Method for preparing flame-retardant plastic shells for lead-acid storage batteries

A lead-acid battery and plastic case technology is applied in the field of preparation of flame-retardant plastic case for lead-acid batteries, which can solve the problems of poor performance such as performance landslide, chemical stability, poor mechanical properties, etc., and achieve high tensile strength and bending mold. Quantity, good thermal stability, good high voltage resistance

Inactive Publication Date: 2018-02-16
ZHEJIANG CHANGTONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, ABS resin is often used as a raw material for the lead-acid battery plastic case, and the lead-acid battery plastic case is made by injection molding, but the weather resistance and chemical stability of the ABS resin are poor, and the flame retardancy is poor. The performance is also poor. After a period of use, there will be a sharp decline in performance, mechanical properties will deteriorate, materials will become hard and brittle, and there will even be dangers such as deflagration. It is difficult to meet the relevant requirements of current lead-acid battery manufacturing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a flame-retardant plastic case of a lead-acid battery, comprising the following steps:

[0036] a) Preparation of modified brucite: Add brucite to a modifier that is 1 times the weight of brucite and ultrasonically treat it for 20 minutes, and then dry it at 40°C to obtain modified brucite; brucite is fiber brucite;

[0037]b) Preparation of modified mica: crush the mica to 40 μm and put it into a hydrochloric acid solution with 3 times the weight of mica, sonicate it for 30 minutes, wash it with water and dry it, and then add the treated mica to a concentration of 1.0wt%. In the acetone solution of silane coupling agent KH550, ultrasonically treat for 1 hour, filter and dry to obtain modified mica;

[0038] c) Preparation of modified composite flame retardant: Soak diatomaceous earth in hydrochloric acid solution and water for 30 minutes respectively and dry, then add it to saturated sodium bicarbonate solution at 25°C, ultrasonically disperse a...

Embodiment 2

[0044] A method for preparing a flame-retardant plastic case of a lead-acid battery, comprising the following steps:

[0045] a) Preparation of modified brucite: add brucite to a modifier that is 1.5 times the weight of brucite and treat it ultrasonically for 25 minutes, then dry at 45°C to obtain modified brucite; brucite is fiber brucite;

[0046] b) Preparation of modified mica: crush the mica to 45 μm and put it into a hydrochloric acid solution with 3 times the weight of mica, sonicate for 35 minutes, wash with water and dry, then add the treated mica to a concentration of 1.2wt% In the acetone solution of silane coupling agent KH550, ultrasonically treat for 1.5 hours, filter and dry to obtain modified mica;

[0047] c) Preparation of modified composite flame retardant: Soak diatomaceous earth in hydrochloric acid solution and water for 35 minutes respectively and dry, then add it to saturated sodium bicarbonate solution at 27°C, ultrasonically disperse and dry the wate...

Embodiment 3

[0053] A method for preparing a flame-retardant plastic case of a lead-acid battery, comprising the following steps:

[0054] a) Preparation of modified brucite: Add brucite to a modifier that is 1.5 times the weight of brucite and treat it ultrasonically for 35 minutes, then dry at 45°C to obtain modified brucite; brucite is fiber brucite;

[0055] b) Preparation of modified mica: crush the mica to 45 μm and put it into a hydrochloric acid solution with 3 times the weight of mica, sonicate it for 35 minutes, wash it with water and dry it, and then add the treated mica to a concentration of 1.3wt%. In the acetone solution of silane coupling agent KH550, ultrasonically treat for 1.5 hours, filter and dry to obtain modified mica;

[0056] c) Preparation of modified composite flame retardant: Soak diatomaceous earth in hydrochloric acid solution and water for 35 minutes respectively and dry, then add it to saturated sodium bicarbonate solution at 28°C, ultrasonically disperse an...

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Abstract

The invention belongs to the technical field of lead-acid storage batteries, and discloses a method for preparing flame-retardant plastic shells for lead-acid storage batteries. The method includes steps of preparing modified brucite; preparing modified mica; preparing modified composite flame retardants; mixing raw materials with one another; carrying out injection molding and the like. Sodium bicarbonate is loaded on diatomaceous earth to obtain the composite flame retardants. The method has the advantages that the prepared plastic shells for the lead-acid storage batteries are high in mechanical strength and impact-resistant strength; the flame-retardant plastic shells are good in toughness and high in tensile strength and bending modulus; the flame-retardant plastic shells are good inflame-retardant property, and the flame-retardant properties of the flame-retardant plastic shells are far higher than requirements on flame-retardant properties of plastics in national standards; theflame-retardant plastic shells are excellent in heat stability and good in high-voltage-resistant performance.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries. In particular, it relates to a method for preparing a flame-retardant plastic case of a lead-acid battery. Background technique [0002] After more than 100 years of development, the related technologies of lead-acid batteries have become mature and the cost is relatively low. They are widely used in many economic fields such as transportation, communication, electric power, military, and navigation, and become an indispensable chemical power source. As an important part of the lead-acid battery, the plastic case of the lead-acid battery plays the role of carrying the important parts of the battery such as the plate, the separator and the electrolyte. It is required to have good chemical corrosion resistance, high stability, high Strength and good machinability. [0003] In the prior art, ABS resin is often used as a raw material for the lead-acid battery plastic case, and the lead-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L55/02C08L27/06C08L9/02C08L25/06C08K13/06C08K9/06C08K9/02C08K7/08C08K3/34
CPCC08L55/02C08K2201/003C08K2201/014C08L2201/02C08L2201/08C08L2203/20C08L2205/035C08L27/06C08L9/02C08L25/06C08K13/06C08K9/06C08K9/02C08K7/08C08K3/34
Inventor 佘进泉章维华王祥鑫王斌豆行枫
Owner ZHEJIANG CHANGTONG SCI & TECH
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