What are the characteristics of lithium iron phosphate battery?

A Lithium iron phosphate battery is a kind of lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The rated voltage of the lithium iron phosphate battery cell is 3.2V, and the charging cut-off voltage is 3.6V~3.65V.

Here is the content list:

1.What is the charging and discharging principle of lithium iron phosphate battery?

2.What are the structural characteristics of lithium iron phosphate batteries?

3.What are the characteristics of lithium iron phosphate batteries?

What are the structural characteristics of lithium iron phosphate batteries?

On the left side of the lithium iron phosphate battery, the phosphate battery is a positive electrode made of LiFePO4 material with an olivine structure, which is connected to the positive electrode of the battery by aluminum foil. On the right of the lithium iron phosphate battery is the negative electrode of the battery composed of carbon (graphite), which is connected to the negative electrode of the battery by copper foil. In the middle of the lithium iron phosphate battery is a polymer separator, which separates the positive electrode from the negative electrode. Lithium ions can pass through the separator but electrons cannot pass through the separator. The lithium iron phosphate battery is filled with electrolytes, and the battery is hermetically sealed by a metal casing.

What are the charging and discharging principle of the lithium iron phosphate battery?

During the charging process of the lithium iron phosphate battery, part of the lithium ions in the lithium iron phosphate are released, transferred to the negative electrode through the electrolyte, and embedded in the negative electrode carbon material; at the same time, electrons are released from the positive electrode and reach the negative electrode from the external circuit to maintain the balance of chemical reactions. During the discharge process of a lithium iron phosphate battery, lithium ions are extracted from the negative electrode and reach the positive electrode through the electrolyte. At the same time, the negative electrode releases electrons and reaches the positive electrode from the external circuit to provide energy for the outside world.

What are the characteristics of lithium iron phosphate batteries?

(1) Higher energy density

According to reports, the energy density of the square aluminum-shell lithium iron phosphate batteries mass-produced in 2018 is about 160Wh/kg. In 2019, some excellent lithium iron phosphate battery manufacturers can probably achieve the level of 175-180Wh/kg. The manufacturer adopts the lamination process and the capacity is larger, or it can achieve 185Wh/kg.

(2) Good safety performance

The electrochemical performance of the cathode material of the lithium iron phosphate battery is relatively stable, which determines that the lithium iron phosphate battery has a stable charging and discharging platform. Therefore, the structure of the battery will not change during the charging and discharging process of the lithium iron phosphate battery, will not burn or explode, and it is still very safe even under special conditions such as short circuit, overcharge, squeeze, and needle puncture.

(3) Long cycle life

The 1C cycle life of lithium iron phosphate batteries generally reaches 2000 times, even more than 3500 times, which is higher than the cycle life of ternary batteries more than 1,000 times, while the cycle life of long-life lead-acid batteries is about 300 times.

It is the responsibility of each manufacturer to produce lithium iron phosphate batteries that meet the standards to ensure the healthy development of the lithium iron phosphate battery market. The champion power company conducts a large number of quality inspections on lithium iron phosphate batteries before leaving the factory, and the quality assurance rate is guaranteed. If you are engaged in the lithium iron phosphate battery business, you can consider using our cost-effective products.