Patent application number | Description | Published |
20080233481 | POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which can achieve high capacity and high output simultaneously, and a non-aqueous electrolyte secondary battery using the same. A non-aqueous electrolyte secondary battery is obtained by using as a positive electrode, a positive electrode active material for a non-aqueous electrolyte secondary battery, which is expressed by the general formula: Li | 09-25-2008 |
20120169288 | SECONDARY BATTERY SYSTEM - A secondary battery system includes a secondary battery containing a positive electrode active material configured from lithium manganate having a spinel crystal structure and a negative electrode active material which undergoes a phase change when charging or discharging. The secondary battery system includes a dQ/dV calculation means (battery controller) for calculating dQ/dV, which is the ratio of the change (dQ) in the accumulated energy (Q) in the secondary battery with respect to the change (dV) in the voltage (V) of the secondary battery when charging or discharging the secondary battery, so as to determine the state of the secondary battery system on the basis of the peaks appearing on the V−dQ/dV curve, which expresses the relationship between the voltage (V) and dQ/dV. | 07-05-2012 |
20120179398 | NONAQUEOUS ELECTROLYTE TYPE LITHIUM ION SECONDARY BATTERY SYSTEM, METHOD OF DETERMINING LITHIUM DEPOSITION IN THE SYSTEM, AND VEHICLE MOUNTING THE SYSTEM - It is arranged to obtain charging voltage when charging voltage is applied to a nonaqueous electrolyte type lithium ion secondary battery and discharging voltage when a discharging current is generated by the battery. A coefficient of a quadratic term of an approximated curve of a quadratic function with respect to changes in value within a sampling period for each of the charging voltage and the discharging voltage is calculated. This calculation is repeated over a plurality of the sampling periods. Based on occurrence situations of symmetry phenomenon and intersection phenomenon in the calculated coefficients, it can be determined whether or not there is a possibility of lithium deposition without disassembling the battery. | 07-12-2012 |
20120251878 | LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR - The lithium secondary battery provided by the present invention includes a negative electrode having a negative electrode collector and a negative electrode layer including a negative electrode active material and formed on the surface of the negative electrode collector, and is characterized in that the negative electrode layer comprises a negative electrode active material layer composed primarily of a negative electrode active material, and an insulating layer composed primarily of an insulating filler and formed on the negative electrode active material layer, and the ratio (Sb/Sa) of a pore specific surface area of the insulating layer (Sb: m | 10-04-2012 |
20130011708 | LITHIUM ION SECONDARY BATTERY, VEHICLE, AND BATTERY MOUNTING DEVICE - A lithium ion secondary battery includes a flat wound electrode body including a positive electrode sheet and a negative electrode sheet that are wound while interposing therebetween separators into a flat shape, and a battery case. In the flat wound electrode body, a central portion has a more constricted shape than end portions by pressing toward a winding axis in a short-side direction and each end portion includes an end-portion positive electrode sheet, an end-portion negative electrode sheet, and end-portion separators, and a core member arranged more inward than them. With tensile forces generated by pressing of the central portion in a central-portion positive electrode sheet, central-portion negative electrode sheet, and central-portion separators, the end-portion positive electrode sheet, end-portion negative electrode sheet, and end-portion separators are in pressure contact with each other and press the outer surfaces of the core member. | 01-10-2013 |
20130084503 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery provided by the present invention includes an electrode body in which a positive electrode sheet and a negative electrode sheet | 04-04-2013 |
20130101876 | LITHIUM SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME - A lithium secondary battery provided by the present invention includes a spirally wound electrode body in which a positive electrode sheet and a negative electrode sheet are spirally wound with a separator sheet | 04-25-2013 |
20130143091 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery obtained by the present invention is a non-aqueous electrolyte secondary battery including an electrode body having a positive electrode sheet and a negative electrode sheet | 06-06-2013 |
20130181684 | BATTERY CONTROL SYSTEM - A battery control system includes a lithium ion secondary battery and a control device and further includes a voltage storage unit, a resistance storage unit, a current storage unit, a difference obtaining unit for obtaining a difference resistance ΔR(T | 07-18-2013 |
20130216893 | NONAQUEOUS ELECTROLYTE LITHIUM SECONDARY BATTERY - A nonaqueous electrolyte lithium secondary battery obtained by the present invention has a separator and a porous layer which contains an inorganic filler and a binder and which is formed on the separator, wherein a thickness of the separator ranges from 12 μm to 18 μm, a porosity of the separator ranges from 52% to 67%, a thickness of the porous layer ranges from 3 μm to 15 μm, a porosity of the porous layer ranges from 44% to 70%, and the porous layer-attached separator exhibits a film resistance equal to or lower than 1.35 Ω·cm | 08-22-2013 |
20130252056 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - The present invention provides an optimal non-aqueous electrolyte secondary battery having high durability against high rate charging and discharging and excellent safety. The non-aqueous electrolyte secondary battery | 09-26-2013 |
20140004400 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND VEHICLE | 01-02-2014 |
20140023908 | LITHIUM-ION SECONDARY BATTERY - The lithium-ion secondary battery | 01-23-2014 |
20140154583 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery | 06-05-2014 |
20140162109 | SECONDARY BATTERY - Provided is a very safe secondary battery that can prevent the occurrence of battery abnormalities even when the internal battery temperature increases due to, for example, overcharging. A separator | 06-12-2014 |
20140193691 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery | 07-10-2014 |
20140220402 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - The nonaqueous electrolyte secondary battery | 08-07-2014 |
20140272534 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - The nonaqueous electrolyte secondary battery of the present invention has a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte solution. The battery further has a porous heat-resistant layer provided between the separator and at least one of the positive electrode and the negative electrode, wherein the porous heat-resistant layer includes an inorganic filler and a binder. The inorganic filler included in the porous heat-resistant layer has a particle size distribution with two peaks, which are a first peak (P1) at a relatively small particle diameter and a second peak (P2) at a relatively large particle diameter. When the particle diameter of the first peak (P1) is D1 be and the particle diameter of the second peak (P2) is D2 being, the peak particle diameter ratio D1/D2 satisfies the condition 0.2≦D1/D2≦0.7. | 09-18-2014 |