Rechargeable battery with polymer electrolyte and forming method thereof

Abstract

The invention discloses a polymer electrolyte battery, comprising two electrodes, polymer electrolyte and a bag-shaped shell. Wherein, steps are formed to arrange among the largest area surface comprising a first area of an area lapped over an electrode contact and a second area forming the rest area. a manufacturing method of the polymer electrolyte battery comprises steps: putting an electrode component into the bag-shaped shell; after sealing the perimeter of the bag-shaped shell, forming a polymer bare battery via sealing the bag-shaped shell from outside; suppressing the largest area surface of the bag in which a surface structure comprising a step groove is arranged; and gelatinizing the electrolyte via exerting energy on the electrolyte. According to the invention, an active material layer and a polymer electrolyte interface are agglutinated with each other in the polymer electrolyte battery, and a contact area can be increased. Moreover, because of increasing ionic conductivity via narrowing the distance between polar plates, an internal resistance can be decreased, so as to prevent battery capacity from reducing.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2007-0029423 filed March 26, 2007, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a nonaqueous electrolyte rechargeable battery, and more particularly, to a polymer electrolyte battery having a pouch-shaped case. Background technique [0004] In recent years, the use of portable electronic devices has grown dramatically as electronic devices have become smaller and lighter with the rapid advancement of the electronics industry. More specifically, research and development of lithium rechargeable batteries have been actively conducted because batteries serving as power sources for portable electronic devices are required to have high energy density. In lithium rechargeable batteries, lithium metal oxide is used as an anode active material and carbon or carbon co...

AI Technical Summary

Problems solved by technology

However, a problem with the resin bond or adhesive layer is that it increases the internal ion conduction resistance due to the generally low ionic conductivity of the resin bond or adhesive layer.

And, there is a problem in that the capacitance per battery volume or the capacitance per battery weight decreases due to further penetration of impurities unrelated to the increase in battery capacity into the resin adhesive layer or adhesive layer.

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