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In terms of materials used, the positive electrode materials of polymer lithium ion batteries are divided into lithium cobalt oxide, lithium manganate, ternary materials and lithium iron phosphate materials. The negative electrode is graphite, and the working principle of the battery is basically the same. The important difference between the positive electrode materials of polymer lithium ion batteries lies in the difference of electrolytes. Liquid lithium ion batteries use liquid electrolytes, and polymer lithium ion batteries use solid polymer electrolytes instead. This polymer can be dry or glued. At present, most of the polymer gel electrolytes are used.

The application and promotion of electrochemical batteries have changed the current industrial pattern. Among them, lithium batteries have developed rapidly in the field of power and energy storage. At present, the debate on the priority of the two popular lithium batteries, "lithium iron phosphate battery" and "ternary lithium battery", has never stopped. This year, the two are pushed to the forefront again.

In 1800, Alessandro Volta, an Italian physicist, invented the Volta stack, the first battery in human history. The first battery was made of zinc (anode) and copper (cathode) sheets and paper soaked in salt water (electrolyte), demonstrating the artificial possibility of electricity.

The battery module can be understood as the intermediate product of the battery cell and pack formed after the lithium ion battery cells are combined in series and parallel, and the single battery monitoring and management device is installed. Among the three common lithium battery packaging forms, the single energy density of the soft package lithium battery is the most easy to achieve, but when it comes to module design, the task of considering the overall safety of the product is the most important, which can be said to transfer part of the cell activity to the module structure.