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Battery box and manufacture method thereof

A manufacturing method and box body technology, applied in the direction of battery box/case material, battery pack parts, battery box/coating, etc., can solve problems such as difficult recycling, low mechanical properties, hidden safety hazards, etc., to reduce environmental pressure , high modulus, and high manufacturing efficiency

Active Publication Date: 2017-11-07
惠州市海龙新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among them, the cost of SMC materials is low, the molding efficiency is high, and the cost of the battery box can be well controlled, but the reinforcing material in SMC is a discontinuous fiber, which has problems such as relatively low mechanical properties and certain safety hazards. , The unsaturated resin or epoxy resin used in SMC is a thermosetting resin, which is difficult to recycle. With the extensive application of battery boxes, it will definitely cause serious environmental pressure in the future.

Method used

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  • Battery box and manufacture method thereof
  • Battery box and manufacture method thereof

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Experimental program
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Embodiment 1

[0060] The continuous fiber-reinforced thermoplastic resin matrix composite material is made of continuous glass fiber-reinforced PP prepreg sheet, and the fiber volume content is 50%. The discontinuous fiber reinforced thermoplastic resin is made of long glass fiber reinforced PP, and the fiber weight content is 40%.

[0061] The continuous glass fiber reinforced PP sheet is cut according to the designed shape by a laser cutting machine, and then paved and assembled. The thickness of the designed main structure is 2.5mm. Use an infrared heating device to preheat the assembled sheet to 160°C, the preheating time is 45s, quickly transfer the preheated sheet to a molding mold with a mold temperature of 150°C, and press the mold to form the main body of the battery box structure. Then use long glass fiber reinforced PP resin to injection mold the battery box assembly and rib structure, and the injection molding temperature is 245°C. After holding the pressure and cooling, the m...

Embodiment 2

[0063]Continuous fiber-reinforced thermoplastic resin-based composites are made of unidirectional carbon fiber-reinforced PA66 prepreg sheet and unidirectional glass fiber-reinforced PA66 prepreg sheet, both of which have a fiber volume content of 55%. Long glass fiber reinforced PA66 is selected as the discontinuous fiber reinforced thermoplastic resin, and the fiber weight content is 45%.

[0064] Use high-speed robot cutting equipment to cut unidirectional prepreg sheets according to the design requirements, and carry out paving and assembly. The inner surface of the box is made of glass fiber reinforced PA66 prepreg sheets, and the rest of the layers are made of carbon fiber reinforced PA66 prepreg sheets. , the thickness of the main structure of the designed battery box is 2.0mm. Electromagnetic heating is used to preheat the assembled thermoplastic sheet to 270°C, and the preheating time is 50s. The preheated sheet is quickly transferred to a molding mold with a mold tem...

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Abstract

The invention provides a battery box and a manufacture method thereof. The battery box comprises an upper cover and a lower box body, wherein the upper cover is arranged on the lower box body; the main body structure of the upper cover is made of a continuous fiber reinforced thermoplastic resin composite sheet through hot press molding, the edge splicing structure of the upper cover is made of a discontinuous fiber reinforced thermoplastic resin composite through in-mold continuous injection molding; the main body structure of the lower box body is made of a continuous fiber reinforced thermoplastic resin composite sheet through hot press manufacture, reinforcing rib structures and the edge splicing structure of the lower box body are made of discontinuous fiber reinforced thermoplastic resin composites through in-mold continuous injection molding. The battery box has the advantages of lighter weight, higher strength and stiffness, better shock resistance, high molding and manufacture efficiency and recyclable materials.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a battery case and a manufacturing method thereof. Background technique [0002] New energy vehicles are an important way to effectively alleviate the pressure on my country's energy and environment and promote the sustainable development of the automobile industry. Power batteries are the core components of new energy vehicles, and their performance directly affects the mileage and performance of new energy vehicles. As the carrier of the power battery, the battery box plays a key role in the safety and protection of the power battery. [0003] In the structural design of the battery box, many factors need to be considered, such as: vibration resistance, impact resistance, collision safety, sealing performance, anti-corrosion performance, stone impact resistance, lightweight and low cost. The power battery boxes of traditional electric vehicles are mostly made of metal mater...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M2/10H01M50/10H01M50/116H01M50/124H01M50/249
CPCH01M50/10H01M50/116H01M50/124H01M50/20Y02E60/10
Inventor 赵金华颜美聪颜志向
Owner 惠州市海龙新材料科技有限公司
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