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High-capacity 18650 lithium battery and preparation process thereof

A preparation process, lithium battery technology, applied in the direction of battery electrodes, secondary batteries, sustainable manufacturing/processing, etc., can solve the problems of insufficient environmental protection performance, reduced electrolyte stability, and large internal resistance of the electrolyte, etc., to achieve reduction Risk of spontaneous combustion, good development prospects, and low cost effects

Inactive Publication Date: 2019-05-03
湖南星际动力新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A Chinese patent discloses a high-capacity intelligent power lithium battery and its preparation method (authorized announcement CN102522587A). This patented technology has low cost, high battery yield, simple manufacturing process, high discharge rate, and good cycle performance. It has a good promotion Prospects, but the internal resistance of the electrolyte inside the lithium battery is large, the stability is poor, and it is sensitive to temperature, especially in a high-temperature environment, the stability of the electrolyte of the lithium battery will decrease sharply, there is a great potential safety hazard, and the environmental protection performance is not perfect. Therefore, those skilled in the art provide a high-capacity 18650 lithium battery and its preparation process to solve the problems raised in the above-mentioned background technology

Method used

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  • High-capacity 18650 lithium battery and preparation process thereof
  • High-capacity 18650 lithium battery and preparation process thereof
  • High-capacity 18650 lithium battery and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-capacity 18650 lithium battery, including positive electrode material, negative electrode material, electrolyte, casing and separator, the positive electrode material is divided into: positive electrode active material 90%, conductive agent 15%, binder 10%, balance as a solvent;

[0032] The negative electrode material is divided into: negative electrode active material 92%, binder 2%, thickener 2%, and the balance is solvent;

[0033] The electrolyte is divided into: 21% toluene, 1% bromophenol, 25% dimethylfuran, 5% pyrrolidone, 15% potassium methylsulfonimide, 1% lithium phosphate, 2,4-dichlorobenzene Hydrazine hydrochloride 1%, p-phenylenediamine oxalate 2%, tribromoethane 2%, dibromomethylfuran 25%.

[0034] Further, the positive electrode active material contained in the positive electrode material is one of nickel cobalt lithium manganese oxide and lithium manganese oxide, the conductive agent is graphene, and the binder is polyvinylidene fluoride.

[00...

Embodiment 2

[0050] A high-capacity 18650 lithium battery, including positive electrode material, negative electrode material, electrolyte, casing and separator, the positive electrode material is divided into: positive electrode active material 88%, conductive agent 12%, binder 9%, balance as a solvent;

[0051] The negative electrode material is divided into: negative electrode active material 93.5%, binder 2.5%, thickener 3%, and the balance is solvent;

[0052] The electrolyte is divided into: 25% toluene, 5% bromophenol, 31% dimethylfuran, 11% pyrrolidone, 21% potassium methylsulfonimide, 5% lithium phosphate, 2,4-dichlorobenzene Hydrazine hydrochloride 5%, p-phenylenediamine oxalate 5%, tribromoethane 7%, dibromomethyl furan 35%.

[0053] Further, the positive electrode active material contained in the positive electrode material is one of nickel cobalt lithium manganese oxide and lithium manganese oxide, the conductive agent is graphene, and the binder is polyvinylidene fluoride. ...

Embodiment 3

[0069] A high-capacity 18650 lithium battery, including positive electrode material, negative electrode material, electrolyte, casing and separator, the positive electrode material is divided into: positive electrode active material 86%, conductive agent 9%, binder 8%, balance as a solvent;

[0070] The negative electrode material is divided into: negative electrode active material 95%, binder 3%, thickener 4%, and the balance is solvent;

[0071] The electrolyte is divided into: toluene 23%, bromophenol 3%, dimethylfuran 27%, pyrrolidone 8%, methylsulfonimide potassium 18%, lithium phosphate 3.5%, 2,4-dichlorobenzene Hydrazine hydrochloride 3%, p-phenylenediamine oxalate 4%, tribromoethane 4.5%, dibromomethyl furan 30%.

[0072] Further, the positive electrode active material contained in the positive electrode material is one of nickel cobalt lithium manganese oxide and lithium manganese oxide, the conductive agent is graphene, and the binder is polyvinylidene fluoride.

...

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Abstract

The invention discloses a high-capacity 18650 lithium battery and a preparation process thereof, and relates to the technical field of new energy manufacturing. The lithium battery comprises a positive electrode material, a negative electrode material, an electrolyte, a shell and a diaphragm. The preparation process comprises the following steps: S1, performing dosing; S2, preparing materials; S3,performing coating; S4, performing coiling; S5, injecting liquid. During actual use, environment-friendly electrolyte is employed for preparing the lithium battery, so the lithium battery is green and environment friendly and the use capacity of the lithium battery can reach more than 85% of the theoretical capacity of the lithium battery. Moreover, the safety, the charge-discharge rate and the comprehensive performance of the lithium battery completely exceed national standard requirements, and the high-voltage, high-safety and high-rate charging and discharging are achieved. In addition, the spontaneous combustion risk of the battery can be effectively reduced through the added bromine-containing compound, the use safety of the lithium battery is improved, and the lithium battery is lowin cost and good in quality and has a good development prospect.

Description

technical field [0001] The invention relates to the technical field of new energy manufacturing, in particular to a high-capacity 18650 lithium battery and a preparation process thereof. Background technique [0002] With the development of the world economy, international oil prices have fluctuated violently in recent years, coupled with the expected reduction in future oil resources, oil has become a bottleneck for the development of the world economy. Energy conservation and consumption reduction, the development of circular economy, and the development of new energy sources have become important directions in today's world energy strategy. New energy vehicles have become a new development direction of the automobile industry due to their advantages such as high fuel utilization rate, low environmental pollution, and low noise. [0003] Since the beginning of the new century, countries around the world have attached great importance to the development of the new energy i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0566H01M10/0587H01M10/42H01M10/0567H01M4/36H01M4/62
CPCY02E60/10Y02P70/50
Inventor 肖小云
Owner 湖南星际动力新能源有限公司
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