3.2v 20ah lifepo4 battery.The principle of charging and discharging of lithium iron phosphate batteries

　　The charge and discharge reaction of lithium iron phosphate batteries occurs between LiFePO4 and FePO4 phases. During the charging process, LiFePO4 gradually separates from lithium ions to form FePO4. During the discharge process, lithium ions are embedded in FePO4 to form LiFePO4.

　　When the battery is charged, lithium ions migrate from the lithium iron phosphate crystal to the surface of the crystal, enter the electrolyte under the action of electric field force, pass through the separator, and then migrate to the surface of the 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 lithium ions are removed from lithium iron phosphate, lithium iron phosphate is converted into iron phosphate.

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

　　At the same time, electrons flow through the conductive body to the copper foil collector of the negative electrode, through the electrode ear, battery negative pole, external circuit, positive pole, and positive pole ear to the aluminum foil collector of the positive electrode of the battery, and then through the conductive body to the lithium iron phosphate positive electrode, so that the charge of the positive electrode reaches equilibrium. After lithium ions are embedded in iron phosphate crystals, iron phosphate is converted into lithium iron phosphate

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