Hollingsworth & Vose Company

John A Wertz

Nicolas Clement

William S Freeman

Akshay Ashirgade

Stephen T Cox

Sachin Kumar

Douglas M Guimond

Randall B Keisler

Zhiping Jiang

David T Healey

Maxim Silin

Abdoulaye Doucouré

Richard O Angus, Jr

Mark Rowlands

Gubbi Krishnappa Natesh

Krishna Marchigowda

John L Manns

Yuri Vulfson

Mark S Millar

Christopher Campion

Mahadevaswamy Kodimole Mahadevappa

Harish Moddegowdru Ramaswamy

Abdoulaye Doucoure

Basavaraju Girisha

Kameswara Rao Patchigolla Venkata

Rene Gargan

Battery components are generally provided. In some embodiments, the battery components can be used as pasting paper and/or capacitance layers for batteries, such as lead acid batteries. The battery components described herein may comprise a plurality of fibers. The battery component may include, in some embodiments, a plurality of fibers and, optionally, one or more additives such as conductive carbon and/or activated carbon. In certain embodiments, the plurality of fibers include relatively coarse glass fibers (e.g., having an average diameter of greater than or equal to 2 microns), relatively fine glass fibers (e.g., having an average diameter of less than 2 microns), and/or fibrillated fibers. In some instances, such fibers may be present in amounts such that the battery component has a particular surface area, mean pore size, and/or dry tensile strength.

Battery components comprising fibers

Fine fiber products including fiber webs, as well as related assemblies, systems and methods, are described. In some embodiments, fiber webs described herein may include fine fibers and relatively low amounts of degraded polymer formed during a fiber extrusion process. The fiber webs may be used for filter media applications.

Fine fiber filter media and processes

Disclosed are battery separators comprising glass fibers and having a basis weight (gsm), a specific surface area (m/g), a density (gsm/mm) and a mean pore size (&#x3bc;m), which satisfy the equation disclosed herein. Also disclosed are batteries comprising the battery separators, and processes for making the separators.

Battery separators with controlled pore structure

The disclosure describes compositions and methods for producing a change in the voltage at which hydrogen gas is produced in a lead acid battery. The compositions and methods relate to producing a concentration of one or more metal ions in the lead acid battery electrolyte. The compositions include glass based compositions that are included as part of various battery components, such as the battery separator, pasting paper, additives to battery paste, etc.

Glass compositions with leachable metal oxides and ions

Non-woven webs that can be used as battery separators for batteries, such as lead acid batteries, are generally provided. In some embodiments, battery separators comprising a non-woven web including one or more chemical additives are provided. The chemical additives may impart beneficial properties, such as enhanced separator stability and/or battery performance. In some embodiments, the chemical additive(s) may confer resistance to oxidation, heavy metal deposition, and/or formation of short circuits during cycling of a battery including the battery separator. The respective characteristics and/or amounts of the chemical additive(s) may be selected to impart desirable properties while having relatively minimal or no adverse effects on another property of the battery separator and/or the battery.

Battery separators comprising chemical additives and/or other components

Disclosed are battery separators comprising glass fibers and having a basis weight (gsm), a specific surface area (m/g), a density (gsm/mm) and a mean pore size (&#x3bc;m), which satisfy the equation disclosed herein, provided that: the specific surface area is less than 1.5 m/g, or the density is greater than 180 gsm/mm. Also disclosed are batteries comprising the battery separators, and processes for making the separators.

Filter media are described. The filter media may include multiple layers. In some embodiments, the filter media include a nanofiber layer adhered to another layer. In some embodiments, the layer to which the nanofiber layer is adhered is formed of multiple fiber types (e.g., fibers that give rise to structures having different air permeabilities and/or pressure drops). In some embodiments, the nanofiber layer is adhered to a single-phase or a multi-phase layer. In some embodiments, the nanofiber layer is manufactured from a meltblown process. The filter media may be designed to have advantageous properties including, in some cases, a high dust particle capture efficiency and/or a high dust holding capacity.

Filter media with a multi-layer structure

In some embodiments, a battery separator described herein may comprise a layer having a relatively low apparent density; for example, the density that includes any unoccupied space within the outermost boundaries of the layer may be relatively low. The low apparent density may be attributed to, at least in part, the geometry of the layer. For instance, in some embodiments, the layer may include undulations and/or have at least one non-planar surface (e.g., a corrugated layer; an embossed layer). In some embodiments, a battery comprising a layer having a relatively low apparent density may have desirable properties, including relatively low electrical resistance and/or relatively high capacity. The battery separators described herein may be well suited for a variety of battery types, including lead acid batteries.

Battery separators having a low apparent density

Filter media, as well as related assemblies, systems and methods. Filter media may contain one or more layers formed of a meltblown material.

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Hollis, NH, United States of America

John A Wertz