Composite material tape for lithium secondary battery and lithium secondary battery using the same

Abstract

A composite material tape and a lithium secondary battery using the same are provided. The composite material tape includes an organic base and at least one inorganic element dispersed within the organic base. The composite material tapes of the present invention exhibit improved insulative and heat-resistant characteristics.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims priority to and the benefit of Korean Patent Application Nos. 10-2004-0076136 filed Sep. 22, 2004, 10-2004-0076137 filed Sep. 22, 2004, and 10-2005-0045758 filed May 30, 2005 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. FIELD OF THE INVENTION [0002] The present invention relates to a composite material tape and a lithium secondary battery using the same. More particularly, the present invention relates to a composite material tape comprising an organic element and an inorganic element, and having improved adiabatic and heat-resistant characteristics. BACKGROUND OF THE INVENTION [0003] In general, unlike primary batteries, secondary batteries are rechargeable, enabling repeated charge and discharge cycles. Secondary batteries are extensively used in advanced electronic appliances, such as cellular phones, notebook computers and camcorders. [0004] Sec...

AI Technical Summary

Benefits of technology

[0009] The present invention is directed to a composite material tape and a lithium secondary battery using the same. The composite material tape comprises an organic element and an inorganic element, and has improved insulation and heat-resistant characteristics.

Problems solved by technology

The higher energy densities of lithium secondary batteries may cause heat-generation in the lithium secondary batteries during charging and discharging.

Thus, the electrode assembly generates a large amounts of heat.

In particular, the section of the electrode assembly to which the electrode plate and the electrode tab are welded contacts different metals, causing the internal resistance in the section to increase, thereby generating large amounts of heat.

Thus, heat may frequently be generated in the lithium secondary battery, causing battery malfunction, such as a short circuit.

Since the insulation tape or the adiabatic tape used for electrical or thermal insulation mainly comprises organic materials, such as PI (polyimide), PET (polyethyleneterephthalate) or PP (polypropylene), the heat generated in the lithium secondary battery may decrease the thermal or electric insulation characteristics of the insulation tape.

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