Fast-charging high-power winding column type lithium ion battery

A lithium-ion battery, high-power technology, applied in the electronic field, can solve the problems of low power output density, not supporting fast charging, etc., and achieve the effects of ensuring safety, optimizing interface performance, and improving migration speed

Inactive Publication Date: 2011-08-17
贵州航天电源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ordinary cylindrical lithium-ion batteries can only be discharged with a small current, basically do not support fast charging, and have a low power output density

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Fast-charging high-power wound cylindrical lithium-ion battery, including positive pole pieces, negative pole pieces, porous separators, which are sequentially wound into a cylindrical core, and a metal shell is placed outside the core, and the electrolyte is injected into the metal shell , wherein: the positive electrode material is lithium cobalt oxide (LiCoO 2 ), the negative electrode material is graphite, the weight ratio of lithium titanate is 7:3, the binder is polyvinylidene fluoride (PVDF) with a molecular weight of 300,000 to 1 million, and the conductive agent is conductive carbon black.

[0017] The weight ratio of positive electrode material: binder: conductive agent in the positive electrode mixture is 8:1:1.

[0018] The weight ratio of negative electrode material: binder: conductive agent in the negative electrode mixture is 80: 12: 8.

[0019] The positive current collector is a pretreated aluminum foil with a thickness of 8 microns; the negative curre...

Embodiment 2

[0023] Fast-charging high-power wound cylindrical lithium-ion battery, including positive pole pieces, negative pole pieces, porous separators, which are sequentially wound into a cylindrical core, and a metal shell is placed outside the core, and the electrolyte is injected into the metal shell , characterized in that: the positive electrode material is lithium cobaltate (LiCoO 2 ), lithium manganate ( LiMn 2 o 4 ), the weight ratio of lithium vanadate is 4:5:1; the negative electrode material is graphite, and the weight ratio of lithium titanate is 7:3; the binder is polyvinylidene fluoride (PVDF) with a molecular weight of 300,000 to 1 million; carbon black.

[0024] The weight ratio of positive electrode material: binder: conductive agent in the positive electrode mixture is 80:12:8.

[0025] The weight ratio of negative electrode material: binder: conductive agent in the negative electrode mixture is 80:12:8.

[0026] The positive current collector is pretreated alumi...

Embodiment 3

[0031] Fast-charging high-power wound cylindrical lithium-ion battery, including positive pole pieces, negative pole pieces, porous separators, which are sequentially wound into a cylindrical core, and a metal shell is placed outside the core, and the electrolyte is injected into the metal shell , characterized in that: the positive electrode material is lithium nickel cobalt aluminate (LiCoO 2 ), three-element material (LiCoxNiyMnzO 2 ), the weight ratio of lithium iron phosphate is 4:5:1; the negative electrode material is graphite, and the weight ratio of lithium titanate is 7:3; the binder is polyvinylidene fluoride (PVDF) with a molecular weight of 300,000 to 1 million; Conductive carbon black.

[0032] The positive electrode material: binder: conductive agent weight ratio in the positive electrode mixture is 80:12:8.

[0033] The negative electrode material in the negative electrode mixture: binder: conductive agent weight ratio is: 80:12:8

[0034] The positive curre...

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Abstract

The invention discloses a fast-charging high-power winding column type lithium ion battery which comprises a positive pole piece, a negative pole piece and a porous isolating membrane, the positive pole piece, the negative pole piece and the porous isolating membrane are wound into a column type core body in sequence, a metal case is sheathed outside the core body, and an electrolytic liquid is injected into the metal case. The fast-charging high-power winding column type lithium ion battery is characterized in that a positive pole material is one or more than one of lithium cobalt oxide, lithium manganese oxide, three-element material, aluminum-doped nickel cobalt lithium, lithium iron phosphate and lithium vanadate; a negative pole material is one or more than one of graphite and lithium titanate. The positive current collector is a pretreated aluminum foil or aluminum mesh with the thickness of 8-30 micrometers; and the negative current collector is a copper foil, a copper mesh, a nickel-plated iron foil or a nickel-plated iron mesh with the thickness of 8-30 micrometers. An electrolyte in the electrolytic liquid is one or a mixture of lithium hexafluorophosphate and biethyl diacid lithium borate; and a solvent in the electrolytic liquid is a mixture of two or more than two of EC (Ethylene Carbonate), PC (Propylene Carbonate), DMC (Dimethyl Carbonate), DEC (Diethyl Carbonate), EA (Ethyl Acetate) and the like. In the invention, not only can high-power output of the battery be realized, but also the fast charging of the battery can be realized, and safety performance is high.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a battery. Background technique [0002] As lithium batteries are more and more widely used in various fields of life, conventional lithium batteries are one of the materials such as lithium cobalt oxide and lithium manganate coated on the positive electrode electrolytic aluminum foil, and the negative electrode is coated on the surface of copper foil. A layer of graphite, and the electrolyte of the electrolyte is lithium hexafluorophosphate. [0003] Compared with traditional lead-acid, nickel metal hydride, nickel cadmium and other batteries, cylindrical lithium-ion batteries have the characteristics of light weight, small volume, high energy density, small self-discharge, no memory effect, and environmental friendliness. They are widely used in portable equipment, communication Electrical appliances, toys, electric tools, energy storage and other fields. [0004] Ordinar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/13H01M10/0568H01M2/02H01M2/12
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 杨波杨廷明孟令忠
Owner 贵州航天电源科技有限公司
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