Separators for VRLA batteries and methods relating thereto
AssigneeDaramic, LLC
InventorsEric H. Miller, Robert W. Saffel
Life of this patent
Estimating the term…
Abstract
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.
Claims20
A battery separator comprising:
- at least one microporous polyolefin separator layer, said microporous polyolefin separator layer having a first surface and a second surface;
- at least said first surface comprising at least one of the list consisting of ribs, embossments, acid filling channels, and a combination thereof;
- at least said second surface comprising at least one of the list consisting of ribs, embossments, acid filling channels, mini cross ribs, and a combination thereof;
- said microporous polyolefin separator layer comprises first areas comprising a first set of pores and a compressed pore structure;
- and further comprises second areas comprising a second set of pores and a pore structure less compressed than the pore structure of the first areas;
- optionally at least one first Absorptive Glass Mat (“AGM”) layer adjacent to one of said first surface or said second surface.
A Valve Regulated Lead Acid (“VRLA”) battery comprising:
- a positive electrode, a negative electrode, an electrolyte;
- and a composite battery separator;
- and the composite battery separator comprises at least one microporous polyolefin separator layer, said microporous polyolefin separator layer having a first surface and a second surface;
- at least said first surface comprising at least one of the list consisting of ribs, embossments, acid filling channels, and a combination thereof;
- at least said second surface comprising at least one of the list consisting of ribs, embossments, acid filling channels, mini cross ribs, and a combination thereof;
- said microporous polyolefin separator layer comprises first areas comprising a first set of pores and a compressed pore structure;
- and further comprises second areas comprising a second set of pores and a pore structure less compressed than the pore structure of the first areas;
- and at least one first Absorptive Glass Mat (“AGM”) layer adjacent to one of said first surface or said second surface.
A battery separator comprising:
- at least one microporous polyolefin separator layer, said microporous polyolefin separator layer having a first surface and a second surface;
- at least said first surface comprising at least one of the list consisting of ribs, embossments, acid filling channels, and a combination thereof;
- at least said second surface comprising at least one of the list consisting of ribs, embossments, acid filling channels, mini cross ribs, and a combination thereof;
- said microporous polyolefin separator layer comprises first areas comprising a first set of pores and a compressed pore structure;
- and further comprises second areas comprising a second set of pores and a pore structure less compressed than the pore structure of the first areas;
- at least one first Absorptive Glass Mat (“AGM”) layer adjacent to one of said first surface or said second surface.
Dependencies are inferred from the claim text.