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Secondary battery and secondary battery manufacturing method

A secondary battery and electrode technology, which is applied in secondary battery manufacturing, secondary batteries, cylindrical case batteries/batteries, etc., can solve the problems of battery capacity reduction, improve safety, ensure welding processing performance, and prevent mutual The effect of contact

Active Publication Date: 2019-11-19
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in order to attach the intermediate tab according to the characteristics of the jelly roll, it is necessary to form an uncoated portion on a predetermined portion in the middle of the electrode
Thus, there is a problem that the battery capacity decreases due to the increase of the uncoated portion

Method used

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Embodiment Construction

[0055] Hereinafter, a secondary battery and a method of manufacturing the same according to exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0056] Terms or words used in the specification and claims should not be construed as limited to the dictionary meanings, but should be understood by the inventor based on his / her ability to define the terms in order to best describe his / her invention as seen by others for the appropriate concept. Therefore, the embodiments and drawings described herein are illustrative only and not exhaustive, and it will be understood that various equivalents may be made in place of the embodiments.

[0057] In the drawings, the size of each component or a specific part of a constituent component is exaggerated, omitted, or schematically shown for convenience of description and clarity. Thus, the size of each element does not reflect an actual size as a whole. Also, detailed desc...

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Abstract

The present invention relates to a secondary battery and a secondary battery manufacturing method, wherein the mechanical strength of an electrode tab can be increased. In addition, the present invention is characterized by comprising: an electrode having a coated portion and a non-coated portion provided along the longitudinal direction of an electrode collector, the coated portion having an active material applied onto the electrode collector, and the non-coated portion having no active material applied onto the electrode collector; and a notching tab portion extending from the coated portion in the transverse direction of the electrode collector such that the active material is not applied thereto, the notching tab portion being formed to overlap in at least two tiers when the electrodeis wound.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority of Korean Patent Application No. 10-2017-0048645 filed on April 14, 2017 and Korean Patent Application No. 10-2018-0043191 filed on April 13, 2018, by reference The entire contents of these patent applications are incorporated herein. technical field [0003] The present invention relates to a secondary battery and a method of manufacturing the same, and more particularly, to a secondary battery in which mechanical strength of an electrode tab is increased and a method of manufacturing the same. Background technique [0004] According to the living environment surrounded by various electrical and electronic devices, when AC power supplied to buildings cannot be obtained, or when DC power is required, batteries (cells) that generate electrical energy through physical or chemical reactions to supply the generated electrical energy to the outside are us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M10/04H01M10/0587H01M4/04H01M4/13H01M4/139H01M50/536H01M50/538
CPCH01M10/0422H01M10/0587H01M10/4235Y02E60/10H01M50/538Y02P70/50H01M50/536H01M10/0431
Inventor 金在雄金炯权金尙旭
Owner LG ENERGY SOLUTION LTD
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