Flexible jelly roll type secondary battery

A technology of jelly rolls and electrodes, applied in secondary batteries, secondary battery manufacturing, batteries, etc., can solve problems such as electrode short circuit and battery stability degradation

Active Publication Date: 2015-07-08
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the part coated with the active material is bent, the parts are irreversibly transformed and the problem of short circuit in the electrode due to the separation of the electrode active material from the surface of the current collector may occur so that the stability of the battery may deteriorate

Method used

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  • Flexible jelly roll type secondary battery
  • Flexible jelly roll type secondary battery
  • Flexible jelly roll type secondary battery

Examples

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Embodiment Construction

[0033] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

[0034] Embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the shapes and sizes of elements may be exaggerated for clarity.

[0035] The reversibly flexible jelly-roll secondary battery according to the embodiment may be provided. Generally, a jelly-roll secondary battery may be formed by stacking a cathode and an anode on each other with a separation film interposed therebetween to be wound to have a jelly-roll form. The cathode and anode may include uncoated portions 11 that are not coated with active material. The battery can be flexible in the uncoated portion 11 so that it is possible t...

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PUM

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Abstract

There is provided a jelly-roll type electrode assembly. In the jelly-roll type electrode assembly including a cathode including a cathode active material coating layer and an anode including an anode active material coating layer, with a separation film interposed therebetween, and formed to be rolled, the jelly-roll type electrode assembly is characterized in that the anode and the cathode include uncoated portions, the uncoated portions are overlapped and include mirror images formed on a front surface and a rear surface, and the jelly-roll type electrode assembly is flexible in the uncoated portion. A pouch-type secondary battery, a battery pack and a device including the electrode assembly are provided. A flexible jelly-roll type secondary battery may be reversibly flexible while blocking the separation of an electrode active material from a current collector surface.

Description

technical field [0001] Aspects of the embodiments relate to a flexible jelly-roll secondary battery. Background technique [0002] Unlike primary batteries, which are not rechargeable, secondary batteries are rechargeable and dischargeable batteries. Secondary batteries are used in a wide range of applications, from small portable electronic devices to large electrical and electronic equipment such as hybrid vehicles. [0003] A secondary battery is constructed by allowing an electrode assembly to be embedded in a case, the secondary battery has a separation film as an insulator provided in the secondary battery between an anode and a cathode, and the secondary battery is mounted with a The separation membrane is provided together with the cover assembly of the external terminal in the case. The anode and the cathode are formed of an uncoated portion and a coated portion formed by coating a current collector with an active material. The uncoated parts of the anode and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/0587H01M2/02H01M50/105
CPCH01M2/0207H01M2/024H01M10/0431H01M2004/021H01M2/0275H01M10/0587H01M4/0404H01M2004/025H01M50/105H01M4/13Y02E60/10Y02P70/50H01M2220/20H01M50/463H01M50/538H01M50/20H01M2220/30H01M2220/10
Inventor 郑州永郑贤澈郑在彬安寅究
Owner LG ENERGY SOLUTION LTD
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