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A kind of fast-charging high-rate lithium-ion battery and preparation method thereof

A lithium battery, high rate technology, applied in the direction of lithium battery, electrolyte battery manufacturing, battery electrodes, etc., can solve the problem of long charging time, and achieve the effect of simple manufacturing process, low cost and good effect

Active Publication Date: 2022-03-18
HUIZHOU WES NEW ENERGY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a fast-charging high-rate lithium-ion battery and a preparation method thereof, aiming to solve the problem of long charging time of existing lithium batteries

Method used

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  • A kind of fast-charging high-rate lithium-ion battery and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, a fast-charging high-rate lithium-ion battery includes a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte, the positive electrode sheet includes a positive electrode current collector and a positive electrode slurry, and the negative electrode sheet includes a negative electrode current collector and a negative electrode slurry. During preparation, the positive electrode slurry is evenly coated on the positive electrode current collector, baked at 90°C for 15 hours, and then rolled to obtain the positive electrode sheet; the negative electrode slurry is evenly coated on the negative electrode current collector, baked at 90°C After 15 hours, the negative electrode sheet is obtained by rolling; after the obtained positive and negative electrode sheets are cut, the cell is made of a stacked structure or a winding structure in the order of the positive electrode sheet, separator, and negative electrode sheet; then the e...

Embodiment 2

[0037] In this embodiment, a fast-charging high-rate lithium-ion battery includes a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte, the positive electrode sheet includes a positive electrode current collector and a positive electrode slurry, and the negative electrode sheet includes a negative electrode current collector and a negative electrode slurry. During preparation, the positive electrode slurry is evenly coated on the positive electrode current collector, baked at 90°C for 15 hours, and then rolled to obtain the positive electrode sheet; the negative electrode slurry is evenly coated on the negative electrode current collector, baked at 90°C After 15 hours, the negative electrode sheet is obtained by rolling; after the obtained positive and negative electrode sheets are cut, the cell is made of a stacked structure or a winding structure in the order of the positive electrode sheet, separator, and negative electrode sheet; then the e...

Embodiment 3

[0045] In this embodiment, a fast-charging high-rate lithium-ion battery includes a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte, the positive electrode sheet includes a positive electrode current collector and a positive electrode slurry, and the negative electrode sheet includes a negative electrode current collector and a negative electrode slurry. During preparation, the positive electrode slurry is evenly coated on the positive electrode current collector, baked at 105°C for 20 hours, and then rolled to obtain the positive electrode sheet; the negative electrode slurry is evenly coated on the negative electrode current collector, baked at 105°C After 20 hours, the negative electrode sheet is obtained by rolling; after the obtained positive and negative electrode sheets are cut, the cell is made of a laminated structure or a winding structure in the order of the positive electrode sheet, separator, and negative electrode sheet; then t...

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Abstract

The invention is applicable to the technical field of lithium batteries, and provides a fast-charging high-rate lithium battery, including a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte, the positive electrode sheet includes a positive electrode current collector and a positive electrode slurry, and the negative electrode sheet includes a negative electrode current collector. And the negative electrode slurry, the positive electrode slurry includes the following raw materials: lithium iron phosphate, positive electrode binder, positive electrode conductive agent, black pitch, modified nano gelling stone, solvent, and the negative electrode slurry includes the following raw materials: graphite, Lithium manganese oxide, modified white carbon black, negative electrode binder, negative electrode conductive agent, deionized water, the invention also discloses the preparation method of the lithium battery, by adding black pitch and modified nano Jiaolingite can hold more lithium, reduce the internal resistance of the battery, and improve the rate performance of the battery. The synergy between black pitch and modified nano-jiaolinite has a better effect; graphite and Lithium manganese oxide, which forms a dense network that can conduct electricity, helps to charge faster.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a fast-charging high-rate lithium-ion battery and a preparation method thereof. Background technique [0002] Lithium batteries are a type of batteries that use lithium metal or lithium alloys as positive / negative electrode materials and use non-aqueous electrolyte solutions. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Among them, the internal materials of lithium ion batteries are composed of four parts: negative electrode material, electrolyte, separator and positive electrode material; [0003] The charging process is basically the process in which lithium ions come out of the positive electrode, pass through the diaphragm and electrolyte, and diffuse to the negative electrode. Therefore, the positive electrode material, electrolyte, and diaphragm negative electrode material all have certain effects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/58H01M4/74H01M4/587H01M10/0567H01M10/052H01M10/058B82Y40/00B82Y30/00
CPCH01M4/62H01M4/624H01M4/625H01M4/628H01M4/5825H01M4/745H01M4/587H01M10/0567H01M10/052H01M10/058B82Y40/00B82Y30/00Y02E60/10Y02P70/50
Inventor 龙梅肖世玲宋金涛胡红英李岗万二威
Owner HUIZHOU WES NEW ENERGY LIMITED