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A kind of manufacturing method of lithium ion battery

A technology of lithium-ion batteries and manufacturing methods, which is applied in the manufacture of electrolyte batteries, secondary batteries, and final product manufacturing, and can solve problems such as cumbersome feeding steps, achieve low cost, save production equipment and production time, and simple feeding process Effect

Active Publication Date: 2020-08-07
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the technical solution disclosed in this patent application, the process of preparing the slurry after mixing the glue first requires glue making equipment and homogenizing equipment. At the same time, all powders need to be weighed. The feeding step is relatively cumbersome and requires manual weighing. or mechanical feeding

Method used

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  • A kind of manufacturing method of lithium ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A method for manufacturing a lithium ion battery, the steps of which are as follows:

[0070] (1) Preparation of electrode material powder

[0071] The positive electrode material, conductive agent, binder, and additives are batch mixed in a mass ratio of 88:7:4:1; the positive electrode material in this embodiment is a ternary material, the conductive agent is conductive carbon black, and the binder is Polyvinylidene fluoride (PVDF), the additive is bismaleimide oligomer, and the raw material dry powder with a total weight of 1 ton is batch-mixed by a high-speed mixer to obtain a uniform pre-mixed powder;

[0072] (2) Preparation of preform

[0073] Add the premixed powder into a compression molding machine with a mold shape of a cuboid. The weight of each feeding is 2kg, and the preforms with a Mohs hardness of 1 are obtained by pressing 500 pieces, which can meet the needs of a 100L-capacity dual planetary mixer for 10 lithium-ion battery cathodes. Production of sl...

Embodiment 2

[0086] A method for manufacturing a lithium ion battery, the steps of which are as follows:

[0087] (1) Preparation of electrode material powder

[0088] The positive electrode material, conductive agent, binder, and additives are batch-mixed at a mass ratio of 80:10:5:5; the positive electrode material in this embodiment is a ternary material, the conductive agent is conductive carbon black, and the binder is PVDF and additives are bismaleimide oligomers, and the raw material dry powder with a total weight of 1 ton is batch-mixed by a high-speed mixer to obtain a uniform pre-mixed powder;

[0089] (2) Preparation of preform

[0090] Add the premixed powder into a compression molding machine with a cylindrical mold shape, and the mass of each feeding is 5kg, and press to obtain 500 pieces of prefabricated bodies with a Mohs hardness of 4, which can meet the needs of a 100L-capacity dual planetary mixer for 10 lithium-ion batteries. Production of cathode slurry;

[0091] (3...

Embodiment 3

[0103] A method for manufacturing a lithium ion battery, the steps of which are as follows:

[0104] (1) Preparation of electrode material powder

[0105] The positive electrode material, conductive agent, binder, and additive are batch-mixed at a mass ratio of 95:1:2:2; the positive electrode material in this embodiment is a ternary material, the conductive agent is conductive carbon black, and the binder is PVDF and additives are bismaleimide oligomers, and the raw material dry powder with a total weight of 1 ton is batch-mixed by a high-speed mixer to obtain a uniform pre-mixed powder;

[0106] (2) Preparation of preform

[0107] Add the premixed powder into the compression molding machine with a mold shape of a sphere, each feeding mass is 2kg, and press to obtain 500 prefabricated bodies with a Mohs hardness of 1, which can meet the needs of a 100L-capacity dual planetary mixer for 10 lithium-ion battery cathodes Production of slurry;

[0108] (3) Preparation of lithiu...

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Abstract

The invention relates to a lithium ion battery manufacturing method, which belongs to the technical field of lithium ion battery preparation. The steps of the method are as follows: (1) preparation of electrode material powder; (2) preparation of prefabricated body; (3) preparation of lithium ion battery slurry; (4) preparation of pole piece; (5) preparation of electric core; 6) Li-ion battery preparation. The prefabricated body feeding equipment applicable to the production of lithium-ion batteries of the present invention is easy to operate, reduces the probability of powder dust and loss, is easy to operate mechanized, and greatly reduces production errors and production time.

Description

technical field [0001] The invention relates to a lithium ion battery manufacturing method, which belongs to the technical field of lithium ion battery manufacturing. Background technique [0002] In recent years, with the continuous improvement of the storage capacity and production technology of lithium-ion batteries, lithium-ion batteries have become the main energy storage devices for electronic products and electric vehicles. At the same time, the market demand for lithium-ion batteries has increased significantly, and at the same time, the demand for production costs, production efficiency, and performance consistency of lithium-ion batteries has also increased. [0003] Automotive power batteries have high requirements for the consistency of performance of lithium-ion batteries, and the requirements for the consistency of positive and negative electrode materials have also increased accordingly. In the production process of electrode materials, no matter how high the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/0525
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 王琦赵挺杨容柏祥涛高哲峰庄卫东
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD