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Lithium ion power cell and preparation method of lithium ion power cell

A power battery, lithium ion technology, applied in the field of lithium ion power battery, can solve the problems of complex process, large environmental pollution, affecting the adhesive performance of adhesives, etc., and achieve the effects of simple production method, good safety performance and low cost

Inactive Publication Date: 2014-09-24
ZHUHAI LIYUAN NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When making electrode slurry, the commonly used binder is PVDF, and the commonly used solvent is NMP. However, the problem with using NMP is that it is highly polluting to the environment, and NMP is a flammable and explosive item. In the process of making electrode slurry, It is necessary to pay attention to the removal of NMP in a timely manner. In addition, because NMP can absorb water, which will affect the adhesive performance of the adhesive. Therefore, in the process of making electrodes, the moisture content of NMP must be controlled, so the process will become complicated.

Method used

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  • Lithium ion power cell and preparation method of lithium ion power cell
  • Lithium ion power cell and preparation method of lithium ion power cell
  • Lithium ion power cell and preparation method of lithium ion power cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The formula composition of a kind of lithium-ion power battery negative pole piece material is as follows table 1:

[0028]

[0029] The formula composition of a kind of lithium-ion power battery cathode sheet material is as follows table 2:

[0030]

[0031] Diaphragm: PP single-layer diaphragm

[0032] Electrolyte: 1.2mol / L LiPF 6 Solution, the solvent composition is EC:DMC:EMC=1:1:1

[0033] The shell is a plastic shell

[0034] The specific preparation method is as follows:

[0035] 1) Production of positive electrode sheet: add positive electrode material according to the formula, add water to dissolve, stir evenly with double star power mixer at high speed, eliminate air bubbles and iron filings, and obtain positive electrode slurry, pass positive electrode slurry through automatic feeding system and coating machine Evenly coated on aluminum foil, baked at 80°C for 12 hours in a vacuum environment, rolled and cut into positive electrode sheets;

[0036]...

Embodiment 2

[0040] The formula composition of a kind of lithium-ion power battery negative pole piece material is as follows table 3:

[0041]

[0042] The formula composition of a kind of lithium-ion power battery cathode sheet material is as follows table 4:

[0043]

[0044] Diaphragm: PP single-layer diaphragm

[0045] Electrolyte: 1.2mol / L LiPF 6 Solution, the solvent composition is EC:DMC:EMC=1:1:1

[0046] The shell is a plastic shell

[0047] The specific preparation method is as follows:

[0048] 1) Production of positive electrode sheet: add positive electrode material according to the formula, add water to dissolve, stir evenly with double star power mixer at high speed, eliminate air bubbles and iron filings, and obtain positive electrode slurry, pass positive electrode slurry through automatic feeding system and coating machine Evenly coated on aluminum foil, baked at 100°C for 10 hours in a vacuum environment, rolled, cut into positive electrode sheets;

[0049] 2) ...

Embodiment 3

[0053] The formula composition of a kind of lithium-ion power battery negative pole piece material is as follows table 5:

[0054]

[0055] The formula composition of a kind of positive pole plate material of lithium-ion power battery is as follows table 6:

[0056]

[0057] Diaphragm: PP single-layer diaphragm

[0058] Electrolyte: 1.2mol / L LiPF 6 Solution, the solvent composition is EC:DMC:EMC=1:1:1

[0059] The shell is a plastic shell

[0060] The specific preparation method is as follows:

[0061] 1) Production of positive electrode sheet: add positive electrode material according to the formula, add water to dissolve, stir evenly with double star power mixer at high speed, eliminate air bubbles and iron filings, and obtain positive electrode slurry, pass positive electrode slurry through automatic feeding system and coating machine Evenly coated on aluminum foil, baked at 120°C for 5 hours in a vacuum environment, rolled, cut into positive electrode sheets;

...

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Abstract

The invention discloses a lithium ion power battery and a preparation method of the lithium ion power battery. The negative electrode material is composed of the following raw materials in mass percentage: 83-94% lithium titanate, 2-10% binder, 3- 10% conductive agent, the positive electrode material is composed of the following raw materials in mass percentage: 82-93% lithium manganate, 1-10% binder, 4-12% conductive agent. The lithium-ion power battery of the present invention has lower cost, larger capacity, long cycle life, and good safety performance, and can be applied to many fields, such as hybrid electric vehicles, military articles with high performance requirements, etc.; the manufacturing method of the present invention is simple; because In the process of making electrodes, NMP is not used, but water is used as a solvent. Therefore, there will be no pollution, and there will be no dangerous accidents such as explosion or combustion, zero pollution emissions, and at the same time reduce the complexity of the battery manufacturing process.

Description

technical field [0001] The invention relates to a lithium ion power battery and a preparation method of the lithium ion power battery. Background technique [0002] The world's energy and environmental protection situation is becoming increasingly tense, and batteries are increasingly favored by people as a new energy source. Due to its high energy density, light volume, small weight, environmental protection and pollution-free, lithium-ion batteries have become the main direction of new energy development. With the rapid development of electric vehicles, space technology, national defense industry, and power storage systems, higher requirements are put forward for the specific capacity, cycle life, and safety of secondary batteries, and the electrochemical performance of batteries is improved. It can start with electrode materials and other aspects. [0003] Traditional lithium-ion batteries all use graphite as the main active material of the negative electrode material. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M4/62H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 李宝玉王保刘兴福
Owner ZHUHAI LIYUAN NEW ENERGY TECH
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