Patent ID: 6406813
Filing Date: 2002-06-18
Classification: H01M,Y02E

Abstract:
A sealed, lead-acid cell comprising a container, at least one positive plate and a negative plate disposed within said container, a separator disposed within said container and separating said positive and negative plates, and an electrolyte substantially completely absorbed in said separator and plates, said separator comprising a microfiber mat having at least two layers and a thickness in the range of 0.060 to 0.150 inches, at least one layer being glass microfibers having a diameter of about 0.3 to 5.0&mgr; and another layer comprised of about 40% to 80% by weight of plastic microfibers having a contact angle of no more than 1.5Â° to said electrolyte and a diameter of about 1.1 to 5.0 &mgr; and the balance being said glass microfibers, said separator having a porosity of about 87% to 94%, a surface area of about 1.0 to 2.2 meters2/gm, and a maximum pore diameter of about 8 to 20&mgr; and a mean pore diameter of about 1.2 to 5.0&mgr;.