Patent application number | Description | Published |
20100081050 | PRISMATIC SECONDARY CELL - An object of the present invention is to provide a high-output prismatic secondary cell that excels in current collecting efficiency and provides for reliable and highly productive welding with a lower welding current at the time of resistive welding of a current collecting plate onto a core exposed portion of a flat electrode assembly having at both ends a positive electrode core and a negative electrode core. This object is realized by a prismatic secondary cell including: a flat electrode assembly comprising a plurality of first electrode cores and a plurality of second electrode cores, the first electrode cores protruding from one end of the flat electrode assembly while being directly laminated on top of each other, the second electrode cores protruding from another end of the flat electrode assembly while being directly laminated on top of each other; and a first current collecting plate arranged in a first electrode core collected area where the mutually directly laminated first electrode cores protrude, the first current collecting plate being resistive-welded on one plane parallel to a plane on which the first electrode cores are laminated. A first electrode core melt-attached portion where the mutually directly laminated first electrode cores are melt-attached is formed in an area distanced from the area in which the first current collecting plate is attached. | 04-01-2010 |
20100081051 | SEALED BATTERY - The sealed battery of the present invention includes: an electrode assembly | 04-01-2010 |
20100221602 | METHOD FOR MANUFACTURING SEALED BATTERY AND SEALED BATTERY - A method for manufacturing a sealed battery | 09-02-2010 |
20100233529 | SEALED BATTERY AND METHOD FOR MANUFACTURING THE SAME - The sealed battery includes a sealing plate 13 sealing a mouth of an outer can, an external terminal 16 attached to the sealing plate 13 and having a connecting terminal 23, and a current interruption mechanism 18 interrupting current in response to pressure increase in the outer can that is installed in a conductive pathway electrically connecting the connecting terminal 23 and an electrode assembly. In the connecting terminal 23, a through-hole 23 | 09-16-2010 |
20110076552 | SECONDARY BATTERY - By combining crimping fixing and laser welding, a collector attached to a substrate of an electrode assembly is fixed to a terminal. A negative electrode terminal | 03-31-2011 |
20110195301 | PRISMATIC CELL, METHOD OF MANUFACTURING THEREOF, AND ASSEMBLED BATTERY USING THE SAME - The present invention aims to provide a method for insulatively covering the side surfaces and bottom of a prismatic outer can in a simple manner. This can be realized by adopting the following configuration: a prismatic cell including a prismatic outer can having an opening at the top thereof; a sealing body for sealing the opening; and positive and negative electrode external terminals that are protruded from and insulated from the sealing body, wherein the prismatic outer can is covered on the side surfaces and entire bottom with a piece of folded insulation sheet. Preferably, the bottom of the prismatic outer can is covered with only one piece of the insulating sheet, and all edges of the insulating sheet is positioned above the bottom of the outer can. | 08-11-2011 |
20110206962 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME - An aspect of the invention provides a nonaqueous electrolyte secondary battery including a flattened electrode assembly in which a positive electrode plate containing lithium transition metal composite oxide as positive electrode active material, and a negative electrode plate containing carbon material able to insert and extract lithium ions as negative electrode active material, are stacked and wound with a separator interposed therebetween, and a protective layer constituted of inorganic oxide and an insulative binding agent provided on a surface of the negative electrode plate. The arithmetic mean surface roughness Ra of a face of the separator that contacts with the protective layer is 0.40 to 3.50 μm. With the invention, a nonaqueous electrolyte secondary battery is obtained that has enhanced formability of the flattened electrode assembly and superior output characteristics and other battery characteristics. | 08-25-2011 |
20110293975 | TEST METHOD FOR LITHIUM-ION SECONDARY BATTERY - The test method for a lithium-ion secondary battery comprises a measuring potential difference Δ between an outer can and a negative electrode external terminal after a charging process, and if the potential difference Δ is a predetermined prescribed value or greater, the battery is determined as a non-defective product. This method can more accurately detect a battery in which a short circuit occurs temporarily, for example, when the negative electrode external terminal and the outer can come into contact simultaneously with a manufacturing apparatus than the case when a potential difference between the positive electrode external terminal and the outer can is measured. Thus the method can reduce the possibility of corrosion of the outer can due to lithium metal deposited on the inner surface of the outer can. | 12-01-2011 |
20120015225 | PRISMATIC SEALED SECONDARY BATTERY AND MANUFACTURING METHOD FOR THE SAME - A prismatic sealed secondary battery according to an embodiment of the present invention includes an electrode assembly having stacked or wound positive and negative electrode substrate exposed portions and a pair of collector members electrically joined to the respective electrode substrate exposed portions. At least one of the electrode substrate exposed portions is split into two groups, and therebetween is disposed an intermediate member made of resin material and holding a plurality of connective conducting members. The collector member for the substrate exposed portions split into two groups is disposed on at least one of the outermost faces of the substrate exposed portions, and is electrically joined by a resistance welding method to the substrate exposed portions, together with the connecting conductive members of the intermediate member. This configuration lowers resistance of the electrode substrate exposed portions and the collector members and curbs variation in the welding strength. | 01-19-2012 |
20120015238 | NON-AQUEOUS ELECTROLYTE SECONDARY CELL - There is provided a non-aqueous electrolyte secondary cell that exhibits excellent cycle characteristics over a wide temperature range from low to high temperature. This object can be realized by adopting the following configuration. | 01-19-2012 |
20120028088 | PRISMATIC SEALED SECONDARY BATTERY - The positive electrode substrate exposed portions or the negative electrode substrate exposed portions, or both, of an electrode assembly is split into two groups, and therebetween is disposed an intermediate member made of a resin material and holding one or more connecting conductive members. Collector members for the substrate exposed portions split into two groups is electrically joined by a resistance welding method to the substrate exposed portions split into two groups, together with the connecting conductive member(s) of the intermediate member. The resin material portion of the intermediate member protrudes, in the extension direction of the substrate exposed portions split into two groups, beyond the ends of the substrate exposed portions split into two groups and the ends of the collector member to a prismatic outer can. This structure enables enhanced resistance between the substrate exposed portions and the collector member and curbs variation in the welding strength. | 02-02-2012 |
20120107652 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME - A nonaqueous secondary battery includes a current cutoff mechanism that cuts off a current in a short period of time in response to a rise in pressure inside a battery outer body in at least one of a conductive path through which a current is taken out from a positive electrode plate to outside of the battery and a conductive path through which a current is taken out from a negative electrode plate to outside of the battery. At least one type selected from an oligomer containing a cyclohexyl group and a phenyl group, a modified product of the oligomer containing a cyclohexyl group and a phenyl group, a polymer containing a cyclohexyl group and a phenyl group, and a modified product of the polymer containing a cyclohexyl group and a phenyl group is present on the surface of the positive electrode plate. | 05-03-2012 |
20120270085 | SECONDARY BATTERY - By combining crimping fixing and laser welding, a collector attached to a substrate of an electrode assembly is fixed to a terminal. A negative electrode terminal | 10-25-2012 |
20130067727 | SEALED BATTERY AND METHOD FOR MANUFACTURING THE SAME - A sealed battery includes a sealing plate | 03-21-2013 |
20130067728 | SEALED BATTERY AND METHOD FOR MANUFACTURING THE SAME - A sealed battery includes a sealing plate | 03-21-2013 |
20130196186 | PRISMATIC SECONDARY BATTERY - A current interruption mechanism for prismatic secondary battery includes a tubular conductive member electrically connected to a positive electrode external terminal, an inversion plate, and a positive electrode collector connected to the inversion plate. The positive electrode collector has a first region that is parallel to a sealing body and a second region that is connected to a positive electrode plate. The boundaries between the first and second regions are disposed further outward than the inner surface of the tubular conductive member, and at least one of the edge portions, other than the boundaries between the first region and second region, is located further outward than the inner surface of the tubular portion of the conductive member. The current interruption mechanism is unlikely to be damaged even if the battery is subjected to shock due to vibration, falling, etc. | 08-01-2013 |
20130196189 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR MANUFACTURING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND VEHICLE COMPRISING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery includes a current interruption mechanism in at least one of a conductive pathway from the positive electrode sheet to the outside of the outer body and a conductive pathway from the negative electrode sheet to the outside of the outer body. The current interruption mechanism interrupts electric current when the pressure in the outer body exceeds a predetermined value. The nonaqueous electrolyte contains an overcharge inhibitor. The overcharge inhibitor is contained in an amount of 3.0% or more and 4.5% or less with respect to the spatial volume in the outer body in terms of volume ratio. The nonaqueous electrolyte secondary battery has excellent output characteristics in a low temperature condition and can sufficiently ensure reliability even when the battery is overcharged through two-step charging in a low temperature condition. | 08-01-2013 |
20130196220 | PRISMATIC SECONDARY BATTERY - A high-reliability prismatic secondary battery with a current interruption mechanism that is unlikely to be damaged even if the battery is subjected to shock is provided. The prismatic secondary battery includes a second insulating member having a first through-hole, the second insulating member being arranged between a first region of a positive electrode collector and an inversion plate. The first region of the positive electrode collector and the inversion plate are electrically connected to each other through the first through-hole. The second insulating member has a plurality of fixing pawl portions. The fixing pawl portions are hooked and fixed to a fixing portion formed on the outer surface side of the conductive member. | 08-01-2013 |
20130230748 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR MANUFACTURING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND VEHICLE COMPRISING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A method for manufacturing a nonaqueous electrolyte secondary battery including a current interruption mechanism that interrupts electric current includes disposing, in the outer body, an electrode assembly and a nonaqueous electrolyte containing a compound having at least one of a cyclohexyl group and a phenyl group, adjusting the nonaqueous electrolyte to contain the compound having at least one of a cyclohexyl group and a phenyl group in an amount of from 2.5 g/m | 09-05-2013 |
20140023898 | NON-AQUEOUS ELECTROLYTE SECONDARY CELL - The present invention aims to productively provide a non-aqueous electrolyte secondary cell having excellent safety and high capacity. The above object can be achieved by adopting the following configuration. The non-aqueous electrolyte secondary cell comprises a wound electrode assembly formed by winding a positive electrode having a positive electrode active material layer, a negative electrode having a negative electrode active material layer and a separator separating the positive and negative electrodes, wherein: the filling density of the positive electrode active material layer is 2.0-2.8 g/cc; the filling density of the negative electrode active material layer is 1.0-1.5 g/cc; each thickness of the positive electrode and the negative electrode is 100-200 μm; the thickness of the separator is 10-30% of each thickness of the positive and negative electrodes; and the air permeability per unit thickness of the separator is 7.0-27.0 sec/100 cc•μm. | 01-23-2014 |
20140023915 | NON-AQUEOUS ELECTROLYTE SECONDARY CELL - The present invention aims to productively provide a non-aqueous electrolyte secondary cell having high capacity. This object can be achieved by adopting the following configuration. A non-aqueous electrolyte secondary cell comprises a non-aqueous electrolyte and an electrode assembly having a positive electrode, a negative electrode and a separator; the positive electrode has a positive electrode core and a positive electrode active material layer; the negative electrode has a negative electrode core and a negative electrode active material layer; a protective layer is provided on the positive electrode active material layer and/or the negative electrode active material layer; the total thickness of the protective layers is 10 to 40% of that of the separator; a porosity of the protective layer is larger than that of any of the positive and negative electrode active material layer; and the non-aqueous electrolyte contains a non-aqueous solvent and two or more kinds of lithium compounds. | 01-23-2014 |
20140023919 | NON-AQUEOUS ELECTROLYTE SECONDARY CELL - The present invention aims to provide the following non-aqueous electrolyte secondary cell having excellent safety. A non-aqueous electrolyte secondary cell comprises an electrode assembly having positive and negative electrodes. The positive electrode has a core exposed portion (formed by exposing at least one side edge of a belt-shaped core along the longitudinal direction of the core), a active material layer formed on the core, and a protective layer (formed on the core exposed portion near the active material layer and having a lower conductivity than the core). The negative electrode has first and second negative electrode core exposed portions, in which both side edges of a belt-shaped negative electrode core are exposed along the longitudinal direction of the core, and a negative electrode active material layer formed on the negative electrode core. And the whole of the second negative electrode core exposed portion is opposite to the protective layer. | 01-23-2014 |
20150132635 | PRISMATIC SEALED SECONDARY BATTERY - The positive electrode substrate exposed portions or the negative electrode substrate exposed portions, or both, of an electrode assembly is split into two groups, and therebetween is disposed an intermediate member made of a resin material and holding one or more connecting conductive members. Collector members for the substrate exposed portions split into two groups is electrically joined by a resistance welding method to the substrate exposed portions split into two groups, together with the connecting conductive member(s) of the intermediate member. The resin material portion of the intermediate member protrudes, in the extension direction of the substrate exposed portions split into two groups, beyond the ends of the substrate exposed portions split into two groups and the ends of the collector member to a prismatic outer can. This structure enables enhanced resistance between the substrate exposed portions and the collector member and curbs variation in the welding strength. | 05-14-2015 |
Patent application number | Description | Published |
20130196185 | PRISMATIC SECONDARY BATTERY - Disclosed is a highly reliable prismatic secondary battery with a current interruption mechanism that is unlikely to be damaged even if the battery is subjected to shock due to vibration, falling, etc. A second insulating member that has a through-hole is disposed between an inversion plate and the first region of a positive electrode collector, and through the through-hole the first region of the positive electrode collector is electrically connected to the inversion plate. First to third projections to formed around the through-hole formed in the second insulating member fit respectively into first to third openings formed in the first region of the positive electrode collector, and the diameters of their apexes are widened, thus forming first to third fixing portions. Thereby, the second insulating member is robustly joined to the first region of the positive electrode collector. | 08-01-2013 |
20130209849 | PRISMATIC SECONDARY BATTERY - A prismatic secondary battery is provided with a negative/positive electrode collector ( | 08-15-2013 |
20130216913 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery comprises: a positive electrode containing a lithium-transition metal complex oxide having a layered structure as a positive electrode active material; a negative electrode containing a negative electrode active material capable of occluding and releasing lithium ions; and a nonaqueous electrolyte, wherein the lithium-transition metal complex oxide is represented by the general formula Li | 08-22-2013 |
20140045012 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide a non-aqueous electrolyte secondary battery having high capacity and superior safety and cycle characteristics. | 02-13-2014 |
20140045013 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide a non-aqueous electrolyte secondary battery having high capacity and superior safety. | 02-13-2014 |
20140045056 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide with high productivity a non-aqueous electrolyte secondary battery having superior battery characteristics and a high capacity. | 02-13-2014 |
20140045057 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide with high productivity a non-aqueous electrolyte secondary battery having high capacity. | 02-13-2014 |
20140045077 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide a high-capacity non-aqueous electrolyte secondary battery having superior cycle properties and safety. | 02-13-2014 |
20140080010 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide with high productivity a non-aqueous electrolyte secondary battery having high capacity and superior low temperature characteristics. | 03-20-2014 |
20140127561 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide a high-capacity non-aqueous electrolyte secondary battery with superior output characteristics and durability. | 05-08-2014 |