Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Flexible flame-retardant filler and secondary battery

A flame retardant filling, secondary battery technology, applied in secondary batteries, batteries, battery pack components, etc., can solve problems such as reducing battery performance, reduce the occurrence of combustion accidents, reduce external impact, and quickly block oxidation reactions Effect

Inactive Publication Date: 2021-12-07
HAIKE GRP RES INST OF INNOVATION & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this stage, the flame retardant of lithium-ion batteries in the industry is mainly achieved by adding flame-retardant electrolyte additives to the electrolyte. However, flame-retardant electrolyte additives will react with positive and negative materials or substances in the electrolyte. , reducing the performance of the battery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flexible flame-retardant filler and secondary battery
  • Flexible flame-retardant filler and secondary battery
  • Flexible flame-retardant filler and secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] see image 3 , image 3 It is a schematic cross-sectional schematic diagram of a single battery cell of the lithium-ion battery structure provided by the present invention. Among them, 1-lithium ion battery, 2-battery shell, 3-flame retardant filler.

[0080] see Figure 4 , Figure 4 It is a top view schematic diagram of the structure of the lithium-ion battery containing the flexible flame retardant provided by the present invention. Among them, 1-lithium ion battery, 2-battery shell, 3-flame retardant filler.

[0081] In the 5Ah pouch battery, the flame retardant is magnesium hydroxide [Mg(OH) 2 ] as an example, the rheological additive is polyethylene oxide, the mass ratio of the flame retardant to the rheological additive is 1:2.5, and the magnesium hydroxide [Mg(OH) 2 ] mixed with polyethylene oxide and stirred for 2 hours, and its viscosity was tested with a rotational viscometer. When the viscosity value reached or approached 13500mPa·s, the flame retardan...

Embodiment 2

[0089] In a 5Ah soft pack battery, the flame retardant is aluminum hydroxide as an example, the rheological additive is fumed silica, the mass ratio of the flame retardant to the rheological additive is 1:2.4, and then polyurethane thickener is added Accounting for about 1 / 4 of the total proportion, the mixture was stirred for 2 hours, and its viscosity was tested with a rotational viscometer. When the viscosity value reached or approached 14500mPa·s, a gel state flame retardant was obtained.

[0090] The gel is then filled into a battery pack with an aluminum casing, and after being slightly solidified, the pouch battery containing the flexible flame-retardant filling prepared by the present invention is obtained. Aluminum hydroxide releases water of crystallization when it is decomposed by heat. This process is a strong endothermic reaction, which absorbs a large amount of heat and can cool the polymer. At the same time, the water vapor generated by the reaction can dilute t...

Embodiment 3

[0095] In a 5Ah soft pack battery, the flame retardant is zinc borate as an example, the rheological additive is modified polyurea, the mass ratio of the flame retardant to the rheological additive is 1:2.6, and the polyurethane thickener is added for about Accounting for 1 / 5 of the total ratio, the mixture was stirred for 2 hours, and its viscosity was tested with a rotational viscometer. When the viscosity value reached or approached 14000mPa·s, a gel state flame retardant was obtained.

[0096] The gel is then filled into a battery pack with an aluminum casing, and after being slightly solidified, the pouch battery containing the flexible flame-retardant filling prepared by the present invention is obtained. Zinc borate has a synergistic effect, which can effectively reduce the cost of materials, the amount of smoke generated during combustion, and promote the formation of charcoal layers without reducing the flame retardant grade of materials. The layer can be stabilized b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention provides a flexible flame-retardant filler. The flexible flame-retardant filler consists of a flame retardant and a rheological additive, wherein the mass ratio of the flame retardant to the rheological additive is 1: (2-3); and the flexible flame retardant is a gel state flexible flame retardant. The flexible flame-retardant filler is used for being filled between a battery pack shell and each battery core, the battery style is not limited to the shape, and the problems of combustion and the like caused by too high temperature and the like in the battery are solved. When the battery burns due to the problems of short circuit and the like, the battery reacts with a flame-retardant gel mixture of the flexible flame-retardant filler to absorb heat in the battery pack, block diffusion of the heat and reduce the oxidation reaction, so that a self-extinguishing effect in the battery pack is achieved, and the safety and the stability of the battery are improved. In addition, the flexible flame-retardant filler has flexibility, so that the effects of buffering, reducing external impact and internal vibration and the like during use of the battery are achieved; and meanwhile, a preparation method is simple in process, easy to operate and suitable for large-scale industrial production and application.

Description

technical field [0001] The invention belongs to the technical field of flame retardant materials for lithium ion batteries, and relates to a flexible flame retardant filler and a secondary battery, in particular to a flexible flame retardant filler and a secondary battery containing a high flame retardant flexible filler battery pack. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high voltage, long life, and no memory effect. According to different application scenarios, lithium-ion batteries are mainly divided into three categories: power, consumption, and energy storage. Traditional consumer batteries are mainly used in electronic products such as mobile phones and computers. With the gradual rise of the new energy vehicle market, the demand for power has become a strong growth point in the battery industry. The demand for products has become a trend of heavy volume. Currently, in my country , The power battery market has gr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A62C3/16H01M50/242H01M50/24H01M50/249H01M10/0525H01M10/625H01M10/643H01M10/658
CPCA62C3/16H01M10/0525H01M10/625H01M10/643H01M10/658H01M2200/00H01M2220/20Y02E60/10
Inventor 张琪马俊青
Owner HAIKE GRP RES INST OF INNOVATION & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com