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Manufacturing method of high-performance safe soft package lithium ion battery

A technology for ion batteries and manufacturing methods, which can be used in the manufacture of secondary batteries, battery pack components, and final products, and can solve problems such as difficulty in infiltration

Inactive Publication Date: 2021-05-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-performance and safe soft-pack lithium-ion battery manufacturing method, which can effectively solve the problem of difficult wetting caused by the excessively large composite adhesive force of the oil-based separator in the production process of the soft-pack lithium-ion battery

Method used

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  • Manufacturing method of high-performance safe soft package lithium ion battery
  • Manufacturing method of high-performance safe soft package lithium ion battery

Examples

Experimental program
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Embodiment 1

[0027] A method for manufacturing a high-performance safe soft-pack lithium-ion battery, specifically comprising the following steps:

[0028] (1) On the 12-micron thick PE base film, two layers of boehmite ceramic layers with a thickness of 2 microns are first coated, and then two layers of oil-based PVDF adhesive layers are coated using an intercoating process; the melting point of selected oil-based PVDF is 155±2℃, the width of each glued area in the oil-based PVDF adhesive layer is 3mm, and the width of each uncoated area is 0.5mm, the area of ​​the glued area and the non-adhesive area in each oil-based PVDF adhesive layer The ratio is equal to six;

[0029] (2), use the above-mentioned separator to laminate through thermal compounding process, control the angle between the stripe direction of the separator and the direction of the bottom edge of the battery cell to be 45±10° during lamination, and prepare a stacked battery cell;

[0030] (3) After packaging, inject liqui...

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Abstract

The invention discloses a manufacturing method of a high-performance safe soft package lithium ion battery. The manufacturing method comprises the following steps: firstly coating a base membrane with a ceramic layer, then coating with two layers of oil series PVDF adhesive layers by adopting an intermittent coating process to form a diaphragm, and then laminating by using the diaphragm through a thermal compounding process to prepare a laminated battery cell; and sequentially carrying out liquid injection, vacuum sealing, high-temperature infiltration, high-temperature pressure formation, hot-pressing treatment and aging on the packaged battery cell, and finally, performing vacuum pumping and sealing. The oil-based glued diaphragm is prepared by adopting the intermittent coating process, so that the problem of infiltrating difficulty caused by large composite adhesive force of the oil-based diaphragm in a soft package lithium ion production process can be effectively solved, and a good formation interface, no black spots and no precipitated lithium are ensured; and the soft package battery manufactured by the invention has the advantages of high battery cell hardness and high mechanical strength.

Description

technical field [0001] The invention relates to the field of lithium-ion battery manufacturing, in particular to a method for manufacturing a high-performance and safe soft-pack lithium-ion battery. Background technique [0002] Lithium-ion batteries are known as the "green chemical energy" of the 21st century, and have been widely used in many fields such as 3C consumer electronics, power batteries, and energy storage. Compared with lithium-ion batteries such as traditional steel shells and aluminum shells, the soft-pack lithium-ion battery has flexible design, the shape of the battery cell can be arbitrary, the energy density is higher, and the safety of the battery is better. When a safety problem occurs, the soft-pack lithium Ion batteries are generally flattened and cracked, and are not prone to explosion. [0003] When the composite lamination process is used for the production of soft-packed lithium-ion batteries, ceramic rubber-coated separators are generally used t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/426H01M50/449H01M50/489H01M50/105H01M10/0585H01M10/0525
CPCH01M10/0585H01M10/0525Y02E60/10Y02P70/50
Inventor 王从周曹勇王义飞苏峰赵伟张壁
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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