Patent application number | Description | Published |
20100227221 | Preparation Method of Lithium-Metal Composite Oxides - Disclosed is a method for preparing a lithium-metal composite oxide, the method comprising the steps of: (a) mixing an aqueous solution of one or more transition metal-containing precursor compounds with an alkalifying agent and a lithium precursor compound to precipitate hydroxides of the transition metals; (b) mixing the mixture of step (a) with water under supercritical or subcritical conditions to synthesize a lithium-metal composite oxide, and drying the lithium-metal composite oxide; and (c) subjecting the dried lithium-metal composite oxide either to calcination or to granulation and then calcination. Also disclosed are an electrode comprising the lithium-metal composite oxide, and an electrochemical device comprising the electrode. In the disclosed invention, a lithium-metal composite oxide synthesized based on the prior supercritical hydrothermal synthesis method is subjected either to calcination or to granulation and then calcination. Thus, unlike the prior dry calcination method or wet precipitation method, a uniform solid solution can be formed and the ordering of metals in the composite oxide can be improved. Accordingly, the lithium-metal composite oxide can show crystal stability and excellent electrochemical properties. | 09-09-2010 |
20100227222 | Lithium-Metal Composite Oxides and Electrochemical Device Using the Same - Disclosed is a lithium-containing metal composite oxide comprising paramagnetic and diamagnetic metals, which satisfies any one of the following conditions: (a) the ratio of intensity between a main peak of 0±10 ppm (Io PPm) and a main peak of 240±140 ppm (I240 pPm), Uoppm/124o PPm), is less than 0.117·Z wherein Z is the ratio of moles of the diamagnetic metal to moles of lithium; (b) the ratio of line width between the main peak of 0±10 ppm (Io PPm) and the main peak of 240+140 ppm (I24o PPm), (W24o PPm/WO ppm), is less than 21.45; and (c) both the conditions (a) and (b), the peaks being obtained according to the 7Li—NMR measurement conditions and means disclosed herein. Also, an electrode comprising the lithium-containing metal composite oxide, and an electrochemical device comprising the electrode are disclosed. The lithium-containing multicomponent metal composite oxide shows crystal stability and excellent physical properties as a result of an improved ordering structure of metals, in which the components of the composite oxide are uniformly distributed. Thus, it can provide a battery having high capacity characteristics, long cycle life characteristics and improved rate characteristics. | 09-09-2010 |
20120114990 | SECONDARY BATTERY HAVING IMPROVED SAFETY - Provided are a secondary battery, a battery module, and a battery pack, which have improved safety. Particularly, since a bulletproof material is disposed on the inside and/or the outside of an exterior part, even when a conductive needle-shaped member penetrates a secondary battery, heating, burning, discharge of evaporated electrolyte, and electrical contact between the needle-shaped member and an electrode can be prevented, thereby improving safety of the secondary battery, the battery module, and the battery pack. | 05-10-2012 |
20120176082 | BATTERY PACK SYSTEM OF IMPROVING OPERATING PERFORMANCE USING INTERNAL RESISTANCE OF CELL - Disclosed is a battery pack system to supply current necessary to operate an external device, including a battery module including battery cells which can be charged and discharged, a temperature sensor, an auxiliary power unit to supply a charge and discharge pulse current to the battery module, and a controller to connect the auxiliary power unit to the battery module so that the charge and discharge pulse current is supplied to the battery module when a measured temperature (T | 07-12-2012 |
20120251883 | ELECTROCHEMICAL DEVICE WITH HIGH CAPACITY AND METHOD FOR PREPARING THE SAME - Disclosed is a method for preparing an electrochemical device, comprising the steps of: charging an electrochemical device using an electrode active material having a gas generation plateau potential in a charging period to an extent exceeding the plateau potential; and degassing the electrochemical device. An electrochemical device, which comprises an electrode active material having a gas generation plateau potential in a charging period, and is charged to an extent exceeding the plateau potential and then degassed, is also disclosed. | 10-04-2012 |
20130130076 | BATTERY PACK HAVING NOVEL STRUCTURE - Disclosed herein is a battery pack, temperature of which is controllable, including at least one battery module including a plurality of battery cells or unit modules (‘unit cells’) which can be charged and discharged, a fluid channel formed such that a fluid to cool or heat the battery module passes through the battery module, a flow change unit located on the fluid channel to change a flow direction of the fluid based on a temperature state of the battery module, and an operation controller to control an operation of the flow change unit based on information regarding the temperature of the battery module. | 05-23-2013 |
20130323549 | BATTERY MODULE AND BUS BAR APPLIED TO BATTERY MODULE - Disclosed is a battery module capable of ensuring safety in use by breaking a bus bar when an overcurrent flows at the battery module. The battery module includes at least one unit cell, a case for accommodating the unit cell, and a bus bar electrically connected to the unit cell, wherein the bus bar includes a first metal plate, a second metal plate spaced apart from the first metal plate, and a metal bridge configured to connect the first metal plate and the second metal plate and having a lower melting point than the metal plate. | 12-05-2013 |
20140050950 | SAFETY DEVICE FOR BATTERY PACK - Disclosed herein is a safety device mounted at one side of a battery pack including two or more battery cells or at least one battery module such that the safety device is first short-circuited when a needle type object penetrates the battery pack to secure safety of the battery pack, the safety device including a pair of conductive sheets spaced apart from each other, an electrically insulative housing to surround outsides of the conductive sheets excluding fronts of the conductive sheets in a state in which the conductive sheets are inserted and mounted in the housing, a sealing member to cover the fronts of the conductive sheets, and a connection member to connect the conductive sheets to a cathode and an anode of one of battery cells constituting the battery module. | 02-20-2014 |
20140127549 | BATTERY PACK OF IMPROVED SAFETY - Disclosed herein is a battery pack configured such that battery modules, each of which includes a plurality of battery cells or unit modules connected to each other in series, are connected to each other in series in a state in which the battery modules are in tight contact with each other or stacked adjacent to each other, the battery pack including a fuse connected in series in an electrical connection circuit between the battery modules and a circuit breaker mounted at an outside of at least one of the battery modules to perform electric conduction when the battery cells swell, the circuit breaker being electrically connected to the electrical connection circuit to break the fuse when electric conduction is performed due to swelling of the battery cells. | 05-08-2014 |
20140127550 | BATTERY MODULE OF IMPROVED RELIABILITY AND BATTERY PACK EMPLOYED WITH THE SAME - Disclosed is a battery module including a plurality of plate-shaped battery cells which are sequentially stacked, wherein the battery module is configured to have a structure in which two or more hexahedral cell units are connected to each other in series in a state in which the hexahedral cell units are stacked, each of the cell units is configured to have a structure in which two or more battery cells are connected to each other in series in a state in which the battery cells are in tight contact with each other, and electrode terminals (outermost electrode terminals) of outmost battery cells of the cell units are connected to external input and output terminals of the battery module, the outermost electrode terminals having a larger vertical sectional area than electrode terminals of the other battery cells such that the outermost electrode terminals are prevented from being broken by external force. | 05-08-2014 |