Novel PVC/rubber composite micropore partition board

A PVC resin and separator technology, applied in the direction of electrical components, circuits, battery pack components, etc., can solve the problems of shortened battery cycle life, easy to be broken or broken, battery failure, etc., to achieve performance improvement, increase porosity and strength , Improve the effect of infiltration speed

Inactive Publication Date: 2011-07-20
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the volume of the plate will change during the charging and discharging cycle of the battery, if the volume of the separator cannot change accordingly, a gap will be formed between the plate and the separator, and the supporting effect of the separator on the active material on the plate will gradually disappear, thereby As a result, the active material gradually separates from the plate and enters the electrolyte, shortening the cycle life of the battery
In addition, the currently domestically produced separators made of PVC resin, especially those prepared after mixing with inorganic fillers, are brittle in texture and low in strength, and are easily broken or broken during transportation, assembly and use, which not only causes material damage waste, and can easily lead to rupture of the separator during the shock process of the battery, resulting in premature failure of the battery

Method used

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  • Novel PVC/rubber composite micropore partition board
  • Novel PVC/rubber composite micropore partition board
  • Novel PVC/rubber composite micropore partition board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh dry PVC paste resin 30.0%, chlorinated rubber 20% by weight, specific surface area is 150m 2 / g of hydrophilic nano fumed silica 45%, carbon black 5.0%. Disperse the mixed material into dimethylacetamide, adjust to a viscous liquid with a viscosity of 200,000 Pa.s, and shape it by extruding and calendering at room temperature to make a thin sheet with a thickness of 1.5 mm. After leaching in hot water at a temperature of 60°C, the shape is finalized, and then dried in an oven at 80°C.

Embodiment 2

[0042] Take by weighing 41.4% of the dry good PVC blending resin, 16.3% of the vinyl chloride resin, and the specific surface area is 260m 2 The mixture of hydrophobic nano fumed silica and 250-mesh attapulgite / g is 38.1%, and graphite is 4.2%. Disperse the mixed material into dimethylformamide, adjust to a viscous liquid with a viscosity of 156,000 Pa.s, and shape it by extruding and calendering at room temperature to make a thin sheet with a thickness of 1.0 mm. After leaching in hot water at a temperature of 60°C, the shape is finalized, and then dried in an oven at 80°C.

Embodiment 3

[0044] Take by weight proportion the PVC resin 53.7% that the degree of polymerization that has dried is 1500, chlorinated butyl rubber 13.3%, specific surface area is 190m 2 The mixture of hydrophobic nano fumed silica and 150-mesh precipitated silica / g is 29.6% (the mixing weight ratio is 1:1), and carbon nanofiber is 3.4%. Disperse the mixed material into dimethyl sulfoxide, adjust it to a viscous liquid with a viscosity of 127,000 Pa.s, and shape it by extruding and calendering at room temperature to make a thin sheet with a thickness of 2.4 mm. After leaching in hot water at a temperature of 60°C, the shape is finalized, and then dried in an oven at 80°C.

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Abstract

The invention discloses a novel polyvinyl chloride (PVC)/rubber composite micropore partition board. The composite micropore partition board is characterized by consisting of the following components in percentage by weight: 30 to 80 percent of PVC resin, 0.1 to 20 percent of rubber, 0 to 50 percent of inorganic filling phase and 0.1 to 5 percent of conductive agent. The PVC/rubber composite micropore partition board provided by the invention has compressibility and high strength of plastic and resilience and high toughness of rubber, has good response to the volume change of a polar plate in the charge/discharge process of a battery, can play a good durable role in supporting active substances on the polar plate, effectively controls the separation of the active substances, and remarkably prolongs the service life of the battery.

Description

technical field [0001] The invention relates to accumulators, in particular to composite resin separators for lead-acid accumulators. Background technique [0002] The separator is one of the main components of the battery, which plays the role of preventing short circuit of the battery, storing sulfuric acid electrolyte and maintaining elasticity. A high-quality separator should have the characteristics of high porosity, uniform thickness, strong acid resistance, good resilience and compressibility. At present, the commonly used lead-acid battery separators in my country are: PE type, PVC sintered type, PVC microporous type, and 10G type, among which 10G separators are the most commonly used. Although a 10G separator with a porosity as high as 92% to 94% can be made by using an ultrafine glass fiber membrane, the resilience and compressibility of the separator are low due to the low elasticity of the glass fiber. PVC is a typical plastic. As a separator material, its use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16
CPCY02E60/12Y02E60/10
Inventor 石光陈红雨秦炜
Owner SOUTH CHINA NORMAL UNIVERSITY
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