Chemical fiber composite partition board and production method thereof

A chemical fiber, production method technology, applied in fiber raw material processing, synthetic cellulose/non-cellulose material pulp/paper, electrical components, etc., can solve the problems of increasing battery cycle life, reducing battery capacity, shortening service life, etc. Achieve the effect of high acid absorption height, large capacity of assembled battery and high resilience

Pending Publication Date: 2019-06-04
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventional AGM absorbent ultrafine glass fiber separator (Absorptive Glass Met) is usually made of 100% ultrafine glass fiber, which is used in valve-regulated lead-acid batteries (VRLA) to prevent short circuit between the positive and negative electrodes of the battery ; However, conventional AGM separators have poor mechanical strength and poor resilience, and the assembled batteries are in a state of poor liquid during use, and the electrolyte is easy to dry up, which leads to the reduction of capacity and service life of VRLA batteries; the research found that , 5% to 30% chemical fiber (polypropylene fiber, polyethylene fiber) is mixed into the conventional AGM separator. Because the chemical fiber has certain hydrophobic properties, the separator can provide a certain amount of water during the charging process of the lead-acid battery. Oxygen channels, thus changing the conventional AGM separator separator technology that is in a poor liquid state when assembling batteries, so that batteries can be assembled with a super-designed amount of electrolyte, and these excessive electrolytes will not be blocked by chemical The oxygen channel provided by the fiber makes the migration of oxygen more smooth, improves the oxygen recombination rate, and reduces the amount of oxygen released to the outside of the battery, thereby increasing the cycle life of the battery

Method used

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  • Chemical fiber composite partition board and production method thereof
  • Chemical fiber composite partition board and production method thereof
  • Chemical fiber composite partition board and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: The addition ratio of PET chemical fiber is 8%, and the products of three specifications of 0.8mm, 2.31mm and 2.95 in thickness of 10kPa are trial-produced, and the method is as follows:

[0025] Step (1), raw material selection: select 8% PET chemical fiber and 92% superfine glass fiber (0.5-3.0 microns in diameter) as raw materials.

[0026] Step (2), slurry preparation: send the PET chemical fiber and ultra-fine glass fiber in the step (1) to the hydraulic pulper, add water to dilute to a concentration of 1.5%, add concentrated sulfuric acid to adjust the pH value to 2.5, defrosting time 10min, temperature It is at room temperature, and after decomposing, the slurry is sent to the unloading slurry tank, and after being stirred, it is sent to the slurry mixing tank, diluted with water to 0.4%, and then stored for later use.

[0027] Step (3), slag removal: send the slurry in step (2) into a low-concentration slag remover to remove the glass slag with a l...

Embodiment 2

[0037] Embodiment two: the addition ratio of PET chemical fiber is 9%, and the trial production of 10kPa thickness is 0.8mm, 2.31mm and 2.95 three kinds of specifications of products, the method is as follows:

[0038] Step (1) raw material selection: select 9% PET chemical fiber and 91% superfine glass fiber (0.5-3.0 microns in diameter) as raw materials.

[0039] Step (2) Slurry preparation: Send step (1) PET chemical fibers and ultrafine glass fibers to a hydropulper, add water to dilute to a concentration of 1.8%, add concentrated sulfuric acid to adjust the pH value to 3.0, and dissolve for 12 minutes at a temperature of At 25°C, the slurry is sent to the unloading slurry tank after decompression, and sent to the slurry mixing tank after stirring, diluted with water to 0.45%, and then stored for later use.

[0040] Step (3) slag removal: send the slurry in step (2) to a low-concentration slag remover to remove the heavy glass slag in the slurry. % later stored for later ...

Embodiment 3

[0049] Embodiment three: the addition ratio of PET chemical fiber is 10%, and the trial production of 10kPa thickness is 0.8mm, 2.31mm and 2.95 three kinds of products, the method is as follows:

[0050] Step (1), raw material selection: select 10% PET chemical fiber and 90% superfine glass fiber (0.5-3.0 microns in diameter) as raw materials.

[0051] Step (2), slurry preparation: send the PET chemical fiber and ultra-fine glass fiber in the step (1) to the hydraulic pulper, add water to dilute to a concentration of 2.0%, add concentrated sulfuric acid to adjust the pH value to 3.0, defrosting time 15min, temperature The temperature is 25°C. After decomposing, the slurry is sent to the unloading slurry tank, and after stirring, it is sent to the slurry mixing tank, diluted with water to 0.5%, and then stored for later use.

[0052] Step (3), slag removal: send the slurry in step (2) to a low-concentration slag remover to remove the glass slag in the slurry, and send the prepa...

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Abstract

The invention discloses a chemical fiber composite partition board and a production method thereof. The production method comprises the following four steps: (1) raw material selection: using PET polyethylene terephthalate chemical fibers and superfine glass fibers as raw materials; (2) pulp preparation: mixing the PET chemical fibers and the superfine glass fibers in step (1) with water in proportion, adding acid to adjust the pH value, and reserving the pulp for use after defibering; (3) slag removal: diluting the pulp in step (2) by adding water, removing glass slag by a conical slag remover, and sending the pulp to a machine chest for use; and (4) manufacture of paper with pulp: further diluting the pulp in step (3), carrying out dehydrating and forming through a pulp mixing box and aninclined wire forming machine, carrying out dehydrating through a vacuum box, sending the pulp to a baking oven for drying and evaporating, making the pulp pass through a paper winding machine and arewinding machine, and carrying out slitting and packaging to obtain a finished product. The chemical fiber composite partition board of the invention has the advantages of good tensile strength, highacid absorption height, good mechanical strength, high resilience, large battery capacity and long battery life.

Description

technical field [0001] The invention relates to a separator used in the storage battery industry, in particular to a chemical fiber composite separator and a production method thereof. Background technique [0002] Conventional AGM absorbent ultrafine glass fiber separator (Absorptive Glass Met) is usually made of 100% ultrafine glass fiber, which is used in valve-regulated lead-acid batteries (VRLA) to prevent short circuit between the positive and negative electrodes of the battery ; However, conventional AGM separators have poor mechanical strength and poor resilience, and the assembled batteries are in a state of poor liquid during use, and the electrolyte is easy to dry up, which leads to the reduction of capacity and service life of VRLA batteries; the research found that , 5% to 30% chemical fiber (polypropylene fiber, polyethylene fiber) is mixed into the conventional AGM separator. Because the chemical fiber has certain hydrophobic properties, the separator can prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14H01M10/06D21F9/02D21H13/24D21H13/40D21H15/12
CPCY02E60/10
Inventor 陈务平任浩
Owner NANJING FORESTRY UNIV
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