What is the principle of charging and discharge of lithium iron phosphate batteries?home powerwall lithium ion battery

　　During the charging process, some lithium ions in lithium iron phosphate were removed, passed through the electrolyte to the negative electrode, and embedded in the negative electrode carbon material. At the same time, the electrons were released from the positive electrode, reached the negative electrode from the external circuit to maintain the balance of chemical reactions.

　　During the discharge process, the lithium ion was removed from the negative electrode, reached the positive electrode through the electrolyte, and the electrons were released at the same time.

　　The charging and discharge response of lithium iron phosphate batteries is performed between Lifepo4 and FEPO4. During the charging process, Lifepo4 gradually separated from lithium ions to form FePo4. During the discharge process, lithium ion was embedded in FEPO4 to form LIFEPO4.

　　During the battery charging, lithium ions are migrated from iron phosphate crystals to the surface of the crystal. Under the influence of the electric field, enter the electrolyte, then pass through the diaphragm, and then migrate to the surface of the graphite crystal through the electrolyte, and then embedded into the graphite lattice.

　　At the same time, the electronics conductive aluminum foil collector electrode flows to the positive electrode, and the copper foil collector flowing through the pole ear, battery positive column, external circuit, negative electrode column, and negative ears to the battery negative electrode, and then flows to the litteria negative electrode , Make the negative electrode charge to balance. Lithium ions are transformed into iron phosphate after lithium iron phosphate dehydrated.

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

　　At the same time, the copper foil collector flows to the negative electronics of the electronic meridian, through the aluminum foil collector of the aluminum foil of the polar ear, the negative column of the battery, the outer circuit, the positive pole column, and the positive polar ear to the battery. Lithium positive poles make the positive charge reach balance. Lithium ions are embedded after iron phosphate crystals, and iron phosphate is converted into lithium iron phosphate.

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