| GS YUASA INTERNATIONAL LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120115030 | Electrode for electricity-storing device, electricity-storing device employing such electrode, and method of manufacturing electrode for electricity-storing device - An electricity-storing device electrode comprises a current collector foil, an active material layer formed on a surface of the current collector foil, and a high-resistance layer formed on the surface of the current collector foil so as to be adjacent to and in direct contact with the active material layer. At least a portion of the interface between the active material layer and the high-resistance layer, mixed phase is formed where constituents from the two layers intermingle. Presence of the mixed phase at the interface between the active material layer and the high-resistance layer improves the bond between the two adjacent layers. During manufacture and use, there is therefore reduced tendency to experience delamination or loss of the active material layer, the high-resistance layer, and/or other layer(s), such as layer(s) provided for short circuit prevention. | 05-10-2012 |
| 20120107492 | POSITIVE ELECTRODE CURRENT COLLECTOR FOR LEAD ACCUMULATOR - In a positive electrode current collector for a lead-acid battery including a coating of tin dioxide formed on the surface of a current collector substrate of titanium or a titanium alloy, the half width of a peak with the maximum intensity among peaks of tin dioxide in the x-ray diffraction pattern of the positive electrode current collector for a lead-acid battery is 1° or lower. | 05-03-2012 |
| 20120064396 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR FABRICATNG NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery includes a positive electrode containing a positive-electrode active material, a negative electrode containing a negative-electrode active material, and a non-aqueous electrolyte, and is characterized in that the non-aqueous electrolyte contains 1.0 wt % or less of a compound represented by formula (1) and 2.0 wt % or less of a cyclic sulfate ester represented by formula (2), based on the total weight of the non-aqueous electrolyte. By using the non-aqueous electrolyte including a specified amount of the compound represented by formula (1) and a specified amount of the cyclic sulfate ester, when the battery is used at a low temperature after being stored at a high temperature, the increase of the internal resistance is inhibited. | 03-15-2012 |
| 20120058375 | BATTERY - Provided is a battery which has less tendency to experience delamination or loss of short circuit prevention layer and/or active material layer during manufacture and use. | 03-08-2012 |
| 20120045689 | BATTERY ELECTRODE SHEET AND MANUFACTURING METHOD THEREFOR - Embodiments of the present invention provide such things as an electrode sheet having little curl for a spiral wound battery and a manufacturing method therefor. | 02-23-2012 |
| 20120028122 | POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY - The positive active material is a positive active material for a lithium secondary battery, including a lithium transition metal compound that has an olivine crystal structure and contains at least Ni, Fe, and Mn as transition metal elements, wherein when the sum of mole atoms of Ni, Fe, and Mn of transition metal elements contained in the lithium transition metal compound is expressed as 1, and the mole atomic ratios of Ni, Fe, and Mn are represented by a, b, and c (a+b+c=1, a>0, b>0, c>0), respectively, the following is satisfied: 0.85≦c≦0.92 and 0.3≦a/(a+b)≦0.9. | 02-02-2012 |
| 20120021286 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - The present invention provides a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode having a negative active material, and a non-aqueous electrolyte; characterized in that the negative active material contains composite particle (C), which has silicon-containing particle (A) and electronic conductive additive (B), and carbon material (D), wherein the weight of the electronic conductive additive (B) falls within the range of 0.5 wt. % to 60 wt. % to the weight of the composite particle (C). The negative active material contains silicon which is capable of performing high discharge capacity, so that a non-aqueous electrolyte secondary battery having a large discharge capacity can be obtained. In addition, since the negative active material contains the electronic conductive additive (B) and the carbon material (D), the contact conductivity between the silicon-containing particle (A) or between the negative active material improves and, as a result, a non-aqueous electrolyte secondary battery having satisfactory cycle performance can be attained. | 01-26-2012 |
| 20120021267 | BATTERY - The metal foil of the positive electrode | 01-26-2012 |
| 20110318655 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, NON-AQUEOUS ELECTROLYTE, AND METHOD FOR FABRICATNG NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery is described, capable of inhibiting the raise of the internal resistance at a low temperature after use in a high-temperature circumstance, and having a good power performance at a low temperature. The non-aqueous electrolyte secondary battery has a non-aqueous electrolyte, and is characterized in containing a sulfate ester with a specific structure in an amount of 4.0 wt % or less relative to the total weight of the non-aqueous electrolyte. | 12-29-2011 |
| 20110293995 | CONDUCTOR FOR CONNECTING TERMINALS, ASSEMBLED BATTERY, AND METHOD FOR PRODUCING ASSEMBLED BATTERY - A conductor for connecting terminals of a battery in which a conductor for connecting terminals ( | 12-01-2011 |
| 20110287293 | Cell and Method for Manufacturing the Same, Method and Apparatus for Manufacturing Cell Core, and Cell Core - Disclosed is a method for manufacturing a cell which includes: a first step of manufacturing a core using a core manufacturing apparatus, the apparatus including a pair of winding shafts disposed with a rotation center of the apparatus interposed therebetween, the pair of winding shafts orbitally moving about the rotation center; and a second step of fabricating a laminated electrode member with a sheet-shaped positive electrode, a sheet-shaped negative electrode and a pair of sheet-shaped separators interposed thereto to be arranged alternately with the electrodes; and winding the laminated electrode member around a circumferential surface of the core. The first step includes: inserting a sheet having a higher strength than the separators between the winding shafts; orbitally moving the pair of winding shafts; and adhesively bonding or melt-bonding overlapped portions of the sheet at the winding shafts. | 11-24-2011 |
| 20110281155 | BATTERY AND METHOD OF MANUFACTURING THE SAME - The present invention provides a battery including a rivet either inserted into a through hole defined in a lid of a battery case with gaskets and interposed therebetween, the rivet connecting a current collector connected to a power generating element within the battery case and an external terminal. One end of the rivet in the axial direction is connected to the current collector, and provided with a tubular portion recessed in the axial direction, the tubular portion is defined in one of such manners that a bottom surface of the tubular portion reaches the lid of the battery case and that the bottom surface is positioned on a side of the other end beyond the lid of the battery case, and a thickness of the tubular portion increases from the one end toward the other end. | 11-17-2011 |
| 20110274975 | POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY - It is an object of the present invention to provide a positive electrode material having a large ratio of the discharge capacity around 4 V to the total discharge capacity including the discharge capacity at 4V or lower while making the discharge capacity around 4 V sufficient, for the purpose of providing a lithium secondary battery using a lithium transition metal phosphate compound excellent in thermal stability, utilizing the discharge potential around 4V (vs. Li/Li | 11-10-2011 |
| 20110274972 | HYDROGEN-ABSORBING ALLOY AND NICKEL-METAL HYDRIDE RECHARGEABLE BATTERY - The present invention aims to increase the discharge capacity and to improve the cycle life performance in a nickel-metal hydride rechargeable battery using a La—Mg—Ni based hydrogen-absorbing alloy as an active material of a negative electrode. The present invention provides a hydrogen-absorbing alloy represented by the general formula (1): M1 | 11-10-2011 |
| 20110223482 | POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY - An object of the present invention is to provide a positive electrode for a lithium secondary battery, which is capable of improving the initial coulomb efficiency of a lithium secondary battery, and the like. A positive electrode for a lithium secondary battery, which comprises lithium manganese iron phosphate and a lithium-nickel-manganese-cobalt composite oxide, is provided. | 09-15-2011 |
| 20110192506 | Hydrogen absorbing alloy, hydrogen absorbing alloy electrode, secondary battery, and production method of hydrogen absorbing alloy - The present invention provides a hydrogen absorbing alloy containing a phase of a Pr | 08-11-2011 |
| 20110159356 | BATTERY AND METHOD OF MANUFACTURING SAME - It is an object of the present invention to provide a battery in which current collecting connector | 06-30-2011 |
| 20110068293 | POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY - The invention provides a polyanion-based positive active material which can improve storage stability (especially, high temperature storage stability), charge and discharge cycle performance and the like of a lithium secondary battery, and a lithium secondary battery using the same. The positive active material for a lithium ion secondary battery contains lithium iron cobalt phosphate represented by the general formula: Li | 03-24-2011 |
| 20110037440 | Process for producing lithium secondary battery - A process for producing a lithium secondary battery employs a charging method where a positive electrode upon charging has a maximum achieved potential of 4.3 V (vs. Li/Li+) or lower. The process includes charging the lithium secondary battery to reach at least a region with relatively flat fluctuation of potential appearing in a positive electrode potential region exceeding 4.3 V (vs. Li/Li | 02-17-2011 |
| 20100233542 | ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING THE SAME - The present invention provides an active material for a lithium secondary battery with a high discharge capacity, particularly for a lithium secondary battery that can increase the discharge capacity in a potential region of 4.3 V or lower, a method for producing the same, a lithium secondary battery having a high discharge capacity, and a method for producing the same. The active material for a lithium secondary battery includes a solid solution of a lithium transition metal composite oxide having an α-NaFeO | 09-16-2010 |
