Patent application number | Description | Published |
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 |
20130196187 | PRISMATIC SECONDARY BATTERY - Disclosed is a prismatic secondary battery in which a second insulating member that has a through-hole is disposed between an inversion plate and a 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 by a connecting portion. The positive electrode collector has an annular notch portion that encircles the connecting portions connecting with the inversion plate. The product of the thickness t of the thinnest part of the notch portion and the length L of the notch portion is 0.28 to 0.57 mm | 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 |
20130196191 | SEALED BATTERY - Provided is a sealed battery with improved safety and reliability in which no spark discharge or voltage recovery occurs after a current interrupt mechanism has been actuated. A sealed battery | 08-01-2013 |
20130196192 | SEALED SECONDARY BATTERY - Provided is a sealed secondary battery having a current interrupt mechanism with a high heat resistance that prevents fusion of the current collecting plate by the Joule heat generated during high-rate charge and discharged. A current interrupt mechanism | 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 |
20130196221 | PRISMATIC SECONDARY BATTERY - A crimped portion of a positive electrode external terminal is crimped on its upper end side to be electrically connected to a positive electrode terminal plate. This crimped portion is welded to the positive electrode terminal plate by applying high energy beams. The negative electrode side has a configuration similar to that of the positive electrode side. The contact area between the positive electrode terminal plate and the crimped portion of the positive electrode external terminal is set smaller than the corresponding contact area on the negative electrode side, and the volume of the crimped portion of the positive electrode external terminal is set larger than that of the corresponding crimped portion on the negative electrode side. Thus, a prismatic secondary battery is provided that shows strong joining strength between the external terminal and the terminal plate, suppressed internal resistance variations, and improved reliability. | 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 |
20140023889 | SEALING PLATE FOR PRISMATIC SECONDARY BATTERY AND PRISMATIC SECONDARY BATTERY USING THE SEALING PLATE - A prismatic secondary battery includes a prismatic hollow outer body having a mouth and a bottom; a flat electrode assembly, a positive electrode collector, a negative electrode collector, and an electrolyte, all of which are stored in the prismatic outer body; a sealing plate sealing up the mouth of the prismatic outer body; and a positive electrode terminal attached to the sealing plate in an electrically insulated manner. The sealing plate includes a gas release valve and an electrolyte pour hole and further includes, on the front face, a concaved flat face having an identification code. With the prismatic secondary battery of the invention, a jig for assembly or the like is unlikely to come into contact with the identification code during an assembly process of the prismatic secondary battery, hence the identification code is unlikely to be abraded, and the traceability is unlikely to be lost. | 01-23-2014 |
20140023890 | SEALING PLATE FOR PRISMATIC SECONDARY BATTERY, METHOD FOR PRODUCING THE SAME, AND PRISMATIC SECONDARY BATTERY USING THE SAME - A sealing plate for a prismatic secondary battery includes a pair of mouths for attaching a negative and positive electrode terminals, one mouth being formed near one end in a longitudinal direction of the sealing plate, and the other mouth being formed near the other end, coining areas used for positioning of an insulating member and formed around the pair of mouths on a front face of the sealing plate, a gas release valve and an electrolyte pour hole formed between the pair of mouths, and grooves formed between the respective coining areas and the long side edge of the sealing plate. The groove has a smaller depth near the gas release valve than the depth near the coining area. Even when the sealing plate is produced through forging, the front face has good flatness and the coining areas are unlikely to have a sink mark or a shear drop. | 01-23-2014 |
20140023891 | PRISMATIC SECONDARY BATTERY - A prismatic secondary battery includes a prismatic hollow outer body having a mouth and a bottom and storing an electrode assembly, a positive electrode collector, a negative electrode collector, and an electrolyte, a sealing plate sealing up the mouth of the prismatic hollow outer body, and a positive electrode terminal and a negative electrode terminal attached to the sealing plate; the sealing plate includes a gas release valve at the center between the positive electrode terminal and the negative electrode terminal and includes an electrolyte pour hole on one side of the gas release valve and, on the other side on the front face, a concaved flat face with a height lower than that of the peripheral portion; and the concaved flat face is formed with an identification code. | 01-23-2014 |
20140023913 | PRISMATIC SECONDARY BATTERY - In a prismatic secondary battery, a negative electrode terminal is fixed to a sealing plate in an insulated manner through through-holes formed in the sealing plate, first and second insulating members, and a collector. The collector includes a flat attachment part with the through-hole and a main body bent from an end of the flat attachment part and electrically connected to an electrode assembly. The second insulating member includes a depression having peripheral ribs on an opposite face to the sealing plate. At least one of the peripheral ribs along the short sides thereof has at least one of a width and height larger than that of the peripheral rib along the long sides thereof. The flat attachment part of the collector is fitted to the depression. | 01-23-2014 |
20140023914 | PRISMATIC SECONDARY BATTERY - In a prismatic secondary battery, an internal negative electrode terminal is electrically connected to a collector through through-holes formed in a sealing plate, a gasket, and an insulating member in a manner electrically insulated from the sealing plate. The sealing plate has one face on which a protrusion is formed, an insulating plate has a face that is on the sealing plate and on which a concave portion fitted to the protrusion is formed, each of the protrusion and the concave portion of the insulating plate is provided at one position on respective sides of the through-hole, and at least one of the protrusions has a top face on which a concave portion is formed. The battery having such a structure is unlikely to cause rotary displacement between the insulating plate and the sealing plate even when a rotary torque is applied to the internal terminal. | 01-23-2014 |