Flexible electrical core

Abstract

The invention provides a flexible electrical core. The flexible electrical core comprises a first pole piece containing a first current collector and a first active material layer; a second pole piece containing a second current collector and a second active material layer; an isolated film; and an electrolyte. The first current collector comprises a first circumference blank area surrounding the first active material layer, but not comprising the first active material layer; the second current collector comprises a second circumference blank area surrounding the second active material layer, but not comprising the second active material layer; the isolated film comprises an insulating layer, a first polyolefin layer bonding at one side of the insulating layer and facing to the first active material layer, and a second polyolefin layer bonding the other side of the insulating layer and facing to the second active material layer, wherein, the first circumference blank area is bended and is bound with the first polyolefin layer, and the second circumference blank area is bended and bound with the second polyolefin layer.

Description

technical field [0001] The invention relates to the field of energy storage devices, in particular to a flexible electric core. Background technique [0002] Due to the many advantages of lithium-ion batteries, such as high voltage, small size, light weight, high specific capacity, no memory effect, no pollution, small self-discharge and long cycle life, etc., its application in the field of mobile devices has been unprecedented. development, including mobile phones, video cameras, notebook computers, and other portable appliances. With the development of technology for mobile and convenient devices and the increase in demand therefor, the demand for secondary batteries as energy sources is rapidly increasing. Among such secondary batteries, studies on lithium secondary batteries having high energy density and discharge voltage have been widely conducted, and are now widely used. [0003] With the interest of consumers, electronic equipment tends to be smaller and thinner....

AI Technical Summary

Problems solved by technology

However, affected by the flatness of the substrate, it is difficult to make the packaging interface tight no matter whether the silicone layer or other adhesive layer systems are used; and the use of the adhesive layer as the packaging material increases the material and manufacturing costs of the battery, which is not conducive to actual production and application.

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