Production method of high-strength AGM partition plate

Abstract

The invention discloses a production method of a high-strength AGM partition plate. The production method comprises the following steps of (1) preparation of modified nanometer silicon nitride; (2) preparation of modified basalt mineral fiber; (3) material preparation; (4) pulping; (5) papermaking and forming; (6) primary drying; (7) rolling; and (8) secondary drying. The production method of the high-strength AGM partition plate is simple in step, low in production cost and high in maneuverability, the produced partition plate is high in mechanical strength and heat dissipation performance, fine and uniform in aperture and moderate in porosity size, and lead dendrite can be prevented from penetrating through the partition plate to cause chronic short circuit.

Description

technical field [0001] The invention relates to the technical field of production of AGM partitions, in particular to a production method of high-strength AGM partitions. 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 t...

AI Technical Summary

Problems solved by technology

In this preparation method, the glass fiber is not easy to disperse and flocculate when beating, and the uniformity of the prepared separator is poor; the slurry cannot be well stabilized due to the vacuum negative pressure during the forming and papermaking process, resulting in the thickness of the separator. If the control is very good, the uniformity of the thickness of the obtained separator is poor; after the polyolefin resin is melted, it will cause uneven distribution of the aperture of the separator, which will affect the uniformity of the aperture of the separator, and the negative electrode lead dendrite may penetrate the separator, resulting in battery chronic short circuit