Thermal compounding process of composite aluminum-plastic film used for power battery

A technology of power battery and composite process, applied in chemical instruments and methods, lamination auxiliary operations, lamination and other directions, can solve the problems of substrate flexibility damage, time-consuming and energy consumption, etc., to enhance adhesion and reduce solvents Residue, enhanced bonding or passivation effect

Active Publication Date: 2020-12-01
GUANGDONG ANDELI NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, two processes of thermal compounding and dry compounding are mainly used to prepare composite aluminum-plastic films. The thermal compounding process refers to thermal compounding of aluminum foil and heat-sealing layer CPP film materials with hot melt adhesive as the binder. The advantage is that the product is weather resistant. Good durability, no need to use a large amount of organic solvents in the production process, more environmentally friendly, and more suitable for large-scale continuous production, but the traditional thermal lamination process requires high-temperature hot-press bonding, resulting in damage to the flexibility of the substrate, and requires high-temperature curing storage, time consuming

Method used

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  • Thermal compounding process of composite aluminum-plastic film used for power battery

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Effect test

Embodiment 1

[0038] A thermal lamination process for a composite aluminum-plastic film for a power battery, comprising the following steps:

[0039] (1) Aluminum foil pretreatment: treat the grease attached to the surface of the aluminum foil, and apply 12g / m on the aluminum foil 2 The coating amount is evenly coated with modified polyurethane glue, and then dried in three temperature ranges of 75°C, 85°C, and 100°C to obtain pretreated aluminum foil; the modified polyurethane glue is made of polyester / ether polyol, carbon Prepared by dissolving nanotubes, polyisocyanate and additives in ethyl acetate at a mass ratio of 15:3:3:2.5;

[0040](2) Dry compounding of nylon and aluminum foil: the nylon after corona treatment and the pretreated aluminum foil are dry compounded by a compounding machine at 75-80°C, so that the nylon is compounded on the aluminum foil, cured and formed, Winding after cooling to obtain PA / Al composite film;

[0041] (3) PA / Al composite film curing: place the PA / Al ...

Embodiment 2

[0047] A thermal lamination process for a composite aluminum-plastic film for a power battery, comprising the following steps:

[0048] (1) Aluminum foil pretreatment: treat the grease attached to the surface of the aluminum foil, and use 8g / m2 on the aluminum foil 2 The coating amount is evenly coated with modified polyurethane glue, and then dried in three temperature ranges of 75°C, 85°C, and 100°C to obtain pretreated aluminum foil; the modified polyurethane glue is made of polyester / ether polyol, carbon Prepared by dissolving nanotubes, polyisocyanate and additives in ethyl acetate at a mass ratio of 20:4:4:4;

[0049] (2) Dry compounding of nylon and aluminum foil: the nylon after corona treatment and the pretreated aluminum foil are dry compounded by a compounding machine at 75-80°C, so that the nylon is compounded on the aluminum foil, cured and formed, Winding after cooling to obtain PA / Al composite film;

[0050] (3) PA / Al composite film curing: place the PA / Al com...

Embodiment 3

[0056] A thermal lamination process for a composite aluminum-plastic film for a power battery, comprising the following steps:

[0057] (1) Aluminum foil pretreatment: treat the grease attached to the surface of the aluminum foil, and use 5g / m2 on the aluminum foil 2 The coating amount is evenly coated with modified polyurethane glue, and then dried in three temperature ranges of 75°C, 85°C, and 100°C to obtain pretreated aluminum foil; the modified polyurethane glue is made of polyester / ether polyol, carbon Prepared by dissolving nanotubes, polyisocyanate and additives in ethyl acetate at a mass ratio of 25:5:5:6;

[0058] (2) Dry compounding of nylon and aluminum foil: the nylon after corona treatment and the pretreated aluminum foil are dry compounded by a compounding machine at 75-80°C, so that the nylon is compounded on the aluminum foil, cured and formed, Winding after cooling to obtain PA / Al composite film;

[0059] (3) PA / Al composite film curing: place the PA / Al com...

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Abstract

The invention discloses a thermal compounding process of a composite aluminum-plastic film used for a power battery, belonging to the technical field of power battery packaging films. The thermal compounding process comprises the steps of pretreatment of an aluminum foil, dry compounding of nylon and the aluminum foil, curing of PA/Al composite film, passivation treatment of the PA/Al composite film, pre-gluing of the PA/Al composite film and compounding of the PA/Al composite film and a CPP coated film. The process is simple, high-temperature thermocompression bonding and high-temperature curing storage processes are not needed, a production period is shortened, and energy and time are saved.

Description

technical field [0001] The invention relates to the technical field of packaging films for power batteries, and more specifically relates to a thermal compounding process for composite aluminum-plastic films for power batteries. Background technique [0002] Lithium-ion power batteries are known as the "green chemical energy" of the 21st century. They have been widely used in many fields such as 3C consumer electronics, power batteries, and energy storage. Aluminum-plastic film is a key material for soft-pack lithium-ion batteries. With high technological content, the performance of the aluminum-plastic film directly determines the quality of the lithium-ion battery. The aluminum-plastic film can be roughly divided into three layers: the inner layer is an adhesive layer, mostly made of polypropylene material, which plays the role of sealing and bonding, and the middle layer is aluminum foil, which can prevent the infiltration of water vapor from the outside of the battery an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B37/06B32B38/16B32B38/00
CPCB32B37/1284B32B37/06B32B38/162B32B38/164B32B38/0008B32B2037/243Y02E60/10
Inventor 陈汉城王桂彬熊泽民
Owner GUANGDONG ANDELI NEW MATERIALS CO LTD
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