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Pouch-type battery case and pouch-type secondary battery

A battery case, bag-type technology, applied in battery pack parts, battery box/jacket, battery box/cover material, etc., can solve the problem of reducing the energy efficiency of secondary batteries, increasing the dead space of secondary batteries, and the size of electrode assemblies. Reduce problems such as excellent puncture strength, improve moldability, increase tensile strength and elongation

Pending Publication Date: 2021-10-22
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 (Dead Space) of the secondary battery may increase, and the size of the electrode assembly may decrease, thereby reducing the energy efficiency with respect to the volume of the secondary battery

Method used

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  • Pouch-type battery case and pouch-type secondary battery
  • Pouch-type battery case and pouch-type secondary battery
  • Pouch-type battery case and pouch-type secondary battery

Examples

Experimental program
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manufacture example

[0082] 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. AA8021 aluminum (Al) alloy with a width of 266 cm, a length of 50 m, and a thickness of 60 μm was laminated on the other surface of AA8021 aluminum (Al) alloy. On the surface.

[0083] Here, nylon and aluminum (Al) alloys are bonded to each other by dry lamination by using a conventional polyurethane (Urethane) adhesive, and cast polypropylene (CPP) with excellent electrolyte resistance is Melted under, then co-extruded and laminated on an aluminum (Al) alloy to produce a bag film according to a production example of the present invention. Here, aluminum (Al) alloy forms the gas barrier layer, PET forms the surface protection layer, nylon forms the tensile auxiliary layer, and CPP forms the sealing ...

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Abstract

The present invention relates to a pouch-type battery case comprising a pouch film laminate including a sealant layer, a gas barrier layer, and a surface protective layer. The sealant layer is formed of a first polymer and is formed on the innermost layer, and the surface protective layer is formed of a second polymer and is formed on the outermost layer. The gas barrier layer is disposed between the surface protective layer and the sealant layer, and is formed of an aluminum alloy thin film having a thickness of 60 [mu]m to 100 [mu]m and a grain size of 10 [mu]m to 13 [mu]m.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority from Korean Patent Application No. 10-2020-0045542 filed on April 14, 2020, which is hereby incorporated by reference in its entirety. [0003] The present invention relates to a pouch-type battery case and a pouch-type secondary battery, and more particularly, to a pouch-type battery case and a pouch-type secondary battery in which tensile strength and elongation are increased to improve moldability. Background technique [0004] In general, secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, and lithium-ion polymer batteries. Such secondary batteries have been applied to devices such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDAs, portable game devices (Portable Game Devices), electric tools (Power Tools), electric bicycles (E-bikes), and the like. Small products as well as large products r...

Claims

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Application Information

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IPC IPC(8): H01M50/105H01M50/129
CPCH01M50/105H01M50/129Y02E60/10H01M50/119H01M50/121H01M50/133H01M50/124B32B15/20B32B15/08B32B15/085B32B15/088B32B2457/10B32B27/08B32B27/32B32B27/34H01M50/46
Inventor 金橡熏黃隨枝姜旻亨庾亨均
Owner LG ENERGY SOLUTION LTD
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