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Composite material and lithium ion battery plastic shell made of the same

A composite material and mixture technology, used in battery pack parts, circuits, electrical components, etc., can solve the problems of reduced battery performance, insufficient, poor sealing, etc., and achieve the effect of strong toughness and impact resistance.

Inactive Publication Date: 2013-05-15
DONGGUAN RUNGUANG BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of sealing structure is too simple, and it is easy to have the problem of poor sealing in the industrial production process, which will reduce the performance of the battery.
[0003] The Chinese patent application number is 201110459943.7, and the patent name is composite plastics and lithium-ion batteries and battery packs made of them and their assembly methods. In this patent, composite reinforcing fillers and composite thermally conductive fillers have serious deficiencies in resisting electrolyte corrosion. The hydrofluoric acid in the liquid will react with the composite material, causing the battery case to fail

Method used

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  • Composite material and lithium ion battery plastic shell made of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of composite material: the steps are as follows,

[0022] (1) Mix and stir 80 parts by weight of polypropylene, 15 parts of high-density polyethylene and 5 parts of lubricant until uniform;

[0023] (2) Put the uniformly stirred mixture into a screw extruder for melt mixing for 2-4 minutes, the screw temperature is 145°C-210°C, and the screw speed is 200-300 rpm.

[0024] The lithium-ion battery plastic casing made of composite materials, the manufacturing steps are as follows:

[0025] The composite material prepared according to the above method is blended with the acid and alkali resistant color masterbatch in proportion, baked, and then injected through an injection mold. Use a horizontal mixer to stir at a constant speed for 5-10 minutes to disperse the color masterbatch in the raw materials evenly; bake the mixed raw materials at 75°C for 2 hours before hot injection molding;

[0026] The hot injection molding conditions are: injection mol...

Embodiment 2

[0028] The preparation method of composite material: the steps are as follows,

[0029] (1) Mix and stir 86 parts by weight of polypropylene, 10 parts of high-density polyethylene and 4 parts of lubricant until uniform;

[0030] (2) Put the uniformly stirred mixture into a screw extruder for melt mixing for 2-4 minutes, the screw temperature is 145°C-210°C, and the screw speed is 200-300 rpm.

[0031] The lithium-ion battery plastic casing made of composite materials, the manufacturing steps are as follows:

[0032] The composite material prepared according to the above method is blended with the acid and alkali resistant color masterbatch in proportion, baked, and then injected through an injection mold. Use a horizontal mixer to stir at a constant speed for 5-10 minutes to disperse the color masterbatch in the raw materials evenly; bake the mixed raw materials at 75°C for 2 hours before hot injection molding;

[0033] The hot injection molding conditions are: injection mol...

Embodiment 3

[0035] The preparation method of composite material: the steps are as follows,

[0036] (1) Mix and stir 90 parts by weight of polypropylene, 7 parts of high-density polyethylene and 3 parts of lubricant until uniform;

[0037] (2) Put the uniformly stirred mixture into a screw extruder for melt mixing for 2-4 minutes, the screw temperature is 145°C-210°C, and the screw speed is 200-300 rpm.

[0038] The lithium-ion battery plastic casing made of composite materials, the manufacturing steps are as follows:

[0039] The composite material prepared by the method according to claim 4 is blended with the acid and alkali resistant color masterbatch in proportion, baked, and then injected through an injection mold. Use a horizontal mixer to stir at a constant speed for 5-10 minutes to disperse the color masterbatch in the raw materials evenly; bake the mixed raw materials at 75°C for 2 hours before hot injection molding;

[0040] The hot injection molding conditions are: injection...

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Abstract

Relating to the field of battery manufacturing, the invention discloses a composite material and a lithium ion battery plastic shell made of the composite material. The composite material is prepared by mixing the following components by weight: 80%-90% of polypropylene PP; 7%-15% of high density polyethylene HDPE; and 3%-5% of a lubricant. The preparation method of the packaging composite material consists of: (1) mixing and stirring the polypropylene, the high density polyethylene and the lubricant to a uniform state; and (2) placing the uniformly stirred mixture into a screw extruder to perform melt mixing for 2-4min, and controlling the screw temperature at 145DEG C-210DEG C and the screw rotation speed at 200-300rpm. The composite material prepared by the method and an acid and alkali resistant color masterbatch are subjected to blending and baking in proportion, and then subjected to injection molding through an injection mold. The lithium ion battery plastic shell made of the composite material provided in the invention has obdurability and shock resistance.

Description

technical field [0001] The invention relates to the field of battery manufacturing, in particular to a composite material and a lithium ion battery plastic case made of the composite material. Background technique [0002] For lithium-ion batteries, the sealing degree of the battery directly affects the performance of the battery. In the process of sealing various parts of the lithium-ion battery, the sealing of the battery cover at the terminal post is the most critical; the existing lithium-ion battery is generally used to first punch the battery cover on the battery cover to seal the battery cover at the terminal post. A terminal post hole, and then a sealing gasket made of polypropylene PP or polyethylene PE material is arranged above and below the hole. However, this sealing structure is too simple, and the problem of poor sealing is very likely to occur in the industrial production process, which will further reduce the performance of the battery. [0003] The Chines...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06B29C45/76H01M2/02
CPCY02E60/12Y02E60/10
Inventor 陈演中
Owner DONGGUAN RUNGUANG BATTERY TECH
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