Globe-union Inc.

Johnson Controls Technology Company

Zbb Technologies, Inc.

Ralph A Petersen

Norma K Bullock

Conrad E Weinlein

Wen-Hong Kao

Peter J Lex

Carl D Jahns

Ross A Henning

Coonen A Matthew

Matthew A Coonen

A method of making a battery plate includes mixing particles of tetrabasic lead sulfate with leady oxide to form a paste material. The particles have an average spherical particle diameter of less than 2.5 micrometers. The method also includes providing at least a portion of the paste material on a battery grid curing the battery grid and paste material at a temperature of less than approximately 48 degrees Celsius to produce a battery plate having a cured paste thereon.

Battery paste material and method

A carbon coating including carbon particles having a predetermined size and BET surface area. The carbon coating is applied to electrodes used in batteries. The electrodes may include a nonconductive frame defining at least one aperture and at least one carbon plastic sheet which is borne by the frame and disposed in occluding relation relative to the aperture. The carbon coating is applied to one surface of the carbon plastic sheet.

Carbon coating for an electrode

An electrode suitable for use as a lead-acid battery plate is formed of a paste composition which enhances the performance of the plate. The paste composition includes a basic lead sulfate, a persulfate and water. The paste may also include lead oxide and fibers. An electrode according to the invention is characterized by good strength in combination with high power density, porosity and surface area.

High performance positive electrode for a lead-acid battery

A process for making a battery paste includes steps of forming an active material in an aqueous slurry, then dewatering the slurry to form a battery paste. In one described embodiment, a slurry containing one or more basic lead sulfates suitable for use as the active material in lead-acid battery electrodes is formed in a continuously stirred tank reactor (36). The slurry is withdrawn from the reactor (36) and fed to a belt press (67) which reduces the moisture content of the slurry to the desired level. Battery pastes produced according to the invention may be fed continuously to a paster (89) for mass production of positive and negative battery plates from grids (91).

Apparatus for production of a battery paste

Improved formation efficiencies for positive pasted plates used in lead-acid batteries are provided by treatment of the positive plates with a stabilized aqueous alkaline persulfate solution to effect the conversion of lead monoxide to lead dioxide. Use of the alkaline persulfate solution enhances both formation and initial performance of the fabricated batteries. A stabilizing agent is added to the alkaline persulfate solution to stabilize the lead sulfate and basic lead sulfates in the paste. A preferred method for producing positive plates of a lead-acid battery comprises the steps of (a) heating the pasted plate, (b) spray coating with or dipping the plate in a persulfate solution, and (c) reheating the plate to accelerate the reaction of lead monoxide with persulfate to form lead dioxide. The persulfate treatment may be applied to uncured pasted plates and used with plate paste containing free lead, and the spray-coating procedure offers an easy and efficient manufacturing step.

Growing community of inventors

West Allis, WI, United States of America

Ralph A Petersen