What is the charging and discharging principle of Lithium iron phosphate battery.CR2032 battery

　　During the charging process, some lithium ions in Lithium iron phosphate are removed, transferred to the negative electrode through the electrolyte, and embedded in the carbon material of the negative electrode; At the same time, electrons are released from the positive electrode and reach the negative electrode from the external circuit, maintaining the balance of chemical reactions.

　　During the discharge process, lithium ions detach from the negative electrode and reach the positive electrode through the electrolyte. At the same time, the negative electrode releases electrons, which reach the positive electrode from the external circuit and provide energy to the outside world.

　　The charge discharge reaction of Lithium iron phosphate battery is carried out between LiFePO4 and FePO4. During the charging process, LiFePO4 gradually separates from lithium ion to form FePO4. During the discharge process, lithium ion is embedded in FePO4 to form LiFePO4.

　　When the battery is charged, lithium ions migrate from Lithium iron phosphate crystal to the crystal surface, enter the electrolyte under the effect of electric field force, then pass through the diaphragm, and then migrate to the surface of graphite crystal through the electrolyte, and then embed into the graphite lattice.

　　At the same time, electrons flow through the conductive body to the aluminum foil collector of the positive electrode, through the electrode ear, battery positive pole, external circuit, negative pole pole, and negative pole ear to the copper foil collector of the negative electrode of the battery, and then through the conductive body to the graphite negative electrode, so that the charge of the negative electrode reaches equilibrium. After the lithium ion is de embedded from Lithium iron phosphate, Lithium iron phosphate is converted into Iron(III) phosphate.

　　When the battery is discharged, lithium ions are disembedded from the graphite crystal, enter the electrolyte, pass through the diaphragm, migrate to the surface of Lithium iron phosphate crystal through the electrolyte, and then re embed into the lattice of Lithium iron phosphate.

　　At the same time, the electrons flow through the conductor to the copper foil collector of the negative pole, through the electrode lug, the battery negative pole, the external circuit, the positive pole, and the positive pole lug to the aluminum foil collector of the battery positive pole, and then through the conductor to the Lithium iron phosphate positive pole, so that the charge of the positive pole reaches balance. After lithium ion is embedded in Iron(III) phosphate crystal, Iron(III) phosphate is converted into Lithium iron phosphate.

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