What are the advantages and disadvantages of lithium iron phosphate batteries

Advantages:

1, improvement in safety performance: The P-O bond in lithium iron phosphate crystal is stable and difficult to decompose, even at high temperature or overcharge, it will not collapse and heat like lithium cobalt, or form a strong oxidizing substance, so have Good safety.

2, improve life: lithium iron phosphate batteries refer to lithium-ion batteries using lithium iron phosphate as a positive material. The long-life lead-acid battery has a cycle life of about 300 times and a maximum of 500 times, while the lithium iron phosphate power cell has a cycle life of more than 2,000 times. The standard charge (5-hour rate) can be used up to 2,000 times.

3, high-temperature performance: lithium iron phosphate thermal peak up to 350 °C -500 °C while lithium manganese and lithium cobalt acid only around 200 °C. The operating temperature range is wide (-20C -- 75C), and the thermal peak of lithium iron phosphate with high-temperature resistance can reach 350 °C -500 °C, while lithium manganese and lithium cobalt acid are only around 200 °C.

4, large capacity: No matter what the battery is in, can be filled with the use, do not need to put the first before charging.

5, lightweight: the equal size of lithium iron phosphate battery volume is two-thirds of the volume of lead-acid battery, weight is 1/3 of a lead-acid battery.

6, environmental protection: Lithium iron phosphate batteries are generally considered to contain no heavy metals and rare metals (nickel-metal hydride batteries require rare metals), non-toxic(SGS certification), pollution-free, in accordance with European RoHS regulations, is an absolute green environmental protection battery certificate.

Disadvantages:

1, the lithium iron phosphate battery has a low tap density and a density of generally 0.8 to 1.3. Big size.

2, in the process of sintering during the preparation of lithium iron phosphate, iron oxide has the possibility of being reduced to elemental iron in a high-temperature reducing atmosphere. Simple iron can cause a micro short circuit in the battery.

3, Poor low-temperature performance of lithium iron phosphate battery: There are some performance defects in lithium iron phosphate, such as low tap density and compaction density, resulting in the low energy density of lithium-ion battery. Low-temperature performance is poor, even if it is nano-sized and carbon coated, it does not solve this problem.

4, the material preparation cost and the battery manufacturing cost are higher, the battery yield is low, and the consistency is poor.

The life of a lithium iron phosphate battery is long, about 2,000 times, but the life of a lithium iron phosphate battery is short, usually about 500 times.

Principle and structure of lithium iron phosphate battery:

1, the current commercialization of lithium iron phosphate batteries is generally composed of the following parts: positive material (lithium iron phosphate), negative material(graphite), as well as aluminum foil(positive), copper foil(negative) as a positive polar set fluid, Positive and negative polar ears (ie, derived from set fluids).

2, there are a diaphragm, electrolyte, aluminum plastic film, battery protection plate. It uses a winding type and is made into a 18650 battery.

3, the principle is that when the discharge, the Li-ion from the negative pole migration to the positive pole; When charged, the Li-ion migrates from the positive to the negative pole and is a rocking chair battery.

Advantages of lithium iron phosphate batteries

1. Lithium iron phosphate batteries have a long life and a cycle life of more than 2,000 times. Under the same conditions, lithium iron phosphate batteries can be used for 7 to 8 years.

2, use safety. Lithium iron phosphate batteries undergo rigorous safety tests and do not explode even in traffic accidents.

3, charging fast. Use a dedicated charger, 1.5 C charging 40 minutes can make the battery full.

4, lithium iron phosphate battery high temperature, lithium iron phosphate battery heat wind value can reach 350 to 500 degrees Celsius.

5, lithium iron phosphate battery capacity is large.

6, lithium iron phosphate battery has no memory effect.

7. Lithium iron phosphate batteries are green, non-toxic, non-polluting, and have a wide range of raw materials and cheap prices.

Disadvantages of lithium iron phosphate batteries

1, lithium iron phosphate battery positive electrode vibration density is small, density is generally about 0.8 to 1.3. Large size.

2, poor electrical conductivity, lithium ion diffusion speed is slow, high multiple charge and discharge, the actual specific capacity is low.

3, lithium iron phosphate battery low-temperature performance.

The life of a lithium iron phosphate battery is long, about 2,000 times, but the life of a lithium iron phosphate battery is short, usually about 500 times.

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