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Flexible battery manufacturing method

A flexible battery and electrode technology, which is applied in the manufacture of secondary batteries, batteries, electrolyte storage batteries, etc.

Pending Publication Date: 2020-12-25
AMOGREENTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, batteries currently commercially available or under development have a problem in that, since the electrode assembly included in the battery is not completely immersed in the electrolyte solution, spots are generated on the surface of the cathode filled with the electrolyte solution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] like figure 1 As shown, as a method for preparing a flexible battery in which an electrode assembly and an electrolyte are sealed together by an external material, the method for preparing a flexible battery according to an embodiment of the present invention includes: an injection process S1, adding The opening of the material is injected with an electrolyte solution; the immersion step S2 is to immerse the electrode assembly in the electrolyte solution according to the pressure change inside the external material; and the sealing step S3 is to seal the opening.

[0036] The above impregnation process takes the following steps as a cycle to perform the decompression and pressurization process, including: step (1) S2-1, decompressing the interior of the external material through the injected electrolyte; step (2) S2-2, Maintain the pressure after decompression within a specified time; and step (3) S2-3, restore the internal pressure of the external material to 700-780 T...

Embodiment 1

[0082] First, prepare a metal layer made of aluminum with a thickness of 30 μm, form a first resin layer made of cast polypropylene (CPP, casting polypropylene) with a thickness of 40 μm on one side of the metal layer, and form a resin layer on the other side of the metal layer. A second resin layer consisting of a nylon film having a thickness of 10 μm, in this case, an acid-modified polypropylene layer of 5 μm having an acrylic acid content of 6% by weight in the copolymer is provided on the above-mentioned first resin layer and An external material with a total thickness of 85 μm was prepared between the metal layers.

[0083] Next, in order to prepare an electrode assembly, first, an anode assembly and a cathode assembly were prepared. The anode assembly was prepared by casting lithium nickel cobalt manganese (NCM, Lithium Nickel Cobalt) on both sides of the anode current collector on an anode current collector made of aluminum with a thickness of 20 μm so that the final t...

Embodiment 2～ Embodiment 15 and comparative example 1

[0086] In addition to changing the number of cycles in the depressurization process, the number of execution times of the depressurization process, the pressure relative to the previous depressurization process, and the final depressurization pressure relative to the initial pressure, etc. in the manner shown in Table 1 to Table 3 , a flexible battery was prepared in the same manner as in Example 1 above.

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Abstract

A flexible battery manufacturing method is provided. A flexible battery manufacturing method according to an embodiment of the present invention comprises: an injection step of injecting an electrolyte into an opening of a sheath material having an electrode assembly contained therein; an impregnation step of impregnating the electrode assembly with the electrolyte through a change in the pressureinside the sheath material; and a sealing step of sealing the opening. In the impregnation step, a pressure increasing / decreasing process is performed, wherein one cycle of the pressure increasing / decreasing process comprises the steps of: (1) decreasing the pressure inside the sheath material through the injected electrolyte; (2) maintaining the decreased pressure for a predetermined period of time; and (3) restoring the pressure inside the sheath material to 700-780Torr. Accordingly, the flexible battery manufacturing method according to the present invention is advantageous in that, sincethe electrode assembly provided in the battery can be fully impregnated with the electrolyte, no spot occurs on the surface of the negative electrode filled with the electrolyte. In addition, a flexible battery manufactured by the flexible battery manufacturing method according to the present invention can prevent or minimize degradation of physical characteristics that the battery is required toexhibit, even if repeated bending occurs.

Description

technical field [0001] The invention relates to a preparation method of a flexible battery. Background technique [0002] As consumer demand shifts to digitization and high-performance electronic products, market demand is gradually changing, and shifts to power supply devices that are thinner, lighter, and have higher capacity due to higher energy density. [0003] In order to meet this consumer demand, lithium-ion secondary batteries with high energy density and large capacity, lithium-ion polymer batteries, supercapacitors (Electric double layer capacitors (Electric double layer capacitor)) and Faraday quasi-capacitors are being developed; (Pseudo capacitor) 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 recent adoption of roll-up displays, flexible e-paper, flexible liquid crystal displays, Flexible mobile electronic d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/0585H01M2/02H01M50/105
CPCY02E60/10Y02P70/50H01M10/0436H01M10/052H01M10/058H01M50/105H01M50/128H01M50/136H01M50/618H01M10/0585H01M10/049H01M50/116H01M2220/30H01M10/0525
Inventor 赵炫友张朱希
Owner AMOGREENTECH CO LTD