Secondary battery with an improved safety

摘要

A secondary battery comprising a battery package which encloses the outer perimeter of the secondary battery and covers the entire outer surface of positive and negative electrodes and a portion of each terminal of the positive and negative electrodes, wherein the battery package is formed of a laminate film comprising an outer polymer layer, an inner aluminum layer and an adhesive layer formed on a portion of the inner surface of the aluminum layer, the aluminum layer of the battery package being electrically connected with either of the positive and negative is provided. Alternatively, at least one electrically conductive metal foil on at least one of the outer upper and lower surfaces of the battery package is provided.

主权项

1. A secondary battery comprising a battery package which encloses the outer perimeter of the secondary battery and covers the entire outer surface of positive and negative electrodes and a portion of each terminal of the positive and negative electrodes, wherein the battery package is formed of a laminate film comprising an outer polymer layer, an inner electrically conductive aluminum layer, and an adhesive layer formed on a portion of the inner surface of the aluminum layer, the aluminum layer of the battery package being electrically connected with only one of the positive terminal and the negative terminal without passing through the electrode and the aluminum layer being electrically insulated from the other electrode, and the adhesive layer being located between the terminals and the aluminum layer,
wherein the positive terminal and the negative terminal are extended outside of a sealing portion of the battery package in a same direction, wherein the positive terminal and the negative terminal are coated with a terminal film, the terminal film being positioned so as to not extend beyond the portion of each terminal of the positive and negative electrode covered by the battery package, and wherein the aluminum layer of the battery package and the positive or negative terminal is connected directly with each other or connected with each other by an electrically conductive material.