When the battery is charged, lithium ions migrate from the surface of the lithium iron phosphate crystal to the surface of the crystal, under the use of electric field force, into the electrolyte, through the diaphragm, and then migrate through the electrolyte to the surface of the graphite crystal, and then embedded in the graphite lattice. At the same time, electrons flow through the conductive body to the positive aluminum foil collector, through the ear, battery pole, external circuit, negative pole, negative ear flow to the negative copper foil fluid collection, and then through the conductive body flow to the graphite negative electrode, so that the negative electrode charge to balance. Lithium iron phosphate is converted to iron phosphate when lithium ions are removed from lithium iron phosphate.

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