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Cylindrical lithium secondary battery and method of fabricating the same

A lithium secondary battery, cylindrical technology, applied in the field of cylindrical lithium secondary battery and its manufacturing, capable of solving problems such as battery defects

Active Publication Date: 2006-11-29
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Also, when an electrode assembly is inserted into a cylindrical case, protrusions formed on the electrode assembly due to the geometric deviation of the cylindrical shape may cause scratches on the cylindrical case or the electrode assembly, resulting in potential battery defects

Method used

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  • Cylindrical lithium secondary battery and method of fabricating the same
  • Cylindrical lithium secondary battery and method of fabricating the same
  • Cylindrical lithium secondary battery and method of fabricating the same

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Embodiment Construction

[0024] refer to Figures 1A to 1C , The cylindrical lithium secondary battery 100 according to the embodiment of the present invention includes: an electrode assembly 200, which generates a voltage difference during charging / discharging; a cylindrical case 300, used to accommodate the electrode 200; a cover assembly 400, connected to the cylindrical A cylindrical case 300 is assembled to prevent the electrode assembly 200 from being separated; an electrolyte 500 is injected into the cylindrical case 300 so that the lithium ions move in the electrode assembly 200 .

[0025] The electrode assembly 200 includes a first electrode plate 210 , a second electrode plate 220 and a separator 230 disposed between the first and second electrode plates 210 , 220 . In addition, the first and second electrode plates 210 , 220 and the separator 230 are wound into a circular cross-sectional shape, and then accommodated in the cylindrical case 300 . In this case, the first and second electrode...

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Abstract

A cylindrical lithium secondary battery includes an electrode assembly formed by stacking a first electrode plate having a first electrode tap, a second electrode plate having a second electrode tap, and a separator interposed between the first and second electrode plates. The first electrode plate, the second electrode plate and the separator are wound to form the electrode assembly. The secondary battery also includes a case for storing the electrode assembly and a cap assembly combined with an upper portion of the case to sealing the case. The radius of curvature of the second electrode tap is greater than the radius of curvature of the first electrode tap.

Description

technical field [0001] The present invention relates to a secondary battery, in particular, a cylindrical lithium secondary battery and a manufacturing method thereof. Background technique [0002] Recently, compact and lightweight electronic devices, such as cellular phones, laptop computers, and portable digital video cameras, have been widely developed and produced. These portable electronic devices are typically provided with battery packs so that the device can be operated anywhere. The battery pack has at least one battery to power the portable electronic device for a predetermined period of time. [0003] The production of rechargeable secondary batteries is usually cost-effective. For example, rechargeable secondary batteries such as nickel-cadmium batteries, nickel-hydrogen batteries, lithium batteries, and lithium-ion batteries are available in this technical field. [0004] Lithium secondary batteries have high energy density per unit weight and an operating vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M10/38H01M4/02H01M2/20H01M2/26H01M4/36H01M10/05H01M10/052H01M10/0587
CPCY10T29/49108H01M10/0431H01M10/052Y02E60/122H01M10/0587Y02E60/10Y02P70/50H01M50/107H01M50/538H01M10/0422H01M50/533
Inventor 全官植
Owner SAMSUNG SDI CO LTD
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