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

A technology of power battery and dry compounding, which is applied in the direction of chemical instruments and methods, lamination auxiliary operation, lamination, etc., can solve the problems of poor weather resistance, lithium intolerance, easy moisture absorption, etc., and achieve excellent mechanical properties and low production cost. The effect of low and low temperature environment requirements

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, the dry process is mainly used to produce composite aluminum-plastic film for power batteries. The dry composite process is relatively simple, the product yield is high, and the product has good stamping performance. The cold forming can reach 9-12mm, which is suitable for large capacity. , Large-volume power battery packaging, but there are still defects of poor weather resistance, it is difficult to meet the requirements of long-term use, and the compounding of aluminum foil and nylon layer in the prior art is mostly realized by acrylate adhesive, which is easy to absorb moisture And the shortcomings of the electrolyte that is not resistant to lithium batteries

Method used

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

Examples

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Effect test

Embodiment 1

[0033] A dry composite process for a composite aluminum-plastic film for a power battery, comprising the following steps:

[0034] (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;

[0035] (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 nylon / aluminum foil composite film;

[0036] (3) Curing of nylon / aluminum foil compo...

Embodiment 2

[0042] A dry composite process for a composite aluminum-plastic film for a power battery, comprising the following steps:

[0043] (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;

[0044] (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 nylon / aluminum foil composite film;

[0045] (3) Curing of nylon / aluminum foil composite...

Embodiment 3

[0051] A dry composite process for a composite aluminum-plastic film for a power battery, comprising the following steps:

[0052] (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;

[0053] (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 nylon / aluminum foil composite film;

[0054] (3) Curing of nylon / aluminum foil composite...

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Abstract

The invention discloses a dry compounding process of a composite aluminum-plastic film used for a power battery. The method comprises the steps of pretreatment of an aluminum foil, dry compounding ofnylon and the aluminum foil, curing of a nylon / aluminum foil composite film, passivation treatment of the nylon / aluminum foil composite film, pre-gluing of the nylon / aluminum foil composite film and dry compounding of the nylon / aluminum foil composite film and a polypropylene film. The method for preparing the composite aluminum-plastic film prepared is simple in preparation process and high in product yield, and the prepared composite aluminum-plastic film is good in punch forming performance and excellent in weather resistance and can meet the use requirement for long service life requirement of a power lithium battery.

Description

technical field [0001] The invention relates to the technical field of packaging films for power batteries, and more specifically relates to a dry composite 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 and prev...

Claims

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Application Information

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