Patent ID: 6071651
Filing Date: 2000-06-06
Classification: D04H,H01M,Y02E

Abstract:
A resilient battery separator medium comprising:a resilient, air laid, fibrous mat of randomly oriented, entangled microfibers; the air laid, fibrous mat having a weight between 75 and 150 grams per square meter and a thickness between 0.05 and 0.25 inches; the microfibers having a mean diameter between 1.2 and 1.7 microns; and the air laid, fibrous mat having first and second major surfaces for contacting major surfaces of electrode plates of a battery in which the air laid, fibrous mat is installed; the air laid, fibrous mat having a thickness, when subjected to a loading of 1.5 psi, greater than a spacing between the electrode plates between which the air laid, fibrous mat is to be installed; and the air laid, fibrous mat having a resilience which allows the separator medium to maintain contact with the electrode plates while undergoing repeated compressions and expansions, in a direction perpendicular to the major surfaces of the air laid, fibrous mat, when the electrode plates expand and contract during the service life of the battery.