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AGM membrane for lead-carbon battery and preparation method of AGM membrane

A lead-carbon battery and diaphragm technology, applied to lead-acid batteries, battery components, circuits, etc., to achieve the effects of easy control, high tensile strength, and good wet-state pressure-holding performance

Active Publication Date: 2018-08-24
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead-carbon batteries have high requirements on the performance of the battery separator, which require high tensile strength, strong puncture resistance, high pressure acid absorption performance, high resilience performance, and high wet pressure holding performance. However, the existing AGM Diaphragms do not yet meet this requirement

Method used

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  • AGM membrane for lead-carbon battery and preparation method of AGM membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 10 parts of high-alkali glass fibers with a monofilament diameter of 0.5-0.8 μm and 90 parts of high-alkali glass fibers with a monofilament diameter of 1.2-2.0 μm, and prepare an AGM diaphragm according to the above method. Among them: the decomposing time is 12 minutes; the drying temperature is 200° C.; the drying time is 8 minutes; the mass concentration of concentrated sulfuric acid is 78%.

Embodiment 2

[0035] Take 10 parts of high-alkali glass fibers with a monofilament diameter of 0.5-0.8 μm and 90 parts of high-alkali glass fibers with a monofilament diameter of 1.2-2.0 μm, and prepare an AGM diaphragm according to the above method. Among them: the decomposing time is 15 minutes; the drying temperature is 220° C.; the drying time is 7 minutes; the mass concentration of concentrated sulfuric acid is 85%.

Embodiment 3

[0037] Take 20 parts of high-alkali glass fibers with a single-filament diameter of 0.5-0.8 μm and 80 parts of high-alkali glass fibers with a single-filament diameter of 1.2-2.0 μm, and prepare an AGM diaphragm according to the above method. Among them: the decomposing time is 12 minutes; the drying temperature is 220° C.; the drying time is 7 minutes; the mass concentration of concentrated sulfuric acid is 90%.

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Abstract

The invention discloses an AGM membrane for a lead-carbon battery and a preparation method of the AGM membrane. According to the AGM membrane for the lead-carbon battery, the membrane is prepared by compounding coarse and thin high-alkali glass fibers through a wet process. The obtained membrane is good in strength property, assembly mechanization production can be met and a short circuit of the battery due to the fact the membrane is punctured by lead dendrites in the using process can be prevented; the pressurized acid absorption property is good and enough electrolyte can be absorbed to ensure high-capacity discharging of the battery; the AGM membrane is good in resilience, the membrane and a polar plate are kept in close contact and peeling of active substances is reduced; the wet pressure maintaining property is good, the capacity of the battery is improved and the cycle life of the battery is prolonged; and the preparation technology is simple and the lead-carbon battery producedby using the AGM membrane has excellent high-current charge-discharge performance and cycle life.

Description

technical field [0001] The invention relates to an AGM separator for lead-carbon batteries and a preparation method thereof, belonging to the field of lead-carbon batteries. Background technique [0002] The battery separator is a porous insulating material that is placed between the positive and negative electrodes of the battery to separate the positive and negative electrodes and play the role of insulation. At the same time, the battery separator allows the ions participating in the chemical reaction to pass through during the charging and discharging process of the battery. For a sealed maintenance-free battery, it is also necessary to ensure that the oxygen precipitated from the positive electrode reaches the negative electrode through the separator to complete the hydrogen-oxygen recombination reaction. Therefore, as an important part of the battery, the battery separator plays a decisive role in the performance of the battery, known as the "third pole" of the battery...

Claims

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Application Information

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IPC IPC(8): H01M2/14H01M2/16H01M10/06H01M50/403H01M50/437H01M50/44
CPCH01M10/06H01M50/431H01M50/44H01M50/403Y02E60/10
Inventor 王屹倪君刘铁军宋德华王伟
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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