Daramic, LLC

In one aspect, a device for absorbing a liquid is provided, the device comprising one or more layers of a polyolefin. The device may be configured as a microporous membrane comprising one or more layers of a polyolefin and can further be configured to absorb an oil while also allowing water to pass through or to absorb oil while repelling or not allowing water to pass through. The device may be configured as at least one of a sheet, a strip, a roll, pleated, embossed, ribbed, and patterned. The device may further be configured as a floor covering or mat.

Disclosed herein are exemplary embodiments of improved electrode plate and separator assemblies ( 400 ) for lead acid batteries, improved lead acid cells or batteries incorporating the improved assemblies, systems or vehicles incorporating the improved assemblies ( 400 ) and/or batteries ( 100 ), and methods related thereto. The electrode plate ( 200, 201 ) may have a grid ( 202 ) of a stamped, cast, or expanded metal manufacturing process. The grid ( 202 ) may have a non-uniform application of active material ( 203 ). The separators ( 300 ) preferably provide a support structure for resisting or mitigating any plate warping or plate deflection.

A lead acid battery separator having a first array of ribs extending from a first side of a backweb, and a second array of ribs extending from a second side of the backweb. Both the first array of ribs and the second array of ribs are cross-machine direction (CMD) ribs. In a flooded lead acid (FLA) or valve regulated lead acid (VRLA) battery, the CMD ribs extend in a direction that is parallel to a top and bottom of the battery. The separator helps reduce acid stratification issues, allowing for FLA batteries to be used as auxiliary batteries or enhanced flooded lead acid batteries (EFB), and further improving VRLA performance when used as auxiliary batteries.

Improved battery separators, batteries, and systems, as well as methods relating thereto are disclosed herein for use in various lead acid batteries such as valve-regulated lead acid (VRLA) batteries that include one or more AGM layers. The improved battery separators described herein may provide a battery system with an advantage of a significantly decreased acid filling time and a significantly increased acid filling speed. Various improved batteries, methods and systems are described herein using such improved battery separators that increase acid filling speed and decrease acid filling time for a VRLA battery.

A battery separator has performance enhancing additives or coatings, fillers with increased friability, increased ionic diffusion, decreased tortuosity, increased wettability, reduced oil content, reduced thickness, decreased electrical resistance, and/or increased porosity. The separator in a battery reduces the water loss, lowers acid stratification, lowers the voltage drop, and/or increases the CCA. The separators include or exhibit performance enhancing additives or coatings, increased porosity, increased void volume, amorphous silica, higher oil absorption silica, higher silanol group silica, reduced electrical resistance, a shish-kebab structure or morphology, a polyolefin microporous membrane containing particle-like filler in an amount of 40% or more by weight of the membrane and ultrahigh molecular weight polyethylene having shish-kebab formations and the average repetition periodicity of the kebab formation from 1 nm to 150 nm, decreased sheet thickness, decreased tortuosity, separators especially well-suited for enhanced flooded batteries.

Disclosed herein are novel or improved fibrous layers, composites, composite separators, separators, composite mat separators, composite mat separators containing fibers and silica particles, battery separators, lead acid battery separators, and/or flooded lead acid battery separators, and/or batteries, cells, and/or methods of manufacture and/or use of such fibrous layers, composites, composite separators, separators, battery separators, lead acid battery separators, cells, and/or batteries. In addition, disclosed herein are methods, systems, and battery separators for enhancing battery life, reducing internal resistance, reducing metalloid poisoning, reducing acid stratification, and/or improving uniformity in at least enhanced flooded batteries.

Disclosed herein are exemplary embodiments of improved electrode plate and separator assemblies ( 400 ) for lead acid batteries, improved lead acid cells or batteries incorporating the improved assemblies, systems or vehicles incorporating the improved assemblies ( 400 ) and/or batteries ( 100 ), and methods related thereto. The electrode plate ( 200, 201 ) may have a grid ( 202 ) of a stamped, cast, or expanded metal manufacturing process. The grid ( 202 ) may have a non-uniform application of active material ( 203 ). The separators ( 300 ) preferably provide a support structure for resisting or mitigating any plate warping or plate deflection.

A battery separator has performance enhancing additives or coatings, fillers with increased friability, increased ionic diffusion, decreased tortuosity, increased wettability, reduced oil content, reduced thickness, decreased electrical resistance, and/or increased porosity. The separator in a battery reduces the water loss, lowers acid stratification, lowers the voltage drop, and/or increases the CCA. The separators include or exhibit performance enhancing additives or coatings, increased porosity, increased void volume, amorphous silica, higher oil absorption silica, higher silanol group silica, reduced electrical resistance, a shish-kebab structure or morphology, a polyolefin microporous membrane containing particle-like filler in an amount of 40% or more by weight of the membrane and ultrahigh molecular weight polyethylene having shish-kebab formations and the average repetition periodicity of the kebab formation from 1 nm to 150 nm, decreased sheet thickness, decreased tortuosity, separators especially well-suited for enhanced flooded batteries.

Disclosed herein is a composite membrane for a flow battery, having: a hydrophilic porous flat-sheet filled polyolefin membrane; and at least one other hydrophilic porous flat-sheet membrane. In other embodiments, an asymmetric hydrophilic porous flat-sheet membrane is disclosed. The asymmetric hydrophilic porous flat-sheet membrane may be an asymmetric hydrophilic porous filled polyolefin flat-sheet membrane.

Disclosed herein are novel or improved separators, battery separators, lead acid battery separators, batteries, cells, and/or methods of manufacture and/or use of such separators, battery separators, lead acid battery separators, cells, and/or batteries. In accordance with at least certain embodiments, the present disclosure or invention is directed to novel or improved battery separators for lead acid batteries. In addition, disclosed herein are methods, systems and battery separators for enhancing battery life, reducing water loss, reducing float current, minimizing internal resistance increase, reducing failure rate, reducing acid stratification and/or improving uniformity in at least lead acid batteries. In accordance with at least particular embodiments, the present disclosure or invention is directed to an improved separator for lead acid batteries wherein the separator includes improved coatings, improved configurations, and/or the like.