Patent application number | Description | Published |
20090274951 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME - A nonaqueous electrolyte secondary battery includes an electrode group in which a positive electrode plate including a positive electrode active material formed on a positive electrode current collector and a negative electrode plate including a negative electrode active material formed on a negative electrode current collector are wound with a separator interposed therebetween, and a tensile elongation rate of the positive electrode plate is larger than a tensile elongation rate of the negative electrode plate. | 11-05-2009 |
20100099029 | LITHIUM ION SECONDARY BATTERY - Disclosed is a lithium ion secondary battery including: a positive electrode including a positive electrode active material layer containing a positive electrode active material, and a positive electrode current collector; a negative electrode including a thin film negative electrode active material layer containing an alloy-based negative electrode active material, and a negative electrode current collector; a separator interposed between the positive electrode and the negative electrode; and an ion-permeable resin layer formed on a surface of the thin film negative electrode active material layer. In this lithium ion secondary battery, despite the use of the alloy-based negative electrode active material, the deterioration in battery performance such as cycle characteristics and output characteristics is prevented. | 04-22-2010 |
20100285368 | LITHIUM ION BATTERY - A lithium ion battery includes: a positive electrode; a negative electrode that includes a negative electrode active material layer that contains an alloy-formable active material; an ion permeable insulating layer that is interposed between the positive electrode and the negative electrode; and an ion conductive polymer layer that is interposed between the negative electrode and the ion permeable insulating layer, in which the ion conductive polymer layer is configured to include a negative electrode-side portion and an ion permeable insulating layer-side portion that have different compositions, and the ion permeable insulating layer-side portion is configured to have higher ion conductivity than the negative electrode-side portion. With such a lithium ion battery, charge/discharge cycle characteristics and rate characteristics can be improved. | 11-11-2010 |
20110008673 | NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - In a non-aqueous electrolyte secondary battery | 01-13-2011 |
20110027650 | NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - Provided are a negative electrode | 02-03-2011 |
20110033735 | BATTERY PACK - A battery pack | 02-10-2011 |
20110262811 | ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND PRODUCTION METHOD THEREOF, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - Provided is a non-aqueous electrolyte secondary battery having excellent input/output characteristics and excellent adherence between its electrode material mixture layer and current collector. Disclosed is an electrode for a non-aqueous electrolyte secondary battery, having a current collector and an electrode material mixture layer attached to a surface of the current collector, in which the electrode material mixture layer includes a metal oxide-containing electrode active material and a binder; the oil absorption capacity of the electrode active material is 25 g or more and 200 g or less, per 100 g of the electrode active material; and when the thickness of the electrode material mixture layer is designated as T, an amount W | 10-27-2011 |
20120032647 | METHOD FOR DETERMINING COMPLETION OF CHARGE OF LITHIUM ION SECONDARY BATTERY, METHOD FOR DETERMINING TERMINATION OF DISCHARGE OF LITHIUM ION SECONDARY BATTERY, CHARGE CONTROL CIRCUIT, DISCHARGE CONTROL CIRCUIT, AND POWER SUPPLY - A method for determining completion of charge of a long-duration lithium ion secondary battery is provided. | 02-09-2012 |
20120105010 | LITHIUM ION SECONDARY BATTERY SYSTEM AND BATTERY PACK - A lithium ion secondary battery system includes: an assembled battery including a plurality of lithium ion secondary batteries; a SOC measuring unit for measuring the SOC of the lithium ion secondary battery, and a temperature sensing unit for sensing the temperature thereof; and a heating unit for heating the lithium ion secondary battery. When a SOC measured by the SOC measuring unit is lower than a preset SOC set in advance in association with discharge rate, and a temperature measured by the temperature sensing unit is lower than a preset temperature set in advance in association with discharge rate, then, a control unit sends a command to the heating unit to supply heat, so that the temperature of the lithium ion secondary battery becomes a predetermined temperature. | 05-03-2012 |
20120231334 | POSITIVE ELECTRODE ACTIVE MATERIAL PARTICLES FOR LITHIUM ION SECONDARY BATTERIES, POSITIVE ELECTRODE USING THE SAME, AND LITHIUM ION SECONDARY BATTERY - Positive electrode active material particles for lithium ion secondary batteries include: a core particle including a first olivine-structured, lithium-containing phosphate compound which includes Fe and/or Mn and Li; and a shell layer attached to the surface of the core particle. The shell layer includes a second olivine-structured, lithium-containing phosphate compound which includes Fe and/or Mn and Li. At least the core particle includes a phosphorous compound represented by the formula (1): Me | 09-13-2012 |
20120319659 | SYSTEM AND METHOD FOR CONTROLLING CHARGE/DISCHARGE OF NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND BATTERY PACK - A charge/discharge control system for controlling charge/discharge of a non-aqueous electrolyte secondary battery having a positive electrode including a composite oxide containing lithium and nickel. This system includes a charge/discharge circuit for discharging the secondary battery and charging the secondary battery with power from an external power source; and a control unit for controlling the charge/discharge circuit such that the voltage of the secondary battery is within a voltage range having a predetermined end-of-discharge voltage as a lower limit value and a predetermined end-of-charge voltage as an upper limit value. The control unit is configured to change at least the end-of-discharge voltage according to a variable related to deterioration of the secondary battery. | 12-20-2012 |