The positive electrode of lithium ion battery is made of lithium iron phosphate material, which has great advantages in terms of safety performance and cycle life. These are one of the most important technical indicators of power batteries. Lifepo4 battery 1C charge and discharge cycle life up to 2000 times, puncture does not explode, overcharge is not easy to burn and explode. Lithium iron phosphate cathode materials make large-capacity lithium-ion batteries easier to use in series.

Lithium Iron Phosphate Cathode Material

Lifepo4 battery refers to a lithium ion battery using lithium iron phosphate as the positive electrode material. Lithium-ion battery cathode materials mainly include lithium cobalt oxide, lithium manganate, lithium nickelate, ternary materials, and lithium iron phosphate. Among them, lithium cobalt oxide is the cathode material used in most lithium-ion batteries. In principle, lithium iron phosphate is also an intercalation and deintercalation process. This principle is the same as lithium cobalt oxide and lithium manganese oxide.

Lifepo4 battery advantage

1. High charging and discharging efficiency

The Lifepo4 battery is a lithium ion secondary battery. One of the main uses is for power batteries. It has great advantages over nickel-metal hydride and nickel-cadmium batteries. Lifepo4 battery has high charging and discharging efficiency, which can reach more than 90% in the discharged state, while that of lead-acid battery is about 80%.

2. Lifepo4 battery has high safety performance

The PO bond in the lithium iron phosphate crystal is stable and difficult to decompose. Even under high temperature or overcharge, it will not collapse or heat like lithium cobalt oxide, nor will it form strong oxidizing substances, so it has good safety.

It is reported that in actual operation, a small number of samples were found to burn in acupuncture or short-circuit tests, but no explosion occurred. In the overcharge experiment, a high voltage charge that was several times higher than the self-discharge voltage was used, and it was found that there was still a blasting phenomenon. Nevertheless, its overcharge safety is greatly improved compared to ordinary liquid electrolyte lithium cobalt oxide batteries.

3. Lifepo4 battery has a long cycle life

Lifepo4 battery refers to a lithium ion battery using lithium iron phosphate as the positive electrode material.

The cycle life of a long-life lead-acid battery is about 300 times, up to 500 times. The cycle life of the lithium iron phosphate power battery is more than 2000 times, and the standard charge (5 hour rate) can reach 2000 times.

Lead-acid batteries of the same quality “new half a year, old half a year, and half a year for maintenance” can be up to 1 to 1.5 years, while lifepo4 batteries will have a theoretical life of 7 to 8 years when used under the same conditions.

Comprehensive consideration, theoretically the cost-performance ratio is more than four times that of lead-acid batteries. High current discharge can use high current 2C to quickly charge and discharge. Under the special charger, the battery can be fully charged in 1.5 minutes at 1.5C, and the starting current can reach 2C, while the lead-acid battery has no such performance.

4. Good temperature performance

The peak temperature of lithium iron phosphate can reach 350℃-500℃, while lithium manganate and lithium cobaltate are only around 200℃. Wide operating temperature range (-20C-+75C), high temperature resistance, lithium iron phosphate electric heating peak can reach 350°C-500°C, while lithium manganate and lithium cobaltate are only at 200°C.

5. Lifepo4 battery high capacity

It has a larger capacity than ordinary batteries (lead-acid, etc.). The monomer capacity is 5AH-1000AH.

6. No memory effect

When the rechargeable battery is often not fully discharged, the capacity will quickly drop below the rated capacity. This phenomenon is called the memory effect. The memory is the same as Ni-MH and Ni-Cd batteries, but the lifepo4 battery does not have this phenomenon. No matter what state the battery is in, it can be charged and used without discharging and recharging.

7. Lightweight of lifepo4 battery

The lifepo4 battery of the same specification and capacity is 2/3 of the volume of the lead-acid battery, and the weight is 1/3 of the lead-acid battery.

8. Lifepo4 battery is environmentally friendly

The battery is generally considered to be free of any heavy metals and rare metals (the nickel-hydrogen battery requires rare metals), non-toxic (SGS certification), non-polluting, in line with European RoHS regulations, and is an absolute green battery certificate.

Therefore, the reason why lithium batteries are favored by the industry is mainly due to environmental considerations. Therefore, during the “Eleventh Five-Year Plan” period, the battery has been included in the “863” national high-tech development plan and has become a key national support and encouragement project.

With my country’s accession to the WTO, my country’s export of electric bicycles will increase rapidly, and electric bicycles entering Europe and the United States have been required to be equipped with pollution-free batteries.

The performance of lithium-ion batteries mainly depends on the positive and negative materials. Lithium iron phosphate is a lithium battery material that has only appeared in recent years. Its safety performance and cycle life are unmatched by other materials. The most important technical indicator of the battery.

Lifepo4 battery has the advantages of non-toxic, non-polluting, good safety performance, wide range of raw materials, low price and long life. It is an ideal cathode material for a new generation of lithium-ion batteries.