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Lithium ion battery processing method

A lithium-ion battery and processing method technology, applied in secondary batteries, battery electrodes, battery pack components, etc., can solve the problems of increasing the thickness of the diaphragm, the difficulty of producing the diaphragm, the diaphragm cannot effectively isolate the positive and negative electrodes, and the battery short circuit, etc. Achieve the effect of avoiding potential safety hazards and equipment damage, improving capacity and cycle performance, and strong charge and discharge capacity

Pending Publication Date: 2021-10-01
淮北享锂电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction of the thickness of the diaphragm increases the difficulty of the production of the diaphragm, which is easy to cause quality defects, so that the diaphragm cannot effectively isolate the positive and negative electrodes, which in turn causes the problem of short circuit and explosion of the battery. A lithium-ion battery processing method is proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for processing a lithium-ion battery proposed by the present invention, the lithium-ion battery is composed of a positive electrode, a negative electrode, a diaphragm and an electrolyte, the positive and negative electrodes are soaked in the electrolyte and separated by a diaphragm; the processing method of the lithium-ion battery , including the following steps:

[0032] S1. Preparation of positive and negative electrodes:

[0033] (1) According to the mass ratio of 35:8:1, lithium nickelate, acetylene black and polyvinylidene fluoride are jointly added to the jet mill, and ground to obtain powder I with a particle size of 10 μm, according to the ratio of material to liquid 1:2 After dispersing and stirring the powder I and the organic solvent I to make a paste, evenly apply it on the aluminum foil collector, dry and roll it to make a positive electrode;

[0034] (2) According to the mass ratio of 32:4:1, graphite, graphene and polyvinylidene fluoride are joi...

Embodiment 2

[0043] A method for processing a lithium-ion battery proposed by the present invention, the lithium-ion battery is composed of a positive electrode, a negative electrode, a diaphragm and an electrolyte, the positive and negative electrodes are soaked in the electrolyte and separated by a diaphragm; the processing method of the lithium-ion battery , including the following steps:

[0044] S1. Preparation of positive and negative electrodes:

[0045] (1) According to the mass ratio of 35:12:1, lithium nickelate, acetylene black and polyvinylidene fluoride are jointly added to the jet mill, and ground to obtain powder I with a particle size of 12 μm, according to the material-to-liquid ratio of 1:2.2 After dispersing and stirring the powder I and the organic solvent I to make a paste, evenly apply it on the aluminum foil collector, dry and roll it to make a positive electrode;

[0046](2) According to the mass ratio of 32:8:1, graphite, graphene and polyvinylidene fluoride are j...

Embodiment 3

[0055] A method for processing a lithium-ion battery proposed by the present invention, the lithium-ion battery is composed of a positive electrode, a negative electrode, a diaphragm and an electrolyte, the positive and negative electrodes are soaked in the electrolyte and separated by a diaphragm; the processing method of the lithium-ion battery , including the following steps:

[0056] S1. Preparation of positive and negative electrodes:

[0057] (1) According to the mass ratio of 38:10:1, lithium nickelate, acetylene black and polyvinylidene fluoride are jointly added to the jet mill, and ground to obtain powder I with a particle size of 15 μm, according to the material-to-liquid ratio of 1:2.5 After dispersing and stirring the powder I and the organic solvent I to make a paste, evenly apply it on the aluminum foil collector, dry and roll it to make a positive electrode;

[0058] (2) According to the mass ratio of 35:6:1, graphite, graphene and polyvinylidene fluoride are ...

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Abstract

The invention belongs to the technical field of lithium ion battery processing, particularly relates to a lithium ion battery processing method, and solves the problems in the prior art that in order to improve the energy density of a lithium ion battery, a thin diaphragm is often selected and used so as to store more electric energy in a limited volume, the reduction of the thickness of the diaphragm increases the production difficulty of the diaphragm, quality defects are easily caused, a positive electrode and a negative electrode cannot be effectively isolated by the diaphragm, and then short circuit and explosion of the battery are caused. The lithium ion battery is composed of a positive electrode, a negative electrode, a diaphragm and an electrolyte, wherein the positive electrode and the negative electrode are soaked in the electrolyte and are separated by the diaphragm. According to the lithium ion battery processing method provided by the invention, the capacity and the safety of the lithium ion battery are improved by optimizing the overall component of the lithium ion battery, potential safety hazards and equipment damage caused by purely reducing the thickness of the diaphragm in the prior art are avoided. The method is simple to operate, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery processing, in particular to a lithium ion battery processing method. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Lithium-ion batteries are widely used in consumer electronics, electric vehicles and other fields due to their advantages such as high output voltage, long cycle life, high energy density, low self-discharge rate, and wide operating temperature range. At the same time, the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M10/0566H01M4/1391H01M4/1393H01M4/04H01M50/403H01M50/423H01M50/446H01M50/449H01M50/489H01M10/0525
CPCH01M10/0587H01M10/0566H01M4/1391H01M4/1393H01M4/0404H01M4/0435H01M50/403H01M50/449H01M50/423H01M50/446H01M50/489H01M10/0525Y02P70/50Y02E60/10
Inventor 尹晓磊王明舟汪胜陈鑫刘勇
Owner 淮北享锂电子科技有限公司
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