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Preparation method of high-dendritic-crystal-resistance short circuit baffle plate

A dendrite short-circuit and separator technology, which is applied in the direction of circuits, electrical components, battery pack components, etc., can solve problems such as battery short circuit, battery failure, lead dendrite growth, etc., to improve tensile strength and elongation, prolong Increased cycle life and puncture resistance

Inactive Publication Date: 2013-11-20
HENAN CHAOWEI POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of the separator in sulfuric acid directly affects the life of the battery, and the unreasonable pore structure of the separator will lead to the growth of lead dendrites, which will increase the risk of short circuit of the battery and reduce the service life of the battery
The growth of lead dendrites leads to a short circuit in the battery, and it does not inhibit the expansion of the positive active material during deep discharge cycles, leading to premature failure of the battery
In addition, the tensile strength of the separator is too low, it is easy to be torn and punctured, and it will also cause a short circuit and reduce the cycle life of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the high resistance to dendrite short-circuit separator in this embodiment comprises the following steps:

[0022] (1) Equipped with the following raw materials by weight: 5Kg of 44-degree glass fiber, 25Kg of 35-degree glass fiber, 39Kg of 29-degree glass fiber, 23Kg of recycled material, 3Kg of organic fiber PET; the recycled material is 100% waste material of glass fiber material separator ;

[0023] (2) Beating: Add 8000L of deionized water to the beater, then add 800mL of sulfuric acid (specific gravity 1.84), add glass fibers into the beater in sequence from high to low beating degree, and finally add dry recycled material and PET; Control the beating concentration (mass concentration) at 1% by continuing to add deionized water, and transfer the slurry to the slurry mixing tank after completion;

[0024] (3) Slurry: Inject deionized water into the slurry in the mixing tank, stir at the same time, dilute the concentration (mass concentrat...

Embodiment 2

[0032] The preparation method of the high resistance to dendrite short-circuit separator in this embodiment comprises the following steps:

[0033] (1) Prepare the following raw materials by weight: 4Kg of 42-degree glass fiber, 23Kg of 34-degree glass fiber, 36Kg of 27-degree glass fiber, 22Kg of recycled material, 2.5 Kg of organic fiber PET; the recycled material is the waste of 100% glass fiber material separator material;

[0034] (2) Beating: add 6m into the beater 3 After deionized water, add 500mL of sulfuric acid (specific gravity 1.84), add glass fiber into the beater in turn from high to low degree of beating, and finally add dry recycled material and PET; continue to add deionized water to make the beating concentration (mass Concentration) is controlled at 0.9%, and the slurry is transferred to the slurry mixing tank after completion;

[0035] (3) Slurry adjustment: Inject deionized water into the slurry in the mixing tank, stir at the same time, dilute the conc...

Embodiment 3

[0040] The preparation method of the high resistance to dendrite short-circuit separator in this embodiment comprises the following steps:

[0041] (1) Equipped with the following raw materials by weight: 6Kg of 45-degree glass fiber, 27Kg of 36-degree glass fiber, 42 Kg of 30-degree glass fiber, 24Kg of recycled material, 3.5Kg of organic fiber PET; the recycled material is 100% glass fiber material clapboard waste;

[0042] (2) Beating: add 7m into the beater 3 After deionized water, add 1000mL of sulfuric acid (specific gravity 1.8), add glass fiber into the beater in turn from high to low degree of beating, and finally add dry recycled material and PET; continue to add deionized water to make the beating concentration (mass Concentration) is controlled at 1.1%, and the slurry is transferred to the mixing tank after completion;

[0043] (3) Slurry adjustment: Inject deionized water into the slurry in the mixing tank, stir at the same time, dilute the concentration (mass c...

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Abstract

The invention belongs to the field of lead acid battery materials and particularly relates to a preparation method of a high-dendritic-crystal-resistance short circuit baffle plate. The preparation method of the high-dendritic-crystal-resistance short circuit baffle plate provided by the invention comprises the following steps of: pulping raw materials including 4-6 parts of 42-45 degrees glass fiber, 23-27 parts of 34-36 degrees glass fiber, 36-42 parts of 27-30 degrees glass fiber, 22-24 parts of reclaimed materials and 2.5-3.5 parts of organic fiber PET (polyethylene glycol terephthalate); mixing pulp, molding, drying to obtain the finished product. The puncture-resistant capability of the baffle plate can be improved; the pore diameter distribution of the baffle plate is more reasonable and has very high homogeneity; the short circuit caused by lead dendritic crystal growth in a battery can be prevented; meanwhile, the tensile strength and the elongation of the baffle plate can be improved; the short circuit caused when the baffle plate is torn off or pierced during the assembly process can be prevented; the service life of the battery is prolonged greatly.

Description

technical field [0001] The invention belongs to the field of lead-acid battery materials, and in particular relates to a preparation method of a highly resistant dendrite short-circuit separator. Background technique [0002] The separator, commonly known as the third pole of the battery, is an important part of the battery, and even plays a decisive role in some cases. Its material itself is an electronic insulator, and its porosity makes it have ion conductivity, which is beneficial to the high rate of the battery. The discharge capacity and terminal voltage level have important influences. The stability of the separator in sulfuric acid directly affects the life of the battery, and the unreasonable pore structure of the separator will lead to the growth of lead dendrites, which will increase the risk of short circuit of the battery and reduce the service life of the battery. The growth of lead dendrites leads to a short circuit in the battery, and it also fails to inhibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M50/403
CPCY02E60/12Y02E60/10
Inventor 程习鹏李守刚程志明李松林
Owner HENAN CHAOWEI POWER SUPPLY
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