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Secondary battery and manufacturing method therefor

A secondary battery and electrode technology, which is applied in secondary battery manufacturing, secondary battery, electrode manufacturing, etc., can solve the problem of difficulty in redesigning electrodes, and achieve the effect of improving charging rate, improving charging performance, and increasing charging rate.

Active Publication Date: 2020-05-22
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the electrodes must include current collectors
Therefore, there is a problem that it is difficult to redesign electrodes with novel structures

Method used

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  • Secondary battery and manufacturing method therefor
  • Secondary battery and manufacturing method therefor
  • Secondary battery and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

experiment example

[0064] As an experimental example, image 3 It is a result showing the resistance increase rate of each of the positive electrode and the negative electrode as the secondary battery deteriorates. It can be seen that when measuring image 3 For the size of the semicircle (or curve) in (a), the resistance of the positive electrode before deterioration is 110 ohm. Furthermore, it can be seen that when measuring image 3 For the size of the semicircle (or curve) in (a), the resistance of the positive electrode after deterioration is 60 ohm. It can be seen that the resistance of the positive electrode decreases after deterioration.

[0065] It can be seen that when measuring image 3 For the size of the semicircle (or curve) in (b), the resistance of the negative electrode before deterioration is 10 ohm. Furthermore, it can be seen that when measuring image 3 For the size of the semicircle (or curve) in (b), the resistance of the negative electrode after degradation is 13 oh...

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PUM

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Abstract

The present invention relates to a secondary battery comprising an electrode assembly, the electrode assembly comprising: a first unit electrode formed by connecting a plurality of first electrodes formed entirely of a first electrode mixture in solid form; a second unit electrode formed by connecting a plurality of second electrodes formed entirely of a second electrode mixture in solid form; a separation film interposed between the first unit electrode and the second unit electrode; and an electrode tab equipped with a plurality of first electrode tabs provided in the first unit electrode and with a plurality of second electrode tabs provided in the second unit electrode.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority from Korean Patent Application No. 10-2018-0079285 filed on July 9, 2018, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a secondary battery and a manufacturing method thereof, and more particularly to a secondary battery including a unit electrode having a new structure and a manufacturing method thereof. Background technique [0004] Generally, a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged. Secondary batteries are widely used in the fields of small and advanced electronic equipment, such as mobile phones, PDAs, and notebook computers. [0005] Such a secondary battery includes an electrode assembly, an electrode lead connected to the electrode assembly, and a pouch for accommodating the electrode assembly with the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/0585H01M2/26H01M10/42H01M2/34H01M4/02H01M4/13H01M4/04H01M4/139H01M10/44H01M50/531
CPCH01M4/02H01M4/13H01M4/04H01M10/04H01M4/139H01M10/0585Y02E60/10H01M2010/4271H01M10/446H01M10/4207H01M10/441H01M50/531Y02P70/50H01M10/0436H01M10/425H01M4/043H01M50/54H01M50/572H01M4/62H01M4/364
Inventor 金大洙金荣德韩松伊
Owner LG ENERGY SOLUTION LTD