Pouch film, pouch-type battery case, and pouch-type secondary battery

A battery case and pouch-type technology, which is applied in the direction of lithium batteries, battery pack parts, battery boxes/coatings, etc., can solve problems such as limitations, reduced volumetric energy efficiency of secondary batteries, and reduced electrode assembly size, etc., to achieve Effect of improving tensile strength and elongation

Pending Publication Date: 2021-12-10
LG ENERGY SOLUTION LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a limit to molding a cup with a deeper depth in the bag film, and there is also a limit to reducing the radius of the fillet when applying a fillet to the edge of the bottom of the cup and the edge of the opening.
In addition, molding the outer wall of the cup-shaped portion arranged in a near-vertical state is also limited.
As a result, the dead space of the secondary battery will increase, and the size of the electrode assembly will decrease, resulting in a decrease in energy efficiency relative to the volume of the secondary battery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pouch film, pouch-type battery case, and pouch-type secondary battery
  • Pouch film, pouch-type battery case, and pouch-type secondary battery
  • Pouch film, pouch-type battery case, and pouch-type secondary battery

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0086]A nylon resin with a width of 266 cm, a length of 50 m, and a thickness of 25 μm and a polyethylene terephthalate (PET) with a width of 266 cm, a length of 50 m, and a thickness of 12 μm were sequentially laminated on a surface with a width of 266 cm and a length of 266 cm. 50m, 60μm thick on one surface of AA8021 aluminum (Al) alloy, and laminated cast polypropylene (CPP) with a width of 266cm, length 50m, and 80μm thickness on the other surface of AA8021 aluminum (Al) alloy On the surface.

[0087] In this paper, nylon and aluminum (Al) alloys were bonded to each other by dry lamination using conventional polyurethane adhesives, and cast polypropylene (CPP), which has excellent electrolyte resistance, was melted at high temperature, and then This was coextruded and laminated on an aluminum (Al) alloy to manufacture a bag film according to a production example of the present invention. In this paper, aluminum (Al) alloy forms the gas barrier layer, PET forms the surfac...

manufacture example 2

[0089] A bag film was produced in the same manner as in Production Example 1, except that the nylon resin had a thickness of 30 μm and the polyethylene terephthalate (PET) had a thickness of 7 μm. According to Production Example 2, the thickness ratio of the stretching auxiliary layer to the gas barrier layer was 1:2.

manufacture example 3

[0091] A bag film was produced in the same manner as in Production Example 1, except that the nylon resin had a thickness of 25 μm and the polyethylene terephthalate (PET) had a thickness of 7 μm. According to Production Example 3, the thickness ratio of the stretching auxiliary layer to the gas barrier layer was 1:2.4.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Grain sizeaaaaaaaaaa
Login to view more

Abstract

A pouch film for manufacturing a pouch-type battery case accommodating an electrode assembly according to an embodiment of the present invention for solving the above-mentioned problems includes: a sealant layer made from the first polymer and formed as the innermost layer; a surface protective layer made from the second polymer and formed as the outermost layer; and a gas barrier layer made of a metal containing an AA80XX-based aluminum alloy and laminated between the surface protective layer and the sealing layer. The thickness of the gas barrier layer is 50 [mu]m to 70 [mu]m and the thickness of the sealing layer is 70 [mu]m to 100 [mu]m.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority of Korean Patent Application No. 10-2020-0069917 filed on June 9, 2020, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a pouch film, a pouch-type battery case, and a pouch-type secondary battery, and more particularly, to a pouch film, a pouch having improved tensile strength and elongation to improve moldability type battery case and pouch type secondary battery. Background technique [0004] Generally, secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, and lithium-ion polymer batteries. Such secondary batteries are being applied and used in small products such as digital cameras, P-DVD, MP3P, mobile phones, PDAs, portable game devices, electric tools, electric bicycles, etc., as well as in electric vehicles and hybrid vehicles, f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M50/105H01M50/119H01M50/121H01M50/126H01M50/133H01M10/052B32B27/36B32B27/34B32B27/32B32B27/08B32B15/20B32B15/088B32B15/085
CPCH01M50/105H01M50/119H01M50/121H01M50/126H01M50/133H01M10/052B32B27/36B32B27/34B32B27/32B32B27/08B32B15/20B32B15/088B32B15/085B32B2307/51B32B2307/558B32B2307/7242B32B2457/10H01M50/116H01M50/124Y02E60/10B32B2307/54B32B2439/40B32B2307/7246B32B2307/732B32B7/02H01M50/10H01M50/141H01M50/131H01M50/557H01M50/129B32B15/09B32B2323/10B32B2367/00B32B2377/00B32B7/12B32B2553/00
Inventor 金橡熏姜旻亨庾亨均黄隨枝
Owner LG ENERGY SOLUTION LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap