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

Heat activated microporous membrane and its application in battery

A microporous membrane and battery technology, applied in the field of microporous membranes, can solve the problems of variable battery quality, low battery high-current charge and discharge performance, serious problems, etc.

Inactive Publication Date: 2005-09-14
POLICELL TECH
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this will lead to a decrease in the high-current charge and discharge performance of the battery.
In addition, the adhesion between the separator and the electrodes is not strong, so the quality of the battery is easy to change
Especially for batteries with large sizes like those that can be used in electric vehicles, the situation will be more serious

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
  • Heat activated microporous membrane and its application in battery
  • Heat activated microporous membrane and its application in battery
  • Heat activated microporous membrane and its application in battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A microporous membrane was prepared as follows. 0.90 g of poly(ethylene-vinyl acetate) "PEVA-50" containing 50% vinyl acetate, 0.36 g of Escorez® 2596 (aromatized modified aliphatic hydrocarbon resin), and 4.14 g of polysulfone (Mw. 80,000) produced by Scientific Polymer Products (Ontario, NY) were dissolved in 40 g of tetrahydrofuran "THF". Another 1.00 g of fumed silica was added to the above solution. After stirring overnight, 7.00 g of lithium bromide "LiBr" was added to the resulting slurry. After the lithium bromide had completely dissolved, the slurry was coated directly onto a 4 inch by 15 inch Mylar(R) (polyethylene terephthalate) film support at room temperature. Coating thickness is controlled at about 200 microns. The whole pot of slurry can coat 10 pieces. At room temperature, tetrahydrofuran evaporates within about half an hour. After the tetrahydrofuran was completely volatilized, the obtained membrane was immediately soaked in water for 1 hour. The...

Embodiment 2

[0042] This sample is listed in Table 1, Sample No. 2. It was prepared according to the method of Example 1 above with the same formulation and substantially the same materials. The difference was that Escorez(R) 5690 (cycloaliphatic hydrocarbon resin) manufactured by Exxon-Mobil Chemical Company (Houston, TX) was used in place of Escorez(R) 2596 (aromatized aliphatic hydrocarbon resin).

Embodiment 3

[0044] Sample No. 3 was prepared from substantially the same slurry as in Example 2. The difference is that "PEVA-50" is replaced by poly(ethylene-vinyl acetate) "PEVA-70" containing 70% vinyl acetate.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

PROBLEM TO BE SOLVED: To provide a porous membrane for use in fabricating a storage battery, and to provide a method for manufacturing the same.SOLUTION: The porous membrane comprises: (a) a hot melt adhesive agent such as poly(ethylene-vinyl acetate) or a poly(ethylene-alkyl acrylate) (b) an engineering plastic such as polysulfone, polycarbonate, or poly(styrene-methyl methacrylate). The membrane may also contain as required: (c) an adhesiveness providing agent such as an aromatically modified aliphatic hydrocarbon resin, aliphatic resin, hydrogenated alicyclic hydrocarbon resin, rosin resin, polyterpene resin, or PVdF-HFP; and / or (d) a filler such as fumed silica, alumina, titanium dioxide, molecular sieve, calcium carbonate, calcium silicate, glass, ceramic material, or polytetrafluoroethylene. The membrane is bonded to battery electrodes by thermal activation at approximately 35-125 °C and approximately 0.5-100 psi.

Description

[0001] The priority of this patent application is based on two US patent applications, Ser. Nos. 10 / 034,388 and 10 / 034,494. Field of the invention [0002] The invention relates to a microporous membrane and a production method of the microporous membrane. More specifically, the present invention relates to the application of the microporous membrane in batteries. In the particular case of the present invention, microporous membranes are separators for batteries. Background of the invention [0003] Electric vehicles such as cars, buses and trucks do not emit any exhaust gas into the atmosphere and therefore do not pollute the environment. The energy used to drive this electric locomotive is a set of batteries. In addition to the batteries themselves, the battery pack also includes a charger that can be charged directly from a normal AC power source. However, the range that such electric scooters can travel on a charge is currently limited. The reason is that the energy ...

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 Patents(China)
IPC IPC(8): C08J9/26B29C70/00C08J5/22H01M2/14H01M2/16
CPCY02E60/12Y02E60/10
Inventor 孙录应
Owner POLICELL 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