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Lithium ion battery and manufacturing method

A lithium-ion battery and battery technology, applied in secondary battery manufacturing, electrolyte battery manufacturing, secondary batteries, etc., to achieve the effect of improving discharge rate and other properties, and small pore size

Active Publication Date: 2021-12-07
DREAMWEAVER INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the rechargeable battery industry, emphasis is placed on battery fabrication methods that are effective in providing sufficient voltage soak and current to provide sufficient electron transport and electrolyte deposition; currently, no such methods have been developed. method

Method used

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  • Lithium ion battery and manufacturing method
  • Lithium ion battery and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] Dreamweaver Silver diaphragms were fabricated according to the method described in US Patent No. 8,936,878 (incorporated herein by reference). The example used in these trials was Dreamweaver Silver 25, which included: EFTec A-010-04 nanofibrillated polyacrylonitrile fibers, EFTec L-010-04 nanofibrillated cellulose fibers, and polyethylene terephthalate Alcohol ester fiber, which has a length of 5 mm and a linear density of 0.3 denier per filament. The properties of this separator are shown in Table 2 below.

[0082] Table 2

[0083] Basement Membrane Properties Units of measurement Dreamweaver Silver TM 25

Thickness (12.6psi) μm 27 Thickness (25psi) μm 26 Gurley (JIS) Second 80 porosity ％ 56％ Aperture μm 1.1 TD Shrinkage @160C ％ 0 MD Shrinkage @160C ％ 2 TD length Kgf / cm 2

175 MD length Kgf / cm 2

330 Young's modulus Kgf / cm 2

23000 melt integrity C 200 ...

experiment example

[0090] Experimental example: battery manufacturer A

[0091] Production LiFePO4 electrodes were obtained from two manufacturers and tested in single-layer pouch cells sandwiched between two sheets of Plexiglas for uniform stress. Electrical properties other than self-discharge are very consistent across batteries and are otherwise reported more completely.

[0092] A single-layer contact cell (pouch cell) is made in a dimension of 50mm x 50mm. Electrodes (matched anode and cathode pairs) were commercially available from Chinese battery manufacturers. Fill the cell with a Li-ion battery electrolyte comprising 1 mole of LiPF in a 4:3:3 volumetric mixture of ethylene carbonate, dimethyl carbonate, and diethyl carbonate 6 . The battery was sealed into shape, and the procedure in Table 3 and Test parameters for testing. Use the following procedure to complete the test on a Neware battery tester.

[0093] The battery fabrication method included separator drying, cell assembl...

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Abstract

The invention discloses a method for manufacturing a lithium ion battery. The method comprises the steps of: assembling a battery comprising an interior space including an anode, a cathode and a separator; filling the interior space of the battery with an electrolyte; connecting the anode and the cathode to a charging device ; charging the battery at a rate less than or equal to C / 6 until the battery reaches a voltage capacity; and charging the battery at a certain voltage for more than 6 hours. The present invention also covers methods with a voltage capacity greater than or equal to 3.4 volts. The invention also covers methods with voltages greater than 3.4 volts. The resulting cells contain an efficiently and properly formed solid electrolyte interfacial layer.

Description

technical field [0001] The present invention relates to a method of making a lithium-ion battery comprising an insulating (non-conducting) microporous polymer battery separator composed of a single layer of embedded microfibers and nanofibers. The overall fabrication method is efficient and produces a suitable solid electrolyte interface (SEI) layer on the anode of the battery. Methods of making the separator, methods of utilizing the separator in batteries, and methods of making a solid electrolyte interface layer are all encompassed by the present invention. Background technique [0002] Batteries have been used for electrical energy storage in remote locations and for portable applications for many years. Through the controllable movement of ions between the electrodes (anode and cathode), a power circuit is created, providing power that can be used until the excess ions in one electrode are depleted and no further power generation is possible. In recent years, recharge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/449H01M50/446H01M50/44H01M50/423H01M50/414H01M50/417H01M10/04H01M10/0525H01M50/42H01M50/429H01M50/489
CPCH01M10/049H01M10/0525H01M10/446H01M50/449H01M50/44H01M50/42H01M50/429H01M50/417H01M50/489Y02E60/10Y02P70/50H01M10/058H01M50/411
Inventor 布莱恩·G·莫兰
Owner DREAMWEAVER INT
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