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 batteries, in particular to the formulation of negative lead paste for super battery. Background technique [0002] Lead-acid super battery is the latest technology of today's lead-acid battery. The battery has both the high-power characteristics of super capacitors and the high energy density characteristics of batteries, and has broad market prospects in the application of new energy vehicle batteries. At present, there are two ways to obtain this super battery, one is the external connection method, and the other is the internal connection method. The internal connection method is to add carbon material to the negative electrode lead paste. After adding carbon material to the conventional battery lead paste formula, the viscosity of the lead paste will be reduced, and the lead paste cannot be effectively combined with the grid. Poor plate bonding and carbon leaching out, resulting in fa...

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.