High-corrosion-resistance multi-fluorine-coating-layer type soft package aluminum ion battery aluminum plastic film and manufacturing method thereof

Abstract

The intention relates to a high-corrosion-resistance multi-fluorine-coating-layer type soft package aluminum ion battery aluminum plastic film and a manufacturing method thereof. The aluminum-plasticfilm sequentially comprises a polypropylene layer, a first fluorine@ corrosion-resistant layer, an aluminum foil layer, a second fluorine@ corrosion-resistant layer and a fluorine@ layer from inside to outside, according to the invention, the stability characteristic of a fluorine material is utilized, and the fluorine@ corrosion-resistant layers and the fluorine@ layer are adopted, so that the problem of long-term corrosion resistance of the aluminum-plastic film for an aluminum-ion battery can be well solved; through fluorine coating and multi-layer compounding, the aluminum-plastic film hasexcellent corrosion resistance, barrier property, heat sealing property, ductility and puncture resistance, and can meet the aluminum-plastic film packaging requirements of quick charging, higher corrosion resistance, higher cycle index, higher reliability and higher safety of a soft package aluminum ion battery; the aluminum-plastic film prepared by the process can ensure the brightness and fullness of an aluminum foil to the maximum extent after being applied to the aluminum-ion battery for a long time, does not have oxidation corrosion phenomenon, and can be applied to packaging of soft-package lithium-ion batteries.

Description

technical field [0001] The invention relates to the field of packaging materials for soft-packed aluminum-ion batteries and soft-packed lithium-ion batteries, in particular to an aluminum-plastic film for high-corrosion-resistant multi-fluorine-coated soft-packed aluminum-ion batteries. Background technique [0002] Soft-packed aluminum batteries are the main direction of battery development in the future. How to achieve reliable packaging of soft-packed aluminum-ion batteries, and how to ensure, stabilize and improve the performance of soft-packed aluminum-ion batteries are important issues of great concern to relevant battery manufacturers. The performance of the battery is not only related to the electrolyte, separator, positive and negative materials inside the battery, but also closely related to the packaging aluminum-plastic film of the soft-packed aluminum-ion battery. The current soft-packed aluminum-plastic film is mainly used for the packaging of soft-packed lithi...

AI Technical Summary

Problems solved by technology

The current soft-packed aluminum-plastic film is mainly used for the packaging of soft-packed lithium-ion batteries, and the aluminum-ion battery can be charged in 1 minute at the fastest, and the number of cycles can reach more than 7,500 times. The requirements for corrosion-resistant environments are more stringent and complicated. meet its packaging requirements

[0003] Finally, the soft-packed aluminum-ion battery is packaged with aluminum-plastic film to form a finished battery. The quality of the packaged aluminum-plastic film has an important impact on the performance of the finished battery. If the quality of the aluminum-plastic film is not satisfactory, if there is aluminum foil in the battery When corrosion, perforation and other phenomena occur, the capacity of the soft-packed aluminum-ion battery will decrease, the voltage drop will increase, and the charge-discharge and cycle life of the battery will decline rapidly. In severe cases, the battery will even fail rapidly. Aluminum-plastic film materials are generally required to have extremely high corrosion resistance. Therefore, how to develop an aluminum-ion battery packaging aluminum-plastic film with high corrosion resistance and excellent heat sealing performance, barrier performance and various indicators has a long-term impact on this type of battery. Stable operation is very important

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