Patent application number | Description | Published |
20080213671 | NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY - A negative electrode including a negative electrode current collector, first protrusions on a surface of the negative electrode current collector, a separation-stopping area on at least a part of a surface of each first protrusion, and a negative electrode active material layer including a negative electrode active material and formed on at least a top face of the first protrusion. This structure suppresses the separation of the negative electrode active material layer from the negative electrode current collector, the degradation of the current collecting ability, and the deformation of the negative electrode itself. A lithium ion secondary battery including this negative electrode has a high battery capacity, a high energy density, and an excellent charge/discharge cycle characteristic, and is capable of stably maintaining a high power over an extended period of time. | 09-04-2008 |
20090047577 | NEGATIVE ELECTRODE ACTIVE MATERIAL AND NEGATIVE ELECTRODE USING THE SAME AND LITHIUM ION SECONDARY BATTERY - In a negative electrode active material for a lithium ion secondary battery including a silicon oxide capable of absorbing and desorbing lithium ions, a silicon oxide having structural units each in the form of a tetrahedron in which a silicon atom is located at its center and silicon or oxygen atoms are located at its four vertices is used. The structural units are arranged randomly to form an amorphous structure. In the case that the number of oxygen atoms located at the four vertices in the structural units is represented by n (n=0, 1, 2, 3 or 4) and the structural units are represented by Si(n), the number of the structural units NSi(n) in the silicon oxide satisfies the following relations (1) to (3). | 02-19-2009 |
20090117472 | NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SUCH NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY - A negative electrode | 05-07-2009 |
20090280407 | BATTERY, ELECTRODE, AND CURRENT COLLECTOR USED THEREFOR - The present invention relates to a current collector including a base portion with a flat face, primary projections projecting from the flat face, and secondary projections projecting from the top of the primary projections. The present invention also relates to a current collector including a base portion with a flat face and primary projections projecting from the flat face, wherein the roughening rate of the top of the primary projections is 3 to 20. By using such a current collector, separation of the active material from the current collector can be inhibited when using an active material that has a high capacity but undergoes a large expansion at the time of lithium ion absorption. | 11-12-2009 |
20100040951 | NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME, AND LITHIUM SECONDARY BATTERY COMPRISING NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY - The negative electrode for a lithium secondary battery includes: a current collector | 02-18-2010 |
20100266898 | ELECTRODE FOR ELECTROCHEMICAL DEVICE - A problem to be solved by the invention is to provide an electrode for an electrochemical device which has a high capacity, suppresses the separation of an active material due to charge/discharge, and exhibits good cycle characteristics. To solve this problem, in the invention, an electrode | 10-21-2010 |
20110020688 | PORTABLE ELECTRONIC DEVICE - Provided is a highly safe portable electronic device having a secondary battery as a power source, and including a package, an electronic device body housed in the package, and a battery housing portion housed in the package, in which even if the content melts due to an extremely significant impact applied thereto, discharge of a melt is inhibited. In the portable electronic device, the battery housing portion is a molding with a battery fitting portion for fitting the secondary battery therein, and the battery fitting portion has a covering layer, which includes a temperature suppression layer and a block layer, provided on its surface. | 01-27-2011 |
20110026207 | PORTABLE ELECTRONIC DEVICE - A portable electronic device of the present invention includes a package, an electronic device body, a battery housing portion including a battery fitting portion for fitting a secondary battery therein, a foaming agent-containing layer provided on a surface of the battery housing portion, and a secondary battery to be fitted in the battery fitting portion. The foaming agent-containing layer is normally thin and, in the event of the battery generating heat, the layer turns into a thicker foamed layer which exhibits superior thermal insulation properties. Thus, it is possible to provide a portable electronic device having the degree of freedom in design for size and thickness reduction achieved at a high level, while offering high-level safety and reliability. | 02-03-2011 |
20110064983 | PORTABLE ELECTRONIC DEVICE - Provided is a highly safe portable electronic device having a secondary battery as a power source, and including a housing, an electronic device body housed in the housing, and a battery housing portion housed in the housing, in which a surface is inhibited from being locally heated to high temperature. In the portable electronic device, the battery housing portion is a molding with a battery fitting portion for fitting the secondary battery therein, and the battery fitting portion has provided on its surface a heat-insulating layer having a thickness of from 500 to 3000 μm and a thermal conductivity of 0.2 W/m·K or lower. | 03-17-2011 |
20110159341 | BATTERY PACK - A battery pack | 06-30-2011 |
20110165454 | BATTERY PACK - A battery pack | 07-07-2011 |
20120107684 | NEGATIVE ELECTRODE FOR LITHIUM-ION BATTERY, PRODUCTION METHOD THEREFOR, AND LITHIUM-ION BATTERY - A negative electrode for a lithium ion battery | 05-03-2012 |
20120176097 | METHOD FOR CHARGING/DISCHARGING POSITIVE ELECTRODE ACTIVE MATERIAL IN A LITHIUM SECONDARY BATTERY, CHARGING/DISCHARGING SYSTEM PROVIDED WITH LITHIUM SECONDARY BATTERY AND VEHICLE, ELECTRONIC DEVICE, BATTERY MODULE, BATTERY PACK - In a charge/discharge method for a positive-electrode active material in a lithium secondary battery, the lithium secondary battery includes a positive electrode containing a positive-electrode active material capable of occluding and releasing lithium ions, a negative electrode containing a negative-electrode active material capable of occluding and releasing lithium ions, a separator located between the positive electrode and the negative electrode, and an electrolyte having a lithium ion conductivity; and the positive-electrode active material contains a nickel-type lithium-containing complex oxide. The positive electrode, which has been charged, is discharged until having a first potential VDp | 07-12-2012 |