The Working Principle of Lithium Iron Phosphate Battery Energy Storage System

The Working Principle of Lithium Iron Phosphate Battery Energy Storage System

Summary

The lithium iron phosphate battery energy storage system has a long service life and is very environmentally friendly. This article will specifically introduce the working principle of the lithium iron phosphate battery energy storage system.

the working principle of the lithium iron phosphate battery energy storage system

The lithium iron phosphate battery energy storage system consists of a lithium iron phosphate battery pack, a battery management system (BMS), a converter device (rectifier, inverter), a central monitoring system, and a transformer. The following is the working principle of the lithium iron phosphate battery energy storage system.

Principle of energy conversion

In the charging stage, the intermittent power supply or the grid charges the energy storage system, and the alternating current is rectified into direct current through the rectifier to charge the energy storage battery module and store energy. 

In the discharging phase, the energy storage system discharges to the grid or load. The DC power of the energy storage battery module is inverted into AC power through the inverter. The central monitoring system controls the inverter output to provide stable power output to the grid or load.

Principle of charge and discharge

The charge-discharge reaction of lithium iron phosphate batteries is carried out between LiFePO4 and FePO4. During the charging process, LiFePO4 gradually separates from lithium ions to form FePO4. In the discharge process, lithium ions intercalate into FePO4 to form LiFePO4.

When a lithium battery is charged, lithium ions migrate from the lithium iron phosphate crystal to the surface of the crystal. Under the action of the electric field force, they enter the electrolyte, then pass through the diaphragm, and then migrate to the surface of the graphite crystal through the electrolyte, and then are embedded in the graphite. 

At the same time, electrons flow through the conductor to the aluminum foil collector of the positive electrode, pass through the positive pole of the battery, the external circuit, the negative pole, and the negative tab, and then flow to the graphite negative pole through the conductor, so that the charge of the negative electrode reaches to balance. After the lithium ions are deintercalated from the lithium iron phosphate, the lithium iron phosphate is converted into iron phosphate.

When a lithium battery is charged, lithium ions migrate from the lithium iron phosphate crystal to the surface of the crystal. Under the action of the electric field force, they enter the electrolyte, then pass through the diaphragm, and then migrate to the surface of the graphite crystal through the electrolyte, and then are embedded in the graphite. 

At the same time, electrons flow through the conductor to the positive aluminum foil collector, through the battery positive electrode, an external circuit, negative electrode, and negative electrode sheet, and then flow to the graphite negative electrode through the conductor to balance the charge of the negative electrode. After the lithium ions are deintercalated from the lithium iron phosphate, the lithium iron phosphate is converted to iron phosphate.

The lithium iron phosphate battery energy storage system manufactured by GARAYE has a long cycle life and excellent performance and can be used in various fields. If you want to know more about the lithium iron phosphate battery energy storage system after reading the above, you can get professional solutions by contacting us.

We are a solution and product supplier for lithium battery energy storage systems. We have a number of invention patents and are committed to providing customers with safe, lightweight, and durable green energy products. If you want to know the related solutions of lithium battery energy storage systems, please contact us immediately!