The unique feature of solar LiFePo4 battery (lithium iron phosphate battery) is the use of olive crystal structure, crystal is the shape after crystallization, divided into ionic / molecular / atomic / metal crystal, lithium-ion battery ionic crystal is taken from its cathode material in the arrangement of ionic compounds in the shape of the meaning, that is, by the positive and negative ion group in a certain proportion of the crystal formed by ionic bonding. Generally speaking, ionic crystals are brittle and hard, with high melting and boiling point characteristics, and can conduct electricity when molten or dissolved. The basis of all lithium-ion batteries, including lithium iron phosphate technology, is ionic conductivity.