A flexible lithium-ion battery

A lithium-ion battery, flexible technology, applied in the direction of batteries, battery electrodes, secondary batteries, etc., can solve the problems of low energy density, reduced consumer experience, etc., to reduce the breakage of pole pieces, easy bending, and strong adhesion Effect

Active Publication Date: 2019-02-26
APOWER ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most wearable electronic products have a certain shape or curvature, the shape of traditional lithium-ion batteries is fixed, and only the limited space of these electronic products can be used. Not only the energy density is low, but also in the process of repeated wearing, because the battery The shape cannot be bent, which will lead to a decline in consumer experience

Method used

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  • A flexible lithium-ion battery
  • A flexible lithium-ion battery
  • A flexible lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a flexible lithium-ion battery includes a battery cell and an outer packaging film 4 wrapped outside the battery cell, and a flexible film is arranged between the outer packaging film 4 and the upper surface and the lower surface of the battery cell.

[0027] Such as figure 1 As shown, the battery cell is formed by stacking positive electrode sheets 1, separators 2, and negative electrode sheets 3, and the number of positive and negative electrode sheets is determined according to the battery capacity and thickness. The positive electrode sheet 1 includes a positive electrode carrier fluid and a positive electrode material coated on the surface of the positive electrode carrier fluid. The positive electrode material is made of lithium cobaltate as the main material, mixed with a flexible PVDF binder and a conductive agent; the positive electrode electrode is made of For sheet 1, the materials are first mixed into a slurry, then evenly coated ...

Embodiment 2

[0037] Such as figure 1 As shown, a flexible lithium-ion battery includes a battery cell and an outer packaging film 4 wrapped outside the battery cell, and a flexible film 5 is provided between the outer packaging film 4 and the upper surface and the lower surface of the battery cell.

[0038] Such as figure 1 As shown, the cell is formed by stacking positive pole pieces 1, separators, and negative pole pieces 3, and the number of positive and negative pole pieces is determined according to the battery capacity and thickness. The positive electrode sheet 1 includes a positive electrode carrier and a positive electrode material coated on the surface of the positive electrode carrier. The positive electrode material is made of lithium nickel manganese cobaltate as the main material, mixed with a flexible PVDF binder and a conductive agent; For the positive electrode sheet 1, the materials are first mixed into a slurry, then uniformly coated on the surface of the aluminum foil,...

Embodiment 3

[0048] Such as figure 1 As shown, a flexible lithium-ion battery includes a battery cell and an outer packaging film 4 wrapped outside the battery cell, and a flexible film 5 is provided between the outer packaging film 4 and the upper surface and the lower surface of the battery cell.

[0049] Such as figure 1 As shown, the cell is formed by stacking positive pole pieces 1, separators, and negative pole pieces 3, and the number of positive and negative pole pieces is determined according to the battery capacity and thickness. The positive electrode sheet 1 includes a positive electrode carrier and a positive electrode material coated on the surface of the positive electrode carrier. The positive electrode material is made of lithium manganate as the main material, mixed with a flexible PVDF binder and a conductive agent; the positive electrode is made For sheet 1, the materials are first mixed into a slurry, then evenly coated on the surface of the aluminum foil, and punched...

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Abstract

A flexible lithium-ion battery, comprising an electric core and an outer packaging film wrapped outside the electric core; a flexible film is arranged between the outer packaging film and the upper surface and the lower surface of the electric core, and the flexible film covers the On the upper surface and the lower surface, at least one piece of flexible film and the outer packaging film are provided with several buffer protrusions, and the inner surface of the outer packaging film is provided with pits corresponding to the buffer protrusions. A buffer protrusion is added on the surface of the battery cell. The buffer protrusion has a certain degree of elasticity. When the battery as a whole is bent, it will be squeezed by the bending stress prior to the pole piece, thereby protecting the pole piece from powder shedding due to excessive stress. Fracture, increasing the number of times the battery is bent.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a flexible lithium ion battery. Background technique [0002] In recent years, the market of wearable electronic products is very hot, and the sales of products such as smart watches, smart bracelets, smart glasses, smart necklaces, and smart rings are increasing year by year. Since most wearable electronic products have a certain shape or curvature, the shape of traditional lithium-ion batteries is fixed, and only the limited space of these electronic products can be used. Not only the energy density is low, but also in the process of repeated wearing, because the battery The shape of the product cannot be bent, which will lead to a decline in the consumer experience. Therefore, the development of a flexible battery that can be bent repeatedly with the shape of wearable electronic products can not only increase the energy density of the battery and increase the use time, but also improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M4/62H01M10/0525
CPCH01M4/621H01M10/0525H01M10/058H01M2220/30Y02E60/10Y02P70/50
Inventor 余志陈俊涛王玉虎
Owner APOWER ELECTRONICS CO LTD
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