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Quick-charging type lithium titanate power battery

A fast-charging lithium titanate and power battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of fast charging stability and poor safety performance, and achieve improved high-temperature cycle performance, high-speed charging and discharging Effects of performance and high safety performance

Inactive Publication Date: 2018-02-09
WANXIANG 123 CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fast-charging lithium titanate battery with high cycle stability and safety in order to solve the problem that graphite material is used for the negative electrode of the existing lithium-ion battery, and the fast-charging stability and safety performance are poor.

Method used

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  • Quick-charging type lithium titanate power battery

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Embodiment 1

[0024] A fast-charging lithium titanate power battery is composed of a positive electrode sheet, a negative electrode sheet, a diaphragm, an electrolyte, and an outer package, wherein the positive electrode sheet and the negative electrode sheet are respectively composed of a positive current collector, a negative current collector, and a positive current collector, The positive electrode material and negative electrode material on the negative electrode current collector are composed of positive electrode material and negative electrode material respectively including positive electrode active material, negative electrode active material, auxiliary agent, conductive agent and binder, and the positive electrode active material is LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , the negative electrode active material is lithium titanate, and the auxiliary agent is a mixture of poly-3,4-ethylenedioxythiophene, titanium carbide and polyaniline-coated indium oxide. The mass ratio of poly-3,4-ethyle...

Embodiment 2

[0030] A fast-charging lithium titanate power battery is composed of a positive electrode sheet, a negative electrode sheet, a diaphragm, an electrolyte, and an outer package, wherein the positive electrode sheet and the negative electrode sheet are respectively composed of a positive current collector, a negative current collector, and a positive current collector, The positive electrode material and negative electrode material on the negative electrode current collector are composed of positive electrode material and negative electrode material respectively including positive electrode active material, negative electrode active material, auxiliary agent, conductive agent and binder, and the positive electrode active material is LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , the negative electrode active material is lithium titanate, and the auxiliary agent is a mixture of poly-3,4-ethylenedioxythiophene, titanium carbide and polyaniline-coated indium oxide. The mass ratio of poly-3,4-ethyle...

Embodiment 3

[0035] A fast-charging lithium titanate power battery is composed of a positive electrode sheet, a negative electrode sheet, a diaphragm, an electrolyte, and an outer package, wherein the positive electrode sheet and the negative electrode sheet are respectively composed of a positive current collector, a negative current collector, and a positive current collector, The positive electrode material and negative electrode material on the negative electrode current collector are composed of positive electrode material and negative electrode material respectively including positive electrode active material, negative electrode active material, auxiliary agent, conductive agent and binder, and the positive electrode active material is LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , the negative electrode active material is lithium titanate, and the auxiliary agent is a mixture of poly-3,4-ethylenedioxythiophene, titanium carbide and polyaniline-coated indium oxide. The mass ratio of poly-3,4-ethyle...

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Abstract

The invention discloses a quick-charging type lithium titanate power battery. The lithium ion battery consists of a positive electrode, a negative electrode, a diaphragm, an electrolyte and an external packaging part; the positive electrode plate consists of a positive electrode current collector and a positive electrode material coated on the positive electrode current collector; the negative electrode plate consists of a negative electrode current collector and a negative electrode material coated on the negative electrode current collector; the positive electrode material comprises a positive electrode active material, a conductive agent and a binder; the negative electrode material comprises a negative electrode active material, a conductive agent and a binder; the positive electrode active material is LiNi<1 / 3>Co<1 / 3>Mn<1 / 3>O<2>; the negative electrode active material is a lithium titanate material; the ratio of the negative electrode capacity to the positive electrode capacity is0.7-0.9; and the negative electrode current collector is carbon-coated aluminum foil. By virtue of the quick-charging type lithium titanate power battery, the adhesive property and the conductivity of the negative electrode plate can be improved, so that the high-current charging-discharging characteristic of the battery is improved effectively.

Description

technical field [0001] The invention relates to the field of lithium-ion power batteries, in particular to a fast-charging lithium titanate battery with high cycle stability and safety. Background technique [0002] At present, in the field of new energy, lithium-ion power batteries are widely used, especially in the field of new energy vehicles, power batteries are the bottleneck hindering the development of the industry. The state encourages the new energy vehicle industry, especially hybrid vehicles, fast charging and extended-range pure electric Public transport systems, etc., its application puts forward high requirements on the safety performance and fast charging and discharging performance of power batteries, and the battery material is the key performance that restricts the above performance. At present, most of the commercialized lithium-ion battery anode materials are graphite materials. However, during the charging and discharging process, with the intercalation ...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/66H01M10/0567H01M10/0525
CPCH01M4/485H01M4/66H01M10/0525H01M10/0567Y02E60/10
Inventor 王慧敏石先兴吕豪杰
Owner WANXIANG 123 CO LTD
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