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Battery package material, preparation method thereof, battery pack sealing cover, battery pack body, power battery and electric vehicle

A technology of packaging materials and battery packs, which is applied in the fields of power batteries and electric vehicles, battery packaging materials and their preparation, battery pack sealing covers, and battery pack bodies. , low cost, light weight effect

Active Publication Date: 2017-12-08
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of heavy weight, high cost, no insulation, or unsafety of battery packaging materials in the prior art, the present invention provides a light weight, low cost, insulation, and especially safer battery packaging material, and its preparation Method and battery pack sealing cover, battery pack body, power battery and electric vehicle prepared therefrom

Method used

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  • Battery package material, preparation method thereof, battery pack sealing cover, battery pack body, power battery and electric vehicle
  • Battery package material, preparation method thereof, battery pack sealing cover, battery pack body, power battery and electric vehicle
  • Battery package material, preparation method thereof, battery pack sealing cover, battery pack body, power battery and electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] For example, purchased commercially available square batteries are arranged in parallel or in series according to the layout or functional requirements of electric vehicles. The lower part of the battery adopts a load-bearing structure such as a tray 2, and the upper layer is sealed with a battery pack sealing cover 1. The upper and lower layers are sealed by mechanical connection to realize the functions of sealing, insulating and protecting the internal battery. In this embodiment, glass fiber and carbon fiber are mixed to form a mesh, and the glass fiber is 20um in diameter, which is twisted by 3000 fiber filaments to form a glass fiber bundle; the fiber diameter of carbon fiber filament is 6um, twisted by 8000 carbon fiber filaments The carbon fiber bundles are formed, and the two are cross-arranged into a network to form a fiber layer with a thickness of 1.3 mm. The network fiber layer is immersed in a mixed slurry of water-based polyurethane resin and polystyrene w...

Embodiment 2

[0037] Adopt the same method as in Example 1 to prepare a power battery, the difference is that the glass fiber is mixed to form a mesh, and the glass fiber adopts a glass fiber filament with a diameter of 25um, and is twisted by 5000 fiber filaments to form a glass fiber bundle; the glass fiber bundle crosses Arranged in a net shape, the thickness of the fiber layer is 1.5mm.

Embodiment 3

[0039] A power battery was prepared by the same method as in Example 1, except that the binder was epoxy resin (the glass softening temperature was 80° C.).

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Abstract

The invention provides a battery package material, a preparation method thereof, a battery pack sealing cover, a battery pack body, a power battery and an electric vehicle. The battery package material comprises a fiber layer, a mesh structure is contained in the fiber layer, and adhesives are filled in holes of the mesh structure. The battery package material is light in weight and low in cost, is insulated, and particularly is safer, and the safer battery pack sealing cover, the battery pack body, the power battery and the electric vehicle can be prepared.

Description

technical field [0001] The invention relates to the field of batteries, in particular to the field of power batteries used in electric vehicles, and in particular to a battery packaging material and a preparation method thereof, a battery pack sealing cover, a battery pack body, a power battery and an electric vehicle. Background technique [0002] As an energy storage unit, batteries play an important role in all walks of life. For example, power batteries are widely used in new energy vehicles and other fields. The battery pack of the power battery can have multiple single batteries connected in series to form a battery module to realize charging. Discharge work. Among them, during the charging and discharging process of the power battery, BMS (battery management system) is usually used to monitor the changes of voltage and current to calculate the state of charge. If there is a problem with the voltage sampling, it may lead to overcharging of the battery, especially for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M50/117H01M50/121H01M50/122H01M50/124H01M50/133H01M50/20H01M50/204H01M50/24H01M50/276H01M50/278H01M50/28H01M50/282
CPCH01M50/24H01M50/133H01M50/278H01M50/117H01M50/28H01M50/122H01M50/204H01M50/124H01M50/121H01M50/282H01M50/276B32B5/02B32B5/12B32B9/047B32B15/02B32B27/04B32B27/20Y02E60/10B32B5/024B32B5/028B32B2262/101B32B2262/106B32B2457/10H01M2220/20
Inventor 谭晶郑卫鑫朱燕沈晞
Owner BYD CO LTD