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Electrode assembly with separated support tapes in secondary battery

A technology of electrode components and support bands, which is applied in battery electrodes, secondary batteries, secondary battery manufacturing, etc., and can solve problems such as increasing battery manufacturing costs, reducing battery performance, and increasing batteries

Active Publication Date: 2005-05-04
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the possibility of burning in the battery may increase due to hard short
[0007] Second, if a single support band strongly clamps the lower part of the electrode assembly, the electrolyte cannot sufficiently flow into the lower part of the electrode assembly, thereby reducing battery performance such as battery capacity
[0008] Third, since a single support band basically covers the entire area of ​​the lower part of the electrode assembly, a large number of individual support bands are required, thereby increasing the manufacturing cost of the battery
Therefore, this overuse of a single support strap must be reconsidered

Method used

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  • Electrode assembly with separated support tapes in secondary battery
  • Electrode assembly with separated support tapes in secondary battery
  • Electrode assembly with separated support tapes in secondary battery

Examples

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Embodiment approach

[0028] Figure 2a is a perspective view of an electrode assembly with a divided support band according to an exemplary embodiment of the present invention.

[0029] Such as Figure 2a As shown, the present invention comprises an electrode assembly 11 , a cathode tab 12 , an anode tab 13 and a separate support strip 24 .

[0030] To manufacture the electrode assembly 11, an active material is applied to both surfaces of the collector. Then, the collector electrode is dried and subjected to roll processing so that the collector electrode is cut into anode plates and cathode plates. In this state, the anode plate and the cathode plate are wound with a separator interposed between the anode plate and the cathode plate to form the electrode assembly 11 . That is, after anode plates and cathode plates are alternately arranged around the separator, an electrode assembly is formed by winding the anode plates and cathode plates in a spiral pattern using an elliptical winding mandrel...

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Abstract

Separated support tapes are attached to an electrode assembly which includes a negative electrode plate, a positive electrode plate, and a separator for performing charge and discharge operations. The separated support tapes are attached to a lower portion of the electrode assembly so as to allow the electrode assembly to be easily inserted into a can, while reducing the possibility of fire in a secondary battery caused by a hard short when the secondary battery is compressed due to external force applied thereto, preventing battery performance from being deteriorated by allowing electrolyte to sufficiently flow into a lower portion of the electrode assembly, and reducing a manufacturing cost of the secondary battery by minimizing the amount of separated support tape to be used.

Description

technical field [0001] The present invention relates to a secondary battery, and more particularly, to a support tape having an improved structure and attached to a lower portion of an electrode assembly in a jelly-roll form so that the electrode assembly can be easily embedded into a case of a prismatic secondary battery. Background technique [0002] A secondary battery has an electrode assembly including an anode plate, a cathode plate, and a separator. The electrode assembly is accommodated in a case made of aluminum or an aluminum alloy, and then an electrolyte is injected into the case. When the case is sealed in this state, a secondary battery is formed. An electrode terminal insulated from the case is disposed on the upper portion of the secondary battery to form a negative electrode or a positive electrode of the secondary battery. If the electrode terminal is positive, the case acts as a negative electrode, and if the electrode terminal is negative, the case acts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M4/00H01M50/119H01M50/534H01M50/538
CPCY02E60/12H01M10/049H01M10/0431H01M2/263H01M2/0277Y02E60/10H01M50/538Y02P70/50H01M50/119H01M50/534H01M10/0587H01M50/116H01M50/107
Inventor 金在雄
Owner SAMSUNG SDI CO LTD
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