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Lithium ion battery soft package material and aluminum foil layer surface treating liquid thereof

A lithium-ion battery and surface treatment liquid technology, which is applied in the coating process of metal materials, secondary batteries, battery components, etc., can solve the problem of poor adhesion of glue on corrosion resistance, thick trivalent chromium coating, etc. problems, to achieve excellent corrosion resistance and gluing performance, excellent bonding performance and the effect of electrolyte resistance

Inactive Publication Date: 2019-03-08
浙江华正能源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the corrosion resistance of trivalent chromium agents for aluminum-plastic films on the market and the glue adhesion are generally inferior to hexavalent chromium. The obtained trivalent chromium coatings are generally thicker (1 μm) and the agent coating needs to be applied at a high temperature of 200 ° C. Therefore, improving the trivalent chromium agent has become an urgent problem to be solved for the aluminum-plastic film.

Method used

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  • Lithium ion battery soft package material and aluminum foil layer surface treating liquid thereof
  • Lithium ion battery soft package material and aluminum foil layer surface treating liquid thereof
  • Lithium ion battery soft package material and aluminum foil layer surface treating liquid thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 20g of chromium chloride, 10g of acrylamide-modified acrylic resin, 0.5g of sodium dodecylsulfonate, 3g of boric acid, 1g of sodium tartrate, 0.2g of sodium hydrogen fluoride, and 0.5g of hydroxymethylcellulose in water and set to volume to 1L to obtain a trivalent chromium treatment solution.

[0025] The aluminum foil was spray-coated with the above-mentioned treatment solution at a treatment temperature of 60° C. and a treatment time of 5 s. Then, the treated aluminum foil was taken out and placed in an oven at 50° C. for drying. Take a small amount of aluminum foil for neutral salt spray test, the specific standard refers to ASTM B117.

[0026] The treated aluminum foil is thermally laminated with nylon and CPP through the outer layer glue and the inner layer glue to obtain the lithium-ion battery soft package material (aluminum-plastic film).

[0027] The obtained aluminum-plastic film was cut into a sample strip with a width of 15 mm, and the mechanical ...

Embodiment 2

[0030] Dissolve 20g of chromium chloride, 10g of acrylamide-modified acrylic resin, 0.5g of sodium dodecylsulfonate, 3g of boric acid, 1g of sodium tartrate, 0.2g of sodium hydrogen fluoride, and 0.5g of hydroxymethylcellulose in water and set to volume to 1L to obtain a trivalent chromium treatment solution.

[0031] The aluminum foil was spray-coated with the above-mentioned treatment solution at a treatment temperature of 80° C. and a treatment time of 5 s. Then, the treated aluminum foil was taken out and placed in an oven at 50° C. for drying. Take a small amount of aluminum foil for neutral salt spray test, the specific standard refers to ASTM B117.

[0032] The treated aluminum foil is thermally laminated with nylon and CPP through the outer layer glue and the inner layer glue to obtain the lithium-ion battery soft package material (aluminum-plastic film).

[0033] The obtained aluminum-plastic film was cut into a sample strip with a width of 15 mm, and the mechanical ...

Embodiment 3

[0036] Dissolve 20g of chromium chloride, 10g of acrylamide-modified acrylic resin, 0.5g of sodium dodecylsulfonate, 3g of boric acid, 1g of sodium tartrate, 0.2g of sodium hydrogen fluoride, and 0.5g of hydroxymethylcellulose in water and set to volume to 1L to obtain a trivalent chromium treatment solution.

[0037] The aluminum foil was spray-coated with the above-mentioned treatment solution at a treatment temperature of 100° C. for 5 s. Then, the treated aluminum foil was taken out and placed in an oven at 50° C. for drying. Take a small amount of aluminum foil for neutral salt spray test, the specific standard refers to ASTM B117.

[0038] The treated aluminum foil is thermally laminated with nylon and CPP through the outer layer glue and the inner layer glue to obtain the lithium-ion battery soft package material (aluminum-plastic film).

[0039] The obtained aluminum-plastic film was cut into a sample strip with a width of 15 mm, and the mechanical properties of the s...

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Abstract

The invention discloses a lithium ion battery soft package material and aluminum foil layer surface treating liquid thereof. The lithium ion battery soft package composite material structurally comprises an outer layer, an outer layer bonding layer, a first trivalent chromium treating layer, an aluminum foil layer, a second trivalent chromium treating layer, an inner layer bonding layer and a CPPlayer in sequence; and a trivalent chromium reagent of the surface treating liquid is a compounded system of trivalent chromium and acrylic resin, and a layer of transparent trivalent chromium treating film can be formed on the aluminum foil surface. The aluminum foil layer surface treating liquid uses the environment-friendly trivalent chromium for replacing traditional hexavalent chromium and isparticularly suitable for surface treatment of an aluminum package material in a lithium battery soft package, the good electrolyte-corrosion-resistant property and adherence are provided, and the bonding property of the aluminum foil layer and the CPP layer is improved; and film forming can be quickly conducted through a spraying process under the normal temperature, and energy conservation andenvironmental friendliness are achieved.

Description

technical field [0001] The invention relates to an environment-friendly and energy-saving lithium battery soft pack trivalent chromium agent and a lithium battery soft pack composite material. Background technique [0002] Lithium-ion battery is a chemical power source widely used in electronic products, such as notebook computers, electric vehicles, mobile phones, electric toys, etc. It has high specific energy, long service life, high working voltage, small self-discharge, rechargeable Discharge, safety and environmental protection and other advantages. Since the beginning of the 21st century, the emergence of new energy vehicles, electric bicycles and the development of microelectronics technology have made the annual demand for lithium-ion batteries continue to grow, promoting the development of the lithium battery industry. [0003] Aluminum-plastic film flexible packaging materials refer to materials made by compounding aluminum foil, polymer resin and polymer adhesiv...

Claims

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Application Information

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IPC IPC(8): C23C22/34H01M2/02H01M10/0525H01M50/124
CPCH01M10/0525C23C22/34C23C2222/10H01M50/124Y02E60/10
Inventor 王泰钧夏旭峰孙剑飞张楚萱
Owner 浙江华正能源材料有限公司
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