A kind of production method of high-strength AGM clapboard

A production method and high-strength technology, applied in electrochemical generators, structural parts, secondary battery repair/maintenance, etc., can solve the problem that the thickness of the separator is not well controlled, affecting the consistency of the aperture of the separator, glass The fiber is not easy to disperse and other problems, so as to avoid chronic short circuit, low production cost and good mechanical strength

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

In this preparation method, the glass fiber is not easy to disperse and flocculate when beating, and the uniformity of the prepared separator is poor; the slurry cannot be well stabilized due to the vacuum negative pressure during the forming and papermaking process, resulting in the thickness of the separator. If the control is very good, the uniformity of the thickness of the obtained separator is poor; after the polyolefin resin is melted, it will cause uneven distribution of the aperture of the separator, which will affect the uniformity of the aperture of the separator, and the negative electrode lead dendrite may penetrate the separator, resulting in battery chronic short circuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of modified nano-silicon nitride: Add nano-silicon nitride to the modified liquid and ultrasonically disperse, filter and dry to obtain modified nano-silicon nitride. The modified liquid consists of the following components by mass percentage Composition: 50% polytetrafluoroethylene dispersion emulsion, 0.2% quaternary ammonium salt, 0.5% polyoxyethylene stearate, 0.3% silane coupling agent KH-550, and the balance is water;

[0030] (2) Preparation of modified basalt mineral fibers: Add basalt mineral fibers with a diameter of 3 μm and a length of 3 mm into chlorosulfonic acid, heat to 100°C to swell for 3 hours, cool, filter, wash the filtrate with water until the pH is neutral, and dry in vacuum , and then added to the sizing agent for soaking for 60 minutes and then dried at 105°C to obtain the modified basalt mineral fiber. The sizing agent is composed of the following components by mass percentage: 5% epoxy resin emulsion, 0.5% polyurethane emulsion,...

Embodiment 2

[0038] (1) Preparation of modified nano-silicon nitride: Add nano-silicon nitride to the modified liquid and ultrasonically disperse, filter and dry to obtain modified nano-silicon nitride. The modified liquid consists of the following components by mass percentage Composition: 40% polytetrafluoroethylene dispersion emulsion, 0.1% quaternary ammonium salt, 0.3~0.5% polyoxyethylene stearate, 0.1% silane coupling agent KH-550, and the balance is water;

[0039] (2) Preparation of modified basalt mineral fibers: add basalt mineral fibers with a diameter of 1 μm and a length of 1 mm into chlorosulfonic acid, heat to 80°C to swell for 1 hour, cool, filter, wash the filtrate with water until the pH is neutral, and dry in vacuum , and then added to the sizing agent for soaking for 30 minutes and then dried at 95°C to obtain modified basalt mineral fiber. The sizing agent is composed of the following components by mass percentage: 3% epoxy resin emulsion, 0.3% polyurethane emulsion, 0....

Embodiment 3

[0047] (1) Preparation of modified nano-silicon nitride: Add nano-silicon nitride to the modified liquid and ultrasonically disperse, filter and dry to obtain modified nano-silicon nitride. The modified liquid consists of the following components by mass percentage Composition: 45% polytetrafluoroethylene dispersion emulsion, 0.15% quaternary ammonium salt, 0.4% polyoxyethylene stearate, 0.2% silane coupling agent KH-550, and the balance is water;

[0048] (2) Preparation of modified basalt mineral fibers: Add basalt mineral fibers with a diameter of 2 μm and a length of 2 mm into chlorosulfonic acid, heat to 90°C to swell for 2 hours, cool, filter, wash the filtrate with water until the pH is neutral, and vacuum After drying, soak in the sizing agent for 40 minutes and then dry at 100°C to obtain the modified basalt mineral fiber. The sizing agent is composed of the following components by mass percentage: 4% epoxy resin emulsion, 0.4% polyurethane emulsion, 0.4 % silane coup...

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Abstract

The invention discloses a production method of a high-strength AGM partition plate. The production method comprises the following steps of (1) preparation of modified nanometer silicon nitride; (2) preparation of modified basalt mineral fiber; (3) material preparation; (4) pulping; (5) papermaking and forming; (6) primary drying; (7) rolling; and (8) secondary drying. The production method of the high-strength AGM partition plate is simple in step, low in production cost and high in maneuverability, the produced partition plate is high in mechanical strength and heat dissipation performance, fine and uniform in aperture and moderate in porosity size, and lead dendrite can be prevented from penetrating through the partition plate to cause chronic short circuit.

Description

technical field [0001] The invention relates to the technical field of production of AGM partitions, in particular to a production method of high-strength AGM partitions. 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) to prevent positive / negative plates from contacting each other and causing internal damage to the battery. short circuit; (2) make the battery tightly assembled and reduce the battery volume; (3) prevent the plate from being deformed, bent and active material from falling off; (4) store a necessary amount of electrolyte in the porous separator between the plates to To ensure high conductivity and the need for battery reaction; (5) to prevent some substances harmful to the battery from migrating and diffusing through the separator. Therefore, the AGM separator is called the third electrode of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M10/42H01M10/613H01M10/654B82Y30/00
CPCB82Y30/00H01M10/4235H01M10/613H01M10/654H01M50/403Y02E60/10
Inventor 陈连强黄建忠郑书根应志超
Owner ZHEJIANG CHANGTONG SCI & TECH
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