Energy-storage device, package structure of energy-storage device and method for fabrication thereof

Abstract

An energy storage device, a packaging structure of the energy storage device and a manufacturing method thereof. The packaging structure is composed of electroplating a metal layer on a first polymer layer, and then laminating a second polymer layer on the metal layer, wherein The material of the first polymer layer and the second polymer layer can be the same or different, and the overall structure has at least three layers. If the metal layer and the second polymer layer cannot be bonded, an adhesive layer can be used to bond the two, and then Put the positive and negative electrode plates and the separator into the two-piece packaging structure, then inject the electrolyte into it, and heat-press and vacuum-seal the packaging structure. Functional and highly secure energy storage devices.

Description

technical field [0001] The invention relates to an energy storage device and its packaging structure, in particular to a packaging structure with an electroplated metal layer, an energy storage device containing the packaging structure, and a manufacturing method thereof. Background technique [0002] Since the use of aluminum foil bags, they have been frequently seen in our lives and are indispensable items. From food packaging to industrial supplies, they are widely welcomed by consumers due to their low price and easy access to raw materials. Aluminum metal has low activity and is not easy to produce complex reactions with external substances, and the aluminum oxide layer formed by it and air is tough and has strong corrosion resistance, which is suitable for erection in industrial areas and suburban areas. Excellent electrical conductivity. Compared with the equivalent resistance, although the cross-sectional area of ​​aluminum is 1.6 times that of copper, its weight is ...

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Problems solved by technology

[0005] However, the weight and volume of stainless steel cans are large and difficult to seal, resulting in a lack of change in appearance, and it is difficult to achieve a real thinner battery. Because metal cans are not easy to use, the aluminum foil laminated lithium battery packaging method was later developed. Although its The mechanical strength is not as good as that of stainless steel cans, but in terms of weight and volume, aluminum foil packaging is superior to metal cans. However, aluminum foil packaging is generally made of rolled aluminum. Although its ductility is quite good, the thickness of its shell almost occupies Half the thickness of the battery, there are still defects in terms of flexibility and thickness

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