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

a technology of composite material which is applied in the field of composite material tape and lithium secondary batteries, can solve the problems of increasing internal resistance in the section, increasing heat generation in the lithium secondary batteries, and increasing heat generation in the electrode assembly, so as to improve insulation and heat-resistant characteristics

Inactive Publication Date: 2006-05-04
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0035] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description and drawings, like reference numerals are used to designate like components in order to avoid repetitive descriptions of same or similar components.

[0036]FIG. 1 is a cross-sectional view of a composite material tape 10 according to one embodiment of the present invention. As shown, the composite material tape 10 includes an organic base 12 and a plurality of plate shaped inorganic elements 14 dispersed in the organic base 12. The composite material tape 10 is fabricated by mixing the organic base 12, which has a relatively low melting point, with the inorganic elements 14, which have relatively high melting points. Composite material tapes having this composition maintain their insulative and adiabatic characteristics as well as their shapes under high temperature conditions because the inorganic elements 14 remain intact even if the ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M2/16H01M4/66H01M6/10C08K3/22C08K3/28C08K7/00C08L101/00H01M10/05H01M10/052H01M10/058H01M50/119H01M50/121H01M50/129H01M50/136H01M50/202H01M50/571H01M50/586H01M50/595
CPCC08K3/20H01M2200/00C09J7/0264C09J2205/106C09J2423/006C09J2467/006C09J2471/006C09J2479/086C09J2481/006H01M2/0275H01M2/08H01M2/1022H01M2/32H01M2/34H01M10/052H01M10/0587H01M10/425Y02E60/122C08K3/28C09J7/22C09J2301/41Y02E60/10H01M50/571Y02P70/50H01M50/595H01M50/129H01M50/119H01M50/202H01M50/586H01M50/136H01M50/121
Inventor KIM, CHEON SOOLIM, HONG SUPLEE, SANG WON
Owner SAMSUNG SDI CO LTD
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