Base film layer structure used for lithium ion battery and preparation method

Abstract

The invention discloses a base film layer structure used for a lithium ion battery and a preparation method. The base film layer structure comprises a base film A film and a base film B film; and thepreparation method comprises the following steps of preparing the base film A film, the base film B film and the base film layer structure. By virtue of the preparation method, microcosmic and objective distribution uniformity and consistency of active carbon and conductive carbon in an electrode can be improved, the strength of an electrode thin film is improved, and the internal resistance of the electrode is lowered; by virtue of scientific and reasonable structure, static in the lithium ion battery can be removed through anti-static particles, thereby achieving interference prevention; through a gel polymer electrolyte, lithium ion conductivity is improved; through a PP film layer and a PE film layer, high temperature resistance is realized, so that base film layer swelling and electrolyte leakage in the interior of the battery caused by an overhigh internal temperature can be avoided; through a resin film, a gluing effect is achieved, so that an insulating strip can be glued withthe gel polymer electrolyte; and the preparation method is scientific and reasonable, simple and efficient.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a base film layer structure and a preparation method for a lithium ion battery. Background technique [0002] Lithium-ion battery: It is a secondary battery (rechargeable battery) that mainly relies on lithium ions to move between the positive and negative electrodes to work. During the charge and discharge process, Li+ intercalates and deintercalates back and forth between the two electrodes: during charging, Li+ deintercalates from the positive electrode, intercalates into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Batteries generally use materials containing lithium elements as electrodes, which are representatives of modern high-performance batteries. Lithium-based batteries are divided into lithium batteries and lithium-ion batteries. Lithium-ion batteries are used in mobile...

AI Technical Summary

Problems solved by technology

With the rapid development of the electronic industry, people's requirements for batteries are also constantly increasing. However, the existing lithium-ion batteries lack high-temperature-resistant built-in PP film layers and built-in PE film layers, which often result in excessive battery internal temperature. High causes swelling and damage of the battery, and the existing lithium batteries on the market generally use copper foil as the motor inside. Due to the high cost of copper foil, the production cost is increased and the promotion of lithium batteries is limited, and there is a lack of flame retardancy. components, causing lithium-ion batteries to become a medium for fire, often due to high temperatures

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