Cylindrical lithium-ion battery and its manufacturing process

A manufacturing process and a lithium-ion technology, which are applied in the field of cylindrical lithium-ion batteries and their manufacturing processes, can solve the problems that the high-rate cycle performance of lithium-ion batteries needs to be improved, the rate performance of carbon-based lithium-ion electrode materials is poor, and the like. High rate discharge performance, excellent charge and discharge capacity, and the effect of promoting full dissolution

Active Publication Date: 2021-11-19
深圳市言九电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned related technologies, the inventor believes that the rate performance of the carbon-based lithium-ion electrode material prepared by this method is still poor, and the high-rate cycle performance of the prepared lithium-ion battery needs to be improved

Method used

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  • Cylindrical lithium-ion battery and its manufacturing process
  • Cylindrical lithium-ion battery and its manufacturing process
  • Cylindrical lithium-ion battery and its manufacturing process

Examples

Experimental program
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Effect test

Embodiment 1

[0067] The manufacturing process of the cylindrical lithium-ion storage battery of the present embodiment comprises the following steps:

[0068] 1) Preparation of spinning solution

[0069] Prepare the inner layer spinning solution: take 100g of the first solvent tetrahydrofuran, stir at 20°C, then add 12g of polystyrene particles under the stirring condition, and add the polystyrene particles in several times, about 1g each time, each time After the addition, after the polystyrene particles dissolve and disappear, add about 1g of polystyrene particles again until 12g of polystyrene is added, and then stir for 15 minutes to obtain the inner layer spinning solution;

[0070] Preparation of the middle layer spinning solution: Take 80g of the second solvent N,N-dimethylformamide (DMF), add 8g of polyacrylonitrile powder, swell for 20h, and then stir at 85°C for 18h at a speed of 500r / min to obtain Middle layer spinning solution;

[0071]Preparation of the outer layer spinning ...

Embodiment 2

[0086] The difference between the manufacturing process of the cylindrical lithium-ion battery of this embodiment and that of Embodiment 1 is that when preparing the inner layer spinning solution in step 1), 120 g of the first solvent chloroform is taken, stirred at 20° C., and then stirred Add 10g of polystyrene particles under certain conditions, add polystyrene particles several times, add about 1g each time, add about 1g of polystyrene particles after each addition until the polystyrene particles dissolve and disappear, until 10g of polystyrene particles are added polystyrene, and then stirred for 10 minutes to obtain the inner spinning solution. Others are all the same as in Example 1.

Embodiment 3

[0088] The difference between the manufacturing process of the cylindrical lithium-ion battery of this example and Example 1 is that when preparing the inner layer spinning solution in step 1), 1 g of 2-methyl-2- Butyl acrylate monomer and 3 g of styrene-methyl methacrylate copolymer. Others are all the same as in Example 1.

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Abstract

The application relates to the technical field of lithium-ion batteries, and specifically discloses a cylindrical lithium-ion battery and a manufacturing process thereof. The manufacturing process of the cylindrical lithium-ion storage battery of the present application includes the following steps: uniformly mixing the first solvent and the first substrate to obtain an inner layer spinning solution; uniformly mixing the second solvent and the second substrate to obtain a middle layer spinning solution; uniformly mixing the third solvent and the third matrix to obtain an outer layer spinning solution; using the obtained inner layer spinning solution, middle layer spinning solution, and outer layer spinning solution to perform three-channel coaxial electrospinning to obtain composite fibers; Under the protection of an inert atmosphere, the composite fiber is kept at 700-900° C. for 8-10 hours to obtain a composite negative electrode material; a cylindrical lithium-ion battery is prepared by using the composite negative electrode material as the negative electrode active material. The cylindrical lithium-ion storage battery prepared by the application has excellent charging and discharging performance, and has very good high-rate discharging capability.

Description

technical field [0001] The present application relates to the technical field of lithium-ion batteries, more specifically, it relates to a cylindrical lithium-ion battery and its manufacturing process. Background technique [0002] Lithium-ion batteries are widely used and have become the main energy storage devices in many fields such as electric vehicles, electronic products, and power tools. For the field of electric vehicles and electric tools, the high-current charging and discharging performance requirements of lithium-ion batteries are very high. Lithium-ion batteries with good rate performance can greatly shorten the charging time and improve the smoothness of electric vehicles and electric tools. The high-current discharge capability can meet the high-power usage scenarios that occur during the use of electric vehicles and electric tools, such as the acceleration of electric vehicles. For electric tools, when working, the instantaneous power of the tool changes gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0587H01M10/0525H01M4/36H01M4/587H01M4/04D01F8/02D01F8/08D01F8/10
CPCD01F8/02D01F8/08D01F8/10H01M4/0471H01M4/366H01M4/587H01M10/0525H01M10/0587H01M2004/021H01M2004/027H01M2220/20H01M2220/30Y02E60/10Y02P70/50
Inventor 王华平李朋唐松林向磊
Owner 深圳市言九电子科技有限公司
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