Secondary battery with improved film-like electrode structure

A secondary battery, film technology, applied in secondary batteries, secondary battery manufacturing, winding/folding electrodes, etc., can solve the problems of being very complicated, unusable, and limiting the tightness of electrode winding.

Inactive Publication Date: 2007-02-28
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of this secondary battery is too complicated, which increases the difficulty of the manufacturing process, so it is very complicated.
At the same time, the structure of this secondary battery is different from that of conventional cylindrical secondary batteries, so conventional equipment for manufacturing secondary batteries cannot be used.
In addition, for a high-capacity, compact battery, inserting an inner tube of such a large volume limits the tightness of the electrode winding.

Method used

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  • Secondary battery with improved film-like electrode structure
  • Secondary battery with improved film-like electrode structure
  • Secondary battery with improved film-like electrode structure

Examples

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Embodiment Construction

[0032] Accompanying drawing 1 is a sectional view of a cylindrical secondary battery, which shows the structure of the jelly-roll electrode of the secondary battery.

[0033] An electrode such as a positive electrode and a negative electrode can be manufactured in different ways depending on the type of electrode. Usually, as shown in Figure 1, the positive electrode 4 and the negative electrode 3 are coated with the binding liquid containing the positive electrode active material 4b and the negative electrode active material 3b on both sides of their respective base layers 4a and 3a, then it is dried, rolled and stamped And cut the base layers 3a and 3b according to the predetermined size. A separator 5 was inserted between the positive electrode 4 and the negative electrode 3 to prevent the positive electrode 4 from being electrically connected to the negative electrode 3, and finally they were wound up.

[0034] The obtained jelly-roll electrode 2 is placed in the battery ...

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Abstract

A secondary cell capable of ensuring thermal and mechanical stabilities required for a high-capacity cell with a simple structure is provided. The secondary cell includes: a can; and an electrode jelly-roll wound with two different electrodes and a separator interposed between the electrodes therein and accommodated in the can, the outer surface of the electrode jelly-roll being wound around one more turn with the separator. Only the separator is wound at the core of the electrode jelly-roll to form a rod-like stability member which is cured by absorbing heat generated from the cell. The separator wound at the core of the electrode jelly-roll is continuous from a portion of the separator which is stacked with the two different electrodes.

Description

[0001] priority claim [0002] This application is based on 35 U.S.C.19 and claims the priority of the serial number 2001-63715 entitled "Jelly Roll Electrode for Secondary Batteries" which I filed with the Korean Industrial Property Office on October 16, 2001. technical field [0003] The present invention relates to a secondary battery with a jelly-roll electrode in which a positive electrode, a separator and a negative electrode are wound together. More particularly, the present invention relates to a secondary battery with jelly-roll electrodes having improved structure and improved thermal stability. Background technique [0004] Secondary batteries can be recharged and can have a large electric capacity in a small size. Secondary batteries generally include nickel metal hydride batteries (Ni-MH), lithium batteries, lithium ion batteries (Li-ion), and lithium polymer batteries. Secondary batteries are classified into cylindrical batteries, rectangular batteries, and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M6/10H01M50/417
CPCH01M6/10H01M10/5004H01M10/0431H01M2/1653H01M10/504H01M10/653H01M10/613Y10T29/49108Y10T29/49115Y02E60/10Y02P70/50H01M50/417H01M10/654H01M10/643H01M50/463H01M10/0587H01M2200/00
Inventor 金由美申政淳
Owner SAMSUNG SDI CO LTD
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