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A kind of high strength agm separator

A high-strength, separator technology, applied in the direction of structural parts, electrical components, battery pack components, etc., can solve problems affecting the uniformity of separator apertures, uneven distribution of separator apertures, chronic short-circuiting of batteries, etc., and achieve raw material formulation Optimization, good mechanical strength and heat dissipation performance, and the effect of extending battery life

Active Publication Date: 2018-11-20
ZHEJIANG CHANGTONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the separator improves the tensile strength, after the polyolefin resin is melted, the pore size distribution of the separator will be uneven, which will affect the consistency of the pore size of the separator. Through the separator to the side of the negative electrode, and the lead dendrites of the negative electrode may penetrate the separator, and finally cause the battery to be chronically short-circuited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-strength AGM separator, which is made of the following mass percentage components: 1% modified nano silicon nitride, 3% polyethylene oxide, 5% modified basalt mineral fiber, 10% diameter of 1μm, Water-soluble polyvinyl alcohol fiber with a length of 3mm, 30% high-alkali glass fiber with a diameter of 0.5μm and a length of 3mm, the balance is a high-alkali glass fiber with a diameter of 3μm and a length of 3mm, in which the modified nano silicon nitride passes the following Prepared by the method: adding nano-silicon nitride to the modification solution after ultrasonic dispersion, filtering and drying to obtain modified nano-silicon nitride. The modification solution is composed of the following mass percentage components: 40% polytetrafluoroethylene Ethylene dispersion emulsion, 0.1% quaternary ammonium salt, 0.3% polyoxyethylene stearate, 0.1% silane coupling agent KH-550, the balance is water; modified basalt mineral fiber is prepared by the following method: th...

Embodiment 2

[0020] A high-strength AGM separator, which is made of the following components by mass percentage: 2% modified nano silicon nitride, 4% polyethylene oxide, 7% modified basalt mineral fiber, 12% with a diameter of 2μm, The water-soluble polyvinyl alcohol fiber with a length of 4mm, 32% of the high-alkali glass fiber with a diameter of 0.6μm and a length of 4mm, the remainder is a high-alkali glass fiber with a diameter of 3.5μm and a length of 4mm, in which the modified nano silicon nitride passes It is prepared by the following method: adding nano-silicon nitride to the modification solution after ultrasonic dispersion, filtering and drying to obtain modified nano-silicon nitride, the modification solution is composed of the following mass percentage components: 42% polytetrafluoroethylene Vinyl fluoride dispersion emulsion, 0.15% quaternary ammonium salt, 0.4% polyoxyethylene stearate, 0.2% silane coupling agent KH-550, the balance is water; modified basalt mineral fiber is pr...

Embodiment 3

[0022] A high-strength AGM separator, which is made of the following components by mass percentage: 3% modified nano silicon nitride, 5% polyethylene oxide, 10% modified basalt mineral fiber, 15% diameter of 3μm, Water-soluble polyvinyl alcohol fiber with a length of 5mm, 35% high-alkali glass fiber with a diameter of 0.7μm and a length of 5mm, the balance is a high-alkali glass fiber with a diameter of 4μm and a length of 5mm, in which the modified nano-silicon nitride passes the following Prepared by the method: adding nano silicon nitride to the modification solution after ultrasonic dispersion, filtering and drying to obtain modified nano silicon nitride. The modification solution is composed of the following mass percentage components: 50% polytetrafluoroethylene Ethylene dispersion emulsion, 0.2% quaternary ammonium salt, 0.5% polyoxyethylene stearate, 0.3% silane coupling agent KH-550, the balance is water; modified basalt mineral fiber is prepared by the following method...

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Abstract

A high-strength AGM separator plate is disclosed. The separator plate is prepared from, by mass, 1-3% of modified nanometer silicon nitride, 3-5% of polyoxyethylene, 5-10% of modified basalt mineral fibres, 10-15% of water-soluble poly(vinyl alcohol) fibers, and 30-35% of high-alkalinity glass fibers the diameter of which is 0.5-0.7 mum, with the balance being high-alkalinity glass fibers the diameter of which is 3-4 mum. A traditional pure glass fiber formula is abandoned, and a raw material formula of the separator plate is optimized. The separator plate is scientific and reasonable in formula, good in mechanical strength and heat radiation performance, fine and uniform in pore size, proper in porosity, and capable of effectively preventing short circuits of cells and facilitating prolongation of lifetimes of cells.

Description

Technical field [0001] The present invention relates to the technical field of storage batteries, in particular to a high-strength AGM separator. Background technique [0002] Glass microfiber separator (AGM) is one of the key materials of valve-regulated lead-acid batteries. The main functions of AGM separators for valve-regulated lead-acid batteries are: (1) Prevent the positive / negative plates from contacting each other and generate inside the battery Short-circuit; (2) tightly assemble the battery and reduce the battery volume; (3) prevent the deformation, bending of the electrode plates and the shedding of active materials; (4) store the necessary amount of electrolyte in the porous separator between the electrode plates to To ensure higher conductivity and the need for battery reaction; (5) Prevent the migration and diffusion of some harmful substances to the battery through the separator. Therefore, the AGM separator has the name of the third electrode of the valve-regula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16
CPCH01M50/411H01M50/431H01M50/44H01M50/446Y02E60/10
Inventor 陈连强黄建忠郑书根应志超
Owner ZHEJIANG CHANGTONG SCI & TECH
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