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Mandrel used in manufacture of jelly roll-type electrode assembly

A fruit making and mandrel technology, applied in the direction of winding/folding electrodes, electrode manufacturing, electrical components, etc., can solve the problem of battery safety reduction and achieve the effect of ensuring safety and reducing winding stress

Active Publication Date: 2013-12-11
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the stress generated in the subsequent process, that is, the process of compressing the jelly-roll electrode assembly, is further applied to the folded portion of the sheet-type stack, the folded portion of the sheet-type stack is broken, thereby reducing the safety of the battery.

Method used

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  • Mandrel used in manufacture of jelly roll-type electrode assembly
  • Mandrel used in manufacture of jelly roll-type electrode assembly
  • Mandrel used in manufacture of jelly roll-type electrode assembly

Examples

Experimental program
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Embodiment Construction

[0044] Now, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted, however, that the scope of the present invention is not limited by the illustrated embodiments.

[0045] figure 2 and image 3 is a cross-sectional view typically showing a mandrel according to an embodiment of the invention, and Figure 4 is typically shown figure 2 Right side view of the mandrel.

[0046] Referring to these figures, the mandrel 100 is elliptical in a section perpendicular to the rotation center axis 30 of the mandrel 100, and the length H of the major axis of the mandrel 100 is about two times the length D of the minor axis of the mandrel 100. times.

[0047] Also, the mandrel 100 is configured to have a gentle elliptical configuration in which in a section perpendicular to the rotation center axis 30 of the mandrel 100, the inclination of the outer side of the mandrel 100 increases from the end of the...

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PUM

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Abstract

The present invention provides a mandrel used during a rolling process in a manufacture of a jelly roll-type electrode assembly out of a long sheet-type laminate comprising an anode / separator / cathode structure. The mandrel is characterized in that the shape of the vertical cross section of the mandrel with respect to the central rotational axis is elliptical; a length of a long axis is at least 1.5 times a short axis; and in the shape of the vertical cross-section with respect to the central rotational axis, a slope of the surface of the mandrel forms an elliptical structure with a continuous curve from the end of the short axis to the end of the long axis so that a rolling stress exerted, onto the sheet-type laminate, from the end of the long axis, is reduced during the rotation of the mandrel at a fixed speed when an end of the sheet-type laminate is rolled after being inserted into the middle section of the mandrel.

Description

technical field [0001] The present invention relates to a mandrel used in the manufacture of a jelly-roll type electrode assembly, and, more particularly, to a mandrel configured as a long sheet for use in a cathode / separator / anode structure type stack to manufacture a jelly-roll type electrode assembly, wherein in a section perpendicular to the central axis of rotation of the mandrel, the mandrel is elliptical and the length ratio of the major axis to the minor axis of the mandrel is 1.5 or greater, and in a section perpendicular to the central axis of rotation of the mandrel, the inclination of the outside of the mandrel changes continuously from the end of the short axis of the mandrel to the end of the long axis of the mandrel so that the mandrel is Constructed to have an elliptical structure, so as to reduce the loss from the major axis of the mandrel during the constant-speed rotation of the mandrel when the sheet-type stack is wound on the mandrel with its ends fitted i...

Claims

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Application Information

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IPC IPC(8): H01M10/04H01M10/052H01M4/04
CPCH01M10/02H01M10/0431H01M10/049H01M10/052H01M10/0587Y02E60/10Y02P70/50B65H18/04H01M10/0409
Inventor 郑在喆金学均金东明金纯焕余昌信
Owner LG ENERGY SOLUTION LTD