AGM partition plate capable of preventing electrolyte from being layered

An electrolyte and separator technology, applied in the field of AGM separators, can solve the problems affecting battery performance and life, poor electrolyte wettability, easy stratification of electrolyte, etc., to achieve high liquid absorption rate, excellent instantaneous water absorption and Good water retention, heat resistance and structural stability

Active Publication Date: 2017-01-04
ZHEJIANG CHANGTONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems that the AGM separators in the prior art have poor wettability to the electrolyte and the electrolyte is easy to stratify, which affects the performance and life of the battery. Good stability and electrolyte retention ability, uniform electrolyte distribution, high porosity, uniform voids, AGM separator with excellent comprehensive performance that can inhibit electrolyte stratification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An AGM separator that can inhibit electrolyte stratification, which is made of the following raw materials in mass percentage: 5% polyester fiber with a diameter of 0.3 μm and a length of 3 mm, 3% polyethylene oxide, 5% modified bamboo fiber, 10 % water-soluble polyvinyl alcohol fiber with a diameter of 1 μm and a length of 3 mm, 30% of the high-alkali glass fiber with a diameter of 0.5 μm and a length of 3 mm, and the remaining high-alkali glass fiber with a diameter of 3 μm and a length of 3 mm, wherein the modified bamboo fiber is obtained by the following method : Add bamboo fibers with a length of 2mm and a diameter of 0.03mm into chlorosulfonic acid, heat to 80°C to swell for 3 hours, cool, filter, wash the filtrate with water until the pH is neutral, dry in vacuum, then add the wetting agent to soak for 30 minutes After drying at 95°C, the modified bamboo fiber is obtained. The sizing agent is made of the following components by mass percentage: 40% polytetrafluor...

Embodiment 2

[0019] An AGM separator that can inhibit electrolyte stratification is made of the following raw materials in mass percentage: 10% polyester fiber with a diameter of 0.5 μm and a length of 5 mm, 5% polyethylene oxide, 10% modified bamboo fiber, 15% % water-soluble polyvinyl alcohol fiber with a diameter of 3 μm and a length of 5 mm, 35% of a high-alkali glass fiber with a diameter of 0.7 μm and a length of 5 mm, and the remaining high-alkali glass fiber with a diameter of 4 μm and a length of 5 mm, wherein the modified bamboo fiber is obtained by the following method : Add bamboo fibers with a length of 4mm and a diameter of 0.05mm into chlorosulfonic acid, heat to 100°C to swell for 1h, cool, filter, wash the filtrate with water until the pH is neutral, dry in vacuum, then add the wetting agent to soak for 60min After drying at 105°C, the modified bamboo fiber is obtained. The sizing agent is made of the following components by mass percentage: 50% polytetrafluoroethylene disp...

Embodiment 3

[0021] An AGM separator that can inhibit electrolyte stratification, which is made of the following raw materials in mass percentage: 7% polyester fiber with a diameter of 0.4 μm and a length of 4 mm, 4% polyethylene oxide, 7% modified bamboo fiber, 12 % water-soluble polyvinyl alcohol fiber with a diameter of 2 μm and a length of 4 mm, 32% high-alkali glass fiber with a diameter of 0.6 μm and a length of 4 mm, and the remaining high-alkali glass fiber with a diameter of 3.5 μm and a length of 4 mm, wherein the modified bamboo fiber is made by the following method Obtained: add bamboo fibers with a length of 2.5mm and a diameter of 0.04mm into chlorosulfonic acid, heat to 90°C to swell for 2 hours, cool, filter, wash the filtrate with water until the pH is neutral, dry in vacuum, and then add the wetting agent to carry out After soaking for 40 minutes, dry at 100°C to obtain modified bamboo fiber. The sizing agent is made of the following components by mass percentage: 45% poly...

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Abstract

The invention discloses an AGM partition plate capable of preventing an electrolyte from being layered. The AGM partition plate is prepared from the following raw materials based on percent by weight: 5-10% of polyester fiber, 3-5% of polyethylene oxide, 5-10% of modified bamboo fiber, 10-15% of water-soluble polyvinyl alcohol fiber, 30-35% of high alkali glass fiber with diameter of 0.5-0.7 micrometer with the balance being high alkali glass fiber with diameter of 3-4 micrometers. By the AGM partition plate, a traditional pure glass fiber formula is abandoned, various fibers are creatively adopted and are interwoven in a mixed way to form the AGM partition plate, higher electrolyte absorption quantity, high wettability and high electrolyte maintaining capability are achieved by means of synergistic matching among fibers, the electrolyte is uniform in distribution, high in porosity and uniform in air gap, and has excellent integral performance, the performance of a battery is favorably improved, and the service lifetime of the battery is favorably prolonged.

Description

technical field [0001] The invention relates to an AGM separator, in particular to an AGM separator capable of inhibiting electrolyte stratification. 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 the valve-regulated le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/12
CPCH01M10/121H01M50/403H01M50/446Y02E60/10Y02P70/50
Inventor 陈连强黄建忠郑书根应志超
Owner ZHEJIANG CHANGTONG SCI & TECH
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