Bag lithium ion battery preparing method and battery thereby

A lithium-ion battery and bag-type technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of increased battery cost, increased battery process procedures, and difficulty in preparation, and achieves low production costs and low weight. The effect of lightness and large specific energy

Inactive Publication Date: 2003-11-19
FUJIAN NANPING NANFU BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, during the preparation of polymer batteries, in addition to preparing electrode sheets, polymer electrolytes must also be prepared, which increases the process and difficulty of preparing batteries, and increases the cost of batteries.

Method used

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  • Bag lithium ion battery preparing method and battery thereby
  • Bag lithium ion battery preparing method and battery thereby
  • Bag lithium ion battery preparing method and battery thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this example, combined with Figure 1a , Figure 1b to Figure 7 shown.

[0040] Preparation of positive electrode: 89 parts (by weight) of LiCoO 2 1. After mixing 6 parts of conductive graphite evenly, add 5 parts of binder PVDF that has been dissolved by organic solvent nitrogen methyl pyrrolidone (NMP), use mechanical stirring to form a uniform positive electrode slurry, and then apply it on such as Figure 7 The shown conductive base aluminum foil 11 is dried, rolled, and cut into a certain size positive electrode sheet. The pole piece thickness is 170μm.

[0041] Preparation of the negative electrode: 94 parts of the negative electrode material MCMB and 6 parts of the binder PVDF dissolved by the organic solvent nitrogen methyl pyrrolidone (NMP) were stirred in a stirring tank to form a uniform negative electrode slurry, and then coated on Figure 7 The shown conductive base copper foil 13 is dried, rolled, and cut to make a negative electrode sheet of a certa...

Embodiment 2

[0048] see Figure 1a , Figure 1b to Figure 7 As shown, 80 parts (by weight) of LiCoO 2 1. After 13 parts of conductive graphite are mixed evenly, 7 parts of binder PVDF dissolved by the organic solvent nitrogen methyl pyrrolidone (NMP) are added, mechanically stirred to form a uniform positive electrode slurry, and then coated on the conductive substrate aluminum foil 11 , after drying, rolling, and cutting into small positive pole pieces of a certain size, the tabs are left on the pole pieces. The pole piece thickness is 120μm.

[0049] Preparation of negative electrode: Stir 90 parts of negative electrode material graphite, 5 parts of conductive agent acetylene black and 5 parts of binder PVDF dissolved in organic solvent nitrogen methyl pyrrolidone (NMP) in a stirring tank to form a uniform negative electrode slurry material, and then coated on the conductive substrate copper foil 13, after drying, rolling, and cutting, a small negative electrode piece of a certain size...

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Abstract

The battery is composed of the packaging bag made from aluminum-plastic complex film, positive and negative pole pieces, diaphragms, pole ears and electrolyte. The preparing method includes following technical procedures: forming the container for battery core, preparing and shaping positive and negative pole pieces, charging electrolyte, sealking etc. Under general environment, the method can manufacture batteries with different thickness and shapes in low cost and easy operations. The battery possesses the features of high density, lightweight, small size, large discharging current and good periodicity etc.

Description

technical field [0001] The invention relates to a battery, specifically a method for preparing a pouch lithium ion battery and a pouch lithium ion battery prepared by the method. The battery prepared by the method has the advantages of light weight, high specific energy and good safety , The advantages of good battery performance. Background technique [0002] Compared with traditional secondary batteries, lithium-ion batteries have higher voltage, specific power and specific energy, and at the same time have the advantages of small size and light weight. These advantages make lithium-ion batteries widely used in the growing small portable appliances Applications, people are developing lithium-ion batteries of different systems and shapes to meet the needs of different users. [0003] The lithium-ion batteries commonly found in the market today are hard-shell lithium-ion batteries, and there are also a small number of polymer lithium-ion batteries packaged in aluminum and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 万传云王志伟付春水苏盛甘健龙张清顺江志裕丁曦明陈永心陈米茂
Owner FUJIAN NANPING NANFU BATTERY
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