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1、 The different forms of electrolytes are crucial

Although the appearance and internal structure are different, the principles of these two types of batteries are basically the same. Both types of batteries have a positive electrode, negative electrode, and electrolyte. The positive electrode material is generally lithium cobalt oxide, lithium nickel cobalt manganese oxide (ternary material), lithium iron phosphate or lithium manganese oxide, etc. The negative electrode material is generally graphite, and the electrolyte is lithium hexafluorophosphate solution.

As the two mainstream power lithium-ion batteries in the current market, 18650 lithium-ion batteries and lithium polymer soft pack batteries are distinguished based on the packaging material of the shell. 18650 lithium-ion batteries are generally packaged in a steel shell (18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery), with the internal electrode plate and diaphragm structure being wound. The outer packaging of lithium polymer soft pack batteries uses aluminum plastic film, and the internal electrode plates and separators are stacked layer by layer.

The important difference between the two lies in the different form of electrolyte, one of the internal materials of the battery: the electrolyte inside the lithium polymer flexible battery is polymer, generally gel or solid, while the electrolyte inside the 18650 lithium ion battery is generally liquid.

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