium battery is used as an energy storage device, which can increase the energy efficiency to 95%, far exceeding 70% to 80% of traditional lead-acid batteries, and has a service life of 2000 times of charge and discharge.

Although the cells still need further testing before they can be put into commercial PV systems. But research has shown that rack mount LiFePO4 battery holds promise for improving the efficiency of solar power systems, and that lithium iron phosphate batteries can help reduce their installation and maintenance costs.

The acid solution and heavy metals such as lead and chromium in the production process and after use of the lead-acid battery have long-term damage to the human body and the natural environment. At present, the phenomenon of random discarding of old lead-acid batteries is relatively common, and the recovery rate is low.

The European Union, Japan and other developed countries have already implemented a strict battery production license system and manufacturer recycling system, and in China, the battery production license system has also been launched.

Ⅱ. The advantages of lithium iron phosphate batteries

1. Large specific energy (up to 150WH per kilogram, 3 times that of lead-acid batteries and hydrogen-nickel batteries);

2. Small size (30% smaller than hydrogen-nickel battery);

3. Light weight (70% lighter than traditional batteries);

4. Long cycle life (the number of cycles is more than 2000 times);

5. Low self-discharge rate (only 3% self-discharge per month);

6. No memory effect (the depth of charge and discharge does not affect the capacity and life of the lithium iron phosphate battery);

7. Non-toxic and non-polluting (no toxic substances exist in battery materials).

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