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Lithium ion secondary battery

一种二次电池、锂离子的技术，应用在二次电池、电池组零部件、电池盒/外套等方向，能够解决可靠性降低、差再现性等问题

Inactive Publication Date: 2005-04-27
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, such safety holes provide poor reproducibility and thus reduced reliability

Method used

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Examples

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Embodiment Construction

[0047] Reference will now be made in detail to the embodiments of the invention, examples illustrated in the drawings, wherein like reference numerals refer to like components throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0048] Figure 1A A perspective view showing a lithium ion secondary battery 100 according to an embodiment of the present invention, Figure 1B for Figure 1A An exploded perspective view of the lithium-ion secondary battery shown, Figure 1C for along Figure 1A A cross-sectional view extracted from line 1-1, and Figure 1D A cross-sectional view of a state in which the safety hole of the box body is destroyed is shown.

[0049] As shown in the figure, the lithium ion secondary battery according to the present invention includes an electrode device 110 that generates a potential difference, a box body 120 having a rectangular parallelepiped shape to accommodate the electrode device...

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Abstract

A lithium ion secondary battery in which a safety vent as a safety device for a swelling phenomenon functions under a low pressure. A notch is formed in an inner surface of a large-area wall of the secondary battery, and an auxiliary notch is formed in an outer surface to correspond to the notch formed in the inner surface.

Description

[0001] This application claims priority from Korean Patent Application No. 2003-72928 filed with the Korean Intellectual Property Office on October 20, 2003, the entire disclosure of which is incorporated herein by reference. technical field [0002] The present invention relates to a lithium ion secondary battery, and more particularly, to a lithium ion secondary battery with a polygonal cross-section, which can improve safety and reliability by making a safety hole easy to break under low pressure. Background technique [0003] Generally, a lithium-ion secondary battery having a polygonal cross-section includes an electrode assembly formed by an anode plate with an anode active material rolled into a jelly roll shape, a cathode plate with a cathode active material, and a separator on the anode plate. and the cathode plate to prevent short circuits and allow only lithium ions to move; a case combined with the electrode assembly; a cover device that closes the case and preven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/05H01M10/0525H01M10/0566H01M10/0587H01M50/103H01M50/609
CPCH01M10/0587H01M2/1241Y02E60/122H01M2/0202H01M10/0525H01M2/36Y02E60/12Y02E60/10H01M50/3425Y02P70/50H01M50/609H01M50/103
Inventor 金俊虎
Owner SAMSUNG SDI CO LTD
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