Mixed anode lead paste binder of ultra-battery and preparation method thereof

Abstract

The invention discloses a mixed anode lead paste binder of an ultra-battery and a preparation method thereof. The mixed bonder with the ultra-battery and the anode lead paste is prepared by mixing raw materials according to weight proportions of organic addictive: ethylene-vinyl acetate copolymer: polyvinyl alcohol: water=1:0.1-0.8:1-3:15-20. The organic addictive is one or two or a mixture of more of polyfluortetraethylene, butadiene styrene rubber and sodium carboxymethylcellulose. According to use, the invention is proved that the bonding capability between the lead paste and a grid as well as among lead paste components is strong so that the battery cannot be subjected to precipitation and carbon infiltration in the charging / discharging processes, and the assembled ultra-battery has the characteristics of excellent cycle life and charging / discharging performances.

Description

technical field [0001] The invention relates to the field of preparation of lead-acid storage batteries, in particular to the formula of super battery negative pole lead paste. Background technique [0002] Lead-acid super battery is the latest technology of lead-acid battery today. This battery has both the high power characteristics of super capacitor and the high energy density characteristics of battery. It has broad market prospects in the application of new energy vehicle batteries. Currently, there are two ways to obtain this kind of super battery, one is the external connection method, and the other is the internal connection method, wherein the internal connection method is to add carbon materials to the negative electrode paste. Adding carbon materials to the conventional battery lead paste formula will reduce the viscosity of the lead paste and cannot effectively combine with the grid. Poor plate bonding, carburization and precipitation, resulting in failure of b...

AI Technical Summary

Problems solved by technology

Adding carbon materials to the conventional battery lead paste formula will reduce the viscosity of the lead paste and cannot effectively combine with the grid. Poor plate bonding, carburization and precipitation, resulting in battery assembly failure and reduced cycle life

For example, the patent application 2009102098751 discloses a supercapacitor battery. The patent application adds granular capacitive electrode materials to the negative plate lead paste of an ordinary lead-acid battery to make a composite negative plate. The used binder is PTFE / PVDF / CMC / One or more mixtures of fluororubber and neoprene. Whether these materials are used alone or in combination, the bonding effect is not ideal, which will affect the battery's charge acceptance and cycle life.