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Manufacturing method of cylindrical lithium ion battery

A lithium-ion battery, cylindrical technology, applied in the manufacture of electrolyte batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of low power consumption of LED lighting, as small as tens of milliamps to hundreds of milliamps, waste, etc. , to achieve the effect of reducing equipment investment, production and labor costs, and improving production efficiency

Inactive Publication Date: 2014-02-12
浙江吉能电池科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low power consumption of LED lighting, when LEDs are used as emergency lights, flashlights, lawn lights, etc., the discharge current only needs to be as small as tens of milliamperes to hundreds of milliamperes for the supporting lithium-ion batteries, such as 18650 batteries 0.02C-0.10C), there is no need for large current discharge capacity, so it is a bit wasteful to use a coating process to manufacture batteries that can discharge at a high rate

Method used

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  • Manufacturing method of cylindrical lithium ion battery
  • Manufacturing method of cylindrical lithium ion battery
  • Manufacturing method of cylindrical lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1 Preparation of 18650 lithium manganate battery

[0055] Positive electrode ratio: 90% (by weight) LiMn 2 o 4 + 8% acetylene black + 2 conductive graphite, dry powder and stir evenly, then add 10% of the total weight of positive electrode powder NMP, continue to stir evenly, the electrolyte is 1MLiPF 6 +EC+DME+DMC(1:1:1).

[0056] The stirred lithium manganate powder is pressed into a positive electrode powder ring in a self-made ring machine, and three powder rings are added to each battery. The size of the powder ring is: outer diameter 17.5mm, inner diameter 8.0mm, height 19.0mm , the weight of each powder ring is: 30.0±0.5g; the outer diameter of the negative pole is 8.0mm, the height is 58.0mm, and the weight of each powder ring is: 14.0±0.5g. Wrap the negative rod with 2 layers of 20-micron-thick polypropylene diaphragm, put it into the positive powder ring, and then inject 9.0g of electrolyte, seal it in a rolling groove, and leave it at room temperat...

Embodiment 2

[0061] Example 2 Preparation of 26650 type lithium iron phosphate battery

[0062] Positive electrode ratio: 90% (weight ratio) lithium iron phosphate + 8% acetylene black + 2% conductive graphite, dry powder and stir evenly, then add 10% of the total weight of positive electrode powder NMP, continue to stir evenly, the electrolyte is 1MLiPF 6 +EC+DME+DMC(1:1:1).

[0063] The stirred positive electrode powder is pressed into a positive electrode powder ring in a self-made ring machine, and three powder rings are added to each battery. The size of the powder ring is: outer diameter 25.2mm, inner diameter 15.0mm, height 19.0mm, each The weight of each powder ring is: 48.0±0.5g; the outer diameter of the negative pole is 15.0mm, the height is 58.0mm, and the weight of each powder ring is: 21.0±0.5g. Wrap the negative electrode with 2 layers of 20-micron-thick polypropylene diaphragm, put it into the positive electrode ring, and then inject 20g of electrolyte, after being sealed ...

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Abstract

The invention relates to a minitype cylindrical lithium ion battery, and in particular relates to a rapid manufacturing method of a lithium ion battery suitable for being used for an LED (light emitting diode) lamp under a low-current discharge condition. Different from the traditional method for coating on an aluminum foil or a copper foil for molding a positive electrode and a negative electrode in the traditional production technology, the manufacturing method provided by the invention comprises the following steps: directly mixing a positive electrode powder material or a negative electrode powder material and an electric conduction agent uniformly; pressing an obtained mixture into an annular shape or a cylindrical shape by a looping machine at first; then, inserting the annular or cylindrical mixture into the middle of an annular electrode after the mixture is covered with a diaphragm externally; and mounting the mixture with the covered diaphragm into a steel shell and assembling into a battery directly. According to the method provided by the invention, complex production links, such as paste mixing, coating, rolling, splitting, plate manufacturing, coiling and the like, for the traditional lithium ion battery are cancelled, the production technology is simplified, the production efficiency is increased greatly, the device investment is reduced by more than two thirds, the production cost and labor cost of the battery are also greatly lowered by more than one half, and the manufacturing method is suitable for low-cost rapid manufacturing of various lithium ion batteries with low-current discharge, which are suitable for being used in LED lamps and the like.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery manufacturing, in particular to a low-cost and rapid preparation method for a small cylindrical lithium ion battery, especially a small cylindrical lithium ion battery suitable for use under low current discharge conditions of LED lamps. Background technique [0002] Lithium-ion battery is a kind of rechargeable battery, which generally uses materials containing lithium element as the positive electrode, and mainly relies on lithium ions to move between the positive electrode and the negative electrode 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 battery is a repres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M4/139
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 吕焕祥张立军甘永平陶新永钱灵超
Owner 浙江吉能电池科技有限公司
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