Patent application number | Description | Published |
20080213668 | Nonaqueous Electrolyte Secondary Battery - A nonaqueous electrolyte secondary battery has a positive electrode including an active material of complex oxides capable of storing and emitting lithium ions, a negative electrode, a separator, and an electrolytic solution made of a nonaqueous solvent. A discharge curve of this battery when being discharged with a constant power has two or more points of step-like flections near the end of electrical discharge in a range of 5% to 20% of a discharge capacity thereof as determined from an initial discharge voltage in a state of full charge to a discharge-end voltage. | 09-04-2008 |
20090098446 | SECONDARY BATTERY - The secondary battery of this invention includes: an electrode assembly comprising a first electrode and a second electrode which are wound or laminated with only a heat-resistant porous insulating layer interposed between the first electrode and the second electrode; and a first current collector plate electrically connected to the first electrode. The first electrode includes a first electrode mixture layer formed on a first electrode core member. The second electrode includes a second electrode mixture layer formed on a second electrode core member. An end of the first electrode protrudes from an end of the second electrode and an end of the porous insulating layer at an end face of the electrode assembly. The protruding end of the first electrode has a part where the first electrode core member is exposed. The part where the first electrode core member is exposed is welded to the first current collector plate. The end of the porous insulating layer protrudes from an end of the first electrode mixture layer and an end of the second electrode mixture layer. The distance between the first current collector plate and the end of the porous insulating layer on the first current collector plate side is 3 mm or less. | 04-16-2009 |
20090233177 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - One width end of an electrode of a nonaqueous electrolyte secondary battery is provided with an exposed portion. A reinforcing element for reinforcing the exposed portion is provided between adjacent parts of the exposed portion when seen in the longitudinal cross section of the battery. | 09-17-2009 |
20090239139 | SECONDARY BATTERY AND METHOD FOR MANUFACTURING SECONDARY BATTERY - An electrode group | 09-24-2009 |
20090280406 | SECONDARY BATTERY - A secondary battery comprising at least an electrode assembly having a positive electrode plate, a negative electrode plate and a porous insulation layer arranged in a manner that an exposed portion of a current collector provided at one edge of at least one of the positive electrode plate and the negative electrode plate protrudes from the porous insulation layer, current collector members each connected to respective one of the positive electrode plate and the negative electrode plate, and a bend preventing part whose size smaller than a width of the exposed portion of the current collector, provided in a position of the exposed portion of the current collector. | 11-12-2009 |
20090305123 | SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME - A secondary battery includes an electrode group | 12-10-2009 |
20100247991 | BATTERY AND METHOD FOR PRODUCING THE SAME - It is possible to ensure welding of an exposed portion of an electrode core member protruding from one end surface of an electrode group to a desired connection portion of a current collector plate by constituting a battery wherein an end portion of a first electrode is protruding from an end portion of a second electrode and an end portion of a separator on one end surface of an electrode group, the protruding end portion of the first electrode includes an exposed portion of a first electrode core member, the exposed portion of the first electrode core member is welded to a connection portion on one surface of the first current collector plate, and an insulating layer is formed in an area except for a reverse face portion of the connection portion on the other surface of the first current collector plate. | 09-30-2010 |
20100304199 | SECONDARY BATTERY AND METHOD FOR MANUFACTURING SECONDARY BATTERY - An electrode group | 12-02-2010 |
20100310927 | CURRENT COLLECTOR TERMINAL PLATE FOR SECONDARY BATTERY, SECONDARY BATTERY, AND METHOD FOR PRODUCING SECONDARY BATTERY - A current collector terminal plate comprising a plate-shaped conductive material is used. The conductive material has an expected welding portion that melts with priority. The conductive material has, for example, a bent portion forming a protrusion on one side and a depression on the other side and a flat portion, and the expected welding portion includes the bent portion. The bent portion has a pair of upstanding portions raised from the flat portion and a bent top portion extending continuously from the pair of upstanding portions. | 12-09-2010 |
20100316897 | SECONDARY BATTERY - A secondary battery has a so-called tabless structure. An electrode group ( | 12-16-2010 |
20110008661 | LITHIUM ION SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME - A lithium ion secondary battery of the invention includes an electrode structure including an electrode group composed of a strip-shaped laminate or winding including a positive electrode in which a positive electrode active material layer is attached to a positive electrode current collector, a negative electrode, and a separator; a positive electrode current collector plate including aluminum foil; and a negative electrode current collector plate electrically connected to the negative electrode. The positive electrode has, at one longitudinally extending end edge of the laminate, a positive electrode current collector-exposed portion protruding beyond the negative electrode. The positive electrode current collector plate is electrically connected to the positive electrode by applying a non-corrosive flux containing a fluoride to at least one of the positive electrode current collector-exposed portion and the positive electrode current collector plate, and then welding the positive electrode current collector plate to the positive electrode current collector-exposed portion. | 01-13-2011 |
20110086258 | METHOD FOR MANUFACTURING SECONDARY BATTERY AND SECONDARY BATTERY - A method includes: preparing an electrode group | 04-14-2011 |