Class / Patent application number | Description | Number of patent applications / Date published |
429248000 | Having additive for effecting the charge capacity, life, etc., of a cell | 7 |
20090029261 | SEPARATOR INCLUDING ELECTROACTIVE MATERIAL FOR OVERCHARGE PROTECTION - Porous separators for use in electrochemical cells and methods of their manufacture are provided. The separators are porous structures comprising an electroactive material and an electronically insulating structural material, wherein the electroactive material forms a percolating path in the separator. | 01-29-2009 |
20090176160 | ELECTROACTIVE SEPARATOR FOR OVERCHARGE PROTECTION - A separator for a battery that includes a first polymer to provide structural support and a second polymer mixed with the first polymer. The second polymer provides an open channel for ionic transport through the separator. The separator also includes a third polymer interspersed with the first polymer and the second polymer. The third polymer is an insulator when a potential in the battery is less than a switching voltage, and is a conductor when the potential in the battery is greater than the switching voltage. | 07-09-2009 |
20110165469 | SEPARATOR FOR NON-AQUEOUS SECONDARY BATTERY, PROCESS FOR PRODUCING THE SAME, AND NON-AQUEOUS SECONDARY BATTERY - A first object of the present invention is to provide a separator including a polyethylene microporous membrane and a heat-resistant porous layer, and that has a sufficient shutdown function and a sufficient heat resistance, and can be formed with a reduced thickness and can overcome the problem of slidability. A first aspect of the present invention is a separator for a non-aqueous secondary battery. The separator includes a microporous membrane of primarily polyethylene, and a heat-resistant porous layer of a primarily heat-resistant polymer formed on at least one surface of the microporous membrane. (1) The microporous membrane has a Gurley number of 25 to 35 sec/100 cc·μm per unit thickness. (2) The heat-resistant porous layer contains inorganic fine particles having an average particle diameter of 0.1 to 1.0 μm. (3) The inorganic fine particles are 40% to 80% in volume with respect to a total volume of the heat-resistant polymer and the inorganic fine particles. (4) The heat-resistant porous layer has a total thickness of 3 to 12 μm. | 07-07-2011 |
20110217595 | SEPARATION LAYER FOR SEPARATING ANODE AND CATHODE IN LITHIUM ION ACCUMULATORS OR BATTERIES - Electronic short-circuiting between the anode and cathode in Li ion accumulators or batteries, an electronic separate of anode must be present with minimum electronic conductivity. To this end, in general a separating layer in the form of porous films, non-woven fabrics or nets made of polypropylene or similar polymers and containing Li ion-conducting salts and ceramic particles is used. Disadvantages of the known separating layers are the low thermal resistance and thereby embodiments with a high energy content, expensive manufacturing processes and complex interaction of the chemical substances used in the separating layers. | 09-08-2011 |
20110236763 | ELECTRIC STORAGE DEVICE - In an electric storage device, lithium electrodes are disposed on respective outermost portions of an electrode laminated unit in which a positive electrode and a negative electrode are laminated alternately via positive/negative electrode separators. The lithium electrode includes lithium metal serving as a lithium ion supply source, and a lithium electrode separator (a non-woven fabric separator) constituted by a non-woven fabric that satisfies the following conditions: (a) an average fiber diameter of 0.1 μm to 10 μm; and (b) a thickness of 5 μm to 500 μm is provided. By forming the lithium electrode separator that contacts the lithium electrode including the lithium ion supply source from a non-woven fabric in this manner, a dramatic improvement can be achieved in the cycle characteristic of the electric storage device. | 09-29-2011 |
20120171573 | HYBRID MATERIALS USING IONIC PARTICLES - A separator substrate include a substrate having a bulk portion and a surface portion, the surface portion having at least one porous area with a net charge; and ionic particles coupling to at least a part of the at least one porous area. The ionic particles have a net charge of an opposite sign to the net charge of the at least one porous area. The coupling between the part of the at least one porous area and the ionic particles may result in at least one of a good electrochemical performance, chemical stability, thermal stability, wettability, and mechanical strength of the separator substrate. | 07-05-2012 |
20140255789 | OXIDATION PROTECTED SEPARATOR - A battery separator for a lead/acid battery is resistant to oxidation arising from the use of water or acid containing contaminants, for example chromium (Cr), manganese (Mn), titanium (Ti), copper (Cu), and the like. The separator is a microporous membrane including a rubber. The rubber is no more than about 12% by weight of the separator. The rubber may be rubber latex, tire crumb, and combinations thereof. The rubber may be impregnated into the microporous membrane. The microporous membrane may be a microporous sheet of polyolefin, polyvinyl chloride, phenol-formaldehyde resins, cross-linked rubber, or nonwoven fibers. A method for preventing the oxidation and/or extending battery life of the separator is also included. | 09-11-2014 |