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Lithium ion battery

A lithium ion battery and electrolyte technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of easy growth of lithium dendrites, pierce the separator, hidden dangers of battery safety, etc. Beneficial effects of ejection and insertion, good cycle life and safety

Inactive Publication Date: 2018-11-13
CONTEMPORARY AMPEREX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the battery itself does not have the ability of fast charging, if it is forced to fast charge, lithium dendrites will easily grow on the surface of the negative electrode, which will lead to a series of adverse effects on the battery, such as increased battery polarization, reduced battery power performance, The life of the battery is shortened sharply, etc. At the same time, the continuous growth of lithium dendrites during the use of the battery may also pierce the isolation film and cause an internal short circuit, which brings safety hazards to the battery

Method used

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Embodiment Construction

[0008] The lithium ion battery of the present invention will be described in detail below.

[0009] The lithium ion battery of the present invention comprises a positive electrode sheet, a negative electrode sheet, a separator and an electrolyte, the positive electrode sheet includes a positive electrode current collector and a positive electrode film that is arranged on at least one surface of the positive electrode current collector and includes a positive electrode active material, The positive electrode active material includes a lithium-containing compound with a layered structure, and the positive electrode membrane satisfies 0.01≤OI c ×PD c ≤0.80. Among them, OI c is the OI value of the positive diaphragm; PD c is the compacted density of the positive electrode membrane, in g / dm 3 .

[0010] OI value OI of positive diaphragm c =C 003 / C 110 , where C 003 is the peak area of ​​the 003 characteristic diffraction peak in the X-ray diffraction pattern of the positi...

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Abstract

The invention provides a lithium ion battery which comprises a positive electrode piece, a negative electrode piece, an isolating membrane and electrolyte solution. The positive electrode piece comprises a positive electrode current collector and positive electrode diaphragms, the positive electrode diaphragms are arranged on at least one surface of the positive electrode current collector and comprise positive electrode active materials, the positive electrode active materials comprise layered lithium-containing compounds, and the positive electrode diaphragms meet the equation of 0.01<=OIc*PDc<=0.80. The lithium ion battery has less expansion and high charging ability and excellent circulation service life and safety when being rapidly charged for a long time.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a lithium ion battery. Background technique [0002] In recent years, the environmental problems and fuel economy problems caused by fuel vehicles have attracted more and more attention. People urgently need a green, environmentally friendly and economical new energy vehicle to alleviate the environmental problems and economical problems caused by fuel vehicles. question. Due to the advantages of high voltage, high energy density, long cycle life, low self-discharge, and no pollution, lithium-ion batteries have become an indispensable part of new energy vehicles. Lithium-ion batteries are the heart of new energy vehicles. , Cycle life directly determines the user's experience of new energy vehicles, and safe and fast charging, long cycle life has always been a hot spot in the research and improvement of lithium-ion batteries. [0003] In order to shorten the charging time of new energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525
CPCH01M10/0525H01M4/131H01M4/133Y02E60/10H01M10/0459H01M4/02H01M4/366H01M4/505H01M4/525H01M4/587H01M2004/021
Inventor 许文竹邹启凡卢光波王升威曹娇
Owner CONTEMPORARY AMPEREX TECH CO LTD
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