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Flexible battery, manufacturing method therefor, and auxiliary battery comprising same

A flexible battery and electrode technology, applied in the manufacture of small flat batteries/batteries, battery electrodes, secondary batteries, etc., can solve problems such as explosion, ignition, and performance drop compared to the initial design value, to prevent cracks and prevent capacity reduction. Effect

Pending Publication Date: 2020-11-27
AMOGREENTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if pouch batteries that are currently commercially available or under development are repeatedly bent during use, the following problems will arise, that is, the external material and electrode assembly may be damaged due to repeated shrinkage and expansion. Performance drops to a considerable level from the original design value, thus limiting the function of the battery, damage or low melting point can cause fire and / or explosion when the cathode and anode are in contact, and it is difficult to achieve ion exchange of the electrolyte inside the battery

Method used

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  • Flexible battery, manufacturing method therefor, and auxiliary battery comprising same
  • Flexible battery, manufacturing method therefor, and auxiliary battery comprising same
  • Flexible battery, manufacturing method therefor, and auxiliary battery comprising same

Examples

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preparation example Construction

[0049] Such as figure 1 As shown, a flexible battery according to an embodiment of the present invention includes an electrode assembly, and the preparation method of the electrode assembly includes: forming a composition by treating a part or all of an active material on at least one side of an anode current collector and a cathode current collector, respectively A step of preparing an anode and a cathode; and a step of laminating by placing a separation membrane between the anode and the cathode.

[0050] Specifically, the preparation method of the above-mentioned electrode assembly includes: forming an anode composite material by applying an anode active material forming composition to a part or all of at least one surface of the anode current collector and drying; A step of vacuum drying a part or all of the anode current collector of the anode composite material to prepare an anode having an anode active material; the composition is formed by coating a part or all of the cath...

Embodiment approach

[0174] Hereinafter, the present invention will be further described in detail through the following examples, but the following examples do not limit the scope of the present invention, and should be interpreted as helpful to the understanding of the present invention.

Embodiment

[0176] First, a metal layer made of aluminum with a thickness of 30μm is prepared, and a first resin layer composed of cast polypropylene (CPP) with a thickness of 40μm is formed on one side of the metal layer, and formed on the other side of the metal layer A second resin layer composed of a nylon film with a thickness of 10 μm. In this case, a 5 μm acid-modified polypropylene layer with an acrylic acid content of 6 weight percent in the copolymer is placed on the first resin layer and An external material with a total thickness of 85 μm was prepared between the metal layers.

[0177] Next, in order to prepare the electrode assembly, first, an anode and a cathode are prepared. The anode was prepared by a method of applying an anode active material forming composition to both sides of the anode current collector with a thickness of 50 μm on an aluminum anode current collector with a thickness of 20 μm, and relative to 100 parts by weight As the anode material, lithium nickel cob...

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Abstract

A flexible battery is provided. A method for manufacturing a flexible battery in which an electrode assembly is encapsulated together with an electrolyte by an exterior material, according to one embodiment of the present invention, comprises the steps of: forming a cathode mixture by coating and drying a cathode active material forming composition on a portion or all of at least one surface of acathode current collector; preparing a cathode by vacuum-drying the cathode current collector; forming an anode mixture by coating and drying an anode active material forming composition on a portionor all of at least one surface of the anode current collector; preparing an anode by vacuum-drying the anode current collector; and stacking the cathode and the anode with a separator interposed therebetween. Due to these features, as a spring back phenomenon is suppressed, cracks and / or peeling of an active material do not occur when patterns are formed, such that there is an effect that performance degradation due to capacity reduction, resistance increase, internal short circuit, etc. does not occur. In addition, as a predetermined pattern is formed, cracks may be prevented even when bending occurs, and deterioration of physical properties required as a battery can be prevented or minimized even when bending occurs repeatedly. As such, the flexible battery of the present invention can be applied to various electronic devices requiring flexibility of a battery, such as wearable devices such as smart watches and watch bands, as well as rollable displays.

Description

Technical field [0001] The present invention relates to a flexible battery, a preparation method thereof, and an auxiliary battery including the flexible battery. Background technique [0002] As consumer demand shifts to the digitization and high performance of electronic products, market demand has gradually changed, turning to thinner, lighter, and high-capacity power supply devices due to high energy density. [0003] In order to meet this consumer demand, high-energy density and large-capacity lithium-ion secondary batteries, lithium-ion polymer batteries, supercapacitors (Electric double layer capacitors), and Faraday capacitors (Pseudo capacitors) are being developed. ) And other power supply devices. [0004] Recently, as the demand for mobile electronic devices such as mobile phones, notebook computers, and digital cameras continues to increase, in particular, the use of roll-up displays, flexible e-papers, and flexible liquid crystal displays (flexible liquid crystal displ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/0585H01M4/04H01M4/62H01M2/02H01M2/10H01M10/46H01M50/105
CPCY02E60/10H01M4/0404H01M4/0471H01M4/623H01M4/625H01M10/0436H01M2220/30Y02P70/50H01M50/105H01M10/0585H01M50/116H01M10/46H01M50/136H01M50/211H01M50/238H01M4/133H01M4/1393H01M2004/027H01M2004/028
Inventor 赵炫友张朱希
Owner AMOGREENTECH CO LTD