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Preparation method of flexible battery pack and prepared flexible battery pack

A flexible battery pack, single cell technology, applied in the manufacture of alkaline batteries, small flat batteries/batteries, alkaline batteries, etc., can solve the problem of increased battery internal resistance, positive and negative short-circuit safety, and battery performance degradation and other problems, to achieve the effect of high compressive strength and tensile strength, dielectric constant withstand voltage, and high dielectric constant

Inactive Publication Date: 2020-09-11
SHENZHEN XINDA NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the flexible batteries in the prior art have the following disadvantages: 1. The capacity of the battery is generally below 100mAh due to the size limitation; 2. The performance of the battery will decay after repeated bending and folding, and the contact between the positive and negative materials of the battery will become weak after folding. 3. It will cause safety problems. Since the positive and negative materials of the battery are coated on the metal foil, the positive and negative electrodes of the battery will be bent and folded many times. The electrode material will fall off from the copper foil or aluminum foil, piercing the separator and causing a short circuit of the battery, which will cause safety problems; 4. The separator of the battery is a porous organic matter. After the battery is bent and folded many times, the separator may be damaged, resulting in positive and negative electrodes. Contact short circuit creates safety issues

Method used

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  • Preparation method of flexible battery pack and prepared flexible battery pack
  • Preparation method of flexible battery pack and prepared flexible battery pack
  • Preparation method of flexible battery pack and prepared flexible battery pack

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0051] A method for preparing a flexible battery pack, comprising the following steps:

[0052] (1) In an argon-protected glove box, use lithium cobaltate as the positive electrode active material, and use a coating machine to coat or spray the positive electrode sheet on aluminum foil, and use artificial graphite as the negative electrode active material, and use a coating machine to coat Cloth or spray on the copper foil to make the negative electrode sheet, the side coated with the positive electrode active material faces the separator, and the side coated with the negative electrode active material faces the separator, and the positive electrode sheet, separator and negative electrode sheet are wound or stacked Process to prepare winding core or stacked core. When winding and forming, the positive electrode sheet, separator and negative electrode sheet are stacked in sequence and then wound. The positive electrode sheet is in the inner layer and the negative electrode sheet...

Embodiment 2

[0060] A method for preparing a flexible battery pack, comprising the following steps:

[0061] (1) In an argon-protected glove box, use lithium iron phosphate as the positive electrode active material, and use a coating machine to coat or spray on aluminum foil to make a positive electrode sheet, and use artificial graphite as the negative electrode active material, and use a coating machine to coat Cloth or spray on the copper foil to make the negative electrode sheet, the side coated with the positive electrode active material faces the separator, and the side coated with the negative electrode active material faces the separator, and the positive electrode sheet, separator and negative electrode sheet are wound or stacked Process to prepare winding core or stacked core. When winding and forming, the positive electrode sheet, separator and negative electrode sheet are stacked in sequence and then wound. The positive electrode sheet is in the inner layer and the negative elec...

Embodiment 3

[0069] A method for preparing a flexible battery pack, comprising the following steps:

[0070] (1) In an argon-protected glove box, use the ternary material NCM523 as the positive electrode active material, and use a coating machine to coat or spray the positive electrode sheet on aluminum foil, and use artificial graphite as the negative electrode active material. Coating or spraying on the copper foil to make the negative electrode sheet, the side coated with the positive electrode active material faces the separator, and the side coated with the negative electrode active material faces the separator, and the positive electrode sheet, the separator and the negative electrode sheet are wound or stacked The core or laminated core is prepared by sheet technology. When winding and forming, the positive electrode sheet, separator and negative electrode sheet are stacked in sequence and then wound. The positive electrode sheet is in the inner layer and the negative electrode sheet...

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Abstract

The invention discloses a preparation method of a flexible battery, and relates to the technical field of lithium batteries. The preparation method comprises the following steps: (1), carrying out first packaging on a roll core or a laminated core by adopting an aluminum-plastic film, injecting an electrolyte, and carrying out second packaging after formation; (2), preparing a battery pack: arranging the single battery cells injected with the electrolyte in series or in parallel, setting the number of the single battery cells to be more than two, and arranging the adjacent single battery cellsat intervals; and (3), putting the battery pack in the (2) into a mold, then injecting a precursor of an encapsulant, and after the precursor is polymerized at normal temperature, obtaining a flexible battery pack. The invention provides the flexible battery pack prepared by the preparation method. The preparation method has the beneficial effects that by virtue of the preparation method disclosed by the invention, the adjacent single battery cells are arranged at intervals, and the gaps between the adjacent single battery cells are filled with the packaging agent, so that the stress generated by the battery during repeated bending and folding can be effectively released, and the performance of the flexible battery pack after bending is prevented from being attenuated.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for preparing a flexible battery pack and the prepared flexible battery pack. Background technique [0002] With the development of society, electronic components play an increasingly important role in human life, among which portable electronic components bring great convenience to people's life. With the development of portable electronic components, such as portable smart watches, electronic tags, sports fitness components and medical health equipment, etc., the emergence of flexible and bendable energy storage devices is becoming more and more urgent. [0003] Lithium batteries currently on the market are generally packaged in four packaging methods: cylindrical, square, button and soft. Among them, cylindrical, square, and button batteries are not flexible, and pouch batteries have certain flexibility under certain conditions (pouch batteries with a thickness les...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/058H01M10/0585H01M10/0587H01M10/28H01M10/30H01M6/06H01M6/10
CPCH01M10/04H01M10/0431H01M10/0436H01M10/058H01M10/0585H01M10/0587H01M10/28H01M10/286H01M10/287H01M10/30H01M6/06H01M6/10Y02E60/10Y02P70/50
Inventor 廖栋梁毛彦勇李开帝
Owner SHENZHEN XINDA NEW ENERGY TECH CO LTD
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